CN116095647A

CN116095647A - Method for transmitting resource indication information and communication device

Info

Publication number: CN116095647A
Application number: CN202111308796.3A
Authority: CN
Inventors: 王婷; 苏宏家; 卢磊
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2021-11-05
Filing date: 2021-11-05
Publication date: 2023-05-09

Abstract

The embodiment of the application provides a transmission method and a communication device of resource indication information, which are suitable for the fields of Internet of vehicles, intelligent network coupling, auxiliary driving, intelligent driving and the like, can solve the problem that available resources are limited by resource selection auxiliary information indication in the prior art, and further improves a Mode 2 (b) resource allocation Mode. In the method, a first terminal device sends first information to a second terminal device in a first time unit, the first information indicates K candidate single time unit resources to assist the second terminal device in selecting resources, the K candidate single time unit resources belong to Q time units in a time domain, the Q time units belong to a first selection window, the smallest time unit in the Q time units is located in an N time unit after the first time unit, the absolute value of the difference value of any two adjacent time units in the Q time units is P, the P is an integer larger than 1, and K, N is a positive integer.

Description

Method for transmitting resource indication information and communication device

Technical Field

The embodiment of the application relates to the field of communication, in particular to a transmission method and a communication device of resource indication information.

Background

In a New Radio (NR) system, a PC5 interface refers to a communication interface between terminal apparatuses, and a transmission link in the PC5 interface is called a Sidelink (SL).

Among them, the resource allocation (resource allocation, RA) in SL transmission can be divided into two modes (modes) according to the difference of the resource allocation bodies: mode 1 and mode 2. In mode 1, time-frequency resources used for SL transmissions are centrally scheduled by the network device; in mode 2, the time-frequency resources used for SL transmissions are determined by the terminal device. Mode 2 may further include mode 2 (b): in mode 2 (b), however, the UE transmits to the other UE that the resource selection assistance information indicates that there is an excessive risk of the number of bits occupied by the time domain location in the candidate single-slot resource set, while the second-level side-uplink control information (sidelink control information, SCI) has a limited number of bits that can be carried, resulting in a limited total number of candidate single-slot resources carried in the resource assistance information.

Disclosure of Invention

The embodiment of the application provides a method, equipment and a system for transmitting resource indication information, which solve the problem that available resources are limited in resource selection auxiliary information indication in the prior art.

In a first aspect, a method for transmitting resource indication information is provided, which may be performed by the first terminal device, or may also be performed by a component (e.g., a chip or a circuit) of the first terminal device, which is not limited, and for convenience of description, the method will be described below with reference to the embodiment performed by the first terminal device.

The method may include: the first terminal equipment determines a first time unit in a first selection window; the first terminal equipment sends first information to the second terminal equipment in a first time unit, the first information is used for assisting the second terminal equipment in resource selection, the first information indicates K candidate single time unit resources, K is a positive integer, the K candidate single time unit resources belong to Q time units in a time domain, the Q time units belong to a first selection window, the smallest time unit in the Q time units is located in an N time unit after the first time unit, the absolute value of the difference value of any two adjacent time units in the Q time units is P time units, P is an integer larger than 1, and N is a positive integer.

The absolute value of the difference value between any two adjacent time units in the Q time units is P time units, which can be understood as a P-1 time unit interval between any two adjacent time units in the Q time units.

In the above technical solution, the resource selection auxiliary information (i.e. the first information) sent by the first terminal device to the second terminal device is used as a core, and the time window scaling factor P is used to reduce the number of bits that need to be occupied for indicating the K candidate single time unit time domain information, so as to solve the problem in the prior art that the available resources are limited as indicated by the resource selection auxiliary information, and further perfect the Mode 2 (b) resource allocation Mode.

With reference to the first aspect, in certain implementations of the first aspect, a smallest time unit of the Q time units is Q ₁ The largest time unit T in the first selection window _end Therein, Q, T _end P and Q ₁ Satisfy the following requirements

Represents a downward rounding, and Q is a positive integer.

With reference to the first aspect, in some implementations of the first aspect, the first terminal device obtains first selection window information, where the first selection window information includes at least 2 of a start time unit of a selection window, a length of the first selection window, and an end time unit of the first selection window; the first terminal device determines a first selection window according to the first selection window information.

With reference to the first aspect, in certain implementations of the first aspect, the first terminal device receives the first selection window information from the second terminal device.

With reference to the first aspect, in certain implementations of the first aspect, N is configured, or preconfigured, for the network device.

With reference to the first aspect, in some implementations of the first aspect, the first information is indicated by M bits, where M is determined by Q time units, a first number of subchannels, and a total number of subchannels included in the first resource pool, where the first number of subchannels is a number of subchannels occupied by each of the K candidate single-time unit resources.

With reference to the first aspect, in certain implementations of the first aspect, M, Q time units, the first number of subchannels, and the total number of subchannels included in the first resource pool satisfy the following formula:

wherein N is _subCH L is the total number of sub-channels comprised by the first resource pool _subCH,2 For the first number of sub-channels,

representing an upward rounding;

the first information is indicated by M bits, specifically:

front of M bits

One bit is used for indicating time domain information of K candidate single time unit resources, and the latter is among M bits>

The one bit is used to indicate frequency domain information for K candidate single time unit resources.

representing an upward rounding;

the first information is indicated by M bits, specifically:

front of M bits

With reference to the first aspect, in certain implementations of the first aspect, the M, the Q, the first number of subchannels, and the total number of subchannels of the first resource pool satisfy the following first formula:

M＝Q*(N _subCH -L _subCH，2 +1)

wherein N is _subCH L is the total number of sub-channels of the first resource pool _subCH,2 For the first number of subchannels;

the first information is indicated by M bits, including:

the M bits form a bit map, each N of the bit maps _subCH -L _subCH，2 +1 bits indicating each candidate single time unit resource over one of the Q time unitsAvailability of the device.

With reference to the first aspect, in certain implementations of the first aspect, the method further includes: the first terminal device transmits second information including P, Q, the first subchannel number, N, or the number K of candidate single-time unit resources indicated by the first information.

With reference to the first aspect, in certain implementations of the first aspect, the first information is carried in second-stage side uplink control information SCI or medium access control layer control element MAC CE, or radio resource control RRC signaling.

In a second aspect, a method for transmitting resource indication information is provided, which may be performed by the second terminal device, or may also be performed by a component (e.g., a chip or a circuit) of the second terminal device, which is not limited, and for convenience of description, the method will be described below with reference to the embodiment performed by the second terminal device.

The method comprises the following steps: the second terminal equipment receives first information from the first terminal equipment in a first time unit, wherein the first information is used for assisting the second terminal equipment in resource selection, the first information indicates K candidate single time unit resources, K is a positive integer, the K candidate single time unit resources belong to Q time units in a time domain, the Q time units belong to a first selection window, the smallest time unit in the Q time units is located in an N time unit after the first time unit, the absolute value of the difference value of any two adjacent time units in the Q time units is P time units, P is an integer larger than 1, and N is a positive integer; the second terminal equipment determines a first time-frequency resource according to the first information.

The advantageous effects of the second aspect are described in the first aspect, and are not described here.

With reference to the second aspect, in some implementations of the second aspect, a smallest time unit of the Q time units is Q ₁ The largest time unit T in the first selection window _end ，

Therein, Q, T _end P and Q ₁ Satisfy the following requirements

Represents a downward rounding, and Q is a positive integer.

With reference to the second aspect, in some implementations of the second aspect, the second terminal device sends first selection window information to the first terminal device, where the first selection window information includes at least 2 of a start time unit of the selection window, a length of the first selection window, and an end time unit of the first selection window.

With reference to the second aspect, in certain implementations of the second aspect, P is obtained from the second terminal, or P is obtained from the network device, or P is preconfigured.

With reference to the second aspect, in certain implementations of the second aspect, N is configured, or preconfigured, by the network device.

With reference to the second aspect, in some implementations of the second aspect, the first information is indicated by M bits, where M is determined by Q time units, a first number of subchannels, and a total number of subchannels included in the first resource pool, and the first number of subchannels is a number of subchannels occupied by each of the K candidate single-time unit resources.

With reference to the second aspect, in some implementations of the second aspect, M, Q time units, the first number of subchannels, and the total number of subchannels included in the first resource pool satisfy the following formula:

representing an upward rounding;

the first information is indicated by M bits, specifically:

front of M bits

The one bit is used to indicate frequency domain information for K candidate single time unit resources. />

representing an upward rounding;

the first information is indicated by M bits, specifically:

front of M bits

With reference to the second aspect, in certain implementations of the second aspect, the M, the Q, the first number of subchannels, and the total number of subchannels of the first resource pool satisfy the following first formula:

M＝Q*(N _subCH -L _subCH，2 +1)

the first information is indicated by M bits, including:

the M bits form a bit map, each N of the bit maps _subCH -L _subCH，2 +1 bits indicate the availability of each candidate single time unit resource over one of the Q time units.

With reference to the second aspect, in certain implementations of the second aspect, the method further includes: the second terminal equipment receives second information, wherein the second information comprises P, Q, the number of first sub-channels, N or the number K of candidate single time unit resources indicated by the first information; the second terminal device is further configured to parse the first information according to the second information.

With reference to the second aspect, in certain implementations of the second aspect, the first information is carried in second-stage side uplink control information SCI or a medium access control layer control element MAC CE, or radio resource control RRC signaling.

In a third aspect, a communication device is provided for performing the method provided in the first aspect above. In particular, the apparatus may comprise means and/or modules, such as a processing unit and/or a communication unit, for performing the method of the first aspect or any of the above-mentioned implementations of the first aspect.

In one implementation, the apparatus is a first terminal device. When the apparatus is a first terminal device, the communication unit may be a transceiver, or an input/output interface; the processing unit may be at least one processor. Alternatively, the transceiver may be a transceiver circuit. Alternatively, the input/output interface may be an input/output circuit.

In another implementation, the apparatus is a chip, a system-on-chip, or a circuit for use in a first terminal device. When the apparatus is a chip, a system-on-chip or a circuit for use in a first terminal device, the communication unit may be an input/output interface, an interface circuit, an output circuit, an input circuit, a pin or a related circuit or the like on the chip, the system-on-chip or the circuit; the processing unit may be at least one processor, processing circuit or logic circuit, etc.

