CN115835381A - Communication method and apparatus, computer-readable storage medium, and computer program product - Google Patents

Abstract

The present application provides a communication method and device, a computer-readable storage medium, and a computer program product. The method includes: a first terminal device receives multiple different TBs through multiple PSSCHs, and sends HARQ data corresponding to multiple different TBs on PSFCH resources. information. Wherein, the PSFCH resource includes at least one PRB in the frequency domain. Through the above process, the HARQ information corresponding to multiple TBs (that is, multiple PSSCHs) is multiplexed into one PSFCH, which meets the requirements of the HARQ information multiplexing scenario and improves the resource utilization rate of the HARQ information.

Description

Communication method and device, computer readable storage medium and computer program product

technical field

The present application relates to the technical field of communication, and in particular to a communication method and device, a computer-readable storage medium, and a computer program product.

Background technique

In a vehicle to everything (V2X) technology, terminal devices may communicate with each other through a side link (sidelink, SL).

In a new air interface (new radio, NR) V2X scenario, side link communication supports hybrid automatic repeat request (hybrid automatic repeat request, HARQ) feedback. Specifically, the sending end sends data to the receiving end through a physical sidelink shared channel (PSSCH), and the receiving end feeds back HARQ information to the sending end through a physical sidelink feedback channel (PSFCH) (For example, the HARQ information may be an acknowledgment (acknowledgment, ACK) or a negative acknowledgment (NACK), ACK indicates successful reception, and NACK indicates unsuccessful reception), so that the sender can know the data reception situation.

How to improve resource utilization for feeding back HARQ information is an urgent technical problem to be solved.

Contents of the invention

The present application provides a communication method and device, a computer-readable storage medium, and a computer program product, which are used to improve the resource utilization rate of feeding back HARQ information.

In a first aspect, the present application provides a communication method, including:

The first terminal device receives multiple different TBs through multiple PSSCHs;

The first terminal device sends the HARQ information corresponding to the multiple different TBs on PSFCH resources, where the PSFCH resources include at least one PRB in the frequency domain.

In a possible implementation manner, the first terminal device sends the HARQ information corresponding to the multiple different TBs on the PSFCH resource, including:

The first terminal device sends a coding result on the PSFCH resource, where the coding result is a result obtained by coding the HARQ information corresponding to the multiple TBs.

In a possible implementation manner, the PSFCH resources include time domain resources and frequency domain resources, and before the first terminal device sends the HARQ information corresponding to the multiple different TBs on the PSFCH resources, the method further includes :

The first terminal device determines the time domain resource of the PSFCH resource according to the time domain indication information;

The first terminal device determines the frequency-domain resource of the PSFCH resource according to the frequency-domain indication information or the time-frequency resource occupied by the PSSCH transmitting at least one of the multiple TBs.

In a possible implementation manner, the time domain indication information is used to indicate the time interval between the PSSCH for transmitting each TB and the PSFCH for transmitting its corresponding HARQ information;

The first terminal device determines the time domain resource of the PSFCH resource according to the time domain indication information, including:

The first terminal device determines the time domain resource of the PSFCH resource according to the receiving moment of the first PSSCH and the time interval between the first PSSCH and the PSFCH corresponding to the first PSSCH, and the first PSSCH uses for transmitting one or more TBs of the plurality of TBs.

In a possible implementation manner, the time domain indication information is used to indicate the period of the PSFCH; the first terminal device determines the time domain resource of the PSFCH resource according to the time domain indication information, including:

The first terminal device determines the time domain resource of the PSFCH resource according to the period of the PSFCH.

In a possible implementation manner, the time domain indication information is used to indicate the HARQ information feedback cycle; the first terminal device determines the time domain resource of the PSFCH resource according to the time domain indication information, including:

The first terminal device determines the time domain position of the PSFCH resource according to the HARQ information feedback cycle; wherein, the HARQ information feedback cycle is K times the PSFCH cycle, and K is an integer greater than or equal to 1 .

In a possible implementation manner, the frequency domain indication information includes: an index of the at least one PRB;

The first terminal device determines the frequency domain resource of the PSFCH resource according to the frequency domain indication information, including:

The first terminal device determines frequency domain resources of the PSFCH resources according to the index of the at least one PRB.

In a possible implementation manner, the first terminal device determines the frequency domain resource of the PSFCH resource according to the time-frequency resource occupied by the PSSCH for transmitting at least one TB among the multiple TBs, including:

The first terminal device acquires a PSFCH resource set, where the PSFCH resource set includes multiple PRBs;

The first terminal device determines n PRBs from the PSFCH resource pool according to the first number n and the time-frequency resources occupied by the PSSCH for transmitting the first TB, where n is an integer greater than or equal to 1, and the n There is a preset mapping relationship between a PRB and the time-frequency resource occupied by the PSSCH for transmitting the first TB, where the first TB is any one of the multiple TBs;

The first terminal device determines the n PRBs as frequency domain resources of the PSFCH resources.

In a possible implementation manner, the first number n is carried in sidelink control information SCI or radio resource control RRC signaling.

In a possible implementation manner, the time domain indication information is carried in SCI or RRC signaling, and/or the frequency domain indication information is carried in SCI or RRC signaling.

In a second aspect, the present application provides a communication device, and the communication device includes:

A receiving module, configured to receive a plurality of different transport blocks TB through a plurality of physical sidelink shared channels PSSCH;

The sending module is configured to send hybrid automatic repeat request HARQ information corresponding to the multiple different TBs on a physical sidelink feedback channel PSFCH resource, where the PSFCH resource includes at least one physical resource block PRB in the frequency domain.

In a possible implementation manner, the sending module is specifically configured to:

Send a coding result on the PSFCH resource, where the coding result is a result obtained by coding the HARQ information corresponding to the multiple TBs.

In a possible implementation manner, the PSFCH resources include time domain resources and frequency domain resources, and the communication device further includes a determination module, the determination module is configured to:

Determine the time domain resource of the PSFCH resource according to the time domain indication information;

The frequency domain resource of the PSFCH resource is determined according to the frequency domain indication information or the time frequency resource occupied by the PSSCH transmitting at least one TB among the plurality of TBs.

In a possible implementation manner, the time domain indication information is used to indicate the time interval between the PSSCH for transmitting each TB and the PSFCH for transmitting its corresponding HARQ information; the determining module is specifically used for:

According to the receiving moment of the first PSSCH and the time interval between the first PSSCH and the PSFCH corresponding to the first PSSCH, determine the time domain resource of the PSFCH resource, the first PSSCH is used to transmit the multiple One or more TBs in TB.

In a possible implementation manner, the time domain indication information is used to indicate the period of the PSFCH; the determining module is specifically configured to:

Determine the time domain resource of the PSFCH resource according to the period of the PSFCH.

In a possible implementation manner, the time domain indication information is used to indicate the HARQ information feedback cycle; the determining module is specifically used for:

Determine the time-domain position of the PSFCH resource according to the HARQ information feedback cycle; wherein, the HARQ information feedback cycle is K times the PSFCH cycle, and K is an integer greater than or equal to 1.

In a possible implementation manner, the frequency domain indication information includes: an index of the at least one PRB; the determining module is specifically configured to:

Determine the frequency domain resource of the PSFCH resource according to the index of the at least one PRB.

