CN107071905B - Inter-device communication method, user equipment and base station - Google Patents

Abstract

Embodiments of the present invention provide an inter-device communication method, user equipment, and base station. The method includes: the first UE receives information indicating spectrum resources occupied by at least one partition from the base station; the first UE selects a first spectrum resource from a set of spectrum resources that the first UE can use for D2D communication, and uses the first spectrum resource. A spectrum resource performs D2D communication with the second UE, wherein the spectrum resource set is determined by the first UE according to spectrum occupancy information. In this embodiment of the present invention, the first UE can select the first spectrum resource from the set of spectrum resources that the first UE can use for D2D communication determined according to the spectrum occupancy information to perform D2D communication with the second UE, so that the existing network can be used for D2D communication. The spectrum resource realizes D2D communication and can improve the utilization rate of the spectrum resource.

Description

Inter-device communication method, user equipment and base station

technical field

The present invention relates to the field of communication, and in particular, to an inter-device communication method, user equipment and base station.

Background technique

With the rapid development of wireless communication, the generation of ultra-high-speed services (such as high-definition video) causes the load of wireless communication network to become heavier and heavier.

In order to reduce the load of the wireless communication network, the research on the communication mode between devices (Device to Device, D2D) has been paid more and more attention. In the D2D communication mode, the terminal can communicate directly with the terminal without forwarding by the base station, so the load of the base station can be reduced. However, how to use spectrum resources for D2D communication becomes a problem that needs to be considered.

SUMMARY OF THE INVENTION

The embodiments of the present invention provide an inter-device communication method, a user equipment and a base station, which effectively utilize the uplink spectrum resources of the existing network to realize D2D communication, and can improve the utilization rate of the uplink spectrum resources.

In one aspect, an inter-device communication method is provided, comprising: a first user equipment UE receiving spectrum occupancy information from a base station, where the spectrum occupancy information is used to indicate uplink spectrum resources occupied by at least one partition, and the at least one partition is for the Obtained by dividing the cells covered by the base station; the first UE selects the first uplink spectrum resource from the uplink spectrum resource set that the first UE can use for inter-device D2D communication, and uses the first uplink spectrum resource and the second The UE performs D2D communication, wherein the uplink spectrum resource set is determined by the first UE according to the spectrum occupancy information.

In another aspect, an inter-device communication method is provided, including: determining spectrum occupancy information, where the spectrum occupancy information is used to indicate uplink spectrum resources occupied by at least one partition, where the at least one partition is for dividing a cell covered by a base station obtained; send the spectrum occupancy information to the first user equipment UE, so that the first UE selects the first uplink spectrum resource from the set of uplink spectrum resources that the first UE can use for inter-device D2D communication, and uses the first uplink spectrum resource. The uplink spectrum resource performs D2D communication with the second UE, wherein the set of uplink spectrum resources is determined by the first UE according to the spectrum occupancy information.

In another aspect, a user equipment is provided, including: a receiving unit configured to receive spectrum occupancy information from a base station, where the spectrum occupancy information is used to indicate uplink spectrum resources occupied by at least one partition, where the at least one partition is for the base station It is obtained by dividing the covered cells; the communication unit is used to select a first uplink spectrum resource from the set of uplink spectrum resources that the first UE can use for inter-device D2D communication, and use the first uplink spectrum resource and the second uplink spectrum resource. The UE performs D2D communication, wherein the uplink spectrum resource set is determined by the first UE according to the spectrum occupancy information.

In another aspect, a base station is provided, including: a determining unit configured to determine spectrum occupancy information, where the spectrum occupancy information is used to indicate uplink spectrum resources occupied by at least one partition, where the at least one partition is a cell covered by the base station obtained by dividing; a sending unit, configured to send the spectrum occupancy information to the first user equipment UE, so that the first UE selects the first uplink spectrum from the set of uplink spectrum resources that the first UE can use for inter-device D2D communication resource, and use the first uplink spectrum resource to perform D2D communication with the second UE, where the uplink spectrum resource set is determined by the first UE according to the spectrum occupancy information.

In the embodiment of the present invention, since the spectrum occupancy information indicates the uplink spectrum resources occupied by at least one sub-area, and the at least one sub-area is obtained by dividing the cells covered by the base station, so that the first UE can obtain the uplink spectrum resources determined according to the spectrum occupancy information The first UE selects the first uplink spectrum resource from the set of uplink spectrum resources that can be used for D2D communication to perform D2D communication with the second UE, so that the uplink spectrum resources of the existing network can be effectively used to realize D2D communication, and the uplink spectrum resources can be improved. utilization rate.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings that need to be used in the embodiments of the present invention. Obviously, the drawings described below 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 any creative effort.

FIG. 1 is a schematic diagram of an example of a scenario to which an embodiment of the present invention may be applied.

FIG. 2 is a schematic flowchart of a D2D communication method according to an embodiment of the present invention.

FIG. 3 is a schematic flowchart of a D2D communication method according to an embodiment of the present invention.

FIG. 4 is a schematic flowchart of a process of a D2D communication method according to an embodiment of the present invention.

FIG. 5 is a schematic diagram of an example of partitioning applicable to the scene of FIG. 1 according to an embodiment of the present invention.

FIG. 6 is a schematic diagram of an example of uplink spectrum resource allocation applicable to the scenarios of FIG. 1 and FIG. 5 according to an embodiment of the present invention.

7 is a schematic diagram of an example of a format of spectrum occupancy information applicable to the example of FIG. 6 according to an embodiment of the present invention.

8 is a schematic diagram of another example of a format of spectrum occupancy information applicable to the example of FIG. 6 according to an embodiment of the present invention.

FIG. 9 is a schematic diagram of another example of a format of spectrum occupancy information applicable to the example of FIG. 6 according to an embodiment of the present invention.

FIG. 10 is a schematic diagram of an example of uplink spectrum resource division applicable to the scenario of FIG. 5 according to an embodiment of the present invention.

FIG. 11 is a schematic block diagram of a user equipment according to an embodiment of the present invention.

FIG. 12 is a schematic block diagram of a base station according to an embodiment of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

The technical solution of the present invention can be applied to various communication systems, such as: Global System of Mobile communication (GSM), Code Division Multiple Access (CDMA) system, Wideband Code Division Multiple Access (Wideband Multiple Access) Code Division Multiple Access Wireless, WCDMA), General Packet Radio Service (General Packet Radio Service, GPRS), Long Term Evolution (Long Term Evolution, LTE) and the like.

In this embodiment of the present invention, user equipment (User Equipment, UE), which may also be referred to as a mobile terminal (Mobile Terminal, MT), mobile user equipment, etc., can communicate with a wireless access network (for example, Radio Access Network, RAN) through a or multiple core networks, the user equipment may be a mobile terminal, such as a mobile phone (or "cellular" phone) and a computer with a mobile terminal, for example, may be portable, pocket-sized, hand-held, computer built-in or In-vehicle mobile devices.

In the embodiment of the present invention, the base station may be a base station (Base Transceiver Station, BTS) in GSM or CDMA, a base station (NodeB) in WCDMA, or an evolved base station (evolved Node B, eNB) in LTE or e-NodeB), the present invention is not limited.