The advantages of the method as shown in the above third aspect and its possible designs may be referred to the advantages in the first aspect and its possible designs.

In a fourth aspect, a communication device is provided for performing the method provided in the second aspect. In particular, the apparatus may comprise means and/or modules, such as a processing unit and/or a communication unit, for performing the method provided by the second aspect or any of the implementations of the second aspect.

In one implementation, the apparatus is a second terminal device. When the apparatus is a second terminal device, the communication unit may be a transceiver, or an input/output interface; the processing unit may be at least one processor. Alternatively, the transceiver may be a transceiver circuit. Alternatively, the input/output interface may be an input/output circuit.

In another implementation, the apparatus is a chip, a system-on-chip, or a circuit for use in the second terminal device. When the apparatus is a chip, a system-on-chip or a circuit for use in a second terminal device, the communication unit may be an input/output interface, an interface circuit, an output circuit, an input circuit, a pin or a related circuit or the like on the chip, the system-on-chip or the circuit; the processing unit may be at least one processor, processing circuit or logic circuit, etc.

The advantages of the method according to the fourth aspect and possible designs thereof above may be referred to the advantages of the second aspect and possible designs thereof.

In a fifth aspect, there is provided a communication apparatus comprising: comprising at least one processor coupled to at least one memory for storing a computer program or instructions, the at least one processor for invoking and executing the computer program or instructions from the at least one memory to cause a communication device to perform the method of the first aspect or any possible implementation thereof.

In one implementation, the apparatus is a first terminal device.

In another implementation, the apparatus is a chip, a system-on-chip, or a circuit for use in a first terminal device.

The advantages of the method according to the above fifth aspect and possible designs thereof may be referred to the advantages of the first aspect and possible designs thereof.

In a sixth aspect, there is provided a communication apparatus comprising: comprising at least one processor coupled to at least one memory for storing a computer program or instructions, the at least one processor for invoking and executing the computer program or instructions from the at least one memory to cause a communication device to perform the method of the second aspect or any possible implementation thereof.

In one implementation, the apparatus is a second terminal device.

In another implementation, the apparatus is a chip, a system-on-chip, or a circuit for use in the second terminal device.

The advantages of the method according to the above sixth aspect and possible designs thereof may be referred to the advantages of the second aspect and possible designs thereof.

In a seventh aspect, the present application provides a processor configured to perform the method provided in the above aspects.

The operations such as transmitting and acquiring/receiving, etc. related to the processor may be understood as operations such as outputting and receiving, inputting, etc. by the processor, or may be understood as operations such as transmitting and receiving by the radio frequency circuit and the antenna, if not specifically stated, or if not contradicted by actual function or inherent logic in the related description, which is not limited in this application.

In an eighth aspect, a computer readable storage medium is provided, the computer readable storage medium storing program code for execution by a device, the program code comprising instructions for performing the method provided by any one of the above-described first aspect or any one of the above-described second aspect.

A ninth aspect provides a computer program product comprising instructions which, when run on a computer, cause the computer to perform the method provided by any one of the implementations of the first aspect or the second aspect or any one of the implementations of the second aspect or the second aspect.

In a tenth aspect, a chip is provided, the chip including a processor and a communication interface, the processor reading instructions stored on a memory through the communication interface, and executing the method provided by any one of the implementations of the first aspect or the second aspect or any one of the implementations of the second aspect or the second aspect.

Optionally, as an implementation manner, the chip further includes a memory, where a computer program or an instruction is stored in the memory, and the processor is configured to execute the computer program or the instruction stored in the memory, and when the computer program or the instruction is executed, the processor is configured to execute the method provided by any one of the foregoing implementation manners of the first aspect or any one of the foregoing implementation manners of the second aspect or the second aspect.

An eleventh aspect provides a communication system comprising the communication apparatus of the fifth aspect and the sixth aspect.

Drawings

Fig. 1 is a schematic diagram of a resource allocation pattern 2 (a) according to an embodiment of the present application.

Fig. 2 is a schematic structural diagram of a candidate single-slot resource according to an embodiment of the present application.

Fig. 3 is a schematic diagram of a relationship between a resource pool and a maximum candidate single-slot resource according to an embodiment of the present application.

Fig. 4 is a schematic diagram of determining candidate single-slot resources according to a listening result in a sensing window according to an embodiment of the present application.

Fig. 5 is a schematic diagram of a hidden node according to an embodiment of the present application.

Fig. 6 is a schematic diagram of an exposed node according to an embodiment of the present application.

Fig. 7 shows a schematic diagram of the relationship between the first terminal device side slot n, the selection window corresponding to the slot n, and the slot m.

Fig. 8 shows a schematic diagram of the first terminal device determining the resource selection assistance information from a single candidate unit single slot resource set.

Fig. 9 is a schematic structural diagram of a communication system according to an embodiment of the present application.

Fig. 10 is a schematic structural diagram of a communication device according to an embodiment of the present application.

Fig. 11 is a flowchart of a method for transmitting resource indication information according to an embodiment of the present application.

Fig. 12 is a schematic diagram of Q time units according to an embodiment of the present application.

Fig. 13 is a schematic diagram of indicating K candidate single time unit resources according to an embodiment of the present application.

Fig. 14 is a schematic structural diagram of a first terminal device provided in an embodiment of the present application.

Fig. 15 is a schematic structural diagram of a second terminal device provided in an embodiment of the present application.

Detailed Description

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

For the convenience of understanding the technical solutions of the embodiments of the present application, a brief description of related technologies or terms of the present application is given below.

First, resource allocation pattern 2:

the resource allocation pattern 2 may be divided into the following categories: mode 2 (a): the terminal equipment selects a time-frequency resource used by SL transmission based on self-perception (sending); mode 2 (b): the terminal equipment assists other terminal equipment to select time-frequency resources used by SL transmission; mode 2 (c): the terminal equipment selects time-frequency resources used by SL transmission according to one or more SL transmission patterns (patterns) in a configured or preconfigured resource pool; mode 2 (d): the terminal equipment with resource scheduling capability schedules time-frequency resources used by SL transmission for other terminal equipment.

In mode 2, there are defined a time point and two important windows:

The time point refers to: the higher layer (higher layer) of the terminal device triggers a time slot for resource selection for transmission of a physical sidelink control channel (physical sidelink control channel, PSCCH) and/or a physical sidelink shared channel (physical sidelink shared channel, PSSCH). As shown in fig. 1, this time slot may be referred to as time slot n.

One of the two important windows is a sensing window (sensing window), which refers to a window used when the terminal equipment senses the occupation condition of time-frequency resources around the terminal equipment. Exemplary, may correspond to the slot range [ n-T ] in FIG. 1 ₀ ,n-T _proc,0 ]Wherein T is ₀ To calculate the value according to the high-level parameters, T _proc,0 Values defined for the standards, or values derived from capabilities or implementations of the terminal device, or values calculated from higher-layer parameters. The implementation manner of the terminal device may refer to specific software algorithm and hardware implementation of the terminal (such as a computing chip, a communication chip, a storage chip, a vehicle-mounted module and the like used by the terminal).

The other window of the two important windows is a selection window (selection window), which refers to a window used when the terminal device selects a candidate single-slot resource (candidate single-slot resource) based on a sensing result in the sensing window. Exemplary, may correspond to the slot range [ n+T ] in FIG. 1 ₁ ,n+T ₂ ]Wherein T is ₁ T is a value obtained according to the implementation mode of the terminal equipment ₂ Is a value obtained according to a higher layer parameter or an implementation of the terminal device.

In the embodiment of the present application, a time slot refers to a unit of time used when uplink information, downlink information, or side information is transmitted in a system (e.g., an NR system). A slot may include a plurality of minislots, which may include one or more orthogonal frequency division multiplexing (orthogonal frequency division multiplexing, OFDM) symbols. Alternatively, the time slot or micro time slot may be the smallest scheduling unit in the time domain when transmitting uplink information or downlink information or side information.

Wherein, the candidate single time slot resource refers to: a frequency domain length L in a single time slot _subCH A set of sub-channels of the plurality of consecutive sub-channels, wherein L _subCH Higher layer parameters, L, provided for a time slot (e.g., time slot n in fig. 1) in which higher layers of the terminal device trigger resource selection _subCH Is a positive integer. The sub-channels are N _PRB PRB set of consecutive physical resource blocks (physical resource block, PRB), N _PRB Configuring parameters for high layers of a resource pool, N _PRB Is a positive integer. Illustratively, as L _subCH ＝2，N _PRB For example, =10, as shown in fig. 2, a candidate single slot resource is shown.

In addition, one resource pool includes N in the frequency domain _subCH A plurality of continuous sub-channels N _subCH Parameters are configured for higher layers of the resource pool. From this, the maximum number of candidate single-slot resources on a single slot of the resource pool is N _subCH -L _subCH +1. If N _subCH ＝4，L _subCH =2, the maximum number of candidate Shan Shixi sub-resources is N _subCH -L _subCH +1=3, exemplary, as shown in fig. 3, the first candidate single-slot resource includes two sub-channels numbered 0 and 1, the second candidate single-slot resource includes two sub-channels numbered 1 and 2, and the third candidate single-slot resource includes two sub-channels numbered 2 and 3.

In addition, the terminal device may determine one or more resource pools used when the terminal device performs SL transmission according to a higher layer parameter, where the higher layer parameter may be a preconfigured parameter of the terminal device, or may be a configuration parameter from a network device, and different resource pools may be distinguished by using different resource pool identifiers.

Second, resource allocation pattern 2 (a):

based on the above description, the basic flow of the resource allocation pattern 2 (a) can be summarized as the following steps:

step 1, in a time slot n, a high-level trigger of a terminal device selects a time-frequency resource for transmitting a primary PSCCH and/or PSSCH, and provides high-level parameters;

Optionally, the higher layer parameter includes an identification of a resource pool used when transmitting the PSCCH and/or PSSCH, a transmission priority of the PSCCH and/or PSSCH, a number of subchannels used when transmitting the PSCCH and/or PSSCH, and so on.