In a possible implementation manner, the determining module is specifically configured to:

Acquire a PSFCH resource set, where the PSFCH resource set includes multiple PRBs;

According to the first number n and the time-frequency resources occupied by the PSSCH for transmitting the first TB, determine n PRBs from the PSFCH resource pool, where n is an integer greater than or equal to 1, and the n PRBs are related to the transmission of the There is a preset mapping relationship between the time-frequency resources occupied by the PSSCH of the first TB, and the first TB is any one of the multiple TBs;

The frequency domain positions corresponding to the n PRBs are used to determine the frequency domain positions of the target resources.

In a possible implementation manner, the first number n is carried in sidelink control information SCI or radio resource control RRC signaling.

In a possible implementation manner, the time domain indication information is carried in SCI or RRC signaling, and/or the frequency domain indication information is carried in SCI or RRC signaling.

In a third aspect, the present application provides a communication device, including: a processor, and a memory communicatively connected to the processor;

the memory stores computer-executable instructions;

The processor executes the computer-executed instructions stored in the memory, so as to implement the method provided in any possible implementation manner of the first aspect.

In a fourth aspect, the present application provides a computer-readable storage medium, where a computer program is stored in the computer-readable storage medium, and when the computer program is executed by a computer, any possible implementation of the first aspect provides method is executed.

In a fifth aspect, the present application provides a computer program product, including a computer program. When the computer program is executed by a computer, the method provided in any possible implementation manner of the first aspect is executed.

According to the communication method and device, computer-readable storage medium and computer program product provided by the present application, the first terminal device can transmit HARQ information corresponding to multiple different TBs on one PSFCH, realizing the multiplexing of HARQ information corresponding to multiple TBs into one The PSFCH meets the requirements of the HARQ information multiplexing scenario, and improves the resource utilization rate of the feedback HARQ information.

Description of drawings

FIG. 1 is a schematic diagram of an application scenario provided by an embodiment of the present application;

FIG. 2 is a schematic diagram of another application scenario provided by the embodiment of the present application;

FIG. 3 is a schematic diagram of another application scenario provided by the embodiment of the present application;

FIG. 4 is a schematic diagram of a resource mapping relationship between a PSSCH subchannel and a PSFCH according to an embodiment of the present application;

FIG. 5A is a schematic diagram of a method of determining PSFCH candidate PRBs provided by an embodiment of the present application;

FIG. 5B is a schematic diagram of another method for determining PSFCH candidate PRBs provided in the embodiment of the present application;

FIG. 6A is a schematic flowchart of a communication method provided in an embodiment of the present application;

FIG. 6B is a schematic diagram of an interaction process of a communication method provided in an embodiment of the present application;

FIG. 7 is a schematic diagram of a time-domain resource for determining PSFCH resources provided by an embodiment of the present application;

FIG. 8 is a schematic diagram of frequency domain resources for determining PSFCH resources provided by an embodiment of the present application;

FIG. 9 is a schematic structural diagram of a communication device provided by an embodiment of the present application;

FIG. 10 is a schematic structural diagram of another communication device provided by an embodiment of the present application.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

The terms "first", "second", "third", "fourth", etc. in this application, if any, are used to distinguish similar objects, and are not used to describe a specific order or sequence. The execution order of each step in the method provided in the present application is only an example, and there may be other orders in actual implementation, which is not limited in the present application. Furthermore, the terms "comprising" and "having", as well as any variations thereof, are intended to cover a non-exclusive inclusion, for example, a process, method, system, product or device comprising a sequence of steps or elements is not necessarily limited to the expressly listed instead, may include other steps or elements not explicitly listed or inherent to the process, method, product or apparatus.

Before introducing the technical solutions provided by the embodiments of the present application, the possible application scenarios of the embodiments of the present application will be described first.

Exemplarily, FIG. 1 is a schematic diagram of an application scenario provided by an embodiment of the present application. The communication system shown in FIG. 1 includes a network device 101 and two terminal devices (terminal device 102 and terminal device 103 respectively), both of which are within the coverage of the network device 101 . The network device 101 can communicate with the terminal device 102 and the terminal device 103 respectively. The terminal device 102 can communicate with the terminal device 103 . Exemplarily, the terminal device 102 may send a message to the terminal device 103 through the network device 101 , and the terminal device 102 may also directly send a message to the terminal device 103 . Wherein, the link directly communicating between the terminal device 102 and the terminal device 103 is called a side link, and may also be called a device-to-device (device-to-device, D2D) link, a side link, and the like. Transmission resources on the side link may be allocated by network devices.

Exemplarily, FIG. 2 is a schematic diagram of another application scenario provided by the embodiment of the present application. The communication system shown in FIG. 2 also includes a network device 101 and two terminal devices. The difference from FIG. 1 is that the terminal device 103 is within the coverage of the network device 101, and the terminal device 104 is outside the coverage of the network device 101. . The network device 101 can communicate with the terminal device 103 , and the terminal device 103 can communicate with the terminal device 104 . Exemplarily, the terminal device 103 may receive configuration information sent by the network device 101, and perform sidelink communication according to the configuration information. Since the terminal device 104 cannot receive the configuration information sent by the network device 101, the terminal device 104 may, according to the pre-configuration (pre-configuration) information and the information carried in the sidelink broadcast channel (physical sidelink broadcast channel, PSBCH) sent by the terminal device 103, For side communication.

Exemplarily, FIG. 3 is a schematic diagram of another application scenario provided by the embodiment of the present application. Both the terminal device 104 and the terminal device 105 shown in FIG. 3 are outside the coverage of the network device 101 . Both the terminal device 104 and the terminal device 105 can determine the sidelink configuration according to the pre-configuration information, and perform sidelink communication.

The terminal equipment involved in this embodiment of the present application can also be referred to as a terminal, which can be a device with a wireless transceiver function, which can be deployed on land, including indoor or outdoor, handheld or vehicle-mounted; it can also be deployed on water (such as Ships, etc.); can also be deployed in the air (such as aircraft, balloons and satellites, etc.). The terminal device may be user equipment (user equipment, UE), where the UE includes a handheld device, a vehicle-mounted device, a wearable device, or a computing device with a wireless communication function. Exemplarily, the UE may be a mobile phone (mobile phone), a tablet computer or a computer with a wireless transceiver function. The terminal device can also be a virtual reality (virtual reality, VR) terminal device, an augmented reality (augmented reality, AR) terminal device, a wireless terminal in industrial control, a wireless terminal in unmanned driving, a wireless terminal in telemedicine, a smart grid Wireless terminals in smart cities, wireless terminals in smart cities, wireless terminals in smart homes, etc. In the embodiment of the present application, the devices used to realize the functions of terminal devices can be regarded as terminal devices; the terminal devices can also be devices that can support the terminal devices to realize the functions, such as chip systems, and the devices can be installed in the terminal devices . In the embodiment of the present application, the system-on-a-chip may be composed of chips, or may include chips and other discrete devices.

The network device involved in the embodiment of the present application includes a base station (base station, BS), which may be a device deployed in a radio access network and capable of performing wireless communication with a terminal device. Among them, the base station may have various forms, such as a macro base station, a micro base station, a relay station, and an access point. Exemplarily, the base station involved in the embodiment of the present application may be a base station in fifth generation mobile communications (5th generation mobile networks, 5G) or a base station in LTE, where the base station in 5G may also be called a sending and receiving point ( transmission reception point, TRP) or gNB. In the embodiments of the present application, the devices for realizing the functions of the network devices can be regarded as network devices; they can also be devices capable of supporting the network devices to realize the functions, such as chip systems, and the devices can be installed in the network devices.

It should be noted that the system architecture and application scenarios described in the embodiments of the present application are for the purpose of more clearly illustrating the technical solutions of the embodiments of the present application, and do not constitute limitations on the technical solutions provided by the embodiments of the present application. It can be seen that with the evolution of the network architecture and the emergence of new service scenarios, the technical solutions provided by the embodiments of the present application are also applicable to similar problems.

