CN110972294B - Method and apparatus for transmitting random access signal - Google Patents

Abstract

The application provides a method and a device for transmitting a random access signal, and provides a configuration scheme for the transmission of the random access signal in an unlicensed spectrum scene. The terminal equipment receives system information from the network equipment, wherein the system information is used for indicating one or more of a transmission period, a transmission format and a system frame number of a random access signal; the terminal equipment receives first control information from the network equipment, wherein the first control information is used for indicating a subframe number or a time slot number or a starting Orthogonal Frequency Division Multiplexing (OFDM) symbol of a transmission random access signal.

Description

Method and apparatus for transmitting random access signal

technical field

The present application relates to the field of wireless communication technologies, and in particular, to a method and apparatus for transmitting random access signals.

Background technique

In a wireless communication system, to access a network, a terminal device needs to first obtain downlink synchronization with a cell through a cell search procedure, and then establish a connection with a cell and obtain uplink synchronization through a random access procedure. The random access process first requires the terminal equipment to send random access signals at specific time-frequency resource positions, and these specific time-frequency resource positions are configured by the network equipment and indicated to the terminal equipment.

At present, the physical random access channel (PRACH) configuration table under the licensed spectrum is defined in the discussion of new radio (NR), which includes the time-frequency resource location where the terminal device sends the random access signal. Configuration. Different from the licensed spectrum scenario, in the unlicensed spectrum scenario, the data transmission of the network device or terminal device is based on the listen before talk (LBT) mechanism, that is, before sending data, the network device or terminal device needs to first. Monitor the channel. Only when the channel monitoring is successful, there is a chance to perform downlink or uplink transmission of data. The LBT results are often uncertain. Therefore, the relevant configuration in the PRACH table in the licensed spectrum scenario cannot be directly applied in the unlicensed spectrum scenario. Therefore, for the license-free spectrum scenario in NR, a special configuration scheme needs to be designed.

SUMMARY OF THE INVENTION

The present application provides a method and apparatus for transmitting random access signals, and provides a configuration scheme for the transmission of random access signals in an unlicensed spectrum scenario.

In a first aspect, the present application provides a method for transmitting a random access signal, the method comprising: a terminal device receiving system information from a network device, where the system information is used to indicate a transmission period, a transmission format and a system frame number of the random access signal One or more of: the terminal device receives the first control information from the network device, where the first control information is used to indicate the subframe number or time slot number or the starting OFDM symbol for transmitting the random access signal .

In the technical solution of the present application, the network device indicates one or more of the transmission period, transmission format or system frame number of the random access signal to the terminal device through the system information. Further, according to the result of channel monitoring, the network device indicates to the terminal device the subframe number or time slot number or start symbol for transmitting the random access signal through the first control information. In this way, the subframe number or time slot number or start symbol indicated by the network device to the terminal device is configured based on the result of channel monitoring, so it can be applied to random access in an unlicensed spectrum scenario.

With reference to the first aspect, in some implementations of the first aspect, the method further includes: the terminal device determines, according to the system information and the first control information, a first time unit for sending the random access signal in the first cycle, and the first The cycle is any one of the transmission cycles of the random access signal indicated by the system information, and the first cycle includes at least two time units; the terminal device monitors the channel on at least two time units included in the first cycle; When monitoring the channel on the second time unit before the first time unit in the cycle succeeds, the terminal device determines the second time unit as the time unit for sending the random access signal in the first cycle.

In this embodiment, after the terminal device determines the time unit for transmitting the random access signal in the first cycle according to the system information and the first control information, it adjusts the time unit for transmitting the random access signal according to the LBT result.

With reference to the first aspect, in some implementations of the first aspect, the method further includes: the terminal device determines, according to the system information and the first control information, a first time unit for sending the random access signal in the first cycle, and the first The period is any one of the transmission periods of the random access signal indicated by the system information, and the first period includes at least two time units; when monitoring the channel on the first time unit within the first period fails, the terminal device will be located in the The third time unit after the first time unit and adjacent to the first time unit is determined as the time unit in which the random access signal is sent in the first period.

With reference to the first aspect, in some implementations of the first aspect, the method further includes: the terminal device receives adjustment information from the network device, where the adjustment information is used to indicate a first time unit in which the random access signal is to be transmitted in the first period The adjustment is the fourth time unit, and the fourth time unit is located in the first period.

Further, the method further includes: according to the adjustment information, the terminal device determines the fourth time unit as the time unit for transmitting the random access signal in the first period.

In this embodiment, the network device instructs the terminal device to adjust the time unit according to the LBT result after indicating to the terminal device the time unit for transmitting the random access signal in the first cycle through the system information and the first control information.

With reference to the first aspect, in some implementations of the first aspect, the random access signal has multiple candidate transmission formats, and each candidate transmission format in the multiple candidate transmission formats is in a configuration table of the random access signal The proportion is determined according to the duration of sending the random access signal corresponding to each candidate transmission format.

With reference to the first aspect, in some implementations of the first aspect, the first control information is specifically used to indicate the index of one or more subframe numbers for transmitting the random access signal, and the index of the one or more subframe numbers is absolute The subframe number or the index of the relative subframe number; or, the first control information is specifically used to indicate the index of one or more time slot numbers for transmitting the random access signal, and the index of the one or more time slot numbers is an absolute time a slot number or an index relative to a time slot number; or, the first control information is specifically used to indicate the index of one or more OFDM symbols that transmit the random access signal, and the index of the one or more OFDM symbols is an absolute OFDM symbol or an index relative to the OFDM symbol.

With reference to the first aspect, in some implementations of the first aspect, the method further includes: receiving, from the network device, channel occupation time COT information, where the COT information is used to indicate the information of the transmission time period preempted by the network device, and the transmission The information of the time period includes the start time of the transmission time period and/or the duration of the transmission time period.

With reference to the first aspect, in some implementations of the first aspect, the method further includes: when the first control information is used to indicate an index of a relative subframe number for transmitting a random access signal, the terminal device according to the COT information and The index of the relative subframe number determines the absolute subframe number for transmitting the random access signal; or, when the first control information is used to indicate the index of the relative time slot number for transmitting the random access signal, the terminal device according to the COT information and The index of the relative slot number determines the absolute slot number in which the random access signal is transmitted.

In the unlicensed spectrum scenario, due to the influence of channel access uncertainty on the unlicensed spectrum (that is, the randomness of the LBT result), the network device cannot predict on which subframe the LBT will succeed. As a result, the random access signal cannot actually be sent at the absolute subframe or absolute time slot position that is blindly configured or semi-statically configured by the network device. In this application, the relative subframe number or relative time slot number configured by the network device is the relative time in the transmission time period successfully preempted by the LBT. Therefore, the relative time is the time domain that can be used to send random access signals. Therefore, the transmission efficiency of the random access signal can be improved.

With reference to the first aspect, in some implementations of the first aspect, the COT information includes one or more bits, and the terminal device receives the COT information from the network device, including: the terminal device receives the demodulation of the physical broadcast channel PBCH from the network device The reference signal DMRS or the tracking reference signal TRS, the DMRS or TRS of the PBCH carries the COT information; or, the terminal device receives the second control information from the network device, and the second control information carries the COT information.

Specifically, when the number of bits of COT information is small, the network device can carry it through PBCH DMRS and TRS. When the number of bits of the COT information is large, the network device may carry the second control information.

Optionally, the second control information may be carried by a downlink control channel. Further optionally, the second control information may be common control information. Common control information refers to control information common to all terminal devices in the cell where the terminal device is located.

In a second aspect, the present application provides a method for transmitting a random access signal. The method includes: a network device sends system information to a terminal device, where the system information is used to indicate the transmission period, transmission format and system frame number of the random access signal. One or more of: the network device sends first control information to the terminal device, where the first control information is used to indicate the subframe number or time slot number or the starting OFDM symbol for transmitting the random access signal.

With reference to the second aspect, in some implementations of the second aspect, the method further includes: the network device sends adjustment information to the terminal device, where the adjustment information is used to indicate a first time unit in which the random access signal is to be transmitted in the first period Adjusted to the fourth time unit, the first period is any one of the transmission periods of the random access signal indicated by the system information, the first period includes at least two time units, and the first time unit and the fourth time unit belong to the first period .

With reference to the second aspect, in some implementations of the second aspect, the random access signal has multiple candidate transmission formats, and each candidate transmission format in the multiple candidate transmission formats is specified in the configuration table of the random access signal. The proportion is determined according to the duration of sending the random access signal corresponding to each candidate transmission format.

With reference to the second aspect, in some implementations of the second aspect, the first control information is specifically used to indicate the index of one or more subframe numbers for transmitting the random access signal, and the index of the one or more subframe numbers is absolute The subframe number or the index of the relative subframe number; or, the first control information is specifically used to indicate the index of one or more time slot numbers for transmitting the random access signal, and the index of the one or more time slot numbers is an absolute time a slot number or an index relative to a slot number; or, the first control information is specifically used to indicate the index of one or more OFDM symbols for transmitting random access signals, and the index of the one or more OFDM symbols is an absolute OFDM symbol or a relative OFDM symbol. The index of the OFDM symbol.

