CN112584510B

CN112584510B - Communication method, apparatus and storage medium

Info

Publication number: CN112584510B
Application number: CN201910943945.XA
Authority: CN
Inventors: 杜逸凡; 薛祎凡; 才宇; 姚楚婷; 王洲; 王键; 徐海博
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2019-09-30
Filing date: 2019-09-30
Publication date: 2022-09-16
Anticipated expiration: 2039-09-30
Also published as: CN115633409A; CN112584510A; CN116321477A

Abstract

An embodiment of the application provides a communication method, a device and a storage medium, wherein the method comprises the following steps: the method comprises the steps that a first terminal device receives side link information sent by a second terminal device, wherein the side link information comprises at least one of side link service data and indication information of the side link service data; the first terminal equipment determines a first resource from a feedback resource set according to a repetition period N of the feedback resource set and the sidelink information, wherein the feedback resource set is used for transmitting the feedback information of the sidelink; n is an integer greater than 0; and the first terminal equipment sends feedback information to the second terminal equipment through the first resource, wherein the feedback information is used for indicating whether the side-link service data is correctly received by the first terminal equipment. The method of the embodiment of the application realizes the allocation of the resources occupied by the feedback information and sends the feedback information through the resources.

Description

Communication method, apparatus and storage medium

Technical Field

The present application relates to the field of communications technologies, and in particular, to a communication method, a device, and a storage medium.

Background

The 5G New Radio (5G NR) is a New issue proposed in 3GPP organization, and is located in release 14, and does not consider backward compatibility with a Long Term Evolution (LTE) communication system. As communication technology evolves, the internet of Everything is accelerating, 3GPP introduces support for Vehicle-to-Everything (V2X) service in LTE during releases 14 and 15, while NR V2X will supplement LTE V2X to implement advanced V2X service and support interworking with LTE V2X.

In the sidelink, data can be directly transmitted between two terminal devices without transmitting the data to the base station first, then transmitting the data to the terminal device at the receiving end through the forwarding of the core network, and the data delay can be greatly reduced.

However, in LTE, sidelink only defines the service mode of broadcasting, that is, one terminal device transmits a signal, regardless of which terminal devices can receive the signal, and regardless of whether the terminal device receiving the signal can successfully decode the signal.

Disclosure of Invention

Embodiments of the present application provide a communication method, device, and storage medium to implement allocation of resources occupied by feedback information and send the feedback information through the resources.

In a first aspect, a communication method is provided, including:

the method comprises the steps that a first terminal device receives side link information sent by a second terminal device, wherein the side link information comprises at least one of side link service data and indication information of the side link service data;

the first terminal equipment determines a first resource from a feedback resource set according to a repetition period N of the feedback resource set and the sidelink information, wherein the feedback resource set is used for transmitting the feedback information of the sidelink; n is an integer greater than 0;

the first terminal device sends feedback information to the second terminal device through the first resource, where the feedback information is used to indicate whether the sidelink service data is correctly received by the first terminal device.

In the implementation manner, allocation of the first resource occupied by the feedback information is realized, and the feedback information is sent through the resource without additional SCI overhead, that is, without indicating the position and size of the resource occupied by the PSFCH through the control information.

In one possible design, the determining, by the first terminal device, a first resource from a feedback resource set according to a repetition period N of the feedback resource set and the sidelink information includes:

the first terminal device divides the feedback resource set into N1 sub-resources according to the repetition period N of the feedback resource set, wherein frequency domain resource units occupied by any two sub-resources of the N1 sub-resources are different; n1 is an integer greater than 0;

the first terminal device determines the frequency domain resource of the first resource from the N1 sub-resources.

In the implementation manner, the allocation of the first resource occupied by the feedback information is implemented in a frequency division manner, and the feedback information is sent through the resource without additional SCI overhead, that is, without indicating the position and size of the resource occupied by the PSFCH through the control information.

In one possible design, the determining, by the first terminal device, the frequency domain resource of the first resource from the N1 sub-resources includes:

the first terminal equipment determines the position information of a second resource of the sidelink service data according to the sidelink information;

and the first terminal equipment determines the frequency domain resource of the first resource from the N1 sub-resources according to the position information of the second resource.

In one possible design, the method further includes:

the first terminal device divides any one of the N1 sub-resources into N2 sub-resources according to the repetition period N of the feedback resource set, wherein code domain parameters of any two of the N2 sub-resources are different; n2 is an integer greater than or equal to 1; the first terminal device determines the code domain resource of the first resource from the N2 sub-resources.

In the implementation manner, the allocation of the first resource occupied by the feedback information is implemented in a frequency division plus code division manner, and the feedback information is sent through the resource without additional SCI overhead, that is, without indicating the position and size of the resource occupied by the PSFCH through the control information.

In one possible design, the determining, by the first terminal device, a code domain resource of the first resource from the N2 sub-resources includes:

the first terminal equipment determines a first code domain parameter and a second code domain parameter according to at least one of the sequence length of the first resource and the repetition period N of the feedback resource set; the first code domain parameter is associated with the feedback information; the second code domain parameter is associated with a starting value of a code domain resource in the first resource;

and the first terminal equipment determines the code domain resource of the first resource from the N2 parts of sub-resources according to the first code domain parameter and the second code domain parameter.

In one possible design, the determining the first resource from the set of feedback resources includes:

if the sidelink information sent by the second terminal device occupies M1 time domain resource units, the first terminal device uses a third sub-resource included by M1 of the N1 sub-resources as the first resource, where the third sub-resource is a sub-resource corresponding to a time domain resource unit with a maximum or minimum time domain resource index value among the M1 sub-resources; or, the first terminal device uses the M1 sub-resources as the first resource, and each sub-resource in the M1 sub-resources is used for transmitting the same feedback information; m1 is an integer less than or equal to N1 and greater than 1; or the like, or, alternatively,

if the sidelink information sent by the second terminal device occupies L1 frequency domain resource sets, the first terminal device uses, as the first resource, a fourth sub-resource included in L1 sub-resources of the N1 sub-resources, where the fourth sub-resource is a sub-resource corresponding to a frequency domain resource set in the L1 sub-resources with a maximum or minimum frequency domain starting offset, and the frequency domain starting offset is an offset relative to a frequency domain starting value position of the L1 frequency domain resource sets; or, the first terminal device uses the L1 sub-resources as the first resource, and each sub-resource in the L1 sub-resources is used for transmitting the same feedback information; the set of frequency domain resources comprises at least one frequency domain resource unit; l1 is an integer greater than 1.

In this implementation manner, when the sidelink information occupies at least two time domain resource units or at least two frequency domain resource sets, how to select the resources of the PSFCH for feedback is implemented.

the first terminal device divides the feedback resource set into N3 sub-resources according to the repetition period N of the feedback resource set, wherein the code domain parameters of any two sub-resources of the N3 sub-resources are different; n3 is an integer greater than or equal to N;

the first terminal device determines the code domain resource of the first resource from the N3 sub-resources.

In this implementation, the allocation of the first resource occupied by the feedback information is implemented in a code division manner, and the feedback information is sent through the resource without additional SCI overhead, that is, without indicating the position and size of the resource occupied by the PSFCH through the control information.

In one possible design, the method further includes:

the first terminal device divides any one of the N3 sub-resources into a first sub-resource and a second sub-resource according to the information type included in the feedback information, wherein the frequency domain resource units occupied by the first sub-resource and the second sub-resource are different;

when the feedback information sent by the first terminal equipment indicates that the sidelink service data is not correctly received by the first terminal equipment, determining the frequency domain resource of the first resource from the first sub-resource;

and when the feedback information sent by the first terminal equipment indicates that the sidelink service data is correctly received by the first terminal equipment, determining the frequency domain resource of the first resource from the second sub-resource.

In this implementation manner, the allocation of the first resource occupied by the feedback information is implemented in a frequency division plus code division manner, where different feedback information is frequency-divided, and the feedback information is sent through the resource without additional SCI overhead, that is, without indicating the position and size of the resource occupied by the PSFCH through the control information.

if the sidelink information sent by the second terminal device occupies M2 time domain resource units, the first terminal device uses a fifth sub-resource included by M2 of the N3 sub-resources as the first resource, where the fifth sub-resource is a sub-resource corresponding to a time domain resource unit with a maximum or minimum time domain resource index value among the M2 sub-resources; or, the first terminal device uses the M2 sub-resources as the first resource, and each sub-resource in the M2 sub-resources is used for transmitting the same feedback information; m2 is an integer less than or equal to N3 and greater than 1; or the like, or, alternatively,

if the sidelink information sent by the second terminal device occupies L2 frequency domain resource sets, the first terminal device uses, as the first resource, a sixth sub-resource included in L2 sub-resources of the N3 sub-resources, where the sixth sub-resource is a sub-resource corresponding to a frequency domain resource set in the L2 sub-resources with a maximum or minimum frequency domain starting offset, and the frequency domain starting offset is an offset relative to a frequency domain starting value position of the L2 frequency domain resource sets; or, the first terminal device uses the L2 sub-resources as the first resource, and each sub-resource in the L2 sub-resources is used for transmitting the same feedback information; the set of frequency domain resources comprises at least one frequency domain resource unit; l2 is an integer greater than 1.

In a second aspect, a first terminal device is provided, which includes:

the receiving module is used for receiving the sidelink information sent by the second terminal equipment, and the sidelink information comprises at least one of sidelink service data and indication information of the sidelink service data;

the processing module is used for determining a first resource from a feedback resource set according to a repetition period N of the feedback resource set and the sidelink information, wherein the feedback resource set is used for transmitting the feedback information of the sidelink; n is an integer greater than 0;

a sending module, configured to send feedback information to the second terminal device through the first resource, where the feedback information is used to indicate whether the sidelink service data is correctly received by the first terminal device.

In a third aspect, a first terminal device is provided, which includes: a processor, a memory, a transceiver; the transceiver is coupled to the processor, and the processor controls the transceiving action of the transceiver;

wherein the memory is to store computer-executable program code, the program code comprising instructions; the instructions, when executed by the processor, cause the terminal device to perform the method as in any one of the first aspects or any possible implementation thereof.

In a fourth aspect, there is provided a computer readable storage medium having stored therein computer executable instructions for implementing a method as in any one of the first aspects or any possible implementation thereof when executed by a processor.

In a fifth aspect, there is provided a chip coupled with a memory for executing a computer program stored in the memory to perform the method as in any one of the first aspects or any possible implementation thereof.

A sixth aspect provides a processor, coupled to a memory, for performing the method of any of the above aspects or any possible implementation thereof.

In a seventh aspect, a computer program product containing instructions is provided, which when run on a computer causes the computer to perform the method of any of the above first aspects or any possible implementation thereof.

In an eighth aspect, there is provided a communication system comprising: the first terminal device and the second terminal device of any possible implementation manner of the second aspect or the third aspect.

According to the communication method, the communication device and the storage medium, the first terminal device receives sidelink information sent by the second terminal device, wherein the sidelink information comprises at least one of sidelink service data and indication information of the sidelink service data; the first terminal equipment determines a first resource from a feedback resource set according to the repetition period N of the feedback resource set and the side link information, wherein the feedback resource set is used for transmitting the feedback information of the side link; the first terminal device sends the feedback information to the second terminal device through the first resource, the feedback information is used for indicating whether the sidelink service data is correctly received by the first terminal device, the determination of the first resource occupied by the feedback information is realized, and the feedback information is sent through the resource without extra SCI overhead, namely without indicating the position and the size of the resource occupied by the PSFCH through the control information.