NR-V2X is a communication scenario based on sidelink links. In NR-V2X communication, X can generally refer to any device with wireless receiving and transmitting capabilities, including but not limited to slow-moving wireless devices, fast Mobile on-board equipment, roadside infrastructure, network control nodes with wireless transmission and reception capabilities, etc. The technical solutions provided in this application can be applied to NR-V2X communication scenarios, and can also be applied to other scenarios based on sidelink-based communication. NR-V2X communication supports unicast, multicast, and broadcast transmission methods. For unicast transmission, the sending terminal sends data, and there is only one receiving terminal. For multicast transmission, the sending terminal sends data, and the receiving terminal is all terminals in a communication group, or all terminals within a certain transmission distance. For broadcast transmission, the sending terminal sends data, and the receiving terminal is any terminal around the sending terminal.

There is a resource pool (resource pool, RP) configuration in NR-V2X, and the resource pool limits the time-frequency resource range of sidelink communication. The minimum time-domain granularity of the resource pool configuration is one slot, and the resource pool can contain discontinuous time slots in time; the minimum frequency-domain granularity is one subchannel, and a subchannel includes multiple continuous channels in the frequency domain. A physical resource block (physical resource block, PRB), in NR-V2X, a subchannel may include 10, 12, 15, 20, 25, 50, 75 or 100 PRBs.

In NR-V2X communication, the second-order sidelink control information (sidelink control information, SCI) is introduced. The first-order SCI (or called the first sidelink control information) is carried in the physical sidelink control channel (physical sidelink control channel, PSCCH), and is used to indicate the transmission resource, reserved resource information, modulation and coding strategy (modulation and coding scheme, MCS) level, priority and other information. The second-order SCI (or called the second sideline control information) is carried in the PSSCH, and is used to indicate source ID, destination ID, hybrid automatic repeat transmission HARQ ID, new data indicator (newdata indicator, NDI), etc. for data resolution tuned information.

In the current agreement, the second-order SCI includes two formats, SCI format 2-A and SCI format2-B. Among them, the content in SCI format 2-A is shown in Table 1, and the content in SCI format 2-B is shown in Table 2.

Table 1

Wherein, the source identification code field is used to indicate the source identification code, the target identification code field is used to indicate the target identification code, and the transmission type indication includes: unicast (unicast), groupcast (groupcast) and broadcast (Broadcast).

Table 2

Wherein, the area identification code field is used to indicate the area identification code.

The terminal device decodes the first-stage SCI from the PSCCH, and determines the format of the second-stage SCI according to the information in the second-stage SCI format (2nd-stage SCI format) field in the first-stage SCI. Furthermore, according to the format of the second-order SCI, the second-order SCI carried in the PSSCH is decoded.

Table 3 shows the contents of the second-stage SCI format (2nd-stage SCI format) field in the first-stage SCI.

table 3

In order to improve the reliability of communication, PSFCH is introduced in NR-V2X. The sending terminal sends sideline data to the receiving terminal, including PSCCH and PSSCH, and the receiving terminal sends hybrid automatic repeat request (HARQ) information to the sending terminal, and the sending terminal judges whether data retransmission is required based on the HARQ information fed back by the receiving terminal. pass. Wherein, the HARQ information is carried in the PSFCH. For example, the HARQ information may be ACK or NACK, ACK indicates successful reception, and NACK indicates unsuccessful reception.

PSFCH appears periodically in the time domain. The period size of the PSFCH is configured by a radio resource control (radioresource control, RRC) parameter. Exemplarily, the period of the PSFCH may be 1, 2, 4, etc., and the unit is a slot (slot).

The resource pool configuration information of the sidelink includes: transmission resources of the PSCCH/PSSCH and transmission resources of the PSFCH. The sending terminal sends the PSCCH/PSSCH in the sending resource pool configured for it. The receiving terminal detects whether there is a PSCCH/PSSCH sent by other terminals in the receiving resource pool configured for it. If detected, the receiving terminal determines the transmission resource for sending PSFCH according to the transmission resource of PSCCH/PSSCH and the configuration information of PSFCH in the receiving resource pool . After sending the PSCCH/PSSCH, the sending terminal will determine resources for receiving the PSFCH according to the PSFCH configuration information in the sending resource pool, and perform PSFCH detection. In order to allow the sending terminal and the receiving terminal to perform data transmission normally, the sending resource pool configured for the sending terminal is generally the same as the receiving resource pool configured for the receiving terminal, so that the sending terminal and the receiving terminal transmit resources according to the PSSCH and the resources in their respective resource pools The configuration information of PSFCH can determine the same PSFCH transmission resource.

In the current protocol, the receiving terminal determines the transmission resources used to send the PSFCH in the following manner:

(1) Obtain the available PRB set (PRB set) of PSFCH in the resource pool

Exemplarily, the configuration information (sl-PSFCH-RB-Set) sent by the network device may be received, and the configuration information indicates which PRBs in the frequency domain in the resource pool can be used for PSFCH transmission.

(2) Obtain a PSFCH usable PRB subset (PRB subset) associated with each subchannel on each time slot within a PSFCH period.

Exemplarily, the PSFCH available PRB subsets associated with each subchannel on each time slot are as follows:

表示sl-PSFCH-RB-Set指示的PSFCH可用PRB总数，

表示PSFCH所关联的PSSCH的时隙数，N_subch表示每个时隙的子信道数；

表示PSFCH可用PRB可以划分的子集总数。经过上述公式(2)计算得到的

表示每个PRB子集中包括的PRB数量(即每个时隙上的每个子信道关联的PSFCH可用PRB的数量)。Among them, in the above formula (2),

Indicates the total number of available PRBs for PSFCH indicated by sl-PSFCH-RB-Set,

Indicates the number of time slots of the PSSCH associated with the PSFCH, and N _subch indicates the number of sub-channels of each time slot;

Indicates the total number of subsets that the available PRBs of the PSFCH can be divided into. Calculated by the above formula (2)

Indicates the number of PRBs included in each PRB subset (that is, the number of available PRBs for the PSFCH associated with each subchannel on each time slot).

0≤j＜N_subch。The above formula (1) represents the available PRB subset associated with the jth subchannel in the ith time slot in a PSFCH cycle.

0≤j<N _subch .

FIG. 4 is a schematic diagram of a resource mapping relationship between subchannels of a PSSCH and a PSFCH provided by an embodiment of the present application. As shown in Figure 4, it is assumed that the period of the PSFCH is 2 time slots. There are PRB resources available for PSFCH in slot n+1 and slot n+3. There is a mapping relationship between each subchannel in slot n and the PSFCH available PRB resources in slot n+1. For example, FIG. 4 illustrates that the subchannel s in time slot n is mapped to the k to k+1 PRBs in the PSFCH available PRB set in time slot n+1 (that is, the k to k+1 PRBs are PSFCH available PRBs associated with subchannel s of slot n). There is a mapping relationship between each subchannel in slot n+1 and the PSFCH available PRB resources in slot n+1, and each subchannel in slot n+2 and the PSFCH available PRB resources in slot n+3 There is a mapping relationship between each sub-channel in slot n+3 and the PSFCH available PRB resources in slot n+3, which will not be illustrated here one by one.

(3) According to the time-frequency resource occupied by the received PSSCH, determine the total number of candidate PRBs and cyclic shift pairs (cyclic shift pairs) for sending the PSFCH.

