CN113285789B

CN113285789B - Resource indication method and device of auxiliary link control information and terminal equipment

Info

Publication number: CN113285789B
Application number: CN202010106335.7A
Authority: CN
Inventors: 邹蕾; 曲鑫
Original assignee: Spreadtrum Semiconductor Nanjing Co Ltd
Current assignee: Spreadtrum Semiconductor Nanjing Co Ltd
Priority date: 2020-02-20
Filing date: 2020-02-20
Publication date: 2023-02-14
Anticipated expiration: 2040-02-20
Also published as: WO2021164603A1; CN113285789A

Abstract

The embodiment of the application discloses a resource indication method and device of auxiliary link control information and terminal equipment, wherein the method comprises the following steps: the method comprises the steps that a first terminal device sends a first SCI to a second terminal device, the first SCI is used for indicating a first number of transmission resources and a second number of first HARQ feedback resources, the first number of transmission resources are used for data and SCI transmission between the second terminal device and a third terminal device, and the second number of first HARQ feedback resources are used for enabling the second terminal device to carry out first HARQ feedback to the first terminal device. Therefore, the time-frequency domain position information of the scheduled resource is indicated through the auxiliary link control information, and the resource allocation mode that the terminal equipment schedules the resource for other terminal equipment is facilitated.

Description

Resource indication method and device of auxiliary link control information and terminal equipment

Technical Field

The present application relates to the field of communications technologies, and in particular, to a resource indication method and apparatus for auxiliary link control information, and a terminal device.

Background

In a New Radio (NR) communication system of the fifth Generation (5 th-Generation, 5G), there are mainly two modes (modes) of resource allocation for a NR Secondary Link (SL), i.e., mode1 (mode 1) and mode2 (mode 2). Wherein, mode1 is that the base station schedules the auxiliary link resource to the terminal equipment for auxiliary link transmission; mode2 is where the terminal device determines the secondary link resources (pre) configured by the base station or network, and mode2 in turn contains 4 sub-modes, mode2a, mode2b, mode2 and mode2d.

In Release16 phase of the third Generation Partnership project (3 GPP), 3GPP focuses on standardizing mode2a, and a resource allocation mode for a terminal device to schedule resources for other terminal devices in mode2d is yet to be further studied.

Disclosure of Invention

The embodiment of the application provides a resource indication method and device of auxiliary link control information and terminal equipment, so that time-frequency domain position information of scheduled resources is expected to be indicated through the auxiliary link control information, and a resource allocation mode that the terminal equipment schedules the resources for other terminal equipment is facilitated.

In a first aspect, an embodiment of the present application provides a method for indicating resources of secondary link control information, including:

a first terminal device sends first auxiliary link control information SCI to a second terminal device, where the first SCI is used to indicate a first number of transmission resources and a second number of first hybrid automatic repeat request HARQ feedback resources, the first number of transmission resources is used to perform data and SCI transmission between the second terminal device and a third terminal device, the second number of first HARQ feedback resources is used to perform first HARQ feedback to the first terminal device by the second terminal device, a first HARQ feedback result carried on the second number of first HARQ feedback resources is determined according to a second HARQ feedback result, and the second HARQ feedback result is an HARQ feedback result of the third terminal device for a data transmission situation of the second terminal device on the first number of transmission resources.

In a second aspect, an embodiment of the present application provides a method for indicating resources of secondary link control information, including:

the method comprises the steps that a second terminal device receives a first SCI from a first terminal device, the first SCI is used for indicating a first number of transmission resources and a second number of first HARQ feedback resources, the first number of transmission resources are used for data and SCI transmission between the second terminal device and a third terminal device, the second number of first HARQ feedback resources are used for carrying out first HARQ feedback on the second terminal device to the first terminal device, a first HARQ feedback result carried on the second number of first HARQ feedback resources is determined according to a second HARQ feedback result, and the second HARQ feedback result is an HARQ feedback result of the third terminal device aiming at data transmission conditions of the second terminal device on the first number of transmission resources.

In a third aspect, an embodiment of the present application provides a resource indication apparatus for secondary link control information, which is applied to a first terminal device, where the apparatus includes a processing unit and a communication unit, and the processing unit is configured to:

sending first auxiliary link control information (SCI) to a second terminal device through the communication unit, where the first SCI is used to indicate a first number of transmission resources and a second number of first hybrid automatic repeat request (HARQ) feedback resources, the first number of transmission resources is used for data and SCI transmission between the second terminal device and a third terminal device, the second number of first HARQ feedback resources is used for a first HARQ feedback from the second terminal device to the first terminal device, a first HARQ feedback result carried on the second number of first HARQ feedback resources is determined according to a second HARQ feedback result, and the second HARQ feedback result is an HARQ feedback result of the third terminal device for a data transmission situation of the second terminal device on the first number of transmission resources.

In a fourth aspect, an embodiment of the present application provides a resource indication apparatus for secondary link control information, which is applied to a second terminal device, where the apparatus includes a processing unit and a communication unit, and the processing unit is configured to:

receiving, by the communication unit, first auxiliary link control information SCI from a first terminal device, where the first SCI is used to indicate a first number of transmission resources and a second number of first HARQ feedback resources, the first number of transmission resources is used for data and SCI transmission between the second terminal device and a third terminal device, the second number of first HARQ feedback resources is used for the second terminal device to perform first HARQ feedback to the first terminal device, a first HARQ feedback result carried on the second number of first HARQ feedback resources is determined according to a second HARQ feedback result, and the second HARQ feedback result is an HARQ feedback result of the third terminal device for a data transmission condition of the second terminal device on the first number of transmission resources.

In a fifth aspect, the present application provides a terminal device, which is a first terminal device, and includes a processor, a memory, a communication interface, and one or more programs, where the one or more programs are stored in the memory and configured to be executed by the processor, and the program includes instructions for executing the steps in any of the methods of the first aspect of the present application.

In a sixth aspect, the present application provides a terminal device, which is a second terminal device, and includes a processor, a memory, a communication interface, and one or more programs, where the one or more programs are stored in the memory and configured to be executed by the processor, and the program includes instructions for executing the steps in any of the methods in the second aspect of the present application.

In a seventh aspect, an embodiment of the present application provides a chip, including: and the processor is used for calling and running the computer program from the memory so that the device provided with the chip executes part or all of the steps described in the method of any one of the first aspect or the second aspect of the embodiment of the application.

In an eighth aspect, the present application provides a computer-readable storage medium, where the computer-readable storage medium stores a computer program for electronic data exchange, where the computer program makes a computer perform part or all of the steps described in any one of the methods of the first aspect or the second aspect of the present application.

In a ninth aspect, embodiments of the present application provide a computer program, where the computer program is operable to cause a computer to perform some or all of the steps as described in any of the methods of the first or second aspects of the embodiments of the present application. The computer program may be a software installation package.

It can be seen that, in the embodiment of the present application, the first terminal device issues an auxiliary link control information, and the second terminal device can obtain the resource scheduled to the second terminal device by detecting and decoding the auxiliary link control information. The second terminal equipment can perform secondary link transmission and second HARQ feedback with the third terminal equipment by using the resource, and perform first HARQ feedback with the first terminal equipment according to the second HARQ feedback result. The time-frequency domain position information of the scheduled resources is indicated through the auxiliary link control information, so that the resource allocation mode that the terminal equipment schedules the resources for other terminal equipment is facilitated.

Drawings

The drawings that need to be used in the description of the embodiments or the prior art will be briefly described below.

Fig. 1A is a schematic architecture diagram of a communication system according to an embodiment of the present application;

fig. 1B is a schematic diagram of a resource pool provided in an embodiment of the present application;

fig. 1C is a schematic diagram of a resource allocation manner in a mode2d according to an embodiment of the present application;

fig. 1D is a schematic diagram of a physical secondary link feedback channel resource provided in an embodiment of the present application;

fig. 1E is a schematic diagram of a implicit mapping relationship between a transmission resource and a feedback resource of a physical secondary link according to an embodiment of the present disclosure;

fig. 2A is a flowchart illustrating a resource indication method for secondary link control information according to an embodiment of the present application;

fig. 2B is a schematic diagram of a resource indication field in secondary link control information according to an embodiment of the present application;

fig. 2C is a schematic diagram of a resource indication field in further secondary link control information provided in an embodiment of the present application;

fig. 2D is a schematic diagram of an independent physical secondary link control channel and a data transmission single sub-channel according to an embodiment of the present application;

fig. 3 is a block diagram illustrating functional units of a resource indication apparatus for secondary link control information according to an embodiment of the present application;

fig. 4 is a block diagram illustrating functional units of a resource indication apparatus for secondary link control information according to another embodiment of the present application;

fig. 5 is a schematic structural diagram of a first terminal device according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of a second terminal device according to an embodiment of the present application.

Detailed Description

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

Before describing the resource indication method of the secondary link control information provided in the embodiment of the present application in detail, a communication system to which the embodiment of the present application can be applied is described first, and please refer to fig. 1A. Therein, the example communication system 100 includes a first terminal device 110A, a second terminal device 110B, and a third terminal device 110C. A secondary link is established between the first terminal device 110A and the second terminal device 110B, and a secondary link is established between the second terminal device 110B and the third terminal device 110C. Then, the first terminal device 110A may schedule resources to the second terminal device 110B, and the second terminal device 110B may perform Hybrid Automatic Repeat request (HARQ) feedback with the third terminal device 110C on the scheduled resources, and perform HARQ feedback with the first terminal device 110A. It should be noted that the number of the first terminal device 110A, the second terminal device 110B, and the third terminal device 110C is not limited to one, and may be a plurality of each. Further, terminal devices 110 may include a first terminal device 110A, a second terminal device 110B, and a third terminal device 110C.

Specifically, the exemplary communication System 100 may include a Long Term Evolution (LTE) System, an LTE Frequency Division Duplex (FDD) System, an LTE Time Division Duplex (TDD) System, a Universal Mobile Telecommunications System (UMTS), a fifth generation (5 th generation,5 g) New air interface (New Radio, NR) communication System, and a Non-Terrestrial communication Network (NTN) System.

Specifically, the terminal device 110 in the embodiment of the present application may refer to a vehicle-mounted device, a vehicle-mounted terminal, a vehicle device, an automobile device, or the like, or may refer to a user device, an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a user terminal, a wireless communication device, a user agent, or a user equipment. Terminal device 110 may also be a cellular telephone, a cordless telephone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with Wireless communication capability, a computing device or other processing device connected to a Wireless modem, a relay device, a wearable device, a terminal device in a 5G NR system, or a terminal device in a future evolved Public Land Mobile Network (PLMN). The embodiments of the present application do not limit this.

In the embodiment of the present application, the terminal device 110 includes a hardware layer, an operating system layer running on top of the hardware layer, and an application layer running on top of the operating system layer. The hardware layer includes hardware such as a Central Processing Unit (CPU), a Memory Management Unit (MMU), and a Memory (also referred to as a main Memory). The operating system may be any one or more computer operating systems that implement business processing through processes (processes), such as a Linux operating system, a Unix operating system, an Android operating system, an iOS operating system, or a windows operating system. The application layer comprises applications such as a browser, an address list, word processing software, instant messaging software and the like. Furthermore, the embodiment of the present application does not particularly limit a specific structure of the execution subject of the method provided in the embodiment of the present application, as long as the program recorded with the code of the method provided in the embodiment of the present application can be run to perform communication according to the method provided in the embodiment of the present application, for example, the execution subject of the method provided in the embodiment of the present application may be the terminal device 110, or a functional module capable of calling the program and executing the program in the terminal device 110.