Drawings

Fig. 1 is a schematic diagram of an application scenario according to an embodiment of the present application;

FIGS. 2 a-2 f are schematic diagrams of further application scenarios of embodiments of the present application;

FIG. 3 is a schematic diagram of a resource pool according to an embodiment of the present application;

fig. 4 is a flow chart of a communication method according to an embodiment of the present application;

FIG. 5 is a flow chart of another method of communication according to an embodiment of the present application;

fig. 6 is a schematic diagram of resource allocation in a frequency division manner according to an embodiment of the present application;

fig. 7 is a schematic diagram of another resource allocation in a frequency division manner according to an embodiment of the present application;

fig. 8 is a schematic diagram of another resource allocation in a frequency division manner according to an embodiment of the present application;

fig. 9-10 are schematic diagrams illustrating another resource allocation in a frequency division manner according to an embodiment of the present application;

fig. 11-fig. 22 are schematic diagrams illustrating resource allocation in frequency division and code division manners according to an embodiment of the present application;

fig. 23-fig. 25 are schematic diagrams illustrating another resource allocation in a frequency division manner according to an embodiment of the present application;

fig. 26-29 are schematic diagrams illustrating resource allocation in a code division manner according to an embodiment of the present application;

fig. 30-35 are schematic diagrams illustrating another resource allocation in a code division manner according to an embodiment of the present application;

fig. 36 is a schematic structural diagram of a first terminal device according to an embodiment of the present application;

fig. 37 is a schematic structural diagram of another first terminal device according to an embodiment of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the embodiments of the present application will be described in further detail with reference to the accompanying drawings.

Hereinafter, some terms in the embodiments of the present application are explained to facilitate understanding by those skilled in the art.

1) Terminal equipment, including devices that provide voice and/or data connectivity to a user, may include, for example, handheld devices with wireless connection capability or processing devices connected to wireless modems. The terminal device may communicate with a core network via a Radio Access Network (RAN), exchanging voice and/or data with the RAN. The terminal device may include a User Equipment (UE), a wireless terminal device, a mobile terminal device, a subscriber unit (subscriber unit), a subscriber station (subscriber station), a mobile station (mobile), a remote station (remote station), an Access Point (AP), a remote terminal device (remote terminal), an access terminal device (access terminal), a user terminal device (user terminal), a user agent (user agent), a user equipment (user device), or the like. For example, mobile phones (or so-called "cellular" phones), computers with mobile terminal equipment, portable, pocket, hand-held, computer-included or vehicle-mounted mobile devices, smart wearable devices, and the like may be included. For example, Personal Communication Service (PCS) phones, cordless phones, Session Initiation Protocol (SIP) phones, Wireless Local Loop (WLL) stations, Personal Digital Assistants (PDAs), and the like. Also included are constrained devices, such as devices that consume less power, or devices that have limited storage capabilities, or devices that have limited computing capabilities, etc. Examples of information sensing devices include bar codes, Radio Frequency Identification (RFID), sensors, Global Positioning Systems (GPS), laser scanners, and the like. The terminal device of the embodiment of the present application may also be an on-board module, an on-board component, an on-board chip, or an on-board unit that is built in the vehicle as one or more components or units, and the vehicle may implement the method of the embodiment of the present application through the built-in on-board module, the built-in on-board component, the built-in on-board chip, or the built-in unit.

By way of example and not limitation, in the embodiments of the present application, the terminal device may also be a wearable device. Wearable equipment can also be called wearable intelligent equipment, is the general term of applying wearable technique to carry out intelligent design, develop the equipment that can dress to daily wearing, like glasses, gloves, wrist-watch, dress and shoes etc.. The wearable device may be worn directly on the body or may be a portable device integrated into the user's clothing or accessory. The wearable device is not only a hardware device, but also realizes powerful functions through software support, data interaction and cloud interaction. The generalized wearable smart device includes full functionality, large size, and can implement full or partial functionality without relying on a smart phone, such as: smart watches or smart glasses and the like, and only focus on a certain type of application functions, and need to be used in cooperation with other devices such as smart phones, such as various smart bracelets, smart helmets, smart jewelry and the like for monitoring physical signs.

2) Network devices, including, for example, Access Network (AN) devices, such as base stations (e.g., access points), may refer to devices in AN access network that communicate with wireless terminal devices over one or more cells over AN air interface, or, for example, network devices in one type of V2X technology are Road Side Units (RSUs). The base station may be configured to interconvert received air frames and Internet Protocol (IP) packets as a router between the terminal device and the rest of the access network, which may include an IP network. The RSU may be a fixed infrastructure entity supporting vehicle-to-anything (V2X) applications, which may exchange messages with other entities supporting V2X applications. The access network device may also coordinate attribute management for the air interface. For example, the access network device may include an evolved Node B (NodeB or eNB or e-NodeB) in an LTE system or an LTE-a (long term evolution-advanced), or may also include a next generation Node B (gNB) in a 5G NR system, or may also include a Centralized Unit (CU) and a Distributed Unit (DU) in a Cloud access network (Cloud RAN) system, which is not limited in the embodiments.

Of course, the network device may also include a core network device, but since the technical solution provided in the embodiment of the present application mainly relates to an access network device, hereinafter, unless otherwise specified, the "network device" described hereinafter refers to the access network device.

3) V2X, in version (Rel) -14/15/16, V2X has established itself as a major application of device-to-device (D2D) technology. The V2X optimizes the specific application requirements of V2X based on the existing D2D technology, and needs to further reduce the access delay of V2X devices and solve the problem of resource conflict.

V2X specifically includes several application requirements, such as vehicle-to-vehicle (V2V), vehicle-to-infrastructure (V2I), vehicle-to-pedestrian (V2P) direct communication, and vehicle-to-network (V2N) communication interaction. As shown in fig. 1. V2V refers to inter-vehicle communication; V2P refers to vehicle-to-person communication (including pedestrians, cyclists, drivers, or passengers); V2I refers to vehicle to network device communication, such as RSU, another V2N may be included in V2I, and V2N refers to vehicle to base station/network communication.

Among them, the RSU includes two types: the RSU of the terminal type is in a non-mobile state because the RSU is distributed on the roadside, and the mobility does not need to be considered; the RSU, being of the base station type, can provide timing synchronization and resource scheduling to the vehicle with which it communicates.

4) The terms "system" and "network" in the embodiments of the present application may be used interchangeably. "at least one" means one or more, "a plurality" means two or more. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone, wherein A and B can be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of the singular or plural items. For example, at least one (one) of a, b, or c, may represent: a, b, c, a-b, a-c, b-c, or a-b-c, wherein a, b, c may be single or multiple.

And, unless stated to the contrary, the embodiments of the present application refer to the ordinal numbers "first", "second", etc., for distinguishing between a plurality of objects, and do not limit the sequence, timing, priority or importance of the plurality of objects. For example, the first identifier and the second identifier are only used for distinguishing different identifiers, and do not indicate the difference of the content, priority, importance, or the like of the two identifiers.

Having described some of the concepts related to the embodiments of the present application, the following describes features of the embodiments of the present application.

With the development of wireless communication technology, there is an increasing demand for high data rate and user experience, and at the same time, there is an increasing demand for proximity services that understand and communicate with surrounding people or things, so device-to-device (D2D) technology has come into play. The application of the D2D technology can reduce the burden of the cellular network, reduce the battery power consumption of the user equipment, increase the data rate, and well meet the demand of the proximity service. The D2D technology allows multiple D2D capable terminal devices to directly discover and communicate directly with or without network infrastructure. In view of the characteristics and advantages of the D2D technology, a car networking application scenario based on the D2D technology is proposed, but due to safety concerns, the requirement on time delay in such a scenario is very high, and the existing D2D technology cannot achieve the goal.

Therefore, under the network of LTE technology proposed by the 3rd generation partnership project (3 GPP), V2X car networking technology is proposed. V2X communication refers to communication of the vehicle with anything outside, including V2V, V2P, V2I, and V2N.

The V2X communication is a basic technology and a key technology applied in a scene with a very high requirement on communication delay in the future, such as intelligent automobiles, automatic driving, intelligent transportation systems, and the like, for high-speed devices represented by vehicles. The LTE V2X communication may support communication scenarios with and without network coverage, and the resource allocation manner may adopt a network access device scheduling mode, such as an evolved universal terrestrial radio access network Node B (E-UTRAN Node B, eNB) scheduling mode and a user-selected mode. Based on the V2X technology, a vehicle user equipment (V-UE) can periodically or non-periodically transmit some information of itself, such as position, speed, intention (turning, merging or reversing, etc.), etc., to surrounding V-UEs, and similarly, a V-UE can receive information from surrounding V-UEs in real time. The 3GPP standards organization formally released the first generation LTE V2X standard, LTE Release 14, in the early 2017.

LTE V2X addresses some of the basic requirements of the V2X scenario, but for future fully intelligent driving, autonomous driving, etc. application scenarios, LTE V2X at present cannot be effectively supported. With the development of the 5G NR technology in the 3GPP standard organization, NR V2X will be further developed, for example, lower transmission delay, more reliable communication transmission, higher throughput, better user experience, etc. can be supported to meet the requirements of wider application scenarios.

The following describes a network architecture in a multicast scenario applied in the embodiment of the present application. Referring to fig. 2 a-2 f, a network architecture applied in the embodiment of the present application is shown.

Fig. 2 a-2 f comprise a network device 201, a first terminal device 202 (hereinafter referred to as first UE), and a second terminal device 203 (hereinafter referred to as second UE). The first UE and the first UE can communicate through sidelink. The sum of the first UE and the second UE may be a V2X terminal device, or a D2D terminal device, and the like, which is not limited specifically. It should be noted that the numbers of the first UE and the second UE in fig. 2a to 2f are only schematic illustrations, and in practical applications, the number of the first UE and the number of the second UE may be one or multiple. In practical application, the first UE may be a receiving end terminal device or a sending end terminal device, and the second UE may be a receiving end terminal device or a sending end terminal device.

The network devices in fig. 2 a-2 f may be access network devices, such as base stations, or may also be RSUs, etc., and the base stations are taken as examples in fig. 2 a-2 f. The access network device corresponds to different devices in different systems, for example, in a fourth generation mobile communication technology (the 4th generation, 4G) system, the access network is an Evolved universal terrestrial radio access network (E-UTRAN) (an Evolved Packet Core (EPC) for short), the access network device may be an eNB, and in a 5G system, the access network device corresponds to an access network device in 5G (a Core network may be 5GC), for example, a gbb. As shown in fig. 2 d-2 f, one of the two network devices may be a Master Node (MN) and one may be a Secondary Node (SN), for example, in fig. 2, the gbb is the Master Node and the eNB is the Secondary Node.

The terminal devices in fig. 2a to 2f are vehicle-mounted terminal devices or vehicles, but the terminal devices in the embodiments of the present application are not limited thereto.

Illustratively, a user sends a voice message via a second UE (e.g., a vehicle in fig. 2 a-2 f) to a first UE (e.g., another vehicle in fig. 2 a-2 f) via a sidelink. After receiving the voice message, the first UE replies feedback information to the second UE indicating whether the first UE correctly receives the voice message. Meanwhile, other vehicles may also communicate directly with the first UE and the second UE.

Illustratively, a user sends a voice message to a first UE (e.g., a first UE in another vehicle in fig. 2 a-2 f) via a sidelink via a second UE (e.g., a second UE in a vehicle in fig. 2 a-2 f). After receiving the voice message, the first UE replies feedback information to the second UE indicating whether the first UE correctly receives the voice message. Meanwhile, other vehicles may also communicate directly with the first UE and the second UE.