Exemplarily, the following formula (3.1) can be used to determine the total number of candidate PRBs and cyclic shift pairs (cyclic shift pairs) used to send PSFCH

取值为1或

为一个PSSCH所占的子信道总数。In the above formula (3.1),

Takes a value of 1 or

is the total number of subchannels occupied by one PSSCH.

取值为1时，说明将PSSCH所占的其中一个子信道关联的PSFCH可用PRB子集作为候选PRB。图5A为本申请实施例提供的一种确定PSFCH候选PRB的方式示意图，如图5A所示，假设终端设备接收到的PSSCH占了4个子信道，分别为子信道1至子信道4，可以将子信道1关联的PSFCH可用PRB子集作为候选PRB。其中，子信道1关联的PSFCH可用PRB子集可以通过上述公式(1)得到。when

When the value is 1, it indicates that the PSFCH associated with one of the subchannels occupied by the PSSCH can be used as a candidate PRB. FIG. 5A is a schematic diagram of a method for determining PSFCH candidate PRBs provided by the embodiment of the present application. As shown in FIG. 5A , assuming that the PSSCH received by the terminal device occupies 4 subchannels, which are respectively subchannel 1 to subchannel 4, the The PSFCH associated with subchannel 1 can use a subset of PRBs as candidate PRBs. Wherein, the PSFCH available PRB subset associated with sub-channel 1 can be obtained by the above formula (1).

取值为

时，说明将PSSCH所占的所有子信道关联的PSFCH可用PRB子集均作为候选PRB。图5B为本申请实施例提供的另一种确定PSFCH候选PRB的方式示意图，如图5B所示，假设终端设备接收到的PSSCH占了4个子信道，分别为子信道1至子信道4，可以将子信道1关联的PSFCH可用PRB子集、子信道2关联的PSFCH可用PRB子集、子信道3关联的PSFCH可用PRB子集、子信道4关联的PSFCH可用PRB子集均作为候选PRB。其中，每个子信道关联的PSFCH可用PRB子集可以通过上述公式(1)得到。when

The value is

, it indicates that the PSFCH available PRB subsets associated with all subchannels occupied by the PSSCH are used as candidate PRBs. FIG. 5B is a schematic diagram of another method of determining PSFCH candidate PRBs provided by the embodiment of the present application. As shown in FIG. 5B, it is assumed that the PSSCH received by the terminal device occupies 4 subchannels, which are respectively subchannel 1 to subchannel 4. The available PSFCH PRB subset associated with subchannel 1, the available PSFCH PRB subset associated with subchannel 2, the available PSFCH PRB subset associated with subchannel 3, and the available PSFCH PRB subset associated with subchannel 4 are all used as candidate PRBs. Wherein, the PSFCH available PRB subset associated with each subchannel can be obtained by the above formula (1).

表示支持的循环移位对总数。

的取值可以参见表4所示。In the above formula (3.1),

Indicates the total number of rotatable pairs supported.

The values of can be seen in Table 4.

Table 4

(4) Determine the target PRB finally used to carry the HARQ information and the index of the cyclic shift pair from the candidate PRBs.

Exemplarily, the following formula (4) can be used to determine the target PRB and the cyclic shift pair index:

Wherein, the P _ID represents the identification of the sending terminal, and when the lateral communication is multicast type 1, the M _ID represents the group identification of the group where the sending terminal and the receiving terminal belong. M _ID =0 when the side communication is unicast and multicast type 2. Wherein, the multicast type 1 means that the receiving terminal only supports feedback of NACK, and the multicast type 2 means that the receiving terminal can feed back both NACK and ACK. The identifier and group identifier of the terminal device may be allocated when the terminal device establishes a connection with the network device, or may be allocated when a side connection is established between the terminal device and the terminal device. The index of a PRB available for the PSFCH can be uniquely determined through the above formula (4), and the PRB is the target PRB. The index of the cyclic shift pair can also be determined through the above formula (4). According to the determined index of the cyclic shift pair and Table 1, the parameter m ₀ for generating the sequence bearing the HACQ information can be determined.

(5) Determine the sequence parameter mcs carrying the HRAQ information.

The terminal device determines the sequence parameter mcs carrying the HRAQ information according to the decoding situation of the PSSCH. For example, as shown in Table 5, in unicast and multicast type 2 scenarios, if the PSSCH is successfully decoded, ACK should be fed back, and the ACK information is carried by the sequence. At this time, the value of the parameter mcs for generating the sequence is 6; If the decoding of the PSSCH fails, NACK should be fed back, and the NACK information is carried by the sequence. At this time, the value of the parameter mcs for generating the sequence is 0. For another example, as shown in Table 6, in the multicast type 1 scenario, if the decoding of the PSSCH fails, NACK should be fed back, and the NACK information is carried by the sequence. At this time, the value of the parameter mcs of the generated sequence is 0. If successful, no HARQ information is fed back.

table 5

HARQ information (HARQ-ACK Value) 0 (NACK) 1(ACK) Sequence cyclic shift 0 6

Table 6

HARQ information (HARQ-ACK Value) 0 (NACK) 1(ACK) Sequence cyclic shift 0 N/A

Further, a sequence bearing HARQ information is generated by using the determined sequence parameters m0 and mcs, and sent in the target PRB.

Through the above steps (1) to (5), it can be seen that the current PSFCH resource determination method can determine the only available PSFCH PRB for a PSSCH, and determine the sequence parameters for carrying HARQ information, and finally carry 1 bit in the determined target PRB HARQ information. In this way, one PSFCH can only feed back the HARQ information corresponding to one PSSCH, which cannot be applied to the scenario of multiplexing the HARQ information of multiple PSSCHs. In the embodiment of the present application, the multiplexing of HARQ information of multiple PSSCHs means that the HARQ information of multiple PSSCHs is carried on the same PSFCH.

In order to solve the above technical problems, in the embodiment of the present application, by redesigning the PSFCH resource determination method, one or more PRBs can be determined when determining PSFCH resources, and the HARQ information of multiple PSSCHs can be on the same PSFCH To meet the requirement of multiplexing HARQ information of multiple PSSCHs.

The technical solution of the present application will be described in detail below with specific embodiments. The following specific embodiments may be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments.

FIG. 6A is a schematic flowchart of a communication method provided by an embodiment of the present application. As shown in Figure 6A, the method of this embodiment includes:

S601: The first terminal device receives multiple different TBs through multiple PSSCHs.

Wherein, each TB corresponds to a PSSCH. The data carried in each TB is side data sent by the second terminal device to the first terminal device.

Optionally, the above multiple TBs are received within one PSFCH period.

For example, it is assumed that one PSFCH period is 4 time slots, and time slot 1, time slot 2, time slot 3, and time slot 4 are one PSFCH period. Then, the first terminal device can receive TB1 through the PSSCH of time slot 1, receive TB2 through the PSSCH of time slot 2, receive TB3 through the PSSCH of time slot 3, and receive TB4 through the PSSCH of time slot 4. Of course, the first terminal device can also receive TB in some of the above four time slots, for example, receive TB1 through the PSSCH of time slot 1, receive TB2 through the PSSCH of time slot 3, and receive TB2 through the PSSCH of time slot 2 and time slot 1. Slot 4 has no TBs to receive.

In the embodiment of the present application, the foregoing multiple TBs may come from the same second terminal device, or may come from multiple different second terminal devices. This embodiment does not limit it.

S602: The first terminal device sends HARQ information corresponding to multiple different TBs on PSFCH resources, where the PSFCH resources include at least one PRB in the frequency domain.

