Method performed by user equipment and user equipment

Abstract

The present invention provides a method performed by a user equipment and the user equipment. The method includes: determining configuration information of a resource pool for sidelink communication as first configuration information (S101); receiving sidelink communication control information SCI and a corresponding or associated physical sidelink shared channel PSSCH sent by another user equipment (S102); determining a value of a parameter m cs (S103), where the parameter m cs is a parameter for determining a cyclic shift.

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), the physical sideline communication feedback channel PSFCH was introduced to carry HARQ feedback information in sideline communication, such as HARQ ACK, or HARQ NACK, or collectively referred to as HARQ-ACK.

[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] In the conclusion of the 3GPP RAN1#97 meeting in May 2019 (see non-patent document 10), the following conclusions were drawn about the format of PSFCH:

[0030] 1) In the NR sidelink, a PSFCH format of one OFDM symbol (excluding AGC symbols) is supported. This PSFCH format is based on sequence design and takes PUCCH format 0 (sequence-based PUCCH format) in Rel-15NR as the baseline.

[0031] 2) The PSFCH format is applicable to both unicast and groupcast feedback mechanisms.

[0032] In the email discussion of the 3GPP RAN1#98bis meeting in October 2019 (see non-patent document 11), the following conclusions were drawn about PSFCH:

[0033] The single-symbol PSFCH format occupies one PRB in the frequency domain.

[0034] In the conclusions of the 3GPP RAN1#99 meeting in November 2019 (see Non-Patent Document 12), the following conclusions were drawn regarding PSFCH:

[0035] One PSFCH transmission contains at most 1 bit of sideline communication HARQ feedback information.

[0036] The solution of this patent includes a method for a sideline communication UE to determine the value of a cyclic shift of a sequence during PSFCH transmission.

[0037] Prior art literature

[0038] Non-patent literature

[0039] Non-patent literature 1: RP-140518, Work item proposal on LTE Device to DeviceProximity Services

[0040] Non-Patent Literature 2: RP-142311, Work Item Proposal for Enhanced LTE Device to Device Proximity Services

[0041] Non-patent document 3: RP-152293, New WI proposal: Support for V2V services based on LTE sidelink

[0042] Non-patent document 4: RP-170798, New WID on 3GPP V2X Phase 2

[0043] Non-Patent Literature 5: RP-181480, New SID Proposal: Study on NR V2X

[0044] Non-patent document 6: RAN1#94bis, Chairman notes, section 7.2.4.2

[0045] Non-patent document 7: RAN1#95, Chairman notes, section 7.2.4.2

[0046] Non-patent document 8: RAN1 AH#1901, Chairman notes, section 7.2.4.1.4, section 7.2.4.3

[0047] Non-patent document 9: RAN1#96bis, Chairman notes, section 7.2.4.5

[0048] Non-patent document 10: RAN1#97, Chairman notes, section 7.2.4.5

[0049] Non-patent document 11: RAN1#98bis, Minutes Report, [98b-NR-09]

[0050] Non-patent document 12: RAN1#99, Chairman notes, section 7.2.4.5 Summary of the invention

[0051] 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.

[0052] According to one aspect of the present disclosure, a method performed by a user equipment is provided, comprising: determining configuration information of a resource pool for sideline communication as first configuration information; receiving sideline communication control information SCI and corresponding or associated physical sideline communication shared channel PSSCH sent by other user equipment; determining parameter m cs The value of the parameter m cs is a parameter used to determine the cyclic shift.

[0053] According to a method in 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 pre-configuration information of the user equipment.

[0054] According to a method in one aspect of the present disclosure, the first configuration information includes configuration information rbSetPSFCH of a physical resource block PRB set actually used for transmission and reception of a physical sideline communication feedback channel PSFCH, i.e., second configuration information, wherein the rbSetPSFCH is a bitmap indication, is equal to the number of 1s or 0s in the rbSetPSFCH; or / and the configuration information N containing the number of subchannels in the first configuration information subch That is, the third configuration information; or / and the first configuration information includes the configuration information of the physical side communication feedback channel PSFCH resource period That is, the fourth configuration information; or / and the configuration information containing the number of cyclic shift pairs in the first configuration information or / and the configuration information m0 of the initial cyclic shift contained in the first configuration information, i.e., the sixth configuration information, wherein the value range of the m0 is 0 to 11, or, in units of the cyclic shift pair, the value range is 0 to 11.

[0055] According to a method of one aspect of the present disclosure, the SCI includes a first-level SCI and / or a second-level SCI; or / and a high-level or upper-level indicating the user equipment group internal identifier M ID , the m is determined according to the number or index i of the cyclic shift pair cs or determine the m according to the number of the cyclic shift pair or the cyclic shift i′ corresponding to the index i cs The numerical value of .