FIG. 1 is a schematic diagram of an example of a scenario to which an embodiment of the present invention may be applied. It should be noted that the example in FIG. 1 is for helping those skilled in the art to better understand the embodiments of the present invention, rather than limiting the scope of the embodiments of the present invention.

In FIG. 1, it is assumed that the base station 110 covers three sectors 130a, 130b and 130c on a certain carrier. The base station 110 serves 8 UEs, and the 8 UEs are located in 3 sectors respectively. For example, UE 120a, UE 120b, and UE 120c are located in sector 130a. UE 120d and UE 120e are located in sector 130b. UE 120f, UE 120g, and UE 120h are located in sector 130c.

Among the 8 UEs, D2D communication can be performed between UEs with D2D capability. For example, assuming that UE 120a, UE 120b, and UE 120c all have D2D communication capabilities, UE 120a and UE 120b can communicate in D2D, UE 120a can also communicate with UE 120c, and UE 120b can communicate with UE 120c in D2D. In this way, data transmission between UEs with D2D communication capability can be performed through D2D communication without forwarding by the base station.

It should be noted that, for the convenience of description, FIG. 1 only describes three sectors of the base station on a certain carrier, but the embodiment of the present invention is not limited to this, and the base station may also have sectors on other carriers. In addition, the number of UEs served by the base station may also be less or more, which is also not limited in this embodiment of the present invention.

FIG. 2 is a schematic flowchart of a D2D communication method according to an embodiment of the present invention. The method of FIG. 2 is performed by the UE.

210. The first UE receives spectrum occupancy information from the base station, where the spectrum occupancy information is used to indicate uplink spectrum resources occupied by at least one partition, where the at least one partition is obtained by dividing a cell covered by the base station.

220. The first UE selects a first uplink spectrum resource from a set of uplink spectrum resources that the first UE can use for D2D communication, and uses the first uplink spectrum resource to perform D2D communication with the second UE, where the set of uplink spectrum resources is the first uplink spectrum resource. It is determined by the UE according to the spectrum occupancy information.

The first UE and the second UE can use the uplink spectrum resources for D2D communication. Since the uplink spectrum resources are used for the uplink communication between the UE and the base station, and the anti-interference ability of the base station is better than that of the UE, the use of the uplink spectrum resources for D2D communication can make the D2D communication possible. The interference to the communication between the UE and the base station in the existing network is reduced.

In the embodiment of the present invention, since the spectrum occupancy information indicates the uplink spectrum resources occupied by at least one sub-area, and the at least one sub-area is obtained by dividing the cells covered by the base station, so that the first UE can obtain the uplink spectrum resources determined according to the spectrum occupancy information The first UE selects the first uplink spectrum resource from the set of uplink spectrum resources that can be used for D2D communication to perform D2D communication with the second UE, so that the uplink spectrum resources of the existing network can be effectively used to realize D2D communication, and the uplink spectrum resources can be improved. utilization rate.

Optionally, as an embodiment, in step 210, the spectrum occupancy information may be used to indicate the uplink spectrum resources occupied by all partitions, or the spectrum occupancy information may be used to indicate the uplink spectrum resources occupied by the partition where the first UE is located and /or uplink spectrum resources occupied by the partition where the second UE is located, or the spectrum occupancy information may be used to indicate the uplink spectrum resources occupied by other partitions in all partitions except the partition where the first UE is located and/or the partition where the second UE is located spectrum resources.

Specifically, the base station may divide a cell covered by the base station on one carrier into multiple partitions. Then, the spectrum occupancy information received by the first UE from the base station may indicate uplink spectrum resources occupied by all partitions. Alternatively, the spectrum occupancy information may indicate the uplink spectrum resources occupied by the partition where the first UE is located, may also indicate the uplink spectrum resources occupied by the partition where the first UE is located, and the uplink spectrum resources occupied by the partition where the second UE is located, or may indicate the uplink spectrum resources occupied by the partition where the first UE is located. 2. Uplink spectrum resources occupied by the partition where the UE is located. Alternatively, the spectrum occupancy information may indicate the uplink spectrum resources occupied by other partitions in all partitions except the partition where the first UE is located, or may indicate other partitions in all partitions except the partition where the first UE is located and the partition where the second UE is located. The uplink spectrum resources occupied by the partition may also indicate the uplink spectrum resources occupied by other partitions in all partitions except the partition where the second UE is located.

Optionally, as another embodiment, in step 220, the uplink spectrum resource set may include uplink spectrum resources occupied by other partitions in all partitions except the partition where the first UE is located and/or the partition where the second UE is located.

Optionally, as another embodiment, in step 220, the first UE may select from the uplink spectrum resource set the uplink of other partitions that are not adjacent to the partition where the first UE is located and are not adjacent to the partition where the second UE is located. The spectrum resource is used as the first uplink spectrum resource. In this way, by excluding the uplink spectrum resources of the partition adjacent to the partition where the first UE is located and adjacent to the partition where the second UE is located, interference to other UEs and interference from other UEs can be minimized.

Optionally, as another embodiment, in step 210, the first UE may receive downlink control information (Downlink Control Information, DCI) from the base station through a physical downlink control channel (Physical Downlink Control Channel, PDCCH), where the DCI includes spectrum occupancy information. Alternatively, the first UE may receive DCI from the base station through the PDCCH, where the DCI is used to indicate the time-frequency resource position occupied by the spectrum occupancy information on the Physical Downlink Shared Channel (PDSCH), and receive the spectrum from the base station through the PDSCH according to the DCI Occupancy information. Alternatively, the first UE may receive spectrum occupancy information from the base station through a Physical Multicast Channel (Physical Multicast Channel, PMCH). Alternatively, the first UE may receive spectrum occupancy information from the base station through a physical broadcast channel (Physical Broadcast Channel, PBCH).

Optionally, as another embodiment, a 16-bit cyclic redundancy check (Cyclic Redundancy Check, CRC) may be attached to the end of the above-mentioned DCI, and the CRC may be performed by a radio network temporary identifier (Radio Network Temporary Identifier, RNTI) common to a group of UEs. Scrambling, the set of UEs includes the first UE. That is, the DCI including spectrum occupancy information received by the first UE through the PDCCH may be for a group of UEs including the first UE. Alternatively, the DCI received by the first UE through the PDCCH and used to indicate the time-frequency resource position occupied by the spectrum occupancy information on the PDSCH may be for a group of UEs including the first UE.

Optionally, as another embodiment, in step 210, the first UE may receive, from the base station, the spectrum occupancy sent by the base station in any subframe from the Nth subframe to the (N+k-1)th subframe. information, the spectrum occupancy information may be used to indicate the uplink spectrum resources occupied by at least one partition in the (N+k)th subframe, where N and k are positive integers. Usually, the base station has completed the uplink spectrum resource allocation of the (N+k)th subframe in the Nth subframe. Therefore, the base station can perform any subframe in the Nth subframe to the (N+k-1)th subframe. Send spectrum occupancy information in For a frequency division duplexing (Frequency Division Duplexing, FDD) system, k may be 4. For a Time Division Duplexing (TDD) system, k may be 4, 5, 6 or 7.