The embodiment of the present application is different from the determination method of the above-mentioned existing PSFCH resource. In the embodiment of the present application, the PSFCH resource includes one or more PRBs in the frequency domain, instead of determining only one PRB. Since the PSFCH resource may include multiple PRBs, more HARQ information can be carried by the PSFCH resource, thereby meeting the requirement of multiplexing the HARQ information of multiple PSSCHs.

In a possible implementation manner, the first terminal device sends an encoding result on the PSFCH resource, and the encoding result is a result obtained by encoding HARQ information corresponding to multiple TBs.

Another difference between the embodiment of the present application and the aforementioned prior art is that, when the embodiment of the present application carries HARQ information in the PSFCH resource, the form of a cyclic shift sequence is no longer used. Because, in the form of a cyclic shift sequence, only 1-bit information can be carried in one PSFCH PRB. In the embodiment of the present application, the HARQ information corresponding to multiple TBs is encoded, and the encoding result is carried on the PSFCH resource for transmission. In this way, it is equivalent to canceling the restriction that one PSFCH PRB can only carry 1-bit information, so that more information can be carried on PSFCH resources.

FIG. 6B is a schematic diagram of an interaction process of a communication method provided by an embodiment of the present application. As shown in Figure 6B, the method of this embodiment includes:

S611: The second terminal device sends multiple different TBs to the first terminal device through multiple PSSCHs.

Correspondingly, the first terminal device receives multiple different TBs through multiple PSSCHs.

S612: The first terminal device determines the time-domain resource of the PSFCH resource according to the time-domain indication information, and determines the frequency domain of the PSFCH resource according to the frequency-domain indication information or the time-frequency resource occupied by the PSSCH that transmits at least one TB among the multiple TBs Resources: PSFCH resources include at least one PRB in the frequency domain.

S613: The first terminal device sends HARQ information corresponding to multiple different TBs to the second terminal device on the PSFCH resource.

It should be understood that the implementation manners of S611 and S613 in this embodiment are similar to those in the embodiment shown in FIG. 6A , and repeated content will not be repeated here. The methods for determining the time-domain resource and the frequency-domain resource of the PSFCH resource in S612 are respectively introduced below.

In the embodiment of the present application, when the first terminal device determines the time domain resource of the PSFCH resource, it may adopt the following possible solutions.

Time domain resource determination scheme 1:

The time domain indication information is used to indicate the time interval between the PSSCH for transmitting each TB and the PSFCH for transmitting its corresponding HARQ information. For different TBs, the time intervals indicated by the corresponding time domain indication information may be different.

Wherein, the above-mentioned time interval may be a start time interval or an end time interval, which is not limited in this embodiment of the present application.

The first terminal device determines the time-domain resource of the PSFCH resource according to the receiving moment of the first PSSCH and the time interval between the first PSSCH and the PSFCH corresponding to the first PSSCH. Wherein, the first PSSCH is used to transmit one or more TBs in the plurality of TBs.

Exemplarily, taking one PSSCH to transmit one TB as an example, for each TB, according to the time interval indicated by the time domain indication information corresponding to the TB and the time domain resource of the PSSCH resource for transmitting the TB, the transmission time can be determined. Time domain resource of PSFCH resource of HARQ information corresponding to TB.

It should be understood that when the HARQ information of multiple TBs needs to be fed back on the same PSFCH, the time domain resources of the PSFCH resources determined above for transmitting the HARQ information corresponding to each TB are the same.

Optionally, the above time domain indication information may be carried in the SCI. Exemplarily, the first terminal device also receives the SCI corresponding to each TB from the second terminal device. The SCI includes time-domain indication information (for example, PSSCH-to-HARQ_feedback), indicating the time interval between the PSSCH for transmitting the TB and the PSFCH for transmitting the corresponding HARQ information. In this way, the first terminal device can determine the time domain resource of the PSFCH resource for transmitting the HARQ information corresponding to the TB according to the time domain resource of the PSSCH resource for transmitting the TB and the time interval carried in the SCI corresponding to the TB.

Optionally, the above time domain indication information is carried in the second-order SCI. Exemplarily, a new format of the second-order SCI can be used, for example, SCI format 2-C. At this point, the value of the 2nd-stage SCI formats field in the first-stage SCI can be set to 10 or 11 to indicate the SCI format 2-C.

Optionally, the second-order SCI may further include a sidelink assignment index (sidelink assignment index, SAI), which is used to indicate the position of the HARQ information corresponding to the TB in the codebook (codebook).

In this scheme, the second terminal device dynamically indicates the time interval between the PSSCH for transmitting each TB and the PSFCH for transmitting its corresponding HARQ information in the SCI, so that the first terminal device can determine the time interval according to the time interval indicated in the SCI. Find out which time domain resource needs to feed back the HARQ information of the TB.

For example, FIG. 7 is a schematic diagram of determining time-domain resources of PSFCH resources provided by an embodiment of the present application. As shown in FIG. 7 , it is assumed that the first terminal device receives 3 TBs, which are TB1 transmitted in time slot 1, TB2 transmitted in time slot 2, and TB3 transmitted in time slot 3. Assume that the time interval (PSSCH-to-HARQ_feedback) carried in the SCI corresponding to TB1 transmitted in time slot 1 is 3 time slots, and the time interval (PSSCH-to-HARQ_feedback) carried in the SCI corresponding to TB2 transmitted in time slot 2 (PSSCH-to-HARQ_feedback) is three time slots. -HARQ_feedback) is 2 time slots, and the time interval (PSSCH-to-HARQ_feedback) carried in the SCI corresponding to TB3 transmitted in time slot 3 is 1 time slot. In this way, after receiving the above three TBs, the first terminal device may determine that the HARQ information of the above TB1, TB2, and TB3 needs to be fed back in time slot 4.

Time domain resource determination scheme 2:

The time domain indication information is used to indicate the period of the PSFCH. Exemplary PSFCH periods may be 1, 2, 4 slots, etc.

Optionally, the above time domain indication information may be carried in RRC signaling.

In this solution, the first terminal device may determine the time domain resource of the PSFCH resource according to the period of the PSFCH. For example, it is assumed that the period of PSFCH is 4 time slots, that is, there are PSFCH resources in time slot 4 and time slot 8 . After receiving the TB in time slot 1, time slot 2, time slot 3, and time slot 4, the first terminal device may determine that the time domain resource of the PSFCH resource is time slot 4. After receiving the TB in time slot 5, time slot 6, time slot 7, and time slot 8, the first terminal device may determine that the time domain resource of the PSFCH resource is time slot 8.

Time domain resource determination scheme 3:

The time domain indication information is used to indicate the HARQ information feedback period. Wherein, the feedback period of the HRAQ information is K times the period of the PSFCH, and K is an integer greater than or equal to 1.

For example, assuming K=2, if the period of PSFCH is 2 time slots, then the feedback period of HARQ information is 4 time slots. For example, there are PSFCH resources in slot 2, slot 4, slot 6, and slot 8. However, when this solution is adopted, HARQ information feedback is only performed in time slot 4 and time slot 8 . That is to say, assuming that the first terminal device receives a TB in time slot 1, time slot 2, time slot 3, and time slot 4, it determines that the time domain resource of the PSFCH resource is time slot 4. Assuming that the first terminal device receives TBs in time slot 5, time slot 6, time slot 7, and time slot 8, it determines that the time domain resource of the PSFCH resource is time slot 8.

Optionally, the above time domain indication information may be carried in RRC signaling.

In the embodiment of the present application, when the first terminal device determines the frequency domain resource of the PSFCH resource, it may adopt the following possible solutions.

