CN105103637B - Device communication method and device - Google Patents

Abstract

The invention discloses a device communication method and device, and relates to the field of communication. The device includes a resource allocation module, a signaling generation module and a signaling transmission module. The method includes: when the unlicensed spectrum is in an available state, allocating a first radio resource of an unlicensed spectrum to a user equipment UE, where the unlicensed spectrum refers to a spectrum used by each wireless access system for competition; The radio resource generates control signaling corresponding to the UE, and the control signaling carries the indication information for indicating the first radio resource; sends the control signaling to the UE, so that the UE adopts the device-to-device on the first radio resource determined according to the indication information. D2D communication mode realizes data transmission. The invention solves the problem that the radio resources allocated by the eNB to the UE in the D2D communication mode cannot meet the increasing frequency spectrum demand, and achieves the effect of improving the communication efficiency between the UEs in the D2D communication mode.

Description

Device communication method and device

technical field

The present invention relates to the field of communications, and in particular, to a device communication method and device.

Background technique

A D2D (Device to Device, device to device) communication mode refers to a mode in which UEs (User Equipment, user equipment) perform direct communication by reusing spectrum resources of a cell. Since the UEs can communicate directly, the D2D communication mode can reduce the overhead of control signaling between the base station and the UE, reduce the transmit power of the UE, improve the utilization rate of spectrum resources, and improve the capacity of the cellular network.

When using the D2D communication mode for data transmission, the eNB (evolved Node B, evolved base station) allocates radio resources of the authorized spectrum to the first UE and the second UE respectively, and sends a message to the first UE and the second UE for indicating The measurement configuration for the measurement of the licensed spectrum, the first UE and the second UE add the information and radio conditions of the opposite end acquired in the measurement process to the measurement result and report it to the eNB, and the eNB determines that the radio conditions are suitable for using the D2D communication mode When performing data transmission, sending first control signaling to the first UE for instructing the first UE to send data on the allocated radio resources and sending to the second UE for instructing the second UE to receive data on the allocated radio resources the second control signaling, the first UE sends data on the radio resources according to the first control signaling, and the second UE receives data on the radio resources according to the second control signaling, so as to realize the communication between the first UE and the second UE. data transmission. Among them, the authorized spectrum refers to the spectrum that is allocated by the spectrum regulator to the designated wireless access system for exclusive use.

In the process of realizing the present invention, the inventor found that there are at least the following defects in the prior art:

Since the licensed spectrum that the eNB can provide is certain, and the demand for spectrum and bandwidth of services is increasing, the radio resources allocated by the eNB to the UE in the D2D communication mode cannot meet the increasing spectrum demand, resulting in the adoption of the D2D communication mode. The communication efficiency between the UEs is not high.

SUMMARY OF THE INVENTION

In order to solve the problem that the radio resources allocated by the eNB to the UEs in the D2D communication mode cannot meet the increasing spectrum requirements, resulting in low communication efficiency between the UEs in the D2D communication mode, an embodiment of the present invention provides a device communication method and device. The technical solution is as follows:

In a first aspect, an embodiment of the present invention provides a device communication apparatus, which is used in a target device, and the apparatus includes:

a resource allocation module, configured to allocate a first radio resource of the unlicensed spectrum to the user equipment UE when the unlicensed spectrum is in an available state, where the unlicensed spectrum refers to a spectrum used for competition by each wireless access system;

a signaling generation module, configured to generate control signaling corresponding to the UE according to the first radio resource allocated by the resource allocation module, where the control signaling carries indication information for indicating the first radio resource ;

a signaling sending module, configured to send the control signaling generated by the signaling generating module to the UE, so that the UE adopts device-to-device D2D on the first radio resource determined according to the indication information The communication mode realizes data transmission.

In a first possible implementation manner of the first aspect, the signaling sending module includes:

a first sending unit, configured to send the control signaling to the UE through the second radio resource of the licensed spectrum configured for the UE by the evolved base station eNB; or,

a second sending unit, configured to send the control signaling to the UE through a third radio resource of an unlicensed spectrum, where the third radio resource is determined by control signaling indication information or pre-configuration, and the control signaling indicates The information is sent by the eNB on the second radio resource of the licensed spectrum configured by the eNB for the UE.

With reference to the first possible implementation manner of the first aspect, in a second possible implementation manner of the first aspect, the second sending unit includes:

a first sending subunit, configured to send the control signaling indication information to the UE through the second radio resource when the target device is an eNB, and then use the control signaling indication information to determine the The third radio resource sends the control signaling to the UE, so that the UE receives the control signaling on the third radio resource determined by the control signaling indication information;

The second sending subunit is configured to, when the target device is the master UE sending the control signaling, determine that the UE receiving the control signaling is a slave UE, and receive the eNB on the second radio resource The sent control signaling indication information, and then send the control signaling to the secondary UE through the third radio resource determined by the control signaling indication information, so that the secondary UE can use the control signaling in the control signaling. The control signaling is received on the third radio resource determined by the indication information.

In a third possible implementation manner of the first aspect, the apparatus further includes:

a signal detection module, configured to detect the signal quality of the unlicensed spectrum every predetermined time;

a first communication module, configured to instruct the UE to use the D2D communication mode to implement data transmission when the result of detection by the signal detection module is that the signal quality of the unlicensed spectrum meets a preset condition;

A second communication module, configured to instruct the UE to implement data transmission in a cell communication mode when the signal quality of the unlicensed spectrum does not meet a preset condition as a result of detection by the signal detection module, and the cell communication mode is It means that the UE performs data transmission through the eNB.

In a fourth possible implementation manner of the first aspect, if the target device is the master UE and the D2D communication mode is broadcast or multicast, the apparatus further includes:

a data dissemination module, configured to send data to at least one slave UE on the first radio resource by means of broadcast or multicast after the signaling sending module sends the control signaling to the UE;

A data sending module, configured to send the data to the slave UE again on the fourth radio resource of the authorized spectrum if there is a slave UE that has not received the data propagated by the data propagation module.

In combination with the first aspect or the first possible implementation of the first aspect or the second possible implementation of the first aspect or the third possible implementation of the first aspect or the fourth possible implementation of the first aspect Implementation, in a fifth possible implementation of the first aspect, the resource allocation module includes:

a first allocation unit, configured to determine an unlicensed spectrum in an available state if the target device is an eNB and there is no UE served by other eNBs in the UE, and select from the determined unlicensed spectrum The first wireless resource of the unlicensed spectrum is used as the allocated first wireless resource;

a second allocation unit, configured to receive an unlicensed spectrum resource pool allocated by the eNB if the target device is a master UE and there is no slave UE served by another eNB in the slave UE, the unlicensed spectrum resource pool The unlicensed spectrum in an available state is included, and the first radio resource of the unlicensed spectrum selected from the unlicensed spectrum resource pool is used as the allocated first radio resource.

In combination with the first aspect or the first possible implementation of the first aspect or the second possible implementation of the first aspect or the third possible implementation of the first aspect or the fourth possible implementation of the first aspect Implementation manner, in a sixth possible implementation manner of the first aspect, the resource allocation module includes:

The third allocation unit is configured to perform allocation negotiation with the other eNBs if the target device is an eNB and there is at least one UE served by other eNBs in the UE, and allocate the negotiated eNB and the The first radio resource of the unlicensed spectrum jointly occupied by other eNBs is used as the allocated first radio resource;

a fourth allocating unit, configured to receive an unlicensed spectrum resource sent by an eNB serving the master UE if the target device is a master UE and there is at least one slave UE served by another eNB in the slave UE The unlicensed spectrum resource pool is jointly occupied by the eNB and the other eNBs after the allocation negotiation, and the first radio resource of the unlicensed spectrum selected from the unlicensed spectrum resource pool is allocated as the allocation of the first radio resource.

In combination with the first aspect or the first possible implementation of the first aspect or the second possible implementation of the first aspect or the third possible implementation of the first aspect or the fourth possible implementation of the first aspect Implementation, in a seventh possible implementation of the first aspect, the resource allocation module includes:

a fifth allocation unit, configured to dynamically allocate the first radio resource of the unlicensed spectrum to the UE for each data transmission using the D2D communication mode; or,

A sixth allocating unit, configured to allocate the first radio resource of the unlicensed spectrum to the UE according to a preconfigured semi-static allocation strategy, where the semi-static allocation strategy is to allocate the unlicensed spectrum every time the unlicensed spectrum is available. an allocation strategy of the first radio resource of the unlicensed spectrum.

In a second aspect, an embodiment of the present invention provides a device communication apparatus, which is used in a target device, and the apparatus includes:

a processor, configured to allocate the first radio resource of the unlicensed spectrum to the user equipment UE when the unlicensed spectrum is in an available state, where the unlicensed spectrum refers to the spectrum used by each wireless access system for competition; according to the allocation generating control signaling corresponding to the UE for the first radio resource, where the control signaling carries indication information for indicating the first radio resource;

a transmitter, configured to send the control signaling generated by the processor to the UE, so that the UE implements data using a device-to-device D2D communication mode on the first radio resource determined according to the indication information transmission.

In a first possible implementation manner of the second aspect, the transmitter is specifically configured to send the control signaling to the UE through the second radio resource of the licensed spectrum configured for the UE by the evolved base station eNB Or, send the control signaling to the UE through the third radio resource of the unlicensed spectrum, the third radio resource is determined by the control signaling indication information or pre-configuration, and the control signaling indication information is the eNB in the The transmission is performed on the second radio resource of the licensed spectrum configured by the eNB for the UE.

With reference to the first possible implementation manner of the second aspect, in a second possible implementation manner of the second aspect, the processor is specifically configured to, when the target device is an eNB, use the second wireless The resource sends the control signaling indication information to the UE, and then sends the control signaling to the UE through the third radio resource determined by the control signaling indication information, so that the UE is in the control Receive the control signaling on the third radio resource determined by the signaling indication information; when the target device is the master UE that sends the control signaling, determine that the UE receiving the control signaling is the slave UE, Receive the control signaling indication information sent by the eNB on the second radio resource, and then send the control signaling to the slave UE through the third radio resource determined by the control signaling indication information , so that the secondary UE receives the control signaling on the third radio resource determined by the control signaling indication information.

In a third possible implementation manner of the second aspect, the processor is further configured to detect the signal quality of the unlicensed spectrum every predetermined time; if the detection result is that the signal quality of the unlicensed spectrum meets the predetermined If the condition is set, the UE is instructed to use the D2D communication mode to implement data transmission; if the detection result is that the signal quality of the unlicensed spectrum does not meet the preset condition, the UE is instructed to use the cell communication mode to implement data transmission, so The cell communication mode refers to that the UE performs data transmission through the eNB.

In a third possible implementation manner of the second aspect, if the target device is the master UE and the D2D communication mode is broadcast or multicast, the transmitter is further configured to send the information to the UE. After the control signaling, send data to at least one slave UE on the first radio resource through broadcast or multicast; if there is a slave UE that has not received the data, send data on the fourth radio resource of the licensed spectrum The data is sent to the slave UE again.

In combination with the second aspect or the first possible implementation of the second aspect or the second possible implementation of the second aspect or the third possible implementation of the second aspect or the fourth possible implementation of the second aspect Implementation manner, in a fifth possible implementation manner of the second aspect, the processor is specifically configured to determine if the target device is an eNB and there is no UE served by other eNBs in the UE. The unlicensed spectrum in the available state, the first radio resource of the unlicensed spectrum selected from the determined unlicensed spectrum is used as the allocated first radio resource; if the target device is the master UE and the slave There is no secondary UE served by other eNBs in the UE, and the unlicensed spectrum resource pool allocated by the eNB is received, and the unlicensed spectrum resource pool includes the unlicensed spectrum in the available state, and the unlicensed spectrum resource pool will be retrieved from the unlicensed spectrum resource pool. The selected first radio resource of the unlicensed spectrum is used as the allocated first radio resource.

In combination with the second aspect or the first possible implementation of the second aspect or the second possible implementation of the second aspect or the third possible implementation of the second aspect or the fourth possible implementation of the second aspect Implementation manner, in a sixth possible implementation manner of the second aspect, the processor is specifically configured to, if the target device is an eNB and there is at least one UE served by another eNB in the UE, and The other eNBs perform allocation negotiation, and use the negotiated first radio resources of the unlicensed spectrum jointly occupied by the eNB and the other eNBs as the allocated first radio resources; if the target device is the master UE and There is at least one slave UE served by other eNBs in the slave UE, and the unlicensed spectrum resource pool sent by the eNB serving the master UE is received, and the unlicensed spectrum resource pool is the relationship between the eNB and the If other eNBs determine to jointly occupy after the allocation negotiation, the first radio resource of the unlicensed spectrum selected from the unlicensed spectrum resource pool is used as the allocated first radio resource.

In combination with the second aspect or the first possible implementation of the second aspect or the second possible implementation of the second aspect or the third possible implementation of the second aspect or the fourth possible implementation of the second aspect Implementation manner, in a seventh possible implementation manner of the second aspect, the processor is specifically configured to dynamically allocate the unlicensed spectrum to the UE for each data transmission using the D2D communication mode. the first radio resource; or, allocate the first radio resource of the unlicensed spectrum to the UE according to a pre-configured semi-static allocation strategy, where the semi-static allocation strategy is to allocate the unlicensed spectrum every time the unlicensed spectrum is available. an allocation strategy of the first radio resource of the unlicensed spectrum.

In a third aspect, an embodiment of the present invention provides a device communication method for use in a target device, the method comprising:

when the unlicensed spectrum is in an available state, allocating a first radio resource of the unlicensed spectrum to the user equipment UE, where the unlicensed spectrum refers to a spectrum used by each radio access system for competition;

generating control signaling corresponding to the UE according to the allocated first radio resource, where the control signaling carries indication information for indicating the first radio resource;

The control signaling is sent to the UE, so that the UE implements data transmission in a device-to-device D2D communication mode on the first radio resource determined according to the indication information.

In a first possible implementation manner of the third aspect, the sending the control signaling to the UE includes:

Send the control signaling to the UE through the second radio resource of the licensed spectrum configured for the UE by the evolved base station eNB; or,

The control signaling is sent to the UE through the third radio resource of the unlicensed spectrum, where the third radio resource is determined by control signaling indication information or pre-configuration, and the control signaling indication information is the and sent on the second radio resource of the licensed spectrum configured for the UE.

With reference to the first possible implementation manner of the third aspect, in a second possible implementation manner of the third aspect, the sending the control signaling to the UE through the first radio resource includes:

When the target device is an eNB, send the control signaling indication information to the UE through the second radio resource, and then send the control signaling indication information to the UE through the third radio resource determined by the control signaling indication information sending the control signaling, so that the UE receives the control signaling on the third radio resource determined by the control signaling indication information;

When the target device is the master UE that sends the control signaling, determine that the UE that receives the control signaling is a slave UE, and receives the control signaling indication sent by the eNB on the second radio resource information, and then send the control signaling to the secondary UE through the third radio resource determined by the control signaling indication information, so that the secondary UE can display the third radio resource determined by the control signaling indication information. The control signaling is received on the radio resource.

In a third possible implementation manner of the third aspect, the method further includes:

detecting the signal quality of the unlicensed spectrum every predetermined time;

If the detection result is that the signal quality of the unlicensed spectrum meets a preset condition, instructing the UE to implement data transmission in the D2D communication mode;

If the detection result is that the signal quality of the unlicensed spectrum does not meet the preset condition, the UE is instructed to use a cell communication mode to implement data transmission, and the cell communication mode means that the UE performs data transmission through the eNB.

In a fourth possible implementation manner of the third aspect, if the target device is a master UE and the D2D communication mode is broadcast or multicast, after sending the control signaling to the UE, Also includes:

Send data to at least one slave UE on the first radio resource by broadcasting or multicasting;

If there is a secondary UE that has not received the data, the data is sent to the secondary UE again on the fourth radio resource of the licensed spectrum.

In combination with the third aspect or the first possible implementation of the third aspect or the second possible implementation of the third aspect or the third possible implementation of the third aspect or the fourth possible implementation of the third aspect Implementation manner, in a fifth possible implementation manner of the third aspect, the allocating the first radio resource of the unlicensed spectrum to the user equipment UE includes:

If the target device is an eNB and there is no UE served by other eNBs in the UE, determine the unlicensed spectrum in an available state, and use the third unlicensed spectrum selected from the determined unlicensed spectrum. a radio resource as the allocated first radio resource;

If the target device is a master UE and there is no slave UE served by other eNBs in the slave UEs, receive an unlicensed spectrum resource pool allocated by the eNB, where the unlicensed spectrum resource pool includes unlicensed spectrum resources in an available state spectrum, the first radio resource of the unlicensed spectrum selected from the unlicensed spectrum resource pool is used as the allocated first radio resource.

In combination with the third aspect or the first possible implementation of the third aspect or the second possible implementation of the third aspect or the third possible implementation of the third aspect or the fourth possible implementation of the third aspect Implementation manner, in a sixth possible implementation manner of the third aspect, the allocating the first radio resource of the unlicensed spectrum to the user equipment UE includes:

If the target device is an eNB and there is at least one UE served by other eNBs in the UE, perform allocation negotiation with the other eNBs, and use the negotiated unlicensed shared occupied by the eNB and the other eNBs. The first radio resource of the frequency spectrum is used as the allocated first radio resource;

If the target device is a master UE and there is at least one slave UE served by another eNB in the slave UE, receive an unlicensed spectrum resource pool sent by the eNB serving the master UE, the unlicensed spectrum The resource pool is determined to be jointly occupied by the eNB and the other eNBs after the allocation negotiation, and the first radio resource of the unlicensed spectrum selected from the unlicensed spectrum resource pool is used as the allocated first radio resource .

In combination with the third aspect or the first possible implementation of the third aspect or the second possible implementation of the third aspect or the third possible implementation of the third aspect or the fourth possible implementation of the third aspect Implementation manner, in a seventh possible implementation manner of the third aspect, the allocating the first radio resource of the unlicensed spectrum to the user equipment UE includes:

For each data transmission using the D2D communication mode, dynamically allocate the first radio resource of the unlicensed spectrum to the UE; or,

The UE is allocated the first radio resource of the unlicensed spectrum according to a preconfigured semi-static allocation strategy, wherein the semi-static allocation strategy is to allocate the first radio resource of the unlicensed spectrum to the unlicensed spectrum every time the unlicensed spectrum is available. A radio resource allocation strategy.