Optionally, as another embodiment, after step 220, when the first UE receives a negative acknowledgement (Negative Acknowledge, NACK) message from the second UE, the first UE may select the first UE from the uplink spectrum resource set. Two uplink spectrum resources, and use the second uplink spectrum resources to perform D2D communication with the second UE. For example, if other UEs performing D2D communication also select the first uplink spectrum resource, it will conflict with the D2D communication between the first UE and the second UE, resulting in the failure of the D2D communication between the first UE and the second UE . In this way, a Hybrid Automatic Repeat reQuest (HARQ) mechanism can be used. After the first UE receives the NACK message from the second UE, the first UE may reselect the second uplink spectrum resource, and perform data retransmission with the second UE through D2D communication, thereby solving the problem of resource conflict.

Optionally, as another embodiment, in step 220, the first UE may select the first uplink spectrum resource from a subset of the uplink spectrum resource set. For example, the uplink spectrum resource set may include multiple subsets, so that UEs performing D2D communication can select uplink spectrum resources from different subsets, which can avoid resource selection conflict among these UEs performing D2D communication.

Optionally, as another embodiment, in step 220, the first UE may generate a random number, and select the first uplink spectrum resource from the set of uplink spectrum resources according to the random number. In this way, the selection of the first uplink spectrum resource by the first UE is randomized, and resource selection conflict with other UEs performing D2D communication can be avoided.

Optionally, as another embodiment, in the above spectrum occupancy information, every m bit corresponds to an allocation unit, and the m bits are used to indicate the partition to which the allocation unit corresponding to the m bits belongs, and all allocations corresponding to the spectrum occupancy information. The cells are arranged in order, where m is a positive integer. Or, in the above spectrum occupancy information, every x bit corresponds to a partition, and the x bits are used to indicate at least one allocation unit occupied by the partition corresponding to the x bits, and all the partitions corresponding to the spectrum occupancy information are arranged in order, where x is a positive integer. Or, in the above spectrum occupancy information, each bit corresponds to an allocation unit, and the bit is used to indicate whether the allocation unit corresponding to the bit is occupied by the partition where the first UE is located and/or the partition where the second UE is located, and the spectrum occupancy information All corresponding allocation units are arranged in order. The above allocation unit may include multiple consecutive resource block groups (Resource Block Group, RBG).

In the embodiment of the present invention, since the spectrum occupancy information indicates the uplink spectrum resources occupied by at least one sub-area, and the at least one sub-area is obtained by dividing the cells covered by the base station, so that the first UE can obtain the uplink spectrum resources determined according to the spectrum occupancy information The first UE selects the first uplink spectrum resource from the set of uplink spectrum resources that can be used for D2D communication to perform D2D communication with the second UE, so that the uplink spectrum resources of the existing network can be effectively used to realize D2D communication, and the uplink spectrum resources can be improved. utilization rate.

FIG. 3 is a schematic flowchart of a D2D communication method according to an embodiment of the present invention. The method of FIG. 3 is performed by a base station.

310. Determine spectrum occupancy information, where the spectrum occupancy information is used to indicate uplink spectrum resources occupied by at least one partition, where the at least one partition is obtained by dividing a cell covered by the base station.

320. Send spectrum occupancy information to the first UE, so that the first UE selects a first uplink spectrum resource from a set of uplink spectrum resources that the first UE can use for D2D communication, and uses the first uplink spectrum resource to perform D2D with the second UE communication, wherein the uplink spectrum resource set is determined by the first UE according to the spectrum occupancy information.

In this embodiment of the present invention, since the spectrum occupancy information determined by the base station indicates the uplink spectrum resources occupied by at least one partition, and the at least one partition is obtained by dividing the cells covered by the base station, the first UE can The first UE determined by the information can select the first uplink spectrum resource from the set of uplink spectrum resources that can be used for D2D communication to perform D2D communication with the second UE, so that the uplink spectrum resources of the existing network can be effectively used to realize D2D communication, and the improvement can be improved. Utilization of uplink spectrum resources.

Optionally, as an embodiment, in step 310, the spectrum occupancy information may be used to indicate the uplink spectrum resources occupied by all partitions, or the spectrum occupancy information may be used to indicate the uplink spectrum resources occupied by the partition where the first UE is located and /or uplink spectrum resources occupied by the partition where the second UE is located, or the spectrum occupancy information may be used to indicate the uplink spectrum resources occupied by other partitions in all partitions except the partition where the first UE is located and/or the partition where the second UE is located spectrum resources.

Specifically, the base station may divide a cell covered by the base station on one carrier into multiple partitions. Then, the spectrum occupancy information received by the first UE from the base station may indicate uplink spectrum resources occupied by all partitions. Alternatively, the spectrum occupancy information may indicate the uplink spectrum resources occupied by the partition where the first UE is located, may also indicate the uplink spectrum resources occupied by the partition where the first UE is located, and the uplink spectrum resources occupied by the partition where the second UE is located, or may indicate the uplink spectrum resources occupied by the partition where the first UE is located. 2. Uplink spectrum resources occupied by the partition where the UE is located. Alternatively, the spectrum occupancy information may indicate the uplink spectrum resources occupied by other partitions in all partitions except the partition where the first UE is located, or may indicate other partitions in all partitions except the partition where the first UE is located and the partition where the second UE is located. The uplink spectrum resources occupied by the partition may also indicate the uplink spectrum resources occupied by other partitions in all partitions except the partition where the second UE is located.

Optionally, as another embodiment, in step 320, the uplink spectrum resource set may include uplink spectrum resources occupied by other partitions in all partitions except the partition where the first UE is located and/or the partition where the second UE is located.

Optionally, as another embodiment, in step 320, the base station may send DCI to the first UE through the PDCCH, where the DCI includes spectrum occupancy information. Alternatively, the base station may send DCI to the first UE through the PDCCH, where the DCI is used to indicate a time-frequency resource location occupied by the spectrum occupancy information on the PDSCH, and send the spectrum occupancy information to the first UE through the PDSCH. Alternatively, the base station may send spectrum occupancy information to a group of UEs including the first UE through the PMCH. Alternatively, the base station may send spectrum occupancy information to a group of UEs including the first UE through the PBCH.

Optionally, as another embodiment, a 16-bit CRC may be appended to the end of the above-mentioned DCI, and the CRC is scrambled by a RNTI common to a group of UEs, and the group of UEs includes the first UE. That is, the base station may transmit the DCI including the spectrum occupancy information to a group of UEs including the first UE through the PDCCH. Alternatively, the base station may send, to a group of UEs including the first UE, through the PDCCH, the DCI for indicating the position of the time-frequency resource occupied by the spectrum occupancy information on the PDSCH.

Optionally, as another embodiment, in step 320, the base station may send spectrum occupancy information to the first UE in any subframe from the Nth subframe to the (N+k-1)th subframe, and the spectrum The occupancy information is used to indicate uplink spectrum resources occupied by at least one partition in the (N+k)th subframe, where N and k are positive integers. Usually, the base station has completed the uplink spectrum resource allocation of the (N+k)th subframe in the Nth subframe. Therefore, the base station can perform any subframe in the Nth subframe to the (N+k-1)th subframe. Send spectrum occupancy information in For FDD format, k can be 4. For TDD, k can be 4, 5, 6 or 7.