With reference to the second aspect, in some implementations of the second aspect, the method further includes: the network device sends the channel occupation time COT information to the terminal device, where the COT information is used to indicate the information of the transmission time period preempted by the network device, The information of the transmission time period includes the start time of the transmission time period and/or the duration of the transmission time period.

With reference to the second aspect, in some implementations of the second aspect, the COT information includes one or more bits, and the network device sends the COT information to the terminal device, including: the network device sends the demodulation of the physical broadcast channel PBCH to the terminal device A reference signal DMRS or a tracking reference signal TRS, the DMRS or TRS of the PBCH carries COT information; or, the network device sends second control information to the terminal device, and the second control information carries the COT information.

In a third aspect, the present application provides a method for transmitting a random access signal, the method comprising: a terminal device receiving system information from a network device, where the system information is used to indicate a relative subframe number or relative time for transmitting a random access signal slot number; the terminal device determines the time domain resource position for transmitting the random access signal according to the system information.

In a fourth aspect, the present application provides a method for transmitting a random access signal, the method comprising: a terminal device receiving downlink control information from a network device, where the downlink control information is used to indicate a relative subframe number or Relative time slot number; the terminal device determines the time domain resource position for transmitting the random access signal according to the downlink control information.

In the method of the third aspect or the fourth aspect, the network device indicates the relative subframe number or relative time slot number for transmitting the random access signal to the terminal device through system information or downlink control information, which can improve the transmission of the random access signal. efficiency.

In a fifth aspect, the present application provides a communication apparatus, the communication apparatus having the function of implementing the terminal device in any possible implementation manner of the first aspect, the third aspect or the fourth aspect. These functions can be implemented by hardware, or can also be implemented by hardware executing corresponding software. The hardware or software includes one or more units corresponding to these functions.

In a sixth aspect, the present application provides a communication apparatus, the communication apparatus having the function of implementing the network device in any possible implementation manner of the second aspect, the third aspect or the fourth aspect. These functions can be implemented by hardware, or can also be implemented by hardware executing corresponding software. The hardware or software includes one or more units corresponding to these functions.

In a seventh aspect, the present application provides a terminal device including a transceiver, a processor and a memory. The processor is used to control the transceiver to send and receive signals, the memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory, so that the terminal device executes the method in the first aspect or any possible implementation manner of the first aspect.

In an eighth aspect, the present application provides a network device including a transceiver, a processor and a memory. The processor is used to control the transceiver to send and receive signals, the memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory, so that the network device executes the method in the second aspect or any possible implementation manner of the second aspect.

In a ninth aspect, the present application provides a computer-readable storage medium, where instructions are stored in the computer-readable storage medium, and when the instructions are executed on a computer, the computer can execute the first aspect or any possible implementation of the first aspect. method in method.

In a tenth aspect, the present application provides a computer-readable storage medium, where instructions are stored in the computer-readable storage medium, and when the instructions are executed on a computer, the computer can execute the second aspect or any possible implementation manner of the second aspect. method in .

In an eleventh aspect, the present application provides a chip, including a processor. The processor is configured to read and execute the computer program stored in the memory, so as to execute the method in the first aspect or any possible implementation manner of the first aspect. Optionally, the chip includes a memory connected to the processor. Further optionally, the chip further includes a communication interface, and the processor is connected to the communication interface. The communication interface is used for receiving data and/or information to be processed, the processor obtains the data and/or information from the communication interface, processes the data and/or information, and outputs the processing result through the communication interface. The communication interface may be an input-output interface.

In a twelfth aspect, the present application provides a chip including a processor. The processor is configured to read and execute the computer program stored in the memory to perform the method of the second aspect or any possible implementation of the second aspect. Optionally, the chip includes a memory connected to the processor. Further optionally, the chip further includes a communication interface, and the processor is connected to the communication interface. The communication interface is used for receiving data and/or information to be processed, the processor obtains the data and/or information from the communication interface, processes the data and/or information, and outputs the processing result through the communication interface. The communication interface may be an input-output interface.

Optionally, the above-mentioned memory and the memory may be physically independent units, or the memory may also be integrated with the processor.

In a thirteenth aspect, the present application provides a computer program product, the computer program product includes computer program code, when the computer program code is run on a computer, the computer is made to execute the above-mentioned first aspect and any one of possible implementations thereof. Methods.

In a fourteenth aspect, the present application provides a computer program product, the computer program product comprising computer program code, when the computer program code is run on a computer, the computer program code causes the computer to execute the second aspect and any possible implementation manner of the second aspect method in .

In the technical solution provided by the present application, the network device indicates to the terminal device one or more of the transmission period, transmission format or system frame number of the random access signal through the system information. Further, according to the result of channel monitoring, the network device indicates to the terminal device the subframe number or time slot number or start symbol for transmitting the random access signal through the first control information. In this way, the subframe number or time slot number or start symbol indicated by the network device to the terminal device is configured based on the result of channel monitoring, so that it can be applied to random access in an unlicensed spectrum scenario.

Description of drawings

FIG. 1 is a schematic diagram of a wireless communication system suitable for an embodiment of the present application.

FIG. 2 is a schematic flowchart of a method for transmitting a random access signal provided by the present application.

FIG. 3 is a schematic diagram of an apparatus for transmitting a random access signal provided by the present application.

FIG. 4 is a schematic diagram of an apparatus for transmitting a random access signal provided by the present application.

FIG. 5 is a schematic structural block diagram of a terminal device applicable to an embodiment of the present application.

FIG. 6 is a schematic structural block diagram of a network device suitable for this embodiment of the present application.

Detailed ways

The technical solutions in the present application will be described below with reference to the accompanying drawings.

Referring to FIG. 1 , FIG. 1 is a schematic diagram of a wireless communication system 100 suitable for an embodiment of the present application. As shown in FIG. 1 , the wireless communication system 100 may include at least one network device 101 , and the network device 101 performs wireless communication with one or more terminal devices (eg, the terminal device 102 and the terminal device 103 shown in FIG. 1 ).

The wireless communication system 100 involved in this application includes, but is not limited to, a global system of mobile communication (GSM) system, a code division multiple access (CDMA) system, and a wideband code division multiple access (wideband code division) system. multiple access, WCDMA) system, general packet radio service (general packet radio service, GPRS), long term evolution (long term evolution, LTE) system, LTE frequency division duplex (frequency division duplex, FDD) system, LTE time division duplex Three major applications of the time division duplex (TDD), the universal mobile telecommunication system (UMTS), the worldwide interoperability for microwave access (WiMAX) communication system, and the next generation mobile communication system (for example, 5G) Scenarios, namely enhanced mobile broadband (eMBB), ultra reliable low latency communication (URLLC) and enhanced massive machine type communication (eMTC) or new communication systems that will appear in the future Wait.

The terminal equipment involved in the embodiments of this application may be user equipment (UE), a terminal (terminal), an access terminal, a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, a remote terminal, or a mobile device , user terminal, terminal, wireless communication device, user agent or user equipment. The terminal device may also be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), a wireless communication function handheld devices, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminal devices in future 5G networks or in future evolved public landmobile networks (PLMN) Wait.

The network device involved in the embodiments of this application may be a global system of mobile communication (GSM) system or a base transceiver station (BTS) in code division multiple access (CDMA), or It is a base station (nodeB, NB) in a wideband code division multiple access (WCDMA) system, an evolved base station (evolved nodeB, eNB or eNodeB) in an LTE system, or a cloud wireless access A wireless controller in a cloud radio access network (CRAN) scenario. Alternatively, the network device may also be a relay station, an access point, an in-vehicle device, a wearable device, etc. of a future communication system (eg, 5G).

The technical solution provided in this application is suitable for random access of terminal equipment in the scenario of unlicensed spectrum. The random access process requires the network device to configure the time domain resource location for transmitting the random access signal for the terminal device. For example, the transmission period of the random access signal, the system frame number, the subframe number or the time slot number, etc. The present application provides several ways for the network device to indicate to the terminal device the location of the time domain resource for transmitting the random access signal, which will be described separately below.

way A

The network device indicates to the terminal device the time domain resource location for sending the random access signal through the system message and the downlink control information.

Referring to FIG. 2, FIG. 2 is a schematic flowchart of a method 200 for transmitting a random access signal provided by the present application.

210. The network device sends system information to the terminal device. Terminal devices receive system information from network devices.

Wherein, the system information is used to indicate one or more of the transmission period, transmission format and system frame number of the random access signal.

In this embodiment of the present application, the random access signal may also be referred to as RACH, RACH signal, preamble, or the like. The transmission occasion of the random access signal may be referred to as an access occasion (RACH Occasion, RO) or the like. It should be understood that the network device may configure one or more ROs for the terminal device within one system frame or within one subframe or within one RACH time slot.

Here, the transmission period, the transmission format and the system frame number are the same as those in the prior art. For example, the transmission period may be 10ms, 20ms, 40ms, 80ms, 160ms. Transmission formats can be classified into long-sequence transmission formats and short-sequence transmission formats. The long sequence of transport formats may include transport formats 0-3. The transmission format of the short sequence may include A1, A2, A3, B1, B4, A1/B1, A2/B2, A3/B3, C0, C2. The system frame number (system frame number, SFN) refers to the system frame number used to transmit the RACH in at least one system frame number included in the RACH transmission period, so it is also called the RACH system frame number. Here, the system frame number is a relative frame number of at least one system frame included in the RACH transmission period.