Step 2, the terminal equipment listens for the side uplink control information (sidelink control information, SCI) sent by other terminal equipment using the resource pool indicated in step 1 in a sensing window;

step 3, the terminal equipment perceives the use condition of the time-frequency resources in the selection window in the resource pool according to the interception result in the step 2, and determines an available candidate single-time-slot resource set, wherein the available candidate single-time-slot resource set does not comprise the time-frequency resources reserved for use by other terminal equipment or possibly occupied by other terminal equipment;

and step 4, the terminal equipment determines time-frequency resources used for transmitting the PSCCH and/or the PSSCH once according to the available candidate single-slot resource set.

For example, fig. 4 is a schematic diagram of determining, by the terminal device, a candidate single-slot resource according to the listening result in the sensing window in the above step 3, where User Equipment (UE) 1, UE2, and UE3 are other terminal devices except the terminal device, SCI1 is SCI of UE1 that is sensed by the terminal device in the sensing window, and SCI1 indicates that the UE1 reserves a part of the time-frequency resources in the selection window, and then the terminal device may exclude the time-frequency resources reserved by the UE 1. Similarly, SCI2 is the SCI of UE2, SCI3 is the SCI of UE3, and the terminal device may determine the available set of candidate single-slot resources by excluding the time-frequency resources reserved by UE2 and UE3 according to SCI2 and SCI3, respectively.

Third, hidden node and exposed node:

in the above mode 2 (a), there is a problem of hidden nodes and exposed nodes.

If the terminal device 1 cannot acquire the use and reservation of the time-frequency resource of the terminal device 2 through the mode 2 (a), the terminal device 2 is called a hidden node of the terminal device 1.

Illustratively, as shown in fig. 5, UE1, UE2, and UE3 all operate in mode 2 (a), and both UE1 and UE3 have data to send to UE2, indicated by black arrows, and the perception ranges of UE1 and UE3 are respectively delineated by corresponding two dashed boxes. Since UE3 is outside the sensing range of UE1, UE1 cannot obtain the usage and reservation of the time-frequency resources of UE3 through sensing, and UE3 is a hidden node for UE 1. Similarly, UE1 is also a hidden node for UE 3. When UE1 selects SL time-frequency resource to send data to UE2 according to the sensing result, since UE1 does not acquire the time-frequency resource usage and reservation of UE3, the same time-frequency resource may be selected as UE3, so that UE2 cannot distinguish data of UE1 and UE3 when receiving data, collision and mutual interference occur, and data transmission from UE1 and UE3 to UE2 may fail.

If terminal device 1 is able to acquire the use and reservation of the time-frequency resources of terminal device 2 through mode 2 (a), but the SL transmission of terminal device 2 does not cause strong interference to the SL transmission of terminal device 1, i.e. does not affect the SL transmission of terminal device 1, then terminal device 2 is referred to as an exposed node of terminal device 1.

Illustratively, as shown in fig. 6, UE1, UE2, UE3, and UE4 all operate in mode 2 (a), UE1 has data to send to UE2, UE3 has data to send to UE4, indicated by black arrows, and the sensing ranges of UE1 and UE3 are respectively delineated by corresponding two dashed boxes. Since UE3 is within the sensing range of UE1, UE1 may acquire the time-frequency resource usage and reservation of UE3 through sensing, however since the SL transmission of UE3 is a transmission between UE3 and UE4, the SL transmission of UE1 to UE2 is not affected, and UE3 is an exposed node for UE 1. Similarly, UE1 is an exposed node for UE 3. When UE1 perceives, the SL time-frequency resources that have been reserved by UE3 will be excluded, however, since the SL transmission of UE1 and the receiving side of the SL transmission of UE3 are different, UE1 may actually use the SL time-frequency resources reserved by UE3, that is, the elimination of the SL time-frequency resources that have been reserved by UE3 by UE1 at the time of the SL transmission may cause a decrease in resource utilization.

Fourth, resource allocation pattern 2 (b):

the Mode 2 (b) resource allocation Mode enables the UE to use the self-perception result to assist other UEs to select SL time-frequency resources, and is a feasible method for solving hidden nodes and exposed nodes. For example, UE2 in fig. 5 may assist UE1 in resource selection to avoid interference with UE 3. For another example, in fig. 6, UE2 may assist UE1 in selecting resources, so as to improve the time-frequency resource utilization.

In the following description, it is assumed that the first terminal device is a transmitting terminal device of the resource selection auxiliary information, and the second terminal device is a receiving terminal device of the resource selection auxiliary information.

Based on the above description, the basic flow of the resource allocation pattern 2 (b) can be summarized as the following steps:

step 1, a first terminal device determines a time slot for transmitting resource selection auxiliary information, wherein the resource selection auxiliary information is auxiliary information for assisting a second terminal device in resource selection.

Specifically, in the time slot n, the higher layer of the first terminal device triggers the physical layer to select a time-frequency resource for the transmission of the primary resource selection auxiliary information; the first terminal device is based on a perceptual window [ n-T ] with respect to time slot n ₀ ,n-T _proc,0 ]The result of the perception in the window [ n+T ] is determined ₁ ,n+T ₂ ]A set of candidate single-slot resources within, which set may be denoted as S _A (n,L _subCH,1 ) Where n represents the time slot n, L _subCH,1 Indicating the number of sub-channels of candidate single-slot resources required for one PSCCH and/or PSSCH transmission containing resource selection assistance information; the first terminal equipment is according to the set S _A (n,L _subCH,1 ) And selecting one candidate single-slot resource on the time slot m, and determining to transmit resource selection auxiliary information to the second terminal equipment on the candidate single-slot resource, wherein the resource selection auxiliary information is auxiliary information for assisting the second terminal equipment in resource selection, and m is an integer greater than or equal to n. By way of example, fig. 7 shows a schematic diagram of a first terminal device side slot n, a selection window corresponding to slot n, and a slot m relationship.

And step 2, the first terminal equipment triggers a resource selection flow for the auxiliary information of resource selection.

Specifically, in the time slot n, the higher layer of the first terminal device triggers the physical layer to select a time-frequency resource for the transmission of the primary resource selection auxiliary information; with respect to time slot n, the first terminal device is based on awarenessWindow [ n-T ] ₀ ,n-T _proc,0 ]The result of the perception in the window [ n+T ] is determined ₁ ,n+T ₂ ]A set of candidate single-slot resources within, which set may be denoted as S _A (n,L _subCH,2 ) Where n represents the time slot n, L _subCH,2 Representing the number of sub-channels of candidate single-slot resources required for one PSCCH and/or PSSCH transmission by the second terminal device; the physical layer of the first terminal device will aggregate S _A (n,L _subCH,2 ) Reporting to the higher layer of the first terminal device.

It should be noted that if the number of sub-channels of the candidate single-slot resources required for one PSCCH and/or PSSCH transmission of the second terminal device is the same as the number of sub-channels of the candidate single-slot resources required for one PSCCH/PSSCH transmission including the resource selection assistance information, i.e., L _subCH,2 ＝L _subCH,1 The first terminal device does not need to perform step 2.

And step 3, the first terminal equipment determines resource selection auxiliary information according to one or more candidate single-slot resource sets.

A possible implementation manner, the first terminal device is according to a single set S _A (n,L _subCH,2 ) The resource selection assistance information transmitted in the slot m is determined.

Optionally, the specific form of the auxiliary information for resource selection may be a sensing result of the first terminal device in a window with a length of Y slots starting from a slot m+t+1, where T is an integer greater than or equal to 0, Y is a positive integer, and the sensing result may be S _A (n,L _subCH,2 ) A subset within a window of Y slots, which subset may be denoted S _Y (m,L _subCH,2 )。

Exemplary, as shown in FIG. 8, the higher layer of the first terminal device triggers resource selection at time slot n, according to L _subCH,2 Obtaining a candidate single-slot resource set S in a selection window _A (n,L _subCH,2 ). Alternatively, the first terminal device may be configured according to S _A (n,L _subCH,2 ) In window [ m+T+1, m+T+Y ]]Subset S of the inner _Y (m,L _subCH,2 ) Resource selection assistance information is determined.

One possible implementation manner, the first terminal device determines resource selection auxiliary information sent in the time slot m according to a plurality of sets. The plurality of sets may be S _A (n,L _subCH,2 )，S _A (n+1,L _subCH,2 )，……，S _A (n ₂ ,L _subCH,2 ) Wherein n is ₂ Is an integer greater than or equal to n and less than or equal to m. Alternatively, the specific form of the auxiliary information for resource selection may be a sensing result of the first terminal device in the window with the length of Y slots starting from the slot m+t+1, the sensing result may be a set of candidate single slot resources in the window with the length of Y slots determined jointly according to multiple sets, and the subset may be represented as S _Y (m,L _subCH,2 )。

Optionally, S _Y (m,L _subCH,2 ) May be a subset of the intersection of the sets within a window of Y slots. The meaning of using intersection is that for a candidate single-slot resource, the candidate single-slot resource is considered to be included in S only if multiple sets each include the candidate single-slot resource _Y (m,L _subCH,2 )。

Optionally, S _Y (m,L _subCH,2 ) Can be initialized to S _A (n,L _subCH,2 ) Subset within the window of Y slots, then updating S according to criteria-defined rules _Y (m,L _subCH,2 )

And 4, the first terminal equipment sends the resource selection auxiliary information to the second terminal equipment.

Correspondingly, the second terminal equipment receives the resource selection auxiliary information from the first terminal equipment and performs resource selection according to the resource selection auxiliary information.

Specifically, in the m time slot, the first terminal device transmits the resource selection auxiliary information to the second terminal device through the second-level SCI, or the MAC CE, or the PC5-RRC signaling. It will be appreciated that the second stage SCI is transmitted in the PSSCH, which has a better flexibility than the first stage SCI (1 st-stage SCI, or SCI format 0-1) transmitted in the PSCCH and can therefore be used to carry resource selection assistance information.

Optionally, resource selectionThe auxiliary information can be in the specific form of a set S of K candidate single-slot resources in a window with the length of Y time slots starting from the time slot m+T+1 _Y (m,L _subCH,2 ) K is a positive integer, and the resource selection auxiliary information can indicate S through a bit map _Y (m,L _subCH,2 )。

In one implementation, for a cell containing N _subCH Resource pool of sub-channels, the auxiliary information of resource selection is realized by X ₁ +X ₂ Indicated by bits, where X ₁ Bits are used to indicate time domain information for each candidate single slot resource, X ₂ Bits are used to indicate frequency domain information, X, for each candidate single slot resource ₁ And X ₂ Are natural numbers.