Before describing the resource indication method of the secondary link control information provided in the embodiment of the present application in detail, the related communication technology in the embodiment of the present application is described again.

Resource pool:

referring to fig. 1B, fig. 1B is a schematic diagram of a resource pool according to an embodiment of the present disclosure. The granularity of the time domain is a slot (slot), the granularity of the frequency domain is a data transmission sub-channel (subchannel), and each data transmission sub-channel contains m Resource Blocks (RBs), where m is configured by a higher layer. When the terminal device 110 selects the transmission resource, it may be determined that L data transmission sub-channels are required for transmission according to the size of the data packet. Then, the transmission resource is L consecutive subframes in a certain time slot in the resource pool, for example, one transmission resource of L =3 in fig. 1B. A Physical downlink Control Channel (PSCCH) and a Physical downlink shared Channel (PSCCH) are simultaneously transmitted on each transmission resource. That is, each transmission will contain both PSCCH and PSCCH. Meanwhile, PSCCH is used to carry secondary link Control information (SCI), and PSCCH is used to carry transmission data. The SCI may include time-frequency domain location information of a current transmission resource and time-frequency domain location information of a transmission resource reserved later, and may also include some parameters in decoding the PSSCH. In the transmission resource, the frequency domain starting position of the PSCCH is the same as the frequency domain starting position of the PSSCH, and when the PSCCH is detected, the frequency domain starting position of the current PSSCH can be acquired.

Resource allocation scheme in mode2d (mode 2 d):

in the resource allocation manner in mode2d, one terminal device 110 may schedule transmission resources for one or more terminal devices 110. In the embodiment of the present application, the terminal device 110 that schedules resources is a first terminal device 110A, and the other or more terminal devices 110 that are scheduled are second terminal devices 110B. The first terminal device 110A then schedules transmission resources for the second terminal device 110B. First, the first terminal device 110A obtains a set of resources (group resources), and then the first terminal device 110A schedules the resources in the set of resources to the second terminal device 110B for secondary link transmission. The following two scenarios are specifically considered for the first terminal device 110A to acquire the set of resources:

scene 1: the first terminal device 110A operates in mode1 (mode 1)

Referring to fig. 1C, the network device 120 allocates a set of resources to the first terminal device 110A in the resource pool by means of dynamic scheduling or configuration Grant (Configured Grant), and then the first terminal device 110A schedules the resources to the second terminal device 110B in the set of resources for secondary link transmission.

Network device 120 in the embodiment of the present application may be a device for communicating with terminal device 110. The Network device 120 may include an Evolved Node B (eNB or eNodeB) in a Long Term Evolution (Long Term Evolution, LTE) system, a Next Generation Node B (gNB or gnnodeb) and a Next Generation Evolved Node B (ng-eNB or ng-eNodeB) in a 5G NR system, and a Radio controller in a Cloud Radio Access Network (CRAN) scenario. Furthermore, the network device 120 may also include one or a group (including multiple antenna panels) of antenna panels of a relay device, an access point, a vehicle-mounted device, a wearable device, a base station in a 5G NR system, a network node constituting a gNB or a transmission point, such as a Baseband Unit (BBU) or a Distributed Unit (DU). The embodiments of the present application are not limited.

Scene 2: first terminal device 110A operates in mode2

The first terminal device 110A selects a set of resources from the resource pool based on the sensing window and the resource selection window in the sensing resource allocation manner (mode 2 a), and then the first terminal device schedules the resources in the set of resources to the second terminal device 110B for the secondary link transmission.

For the above two scenarios, the manner for the first terminal device 110A to schedule the resource for the second terminal device 110B may be to dynamically schedule the transmission resource, or may configure the transmission resource through configuration authorization. In addition, the manner for the second terminal device 110B to obtain the transmission resource may also be: after the first terminal device 110A obtains a set of resources, it notifies the second terminal device 110B of the set of resources, and then the second terminal device 110B selects transmission resources within the set of resources based on the sensing window and the resource selection window in the sensed resource allocation manner (mode 2 a).

Physical secondary link Feedback Channel (PSFCH) resource:

for each resource pool, the PSFCH resources may or may not be (pre-) configured. When a certain resource pool is (pre-) configured with PSFCH resources, the period of the PSFCH resources is configured, and the period N may be 1, 2, or 4 slots. As shown in fig. 1D, the resource pool is (pre-) configured with the PSFCH resource with a period N of 2, i.e. there is one PSFCH resource in every two slots. In addition, in the time domain, the PSFCH resource for transmitting the HARQ feedback information occupies one symbol in one slot. The PSFCH symbol used for transmitting HARQ feedback information may be the second to last symbol of the secondary link symbol. In the frequency domain, the PSFCH resources used for transmitting HARQ feedback information may be indicated by a (pre-) configured bitmap (bitmap) indicating which RBs within the resource pool bandwidth are PSFCH resources on the PSFCH symbol, and HARQ feedback information may be transmitted on these RBs.

HARQ feedback rules in secondary link:

when a resource pool (pre) is configured with resources that can be HARQ fed back, the second terminal device 110B may indicate, in the SCI of each transmission resource bearer, whether the third terminal device 110C needs to perform HARQ feedback in the current transmission. If the SCI in the current transmission indicates that the third terminal device 110C needs to perform HARQ feedback, the third terminal device 110C needs to perform HARQ feedback to the second terminal device 110B on the PSFCH resource corresponding to the current transmission after receiving the transmission. The PSFCH resource corresponding to the current transmission may be a implicit mapping relationship between the transmission resource and the PSFCH resource, which is described below.

In the secondary link, the SCI carried by each transmission resource does not indicate the PSFCH resource corresponding to the current transmission, but is implicitly indicated by the one-to-one correspondence between the current transmission and the PSFCH resource. That is, through the implicit mapping relationship between the transmission resource and the PSFCH resource, the third terminal device 110C may determine the PSFCH resource corresponding to the current transmission, and perform HARQ feedback on the corresponding PSFCH resource. In addition, the HARQ feedback rule in the secondary link is related to the transmission mode on the secondary link.

The transmission modes on the secondary link include the following three modes: unicast (unicast), multicast (groupcast) and broadcast (broadcast). Here, unicast refers to a terminal device transmitting data only to another terminal device. Multicast refers to a terminal device transmitting data to other terminal devices in the same group as the terminal device. That is, only the end devices in a group can receive the multicast data, and the higher layer indicates which end devices are in a group. Broadcast means that one terminal device transmits data to all other terminal devices and all terminal devices can receive the broadcast data. The new air interface secondary link (NR SL) may support unicast and multicast modes for HARQ feedback,

for the unicast mode, the third terminal device 110C performs HARQ feedback to the second terminal device 110B on the PSFCH resource. Feeding back a HARQ Acknowledgement (ACK) message on the PSFCH resources if the third terminal device 110C successfully receives data from the second terminal device 110B; feeding back a HARQ Negative (NACK) message on the PSFCH resource if the third terminal device 110C did not successfully receive; if the third terminal device 110C does not detect the PSCCH, i.e. the third terminal device 110C is not aware of the current transmission, the third terminal device 110C does not perform HARQ feedback. Meanwhile, the second terminal device 110B performs HARQ feedback detection on the PSFCH resource corresponding to the current transmission, and when it is detected that the third terminal device 110C feeds back HARQ NACK information, the second terminal device 110B retransmits data to the third terminal device 110C.

For the multicast mode, there are two types of HARQ feedback modes, namely, a first type of multicast HARQ feedback mode (groupcast option 1) and a second type of multicast HARQ feedback mode (groupcast option 2), and the SCI carried by the transmission resource indicates which type of HARQ feedback mode. The first multicast HARQ feedback mode supports that the third terminal device 110C only feeds back HARQ NACK information, and the third terminal devices 110C in all groups perform HARQ NACK feedback on the same PSFCH resource. That is, if there is a third terminal device 110C in the group that does not successfully receive, then the third terminal device 110C feeds back HARQ NACK information on the PSFCH resource corresponding to the current transmission; if the third terminal device 110C successfully receives or does not detect the PSCCH, no HARQ feedback is performed. Meanwhile, when the third terminal device 110C detects the HARQ NACK information of the third terminal device 110C on the corresponding PSFCH resource, the third terminal device 110C performs retransmission. The second type of multicast HARQ feedback mode supports the third terminal device 110C to perform HARQ ACK/NACK feedback, and each third terminal device 110C in the group has a corresponding PSFCH resource to feed back HARQ ACK/NACK messages. That is, if there are M third terminal devices 110C in the group, there will be M PSFCH resources. If the third terminal device 110C successfully receives, feeding back HARQ ACK information on the corresponding PSFCH resource; if the third terminal device 110C does not successfully receive, feeding back HARQ NACK information on the corresponding PSFCH resource; if the third terminal device 110C does not detect the PSCCH, the third terminal device 110C does not perform HARQ feedback on the PSFCH resources. Meanwhile, when the second terminal device 110B detects HARQ ACK information on all M PSFCH resources, the third terminal device 110C does not perform retransmission, otherwise, performs retransmission.

Implicit mapping relationship between transmission resources and PSFCH resources:

the high layer configures a k value, where the k value is used to indicate a time slot in which the PSFCH resource corresponding to the transmission resource in the time slot n is located. If there is a PSFCH resource in slot n + k, the third terminal device 110C performs HARQ feedback on the PSFCH resource in slot n + k; if there are no PSFCH resources in slot n + k, the third terminal device 110C performs HARQ feedback on the PSFCH resources in the first slot with PSFCH resources after slot n + k. Referring to fig. 1E, a PSFCH resource with a period of 2, that is, one PSFCH resource in a slot n +1 and one PSFCH resource in a slot n +3, is (pre-) configured in a certain resource pool, and a plurality of RBs corresponding to each PSFCH resource is determined according to bitmap. For the transmission resource in slot n, there is no PSFCH resource in slot n +2, so the third terminal device 110C performs feedback on the PSFCH resource in slot n +3, which is the first slot after slot n +2, that has the PSFCH resource. In addition, for the transmission resource of slot n +1, there is a PSFCH resource in slot n +3, so the third terminal device 110C performs HARQ feedback on the PSFCH resource in slot n + 3.

