Method performed by user equipment and user equipment

Abstract

The present disclosure provides a method executed by a user equipment and the user equipment, the method comprising: determining configuration information of sideline communication; receiving sideline communication control information SCI and corresponding physical sideline communication shared channel PSSCH sent by other user equipment; and determining resources of a physical sideline communication feedback channel PSFCH corresponding to the PSSCH.

Description

Technical Field

[0001] The present disclosure relates to the technical field of wireless communications, and in particular to a method executed by a user equipment, a method executed by a base station, and corresponding user equipment. Background Art

[0002] In traditional cellular networks, all communications must go through base stations. In contrast, D2D communication (Device-to-Device communication) refers to the direct communication between two user devices without forwarding through a base station or core network. At the RAN#63 plenary meeting of the 3rd Generation Partnership Project (3GPP) in March 2014, a research project on using LTE devices to implement proximity D2D communication services was approved (see non-patent document 1). The functions introduced by LTE Release 12 D2D include:

[0003] 1) Discovery function between nearby devices in LTE network coverage scenarios;

[0004] 2) Direct broadcast communication (Broadcast) function between adjacent devices;

[0005] 3) The upper layer supports unicast and multicast communication functions.

[0006] At the 3GPP RAN#66 plenary meeting in December 2014, the research project of enhanced LTE eD2D was approved (see non-patent document 2). The main functions introduced by LTE Release 13eD2D include:

[0007] 1) D2D discovery in scenarios with no network coverage and partial network coverage;

[0008] 2) Priority handling mechanism for D2D communication.

[0009] Based on the design of D2D communication mechanism, the feasibility study of V2X based on D2D communication was approved at the RAN#68 plenary meeting of 3GPP in June 2015. V2X stands for Vehicle to Everything, which hopes to achieve information exchange between vehicles and all entities that may affect vehicles, with the aim of reducing accidents, easing traffic congestion, reducing environmental pollution and providing other information services. The application scenarios of V2X mainly include four aspects:

[0010] 1) V2V, Vehicle to Vehicle, i.e. vehicle-to-vehicle communication;

[0011] 2) V2P, Vehicle to Pedestrian, that is, the vehicle sends warnings to pedestrians or non-motor vehicles;

[0012] 3) V2N, Vehicle to Network, that is, vehicles connected to mobile networks;

[0013] 4) V2I, Vehicle to Infrastructure, refers to the communication between vehicles and road infrastructure.

[0014] 3GPP divides the research and standardization of V2X into three stages. The first stage was completed in September 2016, focusing mainly on V2V, based on LTE Release 12 and Release 13D2D (also known as sidelink communication), that is, proximity communication technology (see non-patent document 3). V2X stage 1 introduced a new D2D communication interface, called the PC5 interface. The PC5 interface is mainly used to solve the communication problems of cellular vehicle networks in high-speed (up to 250 km / h) and high-node density environments. Vehicles can exchange information such as location, speed and direction through the PC5 interface, that is, vehicles can communicate directly through the PC5 interface. Compared with the proximity communication between D2D devices, the functions introduced by LTE Release 14V2X mainly include:

[0015] 1) Higher density DMRS to support high-speed scenarios;

[0016] 2) Introducing sub-channels to enhance resource allocation;

[0017] 3) Introduce a user equipment sensing mechanism with semi-persistent scheduling.

[0018] The second phase of the V2X research project falls within the scope of LTE Release 15 research (see non-patent document 4). The main features introduced include high-order 64QAM modulation, V2X carrier aggregation, short TTI transmission, and feasibility study of transmit diversity.

[0019] At the 3GPP RAN#80 plenary meeting in June 2018, the corresponding third phase V2X feasibility study topic based on 5G NR network technology (see non-patent document 5) was approved. The research plan of this topic includes the research objectives of supporting sidelink unicast, sidelink groupcast and sidelink broadcast.

[0020] At the conclusion of the 3GPP RAN1#94bis meeting in October 2018 (see non-patent document 6), it was determined that HARQ feedback and HARQ combining are supported at the physical layer for unicast and multicast of sideline communications.

[0021] At the conclusion of the 3GPP RAN1#95 meeting in November 2018 (see non-patent document 7), a physical sideline communication feedback channel PSFCH was introduced to carry HARQ feedback information in sideline communications, such as HARQ ACK or HARQ NACK.

[0022] In the AH#1901 meeting of 3GPP RAN1 in January 2019 (see non-patent document 8), the design of the HARQ feedback mechanism for NR V2X groupcast included the following conclusions: For groupcast communication, when HARQ feedback is enabled, two HARQ feedback mechanisms are supported, namely:

[0023] 1) The receiving UE only feeds back HARQ NACK. When the receiving UE correctly decodes the PSCCH but fails to correctly decode the corresponding PSSCH, the receiving UE feeds back NACK. In other cases, the receiving UE does not perform HARQ feedback.

[0024] a) All receiving UEs in the group share one PSFCH resource for feeding back HARQ NACK.

[0025] 2) The receiving UE feeds back HARQ ACK and HARQ NACK; when the receiving UE correctly decodes the PSCCH but fails to correctly decode the corresponding PSSCH, the receiving UE feeds back NACK; when the receiving UE correctly decodes the PSCCH and correctly decodes the corresponding PSSCH, the receiving UE feeds back ACK.

[0026] a) Each UE in the group uses a separate PSFCH resource to feed back HARQ ACK and HARQ NACK.

[0027] In the conclusion of the 3GPP RAN1#96bis meeting in April 2019 (see non-patent document 9), the following conclusions were drawn regarding the resource configuration of PSFCH:

[0028] In a resource pool, the configuration of PSFCH in the time slots of the resource pool is periodic, and its period can be expressed as N, where the possible values ​​of N are 1, 2, or 4.

[0029] The solution of this patent includes a method for a sideline communication UE to determine a PSFCH resource for feeding back sideline communication HARQ feedback.

[0030] Prior art literature

[0031] Non-patent literature

[0032] Non-patent literature 1: RP-140518, Work item proposal on LTE Device to DeviceProximity Services

[0033] Non-Patent Literature 2: RP-142311, Work Item Proposal for Enhanced LTE Device to Device Proximity Services

[0034] Non-patent document 3: RP-152293, New WI proposal: Support for V2V services based on LTE sidelink

[0035] Non-patent document 4: RP-170798, New WID on 3GPP V2X Phase 2

[0036] Non-Patent Literature 5: RP-181480, New SID Proposal: Study on NR V2X

[0037] Non-patent document 6: RAN1#94bis, Chairman notes, section 7.2.4.2

[0038] Non-patent document 7: RAN1#95, Chairman notes, section 7.2.4.2

[0039] Non-patent document 8: RAN1 AH#1901, Chairman notes, section 7.2.4.1.4, section 7.2.4.3

[0040] Non-patent document 9: RAN1#96bis, Chairman notes, section 7.2.4.5 Summary of the invention

[0041] In order to solve at least part of the above problems, the present disclosure provides a method performed by a user equipment and a user equipment, which can be effectively applied to the application scenarios of V2X based on 5G NR network technology.

[0042] According to one aspect of the present disclosure, a method performed by a user equipment is provided, including: determining configuration information of sideline communication, i.e., first configuration information; receiving sideline communication control information SCI and corresponding physical sideline communication shared channel PSSCH sent by other user equipment; and determining resources of a physical sideline communication feedback channel PSFCH corresponding to the PSSCH.

[0043] According to a method performed by a user equipment according to one aspect of the present disclosure, the first configuration information is configuration information sent by a base station through radio resource control RRC signaling; or the first configuration information is included in the pre-configuration information of the user equipment, and the first configuration information includes configuration information of the resource pool, that is, the second configuration information.

[0044] According to a method performed by a user equipment according to one aspect of the present disclosure, the second configuration information includes: information about the size of a subchannel SubchannelSize; and / or information about the number of subchannels N subchannel ; and / or the period N of the PSFCH, where N is a positive integer; and / or the feedback interval K, where K is a positive integer.

[0045] According to a method performed by a user equipment according to one aspect of the present disclosure, the SCI sent by the other user equipment includes indication information indicating that the SCI and the corresponding PSSCH are unicast transmissions, and / or the user equipment determines the number Index of the starting subchannel of the PSSCH according to the SCI startSubchannel .

[0046] According to a method performed by a user equipment according to one aspect of the present disclosure, the number of bits of HARQ feedback of the user equipment is x bits, where x is a positive integer; and / or the PSSCH occupies n consecutive physical resource blocks PRB in the frequency domain, where n is a positive integer; and / or the user equipment determines the time slot slot s where the PSFCH corresponding to the PSSCH is located according to the time slot where the last OFDM symbol of the PSSCH is located, and / or the K, and / or the N, and / or at least one of the second configuration information other than the N and the K; and / or the user equipment determines the N consecutive time slots corresponding to the slot s according to the time slot slot s, and / or the N, and / or the K, and / or at least one of the second configuration information other than the N and the K; and / or the user equipment determines that the time slot where the last OFDM symbol of the PSSCH is located is the i+1th of the N consecutive time slots; and / or the user equipment determines the time slot slot s; and / or the user equipment according to the i, and / or the Index startSubchannel To determine the PSFCH resource or the number of the PSFCH resource.

[0047] According to a method performed by a user equipment according to one aspect of the present disclosure, the second configuration information includes: information about the size of a subchannel SubchannelSize, and / or information about the number of subchannels N subchannel , and / or the period N of the PSFCH, and / or the feedback interval K, and / or the configuration information that the side communication in the resource pool is multicast, and / or the configuration information of the receiving user equipment feedback HARQ ACK and HARQ NACK, where N and K are positive integers.

[0048] According to a method performed by a user equipment according to one aspect of the present disclosure, the SCI sent by the other user equipment includes indication information indicating that the SCI and the corresponding PSSCH are multicast transmissions, and / or the user equipment determines the number Index of the starting subchannel of the PSSCH according to the SCI startSubchannel .

[0049] According to a method performed by a user equipment according to one aspect of the present disclosure, the number of bits of HARQ feedback of the user equipment is x bits, where x is a positive integer; and / or the PSSCH occupies n consecutive physical resource blocks PRBs in the frequency domain, where n is a positive integer; and / or the user equipment determines the time slot slot s where the PSFCH corresponding to the PSSCH is located based on the time slot where the last OFDM symbol of the PSSCH is located, and / or the K, and / or the N, and / or at least one of the second configuration information other than the N and the K; and / or

[0050] The user equipment determines the N consecutive time slots corresponding to the slot s according to the time slot slot s, and / or the N, and / or the K, and / or at least one of the second configuration information other than the N and the K; and / or the user equipment determines that the time slot where the last OFDM symbol of the PSSCH is located is the i+1th of the N consecutive time slots; and / or the user equipment determines the number of the PSFCH resource on the time slot slot s; and / or the user equipment determines the intra-group identifier m; and / or the user equipment determines the index m according to the i, and / or the Index m. startSubchannel , and / or the m determines the PSFCH resource or the number of the PSFCH resource; and / or the user equipment determines the variable or or

[0051] According to a method performed by a user equipment according to one aspect of the present disclosure, m>Capacity is identified in the group of the user equipment. UE In this case, the user equipment does not feed back HARQ information, or the user equipment assumes that HARQ feedback is disabled.

[0052] In addition, according to another aspect of the present disclosure, a user equipment is provided, including: a processor; and a memory storing instructions, wherein the instructions execute the above method when executed by the processor.

[0053] Effects of the Invention

[0054] According to the present disclosure, a method performed by a user equipment and a user equipment that are effectively applicable to application scenarios of V2X based on 5G NR network technology can be provided. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] The above and other features of the present disclosure will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which:

[0056] Figure 1It is a diagram schematically showing the basic process of Rel-14 / 15LTE V2X side communication.

[0057] Figure 2 It schematically shows two resource allocation methods of Rel-14 / 15LTE V2X.

[0058] Figure 3 It is a basic flow chart schematically showing the method executed by the user equipment in Embodiments 1 to 12 of the present disclosure.

[0059] Figure 4 It is a basic flow chart schematically showing the method executed by the user equipment in the thirteenth and fourteenth embodiments of the present disclosure.

[0060] Figure 5 is a block diagram schematically showing a user equipment involved in the present disclosure. DETAILED DESCRIPTION

[0061] The present disclosure is described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the present disclosure should not be limited to the specific embodiments described below. In addition, for the sake of simplicity, detailed descriptions of known technologies that are not directly related to the present disclosure are omitted to prevent confusion in the understanding of the present disclosure.

[0062] The following uses a 5G mobile communication system and its subsequent evolution versions as an example application environment to specifically describe multiple implementations of the present disclosure. However, it should be noted that the present disclosure is not limited to the following implementations, but is applicable to more other wireless communication systems, such as communication systems after 5G and 4G mobile communication systems before 5G.

[0063] The following describes some of the terms involved in the present disclosure. Unless otherwise specified, the terms involved in the present disclosure are defined herein. The terms given in the present disclosure may be named differently in LTE, LTE-Advanced, LTE-Advanced Pro, NR and subsequent communication systems, but unified terms are used in the present disclosure, and when applied to a specific system, they can be replaced by the terms used in the corresponding system.

[0064] 3GPP: 3rd Generation Partnership Project

[0065] LTE: Long Term Evolution

[0066] NR: New Radio

[0067] PDCCH: Physical Downlink Control Channel, physical downlink control channel

[0068] DCI: Downlink Control Information, downlink control information

[0069] PDSCH: Physical Downlink Shared Channel, physical downlink shared channel

[0070] UE:User Equipment

[0071] eNB: evolved NodeB

[0072] gNB: NR base station

[0073] TTI: Transmission Time Interval, transmission time interval

[0074] OFDM: Orthogonal Frequency Division Multiplexing

[0075] C-RNTI: Cell Radio Network Temporary Identifier, cell radio network temporary identifier

[0076] CSI: Channel State Indicator, channel state indicator

[0077] HARQ: Hybrid Automatic Repeat Request

[0078] CSI-RS: CSI-Reference Signal, channel state measurement reference signal

[0079] CRS: Cell Reference Signal, cell-specific reference signal

[0080] PUCCH: Physical Uplink Control Channel, physical uplink control channel

[0081] PUSCH: Physical Uplink Shared Channel, physical uplink shared channel

[0082] UL-SCH: Uplink Shared Channel, uplink shared channel

[0083] CG: Configured Grant, configuration scheduling permission

[0084] Sidelink: Sidelink communication

[0085] SCI: Sidelink Control Information, sidelink communication control information

[0086] PSCCH: Physical Sidelink Control Channel, physical sidelink communication control channel

[0087] MCS: Modulation and Coding Scheme, modulation and coding scheme

[0088] CRB: Common Resource Block

[0089] CP: Cyclic Prefix

[0090] PRB: Physical Resource Block, physical resource block

[0091] PSSCH: Physical Sidelink Shared Channel, physical sidelink communication shared channel

[0092] FDM: Frequency Division Multiplexing

[0093] RRC: Radio Resource Control

[0094] RSRP: Reference Signal Receiving Power, reference signal receiving power

[0095] SRS: Sounding Reference Signal, detection reference signal

[0096] DMRS: Demodulation Reference Signal

[0097] CRC: Cyclic Redundancy Check

[0098] PSDCH: Physical Sidelink Discovery Channel, physical sidelink communication discovery channel

[0099] PSBCH: Physical Sidelink Broadcast Channel, physical sidelink communication broadcast channel

[0100] SFI: Slot Format Indication, slot format indication

[0101] TDD: Time Division Duplexing

[0102] FDD: Frequency Division Duplexing

[0103] SIB1: System Information Block Type 1, system information block type 1

[0104] SLSS: Sidelink synchronization Signal, sidelink communication synchronization signal

[0105] PSSS: Primary Sidelink Synchronization Signal, primary synchronization signal for sidelink communication

[0106] SSSS: Secondary Sidelink Synchronization Signal, sideline communication auxiliary synchronization signal

[0107] PCI: Physical Cell ID, physical cell identifier

[0108] PSS: Primary Synchronization Signal

[0109] SSS: Secondary Synchronization Signal, auxiliary synchronization signal

[0110] BWP: BandWidth Part, bandwidth fragment / part

[0111] GNSS: Global Navigation Satellite System

[0112] SFN: System Frame Number, system (wireless) frame number

[0113] DFN: Direct Frame Number, direct frame number

[0114] IE: Information Element

[0115] SSB: Synchronization Signal Block, synchronization system information block

[0116] EN-DC: EUTRA-NR Dual Connection, LTE-NR dual connection

[0117] MCG: Master Cell Group

[0118] SCG: Secondary Cell Group

[0119] PCell: Primary Cell

[0120] SCell: Secondary Cell

[0121] PSFCH: Physical Sidelink Feedback Channel, physical sidelink communication feedback channel

[0122] The following is a description of the prior art associated with the disclosed solution. Unless otherwise specified, the meanings of the same terms in the specific embodiments and the prior art are the same.