Wherein the number of bits X ₁ Is determined according to a formula (1):

X ₁ ＝log ₂ (Y ^K )

this is because S _Y (m,L _subCH,2 ) Y possibilities exist in the time domain position of each candidate single-slot resource, and K candidate single-slot resources correspond to Y ^K The probability of the probability, among others,

representing an upward rounding.

Number of bits X ₂ Is determined according to a formula (2):

this is because the number of largest candidate single-slot resources on a single slot is N _subCH -L _subCH,2 +1, i.e., N exists for each candidate single-slot resource in the frequency domain position _subCH -L _subCH,2 +1 possibilities, then K candidate single slot resources correspond to (N _subCH -L _subCH,2 +1) ^K One possibility is to use a single-piece plastic.

According to standard setting, Y is calculated according to 512 in formula (2), N _subCH Calculated as maximum 27, L _subCH,2 Calculating according to the minimum value of 1, when the K value reaches 8, occupyingThe maximum number of bits M will reach 119 and the second stage SCI will be carried over the PSSCH which is transmitted over the polar code, the maximum input of which is only 140 bits, taking account of interleaving etc., which also includes a 24 bit CRC check code. Therefore, the number of resource selection assistance information that can be indicated by the second level SCI in the above scheme is limited.

The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application. Wherein, in the description of the present application, "/" means that the related objects are in a "or" relationship, unless otherwise specified, for example, a/B may mean a or B; the term "and/or" in this application is merely an association relation describing an association object, and means that three kinds of relations may exist, for example, a and/or B may mean: there are three cases, a alone, a and B together, and B alone, wherein a, B may be singular or plural. Also, in the description of the present application, unless otherwise indicated, "at least one" means one or more, and "a plurality" means two or more. "at least one of" or the like means any combination of these items, including any combination of single item(s) or plural items(s). For example, at least one (one) of a, b, or c may represent: a, b, c, a-b, a-c, b-c, or a-b-c, wherein "-" means that the associated object is a "and" relationship, and a, b, c may be single or plural. In addition, in order to clearly describe the technical solutions of the embodiments of the present application, in the embodiments of the present application, the words "first", "second", and the like are used to distinguish the same item or similar items having substantially the same function and effect. It will be appreciated by those of skill in the art that the words "first," "second," and the like do not limit the amount and order of execution, and that the words "first," "second," and the like do not necessarily differ.

The technical scheme of the embodiment of the application can be applied to various communication systems. For example: fifth generation (5 g) communication systems and other systems, etc. The term "system" may be used interchangeably with "network". The 5G communication system is the next generation communication system under study. The 5G communication system includes a non-independent Networking (NSA) 5G mobile communication system, an independent networking (SA) 5G mobile communication system, or an NSA 5G mobile communication system and an SA 5G mobile communication system. In addition, the communication system can be also suitable for future communication technologies, and the technical scheme provided by the embodiment of the application is applicable. The above-mentioned communication system to which the present application is applied is merely illustrative, and the communication system to which the present application is applied is not limited thereto, and is generally described herein, and will not be described in detail.

In addition, the technical solution provided in the embodiments of the present application may be applied to a cellular link, and may also be applied to a link between devices, for example, a device to device (D2D) link or a vehicle networking (vehicle to everything, V2X) link. The D2D link or V2X link may also be referred to as a side link, secondary link, or sidelink, among others. In the embodiment of the present application, the D2D link, the V2X link, the side link, the auxiliary link, or the side link refer to links established between devices of the same type, which have the same meaning. The devices of the same type may be links between terminal devices, links between relay nodes, or the like, and the embodiment of the present application is not limited to this. For the link between the terminal device and the terminal device, there is a D2D link defined by release (Rel) -12/13 of 3GPP, and there is also a V2X link defined by 3GPP for the internet of vehicles, vehicle-to-vehicle, vehicle-to-handset, or vehicle-to-any entity, including Rel-14/15. Also included are Rel-16, currently under investigation by 3GPP, and later releases of V2X links based on NR systems, etc.

As shown in fig. 9, a communication system 10 is provided in an embodiment of the present application. The communication system 10 comprises a first terminal device 20 and a second terminal device 30. The first terminal device 20 and the second terminal device 30 can directly communicate through the PC5 interface, and the direct communication link between the first terminal device 20 and the second terminal device 30 is SL.

Alternatively, the terminal device (including the first terminal device and the second terminal device) in the embodiment of the present application is a device for implementing a wireless communication function, for example, a terminal or a chip that may be used in the terminal. The terminal may be a User Equipment (UE), an access terminal, a terminal unit, a terminal station, a mobile station, a remote terminal, a mobile device, a wireless communication device, a terminal agent, a terminal apparatus, or the like in a 5G network or a future evolved PLMN. An access terminal may be a cellular telephone, cordless telephone, session initiation protocol (session initiation protocol, SIP) phone, wireless local loop (wireless local loop, WLL) station, personal digital assistant (personal digital assistant, PDA), handheld device with wireless communication capability, computing device or other processing device connected to a wireless modem, vehicle-mounted device or wearable device, virtual Reality (VR) terminal device, augmented reality (augmented reality, AR) terminal device, wireless terminal in industrial control (industrial control), wireless terminal in self-driving (self-driving), wireless terminal in telemedicine (remote medium), wireless terminal in smart grid (smart grid), wireless terminal in transportation security (transportation safety), wireless terminal in smart city (smart city), wireless terminal in smart home (smart home), etc. The terminal may be mobile or stationary. The terminal device in the embodiment of the present application may also be a vehicle-mounted module, a vehicle-mounted component, a vehicle-mounted chip, or a vehicle-mounted unit that is built in a vehicle as one or more components or units, and the vehicle may implement the method of the present application through the built-in vehicle-mounted module, vehicle-mounted component, vehicle-mounted chip, or vehicle-mounted unit.

Alternatively, the terminal device (including the first terminal device 20 and the second terminal device 30) in the embodiment of the present application may also be referred to as a communication apparatus, which may be a general purpose device or a special purpose device, which is not specifically limited in the embodiment of the present application.

Alternatively, in the embodiment of the present application, the first terminal device 20 and the second terminal device 30 in fig. 9 may be implemented by the communication device (or the communication means) 50 in fig. 10. Fig. 10 is a schematic structural diagram of a communication device 50 according to an embodiment of the present application. The communication device 50 comprises one or more processors 501 and at least one communication interface (which is illustrated in fig. 8 as comprising a communication interface 504 and one processor 501 by way of example only), optionally a memory 503; optionally, a communication bus 502 may also be included.

In the alternative, processor 501, communication interface 504, or memory 503 may be coupled together (not shown in FIG. 10), or, as shown in FIG. 10, may be coupled together via communication bus 502.

The processor 501 may be a general purpose central processing unit (central processing unit, CPU), microprocessor, application-specific integrated circuit (ASIC), or one or more integrated circuits for controlling the execution of the programs of the present application.

The communication bus 502 may be a peripheral component interconnect standard (peripheral component interconnect, PCI) bus or an extended industry standard architecture (extended industry standard architecture, EISA) bus, or the like. The bus may be classified as an address bus, a data bus, a control bus, etc. For ease of illustration, only one dashed line is shown in FIG. 10, but not only one bus or one type of bus. The communication bus 502 may be used to connect different components in the communication device 50 so that the different components may communicate.

The communication interface 504, which may be a transceiver module, is used to communicate with other devices or communication networks, such as ethernet, radio access network (radio access network, RAN), wireless local area network (wireless local area networks, WLAN), etc. For example, the transceiver module may be a device such as a transceiver, or the like. Optionally, the communication interface 504 may also be a transceiver circuit located in the processor 501, so as to implement signal input and signal output of the processor.

The memory 503 may be a device having a memory function. For example, but not limited to, a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a random access memory (random access memory, RAM) or other type of dynamic storage device that can store information and instructions, an electrically erasable programmable read-only memory (electrically erasable programmable read-only memory, EEPROM), a compact disc read-only memory (compact disc read-only memory) or other optical disk storage, optical disk storage (including compact discs, laser discs, optical discs, digital versatile discs, blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. The memory may be self-contained and coupled to the processor via communication line 502. The memory may also be integrated with the processor.

The memory 503 is used for storing computer instructions for executing the embodiments of the present application, and is controlled by the processor 501 to execute the instructions. The processor 501 is configured to execute computer instructions stored in the memory 503 to implement the methods provided in the embodiments of the present application.

Alternatively, in the embodiment of the present application, the processor 501 may perform functions related to processing in a method provided in the embodiment of the present application, where the communication interface 504 is responsible for communicating with other devices or communication networks, and the embodiment of the present application is not limited in detail.

Alternatively, the computer instructions in the embodiments of the present application may be referred to as application program codes, which are not specifically limited in the embodiments of the present application.

In a particular implementation, as one embodiment, processor 501 may include one or more CPUs, such as CPU0 and CPU1 in FIG. 10.

In a particular implementation, as one embodiment, the communication device 50 may include multiple processors, such as processor 501 and processor 508 in FIG. 10. Each of these processors may be a single-core (single-CPU) processor or may be a multi-core (multi-CPU) processor. A processor herein may refer to one or more devices, circuits, and/or processing cores for processing data (e.g., computer program instructions).

In a specific implementation, as an embodiment, the communication device 50 may further include an output device 505 and an input device 506. The output device 505 communicates with the processor 501 and may display information in a variety of ways. For example, the output device 505 may be a liquid crystal display (liquid crystal display, LCD), a light emitting diode (light emitting diode, LED) display device, a Cathode Ray Tube (CRT) display device, or a projector (projector), or the like. The input device 506 is in communication with the processor 501 and may receive user input in a variety of ways. For example, the input device 506 may be a mouse, a keyboard, a touch screen device, a sensing device, or the like.

It will be appreciated that the structure shown in fig. 10 does not constitute a specific limitation on the terminal device. For example, in other embodiments of the present application, a terminal device may include more or fewer components than shown, or certain components may be combined, or certain components may be split, or different arrangements of components. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

In the following, with reference to the accompanying drawings, the transmission method of the resource indication information provided in the embodiment of the present application will be described by taking the first terminal device 20 shown in fig. 9 as the data transmitting end and the second terminal device as the data receiving end as an example.