According to the above rules, the time slot in which the current transmission resource is located can determine in which time slot the corresponding PSFCH resource is. However, for the case of which (unicast, group host option 1) or which (group host option 2) PSFCH resource in the PSFCH resource within the specific corresponding slot, there is the following rule: the higher layer configures a Z value indicating that each data transmission subchannel corresponds to a PSFCH resource having Z RBs. If there are P slots for transmission on the PSFCH symbol in the same slot for HARQ feedback, then the first data transmission subchannel in the first slot of the P slots corresponds to the first PSFCH resource with Z RBs in the PSFCH symbol, the first data transmission subchannel in the second slot of the P slots corresponds to the 2 nd PSFCH resource with Z RBs in the PSFCH symbol, … …, and the second data transmission subchannel in the first slot of the P slots corresponds to the P +1 th PSFCH resource with Z RBs in the PSFCH symbol, … …. By analogy, it can finally be determined that each data transmission subchannel in each of the P slots corresponds to a respective PSFCH resource having Z RBs in the PSFCH symbol. As shown in fig. 1D, the first of the PSFCH symbols corresponding to the s-th slot within slot n has a PSFCH resource of 2 RBs. In addition, a plurality of resources may be included in one RB, and distinguished by cyclic shift (cyclic shift). For example, if one RB includes Y cycle shift resources, Z RBs include Z × Y PSFCH resources. For unicast and groupcast option1, only 1 PSFCH resource is needed for one transmission, and according to a formula Kmod (zx Y), one PSFCH resource of the zx Y PSFCH resources corresponding to a certain data transmission sub-channel can be determined, and the third terminal device 110C transmits HARQ feedback on the PSFCH resource, where K is an identifier (UE ID) of the second terminal device 110B carried in the SCI transmitted by the second terminal device 110B. For the groupcast option2, if there are M third terminal devices 110C in the group, then M PSFCH resources are needed for one transmission, and it is determined that the M PSFCH resources are M PSFCH resources among the Z × Y PSFCH resources corresponding to the data transmission subchannel according to the formula (K + M) mod (Z × Y), and the M third terminal devices 110C transmit respective HARQ feedback on the M PSFCH resources, respectively.

The following will describe the steps of performing the resource indication method of the secondary link control information from the perspective of method example, please refer to fig. 2A. Fig. 2A is a schematic flowchart of a method for indicating resources of secondary link control information according to an embodiment of the present application, where the method includes:

s210, the first terminal device 110A sends the first secondary link control information SCI to the second terminal device 110B.

Wherein the first SCI is used to indicate a first number of transmission resources and a second number of first HARQ feedback resources. It can be appreciated that the first SCI is specifically configured to indicate time-frequency domain location information of the first number of transmission resources and time-frequency domain location information of the second number of first HARQ feedback resources. The time-frequency domain position information of the first number of transmission resources may include a time slot position where each transmission resource in the first number of transmission resources is located, a frequency domain starting position of each transmission resource, and a frequency domain size (size) of each transmission resource, where the frequency domain size is used to represent the number of subchannels occupied in the frequency domain; the time-frequency domain position information of the second number of first HARQ feedback resources may include a time slot position where each first HARQ feedback resource in the second number of first HARQ feedback resources is located, a frequency domain starting position or a frequency domain size of each first HARQ feedback resource, and the like. It should be noted that whether the first SCI needs to indicate the frequency domain size of each of the second number of first HARQ feedback resources may be determined by the bearer channel of the first SCI. For example, if the bearer channel of the first SCI is a standby PSCCH or PSCCH + PSCCH single subframe, since the frequency domain sizes of the standby PSCCH and PSCCH + PSCCH single subframe are fixed, it is not necessary to indicate the frequency domain size of each first HARQ feedback resource in the first SCI. The frequency domain starting position of each first HARQ feedback resource indicated by the first SCI and the fixed frequency domain size are added to obtain the frequency domain size of each first HARQ feedback resource.

Specifically, the first number of transmission resources is used for data and SCI transmission between the second terminal device 110B and the third terminal device 110C, and the second number of first HARQ feedback resources is used for the second terminal device 110B to perform first HARQ feedback to the first terminal device 110A. The first HARQ feedback result carried on the second number of first HARQ feedback resources is determined according to the second HARQ feedback result, and the second HARQ feedback result is an HARQ feedback result of the third terminal device 110C for the data transmission situation of the second terminal device 110B on the first number of transmission resources.

Further, for a first HARQ feedback result carried on a second number of first HARQ feedback resources is determined according to a second HARQ feedback result, it should be noted that the second terminal device 110B detects HARQ feedback of the third terminal device 110C on a second HARQ feedback resource corresponding to the current transmission resource, and determines that the HARQ feedback is an HARQ ACK or NACK message, that is, the second HARQ feedback result, and then feeds back the determined HARQ feedback result, that is, the first HARQ feedback result, to the first terminal device 110A on a first HARQ feedback resource after the current transmission resource according to the second HARQ feedback result. And the judgment rule may be as follows: for the unicast HARQ feedback mode, when the second terminal device 110B detects the HARQ ACK message on the second HARQ feedback resource, the second terminal device 110B determines that the HARQ ACK message is the HARQ ACK and feeds back the HARQ ACK message to the first terminal device 110A, otherwise, determines that the HARQ NACK message is the HARQ NACK and feeds back the HARQ NACK message to the first terminal device 110A; for the first multicast HARQ feedback mode, when the second terminal device 110B detects HARQ NACK information on the second HARQ feedback resource, the second terminal device 110B feeds back HARQ NACK information to the first terminal device 110A, otherwise feeds back HARQ ACK information; for the second type of multicast HARQ feedback mode, when the second terminal device 110B detects HARQ ACK information on all corresponding second HARQ feedback resources, the second terminal device 110B feeds back HARQ ACK information to the first terminal device 110A, otherwise feeds back HARQ NACK information.

Further, the second HARQ Feedback resource may be a Physical Sidelink Feedback Channel (PSFCH) resource. Therefore, the second HARQ feedback resource corresponding to the current transmission resource can be determined according to the content in the above-mentioned "implicit mapping relationship between transmission resource and PSFCH resource", that is, a k value is configured by a higher layer signaling.

Further, regardless of the unicast or multicast HARQ feedback scheme, the number of bits of the HARQ ACK/NACK information transmitted by the second terminal device 110B to the first terminal device 110A is 1.

Further, as for the second HARQ feedback result that is the HARQ feedback result of the third terminal device 110C for the data transmission situation of the second terminal device 110B on the first number of transmission resources, it can be understood that the third terminal device 110C determines the data transmission situation of the current transmission resource, and feeds back the second HARQ feedback result on the second HARQ feedback resource corresponding to the current transmission resource. And the judgment rule may be as follows: for unicast and second type of multicast HARQ feedback modes, if the third terminal device 110C successfully receives data from the second terminal device 110B on the current transmission resource, feeding back HARQ ACK information on the second HARQ resource corresponding to the current transmission resource; feeding back HARQ NACK information if the third terminal device 110C does not successfully receive; if the third terminal device 110C does not detect the PSCCH on the current transmission resource, no HARQ feedback is performed. For the first type of multicast HARQ feedback mode, if the third terminal device 110C does not successfully receive, feeding back HARQ NACK information; if the third terminal device 110C successfully receives or does not detect the PSCCH, HARQ feedback is not performed.

Further, a time interval between a first transmission resource of the first number of transmission resources and a last transmission resource of the first number of transmission resources does not exceed 32 time slots.

In one possible example, the first number of transmission resources comprises a second number of transmission resources, wherein the second number of transmission resources is configured with one of the second number of first HARQ feedback resources after each transmission resource according to a one-to-one correspondence. It may be appreciated that there is a second number of transmission resources from the first number of transmission resources, and each of the second number of transmission resources is configured with one first HARQ feedback resource thereafter. For example, if the first SCI schedules three transmission resources and schedules one first HARQ feedback resource after each of the first transmission resource and the third transmission resource. At this time, the second number of transmission resources is the first transmission resource and the third transmission resource. If the first SCI schedules three transmission resources and schedules one HARQ feedback resource only after the last transmission resource. At this time, the second number of transmission resources is a third transmission resource.

In one possible example, when a second HARQ feedback resource corresponding to the current transmission resource exists between the current transmission resource and a next transmission resource of the current transmission resource, the current transmission resource carries a second SCI, and the second SCI is used to instruct the third terminal device 110C to perform a second HARQ feedback on the second HARQ feedback resource corresponding to the current transmission resource to the second terminal device 110B. It can be understood that if there is a second HARQ feedback resource corresponding to the current transmission between the current transmission and the next transmission, that is, the second HARQ feedback corresponding to the current transmission is before the next transmission resource, then the third terminal device 110C is instructed to perform HARQ feedback on the current transmission in the SCI of the current transmission.

In one possible example, in a case that the second HARQ feedback resource corresponding to the current transmission resource is after the next transmission resource of the current transmission resource, the transmission is directly performed on the next transmission resource of the current transmission resource after the transmission on the current transmission resource is completed. It can be understood that, if the time domain positions of two transmission resources (the previous and the next) are very close to each other and the second HARQ feedback resource corresponding to the previous transmission is after the next transmission, the next transmission is directly performed after the previous transmission is finished, and it is not necessary to perform HARQ feedback on the previous transmission to determine whether the next transmission is required.

Since the primary SCI issued by the first terminal device 110A may schedule one or more transmission resources for the same Transport Block (TB) and one or more first HARQ feedback resources for HARQ feedback for the second terminal device 110B, that is, the first number and the second number are integers greater than or equal to 1, the first SCI needs corresponding time-frequency domain position information indicating transmission resources and time-frequency domain position information indicating first HARQ feedback resources for different transmission resources and numbers of first HARQ feedback resources.

In one possible example, in case the second number is 1, the second number of first HARQ feedback resources is a single first HARQ feedback resource, the second number of transmission resources is a single transmission resource, and the single transmission resource is the last of the first number of transmission resources; the first SCI may include: a first Time interval indication field (Time gap 1), a first Frequency-domain index indication field (Frequency index 1), a first Time-domain resource indication field (Time indication field), a first Frequency-domain resource indication field (Frequency indication field), a second Time interval indication field (Time gap 2), and a second Frequency-domain index indication field (Frequency index 2). It can be appreciated that the first SCI schedules a plurality of transmission resources and one HARQ feedback resource and is configured with one first HARQ feedback resource after the last transmission resource of the plurality of transmission resources, and the second number of transmission resources is the last transmission resource of the plurality of transmission resources. Meanwhile, the resource indication field in the first SCI is used to indicate time-frequency domain location information of the resources.

TABLE 1

Wherein the first time interval indication field is used for indicating the time interval between the first SCI and the first transmission resource in the first quantity of transmission resources; the first frequency domain index indication field is used for indicating a frequency domain starting position of a first transmission resource in the first number of transmission resources, namely a data transmission sub-channel index (subchannel index); the first time domain resource indication field is used for indicating the time domain resource position of each transmission resource after the first transmission resource in the first quantity of transmission resources; the first frequency domain resource indication domain is used for indicating the frequency domain starting position of each transmission resource after the first transmission resource in the first quantity of transmission resources and the frequency domain size of all the transmission resources in the first quantity of transmission resources, the frequency domain size is used for indicating the number of data transmission sub-channels occupied by the transmission resources, and the frequency domain sizes of all the transmission resources are equal; the second time interval indication field is used for indicating the time interval between a second HARQ feedback resource corresponding to the single transmission resource and the single first HARQ feedback resource; the second frequency domain index indication field is used for indicating the frequency domain starting position of the single first HARQ feedback resource.