Optionally, the system information here may be remaining minimum system information (remaining minimum system information, RMSI), also called system information block 1 (system information block 1, SIB1).

220. The network device sends the first control information to the terminal device, and the terminal device receives the first control information from the network device.

The first control information is used to indicate a subframe number or a time slot number or a starting OFDM symbol for transmitting the random access signal.

Here, the subframe number of the random access signal refers to the subframe number in which the RACH is transmitted. In NR, 1 subframe is usually 1 ms.

The time slot number of the random access signal is also called a RACH time slot (RACH slot) sequence number. The time slot number of random access is the sequence number of the time slot contained in a system frame. When the subcarrier spacing is 15 kHz, one system frame includes 10 time slots, and at this time, the time slot number of random access can be any one of 0, 1, 2, . . . , 8, and 9. When the subcarrier spacing is 30 kHz, one system frame includes 20 time slots, and at this time, the time slot number of the random access can be any one of 0, 1, 2, . . . , 18, and 19. Similarly, when the subcarrier spacing is 60 kHz, one system frame includes 40 time slots, and at this time, the time slot number of random access can be any one of 0, 1, 2, . . . , 38, and 39.

In NR, for frequency bands below 6GHz, the number of RACH slots included in the 1ms duration granularity is called the number of RACH slots, and for frequency bands above 6GHz, the number of RACH slots included in the 0.25ms duration granularity is called the number of RACH slots . Each RACH slot may contain one or more RACH occasions (RACH occasions, RO).

The starting OFDM symbol of the random access signal is also called the RACH starting symbol. The RACH start symbol is one OFDM symbol among multiple OFDM symbols included in one RACH time slot. For a normal RACH time slot (equivalent to a time slot containing 14 symbols), the value of the RACH start symbol can be any one of 0, 1, . . . , 12, and 13. For a mini-slot (for example, a time slot containing 2, 4 or 7 symbols), taking a short time slot containing 7 symbols as an example, the value of the RACH start symbol can be 0, 1, . . . , 6 , any one of 7.

Optionally, the first control information in this embodiment of the present application may be downlink control information (downlink control information, DCI).

In the technical solution of the present application, the network device indicates one or more of the transmission period, transmission format or system frame number of the random access signal to the terminal device through the system information. Further, according to the result of channel monitoring, the network device indicates to the terminal device the subframe number or time slot number or start symbol for transmitting the random access signal through the first control information. In this way, the subframe number or time slot number or start symbol indicated by the network device to the terminal device is configured based on the result of channel monitoring, so it can be applied to random access in an unlicensed spectrum scenario.

Further, since the subframe number or time slot number or start symbol indicated by the network device to the terminal device is configured based on the result of the channel monitoring, the result of the channel access can be dynamically and adaptively tracked, thereby improving the unlicensed spectrum. Efficiency of random access in the scenario.

Optionally, the method 200 may further include steps 230 and 240 .

230. The terminal device determines, according to the received system information and the first control information, a time domain resource location for sending the random access signal.

Specifically, the time domain resource location is also the RO introduced above.

240. The terminal device sends a random access signal to the network device at the determined time domain resource location.

In step 230, the terminal device determines the time domain resource location for sending the random access signal according to the system information and the first control information, including determining the system frame number, subframe number or time slot number for sending the random access signal.

The following describes how the terminal device determines the system frame number for sending the random access signal.

It should be understood that in different transmission periods, the method for determining the system frame number for sending the random access signal is the same. Therefore, the following description takes any transmission period as an example. For the convenience of description, this arbitrary transmission period is hereinafter referred to as the first period.

Optionally, the first period includes one or more time units. The time unit may be a time unit such as a system frame, a subframe, a time slot, or an OFDM symbol, which is not limited here.

First, according to the system information and the first control information, the terminal may determine that the time unit for sending the random access signal within the first period configured by the network device is the first time unit. The first time unit may be any one of one or more time units included in the first period.

As mentioned above, due to the uncertainty of the LBT result in the unlicensed spectrum scenario, although the network device configures the time unit for transmitting the random access signal in the first cycle as the first time unit, it cannot guarantee that the Resources are preempted in the first time unit, or in other words, there is no guarantee that the LBT will succeed in the first time unit. Therefore, after determining the first time unit for transmitting the random access signal in the first period, the terminal device may also use the following method 1 and/or method 2 to adjust the time unit for transmitting the random access signal in the first period .

It should be understood that if the terminal device adopts Mode 1 and/or Mode 2, it means that the terminal device can only use Mode 1 to adjust the time unit for transmitting random access signals, or only use Mode 2 to adjust the time unit for transmitting random access signals. . Alternatively, the terminal device adjusts the time unit for transmitting the random access signal by combining the mode 1 and the mode 2.

way 1

The terminal device adjusts the time unit for sending the random access signal in the first period according to the channel monitoring result.

In mode 1, the terminal device may first determine the time unit for sending the random access signal within the first period configured by the network device according to the system information and/or the first control information. Further, the terminal device monitors the channel on one or more time units included in the first period. If the terminal device successfully monitors the channel on other time units located before the first time unit (hereinafter referred to as the second time unit), the terminal device determines the second time unit as the time unit for sending the random access signal in the first period . In other words, the terminal device adjusts the first time unit in which the random access signal is sent in the first period to the second time unit.

During the first period, the terminal device will send a random access signal to the network device on the second time unit. Wherein, the second time unit is also located in the first period, and the second time unit may be any time unit located before the first time unit in the first period.

For example, according to the system information and/or the first control information, the terminal device determines that the time unit for sending the random access signal in the first period configured by the network device is the system frame x. The terminal device listens to the channel in the system frame in the first period. If the terminal device successfully monitors the channel on the system frame y, and the system frame y is located before the system frame x in time, the terminal device will assume that the system frame in which the random access signal is sent in the first period is adjusted from the system frame x to the system frame y. Wherein, the system frame x and the system frame y are both system frames located in the first period. where y≥0, and y is an integer

For example, if the transmission period of the random access signal is 20ms, it is known that one system frame is 10ms. Then, one transmission period includes 2 system frames, which are represented as system frame 0 and system frame 1 respectively. Assuming that in a certain period, the system frame number configured by the network device to send the random access signal is 1, and the terminal device successfully monitors the channel on the system frame 0, then the terminal device will assume that the system that sends the random access signal in the period The frame number is adjusted to system frame 0.

Optionally, if the terminal device fails to monitor the channel in the first time unit of the first cycle, the terminal device will assume that the time unit for sending the random access signal in the first cycle is adjusted to the third time unit. The third time unit is a time unit located after the first time unit and adjacent to the first time unit, and the third time unit is also located in the first period.

For example, according to the system information and/or the first control information, the terminal device determines that the time unit for sending the random access signal in the first period configured by the network device is the system frame x. The terminal device listens to the channel on the system frame in the first period. If the terminal device fails to monitor the channel on the system frame x, the terminal device will assume that the system frame sending the random access signal in the first cycle is automatically extended from the system frame x to the next system frame x+1. Wherein, the system frame x and the system frame x+1 are both system frames located in the first period. where x≥0, and x is an integer.

For example, if the transmission period of the random access signal is 20ms, and it is known that one system frame is 10ms, then one transmission period includes 2 system frames, which are denoted as system frame 0 and system frame 1 respectively. Assuming that in a certain period, the system frame number configured by the network device to send the random access signal is 0, and the terminal device fails to monitor the channel on the system frame 0, then the terminal device will assume that the system that sends the random access signal within the period The frame number is automatically adjusted to system frame 1.

Further, if the terminal device also fails to monitor the channel on the system frame x+1, the terminal device will assume that the system frame x+1 that sends the random access signal in the first cycle is extended to the next system frame x+2 to And so on, until the monitoring channel is successful. At this time, the terminal device will assume that the system frame (for example, denoted as system frame x+n) in which the monitoring channel is successful is determined as the system frame in which the random access signal is sent in the first period. Wherein, the system frame x+n is located in the first period in time, and n is a positive integer.

It can be understood that, if the terminal device fails to monitor the channel in all time units in the first cycle, it will enter the next cycle. In the next cycle, the process of determining the time unit for sending the random access signal by the terminal device is the same as that in the above-mentioned first cycle, and will not be repeated here.

In the above example, after the terminal device fails to monitor the channel on the first time unit, the time unit for transmitting the random access signal is automatically extended to the next time unit. Optionally, as an implementation manner, after the terminal device fails to monitor the channel on the first time unit, the time unit for transmitting the random access signal may be extended to any time unit after the first time unit, instead of The extension is limited to a step size of 1, which is not limited in this application.