It should be noted that, in the embodiments described below, the names of the messages between the network elements or the names of the parameters in the messages are only an example, and may be other names in specific implementations, which are not limited in the embodiments of the present application.

As shown in fig. 11, a method for transmitting resource indication information according to an embodiment of the present application includes the following steps:

s1101, the first terminal device determines a first time unit in the first selection window.

This step is referred to as step one in the basic flow of the resource allocation pattern 2 (b), and will not be described here again. Taking FIG. 12 as an example, the first selection window in this step is [ T ] _start ,T _end ]The first time unit is a time unit m for transmitting resource auxiliary information (i.e., first information in this embodiment), and the first information will be described in detail below, which will not be described here.

Optionally, the method further comprises: the method comprises the steps that first terminal equipment obtains first selection window information, wherein the first selection window information comprises at least 2 of a start time unit of a first selection window, the length of the first selection window and an end time unit of the first selection window; the first terminal blogging determines a first selection window according to the first selection window information.

Note that, since the first information is used to assist the second terminal device in resource assist, T in this embodiment _start And T _end Is determined on the basis of parameters associated with the second terminal device, i.e. the first selection window in this embodiment is associated with the second terminal device.

Optionally, the first terminal device receives the first selection window information from the second terminal device.

It should be noted that, in the embodiment of the present application, the time unit may be one of an OFDM symbol, a minislot, a slot, a subframe, a frame, or a minimum scheduling unit in a time domain.

S1102, the first terminal equipment sends first information to the second terminal equipment in a first time unit. Correspondingly, the second terminal device receives the first information in the first time unit.

The first information is used for assisting the second terminal equipment in resource selection, and indicates K candidate single time unit resources, wherein K is a positive integer. The K candidate single time unit resources belong to Q time units in the time domain, the Q time units belong to a first selection window, the smallest time unit in the Q time units is the N time unit after the first time unit, the absolute value of the difference value between any two adjacent time units in the Q time units is P time units, P is an integer larger than 1, and N is a positive integer. For example, there are 20 consecutive slots, slot 1 to slot 20 from small to large, respectively, and q=4 slots are respectively slot 2, slot 8, slot 14, slot 20, then p=6.

Alternatively, P in the present application may be referred to as a time window scaling factor, which is not specifically limited in the present application.

Optionally, P and/or N are preconfigured or network device configured or predefined, which is not limited in this application.

Alternatively, P may be a pre-configured mapping table. For example: p configures 5,8,10,15 only these 4 values, P may be indicated by 2 bits.

Alternatively, when N is predefined, the value of N is defined as T _proc,1 ，T _proc,1 Defined in Rel-16. Table 1 shows the N possible values, μ _SL Taking 0,1, 2, 3 indicates subcarrier spacings 15, 30, 60, 120, respectively.

TABLE 1

μ _SL	T _proc,1
		0	3
1	5
		2	17
3	3

It should be noted that the K candidate single time unit resources are located in different time units in the time domain.

It should be further noted that, because the first information is used to assist the second terminal device in selecting resources, candidate single time unit resources in the K candidate single time unit resources indicated by the first information include a time unit in a time domain, and the number of sub-channels included in the frequency domain is a first number of sub-channels, where the first number of sub-channels is a number of sub-channels of the candidate single time unit resources required by the second terminal device to transmit the PSSCH and/or PSCCH once.

Alternatively, the first number of sub-channels may be sent by the second terminal device to the first terminal device; or, the first terminal device may determine the channel according to the history data of the second terminal device, or the current channel use status, etc. for example; alternatively, it may be specified by a protocol, and embodiments of the present application are not specifically limited thereto.

It should be noted that, in the embodiment of the present application, the candidate single time unit resource may also include one or more consecutive PRBs, or one or more consecutive subcarriers, or one or more minimum scheduling units in the consecutive frequency domain. That is, the candidate single time unit resource includes one time unit in the time domain and one or more consecutive subchannels in the frequency domain; alternatively, the candidate single time unit resource comprises one time unit in the time domain and one or more contiguous PRBs in the frequency domain; alternatively, the candidate single time unit resource comprises one time unit in the time domain and one or more minimum scheduling units in the contiguous frequency domain in the frequency domain. The following embodiments of the present application are described by taking the example that the candidate single time unit resource includes one time unit in the time domain and one or more consecutive subchannels in the frequency domain.

Optionally, the smallest time unit of the Q time units is Q ₁ The largest time unit T in the first selection window _end Therein, Q, T _end P and Q ₁ Satisfy the following requirements

Represents a downward rounding, and Q is a positive integer.

Taking fig. 7 as an example, the smallest time unit among the Q time unitsQ ₁ The nth time unit located after the first time unit can be understood as: the smallest time unit of the Q time units is Q ₁ =m+n. End time unit T of first selection window _end . Then, the K candidate single time unit resources indicated by the first indication information are part or all of single time unit resources whose time domain positions are located on Q time units determined by the period P from the time unit m+n, specifically, the Q time units may be m+ N, m +n+ P, m +n+2*P, … …, m+n+ (Q-1) P, and so on. Here Q time units are illustrated in connection with fig. 12.

Exemplary, as shown in fig. 12, the first terminal device triggers a selection of time-frequency resources for transmission of the first information in time unit n, where the first selection window has a start time unit of T _start The largest time unit T in the first selection window _end The minimum time unit in the Q time units is Q1=m+N, the number of the first sub-channels is equal to 2, and the K candidate single time unit resources are time domain positions in [ m+T+1, T _end ]Window of window

And part or all of the single time unit resources on the time units are m+ N, m +n+ P, m +n+2*P and m+n+3*P respectively, so that the K candidate single time unit resources are part or all of resource 1 with the time domain position of m+n, resource 2 with the time domain position of m+n+2*P, resource 3 with the time domain position of m+n+2*P and resource 4 with the time domain position of m+n+3*P, and K is a positive integer less than or equal to 4.

Alternatively, the first information may be indicated by M bits, which are determined by Q, the first number of subchannels, and the total number of subchannels of the first resource pool.

For example, the first information is indicated by x1+x2=m bits, where X1 bits are used to indicate time domain information of each candidate single-slot resource, X2 bits are used to indicate frequency domain information of each candidate single-slot resource, and X1 and X2 are integers greater than or equal to 0.

In one specific implementation, X1 and X2 satisfy the following formulas with Q, the number of first subchannels, and the total number of subchannels of the first resource pool, respectively:

that is, M and Q, the first number of subchannels, and the total number of subchannels of the first resource pool satisfy the following formula (3):

wherein N is _subCH For the total number of sub-channels of the first resource pool, L _subCH,2 For the first number of sub-channels,

representing an upward rounding.

It can be understood that, in the K candidate single time unit resources indicated by the first information, Q possibilities exist in the time domain position of each candidate single time unit resource, and the K candidate single time unit resources correspond to Q ^K The probability, therefore, as shown in fig. 13, X1 bits may indicate time domain information of K candidate single time unit resources.

It will be appreciated that the number of largest candidate single time unit resources per single time unit is N _subCH -L _subCH,2 +1, each candidate single time unit resource has N in frequency domain position _subCH -L _subCH,2 +1 possibilities, then the frequency domain locations of the K candidate single time unit resources coexist (N _subCH -L _subCH,2 +1) ^K The probability, therefore, X2 bits may indicate the frequency domain information of the K candidate single time unit resources as shown in fig. 13.

For example, n=1, t in fig. 12 _start ＝5，T _end ＝401，m＝10，N＝7，P＝10，K＝3，N _subCH ＝5，L _subCH,2 =2, m+n=17, Q satisfies m+t+1+ (Q-1) p+.ltoreq.t _end It can be derived that q=39, then

Bits indicate time domain information of 1 candidate single time unit resource,/for>

The bits indicate frequency domain information for 1 candidate single time unit resource. For 3 candidate single time unit resources, a total of 6×3+2×3=24 bits are required to indicate time domain information and frequency domain information of the 3 candidate single time unit resources. If the time domain position of resource #1 in the K candidate single time unit resources is located on the 11 th time unit in the Q time units, the time domain information of resource #1 may be represented by 000101.

It can be seen that, in the above example, the first terminal device indicates k=3 through the formula (3), and the number of bits that the time domain information indicating K candidate single time unit resources needs to occupy is log ₂ (39 ³ ) Whereas the prior art indicates that the number of bits occupied by the time domain information of k=3 candidate single time unit resources is log by the formula (1) ₂ (385 ³ ) Wherein 385 is the smallest time unit of the Q time units and the largest time unit T of the first selection window _end Window length in between, i.e. T _end - (m+n) +1=401-17+1=385, it can be seen that the number of bits required for the present application to indicate the same candidate single time unit resource is smaller, so that the problem in the prior art that SCI indicates that the available resources of the first information are limited can be solved.

In another specific implementation, X1 and X2 satisfy the following formulas with Q, the number of first subchannels, and the total number of subchannels of the first resource pool, respectively:

that is, M and Q, the first number of subchannels, and the total number of subchannels of the first resource pool satisfy the following formula (4):

the first information is indicated by M bits, specifically: front of M bits

A bit is used for indicating time domain information of the K candidate single time unit resources, and the latter one of the M bits

And the frequency domain information of the K candidate single time unit resources is indicated by a bit.

The method indicated by X1 in equation (4) is applicable to the case where the time domains do not overlap.

In yet another specific implementation, M and Q, the first number of subchannels, and the total number of subchannels of the first resource pool satisfy the following equation (5):

M＝Q*(N _subCH -L _subCH，2 +1)

wherein N is _subCH For the total number of sub-channels of the first resource pool, L _subCH,2 A first number of subchannels;

the first information is indicated by M bits, including: m bits constitute a bit map, every N in the bit map _subCH -L _subCH，2 +1 bits indicate the availability of each candidate single time unit resource over one of the Q time units.

Optionally, when the K candidate single time unit resources are indicated by the first information, the method provided in the present application may further include: the first terminal device sends second information to the second terminal device. Correspondingly, the second terminal equipment receives the second information from the first terminal equipment and analyzes the first information according to the second information. The content of the second information is described in detail in S1103, which is not described here.

Alternatively, the first terminal device may send the first information to the second terminal device in a plurality of ways.

In a possible implementation manner, the first terminal device sends first information to the second terminal device, which may include: the first terminal device sends a second level SCI to the second terminal device, the second level SCI comprising the first information. Accordingly, the second terminal device receiving the first information from the first terminal device may include: the second terminal device receives the second level SCI from the first terminal device.