In one implementation, sidelink transmissions are resource pool based. As shown in fig. 3, a resource pool is a logical concept, and a resource pool includes a plurality of physical resources, where any one of the physical resources is used for transmitting data. When the UE performs data transmission, it needs to use one resource from the resource pool for transmission. This process of resource selection has two cases:

firstly, UE is controlled by network equipment, and selects a resource from a resource pool for data transmission according to the indication information of the network equipment;

secondly, the UE autonomously selects a resource from the resource pool to carry out data transmission.

The resource pool may include a plurality of time domain resource units, where the plurality of time domain resource units in the resource pool may be numbered consecutively in a time sequence, and the time domain resource unit is a symbol or a time slot.

The data transmitted by the UE may include at least one of sidelink traffic data, sidelink control information and sidelink feedback information. The Sidelink service data is carried on a Physical direct link Shared Channel (PSCCH), the Sidelink control information is carried on a Physical Sidelink Control Channel (PSCCH), and the Sidelink feedback information is carried on a Physical Sidelink feedback Physical feedback Channel (PSFCH). Hereinafter, the sidelink feedback information is mainly described as an example, and is simply referred to as feedback information.

In the unicast mode, if the decoding pscch is successful, the receiving end UE transmits a positive acknowledgement ACK, and if the decoding is unsuccessful, the receiving end UE transmits a negative acknowledgement NACK, and with reference to fig. 2a to 2f, in the unicast mode, the first UE 202 sends an ACK to the second UE 203 when the data decoding is successful, and sends a NACK to the second UE 203 when the data decoding is unsuccessful. Fig. 4 shows a communication flow between the first UE and the second UE, where the Sidelink Control Information (SCI) at least includes some scheduling indication information, parameters indicating data transmission, such as data rate and modulation order, and physical resource information occupied by data needed for implicitly calculating the PSFCH feedback resource, and the like. A/N is feedback information.

In one implementation, the PSFCH corresponding to a plurality of time domain units (e.g., time slots) multiplexes one feedback resource, i.e., a feedback resource set (e.g., a block of feedback resources indicated by an arrow in fig. 3).

In one resource pool, the PSFCH feedback resource set appears with a period N, where values of N are currently 1, 2, and 4, and N is illustrated as 2 in fig. 3. For a PSSCH that occurs in slot n, the corresponding PSFCH occurs in slot n + a, a being the smallest integer greater than or equal to K. K is an integer greater than or equal to 0, and assuming that K of all UEs in a resource pool is the same value, when the PSFCH feedback resource set occurs at period N, one or more PSFCHs corresponding to the PSSCHs need to share one PSFCH feedback resource set. In the following embodiments, the PSFCH format in which the PSSCH frequency domain is occupied by the frequency domain is described as an example. The psch frequency domain occupies a plurality of Physical Resource Blocks (PRBs), which are hereinafter referred to as frequency resource units, and the frequency domain is in units of sub-channels, which are referred to as a frequency domain resource set in the following embodiments (for example, a vertical lattice in fig. 3 represents one sub-channel), and the size of one sub-channel may take 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 25, 30, 48, 50, 72, 75, 96, and 100 PRBs according to the definition in the LTE protocol. One UE may occupy more than one slot, for example, the location of UE2 in fig. 3 may also be the psch transmitted by UE 1. In the following description of the embodiments, for clarity, different UEs are also drawn to multiplex one feedback resource, but each PSFCH is actually slot-differentiated, that is, the PSFCH corresponding to the PSSCH in each slot demultiplexes one feedback resource. A PSFCH refers to a PSFCH mapped to a time-domain, frequency-domain, code-domain resource, and is described in the following embodiments.

In an implementation manner, the sequence of the PSFCH is based on the PUCCH format 0, and with reference to the sequence of the PUCCH format 0, the sequences of different cyclic shifts are orthogonal to each other, so that the sequence code can occupy the same time-frequency resource by means of different cyclic shifts. The formula for cyclic shift is as follows:

wherein the first code domain parameter m _cs Associated with the feedback information, it may be distinguished, for example, whether it is NACK or ACK; second code domain parameter m ₀ Associated with a starting value of a code domain resource in the first resource. Other parameters in the above formula may be known in advance.

In one implementation, the following parameters or information may be known to the first UE in advance, for example:

the period N of the PSFCH occurring in the resource pool (referred to as a repetition period in the following embodiments) may be slot, and currently, possible values are 1, 2, and 4. N is (pre) configured or indicated.

For a PSSCH that occurs in slot n, the corresponding PSFCH occurs in slot n + a, a is the smallest integer greater than or equal to K, the size of a or K is determined by the processing capability of the UE, and K may be the same for all UEs in the resource pool.

The frequency domain size of a block of PSFCH feedback resources (i.e., a feedback resource set) is N _ PRB PRBs, which are included in the PSSCH frequency domain. The number of PRBs occupied by the PSSCH can be calculated by L _ subCH × n _ subCH or obtained in other ways, wherein L _ subCH is the number of sub-channels occupied by the PSSCH, and n _ subCH is the number of PRBs occupied by one sub-channel, and is a (pre-) configured parameter. The size Nsc of one PRB is 12.

The frequency domain starting position of a block of PSSCH resources is given by the SCI.

The frequency domain starting position of the PSFCH feedback resource is (pre-) configured.

Some information in the calculation of the cyclic shift alpha of the sequence, such as n _cs ，n _cs Determined by the time domain location of the PSFCH and cell information when the UE is within the cell coverage, or preconfigured parameters when the UE is not within the cell coverage, etc.

The first UE may determine the resources to send the feedback information based on the above parameters or information.

In the following embodiment, N2 and N _ PRB 5, which is the number of PRBs included in the feedback resource set, are taken as examples for explanation.

The technical solution provided by the embodiments of the present application is described below with reference to the accompanying drawings.

An embodiment of the present application provides a communication method, please refer to fig. 5, where the method of the present embodiment includes:

step 101, the first terminal device receives side link information sent from the second terminal device, where the side link information includes at least one of side link service data and indication information of the side link service data.

In one implementation, as shown in fig. 4 and 5, the first UE receives at least one of the sidelink traffic data and indication information (e.g., SCI in fig. 4) of the sidelink traffic data transmitted by the second UE.

Step 102, the first terminal device determines a first resource from a feedback resource set according to a repetition period N of the feedback resource set and the sidelink information, wherein the feedback resource set is used for transmitting the feedback information of the sidelink; n is an integer greater than 0;

the feedback information includes, for example, ACK or NACK. For example, the sidelink information of the second UE (e.g., UE1) occupies multiple slots, and in one implementation, the resource occupied by UE2 in fig. 3 may be the resource occupied by the sidelink information of UE 1.

In one implementation, a second UE (e.g., UE1) occupies a common feedback resource with UE2 in fig. 3, and a first resource of the second UE, e.g., UE1, needs to be determined from the set of feedback resources. Specific embodiments can be found in the following examples.

Step 103, the first terminal device sends feedback information to the second terminal device through the first resource, where the feedback information is used to indicate whether the sidelink service data is correctly received by the first terminal device.

In one implementation, a first UE sends feedback information to a second UE through a first resource, where the feedback information is used to indicate whether sidelink service data is correctly received by the first UE.

In the method of this embodiment, a first terminal device receives sidelink information sent from a second terminal device, where the sidelink information includes at least one of sidelink service data and indication information of the sidelink service data; the first terminal equipment determines a first resource from a feedback resource set according to the repetition period N of the feedback resource set and the side link information, wherein the feedback resource set is used for transmitting the feedback information of the side link; the first terminal device sends the feedback information to the second terminal device through the first resource, and the feedback information is used for indicating whether the sidelink service data is correctly received by the first terminal device, so that the determination of the first resource occupied by the feedback information is realized, and no extra SCI (communication interface element) overhead is needed, namely, the position and the size of the resource occupied by the PSFCH do not need to be indicated through the control information.

On the basis of the above embodiment, step 102 can be implemented by the following several ways:

one implementation a:

the first terminal device divides the feedback resource set into N1 parts of sub-resources according to the repetition period N of the feedback resource set, and the frequency domain resource units occupied by any two parts of the N1 parts of sub-resources are different; n1 is an integer greater than 0;

In an embodiment, the above "dividing the feedback resource set into N1 sub-resources" may be implemented by:

the first terminal device determines the offset of each sub-resource in the N1 parts of sub-resources relative to the initial position of the feedback resource set according to the repetition period N of the feedback resource set and the number of frequency domain resource units occupied by the frequency domain resources of the feedback resource set;

and the first terminal equipment divides the frequency domain resources of the feedback resource set into N1 parts of sub-resources according to the offset of each sub-resource in the N1 parts of sub-resources relative to the starting position of the feedback resource set.

In one implementation, each of the N1 sub-resources occupies

Frequency domain resource occupation of one PRB, i.e. the first resource

A PRB.

If the feedback information is sent by using a long sequence, the sequence length L of the first resource is

Length of one PRB, i.e.

If the feedback information is sent by using a short sequence, the sequence length of the first resource is smaller than the total length of the PRBs occupied by the frequency domain resources of the first resource, which may be, for example, the length Nsc of one PRB, and the repetition is performed

Secondly;

the frequency domain resource of the ith first resource occupies the frequency of the (i + 1) th sub-resource in the N1Domain resource, offset

The value of i is 0-N-1.

The long sequence is the total length of the PRB occupied by the frequency domain resource of the first resource.

Illustratively, as shown in fig. 6, a first UE receives data transmitted by a plurality of second UEs (e.g., UE1 and UE2), divides a feedback resource set (including 5 PRBs) into N1, where N1 is 2, for example, and determines a frequency domain resource of a first resource corresponding to UE1 from N1 sub-resources.

The first resource (1 st sub-resource) of the UE1 occupies 2 PRBs, the first resource (2 nd sub-resource) of the UE2 occupies 2 PRBs, and the 5 th PRB is empty. The PRB _ offset of the first resource of the UE1 is 0, and the PRB _ offset of the first resource of the UE2 is 2.

In another implementation, the first N1-1 of the N1 sub-resources occupy

PRB, N1 th sub-resource

A PRB;

for the first N1-1 sub-resources, if a long sequence is used to send feedback information, the sequence length of the first resource is

The length of each PRB; if the feedback information is sent by adopting a short sequence, the sequence length of the first resource is the length of one PRB, and the steps are repeated

Secondly;

for the N1 th sub-resource, ifSending feedback information by adopting a long sequence, wherein the sequence length of the first resource is

The length of each PRB; if the feedback information is sent by adopting a short sequence, the sequence length of the first resource is the length of one PRB, and the process is repeated

Next, the process is carried out.

The frequency domain resource of the ith first resource occupies the frequency domain resource of the (i + 1) th sub-resource and the offset

In this implementation, the frequency domain resources of the feedback resource set may be fully utilized.

Illustratively, as shown in fig. 7, a first UE receives data transmitted by a plurality of second UEs (e.g., UE1 and UE2), divides a feedback resource set (including 5 PRBs) into N1, where N1 is 2, for example, determines a frequency domain resource of a first resource corresponding to UE1 and a frequency domain resource of a first resource corresponding to UE2 from N1 sub-resources.

The first resource (1 st sub-resource) of the UE1 occupies two PRBs, and the first resource (2 nd sub-resource) of the UE2 occupies three PRBs. The PRB _ offset of the first resource of the UE1 is 0, and PRB _ offset of the first resource of the UE2 is 2.