[0123] It is worth noting that V2X and sidelink mentioned in this disclosure have the same meaning. V2X in this document can also refer to sidelink; similarly, sidelink in this document can also refer to V2X, and no specific distinction or limitation will be made in the following text.

[0124] The resource allocation method of V2X (sidelink) communication and the transmission mode of V2X (sidelink) communication in the specification of this disclosure can be equivalently replaced.

[0125] The specification of the present disclosure relates to a PSFCH designed based on a sequence. It is worth noting that the design mode of the PSFCH channel includes a design mode based on a sequence, but is not limited to a design mode based on a sequence.

[0126] The same symbols in the specification of this disclosure always have the same meaning, such as the period N of PSFCH resource configuration, the number of PRBs occupied by PSFCH in the frequency domain, Such as the meaning of i determined by UE, and so on.

[0127] Sidelink communication scenarios

[0128] 1) Out-of-Coverage sidelink communication: Both UEs performing sidelink communication have no network coverage (for example, the UE cannot detect any cell that meets the "cell selection criteria" on the frequency required for sidelink communication, indicating that the UE has no network coverage).

[0129] 2) Sidelink communication with network coverage (In-Coverage): Both UEs performing sidelink communication have network coverage (for example, the UE detects at least one cell that meets the "cell selection criteria" on the frequency required for sidelink communication, indicating that the UE has network coverage).

[0130] 3) Partial-Coverage sidelink communication: One of the UEs performing sidelink communication has no network coverage, while the other UE has network coverage.

[0131] From the UE side, the UE has only two scenarios: no network coverage and network coverage. Partial network coverage is described from the perspective of sidelink communication.

[0132] NR V2X unicast, groupcast and broadcast

[0133] Existing LTE V2X communications only support broadcast communications at the physical layer. Broadcast communications are widely used in scenarios such as base stations sending system messages to UEs in a cell in cellular communications. The design goals of NR V2X include supporting unicast communications and multicast communications at the physical layer. Unicast communication refers to the communication between a sending user equipment (UE) and a single receiving user equipment. Multicast communication generally means that a group of UEs are assigned the same identity (ID), and the UE sends V2X data to other UEs in the group, and receives V2X data sent by other UEs in the group.

[0134] HARQ and sidelink HARQ

[0135] In order to better improve the reliability of transmission and increase the spectrum efficiency, HARQ retransmission mechanism is usually included in unicast communication and multicast communication. HARQ stands for Hybrid Automatic Repeat Request, which can provide error correction function and realize fast retransmission, and is widely used in wireless data communication. HARQ feedback includes HARQ ACK (feedback information indicates correct reception and decoding) and HARQ NACK (feedback information indicates incorrect reception and decoding). Among them, HARQ ACK indicates that the receiving UE correctly receives and decodes the data of the sending UE, so HARQ ACK is fed back; HARQ NACK indicates that the receiving UE does not correctly receive and decode the data of the sending UE. When the receiving UE feeds back HARQ NACK, the sending UE may retransmit the corresponding data to ensure the reliability of data communication.

[0136] In NR V2X, the physical layer HARQ feedback (HARQ feedback, or HARQ-ACK) and HARQ combining mechanism (HARQ combining) are supported. Among them, HARQ ACK and HARQ NACK are carried by the physical side communication feedback channel (PSFCH).

[0137] Sidelink multicast HARQ

[0138] For groupcast sideline communications, when HARQ feedback is enabled, two HARQ feedback mechanisms are supported:

[0139] 1) The receiving UE only feeds back HARQ NACK. When the receiving UE correctly decodes the PSCCH but fails to correctly decode the corresponding PSSCH, the receiving UE feeds back NACK. In other cases, the receiving UE does not perform HARQ feedback.

[0140] a) All receiving UEs in the group share one PSFCH resource for feeding back HARQ NACK.

[0141] 2) The receiving UE feeds back HARQ ACK and HARQ NACK; when the receiving UE correctly decodes the PSCCH but fails to correctly decode the corresponding PSSCH, the receiving UE feeds back NACK; when the receiving UE correctly decodes the PSCCH and correctly decodes the corresponding PSSCH, the receiving UE feeds back ACK.

[0142] a) Each UE in the group uses a separate PSFCH resource to feed back HARQ ACK and HARQ NACK.

[0143] A PSFCH resource represents a PSFCH resource mapped in a specific time domain, frequency domain, and code domain.

[0144] PSFCH resource configuration

[0145] In a resource pool, the configuration of PSFCH in the time slots of the resource pool is periodic, and its period can be expressed as N, and the possible values ​​of N are 1, 2, or 4. For example, N=1 means that all slots configured in the resource pool contain PSFCH resources; N=2 means that among all slots configured in the resource pool, there is a slot in every 2 consecutive slots, and the slot contains PSFCH resources. N=4 means that among all slots configured in the resource pool, there is a slot in every 4 consecutive slots, and the slot contains PSFCH resources.

[0146] Method for UE to determine PSFCH time domain resources

[0147] According to the configuration of PSFCH resources, the UE obtains the configuration period N of PSFCH in the time slots of the resource pool. If HARQ feedback is enabled, the UE can determine that the PSFCH carrying HARQ feedback information corresponding to the PSSCH received in N consecutive slots of the resource pool (the number of these N consecutive slots is represented by i, and the range of i is 0, 1, ..., N-1) is in the same slot s configured with PSFCH resources. In the specification of the present disclosure, N consecutive slots corresponding to slot s are used to represent these N consecutive slots, and the UE can determine the value of i based on the fact that the slot where the received PSSCH is located is the i+1th of the N consecutive slots corresponding to slot s. Here, K represents the time domain interval from the reception of PSSCH to the corresponding PSFCH, wherein, optionally, the unit of K is time slot. For example, N = 4, K = 3, and slot s corresponds to N = 4 consecutive slots: a slot in the resource pool containing PSFCH is recorded as slot PSFCH , where all slots in the resource pool are numbered slot0, slot1, ..., then these N = 4 consecutive slots are slot PSFCH-6 To Slot PSFCH-3 , which means that the UE is in slot PSFCH-6 To Slot PSFCH-3 The PSFCH corresponding to the received PSSCH is in slot PSFCHFor example, UE in Slot PSFCH-4 If PSSCH is received, it means slot PSFCH The corresponding 4 slots are the 2+1th, so i=2.

[0148] Sequence-based PSFCH

[0149] Here use Indicates the number of PRBs occupied by PSFCH in the frequency domain. The length of the sequence constituting PSFCH can be expressed as in This sequence can be expressed as r α (n) = e jαn ×r(n), where Among them, α represents the cyclic shift of the sequence. Different cyclic shifts can generate different sequences (with the same sequence length), that is, different cyclic shifts represent different PSFCH resources. Specifically, when the time domain and frequency domain resources of two PSFCHs are the same, if the cyclic shift α of the PSFCH is different (different code domain resources), the two PSFCHs represent two different PSFCH resources. On a given (or determined) time-frequency resource, when the initial sequence r(n) is given (or determined), the number of possible values ​​of α is That is r α (n) may produce at most sequences, which means that on the given (or determined) time-frequency resource, there are at most different PSFCH resources.

[0150] For example, The length of the sequence is Therefore, when a certain time-frequency resource is given, the number of possible values ​​of α is That is, there are 12 different PSFCH resources. If the UE needs to feed back 1 bit of HARQ feedback information, then the user equipment UE needs to occupy 2 different PSFCH resources to send HARQ ACK and HARQ NACK respectively. On the given time-frequency resource, at most 12 / 2=6 different user equipments can be multiplexed for HARQ feedback (each UE feeds back 1 bit of HARQ information), or, similarly, if the UE needs to feed back 2 bits of HARQ feedback information, then the user equipment UE needs to occupy 2 2 = 4 different PSFCH resources are used to send HARQ ACK and HARQ NACK for each bit of HARQ feedback information respectively. At most 12 / 4 = 3 different user equipments can be multiplexed on the given time-frequency resource for HARQ feedback.

[0151] It is worth noting that the numbering of the PSFCH resources involved in Embodiments 1 to 12 of the present disclosure may be, optionally, numbered in accordance with the cyclic shift priority criterion, for example, on a certain time-frequency resource (an OFDM symbol, A PSFCH occasion on consecutive PRBs) is numbered as Each PSFCH resource corresponds to a cyclic shift, and the difference in cyclic shifts between PSFCH resources with adjacent resource numbers is 1; on the same OFDM symbol, the next PSFCH occasion in the frequency domain (PRB number increases) corresponds to the PSFCH resource number And so on. Optionally, if at least one OFDM symbol in a time slot s contains a PSFCH occasion, then, optionally, the numbering of the PSFCH resources is based on the above method and is numbered according to the principle of OFDM symbol numbering from small to large, for example, the PSFCH resources on OFDM symbol 12 are numbered first, and then the PSFCH resources on OFDM symbol 13 are numbered, that is, the numbering of the PSFCH resources on OFDM symbol 13 is in increasing order of the numbering of the PSFCH resources on OFDM symbol 12.

[0152] Terminology in the Examples

[0153] Unless otherwise specified, the definitions and determination methods of terms in all embodiments of the specification are the same as the definitions and determination methods of the following terms.

[0154] ·Intra-group identifier of UE in multicast: In an embodiment of the present disclosure, the intra-group identifier of UE in multicast is represented by m. Optionally, an optional method for a user equipment (sending UE, or receiving UE, or sending UE and receiving UE) in multicast to determine m is to arrange the layer 2IDs (Layer-2ID, optionally, 24 bits) of all (or part of) UEs in the group in ascending or descending order, and the identifier m in the group represents the (m+1)th (or, mth) corresponding UE in the above arrangement; or, another optional method is to arrange the layer 1IDs (Layer-1ID, optionally, 8 bits, or 16 bits, or 24 bits) of all (or part of) UEs in the group in ascending or descending order, and the identifier m in the group represents the (m+1)th (or, mth) corresponding UE in the above arrangement. The method for determining the intra-group identifier of UE in the present disclosure includes but is not limited to the above method.

[0155] ■N consecutive slots corresponding to PSFCH on a certain slot: According to the configuration of PSFCH resources, the UE obtains the configuration period N of PSFCH on the time slots of the resource pool. If HARQ feedback is enabled, the UE can determine that the PSFCH carrying HARQ feedback information corresponding to the PSSCH received on N consecutive slots of the resource pool (the number of these N consecutive slots is represented by i, and the range of i is 0, 1, ..., N-1) is in the same slot s configured with PSFCH resources. In the specification of the present disclosure, N consecutive slots corresponding to slot s are used to represent these N consecutive slots. The UE can determine the value of i based on the fact that the slot where the received PSSCH is located is the i+1th of the N consecutive slots corresponding to slot s.

[0156] PSFCH occasion: PSFCH occasion indicates a specific time domain (optionally, 1 OFDM symbol), frequency domain resource (optionally, PRBs) on all PSFCHs. Among them, PSFCH occupies continuous PRBs, occupying one OFDM symbol in the time domain.

[0157] Basic process of LTE V2X (sidelink) communication

[0158] Figure 1 Figure 1 is a schematic diagram showing LTE V2X UE side communication. First, UE1 sends side communication control information (SCI format 1) to UE2, which is carried by the physical layer channel PSCCH. SCI format 1 contains scheduling information of PSSCH, such as frequency domain resources of PSSCH. Secondly, UE1 sends side communication data to UE2, which is carried by the physical layer channel PSSCH. PSCCH and the corresponding PSSCH are frequency-division multiplexed, that is, PSCCH and the corresponding PSSCH are located in the same subframe in the time domain and in different PRBs in the frequency domain. The specific design of PSCCH and PSSCH is as follows:

[0159] 1)PSCCH occupies one subframe in the time domain and two consecutive PRBs in the frequency domain. The scrambling sequence is initialized using a predefined value of 510. PSCCH can carry SCI format 1, where SCI format 1 contains at least the frequency domain resource information of PSSCH. For example, for the frequency domain resource indication field, SCI format 1 indicates the starting sub-channel number and the number of consecutive sub-channels of the PSSCH corresponding to the PSCCH.

[0160] 2) PSSCH occupies one subframe in the time domain and uses frequency division multiplexing (FDM) with the corresponding PSCCH. PSSCH occupies one or more consecutive sub-channels in the frequency domain. Sub-channel represents n in the frequency domain. subCHsize consecutive PRBs, n subCHsize Configured by RRC parameters, the number of starting sub-channel and consecutive sub-channels is indicated by the frequency domain resource indication field of SCI format 1.

[0161] LTE V2X resource allocation method Transmission Mode 3 / 4

[0162] Figure 2 It shows two resource allocation modes of LTE V2X, namely, resource allocation based on base station scheduling (Transmission Mode 3) and resource allocation based on UE sensing (Transmission Mode 4). In LTEV2X, when there is eNB network coverage, the base station can configure the resource allocation mode of the UE, or the transmission mode of the UE, through the dedicated RRC signaling SL-V2X-ConfigDedicated at the UE level, which is specifically:

[0163] 1) Resource allocation based on base station scheduling (Transmission Mode 3): The resource allocation based on base station scheduling means that the frequency domain resources used for sidelink communication come from the scheduling of the base station. Transmission mode 3 includes two scheduling modes, namely dynamic scheduling and semi-static scheduling (SPS). For dynamic scheduling, the UL grant (DCI format 5A) includes the frequency domain resources of PSSCH, and the CRC of the PDCCH or EPDCCH carrying DCI format 5A is scrambled by SL-V-RNTI. For SPS semi-static scheduling, the base station configures one or more (up to 8) configured scheduling grants (configured grant) through IE: SPS-ConfigSL-r14. Each configured scheduling grant contains a scheduling grant number (index) and the resource period of the scheduling grant. The UL grant (DCI format 5A) includes the frequency domain resources of PSSCH, as well as the indication information (3 bits) of the scheduling grant number and the indication information of SPS activation (activate) or release (release, or, deactivation). The CRC of the PDCCH or EPDCCH carrying DCI format 5A is scrambled by SL-SPS-V-RNTI.