Optionally, as another embodiment, in step 320, the base station may send spectrum occupancy information to a group of UEs including the first UE, where the group of UEs may be all UEs in the partition where the first UE is located, or a group of UEs. A group of UEs may be all UEs in multiple adjacent partitions including the partition where the first UE is located, or a group of UEs may be all UEs in all partitions, or a group of UEs may be all UEs in the partition where the first UE is located with D2D. capable UEs, or a group of UEs may be D2D capable UEs in multiple adjacent partitions including the partition where the first UE is located, or a group of UEs may be D2D capable UEs in all partitions, or a group of UEs may be All UEs within the angle where the beam-aligned first UE is located, or a group of UEs may be D2D capable UEs within the angle where the beam-aligned first UE is located.

Specifically, the base station may send spectrum occupancy information to all UEs in the partition where the first UE is located, may also send spectrum occupancy information to all UEs in multiple adjacent partitions including the partition where the first UE is located, or may send spectrum occupancy information to all the partitions All UEs of , send spectrum occupancy information. The base station may also send spectrum occupancy information to UEs with D2D capabilities in the partition where the first UE is located, and may also send spectrum occupancy information to UEs with D2D capabilities in multiple adjacent partitions including the partition where the first UE is located. The spectrum occupancy information is sent to D2D capable UEs in all partitions. This embodiment of the present invention does not limit this. In addition, if the base station supports directional functions such as smart antenna arrays or 3D (3-dimensional) waveform shaping (Beamforming, BF), the base station can send spectrum occupancy information to all UEs within the angle of the first UE whose beam is aligned, or can The spectrum occupancy information is sent to UEs with D2D communication capability within the angle of the beam aligned first UE.

Optionally, as another embodiment, before step 310, the base station may divide the cell covered by the base station into multiple partitions.

Optionally, as another embodiment, before step 310, the base station may divide the cell covered by the base station into multiple sector divisions according to the radiation angle of the antenna of the base station. Alternatively, the base station may divide the cell covered by the base station into multiple annular partitions according to the coverage of the base station.

Optionally, as another embodiment, the base station may evenly divide the cell covered by the base station into multiple partitions. For example, the base station may evenly divide the cell covered by the base station into a plurality of sectoral divisions according to the radiation angle of the antenna of the base station. The base station may also evenly divide the cells covered by the base station into a plurality of annular partitions according to the coverage of the base station.

Optionally, as another embodiment, in the above spectrum occupancy information, every m bit corresponds to an allocation unit, and the m bits are used to indicate the partition to which the allocation unit corresponding to the m bits belongs, and all allocations corresponding to the spectrum occupancy information. The cells are arranged in order, and m is a positive integer. Or, in the above spectrum occupancy information, every x bit corresponds to a partition, and the x bits are used to indicate at least one allocation unit occupied by the partition corresponding to the x bits, and all the partitions corresponding to the spectrum occupancy information are arranged in order, wherein x is a positive integer. Or, in the above spectrum occupancy information, each bit corresponds to an allocation unit, and the bit is used to indicate whether the allocation unit corresponding to the bit is occupied by the partition where the first UE is located and/or the partition where the second UE is located, and the spectrum occupancy information All corresponding allocation units are arranged in order. Wherein, the above allocation unit includes a plurality of consecutive RBGs.

In this embodiment of the present invention, since the spectrum occupancy information determined by the base station indicates the uplink spectrum resources occupied by at least one partition, and the at least one partition is obtained by dividing the cells covered by the base station, the first UE can The first UE determined by the information can select the first uplink spectrum resource from the set of uplink spectrum resources that can be used for D2D communication to perform D2D communication with the second UE, so that the uplink spectrum resources of the existing network can be effectively used to realize D2D communication, and the improvement can be improved. Utilization of uplink spectrum resources.

The embodiments of the present invention will be described in detail below with reference to specific examples. It should be noted that these examples are only for helping those skilled in the art to better understand the embodiments of the present invention, rather than limiting the scope of the embodiments of the present invention.

FIG. 4 is a schematic flowchart of a process of a D2D communication method according to an embodiment of the present invention. FIG. 4 will be described in detail below in conjunction with the scenario of FIG. 1 .

In FIG. 4, it is assumed that the first UE is UE 120a and the second UE is UE 120b. The base station may be base station 110 in FIG. 1 .

401. The base station 110 divides the cell covered by the base station 110 into multiple partitions.

The division of the plurality of partitions by the base station 110 may be a geographical division.

Optionally, the base station 110 may divide the cell covered by the base station into multiple sector divisions according to the radiation angle of the antenna of the base station 110 . For example, the base station 110 may divide the cell covered by the base station 110 into a plurality of sector divisions uniformly or non-uniformly.

Optionally, the base station 110 may divide the cell covered by the base station into multiple annular partitions according to the coverage of the base station 110 . For example, the base station 110 may divide the cell covered by the base station 110 into a plurality of annular partitions uniformly or non-uniformly.

After the base station 110 divides multiple partitions, each UE served by the base station 110 may have a partition identifier. For the UE located at the border of two partitions, two partition identifiers may be possessed, so that the base station does not need to be too precise in positioning the UE.

FIG. 5 is a schematic diagram of an example of partitioning applicable to the scene of FIG. 1 according to an embodiment of the present invention. In FIG. 5 , the same or similar parts as in FIG. 1 carry the same reference numerals as in FIG. 1 . In FIG. 5 , the base station 110 may divide a cell covered by a certain carrier of the base station 110 into 6 sectors according to the radiation angle of the antenna of the base station 110 . The base station 110 serves 8 UEs, and 3 UEs are located in the first partition, ie, UE 120a, UE 120b, and UE 120c. UE 120d is located in partition 3, UE 120e is located in partition 4, and UE 120f, UE 120g and UE 120h are located in partition 5. There are no UEs in the 2nd and 6th partitions. It should be noted that the example in FIG. 5 is for helping those skilled in the art to better understand the embodiments of the present invention, rather than limiting the scope of the embodiments of the present invention. For example, the base station may further divide the cell covered by the base station into multiple partitions in other manners, which is not limited in this embodiment of the present invention.

402. The base station 110 determines spectrum occupancy information, where the spectrum occupancy information is used to indicate uplink spectrum resources occupied by at least one partition.

Generally, the base station 110 has completed the uplink spectrum resource allocation of the (N+k)th subframe in the Nth subframe, and the uplink spectrum resource allocation in each subframe is different, then the spectrum occupancy information determined by the base station is used to indicate the (N+k)th subframe. N+k) uplink spectrum resources occupied by at least one partition in the subframe. where N and k are positive integers. For FDD format, k can be 4. For TDD, k can be 4, 5, 6 or 7.

FIG. 6 is a schematic diagram of an example of uplink spectrum resource allocation applicable to the scenarios of FIG. 1 and FIG. 5 according to an embodiment of the present invention. It is assumed that in the (N+k)th subframe, the base station 110 schedules 6 UEs, namely the UE 120c in the first partition, the UE 120d in the third partition, the UE 120e in the fourth partition, and the UE 120f in the fifth partition, UE 120g and UE 120h. As shown in FIG. 6, base station 110 allocates 2 clusters to both UE 120e and UE 120f. Base station 110 allocates 1 cluster to each of UE 120c, UE 120d, UE 120g, and UE 120h. Each cluster may include one or more contiguous allocation units. Each allocation unit may include multiple consecutive RBGs. In FIG. 6, it is assumed that each allocation unit may include P RBGs. An example of the value of P is shown in Table 1.