The beneficial effects of the technical solutions provided by the embodiments of the present invention are:

By allocating the first radio resource of the unlicensed spectrum to the UE when the unlicensed spectrum is available; generating control signaling corresponding to the UE according to the allocated first radio resource, where the control signaling carries the information for indicating the first radio resource send control signaling to the UE, so that the UE uses the D2D communication mode to realize data transmission on the first radio resource determined according to the instruction information, and can use D2D communication on the first radio resource of the unlicensed spectrum that is in an available state. mode for data transmission without additional allocation of radio resources on the authorized spectrum to the UE, which solves the problem that the radio resources allocated by the eNB to the UE in the D2D communication mode are difficult to meet the increasing spectrum demand, resulting in the use of D2D communication mode. The problem of low communication efficiency is achieved, and the effect of improving the communication efficiency between UEs adopting the D2D communication mode is achieved.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative effort.

1 is a structural frame diagram of a device communication apparatus provided by an embodiment of the present invention;

FIG. 2 is a structural frame diagram of a device communication apparatus provided by still another embodiment of the present invention;

3 is a structural frame diagram of a device communication apparatus provided by still another embodiment of the present invention;

4 is a structural frame diagram of a device communication apparatus provided by another embodiment of the present invention;

5 is a method flowchart of a device communication method provided by an embodiment of the present invention;

6 is a method flowchart of a device communication method provided by another embodiment of the present invention;

FIG. 7 is a method flowchart of a device communication method provided by another embodiment of the present invention.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present invention clearer, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

This embodiment relates to a device communication method, in which a UE using a D2D communication mode transmits data on radio resources of an unlicensed spectrum. The unlicensed spectrum is used by each wireless access system in competition, and the wireless access system needs to release the wireless resources of the unlicensed spectrum after using it for a certain period of time, and restart the competition for the wireless resources of the unlicensed spectrum after a certain period of idle time, so as to give the wireless access to the unlicensed spectrum. access to the system to level the playing field and use the wireless resources of unlicensed spectrum. The radio access system refers to a system that accesses a network through a RAT (Radio Access Technology, radio access technology). The wireless access system includes a cellular network system, a WiFi (Wireless Fidelity, wireless fidelity) system, a Bluetooth system, a Zigbee (Purple Peak) system, and the like. Cellular networks include LTE (Long Term Evolution, long term evolution), LTE-A (LTE-Advance, advanced long term evolution technology), GSM (Global System for Mobile communication, global system for mobile communication), UMTS (Universal Mobile Telecommunications System, universal mobile communication) Communication system) and CDMA (Code Division Multiple Access, Code Division Multiple Access) 2000 and so on.

This embodiment is described by taking the device communication method applied to LTE-A as an example. CA (Carrier Aggregation, carrier aggregation) of LTE-A aggregates multiple consecutive or non-consecutive CCs (Component Carrier, component carrier) to improve the User peak data rate and system throughput. The aggregated component carriers include one PCell (Primary Cell, primary cell) and 0 to 5 SCells (Secondary Cell, secondary cell). The PCell is a cell when the UE performs a random access procedure to initially access the system or performs a handover procedure to access the target base station. PCell also provides security and NAS (Non-Access Stratum, non-access stratum) signaling transmission. SCell mainly provides additional radio resources for data transmission. Therefore, LTE-A can utilize unlicensed spectrum through CA technology, that is, use unlicensed spectrum as SCell.

Please refer to FIG. 1 , which shows a structural frame diagram of a device communication apparatus provided by an embodiment of the present invention. The device communication device can be used in the target device, including:

The resource allocation module 110 is configured to allocate the first wireless resource of the unlicensed spectrum to the UE when the unlicensed spectrum is in an available state, where the unlicensed spectrum refers to the spectrum used by each wireless access system for competition;

After determining that the unlicensed spectrum is available, the target device can allocate the first radio resource of the unlicensed spectrum to the UE. For example, if the unlicensed spectrum in the frequency region of 5170-5190MHz is available, the target device can select a PRB (Physical Resource Block) in the frequency region of 5170-5175MHz in the 5170-5190MHz frequency region for implementation in the D2D communication mode Data transmission, and then select the PRB in the 5170-5172MHz frequency region from the PRB in the 5170-5175MHz frequency region as the first radio resource used by the UE; or, the target device can directly select the 5170-5172MHz frequency region in the 5170-5190MHz region The PRB is used as the first radio resource used by the UE, and the frequency resources used for D2D communication may also be discontinuous. For different D2D communication UEs may select PRBs in different frequency regions in the 5170-5190 MHz range, which is not limited in this embodiment. The allocation manner in which the target device allocates the first radio resource does not limit whether the D2D communication uses the uplink resource or the downlink resource of the cell.

The available status of unlicensed spectrum includes at least two situations. One is that the unlicensed spectrum is in an idle state and is not occupied by other wireless access systems; And/or the UE is far away or the power is low, the eNB and the UE or between the UE and the UE can still use the unlicensed spectrum for normal communication without causing serious interference to other wireless access systems.

a signaling generating module 120, configured to generate control signaling corresponding to the UE according to the first radio resource allocated by the resource allocation modulo 110 block, where the control signaling carries indication information for indicating the first radio resource;

In order for the UE to specify the first radio resource of the unlicensed spectrum allocated to the UE, the target device needs to obtain the indication information of the first radio resource, and add the indication information to the control signaling and send it to the UE. The indication information is used to indicate which time slot and which frequency region the UE transmits or receives data in. In this embodiment, a time slot refers to a transmission time interval TTI (Transmission Time Interval), that is, a scheduling time unit. In LTE, one TTI corresponds to one subframe (subframe), occupies a time of 1 ms, and includes two time slots (slots). ).

The signaling sending module 130 is configured to send the control signaling generated by the signaling generating module 120 to the UE, so that the UE implements data transmission in the D2D communication mode on the first radio resource determined according to the indication information.

After the target device sends the control signaling to the UE, the UE can determine which time slot and which frequency region to send or receive data in according to the indication information in the control signaling.

To sum up, the device communication apparatus provided by the embodiment of the present invention allocates the first radio resource of the unlicensed spectrum to the UE when the unlicensed spectrum is available; generates a control corresponding to the UE according to the allocated first radio resource Signaling, the control signaling carries the indication information used to indicate the first radio resource; send control signaling to the UE, so that the UE implements data transmission in the D2D communication mode on the first radio resource determined according to the indication information, which can be The D2D communication mode is used for data transmission on the first radio resource of the unlicensed spectrum in the available state, without additionally allocating radio resources on the licensed spectrum to the UE, which solves the problem that the radio resources allocated by the eNB for the UE in the D2D communication mode are difficult to meet. The ever-increasing spectrum demand leads to the problem of low communication efficiency between UEs adopting the D2D communication mode, which achieves the effect of improving the communication efficiency between UEs adopting the D2D communication mode.

Please refer to FIG. 2 , which shows a structural frame diagram of a device communication apparatus provided by yet another embodiment of the present invention. The device communication apparatus can be used in a target device. In this embodiment, the target device is an eNB in a cellular network as an example. The eNB can be a micro base station, a small base station, or a macro base station. Generally, the transmit power and Coverage varies. The device communication apparatus includes: a resource allocation module 110, a signaling generating module 120 and a signaling sending module 130;

The resource allocation module 110 is configured to allocate the first wireless resource of the unlicensed spectrum to the UE when the unlicensed spectrum is in an available state, where the unlicensed spectrum refers to the spectrum used by each wireless access system for competition;

In this embodiment, the eNB needs to configure a carrier for each of the at least two UEs respectively. Specifically, the eNB may configure the PCell in the frequency band of the licensed spectrum, and configure the SCell in the frequency band of the unlicensed spectrum, and send the carrier configuration information of each cell to the UE.

After the carrier configuration is completed, the eNB needs to determine whether the unlicensed spectrum is available and whether the D2D communication mode can be used for data transmission between at least two UEs. Taking the example that at least two UEs are the first UE and the second UE respectively, the eNB can deliver the measurement configuration to the first UE and the second UE respectively, and the measurement configuration and the configuration carrier can use the same message or a different message sent to the first UE and the second UE. The first UE and the second UE respectively send the measurement results obtained by the measurement to the eNB according to the measurement configuration, and the eNB determines whether the unlicensed spectrum is available and whether the D2D communication mode can be used for data transmission between the at least two UEs according to the measurement results.

Specifically, taking the measurement configuration sent by the eNB to the first UE as an example, the measurement configuration instructs the first UE to perform spectrum sensing or spectrum detection on the unlicensed spectrum where the SCell is located. Energy Detection) or Matched Filter Detection or Covariance Matrix Detection or Cyclostationary Feature Detection or Eigenvalue Based Spectrum Sensing or RSSI (Received Signal Strength) Indication, received signal strength indication) or interference measurement (InterferenceMeasurement) or SNR (Signal To Noise Rate, Signal to Noise Ratio) measurement or SINR (Signal To Interference Noise Rate, Signal to Interference Noise Ratio) measurement or ROT (Rise Over Thermal, thermal noise rises ) measurement and other technologies to detect the available state of the unlicensed spectrum, and add the detection result to the measurement report and send it to the eNB. The eNB determines whether the unlicensed spectrum is available according to the measurement result. The method for performing spectrum sensing or spectrum detection on the unlicensed spectrum in the following is the same as that in this embodiment, and will not be described in detail below.

The available status of unlicensed spectrum includes at least two situations. One is that the unlicensed spectrum is in an idle state and is not occupied by other wireless access systems; And/or the UE is far away or the power is low, the eNB and the UE or between the UE and the UE can still use the unlicensed spectrum for normal communication without causing serious interference to other wireless access systems.

In addition, the measurement configuration may also include the communication identifier, synchronization identifier, and discovery signal of the first UE, so that the first UE sends the discovery signal and the communication identifier when receiving the synchronization identifier, and the second UE receives the synchronization identifier included in the measurement configuration. Receive the discovery signal and the communication identifier sent by the first UE, and measure RSRP (Reference Signal Received Power, reference signal received power) or CQI (Channel Quality Indication, channel quality indication) or path loss (Pathloss) according to the synchronization signal and/or the discovery signal ), etc., add the communication identifier of the first UE and other data obtained by measurement to the measurement report and send it to the eNB. When it is clear that the distance between the first UE and the second UE is close and the signal quality is good, the eNB determines the A D2D communication mode may be used to transmit data between a UE and a second UE on the wireless resources of the unlicensed spectrum.

After determining that the unlicensed spectrum is available and the D2D communication mode can be used to transmit data between at least two UEs, the eNB can allocate the first radio resource of the unlicensed spectrum to the UE. For example, if the unlicensed spectrum in the frequency region of 5170-5190MHz is available, the eNB can select the PRB in the frequency region of 5170-5175MHz in the frequency region of 5170-5175MHz for data transmission in the D2D communication mode, and then in the frequency region of 5170-5175MHz The PRB in the 5170-5172MHz frequency region is selected as the first radio resource used by the UE; or, the eNB can directly select the PRB in the 5170-5172MHz frequency region in the 5170-5190MHz as the first radio resource used by the UE , the frequency resources used for D2D communication may also be discontinuous, and for different D2D communication UEs can select PRBs in different frequency regions in the 5170-5190 MHz range. It is not limited whether the D2D communication uses the uplink resources of the cell or the downlink resources.

a signaling generating module 120, configured to generate control signaling corresponding to the UE according to the first radio resource allocated by the resource allocation modulo 110 block, where the control signaling carries indication information for indicating the first radio resource;

In order for the UE to specify the first radio resource of the unlicensed spectrum allocated to the UE, the eNB needs to acquire the indication information of the first radio resource, and add the indication information to the control signaling corresponding to the UE and send it to the UE. The indication information is used to indicate which time slot and which frequency region the UE transmits or receives data in.

Since the UE can only perform a receiving operation or a sending operation at the same time when data is transmitted in the D2D communication mode, the eNB also needs to indicate the operation type of the UE in the control signaling. For example, when the first UE sends data and the second UE receives data, the control signaling corresponding to the first UE is used to instruct the first UE to send data from a certain frequency region in a certain time slot, and the control signaling corresponding to the second UE is used to instruct the first UE to send data from a certain frequency region in a certain time slot. The control signaling is used to instruct the second UE to receive data from a certain frequency region in a certain time slot. Or pre-configure the first UE to send data in the first type of time slot, the second UE to receive data in the first type of time slot, and the first UE to receive data in the second type of time slot, and the second UE to send data in the second type of time slot data, where the first type of time slot and the second type of time slot are different, and they together form all or part of the time slot, then the first UE and the second UE send and receive data according to the pre-configured time slot position, without using The eNB indicates the operation type of the UE through control signaling.

The signaling sending module 130 is configured to send the control signaling generated by the signaling generating module 120 to the UE, so that the UE implements data transmission in the D2D communication mode on the first radio resource determined according to the indication information.

After the eNB sends the control signaling to the UE, the UE can determine which time slot and which frequency region to send or receive data in according to the indication information in the control signaling.

Optionally, the signaling sending module 130 includes:

a first sending unit 131, configured to send control signaling to the UE through the second radio resource of the licensed spectrum configured by the eNB for the UE; or,

In order to ensure that the UE can correctly receive the control signaling, so as to improve the reliability of transmitting the control signaling, the eNB may configure the second radio resource of the licensed spectrum for sending the control signaling. In this embodiment, since the PCell is configured in the frequency band of the licensed spectrum, the eNB can use the PDCCH (Physical Downlink Control Channel, Physical Downlink Control Channel) or EPDCCH (Enhanced PDCCH, Enhanced Physical Downlink Control Channel) on the PCell ) sends control signaling to the UE. When the second radio resource is used for the PDCCH, the second radio resource includes, in the time domain, the first to second or the first to third OFDM (Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing) in the subframe where the PDCCH is transmitted. The control domain position of the symbol may occupy a part of the frequency range where the PCell is located in the frequency domain, and is determined by the amount of resources required by the PDCCH signaling itself, such as the PDCCH format, resource allocation information and other factors. When the second radio resource is used for EPDCCH, the frequency range of the resource is pre-configured by RRC (Radio Resource Control, radio resource control) signaling, and occupies PDSCH (Physical Downlink Shared Channel, physical downlink) outside the PDCCH control domain in the time domain Link shared channel) OFDM symbol position in the data area, user data on the frequency domain and PDSCH are multiplexed by FDM (Frequency Division Multiplexing, frequency division multiplexing), and the specific amount of resources occupied is determined by the format and resources of the EPDCCH. The allocation information and other factors are determined. The manner of determining and using the second radio resource hereinafter is the same as the manner of determining and using the second radio resource in this embodiment, and details are not described below.

The second sending unit 132 is configured to send control signaling to the UE through the third radio resource of the unlicensed spectrum, where the third radio resource is determined by the control signaling indication information or pre-configuration, and the control signaling indication information is that the eNB provides the UE with the eNB in the eNB. It is sent on the second radio resource of the configured licensed spectrum.

In order to further avoid or reduce the occupation of the second radio resource by the UE and save the resources on the licensed spectrum, the eNB may also send a message to the UE through the third radio resource allocated for the UE when detecting that the unlicensed spectrum is available. Corresponding control signaling. At this time, in order for the UE to know which time slot and which frequency region to receive the control signaling, the eNB also needs to send the control signaling indication information to the UE on the second radio resource of the licensed spectrum in advance. The control signaling indication information It is used to indicate which time slot and from which frequency region the UE receives the control signaling; or, the eNB may pre-configure the time slot and resources for the UE to receive the control signaling, and the UE determines which time slot and which time slot is received according to the pre-configuration. A frequency region receives control signaling. The first radio resource is used for transmitting data on the unlicensed spectrum, and the third radio resource is used for transmitting control signaling on the unlicensed spectrum. The third radio resource can be used for PDCCH or EPDCCH, and the resource occupation method is the same as that of the second radio resource, except that the third radio resource is located in a part of the frequency range where the SCell is located. The manner of determining and using the third radio resource hereinafter is the same as the manner of determining and using the third radio resource in this embodiment, and details are not described below.

Optionally, the second sending unit 132 includes:

The first sending subunit 1321 is configured to send control signaling indication information to the UE through the second radio resource when the target device is an eNB, and then send control signaling to the UE through the third radio resource determined by the control signaling indication information, So that the UE receives the control signaling on the third radio resource determined by the control signaling indication information.

Specifically, the eNB may pre-allocate a third radio resource for sending control signaling to at least two UEs on the unlicensed spectrum, and add indication information for indicating the third radio resource to the control signaling indication information, through The second radio resource sends control signaling indication information to each UE respectively, and then sends control signaling corresponding to the UE to each UE on the third radio resource respectively, and the UE determines to receive the control signaling indication information according to the received control signaling Control the third radio resource of the signaling, and receive the control signaling on the determined third radio resource.

Optionally, the device further includes:

a signal detection module for detecting the signal quality of the unlicensed spectrum every predetermined time;

a first communication module, configured to instruct the UE to implement data transmission in a D2D communication mode when the result of detection by the signal detection module is that the signal quality of the unlicensed spectrum meets a preset condition;

The second communication module is configured to instruct the UE to use a cell communication mode to implement data transmission when the result detected by the signal detection module is that the signal quality of the unlicensed spectrum does not meet the preset condition, and the cell communication mode means that the UE performs data transmission through the eNB.

Whether the UE can transmit data in the D2D communication mode on the first radio resource depends not only on whether the unlicensed spectrum resource is available, but also on the signal quality of the unlicensed spectrum. Therefore, in order to avoid the poor signal quality of the unlicensed spectrum As a result of the problem of low communication efficiency between UEs, the eNB may detect the signal quality of the unlicensed spectrum every predetermined time or instruct the UE to detect the signal quality of the unlicensed spectrum every predetermined time. If the detection result is that the signal quality of the unlicensed spectrum meets the preset conditions, the eNB determines to continue to transmit data in the D2D communication mode; if the detection result is that the signal quality of the unlicensed spectrum does not meet the preset conditions, the eNB determines to use the cell communication mode for transmission. data, that is, the first UE sends the data to the eNB through the second radio resource, and the eNB forwards the received data to the second UE through the second radio resource; or the first UE sends the data to the eNB through the second radio resource, The eNB further sends the data to the core network and the application server, and the application server and the core network forward the data to the second UE through the eNB or other eNBs, so as to realize data transmission between the UEs.

It should be supplemented that when UEs use the cell communication mode for data transmission, the eNB may also detect the signal quality of the unlicensed spectrum every predetermined time, and when the detection result is that the signal quality of the unlicensed spectrum meets the preset conditions, The UE is instructed to use the D2D communication mode to implement data transmission; when the detection result is that the signal instruction of the unlicensed spectrum does not meet the preset condition, the UE is instructed to continue to implement the data transmission in the cell communication mode.

The preset condition may include at least one of: the unusable duration of the unlicensed spectrum is less than or equal to the first threshold and the duration of the wireless condition of the unlicensed spectrum less than the threshold is less than or equal to the second threshold. Of course, the preset conditions can also be modified, and this embodiment does not limit the preset conditions.