In yet another implementation, the 1 st sub-resource occupies the N1 sub-resources

One PRB and the rest N1-1 parts of sub resources

A PRB;

for the 1 st sub-resource, if a long sequence is used to send feedback information, the sequence length of the first resource is

Next, the process is carried out. The frequency domain resource of the first resource occupies the frequency domain resource of the (i + 1) th sub-resource, and the offset

For the rest N1-1 sub-resources, if a long sequence is used to send feedback information, the sequence length of the first resource is

Next, the process is carried out. The frequency domain resource of the ith first resource occupies the frequency domain resource of the (i + 1) th sub-resource and the offset

Illustratively, as shown in fig. 8, a first UE receives data transmitted by a plurality of second UEs (e.g., UE1 and UE2), divides a feedback resource set (including 5 PRBs) into N1, where N1 is 2, for example, determines a frequency domain resource of a first resource corresponding to UE1 and a frequency domain resource of a first resource corresponding to UE2 from N1 sub-resources.

The first resource (the 1 st sub-resource) of UE1 occupies 3 PRBs, and the first resource (the 2 nd sub-resource) of UE2 occupies 2 PRBs.

Further, after dividing the N1 parts of sub-resources, the step "the first terminal device determines the frequency domain resource of the first resource from the N1 parts of sub-resources" may be implemented by:

and the first terminal equipment determines the frequency domain resource of the first resource from the N1 parts of sub resources according to the position information of the second resource.

In an embodiment, the location information of the second resource comprises a time domain resource index value.

In one implementation, the resource index i of the first resource is calculated as slot _ index% N according to an index value slot _ index (i.e., a time domain resource index value) of a slot where the PSSCH corresponding to the first resource is located. slot _ index is a parameter that the UE acquires in advance.

In another implementation, in addition to the slot _ index of the PSSCH corresponding to the current second UE itself, the first UE also knows the slot _ index of the PSSCH that shares one PSFCH feedback resource with the current second UE. And the first UE corresponds the numerical values of all the slot _ indexes to the set {0, …, N-1} of i in a one-to-one order from small to large so as to obtain i of the current second UE. For example, in fig. 6-8, i is 0 for UE1 and 1 for UE 2.

Further, the method further comprises:

and the first terminal equipment determines the code domain resource of the first resource according to the feedback information.

Wherein the first code domain parameter is associated with the feedback information, and the second code domain parameter is associated with a starting value of a code domain resource in the first resource.

Since the foregoing scheme implements the differentiation of PSFCH resources in a frequency division manner, the second code domain parameter m ₀ May be a preset fixed value, such as 0. First code domain parameter m when transmitting NACK _cs 0, the first code domain parameter m when transmitting ACK _cs L/2. L is the sequence length used by the first resource.

In some implementations described above, the frequency domain resources of the first resources include: and adopting frequency domain resource units continuously occupied by long sequences or short sequences.

In several implementations, the frequency domain resources of the first resource include: and adopting frequency domain resource units discontinuously occupied by the short sequences.

In one implementation, N1 sub-resourcesEach sub-resource is not contiguous, as shown in fig. 9, for example, N1 is 2, the first resource uses short-sequence non-contiguous occupied-frequency-domain resource units, the offset PRB _ offset of the ith first resource is i,

illustratively, as shown in fig. 9, a first UE receives data transmitted by a plurality of second UEs (e.g., UE1 and UE2), divides a feedback resource set (including 5 PRBs) into N1, where N1 is 2, for example, determines a frequency domain resource of a first resource corresponding to UE1 and a frequency domain resource of a first resource corresponding to UE2 from N1 sub-resources.

The first resource (1 st sub-resource) of the UE1 occupies 2 PRBs, the 2 PRBs are discontinuous, the first resource (2 nd sub-resource) of the UE2 occupies 2 PRBs, the 2 PRBs are discontinuous, and the 5 th PRB is empty. The PRB _ offset of the first resource of the UE1 is 0, 2, and the PRB _ offset of the first resource of the UE2 is 1, 3.

In another implementation, each of the N1 sub-resources is discontinuous, as shown in fig. 10, for example, N1 is 2, the first resource uses short-sequence discontinuous occupied frequency domain resource units, and the first N _ PRB% N first resources, i.e., i<N _ PRB% N, the offset PRB _ offset is i,

when i is greater than or equal to N _ PRB% N, the PRB _ offset is i,

illustratively, as shown in fig. 10, a first UE receives data transmitted by a plurality of second UEs (e.g., UE1 and UE2), divides a feedback resource set (including 5 PRBs) into N1, where N1 is 2, for example, determines a frequency domain resource of a first resource corresponding to UE1 and a frequency domain resource of a first resource corresponding to UE2 from N1 sub-resources.

The first resource (the 1 st sub-resource) of UE1 occupies 3 PRBs, the 3 PRBs are discontinuous, and the first resource (the 2 nd sub-resource) of UE2 occupies 2 PRBs, the 2 PRBs are discontinuous. The PRB _ offsets of the first resource of the UE1 are 0, 2, and 4, and PRB _ offset of the first resource of the UE2 is 1, 3.

Wherein the second code domain parameter m ₀ May be a preset fixed value, such as 0. First code domain parameter m when transmitting NACK _cs 0, the first code domain parameter m when transmitting ACK _cs L/2. Since the above uses short sequences, L is the PRB length, 12.

On the basis of the implementation manner a, further, the following operations may be further performed:

the first terminal equipment divides any one of the N1 sub-resources into N2 sub-resources according to the repetition period N of the feedback resource set, and the code domain parameters of any two of the N2 sub-resources are different; n2 is an integer greater than or equal to 1;

the first terminal device determines the code domain resource of the first resource from the N2 sub-resources.

In practical applications, the step "the first terminal device determines the code domain resource of the first resource from the N2 sub-resources" may include:

the first terminal equipment determines a first code domain parameter and a second code domain parameter according to at least one of the sequence length of the first resource and the repetition period N of the feedback resource set; the first code domain parameter is associated with feedback information; the second code domain parameter is associated with a starting value of a code domain resource in the first resource;

Wherein, N1 parts of sub-resources are frequency division, and N2 parts of sub-resources are code division.

In one implementation, N1 is

In one implementation form f1, each of the N1 sub-resources occupies one sub-resource

Frequency domain resource occupation of one PRB, i.e. the first resource

A PRB.

Length of one PRB, i.e.

Secondly;

the frequency domain resource of the ith first resource occupies the frequency domain resource of the (i + 1) th sub-resource in the N1, and the offset is

i has a value of 0 to

In one implementation f2, the first N1-1 of the N1 sub-resources occupy

PRB, N1 th sub-resource

A PRB;

for the first N1-1 sub-resources, if long sequences are used to send feedback information, the sequence length of the first resource is

Secondly;

for the N1 th sub-resource, if a long sequence is used to send feedback information, the sequence length of the first resource is

Next, the process is carried out.

i has a value of 0 to

In one implementation form f3, the 1 st sub-resource of the N1 sub-resources occupies

One PRB and the rest N1-1 parts of sub resources

A PRB;

for 1 st son assetFor the source, if the feedback information is sent by using a long sequence, the sequence length of the first resource is

Next, the process is carried out. i equals 0, the frequency domain resource of the first resource occupies the frequency domain resource of the i +1 st sub-resource, and the offset PRB _ offset equals 0.

For the rest N1-1 sub resources, if long sequence is used to send feedback information, the length of the sequence of the first resource is

In one implementation, the second code domain parameter m is guaranteed first ₀ At intervals, the first code field parameter m is guaranteed _cs Spacing: i is 0 to

m ₀ ＝0；

To N-1, m ₀ 2L/N. M when the feedback information is NACK _cs When the feedback information is ACK, m is 0 _cs ＝L/N。

If N is 4, i is 0, 1m ₀ ＝0；i＝2，3m ₀ When the feedback information is NACK m ═ L/2 _cs Feedback of 0M when the information is ACK _cs ＝L/4。

For example, as shown in fig. 11 and fig. 12, on the basis of the implementation f1, the feedback resource set (including 5 PRBs) is divided into N1 subsets of sub-resources, N1 is, for example, 2, and each of the N1 subsets of sub-resources includes different frequency domain resources. The N1 sub-resources are divided into N2 sub-resources, N2 is, for example, 2, and the code domain parameters of the sub-resources in the N2 sub-resources are different.

The first resource (1 st sub-resource) of the UE1 occupies 2 PRBs, the first resource (2 nd sub-resource) of the UE2 occupies 2 PRBs, the first resource (1 st sub-resource) of the UE3 occupies 2 PRBs, the first resource (2 nd sub-resource) of the UE4 occupies 2 PRBs, and the 5 th PRB is empty. The PRB _ offset of the 1 st sub-resource is 0, and PRB _ offset of the 2 nd sub-resource is 2.

Fig. 11 shows that feedback information is transmitted using a long sequence, L is the length of 2 PRBs, 24, and in fig. 11, i is 0, 1m ₀ ＝0；i＝2，3m ₀ 12; m when the feedback information is NACK _cs When the feedback information is ACK, m is 0 _cs ＝6。

Fig. 12 shows that feedback information is transmitted using a short sequence, L is the length of 1 PRB, 12, and i is 0, 1m in fig. 12 ₀ ＝0；i＝2，3m ₀ 6; m when the feedback information is NACK _cs When the feedback information is ACK, m is 0 _cs ＝3。

Exemplarily, as shown in fig. 13 and fig. 14, on the basis of the implementation f2, the feedback resource set (including 5 PRBs) is divided into N1 sub-resources, N1 is, for example, 2, and each of the N1 sub-resources includes different frequency domain resources. The N1 sub-resources are divided into N2 sub-resources, N2 is, for example, 2, and the code domain parameters of the sub-resources in the N2 sub-resources are different.

The first resource (1 st sub-resource) of the UE1 occupies 2 PRBs, the first resource (2 nd sub-resource) of the UE2 occupies 3 PRBs, the first resource (1 st sub-resource) of the UE3 occupies 2 PRBs, and the first resource (2 nd sub-resource) of the UE4 occupies 3 PRBs. The PRB _ offset of the 1 st sub-resource is 0, and PRB _ offset of the 2 nd sub-resource is 2.

Fig. 13 shows that feedback information is transmitted using a long sequence, where i is 0, and L is the length of 2 PRBs when 2, 24; i ═L is the length of 3 PRBs at 1, 3, 36, i is 0, 1m in fig. 13 ₀ 0; m when i is 2 ₀ When i is 3, m is 12 ₀ 18; m when the feedback information is NACK _cs M when feedback information is ACK when 0, i is 0, 2 _cs M when feedback information is ACK when i is 6, i is 1, 2 _cs ＝9。

Fig. 14 shows that feedback information is transmitted using a short sequence, L is the length of 1 PRB, 12, and i is 0, 1m in fig. 14 ₀ ＝0；i＝2，3m ₀ 6; m when the feedback information is NACK _cs When the feedback information is ACK, m is 0 _cs ＝3。

For example, as shown in fig. 15 and fig. 16, on the basis of the implementation f3, the feedback resource set (including 5 PRBs) is divided into N1 subsets of sub-resources, N1 is, for example, 2, and each of the N1 subsets of sub-resources includes different frequency domain resources. The N1 sub-resources are divided into N2 sub-resources, N2 is, for example, 2, and the code domain parameters of the sub-resources in the N2 sub-resources are different.

The first resource (1 st sub-resource) of the UE1 occupies 3 PRBs, the first resource (2 nd sub-resource) of the UE2 occupies 2 PRBs, the first resource (1 st sub-resource) of the UE3 occupies 3 PRBs, and the first resource (2 nd sub-resource) of the UE4 occupies 2 PRBs. The PRB _ offset of the 1 st sub-resource is 0, and PRB _ offset of the 2 nd sub-resource is 3.