Table 1 The number P of RBGs in the allocation unit under different bandwidths

Optionally, the spectrum occupancy information may be used to indicate the uplink spectrum resources occupied by all partitions, or the spectrum occupancy information may be used to indicate the uplink spectrum resources occupied by the partition where the first UE is located and/or the uplink spectrum resources occupied by the partition where the second UE is located. The uplink spectrum resources, or the spectrum occupancy information may be used to indicate the uplink spectrum resources occupied by other partitions in all partitions except the partition where the first UE is located and/or the partition where the second UE is located.

Optionally, in the spectrum occupancy information, every m bit may correspond to an allocation unit, the m bits may be used to indicate the partition to which the allocation unit corresponding to the m bits belongs, and all the allocation units corresponding to the spectrum occupancy information are arranged in order. , where m is a positive integer.

Optionally, in the spectrum occupancy information, each x bits may correspond to one partition, and the x bits may be used to indicate at least one allocation unit occupied by the partition corresponding to the x bits, and all the partitions corresponding to the spectrum occupancy information are arranged in order. , where x is a positive integer.

Optionally, in the spectrum occupancy information, each bit corresponds to an allocation unit, and the bit can be used to indicate whether the allocation unit corresponding to the bit is occupied by the partition where the first UE is located and/or the partition where the second UE is located, and the spectrum All allocation units corresponding to the occupancy information are arranged in order. In this case, the spectrum occupancy information can be reduced to a Boolean number.

The format of the spectrum occupancy information in the embodiment of the present invention will be described in detail below with reference to specific examples. It should be noted that the following examples in FIGS. 7 to 9 are for helping those skilled in the art to better understand the embodiments of the present invention, rather than limiting the scope of the embodiments of the present invention.

7 is a schematic diagram of an example of a format of spectrum occupancy information applicable to the example of FIG. 6 according to an embodiment of the present invention. As shown in FIG. 7 , in the spectrum occupancy information, every 3 bits corresponds to an allocation unit, and the order of these allocation units is consistent with the allocation units in FIG. 6 . For example, in Figure 7, the first 3 bits "101" may indicate that the first allocation unit belongs to the 5th partition; the second 3 bits "011" may indicate that the second allocation unit belongs to the 3rd partition; the third 3 bits of "100" may indicate that the 3rd allocation unit belongs to the 4th partition. And so on.

8 is a schematic diagram of another example of a format of spectrum occupancy information applicable to the example of FIG. 6 according to an embodiment of the present invention.

As shown in FIG. 8 , in the spectrum occupancy information, every 6 bits corresponds to one partition. The six partitions corresponding to the spectrum information are arranged in order, that is, the order of the partitions in FIG. 5 is consistent. The allocation unit occupied by each 6-bit indication corresponding partition may be obtained through a predefined list or a predefined calculation method. For example, in Figure 8, it can be known from a predefined list that the first 6-bit "000110" can indicate that the allocation unit occupied by the first partition is the fourth-to-last allocation unit; the second 6-bit "000000" It can indicate that the second partition does not occupy the allocation unit; the third 6-bit "000011" can indicate that the allocation unit occupied by the third partition is the second allocation unit. And so on. It should be noted that the above numerical examples are only for helping those skilled in the art to better understand the embodiments of the present invention, rather than limiting the scope of the embodiments of the present invention.

FIG. 9 is a schematic diagram of another example of a format of spectrum occupancy information applicable to the example of FIG. 6 according to an embodiment of the present invention. As shown in FIG. 9 , in the spectrum occupancy information, each bit corresponds to an allocation unit. The order of all allocation units corresponding to all bits is consistent with the order of allocation units in FIG. 6 . Assuming that the bit is "0", it means that the allocation unit corresponding to the bit is not occupied by the first partition where the UE 120a and the UE 120b are located. When the bit is "1", it indicates that the allocation unit corresponding to the bit is occupied by the first partition.

403. The base station 110 sends the spectrum occupancy information determined in step 402 to the UE 120a.

Optionally, the base station 110 may send spectrum occupancy information to a group of UEs, where the group of UEs at least includes the UE 120a, or the group of UEs at least includes all UEs in the partition where the UE 120a is located.

The base station 110 may send spectrum occupancy information to a group of UEs including the first UE, where the group of UEs may be all UEs in the first partition where the UE 120a is located, or a group of UEs may be multiple adjacent UEs including the first partition. All UEs in the partition, or a group of UEs may be all UEs in all partitions, or a group of UEs may be D2D capable UEs in the first partition, or a group of UEs may be multiple adjacent ones including the first partition D2D capable UEs within a partition, or a group of UEs may be D2D capable UEs of all partitions, or a group of UEs may be all UEs within the angle of the beam-aligned UE 120a, or a group of UEs may be D2D capable UEs within the angle of the beam-aligned UE 120a.

Specifically, the base station 110 can send spectrum occupancy information to all UEs in the first partition, can also send spectrum occupancy information to all UEs in multiple adjacent partitions including the first partition, or can send spectrum occupancy information to all UEs in all partitions information. The base station 110 may also send spectrum occupancy information to UEs with D2D capabilities in the first partition, may also send spectrum occupancy information to UEs with D2D capabilities in multiple adjacent partitions including the first partition, or may send spectrum occupancy information to UEs with D2D capabilities in all partitions. The D2D capable UE sends spectrum occupancy information. This embodiment of the present invention does not limit this. If the base station 110 supports a directional function such as a smart antenna array or 3D BF, the base station 110 can send spectrum occupancy information to all UEs at the angle of the beam-aligned UE 120a or UEs with D2D communication capability.

Optionally, the base station 110 may send a message to the UE 120a in any subframe from the Nth subframe to the (N+k-1)th subframe to indicate that at least one partition in the (N+k)th subframe is located. Spectrum occupancy information of occupied uplink spectrum resources, where N and k are positive integers.

Alternatively, the base station 110 may send DCI to the UE 120a via the PDCCH, the DCI including the spectrum occupancy information. For example, the DCI may be in a format similar to DCI 3/3A. The DCI may be appended with a 16-bit CRC scrambled by a RNTI common to a group of UEs including UE 120a.

Optionally, the base station 110 may send DCI to the UE 120a through the PDCCH, where the DCI is used to indicate the time-frequency resource location occupied by the spectrum occupancy information on the PDSCH, and send the spectrum occupancy information to the first UE through the PDSCH. For example, the DCI may also indicate related information such as a modulation and coding scheme (Modulation and Coding Scheme, MCS) of the spectrum occupancy information. The DCI may be appended with a 16-bit CRC scrambled by a RNTI common to a group of UEs including UE 120a.

Optionally, base station 110 may transmit spectrum occupancy information to a group of UEs including UE 120a via the PMCH.

Optionally, base station 110 may transmit spectrum occupancy information to a group of UEs including UE 120a via the PBCH.