Specifically, the first time domain resource indication field is specifically configured to indicate time domain positions of all transmission resources, except the first transmission resource, in the first number of transmission resources in 31 time slots after the time slot in which the first transmission resource is located, and a bit number of the first time domain resource indication field is determined by a number L of the transmission resources indicated at most in one SCI configured by the higher layer signaling. Wherein, the L is the maximum number of transmission resources that can be indicated in one SCI, and the number of transmission resources indicated by each SCI is less than or equal to L. In addition, as shown in table 1, when L is 2, the bit number of the first time domain resource indicator field may be 5; when L is 3, the bit number of the first time domain resource indication domain is 9.

Specifically, the bit number of the first frequency domain resource indication field is determined by the maximum number L of transmission resources of one-time SCI configured by the high-level signaling and the number S of data transmission subchannels included in the group of resources acquired by the first terminal device 110A. The set of resources acquired by the first terminal device 110A may be the set of resources introduced in the resource allocation manner in the above mode2d, and the bit number of the first frequency domain resource indicator field may be as shown in table 1.

For example, please refer to fig. 2B. In the first SCI sent by the first terminal device 110A, the first terminal device 110A schedules two transmission resources for transmitting the current TB to the second terminal device 110B, and one first HARQ feedback resource is scheduled after the second transmission resource. The first terminal device 110A needs to explicitly indicate, in the SCI of the second transmission resource, that the third terminal device 110C needs to perform the second HARQ feedback on the second HARQ feedback resource corresponding to the current transmission resource, and finally the second terminal device 110B performs the first HARQ feedback on the first HARQ feedback resource after the scheduled second transmission. In addition, in the resource indication field in the first SCI, the first time interval indication field indicates the time interval (time interval 1 in the figure) between the first SCI and the first transmission resource, and the time domain position of the first transmission resource can be known in units of time slots; the first frequency domain index indication field indicates a frequency domain starting position of the first transmission resource; the first time domain resource indication field indicates which time slot of 31 time slots after the first transmission resource the second transmission resource is transmitted on, and the time domain position of the second transmission resource can be known; the first frequency domain resource indication domain indicates a frequency domain starting position of each transmission resource after a first transmission resource in the first number of transmission resources and frequency domain sizes of all transmission resources in the first number of transmission resources, the frequency domain sizes are used for representing the number of data transmission sub-channels occupied by the frequency domain, and the frequency domain sizes of all transmission resources are equal; the second time interval indication field indicates a time interval (time interval 2 in the figure) between the second HARQ feedback resource and the first HARQ feedback resource; the second frequency domain index indication field indicates a frequency domain starting position of the first HARQ feedback resource.

It can be seen that the first terminal device 110A schedules a plurality of transmission resources and one first HARQ feedback resource for the second terminal device 110B, and that the one first HARQ feedback resource is after the last transmission resource of the plurality of transmission resources. Since the first terminal device 110A schedules the first HARQ feedback resource to the second terminal device 110B, the second terminal device 110B performs the first HARQ feedback according to the first HARQ feedback resource after the last scheduled transmission resource. In addition, the time-frequency domain position information of the plurality of transmission resources and the time-frequency domain position information of one first HARQ feedback resource are indicated by a plurality of indication fields included in the SCI.

For the above example, the frequency domain starting position of the first HARQ feedback resource (indicated by the second frequency domain index indication field) and the frequency domain resource position information of each transmission resource following the first transmission resource (indicated by the first frequency domain resource indication field) may be jointly encoded together and indicated by the second frequency domain resource indication field. At this time, whether the first SCI schedules the first HARQ feedback resource may be determined by whether there is the second slot interval indication field. If the second time slot interval indication domain exists, the last frequency domain starting position indicated in the second frequency domain resource indication domain after the joint coding is the frequency domain starting position of the first HARQ feedback resource.

In one possible example, in case the second number is 1, the second number of first HARQ feedback resources is a single first HARQ feedback resource, the second number of transmission resources is a single transmission resource, and the single transmission resource is the last of the first number of transmission resources; the first SCI may include: the time domain resource allocation method comprises a first time interval indication domain, a first frequency domain index indication domain, a first time domain resource indication domain, a second frequency domain resource indication domain and a third time interval indication domain.

Wherein the first time interval indication field is used for indicating the time interval between the first SCI and the first transmission resource in the first quantity of transmission resources; the first frequency domain index indication field is used for indicating the frequency domain starting position of the first transmission resource in the first quantity of transmission resources; the first time domain resource indication field is used for indicating the time domain resource position of each transmission resource after the first transmission resource in the first quantity of transmission resources; the second frequency domain resource indication field is used for indicating the frequency domain starting position of each transmission resource after the first transmission resource in the first quantity of transmission resources, the frequency domain size of all the transmission resources in the first quantity of transmission resources and the frequency domain starting position of a single first HARQ feedback resource, and the frequency domain sizes of all the transmission resources are equal; the third time interval indication field is used for indicating the time interval between the second HARQ feedback resource corresponding to the single transmission resource and the single first HARQ feedback resource.

Specifically, the first time domain resource indication field is similar to the above example, and the number of bits of the first time domain resource indication field can be shown in table 1.

Specifically, the number of bits in the second frequency domain resource indication field is determined by the number L of transmission resources indicated at most in the primary SCI configured by the high-level signaling and the number S of data transmission subchannels included in the group of resources acquired by the first terminal device 110A. Wherein, when L is 2, the bit number of the second frequency domain resource indication field is calculated by the following formula:

and in the case that L is 3, the bit number of the second frequency domain resource indication field is calculated by the following formula:

the bit number required by the second frequency domain resource indication domain can be obtained by converting the two formulas into binary system and rounding up.

In the above example, only the last transmission resource in the transmission resources scheduled by the first terminal device 110A is followed by the first HARQ feedback resource, and if the current transmission resource is not the last transmission resource and the first data is successfully transmitted on the current transmission resource, that is, the third terminal device 110C feeds back the HARQ ACK information to the second terminal device 110B, the second terminal device 110B will not retransmit the first data on the subsequent transmission resource of the current transmission resource. Since there is no first HARQ feedback resource after the current transmission resource, the second terminal device 110B cannot perform HARQ feedback to the first terminal device 110A in time, and needs to wait for the first HARQ feedback resource after the last transmission resource to perform HARQ feedback to the first terminal device 110A. Although the second terminal device 110B can finally perform HARQ feedback to the first terminal device 110A through the first HARQ feedback resource, the first terminal device 110A cannot timely know that the second terminal device 110B cannot transmit data on the subsequent transmission resource of the current transmission resource, so that the subsequent resources are left empty, and the first terminal device 110A cannot timely recover the subsequent resources, which causes resource waste. For this purpose, a plurality of transmission resources and a plurality of first HARQ feedback resources scheduled by the first terminal device 110A may be considered, and one first HARQ feedback resource may be configured for any transmission resource of the plurality of transmission resources.

In one possible example, where the second number is greater than or equal to 1, each transmission resource of the second number of transmission resources is any one of the first number of transmission resources; the first SCI includes: the device comprises a first time interval indication domain, a first frequency domain index indication domain, a first time domain resource indication domain, a third frequency domain resource indication domain, a HARQ feedback resource number indication domain (HARQ feedback number indication), a plurality of time interval indication domains and a third frequency domain index indication domain. It can be appreciated that the first SCI schedules a plurality of transmission resources and one or more HARQ feedback resources, and is configured with one first HARQ feedback resource after any transmission resource of the plurality of transmission resources. Meanwhile, the resource indication field in the first SCI is used to indicate time-frequency domain location information of the resources.

Wherein the first time interval indication field is used for indicating the time interval between the first SCI and the first transmission resource in the first quantity of transmission resources; the first frequency domain index indication field is used for indicating the frequency domain starting position of a first transmission resource in the first quantity of transmission resources; the first time domain resource indication domain is used for indicating the time domain resource position of each transmission resource after the first transmission resource in the first quantity of transmission resources; the third frequency domain resource indication domain is used for indicating the frequency domain starting position of each transmission resource after the first transmission resource in the first quantity of transmission resources and the frequency domain size of all the transmission resources in the first quantity of transmission resources, the frequency domain size is used for indicating the number of data transmission sub-channels occupied by the transmission resources, and the frequency domain sizes of all the transmission resources are equal; the HARQ feedback resource quantity indication domain is used for indicating that the second quantity of transmission resources are configured with one first HARQ feedback resource in the second quantity of first HARQ feedback resources after each transmission resource according to a one-to-one corresponding relation; each of the plurality of time interval indication fields is configured to indicate a time interval between a second HARQ feedback resource corresponding to a first transmission resource of a second number of transmission resources and a first HARQ feedback resource configured after the first transmission resource, where the first transmission resource is any one of the second number of transmission resources; the third frequency domain index indication domain is used for indicating the frequency domain starting position of each first HARQ feedback resource in the second number of first HARQ feedback resources.

Specifically, the number of bits in the third frequency domain resource indication domain is determined by the number L of transmission resources indicated at most in one SCI configured by the higher layer signaling and the number S of data transmission subchannels included in a group of resources acquired by the first terminal device 110A. The number of bits of the third frequency domain resource indicator field can be shown in table 1.

Specifically, the bit number of the HARQ feedback resource number indication field may be determined by the number L of the transmission resources indicated at most in the primary SCI configured by the higher layer. Further, the bit number of the HARQ feedback resource quantity indication field may be L. For example, when L is 2, the bit number of the HARQ feedback resource quantity indication field is 2; when L is 3, the bit number of the HARQ feedback resource quantity indication field is 3.

Specifically, in order to reduce the overhead of the first SCI, the time interval indicated by each of the plurality of time interval indication fields may be equal, a fourth time interval indication field of the plurality of time interval indication fields is used to indicate an equal time interval, and the fourth time interval indication field is any one of the plurality of time interval indication fields. It is to be understood that, in the case where the indicated time intervals are equal, the plurality of time interval indication fields are one time interval indication, and the one time interval indication field is used to indicate the case where the time intervals are equal.

Specifically, the third frequency domain index indication domain indicates the frequency domain starting position of each first HARQ feedback resource scheduled by the first SCI through joint coding, and since the frequency domain size of each first HARQ feedback resource is fixed, no additional indication is needed. The bit number of the third frequency domain index indication domain is determined by the number L of transmission resources indicated at most in the primary SCI configured by the higher layer signaling and the number S of data transmission subchannels included in the group of resources acquired by the first terminal device 110A. When L is 2, the bit number of the third frequency domain index indicator domain is calculated by the following formula:

when L is 3, the number of bits in the third frequency domain index indicator domain is calculated by the following formula:

the bit number required by the third frequency domain index indication domain can be obtained by converting the formula into a binary system and rounding up.