Fig. 15 shows that feedback information is transmitted using a long sequence, where i is 0, and L is the length of 3 PRBs when i is 2, 36; l is the length of 2 PRBs, 24 when i is 1, 3, i is 0, 1m in fig. 13 ₀ 0; m when i is 2 ₀ When i is 3, m is 18 ₀ 12; m when the feedback information is NACK _cs M when feedback information is ACK when 0, i is 0, 2 _cs M when feedback information is ACK when i is 9, 1, 2 _cs ＝6。

Fig. 16 shows that feedback information is transmitted using a short sequence, L is the length of 1 PRB, 12, and i is 0, 1m in fig. 16 ₀ ＝0；i＝2，3m ₀ 6; m when the feedback information is NACK _cs When the feedback information is ACK, m is 0 _cs ＝3。

In another implementation, the first code domain parameter m is guaranteed first _cs Spacing, then guaranteeing the second code field parameter m ₀ Spacer: m when the feedback information is NACK _cs When the feedback information is ACK, m is 0 _cs 2L/N; i is 0 to

m ₀ ＝0；

To N-1, m ₀ ＝L/N。

If N is 4, i is 0, 1m ₀ ＝0；i＝2，3m ₀ M when the feedback information is NACK ═ L/4 _cs When the feedback information is ACK, m is 0 _cs ＝L/2。

Illustratively, as shown in fig. 17 and fig. 18, on the basis of the implementation f1, the feedback resource set (including 5 PRBs) is divided into N1 subsets of sub-resources, N1 is, for example, 2, and each of the N1 subsets of sub-resources includes different frequency domain resources. The N1 sub-resources are divided into N2 sub-resources, N2 is, for example, 2, and the code domain parameters of the sub-resources in the N2 sub-resources are different.

Fig. 17 shows that feedback information is transmitted using a long sequence, L is the length of 2 PRBs, 24, and in fig. 17, i is 0, 1m ₀ ＝0；i＝2，3m ₀ 6; m when the feedback information is NACK _cs When the feedback information is ACK, m is 0 _cs ＝12。

Fig. 18 shows that feedback information is transmitted using a short sequence, L is the length of 1 PRB, 12, and in fig. 12, i is 0, 1m ₀ ＝0；i＝2，3m ₀ 3; m when the feedback information is NACK _cs When the feedback information is ACK, m is 0 _cs ＝6。

Illustratively, as shown in fig. 19 and fig. 20, on the basis of the implementation f2, the feedback resource set (including 5 PRBs) is divided into N1 subsets of sub-resources, N1 is, for example, 2, and each of the N1 subsets of sub-resources includes different frequency domain resources. The N1 sub-resources are divided into N2 sub-resources, N2 is, for example, 2, and the code domain parameters of the sub-resources in the N2 sub-resources are different.

Fig. 19 shows that feedback information is transmitted using a long sequence, where i is 0, and L is the length of 2 PRBs when 2, 24; l is the length of 3 PRBs, 36 when i is 1 and 3, i is 0 and 1m in fig. 19 ₀ 0; m when i is 2 ₀ When i is 3, m is 6 ₀ 9; m when the feedback information is NACK _cs M when feedback information is ACK when 0, i is 0, 2 _cs M when feedback information is ACK when 12,

i

1, 2 _cs ＝18。

Fig. 20 shows that feedback information is transmitted using a short sequence, L is the length of 1 PRB, 12, and i is 0, 1m in fig. 14 ₀ ＝0；i＝2，3m ₀ 3; m when the feedback information is NACK _cs When the feedback information is ACK, m is 0 _cs ＝6。

Illustratively, as shown in fig. 21 and fig. 22, on the basis of the implementation f3, the feedback resource set (including 5 PRBs) is divided into N1 subsets of sub-resources, N1 is, for example, 2, and each of the N1 subsets of sub-resources includes different frequency domain resources. The N1 sub-resources are divided into N2 sub-resources, N2 is, for example, 2, and the code domain parameters of the sub-resources in the N2 sub-resources are different.

Fig. 21 shows that feedback information is transmitted using a long sequence, where i is 0, and L is the length of 3 PRBs when i is 2, 36; l is the length of 2 PRBs, 24 when i is 1, 3, i is 0, 1m in fig. 21 ₀ 0; m when i is 2 ₀ When i is 3, m is 9 ₀ 6; inverse directionM when the feed information is NACK _cs M when feedback information is ACK when 0, i is 0, 2 _cs M when feedback information is ACK when i is 1, 2 is 18 _cs ＝12。

Fig. 22 shows that feedback information is transmitted using a short sequence, L is the length of 1 PRB, 12, and i is 0, 1m in fig. 16 ₀ ＝0；i＝2，3m ₀ 3; m when the feedback information is NACK _cs When the feedback information is ACK, m is 0 _cs ＝6。

In the above examples of fig. 11 to 22, N-4 is taken as an example for explanation.

It should be noted that, the step "dividing into N1 sub-resources" and the step "dividing into N2 sub-resources" do not have to be in a sequential order, that is, the feedback resource set may be divided into N1 sub-resources with frequency division first, and then divided into N2 sub-resources with code division first, or vice versa.

On the basis of the above embodiment, in a unicast and multicast coexisting service scenario, the unicast receiving UE implicitly calculates the location or information of the frequency domain and code domain resources of the PSFCH using the existing information, and a feedback resource is shared between unicast and multicast in a frequency division manner.

In one implementation, any one of the N1 sub-resources is used for transmitting feedback information of unicast service or for transmitting feedback information of multicast service.

Unicast service: m is ₀ A fixed value, such as 0, is preset. M when transmitting NACK _cs When ACK is transmitted m is 0 _cs L/2, L is the sequence length of the first resource.

Illustratively, as shown in FIG. 23, each of the N1 children occupies one of the N children

PRB, using long sequence

Or using a short sequence L ═ Nsc similar to PUCCH format 0, and repeating

Next, the process is carried out. The ith first resource occupies the ith +1 part of the frequency domain resources, and,

for example, the feedback information of the unicast service of the UE1 and the feedback information of the multicast service share one feedback resource in a frequency division manner.

Illustratively, as shown in FIG. 24, the first N1-1 of the N1 sub-resources occupy

PRB, N1 th sub-resource

A PRB;

Secondly;

Next, the process is repeated.

The frequency domain resource of the ith first resource occupies the frequency domain resource of the (i + 1) th sub-resource, and the offset is

Illustratively, as shown in FIG. 25, the 1 st sub-resource of the N1 sub-resources occupies

One PRB and the rest N1-1 parts of sub resources

A plurality of PRBs;

Next, the process is repeated. The frequency domain resource of the first resource occupies the frequency domain resource of the (i + 1) th sub-resource, and the offset

Next, the process is carried out. Ith firstThe frequency domain resource of the resource occupies the frequency domain resource of the (i + 1) th sub-resource and the offset

In the implementation mode, when the NR V2X sidelink unicast and multicast services coexist, the implicit calculation of the position and information of the frequency domain and code domain resources of the PSFCH of the unicast service is implemented.

In the above embodiment, the case where data of multiple UEs occupy multiple slots is taken as an example for explanation, and in practical application, for example, the resources of UE2, UE3, and UE4 may be resources corresponding to other slots or sub-channels of UE 1.

Further, a procedure of determining the first resource when data of one UE occupies multiple slots or multiple sub-channels is described below.

According to the foregoing embodiments, one slot and one sub-channel may determine the frequency domain, code domain resource parameters of the first resource of one PSFCH. When data of one UE occupies multiple slots or multiple sub-channels, only one PSFCH is fed back, so that multiple available resources can be selected.

The step "determining a first resource from a set of feedback resources" may be implemented by:

if the sidelink information sent by the second terminal device occupies M1 time domain resource units, the first terminal device uses a third sub-resource included by M1 of the N1 parts of sub-resources as the first resource, and the third sub-resource is a sub-resource corresponding to a time domain resource unit with a maximum or minimum time domain resource index value among the M1 parts of sub-resources; or, the first terminal device uses the M1 parts of sub-resources as the first resource, and each sub-resource in the M1 parts of sub-resources is used for transmitting the same feedback information; m1 is an integer less than or equal to N1 and greater than 1; or the like, or, alternatively,

if the sidelink information sent by the second terminal device occupies L1 frequency domain resource sets, the first terminal device uses a fourth sub-resource included in L1 sub-resources of the N1 sub-resources as the first resource, the fourth sub-resource is a sub-resource corresponding to a frequency domain resource set with the largest or smallest frequency domain starting offset in the L1 sub-resources, and the frequency domain starting offset is an offset relative to the frequency domain starting value positions of the L1 frequency domain resource sets; or the first terminal device uses the L1 parts of sub-resources as the first resource, and each sub-resource in the L1 parts of sub-resources is used for transmitting the same feedback information; the set of frequency domain resources comprises at least one frequency domain resource unit; l1 is an integer greater than 1.

For L1 sets of frequency domain resources, i.e. multiple sub-channels, as shown in fig. 3, the multiple sub-channels are, for example, two grids of resources above and below.

Specifically, the alternative method is as follows:

1) all available resources are occupied and the same feedback information is sent.

2) Selecting one available resource to send feedback information:

a) and when the data of one UE occupies a plurality of slots, selecting the sub-resource corresponding to the slot with the maximum or minimum time domain resource index value.

b) And when the data of one UE occupies a plurality of sub-channels, selecting the sub-resources corresponding to the sub-channels with the maximum or minimum frequency domain starting offset.

One implementation b:

the first terminal device divides the feedback resource set into N3 parts of sub-resources according to the repetition period N of the feedback resource set, and the code domain parameters of any two parts of the N3 parts of sub-resources are different; n3 is an integer greater than or equal to N;

In one possible implementation, the step of "dividing the feedback resource set into N3 sub-resources" may include:

and the first terminal equipment determines the code domain resource of the first resource from the N3 parts of sub-resources according to at least one of the position information of the second resource and the sequence length of the first resource.

Wherein the location information of the second resource comprises a time domain resource index value.

In one implementation, the step "the first terminal device determines the code domain resource of the first resource from the N3 sub-resources" may include:

and the first terminal equipment determines the code domain resource of the first resource from the N3 parts of sub-resources according to the first code domain parameter and the second code domain parameter.

In one implementation, to better distinguish the first resources of different PSFCHs: ensuring the distinction between PSFCHs, i.e. m ₀ At intervals, and then ensure ACK/NACK separation, i.e., m _cs Spacing: first resource m of ith PSFCH ₀ Set is { set } (i), set is {0, delta × 1, …, delta × (N-1) }, delta ═ L/N. M when NACK is transmitted _cs When ACK is transmitted when it is equal to 0

For example, as shown in fig. 26 and fig. 27, the feedback resource set (including 5 PRBs) is divided into N3 sub-resources, N3 is, for example, 2, and each of the N3 sub-resources includes different code domain parameters.

The frequency domain resource of the first resource of UE1 and UE2 occupies 5 PRBs, and PRB _ offset of the frequency domain resource is 0.

For example, fig. 26 illustrates that feedback information is transmitted using a long sequence, where L is N _ PRB × Nsc, that is, the length of 5 PRBs, L is 60, and i is 0m in fig. 26 ₀ 0; when i is 1 hour m ₀ 30; m when the feedback information is NACK _cs When the feedback information is ACK, m is 0 _cs ＝15。

Fig. 27 shows that feedback information is transmitted using a short sequence, L is the length of 1 PRB, L equals 12, and m is 0 in fig. 27 ₀ ＝0；When i is 1 hour m ₀ 6; m when the feedback information is NACK _cs When the feedback information is ACK, m is 0 _cs ＝3。

In another implementation, to ensure a/N decoding correctness: first guarantee m _cs Spacing, then guaranteeing m ₀ Spacing: m when transmitting NACK _cs When ACK is transmitted m is 0 _cs L/2. First resource m of ith PSFCH ₀ Set is { set } (i), set is {0, delta × 1, …, delta x (N-1) },

for example, as shown in fig. 28 and fig. 29, the feedback resource set (including 5 PRBs) is divided into N3 sub-resources, N3 is, for example, 2, and each sub-resource in the N3 sub-resources includes different code domain parameters.