It can be understood that the above description takes the time unit as the system frame as an example. For the time unit as a subframe, a time slot, or an OFDM symbol, the time domain resource position of the above random access is dynamically adjusted according to the LBT result. method is still feasible and applicable. For example, assuming that in a certain period, the subframe number for sending random access signals in a system frame configured by the network device is 0, and the terminal equipment fails to monitor the channel on subframe 0, the terminal equipment will assume that the transmission The subframe number of the random access signal is automatically adjusted to subframe 1 or any other predefined subframe, etc. Or, the subframe number for sending the random access signal in a system frame configured by the network device is 1, and the terminal device successfully monitors the channel on subframe 0, then the terminal device will assume the subframe that sends the random access signal within this period. The number is automatically adjusted to subframe 0 or any other predefined subframe, etc.

way 2

The network device instructs the terminal device to adjust the time unit for sending the random access signal in the first cycle according to the channel monitoring result.

According to what is known above, the network device configures the terminal device through the system information and or the first control information to configure the time unit for sending the random access signal in the first cycle as the first time unit. After that, the network device listens to the channel. If the network device successfully monitors the channel in other time units in the first cycle, the network device sends adjustment information to the terminal device, where the adjustment information is used to instruct the terminal device to adjust the first time unit in which the random access signal is sent in the first cycle is a fourth time unit, and the fourth time unit is temporally located within the first period.

It should be noted that, the fourth time unit here is numbered only to distinguish it from the second time unit and the third time unit in the above-mentioned manner 1. Actually, the fourth time unit refers to the time unit in which the network device successfully monitors the channel. Therefore, the fourth time unit may be any other time unit in the first cycle except the first time unit. For example, the fourth time unit may be located before the first time unit, or may also be located after the first time unit, which is not limited in this application.

In mode 2, the adjustment information may be obtained by the network device through system information, RRC signaling, DCI signaling, phase tracking reference signals (TRS), channel state information reference signals (channel state information Reference Signal, CSI-RS), Any one or more of the demodulation reference signal or common control information of the physical broadcast channel is indicated to the terminal device, which is not limited in this application. When the adjustment information is indicated to the terminal device by TRS, CSI-RS or DMRS of PBCH, optionally, it is carried by initialization value or cyclic shift value or scrambling code of TRS sequence, CSI-RS sequence or DMRS sequence of PBCH The adjustment information.

It can be seen from the above that, in mode A, the network device indicates to the terminal device the time domain resource location for transmitting the random access signal through the system information and/or the first downlink control information.

way B

The network device indicates to the terminal device the time domain resource location for sending the random access signal in a semi-static manner through the system information.

In the semi-static manner, the time-domain resource location for transmitting the random access signal may be configured or indicated by the network device through system information. Before the network device performs the next configuration, the terminal device can periodically reuse the same time domain resource location.

Similarly, due to the uncertainty of the LBT result in the unlicensed spectrum scenario, after the terminal device determines the time unit for transmitting the random access signal in a transmission period according to the semi-static instruction of the network device, it also needs to determine the channel monitoring result according to the channel monitoring result. The time unit for transmitting the random access signal within the transmission period configured by the network device is adjusted. For the process of the terminal equipment adjusting the time unit used for transmitting the random access signal in one transmission period, please refer to the adjustment of the first time unit described in the above mode 1 and mode 2. The process is exactly the same, and will not be repeated here. .

Optionally, the system information described in way B may be RMSI. For example, the network device semi-statically indicates the system frame number of the random access signal to the terminal device through RMSI. For the terminal equipment, the system frame number is first determined semi-statically according to the RMSI. Subsequently, the system frame number is adjusted according to the channel monitoring result. Finally, the random access signal is transmitted to the network device on the system frame number on which the channel monitoring is successful.

way C

The network device indicates to the terminal device the time domain resource location for transmitting the random access signal through system information or downlink control information.

Specifically, the network device indicates to the terminal device at least one of a relative subframe number or a relative time slot number for transmitting the random access signal through the system information.

The relative subframe number means that the subframe number indicated by the system information is a relative subframe number within the transmission time period preempted by the network device. Or, the relative time slot number means that the time slot number indicated by the system information is a relative time slot number within the transmission time period preempted by the network device.

The above describes several ways in which the network device indicates to the terminal device the location of the time domain resource for transmitting the random access signal.

Further, in the unlicensed spectrum scenario of NR, the random access signal RACH can support multiple candidate transmission formats. These candidate transport formats may include A1, B1, C0, A1+B1, A2+B2, A2, B2, C2, and so on. The definition of each transmission format is the same as the definition of these transmission formats supported by the RACH in the licensed spectrum scenario.

Optionally, in an unlicensed spectrum scenario, in order to increase the RACH transmission opportunity, in the RACH configuration table, the proportion of different transmission formats in the configuration table can be related to the duration of sending RACH corresponding to each transmission format. related.

For example, a transmission format with a longer duration occupies a smaller proportion in the RACH configuration table, and a transmission format with a shorter duration occupies a larger proportion in the RACH configuration table. In other words, the transmission format with longer duration occupies fewer rows in the RACH configuration table, and the transmission format with shorter duration occupies more rows in the RACH configuration table.

Optionally, in the unlicensed spectrum scenario, the relationship between the proportions of the transmission formats in the RACH configuration table may be as shown in the following formula (1).

A1/B1/C1≥A1+B1≥A2/B2/C2≥A2+B2 (1)

Among them, A1/B1/C1 represents A1 or B1 or C1. A2/B2/C2 means A2 or B2 or C2. That is, in the formula (1), the character "/" represents the meaning of "or".

In formula (1), the proportion of any one of the transport formats A1, B1 or C1 in the RACH configuration table is greater than or equal to the transport formats A1+B1. The proportion of the transport format A1+B1 in the RACH configuration table is greater than or equal to any one of the transport formats A2, B2 or C2. The proportion of the transport format A2+B2 in the RACH configuration table is the smallest. For example, the proportion of any one of transport formats A1, B1 or C1 in the configuration table of RACH is 20%, the proportion of transport format A1+B1 in the configuration table of RACH is 15%, the proportion of transport formats A2, The proportion of either B2 or C2 in the configuration table of the RACH is 8%, and the proportion of the transport format A2+B2 in the configuration table of the RACH is 1%.

It should be noted that the configuration table of the RACH can be expressed as PRACH configuration index, which is abbreviated as PRACH ConfigIndex. PRACH ConfigIndex is a value ranging from 0 to m (for example, 0 to 255), where m is a positive integer greater than 0. Each value corresponds to a row in PRACH ConfigIndex, and each row corresponds to the random access signal such as the transmission format, system frame number, transmission period, and the specific time slot position or subframe position of the random access signal in the system frame. configuration parameters. In other words, PRACH ConfigIndex defines a pattern of random access resources that occurs periodically.

See Table 1, which is an example of a part of the configuration table of the RACH.

Table 1

Transmission format OFDM symbol T_-SEQ(T_S) T_-CP(T_S) T_-GP(T_S) scenes to be used A1 2 4096 288 0 small cell A2 4 8192 576 0 normal cell A3 6 12288 864 0 normal cell B1 2 4096 216 72 small cell B2 4 8192 360 216 normal cell B3 6 12288 504 360 normal cell B4 12 24576 936 792 normal cell C0 1 2048 1240 1096 normal cell C2 4 8192 2048 2916 normal cell

It should be understood that the random access signal consists of three parts: a cyclic prefix (cyclic prefix, CP), a preamble sequence length and a GP. Wherein, GP is the difference between the length of the preamble sequence and the PRACH time slot. In Table 2, the length of the CP is represented as T_CP, the length of the preamble sequence is represented as T_SEQ, and the length of the GP is represented as T_GP.

In Table 1, small cells generally refer to small base stations other than macro base stations, and may include micro cells (micro cells), nano cells (nano cells), pico cells (pico cells), femto cells, and the like. normal cell represents a normal macro base station. Alternatively, a small cell may refer to a cell with a relatively small coverage radius. A normal cell may refer to a cell with a medium or normal coverage radius.

Of course, the ratio given in formula (1) is only an example, and the embodiment of the present application does not limit the ratio of each transmission format in the RACH configuration table.

According to the above, in the unlicensed spectrum scenario, the time-frequency resource location configured by the network device for sending the random access signal will be affected by the uncertainty of the LBT result. Some of the time-frequency resource positions in the time-frequency resource positions cannot be guaranteed to be always transmitted. Therefore, in order to increase the random access opportunity of the terminal device and improve the efficiency of random access, in the above step 220, the content indicated by the first control information may specifically include the following possibilities.

Optionally, the first control information is used to indicate an index of one or more subframe numbers for transmitting the random access signal, and the index of the one or more subframe numbers is an index relative to the subframe number; or,

The first control information is used to indicate an index of one or more time slot numbers for transmitting the random access signal, and the index of the one or more time slot numbers is an index relative to the time slot number; or,

The first control information is used to indicate a starting OFDM symbol for transmitting a random access signal.

Wherein, the relative subframe number or relative time slot number or relative OFDM symbol means that the subframe number, time slot number or OFDM symbol indicated by the first control information is a relative subframe number in the transmission time period COT preempted by the network device Or relative slot number or relative OFDM symbol.

Specifically, if the network device preempts the transmission time period in the process of channel monitoring, it can indicate the relative subframe number or the relative time slot number by sending the first control information to the terminal device.