For example, please refer to fig. 2C. In the first SCI delivered by the first terminal device 110A, the first terminal device 110A schedules two transmission resources for transmitting the first data to the second terminal device 110B, and schedules one first HARQ feedback resource after both the first transmission resource and the second transmission resource. The first terminal device 110A needs to explicitly indicate, in both SCIs of the first transmission resource and the second transmission resource, that the third terminal device 110C needs to perform the second HARQ feedback on the second HARQ feedback resource corresponding to the current transmission resource. If the first data is successfully transmitted on the first transmission resource, that is, the third terminal device 110C feeds back the HARQ ACK information to the second terminal device 110B on the second HARQ feedback resource corresponding to the first transmission resource, the second terminal device 110B does not retransmit the first data on the second transmission resource and does not perform the second HARQ feedback on the second HARQ feedback resource corresponding to the second transmission resource. Since one first HARQ feedback resource is configured after the first transmission resource, the second terminal device 110B can perform the first HARQ feedback to the first terminal device 110A through the first HARQ feedback resource in time. After receiving the HARQ ACK information, the first terminal device 110A recovers the second transmission resource to improve the utilization rate of the resource. If the first data is not successfully transmitted on the first transmission resource, that is, the third terminal device 110C feeds back HARQ NACK information to the second terminal device 110B on the second HARQ feedback resource corresponding to the first transmission resource, the second terminal device 110B needs to retransmit the first data on the second transmission resource, and send the HARQ NACK information to the first terminal device 110A. Finally, the second terminal device 110B obtains the second HARQ feedback result through the second HARQ feedback resource corresponding to the second transmission resource, and performs the first HARQ feedback to the first terminal device 110A through the first HARQ feedback resource configured thereafter.

In addition, in the resource indication field in the first SCI of fig. 2C, the first time interval indication field indicates the time interval (time interval 1 in the figure) between the first SCI and the first transmission resource, and the time domain position of the first transmission resource can be known in units of time slots; the first frequency domain index indication field indicates a frequency domain starting position of the first transmission resource; the first time domain resource indication field indicates which time slot of 31 time slots after the first transmission resource the second transmission resource is transmitted on, and the time domain position of the second transmission resource can be known; the third frequency domain resource indication domain indicates the frequency domain starting position of the second transmission resource and the frequency domain sizes of the first and second transmission resources, the frequency domain size is used for representing the number of data transmission sub-channels occupied by the transmission resources, and the frequency domain sizes of the first and second transmission resources are equal; the HARQ feedback resource quantity indication domain indicates that a first HARQ feedback resource is configured after a first transmission resource and a second transmission resource; one of the plurality of time interval indication fields indicates a time interval (time interval 2 in the figure) between a second HARQ feedback resource corresponding to a first transmission resource and a first HARQ feedback resource configured after the first transmission resource, and another of the plurality of time interval indication fields indicates a time interval (time interval 3 in the figure) between a second HARQ feedback resource corresponding to a second transmission resource and a first HARQ feedback resource configured after the second transmission resource, and if the time interval 2 and the time interval 3 are equal to reduce the overhead of the first SCI, the plurality of time interval indication fields are one time interval indication field indicating that the time intervals are equal; the third frequency domain index indication domain indicates respective frequency domain starting positions of the 2 first HARQ feedback resources.

It can be seen that, compared to the above example, the first terminal device 110A configures one first HARQ feedback resource after any of the plurality of transmission resources scheduled. If a first HARQ feedback resource is configured after the current transmission resource and the current transmission succeeds in transmitting the first data, that is, the third terminal device 110C feeds back HARQ ACK information to the second terminal device 110B, the second terminal device 110B may directly perform HARQ feedback to the first terminal device 110A through the first HARQ feedback resource after the current transmission. If the first HARQ feedback resource is not configured after the current transmission resource and the current transmission succeeds in transmitting the first data, the second terminal device 110B may also perform HARQ feedback on the first HARQ feedback resource after the current transmission. At this time, the first terminal device 110A knows that the second terminal device 110B will not perform retransmission on the subsequent transmission resources, and can recycle the subsequent resources for other scheduling, for example, scheduling for transmitting the second data by the second terminal device 110B or scheduling of other terminal devices.

In one possible example, the bearer channel of the first SCI may include one of: a stand-alone physical secondary link control channel (standby PSCCH), a data transmission single subchannel (PSCCH + psch single subchannel). It is understood that when the first terminal device 110A issues an SCI, the SCI may be carried by a standby PSCCH or PSCCH + psch single subchannel.

Specifically, the standby PSCCH occupies one slot in the time domain and a fixed number of RBs in the frequency domain, as shown in fig. 2D. In addition, the standby PSCCH carries only SCI, which is a special frequency domain size (size).

Specifically, compared with the normal transmission resources (including PSCCH and pscsch), the frequency domain granularity of which is one data transmission sub-channel, that is, the occupied frequency domain resources are several consecutive data transmission sub-channels, PSCCH + PSCCH single subchannel occupies one time slot in the time domain, and the frequency domain occupies one data transmission sub-channel, without an additional special structure (for example, a special frequency domain structure is required for a standby PSCCH, and the frequency domain occupies a plurality of fixed RBs and is different from the existing data transmission granularity), as shown in fig. 2D. Furthermore, the data transmission of PSCCH + PSCCH single subframe may include only the transmission of SCI on PSCCH, or both the transmission of SCI on PSCCH and the transmission of traffic data on PSCCH. The data transmission of PSCCH + PSCCH single subchannel is different from the normal data transmission occupying one data transmission subchannel: the data transmission of PSCCH + psch single subframe must carry SCI, but may not carry traffic data; there is a 1-bit (bit) indication field in the SCI of the PSCCH + psch single subchannel, and the 1-bit indication field is used to indicate that a single data transmission subchannel (single subchannel) is PSCCH + psch single subchannel, rather than occupying a normal data transmission of the data transmission subchannel.

In one possible example, the channel of the second number of first HARQ feedback resources may comprise one of: standalone PSCCH, PSCCH + PSCCH single subchannel. It can be understood that the channel for the second terminal device 110B to perform the first HARQ feedback to the first terminal device 110A may have a standby PSCCH or PSCCH + PSCCH single subchannel.

In one possible example, prior to S210, the second terminal device 110B may send first information to the first terminal device 110A, the first information requesting the first number of transmission resources and the second number of first HARQ feedback resources. Wherein the first information comprises one of: scheduling Request (SR), buffer Status Report (BSR).

Specifically, the possible ways for the second terminal device 110B to send the SR to the first terminal device 110A include: 1) Transmitting the SR using the PSFCH; 2) The SR is transmitted using either standalonpsch or PSCCH + psch single subframe.

It can be understood that, in the case that the second terminal device 110B sends the SR/BSR request resource to the first terminal device 110A, the first terminal device 110A issues a resource scheduling SCI, which may be a scheduling grant SCI (scheduling grant SCI) and may be carried by a standby PSCCH or PSCCH + psch single subframe. Then, the second terminal device 110B detects and decodes the SCI, and knows the scheduled resources of the first terminal device 110A.

S220, the second terminal device 110B receives the first SCI from the first terminal device 110A.

It can be seen that, in this embodiment, the first terminal device 110A issues an auxiliary link control message, and the second terminal device 110B can learn the resource scheduled to it by the first terminal device 110A by detecting and decoding the auxiliary link control message. Second terminal device 110B may perform secondary link transmission and second HARQ feedback with third terminal device 110C using the resource, and perform first HARQ feedback with first terminal device 110A according to the second HARQ feedback result. The time-frequency domain position information of the scheduled resources is indicated through the auxiliary link control information, so that the resource allocation mode that the terminal equipment schedules the resources for other terminal equipment is facilitated.

The above-mentioned scheme of the embodiment of the present application is introduced mainly from the perspective of interaction between network elements on the method side. It is understood that the terminal and the network device include corresponding hardware structures and/or software modules for performing the respective functions in order to implement the above-described functions. Those of skill in the art would readily appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as hardware or combinations of hardware and computer software. Whether a function is performed as hardware or computer software drives 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.

In the embodiment of the present application, the terminal and the network device may be divided according to the above method examples, for example, each functional unit may be divided corresponding to each function, or two or more functions may be integrated into one processing unit. The integrated unit may be implemented in the form of hardware, or may be implemented in the form of a software program module. It should be noted that the division of the unit in the embodiment of the present application is schematic, and is only a logic function division, and there may be another division manner in actual implementation.

In the case of an integrated unit, fig. 3 shows a block diagram of functional units of a resource indication apparatus for secondary link control information. The resource indication apparatus 300 for secondary link control information is applied to the first terminal device 110A, and specifically includes: a processing unit 302 and a communication unit 303. The processing unit 302 is used for controlling and managing the actions of the first terminal device 110A, e.g. the processing unit 302 is used for supporting the terminal to perform step 210 in fig. 2A and other processes for the techniques described herein. The communication unit 303 is configured to support communication between the first terminal device 110A and other devices. The resource indicating means 300 of the secondary link control information may further comprise a storage unit 301 for storing program codes and data of the resource indicating means 300 of the secondary link control information.

The Processing Unit 302 may be a Processor or a controller, and may be, for example, a Central Processing Unit (CPU), a general purpose Processor, a Digital Signal Processor (DSP), an Application-Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, a transistor logic device, a hardware component, or any combination thereof. Which may implement or perform the various illustrative logical blocks, modules, and circuits described in connection with the disclosure. The processor may also be a combination of computing functions, e.g., comprising one or more microprocessors, DSPs, and microprocessors, among others. The communication unit 303 may be a communication interface, a transceiver, a transceiving circuit, etc., and the storage unit 301 may be a memory. When the processing unit 302 is a processor, the communication unit 303 is a communication interface, and the storage unit 301 is a memory, the resource indication apparatus 300 for secondary link control information according to the embodiment of the present application may be the first terminal device shown in fig. 5.

In a specific implementation, the processing unit 302 is configured to perform any step performed by the terminal in the above method embodiment, and when performing data transmission such as sending, the communication unit 303 is optionally invoked to complete the corresponding operation. The details will be described below.

The processing unit 302 is configured to: and sending first auxiliary link control information (SCI) to second terminal equipment, wherein the first SCI is used for indicating a first number of transmission resources and a second number of first hybrid automatic repeat request (HARQ) feedback resources, the first number of transmission resources are used for data and SCI transmission between the second terminal equipment and third terminal equipment, the second number of first HARQ feedback resources are used for first HARQ feedback from the second terminal equipment to the first terminal equipment, a first HARQ feedback result carried on the second number of first HARQ feedback resources is determined according to a second HARQ feedback result, and the second HARQ feedback result is an HARQ feedback result of the third terminal equipment aiming at the data transmission condition of the second terminal equipment at the first number of transmission resources.

It can be seen that, in this embodiment, the first terminal device issues an auxiliary link control message, and the second terminal device can obtain the resource scheduled to the second terminal device by detecting and decoding the auxiliary link control message. The second terminal equipment can perform secondary link transmission and second HARQ feedback with the third terminal equipment by using the resource, and perform first HARQ feedback with the first terminal equipment according to the second HARQ feedback result. The time-frequency domain position information of the scheduled resources is indicated through the auxiliary link control information, so that the resource allocation mode that the terminal equipment schedules the resources for other terminal equipment is facilitated.

In one possible example, the first number of transmission resources includes a second number of transmission resources, and the second number of transmission resources is configured with one of the second number of first HARQ feedback resources after each transmission resource according to a one-to-one correspondence.