For example, fig. 28 illustrates that feedback information is transmitted using a long sequence, where L is N _ PRB × Nsc, that is, the length of 5 PRBs, L is 60, and i is 0m in fig. 28 ₀ 0; when i is 1, m ₀ 15; m when the feedback information is NACK _cs When the feedback information is ACK, m is 0 _cs ＝30。

Fig. 29 shows that feedback information is transmitted using a short sequence, L is the length of 1 PRB, L equals 12, and m is 0 in fig. 27 ₀ 0; when i is 1 hour m ₀ 3; m when the feedback information is NACK _cs When the feedback information is ACK, m is 0 _cs ＝6。

Further, the method further comprises:

and the first terminal equipment determines the frequency domain resource of the first resource according to the feedback resource set.

The frequency domain resources of the first resources include: adopting frequency domain resource units continuously occupied by long sequences; alternatively, the first and second electrodes may be,

the frequency domain resources of the first resources include: and adopting frequency domain resource units continuously occupied by short sequences.

On the basis of the implementation manner b, further, the first resources of different PSFCHs may share one feedback resource in a frequency division plus code division manner: the method may further include the following steps:

the first terminal equipment divides any one of the N3 parts of sub-resources into a first sub-resource and a second sub-resource according to the information type included in the feedback information, wherein the frequency domain resource units occupied by the first sub-resource and the second sub-resource are different;

Specifically, the frequency domain resource of the feedback resource set is divided into a first sub-resource and a second sub-resource.

Determining the frequency domain resource of the first resource from the first sub-resource when the feedback information is assumed to be ACK; and when the feedback information is NACK, determining the frequency domain resource of the first resource from the second sub-resource.

In one implementation, ACK and NACK are each accounted for

A number of consecutive PRBs. Sending feedback information by adopting a long sequence: each sequence

Or by short sequence repeats

And secondary sending feedback information: each sequence L ═ Nsc. The feedback information is NACK, PRB _ offset is 0, the feedback information is ACK,

wherein, m is obtained by frequency division of NACK and ACK _cs A preset fixed value, such as 0; m is a unit of ₀ Set { set } (i), set is {0, delta × 1, …, delta×(N-1)}，delta＝L/N。

For example, N ═ 2, as shown in fig. 30 and fig. 31, the feedback resource set (including 5 PRBs) is divided into N3 pieces of sub-resources, N3 is, for example, 2, and each of the N3 pieces of sub-resources includes different code domain parameters. The N3 sub-resources are divided into a first sub-resource and a second sub-resource, each of which occupies 2 PRBs, and the first sub-resource and the second sub-resource include different frequency domain resource units.

The frequency domain resource of the first resource of UE1 and UE2 occupies 4 PRBs, the feedback information is NACK, PRB _ offset is 0, the feedback information is ACK, and PRB _ offset is 2.

Fig. 30 shows that feedback information is transmitted using a long sequence, L is the length of 2 PRBs, 24, and m is 0 in fig. 30 ₀ 0; when i is 1 hour m ₀ ＝12。

Fig. 31 shows that feedback information is transmitted using a short sequence, L is the length of 1 PRB, 12, and m is 0 in fig. 31 ₀ 0; when i is 1, m ₀ ＝6。

In another implementation, NACK preemption

A continuous PRB, each sequence when long sequence is adopted

Or by short sequence repeats

Secondly: each sequence L ═ Nsc. ACK occupation

A continuous PRB, each sequence when long sequence is adopted

Or by short sequence repeats

Secondly: each sequence L ═ Nsc.

The feedback information is NACK, PRB _ offset is 0The feedback information is an ACK, and the ACK,

wherein, m is obtained by frequency division of NACK and ACK _cs A preset fixed value, such as 0; m is ₀ Set is { set } (i), set is {0, delta × 1, …, delta × (N-1) }, delta is L/N.

For example, N ═ 2, as shown in fig. 32 and fig. 33, the feedback resource set (including 5 PRBs) is divided into N3 sub-resources, N3 is, for example, 2, and each of the N3 sub-resources includes different code domain parameters. And dividing the N3 sub-resources into a first sub-resource and a second sub-resource, wherein the first sub-resource occupies 3 PRBs, the second sub-resource occupies 2 PRBs, and the first sub-resource and the second sub-resource comprise different frequency domain resource units.

The frequency domain resource of the first resource of UE1 and UE2 occupies 5 PRBs, the feedback information is NACK, PRB _ offset is 0, the feedback information is ACK, and PRB _ offset is 2.

Fig. 32 shows that feedback information is transmitted using a long sequence, NACK is a length of 2 PRBs, L is 24, ACK is a length of 3 PRBs, L is 36, and m is 0 in fig. 32 ₀ 0; NACK, m when i is 1 ₀ ＝12；ACK，m ₀ ＝18。

Fig. 33 shows that feedback information is transmitted using a short sequence, L is the length of 1 PRB, L equals 12, and m is 0 in fig. 33 ₀ 0; when i is 1 hour m ₀ ＝6。

In yet another implementation, the NACK is accounted for

A continuous PRB, each sequence when long sequence is adopted

Or by short sequence repeats

Secondly: each sequence L ═ Nsc. ACK occupation

A continuous PRB, each sequence when long sequence is adopted

Or by short sequence repeats

Secondly: each sequence L ═ Nsc.

The feedback information is NACK, PRB _ offset is 0, the feedback information is ACK,

wherein, m is obtained by frequency division of NACK and ACK _cs A preset fixed value, such as 0; m is ₀ Set is { set } (i), set is {0, delta × 1, …, delta × (N-1) }, delta ═ L/N.

For example, N ═ 2, as shown in fig. 34 and fig. 35, the feedback resource set (including 5 PRBs) is divided into N3 pieces of sub-resources, N3 is, for example, 2, and each of the N3 pieces of sub-resources includes different code domain parameters. And dividing the N3 sub-resources into a first sub-resource and a second sub-resource, wherein the first sub-resource occupies 2 PRBs, the second sub-resource occupies 3 PRBs, and the first sub-resource and the second sub-resource comprise different frequency domain resource units.

The frequency domain resource of the first resource of UE1 and UE2 occupies 5 PRBs, the feedback information is NACK, PRB _ offset is 0, the feedback information is ACK, and PRB _ offset is 3.

Fig. 34 shows that feedback information is transmitted using a long sequence, NACK is 3 PRBs long, L is 36, ACK is 2 PRBs long, L is 24, and m is 0 in fig. 34 ₀ 0; NACK, m when i is 1 ₀ ＝18；ACK，m ₀ ＝12。

Fig. 35 shows feedback information transmission using a short sequence, where L is the length of 1 PRB, L is 12, and m is 0 in fig. 35 ₀ 0; when i is 1 hour m ₀ ＝6。

In one implementation, the step "determining a first resource from a set of feedback resources" may be implemented by:

if the sidelink information sent by the second terminal device occupies M2 time domain resource units, the first terminal device uses a fifth sub-resource included by the M2 sub-resources of the N3 sub-resources as the first resource, and the fifth sub-resource is a sub-resource corresponding to the time domain resource unit with the maximum or minimum time domain resource index value of the M2 sub-resources; or, the first terminal device uses the M2 parts of sub-resources as the first resource, and each sub-resource in the M2 parts of sub-resources is used for transmitting the same feedback information; m2 is an integer less than or equal to N3 and greater than 1; or the like, or, alternatively,

if the sidelink information sent by the second terminal device occupies L2 frequency domain resource sets, the first terminal device uses, as the first resource, a sixth sub-resource included in L2 sub-resources of the N3 sub-resources, where the sixth sub-resource is a sub-resource corresponding to a frequency domain resource set with a maximum or minimum frequency domain starting offset among the L2 sub-resources, and the frequency domain starting offset is an offset relative to the frequency domain starting value positions of the L2 frequency domain resource sets; or, the first terminal device uses the L2 parts of sub-resources as the first resource, and each sub-resource in the L2 parts of sub-resources is used for transmitting the same feedback information; the set of frequency domain resources comprises at least one frequency domain resource unit; l2 is an integer greater than 1.

The specific alternative method is as follows:

2) Selecting one available resource to send feedback information:

In summary, the method of the embodiment of the present application can implement that the frequency domain and code domain resources of each PSFCH in the unicast mode are determined by an implicit method, without increasing additional SCI overhead, and in the above scheme, multiple PSFCHs multiplex one feedback resource in different ways.

Having described the communication method according to the embodiment of the present application in detail above, the first terminal device of the embodiment of the present application will be described below.

The embodiment of the application describes a schematic structure of the first terminal device in detail.

In one example, fig. 36 shows a schematic block diagram of a first terminal device according to an embodiment of the present application. The first terminal device in the embodiment of the present application may be the first UE at the receiving end in the above method embodiment, or may be one or more chips in the first UE. The first terminal device may be configured to perform some or all of the functions of the first terminal device in the above method embodiments. For example, the processing module 3602 may be configured to perform part or all of the functions of the first terminal device in the above method embodiments. The first terminal device 3600 may include:

a receiving module 3601, configured to receive sidelink information sent from a second terminal device, where the sidelink information includes at least one of sidelink service data and indication information of the sidelink service data;

a processing module 3602, configured to determine, according to a repetition period N of a feedback resource set and the sidelink information, a first resource from the feedback resource set, where the feedback resource set is used to transmit feedback information of a sidelink; n is an integer greater than 0;

a sending module 3603, configured to send feedback information to the second terminal device through the first resource, where the feedback information is used to indicate whether the sidelink service data is correctly received by the first terminal device.

The apparatus of this embodiment may be configured to implement the technical solutions of the above method embodiments, and the implementation principles and technical effects are similar, which are not described herein again. ,

alternatively, the first terminal device 3600 may be configured as a general processing system, for example, generally called a chip, and the processing module 3602 of the first terminal device 3600 may include: one or more processors providing processing functionality; the receiving module 3601 and the sending module 3602 may be, for example, an input/output interface, a pin or a circuit, and the input/output interface may be used to take charge of information interaction between the chip system and the outside, for example, the input/output interface may output a transmission signal of the sending device to other modules outside the chip for processing. The processing module can execute computer execution instructions stored in the storage module to realize the functions of the sending device in the method embodiment.

In another example, fig. 37 shows a schematic block diagram of another first terminal device 370 of an embodiment of the present application. The first terminal device 370 in this embodiment may be the first terminal device in the above method embodiment, and the first terminal device 370 may be configured to perform part or all of the functions of the receiving device in the above method embodiment. The first terminal device 370 may include: the processor 3701, the transceiver 3702, and optionally the first terminal device 370 may further include a memory 3703. The various components of the first end device 370 are coupled together by a bus 3704, where the bus 3704 includes a power bus, a control bus, and a status signal bus in addition to a data bus. But for the sake of clarity the various busses are labeled in the drawings as bus 3704.

The processor 3701 may be used to implement control of the first terminal device, to perform the processing performed by the first terminal device in the above embodiments, to perform the processing involved in the receiving device in the above method embodiments and/or other processes for the techniques described herein, and to run an operating system, responsible for managing the bus, and to execute programs or instructions stored in the memory.