Optionally, the resource allocation module 110 includes:

The first allocation unit 111 is configured to determine the unlicensed spectrum in an available state if the target device is an eNB and there is no UE served by other eNBs in the UE, and select the unlicensed spectrum from the determined unlicensed spectrum. The first radio resource is used as the allocated first radio resource.

If the at least two UEs that use the D2D communication mode for data transmission are both served by the eNB, the eNB may directly allocate the first radio resources of the unlicensed spectrum to the at least two UEs. Specifically, the eNB may determine the unlicensed spectrum in an available state. For example, the eNB determines that the unlicensed spectrum in the frequency region of 5170-5190 MHz is available; the eNB selects the first unlicensed spectrum from the determined unlicensed spectrum. The radio resource is used as the allocated first radio resource. For example, the eNB selects a PRB in the frequency region of 5170-5172 MHz from 5170-5190 MHz as the first radio resource used by the UE.

Optionally, the resource allocation module 110 includes:

The third allocating unit 113 is configured to perform allocation negotiation with other eNBs if the target device is an eNB and there is at least one UE served by other eNBs in the UE, and allocate the unlicensed spectrum occupied by the negotiated eNB and other eNBs to the unlicensed spectrum. The first radio resource is used as the allocated first radio resource.

If at least one of the at least two UEs that use the D2D communication mode for data transmission is served by another eNB, the eNB also needs to negotiate with the other eNB when allocating the first radio resource of the unlicensed spectrum. The eNB serving as the target device refers to the eNB that provides the PCell and the SCell on the unlicensed spectrum for the UE, and the other eNBs refer to other eNBs that use at least the unlicensed spectrum. The eNB and other eNBs may be adjacent and provide different cells. For example, the first The eNB and the second eNB; or, the eNB and other eNBs may provide cells for carrier aggregation between base stations, eg, the primary eNB and the secondary eNB.

Specifically, the eNB adds the information of the radio resources that it can occupy into the negotiation information and sends it to other eNBs through the interface between the base stations such as the X2 interface, and the other eNBs determine the other eNB in the radio resources indicated by the negotiation information. The radio resource that can be occupied, and the determined radio resource is used as the first radio resource, and other eNBs then notify the eNB of the determined first radio resource.

Assuming that the eNB provides services to the first UE and other eNBs provide services to the second UE, the eNB sends control signaling to the first UE according to the determined third radio resources, and at the same time, other eNBs send control signaling to the second UE according to the determined third radio resources The UE sends the control signaling, and the first UE and the second UE use the D2D communication mode to perform data transmission on the first radio resource after receiving the control signaling.

It should be noted that the UE that uses the D2D communication mode to transmit data should be in the same discontinuous reception (DRX) state. For example, the first UE and the second UE are both in the active time (active time) to receive the control signaling. .

Optionally, the resource allocation module 110 includes:

the fifth allocating unit 115, configured to dynamically allocate the first radio resource of the unlicensed spectrum to the UE for each data transmission using the D2D communication mode; or,

In this embodiment, the HARQ (Hybrid Automatic Retransmission Request) technology can be used for data transmission between UEs, and the eNB can dynamically allocate the first wireless radio of unlicensed spectrum to at least two UEs during each new HARQ transmission. The resource allocation method is as described above, and will not be repeated here.

The HARQ feedback for data can be fed back through the fifth radio resource of the unlicensed spectrum or the sixth radio resource of the licensed spectrum. The fifth radio resource is used to transmit HARQ feedback on the unlicensed spectrum, and the sixth radio resource is used to transmit the HARQ feedback on the licensed spectrum. HARQ feedback is transmitted on the For example, using PUCCH (Physical Uplink Control Channel, Physical Uplink Control Channel) or PUSCH (Physical Uplink Shared Channel, Physical Uplink Shared Channel) of PCell for feedback or PUCCH or PUSCH on SCell for feedback, this embodiment does not limited.

When the HARQ feedback indicates that a certain new transmission data is lost, HARQ retransmission needs to be performed. The eNB may dynamically allocate the first radio resource of the unlicensed spectrum to at least two UEs during each HARQ retransmission. The allocation method is as described above, and will not be repeated here; The first radio resource allocated for HARQ retransmission or HARQ new transmission.

The sixth allocation unit 116 is configured to allocate the first radio resource of the unlicensed spectrum to the UE according to a pre-configured semi-static allocation strategy, where the semi-static allocation strategy is to allocate the first radio resource of the unlicensed spectrum to the unlicensed spectrum every time the unlicensed spectrum is available. resource allocation strategy.

In this embodiment, the eNB may allocate the first radio resource of the unlicensed spectrum to at least two UEs according to a pre-configured semi-static allocation policy every time the unlicensed spectrum is available, without the need for dynamic allocation for each new HARQ transmission the first radio resource. The allocation manner for allocating the first radio resource according to the semi-static allocation strategy is as described above, and details are not described here.

Specifically, the eNB may configure the period of the first radio resource for each UE through RRC signaling, and then send the semi-static allocation policy to each UE through the PDCCH or EPDCCH. Since data transmission on the SCell only takes place when unlicensed spectrum is available, the period only takes effect when unlicensed spectrum is available.

It should be added that if at least one of the at least two UEs using the D2D communication mode for data transmission is served by another eNB, and the eNB dynamically allocates the first radio resource or the eNB allocates the first radio resource according to the semi-static allocation policy. , the control signaling needs to be sent when the eNB and other eNBs jointly occupy the first radio resource, and the eNB and other eNBs respectively use the third radio resource to send the control signaling to the UE in the same time slot, and the frequency can be different, so that each time After receiving the control signaling, a UE transmits data from the first radio resource according to the time slot determined by the control signaling. If at least one of the at least two UEs using the D2D communication mode for data transmission is served by another eNB and the eNB allocates the first radio resource according to the semi-static allocation strategy, since the UE determines the data transmission according to the available time of the unlicensed spectrum Instead of control signaling, the control signaling may be sent when the eNB and other eNBs jointly occupy the first radio resource, or may not be sent when the eNB and other eNBs jointly occupy the first radio resource. For example, the eNB and other eNBs may send control signaling to the first UE and the second UE respectively at the same subframe position in different radio frames, so that the first UE and the second UE that transmit data in the D2D communication mode can communicate with the eNB and other eNBs. When the first wireless resource is jointly occupied, the first wireless resource may be used for data transmission. This embodiment does not limit the above two transmission manners of the control signaling.

To sum up, the device communication apparatus provided by the embodiment of the present invention allocates the first radio resource of the unlicensed spectrum to the UE when the unlicensed spectrum is available; generates a control corresponding to the UE according to the allocated first radio resource Signaling, the control signaling carries the indication information used to indicate the first radio resource; send control signaling to the UE, so that the UE implements data transmission in the D2D communication mode on the first radio resource determined according to the indication information, which can be The D2D communication mode is used for data transmission on the first radio resource of the unlicensed spectrum in the available state, without additionally allocating radio resources on the licensed spectrum to the UE, which solves the problem that the radio resources allocated by the eNB for the UE in the D2D communication mode are difficult to meet. The ever-increasing spectrum demand leads to the problem of low communication efficiency between UEs adopting the D2D communication mode, which achieves the effect of improving the communication efficiency between UEs adopting the D2D communication mode.

In addition, when the signal quality of the unlicensed spectrum does not meet the preset conditions, the UE is instructed to use the cell communication mode to realize data transmission, so that when the UE cannot directly send data to other UEs, the data can be sent to the eNB, and the eNB will send the data to the eNB. The received data is forwarded to other UEs to realize data transmission between UEs.

Please refer to FIG. 3 , which shows a structural framework diagram of a device communication apparatus provided by still another embodiment of the present invention. The device communication apparatus can be used in a master UE, and the UEs that are not declared to be the master UE in the embodiment are all slave UEs, and the master UE and the slave UE can be designated dynamically or through a semi-static allocation strategy. The device communication apparatus includes: a resource allocation module 110, a signaling generating module 120 and a signaling sending module 130;

The resource allocation module 110 is configured to allocate the first wireless resource of the unlicensed spectrum to the UE when the unlicensed spectrum is in an available state, where the unlicensed spectrum refers to the spectrum used by each wireless access system for competition;

In this embodiment, the eNB needs to configure a carrier for each of the master UE and the at least one slave UE respectively. Specifically, the eNB may configure the PCell in the frequency band of the licensed spectrum, and configure the SCell in the frequency band of the unlicensed spectrum, and send the carrier configuration information of each cell to the master UE and at least one slave UE.

After the carrier configuration is completed, the eNB needs to determine whether the unlicensed spectrum is available and whether the D2D communication mode can be used for data transmission between the master UE and at least one slave UE. Taking the master UE and the slave UE as an example, the eNB can deliver the measurement configuration to the master UE and the slave UE respectively, and the measurement configuration and the configuration carrier can be sent to the master UE and the slave UE using the same message or a different message. The master UE and the slave UE respectively send the measurement results obtained by the measurement to the eNB according to the measurement configuration, and the eNB determines whether the unlicensed spectrum is available and whether the master UE and the slave UE can use the D2D communication mode for data transmission according to the measurement results.

Specifically, taking the measurement configuration sent by the eNB to the master UE as an example, the measurement configuration instructs the master UE to perform spectrum sensing or spectrum detection on the unlicensed spectrum where the SCell is located, and add the detection result to the measurement report and send it to the eNB. The eNB determines whether the unlicensed spectrum is available according to the measurement result.

The available status of unlicensed spectrum includes at least two situations. One is that the unlicensed spectrum is in an idle state and is not occupied by other wireless access systems; And/or the UE is far away or the power is low, the eNB and the UE or between the master UE and the slave UE can still use the unlicensed spectrum for normal communication without causing serious interference to other wireless access systems.

In addition, the measurement configuration may also include the communication identifier, synchronization identifier, and discovery signal of the master UE, so that the master UE sends the discovery signal and the communication identifier when receiving the synchronization identifier, and the slave UE receives the master UE when receiving the synchronization identifier included in the measurement configuration. The discovery signal and communication identifier sent by the UE, and measure RSRP or CQI or path loss according to the synchronization signal and/or discovery signal, and add the communication identifier of the primary UE and other measured data to the measurement report and send it to the eNB. When it is clear that the distance between the master UE and the slave UE is short and the signal quality is good, it is determined that the master UE and the slave UE can transmit data in the D2D communication mode on the radio resources of the unlicensed spectrum.

After the master UE determines that the unlicensed spectrum is available and the D2D communication mode can be used to transmit data between the master UE and the slave UE, the master UE can allocate the first radio resource of the unlicensed spectrum to the slave UE.

a signaling generating module 120, configured to generate control signaling corresponding to the UE according to the first radio resource allocated by the resource allocation modulo 110 block, where the control signaling carries indication information for indicating the first radio resource;

In order to make the secondary UE specify the first radio resource of the unlicensed spectrum allocated by the secondary UE, the primary UE needs to obtain the indication information of the first radio resource, and add the indication information to the control signaling corresponding to the secondary UE and send it to the secondary UE . The indication information is used to indicate which time slot and which frequency region the UE sends or receives data in. The time slot in the present invention refers to the transmission time interval TTI, that is, a scheduling time unit. In LTE, one TTI corresponds to one subframe, occupies a time of 1 ms, and includes two time slots.

Since the slave UE can only perform a receiving operation or a sending operation at the same time when data is transmitted in the D2D communication mode, the master UE also needs to indicate the operation type of the slave UE in the control signaling. For example, when the master UE sends data and receives data from the slave UE, the control signaling corresponding to the slave UE is used to instruct the slave UE to receive data from a certain time slot and from a certain frequency region. Or preconfigure the master UE to send data in the first type of time slot, the slave UE to receive data in the first type of time slot, and the master UE to receive data in the second type of time slot, and the slave UE to send data in the second type of time slot, where the first The first type of time slot is different from the second type of time slot, they together form all the time slots or part of the time slot, then the master UE and the slave UE send and receive data according to the pre-configured time slot position, without the master UE through the control signaling Indicates the operation type from the UE.

The signaling sending module 130 is configured to send the control signaling generated by the signaling generating module 120 to the UE, so that the UE implements data transmission in the D2D communication mode on the first radio resource determined according to the indication information.

After the master UE sends the control signaling to the slave UE, the slave UE can determine which time slot and which frequency region to send or receive data from according to the indication information in the control signaling.

Optionally, the signaling sending module 130 includes:

a first sending unit 131, configured to send control signaling to the UE through the second radio resource of the licensed spectrum configured by the eNB for the UE; or,

In order to ensure that the slave UE can correctly receive the control signaling, so as to improve the reliability of transmission of the control signaling, the master UE may send the control signaling to the slave UE through the second radio resource of the licensed spectrum. In this embodiment, since the PCell is configured in the frequency band of the licensed spectrum, the master UE can send control signaling to the slave UE through the PDCCH, EPDCCH or PUCCH on the PCell.

The second sending unit 132 is configured to send control signaling to the UE through the third radio resource of the unlicensed spectrum, where the third radio resource is determined by the control signaling indication information or pre-configuration, and the control signaling indication information is that the eNB provides the UE with the eNB in the eNB. It is sent on the second radio resource of the configured licensed spectrum.

In order to further avoid or reduce the occupation of the second radio resource by the master UE and save the resources on the licensed spectrum, the master UE may also send the third radio resource allocated to the slave UE to the slave when detecting that the unlicensed spectrum is available. The UE sends control signaling corresponding to the slave UE. At this time, in order for the master UE to know which time slot and which frequency region to send the control signaling and which time slot and which frequency region the slave UE to receive the control signaling, the eNB needs to pre-register in the second part of the licensed spectrum. The control signaling indication information corresponding to the primary UE is sent to the primary UE on the radio resource, and the control signaling indication information is sent to the secondary UE on the second radio resource of the licensed spectrum. The control signaling indication information corresponding to the primary UE is used for Indicate which time slot and which frequency region the master UE receives control signaling from, and the control signaling indication information corresponding to the slave UE is used to indicate which time slot and which frequency region the slave UE receives control signaling from; or,

The eNB can pre-configure the time slots and resources for the master UE to send control signaling and the time slots and resources for receiving control signaling from the UE. The master UE determines which time slot and which frequency region to send the control signaling in according to the pre-configuration. , the slave UE determines in which time slot and which frequency region the control signaling is received from according to the pre-configuration. The first radio resource is used for transmitting data on the unlicensed spectrum, and the third radio resource is used for transmitting control signaling on the unlicensed spectrum.

Optionally, the second sending unit 132 includes:

The second sending subunit 1322 is configured to, when the target device is the master UE sending the control signaling, determine that the UE receiving the control signaling is the slave UE, receive the control signaling indication information sent by the eNB on the second radio resource, and then The control signaling is sent to the secondary UE through the third radio resource determined by the control signaling indication information, so that the secondary UE receives control signaling on the third radio resource determined by the control signaling indication information.

Specifically, the eNB may pre-allocate the master UE and at least one slave UE on the unlicensed spectrum with a third radio resource for sending control signaling, and add the indication information for indicating the third radio resource to corresponding to the master UE respectively. In the control signaling indication information and the control signaling indication information corresponding to the secondary UE, the control signaling indication information corresponding to the primary UE is sent to the primary UE through the second radio resource, and the control signaling indication information corresponding to the primary UE is sent to the secondary UE through the second radio resource. The control signaling indication information corresponding to the UE, the master UE sends the control signaling corresponding to the secondary UE to each secondary UE on the third radio resource indicated by the control signaling indication information, and each secondary UE receives the control signaling according to the control signaling information. The indication information is used to determine the third radio resource for receiving the control signaling, and the control signaling is received on the determined third radio resource.

Optionally, the device further includes:

a signal detection module for detecting the signal quality of the unlicensed spectrum every predetermined time;

a first communication module, configured to instruct the UE to implement data transmission in a D2D communication mode when the result of detection by the signal detection module is that the signal quality of the unlicensed spectrum meets a preset condition;

The second communication module is configured to instruct the UE to use a cell communication mode to implement data transmission when the result detected by the signal detection module is that the signal quality of the unlicensed spectrum does not meet the preset condition, and the cell communication mode means that the UE performs data transmission through the eNB.

Since whether the master UE and at least one slave UE can transmit data in the D2D communication mode on the first radio resource depends not only on whether the unlicensed spectrum resource is available, but also on the signal quality of the unlicensed spectrum, in order to avoid unlicensed spectrum The poor signal quality of the spectrum leads to the problem of inefficient communication between the master UE and at least one slave UE. The eNB can detect the signal quality of the unlicensed spectrum every predetermined time or instruct the master UE or the slave UE to detect the unlicensed spectrum every predetermined time. Signal quality of licensed spectrum.

If the detection result is that the signal quality of the unlicensed spectrum meets the preset conditions, the master UE determines to continue to use the D2D communication mode to transmit data; if the detection result is that the signal quality of the unlicensed spectrum does not meet the preset conditions, the master UE determines to use cell communication Mode of data transmission, that is, the master UE sends the data to the eNB through the second radio resource, and the eNB forwards the received data to the slave UE through the second radio resource; or the master UE sends the data to the eNB through the second radio resource, and the eNB The data is further sent to the core network and the application server, and the application server and the core network forward it to the slave UE through the eNB or other eNBs, so as to realize data transmission between the master UE and at least one slave UE.

It should be supplemented that when data transmission is performed between the master UE and at least one slave UE in the cell communication mode, the eNB or the master UE or the slave UE may also detect the signal quality of the unlicensed spectrum at predetermined time intervals, and the detection result is When the signal quality of the unlicensed spectrum meets the preset condition, instruct the master UE and at least one slave UE to implement data transmission in the D2D communication mode; when the detection result is that the signal instruction of the unlicensed spectrum does not meet the preset condition, instruct the master UE and at least one slave UE to implement data transmission in the D2D communication mode; A slave UE continues to use the cell communication mode to realize data transmission.

The preset condition may include at least one of: the unusable duration of the unlicensed spectrum is less than or equal to the first threshold and the duration of the wireless condition of the unlicensed spectrum less than the threshold is less than or equal to the second threshold. Of course, the preset conditions can also be modified, and this embodiment does not limit the preset conditions.

Optionally, if the target device is the master UE and the D2D communication mode is broadcast or multicast, the apparatus further includes:

The data dissemination module 140 is used for sending data to at least one slave UE on the first radio resource by broadcasting or multicasting after the signaling sending module 130 sends the control signaling to the UE;

The data sending module 150 is configured to send data to the slave UE again on the second radio resource of the authorized spectrum if there is a slave UE that has not received the data propagated by the data propagation module 140 .