It should be understood that in NR, one system frame includes 10 subframes, and each subframe is 1 ms. For example, if the transmission time period preempted by the network device is 2ms, the transmission time period may include 2 subframes. If the two subframes are numbered 0 and 1 respectively, the relative subframe numbers in the transmission time period may be Subframe number 0 and subframe number 1. That is to say, if the network device indicates the relative subframe 0 in the transmission time period to the terminal device, it means that the network device indicates a more certain time domain position in the transmission time period, and can even be specific to the 2ms The first 1ms or the second 1ms of the transmission time period. For another example, if the transmission time period preempted by the network device is 2ms, the 2ms may include 4 time slots, and the relative time slot numbers in the transmission time period may be time slot number 0, time slot number 1, time slot number 2 and slot number 3. If the network device indicates the relative time slot number 2 to the terminal device, the terminal device may determine the time domain position for transmitting the random access signal as the third time slot number of the 2ms.

It should be noted that the network device indicates the time-frequency resource location for transmitting the random access signal by using a relative subframe number or a relative time slot number, which can increase the random access efficiency of the terminal device. The reason is that, compared with the network equipment indicating an absolute subframe number or absolute time slot number, the network equipment cannot predict the uncertainty of channel access on the unlicensed spectrum, that is, the randomness of the LBT results. In which subframe the LBT succeeds (ie, the channel access opportunity is obtained), so that the random access signal cannot actually be sent on the absolute subframe or absolute slot position blindly configured by the network device. The relative subframe number or relative time slot number configured in this application is the relative time in the transmission time period successfully preempted by the LBT. Therefore, the time domain resource position for sending the random access signal can be determined, thereby improving the random access signal. the transmission efficiency of the incoming signal.

As another implementation manner in an unlicensed spectrum scenario, the first control information may also be used to indicate an index of one or more subframe numbers for transmitting random access signals, and the index of the one or more subframe numbers is an absolute subframe index of the number. Alternatively, the first control information may also be used to indicate an index of one or more time slot numbers for transmitting the random access signal, where the index of the one or more time slot numbers is an index of an absolute time slot number. Alternatively, the first control information may also be used to indicate an index of one or more OFDM symbols for transmitting the random access signal, and the index of the one or more OFDM symbols is an index of absolute OFDM. Alternatively, the first control information may also be used to indicate an index of one or more system frame numbers in which the random access signal is transmitted.

When the network device indicates the relative subframe number or the relative time slot number or the relative OFDM symbol to the terminal device, the network device further needs to send channel occupancy time (COT) information to the terminal device.

The COT information is used to indicate the information of the signal transmission time period preempted by the network device, and the information of the transmission time period includes the start time of the transmission time period and/or the duration of the transmission time period.

If the first control information indicates a relative subframe number, eg, a relative subframe number in the COT, the terminal device determines the absolute subframe number for transmitting the random access signal according to the received COT information and the relative subframe number. Alternatively, if the first control information indicates a relative time slot number, eg, a relative time slot number in the COT, the terminal device determines the absolute time slot number for transmitting the random access signal according to the received COT information and the relative time slot number. Alternatively, if the first control information indicates a relative OFDM symbol, eg, a relative OFDM symbol within the COT, the terminal device determines an absolute OFDM symbol for transmitting the random access signal according to the received COT information and the relative OFDM symbol.

Optionally, the relative subframe number may be a relative subframe number in the COT, or the relative time slot number may be a relative time slot number in the COT, it is understood that the relative subframe number or the relative time slot The number may also be a relative subframe number or a relative time slot number in other predefined time periods, etc., which is not limited here.

Optionally, when the network device indicates the COT information to the terminal device, the terminal device may also implicitly determine the system frame number for transmitting the random access signal according to the COT information indicated by the network device. When the COT information is indicated to the terminal device through the first control information, it means that the determination of the system frame number for transmitting the random access signal is implicitly determined by the first control information, so it is dynamic.

In this embodiment of the present application, when the network device indicates the relative subframe number or relative time slot number to the terminal device through the first control information, the network device indicates the location of the time domain resource for transmitting the random access signal according to the field in the first control information (the following Whether it is recorded as an indication field) is always present, the network device can have the following two designs.

(1) The indication field in the first control information always exists.

That is to say, the network device specially configures an indication field in the first control information, regardless of whether the network device preempts the COT, or whether the relative subframe number or relative time slot number is indicated to the terminal device, the indication field exists. .

It can be understood that, if the network device indicates a relative subframe number, a relative slot number, or a relative OFDM symbol, one or several bits are used for the indication in the indication field. If the network device indicates an absolute subframe number or an absolute slot number or an absolute OFDM symbol, the indication field may be set to invalid.

(2) Whether the indication field is set in the first control information depends on whether the network device preempts the COT.

It is easy to understand that if the network device preempts the COT, the network device indicates the relative subframe number or the relative time slot number or the relative OFDM symbol to the terminal device. At this time, the network device sets an indication field in the first control information. If the network device does not preempt the COT, or the network device indicates the absolute subframe number, absolute time slot number or absolute OFDM symbol to the terminal device, the network device does not set the indication field in the first control information.

This embodiment of the present application does not limit which design of (1) and (2) above is specifically adopted by the network device.

Specifically, the COT information includes one or several bits. According to the number of bits included in the COT information, the network device can choose different ways to send the COT information to the terminal device.

Optionally, as an implementation manner, if the number of bits of the COT information is relatively small, the network device may carry the COT information through some reference signals. For example, the network device sends PBCH DMRS or TRS to the terminal device, and the sequence initialization value of the PBCH DMRS or TRS carries COT information. Equivalently, the sequence cyclic shift value of the PBCH DMRS or TRS carries COT information. Alternatively, the scrambling sequence of the PBCH DMRS or TRS carries COT information.

Taking the COT information carried by the TRS as an example, a system frame may be divided into multiple segments (segments) according to the supported COT lengths, and different TRS sequences carry the multiple segment information. Assuming that the length of COT is 2ms, the 10ms included in a system frame can be divided into 5 segments, which are segment 1 (segment 1, the same below): 0～1ms, segment 2: 2～3ms, segment 3: 4 ～5ms, segment 4: 6～7ms, segment 5: 8～9ms. The transmission time segment COT preempted when the LBT succeeds may be any one of the five interval segments.

It should be understood that segment 1 corresponds to the interval of 2ms corresponding to 0ms-1ms of the system frame, segment 2 corresponds to the interval of 2ms corresponding to 2ms-3ms of the system frame, and segment 3 corresponds to the interval of 2ms corresponding to 4ms-5ms of the system frame interval segment. By analogy, no further description will be given. Different initialization values or cyclic shift values of different TRS sequences can be obtained based on different segment information, thereby generating different TRS sequences.

Referring to Table 2, Table 2 is an example of the relative subframe or slot number of the RMSI configuration random access signal within the COT.

Table 2

In the above table, the subframe numbers 0', 1', 2' represent the relative subframe numbers of the random access signal in the COT after the LBT succeeds. Taking the COT length of 3ms as an example, 0' represents the first subframe in the COT after the LBT succeeds, and 1' represents the second subframe in the COT after the LBT succeeds. , 2' represents the third subframe in the COT after the random access signal is successfully LBT. n _SFN represents the absolute system frame number of the random access signal transmission, x is the transmission period of the random access signal/10, and y is the relative system frame number of the random access signal in one transmission period. It should be understood that the above table is only an exemplary configuration, and the configuration of the actual random access signal may be other configurations different from the above table, which is not specifically limited here.

Furthermore, in order to increase the chances of the terminal device sending the RACH, the network device should ensure that each row in the RACH configuration table at least satisfies the chances of M times of RACH transmission.

It is embodied in Table 2, that is, the product in the last two columns in Table 2 (ie, the number of PRACH slots in one subframe and the number of ROs in one slot) should be greater than or equal to M. For example, the product of the last two columns of each row in Table 2 is greater than or equal to 12, that is, the configuration corresponding to each row can guarantee at least 12 RACH transmission opportunities.

Optionally, the value of M may be predefined, may be configured by a network device, or may be implicitly determined. For example, the network device will be implicitly associated with different values of M according to the LBT type, which is not limited in this application.

Optionally, M=2, 4, 8, 12 or 24.

Optionally, as an implementation manner, if the number of bits of the COT information is relatively large, the network device sends second control information to the terminal device, and the second control information carries the COT information.

Wherein, the second control information may be public control information. Here, the meaning of common control information is control information common to all terminal devices in the cell. It should be understood that the second control information may also be control information of a terminal device group, where the control information of a terminal device group refers to common control information of a group of terminal devices. Optionally, the second control information is carried by a downlink control channel.

The method 200 for transmitting a random access signal provided by the present application and various possible implementation manners thereof have been described in detail above with reference to FIG. 1 and FIG. 2 . The apparatus, terminal equipment, and network equipment for transmitting random access signals provided by the present application are described below.

Referring to FIG. 3 , FIG. 3 is a schematic diagram of an apparatus 500 for transmitting a random access signal provided by the present application. As shown in FIG. 3 , the apparatus 500 includes a communication unit 510 .

a communication unit 510, configured to receive system information from a network device, where the system information is used to indicate one or more of the transmission period, transmission format and system frame number of the random access signal;

The communication unit 510 is further configured to receive first control information from the network device, where the first control information is used to indicate a subframe number or time slot number or a starting OFDM symbol for transmitting the random access signal.