Frequency domain resource determination scheme 1:

The first terminal device determines the frequency domain resource of the PSFCH resource according to the time-frequency resource occupied by the PSSCH for transmitting at least one TB of the multiple TBs.

Optionally, the first terminal device determines the frequency domain resource of the PSFCH resource according to the time-frequency resource occupied by the PSSCH for transmitting the first TB. The first TB is any one of the multiple TBs.

Exemplarily, the first terminal device acquires a PSFCH resource set, and the PSFCH resource set includes multiple PRBs. The PSFCH resource set may be pre-configured by the network device to the first terminal device. The first terminal device determines n PRBs from the PSFCH resource pool according to the first number n and the time-frequency resources occupied by the PSSCH for transmitting the first TB, where n is an integer greater than or equal to 1, and the n PRBs are related to the transmission first There is a preset mapping relationship between the time-frequency resources occupied by the PSSCH of a TB. The first terminal device determines n PRBs as frequency domain resources of PSFCH resources.

Wherein, the above-mentioned preset mapping relationship may refer to an association relationship between each subchannel of each time slot of the PSSCH and available PRBs of the PSFCH, and the above-mentioned association relationship may be as shown in FIG. 4 . The foregoing association relationship may be pre-configured by the network device, or agreed in advance by the first terminal device and the second terminal device.

Optionally, the first TB is the first TB among the multiple TBs. Exemplarily, FIG. 8 is a schematic diagram of determining frequency domain resources of PSFCH resources provided by an embodiment of the present application. As shown in Figure 8, assuming that the first terminal device receives TB1, TB2, TB3, and TB4 in sequence, the time-frequency resource occupied by the PSSCH that transmits TB1 (that is, the first received TB) can be used to determine the association of TB1 From the PSFCH resources associated with TB1, determine the frequency domain resources of the PSFCH resources that are finally used to feed back the HARQ information of the above four TBs.

The following describes in detail how to determine the frequency domain resource of the PSFCH resource according to the time-frequency resource occupied by the first TB.

(1) Obtain a PRB set (PRB set) available for the PSFCH in the resource pool.

(2) Obtain a PSFCH usable PRB subset (PRB subset) associated with each subchannel on each time slot within a PSFCH cycle.

Wherein, the above-mentioned steps (1) and (2) are the same as the steps (1) and (2) in the aforementioned related art, and will not be repeated here.

(3) According to the time-frequency resource occupied by the PSSCH for transmitting the first TB, determine a candidate PRB for transmitting the PSFCH.

Specifically, for each subchannel of the time slot occupied by the PSSCH transmitting the first TB, the above formula (1) can be substituted into the above formula (1), and the PSFCH available PRB associated with each subchannel of the time slot occupied by the PSSCH transmitting the first TB can be determined .

Further, the following formula (5) can be used to determine the candidate PRB for sending PSFCH from the PSFCH available PRB associated with each subchannel of the time slot occupied by the PSSCH for transmitting the first TB:

取值为1或

为传输第一TB的PSSCH所占的子信道总数。n为本申请实施例中的第一数量，即，本次发送PSFCH所需的PRB的数量，n为大于0的整数。

为用于发送PSFCH的候选PRB。In the above formula (5),

Takes a value of 1 or

It is the total number of subchannels occupied by the PSSCH transmitting the first TB. n is the first number in this embodiment of the present application, that is, the number of PRBs required for sending the PSFCH this time, and n is an integer greater than 0.

is a candidate PRB for sending PSFCH.

Optionally, the first number n may be carried in SCI or RRC signaling.

The value of the first number n may be determined by the number of bits of the HARQ information to be fed back and the modulation order.

Optionally, the first number n may be obtained according to a preset field in the SCI. For example, the first number n can be obtained according to the SAI field in the second-order SCI. In this way, according to actual needs, it is possible to determine in real time how many PSFCH PRBs the HARQ information to be fed back needs to occupy, and determine PSFCH resources as needed, without causing waste of PSFCH resources.

取值为1时，说明将PSSCH所占的其中一个子信道关联的PSFCH可用PRB子集作为候选PRB。图5A为本申请实施例提供的一种确定PSFCH候选PRB的方式示意图，如图5A所示，假设第一终端设备接收到的传输第一TB的PSSCH占了4个子信道，分别为子信道1至子信道4，可以将子信道1关联的PSFCH可用PRB子集作为候选PRB。其中，子信道1关联的PSFCH可用PRB子集可以通过上述公式(1)得到。when

When the value is 1, it indicates that the PSFCH associated with one of the subchannels occupied by the PSSCH can be used as a candidate PRB. FIG. 5A is a schematic diagram of a method for determining PSFCH candidate PRBs provided by the embodiment of the present application. As shown in FIG. 5A , it is assumed that the PSSCH for transmitting the first TB received by the first terminal device occupies 4 subchannels, which are respectively subchannel 1 For sub-channel 4, the PSFCH available PRB subset associated with sub-channel 1 may be used as a candidate PRB. Wherein, the PSFCH available PRB subset associated with sub-channel 1 can be obtained by the above formula (1).

取值为

时，说明将PSSCH所占的所有子信道关联的PSFCH可用PRB子集均作为候选PRB。图5B为本申请实施例提供的另一种确定PSFCH候选PRB的方式示意图，如图5B所示，假设第一终端设备接收到的传输第一TB的PSSCH占了4个子信道，分别为子信道1至子信道4，可以将子信道1关联的PSFCH可用PRB子集、子信道2关联的PSFCH可用PRB子集、子信道3关联的PSFCH可用PRB子集、子信道4关联的PSFCH可用PRB子集均作为候选PRB。其中，每个子信道关联的PSFCH可用PRB子集可以通过上述公式(1)得到。when

The value is

, it indicates that the PSFCH available PRB subsets associated with all subchannels occupied by the PSSCH are used as candidate PRBs. FIG. 5B is a schematic diagram of another method for determining PSFCH candidate PRBs provided by the embodiment of the present application. As shown in FIG. 5B , it is assumed that the PSSCH for transmitting the first TB received by the first terminal device occupies 4 subchannels, and the subchannels are respectively From 1 to subchannel 4, the available PRB subset of PSFCH associated with subchannel 1, the available PRB subset of PSFCH associated with subchannel 2, the available PRB subset of PSFCH associated with subchannel 3, and the available PRB subset of PSFCH associated with subchannel 4 All sets are used as candidate PRBs. Wherein, the PSFCH available PRB subset associated with each subchannel can be obtained by the above formula (1).

(4) Determine the target PRB finally used to carry the HARQ information from the candidate PRBs.

Exemplarily, the following formula (6) can be used to determine the target PRB:

Among them, P _ID represents the identity of the sending terminal (ie, the second terminal device), and when the side-line communication is multicast type 1, M _ID represents the sending terminal (ie, the second terminal device) and the receiving terminal (ie, the first terminal device) The ID of the group the group is in. M _ID =0 when the side communication is unicast and multicast type 2. Wherein, the multicast type 1 means that the receiving terminal only supports feedback of NACK, and the multicast type 2 means that the receiving terminal can feed back both NACK and ACK. The identifier of the terminal device and the identifier of the group may be allocated when a terminal device establishes a connection with a network device, or may be allocated when a sideline connection is established between a terminal device and a terminal device. The indices of n PRBs can be determined through the above formula (6), and the n PRBs are target PRBs.

For ease of understanding, an example is given below.