The transceiver 3702 may be used to support transceiving information between the first terminal device and the second terminal device referred to in the above embodiments, so as to support wireless communication between the first terminal device and the second terminal device. A memory 3703 can be used to store program codes and data for the receiving device.

It will be appreciated that fig. 37 only shows a simplified design of the first terminal device. For example, in practical applications, the first terminal device may include any number of transmitters, receivers, processors, memories, etc., and all first terminal devices that can implement the present application are within the scope of the present application.

In one possible implementation, the first terminal device may also be implemented using: one or more field-programmable gate arrays (FPGAs), Programmable Logic Devices (PLDs), controllers, state machines, gate logic, discrete hardware components, any other suitable circuitry, or any combination of circuitry capable of performing the various functions described throughout this application.

In yet another example, the present application further provides a computer storage medium, which may store program instructions for instructing any one of the above methods, so that a processor executes the program instructions to implement the method and the functions related to the first terminal device in the above method embodiments.

The Processor related to the first terminal device may be a general-purpose Processor, such as a general-purpose Central Processing Unit (CPU), a Network Processor (NP), a microprocessor, or the like, or may be an application-specific integrated circuit (ASIC), or one or more integrated circuits for controlling execution of the program according to the present application. The device can also be a Digital Signal Processor (DSP), a Field-Programmable Gate Array (FPGA), or other Programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The controller/processor can also be a combination of computing functions, e.g., comprising one or more microprocessors, DSPs, and microprocessors, among others. Processors typically perform logical and arithmetic operations based on program instructions stored within memory.

The memory referred to in the first terminal device may also hold an operating system and other application programs. In particular, the program may include program code including computer operating instructions. More specifically, the memory may be a read-only memory (ROM), other types of static storage devices that store static information and instructions, a Random Access Memory (RAM), other types of dynamic storage devices that store information and instructions, a disk memory, and so forth. The memory may be a combination of the above memory types. And the computer-readable storage medium/memory described above may be in the processor, may be external to the processor, or distributed across multiple entities including the processor or processing circuitry. The computer-readable storage medium/memory described above may be embodied in a computer program product. By way of example, a computer program product may include a computer-readable medium in packaging material.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. 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 above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the procedures or functions described in accordance with the present application are generated, 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 may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by wire (e.g., coaxial cable, fiber optic, digital subscriber line) or wirelessly (e.g., infrared, wireless, microwave, etc.). 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., DVD), or a semiconductor medium (e.g., Solid State Disk), among others.

In combination with the above, the present application also provides the following embodiments:

embodiment 1, a communication method, wherein the method comprises:

the first terminal equipment determines a first resource from a feedback resource set according to a repetition period N of the feedback resource set and the side link information, wherein the feedback resource set is used for transmitting the feedback information of the side link; n is an integer greater than 0;

and the first terminal equipment sends feedback information to the second terminal equipment through the first resource, wherein the feedback information is used for indicating whether the side-link service data is correctly received by the first terminal equipment.

Embodiment 2 and the communication method according to embodiment 1, where the determining, by the first terminal device, a first resource from a feedback resource set according to a repetition period N of the feedback resource set and the sidelink information includes:

the first terminal device divides the feedback resource set into N1 parts of sub-resources according to the repetition period N of the feedback resource set, wherein frequency domain resource units occupied by any two parts of sub-resources in the N1 parts of sub-resources are different; n1 is an integer greater than 0;

and the first terminal equipment determines the frequency domain resource of the first resource from the N1 parts of sub resources.

Embodiment 3, according to the communication method in embodiment 2, the determining, by the first terminal device, a frequency domain resource of the first resource from the N1 pieces of sub resources includes:

Embodiment 4, according to the communication method of embodiment 3, the location information of the second resource includes a time domain resource index value.

Embodiment 5, according to the communication method in any embodiment 2 to embodiment 4, wherein the frequency domain resource of the first resource includes: adopting frequency domain resource units continuously occupied by long sequences; alternatively, the first and second electrodes may be,

the frequency domain resources of the first resources include: adopting frequency domain resource units continuously occupied by short sequences; alternatively, the first and second electrodes may be,

the frequency domain resources of the first resources include: and adopting frequency domain resource units discontinuously occupied by the short sequences.

Embodiment 6, according to the communication method in any one of embodiments 2 to 5, wherein the dividing, by the first terminal device, the feedback resource set into N1 sub-resources according to the repetition period N of the feedback resource set includes:

the first terminal device determines the offset of each sub-resource in the N1 sub-resources relative to the initial position of the feedback resource set according to the repetition period N of the feedback resource set and the number of frequency domain resource units occupied by the frequency domain resources of the feedback resource set;

the first terminal device divides the frequency domain resources of the feedback resource set into the N1 sub-resources according to the offset of each sub-resource of the N1 sub-resources relative to the starting position of the feedback resource set.

Embodiment 7, the communication method according to any of embodiments 2 to 5, the method further comprising:

Embodiment 8, the communication method according to any of embodiments 2 to 5, the method further comprising:

the first terminal device divides any one of the N1 sub-resources into N2 sub-resources according to a repetition period N of the feedback resource set, wherein code domain parameters of any two of the N2 sub-resources are different; n2 is an integer greater than or equal to 1; and the first terminal equipment determines the code domain resource of the first resource from the N2 sub-resources.

Embodiment 9, according to the communication method of embodiment 8, the determining, by the first terminal device, a code domain resource of the first resource from the N2 pieces of sub-resources includes:

Embodiment 10, the communication method according to any of embodiments 2 to 5, the method further comprising:

and any one of the N1 sub-resources is used for transmitting feedback information of unicast service or feedback information of multicast service.

Embodiment 11, the method according to any of embodiments 2 to 5, wherein the determining a first resource from the feedback resource set includes:

if the sidelink information sent by the second terminal device occupies M1 time domain resource units, the first terminal device uses a third sub-resource included by M1 of the N1 sub-resources as the first resource, where the third sub-resource is a sub-resource corresponding to a time domain resource unit with a maximum or minimum time domain resource index value among the M1 sub-resources; or, the first terminal device uses the M1 sub-resources as the first resource, and each sub-resource in the M1 sub-resources is used for transmitting the same feedback information; the M1 is an integer less than or equal to N1 and greater than 1; or the like, or, alternatively,

if the sidelink information sent by the second terminal device occupies L1 frequency domain resource sets, the first terminal device uses, as the first resource, a fourth sub-resource included in L1 sub-resources of the N1 sub-resources, where the fourth sub-resource is a sub-resource corresponding to a frequency domain resource set with a maximum or minimum frequency domain starting offset among the L1 sub-resources, and the frequency domain starting offset is an offset relative to frequency domain starting value positions of the L1 frequency domain resource sets; or, the first terminal device uses the L1 sub-resources as the first resource, and each sub-resource in the L1 sub-resources is used for transmitting the same feedback information; the set of frequency domain resources comprises at least one frequency domain resource unit; l1 is an integer greater than 1.

Embodiment 12 and the communication method according to embodiment 1, where the determining, by the first terminal device, a first resource from a feedback resource set according to a repetition period N of the feedback resource set and the sidelink information includes:

the first terminal device divides the feedback resource set into N3 sub-resources according to the repetition period N of the feedback resource set, wherein the code domain parameters of any two sub-resources in the N3 sub-resources are different; n3 is an integer greater than or equal to N;

and the first terminal equipment determines the code domain resource of the first resource from the N3 sub-resources.

Embodiment 13, according to the communication method of embodiment 12, the determining, by the first terminal device, a code domain resource of the first resource from the N3 pieces of sub-resources includes:

Embodiment 14, the communication method according to embodiment 13, wherein the location information of the second resource includes a time domain resource index value.

Embodiment 15, according to the communication method of embodiment 12, the determining, by the first terminal device, a code domain resource of the first resource from the N3 pieces of sub-resources includes:

the first terminal equipment determines the first code domain parameter and the second code domain parameter according to at least one of the sequence length of the first resource and the repetition period N of the feedback resource set; the first code domain parameter is associated with the feedback information; the second code domain parameter is associated with a starting value of a code domain resource in the first resource;

Embodiment 16, the communication method according to any of embodiments 12 to 15, the method further comprising:

Embodiment 17, the communication method according to embodiment 16, wherein the frequency domain resource of the first resource includes: adopting frequency domain resource units continuously occupied by long sequences; alternatively, the first and second electrodes may be,

Embodiment 18, the communication method according to any of embodiments 12 to 15, the method further comprising:

the first terminal device divides any one of the N3 sub-resources into a first sub-resource and a second sub-resource according to the information type included in the feedback information, where frequency domain resource units occupied by the first sub-resource and the second sub-resource are different;

Embodiment 19, the communication method according to embodiment 18, wherein the location information of the second resource includes a time domain resource index value.

Embodiment 20 and the communication method according to embodiment 18, wherein the dividing, by the first terminal device, any one of the N3 sub-resources into a first sub-resource and a second sub-resource according to a type of information included in the feedback information includes:

the first terminal equipment determines the offset of the first sub-resource and the second sub-resource relative to the initial position of the frequency domain resource of the feedback resource set according to the number of frequency domain resource units occupied by the frequency domain resource of the feedback resource set;

and the first terminal equipment divides the frequency domain resources of the feedback resource set into the first sub-resources and the second sub-resources according to the offset of each of the first sub-resources and the second sub-resources relative to the starting position of the feedback resource set.

Embodiment 21, the communication method according to embodiment 18, wherein the frequency domain resource of the first resource includes: adopting frequency domain resource units continuously occupied by long sequences; alternatively, the first and second electrodes may be,

Embodiment 22, the method of communication according to any of embodiments 12 to 15, wherein the determining a first resource from the set of feedback resources comprises:

if the sidelink information sent by the second terminal device occupies M2 time domain resource units, the first terminal device uses a fifth sub-resource included by M2 of the N3 sub-resources as the first resource, where the fifth sub-resource is a sub-resource corresponding to a time domain resource unit with a maximum or minimum time domain resource index value among the M2 sub-resources; or, the first terminal device uses the M2 sub-resources as the first resource, and each sub-resource in the M2 sub-resources is used for transmitting the same feedback information; the M2 is an integer less than or equal to N3 and greater than 1; or the like, or, alternatively,

if the sidelink information sent by the second terminal device occupies L2 frequency domain resource sets, the first terminal device uses, as the first resource, a sixth sub-resource included in L2 sub-resources of the N3 sub-resources, where the sixth sub-resource is a sub-resource corresponding to a frequency domain resource set with a maximum or minimum frequency domain starting offset among the L2 sub-resources, and the frequency domain starting offset is an offset relative to frequency domain starting value positions of the L2 frequency domain resource sets; or, the first terminal device uses the L2 sub-resources as the first resource, and each sub-resource in the L2 sub-resources is used for transmitting the same feedback information; the set of frequency domain resources comprises at least one frequency domain resource unit; l2 is an integer greater than 1.

Embodiment 23, a first terminal device, wherein the first terminal device includes:

a processing module, configured to determine a first resource from a feedback resource set according to a repetition period N of the feedback resource set and the sidelink information, where the feedback resource set is used to transmit feedback information of a sidelink; n is an integer greater than 0;

Embodiment 24, according to the first terminal device of embodiment 23, the processing module is specifically configured to:

Embodiment 25, according to the first terminal device of embodiment 24, the processing module is specifically configured to:

Embodiment 26, the first terminal device according to embodiment 25, wherein the location information of the second resource includes a time domain resource index value.