[0164] Specifically, when the RRC signaling SL-V2X-ConfigDedicated is set to scheduled-r14, it means that the UE is configured as a transmission mode based on base station scheduling. The base station configures SL-V-RNTI or SL-SPS-V-RNTI through RRC signaling, and sends an uplink scheduling grant UL grant to the UE through PDCCH or EPDCCH (DCI format 5A, CRC is encrypted with SL-V-RNTI or SL-SPS-V-RNTI). The above-mentioned uplink scheduling grant UL grant contains at least the scheduling information of the PSSCH frequency domain resources in the sidelink communication. When the UE successfully monitors the PDCCH or EPDCCH encrypted by SL-V-RNTI or SL-SPS-V-RNTI, the PSSCH frequency domain resource indication field in the uplink scheduling grant UL grant (DCI format 5A) is used as the indication information of the frequency domain resources of the PSSCH in the PSCCH (SCI format 1), and the PSCCH (SCIformat 1) and the corresponding PSSCH are sent.

[0165] For semi-persistent scheduling SPS in transmission mode 3, the UE receives DCI format 5A scrambled by SL-SPS-V-RNTI in downlink subframe n. If DCI format 5A contains indication information of SPS activation, the UE determines the frequency domain resources of PSSCH according to the indication information in DCI format 5A, and determines the time domain resources of PSSCH (transmission subframe of PSSCH) according to information such as subframe n.

[0166] 2) Resource allocation method based on UE sensing (Transmission Mode 4): The resource allocation method based on UE sensing means that the resources used for sidelink communication are based on the UE's sensing process of the candidate available resource set. When the RRC signaling SL-V2X-ConfigDedicated is set to ue-Selected-r14, it means that the UE is configured for a transmission mode based on UE sensing. In the transmission mode based on UE sensing, the base station configures the available transmission resource pool, and the UE determines the sidelink transmission resources of the PSSCH in the transmission resource pool according to certain rules (for a detailed description of the process, see the LTE V2X UE sensing process section), and sends the PSCCH (SCI format 1) and the corresponding PSSCH.

[0167] NR parameter set (numerology)

[0168] NR supports 5 subcarrier spacings, namely 15k, 30k, 60k, 120k, and 240kHz (corresponding to μ=0, 1, 2, 3, 4) as shown in Table 4.2-1.

[0169] Table 4.2-1: Supported transmission numerologies.

[0170] μ <![CDATA[Δf=2 μ ·15[kHz]]]> Cyclic Prefix (CP) 0 15 Normal 1 30 Normal 2 60 Normal,Extended 3 120 Normal 4 240 Normal

[0171] Only when μ=2, that is, when the subcarrier spacing is 60kHz, the extended CP is supported. For other subcarrier spacings, only the normal CP is supported. For the normal CP, each time slot contains 14 OFDM symbols, that is, For extended CP, each time slot contains 12 OFDM symbols, that is, For μ = 0, i.e., 15kHz subcarrier spacing, 1 slot = 1ms; for μ = 1, i.e., 30kHz subcarrier spacing, 1 slot = 0.5ms; for μ = 2, i.e., 60kHz subcarrier spacing, 1 slot = 0.25ms, and so on. Definition of .

[0172] Figure 3 1 is a basic flow chart showing a method executed by a user equipment according to each of Embodiments 1 to 12 of the present disclosure.

[0173] Next, combine Figure 3 The basic flow chart shown is used to explain in detail the method executed by the user equipment in embodiments 1 to 12 of the present disclosure.

[0174] [Example 1]

[0175] like Figure 3 As shown, in the first embodiment of the present disclosure, the method executed by the user equipment may include:

[0176] In step S101, the sidelink communication user equipment determines configuration information of the sidelink communication.

[0177] Optionally, the sideline communication configuration information is configuration information sent by the base station via RRC signaling.

[0178] Optionally, the sideline communication configuration information is included in pre-configuration information of the user equipment.

[0179] Optionally, the side communication configuration information includes configuration information of a resource pool.

[0180] Optionally, the resource pool configuration information includes subchannel size information SubchannelSize. Optionally, the subchannel size information is in units of PRB.

[0181] Optionally, the resource pool configuration information includes information N of the number of sub-channels. subchannel .

[0182] Optionally, the resource pool configuration information includes a PSFCH period N. Optionally, the PSFCH period is in units of slots in the resource pool.

[0183] Optionally, the resource pool configuration information includes a feedback interval K (an interval from PSSCH to a corresponding PSFCH), and optionally, a unit of K is a time slot.

[0184] In step S102, the user equipment receives sideline communication control information SCI and corresponding PSSCH sent by other user equipments.

[0185] Optionally, the SCI sent by the other user equipment contains the SCI and the corresponding indication information that the PSSCH is unicast transmission. The implementation of the indication information includes but is not limited to the following:

[0186] Optionally, the SCI includes 2 bits of indication field indication information, or 1 bit of indication field indication information, indicating that the SCI and the corresponding PSSCH are unicast transmissions.

[0187] Optionally, the ID of the other user equipment contained in the SCI, and / or the ID of the user equipment, and / or the session (or link) ID of the transmission, indicate that the SCI and the corresponding PSSCH are unicast transmissions.

[0188] Optionally, the user equipment determines the index of the starting subchannel of the PSSCH according to the SCI. startSubchannel .

[0189] In step S103, the user equipment determines the resources of the PSFCH corresponding to the PSSCH.

[0190] Optionally, the number of bits of the HARQ feedback of the user equipment is x bits, and optionally, x=1, or 2, or a positive integer greater than 2.

[0191] Optionally, the PSFCH occupies n consecutive PRBs in the frequency domain, and optionally, n=1, or 2, or a positive integer greater than 2.

[0192] The time slot where the last OFDM symbol of the PSSCH is located is recorded as slot PSSCH .

[0193] Optionally, the user equipment PSSCH , and / or the K, and / or the N, and / or at least one of the information in the resource pool configuration information other than the N and the K (optionally, the configuration information of the time domain resources for the communication on the resource pool side), determine the time slot s where the PSFCH corresponding to the PSSCH is located. Optionally, a specific implementation method is that the interval between the time slot s where the PSFCH corresponding to the PSSCH is located and the time slot where the PSSCH is located (using slot as a unit) is not less than the K, and satisfies that the time slot s is not less than the smallest positive integer in the K, and the time slots contains a PSFCH resource with a configured period of N.

[0194] Optionally, the user equipment determines N consecutive time slots corresponding to the slot s according to the slot s, and / or the N, and / or the K, and / or at least one information other than the N and the K in the resource pool configuration information (optionally, the configuration information of the time domain resources of the resource pool side communication). Optionally, the PSFCH corresponding to the PSSCH received in the N consecutive time slots is in the slot s in the time domain.

[0195] Optionally, the user equipment determines the slot PSSCH It is the i+1th time slot among the N consecutive time slots, where i=0, 1, ..., N-1.

[0196] Optionally, the user equipment determines the number of PSFChoccasions (opportunities) on the time slot slot s according to the resource pool configuration information, expressed as PSFChoccasion.

[0197] Optionally, in the time slot, only one OFDM symbol in the time domain contains the PSFCH occasion, or, optionally, more than one OFDM symbol in the time domain contains the PSFCH occasion.

[0198] Optionally, the user equipment determines the number of the PSFCH resource on the time slot slot s, expressed as number 0 to number PSFChoccasion*12n-1. Optionally, if the PSFCH resource number k+1 and the PSFCH resource number k belong to the same PSFCH occasion, then the cyclic shift corresponding to the PSFCH resource number k+1 is equal to the cyclic shift corresponding to the PSFCH resource number k plus 1. Wherein, k is a non-negative integer.

[0199] Optionally, the user equipment determines the index according to the i and / or the index. startSubchannel Determine the resources of PSFCH, or determine the resource number of PSFCH.

[0200] Optionally, if the number of bits of the HARQ feedback of the user equipment is 1 bit, then, optionally, the user equipment determines that the number of the PSFCH resource for feeding back the HARQ ACK is Index startSubchannel ×(2 or, 12n)+i×N subchannel ×(2 or 12n), the user equipment determines that the PSFCH resource number for feeding back HARQ NACK is Index startSubchannel ×(2 or, 12n)+i×N subchannel ×(2 or 12n)+1, or, optionally, the user equipment determines that the number of the PSFCH resource for feedback HARQ NACK is Index startSubchannel ×(2 or, 12n)+i×N subchannel ×(2 or, 12n)+12n / 2. Or, optionally, the user equipment determines that the number of the PSFCH resource for feeding back the HARQ NACK is Index startSubchannel ×(2 or, 12n)+i×N subchannel ×(2 or 12n), optionally, the user equipment determines that the number of the PSFCH resource for feedback HARQ ACK is Index startSubchannel ×(2 or, 12n)+i×N subchannel ×(2 or 12n)+1, or, optionally, the user equipment determines that the number of the PSFCH resource for feeding back HARQ ACK is Index startSubchannel ×(2 or, 12n)+i×N subchannel ×(2 or, 12n)+12n / 2.

[0201] or,

[0202] Optionally, if the number of bits of the HARQ feedback of the user equipment is 2 bits, then, optionally, the user equipment determines that the number of the PSFCH resource of the feedback "00" is IndexstartSubchannel ×(4 or, 12n)+i×N subchannel ×(4 or 12n), optionally, the user does not determine the number of the PSFCH resource of the feedback "01" as Index startSubchannel ×(4 or, 12n)+i×N subchannel ×(4 or 12n)+1, or, optionally, the user equipment determines that the number of the PSFCH resource of feedback "01" is Index startSubchannel ×(4 or, 12n)+i×N subchannel ×(4 or 12n)+12n / 4, optionally, the user equipment determines that the number of the PSFCH resource of feedback "11" is Index startSubchannel ×(4 or, 12n)+i×N subchannel ×(4 or 12n)+2, or, optionally, the user equipment determines that the number of the PSFCH resource of feedback "11" is Index startSubchannel ×(4 or, 12n)+i×N subchannel ×(4 or, 12n)+2×12n / 4, optionally, the user equipment determines that the number of the PSFCH resource of feedback "10" is Index startSubchannel ×(4 or, 12n)+i×N subchannel ×(4 or 12n)+3, or, optionally, the user equipment determines that the number of the PSFCH resource of feedback "10" is Index startSubchannel ×(4 or, 12n)+i×N subchannel ×

[0203] (4 or, 12n)+3×12n / 4. The numbers of the PSFCH resources corresponding to “00”, “01”, “11” and “10” include but are not limited to the above-mentioned implementation manners.

[0204] [Example 2]

[0205] like Figure 3 As shown, in the second embodiment of the present disclosure, the method executed by the user equipment may include:

[0206] In step S101, the sidelink communication user equipment determines configuration information of the sidelink communication.

[0207] Optionally, the sideline communication configuration information is configuration information sent by the base station via RRC signaling.

[0208] Optionally, the sideline communication configuration information is included in pre-configuration information of the user equipment.

[0209] Optionally, the side communication configuration information includes configuration information of a resource pool.

[0210] Optionally, the resource pool configuration information includes subchannel size information SubchannelSize. Optionally, the subchannel size information is in units of PRB.

[0211] Optionally, the resource pool configuration information includes information N of the number of sub-channels. subchannel .

[0212] Optionally, the resource pool configuration information includes a PSFCH period N. Optionally, the PSFCH period is in units of slots in the resource pool.

[0213] Optionally, the resource pool configuration information includes an interval K from the PSSCH to the corresponding PSFCH, and optionally, the unit of K is a time slot.

[0214] In step S102, the user equipment receives sideline communication control information SCI and corresponding PSSCH sent by other user equipments.

[0215] Optionally, the SCI sent by the other user equipment contains the SCI and the corresponding indication information that the PSSCH is unicast transmission. The implementation of the indication information includes but is not limited to the following:

[0216] Optionally, the SCI includes 2 bits of indication field indication information, or 1 bit of indication field indication information, indicating that the SCI and the corresponding PSSCH are unicast transmissions.

[0217] Optionally, the ID of the other user equipment contained in the SCI, and / or the ID of the user equipment, and / or the session (or link) ID of the transmission, indicate that the SCI and the corresponding PSSCH are unicast transmissions.

[0218] Optionally, the user equipment determines the index of the starting subchannel of the PSSCH according to the SCI. startSubchannel .

[0219] In step S103, the user equipment determines the resources of the PSFCH corresponding to the PSSCH.

[0220] Optionally, the number of bits of the HARQ feedback of the user equipment is x bits, and optionally, x=1, or 2, or a positive integer greater than 2.

[0221] Optionally, the PSFCH occupies n consecutive PRBs in the frequency domain, and optionally, n=1, or 2, or a positive integer greater than 2.

[0222] The time slot where the last OFDM symbol of the PSSCH is located is recorded as slot PSSCH .

[0223] Optionally, the user equipment PSSCH , and / or the K, and / or the N, and / or at least one information in the resource pool configuration information other than the N and the K (optionally, the configuration information of the time domain resources for the communication on the resource pool side), determine the time slot s where the PSFCH corresponding to the PSSCH is located. Optionally, a specific implementation method is that the interval between the time slot s where the PSFCH corresponding to the PSSCH is located and the time slot where the PSSCH is located (using slot as a unit) is not less than the K, and satisfies that the time slot s is not less than the smallest positive integer in the K, and the time slot s contains a PSFCH resource with a configured period of the N.

[0224] Optionally, the user equipment determines N consecutive time slots corresponding to the slot s according to the slot s, and / or the N, and / or the K, and / or at least one information other than the N and the K in the resource pool configuration information (optionally, the configuration information of the time domain resources of the resource pool side communication). Optionally, the PSFCH corresponding to the PSSCH received in the N consecutive time slots is in the slot s in the time domain.

[0225] Optionally, the user equipment determines the slot PSSCH It is the i+1th time slot among the N consecutive time slots, where i=0, 1, ..., N-1.

[0226] Optionally, the user equipment determines the number of PSFChoccasions (opportunities) on the time slot slot s according to the resource pool configuration information, expressed as PSFChoccasion.

[0227] Optionally, in the time slot, only one OFDM symbol in the time domain contains the PSFCH occasion, or, optionally, more than one OFDM symbol in the time domain contains the PSFCH occasion.

[0228] Optionally, the user equipment determines the number of the PSFCH resource on the time slot slot s, expressed as number 0 to number PSFChoccasion*12n-1. Optionally, if the PSFCH resource number k+1 and the PSFCH resource number k belong to the same PSFCH occasion, then the cyclic shift corresponding to the PSFCH resource number k+1 is equal to the cyclic shift corresponding to the PSFCH resource number k plus 1. Wherein, k is a non-negative integer.

[0229] Optionally, the user equipment determines the index according to the i and / or the index. startSubchannel Determine the resources of PSFCH, or determine the resource number of PSFCH.