In this embodiment, when there is one slave UE, the master UE may send data to the slave UE on the first radio resource in a unicast manner, so as to implement data transmission in a D2D communication mode. Or, when there is at least one slave UE, the master UE may send data to the at least one slave UE on the first radio resource in a broadcast or multicast manner, and the slave UE feeds back the data reception status. If there is a slave UE that has not received data, the master UE determines that it cannot send data to the slave UE through the first radio resource, and sends data to the slave UE again through the fourth radio resource of the authorized spectrum. The fourth radio resource is used for Transmission of data on licensed spectrum. Alternatively, the master UE may also determine whether the slave UE has received data by detecting the signal quality of the unlicensed spectrum, and this embodiment does not limit the manner of determining the slave UE that has not received data.

It needs to be supplemented that the manner in which the master UE sends data to the slave UE is determined by control signaling. For example, if the indication information of the control signaling includes a C-RNTI (Cell Radio Network TemporaryIdentifier, Cell-Radio Network TemporaryIdentifier) or D2D-RNTI (D2D Radio Network TemporaryIdentifier, D2D-Radio Network Temporary Identifier) of a single slave UE, Then instruct the master UE to send data to the slave UE on the first radio resource in a unicast manner; if the indication information of the control signaling includes Group RNTI (Group Radio Network Temporary Identifier, group radio network temporary identifier), then instruct the master UE to pass The data is sent to the slave UE on the first radio resource in a broadcast or multicast manner.

Further, the eNB may send the control signaling indication information corresponding to the master UE to the master UE and send the control signaling indication information corresponding to the slave UE to at least one slave UE through broadcast or multicast, and the master UE broadcasts or multicasts the control signaling indication information corresponding to the slave UE. The method sends control signaling corresponding to the slave UE to at least one slave UE.

Optionally, the resource allocation module 110 includes:

The second allocating unit 112 is configured to receive the unlicensed spectrum resource pool allocated by the eNB if the target device is the master UE and there is no slave UE served by other eNBs in the slave UE, and the unlicensed spectrum resource pool includes the available For the unlicensed spectrum, the first radio resource of the unlicensed spectrum selected from the unlicensed spectrum resource pool is used as the allocated first radio resource.

If each slave UE that uses the D2D communication mode for data transmission is served by the eNB, the master UE may directly allocate the first radio resource of the unlicensed spectrum to each slave UE. Specifically, the eNB may determine the unlicensed spectrum in an available state. For example, the eNB determines that the unlicensed spectrum in the frequency region of 5170-5190 MHz is available; the eNB then determines the unlicensed spectrum resource pool in the available unlicensed spectrum, Allocate the determined unlicensed spectrum resource pool to the master UE. For example, the unlicensed spectrum resource pool is a radio resource with a frequency range of 5170-5175 MHz; the master UE receives the unlicensed spectrum resource pool allocated by the eNB, and assigns the determined unlicensed spectrum to the master UE. The first radio resource of the unlicensed spectrum selected from the resource pool is used as the allocated first radio resource. For example, the master UE selects a PRB in the frequency region of 5170-5172MHz from 5170-5175MHz as the first radio resource for the UE to use. The frequency resources used for D2D communication may also be discontinuous, and the master UE for different D2D communication may select PRBs in different frequency regions in 5170-5190 MHz.

Optionally, the resource allocation module 110 includes:

The fourth allocating unit 114 is configured to receive the unlicensed spectrum resource pool sent by the eNB serving the master UE if the target device is the master UE and there is at least one slave UE served by other eNBs in the slave UE, and the unlicensed spectrum The resource pool is determined to be jointly occupied by the eNB and other eNBs after the allocation negotiation, and the first radio resource of the unlicensed spectrum selected from the unlicensed spectrum resource pool is used as the allocated first radio resource.

If there is at least one UE served by another eNB among the secondary UEs that use the D2D communication mode for data transmission, the eNB also needs to negotiate with the other eNB when allocating the unlicensed spectrum resource pool. Among them, eNB refers to the eNB that provides PCell and SCell on unlicensed spectrum for the main UE, other eNB refers to other eNBs that use at least unlicensed spectrum, eNB and other eNBs can be adjacent and provide different cells, for example, the first eNB and the second Two eNBs; or, an eNB and other eNBs may provide cells for carrier aggregation between base stations, such as a primary eNB and a secondary eNB.

Specifically, the eNB adds the information of the radio resources that it can occupy into the negotiation information and sends it to other eNBs through the interface between the base stations such as the X2 interface, and the other eNBs determine the other eNB in the radio resources indicated by the negotiation information. The radio resources that can be occupied, and the jointly occupied radio resources are determined as the unlicensed spectrum resource pool, and other eNBs then notify the eNB of the determined unlicensed spectrum resource pool. The eNB allocates the determined unlicensed spectrum resource pool to the master UE, and the master UE selects the first radio resource of the unlicensed spectrum from the unlicensed spectrum resource pool as the allocated first radio resource.

Assuming that the eNB provides services to the master UE and other eNBs provide services to the slave UEs, the eNB allocates the determined unlicensed spectrum resource pool to the master UE, and the other eNBs allocate the determined unlicensed spectrum resource pool to the slave UE. Select the first radio resource from the authorized spectrum resource pool, generate control signaling corresponding to the slave UE according to the first radio resource, send the control signaling to the slave UE, and after the slave UE receives the control signaling, generate the control signaling in the first radio resource The D2D communication mode is used for data transmission with the primary UE.

It should be noted that the master UE and the slave UE that use the D2D communication mode to transmit data should be in the same discontinuous reception DRX state, for example, the master UE and the slave UE can transmit control signaling only during the active time.

Optionally, the resource allocation module 110 includes:

the fifth allocating unit 115, configured to dynamically allocate the first radio resource of the unlicensed spectrum to the UE for each data transmission using the D2D communication mode; or,

In this embodiment, the HARQ technology can be used for data transmission between the master UE and at least one slave UE, then the master UE can dynamically allocate the first radio resource of the unlicensed spectrum to the at least one slave UE during each new HARQ transmission, and allocate the first radio resource of the unlicensed spectrum to the at least one slave UE. The method is as described above and will not be repeated here.

The HARQ feedback for data can be fed back through the fifth radio resource of the unlicensed spectrum or the sixth radio resource of the licensed spectrum. The fifth radio resource is used to transmit HARQ feedback on the unlicensed spectrum, and the sixth radio resource is used to transmit the HARQ feedback on the licensed spectrum. HARQ feedback is transmitted on the For example, the PUCCH or PUSCH of the PCell is used for feedback or the PUCCH or PUSCH on the SCell is used for feedback, which is not limited in this embodiment.

When the HARQ feedback indicates that a certain new transmission data is lost, HARQ retransmission needs to be performed. The master UE can dynamically allocate the first radio resource of the unlicensed spectrum to at least two UEs during each HARQ retransmission. The first radio resource allocated during the last HARQ retransmission or new HARQ transmission.

The sixth allocation unit 116 is configured to allocate the first radio resource of the unlicensed spectrum to the UE according to a pre-configured semi-static allocation strategy, where the semi-static allocation strategy is to allocate the first radio resource of the unlicensed spectrum to the unlicensed spectrum every time the unlicensed spectrum is available. resource allocation strategy.

In this embodiment, the master UE can allocate the first radio resource of the unlicensed spectrum to at least one slave UE according to a pre-configured semi-static allocation policy every time the unlicensed spectrum is available, without dynamically updating the HARQ transmission every time. A first radio resource is allocated. The allocation manner for allocating the first radio resource according to the semi-static allocation strategy is as described above, and details are not described here.

Specifically, the master UE may configure the period of the first radio resource for each slave UE through RRC signaling, and then send the semi-static allocation policy to each slave UE through PDCCH or EPDCCH. Since data transmission on the SCell only takes place when unlicensed spectrum is available, the period only takes effect when unlicensed spectrum is available.

It should be added that, if there is at least one slave UE that is served by other eNBs among the slave UEs that use the D2D communication mode for data transmission, and the master UE dynamically allocates the first radio resource or the eNB allocates the first radio resource according to the semi-static allocation strategy. , the control signaling needs to be sent when the eNB and other eNBs jointly occupy the first radio resource, and the eNB and other eNBs each use the third radio resource to send the control signaling to the master UE and the slave UE in the same time slot, and the frequency can be different, so that after receiving the control signaling, each slave UE transmits data from the first radio resource according to the time slot determined by the control signaling.

If there is at least one slave UE that uses the D2D communication mode for data transmission to be served by other eNBs and the master UE allocates the first radio resource according to the semi-static allocation strategy, since the slave UE determines the data transmission according to the available time of the unlicensed spectrum Instead of control signaling, the control signaling may be sent when the eNB and other eNBs jointly occupy the first radio resource, or may not be sent when the eNB and other eNBs jointly occupy the first radio resource. For example, the eNB and other eNBs can send control signaling to the master UE and the slave UE respectively at the same subframe position in different radio frames, so that the master UE and the slave UE that transmit data in the D2D communication mode jointly occupy the first position in the eNB and other eNBs. When the wireless resource is used, the first wireless resource can be used for data transmission. This embodiment does not limit the above two transmission manners of the control signaling.

To sum up, the device communication apparatus provided by the embodiment of the present invention allocates the first radio resource of the unlicensed spectrum to the UE when the unlicensed spectrum is available; generates a control corresponding to the UE according to the allocated first radio resource Signaling, the control signaling carries the indication information used to indicate the first radio resource; send control signaling to the UE, so that the UE implements data transmission in the D2D communication mode on the first radio resource determined according to the indication information, which can be The D2D communication mode is used for data transmission on the first radio resource of the unlicensed spectrum in the available state, without additionally allocating radio resources on the licensed spectrum to the UE, which solves the problem that the radio resources allocated by the eNB for the UE in the D2D communication mode are difficult to meet. The ever-increasing spectrum demand leads to the problem of low communication efficiency between UEs adopting the D2D communication mode, which achieves the effect of improving the communication efficiency between UEs adopting the D2D communication mode.

In addition, when the signal quality of the unlicensed spectrum does not meet the preset conditions, the UE is instructed to use the cell communication mode to realize data transmission, so that when the UE cannot directly send data to other UEs, the data can be sent to the eNB, and the eNB will send the data to the eNB. The received data is forwarded to other UEs to realize data transmission between UEs.

Please refer to FIG. 4 , which shows a structural framework diagram of a device communication apparatus provided by another embodiment of the present invention. The device communication apparatus can be used in a target device, including: a processor 410 , a transmitter 420 and a memory 440 . Processor 410 is coupled to transmitter 420, which is coupled to memory 430.

A computer program is stored in the memory 430, and the processor 410 can perform the following operations by accessing the computer program:

The processor 410 is configured to allocate a first radio resource of an unlicensed spectrum to the UE when the unlicensed spectrum is in an available state, where the unlicensed spectrum refers to a spectrum used by each wireless access system for competition; according to the allocated first radio resource The resource generates control signaling corresponding to the UE, where the control signaling carries indication information for indicating the first radio resource;

After determining that the unlicensed spectrum is available, the target device can allocate the first radio resource of the unlicensed spectrum to the UE. For example, if the unlicensed spectrum in the frequency region 5170-5190MHz is available, the target device can select the PRB in the 5170-5175MHz frequency region from 5170-5190MHz for data transmission in the D2D communication mode, and then use the 5170-5175MHz frequency to realize data transmission. The PRB in the 5170-5172MHz frequency region is selected from the PRBs in the region as the first radio resource for the UE; Radio resources, the frequency resources used for D2D communication can also be discontinuous. For different D2D communication UEs can select PRBs in different frequency regions in the 5170-5190 MHz range. This embodiment does not limit the allocation of the first radio resources allocated by the target device. The method does not limit whether the D2D communication uses the uplink resources of the cell or the downlink resources.

The available status of unlicensed spectrum includes at least two situations. One is that the unlicensed spectrum is in an idle state and is not occupied by other wireless access systems; And/or the UE is far away or the power is low, the eNB and the UE or between the UE and the UE can still use the unlicensed spectrum for normal communication without causing serious interference to other wireless access systems.

In order for the UE to specify the first radio resource of the unlicensed spectrum allocated to the UE, the target device needs to obtain the indication information of the first radio resource, and add the indication information to the control signaling and send it to the UE. The indication information is used to indicate which time slot and which frequency region the UE transmits or receives data in. In this embodiment, a time slot refers to a transmission time interval TTI, that is, a scheduling time unit. In LTE, one TTI corresponds to one subframe, occupies a time of 1 ms, and includes two time slots.

The transmitter 420 is configured to send the control signaling generated by the processor 410 to the UE, so that the UE implements data transmission in the D2D communication mode on the first radio resource determined according to the indication information.

After the target device sends the control signaling to the UE, the UE can determine which time slot and which frequency region to send or receive data in according to the indication information in the control signaling.

To sum up, the device communication apparatus provided by the embodiment of the present invention allocates the first radio resource of the unlicensed spectrum to the UE when the unlicensed spectrum is available; generates a control corresponding to the UE according to the allocated first radio resource Signaling, the control signaling carries the indication information used to indicate the first radio resource; send control signaling to the UE, so that the UE implements data transmission in the D2D communication mode on the first radio resource determined according to the indication information, which can be The D2D communication mode is used for data transmission on the first radio resource of the unlicensed spectrum in the available state, without additionally allocating radio resources on the licensed spectrum to the UE, which solves the problem that the radio resources allocated by the eNB for the UE in the D2D communication mode are difficult to meet. The ever-increasing spectrum demand leads to the problem of low communication efficiency between UEs adopting the D2D communication mode, which achieves the effect of improving the communication efficiency between UEs adopting the D2D communication mode.

Another embodiment of the present invention provides a device communication apparatus. The device communication apparatus can be used in a target device. This embodiment is described by taking the target device as an eNB in a cellular network as an example, and the eNB may be a micro base station or a small cell. Base stations or macro base stations, usually the above-mentioned different types of base stations have different transmit power and coverage. The device communication apparatus may include: a processor 410 , a transmitter 420 and a memory 440 . Transmitter 420 is coupled to processor 410 , which is coupled to memory 430 .

A computer program is stored in the memory 430, and the processor 410 can perform the following operations by accessing the computer program:

The processor 410 is configured to allocate a first radio resource of an unlicensed spectrum to the UE when the unlicensed spectrum is in an available state, where the unlicensed spectrum refers to a spectrum used by each wireless access system for competition; according to the allocated first radio resource The resource generates control signaling corresponding to the UE, where the control signaling carries indication information for indicating the first radio resource;

In this embodiment, the eNB needs to configure a carrier for each of the at least two UEs respectively. Specifically, the eNB may configure the PCell in the frequency band of the licensed spectrum, and configure the SCell in the frequency band of the unlicensed spectrum, and send the carrier configuration information of each cell to the UE. After the carrier configuration is completed, the eNB needs to determine whether the unlicensed spectrum is available and whether the D2D communication mode can be used for data transmission between at least two UEs.

The available status of unlicensed spectrum includes at least two situations. One is that the unlicensed spectrum is in an idle state and is not occupied by other wireless access systems; And/or the UE is far away or the power is low, the eNB and the UE or between the UE and the UE can still use the unlicensed spectrum for normal communication without causing serious interference to other wireless access systems.

After determining that the unlicensed spectrum is available and the D2D communication mode can be used to transmit data between at least two UEs, the eNB can allocate the first radio resource of the unlicensed spectrum to the UE. In order for the UE to specify the first radio resource of the unlicensed spectrum allocated to the UE, the eNB needs to acquire the indication information of the first radio resource, and add the indication information to the control signaling corresponding to the UE and send it to the UE. The indication information is used to indicate which time slot and which frequency region the UE transmits or receives data in.

Since the UE can only perform a receiving operation or a sending operation at the same time when data is transmitted in the D2D communication mode, the eNB also needs to indicate the operation type of the UE in the control signaling. For example, when the first UE sends data and the second UE receives data, the control signaling corresponding to the first UE is used to instruct the first UE to send data from a certain frequency region in a certain time slot, and the control signaling corresponding to the second UE is used to instruct the first UE to send data from a certain frequency region in a certain time slot. The control signaling is used to instruct the second UE to receive data from a certain frequency region in a certain time slot. Or pre-configure the first UE to send data in the first type of time slot, the second UE to receive data in the first type of time slot, and the first UE to receive data in the second type of time slot, and the second UE to send data in the second type of time slot data, in which the first type of subframe and the second type of time slot are different, and they together form all or part of the time slot, then the first UE and the second UE send and receive data according to the pre-configured time slot position, without using The eNB indicates the operation type of the UE through control signaling.

The transmitter 420 is configured to send the control signaling generated by the processor 410 to the UE, so that the UE implements data transmission in the D2D communication mode on the first radio resource determined according to the indication information.

After the eNB sends the control signaling to the UE, the UE can determine which time slot and which frequency region to send or receive data in according to the indication information in the control signaling.

Optionally, the transmitter 420 is specifically configured to send control signaling to the UE through the second radio resource of the licensed spectrum configured by the eNB for the UE; or, to send the control signaling to the UE through the third radio resource of the unlicensed spectrum. The three radio resources are determined by control signaling indication information or pre-configuration, and the control signaling indication information is sent by the eNB on the second radio resource of the authorized spectrum configured by the eNB for the UE.

In order to ensure that the UE can correctly receive the control signaling, so as to improve the reliability of transmitting the control signaling, the eNB may configure the second radio resource of the licensed spectrum for sending the control signaling. In this embodiment, since the PCell is configured in the frequency band of the licensed spectrum, the eNB can send control signaling to the UE through the PDCCH or EPDCCH on the PCell. or,

In order to further avoid or reduce the occupation of the second radio resource by the UE and save the resources on the licensed spectrum, the eNB may also send a message to the UE through the third radio resource allocated for the UE when detecting that the unlicensed spectrum is available. Corresponding control signaling. At this time, in order for the UE to know which time slot and which frequency region to receive the control signaling, the eNB also needs to send the control signaling indication information to the UE on the second radio resource of the licensed spectrum in advance. The control signaling indication information It is used to indicate which time slot and from which frequency region the UE receives the control signaling; or, the eNB may pre-configure the time slot and resources for the UE to receive the control signaling, and the UE determines which time slot and which time slot is received according to the pre-configuration. A frequency region receives control signaling. The first radio resource is used for transmitting data on the unlicensed spectrum, and the third radio resource is used for transmitting control signaling on the unlicensed spectrum.

Optionally, the processor 410 is specifically configured to, when the target device is an eNB, send control signaling indication information to the UE through the second radio resource, and then send the control signaling information to the UE through the third radio resource determined by the control signaling indication information. command, so that the UE receives control signaling on the third radio resource determined by the control signaling indication information.

Specifically, the eNB may pre-allocate a third radio resource for sending control signaling to at least two UEs on the unlicensed spectrum, and add indication information for indicating the third radio resource to the control signaling indication information, through The second radio resource sends control signaling indication information to each UE respectively, and then sends control signaling corresponding to the UE to each UE on the third radio resource respectively, and the UE determines to receive the control signaling indication information according to the received control signaling Control the third radio resource of the signaling, and receive the control signaling on the determined third radio resource.