In one possible example, the first SCI includes a first time interval indication field, a first frequency domain index indication field, a first time domain resource indication field; wherein the first time interval indication field is used for indicating the time interval between the first SCI and the first transmission resource in the first quantity of transmission resources; the first frequency domain index indication field is used for indicating the frequency domain starting position of the first transmission resource in the first quantity of transmission resources; the first time domain resource indication field is for indicating a time domain resource location of each transmission resource subsequent to a first transmission resource of the first number of transmission resources.

In one possible example, in case that the second number is 1, the second number of first HARQ feedback resources is a single first HARQ feedback resource, the second number of transmission resources is a single transmission resource, and the single transmission resource is the last of the first number of transmission resources; the first SCI further includes: a first frequency domain resource indication domain, a second time interval indication domain and a second frequency domain index indication domain; the first frequency domain resource indication field is used for indicating the frequency domain starting position of each transmission resource after the first transmission resource in the first quantity of transmission resources and the frequency domain size of all the transmission resources in the first quantity of transmission resources, and the frequency domain sizes of all the transmission resources are equal; the second time interval indication field is used for indicating the time interval between a second HARQ feedback resource corresponding to the single transmission resource and the single first HARQ feedback resource; the second frequency domain index indication field is used for indicating the frequency domain starting position of the single first HARQ feedback resource.

In one possible example, in case that the second number is 1, the second number of first HARQ feedback resources is a single first HARQ feedback resource, the second number of transmission resources is a single transmission resource, and the single transmission resource is the last of the first number of transmission resources; the first SCI further includes: a second frequency domain resource indication field and a third time interval indication field; the second frequency domain resource indication field is used for indicating the frequency domain starting position of each transmission resource after the first transmission resource in the first number of transmission resources, the frequency domain size of all the transmission resources in the first number of transmission resources and the frequency domain starting position of a single first HARQ feedback resource, and the frequency domain sizes of all the transmission resources are equal; the third time interval indication field is used for indicating the time interval between the second HARQ feedback resource corresponding to the single transmission resource and the single first HARQ feedback resource.

In one possible example, the number of bits of the second frequency domain resource indication field is calculated by:

wherein, S represents the number of data transmission sub-channels included in a group of resources acquired by the first terminal device, L represents the number of transmission resources indicated at most in one SCI configured by the higher layer signaling, and the number of transmission resources indicated by the first SCI is less than or equal to L.

In one possible example, where the second number is greater than or equal to 1, each of the second number of transmission resources is any one of the first number of transmission resources; the first SCI further includes: a third frequency domain resource indication domain, a HARQ feedback resource quantity indication domain, a plurality of time interval indication domains and a third frequency domain index indication domain; the third frequency domain resource indication domain is used for indicating the frequency domain starting position of each transmission resource after the first transmission resource in the first number of transmission resources and the frequency domain size of all the transmission resources in the first number of transmission resources, and the frequency domain sizes of all the transmission resources are equal; the HARQ feedback resource quantity indication domain is used for indicating that the second quantity of transmission resources are configured with one first HARQ feedback resource in the second quantity of first HARQ feedback resources after each transmission resource according to a one-to-one corresponding relation; each of the plurality of time interval indication fields is configured to indicate a time interval between a second HARQ feedback resource corresponding to a first transmission resource of a second number of transmission resources and a first HARQ feedback resource configured after the first transmission resource, where the first transmission resource is any one of the second number of transmission resources; the third frequency domain index indication domain is used for indicating the frequency domain starting position of each first HARQ feedback resource in the second number of first HARQ feedback resources.

In one possible example, the bit number of the HARQ feedback resource quantity indication field is calculated by the number L of the transmission resources indicated at most in one SCI configured by the higher layer signaling, and the calculation result is equal to L.

In one possible example, each of the plurality of time interval indication fields indicates an equal time interval, a fourth time interval indication field of the plurality of time interval indication fields is used to indicate an equal time interval, and the fourth time interval indication field is any one of the plurality of time interval indication fields.

In one possible example, the number of bits of the third frequency domain index indication domain is calculated by:

the S represents the number of data transmission sub-channels included in a group of resources acquired by the first terminal device, the L represents the number of transmission resources indicated at most in one SCI configured by a high-level signaling, and the number of transmission resources indicated by the first SCI is smaller than or equal to the L.

In one possible example, the bearer channel of the first SCI includes one of: standalon PSCCH, PSCCH + psch single subchannel.

In one possible example, the channel of the second number of first HARQ feedback resources comprises one of: standalone PSCCH, PSCCH + PSCCH single subchannel.

In one possible example, the processing unit 302 is further configured to: receiving first information from a second terminal device, the first information being used to request the first number of transmission resources and the second number of first HARQ feedback resources.

In one possible example, the first information includes one of: scheduling request SR, buffer status report BSR.

Fig. 4 illustrates a block diagram of functional units of a resource indication apparatus for further secondary link control information, where an integrated unit is adopted. The resource indicating apparatus 400 of the secondary link control information is applied to the second terminal device 110B, and specifically includes: a processing unit 402 and a communication unit 403. Processing unit 402 is configured to control and manage actions of second terminal device 110B, e.g., processing unit 402 is configured to enable second terminal device 110B to perform step 220 in fig. 2A and/or other processes for the techniques described herein. The communication unit 403 is used to support communication between the network device and other devices. The resource indicating means 400 of secondary link control information may further comprise a storage unit 401 for storing program codes and data of the resource indicating means 400 of secondary link control information.

The Processing Unit 402 may be a Processor or a controller, such as a Central Processing Unit (CPU), a general-purpose Processor, a Digital Signal Processor (DSP), an Application-Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, a transistor logic device, a hardware component, or any combination thereof. Which may implement or perform the various illustrative logical blocks, modules, and circuits described in connection with the disclosure. The processor may also be a combination of computing functions, e.g., comprising one or more microprocessors, DSPs, and microprocessors, among others. The communication unit 403 may be a communication interface, a transceiver, a transceiving circuit, etc., and the storage unit 401 may be a memory. When the processing unit 402 is a processor, the communication unit 403 is a communication interface, and the storage unit 401 is a memory, the resource indication apparatus 400 of the secondary link control information according to the embodiment of the present application may be the second terminal device shown in fig. 6.

The processing unit 402 is configured to: receiving first auxiliary link control information (SCI) from a first terminal device, wherein the first SCI is used for indicating a first number of transmission resources and a second number of first hybrid automatic repeat request (HARQ) feedback resources, the first number of transmission resources are used for data and SCI transmission between a second terminal device and a third terminal device, the second number of first HARQ feedback resources are used for first HARQ feedback from the second terminal device to the first terminal device, a first HARQ feedback result carried on the second number of first HARQ feedback resources is determined according to a second HARQ feedback result, and the second HARQ feedback result is an HARQ feedback result of the third terminal device aiming at the data transmission condition of the second terminal device on the first number of transmission resources.

It can be seen that, in this embodiment, the first terminal device issues an auxiliary link control message, and the second terminal device can obtain the resource scheduled to the second terminal device by detecting and decoding the auxiliary link control message. The second terminal equipment can perform secondary link transmission and second HARQ feedback with the third terminal equipment by using the resource, and perform first HARQ feedback with the first terminal equipment according to the second HARQ feedback result. The time-frequency domain position information of the scheduled resource is indicated by the auxiliary link control information, so that the resource allocation mode that the terminal equipment schedules the resource for other terminal equipment is facilitated.

In one possible example, the first SCI includes a first time interval indication field, a first frequency domain index indication field, a first time domain resource indication field; wherein the first time interval indication field is used for indicating a time interval between the first SCI and a first transmission resource in the first number of transmission resources; the first frequency domain index indication field is used for indicating the frequency domain starting position of the first transmission resource in the first quantity of transmission resources; the first time domain resource indication field is for indicating a time domain resource location of each transmission resource subsequent to a first transmission resource of the first number of transmission resources.

In one possible example, where the second number is greater than or equal to 1, each transmission resource of the second number of transmission resources is any one of the first number of transmission resources; the first SCI further includes: a third frequency domain resource indication domain, an HARQ feedback resource quantity indication domain, a plurality of time interval indication domains and a third frequency domain index indication domain; the third frequency domain resource indication domain is used for indicating the frequency domain starting position of each transmission resource after the first transmission resource in the first number of transmission resources and the frequency domain size of all the transmission resources in the first number of transmission resources, and the frequency domain sizes of all the transmission resources are equal; the HARQ feedback resource quantity indication domain is used for indicating that the second quantity of transmission resources are configured with one first HARQ feedback resource in the second quantity of first HARQ feedback resources after each transmission resource according to a one-to-one corresponding relation; each of the plurality of time interval indication fields is configured to indicate a time interval between a second HARQ feedback resource corresponding to a first transmission resource of a second number of transmission resources and a first HARQ feedback resource configured after the first transmission resource, where the first transmission resource is any one of the second number of transmission resources; the third frequency domain index indication domain is used for indicating the frequency domain starting position of each first HARQ feedback resource in the second number of first HARQ feedback resources.

the S represents the number of data transmission sub-channels included in a group of resources acquired by the first terminal device, the L represents the number of transmission resources indicated at most in one SCI configured by a high-level signaling, and the number of transmission resources indicated by the first SCI is less than or equal to the L.

In one possible example, the bearer channel of the first SCI includes one of: standalone PSCCH, PSCCH + PSCCH single subchannel.

In one possible example, the processing unit 402 is further configured to: and sending first information to the first terminal equipment, wherein the first information is used for requesting a first number of transmission resources and a second number of first HARQ feedback resources.

In one possible example, the first information includes one of: scheduling request, buffer status report BSR.

Referring to fig. 5, fig. 5 is a schematic structural diagram of a first terminal device 500 according to an embodiment of the present disclosure, as shown in fig. 5. Wherein the first terminal device 500 comprises a processor 510, a memory 520, a communication interface 530 and at least one communication bus for connecting the processor 510, the memory 520, the communication interface 530.

The memory 520 includes, but is not limited to, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM), or a portable read-only memory (CD-ROM), and the memory 520 is used for related instructions and data.

Communication interface 530 is used to receive and transmit data.

The processor 510 may be one or more Central Processing Units (CPUs), and in the case that the processor 510 is one CPU, the CPU may be a single-core CPU or a multi-core CPU.

The processor 510 in the first terminal device 500 is configured to read one or more program codes 521 stored in the memory 520, and perform the following operations: and sending a first SCI to the second terminal device, where the first SCI is used to indicate a first number of transmission resources and a second number of first HARQ feedback resources, the first number of transmission resources is used for data and SCI transmission between the second terminal device and the third terminal device, the second number of first HARQ feedback resources is used for the second terminal device to perform first HARQ feedback to the first terminal device 500, a first HARQ feedback result carried on the second number of first HARQ feedback resources is determined according to a second HARQ feedback result, and the second HARQ feedback result is an HARQ feedback result of the third terminal device for a data transmission situation of the second terminal device on the first number of transmission resources.

It should be noted that, the implementation of each operation may also correspond to the corresponding description with reference to the method embodiment shown in fig. 2A, and the first terminal device 500 may be configured to execute the method at the terminal side of the foregoing method embodiment of the present application.