Optionally, the communication unit 510 may include a receiving unit and a sending unit, and have the functions of receiving and sending at the same time.

Optionally, the apparatus 500 completely corresponds to the terminal equipment in the method embodiments, and corresponding units of the apparatus 500 are configured to execute the corresponding steps performed by the terminal equipment in the foregoing method 200 and its various embodiments. For example, the communication unit 510 in the apparatus 500 performs the steps of receiving and/or sending in the method embodiment, for example, performing the step 210 of receiving system information from the network device in FIG. 2, or performing the step of receiving the first control information from the network device 220. Alternatively, a step of receiving the second control information or COT information from the network device, etc. is performed.

Optionally, the apparatus 500 may also be a chip or an integrated circuit installed in a terminal device.

Optionally, when the apparatus 500 is a terminal device, the communication unit 510 may be a transceiver. A transceiver may include a transmitter and a receiver, which together perform the functions of receiving and transmitting. Alternatively, when the apparatus 500 is a chip or an integrated circuit installed in a terminal device, the communication unit 510 may also be an input/output interface.

Further, the apparatus 500 further includes a processing unit 520 . Wherein, the processing unit 520 is configured to execute the steps in the apparatus 500 that are executed inside the apparatus 500 except for receiving and sending. The processing unit 520 may be a processor.

For example, the processing unit 510 is used to perform step 220 . That is, according to the system information and the first control information received by the communication unit 510, the time-frequency resource position for transmitting the random access signal is determined.

Optionally, the processing unit 520 is configured to determine, according to the system information and the first control information, a first time unit for sending the random access signal in the first period, where the first period is the transmission period of the random access signal indicated by the system information. Any one of the first cycle includes at least two time units; the communication unit 510 is further configured to monitor the channel on the at least two time units included in the first cycle; the processing unit 520 is further configured to determine that the communication unit 510 is at the first time When the channel is successfully monitored on the second time unit before the unit, the second time unit is determined as the time unit for sending the random access signal in the first period.

Optionally, the processing unit 520 is configured to determine, according to the system information and the first control information, a first time unit for sending the random access signal in the first period, where the first period is the transmission period of the random access signal indicated by the system information. Any one of the first cycle includes at least two time units; the communication unit 510 is further configured to monitor the channel on the at least two time units included in the first cycle; the processing unit 520 is further configured to determine that the communication unit 510 is at the first time When the monitoring of the channel on the unit fails, the third time unit located after the first time unit and adjacent to the first time unit is determined as the time unit for sending the random access signal in the first period.

Optionally, the communication unit 510 is further configured to receive adjustment information from the network device. For the description of the adjustment information, reference may be made to the method embodiments, which will not be repeated here.

Optionally, the communication unit 520 is further configured to receive the channel occupation time COT information from the network device, where the COT information is used to indicate the information of the transmission time period preempted by the network device, and the information of the transmission time period includes the start time of the transmission time period. and/or the duration of the transmission period.

Optionally, when the first control information is used to indicate the index of the relative subframe number for transmitting the random access signal, the processing unit 520 is further configured to determine the index of the relative subframe number for transmitting the random access signal according to the COT information and the index of the relative subframe number. The absolute subframe number; or, when the first control information is used to indicate the index of the relative time slot number for transmitting the random access signal, the processing unit 520 is further configured to determine the transmission random access signal according to the COT information and the index of the relative time slot number. the absolute slot number of the incoming signal; or,

When the first control information is used to indicate the index of the relative OFDM symbol for transmitting the random access signal, the processing unit 520 is further configured to determine the relative index of the OFDM symbol for transmitting the random access signal according to the COT information and the index of the relative OFDM symbol. Absolute OFDM symbols.

For example, the relative subframe number is the relative subframe number in the COT, the relative slot number is the relative slot number in the COT, or the relative OFDM symbol is the relative OFDM symbol in the COT, and the like.

Optionally, the communication unit 610 is further configured to receive a demodulation reference signal DMRS or a tracking reference signal TRS of a physical broadcast channel PBCH from a network device, where the DMRS or TRS of the PBCH carries the COT information; or,

The communication unit 610 is further configured to receive second control information from the network device, where the COT information is carried in the second control information.

Referring to FIG. 4, FIG. 4 is a schematic diagram of an apparatus 600 for transmitting a random access signal provided by the present application. As shown in FIG. 4 , the apparatus 600 includes a communication unit 610 .

a communication unit 610, configured to send system information to the terminal device, where the system information is used to indicate one or more of the transmission period, transmission format and system frame number of the random access signal;

The communication unit 610 is further configured to send first control information to the terminal device, where the first control information is used to indicate a subframe number or time slot number or a starting OFDM symbol for transmitting the random access signal.

The apparatus 600 completely corresponds to the network equipment in the method embodiments, and corresponding units of the apparatus 600 are configured to execute the corresponding steps performed by the network equipment in the foregoing method 200 and its various embodiments. For example, the communication unit 610 in the apparatus 600 is configured to perform the steps of sending and/or receiving in the method embodiment. For example, the communication unit 610 performs step 210 of sending system information to the terminal device in FIG. 2 , or performs step 220 of sending the first control information to the terminal device. For another example, the communication unit 610 further performs the step of sending the COT information or the second control information to the terminal device.

Optionally, the apparatus 600 may also be a chip or an integrated circuit installed in a network device.

Optionally, when the apparatus 600 is a network device, the communication unit 610 may be a transceiver. The transceiver includes a transmitter and a receiver, which together realize the functions of receiving and transmitting. Alternatively, when the apparatus 600 is a chip or an integrated circuit installed in a network device, the communication unit 610 may also be an input/output interface.

Further, the apparatus 600 further includes a processing unit 620 . Wherein, the processing unit 620 is configured to execute the steps in the device 600 that are executed inside the device 600 except for receiving and sending. For example, the processing unit 620 is configured to generate system information, first control information or second control information, and the like. Alternatively, the processing unit 620 may be a processor.

Optionally, the communication unit 610 is further configured to send adjustment information to the terminal device. For the description of the adjustment information, reference may be made to the method embodiments, which will not be repeated here.

Optionally, the communication unit 610 is further configured to send the channel occupation time COT information to the terminal device, where the COT information is used to indicate the information of the transmission time period preempted by the network device, and the information of the transmission time period includes the The start time of the transmission time period and/or the duration of the transmission time period.

Optionally, the communication unit 610 is further configured to send a demodulation reference signal DMRS or a tracking reference signal TRS of the physical broadcast channel PBCH to the terminal device, where the DMRS or TRS of the PBCH carries the COT information; or,

Send second control information to the terminal device, where the COT information is carried in the second control information.

Referring to FIG. 5, FIG. 5 is a schematic structural block diagram of a terminal device 700 applicable to this embodiment of the present application. As shown in FIG. 5 , the terminal device 700 includes: one or more processors 701 , one or more memories 702 , and one or more transceivers 703 . The processor 701 is used to control the transceiver 703 to send and receive signals, the memory 702 is used to store a computer program, and the processor 701 is used to call and run the computer program from the memory 702 to execute the method 200 for sending and receiving feedback information proposed in this application and corresponding processes and/or operations performed by the terminal device in each embodiment. It will not be repeated here.

Referring to FIG. 6, FIG. 6 is a schematic structural block diagram of a network device 3000 applicable to this embodiment of the present application. As shown in FIG. 6 , the network device 3000 may be applied to the wireless communication system shown in FIG. 1 above to perform the functions of the network device in the method embodiment of the present application. The network device 3000 may be, for example, a base station.

The network device 3000 may include one or more radio frequency units, such as a remote radio unit (remote radio unit, RRU) 3100 and one or more baseband units (baseband unit, BBU). The baseband unit may also be referred to as a digital unit (DU) 3200 . The RRU 3100 may be called a transceiver unit, which corresponds to the communication unit 610 in FIG. 4 . Optionally, the transceiver unit 3100 may also be referred to as a transceiver, a transceiver circuit, or a transceiver, etc., which may include at least one antenna 3101 and a radio frequency unit 3102 . Optionally, the transceiver unit 3100 may include a receiving unit and a sending unit, the receiving unit may correspond to a receiver (or called a receiver, a receiving circuit), and the sending unit may correspond to a transmitter (or called a transmitter, a sending circuit). The RRU 3100 part is mainly used for receiving and transmitting radio frequency signals and converting radio frequency signals to baseband signals, for example, for sending system information, first control information, adjustment information, COT information and second control information to terminal equipment. The part of the BBU 3200 is mainly used to perform baseband processing, control the base station, and so on. The RRU 3100 and the BBU 3200 may be physically set together or physically separated, that is, a distributed base station.

The BBU 3200 is the control center of the network device 3000, which may also be called a processing unit, and is mainly used to complete baseband processing functions, such as channel coding, multiplexing, modulation, and spectrum spreading. For example, the BBU (processing unit) may be used to control the base station to perform the operation procedures performed by the network device in the above method embodiments, for example, to generate system information, first control information, adjustment information, COT information or second control information.