Based on this scheme, since the second stage SCI transmits in the PSSCH, which has better flexibility than the first stage SCI transmitted in the PSCCH, the transmission flexibility of the first information can be improved by transmitting the first information through the second stage SCI.

In another possible implementation manner, the sending, by the first terminal device, the first information to the second terminal device may include: the first terminal device sends a medium access control layer control element (medium access control control element, MAC CE) to the second terminal device, the MAC CE comprising the first information. Accordingly, the second terminal device receiving the first information from the first terminal device may include: the second terminal device receives the MAC CE from the first terminal device.

In another possible implementation manner, the sending, by the first terminal device, the first information to the second terminal device may include: the first terminal device sends radio resource control (radio resource control, RRC) signaling to the second terminal device, the RRC signaling including the first information. Accordingly, the second terminal device receiving the first information from the first terminal device may include: the second terminal device receives the RRC signaling from the first terminal device. It is understood that the RRC signaling may be PC5-RRC signaling.

Alternatively, the first terminal device may send the first information to the second terminal device only through one of the three manners, for example, send the information of K candidate single time unit resources to the second terminal device through the second-stage SCI; the first information may also be sent to the second terminal device by a combination of the three manners, for example, information of a part of candidate single time unit resources in the K candidate single time unit resources is sent to the second terminal device by SCI, and information of another part of candidate single time unit resources in the K candidate single time unit resources is sent to the second terminal device by MAC CE.

S1103, the second terminal equipment determines a first time-frequency resource according to the first information.

Wherein the first time-frequency resource is used for the second terminal equipment to send PSSCH and/or PSCCH.

Optionally, the determining, by the second terminal device, the first time-frequency resource according to the first information may include: and the second terminal equipment determines part or all of the K candidate single time unit resources indicated by the first information as first time-frequency resources.

Optionally, when the first indication information is indicated by M bits, and the value of the M bits satisfies the above formula (3), the method for transmitting the resource indication information provided in the present application may further include: the first terminal device sends second information to the second terminal device. Correspondingly, the second terminal equipment receives the second information from the first terminal equipment and analyzes the first information according to the second information.

Wherein the second information may include at least one of: q, a time window scaling factor P, a number K of candidate single time unit resources indicated by the first information, a first number of subchannels, and N. The effect of transmitting the above parameters is specifically described below.

Time window scaling factor P: and the second terminal equipment analyzes the time domain information of the corresponding K candidate resources according to the value of P. In case P is predefined, the parameter need not be sent.

The maximum indicated time unit length Q in the first information: the first terminal device indicates that the parameter can help the second terminal device resolve

Time domain information corresponding to the bits can also help the second terminal equipment to analyze

And specific corresponding frequency domain information. It should be noted that if the second terminal device will L _subCH,2 Indicated to the first terminal device, the second terminal device is then capable according to +.>

N _subCH And L _subCH,2 Obtaining K, further, the second terminal device has the capability according to +.>

And obtaining Q, wherein the first terminal equipment does not need to indicate the parameter Q. In addition, if the value of Q is a standard defined value, or a value configured on the resource pool, the first terminal device does not need to indicate the parameter Q either. In addition, if the first terminal device has indicated K to the second terminal device, the second terminal device is capable according to +. >

And K gets Q, in which case the first terminal device also does not need to indicate the parameter Q.

Number of candidate single time unit resources K: the first terminal device indicates that the parameter can help the second terminal device resolve

Bit-corresponding frequency domain information.

It should be noted that if the first terminal device has indicated Q in the resource selection auxiliary information to the second terminal device, or the value of Q is a value defined by a standard, or the value of Q is a value configured in the resource pool, the second terminal deviceThe device capability is based on

And Q gets K, at which time the first terminal device does not need to indicate the parameter K. In addition, if the first terminal device has already moved L _subCH,2 To the second terminal device, the second terminal device is then according to +.>

N _subCH And L _subCH,2 It is possible to obtain K, in which case the first terminal device also does not need to indicate the parameter K.

First number of sub-channels L _subCH,2 : the first terminal device indicates that the parameter can help the second terminal device resolve

The corresponding time domain information can also help the second terminal device to analyze +.>

Bit-corresponding frequency domain information. It should be noted that if the second terminal device will L _subCH,2 Indicated to the first terminal device, the first terminal device does not need to indicate the parameter L _subCH,2 . In addition, if the first terminal device has indicated the length Y of the first time window to the second terminal device, or the value of Y is a standard defined value, or the value of Y is a value configured in the resource pool, the second terminal device has the capability according to +.>

And Y to K, further, the second terminal device has the capability according to

K and N _subCH Obtaining L _subCH,2 The first terminal device does not need to indicate the parameter L at this time _subCH,2 . In addition, if the first terminal device has indicated K to the second terminal device, the second terminal device capabilities are according to

N _subCH And K to obtain L _subCH,2 The first terminal device does not need to indicate the parameter L at this time _subCH,2 。

The time unit interval between the time unit of the first terminal device sending the first information and the smallest time unit in the Q time units is T: the first terminal device indicates that the parameter can help the second terminal device to acquire the time domain position of the window corresponding to the resource selection auxiliary information. Alternatively, if the standard defines t+p+.w, where W is a value defined by the standard, or a value configured on the resource pool, then T and P may be indicated simultaneously in a manner similar to the starting length indication value (start and Length Indicator Value, SLIV), where the first terminal device does not need to separately indicate P to the second terminal device, and the SLIV is a technique in the standard that indicates the physical layer downlink shared channel (physical downlink shared channel, PDSCH) and the physical layer uplink shared channel (physical uplink shared channel, PUSCH) to indicate one starting OFDM symbol and the number of occupied OFDM symbols in a slot of 14 OFDM symbols in length. Alternatively, the technique is used to generate the parameter SLIV from T and P when T and P are indicated, as follows: if T+P.ltoreq.W/2, SLIV=W..cndot.W. (P-1) +T, otherwise SLIV=W.cndot.W. (W-P+1) + (W-P-T), where W/2< T+P.ltoreq.W. The second terminal device may parse the SLIV value and obtain the values of T and P.

Based on the scheme, the method for reducing the bit number occupied by the first information by using the time window scaling factor P when indicating the time domain information is provided by taking the resource selection auxiliary information (namely the first information) sent by the first terminal equipment to the second terminal equipment as a core, the problem that available resources are limited in the prior art indicated by the resource selection auxiliary information is solved, and the Mode2 (b) resource allocation Mode is further perfected.

The actions of the first terminal device or the second terminal device in the embodiment shown in fig. 11 described above may be invoked by the processor 501 in the communication device 50 shown in fig. 10 to instruct the network device to execute the application code stored in the memory 503.

It is understood that in the embodiment of the present application, the first terminal device or the second terminal device may perform some or all of the steps in the embodiment of the present application, these steps are merely examples, and the embodiment of the present application may also perform other steps or variations of various steps. Furthermore, the various steps may be performed in a different order presented in embodiments of the present application, and it is possible that not all of the steps in embodiments of the present application may be performed.

In the various embodiments of the application, if there is no specific description or logical conflict, terms and/or descriptions between the various embodiments are consistent and may reference each other, and features of the various embodiments may be combined to form new embodiments according to their inherent logical relationships.

It will be appreciated that the various numerical numbers referred to in the embodiments of the present application are merely for ease of description and are not intended to limit the scope of the embodiments of the present application. The sequence number of each process does not mean the sequence of the execution sequence, and the execution sequence of each process should be determined according to the function and the internal logic.

It will be appreciated that in the above embodiments, the method and/or steps implemented by the first terminal device may also be implemented by a component (e.g., a chip or a circuit) that may be used in the first terminal device, and the method and/or steps implemented by the second terminal device may also be implemented by a component (e.g., a chip or a circuit) that may be used in the second terminal device.

The above description has been presented mainly from the point of interaction between the network elements. Correspondingly, the embodiment of the application also provides a communication device which is used for realizing the various methods. The communication device may be the first terminal device in the above method embodiment, or a device including the first terminal device, or a component usable with the first terminal device; alternatively, the communication device may be the second terminal device in the above embodiment of the method, or a device including the second terminal device, or a component usable with the second terminal device. It will be appreciated that the communication device, in order to achieve the above-described functions, comprises corresponding hardware structures and/or software modules performing the respective functions. Those of skill in the art will readily appreciate that the elements and algorithm steps of the examples described in connection with the embodiments disclosed herein may be implemented as hardware or combinations of hardware and computer software. Whether a function is implemented as hardware or computer software driven hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

The embodiment of the application may divide the functional modules of the communication device according to the embodiment of the method, for example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module. The integrated modules may be implemented in hardware or in software functional modules. It should be noted that, in the embodiment of the present application, the division of the modules is schematic, which is merely a logic function division, and other division manners may be implemented in actual implementation.

For example, the communication apparatus is taken as an example of the first terminal device in the above-mentioned method embodiment. Fig. 14 shows a schematic structural diagram of a first terminal device 160. The first terminal device 160 includes a processing module 1601 and a transceiver module 1602. The transceiver module 1602, which may also be referred to as a transceiver unit, is configured to perform a transmitting and/or receiving function, and may be, for example, a transceiver circuit, a transceiver, or a communication interface.

The transceiver module 1602 may include a receiving module and a transmitting module, which are respectively configured to perform steps of the receiving and transmitting classes performed by the first terminal device in the above method embodiment, and the processing module 1601 may be configured to perform steps of the receiving and transmitting classes performed by the first terminal device in the above method embodiment.

The processing module 1601 is configured to determine a first time unit in a first selection window;

the transceiver module 1602 is configured to send, at the first time unit, first information to a second terminal device, where the first information is used to assist the second terminal device in selecting resources, the first information indicates K candidate single time unit resources, where K is a positive integer, the K candidate single time unit resources belong to Q time units in a time domain, the Q time units belong to the first selection window, a smallest time unit in the Q time units is located in an nth time unit after the first time unit, an absolute value of a difference value between any two adjacent time units in the Q time units is P time units, P is an integer greater than 1, and N is a positive integer.