404, the UE 120a determines, according to the spectrum occupancy information in step 403, a set of uplink spectrum resources that the UE 120a can use for D2D communication.

Optionally, the UE 120a may determine an uplink spectrum resource set according to the spectrum occupancy information, and the uplink spectrum resource set may include the uplink spectrum resources occupied by other partitions in all partitions except the partition where the UE 120a is located and/or the partition where the UE 120b is located. .

In FIG. 4 , both the UE 120a and the UE 120b are in the first partition, so the uplink spectrum resource set may include the uplink spectrum resources occupied by the second partition to the sixth partition.

405. The UE 120a selects a first uplink spectrum resource from the set of uplink spectrum resources.

Optionally, the UE 120a may select the first uplink spectrum resource from the uplink spectrum resources occupied by the second to sixth partitions.

Optionally, the UE 120a may select the first uplink spectrum resource from the uplink spectrum resources occupied by the third to fifth partitions. In this way, interference with other UEs can be avoided to the greatest extent by excluding the uplink spectrum resources of the adjacent partitions of the first partition.

In addition, if the UE 120a and the UE 120b are located in different partitions, for example, the UE 120b is located in the second partition, the UE 120a can select the first uplink spectrum resource from the uplink spectrum resources occupied by the third to sixth partitions. Further, the UE 120a may select the first uplink spectrum resource from the uplink spectrum resources occupied by the fourth partition and the fifth partition. In this way, interference with other UEs can be avoided to the greatest extent by excluding the uplink spectrum resources of the adjacent partitions to the first partition and the second partition.

Optionally, UE 120a may select the first uplink spectrum resource from a subset of the set of uplink spectrum resources. The uplink spectrum resource set may include multiple subsets. The UE 120a may select the first uplink spectrum resource from a certain subset to avoid interference with other UEs to perform D2D communication. For example, if the UE 120c wants to perform D2D communication with the UE 120d, the uplink spectrum resource may be selected from another subset of the uplink spectrum resource set, so as to avoid conflict with the first uplink spectrum resource selected by the UE 120a.

FIG. 10 is a schematic diagram of an example of uplink spectrum resource division applicable to the scenario of FIG. 5 according to an embodiment of the present invention. In FIG. 10 , the uplink spectrum resources of the first partition may continue to be divided, and may include multiple subsets. For example, the UE 120a may use the uplink spectrum resources of the third partition according to its location. In this way, the selection of the same uplink spectrum resource with other UEs to perform D2D communication can be avoided to the greatest extent.

Optionally, the UE 120a may generate a random number, and select the first uplink spectrum resource from the set of uplink spectrum resources according to the random number. In this way, the selection of uplink spectrum resources can be randomized, and the selection of the same uplink spectrum resources with other UEs to perform D2D communication can be avoided, thereby avoiding the conflict of uplink spectrum resources.

406, the UE 120a uses the first uplink spectrum resource selected in step 405 to perform D2D communication with the UE 120b.

407. If the D2D communication between the UE 120a and the UE 120b fails, the UE 120b sends a NACK message to the UE 120a.

For example, if the first uplink spectrum resource is selected by the UE 120a and other UEs to perform D2D communication, a resource conflict occurs, and the D2D communication between the UE 120a and the UE 120b fails. The UE 120b may send a NACK message to the UE 120a, ie, to notify the UE 120a of the failure of data transmission over the D2D communication link.

408, the UE 120a selects a second uplink spectrum resource from the set of uplink spectrum resources.

409, the UE 120a uses the second uplink spectrum resource selected in step 408 to perform D2D communication with the UE 120b.

The UE 120a may use the second uplink spectrum resource to perform data retransmission to the UE 120b through the D2D communication link.

It should be understood that the size of the sequence numbers of the above processes does not mean the sequence of execution, and the execution sequence of each process should be determined by its function and internal logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.

In the embodiment of the present invention, since the spectrum occupancy information indicates the uplink spectrum resources occupied by at least one sub-area, and the at least one sub-area is obtained by dividing the cells covered by the base station, so that the first UE can obtain the uplink spectrum resources determined according to the spectrum occupancy information The first UE selects the first uplink spectrum resource from the set of uplink spectrum resources that can be used for D2D communication to perform D2D communication with the second UE, so that the uplink spectrum resources of the existing network can be effectively used to realize D2D communication, and the uplink spectrum resources can be improved. utilization rate.

FIG. 11 is a schematic block diagram of a user equipment according to an embodiment of the present invention. The user equipment 1100 of FIG. 11 includes a receiving unit 1110 and a communication unit 1120 .

The receiving unit 1110 receives spectrum occupancy information from the base station, where the spectrum occupancy information is used to indicate uplink spectrum resources occupied by at least one partition, and the at least one partition is obtained by dividing a cell covered by the base station. The communication unit 1120 selects a first uplink spectrum resource from a set of uplink spectrum resources that the first UE can use for D2D communication, and uses the first uplink spectrum resource to perform D2D communication with a second UE, where the set of uplink spectrum resources is the first UE according to Spectrum occupancy information is determined.

In the embodiment of the present invention, since the spectrum occupancy information indicates the uplink spectrum resources occupied by at least one sub-area, and the at least one sub-area is obtained by dividing the cells covered by the base station, so that the first UE can obtain the uplink spectrum resources determined according to the spectrum occupancy information The first UE selects the first uplink spectrum resource from the set of uplink spectrum resources that can be used for D2D communication to perform D2D communication with the second UE, so that the uplink spectrum resources of the existing network can be effectively used to realize D2D communication, and the uplink spectrum resources can be improved. utilization rate.

For other functions and operations of the user equipment 1100, reference may be made to the processes involving the UE in the method embodiments in FIG. 2 and FIG. 4 to FIG. 10 above, and in order to avoid repetition, details are not repeated here.

Optionally, as an embodiment, the spectrum occupancy information may be used to indicate the uplink spectrum resources occupied by all partitions, or the spectrum occupancy information may be used to indicate the uplink spectrum resources occupied by the partition where the first UE is located and/or the partition where the second UE is located. The occupied uplink spectrum resources or the spectrum occupancy information may be used to indicate the uplink spectrum resources occupied by other partitions in all partitions except the partition where the first UE is located and/or the partition where the second UE is located.

Optionally, as another embodiment, the uplink spectrum resource set may include uplink spectrum resources occupied by other partitions in all partitions except the partition where the first UE is located and/or the partition where the second UE is located.

Optionally, as another embodiment, the communication unit 1120 may select, from the uplink spectrum resource set, uplink spectrum resources of other partitions that are not adjacent to the partition where the first UE is located and are not adjacent to the partition where the second UE is located, as the first Uplink spectrum resources.

Optionally, as another embodiment, in the above spectrum occupancy information, every m bit may correspond to one allocation unit, the m bits may be used to indicate the partition to which the allocation unit corresponding to the m bits belongs, and all allocation units corresponding to the spectrum occupancy information. are arranged in order, where m is a positive integer; or, in the above spectrum occupancy information, each x bits may correspond to one partition, and x bits may be used to indicate at least one allocation unit occupied by the partition corresponding to x bits, and the spectrum occupancy All partitions corresponding to the information are arranged in order, where x is a positive integer; or, in the above spectrum occupancy information, each bit may correspond to an allocation unit, and the bit may be used to indicate whether the allocation unit corresponding to the bit is used by the first UE. The partition where the partition is located and/or the partition where the second UE is located is occupied, and all allocation units corresponding to the spectrum occupancy information are arranged in order; wherein, the above-mentioned allocation units include multiple consecutive RBGs.