[0056] According to a method of one aspect of the present disclosure, the first level SCI and / or the second level SCI includes the number of sub-channels occupied by the corresponding physical sideline communication shared channel PSSCH transmission or / and the first level SCI and / or the second level SCI includes the source identifier P of the other user equipmentID , or in, or

[0057] According to a method in one aspect of the present disclosure, the first configuration information includes indication information, wherein the indication information indicates or configures a mapping relationship between a physical sideline communication shared channel PSSCH and a physical sideline communication feedback channel PSFCH for: or Equal to the number of subchannels occupied by the physical sideline communication shared channel PSSCH transmission

[0058] According to a method of one aspect of the present disclosure, the first level SCI and / or the second level SCI includes indication information, wherein the indication information indicates a mapping relationship between a physical sideline communication shared channel PSSCH and a physical sideline communication feedback channel PSFCH. for: or Equal to the number of subchannels occupied by the physical sideline communication shared channel PSSCH transmission

[0059] According to a method of one aspect of the present disclosure, if the user equipment feeds back a NACK, the m cs The value of m is equal to the number or index i of the cyclic shift pair; if the user equipment feeds back ACK, the m cs The value of is equal to the value obtained by the number or index i+6 of the cyclic shift pair.

[0060] According to a method of one aspect of the present disclosure, if the user equipment feeds back a NACK, the m cs The value of m is equal to the value of the cyclic shift i′ corresponding to the number or index i of the cyclic shift pair; if the user equipment feeds back an ACK, the m cs The value is equal to the value obtained by the cyclic shift i′+6 corresponding to the number or index i of the cyclic shift pair, or the value obtained by (i′+6) mod 12, wherein the correspondence between the i and the i′ is predefined, fixed, or preconfigured.

[0061] 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.

[0062] Effects of the Invention

[0063] According to the present disclosure, a method and a user equipment executed by a user equipment can be provided, which can be effectively applied to the application scenario of V2X based on 5G NR network technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0064] 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:

[0065] Figure 1 It is a diagram schematically showing the basic process of Rel-14 / 15LTE V2X side communication.

[0066] Figure 2 It schematically shows two resource allocation methods of Rel-14 / 15LTE V2X.

[0067] Figure 3 It is a basic flow chart schematically showing the method executed by the user equipment in Embodiments 1 to 4 of the present disclosure.

[0068] Figure 4 is a block diagram schematically showing a user equipment involved in the present disclosure. DETAILED DESCRIPTION

[0069] 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.

[0070] 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.

[0071] 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.

[0072] 3GPP: 3rd Generation Partnership Project

[0073] LTE: Long Term Evolution

[0074] NR: New Radio

[0075] PDCCH: Physical Downlink Control Channel, physical downlink control channel

[0076] DCI: Downlink Control Information, downlink control information

[0077] PDSCH: Physical Downlink Shared Channel, physical downlink shared channel

[0078] UE:User Equipment

[0079] eNB: evolved NodeB

[0080] gNB: NR base station

[0081] TTI: Transmission Time Interval, transmission time interval

[0082] OFDM: Orthogonal Frequency Division Multiplexing

[0083] C-RNTI: Cell Radio Network Temporary Identifier, cell radio network temporary identifier

[0084] CSI: Channel State Indicator, channel state indicator

[0085] HARQ: Hybrid Automatic Repeat Request

[0086] CSI-RS: CSI-Reference Signal, channel state measurement reference signal

[0087] CRS: Cell Reference Signal, cell-specific reference signal

[0088] PUCCH: Physical Uplink Control Channel, physical uplink control channel

[0089] PUSCH: Physical Uplink Shared Channel, physical uplink shared channel

[0090] UL-SCH: Uplink Shared Channel, uplink shared channel

[0091] CG: Configured Grant, configuration scheduling permission

[0092] Sidelink: Sidelink communication

[0093] SCI: Sidelink Control Information, sidelink communication control information

[0094] PSCCH: Physical Sidelink Control Channel, physical sidelink communication control channel

[0095] MCS: Modulation and Coding Scheme, modulation and coding scheme

[0096] CRB: Common Resource Block

[0097] CP: Cyclic Prefix

[0098] PRB: Physical Resource Block, physical resource block

[0099] PSSCH: Physical Sidelink Shared Channel, physical sidelink communication shared channel

[0100] FDM: Frequency Division Multiplexing

[0101] RRC: Radio Resource Control

[0102] RSRP: Reference Signal Receiving Power, reference signal receiving power

[0103] SRS: Sounding Reference Signal, detection reference signal

[0104] DMRS: Demodulation Reference Signal

[0105] CRC: Cyclic Redundancy Check

[0106] PSDCH: Physical Sidelink Discovery Channel, physical sidelink communication discovery channel

[0107] PSBCH: Physical Sidelink Broadcast Channel, physical sidelink communication broadcast channel