[0230] Optionally, if the number of bits of the HARQ feedback of the user equipment is 1 bit, then, optionally, the user equipment determines that the number of the PSFCH resource for feeding back the HARQ ACK is Index startSubchannel ×(2 or, 12n)+i×PSFCHoccasion×12n / N, optionally, the user equipment determines that the number of the PSFCH resource for feedback HARQ NACK is Index startSubchannel ×(2 or, 12n)+i×PSFCHoccasion×12n / N+1, or, optionally, the user equipment determines that the number of the PSFCH resource for feeding back HARQ NACK is Index startSubchannel ×(2 or, 12n)+i×PSFCHoccasion×12n / N+12n / 2. Or, optionally, the user equipment determines that the number of the PSFCH resource for feeding back HARQ NACK is Index startSubchannel ×(2 or, 12n)+i×PSFCHoccasion×12n / N, Optionally, the user equipment determines that the number of the PSFCH resource for feedback HARQ ACK is Index startSubchannel ×(2 or, 12n)+i×PSFChoccasion×12n / N+1, or, optionally, the user equipment determines that the number of the PSFCH resource for feedback HARQ ACK is Index startSubchannel ×(2 or, 12n)+i×PSFCHoccasion×12n / N+12n / 2.

[0231] or,

[0232] Optionally, if the number of bits of the HARQ feedback of the user equipment is 2 bits, then, optionally, the user equipment determines that the number of the PSFCH resource of the feedback "00" is Index startSubchannel×(4 or 12n)+i×PSFCHoccasion×12n / N, optionally, the user equipment determines the number Index of the PSFCH resource of feedback "01" startSubchannel ×(4 or 12n)+i×PSFChoccasion×12n / N+1, or, optionally, the user equipment determines the number Index of the PSFCH resource of feedback "01" startSubchannel ×(4 or, 12n)+i×PSFCHoccasion×12n / N+12n / 4, optionally, the user equipment determines that the number of the PSFCH resource of feedback "11" is Indexs tartSubchannel ×(4 or 12n)+i×PSFChoccasion×12n / N+2, or, optionally, the user equipment determines the number of the PSFCH resource of feedback "11" Optionally, the user equipment determines that the number of the PSFCH resource of feedback "10" is Index startsubchannel ×(4 or 12n)+i×PSFChoccasion×12n / N+3, or, optionally, the user equipment determines the number of the PSFCH resource to feedback "10" The PSFCH resource numbers corresponding to "00", "01", "11" and "10" include but are not limited to the above-mentioned implementation methods.

[0233] [Example 3]

[0234] like Figure 3 As shown, in the third embodiment of the present disclosure, the method executed by the user equipment may include:

[0235] In step S101, the sidelink communication user equipment determines configuration information of the sidelink communication.

[0236] Optionally, the sideline communication configuration information is configuration information sent by the base station via RRC signaling.

[0237] Optionally, the sideline communication configuration information is included in pre-configuration information of the user equipment.

[0238] Optionally, the side communication configuration information includes configuration information of a resource pool.

[0239] Optionally, the resource pool configuration information includes subchannel size information SubchannelSize. Optionally, the subchannel size information is in units of PRB.

[0240] Optionally, the resource pool configuration information includes information N of the number of sub-channels. subchannel .

[0241] Optionally, the resource pool configuration information includes a PSFCH period N. Optionally, the PSFCH period is in units of slots in the resource pool.

[0242] Optionally, the resource pool configuration information includes an interval K from the PSSCH to the corresponding PSFCH, and optionally, the unit of K is a time slot.

[0243] Optionally, the resource pool configuration information includes configuration information that the side communication in the resource pool is unicast.

[0244] In step S102, the user equipment receives sideline communication control information SCI and corresponding PSSCH sent by other user equipments.

[0245] Optionally, the user equipment determines the index of the starting subchannel of the PSSCH according to the SCI. startSubchannel .

[0246] In step S103, the user equipment determines the resources of the PSFCH corresponding to the PSSCH.

[0247] Optionally, the number of bits of the HARQ feedback of the user equipment is x bits, and optionally, x=1, or 2, or a positive integer greater than 2.

[0248] Optionally, the PSFCH occupies n consecutive PRBs in the frequency domain, and optionally, n=1, or 2, or a positive integer greater than 2.

[0249] The time slot where the last OFDM symbol of the PSSCH is located is recorded as slot PSSCH .

[0250] Optionally, the user equipment PSSCH, and / or the K, and / or the N, and / or at least one information in the resource pool configuration information other than the N and the K (optionally, the configuration information of the time domain resources for the communication on the resource pool side), determine the time slot s where the PSFCH corresponding to the PSSCH is located. Optionally, a specific implementation method is that the interval between the time slot s where the PSFCH corresponding to the PSSCH is located and the time slot where the PSSCH is located (using slot as a unit) is not less than the K, and satisfies that the time slot s is not less than the smallest positive integer in the K, and the time slot s contains a PSFCH resource with a configured period of the N.

[0251] Optionally, the user equipment determines N consecutive time slots corresponding to the slot s according to the slot s, and / or the N, and / or the K, and / or at least one information other than the N and the K in the resource pool configuration information (optionally, the configuration information of the time domain resources of the resource pool side communication). Optionally, the PSFCH corresponding to the PSSCH received in the N consecutive time slots is in the slot s in the time domain.

[0252] Optionally, the user equipment determines the slot PSSCH It is the i+1th time slot among the N consecutive time slots, where i=0, 1, ..., N-1.

[0253] Optionally, the user equipment determines the number of PSFChoccasions (opportunities) on the time slot slot s according to the resource pool configuration information, expressed as PSFChoccasion.

[0254] Optionally, in the time slot, only one OFDM symbol in the time domain contains the PSFCH occasion, or, optionally, more than one OFDM symbol in the time domain contains the PSFCH occasion.

[0255] Optionally, the user equipment determines the number of the PSFCH resource on the time slot slot s, expressed as number 0 to number PSFChoccasion*12n-1. Optionally, if the PSFCH resource number k+1 and the PSFCH resource number k belong to the same PSFCH occasion, then the cyclic shift corresponding to the PSFCH resource number k+1 is equal to the cyclic shift corresponding to the PSFCH resource number k plus 1. Wherein, k is a non-negative integer.

[0256] Optionally, the user equipment determines the index according to the i and / or the index. startSubchannelDetermine the resources of PSFCH, or determine the resource number of PSFCH.

[0257] Optionally, if the number of bits of the HARQ feedback of the user equipment is 1 bit, then, optionally, the user equipment determines that the number of the PSFCH resource for feeding back the HARQ ACK is Index startSubchannel ×(2 or, 12n)+i×N subchannel ×

[0258] (2 or 12n), the user equipment determines that the number of the PSFCH resource for feeding back HARQ NACK is Index startSubchannel ×(2 or, 12n)+i×N subchannel ×(2 or 12n)+1, or, optionally, the user equipment determines that the number of the PSFCH resource for feeding back HARQ NACK is Index startSubchannel ×(2 or, 12n)+i×N subchannel ×(2 or, 12n)+12n / 2. Or, optionally, the user equipment determines that the number of the PSFCH resource for feeding back the HARQ NACK is Index startSubchannel ×(2 or, 12n)+i×N subchannel ×(2 or 12n), optionally, the user equipment determines that the number of the PSFCH resource for feedback HARQ ACK is Index startSubchannel ×(2 or, 12n)+i×N subchannel ×(2 or 12n)+1, or, optionally, the user equipment determines that the number of the PSFCH resource for feeding back HARQ ACK is Index startSubchannel ×(2 or, 12n)+i×N subchannel ×(2 or, 12n)+12n / 2.

[0259] or,

[0260] Optionally, if the number of bits of the HARQ feedback of the user equipment is 2 bits, then, optionally, the user equipment determines that the number of the PSFCH resource of the feedback "00" is Index startSubchannel ×(4 or, 12n)+i×N subchannel ×(4 or 12n), optionally, the user equipment determines that the number of the PSFCH resource of feedback "01" is Index startSubchannel ×(4 or, 12n)+i×N subchannel ×(4 or 12n)+1, or, optionally, the user equipment determines that the number of the PSFCH resource of feedback "01" is Index startSubchannel ×(4 or, 12n)+i×Nsubchannel ×(4 or 12n)+12n / 4, optionally, the user equipment determines that the number of the PSFCH resource of feedback "11" is Index startSubchannel ×(4 or, 12n)+i×N subchannel ×(4 or 12n)+2, or, optionally, the user equipment determines that the number of the PSFCH resource of feedback "11" is Index startSubchannel ×(4 or, 12n)+i×N subchannel ×(4 or, 12n)+2×12n / 4, optionally, the user equipment determines that the number of the PSFCH resource of feedback "10" is Index startSubchannel ×(4 or, 12n)+i×N subchannel ×(4 or 12n)+3, or, optionally, the user equipment determines that the number of the PSFCH resource of feedback "10" is Index startSubchannel ×(4 or, 12n)+i×N subchannel ×(4 or, 12n)+3×12n / 4. The numbers of the PSFCH resources corresponding to "00", "01", "11" and "10" include but are not limited to the above implementation manners.

[0261] [Example 4]

[0262] like Figure 3 As shown, in the fourth embodiment of the present disclosure, the method executed by the user equipment may include:

[0263] In step S101, the sidelink communication user equipment determines configuration information of the sidelink communication.

[0264] Optionally, the sideline communication configuration information is configuration information sent by the base station via RRC signaling.

[0265] Optionally, the sideline communication configuration information is included in pre-configuration information of the user equipment.

[0266] Optionally, the side communication configuration information includes configuration information of a resource pool.

[0267] Optionally, the resource pool configuration information includes subchannel size information SubchannelSize. Optionally, the subchannel size information is in units of PRB.

[0268] Optionally, the resource pool configuration information includes information N of the number of sub-channels. subchannel .

[0269] Optionally, the resource pool configuration information includes a PSFCH period N. Optionally, the PSFCH period is in units of slots in the resource pool.

[0270] Optionally, the resource pool configuration information includes an interval K from the PSSCH to the corresponding PSFCH, and optionally, the unit of K is a time slot.

[0271] Optionally, the resource pool configuration information includes configuration information that the side communication in the resource pool is unicast.

[0272] In step S102, the user equipment receives sideline communication control information SCI and corresponding PSSCH sent by other user equipments.

[0273] Optionally, the user equipment determines the index of the starting subchannel of the PSSCH according to the SCI. startSubchannel .

[0274] In step S103, the user equipment determines the resources of the PSFCH corresponding to the PSSCH.

[0275] Optionally, the number of bits of the HARQ feedback of the user equipment is x bits, and optionally, x=1, or 2, or a positive integer greater than 2.

[0276] Optionally, the PSFCH occupies n consecutive PRBs in the frequency domain, and optionally, n=1, or 2, or a positive integer greater than 2.

[0277] The time slot where the last OFDM symbol of the PSSCH is located is recorded as slot PSSCH .

[0278] Optionally, the user equipment PSSCH , and / or the K, and / or the N, and / or at least one information in the resource pool configuration information other than the N and the K (optionally, the configuration information of the time domain resources for the communication on the resource pool side), determine the time slot s where the PSFCH corresponding to the PSSCH is located. Optionally, a specific implementation method is that the interval between the time slot s where the PSFCH corresponding to the PSSCH is located and the time slot where the PSSCH is located (using slot as a unit) is not less than the K, and satisfies that the time slot s is not less than the smallest positive integer in the K, and the time slot s contains a PSFCH resource with a configured period of the N.

[0279] Optionally, the user equipment determines N consecutive time slots corresponding to the slot s according to the slot s, and / or the N, and / or the K, and / or at least one information other than the N and the K in the resource pool configuration information (optionally, the configuration information of the time domain resources of the resource pool side communication). Optionally, the PSFCH corresponding to the PSSCH received in the N consecutive time slots is in the slot s in the time domain.

[0280] Optionally, the user equipment determines the slot PSSCH It is the i+1th time slot among the N consecutive time slots, where i=0, 1, ..., N-1.

[0281] Optionally, the user equipment determines the number of PSFChoccasions (opportunities) on the time slot slot s according to the resource pool configuration information, expressed as PSFChoccasion.

[0282] Optionally, in the time slot, only one OFDM symbol in the time domain contains the PSFCH occasion, or, optionally, more than one OFDM symbol in the time domain contains the PSFCH occasion.

[0283] Optionally, the user equipment determines the number of the PSFCH resource on the time slot slot s, expressed as number 0 to number PSFChoccasion*12n-1. Optionally, if the PSFCH resource number k+1 and the PSFCH resource number k belong to the same PSFCH occasion, then the cyclic shift corresponding to the PSFCH resource number k+1 is equal to the cyclic shift corresponding to the PSFCH resource number k plus 1. Wherein, k is a non-negative integer.

[0284] Optionally, the user equipment determines the index according to the i and / or the index. startSubchannel Determine the resources of PSFCH, or determine the resource number of PSFCH.

[0285] Optionally, if the number of bits of the HARQ feedback of the user equipment is 1 bit, then, optionally, the user equipment determines that the number of the PSFCH resource for feeding back the HARQ ACK is Index startSubchannel ×(2 or, 12n)+i×PSFCHoccasion×12n / N, optionally, the user equipment determines that the number of the PSFCH resource for feedback HARQ NACK is Index startSubchannel×(2 or, 12n)+i×PSFCHoccasion×12n / N+1, or, optionally, the user equipment determines that the number of the PSFCH resource for feeding back HARQ NACK is Index startSubchannel ×(2 or, 12n)+i×PSFCHoccasion×12n / N+12n / 2. Or, optionally, the user equipment determines that the number of the PSFCH resource for feeding back HARQ NACK is Index startSubchannel ×(2 or, 12n)+i×PSFCHoccasion×12n / N, Optionally, the user equipment determines that the number of the PSFCH resource for feedback HARQ ACK is Index startSubchannel ×(2 or, 12n)+i×PSFChoccasion×12n / N+1, or, optionally, the user equipment determines that the number of the PSFCH resource for feedback HARQ ACK is Index startSubchannel ×(2 or, 12n)+i×PSFCHoccasion×12n / N+12n / 2.

[0286] or,

[0287] Optionally, if the number of bits of the HARQ feedback of the user equipment is 2 bits, then, optionally, the user equipment determines that the number of the PSFCH resource of the feedback "00" is Index startSubchannel ×(4 or, 12n)+i×PSFCHoccasion×12n / N, optionally, the user equipment determines the number Index of the PSFCH resource of feedback "01" startSubchannel ×(4 or 12n)+i×PSFCHoccasion×12n / N+1, or, optionally, the user equipment determines the number Index of the PSFCH resource of feedback "01" startSubchannel ×(4 or, 12n)+i×PSFCHoccasion×12n / N+12n / 4, optionally, the user equipment determines that the number of the PSFCH resource of feedback "11" is Index startSubchannel ×(4 or 12n)+i×PSFChoccasion×12n / N+2, or, optionally, the user equipment determines the number of the PSFCH resource of feedback "11" Optionally, the user equipment determines that the number of the PSFCH resource of feedback "10" is Index startSubchannel ×(4 or 12n)+i×PSFChoccasion×12n / N+3, or, optionally, the user equipment determines the number of the PSFCH resource to feedback "10" The PSFCH resource numbers corresponding to "00", "01", "11" and "10" include but are not limited to the above-mentioned implementation methods.

[0288] [Example 5]

[0289] like Figure 3 As shown, in Embodiment 5 of the present disclosure, the method executed by the user equipment may include:

[0290] In step S101, the sidelink communication user equipment determines configuration information of the sidelink communication.