Optionally, the processor 410 is further configured to detect the signal quality of the unlicensed spectrum every predetermined time; if the detection result is that the signal quality of the unlicensed spectrum meets the preset condition, the UE is instructed to use the D2D communication mode to implement data transmission; if If the detection result is that the signal quality of the unlicensed spectrum does not meet the preset condition, the UE is instructed to use the cell communication mode to implement data transmission, and the cell communication mode means that the UE performs data transmission through the eNB.

Whether the UE can transmit data in the D2D communication mode on the first radio resource depends not only on whether the unlicensed spectrum resource is available, but also on the signal quality of the unlicensed spectrum. Therefore, in order to avoid the poor signal quality of the unlicensed spectrum As a result of the problem of low communication efficiency between UEs, the eNB may detect the signal quality of the unlicensed spectrum every predetermined time or instruct the UE to detect the signal quality of the unlicensed spectrum every predetermined time.

If the detection result is that the signal quality of the unlicensed spectrum meets the preset conditions, the eNB determines to continue to transmit data in the D2D communication mode; if the detection result is that the signal quality of the unlicensed spectrum does not meet the preset conditions, the eNB determines to use the cell communication mode for transmission. data, that is, the first UE sends the data to the eNB through the second radio resource, and the eNB forwards the received data to the second UE through the second radio resource; or the first UE sends the data to the eNB through the second radio resource, The eNB further sends the data to the core network and the application server, and the application server and the core network forward the data to the second UE through the eNB or other eNBs, so as to realize data transmission between the UEs.

The preset condition may include at least one of: the unusable duration of the unlicensed spectrum is less than or equal to the first threshold and the duration of the wireless condition of the unlicensed spectrum less than the threshold is less than or equal to the second threshold. Of course, the preset conditions can also be modified, and this embodiment does not limit the preset conditions.

Optionally, the processor 410 is specifically configured to determine the unlicensed spectrum in an available state if the target device is an eNB and there is no UE served by other eNBs in the UE, and select the unlicensed spectrum from the determined unlicensed spectrum. The first radio resource of the unlicensed spectrum is used as the allocated first radio resource.

If the at least two UEs that use the D2D communication mode for data transmission are both served by the eNB, the eNB may directly allocate the first radio resources of the unlicensed spectrum to the at least two UEs. Specifically, the eNB may determine the unlicensed spectrum in an available state. For example, the eNB determines that the unlicensed spectrum in the frequency region of 5170-5190 MHz is available; the eNB selects the first unlicensed spectrum from the determined unlicensed spectrum. The radio resource is used as the allocated first radio resource. For example, the eNB selects a PRB in the frequency region of 5170-5172 MHz from 5170-5190 MHz as the first radio resource used by the UE.

Optionally, the processor 410 is specifically configured to perform allocation negotiation with other eNBs if the target device is an eNB and there is at least one UE served by other eNBs in the UE, and use the negotiated eNB and other eNBs to jointly occupy the non- The first radio resource of the licensed spectrum is used as the allocated first radio resource.

If at least one of the at least two UEs that use the D2D communication mode for data transmission is served by another eNB, the eNB also needs to negotiate with the other eNB when allocating the first radio resource of the unlicensed spectrum. Specifically, the eNB adds the information of the radio resources that it can occupy into the negotiation information and sends it to other eNBs through the interface between the base stations such as the X2 interface, and the other eNBs determine the other eNB in the radio resources indicated by the negotiation information. The radio resource that can be occupied, and the determined radio resource is used as the first radio resource, and other eNBs then notify the eNB of the determined first radio resource.

Optionally, the processor 410 is specifically configured to dynamically allocate the first radio resource of the unlicensed spectrum to the UE for each data transmission using the D2D communication mode; or, allocate the unlicensed spectrum to the UE according to a preconfigured semi-static allocation policy. For the first radio resource of the spectrum, the semi-static allocation strategy is an allocation strategy for the first radio resource of the unlicensed spectrum every time the unlicensed spectrum is available.

In this embodiment, the HARQ technology can be used for data transmission between UEs, and the eNB can dynamically allocate the first radio resource of the unlicensed spectrum to at least two UEs during each new HARQ transmission. The allocation method is as described above, here I won't go into details. The HARQ feedback for data can be fed back through the fifth radio resource of the unlicensed spectrum or the sixth radio resource of the licensed spectrum. The fifth radio resource is used to transmit HARQ feedback on the unlicensed spectrum, and the sixth radio resource is used to transmit the HARQ feedback on the licensed spectrum. HARQ feedback is transmitted on the For example, the PUCCH or PUSCH of the PCell is used for feedback or the PUCCH or PUSCH on the SCell is used for feedback, which is not limited in this embodiment.

In this embodiment, the eNB may allocate the first radio resource of the unlicensed spectrum to at least two UEs according to a pre-configured semi-static allocation policy every time the unlicensed spectrum is available, without the need for dynamic allocation for each new HARQ transmission the first radio resource. The allocation manner for allocating the first radio resource according to the semi-static allocation strategy is as described above, and details are not described here. Specifically, the eNB may configure the period of the first radio resource for each UE through RRC signaling, and then send the semi-static allocation policy to each UE through the PDCCH or EPDCCH. Since data transmission on the SCell only takes place when unlicensed spectrum is available, the period only takes effect when unlicensed spectrum is available.

It should be added that if at least one of the at least two UEs using the D2D communication mode for data transmission is served by another eNB, and the eNB dynamically allocates the first radio resource or the eNB allocates the first radio resource according to the semi-static allocation policy. , the control signaling needs to be sent when the eNB and other eNBs jointly occupy the first radio resource, and the eNB and other eNBs respectively use the third radio resource to send the control signaling to the UE in the same time slot, and the frequency can be different, so that each time After receiving the control signaling, a UE transmits data from the first radio resource according to the time slot determined by the control signaling.

If at least one of the at least two UEs using the D2D communication mode for data transmission is served by another eNB and the eNB allocates the first radio resource according to the semi-static allocation strategy, since the UE determines the data transmission according to the available time of the unlicensed spectrum Instead of control signaling, the control signaling may be sent when the eNB and other eNBs jointly occupy the first radio resource, or may not be sent when the eNB and other eNBs jointly occupy the first radio resource. For example, the eNB and other eNBs may send control signaling to the first UE and the second UE respectively at the same subframe position in different radio frames, so that the first UE and the second UE that transmit data in the D2D communication mode can communicate with the eNB and other eNBs. When the first wireless resource is jointly occupied, the first wireless resource may be used for data transmission. This embodiment does not limit the above two transmission manners of the control signaling.

To sum up, the device communication apparatus provided by the embodiment of the present invention allocates the first radio resource of the unlicensed spectrum to the UE when the unlicensed spectrum is available; generates a control corresponding to the UE according to the allocated first radio resource Signaling, the control signaling carries the indication information used to indicate the first radio resource; send control signaling to the UE, so that the UE implements data transmission in the D2D communication mode on the first radio resource determined according to the indication information, which can be The D2D communication mode is used for data transmission on the first radio resource of the unlicensed spectrum in the available state, without additionally allocating radio resources on the licensed spectrum to the UE, which solves the problem that the radio resources allocated by the eNB for the UE in the D2D communication mode are difficult to meet. The ever-increasing spectrum demand leads to the problem of low communication efficiency between UEs adopting the D2D communication mode, which achieves the effect of improving the communication efficiency between UEs adopting the D2D communication mode.

In addition, when the signal quality of the unlicensed spectrum does not meet the preset conditions, the UE is instructed to use the cell communication mode to realize data transmission, so that when the UE cannot directly send data to other UEs, the data can be sent to the eNB, and the eNB will send the data to the eNB. The received data is forwarded to other UEs to realize data transmission between UEs.

Another embodiment of the present invention provides a device communication apparatus. The device communication apparatus can be used in a master UE. The UEs that are not declared to be the master UE in the embodiment are all slave UEs, and the master UE and the slave UE can dynamically communicate with each other. Specified or specified via a semi-static allocation strategy. The device communication apparatus may include: a processor 410 , a transmitter 420 and a memory 440 . Transmitter 420 is coupled to processor 410 , which is coupled to memory 430 .

A computer program is stored in the memory 430, and the processor 410 can perform the following operations by accessing the computer program:

The processor 410 is configured to allocate a first radio resource of an unlicensed spectrum to the UE when the unlicensed spectrum is in an available state, where the unlicensed spectrum refers to a spectrum used by each wireless access system for competition; according to the allocated first radio resource The resource generates control signaling corresponding to the UE, where the control signaling carries indication information for indicating the first radio resource;

In this embodiment, the eNB needs to configure a carrier for each of the master UE and the at least one slave UE respectively. Specifically, the eNB may configure the PCell in the frequency band of the licensed spectrum, and configure the SCell in the frequency band of the unlicensed spectrum, and send the carrier configuration information of each cell to the master UE and at least one slave UE. After the carrier configuration is completed, the eNB needs to determine whether the unlicensed spectrum is available and whether the D2D communication mode can be used for data transmission between the master UE and at least one slave UE.

The available status of unlicensed spectrum includes at least two situations. One is that the unlicensed spectrum is in an idle state and is not occupied by other wireless access systems; And/or the UE is far away or the power is low, the eNB and the UE or between the master UE and the slave UE can still use the unlicensed spectrum for normal communication without causing serious interference to other wireless access systems.

After the master UE determines that the unlicensed spectrum is available and the D2D communication mode can be used to transmit data between the master UE and the slave UE, the master UE can allocate the first radio resource of the unlicensed spectrum to the slave UE. In order to make the secondary UE specify the first radio resource of the unlicensed spectrum allocated by the secondary UE, the primary UE needs to obtain the indication information of the first radio resource, and add the indication information to the control signaling corresponding to the secondary UE and send it to the secondary UE . The indication information is used to indicate which time slot and which frequency region the UE sends or receives data in.

Since the slave UE can only perform a receiving operation or a sending operation at the same time when data is transmitted in the D2D communication mode, the master UE also needs to indicate the operation type of the slave UE in the control signaling. For example, when the master UE sends data and receives data from the slave UE, the control signaling corresponding to the slave UE is used to instruct the slave UE to receive data from a certain time slot and from a certain frequency region. Or preconfigure the master UE to send data in the first type of time slot, the slave UE to receive data in the first type of time slot, and the master UE to receive data in the second type of time slot, and the slave UE to send data in the second type of time slot, where the first The first type of time slot is different from the second type of time slot, they together form all the time slots or part of the time slot, then the master UE and the slave UE send and receive data according to the pre-configured time slot position, without the master UE through the control signaling Indicates the operation type from the UE.

The transmitter 420 is configured to send the control signaling generated by the processor 410 to the UE, so that the UE implements data transmission in the D2D communication mode on the first radio resource determined according to the indication information.

After the master UE sends the control signaling to the slave UE, the slave UE can determine which time slot and which frequency region to send or receive data from according to the indication information in the control signaling.

Optionally, the transmitter 420 is specifically configured to send control signaling to the UE through the second radio resource of the licensed spectrum configured by the eNB for the UE; or, to send the control signaling to the UE through the third radio resource of the unlicensed spectrum. The three radio resources are determined by control signaling indication information or pre-configuration, and the control signaling indication information is sent by the eNB on the second radio resource of the authorized spectrum configured by the eNB for the UE.

In order to ensure that the slave UE can correctly receive the control signaling, so as to improve the reliability of transmission of the control signaling, the master UE may send the control signaling to the slave UE through the second radio resource of the licensed spectrum. In this embodiment, since the PCell is configured in the frequency band of the licensed spectrum, the master UE can send control signaling to the slave UE through the PDCCH, EPDCCH or PUCCH on the PCell. or,

In order to further avoid or reduce the occupation of the second radio resource by the master UE and save the resources on the licensed spectrum, the master UE may also send the third radio resource allocated to the slave UE to the slave when detecting that the unlicensed spectrum is available. The UE sends control signaling corresponding to the slave UE. At this time, in order for the master UE to know which time slot and which frequency region to send the control signaling and which time slot and which frequency region the slave UE to receive the control signaling, the eNB needs to pre-register in the second part of the licensed spectrum. The control signaling indication information corresponding to the primary UE is sent to the primary UE on the radio resource, and the control signaling indication information is sent to the secondary UE on the second radio resource of the licensed spectrum. The control signaling indication information corresponding to the primary UE is used for Indicate which time slot and which frequency region the master UE receives control signaling from, and the control signaling indication information corresponding to the slave UE is used to indicate which time slot and which frequency region the slave UE receives control signaling from; or, The eNB can pre-configure the time slots and resources for the master UE to send control signaling and the time slots and resources for receiving control signaling from the UE. The master UE determines which time slot and which frequency region to send the control signaling in according to the pre-configuration. , the slave UE determines in which time slot and which frequency region the control signaling is received from according to the pre-configuration. The first radio resource is used for transmitting data on the unlicensed spectrum, and the third radio resource is used for transmitting control signaling on the unlicensed spectrum.

Optionally, the processor 410 is specifically configured to, when the target device is the master UE that sends the control signaling, determine that the UE that receives the control signaling is the slave UE, and receive the control signaling indication information sent by the eNB on the second radio resource. , and then send control signaling to the secondary UE through the third radio resource determined by the control signaling indication information, so that the secondary UE receives control signaling on the third radio resource determined by the control signaling indication information.

Specifically, the eNB may pre-allocate the master UE and at least one slave UE on the unlicensed spectrum with a third radio resource for sending control signaling, and add the indication information for indicating the third radio resource to corresponding to the master UE respectively. In the control signaling indication information and the control signaling indication information corresponding to the secondary UE, the control signaling indication information corresponding to the primary UE is sent to the primary UE through the second radio resource, and the control signaling indication information corresponding to the primary UE is sent to the secondary UE through the second radio resource. The control signaling indication information corresponding to the UE, the master UE sends the control signaling corresponding to the secondary UE to each secondary UE on the third radio resource indicated by the control signaling indication information, and each secondary UE receives the control signaling according to the control signaling information. The indication information is used to determine the third radio resource for receiving the control signaling, and the control signaling is received on the determined third radio resource.

Optionally, the processor 410 is further configured to detect the signal quality of the unlicensed spectrum every predetermined time; if the detection result is that the signal quality of the unlicensed spectrum meets the preset condition, the UE is instructed to use the D2D communication mode to implement data transmission; if If the detection result is that the signal quality of the unlicensed spectrum does not meet the preset condition, the UE is instructed to use the cell communication mode to implement data transmission, and the cell communication mode means that the UE performs data transmission through the eNB.

Since whether the master UE and at least one slave UE can transmit data in the D2D communication mode on the first radio resource depends not only on whether the unlicensed spectrum resource is available, but also on the signal quality of the unlicensed spectrum, in order to avoid unlicensed spectrum The poor signal quality of the spectrum leads to the problem of inefficient communication between the master UE and at least one slave UE. The eNB can detect the signal quality of the unlicensed spectrum every predetermined time or instruct the master UE or the slave UE to detect the unlicensed spectrum every predetermined time. Signal quality of licensed spectrum.

If the detection result is that the signal quality of the unlicensed spectrum meets the preset conditions, the master UE determines to continue to use the D2D communication mode to transmit data; if the detection result is that the signal quality of the unlicensed spectrum does not meet the preset conditions, the master UE determines to use cell communication Mode of data transmission, that is, the master UE sends the data to the eNB through the second radio resource, and the eNB forwards the received data to the slave UE through the second radio resource; or the master UE sends the data to the eNB through the second radio resource, and the eNB The data is further sent to the core network and the application server, and the application server and the core network forward it to the slave UE through the eNB or other eNBs, so as to realize data transmission between the master UE and at least one slave UE.

The preset condition may include at least one of: the unusable duration of the unlicensed spectrum is less than or equal to the first threshold and the duration of the wireless condition of the unlicensed spectrum less than the threshold is less than or equal to the second threshold. Of course, the preset conditions can also be modified, and this embodiment does not limit the preset conditions.

Optionally, if the target device is the master UE and the D2D communication mode is broadcast or multicast, the transmitter 420 is further configured to send the control signaling to the UE on the first radio resource by broadcast or multicast. At least one slave UE sends data; if there is a slave UE that has not received the data, the data is sent to the slave UE again on the second radio resource of the licensed spectrum.

In this embodiment, when there is one slave UE, the master UE may send data to the slave UE on the first radio resource in a unicast manner, so as to implement data transmission in a D2D communication mode. Or, when there is at least one slave UE, the master UE may send data to the at least one slave UE on the first radio resource in a broadcast or multicast manner, and the slave UE feeds back the data reception status. If there is a slave UE that has not received data, the master UE determines that it cannot send data to the slave UE through the first radio resource, and sends data to the slave UE again through the fourth radio resource of the authorized spectrum. The fourth radio resource is used for Transmission of data on licensed spectrum. Alternatively, the master UE may also determine whether the slave UE has received data by detecting the signal quality of the unlicensed spectrum, and this embodiment does not limit the manner of determining the slave UE that has not received data.

It needs to be supplemented that the manner in which the master UE sends data to the slave UE is determined by control signaling. For example, if the indication information of the control signaling includes the C-RNTI or D2D-RNTI of a single secondary UE, the primary UE is instructed to send data to the secondary UE on the first radio resource in a unicast manner; if the indication of the control signaling The information includes the Group RNTI, which indicates that the master UE sends data to the slave UE on the first radio resource through broadcast or multicast.

Further, the eNB may send the control signaling indication information corresponding to the master UE to the master UE and send the control signaling indication information corresponding to the slave UE to at least one slave UE through broadcast or multicast, and the master UE broadcasts or multicasts the control signaling indication information corresponding to the slave UE. The method sends control signaling corresponding to the slave UE to at least one slave UE.

Optionally, the processor 410 is specifically configured to receive the unlicensed spectrum resource pool allocated by the eNB if the target device is the master UE and there is no slave UE served by other eNBs in the slave UE, where the unlicensed spectrum resource pool includes For the unlicensed spectrum in the available state, the first radio resource of the unlicensed spectrum selected from the unlicensed spectrum resource pool is used as the allocated first radio resource.

If each slave UE that uses the D2D communication mode for data transmission is served by the eNB, the master UE may directly allocate the first radio resource of the unlicensed spectrum to each slave UE. Specifically, the eNB may determine the unlicensed spectrum in an available state. For example, the eNB determines that the unlicensed spectrum in the frequency region of 5170-5190 MHz is available; the eNB then determines the unlicensed spectrum resource pool in the available unlicensed spectrum, Allocate the determined unlicensed spectrum resource pool to the master UE. For example, the unlicensed spectrum resource pool is a radio resource with a frequency range of 5170-5175 MHz; the master UE receives the unlicensed spectrum resource pool allocated by the eNB, and assigns the determined unlicensed spectrum to the master UE. The first radio resource of the unlicensed spectrum selected from the resource pool is used as the allocated first radio resource. For example, the master UE selects a PRB in the frequency region of 5170-5172MHz from 5170-5175MHz as the first radio resource for the UE to use. The frequency resources used for D2D communication may also be discontinuous, and the master UE for different D2D communication may select PRBs in different frequency regions in 5170-5190 MHz.