Optionally, as another embodiment, the receiving unit 1110 may receive DCI from the base station through the PDCCH, where the DCI may include spectrum occupancy information; or may receive DCI from the base station through the PDCCH, where the DCI may be used to indicate that the spectrum occupancy information is on the PDSCH occupied time-frequency resource location, and receive spectrum occupancy information from the base station through PDSCH according to the DCI; alternatively, spectrum occupancy information can be received from the base station through PMCH; or spectrum occupancy information can be received from the base station through PBCH.

Optionally, as another embodiment, a 16-bit CRC may be appended to the end of the above-mentioned DCI, and the CRC may be scrambled by a common RNTI of a group of UEs, and a group of UEs may include the first UE.

Optionally, as another embodiment, the receiving unit 1110 may receive, from the base station, spectrum occupancy information sent by the base station in any subframe from the Nth subframe to the (N+k-1)th subframe, the spectrum occupancy information. It is used to indicate the uplink spectrum resources occupied by at least one partition in the (N+k)th subframe, where N and k are positive integers.

Optionally, as another embodiment, the communication unit 1120 may further select a second uplink spectrum resource from the set of uplink spectrum resources when the first UE receives a NACK message from the second UE, and use the second uplink spectrum The resource performs D2D communication with the second UE.

Optionally, as another embodiment, the communication unit 1120 may select the first uplink spectrum resource from a subset of the uplink spectrum resource set.

Optionally, as another embodiment, the communication unit 1120 may generate a random number, and select the first uplink spectrum resource from the set of uplink spectrum resources according to the random number.

In this embodiment of the present invention, since the spectrum occupancy information indicates the uplink spectrum resources occupied by at least one sub-area, and the at least one sub-area is obtained by dividing the cells covered by the base station, the first UE can determine from the spectrum occupancy information according to the spectrum occupancy information. The first UE selects the first uplink spectrum resource from the set of uplink spectrum resources that can be used for D2D communication to perform D2D communication with the second UE, so that the uplink spectrum resources of the existing network can be effectively used to realize D2D communication, and the uplink spectrum resources can be improved. utilization rate.

FIG. 12 is a schematic block diagram of a base station according to an embodiment of the present invention. The base station 1200 of FIG. 12 includes a determination unit 1210 and a transmission unit 1220 .

The determining unit 1210 determines spectrum occupancy information, where the spectrum occupancy information is used to indicate uplink spectrum resources occupied by at least one partition, and the at least one partition is obtained by dividing a cell covered by a base station. The sending unit 1220 sends spectrum occupancy information to the first UE, so that the first UE selects the first uplink spectrum resource from the set of uplink spectrum resources that the first UE can use for D2D communication, and uses the first uplink spectrum resource to communicate with the second UE. D2D communication, wherein the uplink spectrum resource set is determined by the first UE according to spectrum occupancy information.

In this embodiment of the present invention, since the spectrum occupancy information determined by the base station indicates the uplink spectrum resources occupied by at least one partition, and the at least one partition is obtained by dividing the cells covered by the base station, the first UE can The first UE determined by the information can select the first uplink spectrum resource from the set of uplink spectrum resources that can be used for D2D communication to perform D2D communication with the second UE, so that the uplink spectrum resources of the existing network can be effectively used to realize D2D communication, and the improvement can be improved. Utilization of uplink spectrum resources.

For other functions and operations of the base station 1200, reference may be made to the processes involved in the base station in the method embodiments of FIG. 3 to FIG. 10 above, which are not repeated here to avoid repetition.

Optionally, as an embodiment, the spectrum occupancy information may be used to indicate the uplink spectrum resources occupied by all partitions, or the spectrum occupancy information may be used to indicate the uplink spectrum resources occupied by the partition where the first UE is located and/or the partition where the second UE is located. The occupied uplink spectrum resources or the spectrum occupancy information may be used to indicate the uplink spectrum resources occupied by other partitions in all partitions except the partition where the first UE is located and/or the partition where the second UE is located.

Optionally, as another embodiment, the uplink spectrum resource set may include uplink spectrum resources occupied by other partitions in all partitions except the partition where the first UE is located and/or the partition where the second UE is located.

Optionally, as another embodiment, in the above spectrum occupancy information, every m bit may correspond to one allocation unit, the m bits may be used to indicate the partition to which the allocation unit corresponding to the m bits belongs, and all the corresponding spectrum occupancy information. The allocation units are arranged in order, where m is a positive integer; or, in the above spectrum occupancy information, each x bit may correspond to a partition, and the x bits may be used to indicate at least one allocation unit occupied by the partition corresponding to the x bits, And all the partitions corresponding to the spectrum occupancy information are arranged in order, where x is a positive integer; or, in the above-mentioned spectrum occupancy information, each bit may correspond to an allocation unit, and the bit may be used to indicate whether the allocation unit corresponding to the bit is used. The partition where the first UE is located and/or the partition where the second UE is located is occupied, and all allocation units corresponding to the spectrum occupancy information are arranged in order; wherein, the above-mentioned allocation units may include multiple consecutive RBGs.

Optionally, as another embodiment, the sending unit 1220 may send DCI to the first UE through the PDCCH, where the DCI may include spectrum occupancy information; or, may send the DCI to the first UE through the PDCCH, where the DCI may be used to indicate spectrum occupancy The time-frequency resource position occupied by the information on the PDSCH, and the spectrum occupancy information is sent to the first UE through the PDSCH; or, the spectrum occupancy information can be sent to a group of UEs including the first UE through the PMCH; A group of UEs of the first UE sends spectrum occupancy information.

Optionally, as another embodiment, a 16-bit CRC may be appended to the end of the above-mentioned DCI, and the CRC is scrambled by a RNTI common to a group of UEs, and the group of UEs includes the first UE.

Optionally, as another embodiment, the sending unit 1220 may send spectrum occupancy information to the first UE in any subframe from the Nth subframe to the (N+k-1)th subframe, and the spectrum occupancy information is available is used to indicate the uplink spectrum resources occupied by at least one partition in the (N+k)th subframe, where N and k are positive integers.

Optionally, as another embodiment, the sending unit 1220 may send spectrum occupancy information to a group of UEs including the first UE, where the group of UEs are all UEs in the partition where the first UE is located, or a group of UEs include All UEs in multiple adjacent partitions of the partition where the first UE is located, or a group of UEs are all UEs in all partitions, or a group of UEs are D2D capable UEs in the partition where the first UE is located, or a group of UEs are Including D2D-capable UEs in multiple adjacent partitions of the partition where the first UE is located, or a group of UEs are D2D-capable UEs in all partitions, or a group of UEs are within the angle of the beam-aligned first UE All UEs of , or a group of UEs are UEs with D2D capability within the angle where the first UE with beam alignment is located.

Optionally, as another embodiment, the base station 1200 may further include a dividing unit 1230, configured to divide the cell covered by the base station into multiple partitions before determining the spectrum occupancy information.