In an example, the BBU 3200 may be composed of one or more boards, and the multiple boards may jointly support a radio access network (eg, LTE network) of a single access standard, or may support different access standards respectively. the wireless access network (eg, LTE network, 5G network or other network). The BBU 3200 also includes a memory 3201 and a processor 3202. The memory 3201 is used to store necessary instructions and data. The processor 3202 is configured to control the network device 3000 to perform necessary actions, for example, to control the network device 3000 to perform the operation procedures performed by the network device in the foregoing method embodiments. The memory 3201 and processor 3202 may serve one or more single boards. That is to say, the memory and processor can be provided separately on each single board. It can also be that multiple boards share the same memory and processor. In addition, necessary circuits may also be provided on each single board.

It should be understood that the network device 3000 shown in FIG. 6 can implement the functions of the network device involved in the method embodiments. The operations and/or functions of each unit in the network device 3000 are respectively to implement the corresponding processes executed by the network device in the method embodiments of the present application. To avoid repetition, the detailed description is appropriately omitted here.

The above-mentioned BBU 3200 may be used to perform the actions implemented inside the network device described in the foregoing method embodiments, for example, to generate association relationship indication information. On the other hand, the RRU 3100 may be configured to perform the actions that the network device sends to or receives from the terminal device described in the foregoing method embodiments. For example, system information, first control information, and the like are sent to the terminal device. For details, please refer to the descriptions in the foregoing method embodiments, which will not be repeated here.

In addition, the present application also provides a computer-readable storage medium, where computer instructions are stored in the computer-readable storage medium, and when the computer instructions are executed on the computer, the computer is made to execute the random access signal transmission of the embodiments of the present application. The method 200 and corresponding operations and/or processes performed by the terminal device in the various embodiments thereof.

The present application also provides a computer program product, the computer program product includes computer program code, when the computer program code is run on a computer, the computer program code enables the computer to execute the method 200 for transmitting a random access signal according to the embodiment of the present application and its various implementations Corresponding operations and/or processes performed by the terminal device in the example.

The present application also provides a chip including a processor. The processor is configured to read and run the computer program stored in the memory to execute the method 200 for transmitting a random access signal provided by this application and the corresponding operations and/or processes performed by the terminal device in various embodiments thereof. Optionally, the chip further includes a memory connected to the processor, and the processor is used for reading and executing the computer program in the memory. Further optionally, the chip further includes a communication interface, and the processor is connected to the communication interface. The communication interface is used to receive data and/or information to be processed, and the processor acquires the data and/or information from the communication interface and processes the data and/or information. The communication interface may be an input-output interface.

In addition, the present application provides a computer-readable storage medium, where computer instructions are stored in the computer-readable storage medium, and when the computer instructions are executed on a computer, the computer is made to execute the method for transmitting a random access signal according to the embodiment of the present application. 200 and corresponding operations and/or processes performed by the network device in various embodiments thereof.

The present application also provides a computer program product, the computer program product includes computer program code, when the computer program code is run on a computer, the computer program code enables the computer to execute the method 200 for transmitting a random access signal according to the embodiment of the present application and its various implementations Corresponding operations and/or processes performed by the network device in the example.

The present application also provides a chip including a processor. The processor is configured to call and run the computer program stored in the memory to execute the method 200 for sending and receiving feedback information in the embodiments of the present application and the corresponding operations and/or processes performed by the network device in each embodiment thereof. Optionally, the chip further includes a memory connected to the processor, and the processor is used for reading and executing the computer program in the memory. Further optionally, the chip further includes a communication interface, and the processor is connected to the communication interface. The communication interface is used to receive data and/or information to be processed, and the processor acquires the data and/or information from the communication interface and processes the data and/or information. The communication interface may be an input-output interface.

In the above embodiments, the processor may be a central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more of them for controlling the technology of the present application Program execution of integrated circuits, etc. For example, the processor may be a digital signal processor device, a microprocessor device, an analog-to-digital converter, a digital-to-analog converter, or the like. The processor can distribute the control and signal processing functions of the terminal equipment or the network equipment among these devices according to their respective functions. In addition, the processor may have the functionality to operate one or more software programs, which may be stored in the memory. The functions of the processor may be implemented by hardware, or may be implemented by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above functions.

The memory can be read-only memory (ROM), other types of static storage devices that can store static information and instructions, random access memory (RAM), or other types of storage devices that can store information and instructions A dynamic storage device can also be an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM), or other optical disk storage, optical disk storage (including compact disc, laser disc, optical disc, digital versatile disc, blu-ray disc, etc.), magnetic disk storage medium, or other magnetic storage device, or can be used to carry or store the desired program code in the form of instructions or data structures and can be accessed by Any other medium accessed by the computer, etc.

Optionally, the memory and the memory involved in the foregoing embodiments may be physically independent units, or the memory may also be integrated with the processor.

Those of ordinary skill in the art can realize that the units and algorithm steps described in the embodiments disclosed herein can be implemented by a combination of electronic hardware, 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 this application.

In the several embodiments provided in this application, the disclosed systems, devices and methods may be implemented in other manners. For example, the apparatus embodiments described above are only illustrative, for example, the division of units is only a logical function division, and there may be other division manners in actual implementation. For example, multiple units or components may be combined or may be integrated into another system, or some features may 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 not be physically separated, and components displayed as units may not be physical units, that is, they 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 technical solution of the present application.

In addition, each functional unit in each embodiment of the present application 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 application 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 application. The aforementioned storage medium includes: U disk, removable hard disk, read-only memory (ROM), 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 application. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be covered by the protection scope of the present application. The scope of protection of this application shall be.

Claims (34)

1. A method for transmitting a random access signal, comprising:

the terminal equipment receives system information from the network equipment, wherein the system information is used for indicating one or more of a transmission period, a transmission format and a system frame number of a random access signal;

the terminal equipment receives first control information from the network equipment, wherein the first control information is used for indicating a subframe number or a time slot number or a starting Orthogonal Frequency Division Multiplexing (OFDM) symbol for transmitting the random access signal;

the terminal device determines a first time unit for sending the random access signal in a first period according to the system information and the first control information, wherein the first period is any one of transmission periods of the random access signal indicated by the system information, and the first period comprises at least two time units;

and the terminal equipment adjusts the time unit for sending the random access signal in the first period according to the monitoring result.

2. The method of claim 1, further comprising:

the terminal equipment monitors channels on at least two time units included in the first period;

and when the channel monitoring is successful in a second time unit located before the first time unit in the first period, the terminal equipment determines the second time unit as the time unit for sending the random access signal in the first period.

3. The method of claim 1, further comprising:

the terminal equipment monitors channels on at least two time units included in the first period;

when monitoring a channel on the first time unit in the first period fails, the terminal device determines a third time unit, which is located after the first time unit and adjacent to the first time unit, as the time unit for sending the random access signal in the first period.

4. A method according to claim 2 or 3, characterized in that the method further comprises:

and the terminal equipment receives adjustment information from the network equipment, wherein the adjustment information is used for indicating that a first time unit for transmitting the random access signal in the first period is adjusted to be a fourth time unit, and the fourth time unit is positioned in the first period.

5. The method of claim 4, wherein the random access signal has a plurality of candidate transmission formats, and wherein a ratio of each candidate transmission format in the configuration table of the random access signal is determined according to a duration for transmitting the random access signal corresponding to each candidate transmission format.

6. The method according to claim 1, wherein the first control information is specifically configured to indicate:

transmitting an index of one or more subframe numbers of the random access signal, wherein the index of one or more subframe numbers is an absolute subframe number or a relative subframe number; or,

transmitting an index of one or more time slot numbers of the random access signal, wherein the index of one or more time slot numbers is an index of an absolute time slot number or a relative time slot number; or,

transmitting an index of one or more OFDM symbols of the random access signal, the index of the one or more OFDM symbols being an absolute OFDM symbol or an index of a relative OFDM symbol.

7. The method of claim 6, further comprising:

the terminal device receives channel occupation time COT information from the network device, wherein the COT information is used for indicating the transmission time period occupied by the network device, and the transmission time period information comprises the starting time of the transmission time period and/or the duration of the transmission time period.

8. The method of claim 7, further comprising:

when the first control information is used for indicating an index of a relative subframe number for transmitting the random access signal, the terminal equipment determines an absolute subframe number for transmitting the random access signal according to the COT information and the index of the relative subframe number; or,

when the first control information is used for indicating an index of a relative time slot number for transmitting the random access signal, the terminal equipment determines an absolute time slot number for transmitting the random access signal according to the COT information and the index of the relative time slot number; or,

when the first control information is used for indicating an index of a relative OFDM symbol for transmitting the random access signal, the terminal equipment determines an absolute OFDM symbol for transmitting the random access signal according to the COT information and the index of the relative OFDM symbol.

9. The method of claim 7 or 8, wherein the COT information comprises one or more bits, and wherein the receiving the COT information from the network device by the terminal device comprises:

the terminal equipment receives a demodulation reference signal (DMRS) or a Tracking Reference Signal (TRS) of a Physical Broadcast Channel (PBCH) from the network equipment, wherein the DMRS or TRS of the PBCH carries the COT information; or,

and the terminal equipment receives second control information from the network equipment, wherein the second control information carries the COT information.