Embodiment 27, the first terminal device according to any one of embodiments 23 to 26, wherein the frequency domain resource of the first resource includes: adopting frequency domain resource units continuously occupied by long sequences; alternatively, the first and second electrodes may be,

Embodiment 28 and the first terminal device according to any one of embodiments 23 to 26, wherein the processing module is specifically configured to:

Embodiment 29 and the first terminal device according to any embodiment of embodiments 23 to 26, wherein the processing module is further configured to:

Embodiment 30, the first terminal device according to any one of embodiments 23 to 26, wherein the processing module is further configured to:

the first terminal device divides any one of the N1 sub-resources into N2 sub-resources according to a repetition period N of the feedback resource set, wherein code domain parameters of any two of the N2 sub-resources are different; n2 is an integer greater than or equal to 1; and the first terminal equipment determines the code domain resource of the first resource from the N2 parts of sub resources.

Embodiment 31, according to the first terminal device of embodiment 30, the processing module is specifically configured to:

Embodiment 32 and the first terminal device according to any one of embodiments 23 to 26, wherein any one of the N1 sub-resources is used to transmit feedback information of a unicast service or feedback information of a multicast service.

Embodiment 33 and the first terminal device according to any one of embodiments 23 to 26, wherein the processing module is specifically configured to:

if the sidelink information sent by the second terminal device occupies L1 frequency domain resource sets, the first terminal device uses, as the first resource, a fourth sub-resource included in L1 sub-resources of the N1 sub-resources, where the fourth sub-resource is a sub-resource corresponding to a frequency domain resource set with a maximum or minimum frequency domain starting offset among the L1 sub-resources, and the frequency domain starting offset is an offset relative to frequency domain starting value positions of the L1 frequency domain resource sets; or, the first terminal device uses the L1 sub-resources as the first resource, and each sub-resource in the L1 sub-resources is used for transmitting the same feedback information; the set of frequency domain resources comprises at least one frequency domain resource unit; l1 is an integer greater than 1;

embodiment 34, according to the first terminal device of embodiment 23, the processing module is specifically configured to:

Embodiment 35, according to the first terminal device of embodiment 34, the processing module is specifically configured to:

Embodiment 36, the first terminal device according to embodiment 35, wherein the location information of the second resource includes a time domain resource index value.

Embodiment 37, according to the first terminal device of embodiment 34, the processing module is specifically configured to:

Embodiment 38, the first terminal device according to any one of embodiments 34 to 37, wherein the processing module is further configured to:

Embodiment 39, the first terminal device according to embodiment 38, wherein the frequency domain resource of the first resource includes: adopting frequency domain resource units continuously occupied by long sequences; alternatively, the first and second electrodes may be,

Embodiment 40, the first terminal device according to any one of embodiments 34 to 37, wherein the processing module is further configured to:

Embodiment 41 and the first terminal device in embodiment 40, wherein the location information of the second resource includes a time domain resource index value.

Embodiment 42, according to the first terminal device of embodiment 40, the processing module is specifically configured to:

and the first terminal equipment divides the frequency domain resource of the feedback resource set into the first sub-resource and the second sub-resource according to the offset of each sub-resource in the first sub-resource and the second sub-resource relative to the initial position of the feedback resource set.

Embodiment 43 the first terminal device of embodiment 40, wherein the frequency domain resources of the first resources include: adopting frequency domain resource units continuously occupied by long sequences; alternatively, the first and second electrodes may be,

Embodiment 44, the first terminal device according to any one of embodiments 34 to 37, wherein the processing module is specifically configured to:

Embodiment 45, a first terminal device, the first terminal device comprising: a processor, a transceiver; the transceiver is coupled to the processor, and the processor controls transceiving action of the transceiver;

the transceiver configured to:

receiving sidelink information sent by second terminal equipment, wherein the sidelink information comprises sidelink service data and indication information of the sidelink service data;

the processor configured to:

determining a first resource from a feedback resource set according to a repetition period N of the feedback resource set and the sidelink information, wherein the feedback resource set is used for transmitting the feedback information of the sidelink; n is an integer greater than 0;

the transceiver configured to:

and sending feedback information to the second terminal equipment through the first resource, wherein the feedback information is used for indicating whether the sidelink service data is correctly received by the first terminal equipment.

Embodiment 46 the first terminal device of embodiment 45, wherein the processor is configured to:

Embodiment 47, the first terminal device according to embodiment 46, the processor configured to:

Embodiment 48 the first terminal device according to embodiment 47,

Embodiment 49 of the first terminal device according to any of embodiments 45 to 47, wherein the processor is configured to:

Embodiment 50, the first terminal device according to any one of embodiments 45 to 47, wherein the processor is configured to:

Embodiment 51 the first terminal device according to any of embodiments 45 to 47, wherein the processor is configured to:

Embodiment 52 the first terminal device of embodiment 50, wherein the processor is configured to:

Embodiment 53, the first terminal device according to any of embodiments 45 to 47, the processor configured to:

Embodiment 54 the first terminal device according to any of embodiments 45 to 47, wherein the processor is configured to:

Embodiment 55, the first terminal device according to embodiment 45, the processor configured to:

Embodiment 56 the first terminal device of embodiment 54, the processor configured to:

Embodiment 57, the first terminal device according to embodiment 55, wherein the location information of the second resource includes a time domain resource index value.

Embodiment 58 and the first terminal device according to embodiment 54, wherein the determining, by the first terminal device, a code domain resource of the first resource from the N3 pieces of sub-resources includes:

Embodiment 59, the first terminal device according to any of embodiments 54 to 57, the processor configured to:

Embodiment 60, the first terminal device according to embodiment 58, wherein the frequency domain resources of the first resources include: adopting frequency domain resource units continuously occupied by long sequences; alternatively, the first and second liquid crystal display panels may be,

Embodiment 61 the first terminal device according to any of embodiments 54 to 57, wherein the processor is configured to:

the first terminal device divides any one of the N3 sub-resources into a first sub-resource and a second sub-resource according to the information type included in the feedback information, where the frequency domain resource units occupied by the first sub-resource and the second sub-resource are different;

side link information when the feedback information sent by the first terminal device indicates that the side link service data is not correctly received by the first terminal device, determining the frequency domain resource of the first resource from the first sub-resource;

Embodiment 62 of the first terminal device of embodiment 60, wherein the location information of the second resource includes a time domain resource index value.

Embodiment 63, the first terminal device according to embodiment 60, where the dividing, by the first terminal device, any one of the N3 sub-resources into a first sub-resource and a second sub-resource according to an information type included in the feedback information includes:

Embodiment 64 the first terminal device of embodiment 60, wherein the frequency domain resources of the first resources comprise: adopting frequency domain resource units continuously occupied by long sequences; alternatively, the first and second electrodes may be,

Embodiment 65, the first terminal device according to any of embodiments 54 to 57, wherein the processor is configured to:

if the sidelink information sent by the second terminal device occupies M2 time domain resource units, the first terminal device uses a fifth sub-resource included by M2 of the N3 sub-resources as the first resource, where the fifth sub-resource is a sub-resource corresponding to a time domain resource unit with a maximum or minimum time domain resource index value among the M2 sub-resources; or, the first terminal device uses the M2 sub-resources as the first resource, and each sub-resource in the M2 sub-resources is used for transmitting the same feedback information; the M2 is an integer less than or equal to N3 and greater than 1; or the like, or a combination thereof,

Embodiment 66, a computer-readable storage medium having stored thereon computer-executable instructions for implementing the communication method according to any one of embodiments 1 to 22 when executed by a processor.

Embodiment 67, a chip coupled to a memory for executing a computer program stored in the memory to perform the communication method of any of embodiments 1 to 22.

Embodiment 68, a processor, coupled to the memory, configured to perform the communication method according to any of embodiments 1 to 22.

Embodiment 69 is a computer program product comprising instructions that, when run on a computer, cause the computer to perform the communication method of any of embodiments 1 to 22 above.

Embodiment 70, a communication system, comprising: the first terminal device and the second terminal device according to any one of embodiments 23 to 44.

Claims

1. A method of communication, comprising:

the first terminal device divides a feedback resource set into N1 parts of sub-resources according to a repetition period N of the feedback resource set, wherein frequency domain resource units occupied by any two parts of the N1 parts of sub-resources are different; n is an integer greater than 0, and N1 is an integer greater than 0;

the first terminal equipment determines the position information of a second resource of the sidelink service data according to the sidelink information; the location information of the second resource comprises a time domain resource index value;

the first terminal equipment determines the frequency domain resource of the first resource from the N1 parts of sub-resources according to the position information of the second resource;

the first terminal device sends feedback information to the second terminal device through the first resource, wherein the feedback information is used for indicating whether the sidelink service data is correctly received by the first terminal device;

the first terminal device divides the feedback resource set into N1 sub-resources according to the repetition period N of the feedback resource set, and includes:

2. The method of claim 1,

3. The method of claim 1 or 2, further comprising:

4. The method of claim 1 or 2, further comprising:

5. The method of claim 4, wherein the determining, by the first terminal device, the code domain resource of the first resource from the N2 pieces of sub-resources comprises:

6. The method of claim 1 or 2, further comprising:

7. The method according to claim 1 or 2, wherein the determining a first resource from the set of feedback resources comprises:

if the sidelink information sent by the second terminal device occupies M1 time domain resource units, the first terminal device uses a third sub-resource included by M1 of the N1 sub-resources as the first resource, where the third sub-resource is a sub-resource corresponding to a time domain resource unit with a maximum or minimum time domain resource index value among the M1 sub-resources; or, the first terminal device uses the M1 sub-resources as the first resource, and each sub-resource in the M1 sub-resources is used for transmitting the same feedback information; the M1 is an integer less than or equal to N1 and greater than 1; or the like, or a combination thereof,

if the sidelink information sent by the second terminal device occupies L1 frequency domain resource sets, the first terminal device uses a fourth sub-resource included in L1 sub-resources of the N1 sub-resources as the first resource, where the fourth sub-resource is a sub-resource corresponding to a frequency domain resource set with a maximum or minimum frequency domain starting offset in the L1 sub-resources, and the frequency domain starting offset is an offset relative to frequency domain starting value positions of the L1 frequency domain resource sets; or, the first terminal device uses the L1 sub-resources as the first resource, and each sub-resource in the L1 sub-resources is used for transmitting the same feedback information; the set of frequency domain resources comprises at least one frequency domain resource unit; l1 is an integer greater than 1.

8. A first terminal device, comprising:

the processing module is configured to divide a feedback resource set into N1 parts of sub-resources according to a repetition period N of the feedback resource set, where frequency domain resource units occupied by any two parts of the N1 parts of sub-resources are different; n is an integer greater than 0, and N1 is an integer greater than 0; determining position information of a second resource of the sidelink service data according to the sidelink information; the location information of the second resource comprises a time domain resource index value; determining the frequency domain resource of the first resource from the N1 sub-resources according to the position information of the second resource;

a sending module, configured to send feedback information to the second terminal device through the first resource, where the feedback information is used to indicate whether the sidelink service data is correctly received by the first terminal device;

the processing module is specifically configured to:

9. A first terminal device, comprising: a processor, a memory, a transceiver; the transceiver is coupled to the processor, and the processor controls transceiving action of the transceiver;

wherein the memory is to store computer-executable program code, the program code comprising instructions; the instructions, when executed by the processor, cause the terminal device to perform the method of any of claims 1 to 7.

10. A computer-readable storage medium having computer-executable instructions stored thereon, which when executed by a processor, are configured to implement the method of any one of claims 1 to 7.

11. A chip, wherein the chip is coupled to a memory for executing a computer program stored in the memory to perform the method of any of claims 1 to 7.