In the first terminal device 500 described in fig. 5, the first terminal device issues an auxiliary link control message, and the second terminal device can obtain the resource scheduled to the first terminal device by detecting and decoding the auxiliary link control message. The second terminal device can perform secondary link transmission and second HARQ feedback with a third terminal device by using the resource, and perform first HARQ feedback with the first terminal device according to a second HARQ feedback result. The time-frequency domain position information of the scheduled resource is indicated by the auxiliary link control information, so that the resource allocation mode that the terminal equipment schedules the resource for other terminal equipment is facilitated.

Referring to fig. 6, fig. 6 is a schematic structural diagram of a second terminal device 600 according to an embodiment of the present application, as shown in fig. 6. Wherein the second terminal device 600 comprises a processor 610, a memory 620, a communication interface 630 and at least one communication bus for connecting the processor 610, the memory 620 and the communication interface 630.

The memory 620 includes, but is not limited to, a random access memory, a read only memory, an erasable programmable read only memory, or a portable read only memory, and the memory 620 is used for related instructions and data.

The communication interface 630 is used for receiving and transmitting data.

The processor 610 may be one or more central processing units, and in the case where the processor 610 is one CPU, the CPU may be a single core CPU or a multi-core CPU.

The processor 610 in the second terminal device 600 is configured to read the one or more program codes 621 stored in the memory 620, and perform the following operations: receiving a first SCI from a first terminal device, where the first SCI is used to indicate a first number of transmission resources and a second number of first HARQ feedback resources, the first number of transmission resources is used for data and SCI transmission between a second terminal device and a third terminal device, the second number of first HARQ feedback resources is used for a first HARQ feedback from the second terminal device to the first terminal device, a first HARQ feedback result carried on the second number of first HARQ feedback resources is determined according to a second HARQ feedback result, and the second HARQ feedback result is an HARQ feedback result of the third terminal device for a data transmission situation of the second terminal device on the first number of transmission resources.

It should be noted that, implementation of each operation may also correspond to the corresponding description of the method embodiment shown in fig. 2A, and the second terminal device 600 may be configured to execute the method on the network device side in the foregoing method embodiment of the present application.

In the second terminal device 600 depicted in fig. 6, the first terminal device issues an auxiliary link control message, and the second terminal device can obtain the resource scheduled to the second terminal device by detecting and decoding the auxiliary link control message. The second terminal equipment can perform secondary link transmission and second HARQ feedback with the third terminal equipment by using the resource, and perform first HARQ feedback with the first terminal equipment according to the second HARQ feedback result. The time-frequency domain position information of the scheduled resources is indicated through the auxiliary link control information, so that the resource allocation mode that the terminal equipment schedules the resources for other terminal equipment is facilitated.

The embodiment of the present application further provides a chip, where the chip includes a processor, configured to call and run a computer program from a memory, so that a device in which the chip is installed performs some or all of the steps described in the terminal in the above method embodiment.

An embodiment of the present application further provides a computer-readable storage medium, where the computer-readable storage medium stores a computer program for electronic data exchange, where the computer program makes a computer perform some or all of the steps described in the terminal in the above method embodiment.

The embodiment of the present application further provides a computer-readable storage medium, where the computer-readable storage medium stores a computer program for electronic data exchange, where the computer program causes a computer to perform some or all of the steps described in the foregoing method embodiment by the network side device.

The present application further provides a computer program product, where the computer program product includes a computer program operable to make a computer perform some or all of the steps described in the terminal in the above method embodiments. The computer program product may be a software installation package.

The steps of a method or algorithm described in the embodiments of the present application may be implemented in hardware, or may be implemented by a processor executing software instructions. The software instructions may be comprised of corresponding software modules that may be stored in Random Access Memory (RAM), flash Memory, read Only Memory (ROM), erasable Programmable ROM (EPROM), electrically Erasable Programmable ROM (EEPROM), registers, a hard disk, a removable disk, a compact disc Read Only Memory (CD-ROM), or any other form of storage medium known in the art. 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 integral to the processor. The processor and the storage medium may reside in an ASIC. Additionally, the ASIC may reside in an access network device, a target network device, or a core network device. Of course, the processor and the storage medium may reside as discrete components in an access network device, a target network device, or a core network device.

Those skilled in the art will appreciate that in one or more of the examples described above, the functionality described in the embodiments of the present application may be implemented, in whole or in part, by software, hardware, firmware, or any combination thereof. When implemented in software, 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 loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the application to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions can 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 can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., floppy Disk, hard Disk, magnetic tape), an optical medium (e.g., digital Video Disk (DVD)), or a semiconductor medium (e.g., solid State Disk (SSD)), among others.

The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the embodiments of the present application in further detail, and it should be understood that the above-mentioned embodiments are only specific embodiments of the present application, and are not intended to limit the scope of the embodiments of the present application, and any modifications, equivalent substitutions, improvements and the like made on the basis of the technical solutions of the embodiments of the present application should be included in the scope of the embodiments of the present application.

Claims

1. A resource indication method of secondary link control information is applied to a first terminal device, and comprises the following steps:

in mode2d, sending first secondary link control information SCI to a second terminal device, where the first SCI is used to indicate a first number of transmission resources and a second number of first hybrid automatic repeat request HARQ feedback resources, where the first number of transmission resources are used for data and SCI transmission between the second terminal device and a third terminal device, the second number of first HARQ feedback resources are used for a first HARQ feedback from the second terminal device to the first terminal device, a first HARQ feedback result carried on the second number of first HARQ feedback resources is determined according to a second HARQ feedback result, and the second HARQ feedback result is an HARQ feedback result of the third terminal device for a data transmission condition of the second terminal device on the first number of transmission resources.

2. The method of claim 1, wherein the first number of transmission resources comprises a second number of transmission resources, and wherein the second number of transmission resources is configured with one of the second number of first HARQ feedback resources after each transmission resource according to a one-to-one correspondence.

3. The method of claim 2 wherein the first SCI includes a first time interval indication field, a first frequency domain index indication field, a first time domain resource indication field; wherein the content of the first and second substances,

the first time interval indication field is used for indicating the time interval between the first SCI and the first transmission resource in the first quantity of transmission resources;

the first frequency domain index indication field is used for indicating the frequency domain starting position of the first transmission resource in the first quantity of transmission resources;

the first time domain resource indication field is used to indicate a time domain resource location of each transmission resource after a first transmission resource of the first number of transmission resources.

4. The method according to claim 3, wherein in case the second number is 1, the second number of first HARQ feedback resources is a single first HARQ feedback resource, the second number of transmission resources is a single transmission resource, the single transmission resource is the last of the first number of transmission resources; the first SCI further includes: a first frequency domain resource indication domain, a second time interval indication domain and a second frequency domain index indication domain; wherein the content of the first and second substances,

the first frequency-domain resource indication field is configured to indicate a frequency-domain starting position of each transmission resource after a first transmission resource of the first number of transmission resources and frequency-domain sizes of all transmission resources of the first number of transmission resources, where the frequency-domain sizes of all transmission resources are equal;

the second time interval indication field is used for indicating the time interval between a second HARQ feedback resource corresponding to the single transmission resource and the single first HARQ feedback resource;

the second frequency domain index indication field is used for indicating a frequency domain starting position of the single first HARQ feedback resource.

5. The method according to claim 3, wherein in case the second number is 1, the second number of first HARQ feedback resources is a single first HARQ feedback resource, the second number of transmission resources is a single transmission resource, the single transmission resource is the last of the first number of transmission resources; the first SCI further includes: a second frequency domain resource indication field and a third time interval indication field; wherein the content of the first and second substances,

the second frequency-domain resource indication field is configured to indicate a frequency-domain starting position of each transmission resource after a first transmission resource of the first number of transmission resources, a frequency-domain size of all transmission resources of the first number of transmission resources, and a frequency-domain starting position of the single first HARQ feedback resource, where the frequency-domain sizes of all transmission resources are equal;

the third time interval indication field is used for indicating the time interval between the second HARQ feedback resource corresponding to the single transmission resource and the single first HARQ feedback resource.

6. The method of claim 5, wherein the number of bits of the second frequency-domain resource indication field is calculated by:

7. The method of claim 3, wherein each of the second number of transmission resources is any one of the first number of transmission resources if the second number is greater than or equal to 1; the first SCI further includes: a third frequency domain resource indication domain, a HARQ feedback resource quantity indication domain, a plurality of time interval indication domains and a third frequency domain index indication domain; wherein the content of the first and second substances,

the third frequency domain resource indication field is configured to indicate a frequency domain starting position of each transmission resource after a first transmission resource in the first number of transmission resources and frequency domain sizes of all transmission resources in the first number of transmission resources, where the frequency domain sizes of all transmission resources are equal;

the HARQ feedback resource quantity indication field is configured to indicate that the second number of transmission resources are configured with one of the second number of first HARQ feedback resources after each transmission resource according to a one-to-one correspondence relationship;

each of the plurality of time interval indication fields is configured to indicate a time interval between a second HARQ feedback resource corresponding to a first transmission resource of the second number of transmission resources and a first HARQ feedback resource configured after the first transmission resource, where the first transmission resource is any one of the second number of transmission resources;

the third frequency domain index indication domain is used for indicating the frequency domain starting position of each first HARQ feedback resource in the second number of first HARQ feedback resources.

8. The method of claim 7 wherein the bit number of the HARQ feedback resource number indication field is calculated by the number L of transmission resources indicated at most in one SCI configured by higher layer signaling, and the calculation result is equal to the L.

9. The method of claim 8, wherein each of the plurality of time interval indication fields indicates an equal time interval, and wherein a fourth time interval indication field of the plurality of time interval indication fields indicates the equal time interval, and wherein the fourth time interval indication field is any one of the plurality of time interval indication fields.

10. The method of claim 9, wherein the number of bits of the third frequency domain index indication domain is calculated by:

11. The method of any of claims 1-10, wherein the bearer channel of the first SCI comprises one of: a stand-alone secondary link control channel (STANDALONE PSCCH), and a data transmission single sub-channel (PSCCH + PSSCH single sub-channel).

12. The method of claim 11, wherein the channels of the second number of first HARQ feedback resources comprise one of: the standby PSCCH, the PSCCH + PSSCH single subchannel.

13. The method of claim 1, further comprising:

the first terminal device receives first information from the second terminal device, where the first information is used to request the first number of transmission resources and the second number of first HARQ feedback resources.

14. The method of claim 13, wherein the first information comprises one of: scheduling request SR, buffer status report BSR.

15. A resource indication method of secondary link control information is applied to a second terminal device, and comprises the following steps:

in mode2d, receiving a first SCI from a first terminal device, where the first SCI is used to indicate a first number of transmission resources and a second number of first HARQ feedback resources, where the first number of transmission resources is used for data and SCI transmission between a second terminal device and a third terminal device, the second number of first HARQ feedback resources is used for a first HARQ feedback from the second terminal device to the first terminal device, a first HARQ feedback result carried on the second number of first HARQ feedback resources is determined according to a second HARQ feedback result, and the second HARQ feedback result is an HARQ feedback result of the third terminal device for a data transmission situation of the second terminal device on the first number of transmission resources.