[0291] Optionally, the sideline communication configuration information is configuration information sent by the base station via RRC signaling.

[0292] Optionally, the sideline communication configuration information is included in pre-configuration information of the user equipment.

[0293] Optionally, the side communication configuration information includes configuration information of a resource pool.

[0294] Optionally, the resource pool configuration information includes subchannel size information SubchannelSize. Optionally, the subchannel size information is in units of PRB.

[0295] Optionally, the resource pool configuration information includes information N of the number of sub-channels. subchannel .

[0296] Optionally, the resource pool configuration information includes a PSFCH period N. Optionally, the PSFCH period is in units of slots in the resource pool.

[0297] Optionally, the resource pool configuration information includes an interval K from the PSSCH to the corresponding PSFCH, and optionally, the unit of K is a time slot.

[0298] Optionally, the resource pool configuration information includes configuration information that the receiving UE only feeds back HARQ NACK.

[0299] In step S102, the user equipment receives sideline communication control information SCI and corresponding PSSCH sent by other user equipments.

[0300] Optionally, the SCI sent by the other user equipment contains the SCI and the corresponding PSSCH indication information that they are multicast transmissions. The implementation methods of the indication information include but are not limited to the following:

[0301] Optionally, the SCI includes 2 bits of indication field indication information, or 1 bit of indication field indication information, indicating that the SCI and the corresponding PSSCH are multicast transmissions.

[0302] Optionally, the ID of the other user equipment contained in the SCI, and / or the ID of the user equipment, and / or the session (or link) ID of the transmission, indicate that the SCI and the corresponding PSSCH are multicast transmissions.

[0303] Optionally, the user equipment determines the index of the starting subchannel of the PSSCH according to the SCI. startSubchannel .

[0304] In step S103, the user equipment determines the resources of the PSFCH corresponding to the PSSCH.

[0305] Optionally, the number of bits of the HARQ feedback of the user equipment is x bits, and optionally, x=1, or 2, or a positive integer greater than 2.

[0306] Optionally, the PSFCH occupies n consecutive PRBs in the frequency domain, and optionally, n=1, or 2, or a positive integer greater than 2.

[0307] The time slot where the last OFDM symbol of the PSSCH is located is recorded as slot PSSCH .

[0308] Optionally, the user equipment PSSCH , and / or the K, and / or the N, and / or at least one of the information in the resource pool configuration information other than the N and the K (optionally, the configuration information of the time domain resources for the communication on the resource pool side), determine the time slot s where the PSFCH corresponding to the PSSCH is located. Optionally, a specific implementation method is that the interval between the time slot s where the PSFCH corresponding to the PSSCH is located and the time slot where the PSSCH is located (using slot as a unit) is not less than the K, and satisfies that the time slot s is not less than the smallest positive integer in the K, and the time slot s contains a PSFCH resource with a configured period of N.

[0309] Optionally, the user equipment determines N consecutive time slots corresponding to the slot s according to the slot s, and / or the N, and / or the K, and / or at least one information other than the N and the K in the resource pool configuration information (optionally, the configuration information of the time domain resources of the resource pool side communication). Optionally, the PSFCH corresponding to the PSSCH received in the N consecutive time slots is in the slot s in the time domain.

[0310] Optionally, the user equipment determines the slot PSSCH It is the i+1th time slot among the N consecutive time slots, where i=0, 1, ..., N-1.

[0311] Optionally, the user equipment determines the number of PSFChoccasions (opportunities) on the time slot slot s according to the resource pool configuration information, expressed as PSFChoccasion.

[0312] Optionally, in the time slot, only one OFDM symbol in the time domain contains the PSFCH occasion, or, optionally, more than one OFDM symbol in the time domain contains the PSFCH occasion.

[0313] Optionally, the user equipment determines the number of the PSFCH resource on the time slot slot s, expressed as number 0 to number PSFChoccasion*12n-1. Optionally, if the PSFCH resource number k+1 and the PSFCH resource number k belong to the same PSFCH occasion, then the cyclic shift corresponding to the PSFCH resource number k+1 is equal to the cyclic shift corresponding to the PSFCH resource number k plus 1. Wherein, k is a non-negative integer.

[0314] Optionally, the user equipment determines the index according to the i and / or the index. startSubchannel Determine the resources of PSFCH, or determine the resource number of PSFCH.

[0315] Optionally, if the number of bits of the HARQ feedback of the user equipment is 1 bit, then, optionally, the user equipment determines that the number of the PSFCH resource for feeding back the HARQ NACK is Index startSubchannel +i×N subchannel .

[0316] or,

[0317] Optionally, if the number of bits of the HARQ feedback of the user equipment is 2 bits, then, optionally, the user equipment determines that the number of the PSFCH resource of the feedback "00" is IndexstartSubchannel +i×N subchannel , or, optionally, the user equipment determines that the number of the PSFCH resource of feedback "11" is Index startSubchannel +i×N subchannel .

[0318] or,

[0319] Optionally, the user equipment determines that the number of the PSFCH resource for feeding back the HARQ NACK is Index startSubchannel ×12n+i×N subchannel ×12n.

[0320] [Example 6]

[0321] like Figure 3 As shown, in Embodiment 6 of the present disclosure, the method executed by the user equipment may include:

[0322] In step S101, the sidelink communication user equipment determines configuration information of the sidelink communication.

[0323] Optionally, the sideline communication configuration information is configuration information sent by the base station via RRC signaling.

[0324] Optionally, the sideline communication configuration information is included in pre-configuration information of the user equipment.

[0325] Optionally, the side communication configuration information includes configuration information of a resource pool.

[0326] Optionally, the resource pool configuration information includes subchannel size information SubchannelSize. Optionally, the subchannel size information is in units of PRB.

[0327] Optionally, the resource pool configuration information includes information N of the number of sub-channels. subchannel .

[0328] Optionally, the resource pool configuration information includes a PSFCH period N. Optionally, the PSFCH period is in units of slots in the resource pool.

[0329] Optionally, the resource pool configuration information includes an interval K from the PSSCH to the corresponding PSFCH, and optionally, the unit of K is a time slot.

[0330] Optionally, the resource pool configuration information includes configuration information that the receiving UE only feeds back HARQ NACK.

[0331] In step S102, the user equipment receives sideline communication control information SCI and corresponding PSSCH sent by other user equipments.

[0332] Optionally, the SCI sent by the other user equipment contains the SCI and the corresponding PSSCH indication information that they are multicast transmissions. The implementation methods of the indication information include but are not limited to the following:

[0333] Optionally, the SCI includes 2 bits of indication field indication information, or 1 bit of indication field indication information, indicating that the SCI and the corresponding PSSCH are multicast transmissions.

[0334] Optionally, the ID of the other user equipment contained in the SCI, and / or the ID of the user equipment, and / or the session (or link) ID of the transmission, indicate that the SCI and the corresponding PSSCH are multicast transmissions.

[0335] Optionally, the user equipment determines the index of the starting subchannel of the PSSCH according to the SCI. startSubchannel .

[0336] In step S103, the user equipment determines the resources of the PSFCH corresponding to the PSSCH.

[0337] Optionally, the number of bits of the HARQ feedback of the user equipment is x bits, and optionally, x=1, or 2, or a positive integer greater than 2.

[0338] Optionally, the PSFCH occupies n consecutive PRBs in the frequency domain, and optionally, n=1, or 2, or a positive integer greater than 2.

[0339] The time slot where the last OFDM symbol of the PSSCH is located is recorded as slot PSSCH .

[0340] Optionally, the user equipment PSSCH, and / or the K, and / or the N, and / or at least one information in the resource pool configuration information other than the N and the K (optionally, the configuration information of the time domain resources for the communication on the resource pool side), determine the time slot s where the PSFCH corresponding to the PSSCH is located. Optionally, a specific implementation method is that the interval between the time slot s where the PSFCH corresponding to the PSSCH is located and the time slot where the PSSCH is located (using slot as a unit) is not less than the K, and satisfies that the time slot s is not less than the smallest positive integer in the K, and the time slot s contains a PSFCH resource with a configured period of the N.

[0341] Optionally, the user equipment determines N consecutive time slots corresponding to the slot s according to the slot s, and / or the N, and / or the K, and / or at least one information other than the N and the K in the resource pool configuration information (optionally, the configuration information of the time domain resources of the resource pool side communication). Optionally, the PSFCH corresponding to the PSSCH received in the N consecutive time slots is in the slot s in the time domain.

[0342] Optionally, the user equipment determines the slot PSSCH It is the i+1th time slot among the N consecutive time slots, where i=0, 1, ..., N-1.

[0343] Optionally, the user equipment determines the number of PSFChoccasions (opportunities) on the time slot slot s according to the resource pool configuration information, expressed as PSFChoccasion.

[0344] Optionally, in the time slot, only one OFDM symbol in the time domain contains the PSFCH occasion, or, optionally, more than one OFDM symbol in the time domain contains the PSFCH occasion.

[0345] Optionally, the user equipment determines the number of the PSFCH resource on the time slot slot s, expressed as number 0 to number PSFChoccasion*12n-1. Optionally, if the PSFCH resource number k+1 and the PSFCH resource number k belong to the same PSFCH occasion, then the cyclic shift corresponding to the PSFCH resource number k+1 is equal to the cyclic shift corresponding to the PSFCH resource number k plus 1. Wherein, k is a non-negative integer.

[0346] Optionally, the user equipment determines the index according to the i and / or the index. startSubchannelDetermine the resources of PSFCH, or determine the resource number of PSFCH.

[0347] Optionally, if the number of bits of the HARQ feedback of the user equipment is 1 bit, then, optionally, the user equipment determines that the number of the PSFCH resource for feeding back the HARQ NACK is Index startSubchannel +i×PSFChoccasion×12n / N,

[0348] or,

[0349] Optionally, if the number of bits of the HARQ feedback of the user equipment is 2 bits, then, optionally, the user equipment determines that the number of the PSFCH resource of the feedback "00" is Index startSubchannel +i×PSFCHoccasion×12n / N, or, optionally, the user equipment determines that the number of the PSFCH resource of feedback "11" is Index startSubchannel +i×PSFChoccasion×12n / N.

[0350] or,

[0351] Optionally, the user equipment determines that the number of the PSFCH resource for feeding back the HARQ NACK is Index startSubchannel ×12n+i×PSFCHoccasion×12n / N.

[0352] [Example 7]

[0353] like Figure 3 As shown, in Embodiment 7 of the present disclosure, the method executed by the user equipment may include:

[0354] In step S101, the sidelink communication user equipment determines configuration information of the sidelink communication.

[0355] Optionally, the sideline communication configuration information is configuration information sent by the base station via RRC signaling.

[0356] Optionally, the sideline communication configuration information is included in pre-configuration information of the user equipment.

[0357] Optionally, the side communication configuration information includes configuration information of a resource pool.

[0358] Optionally, the resource pool configuration information includes subchannel size information SubchannelSize. Optionally, the subchannel size information is in units of PRB.

[0359] Optionally, the resource pool configuration information includes information N of the number of sub-channels. subchannel .

[0360] Optionally, the resource pool configuration information includes a PSFCH period N. Optionally, the PSFCH period is in units of slots in the resource pool.

[0361] Optionally, the resource pool configuration information includes an interval K from the PSSCH to the corresponding PSFCH, and optionally, the unit of K is a time slot.

[0362] Optionally, the resource pool configuration information includes configuration information that the side communication in the resource pool is multicast.

[0363] Optionally, the resource pool configuration information includes configuration information that the receiving UE only feeds back HARQ NACK.

[0364] In step S102, the user equipment receives sideline communication control information SCI and corresponding PSSCH sent by other user equipments.

[0365] Optionally, the user equipment determines the index of the starting subchannel of the PSSCH according to the SCI. startSubchannel .

[0366] In step S103, the user equipment determines the resources of the PSFCH corresponding to the PSSCH.

[0367] Optionally, the number of bits of the HARQ feedback of the user equipment is x bits, and optionally, x=1, or 2, or a positive integer greater than 2.

[0368] Optionally, the PSFCH occupies n consecutive PRBs in the frequency domain, and optionally, n=1, or 2, or a positive integer greater than 2.

[0369] The time slot where the last OFDM symbol of the PSSCH is located is recorded as slot PSSCH .

[0370] Optionally, the user equipment PSSCH, and / or the K, and / or the N, and / or at least one information in the resource pool configuration information other than the N and the K (optionally, the configuration information of the time domain resources for the communication on the resource pool side), determine the time slot s where the PSFCH corresponding to the PSSCH is located. Optionally, a specific implementation method is that the interval between the time slot s where the PSFCH corresponding to the PSSCH is located and the time slot where the PSSCH is located (using slot as a unit) is not less than the K, and satisfies that the time slot s is not less than the smallest positive integer in the K, and the time slot s contains a PSFCH resource with a configured period of the N.

[0371] Optionally, the user equipment determines N consecutive time slots corresponding to the slot s according to the slot s, and / or the N, and / or the K, and / or at least one information other than the N and the K in the resource pool configuration information (optionally, the configuration information of the time domain resources of the resource pool side communication). Optionally, the PSFCH corresponding to the PSSCH received in the N consecutive time slots is in the slot s in the time domain.

[0372] Optionally, the user equipment determines the slot PSSCH It is the i+1th time slot among the N consecutive time slots, where i=0, 1, ..., N-1.

[0373] Optionally, the user equipment determines the number of PSFChoccasions (opportunities) on the time slot slot s according to the resource pool configuration information, expressed as PSFChoccasion.

[0374] Optionally, in the time slot, only one OFDM symbol in the time domain contains the PSFCH occasion, or, optionally, more than one OFDM symbol in the time domain contains the PSFCH occasion.

[0375] Optionally, the user equipment determines the number of the PSFCH resource on the time slot slot s, expressed as number 0 to number PSFChoccasion*12n-1. Optionally, if the PSFCH resource number k+1 and the PSFCH resource number k belong to the same PSFCH occasion, then the cyclic shift corresponding to the PSFCH resource number k+1 is equal to the cyclic shift corresponding to the PSFCH resource number k plus 1. Wherein, k is a non-negative integer.

[0376] Optionally, the user equipment determines the index according to the i and / or the index. startSubchannelDetermine the resources of PSFCH, or determine the resource number of PSFCH.

[0377] Optionally, if the number of bits of the HARQ feedback of the user equipment is 1 bit, then, optionally, the user equipment determines that the number of the PSFCH resource for feeding back the HARQ NACK is Index startSubchannel +i×N subchannel .

[0378] or,

[0379] Optionally, if the number of bits of the HARQ feedback of the user equipment is 2 bits, then, optionally, the user equipment determines that the number of the PSFCH resource of the feedback "00" is Index startSubchannel +i×N subchannel , or, optionally, the user equipment determines that the number of the PSFCH resource of feedback "11" is Index startSubchannel +i×N subchannel .

[0380] or,

[0381] Optionally, the user device determines that the number of the PSFCH resource for feeding back the HARQ NACK is Index startSubchannel ×12n+i×N subchannel ×12n.

[0382] [Embodiment 8]

[0383] like Figure 3 As shown, in Embodiment 8 of the present disclosure, the method executed by the user equipment may include:

[0384] In step S101, the sidelink communication user equipment determines configuration information of the sidelink communication.