Optionally, as another embodiment, the dividing unit 1230 may divide the cell covered by the base station into multiple sector-shaped divisions according to the radiation angle of the antenna of the base station; or, may divide the cell covered by the base station according to the coverage of the base station. Divided into multiple ring partitions.

Optionally, as another embodiment, the dividing unit 1230 may evenly divide the cell covered by the base station into multiple partitions.

In this embodiment of the present invention, since the spectrum occupancy information determined by the base station indicates the uplink spectrum resources occupied by at least one partition, and the at least one partition is obtained by dividing the cells covered by the base station, the first UE can The first UE determined by the information can select the first uplink spectrum resource from the set of uplink spectrum resources that can be used for D2D communication to perform D2D communication with the second UE, so that the uplink spectrum resources of the existing network can be effectively used to realize D2D communication, and the improvement can be improved. Utilization of uplink spectrum resources.

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 is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, 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 (ROM, Read-Only Memory), Random Access Memory (RAM, Random Access Memory), 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 thereto. 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 (28)

1. An inter-device communication method, comprising:

the method comprises the steps that first User Equipment (UE) receives information used for indicating uplink frequency spectrum resources occupied by at least one partition from a base station, wherein the at least one partition is obtained by dividing a cell covered by the base station geographically;

the first UE determines an uplink frequency spectrum resource set capable of being used for D2D communication between devices according to the information;

the first UE selects a first uplink spectrum resource from the set of uplink spectrum resources and communicates with a second UE in D2D using the first uplink spectrum resource.

2. The method of claim 1, wherein the first UE selecting a first uplink spectrum resource from the set of uplink spectrum resources comprises:

the first UE selecting the first uplink spectrum resource from a subset of the set of uplink spectrum resources; and/or the presence of a gas in the gas,

and the first UE selects the first uplink frequency spectrum resource from the uplink frequency spectrum resource set according to the generated random number.

3. The method of claim 1, wherein the information is used to indicate uplink spectrum resources occupied by the partition where the first UE is located.

4. The method of claim 2, wherein the information is used to indicate uplink spectrum resources occupied by the partition where the first UE is located.

5. The method of any of claims 1-4, wherein the first UE receives the information from a base station, comprising:

and receiving the information from the base station through a Physical Downlink Shared Channel (PDSCH) according to the Downlink Control Information (DCI).

6. The method of claim 5, wherein prior to receiving the information from the base station via the PDSCH according to the DCI, further comprising:

and the first UE receives the DCI from the base station through a Physical Downlink Control Channel (PDCCH), wherein the DCI is used for indicating the time-frequency resource position occupied by the information on the PDSCH.

7. The method according to any of claims 1 to 4, wherein the partition has a partition identifier, the first UE has a partition identifier of a partition in which the first UE is located, and/or the set of uplink spectrum resources is a set of uplink spectrum resources corresponding to the partition in which the first UE is located.

8. An inter-device communication method, comprising:

the method comprises the steps that a base station determines information used for indicating uplink spectrum resources occupied by at least one partition, wherein the information is used for indicating an uplink spectrum resource set which can be used for D2D communication between devices by a first User Equipment (UE), and the at least one partition is obtained by dividing a cell covered by the base station geographically;

the base station sends the information to the first UE.

9. The method of claim 8, wherein the information is used to indicate uplink spectrum resources occupied by the partition where the first UE is located.

10. The method according to claim 8, wherein the partition has a partition identifier, the first UE has the partition identifier of the partition where the first UE is located, and/or the uplink spectrum resource set is the uplink spectrum resource set corresponding to the partition where the first UE is located.

11. The method according to claim 9, wherein the partition has a partition identifier, the first UE has the partition identifier of the partition where the first UE is located, and/or the uplink spectrum resource set is the uplink spectrum resource set corresponding to the partition where the first UE is located.

12. The method according to any of claims 8 to 11, wherein the base station sends the information to the first UE, comprising:

transmitting the information to the first UE through a PDSCH.

13. The method of claim 12, wherein prior to transmitting the information to the first UE via the PDSCH, further comprising:

and the base station sends DCI to the first UE through the PDCCH, wherein the DCI is used for indicating the time-frequency resource position occupied by the information on the PDSCH.

14. A user device, comprising:

a receiving unit, configured to receive, from a base station, information indicating an uplink spectrum resource occupied by at least one partition, where the at least one partition is obtained by geographically dividing a cell covered by the base station;

a communication unit, configured to determine, according to the information, a set of uplink spectrum resources that can be used for inter-device D2D communication, and select a first uplink spectrum resource from the set of spectrum resources, and perform D2D communication with a second UE using the first uplink spectrum resource.

15. The UE of claim 14, wherein the communication unit is specifically configured to select the first uplink spectrum resource from a subset of the set of uplink spectrum resources; and/or the presence of a gas in the gas,

the communication unit is specifically configured to select the first uplink spectrum resource from the uplink spectrum resource set according to the generated random number.

16. The UE of claim 14, wherein the information is used to indicate uplink spectrum resources occupied by the partition where the first UE is located.

17. The UE of claim 15, wherein the information is used to indicate uplink spectrum resources occupied by the partition where the first UE is located.

18. The UE of any one of claims 14 to 17, wherein the receiving unit is specifically configured to receive the information from the base station via PDSCH according to DCI.

19. The UE of claim 18, wherein the receiving unit is further configured to: receiving the DCI from the base station through a PDCCH, wherein the DCI is used for indicating the time-frequency resource position occupied by the information on the PDSCH.

20. The UE according to any one of claims 14 to 17, wherein the partition has a partition identifier, the first UE has the partition identifier of the partition where the first UE is located, and/or the set of uplink spectrum resources is a set of uplink spectrum resources corresponding to the partition where the first UE is located.

21. A base station, comprising:

a determining unit, configured to determine information indicating uplink spectrum resources occupied by at least one partition, where the information is used to indicate an uplink spectrum resource set that a first UE can use for inter-device D2D communication, and the at least one partition is a partition obtained by geographically dividing a cell covered by the base station;

a sending unit, configured to send the information to the first user equipment UE.

22. The base station of claim 21, wherein the information is used to indicate uplink spectrum resources occupied by the partition where the first UE is located.

23. The base station of claim 21, wherein the partition has a partition identifier, the first UE has the partition identifier of the partition where the first UE is located, and/or the uplink spectrum resource set is an uplink spectrum resource set corresponding to the partition where the first UE is located.

24. The base station of claim 22, wherein the partition has a partition identifier, the first UE has the partition identifier of the partition where the first UE is located, and/or the uplink spectrum resource set is an uplink spectrum resource set corresponding to the partition where the first UE is located.

25. The base station according to any of claims 21 to 24, wherein said transmitting unit is specifically configured to transmit said information to said first UE via PDSCH.

26. The base station of claim 25, wherein the sending unit is further configured to:

sending DCI to the first UE through the PDCCH, wherein the DCI is used for indicating the time-frequency resource position occupied by the information on the PDSCH.

27. A computer readable storage medium storing a computer program which, when executed, implements the method of any of claims 1 to 7.

28. A computer readable storage medium storing a computer program which, when executed, implements the method of any of claims 8 to 13.

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