16. The method of claim 15, wherein the first number of transmission resources comprises a second number of transmission resources, and wherein the second number of transmission resources is configured with one of the second number of first HARQ feedback resources after each transmission resource in a one-to-one correspondence.

17. The method of claim 16, wherein the first SCI includes a first time interval indication field, a first frequency domain index indication field, a first time domain resource indication field; wherein, the first and the second end of the pipe are connected with each other,

18. The method according to claim 17, characterized in that in case the second number is 1, the second number of first HARQ feedback resources is a single first HARQ feedback resource, the second number of transmission resources is a single transmission resource, the single transmission resource is the last of the first number of transmission resources; the first SCI further includes: a first frequency domain resource indication domain, a second time interval indication domain and a second frequency domain index indication domain; wherein the content of the first and second substances,

19. The method according to claim 17, characterised in that in case the second number is 1, the second number of first HARQ feedback resources is a single first HARQ feedback resource, the second number of transmission resources is a single transmission resource, the single transmission resource is the last of the first number of transmission resources; the first SCI further includes: a second frequency domain resource indication field and a third time interval indication field; wherein the content of the first and second substances,

20. The method of claim 19, wherein the number of bits of the second frequency-domain resource indication field is calculated by:

21. The method of claim 17, wherein each of the second number of transmission resources is any one of the first number of transmission resources if the second number is greater than or equal to 1; the first SCI further includes: a third frequency domain resource indication domain, an HARQ feedback resource quantity indication domain, a plurality of time interval indication domains and a third frequency domain index indication domain; wherein the content of the first and second substances,

the third frequency domain index indication domain is used for indicating a frequency domain starting position of each first HARQ feedback resource in the second number of first HARQ feedback resources.

22. The method of claim 21 wherein the bit number of the HARQ feedback resource quantity indication field is calculated by the number L of transmission resources indicated at most in one SCI configured by higher layer signaling, and the calculation result is equal to L.

23. The method of claim 22, wherein each of the plurality of time interval indication fields indicates an equal time interval, and wherein a fourth time interval indication field of the plurality of time interval indication fields indicates the equal time interval, and wherein the fourth time interval indication field is any one of the plurality of time interval indication fields.

24. The method of claim 23, wherein the number of bits of the third frequency domain index indication domain is calculated by:

25. The method of any of claims 15-24, wherein the bearer channel of the first SCI comprises one of: a stand-alone secondary link control channel (STANDALONE PSCCH), and a data transmission single sub-channel (PSCCH + PSSCH single sub-channel).

26. The method of claim 25, wherein the channels of the second number of first HARQ feedback resources comprise one of: the standby PSCCH, the PSCCH + PSSCH single subchannel.

27. The method of claim 15, further comprising:

and sending first information to the first terminal equipment, wherein the first information is used for requesting the first quantity of transmission resources and the second quantity of first HARQ feedback resources.

28. The method of claim 27, wherein the first information comprises one of: scheduling request, buffer status report.

29. A resource indication apparatus of secondary link control information, applied to a first terminal device, the apparatus comprising a processing unit and a communication unit, wherein the processing unit is configured to:

in mode2d, sending, by the communications unit, first secondary link control information SCI to a second terminal device, where the first SCI is used to indicate a first number of transmission resources and a second number of first HARQ feedback resources, where the first number of transmission resources is used for data and SCI transmission between the second terminal device and a third terminal device, the second number of first HARQ feedback resources is used for a first HARQ feedback from the second terminal device to the first terminal device, a first HARQ feedback result carried on the second number of first HARQ feedback resources is determined according to a second HARQ feedback result, and the second HARQ feedback result is an HARQ feedback result of the third terminal device for a data transmission condition of the second terminal device on the first number of transmission resources.

30. The apparatus of claim 29, wherein the first number of transmission resources comprises a second number of transmission resources, and wherein the second number of transmission resources is configured with one of the second number of first HARQ feedback resources after each transmission resource according to a one-to-one correspondence.

31. The apparatus of claim 30 wherein the first SCI comprises a first time interval indication field, a first frequency domain index indication field, a first time domain resource indication field; wherein the content of the first and second substances,

the first time domain resource indication field is used for indicating a time domain resource position of each transmission resource after a first transmission resource in the first number of transmission resources.

32. The apparatus of claim 31, wherein in case the second number is 1, the second number of first HARQ feedback resources is a single first HARQ feedback resource, the second number of transmission resources is a single transmission resource, the single transmission resource is a last one of the first number of transmission resources; the first SCI further includes: a first frequency domain resource indication domain, a second time interval indication domain and a second frequency domain index indication domain; wherein the content of the first and second substances,

the first frequency-domain resource indication field is configured to indicate a frequency-domain starting position of each transmission resource after a first transmission resource in the first number of transmission resources and frequency-domain sizes of all transmission resources in the first number of transmission resources, where the frequency-domain sizes of all transmission resources are equal;

33. The apparatus of claim 31, wherein in case the second number is 1, the second number of first HARQ feedback resources is a single first HARQ feedback resource, the second number of transmission resources is a single transmission resource, the single transmission resource is a last one of the first number of transmission resources; the first SCI further comprises: a second frequency domain resource indication field and a third time interval indication field; wherein, the first and the second end of the pipe are connected with each other,

the second frequency domain resource indication field is configured to indicate a frequency domain starting position of each transmission resource after a first transmission resource in the first number of transmission resources, a frequency domain size of all transmission resources in the first number of transmission resources, and a frequency domain starting position of the single first HARQ feedback resource, where the frequency domain sizes of all transmission resources are equal, and a bit number of the second frequency domain resource indication field is obtained by the following calculation:

the S represents the number of data transmission sub-channels included in a group of resources acquired by the first terminal device, the L represents the number of transmission resources indicated at most in one SCI configured by a high-level signaling, and the number of transmission resources indicated by the first SCI is less than or equal to the L;

34. The apparatus of claim 31, wherein each of the second number of transmission resources is any one of the first number of transmission resources if the second number is greater than or equal to 1; the first SCI further includes: a third frequency domain resource indication domain, an HARQ feedback resource quantity indication domain, a plurality of time interval indication domains and a third frequency domain index indication domain; wherein the content of the first and second substances,

the HARQ feedback resource quantity indication field is configured to indicate that the second number of transmission resources are configured with one HARQ feedback resource of the second number of first HARQ feedback resources after each transmission resource according to a one-to-one correspondence relationship, a bit number of the HARQ feedback resource quantity indication field is obtained by calculating a number L of transmission resources indicated at most in one SCI configured by a high-level signaling, and a calculation result is equal to the L;

each of the multiple time interval indication domains is configured to indicate a time interval between a second HARQ feedback resource corresponding to a first transmission resource of the second number of transmission resources and a first HARQ feedback resource configured after the first transmission resource, where the first transmission resource is any one of the second number of transmission resources;

the third frequency domain index indication domain is used for indicating the frequency domain starting position of each first HARQ feedback resource in the second number of first HARQ feedback resources, and the bit number of the third frequency domain index indication domain is calculated by the following steps:

35. The apparatus of claim 34, wherein each of the plurality of time interval indication fields indicates an equal time interval, and wherein a fourth time interval indication field of the plurality of time interval indication fields indicates the equal time interval, and wherein the fourth time interval indication field is any one of the plurality of time interval indication fields.

36. A resource indication apparatus of secondary link control information, applied to a second terminal device, the apparatus comprising a processing unit and a communication unit, wherein the processing unit is configured to:

in mode2d, a first secondary link control information SCI from a first terminal device is received through the communication unit, where the first SCI is used to indicate a first number of transmission resources and a second number of first HARQ feedback resources, the first number of transmission resources is used for data and SCI transmission between the second terminal device and a third terminal device, the second number of first HARQ feedback resources is used for the second terminal device to perform first HARQ feedback to the first terminal device, a first HARQ feedback result carried on the second number of first HARQ feedback resources is determined according to a second HARQ feedback result, and the second HARQ feedback result is an HARQ feedback result of the third terminal device for a data transmission situation of the second terminal device on the first number of transmission resources.

37. The apparatus of claim 36, wherein the first number of transmission resources comprises a second number of transmission resources, and wherein the second number of transmission resources is configured with one of the second number of first HARQ feedback resources after each transmission resource according to a one-to-one correspondence.

38. The apparatus of claim 37 wherein the first SCI comprises a first time interval indication field, a first frequency domain index indication field, a first time domain resource indication field; wherein the content of the first and second substances,

the first frequency domain index indication field is used for indicating a frequency domain starting position of a first transmission resource in the first number of transmission resources;

39. The apparatus of claim 38, wherein in case the second number is 1, the second number of first HARQ feedback resources is a single first HARQ feedback resource, the second number of transmission resources is a single transmission resource, the single transmission resource is a last one of the first number of transmission resources; the first SCI further includes: a first frequency domain resource indication domain, a second time interval indication domain and a second frequency domain index indication domain; wherein the content of the first and second substances,

40. The apparatus of claim 38, wherein in case the second number is 1, the second number of first HARQ feedback resources is a single first HARQ feedback resource, the second number of transmission resources is a single transmission resource, the single transmission resource is a last one of the first number of transmission resources; the first SCI further includes: a second frequency domain resource indication field and a third time interval indication field; wherein the content of the first and second substances,

the S represents the number of data transmission subchannels included in a group of resources acquired by the first terminal device data transmission subchannel, the L represents the number of transmission resources indicated at most in one SCI configured by a high-level signaling, and the number of transmission resources indicated by the first SCI is less than or equal to the L;

41. The apparatus of claim 38, wherein each of the second number of transmission resources is any one of the first number of transmission resources if the second number is greater than or equal to 1; the first SCI further includes: a third frequency domain resource indication domain, a HARQ feedback resource quantity indication domain, a plurality of time interval indication domains and a third frequency domain index indication domain; wherein the content of the first and second substances,

the third frequency domain index indication domain is used for indicating the frequency domain starting position of each first HARQ feedback resource in the second number of first HARQ feedback resources, and the bit number of the third frequency domain index indication domain is obtained by the following calculation:

42. The apparatus as recited in claim 41, wherein each of said plurality of time interval indication fields indicates an equal time interval, wherein a fourth one of said plurality of time interval indication fields is configured to indicate said equal time interval, and wherein said fourth one is any one of said plurality of time interval indication fields.

43. A terminal device, which is a first terminal device, comprising a processor, a memory, a communication interface, and one or more programs stored in the memory and configured to be executed by the processor, the programs comprising instructions for performing the steps in the method of any of claims 1-14.

44. A terminal device that is a second terminal device comprising a processor, memory, a communication interface, and one or more programs stored in the memory and configured to be executed by the processor, the programs including instructions for performing the steps in the method of any of claims 15-28.

45. A chip, comprising: a processor for calling and running a computer program from a memory to cause a device on which the chip is installed to perform the method of any one of claims 1-14 or 15-28.

46. A computer-readable storage medium, characterized in that it stores a computer program for electronic data exchange, wherein the computer program causes a computer to perform the method according to any one of claims 1-14 or 15-28.