Optionally, the processor 410 is specifically configured to, if the target device is the master UE and there is at least one slave UE served by other eNBs in the slave UE, receive the unlicensed spectrum resource pool sent by the eNB serving the master UE, The unlicensed spectrum resource pool is jointly occupied by the eNB and other eNBs after allocation negotiation, and the first radio resource of the unlicensed spectrum selected from the unlicensed spectrum resource pool is used as the allocated first radio resource.

If there is at least one UE served by another eNB among the secondary UEs that use the D2D communication mode for data transmission, the eNB also needs to negotiate with the other eNB when allocating the unlicensed spectrum resource pool. Specifically, the eNB adds the information of the radio resources that it can occupy into the negotiation information and sends it to other eNBs through the interface between the base stations such as the X2 interface, and the other eNBs determine the other eNB in the radio resources indicated by the negotiation information. The radio resources that can be occupied, and the jointly occupied radio resources are determined as the unlicensed spectrum resource pool, and other eNBs then notify the eNB of the determined unlicensed spectrum resource pool. The eNB allocates the determined unlicensed spectrum resource pool to the master UE, and the master UE selects the first radio resource of the unlicensed spectrum from the unlicensed spectrum resource pool as the allocated first radio resource.

Optionally, the processor 410 is specifically configured to dynamically allocate the first radio resource of the unlicensed spectrum to the UE for each data transmission using the D2D communication mode; or, allocate the unlicensed spectrum to the UE according to a preconfigured semi-static allocation policy. For the first radio resource of the spectrum, the semi-static allocation strategy is an allocation strategy for the first radio resource of the unlicensed spectrum every time the unlicensed spectrum is available.

In this embodiment, the HARQ technology can be used for data transmission between the master UE and at least one slave UE, then the master UE can dynamically allocate the first radio resource of the unlicensed spectrum to the at least one slave UE during each new HARQ transmission, and allocate the first radio resource of the unlicensed spectrum to the at least one slave UE. The method is as described above and will not be repeated here. The HARQ feedback for data can be fed back through the fifth radio resource of the unlicensed spectrum or the sixth radio resource of the licensed spectrum. The fifth radio resource is used to transmit HARQ feedback on the unlicensed spectrum, and the sixth radio resource is used to transmit the HARQ feedback on the licensed spectrum. HARQ feedback is transmitted on the For example, the PUCCH or PUSCH of the PCell is used for feedback or the PUCCH or PUSCH on the SCell is used for feedback, which is not limited in this embodiment.

In this embodiment, the master UE can allocate the first radio resource of the unlicensed spectrum to at least one slave UE according to a pre-configured semi-static allocation policy every time the unlicensed spectrum is available, without dynamically updating the HARQ transmission every time. A first radio resource is allocated. The allocation manner for allocating the first radio resource according to the semi-static allocation strategy is as described above, and details are not described here. Specifically, the master UE may configure the period of the first radio resource for each slave UE through RRC signaling, and then send the semi-static allocation policy to each slave UE through PDCCH or EPDCCH. Since data transmission on the SCell only takes place when unlicensed spectrum is available, the period only takes effect when unlicensed spectrum is available.

It should be added that, if there is at least one slave UE that is served by other eNBs among the slave UEs that use the D2D communication mode for data transmission, and the master UE dynamically allocates the first radio resource or the eNB allocates the first radio resource according to the semi-static allocation strategy. , the control signaling needs to be sent when the eNB and other eNBs jointly occupy the first radio resource, and the eNB and other eNBs each use the third radio resource to send the control signaling to the master UE and the slave UE in the same time slot, and the frequency can be different, so that after receiving the control signaling, each slave UE transmits data from the first radio resource according to the time slot determined by the control signaling.

If there is at least one slave UE that uses the D2D communication mode for data transmission to be served by other eNBs and the master UE allocates the first radio resource according to the semi-static allocation strategy, since the slave UE determines the data transmission according to the available time of the unlicensed spectrum Instead of control signaling, the control signaling may be sent when the eNB and other eNBs jointly occupy the first radio resource, or may not be sent when the eNB and other eNBs jointly occupy the first radio resource. For example, the eNB and other eNBs can send control signaling to the master UE and the slave UE respectively at the same subframe position in different radio frames, so that the master UE and the slave UE that transmit data in the D2D communication mode jointly occupy the first position in the eNB and other eNBs. When the wireless resource is used, the first wireless resource can be used for data transmission. This embodiment does not limit the above two transmission manners of the control signaling.

To sum up, the device communication apparatus provided by the embodiment of the present invention allocates the first radio resource of the unlicensed spectrum to the UE when the unlicensed spectrum is available; generates a control corresponding to the UE according to the allocated first radio resource Signaling, the control signaling carries the indication information used to indicate the first radio resource; send control signaling to the UE, so that the UE implements data transmission in the D2D communication mode on the first radio resource determined according to the indication information, which can be The D2D communication mode is used for data transmission on the first radio resource of the unlicensed spectrum in the available state, without additionally allocating radio resources on the licensed spectrum to the UE, which solves the problem that the radio resources allocated by the eNB for the UE in the D2D communication mode are difficult to meet. The ever-increasing spectrum demand leads to the problem of low communication efficiency between UEs adopting the D2D communication mode, which achieves the effect of improving the communication efficiency between UEs adopting the D2D communication mode.

In addition, when the signal quality of the unlicensed spectrum does not meet the preset conditions, the UE is instructed to use the cell communication mode to realize data transmission, so that when the UE cannot directly send data to other UEs, the data can be sent to the eNB, and the eNB will send the data to the eNB. The received data is forwarded to other UEs to realize data transmission between UEs.

Please refer to FIG. 5 , which shows a method flowchart of a device communication method provided by an embodiment of the present invention. The device communication method can be used in the target device, including:

Step 501, when the unlicensed spectrum is in an available state, allocate a first radio resource of the unlicensed spectrum to the UE, where the unlicensed spectrum refers to the spectrum used by each wireless access system for competition;

The available status of unlicensed spectrum includes at least two situations. One is that the unlicensed spectrum is in an idle state and is not occupied by other wireless access systems; And/or the UE is far away or the power is low, the eNB and the UE or between the UE and the UE can still use the unlicensed spectrum for normal communication without causing serious interference to other wireless access systems.

After determining that the unlicensed spectrum is available, the target device can allocate the first radio resource of the unlicensed spectrum to the UE. For example, if the unlicensed spectrum in the frequency region 5170-5190MHz is available, the target device can select the PRB in the 5170-5175MHz frequency region from 5170-5190MHz for data transmission in the D2D communication mode, and then use the 5170-5175MHz frequency to realize data transmission. The PRB in the 5170-5172MHz frequency region is selected from the PRBs in the region as the first radio resource for the UE; Radio resources, the frequency resources used for D2D communication can also be discontinuous. For different D2D communication UEs can select PRBs in different frequency regions in the 5170-5190 MHz range. This embodiment does not limit the allocation of the first radio resources allocated by the target device. The method does not limit whether the D2D communication uses the uplink resources of the cell or the downlink resources.

Step 502: Generate control signaling corresponding to the UE according to the allocated first radio resource, where the control signaling carries indication information for indicating the first radio resource;

In order for the UE to specify the first radio resource of the unlicensed spectrum allocated to the UE, the target device needs to obtain the indication information of the first radio resource, and add the indication information to the control signaling and send it to the UE. The indication information is used to indicate which time slot and which frequency region the UE transmits or receives data in. The time slot in the present invention refers to the transmission time interval TTI, that is, a scheduling time unit. In LTE, one TTI corresponds to one subframe, occupies a time of 1 ms, and includes two time slots.

Step 503: Send control signaling to the UE, so that the UE implements data transmission in the D2D communication mode on the first radio resource determined according to the indication information.

After the target device sends the control signaling to the UE, the UE can determine which time slot and which frequency region to send or receive data in according to the indication information in the control signaling.

To sum up, the device communication method provided by the embodiment of the present invention allocates the first radio resource of the unlicensed spectrum to the UE when the unlicensed spectrum is available; generates a control corresponding to the UE according to the allocated first radio resource Signaling, the control signaling carries the indication information used to indicate the first radio resource; send control signaling to the UE, so that the UE implements data transmission in the D2D communication mode on the first radio resource determined according to the indication information, which can be The D2D communication mode is used for data transmission on the first radio resource of the unlicensed spectrum in the available state, without additionally allocating radio resources on the licensed spectrum to the UE, which solves the problem that the radio resources allocated by the eNB for the UE in the D2D communication mode are difficult to meet. The ever-increasing spectrum demand leads to the problem of low communication efficiency between UEs adopting the D2D communication mode, which achieves the effect of improving the communication efficiency between UEs adopting the D2D communication mode.

Referring to FIG. 6, it shows a method flowchart of a device communication method provided by another embodiment of the present invention. The device communication method can be used in a target device. In this embodiment, the target device is an eNB in a cellular network as an example. The eNB can be a micro base station, a small base station, or a macro base station. Generally, the transmit power and Coverage varies. Device communication methods, including:

Step 601, when the unlicensed spectrum is in an available state, allocate a first radio resource of the unlicensed spectrum to the UE, where the unlicensed spectrum refers to the spectrum used by each wireless access system for competition;

In this embodiment, the eNB needs to configure a carrier for each of the at least two UEs respectively. Specifically, the eNB may configure the PCell in the frequency band of the licensed spectrum, and configure the SCell in the frequency band of the unlicensed spectrum, and send the carrier configuration information of each cell to the UE. After the carrier configuration is completed, the eNB needs to determine whether the unlicensed spectrum is available and whether the D2D communication mode can be used for data transmission between at least two UEs. Taking the example that at least two UEs are the first UE and the second UE respectively, the eNB can deliver the measurement configuration to the first UE and the second UE respectively, and the measurement configuration and the configuration carrier can use the same message or a different message sent to the first UE and the second UE. The first UE and the second UE respectively send the measurement results obtained by the measurement to the eNB according to the measurement configuration, and the eNB determines whether the unlicensed spectrum is available and whether the D2D communication mode can be used for data transmission between the at least two UEs according to the measurement results.

After determining that the unlicensed spectrum is available and the D2D communication mode can be used to transmit data between at least two UEs, the eNB can allocate the first radio resource of the unlicensed spectrum to the UE.

First, allocate the first radio resources of the unlicensed spectrum to the UE, including:

If the target device is an eNB and there is no UE served by other eNBs in the UE, determine the unlicensed spectrum in an available state, and use the first radio resource of the unlicensed spectrum selected from the determined unlicensed spectrum as the allocated the first radio resource.

If the at least two UEs that use the D2D communication mode for data transmission are both served by the eNB, the eNB may directly allocate the first radio resources of the unlicensed spectrum to the at least two UEs. Specifically, the eNB may determine the unlicensed spectrum resources in an available state. For example, the eNB determines that the unlicensed spectrum in the frequency region of 5170-5190 MHz is available; A radio resource is used as the allocated first radio resource. For example, the eNB selects a PRB in the frequency region of 5170-5172 MHz from 5170-5190 MHz as the first radio resource used by the UE.

Second, allocate the first radio resources of the unlicensed spectrum to the UE, including:

If the target device is an eNB and there is at least one UE served by other eNBs in the UE, it will conduct allocation negotiation with other eNBs, and use the negotiated first radio resource of the unlicensed spectrum jointly occupied by the eNB and other eNBs as the first radio resource of the allocation. a wireless resource.

If at least one of the at least two UEs that use the D2D communication mode for data transmission is served by another eNB, the eNB also needs to negotiate with the other eNB when allocating the first radio resource of the unlicensed spectrum. The eNB serving as the target device refers to the eNB that provides the PCell and the SCell on the unlicensed spectrum for the UE, and the other eNBs refer to other eNBs that use at least the unlicensed spectrum. The eNB and other eNBs may be adjacent and provide different cells. For example, the first The eNB and the second eNB; or, the eNB and other eNBs may provide cells for carrier aggregation between base stations, eg, the primary eNB and the secondary eNB.

Specifically, the eNB adds the information of the radio resources that it can occupy into the negotiation information and sends it to other eNBs through the interface between the base stations such as the X2 interface, and the other eNBs determine the other eNB in the radio resources indicated by the negotiation information. The radio resource that can be occupied, and the determined radio resource is used as the first radio resource, and other eNBs then notify the eNB of the determined first radio resource.

Assuming that the eNB provides services to the first UE and other eNBs provide services to the second UE, the eNB sends control signaling to the first UE according to the determined third radio resources, and at the same time, other eNBs send control signaling to the second UE according to the determined third radio resources The UE sends the control signaling, and the first UE and the second UE use the D2D communication mode to perform data transmission on the first radio resource after receiving the control signaling.

It should be noted that the UE that uses the D2D communication mode to transmit data should be in the same discontinuous reception DRX state, for example, the first UE and the second UE can receive control signaling only during the active time.

Third, allocate the first radio resources of the unlicensed spectrum to the UE, including:

For each data transmission in the D2D communication mode, dynamically allocate the first radio resource of the unlicensed spectrum to the UE; or,

The first radio resource of the unlicensed spectrum is allocated to the UE according to a preconfigured semi-static allocation policy, which is an allocation policy of the first radio resource of the unlicensed spectrum every time the unlicensed spectrum is available.

In this embodiment, the HARQ technology can be used for data transmission between UEs, and the eNB can dynamically allocate the first radio resource of the unlicensed spectrum to at least two UEs during each new HARQ transmission. The allocation method is as described above, here I won't go into details. The HARQ feedback for data can be fed back through the fifth radio resource of the unlicensed spectrum or the sixth radio resource of the licensed spectrum. The fifth radio resource is used to transmit HARQ feedback on the unlicensed spectrum, and the sixth radio resource is used to transmit the HARQ feedback on the licensed spectrum. HARQ feedback is transmitted on the For example, the PUCCH or PUSCH of the PCell is used for feedback or the PUCCH or PUSCH on the SCell is used for feedback, which is not limited in this embodiment.

When the HARQ feedback indicates that a certain new transmission data is lost, HARQ retransmission needs to be performed. The eNB may dynamically allocate the first radio resource of the unlicensed spectrum to at least two UEs during each HARQ retransmission. The allocation method is as described above, and will not be repeated here; The first radio resource allocated for HARQ retransmission or HARQ new transmission.

In this embodiment, the eNB may allocate the first radio resource of the unlicensed spectrum to at least two UEs according to a pre-configured semi-static allocation policy every time the unlicensed spectrum is available, without the need for dynamic allocation for each new HARQ transmission the first radio resource. The allocation manner for allocating the first radio resource according to the semi-static allocation strategy is as described above, and details are not described here. Specifically, the eNB may configure the period of the first radio resource for each UE through RRC signaling, and then send the semi-static allocation policy to each UE through the PDCCH or EPDCCH. Since data transmission on the SCell only takes place when unlicensed spectrum is available, the period only takes effect when unlicensed spectrum is available.

Step 602: Generate control signaling corresponding to the UE according to the allocated first radio resource, where the control signaling carries indication information for indicating the first radio resource;

In order for the UE to specify the first radio resource of the unlicensed spectrum allocated to the UE, the eNB needs to acquire the indication information of the first radio resource, and add the indication information to the control signaling corresponding to the UE and send it to the UE. The indication information is used to indicate which time slot and which frequency region the UE transmits or receives data in.

Since the UE can only perform a receiving operation or a sending operation at the same time when data is transmitted in the D2D communication mode, the eNB also needs to indicate the operation type of the UE in the control signaling. For example, when the first UE sends data and the second UE receives data, the control signaling corresponding to the first UE is used to instruct the first UE to send data from a certain frequency region in a certain time slot, and the control signaling corresponding to the second UE is used to instruct the first UE to send data from a certain frequency region in a certain time slot. The control signaling is used to instruct the second UE to receive data from a certain frequency region in a certain time slot. Or pre-configure the first UE to send data in the first type of time slot, the second UE to receive data in the first type of time slot, and the first UE to receive data in the second type of time slot, and the second UE to send data in the second type of time slot data, where the first type of time slot and the second type of time slot are different, and they together form all or part of the time slot, then the first UE and the second UE send and receive data according to the pre-configured time slot position, without using The eNB indicates the operation type of the UE through control signaling.

Step 603: Send control signaling to the UE, so that the UE implements data transmission in the D2D communication mode on the first radio resource determined according to the indication information.

After the eNB sends the control signaling to the UE, the UE can determine which time slot and which frequency region to send or receive data in according to the indication information in the control signaling.

Wherein, sending control signaling to the UE includes:

Send control signaling to the UE through the second radio resource of the licensed spectrum configured by the eNB for the UE; or,

The control signaling is sent to the UE through the third radio resource of the unlicensed spectrum. The third radio resource is determined by the control signaling indication information or pre-configuration, and the control signaling indication information is the second radio of the licensed spectrum configured by the eNB for the UE. sent on the resource.

In order to ensure that the UE can correctly receive the control signaling, so as to improve the reliability of transmitting the control signaling, the eNB may configure the second radio resource of the licensed spectrum for sending the control signaling. In this embodiment, since the PCell is configured in the frequency band of the licensed spectrum, the eNB can send control signaling to the UE through the PDCCH or EPDCCH on the PCell. or,

In order to further avoid or reduce the occupation of the second radio resource by the UE and save the resources on the licensed spectrum, the eNB may also send a message to the UE through the third radio resource allocated for the UE when detecting that the unlicensed spectrum is available. Corresponding control signaling. At this time, in order for the UE to know which time slot and which frequency region to receive the control signaling, the eNB also needs to send the control signaling indication information to the UE on the second radio resource of the licensed spectrum in advance. The control signaling indication information It is used to indicate which time slot and from which frequency region the UE receives the control signaling; or, the eNB may pre-configure the time slot and resources for the UE to receive the control signaling, and the UE determines which time slot and which time slot is received according to the pre-configuration. A frequency region receives control signaling. The first radio resource is used for transmitting data on the unlicensed spectrum, and the third radio resource is used for transmitting control signaling on the unlicensed spectrum.

Specifically, sending control signaling to the UE through the first radio resource includes:

When the target device is an eNB, it sends control signaling indication information to the UE through the second radio resource, and then sends control signaling to the UE through the third radio resource determined by the control signaling indication information, so that the UE can determine the information in the control signaling indication information. Receive control signaling on the third radio resource.