[0108] SFI: Slot Format Indication, slot format indication

[0109] TDD: Time Division Duplexing

[0110] FDD: Frequency Division Duplexing

[0111] SIB1: System Information Block Type 1, system information block type 1

[0112] SLSS: Sidelink synchronization Signal, sidelink communication synchronization signal

[0113] PSSS: Primary Sidelink Synchronization Signal, primary synchronization signal for sidelink communication

[0114] SSSS: Secondary Sidelink Synchronization Signal, sideline communication auxiliary synchronization signal

[0115] PCI: Physical Cell ID, physical cell identifier

[0116] PSS: Primary Synchronization Signal

[0117] SSS: Secondary Synchronization Signal, auxiliary synchronization signal

[0118] BWP: BandWidth Part, bandwidth fragment / part

[0119] GNSS: Global Navigation Satellite System

[0120] SFN: System Frame Number, system (wireless) frame number

[0121] DFN: Direct Frame Number, direct frame number

[0122] IE: Information Element

[0123] SSB: Synchronization Signal Block, synchronization system information block

[0124] EN-DC: EUTRA-NR Dual Connection, LTE-NR dual connection

[0125] MCG: Master Cell Group

[0126] SCG: Secondary Cell Group

[0127] PCell: Primary Cell

[0128] SCell: Secondary Cell

[0129] PSFCH: Physical Sidelink Feedback Channel, physical sidelink communication feedback channel

[0130] AGC: Automatic Gain Control, automatic gain control

[0131] 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.

[0132] 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.

[0133] 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.

[0134] 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.

[0135] In the specification of this disclosure Indicates that a is rounded down, for example In the specification of the present disclosure, a mod b represents the remainder obtained after a is divided by b, for example, 7 mod 4=3.

[0136] In the specification of the present disclosure, the PSSCH corresponding to or associated with SCI also refers to the PSSCH scheduled by SCI.

[0137] Sidelink communication scenarios

[0138] 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).

[0139] 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).

[0140] 3) Partial-Coverage sidelink communication: One of the UEs performing sidelink communication has no network coverage, while the other UE has network coverage.

[0141] 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.

[0142] NR V2X unicast, groupcast and broadcast

[0143] 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.

[0144] HARO and sidelink HARO

[0145] 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.

[0146] 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).

[0147] Sidelink multicast HARQ

[0148] For groupcast sideline communications, when HARQ feedback is enabled, two HARQ feedback mechanisms are supported:

[0149] 1) (referred to as mechanism 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;

[0150] a) All receiving UEs in the group share one PSFCH resource for feeding back HARQ NACK.

[0151] 2) (referred to as mechanism 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.

[0152] a) Each UE in the group uses a separate PSFCH resource to feed back HARQ ACK and HARQ NACK.

[0153] A PSFCH resource represents a PSFCH resource mapped in a specific time domain, frequency domain, and code domain.

[0154] PSFCH resource configuration

[0155] 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.

[0156] Sequence-based PSFCH

[0157] Here use Indicates the number of PRBs occupied by PSFCH in the frequency domain (in Rel-16NR sideline communication, ), the length of the sequence constituting PSFCH can be expressed as in This sequence can be expressed as rα(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 (In Rel-16NR sideline communication, the number of PSFCH resources is equal to 12, that is, 12 different sequences) different PSFCH resources.

[0158] 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, the user equipment UE needs to occupy 2 different PSFCH resources to send HARQ ACK and HARQ NACK respectively. At most 12 / 2=6 different user equipments can be multiplexed on the given time-frequency resource for HARQ feedback (each UE feeds back 1 bit of HARQ information).

[0159] For the HARQ-ACK of mechanism 1 and mechanism 2 of unicast and groupcast in sideline communication, each UE needs to feedback PSFCH with one sequence corresponding to NACK and another sequence corresponding to ACK. Therefore, the concept of cyclic shift pair is introduced in sideline communication. A cyclic shift pair (or a cyclic shift pair corresponding to a cyclic shift pair number) includes two different cyclic shifts. In the specification of the present invention, To indicate the number of cyclic shift pairs, the cyclic shift pairs are numbered from 0 to

[0160] Cyclic shift α Method for determining

[0161] In the description of the present invention, the cyclic shift α may also be α l Indicates that α and α l The methods for determining α include but are not limited to the following methods:

[0162]

[0163] in,

[0164] m o represents the initial cyclic shift;

[0165] l represents the number of OFDM symbols in PSFCH transmission; since only the single-symbol PSFCH format is currently supported, l=0 can be considered;

[0166] l′ represents the number of the first OFDM symbol transmitted by PSFCH in the slot; current represents the number of the OFDM symbol transmitted by PSFCH in the slot;

[0167] function The specific definition is: The sequence c(n) is determined as follows:

[0168] c(n)=(x1(n+Nc)+x2(n+Nc))mod 2

[0169] x1(n+31)=(x1(n+3)+x1(n))mod 2

[0170] x2(n+31)=(x2(n+3)+x2(n+2)+x2(n+1)+x2(n))mod 2

[0171] Among them, N c = 1600, the initialization sequence of the first sequence x1(n) is x1(0) = 1, x1(n) = 0, n = 1, 2, ..., 30. The initialization sequence of the second sequence x2(n) can be expressed as That is c init The decimal value representing the initialization sequence of the sequence x2(n). init After obtaining the value of x2(n), the initialization sequence of x2(n) can be obtained (the length of the initialization sequence is also 31), and then x2(n) can be determined. Combined with the first sequence x1(n) (the length of the initialization sequence is equal to 31), the UE can determine the scrambling code sequence c(n). The solution of this patent provides a method for determining c init Based on this method, the sequence x2(n) can be determined, and the scrambling code sequence c(n) can be determined based on the given sequence x1(n);

[0172] Indicates the number of OFDM symbols contained in a slot;

[0173] Indicates the slot number in the system frame;

[0174] Each embodiment of this patent includes determining m in the above method cs method.

[0175] UE group identifier in multicast mechanism 2

[0176] In the embodiment of the present disclosure, the UE's group identifier in the multicast is M ID Optionally, in the sideline communication groupcast mechanism 2, the higher layers (or upper layers) indicate the group identifier M of the sideline communication UE. ID One implementation method is: if the total number of UEs included in the multicast group is N sizeGroup , then M ID The value range is 0 to N sizeGroup -1. The present invention is for M IDThe value of includes but is not limited to the above method.

[0177] Basic process of LTE V2X (sidelink) communication

[0178] Figure 1 Figure 1 is a schematic diagram showing LTE V2X UE sideline communication. First, UE1 sends sideline 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 sideline 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:

[0179] 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.

[0180] 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 starting sub-channel and the number of consecutive sub-channels are indicated by the frequency domain resource indication field of SCI format 1.

[0181] LTE V2X resource allocation method Transmission Mode 3 / 4

[0182] Figure 2It 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:

[0183] 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.

[0184] 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.

[0185] 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.

[0186] 2) Resource allocation based on UE sensing (Transmission Mode 4): The resource allocation 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.

[0187] Parameter set (numerology) in NR (including NR sidelink) and NR (including NR sidelink slot

[0188] The parameter set numerology includes two meanings: subcarrier spacing and cyclic prefix CP length. Among them, NR supports 5 subcarrier spacings, namely 15k, 30k, 60k, 120k, and 240kHz (corresponding to μ=0, 1, 2, 3, and 4). Table 4.2-1 shows the supported transmission parameter sets, as shown below.

[0189] Table 4.2-1 Subcarrier spacing supported by NR

[0190] μ <![CDATA[Δf=2 μ ·15[kHz]]]> CP (Cyclic Prefix) 0 15 normal 1 30 normal 2 60 Normal, Extended 3 120 normal 4 240 normal

[0191] 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 slot contains OFDM symbols; for extended CP, each time slot contains OFDM symbols. For μ = 0, i.e. 15kHz subcarrier spacing, 1 time slot = 1ms; for μ = 1, i.e. 30kHz subcarrier spacing, 1 time slot = 0.5ms; for μ = 2, i.e. 60kHz subcarrier spacing, 1 time slot = 0.25ms, and so on.

[0192] NR and LTE have the same definition of subframe, which means 1ms. For the subcarrier spacing configuration μ, the slot number within 1 subframe (1ms) can be expressed as The range is 0 to The slot number within a system frame (frame, duration 10ms) can be expressed as The range is 0 to in, and The definitions of different subcarrier spacings μ are shown in the following table.

[0193] Table 4.3.2-1: Number of symbols in each slot, number of slots in each system frame, number of slots in each subframe under normal CP

[0194]

[0195] Table 4.3.2-2: Number of symbols in each slot, number of slots in each system frame, number of slots in each subframe when using extended CP (60kHz)

[0196]

[0197] On the NR carrier, the system frame (or, simply referred to as frame) number SFN ranges from 0 to 1023. The concept of direct system frame number DFN is introduced in sidelink communication, and the number range is also 0 to 1023. The above description of the relationship between system frames and numerology can also be applied to direct system frames (Direct Frame). For example, the duration of a direct system frame is also equal to 10ms. For a subcarrier spacing of 15kHz, a direct system frame includes 10 time slots, and so on. DFN is applied to timing on the sidelink carrier.

[0198] Sidelink resource pool

[0199] In sidelink communication, the resources sent and received by the UE belong to the resource pool. For example, for the transmission mode based on base station scheduling in sidelink communication (transmission mode 1 in NR sidelink communication), the base station schedules transmission resources for the sidelink UE in the resource pool, or, for the transmission mode based on UE perception in sidelink communication (transmission mode 2 in NR sidelink communication), the UE determines the transmission resources in the resource pool.