取值为1，根据上述公式(1)和(2)确定出的每个子信道关联的PSFCH可用PRB中包括50个PRB，即

若n＝2，则上述公式(5)的含义为：将连续两个PRB划分为1组，从而将50个PRB划分为25组，

这样，上述50个PRB转换为25个组索引，每个组中有两个PRB。根据公式(6)可以从25个组索引中确定出一个组索引，该组索引对应的组中的PRB即为目标PRB。这样，最终确定出的目标PRB的数量为2。Assuming that in the above formula (5)

The value is 1, and the PSFCH available PRBs associated with each subchannel determined according to the above formulas (1) and (2) include 50 PRBs, that is

If n=2, the meaning of the above formula (5) is: divide two consecutive PRBs into one group, thus divide 50 PRBs into 25 groups,

In this way, the above 50 PRBs are converted into 25 group indices, with two PRBs in each group. According to formula (6), one group index can be determined from 25 group indexes, and the PRB in the group corresponding to the group index is the target PRB. In this way, the final determined number of target PRBs is two.

The difference between this solution and the above-mentioned existing way of determining PSFCH resources is that the first number n is introduced in step (3). Since the above-mentioned existing PSFCH resource determination method can only determine a single PRB, it may not be enough to feed back the HARQ information of multiple TBs. Therefore, this solution can determine n PRBs by introducing the first number n, so that it can be used for Feedback the HARQ information of multiple TBs.

Frequency domain resource determination scheme 2:

The frequency domain indication information includes at least one PRB index; the first terminal device may determine the frequency domain resource of the PSFCH resource according to the at least one PRB index.

Optionally, the above frequency domain indication information may be carried in the SCI or in the RRC signaling.

Optionally, the above frequency domain indication information may be carried in the second-order SCI. The PSFCH resource set indication (resource set indication) information field is included in the second-order SCI, and the information field includes one or more PRB indexes. The index of the included PRB can be configured by RRC parameters.

Exemplarily, a new format of the second-order SCI can be used, for example, SCI format 2-C. At this point, the value of the 2nd-stage SCI formats field in the first-stage SCI can be set to 10 or 11 to indicate the SCI format 2-C.

In this embodiment of the present application, considering forward compatibility, for the above frequency domain resource determination scheme 1, the available PRBs for PSFCH in the resource pool in step (1) may be different from the frequency domain resources for PSFCH in protocol version R16. For the above frequency domain resource determination scheme 2, the PSFCH resource indicated in the 2nd-stage SCI may be different from the PSFCH frequency domain resource in the protocol version R16.

In the embodiment of the present application, when determining PSFCH resources, the above-mentioned time domain resource determination scheme 1, time domain resource determination scheme 2 and time domain resource determination scheme 3, frequency domain resource determination scheme 1, and frequency domain resource determination scheme 2 can be used in combination . In the following, several implementation schemes are combined with examples for illustration.

In the first implementation manner, when determining the time domain resource of the PSFCH resource, the time domain resource determination scheme 1 is adopted, and when the frequency domain resource of the PSFCH resource is determined, the frequency domain resource determination scheme 1 is adopted.

In the second implementation manner, when determining the time domain resource of the PSFCH resource, the time domain resource determination scheme 1 is adopted, and when the frequency domain resource of the PSFCH resource is determined, the frequency domain resource determination scheme 2 is adopted.

In a third implementation manner, when determining the time domain resource of the PSFCH resource, the time domain resource determination scheme 2 is adopted, and when the frequency domain resource of the PSFCH resource is determined, the frequency domain resource determination scheme 1 is adopted.

In a fourth implementation manner, when determining the time domain resource of the PSFCH resource, the time domain resource determination scheme 2 is adopted, and when the frequency domain resource of the PSFCH resource is determined, the frequency domain resource determination scheme 2 is adopted.

In the fifth implementation manner, when determining the time domain resource of the PSFCH resource, the time domain resource determination scheme 3 is adopted, and when the frequency domain resource of the PSFCH resource is determined, the frequency domain resource determination scheme 1 is adopted.

In the sixth implementation manner, when determining the time domain resource of the PSFCH resource, the time domain resource determination scheme 3 is adopted, and when the frequency domain resource of the PSFCH resource is determined, the frequency domain resource determination scheme 2 is adopted.

In the above six implementation manners, each scheme for determining resources in the time domain and each scheme for determining resources in the frequency domain may refer to the detailed descriptions of the foregoing embodiments, and details are not repeated here.

The embodiment of the present application realizes the multiplexing of HARQ information corresponding to multiple TBs (PSSCHs) into one PSFCH, which meets the requirement of the HARQ information multiplexing scenario and improves the resource utilization rate of feeding back the HARQ information.

FIG. 9 is a schematic structural diagram of a communication device provided by an embodiment of the present application. The communication device provided in this embodiment may be in the form of software and/or hardware. The communication device provided in this embodiment may be a terminal device, or may be a module, unit, chip, chip module, etc. in the terminal device.

As shown in FIG. 9 , the communication device 900 provided in this embodiment includes: a receiving module 901 and a sending module 903 . in,

The receiving module 901 is configured to perform the receiving step performed by the first terminal device in the foregoing method embodiments. For example, the receiving module 901 may execute S601 or S611 in the foregoing embodiments.

The sending module 903 is configured to execute the receiving step executed by the first terminal device in the above method embodiment. For example, the sending module 903 may execute S602 or S613 in the foregoing embodiments.

In a possible implementation manner, as shown in FIG. 9 , the communications apparatus 900 may further include a determination module 902 configured to perform the step of determining PSFCH resources performed by the first terminal device in the above method embodiments. For example, the determining module 902 may execute S612 in the foregoing embodiments.

The communication device provided in this embodiment can be used to implement the communication method performed by the first terminal device in any of the above method embodiments, and its implementation principle and technical effect are similar, and details are not described here.

FIG. 10 is a schematic structural diagram of another communication device provided by an embodiment of the present application. The communication device may be a terminal device, or a chip, a chip module, a processor, etc. in the terminal device. As shown in FIG. 10 , a communication device 1000 provided in this embodiment includes: a transceiver 1001 , a memory 1002 , and a processor 1003 . The transceiver 1001 may include: a transmitter and/or a receiver. The transmitter may also be called a transmitter, a transmitter, a sending port, or a sending interface, and similar descriptions, and the receiver may also be called a receiver, a receiver, a receiving port, or a receiving interface, or similar descriptions. Exemplarily, the transceiver 1001 , the memory 1002 , and the processor 1003 are connected to each other through a bus 1004 .

The memory 1002 is used to store computer-executable instructions;

The processor 1003 is configured to execute the computer-executed instructions stored in the memory, so as to enable the communication device 1000 to execute the method shown in any of the foregoing embodiments.

Wherein, the transmitter in the transceiver 1001 may be used to perform the sending function of the terminal device in the above method embodiment. The receiver in the transceiver 1001 may be used to perform the receiving function of the terminal device in the foregoing method embodiments. The processor 1003 may be configured to execute the communication method executed by the terminal device in the foregoing method embodiments.

The communication device provided in this embodiment can be used to implement the communication method performed by the first terminal device in any of the above method embodiments, and its implementation principle and technical effect are similar, and details are not described here.

An embodiment of the present application also provides a computer-readable storage medium, where the computer-readable storage medium stores a computer program, and when the computer program is executed by a computer, it can implement the method executed by the first terminal device in any of the above method embodiments. The implementation principle and technical effect of the communication method are similar, and will not be repeated here.

The embodiment of the present application also provides a chip, including: a memory, a processor, and hardware system resources, the memory stores computer-executed instructions, and the processor executes the computer-executed instructions to implement any of the above method embodiments The implementation principle and technical effect of the communication method performed by the first terminal device are similar, and will not be repeated here.