[0385] Optionally, the sideline communication configuration information is configuration information sent by the base station via RRC signaling.

[0386] Optionally, the sideline communication configuration information is included in pre-configuration information of the user equipment.

[0387] Optionally, the side communication configuration information includes configuration information of a resource pool.

[0388] Optionally, the resource pool configuration information includes subchannel size information SubchannelSize. Optionally, the subchannel size information is in units of PRB.

[0389] Optionally, the resource pool configuration information includes information N of the number of sub-channels. subchannel .

[0390] Optionally, the resource pool configuration information includes a PSFCH period N. Optionally, the PSFCH period is in units of slots in the resource pool.

[0391] Optionally, the resource pool configuration information includes an interval K from the PSSCH to the corresponding PSFCH, and optionally, the unit of K is a time slot.

[0392] Optionally, the resource pool configuration information includes configuration information that the side communication in the resource pool is multicast.

[0393] Optionally, the resource pool configuration information includes configuration information that the receiving UE only feeds back HARQ NACK.

[0394] In step S102, the user equipment receives sideline communication control information SCI and corresponding PSSCH sent by other user equipments.

[0395] Optionally, the user equipment determines the index of the starting subchannel of the PSSCH according to the SCI. startSubchannel .

[0396] In step S103, the user equipment determines the resources of the PSFCH corresponding to the PSSCH.

[0397] Optionally, the number of bits of the HARQ feedback of the user equipment is x bits, and optionally, x=1, or 2, or a positive integer greater than 2.

[0398] Optionally, the PSFCH occupies n consecutive PRBs in the frequency domain, and optionally, n=1, or 2, or a positive integer greater than 2.

[0399] The time slot where the last OFDM symbol of the PSSCH is located is recorded as slot PSSCH .

[0400] Optionally, the user equipment PSSCH, and / or the K, and / or the N, and / or at least one information in the resource pool configuration information other than the N and the K (optionally, the configuration information of the time domain resources for the communication on the resource pool side), determine the time slot s where the PSFCH corresponding to the PSSCH is located. Optionally, a specific implementation method is that the interval between the time slot s where the PSFCH corresponding to the PSSCH is located and the time slot where the PSSCH is located (using slot as a unit) is not less than the K, and satisfies that the time slot s is not less than the smallest positive integer in the K, and the time slot s contains a PSFCH resource with a configured period of the N.

[0401] Optionally, the user equipment determines N consecutive time slots corresponding to the slot s according to the slot s, and / or the N, and / or the K, and / or at least one information other than the N and the K in the resource pool configuration information (optionally, the configuration information of the time domain resources of the resource pool side communication). Optionally, the PSFCH corresponding to the PSSCH received in the N consecutive time slots is in the slot s in the time domain.

[0402] Optionally, the user equipment determines the slot PSSCH It is the i+1th time slot among the N consecutive time slots, where i=0, 1, ..., N-1.

[0403] Optionally, the user equipment determines the number of PSFChoccasions (opportunities) on the time slot slot s according to the resource pool configuration information, expressed as PSFChoccasion.

[0404] Optionally, in the time slot, only one OFDM symbol in the time domain contains the PSFCH occasion, or, optionally, more than one OFDM symbol in the time domain contains the PSFCH occasion.

[0405] Optionally, the user equipment determines the number of the PSFCH resource on the time slot slot s, expressed as number 0 to number PSFChoccasion*12n-1. Optionally, if the PSFCH resource number k+1 and the PSFCH resource number k belong to the same PSFCH occasion, then the cyclic shift corresponding to the PSFCH resource number k+1 is equal to the cyclic shift corresponding to the PSFCH resource number k plus 1. Wherein, k is a non-negative integer.

[0406] Optionally, the user equipment determines the index according to the i and / or the index. startSubchannelDetermine the resources of PSFCH, or determine the resource number of PSFCH.

[0407] Optionally, if the number of bits of the HARQ feedback of the user equipment is 1 bit, then, optionally, the user equipment determines that the number of the PSFCH resource for feeding back the HARQ NACK is Index startSubchannel +i×PSFChoccasion×12n / N,

[0408] or,

[0409] Optionally, if the number of bits of the HARQ feedback of the user equipment is 2 bits, then, optionally, the user equipment determines that the number of the PSFCH resource of the feedback "00" is Index startSubchannel +i×PSFCHoccasion×12n / N, or, optionally, the user equipment determines that the number of the PSFCH resource of feedback "11" is Index startSubchannel +i×PSFChoccasion×12n / N.

[0410] or,

[0411] Optionally, the user equipment determines that the number of the PSFCH resource for feeding back the HARQ NACK is Index startSubchannel ×12n+i×PSFCHoccasion×12n / N.

[0412] [Example 9]

[0413] like Figure 3 As shown, in Embodiment 9 of the present disclosure, the method executed by the user equipment may include:

[0414] In step S101, the sidelink communication user equipment determines configuration information of the sidelink communication.

[0415] Optionally, the sideline communication configuration information is configuration information sent by the base station via RRC signaling.

[0416] Optionally, the sideline communication configuration information is included in pre-configuration information of the user equipment.

[0417] Optionally, the side communication configuration information includes configuration information of a resource pool.

[0418] Optionally, the resource pool configuration information includes subchannel size information SubchannelSize. Optionally, the subchannel size information is in units of PRB.

[0419] Optionally, the resource pool configuration information includes information N of the number of sub-channels. subchannel .

[0420] Optionally, the resource pool configuration information includes a PSFCH period N. Optionally, the PSFCH period is in units of slots in the resource pool.

[0421] Optionally, the resource pool configuration information includes an interval K from the PSSCH to the corresponding PSFCH, and optionally, the unit of K is a time slot.

[0422] Optionally, the resource pool configuration information includes configuration information for receiving UE feedback HARQ ACK and HARQ NACK.

[0423] In step S102, the user equipment receives sideline communication control information SCI and corresponding PSSCH sent by other user equipments.

[0424] Optionally, the SCI sent by the other user equipment contains the SCI and the corresponding PSSCH indication information that they are multicast transmissions. The implementation methods of the indication information include but are not limited to the following:

[0425] Optionally, the SCI includes 2 bits of indication field indication information, or 1 bit of indication field indication information, indicating that the SCI and the corresponding PSSCH are multicast transmissions.

[0426] Optionally, the ID of the other user equipment contained in the SCI, and / or the ID of the user equipment, and / or the session (or link) ID of the transmission, indicate that the SCI and the corresponding PSSCH are multicast transmissions.

[0427] Optionally, the user equipment determines the index of the starting subchannel of the PSSCH according to the SCI. startSubchannel .

[0428] In step S103, the user equipment determines the resources of the PSFCH corresponding to the PSSCH.

[0429] Optionally, the number of bits of the HARQ feedback of the user equipment is x bits, and optionally, x=1, or 2, or a positive integer greater than 2.

[0430] Optionally, the PSFCH occupies n consecutive PRBs in the frequency domain, and optionally, n=1, or 2, or a positive integer greater than 2.

[0431] The time slot where the last OFDM symbol of the PSSCH is located is recorded as slot PSSCH .

[0432] Optionally, the user equipment PSSCH , and / or the K, and / or the N, and / or at least one information in the resource pool configuration information other than the N and the K (optionally, the configuration information of the time domain resources for the communication on the resource pool side), determine the time slot s where the PSFCH corresponding to the PSSCH is located. Optionally, a specific implementation method is that the interval between the time slot s where the PSFCH corresponding to the PSSCH is located and the time slot where the PSSCH is located (using slot as a unit) is not less than the K, and satisfies that the time slot s is not less than the smallest positive integer in the K, and the time slot s contains a PSFCH resource with a configured period of the N.

[0433] Optionally, the user equipment determines N consecutive time slots corresponding to the slot s according to the slot s, and / or the N, and / or the K, and / or at least one information other than the N and the K in the resource pool configuration information (optionally, the configuration information of the time domain resources of the resource pool side communication). Optionally, the PSFCH corresponding to the PSSCH received in the N consecutive time slots is in the slot s in the time domain.

[0434] Optionally, the user equipment determines the slot PSSCH It is the i+1th time slot among the N consecutive time slots, where i=0, 1, ..., N-1.

[0435] Optionally, the user equipment determines the number of PSFChoccasions (opportunities) on the time slot slot s according to the resource pool configuration information, expressed as PSFChoccasion.

[0436] Optionally, in the time slot slot s, only one OFDM symbol in the time domain contains the PSFChoccasion, or, optionally, more than one OFDM symbol in the time domain (the number of OFDM symbols is represented by N sym ) contains the PSFCH occasion.

[0437] Optionally, the user equipment determines the number of the PSFCH resource on the time slot slot s, expressed as number 0 to number PSFChoccasion*12n-1. Optionally, if the PSFCH resource number k+1 and the PSFCH resource number k belong to the same PSFCH occasion, then the cyclic shift corresponding to the PSFCH resource number k+1 is equal to the cyclic shift corresponding to the PSFCH resource number k plus 1. Wherein, k is a non-negative integer.

[0438] Optionally, the user equipment determines an identifier within the group, which is represented by m. Optionally, the user equipment determines an identifier within the group according to the i, and / or the m, and / or the Index startSubchannel Determine the resources of PSFCH, or determine the resource number of PSFCH.

[0439] Optionally, the user equipment determines a variable Alternatively, the user equipment determines a variable Alternatively, the user equipment determines a variable Alternatively, the user equipment determines a variable

[0440] or,

[0441] Optionally, the variable Capacity UE It is included in the sideline communication configuration information, or in the pre-configuration information of the user equipment, or in a predefined value.

[0442] Optionally, if the number of bits of the HARQ feedback of the user equipment is 1 bit, then, optionally, the user equipment determines that the number of the PSFCH resource for feeding back the HARQ ACK is Index startSubchannel ×Capacity UE +m+i×N subchannel ×Capacity UE Optionally, the user equipment determines that the number of the PSFCH resource for feeding back HARQ NACK is Index startSubchannel ×Capacity UE +m+i×N subchannel ×Capacity UE +1, or, optionally, the user equipment determines that the number of the PSFCH resource for feeding back HARQ NACK is Index startSubchannel ×Capacity UE +m+i×N subchannel ×Capacity UE+12n / 2. Alternatively, the user equipment determines that the number of the PSFCH resource for feeding back HARQ NACK is Index startSubchannel ×Capacity UE +m+i×N subchannel ×Capacity UE Optionally, the user equipment determines the index of the PSFCH resource for feedback HARQ ACK startSubchannel ×Capacity UE +m+i×N subchannel ×Capacity UE +1, or, optionally, the user equipment determines the index of the PSFCH resource for feeding back HARQ ACK startSubchannel ×Capacity UE +m+i×N subchannel ×Capacity UE +12n / 2.

[0443] or,

[0444] Optionally, if the number of bits of the HARQ feedback of the user equipment is 2 bits, then, optionally, the user equipment determines that the number of the PSFCH resource of the feedback "00" is Index startSubchannel ×Capacity UE +m+i×N subchannel ×Capacity UE Optionally, the user equipment determines that the number of the PSFCH resource of feedback "01" is Index startSubchannel ×Capacity UE +m+i×N subchannel ×Capacity UE +1, or, optionally, the user equipment determines that the number of the PSFCH resource of feedback "01" is Index startSubchannel ×Capacity UE +m+i×N subchannel ×Capacity UE +12n / 4, optionally, the user equipment determines that the number of the PSFCH resource with feedback "11" is Index startSubchannel ×Capacity UE +m+i×N subchannel ×Capacity UE +2, or, optionally, the user equipment determines that the number of the PSFCH resource of feedback "11" is Index startSubchannel ×Capacity UE +m+i×Nsubchannel ×Capacity UE +2×12n / 4, optionally, the user equipment determines that the number of the PSFCH resource of feedback "10" is Index startSubchannel ×Capacity UE +m+i×N subchannel ×Capacity UE +3, or, optionally, the user equipment determines that the number of the PSFCH resource of feedback "10" is Index startSubchannel ×Capacity UE +m+i×N subchannel ×Capacity UE +3×12n / 4. The numbers of the PSFCH resources corresponding to “00”, “01”, “11” and “10” include but are not limited to the above implementation manners.

[0445] Optionally, if the user equipment's group identifier m>Capacity UE , then, optionally, the user equipment does not feed back HARQ information, or the user equipment assumes that HARQ feedback is disabled.

[0446] [Example 10]

[0447] like Figure 3 As shown, in the tenth embodiment of the present disclosure, the method executed by the user equipment may include:

[0448] In step S101, the sidelink communication user equipment determines configuration information of the sidelink communication.

[0449] Optionally, the sideline communication configuration information is configuration information sent by the base station via RRC signaling.

[0450] Optionally, the sideline communication configuration information is included in pre-configuration information of the user equipment.

[0451] Optionally, the side communication configuration information includes configuration information of a resource pool.

[0452] Optionally, the resource pool configuration information includes subchannel size information SubchannelSize. Optionally, the subchannel size information is in units of PRB.

[0453] Optionally, the resource pool configuration information includes information N of the number of sub-channels. subchannel .

[0454] Optionally, the resource pool configuration information includes a PSFCH period N. Optionally, the PSFCH period is in units of slots in the resource pool.

[0455] Optionally, the resource pool configuration information includes an interval K from the PSSCH to the corresponding PSFCH, and optionally, the unit of K is a time slot.

[0456] Optionally, the resource pool configuration information includes configuration information for receiving UE feedback HARQ ACK and HARQ NACK.

[0457] In step S102, the user equipment receives sideline communication control information SCI and corresponding PSSCH sent by other user equipments.

[0458] Optionally, the SCI sent by the other user equipment contains the SCI and the corresponding PSSCH indication information that they are multicast transmissions. The implementation methods of the indication information include but are not limited to the following:

[0459] Optionally, the SCI includes 2 bits of indication field indication information, or 1 bit of indication field indication information, indicating that the SCI and the corresponding PSSCH are multicast transmissions.

[0460] Optionally, the ID of the other user equipment contained in the SCI, and / or the ID of the user equipment, and / or the session (or link) ID of the transmission, indicate that the SCI and the corresponding PSSCH are multicast transmissions.

[0461] Optionally, the user equipment determines the index of the starting subchannel of the PSSCH according to the SCI. startSubchannel .

[0462] In step S103, the user equipment determines the resources of the PSFCH corresponding to the PSSCH.

[0463] Optionally, the number of bits of the HARQ feedback of the user equipment is x bits, and optionally, x=1, or 2, or a positive integer greater than 2.

[0464] Optionally, the PSFCH occupies n consecutive PRBs in the frequency domain, and optionally, n=1, or 2, or a positive integer greater than 2.

[0465] The time slot where the last OFDM symbol of the PSSCH is located is recorded as slot PSSCH .

[0466] Optionally, the user equipment PSSCH , and / or the K, and / or the N, and / or at least one information in the resource pool configuration information other than the N and the K (optionally, the configuration information of the time domain resources for the communication on the resource pool side), determine the time slot s where the PSFCH corresponding to the PSSCH is located. Optionally, a specific implementation method is that the interval between the time slot s where the PSFCH corresponding to the PSSCH is located and the time slot where the PSSCH is located (using slot as a unit) is not less than the K, and satisfies that the time slot s is not less than the smallest positive integer in the K, and the time slot s contains a PSFCH resource with a configured period of the N.