[0200] [Example 1]

[0201] like Figure 3 As shown, in the first embodiment of the present invention, the method performed by the user equipment may include:

[0202] In step S101, the sidelink communication user equipment determines configuration information of a resource pool of the sidelink communication.

[0203] Optionally, the configuration information of the sideline communication resource pool is configuration information sent by the base station through RRC signaling.

[0204] Optionally, the configuration information of the sideline communication resource pool is included in pre-configuration information of the user equipment.

[0205] Optionally, the configuration information of the sideline communication resource pool includes configuration information rbSetPSFCH of the PRB set actually used for PSFCH transmission and reception. Optionally, the configuration information of the PRB set actually used for PSFCH transmission and reception is a bitmap indicating rbSetPSFCH. Optionally, Equal to the number of 1s or the number of 0s in the bitmap indication rbSetPSFCH.

[0206] Optionally, the configuration information of the sideline communication resource pool includes configuration information N of the number of subchannels. subch .

[0207] Optionally, the configuration information of the sideline communication resource pool includes configuration information of the PSFCH resource period.

[0208] Optionally, the configuration information of the sideline communication resource pool includes configuration information of the number of cyclic shift pairs.

[0209] Optionally, the configuration information of the sideline communication resource pool includes initial cyclic shift configuration information m0. Optionally, the value range of m0 is 0 to 11, or m0 is in the unit of cyclic shift pair and the value range is 0 to

[0210] Optionally, the configuration information of the sideline communication resource pool includes an indication information, wherein the indication information indicates (configures) a mapping relationship between PSSCH and PSFCH. yes: or, Equal to the number of subchannels occupied by PSSCH transmission.

[0211] In step S102, the user equipment receives sideline communication control information SCI and corresponding (or, associated) PSSCH sent by other user equipments.

[0212] Optionally, the SCI includes a first level (1 st stage) SCI, and / or, second level (2 nd stage)SCI.

[0213] Optionally, the first-level SCI and / or the second-level SCI includes the number of sub-channels occupied by the corresponding PSSCH transmission. instructions.

[0214] Optionally, the first level SCI and / or the second level SCI includes a source ID P of the other user equipment. ID Optionally, the source ID is an 8-bit or 16-bit bit string.

[0215] Optionally, the higher layers (or upper layers) indicate the user equipment group internal identifier MID Optionally, if the PSSCH transmission is unicast transmission, or the user equipment determines that the HARQ feedback mechanism is mechanism 1 according to the first level SCI and / or the second level SCI, then M ID =0. Optionally, if the user equipment determines that the HARQ feedback mechanism is mechanism 2 according to the first level SCI and / or the second level SCI, then M ID Indicates the intra-group identifier of the user equipment.

[0216] In step S103, the user equipment determines m cs The value of the cyclic shift α(α l ).

[0217] Optionally, the user equipment determines m according to the number (or index) i of the cyclic shift pair. cs The numerical value of .

[0218] Optionally, for NACK(0) feedback, m cs =i; for ACK(1) feedback, m cs =i+6. Alternatively, for NACK(0) feedback, m cs =i+6; for ACK(1) feedback, m cs =i.

[0219] or,

[0220] Optionally, the user equipment determines m according to the cyclic shift i′ corresponding to the number (or index) i of the cyclic shift pair. cs Optionally, the corresponding relationship between the i and the i′ is pre-defined, or fixed, or (pre) configured.

[0221] Optionally, the Alternatively, the i′ is an integer between 0 and 11. Optionally, for NACK(0) feedback, m cs =i′; for ACK(1) feedback, m cs =(i′+6)mod12, or, m cs =(i′+6). Alternatively, for NACK(0) feedback, m cs =(i′+6)mod12, or, m cs =(i′+6); for ACK(1) feedback, m cs =i′. Or,

[0222] Optionally, the Alternatively, the i′ is an integer between 0 and 11. Optionally, for NACK(0) feedback, m cs =i′; for ACK(1) feedback, or, Or, optionally, for NACK(0) feedback, or, For ACK(1) feedback, m cs =i′.

[0223] Among them, optionally, the number of the cyclic shift pairs wherein, optionally, Optionally, or or,

[0224] [Example 2]

[0225] like Figure 3 As shown, in the second embodiment of the present invention, the method performed by the user equipment may include:

[0226] In step S101, the sidelink communication user equipment determines configuration information of a resource pool of the sidelink communication.

[0227] Optionally, the configuration information of the sideline communication resource pool is configuration information sent by the base station through RRC signaling.

[0228] Optionally, the configuration information of the sideline communication resource pool is included in pre-configuration information of the user equipment.