The embodiment of the present application also provides a computer program product, including a computer program. When the computer program is executed by a computer, the communication method performed by the first terminal device in any of the above method embodiments is implemented, and its implementation principle and technical effect are similar. I won't go into details here.

In the several embodiments provided in this application, it should be understood that the disclosed devices and methods may be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the modules is only a logical function division. In actual implementation, there may be other division methods, for example, multiple modules can be combined or integrated. to another system, or some features may be ignored, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or modules may be in electrical, mechanical or other forms.

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

In addition, each functional module in each embodiment of the present application may be integrated into one processing unit, each module may exist separately physically, or two or more modules may be integrated into one unit. The units formed by the above modules can be implemented in the form of hardware, or in the form of hardware plus software functional units.

The above-mentioned integrated modules implemented in the form of software function modules can be stored in a computer-readable storage medium. The above-mentioned software function modules are stored in a storage medium, and include several instructions to enable a computer device (which may be a personal computer, server, or network device, etc.) or a processor (processor) to execute the method described in each embodiment of the present application. partial steps.

It should be understood that the above-mentioned processor may be a central processing unit (Central Processing Unit, CPU), and may also be other general-purpose processors, digital signal processors (Digital Signal Processor, DSP), application specific integrated circuits (Application Specific Integrated Circuit, ASIC) wait. A general-purpose processor may be a microprocessor, or the processor may be any conventional processor, or the like. The steps of the method disclosed in conjunction with the application can be directly implemented by a hardware processor, or implemented by a combination of hardware and software modules in the processor.

The storage may include a high-speed RAM memory, and may also include a non-volatile storage NVM, such as at least one disk storage, and may also be a U disk, a mobile hard disk, a read-only memory, a magnetic disk, or an optical disk.

The bus may be an Industry Standard Architecture (Industry Standard Architecture, ISA) bus, a Peripheral Component Interconnect (Peripheral Component, PCI) bus, or an Extended Industry Standard Architecture (Extended Industry Standard Architecture, EISA) bus, etc. The bus can be divided into address bus, data bus, control bus and so on. For ease of representation, the buses in the drawings of the present application are not limited to only one bus or one type of bus.

The above-mentioned storage medium can be realized by any type of volatile or non-volatile storage device or their combination, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable In addition to programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk or optical disk. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.

An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. Of course, the storage medium may also be a component of the processor. The processor and the storage medium may be located in application specific integrated circuits (Application Specific Integrated Circuits, ASIC). Of course, the processor and the storage medium can also exist in the electronic device or the main control device as discrete components.

Those of ordinary skill in the art can understand that all or part of the steps for implementing the above method embodiments can be completed by program instructions and related hardware. The aforementioned program can be stored in a computer-readable storage medium. When the program is executed, it executes the steps including the above-mentioned method embodiments; and the aforementioned storage medium includes: ROM, RAM, magnetic disk or optical disk and other various media that can store program codes.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit it; although the application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the various embodiments of the present application. scope.

Claims (14)

1. A communication method, characterized in that, comprising: The first terminal device receives multiple different transport blocks TB through multiple physical sidelink shared channels PSSCH; The first terminal device sends hybrid automatic repeat request HARQ information corresponding to the multiple different TBs on a physical sidelink feedback channel PSFCH resource, where the PSFCH resource includes at least one physical resource block PRB in the frequency domain. 2. The method according to claim 1, wherein the first terminal device sends the HARQ information corresponding to the multiple different TBs on the PSFCH resource, comprising: The first terminal device sends a coding result on the PSFCH resource, where the coding result is a result obtained by coding the HARQ information corresponding to the multiple TBs. 3. The method according to claim 1 or 2, wherein the PSFCH resources include time-domain resources and frequency-domain resources, and the first terminal device transmits information corresponding to the multiple different TBs on the PSFCH resources. Before the HARQ information, the method also includes: The first terminal device determines the time domain resource of the PSFCH resource according to the time domain indication information; The first terminal device determines the frequency-domain resource of the PSFCH resource according to the frequency-domain indication information or the time-frequency resource occupied by the PSSCH transmitting at least one of the multiple TBs. 4. The method according to claim 3, wherein the time domain indication information is used to indicate the time interval between the PSSCH for transmitting each TB and the PSFCH for transmitting its corresponding HARQ information; The first terminal device determines the time domain resource of the PSFCH resource according to the time domain indication information, including: The first terminal device determines the time domain resource of the PSFCH resource according to the receiving moment of the first PSSCH and the time interval between the first PSSCH and the PSFCH corresponding to the first PSSCH, and the first PSSCH uses for transmitting one or more TBs of the plurality of TBs. 5. The method according to claim 3, wherein the time domain indication information is used to indicate the period of the PSFCH; the first terminal device determines the time domain resource of the PSFCH resource according to the time domain indication information, include: The first terminal device determines the time domain resource of the PSFCH resource according to the period of the PSFCH. 6. The method according to claim 3, wherein the time domain indication information is used to indicate the HARQ information feedback cycle; the first terminal device determines the time domain resource of the PSFCH resource according to the time domain indication information ,include: The first terminal device determines the time domain position of the PSFCH resource according to the HARQ information feedback cycle; wherein, the HARQ information feedback cycle is K times the PSFCH cycle, and K is an integer greater than or equal to 1 . 7. The method according to any one of claims 3 to 6, wherein the frequency domain indication information comprises: an index of the at least one PRB; The first terminal device determines the frequency domain resource of the PSFCH resource according to the frequency domain indication information, including: The first terminal device determines frequency domain resources of the PSFCH resources according to the index of the at least one PRB. 8. The method according to any one of claims 3 to 6, wherein the first terminal device determines the PSFCH according to the time-frequency resource occupied by the PSSCH transmitting at least one TB among the multiple TBs Resources in the frequency domain, including: The first terminal device acquires a PSFCH resource set, where the PSFCH resource set includes multiple PRBs; The first terminal device determines n PRBs from the PSFCH resource pool according to the first number n and the time-frequency resources occupied by the PSSCH for transmitting the first TB, where n is an integer greater than or equal to 1, and the n There is a preset mapping relationship between a PRB and the time-frequency resource occupied by the PSSCH for transmitting the first TB, where the first TB is any one of the multiple TBs; The first terminal device determines the n PRBs as frequency domain resources of the PSFCH resources. 9. The method according to claim 8, wherein the first number n is carried in sidelink control information (SCI) or radio resource control (RRC) signaling. 10. The method according to claim 3, wherein the time domain indication information is carried in SCI or RRC signaling, and/or the frequency domain indication information is carried in SCI or RRC signaling. 11. A communication device, characterized in that the communication device comprises: A receiving module, configured to receive a plurality of different transport blocks TB through a plurality of physical sidelink shared channels PSSCH; The sending module is configured to send hybrid automatic repeat request HARQ information corresponding to the multiple different TBs on a physical sidelink feedback channel PSFCH resource, where the PSFCH resource includes at least one physical resource block PRB in the frequency domain. 12. A communication device, comprising: a processor, and a memory communicatively connected to the processor; the memory stores computer-executable instructions; The processor executes the computer-implemented instructions stored in the memory to implement the method of any one of claims 1-9. 13. A computer-readable storage medium, wherein a computer program is stored in the computer-readable storage medium, and when the computer program is executed by a computer, the method according to any one of claims 1 to 10 is executed implement. 14. A computer program product, characterized by comprising a computer program, and when the computer program is executed by a computer, the method according to any one of claims 1 to 10 is executed.

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