[0467] Optionally, the user equipment determines N consecutive time slots corresponding to the slot s according to the slot s, and / or the N, and / or the K, and / or at least one information other than the N and the K in the resource pool configuration information (optionally, the configuration information of the time domain resources of the resource pool side communication). Optionally, the PSFCH corresponding to the PSSCH received in the N consecutive time slots is in the slot s in the time domain.

[0468] Optionally, the user equipment determines the slot PSSCH It is the i+1th time slot among the N consecutive time slots, where i=0, 1, ..., N-1.

[0469] Optionally, the user equipment determines the number of PSFChoccasions (opportunities) on the time slot slot s according to the resource pool configuration information, expressed as PSFChoccasion.

[0470] Optionally, in the time slot slot s, only one OFDM symbol in the time domain contains the PSFChoccasion, or, optionally, more than one OFDM symbol in the time domain (the number of OFDM symbols is represented by N sym ) contains the PSFCH occasion.

[0471] Optionally, the user equipment determines the number of the PSFCH resource on the time slot slot s, expressed as number 0 to number PSFChoccasion*12n-1. Optionally, if the PSFCH resource number k+1 and the PSFCH resource number k belong to the same PSFCH occasion, then the cyclic shift corresponding to the PSFCH resource number k+1 is equal to the cyclic shift corresponding to the PSFCH resource number k plus 1. Wherein, k is a non-negative integer.

[0472] Optionally, the user equipment determines an intra-group identifier, which is represented by m.

[0473] Optionally, the user equipment determines the index according to the i, and / or the m, and / or the Index. startSubchannel Determine the resources of PSFCH, or determine the resource number of PSFCH.

[0474] Optionally, the user equipment determines a variable Alternatively, the user equipment determines a variable Alternatively, the user equipment determines a variable Alternatively, the user equipment determines a variable

[0475] or,

[0476] Optionally, the variable Capacity UE It is included in the sideline communication configuration information, or in the pre-configuration information of the user equipment, or in a predefined value.

[0477] Optionally, if the number of bits of the HARQ feedback of the user equipment is 1 bit, then, optionally, the user equipment determines that the number of the PSFCH resource for feeding back the HARQ ACK is Index startSubchannel ×Capacity UE +m+i×PSFCHoccasion×12n / N, Optionally, the user equipment determines that the number of the PSFCH resource for feedback HARQ NACK is Index startSubchannel ×Capacity UE +m+i×PSFChoccasion×12n / N+1, or, optionally, the user equipment determines that the number of the PSFCH resource for feeding back HARQ NACK is Index startSubchannel ×Capacity UE +m+i×PSFChoccasion×12n / N+12n / 2. Or, optionally, the user equipment determines that the number of the PSFCH resource for feeding back HARQ NACK is Index startSubchannel ×Capacity UE +m+i×PSFCHoccasion×12n / N, Optionally, the user equipment determines that the number of the PSFCH resource for feedback HARQ ACK is Index startSubchannel ×Capacity UE+m+i×PSFChoccasion×12n / N+1, or, optionally, the user equipment determines that the number of the PSFCH resource for feedback HARQ ACK is Index startSubchannel ×Capacity UE +m+i×PSFCHoccasion×12n / N+12n / 2.

[0478] or,

[0479] Optionally, if the number of bits of the HARQ feedback of the user equipment is 2 bits, then, optionally, the user equipment determines that the number of the PSFCH resource of the feedback "00" is Index startSubchannel ×Capacity UE +m+i×PSFCHoccasion×12n / N, optionally, the user equipment determines the number Index of the PSFCH resource of feedback "01" startSubchannel ×Capacity UE +m+i×PSFChoccasion×12n / N+1, or, optionally, the user equipment determines the number Index of the PSFCH resource of feedback "01" startSubchannel ×Capacity UE +m+i×PSFChoccasion×12n / N+12n / 4, optionally, the user equipment determines that the number of the PSFCH resource of feedback "11" is Index startSubchannel ×Capacity UE +m+i×PSFChoccasion×12n / N+2, or, optionally, the user equipment determines the number Index of the PSFCH resource of feedback "11" startSubchannel ×Capacity UE +m+i×PSFChoccasion×12n / N+2×12n / 4, optionally, the user equipment determines that the number of the PSFCH resource of feedback "10" is Index startSubchannel ×Capacity UE +m+i×PSFChoccasion×12n / N+3, or, optionally, the user equipment determines to feedback the index of the PSFCH resource "10" startSubchannel ×Capacity UE +m+i×PSFChoccasion×12n / N+3×12n / 4. The numbers of PSFCH resources corresponding to “00”, “01”, “11” and “10” include but are not limited to the above implementation manners.

[0480] Optionally, if the user equipment's group identifier m>Capacity UE , then, optionally, the user equipment does not feed back HARQ information, or the user equipment assumes that HARQ feedback is disabled.

[0481] [Example 11]

[0482] like Figure 3 As shown, in the eleventh embodiment of the present disclosure, the method performed by the user equipment may include:

[0483] In step S101, the sidelink communication user equipment determines configuration information of the sidelink communication.

[0484] Optionally, the sideline communication configuration information is configuration information sent by the base station via RRC signaling.

[0485] Optionally, the sideline communication configuration information is included in pre-configuration information of the user equipment.

[0486] Optionally, the side communication configuration information includes configuration information of a resource pool.

[0487] Optionally, the resource pool configuration information includes subchannel size information SubchannelSize. Optionally, the subchannel size information is in units of PRB.

[0488] Optionally, the resource pool configuration information includes information N of the number of sub-channels. subchannel .

[0489] Optionally, the resource pool configuration information includes a PSFCH period N. Optionally, the PSFCH period is in units of slots in the resource pool.

[0490] Optionally, the resource pool configuration information includes an interval K from the PSSCH to the corresponding PSFCH, and optionally, the unit of K is a time slot.

[0491] Optionally, the resource pool configuration information includes configuration information that the side communication in the resource pool is multicast.

[0492] Optionally, the resource pool configuration information includes configuration information for receiving UE feedback HARQ ACK and HARQ NACK.

[0493] In step S102, the user equipment receives sideline communication control information SCI and corresponding PSSCH sent by other user equipments.

[0494] Optionally, the user equipment determines the index of the starting subchannel of the PSSCH according to the SCI. startSubchannel .

[0495] In step S103, the user equipment determines the resources of the PSFCH corresponding to the PSSCH.

[0496] Optionally, the number of bits of the HARQ feedback of the user equipment is x bits, and optionally, x=1, or 2, or a positive integer greater than 2.

[0497] Optionally, the PSFCH occupies n consecutive PRBs in the frequency domain, and optionally, n=1, or 2, or a positive integer greater than 2.

[0498] The time slot where the last OFDM symbol of the PSSCH is located is recorded as slot PSSCH .

[0499] Optionally, the user equipment PSSCH , and / or the K, and / or the N, and / or at least one information in the resource pool configuration information other than the N and the K (optionally, the configuration information of the time domain resources for the communication on the resource pool side), determine the time slot s where the PSFCH corresponding to the PSSCH is located. Optionally, a specific implementation method is that the interval between the time slot s where the PSFCH corresponding to the PSSCH is located and the time slot where the PSSCH is located (using slot as a unit) is not less than the K, and satisfies that the time slot s is not less than the smallest positive integer in the K, and the time slot s contains a PSFCH resource with a configured period of the N.

[0500] Optionally, the user equipment determines N consecutive time slots corresponding to the slot s according to the slot s, and / or the N, and / or the K, and / or at least one information other than the N and the K in the resource pool configuration information (optionally, the configuration information of the time domain resources of the resource pool side communication). Optionally, the PSFCH corresponding to the PSSCH received in the N consecutive time slots is in the slot s in the time domain.

[0501] Optionally, the user equipment determines the slot PSSCH It is the i+1th time slot among the N consecutive time slots, where i=0, 1, ..., N-1.

[0502] Optionally, the user equipment determines the number of PSFChoccasions (opportunities) on the time slot slot s according to the resource pool configuration information, expressed as PSFChoccasion.

[0503] Optionally, in the time slot slot s, only one OFDM symbol in the time domain contains the PSFChoccasion, or, optionally, more than one OFDM symbol in the time domain (the number of OFDM symbols is represented by N sym ) contains the PSFCH occasion.

[0504] Optionally, the user equipment determines the number of the PSFCH resource on the time slot slot s, expressed as number 0 to number PSFChoccasion*12n-1. Optionally, if the PSFCH resource number k+1 and the PSFCH resource number k belong to the same PSFCH occasion, then the cyclic shift corresponding to the PSFCH resource number k+1 is equal to the cyclic shift corresponding to the PSFCH resource number k plus 1. Wherein, k is a non-negative integer.

[0505] Optionally, the user equipment determines an intra-group identifier, which is represented by m.

[0506] Optionally, the user equipment determines the index according to the i, and / or the m, and / or the Index. startSubchannel Determine the resources of PSFCH, or determine the resource number of PSFCH.

[0507] Optionally, the user equipment determines a variable Alternatively, the user equipment determines a variable Alternatively, the user equipment determines a variable Alternatively, the user equipment determines a variable

[0508] or,

[0509] Optionally, the variable Capacity UE It is included in the sideline communication configuration information, or in the pre-configuration information of the user equipment, or in a predefined value.

[0510] Optionally, if the number of bits of the HARQ feedback of the user equipment is 1 bit, then, optionally, the user equipment determines that the number of the PSFCH resource for feeding back the HARQ ACK is Index startSubchannel ×Capacity UE +m+i×N subchannel ×CapacityUE Optionally, the user equipment determines that the number of the PSFCH resource for feeding back HARQ NACK is Index startSubchannel ×Capacity UE +m+i×N subchannel ×Capacity UE +1, or, optionally, the user equipment determines that the number of the PSFCH resource for feeding back HARQ NACK is Index startSubchannel ×Capacity UE +m+i×N subchannel ×Capacity UE +12n / 2. Alternatively, the user equipment determines that the number of the PSFCH resource for feeding back HARQ NACK is Index startSubchannel ×Capacity UE +m+i×N subchannel ×Capacity UE Optionally, the user equipment determines the index of the PSFCH resource for feedback HARQ ACK startSubchannel ×Capacity UE +m+i×N subchannel ×Capacity UE +1, or, optionally, the user equipment determines the index of the PSFCH resource for feeding back HARQ ACK startSubchannel ×Capacity UE +m+i×N subchannel ×Capacity UE +12n / 2.

[0511] or,

[0512] Optionally, if the number of bits of the HARQ feedback of the user equipment is 2 bits, then, optionally, the user equipment determines that the number of the PSFCH resource of the feedback "00" is Index startSubchannel ×Capacity UE +m+i×N SVbchannel ×Capacity UE Optionally, the user equipment determines that the number of the PSFCH resource of feedback "01" is Index startSubchannel ×Capacity UE +m+i×N subchannel ×Capacity UE +1, or, optionally, the user equipment determines that the number of the PSFCH resource of feedback "01" is Index startSubchannel ×Capacity UE+m+i×N subchannel ×Capacity UE +12n / 4, optionally, the user equipment determines that the number of the PSFCH resource with feedback "11" is Index startSubchannel ×Capacity UE +m+i×N subchannel ×Capacity UE +2, or, optionally, the user equipment determines that the number of the PSFCH resource of feedback "11" is Index startSubchannel ×Capacity UE +m+i×N subchannel ×Capacity UE +2×12n / 4, optionally, the user equipment determines that the number of the PSFCH resource of feedback "10" is Index startSubchannel ×Capacity UE +m+i×N subchannel ×Capacity UE +3, or, optionally, the user equipment determines that the number of the PSFCH resource of feedback "10" is Index startSubchannel ×Capacity UE +m+i×N subchannel ×Capacity UE +3×12n / 4. The numbers of the PSFCH resources corresponding to “00”, “01”, “11” and “10” include but are not limited to the above implementation manners.

[0513] Optionally, if the user equipment's group identifier m>Capacity UE , then, optionally, the user equipment does not feed back HARQ information, or the user equipment assumes that HARQ feedback is disabled.

[0514] [Example 12]

[0515] like Figure 3 As shown, in the twelfth embodiment of the present disclosure, the method executed by the user equipment may include:

[0516] In step S101, the sidelink communication user equipment determines configuration information of the sidelink communication.

[0517] Optionally, the sideline communication configuration information is configuration information sent by the base station via RRC signaling.

[0518] Optionally, the sideline communication configuration information is included in pre-configuration information of the user equipment.

[0519] Optionally, the side communication configuration information includes configuration information of a resource pool.

[0520] Optionally, the resource pool configuration information includes subchannel size information SubchannelSize. Optionally, the subchannel size information is in units of PRB.

[0521] Optionally, the resource pool configuration information includes information N of the number of sub-channels. subchannnel .

[0522] Optionally, the resource pool configuration information includes a PSFCH period N. Optionally, the PSFCH period is in units of slots in the resource pool.

[0523] Optionally, the resource pool configuration information includes an interval K from the PSSCH to the corresponding PSFCH, and optionally, the unit of K is a time slot.

[0524] Optionally, the resource pool configuration information includes configuration information that the side communication in the resource pool is multicast.

[0525] Optionally, the resource pool configuration information includes configuration information for receiving UE feedback HARQ ACK and HARQ NACK.

[0526] In step S102, the user equipment receives sideline communication control information SCI and corresponding PSSCH sent by other user equipments.

[0527] Optionally, the user equipment determines the index of the starting subchannel of the PSSCH according to the SCI. startSubchannel .

[0528] In step S103, the user equipment determines the resources of the PSFCH corresponding to the PSSCH.

[0529] Optionally, the number of bits of the HARQ feedback of the user equipment is x bits, and optionally, x=1, or 2, or a positive integer greater than 2.

[0530] Optionally, the PSFCH occupies n consecutive PRBs in the frequency domain, and optionally, n=1, or 2, or a positive integer greater than 2.

[0531] The time slot where the last OFDM symbol of the PSSCH is located is recorded as slot PSSCH .

[0532] Optionally, the user equipment PSSCH, and / or the K, and / or the N, and / or at least one information in the resource pool configuration information other than the N and the K (optionally, the configuration information of the time domain resources for the communication on the resource pool side), determine the time slot s where the PSFCH corresponding to the PSSCH is located. Optionally, a specific implementation method is that the interval between the time slot s where the PSFCH corresponding to the PSSCH is located and the time slot where the PSSCH is located (using slot as a unit) is not less than the K, and satisfies that the time slot s is not less than the smallest positive integer in the K, and the time slot s contains a PSFCH resource with a configured period of the N.

[0533] Optionally, the user equipment determines N consecutive time slots corresponding to the slot s according to the slot s, and / or the N, and / or the K, and / or at least one information other than the N and the K in the resource pool configuration information (optionally, the configuration information of the time domain resources of the resource pool side communication). Optionally, the PSFCH corresponding to the PSSCH received in the N consecutive time slots is in the slot s in the time domain.

[0534] Optionally, the user equipment determines the slot PSSCH It is the i+1th time slot among the N consecutive time slots, where i=0, 1, ..., N-1.

[0535] Optionally, the user equipment determines the number of PSFChoccasions (opportunities) on the time slot slot s according to the resource pool configuration information, expressed as PSFChoccasion.