Specifically, the eNB may pre-allocate a third radio resource for sending control signaling to at least two UEs on the unlicensed spectrum, and add indication information for indicating the third radio resource to the control signaling indication information, through The second radio resource sends control signaling indication information to each UE respectively, and then sends control signaling corresponding to the UE to each UE on the third radio resource respectively, and the UE determines to receive the control signaling indication information according to the received control signaling Control the third radio resource of the signaling, and receive the control signaling on the determined third radio resource.

It should be supplemented that the method provided in this embodiment further includes:

Check the signal quality of the unlicensed spectrum every predetermined time;

If the detection result is that the signal quality of the unlicensed spectrum meets the preset condition, the UE is instructed to use the D2D communication mode to implement data transmission;

If the detection result is that the signal quality of the unlicensed spectrum does not meet the preset condition, the UE is instructed to implement data transmission in a cell communication mode, where the cell communication mode means that the UE performs data transmission through the eNB.

Whether the UE can transmit data in the D2D communication mode on the first radio resource depends not only on whether the unlicensed spectrum resource is available, but also on the signal quality of the unlicensed spectrum. Therefore, in order to avoid the poor signal quality of the unlicensed spectrum As a result of the problem of low communication efficiency between UEs, the eNB may detect the signal quality of the unlicensed spectrum every predetermined time or instruct the UE to detect the signal quality of the unlicensed spectrum every predetermined time.

If the detection result is that the signal quality of the unlicensed spectrum meets the preset conditions, the eNB determines to continue to transmit data in the D2D communication mode; if the detection result is that the signal quality of the unlicensed spectrum does not meet the preset conditions, the eNB determines to use the cell communication mode for transmission. data, that is, the first UE sends the data to the eNB through the second radio resource, and the eNB forwards the received data to the second UE through the second radio resource; or the first UE sends the data to the eNB through the second radio resource, The eNB further sends the data to the core network and the application server, and the application server and the core network forward the data to the second UE through the eNB or other eNBs, so as to realize data transmission between the UEs. The preset condition may include at least one of: the unusable duration of the unlicensed spectrum is less than or equal to the first threshold and the duration of the wireless condition of the unlicensed spectrum less than the threshold is less than or equal to the second threshold. Of course, the preset conditions can also be modified, and this embodiment does not limit the preset conditions.

It should be added that if at least one of the at least two UEs using the D2D communication mode for data transmission is served by another eNB, and the eNB dynamically allocates the first radio resource or the eNB allocates the first radio resource according to the semi-static allocation policy. , the control signaling needs to be sent when the eNB and other eNBs jointly occupy the first radio resource, and the eNB and other eNBs respectively use the third radio resource to send the control signaling to the UE in the same time slot, and the frequency can be different, so that each time After receiving the control signaling, a UE transmits data from the first radio resource according to the time slot determined by the control signaling.

If at least one of the at least two UEs using the D2D communication mode for data transmission is served by another eNB and the eNB allocates the first radio resource according to the semi-static allocation strategy, since the UE determines the data transmission according to the available time of the unlicensed spectrum Instead of control signaling, the control signaling may be sent when the eNB and other eNBs jointly occupy the first radio resource, or may not be sent when the eNB and other eNBs jointly occupy the first radio resource. For example, the eNB and other eNBs may send control signaling to the first UE and the second UE respectively at the same subframe position in different radio frames, so that the first UE and the second UE that transmit data in the D2D communication mode can communicate with the eNB and other eNBs. When the first wireless resource is jointly occupied, the first wireless resource may be used for data transmission. This embodiment does not limit the above two transmission manners of the control signaling.

To sum up, the device communication method provided by the embodiment of the present invention allocates the first radio resource of the unlicensed spectrum to the UE when the unlicensed spectrum is available; generates a control corresponding to the UE according to the allocated first radio resource Signaling, the control signaling carries the indication information used to indicate the first radio resource; send control signaling to the UE, so that the UE implements data transmission in the D2D communication mode on the first radio resource determined according to the indication information, which can be The D2D communication mode is used for data transmission on the first radio resource of the unlicensed spectrum in the available state, without additionally allocating radio resources on the licensed spectrum to the UE, which solves the problem that the radio resources allocated by the eNB for the UE in the D2D communication mode are difficult to meet. The ever-increasing spectrum demand leads to the problem of low communication efficiency between UEs adopting the D2D communication mode, which achieves the effect of improving the communication efficiency between UEs adopting the D2D communication mode.

In addition, when the signal quality of the unlicensed spectrum does not meet the preset conditions, the UE is instructed to use the cell communication mode to realize data transmission, so that when the UE cannot directly send data to other UEs, the data can be sent to the eNB, and the eNB will send the data to the eNB. The received data is forwarded to other UEs to realize data transmission between UEs.

Referring to FIG. 7 , it shows a method flowchart of a device communication method provided by another embodiment of the present invention. The device communication method can be used in a master UE, and the UEs that are not declared to be the master UE in the embodiment are all slave UEs, and the master UE and the slave UE can be designated dynamically or through a semi-static allocation strategy. Device communication methods include:

Step 701, when the unlicensed spectrum is in an available state, allocate a first radio resource of the unlicensed spectrum to the UE, where the unlicensed spectrum refers to the spectrum used by each wireless access system for competition;

In this embodiment, the eNB needs to configure a carrier for each of the master UE and the at least one slave UE respectively. Specifically, the eNB may configure the PCell in the frequency band of the licensed spectrum, and configure the SCell in the frequency band of the unlicensed spectrum, and send the carrier configuration information of each cell to the master UE and at least one slave UE. After the carrier configuration is completed, the eNB needs to determine whether the unlicensed spectrum is available and whether the D2D communication mode can be used for data transmission between the master UE and at least one slave UE.

Taking the master UE and the slave UE as an example, the eNB can deliver the measurement configuration to the master UE and the slave UE respectively, and the measurement configuration and the configuration carrier can be sent to the master UE and the slave UE using the same message or a different message. The master UE and the slave UE respectively send the measurement results obtained by the measurement to the eNB according to the measurement configuration, and the eNB determines whether the unlicensed spectrum is available and whether the master UE and the slave UE can use the D2D communication mode for data transmission according to the measurement results.

The available status of unlicensed spectrum includes at least two situations. One is that the unlicensed spectrum is in an idle state and is not occupied by other wireless access systems; And/or the UE is far away or the power is low, the eNB and the UE or between the master UE and the slave UE can still use the unlicensed spectrum for normal communication without causing serious interference to other wireless access systems.

After the master UE determines that the unlicensed spectrum is available and the D2D communication mode can be used to transmit data between the master UE and the slave UE, the master UE can allocate the first radio resource of the unlicensed spectrum to the slave UE.

First, allocate the first radio resources of the unlicensed spectrum to the UE, including:

If the target device is the master UE and there is no slave UE served by other eNBs, the unlicensed spectrum resource pool allocated by the eNB will be received. The first radio resource of the unlicensed spectrum selected from the spectrum resource pool is used as the allocated first radio resource.

If each slave UE that uses the D2D communication mode for data transmission is served by the eNB, the master UE may directly allocate the first radio resource of the unlicensed spectrum to each slave UE. Specifically, the eNB may determine the unlicensed spectrum resources that are available. For example, the eNB determines that the unlicensed spectrum in the frequency region of 5170-5190 MHz is available; the eNB then determines the unlicensed spectrum resource pool in the unlicensed spectrum that is available. , allocate the determined unlicensed spectrum resource pool to the master UE, for example, the unlicensed spectrum resource pool is a radio resource with a frequency range of 5170-5175MHz; the master UE receives the unlicensed spectrum resource pool allocated by the eNB, and assigns the determined unlicensed spectrum resource pool to the The first radio resource of the unlicensed spectrum selected from the spectrum resource pool is used as the allocated first radio resource. For example, the primary UE selects a PRB in the frequency region of 5170-5172MHz from 5170-5175MHz as the first radio resource for the UE to use . The frequency resources used for D2D communication may also be discontinuous, and the master UE for different D2D communication may select PRBs in different frequency regions in 5170-5190 MHz.

Second, allocate the first radio resources of the unlicensed spectrum to the UE, including:

If the target device is the master UE and there is at least one slave UE served by other eNBs in the slave UE, the unlicensed spectrum resource pool sent by the eNB serving the master UE is received. If it is determined to be jointly occupied after the allocation negotiation, the first radio resource of the unlicensed spectrum selected from the unlicensed spectrum resource pool is used as the allocated first radio resource.

If there is at least one UE served by another eNB among the secondary UEs that use the D2D communication mode for data transmission, the eNB also needs to negotiate with the other eNB when allocating the unlicensed spectrum resource pool. Among them, eNB refers to the eNB that provides PCell and SCell on unlicensed spectrum for the main UE, other eNB refers to other eNBs that use at least unlicensed spectrum, eNB and other eNBs can be adjacent and provide different cells, for example, the first eNB and the second Two eNBs; or, an eNB and other eNBs may provide cells for carrier aggregation between base stations, such as a primary eNB and a secondary eNB.

Specifically, the eNB adds the information of the radio resources that it can occupy into the negotiation information and sends it to other eNBs through the interface between the base stations such as the X2 interface, and the other eNBs determine the other eNB in the radio resources indicated by the negotiation information. The radio resources that can be occupied, and the jointly occupied radio resources are determined as the unlicensed spectrum resource pool, and other eNBs then notify the eNB of the determined unlicensed spectrum resource pool. The eNB allocates the determined unlicensed spectrum resource pool to the master UE, and the master UE selects the first radio resource of the unlicensed spectrum from the unlicensed spectrum resource pool as the allocated first radio resource. Assuming that the eNB provides services to the master UE and other eNBs provide services to the slave UEs, the eNB allocates the determined unlicensed spectrum resource pool to the master UE, and the other eNBs allocate the determined unlicensed spectrum resource pool to the slave UE. Select the first radio resource from the authorized spectrum resource pool, generate control signaling corresponding to the slave UE according to the first radio resource, send the control signaling to the slave UE, and after the slave UE receives the control signaling, generate the control signaling in the first radio resource The D2D communication mode is used for data transmission with the primary UE.

It should be noted that the master UE and the slave UE that use the D2D communication mode to transmit data should be in the same discontinuous reception DRX state, for example, the master UE and the slave UE can transmit control signaling only during the active time.

Third, allocate the first radio resources of the unlicensed spectrum to the UE, including:

For each data transmission in the D2D communication mode, dynamically allocate the first radio resource of the unlicensed spectrum to the UE; or,

The first radio resource of the unlicensed spectrum is allocated to the UE according to a preconfigured semi-static allocation policy, which is an allocation policy of the first radio resource of the unlicensed spectrum every time the unlicensed spectrum is available.

In this embodiment, the HARQ technology can be used for data transmission between the master UE and at least one slave UE, then the master UE can dynamically allocate the first radio resource of the unlicensed spectrum to the at least one slave UE during each new HARQ transmission, and allocate the first radio resource of the unlicensed spectrum to the at least one slave UE. The method is as described above and will not be repeated here. The HARQ feedback for data can be fed back through the fifth radio resource of the unlicensed spectrum or the sixth radio resource of the licensed spectrum. The fifth radio resource is used to transmit HARQ feedback on the unlicensed spectrum, and the sixth radio resource is used to transmit the HARQ feedback on the licensed spectrum. HARQ feedback is transmitted on the For example, the PUCCH or PUSCH of the PCell is used for feedback or the PUCCH or PUSCH on the SCell is used for feedback, which is not limited in this embodiment.

When the HARQ feedback indicates that a certain new transmission data is lost, HARQ retransmission needs to be performed. The master UE can dynamically allocate the first radio resource of the unlicensed spectrum to at least two UEs during each HARQ retransmission. The first radio resource allocated during the last HARQ retransmission or new HARQ transmission.

In this embodiment, the master UE can allocate the first radio resource of the unlicensed spectrum to at least one slave UE according to a pre-configured semi-static allocation policy every time the unlicensed spectrum is available, without dynamically updating the HARQ transmission every time. A first radio resource is allocated. The allocation manner for allocating the first radio resource according to the semi-static allocation strategy is as described above, and details are not described here. Specifically, the master UE may configure the period of the first radio resource for each slave UE through RRC signaling, and then send the semi-static allocation policy to each slave UE through PDCCH or EPDCCH. Since data transmission on the SCell only takes place when unlicensed spectrum is available, the period only takes effect when unlicensed spectrum is available.

Step 702: Generate control signaling corresponding to the UE according to the allocated first radio resource, where the control signaling carries indication information for indicating the first radio resource;

In order to make the secondary UE specify the first radio resource of the unlicensed spectrum allocated by the secondary UE, the primary UE needs to obtain the indication information of the first radio resource, and add the indication information to the control signaling corresponding to the secondary UE and send it to the secondary UE . The indication information is used to indicate which time slot and which frequency region the UE sends or receives data in. The time slot in the present invention refers to the transmission time interval TTI, that is, a scheduling time unit. In LTE, one TTI corresponds to one subframe, occupies a time of 1 ms, and includes two time slots.

Since the slave UE can only perform a receiving operation or a sending operation at the same time when data is transmitted in the D2D communication mode, the master UE also needs to indicate the operation type of the slave UE in the control signaling. For example, when the master UE sends data and receives data from the slave UE, the control signaling corresponding to the slave UE is used to instruct the slave UE to receive data from a certain time slot and from a certain frequency region. Or preconfigure the master UE to send data in the first type of time slot, the slave UE to receive data in the first type of time slot, and the master UE to receive data in the second type of time slot, and the slave UE to send data in the second type of time slot, where the first The first type of time slot is different from the second type of time slot, they together form all the time slots or part of the time slot, then the master UE and the slave UE send and receive data according to the pre-configured time slot position, without the master UE through the control signaling Indicates the operation type from the UE.

Step 703: Send control signaling to the UE, so that the UE uses the D2D communication mode to implement data transmission on the first radio resource determined according to the indication information;

After the master UE sends the control signaling to the slave UE, the slave UE can determine which time slot and which frequency region to send or receive data from according to the indication information in the control signaling.

Wherein, sending control signaling to the UE includes:

Send control signaling to the UE through the second radio resource of the licensed spectrum configured by the eNB for the UE; or,

The control signaling is sent to the UE through the third radio resource of the unlicensed spectrum. The third radio resource is determined by the control signaling indication information or pre-configuration, and the control signaling indication information is the second radio of the licensed spectrum configured by the eNB for the UE. sent on the resource.

In order to ensure that the slave UE can correctly receive the control signaling, so as to improve the reliability of transmission of the control signaling, the master UE may send the control signaling to the slave UE through the second radio resource of the licensed spectrum. In this embodiment, since the PCell is configured in the frequency band of the licensed spectrum, the master UE can send control signaling to the slave UE through the PDCCH, EPDCCH or PUCCH on the PCell. or,

In order to further avoid or reduce the occupation of the second radio resources by the master UE and save resources on the licensed spectrum, the master UE may also detect that the unlicensed spectrum is available and no other radio access system is occupying the unlicensed spectrum. When the resource is used, the control signaling corresponding to the slave UE is sent to the slave UE through the third radio resource allocated for the slave UE. At this time, in order for the master UE to know which time slot and which frequency region to send the control signaling and which time slot and which frequency region the slave UE to receive the control signaling, the eNB needs to pre-register in the second part of the licensed spectrum. The control signaling indication information corresponding to the primary UE is sent to the primary UE on the radio resource, and the control signaling indication information is sent to the secondary UE on the second radio resource of the licensed spectrum. The control signaling indication information corresponding to the primary UE is used for Indicate which time slot and which frequency region the master UE receives control signaling from, and the control signaling indication information corresponding to the slave UE is used to indicate which time slot and which frequency region the slave UE receives control signaling from; or, The eNB can pre-configure the time slots and resources for the master UE to send control signaling and the time slots and resources for receiving control signaling from the UE. The master UE determines which time slot and which frequency region to send the control signaling in according to the pre-configuration. , the slave UE determines in which time slot and which frequency region the control signaling is received from according to the pre-configuration. The first radio resource is used for transmitting data on the unlicensed spectrum, and the third radio resource is used for transmitting control signaling on the unlicensed spectrum.

Specifically, sending control signaling to the UE through the first radio resource includes:

When the target device is the master UE that sends the control signaling, determine that the UE receiving the control signaling is the slave UE, receive the control signaling indication information sent by the eNB on the second radio resource, and then use the control signaling indication information to determine the first UE. The three radio resources send control signaling to the secondary UE, so that the secondary UE receives control signaling on the third radio resource determined by the control signaling indication information.

Specifically, the eNB may pre-allocate the master UE and at least one slave UE on the unlicensed spectrum with a third radio resource for sending control signaling, and add the indication information for indicating the third radio resource to corresponding to the master UE respectively. In the control signaling indication information and the control signaling indication information corresponding to the secondary UE, the control signaling indication information corresponding to the primary UE is sent to the primary UE through the second radio resource, and the control signaling indication information corresponding to the primary UE is sent to the secondary UE through the second radio resource. The control signaling indication information corresponding to the UE, the master UE sends the control signaling corresponding to the secondary UE to each secondary UE on the third radio resource indicated by the control signaling indication information, and each secondary UE receives the control signaling according to the control signaling information. The indication information is used to determine the third radio resource for receiving the control signaling, and the control signaling is received on the determined third radio resource.

Step 704, if the target device is the master UE and the D2D communication mode is broadcast or multicast, send data to at least one slave UE on the first radio resource through broadcast or multicast; if there is a slave UE that has not received data , the data is sent to the secondary UE again on the fourth radio resource of the licensed spectrum.

In this embodiment, when there is one slave UE, the master UE may send data to the slave UE on the first radio resource in a unicast manner, so as to implement data transmission in a D2D communication mode. Or, when there is at least one slave UE, the master UE may send data to the at least one slave UE on the first radio resource in a broadcast or multicast manner, and the slave UE feeds back the data reception status. If there is a slave UE that has not received data, the master UE determines that it cannot send data to the slave UE through the first radio resource, and then sends data to the slave UE again through the second radio resource of the licensed spectrum. Alternatively, the master UE may also determine whether the slave UE has received data by detecting the signal quality of the unlicensed spectrum, and this embodiment does not limit the manner of determining the slave UE that has not received data.

It needs to be supplemented that the manner in which the master UE sends data to the slave UE is determined by control signaling. For example, if the indication information of the control signaling includes the C-RNTI or D2D-RNTI of a single secondary UE, the primary UE is instructed to send data to the secondary UE on the first radio resource in a unicast manner; if the indication of the control signaling The information includes the Group RNTI, which indicates that the master UE sends data to the slave UE on the first radio resource through broadcast or multicast.

Further, the eNB may send the control signaling indication information corresponding to the master UE to the master UE and send the control signaling indication information corresponding to the slave UE to at least one slave UE through broadcast or multicast, and the master UE broadcasts or multicasts the control signaling indication information corresponding to the slave UE. The method sends control signaling corresponding to the slave UE to at least one slave UE.