[0229] Optionally, the configuration information of the sideline communication resource pool includes configuration information rbSetPSFCH of the PRB set actually used for PSFCH transmission and reception. Optionally, the configuration information of the PRB set actually used for PSFCH transmission and reception is a bitmap indicating rbSetPSFCH. Optionally, Equal to the number of 1s or the number of 0s in the bitmap indication rbSetPSFCH.

[0230] Optionally, the configuration information of the sideline communication resource pool includes configuration information N of the number of subchannels. subch .

[0231] Optionally, the configuration information of the sideline communication resource pool includes configuration information of the PSFCH resource period.

[0232] Optionally, the configuration information of the sideline communication resource pool includes configuration information of the number of cyclic shift pairs.

[0233] Optionally, the configuration information of the sideline communication resource pool includes initial cyclic shift configuration information m0. Optionally, the value range of m0 is 0 to 11, or m0 is in the unit of cyclic shift pair and the value range is 0 to

[0234] In step S102, the user equipment receives sideline communication control information SCI and corresponding (or, associated) PSSCH sent by other user equipments.

[0235] Optionally, the SCI includes a first level (1 st stage) SCI, and / or, second level (2 nd stage)SCI.

[0236] Optionally, the first-level SCI and / or the second-level SCI includes the number of sub-channels occupied by the corresponding PSSCH transmission. instructions.

[0237] Optionally, the first-level SCI and / or the second-level SCI includes an indication information, wherein the indication information indicates a mapping relationship between PSSCH and PSFCH. for: or, Equal to the

[0238] Optionally, the first level SCI and / or the second level SCI includes a source ID P of the other user equipment. ID Optionally, the source ID is an 8-bit or 16-bit bit string.

[0239] Optionally, the higher layers (or upper layers) indicate the user equipment group internal identifier M ID Optionally, if the PSSCH transmission is unicast transmission, or the user equipment determines that the HARQ feedback mechanism is mechanism 1 according to the first level SCI and / or the second level SCI, then M ID=0. Optionally, if the user equipment determines that the HARQ feedback mechanism is mechanism 2 according to the first level SCI and / or the second level SCI, then M ID Indicates the intra-group identifier of the user equipment.

[0240] In step S103, the user equipment determines m cs The value of the cyclic shift α(α l ).

[0241] Optionally, the user equipment determines m according to the number (or index) i of the cyclic shift pair. cs The numerical value of .

[0242] Optionally, for NACK(0) feedback, m cs =i; for ACK(1) feedback, m cs =i+6. Alternatively, for NACK(0) feedback, m cs =i+6; for ACK(1) feedback, m cs =i.

[0243] or,

[0244] Optionally, the user equipment determines m according to the cyclic shift i′ corresponding to the number (or index) i of the cyclic shift pair. cs Optionally, the corresponding relationship between the i and the i′ is pre-defined, or fixed, or (pre) configured.

[0245] Optionally, the Alternatively, the i′ is an integer between 0 and 11. Optionally, for NACK(0) feedback, m cs =i′; for ACK(1) feedback, m cs =(i′+6)mod12, or, m cs =(i′+6). Alternatively, for NACK(0) feedback, m cs =(i′+6)mod12, or, m cs =(i′+6); for ACK(1) feedback, m cs =i′. Or,

[0246] Optionally, the Alternatively, the i′ is an integer between 0 and 11. Optionally, for NACK(0) feedback, m cs =i′; for ACK(1) feedback, or, Or, optionally, for NACK(0) feedback, or, For ACK(1) feedback, m cs =i′.

[0247] Among them, optionally, the number of the cyclic shift pairs wherein, optionally, Optionally, or or,

[0248] [Example 3]

[0249] like Figure 3 As shown, in the third embodiment of the present invention, the method performed by the user equipment may include:

[0250] In step S101, the sidelink communication user equipment determines configuration information of a resource pool of the sidelink communication.

[0251] Optionally, the configuration information of the sideline communication resource pool is configuration information sent by the base station through RRC signaling.

[0252] Optionally, the configuration information of the sideline communication resource pool is included in pre-configuration information of the user equipment.

[0253] Optionally, the configuration information of the sideline communication resource pool includes configuration information rbSetPSFCH of the PRB set actually used for PSFCH transmission and reception. Optionally, the configuration information of the PRB set actually used for PSFCH transmission and reception is a bitmap indicating rbSetPSFCH. Optionally, is equal to the number of 1s in the bitmap indication rbSetPSFCH, or the number of 0s. Optionally, the configuration information of the sideline communication resource pool includes configuration information N of the number of subchannels. subch .

[0254] Optionally, the configuration information of the sideline communication resource pool includes configuration information of the PSFCH resource period.

[0255] Optionally, the configuration information of the sideline communication resource pool includes configuration information of the number of cyclic shift pairs.

[0256] Optionally, the configuration information of the sideline communication resource pool includes initial cyclic shift configuration information m0. Optionally, the value range of m0 is 0 to 11, or m0 is in the unit of cyclic shift pairs and the value range is 0 to 11.