10. A method for transmitting a random access signal, comprising:

the network equipment sends system information to the terminal equipment, wherein the system information is used for indicating one or more of a transmission period, a transmission format and a system frame number of a random access signal;

the network equipment sends first control information to the terminal equipment, wherein the first control information is used for indicating a subframe number or a time slot number or an initial Orthogonal Frequency Division Multiplexing (OFDM) symbol for transmitting the random access signal;

the network device sends adjustment information to the terminal device according to the monitoring result, wherein the adjustment information is used for indicating to adjust the time unit for sending the random access signal in a first period, the first period is any one of transmission periods of the random access signal indicated by the system information, and the first period comprises at least two time units.

11. The method of claim 10, wherein the adjustment information is used to indicate that a first time unit for transmitting the random access signal in a first period is adjusted to a fourth time unit, and the first time unit and the fourth time unit belong to the first period.

12. The method according to claim 10 or 11, wherein the random access signal has a plurality of candidate transmission formats, and a ratio of each candidate transmission format in the configuration table of the random access signal is determined according to a duration for transmitting the random access signal corresponding to each candidate transmission format.

13. The method according to claim 10, wherein the first control information is specifically configured to indicate:

transmitting an index of one or more subframe numbers of the random access signal, wherein the index of one or more subframe numbers is an absolute subframe number or a relative subframe number; or,

transmitting an index of one or more time slot numbers of the random access signal, wherein the index of one or more time slot numbers is an index of an absolute time slot number or a relative time slot number; or,

transmitting an index of one or more OFDM symbols of the random access signal, the index of one or more OFDM symbols being an index of an absolute OFDM symbol or a relative OFDM symbol.

14. The method of claim 13, further comprising:

the network equipment sends COT information of channel occupation time to the terminal equipment, wherein the COT information is used for indicating the information of the transmission time period occupied by the network equipment, and the information of the transmission time period comprises the starting time of the transmission time period and/or the duration of the transmission time period.

15. The method of claim 14, wherein the COT information comprises one or more bits, and wherein the network device sends the COT information to the terminal device, comprising:

the network equipment sends a demodulation reference signal (DMRS) or a Tracking Reference Signal (TRS) of a Physical Broadcast Channel (PBCH) to the terminal equipment, wherein the DMRS or TRS of the PBCH carries the COT information; or,

and the network equipment sends second control information to the terminal equipment, wherein the second control information carries the COT information.

16. An apparatus for transmitting a random access signal, comprising:

a communication unit configured to receive system information from a network device, the system information indicating one or more of a transmission period, a transmission format, and a system frame number of a random access signal;

the communication unit is further configured to receive first control information from the network device, where the first control information is used to indicate a subframe number or a slot number or a starting Orthogonal Frequency Division Multiplexing (OFDM) symbol for transmitting the random access signal;

a processing unit, configured to determine, according to the system information and the first control information, a first time unit for sending the random access signal in a first period, where the first period is any one of transmission periods of the random access signal indicated by the system information, and the first period includes at least two time units;

the processing unit is further configured to adjust a time unit for sending the random access signal in the first period according to the monitoring result.

17. The apparatus of claim 16, further comprising:

the communication unit is further configured to listen to a channel for at least two time units included in the first period;

the processing unit is further configured to, when it is determined that the communication unit successfully listens to the channel in a second time unit located between the first time units in the first period, determine the second time unit as the time unit for transmitting the random access signal in the first period.

18. The apparatus of claim 16, further comprising:

the communication unit is further configured to listen to a channel for at least two time units included in the first period;

the processing unit is further configured to, when it is determined that the communication unit fails to listen to the channel in the first time unit, determine a third time unit, which is located after the first time unit and is adjacent to the first time unit, as the time unit that transmits the random access signal in the first period.

19. The apparatus of claim 17 or 18, further comprising:

the communication unit is further configured to receive, from the network device, adjustment information, where the adjustment information is used to instruct to adjust a first time unit for transmitting the random access signal in the first period to a fourth time unit, and the fourth time unit is located in the first period.

20. The apparatus of claim 19, wherein the random access signal has a plurality of candidate transmission formats, and wherein a proportion of each candidate transmission format in the configuration table of the random access signal is determined according to a duration for transmitting the random access signal corresponding to each candidate transmission format.

21. The apparatus of claim 16, wherein the first control information is specifically configured to indicate:

transmitting an index of one or more subframe numbers of the random access signal, wherein the index of one or more subframe numbers is an absolute subframe number or a relative subframe number; or,

transmitting an index of one or more time slot numbers of the random access signal, wherein the index of one or more time slot numbers is an index of an absolute time slot number or a relative time slot number; or,

transmitting an index of one or more OFDM symbols of the random access signal, the index of the one or more OFDM symbols being an absolute OFDM symbol or an index of a relative OFDM symbol.

22. The apparatus of claim 17, wherein the communication unit is further configured to:

receiving Channel Occupation Time (COT) information from the network equipment, wherein the COT information is used for indicating the information of the transmission time period occupied by the network equipment, and the information of the transmission time period comprises the starting time of the transmission time period and/or the duration of the transmission time period.

23. The apparatus of claim 22, wherein the processing unit is further configured to:

when the first control information is used for indicating an index of a relative subframe number for transmitting the random access signal, determining an absolute subframe number for transmitting the random access signal according to the COT information and the index of the relative subframe number; or,

when the first control information is used for indicating an index of a relative time slot number for transmitting the random access signal, determining an absolute time slot number for transmitting the random access signal according to the COT information and the index of the relative time slot number; or,

and when the first control information is used for indicating the index of the relative OFDM symbol for transmitting the random access signal, determining the absolute OFDM symbol for transmitting the random access signal according to the COT information and the index of the relative OFDM symbol.

24. The apparatus according to claim 22 or 23, wherein the COT information comprises one or more bits, and wherein the communication unit is specifically configured to:

receiving a demodulation reference signal (DMRS) or a Tracking Reference Signal (TRS) of a Physical Broadcast Channel (PBCH) from the network equipment, wherein the DMRS or TRS of the PBCH carries the COT information; or,

and receiving second control information from the network equipment, wherein the second control information carries the COT information.

25. An apparatus for transmitting a random access signal, comprising:

a communication unit, configured to send system information to a terminal device, where the system information is used to indicate one or more of a transmission period, a transmission format, and a system frame number of a random access signal;

the communication unit is further configured to send first control information to the terminal device, where the first control information is used to indicate a subframe number or a slot number or an initial Orthogonal Frequency Division Multiplexing (OFDM) symbol for transmitting the random access signal;

the communication unit is further configured to send adjustment information to the terminal device according to the monitoring result, where the adjustment information is used to instruct to adjust a time unit for sending the random access signal in a first period, the first period is any one of transmission periods of the random access signal indicated by the system information, and the first period includes at least two time units.

26. The apparatus of claim 25, wherein the adjustment information is used to indicate an adjustment of a first time unit for transmitting the random access signal in a first period to a fourth time unit, wherein the first period is any one of transmission periods of the random access signal indicated by the system information, wherein the first period comprises at least two time units, and wherein the first time unit and the fourth time unit belong to the first period.

27. The apparatus according to claim 25 or 26, wherein the random access signal has a plurality of candidate transmission formats, and a ratio of each candidate transmission format in the configuration table of the random access signal is determined according to a duration for transmitting the random access signal corresponding to each candidate transmission format.

28. The apparatus of claim 25, wherein the first control information is specifically configured to indicate:

transmitting an index of one or more subframe numbers of the random access signal, wherein the index of one or more subframe numbers is an absolute subframe number or a relative subframe number; or,

transmitting an index of one or more time slot numbers of the random access signal, wherein the index of one or more time slot numbers is an index of an absolute time slot number or a relative time slot number; or,

transmitting an index of one or more OFDM symbols of the random access signal, the index of one or more OFDM symbols being an index of an absolute OFDM symbol or a relative OFDM symbol.

29. The apparatus of claim 25, wherein the communication unit is further configured to:

and sending Channel Occupation Time (COT) information to the terminal equipment, wherein the COT information is used for indicating the transmission time period occupied by the network equipment, and the transmission time period information comprises the starting time of the transmission time period and/or the duration of the transmission time period.

30. The apparatus of claim 29, wherein the COT information comprises one or more bits, and wherein the communication unit is configured to:

sending a demodulation reference signal (DMRS) or a Tracking Reference Signal (TRS) of a Physical Broadcast Channel (PBCH) to the terminal equipment, wherein the DMRS or TRS of the PBCH carries the COT information; or,

and sending second control information to the terminal equipment, wherein the second control information carries the COT information.

31. A computer storage medium having stored therein computer instructions which, when run on a computer, cause the computer to perform the method of any one of claims 1-9.

32. A computer storage medium having computer instructions stored thereon, which when executed on a computer, cause the computer to perform the method of any one of claims 10-15.

33. A chip comprising a memory for storing a computer program and a processor for reading and executing the computer program stored in the memory, the processor performing the method of any one of claims 1-9 when the computer program is executed.

34. A chip comprising a memory for storing a computer program and a processor for reading and executing the computer program stored in the memory, the processor performing the method of any one of claims 10-15 when the computer program is executed.

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