It should be supplemented that the method provided in this embodiment further includes:

Check the signal quality of the unlicensed spectrum every predetermined time;

If the detection result is that the signal quality of the unlicensed spectrum meets the preset condition, the UE is instructed to use the D2D communication mode to implement data transmission;

If the detection result is that the signal quality of the unlicensed spectrum does not meet the preset condition, the UE is instructed to implement data transmission in a cell communication mode, where the cell communication mode means that the UE performs data transmission through the eNB.

Since whether the master UE and at least one slave UE can transmit data in the D2D communication mode on the first radio resource depends not only on whether the unlicensed spectrum resource is available, but also on the signal quality of the unlicensed spectrum, in order to avoid unlicensed spectrum The poor signal quality of the spectrum leads to the problem of inefficient communication between the master UE and at least one slave UE. The eNB can detect the signal quality of the unlicensed spectrum every predetermined time or instruct the master UE or the slave UE to detect the unlicensed spectrum every predetermined time. Signal quality of licensed spectrum.

If the detection result is that the signal quality of the unlicensed spectrum meets the preset conditions, the master UE determines to continue to use the D2D communication mode to transmit data; if the detection result is that the signal quality of the unlicensed spectrum does not meet the preset conditions, the master UE determines to use cell communication Mode of data transmission, that is, the master UE sends the data to the eNB through the second radio resource, and the eNB forwards the received data to the slave UE through the second radio resource; or the master UE sends the data to the eNB through the second radio resource, and the eNB The data is further sent to the core network and the application server, and the application server and the core network forward it to the slave UE through the eNB or other eNBs, so as to realize data transmission between the master UE and at least one slave UE. The preset condition may include at least one of: the unusable duration of the unlicensed spectrum is less than or equal to the first threshold and the duration of the wireless condition of the unlicensed spectrum less than the threshold is less than or equal to the second threshold. Of course, the preset conditions can also be modified, and this embodiment does not limit the preset conditions.

It should be added that, if there is at least one slave UE that is served by other eNBs among the slave UEs that use the D2D communication mode for data transmission, and the master UE dynamically allocates the first radio resource or the eNB allocates the first radio resource according to the semi-static allocation strategy. , the control signaling needs to be sent when the eNB and other eNBs jointly occupy the first radio resource, and the eNB and other eNBs each use the third radio resource to send the control signaling to the master UE and the slave UE in the same time slot, and the frequency can be different, so that after receiving the control signaling, each slave UE transmits data from the first radio resource according to the time slot determined by the control signaling.

If there is at least one slave UE that uses the D2D communication mode for data transmission to be served by other eNBs and the master UE allocates the first radio resource according to the semi-static allocation strategy, since the slave UE determines the data transmission according to the available time of the unlicensed spectrum Instead of control signaling, the control signaling may be sent when the eNB and other eNBs jointly occupy the first radio resource, or may not be sent when the eNB and other eNBs jointly occupy the first radio resource. For example, the eNB and other eNBs can send control signaling to the master UE and the slave UE respectively at the same subframe position in different radio frames, so that the master UE and the slave UE that transmit data in the D2D communication mode jointly occupy the first position in the eNB and other eNBs. When the wireless resource is used, the first wireless resource can be used for data transmission. This embodiment does not limit the above two transmission manners of the control signaling.

To sum up, the device communication method provided by the embodiment of the present invention allocates the first radio resource of the unlicensed spectrum to the UE when the unlicensed spectrum is available; generates a control corresponding to the UE according to the allocated first radio resource Signaling, the control signaling carries the indication information used to indicate the first radio resource; send control signaling to the UE, so that the UE implements data transmission in the D2D communication mode on the first radio resource determined according to the indication information, which can be The D2D communication mode is used for data transmission on the first radio resource of the unlicensed spectrum in the available state, without additionally allocating radio resources on the licensed spectrum to the UE, which solves the problem that the radio resources allocated by the eNB for the UE in the D2D communication mode are difficult to meet. The ever-increasing spectrum demand leads to the problem of low communication efficiency between UEs adopting the D2D communication mode, which achieves the effect of improving the communication efficiency between UEs adopting the D2D communication mode.

In addition, when the signal quality of the unlicensed spectrum does not meet the preset conditions, the UE is instructed to use the cell communication mode to realize data transmission, so that when the UE cannot directly send data to other UEs, the data can be sent to the eNB, and the eNB will send the data to the eNB. The received data is forwarded to other UEs to realize data transmission between UEs.

It should be noted that: when the device communication apparatus provided in the above embodiment performs device communication, only the division of the above functional modules is used as an example for illustration. That is, the internal structure of the device communication apparatus is divided into different functional modules to complete all or part of the functions described above. In addition, the device communication apparatus and the device communication method embodiments provided by the above embodiments belong to the same concept, and the specific implementation process thereof is detailed in the method embodiments, which will not be repeated here.

The above-mentioned serial numbers of the embodiments of the present invention are only for description, and do not represent the advantages or disadvantages of the embodiments.

Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each particular application, but such implementations should not be considered beyond the scope of the present invention.

Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the above-described systems, devices and units may refer to the corresponding processes in the foregoing method embodiments, which will not be repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the apparatus embodiments described above are only illustrative. For example, the division of the units may only be a logical function division. In actual implementation, there may be other division methods, for example, multiple units or components may be combined Either it can be integrated into another system, or some features can be omitted, or not implemented. On the other hand, the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit.

The functions, if implemented in the form of software functional units and sold or used as independent products, may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention can be embodied in the form of a software product in essence, or the part that contributes to the prior art or the part of the technical solution. The computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program codes .

The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited to this. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention. should be included within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims (18)

1. A device communication device, characterized in that, used in a target device, the device comprising: a resource allocation module, configured to allocate a first radio resource of the unlicensed spectrum to the user equipment UE when the unlicensed spectrum is in an available state, where the unlicensed spectrum refers to a spectrum used for competition by each wireless access system; a signaling generation module, configured to generate control signaling corresponding to the UE according to the first radio resource allocated by the resource allocation module, where the control signaling carries indication information for indicating the first radio resource , the indication information is used to indicate the time slot and frequency region used when the first radio resource is used to receive or send data; a signaling sending module, configured to send the control signaling generated by the signaling generating module to the UE, so that the UE adopts device-to-device D2D on the first radio resource determined according to the indication information The communication mode realizes data transmission; Wherein, the signaling sending module includes: a second sending unit, configured to send the control signaling to the UE through a third radio resource of an unlicensed spectrum, where the third radio resource is determined by control signaling indication information or pre-configuration, and the control signaling indicates The information is sent by the eNB on the second radio resource of the licensed spectrum configured by the eNB for the UE; Wherein, the second sending unit includes: a first sending subunit, configured to send the control signaling indication information to the UE through the second radio resource when the target device is an eNB, and then use the control signaling indication information to determine the The third radio resource sends the control signaling to the UE, so that the UE receives the control signaling on the third radio resource determined by the control signaling indication information; The second sending subunit is configured to, when the target device is the master UE sending the control signaling, determine that the UE receiving the control signaling is a slave UE, and receive the eNB on the second radio resource The sent control signaling indication information, and then send the control signaling to the secondary UE through the third radio resource determined by the control signaling indication information, so that the secondary UE can use the control signaling in the control signaling. The control signaling is received on the third radio resource determined by the indication information. 2. The device according to claim 1, wherein the device further comprises: a signal detection module, configured to detect the signal quality of the unlicensed spectrum every predetermined time; a first communication module, configured to instruct the UE to use the D2D communication mode to implement data transmission when the result of detection by the signal detection module is that the signal quality of the unlicensed spectrum meets a preset condition; A second communication module, configured to instruct the UE to implement data transmission in a cell communication mode when the signal quality of the unlicensed spectrum does not meet a preset condition as a result of detection by the signal detection module, and the cell communication mode is It means that the UE performs data transmission through the eNB. 3. The apparatus according to claim 1, wherein if the target device is a master UE and the D2D communication mode is broadcast or multicast, the apparatus further comprises: a data dissemination module, configured to send data to at least one slave UE on the first radio resource by means of broadcast or multicast after the signaling sending module sends the control signaling to the UE; A data sending module, configured to send the data to the slave UE again on the fourth radio resource of the authorized spectrum if there is a slave UE that has not received the data propagated by the data propagation module. 4. The apparatus according to any one of claims 1 to 3, wherein the resource allocation module comprises: a first allocation unit, configured to determine an unlicensed spectrum in an available state if the target device is an eNB and there is no UE served by other eNBs in the UE, and select from the determined unlicensed spectrum The first wireless resource of the unlicensed spectrum is used as the allocated first wireless resource; a second allocation unit, configured to receive an unlicensed spectrum resource pool allocated by the eNB if the target device is a master UE and there is no slave UE served by another eNB in the slave UE, the unlicensed spectrum resource pool The unlicensed spectrum in an available state is included, and the first radio resource of the unlicensed spectrum selected from the unlicensed spectrum resource pool is used as the allocated first radio resource. 5. The apparatus according to any one of claims 1 to 3, wherein the resource allocation module comprises: The third allocation unit is configured to perform allocation negotiation with the other eNBs if the target device is an eNB and there is at least one UE served by other eNBs in the UE, and allocate the negotiated eNB and the The first radio resource of the unlicensed spectrum jointly occupied by other eNBs is used as the allocated first radio resource; a fourth allocating unit, configured to receive an unlicensed spectrum resource sent by an eNB serving the master UE if the target device is a master UE and there is at least one slave UE served by another eNB in the slave UE The unlicensed spectrum resource pool is jointly occupied by the eNB and the other eNBs after the allocation negotiation, and the first radio resource of the unlicensed spectrum selected from the unlicensed spectrum resource pool is allocated as the allocation of the first radio resource. 6. The apparatus according to any one of claims 1 to 3, wherein the resource allocation module comprises: a fifth allocation unit, configured to dynamically allocate the first radio resource of the unlicensed spectrum to the UE for each data transmission using the D2D communication mode; or, A sixth allocating unit, configured to allocate the first radio resource of the unlicensed spectrum to the UE according to a preconfigured semi-static allocation strategy, where the semi-static allocation strategy is to allocate the unlicensed spectrum every time the unlicensed spectrum is available. an allocation strategy of the first radio resource of the unlicensed spectrum. 7. A device communication device, characterized in that, used in a target device, the device comprising: a processor, configured to allocate the first radio resource of the unlicensed spectrum to the user equipment UE when the unlicensed spectrum is in an available state, where the unlicensed spectrum refers to the spectrum used by each wireless access system for competition; according to the allocation generating control signaling corresponding to the UE for the first radio resource, where the control signaling carries indication information for indicating the first radio resource; a transmitter, configured to send the control signaling generated by the processor to the UE, so that the UE implements data using a device-to-device D2D communication mode on the first radio resource determined according to the indication information transmission, the indication information is used to indicate the time slot and frequency region used when receiving or sending data by using the first radio resource; The transmitter is specifically configured to send the control signaling to the UE through a third radio resource of an unlicensed spectrum, where the third radio resource is determined by control signaling indication information or pre-configuration, and the control The signaling indication information is sent by the eNB on the second radio resource of the authorized spectrum configured by the eNB for the UE; The processor is specifically configured to send the control signaling indication information to the UE through the second radio resource when the target device is an eNB, and then determine the control signaling indication information through the control signaling indication information. The third radio resource sends the control signaling to the UE, so that the UE receives the control signaling on the third radio resource determined by the control signaling indication information; when the target device When it is the master UE sending the control signaling, determine that the UE receiving the control signaling is a slave UE, receive the control signaling indication information sent by the eNB on the second radio resource, and then use the The third radio resource determined by the control signaling indication information sends the control signaling to the secondary UE, so that the secondary UE receives the third radio resource determined by the control signaling indication information. the control signaling. 8. The apparatus according to claim 7, wherein the processor is further configured to detect the signal quality of the unlicensed spectrum every predetermined time; if the detection result is that the signal quality of the unlicensed spectrum satisfies If the preset condition is used, the UE is instructed to use the D2D communication mode to implement data transmission; if the detection result is that the signal quality of the unlicensed spectrum does not meet the preset condition, the UE is instructed to implement data transmission in the cell communication mode, The cell communication mode refers to that the UE performs data transmission through the eNB. 9 . The apparatus according to claim 7 , wherein, if the target device is a master UE and the D2D communication mode is broadcast or multicast, the transmitter is further configured to send a message to the UE. 10 . After the control signaling, send data to at least one slave UE on the first radio resource through broadcast or multicast; if there is a slave UE that has not received the data, send data to the fourth radio resource of the licensed spectrum send the data to the slave UE again. 10. The apparatus according to any one of claims 7 to 9, wherein the processor is specifically configured to, if the target device is an eNB and there is no UE served by another eNB in the UE, Then determine the unlicensed spectrum in an available state, and use the first radio resource of the unlicensed spectrum selected from the determined unlicensed spectrum as the allocated first radio resource; if the target device is the main UE and There is no slave UE served by other eNBs in the slave UE, and the unlicensed spectrum resource pool allocated by the eNB is received, and the unlicensed spectrum resource pool includes the unlicensed spectrum in an available state, and the unlicensed spectrum resource pool will be retrieved from the unlicensed spectrum. The first radio resource of the unlicensed spectrum selected from the resource pool is used as the allocated first radio resource. 11. The apparatus according to any one of claims 7 to 9, wherein the processor is specifically configured to, if the target device is an eNB and there is at least one UE served by another eNB in the UE , then perform allocation negotiation with the other eNBs, and use the negotiated first radio resource of the unlicensed spectrum jointly occupied by the eNB and the other eNBs as the allocated first radio resource; if the target device is The master UE and there is at least one slave UE served by other eNBs in the slave UE, receive the unlicensed spectrum resource pool sent by the eNB serving the master UE, and the unlicensed spectrum resource pool is the eNB After the allocation negotiation with the other eNBs determines that they are jointly occupied, the first radio resource of the unlicensed spectrum selected from the unlicensed spectrum resource pool is used as the allocated first radio resource. 12. The apparatus according to any one of claims 7 to 9, wherein the processor is specifically configured to dynamically allocate the non-contact data to the UE for each data transmission using the D2D communication mode. the first radio resource of the licensed spectrum; or, assigning the UE the first radio resource of the unlicensed spectrum according to a pre-configured semi-static allocation strategy, wherein the semi-static allocation strategy is that each time the unlicensed spectrum is available The allocation strategy for the first radio resource of the unlicensed spectrum in the state. 13. A device communication method, characterized in that, used in a target device, the method comprising: when the unlicensed spectrum is in an available state, allocating a first radio resource of the unlicensed spectrum to the user equipment UE, where the unlicensed spectrum refers to a spectrum used by each radio access system for competition; Generate control signaling corresponding to the UE according to the allocated first radio resource, where the control signaling carries indication information for indicating the first radio resource, where the indication information is used to indicate the use of the first radio resource A time slot and frequency region used by the wireless resource to receive or transmit data; When the target device is an eNB, send the control signaling indication information to the UE through the second radio resource of the authorized spectrum configured for the UE by the evolved base station eNB, and then determine the control signaling indication information through the control signaling indication information. The third radio resource of the unlicensed spectrum sends the control signaling to the UE, so that the UE receives the control signaling on the third radio resource determined by the control signaling indication information, so that all the UE implements data transmission in the device-to-device D2D communication mode on the first radio resource determined according to the indication information, and the third radio resource is determined by control signaling indication information or pre-configuration; When the target device is the master UE that sends the control signaling, determine that the UE that receives the control signaling is a slave UE, and receives the control signaling indication sent by the eNB on the second radio resource information, and then send the control signaling to the secondary UE through the third radio resource determined by the control signaling indication information, so that the secondary UE can display the third radio resource determined by the control signaling indication information. The control signaling is received on the radio resource, so that the slave UE implements data transmission in the device-to-device D2D communication mode on the first radio resource determined according to the indication information. 14. The method of claim 13, wherein the method further comprises: detecting the signal quality of the unlicensed spectrum every predetermined time; If the detection result is that the signal quality of the unlicensed spectrum meets a preset condition, instructing the UE to implement data transmission in the D2D communication mode; If the detection result is that the signal quality of the unlicensed spectrum does not meet the preset condition, the UE is instructed to use a cell communication mode to implement data transmission, and the cell communication mode means that the UE performs data transmission through the eNB. 15 . The method according to claim 13 , wherein, if the target device is a master UE and the D2D communication mode is broadcast or multicast, after the control signaling is sent to the UE. 16 . ,Also includes: Send data to at least one slave UE on the first radio resource by broadcasting or multicasting; If there is a secondary UE that has not received the data, the data is sent to the secondary UE again on the fourth radio resource of the licensed spectrum. 16. The method according to any one of claims 13 to 15, wherein the allocating the first radio resource of the unlicensed frequency spectrum to the user equipment UE comprises: If the target device is an eNB and there is no UE served by other eNBs in the UE, determine the unlicensed spectrum in an available state, and use the third unlicensed spectrum selected from the determined unlicensed spectrum. a radio resource as the allocated first radio resource; If the target device is a master UE and there is no slave UE served by other eNBs in the slave UEs, receive an unlicensed spectrum resource pool allocated by the eNB, where the unlicensed spectrum resource pool includes unlicensed spectrum resources in an available state spectrum, the first radio resource of the unlicensed spectrum selected from the unlicensed spectrum resource pool is used as the allocated first radio resource. 17. The method according to any one of claims 13 to 15, wherein the allocating the first radio resource of the unlicensed frequency spectrum to the user equipment UE comprises: If the target device is an eNB and there is at least one UE served by other eNBs in the UE, perform allocation negotiation with the other eNBs, and use the negotiated unlicensed shared occupied by the eNB and the other eNBs. The first radio resource of the frequency spectrum is used as the allocated first radio resource; If the target device is a master UE and there is at least one slave UE served by another eNB in the slave UE, receive an unlicensed spectrum resource pool sent by the eNB serving the master UE, the unlicensed spectrum The resource pool is determined to be jointly occupied by the eNB and the other eNBs after the allocation negotiation, and the first radio resource of the unlicensed spectrum selected from the unlicensed spectrum resource pool is used as the allocated first radio resource . 18. The method according to any one of claims 13 to 15, wherein the allocating the first radio resource of the unlicensed spectrum for the user equipment UE comprises: For each data transmission using the D2D communication mode, dynamically allocate the first radio resource of the unlicensed spectrum to the UE; or, The UE is allocated the first radio resource of the unlicensed spectrum according to a preconfigured semi-static allocation strategy, wherein the semi-static allocation strategy is to allocate the first radio resource of the unlicensed spectrum to the unlicensed spectrum every time the unlicensed spectrum is available. A radio resource allocation strategy.