Optionally, the transceiver module 1602 is further configured to obtain the first selection window information, where the first selection window information includes at least 2 of a start time unit of the first selection window, a length of the first selection window, and an end time unit of the first selection window; the processing module 1601 determines the first selection window according to the first selection window information.

Optionally, the transceiver module 1602 is specifically configured to receive the first selection window information from the second terminal device. Optionally, the transceiver module 1602 is configured to send the first information to the second terminal device, including: a transceiver module 1602 for transmitting second-level side uplink control information SCI to a second terminal device, the second-level SCI including first information; or, the transceiver module 1602 is configured to send a medium access control layer control element MAC CE to the second terminal device, where the MAC CE includes first information; or, the transceiver module 1602 is configured to send radio resource control RRC signaling to the second terminal device, where the RRC signaling includes the first information.

Optionally, the transceiver module 1602 is further configured to send second information to the second terminal device, where the second information includes one or more of: p, Q, a first number of subchannels, a time-unit interval, or a number of candidate single-time-unit resources indicated by the first information, wherein the time-unit interval is an interval between a time unit transmitting the first information and a smallest time unit of the Q time units.

All relevant contents of each step related to the above method embodiment may be cited to the functional description of the corresponding functional module, which is not described herein.

In the present embodiment, the first terminal device 160 is presented in a form of dividing the respective functional modules in an integrated manner. A "module" herein may refer to a particular ASIC, an electronic circuit, a processor and memory that execute one or more software or firmware programs, an integrated logic circuit, and/or other device that can provide the described functionality. In a simple embodiment, it will be appreciated by those skilled in the art that the first terminal device 160 may take the form of the communication apparatus 50 shown in fig. 10.

For example, the processor 501 in the communication apparatus 50 shown in fig. 10 may cause the communication apparatus 50 to execute the transmission method of the resource instruction information in the above-described method embodiment by calling the computer-executable instructions stored in the memory 503.

Specifically, the functions/implementation procedures of the processing module 1601 and the transceiver module 1602 in fig. 14 may be implemented by the processor 501 in the communication device 50 shown in fig. 10 calling computer-executable instructions stored in the memory 503. Alternatively, the function/implementation procedure of the processing module 1601 in fig. 14 may be implemented by the processor 501 in the communication device 50 shown in fig. 10 invoking computer-executable instructions stored in the memory 503, and the function/implementation procedure of the transceiver module 1602 in fig. 14 may be implemented by the communication interface 504 in the communication device 50 shown in fig. 10.

Since the first terminal device 160 provided in this embodiment may execute the above-mentioned method for transmitting the resource indication information, the technical effects that can be obtained by the first terminal device may refer to the above-mentioned method embodiment, and will not be described herein.

Or, for example, the communication apparatus is taken as the second terminal device in the above method embodiment. Fig. 15 shows a schematic structural diagram of a second terminal device 170. The second terminal device 170 comprises a processing module 1701 and a transceiver module 1702. The transceiver module 1702, which may also be referred to as a transceiver unit, may be, for example, a transceiver circuit, a transceiver, or a communication interface, for implementing a transmitting and/or receiving function.

The transceiver module 1702 may include a receiving module and a transmitting module, which are respectively configured to perform the steps of the receiving and transmitting class performed by the second terminal device in the above method embodiment, and the processing module 1701 may be configured to perform other steps of the receiving and transmitting class performed by the second terminal device in the above method embodiment.

The transceiver module 1702 is configured to receive, at the first time unit, first information from a first terminal device, where the first information is used to assist a second terminal device in selecting resources, where the first information indicates K candidate single time unit resources, where K is a positive integer, the K candidate single time unit resources belong to Q time units in a time domain, the Q time units belong to the first selection window, a smallest time unit of the Q time units is an nth time unit after the first time unit, an absolute value of a difference value between any two adjacent time units of the Q time units is P time units, P is an integer greater than 1, and N is a positive integer;

A processing module 1701, configured to determine a first time-frequency resource according to the first information.

Optionally, the processing module 1701 is configured to determine a first time-frequency resource according to the first information, and includes: and a processing module 1701, configured to determine a first time-frequency resource according to the first information and a first candidate single-time-unit resource set, where the first candidate single-time-unit resource set is a candidate single-time-unit resource set determined by the second terminal device.

Optionally, the processing module 1701 is configured to determine a first time-frequency resource according to the first information, and includes: a processing module 1701, configured to determine, as the first time-frequency resource, some or all candidate single-time-unit resources of the K candidate single-time-unit resources indicated by the first information.

Optionally, the transceiver module 1702 is configured to receive first information from a first terminal device, including: a transceiver module 1702 for receiving second-level side uplink control information SCI from a first terminal device, the second-level SCI including first information; or, the transceiver module 1702 is configured to receive a MAC CE from a first terminal device, where the MAC CE includes first information; alternatively, the transceiver module 1702 is configured to receive radio resource control RRC signaling from the first terminal device, where the RRC signaling includes the first information.

Optionally, the transceiver module 1702 is further configured to receive second information from the first terminal device, where the second information includes one or more of the following: p, Q, the number of first sub-channels, the time unit interval, or the number of candidate single time unit resources indicated by the first information, where the time unit interval is the number of time units spaced between the time unit sending the first information and the smallest time unit of the Q time units, i.e., N-1; the processing module 1701 is further configured to parse the first information according to the second information.

In the present embodiment, the second terminal device 170 is presented in a form of dividing the respective functional modules in an integrated manner. A "module" herein may refer to a particular ASIC, an electronic circuit, a processor and memory that execute one or more software or firmware programs, an integrated logic circuit, and/or other device that can provide the described functionality. In a simple embodiment, it will be appreciated by those skilled in the art that the second terminal device 170 may take the form of the communication apparatus 50 shown in fig. 10.

Specifically, the functions/implementation procedures of the processing module 1701 and the transceiver module 1702 in fig. 15 may be implemented by the processor 501 in the communication device 50 shown in fig. 10 invoking computer-executed instructions stored in the memory 503. Alternatively, the function/implementation procedure of the processing module 1701 in fig. 15 may be implemented by the processor 501 in the communication device 50 shown in fig. 10 invoking computer executable instructions stored in the memory 503, and the function/implementation procedure of the transceiver module 1702 in fig. 15 may be implemented by the communication interface 504 in the communication device 50 shown in fig. 10.

Since the second terminal device 170 provided in this embodiment may execute the above-mentioned method for transmitting the resource indication information, the technical effects that can be obtained by the second terminal device may refer to the above-mentioned method embodiment, and will not be described herein.

Alternatively, the first terminal device in the embodiment of the present application may include a roadside unit, which may be used to implement the actions performed by the first terminal device in the above embodiment.

Alternatively, the second terminal device in the embodiment of the present application may include a roadside unit, which may be used to implement the actions performed by the second terminal device in the above embodiment.

Optionally, embodiments of the present application further provide a communication device (for example, the communication device may be a chip or a chip system), where the communication device includes a processor, and the method is used to implement any of the method embodiments described above. In one possible design, the communication device further includes a memory. The memory for storing the necessary program instructions and data, and the processor may invoke the program code stored in the memory to instruct the communication device to perform the method of any of the method embodiments described above. Of course, the memory may not be in the communication device. In another possible design, the communication device further includes an interface circuit, which is a code/data read/write interface circuit, for receiving computer instructions (the computer instructions being stored in a memory, possibly read directly from the memory, or possibly via other devices) and transmitting to the processor. When the communication device is a chip system, the communication device may be formed by a chip, or may include a chip and other discrete devices, which is not specifically limited in the embodiments of the present application.

Furthermore, the present application also provides a computer-readable storage medium, where computer instructions are stored, when the computer instructions run on a computer, to cause operations and/or flows performed by the first terminal device or the second terminal device in the method embodiments of the present application to be performed.

The present application also provides a computer program product comprising computer program code or instructions which, when run on a computer, cause operations and/or flows performed by the first terminal device or the second terminal device in the method embodiments of the present application to be performed.

In addition, the application also provides a communication system which comprises the first terminal equipment and the second terminal equipment.

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using a software program, it may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions described in accordance with embodiments of the present application are produced in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by a wired (e.g., coaxial cable, fiber optic, digital subscriber line (digital subscriber line, DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer readable storage medium may be any available medium that can be accessed by a computer or a data storage device including one or more servers, data centers, etc. that can be integrated with the medium. The usable medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a Solid State Disk (SSD)), or the like. In an embodiment of the present application, the computer may include the apparatus described above.

Although the present application has been described herein in connection with various embodiments, other variations to the disclosed embodiments can be understood and effected by those skilled in the art in practicing the claimed application, from a review of the figures, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other elements or steps, and the "a" or "an" does not exclude a plurality. A single processor or other unit may fulfill the functions of several items recited in the claims. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage.

Although the present application has been described in connection with specific features and embodiments thereof, it will be apparent that various modifications and combinations can be made without departing from the spirit and scope of the application. Accordingly, the specification and drawings are merely exemplary illustrations of the present application as defined in the appended claims and are considered to cover any and all modifications, variations, combinations, or equivalents that fall within the scope of the present application. It will be apparent to those skilled in the art that various modifications and variations can be made in the present application without departing from the spirit or scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims and the equivalents thereof, the present application is intended to cover such modifications and variations.

Claims

1. A method for transmitting resource indication information, comprising:

determining a first time unit in a first selection window;

and sending first information to a second terminal device in the first time unit, wherein the first information is used for assisting the second terminal device in resource selection, the first information indicates K candidate single time unit resources, K is a positive integer, the K candidate single time unit resources belong to Q time units in time domain, the Q time units belong to the first selection window, the smallest time unit in the Q time units is located in an Nth time unit after the first time unit, the absolute value of the difference value of any two adjacent time units in the Q time units is P time units, P is an integer greater than 1, and N is a positive integer.

2. The method of claim 1, wherein the smallest of the Q time units is Q ₁ The largest time unit T in the first selection window _end ，

Therein, Q, T _end P and Q ₁ Satisfy the following requirements

Represents a downward rounding, and Q is a positive integer.

3. The method according to claim 1 or 2, characterized in that the method further comprises:

Acquiring the first selection window information, wherein the first selection window information comprises at least 2 of a starting time unit of the first selection window, the length of the first selection window and an ending time unit of the first selection window;

and determining the first selection window according to the first selection window information.

4. A method according to claim 3, said obtaining said first selection window information comprising:

the first selection window information is received from the second terminal device.