[0257] In step S102, the user equipment receives sideline communication control information SCI and corresponding (or, associated) PSSCH sent by other user equipments.

[0258] Optionally, the SCI includes a first level (1 st stage) SCI, and / or, second level (2 nd stage)SCI.

[0259] Optionally, the first level SCI and / or the second level SCI includes a source ID P of the other user equipment. ID Optionally, the source ID is an 8-bit or 16-bit bit string.

[0260] Optionally, the higher layers (or upper layers) indicate the user equipment group internal identifier M ID Optionally, if the PSSCH transmission is unicast transmission, or the user equipment determines that the HARQ feedback mechanism is mechanism 1 according to the first level SCI and / or the second level SCI, then M ID =0. Optionally, if the user equipment determines that the HARQ feedback mechanism is mechanism 2 according to the first level SCI and / or the second level SCI, then M ID Indicates the intra-group identifier of the user equipment.

[0261] In step S103, the user equipment determines m cs The value of the cyclic shift α(α l ).

[0262] Optionally, the user equipment determines m according to the number (or index) i of the cyclic shift pair. cs The numerical value of .

[0263] Optionally, for NACK(0) feedback, m cs =i; for ACK(1) feedback, m cs =i+6. Alternatively, for NACK(0) feedback, m cs=i+6; for ACK(1) feedback, m cs =i.

[0264] or,

[0265] Optionally, the user equipment determines m according to the cyclic shift i′ corresponding to the number (or index) i of the cyclic shift pair. cs Optionally, the corresponding relationship between the i and the i′ is pre-defined, or fixed, or (pre) configured.

[0266] Optionally, the Alternatively, the i′ is an integer between 0 and 11. Optionally, for NACK(0) feedback, m cs =i′; for ACK(1) feedback, m cs =(i′+6)mod12, or, m cs =(i′+6). Alternatively, for NACK(0) feedback, m cs =(i′+6)mod12, or, m cs =(i′+6); for ACK(1) feedback, m cs =i′. Or,

[0267] Optionally, the Alternatively, the i′ is an integer between 0 and 11. Optionally, for NACK(0) feedback, m cs =i′; for ACK(1) feedback, or, Or, optionally, for NACK(0) feedback, or, For ACK(1) feedback, m cs =i′.

[0268] Among them, optionally, the number of the cyclic shift pairs wherein, optionally, Optionally, or,

[0269] [Example 4]

[0270] like Figure 3 As shown, in the fourth embodiment of the present invention, the method performed by the user equipment may include:

[0271] In step S101, the sidelink communication user equipment determines configuration information of a resource pool of the sidelink communication.

[0272] Optionally, the configuration information of the sideline communication resource pool is configuration information sent by the base station through RRC signaling.

[0273] Optionally, the configuration information of the sideline communication resource pool is included in pre-configuration information of the user equipment.

[0274] Optionally, the configuration information of the sideline communication resource pool includes configuration information rbSetPSFCH of the PRB set actually used for PSFCH transmission and reception. Optionally, the configuration information of the PRB set actually used for PSFCH transmission and reception is a bitmap indicating rbSetPSFCH. Optionally, Equal to the number of 1s or the number of 0s in the bitmap indication rbSetPSFCH.

[0275] Optionally, the configuration information of the sideline communication resource pool includes configuration information N of the number of subchannels. subch .

[0276] Optionally, the configuration information of the sideline communication resource pool includes configuration information of the PSFCH resource period.

[0277] Optionally, the configuration information of the sideline communication resource pool includes configuration information of the number of cyclic shift pairs.

[0278] Optionally, the configuration information of the sideline communication resource pool includes initial cyclic shift configuration information m0. Optionally, the value range of m0 is 0 to 11, or m0 is in the unit of cyclic shift pair and the value range is 0 to

[0279] In step S102, the user equipment receives sideline communication control information SCI and corresponding (or, associated) PSSCH sent by other user equipments.

[0280] Optionally, the SCI includes a first level (1 st stage) SCI, and / or, second level (2 nd stage)SCI.

[0281] Optionally, the first-level SCI and / or the second-level SCI includes the number of sub-channels occupied by the corresponding PSSCH transmission. instructions.

[0282] Optionally, the first level SCI and / or the second level SCI includes a source ID P of the other user equipment. ID Optionally, the source ID is an 8-bit or 16-bit bit string.

[0283] Optionally, the higher layers (or upper layers) indicate the user equipment group internal identifier M ID Optionally, if the PSSCH transmission is unicast transmission, or the user equipment determines that the HARQ feedback mechanism is mechanism 1 according to the first level SCI and / or the second level SCI, then M ID =0. Optionally, if the user equipment determines that the HARQ feedback mechanism is mechanism 2 according to the first level SCI and / or the second level SCI, then M ID Indicates the intra-group identifier of the user equipment.