[0536] Optionally, in the time slot slot s, only one OFDM symbol in the time domain contains the PSFChoccasion, or, optionally, more than one OFDM symbol in the time domain (the number of OFDM symbols is represented by N sym ) contains the PSFCH occasion.

[0537] Optionally, the user equipment determines the number of the PSFCH resource on the time slot slot s, expressed as number 0 to number PSFChoccasion*12n-1. Optionally, if the PSFCH resource number k+1 and the PSFCH resource number k belong to the same PSFCH occasion, then the cyclic shift corresponding to the PSFCH resource number k+1 is equal to the cyclic shift corresponding to the PSFCH resource number k plus 1. Wherein, k is a non-negative integer.

[0538] Optionally, the user equipment determines an intra-group identifier, which is represented by m.

[0539] Optionally, the user equipment determines the index according to the i, and / or the m, and / or the Index. startSubchannel Determine the resources of PSFCH, or determine the resource number of PSFCH.

[0540] Optionally, the user equipment determines a variable Alternatively, the user equipment determines a variable Alternatively, the user equipment determines a variable Alternatively, the user equipment determines a variable

[0541] or,

[0542] Optionally, the variable Capacity UE It is included in the sideline communication configuration information, or in the pre-configuration information of the user equipment, or in a predefined value.

[0543] Optionally, if the number of bits of the HARQ feedback of the user equipment is 1 bit, then, optionally, the user equipment determines that the number of the PSFCH resource for feeding back the HARQ ACK is Index startSubchannel ×Capacity UE +m+i×PSFCHoccasion×12n / N, Optionally, the user equipment determines that the number of the PSFCH resource for feedback HARQ NACK is Index startSubchannel ×Capacity UE +m+i×PSFChoccasion×12n / N+1, or, optionally, the user equipment determines that the number of the PSFCH resource for feeding back HARQ NACK is Index startSubchannel ×Capacity UE +m+i×PSFChoccasion×12n / N+12n / 2. Or, optionally, the user equipment determines that the number of the PSFCH resource for feeding back HARQ NACK is Index startSubchannel ×Capacity UE +m+i×PSFCHoccasion×12n / N, Optionally, the user equipment determines that the number of the PSFCH resource for feedback HARQ ACK is Index startSubchannel ×Capacity UE+m+i×PSFChoccasion×12n / N+1, or, optionally, the user equipment determines that the number of the PSFCH resource for feedback HARQ ACK is Index startSubchannel ×Capacity UE +m+i×PSFCHoccasion×12n / N+12n / 2.

[0544] or,

[0545] Optionally, if the number of bits of the HARQ feedback of the user equipment is 2 bits, then, optionally, the user equipment determines that the number of the PSFCH resource of the feedback "00" is Index startSubchannel ×Capacity UE +m+i×PSFCHoccasion×12n / N, optionally, the user equipment determines the number Index of the PSFCH resource of feedback "01" startSubchannel ×Capacity UE +m+i×PSFChoccasion×12n / N+1, or, optionally, the user equipment determines the number Index of the PSFCH resource of feedback "01" startSubchannel ×Capacity UE +m+i×PSFChoccasion×12n / N+12n / 4, optionally, the user equipment determines that the number of the PSFCH resource of feedback "11" is Index startSubchannel ×Capacity UE +m+i×PSFChoccasion×12n / N+2, or, optionally, the user equipment determines the number Index of the PSFCH resource of feedback "11" startSubchannel ×Capacity UE +m+i×PSFChoccasion×12n / N+2×12n / 4, optionally, the user equipment determines that the number of the PSFCH resource of feedback "10" is Index startSubchannel ×Capacity UE +m+i×PSFChoccasion×12n / N+3, or, optionally, the user equipment determines to feedback the index of the PSFCH resource "10" startSubchannel ×Capacity UE +m+i×PSFChoccasion×12n / N+3×12n / 4. The numbers of PSFCH resources corresponding to “00”, “01”, “11” and “10” include but are not limited to the above implementation manners.

[0546] Optionally, if the user equipment's group identifier m>Capacity UE , then, optionally, the user equipment does not feed back HARQ information, or the user equipment assumes that HARQ feedback is disabled.

[0547] Figure 4 1 is a basic flow chart showing a method executed by a user equipment in each of Embodiment 13 and Embodiment 14 of the present disclosure.

[0548] Next, combine Figure 4 The basic flow chart shown is used to explain in detail the method executed by the user equipment in the thirteenth and fourteenth embodiments of the present disclosure.

[0549] [Example 13]

[0550] like Figure 4 As shown, in the thirteenth embodiment of the present invention, the method performed by the user equipment includes:

[0551] In step S201, the sidewalk communication user equipment determines configuration information of a sidewalk communication resource pool.

[0552] Optionally, the sideline communication resource pool configuration information is configuration information sent by the base station through RRC signaling.

[0553] or,

[0554] Optionally, the sideline communication resource pool configuration information is included in pre-configuration information of the user equipment.

[0555] Optionally, the sideline communication resource pool configuration information includes PSFCH configuration information.

[0556] Optionally, the PSFCH configuration information indicates the starting OFDM symbol s of the PSFCH resource. start , or, the number of OFDM symbols n of the PSFCH resource ofdm .

[0557] In step S202, the user equipment determines the time domain resources of the PSFCH in the resource pool.

[0558] Optionally, if the PSFCH configuration information indicates the starting OFDM symbol s of the PSFCH resource start , the UE determines the time domain resource of the PSFCH from OFDM symbol s start to OFDM symbol Alternatively, the UE determines the time domain resource of the PSFCH from OFDM symbol s start to OFDM symbol

[0559] or,

[0560] Optionally, if the PSFCH configuration information indicates the number of OFDM symbols n of the PSFCH resource ofdm , the UE determines the time domain resource of the PSFCH from OFDM symbol to OFDM symbol Alternatively, the UE determines the time domain resource of the PSFCH from the OFDM symbol to OFDM symbol

[0561] [Example 14]

[0562] like Figure 4 As shown, in Embodiment 14 of the present invention, the method performed by the user equipment includes:

[0563] In step S201, the sidewalk communication user equipment determines configuration information of a sidewalk communication resource pool.

[0564] Optionally, the sideline communication resource pool configuration information is configuration information sent by the base station through RRC signaling.

[0565] or,

[0566] Optionally, the sideline communication resource pool configuration information is included in pre-configuration information of the user equipment.

[0567] Optionally, the sideline communication resource pool configuration information includes PSFCH configuration information.

[0568] Optionally, the PSFCH configuration information includes configuration information of at least one PSFCH format.

[0569] Optionally, the at least one PSFCH format includes a first PSFCH format, and the first PSFCH format occupies 1 OFDM symbol in the time domain.

[0570] Optionally, the at least one PSFCH format includes a second PSFCH format, and the second PSFCH format occupies p OFDM symbols in the time domain, where p is a positive integer greater than or equal to 1.

[0571] Optionally, the configuration information of the first PSFCH format indicates the starting OFDM symbol s of the first PSFCH format resource. start1 , or, the number of OFDM symbols n of the PSFCH resource ofaml .

[0572] Optionally, the configuration information of the second PSFCH format indicates the starting OFDM symbol s of the second PSFCH format resource. start2 , or, the number of OFDM symbols n of the PSFCH resource ofdm2 .

[0573] In step S202, the user equipment determines the time domain resources of the PSFCH in the resource pool.

[0574] Optionally, if the PSFCH configuration information indicates the starting OFDM symbol s of the first PSFCH format resource start1 , the starting OFDM symbol s of the second PSFCH format resource start2 , the UE determines the time domain resource of the first PSFCH format from OFDM symbol S start1 to OFDM symbols start2 -1, the UE determines the time domain resource of the second PSFCH format from OFDM symbol s start2 to OFDM symbol Alternatively, the UE determines that the time domain resource of the first PSFCH format is from OFDM symbol s start1 to OFDM symbols start2 -1, the UE determines the time domain resource of the second PSFCH format from OFDM symbol s start2 to OFDM symbol Alternatively, the UE determines the time domain resource of the second PSFCH format from OFDM symbol s start2 to OFDM symbols start1 -1, the UE determines the time domain resource of the first PSFCH format from OFDM symbol s start1 to OFDM symbol Alternatively, the UE determines the time domain resource of the second PSFCH format from OFDM symbol s start2 to OFDM symbols start1 -1, the UE determines the time domain resource of the first PSFCH format from OFDM symbol s start1 to OFDM symbol

[0575] or,

[0576] Optionally, if the PSFCH configuration information indicates the number of OFDM symbols n of the first PSFCH format resource ofdm1 , the number of OFDM symbols n of the second PSFCH format resource ofdm2 , the UE determines the time domain resource of the first PSFCH from OFDM symbol to OFDM symbol The UE determines the time domain resource of the second PSFCH from OFDM symbol to OFDM symbol Alternatively, the UE determines the time domain resource of the first PSFCH from the OFDM symbol to OFDM symbol The UE determines the time domain resource of the second PSFCH from OFDM symbol to OFDM symbol Alternatively, the UE determines the time domain resource of the second PSFCH from the OFDM symbol to OFDM symbol The UE determines the time domain resource of the first PSFCH from OFDM symbol to OFDM symbol Alternatively, the UE determines the time domain resource of the second PSFCH from the OFDM symbol to OFDM symbol The UE determines the time domain resource of the first PSFCH from OFDM symbol to OFDM symbol

[0577] Figure 5 is a block diagram showing a user equipment UE involved in the present disclosure. Figure 5 As shown, the user equipment UE80 includes a processor 801 and a memory 802. The processor 801 may include, for example, a microprocessor, a microcontroller, an embedded processor, etc. The memory 802 may include, for example, a volatile memory (such as a random access memory RAM), a hard disk drive (HDD), a non-volatile memory (such as a flash memory), or other memories, etc. The memory 802 stores program instructions. When the instructions are executed by the processor 801, the above method performed by the user equipment described in detail in the present disclosure may be executed.

[0578] The method of the present invention and the equipment involved have been described above in conjunction with the preferred embodiments. Those skilled in the art will appreciate that the method shown above is merely exemplary, and the embodiments described above can be combined with each other without contradiction. The method of the present invention is not limited to the steps and sequence shown above. The network node and user equipment shown above may include more modules, for example, modules that can be developed or developed in the future and can be used for base stations, MMEs, or UEs, etc. The various identifiers shown above are merely exemplary and not restrictive, and the present invention is not limited to specific information elements that serve as examples of these identifiers. Those skilled in the art may make many changes and modifications based on the teachings of the illustrated embodiments.

[0579] It should be understood that the above embodiments of the present disclosure can be implemented by software, hardware, or a combination of software and hardware. For example, the various components inside the base station and user equipment in the above embodiments can be implemented by a variety of devices, including but not limited to: analog circuit devices, digital circuit devices, digital signal processing (DSP) circuits, programmable processors, application specific integrated circuits (ASICs), field programmable gate arrays (FPGAs), programmable logic devices (CPLDs), and the like.

[0580] In this application, "base station" may refer to a mobile communication data and control exchange center with a large transmission power and a wide coverage area, including functions such as resource allocation scheduling, data reception and transmission, etc. "User equipment" may refer to a user mobile terminal, such as a mobile phone, a notebook, etc., which can communicate wirelessly with a base station or a micro base station.

[0581] In addition, the embodiments of the present disclosure disclosed herein can be implemented on a computer program product. More specifically, the computer program product is a product as follows: having a computer-readable medium, a computer program logic is encoded on the computer-readable medium, and when executed on a computing device, the computer program logic provides relevant operations to implement the above-mentioned technical solutions of the present disclosure. When executed on at least one processor of a computing system, the computer program logic causes the processor to perform the operations (methods) described in the embodiments of the present disclosure. This arrangement of the present disclosure is typically provided as software, code and / or other data structures arranged or encoded on a computer-readable medium such as an optical medium (e.g., CD-ROM), a floppy disk or a hard disk, or other media such as firmware or microcode on one or more ROM or RAM or PROM chips, or downloadable software images in one or more modules, shared databases, etc. Software or firmware or such a configuration can be installed on a computing device so that one or more processors in the computing device execute the technical solutions described in the embodiments of the present disclosure.

[0582] In addition, each functional module or each feature of the base station equipment and terminal equipment used in each embodiment above can be implemented or executed by a circuit, and the circuit is generally one or more integrated circuits. The circuit designed to perform the various functions described in this specification may include a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC) or a general-purpose integrated circuit, a field programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic, or a discrete hardware component, or any combination of the above devices. The general-purpose processor may be a microprocessor, or the processor may be an existing processor, a controller, a microcontroller or a state machine. The above-mentioned general-purpose processor or each circuit may be configured by a digital circuit, or may be configured by a logic circuit. In addition, when, due to the progress of semiconductor technology, an advanced technology that can replace the current integrated circuit appears, the present disclosure may also use the integrated circuit obtained by using the advanced technology.

[0583] Although the present disclosure has been illustrated above in conjunction with the preferred embodiments of the present disclosure, it will be understood by those skilled in the art that various modifications, substitutions and changes may be made to the present disclosure without departing from the spirit and scope of the present disclosure. Therefore, the present disclosure should not be limited by the above embodiments, but by the attached claims and their equivalents.

Claims

1. A method performed by a user equipment, comprising: Receiving a sideline communication radio resource control RRC configuration sent from a new radio base station gNB, wherein the sideline communication RRC configuration includes a resource pool configuration, wherein the resource pool configuration includes a configuration of a physical sideline communication feedback channel PSFCH period N; Receiving sideline communication control information SCI and a physical sideline communication shared channel PSSCH scheduled in a time slot by the SCI; as well as Determine the frequency domain physical resource block PRB of the PSFCH corresponding to the PSSCH based at least on i, wherein the time slot where the last OFDM symbol of the PSSCH is located is the (i+1)th time slot among N consecutive time slots associated with the PSFCH time slot used for the PSFCH, wherein i=0, 1,…, N-1.

2. A user equipment, comprising: The receiving circuit is configured as follows: Receiving a sideline communication radio resource control RRC configuration sent from a new radio base station gNB, wherein the sideline communication RRC configuration includes a resource pool configuration, wherein the resource pool configuration includes a configuration of a physical sideline communication feedback channel PSFCH period N; and Receiving sideline communication control information SCI and a physical sideline communication shared channel PSSCH scheduled in a time slot by the SCI; as well as A determination circuit is configured to determine a frequency domain physical resource block PRB of a PSFCH corresponding to the PSSCH based at least on i, wherein the time slot where the last OFDM symbol of the PSSCH is located is the (i+1)th time slot among N consecutive time slots associated with the PSFCH time slot for the PSFCH, wherein i=0, 1,…, N-1.

3. A base station device, comprising: The transmission circuit is configured as: Sending a sideline communication radio resource control RRC configuration to a user equipment, wherein the sideline communication RRC configuration includes a resource pool configuration, wherein the resource pool configuration includes a configuration of a physical sideline communication feedback channel PSFCH period N, The sideline communication RRC configuration is sent to enable the user equipment to: receiving sideline communication control information SCI and a physical sideline communication shared channel PSSCH scheduled in a time slot by the SCI, and Determine the frequency domain physical resource block PRB of the PSFCH corresponding to the PSSCH based at least on i, wherein the time slot where the last OFDM symbol of the PSSCH is located is the (i+1)th time slot among N consecutive time slots associated with the PSFCH time slot used for the PSFCH, wherein i=0, 1,…, N-1.

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