5. The method according to any of claims 1-5, wherein the P is obtained from the second terminal, or the P is obtained from a network device, or the P is preconfigured.

6. The method according to any one of claims 1-5, further comprising:

and sending second information, wherein the second information comprises the P.

7. The method according to any of claims 1-6, wherein the first information is indicated by M bits, the M being determined by the Q time units, a first number of subchannels, and a total number of subchannels comprised by a first resource pool, the first number of subchannels being a number of subchannels occupied by each of the K candidate single-time unit resources.

8. The method of claim 7, wherein the M, the Q, the first number of subchannels, and the total number of subchannels included in the first resource pool satisfy the following formula:

wherein N is _subCH L is the total number of sub-channels included in the first resource pool _subCH,2 For the first number of sub-channels,

representing an upward rounding;

the first information is indicated by M bits, specifically:

the front of the M bits

A number of bits for indicating time domain information of the K candidate single time unit resources, a latter +_ of the M bits>

9. The method of claim 7, wherein the M, the Q, the first number of subchannels, and the total number of subchannels included in the first resource pool satisfy the following formula:

representing an upward rounding;

the first information is indicated by M bits, specifically:

the front of the M bits

A number of bits for indicating time domain information of the K candidate single time unit resources, a latter +_ of the M bits >

10. The method of claim 7, wherein the M, the Q, the first number of subchannels, and the total number of subchannels of the first resource pool satisfy a first formula as follows:

M＝Q*(N _subCH -L _subCH，2 +1)

the first information is indicated by M bits, including:

the M bits form a bit map, in whichEvery N _subCH -L _subCH，2 +1 bits indicate the availability of each candidate single time unit resource over one of the Q time units.

11. The method according to any of claims 1 to 10, wherein the N is configured, or preconfigured, or predefined, by a network device.

12. The method according to any of the claims 1 to 11, characterized in that the first information is carried in second stage side uplink control information SCI or medium access control layer control element MAC CE, or radio resource control RRC signaling.

13. A method for transmitting resource indication information, comprising:

Receiving first information from a first terminal device in the first time unit, wherein the first information is used for assisting a second terminal device in resource selection, the first information indicates K candidate single time unit resources, K is a positive integer, the K candidate single time unit resources belong to Q time units in a time domain, the Q time units belong to the first selection window, the smallest time unit in the Q time units is located in an Nth time unit after the first time unit, the absolute value of the difference value of any two adjacent time units in the Q time units is P time units, P is an integer greater than 1, and N is a positive integer greater than or equal to 1;

and determining a first time-frequency resource according to the first information.

14. The method of claim 13, wherein the step of determining the position of the probe is performed,

the smallest time unit in the Q time units is Q ₁ The largest time unit T in the first selection window _end ，

Therein, Q, T _end P and Q ₁ Satisfy the following requirements

Represents a downward rounding, and Q is a positive integer.

15. The method according to claim 13 or 14, wherein the P is obtained from the second terminal, or the P is obtained from a network device, or the P is preconfigured.

16. The method according to any one of claims 13-15, further comprising:

and sending second information, wherein the second information comprises the P.

17. The method according to any of claims 13-16, wherein the first information is indicated by M bits, the M being determined by the Q time units, a first number of subchannels, and a total number of subchannels comprised by a first resource pool, the first number of subchannels being a number of subchannels occupied by each of the K candidate single-time unit resources.

18. The method of claim 17, wherein the M, the Q time units, the first number of subchannels, and the total number of subchannels included in the first resource pool satisfy the following formula:

representing an upward rounding;

the first information is indicated by M bits, specifically:

the front of the M bits

19. The method of claim 17, wherein the M, the Q time units, the first number of subchannels, and the total number of subchannels included in the first resource pool satisfy the following formula:

representing an upward rounding;

the first information is indicated by M bits, specifically:

the front of the M bits

A bit for indicating the K candidate single timesFrequency domain information of inter-cell resources.

20. The method of claim 17, wherein the M, the Q, the first number of subchannels, and the total number of subchannels of the first resource pool satisfy a first formula:

M＝Q*(N _subCH -L _subCH，2 +1)

the first information is indicated by M bits, including:

21. The method according to any of claims 13 to 20, wherein the N is configured, or preconfigured, or predefined, by a network device.

22. The method according to any of the claims 13 to 21, characterized in that the first information is carried in second stage side uplink control information SCI or medium access control layer control element MAC CE, or radio resource control RRC signaling.

23. A communication device, comprising: a processing module and a receiving-transmitting module;

the processing module is used for determining a first time unit in a first selection window;

the transceiver module is configured to send first information to a second terminal device in the first time unit, where the first information is used to assist the second terminal device in selecting resources, the first information indicates K candidate single time unit resources, where K is a positive integer, the K candidate single time unit resources belong to Q time units in a time domain, the Q time units belong to the first selection window, a smallest time unit in the Q time units is located in an nth time unit after the first time unit, an absolute value of a difference value between any two adjacent time units in the Q time units is P time units, P is an integer greater than 1, and N is a positive integer.

24. The apparatus of claim 23, wherein a smallest of the Q time units is Q ₁ The largest time unit T in the first selection window _end ，

Therein, Q, T _end P and Q ₁ Satisfy the following requirements

Represents a downward rounding, and Q is a positive integer.

25. The apparatus of claim 23 or 24, wherein the device comprises a plurality of sensors,

the transceiver module is further configured to obtain the first selection window information, where the first selection window information includes at least 2 of a start time unit of the first selection window, a length of the first selection window, and an end time unit of the first selection window;

the processing module determines the first selection window according to the first selection window information.

26. The apparatus according to claim 25, wherein the transceiver unit is specifically configured to receive the first selection window information from the second terminal device.

27. The apparatus according to any of claims 23-26, wherein the P is obtained from the second terminal, or the P is obtained from a network device, or the P is preconfigured.

28. The apparatus of any of claims 23-27, wherein the transceiver module is further configured to transmit second information, the second information comprising the P.

29. The apparatus according to any of claims 23-28, wherein the first information is indicated by M bits, the M being determined by the Q time units, a first number of subchannels, and a total number of subchannels included in a first resource pool, the first number of subchannels being a number of subchannels occupied by each of the K candidate single-time unit resources.

30. The apparatus of claim 29, wherein the M, the Q time units, the first number of subchannels, and the total number of subchannels included in the first resource pool satisfy the following formula:

representing an upward rounding;

the first information is indicated by M bits, specifically:

the front of the M bits

31. The apparatus of claim 29, wherein the M, the Q time units, the first number of subchannels, and the total number of subchannels included in the first resource pool satisfy the following formula:

representing an upward rounding;

the first information is indicated by M bits, specifically:

the front of the M bits

32. The apparatus of claim 29, wherein the M, the Q, the first number of subchannels, and the total number of subchannels of the first resource pool satisfy a first formula as follows:

M＝Q*(N _subCH -L _subCH，2 +1)

the first information is indicated by M bits, including:

33. The apparatus of any one of claims 23-32, wherein the N is configured or preconfigured by a network device.

34. The apparatus according to any of claims 23-33, characterized in that the first information is carried in second stage side uplink control information SCI or medium access control layer control element MAC CE, or radio resource control RRC signaling.

35. A communication device, comprising: a processing module and a receiving-transmitting module;

the transceiver module is configured to receive, at the first time unit, first information from a first terminal device, where the first information is used to assist a second terminal device in selecting resources, where K candidate single time unit resources are positive integers, the K candidate single time unit resources belong to Q time units in a time domain, the Q time units belong to the first selection window, a smallest time unit in the Q time units is located in an nth time unit after the first time unit, an absolute value of a difference value between any two adjacent time units in the Q time units is P time units, and P is an integer N greater than 1 and is a positive integer;

the processing module is configured to determine a first time-frequency resource according to the first information.

36. The apparatus of claim 35, wherein a smallest of the Q time units is Q ₁ The largest time unit T in the first selection window _end ，

Therein, Q, T _end P and Q ₁ Satisfy the following requirements

Represents a downward rounding, and Q is a positive integer.

37. The apparatus of claim 35 or 36, wherein the N is configured or preconfigured by a network device.

38. The apparatus according to any of claims 35-37, wherein the first information is indicated by M bits, the M being determined by the Q time units, a first number of subchannels, and a total number of subchannels comprised by a first resource pool, the first number of subchannels being a number of subchannels occupied by each of the K candidate single-time unit resources.

39. The apparatus of claim 38, wherein the M, the Q time units, the first number of subchannels, and the total number of subchannels included in the first resource pool satisfy the following formula:

representing an upward rounding;

the first information is indicated by M bits, specifically:

the front of the M bits

40. The apparatus of claim 38, wherein the M, the Q time units, the first number of subchannels, and the total number of subchannels included in the first resource pool satisfy the following formula:

representing an upward rounding;

the first information is indicated by M bits, specifically:

the front of the M bits

41. The apparatus of claim 38, wherein the M, the Q, the first number of subchannels, and the total number of subchannels of the first resource pool satisfy a first formula as follows:

M＝Q*(N _subCH -L _subCH，2 +1)

the first information is indicated by M bits, including:

42. The apparatus according to any of claims 35-41, wherein the P is obtained from the second terminal, or the P is obtained from a network device, or the P is preconfigured.

43. The apparatus of any one of claims 35-42, wherein the transceiver module is further configured to receive second information, the second information comprising the P.

44. The apparatus according to any of claims 35-43, wherein the first information is carried in second stage side uplink control information SCI or medium access control layer control element MAC CE, or radio resource control RRC signaling.

45. A communication device comprising at least one processor and at least one memory, the at least one memory to store a computer program or instructions, the at least one processor to execute the computer program or instructions in memory, to cause the method of any one of claims 1 to 12 to be performed or to cause the method of any one of claims 13 to 22 to be performed.

46. A computer readable storage medium having stored therein computer instructions which, when run on a computer, perform the method of any one of claims 1 to 12 or the method of any one of claims 13 to 22.

47. A computer program product comprising computer program code means for performing the method of any of claims 1 to 12 or the method of any of claims 13 to 22 when said computer program code means is run on a computer.

48. A chip comprising a processor for executing a computer program stored in a memory, such that the method of any one of claims 1 to 12 is performed or such that the method of any one of claims 13 to 22 is performed.