[0284] In step S103, the user equipment determines m cs The value of the cyclic shift α(α l ).

[0285] Optionally, the user equipment determines m according to the number (or index) i of the cyclic shift pair. cs The numerical value of .

[0286] Optionally, for NACK(0) feedback, m cs =i; for ACK(1) feedback, m cs =i+6. Alternatively, for NACK(0) feedback, m cs =i+6; for ACK(1) feedback, m cs =i.

[0287] or,

[0288] Optionally, the user equipment determines m according to the cyclic shift i′ corresponding to the number (or index) i of the cyclic shift pair. cs Optionally, the corresponding relationship between the i and the i′ is pre-defined, or fixed, or (pre) configured.

[0289] Optionally, the Alternatively, the i′ is an integer between 0 and 11. Optionally, for NACK(0) feedback, m cs =i′; for ACK(1) feedback, m cs =(i′+6)mod12, or, m cs =(i′+6). Alternatively, for NACK(0) feedback, m cs =(i′+6)mod12, or, m cs =(i′+6); for ACK(1) feedback, m cs =i′. Or,

[0290] Optionally, the Alternatively, the i′ is an integer between 0 and 11. Optionally, for NACK(0) feedback, m cs =i′; for ACK(1) feedback, or, Or, optionally, for NACK(0) feedback, or, For ACK(1) feedback, m cs =i′.

[0291] Among them, optionally, the number of the cyclic shift pairs wherein, optionally, Optionally, or,

[0292] Figure 4 is a block diagram showing a user equipment UE involved in the present disclosure. Figure 4 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.

[0293] 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.

[0294] 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.

[0295] 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.

[0296] 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.

[0297] In addition, each functional module or each feature of the base station equipment and terminal equipment used in each of the above embodiments 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.

[0298] 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, the method comprising: Determine the sideline communication resource pool configuration information sent from the base station or included in the pre-configuration, wherein the sideline communication resource pool configuration information includes the number configuration of the cyclic shift pairs; receiving sideline communication control information SCI and a corresponding or associated physical sideline communication shared channel PSSCH from another user equipment, wherein the PSSCH is a unicast transmission; and A cyclic shift of a physical sideline communication feedback channel PSFCH corresponding to the PSSCH is determined based on at least one value, wherein This value is equal to ,in is the number of cyclic shift pairs, is the circular shift pair index, and , The PSFCH carries a hybrid automatic repeat request HARQ ACK or HARQ NACK. The cyclic shift pair refers to a pair consisting of a first cyclic shift for HARQ ACK and a second cyclic shift for HARQ NACK, In the case where the PSFCH carries HARQ ACK, the cyclic shift of the PSFCH is the first cyclic shift, In the case where the PSFCH carries HARQ NACK, the cyclic shift of the PSFCH is the second cyclic shift, The sideline communication resource pool configuration information includes a bitmap, and the bitmap is configuration information of a physical resource block PRB set actually used for the PSFCH. The sideline communication resource pool configuration information includes the configuration information of the PSFCH resource period , The sideline communication resource pool configuration information includes configuration information N of the number of subchannels. subch , , , or , is equal to the number of 1s in the bitmap, is the number of subchannels occupied by the PSSCH, P ID is the source identifier of the other user's device, and M ID = 0。 2. A user equipment, comprising: processor; and a memory having instructions stored therein, Wherein, based on the instruction, the processor is configured to: Determine the sideline communication resource pool configuration information sent from the base station or included in the pre-configuration, wherein the sideline communication resource pool configuration information includes the number configuration of the cyclic shift pairs; receiving sideline communication control information SCI and a corresponding or associated physical sideline communication shared channel PSSCH from another user equipment, wherein the PSSCH is a unicast transmission; and A cyclic shift of a physical sideline communication feedback channel PSFCH corresponding to the PSSCH is determined based on at least one value, wherein This value is equal to ,in is the number of cyclic shift pairs, is the circular shift pair index, and , The PSFCH carries a hybrid automatic repeat request HARQ ACK or HARQ NACK. The cyclic shift pair refers to a pair consisting of a first cyclic shift for HARQ ACK and a second cyclic shift for HARQ NACK, In the case where the PSFCH carries HARQ ACK, the cyclic shift of the PSFCH is the first cyclic shift, In the case where the PSFCH carries HARQ NACK, the cyclic shift of the PSFCH is the second cyclic shift, The sideline communication resource pool configuration information includes a bitmap, and the bitmap is configuration information of a physical resource block PRB set actually used for the PSFCH. The sideline communication resource pool configuration information includes the configuration information of the PSFCH resource period , The sideline communication resource pool configuration information includes configuration information N of the number of subchannels. subch , , , or , is equal to the number of 1s in the bitmap, is the number of subchannels occupied by the PSSCH, P ID is the source identifier of the other user's device, and M ID = 0。

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