Method performed by a user equipment and user equipment

Abstract

According to the present invention, a method executed by a user equipment is provided, which is characterized by including: obtaining information related to a resource pool, and determining a set of time slots in the resource pool. Wherein, the information related to the resource pool includes SL subcarrier spacing configuration, duplex mode, TDD configuration information, time domain resource period, time domain resource indication, and information related to S-SSB.

Description

Technical Field

[0001] The present invention relates to a method performed by a user equipment and the user equipment. Background Art

[0002] In 5G V2X, how to determine the set of time slots in a resource pool under different system configurations is a problem to be solved.

[0003] Prior Art Documents

[0004] Non-Patent Documents

[0005] Non-Patent Document 1: RP-152293, New WI proposal: Support for V2V services based on LTE sidelink

[0006] Non-Patent Document 2: RP-170798, New WID on 3GPP V2X Phase 2

[0007] Non-Patent Document 3: RP-170855, New WID on New Radio Access Technology

[0008] Non-Patent Document 4: RP-190766, New WID on 5G V2X with NR sidelink Summary of the Invention

[0009] To solve at least part of the above problems, the present invention provides a method performed by a user equipment and the user equipment, which enables different UEs to perform efficient SL transmission and reception based on the same resource pool by flexibly determining the set of time slots in the resource pool.

[0010] According to the present invention, a method performed by a user equipment is proposed, which is characterized by including: obtaining information related to a resource pool, and determining the set of time slots in the resource pool. Wherein, the information related to the resource pool includes SL subcarrier spacing configuration, duplex mode, TDD configuration information, time domain resource period, time domain resource indication, information related to S-SSB.

[0011] Preferably, according to the TDD configuration information, determine the quasi-uplink time slots within the TDD configuration period, wherein the quasi-uplink time slots are at least symbol symbol ……, symbol time slots configured as uplink symbols. Wherein, is the number of the first symbol configured for SL transmission, is the number of symbols configured for SL transmission.

[0012] Preferably, if TDD mode 1 is configured and TDD mode 2 is not configured, the quasi-uplink time slots within the TDD configuration period are the last number where μ, μ ref , u slots , u sym , are respectively the SL subcarrier spacing configuration, the reference subcarrier spacing in the TDD configuration, the number of full up-link time slots in TDD mode 1, the number of up-link symbols in TDD mode 1, the number of symbols in a time slot, and the number of the first symbol configured for SL transmission.

[0013] Preferably, if TDD mode 1 is configured and TDD mode 2 is configured, the quasi-uplink time slots within the TDD configuration period include the last number of time slots in the period of TDD mode 1, and the last number of time slots in the period of TDD mode 2, where where, if then N 0，1 = 1, otherwise N 0，1 = 0. where, if then N 0，2 = 1, otherwise N 0，2 = 0. Where μ, μ ref , u slots , u sym , U slots，2 , U sym，2 , are respectively the SL subcarrier spacing configuration, the reference subcarrier spacing in the TDD configuration, the number of full up-link time slots in TDD mode 1, the number of up-link symbols in TDD mode 1, the number of full up-link time slots in TDD mode 2, the number of up-link symbols in TDD mode 2, the number of symbols in a time slot, and the number of the first symbol configured for SL transmission.

[0014] Preferably, the time domain resource indication corresponds to a bitmap, and the length of the bitmap is related to the number of quasi-uplink time slots within the TDD configuration period.

[0015] Preferably, the time domain resource indication corresponds to a bitmap, and the length of the bitmap is related to the SL subcarrier spacing configuration.

[0016] Preferably, the time domain resource indication corresponds to a bitmap, and the length of the bitmap is related to the TDD configuration period.

[0017] Preferably, before applying the time domain resource indication, the last N removed elements in the time slot set in the resource pool are removed, where where N RP，0 is equal to the number of elements in the time slot set in the resource pool before removing the N removed elements, and is equal to the PSFCH resource configuration period.

[0018] Preferably, after applying the time domain resource indication, the last N removed elements in the time slot set in the resource pool are removed, where where N Rp，0 is equal to the number of elements in the time slot set in the resource pool before removing the N removed elements, and is equal to the PSFCH resource configuration period.

[0019] In addition, according to the present invention, a user equipment is provided, including: a processor; and a memory storing instructions, where the instructions, when run by the processor, execute the above method.

[0020] Therefore, the present invention provides a method, by flexibly determining the time slot set in the resource pool, enabling different UEs to perform efficient SL transmission and reception based on the same resource pool. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Through the following detailed description in conjunction with the drawings, the above and other features of the present invention will become more obvious, where:

[0022] Figure 1 is a flowchart showing a method executed by a user equipment according to Embodiment 1 of the present invention.

[0023] Figure 2 shows a block diagram of a user equipment UE involved in the present invention. DETAILED DESCRIPTION

[0024] The present invention will be described in detail below in conjunction with the drawings and specific embodiments. It should be noted that the present invention should not be limited to the specific embodiments described below. Additionally, for the sake of simplicity, the detailed description of well-known technologies not directly related to the present invention is omitted to prevent confusion in understanding the present invention.

[0025] The following uses the 5G mobile communication system and its subsequent evolved versions as an example application environment, and specifically describes multiple embodiments according to the present invention. However, it should be noted that the present invention is not limited to the following embodiments, but is applicable to more other wireless communication systems, such as communication systems after 5G and 4G mobile communication systems before 5G, etc.

[0026] The following describes some terms related to the present invention. Unless otherwise specified, the terms related to the present invention are defined herein. The terms given in the present invention may have different naming methods in LTE, LTE-Advanced, LTE-Advanced Pro, NR, and subsequent communication systems, but unified terms are used in the present invention, and when applied to a specific system, they can be replaced with the terms used in the corresponding system.

[0027] 3GPP: 3rd Generation Partnership Project, the Third Generation Partnership Project

[0028] AGC: Automatic Gain Control, Automatic Gain Control

[0029] AL: Aggregation Level, Aggregation Level

[0030] AS: Access Stratum, Access Stratum

[0031] BWP: Bandwidth Part, Bandwidth Part

[0032] CA: Carrier Aggregation, Carrier Aggregation

[0033] CCE: control-channel element, control channel element

[0034] CORESET: control-resource set, control resource set

[0035] CP: Cyclic Prefix, Cyclic Prefix

[0036] CP-OFDM: Cyclic Prefix Orthogonal Frequency Division Multiplexing, Cyclic Prefix Orthogonal Frequency Division Multiplexing

[0037] CRB: Common Resource Block, Common Resource Block

[0038] CRC: Cyclic Redundancy Check, Cyclic Redundancy Check

[0039] CSI: Channel-state Information, Channel State Information

[0040] CSS: Common Search Space, Common Search Space

[0041] DC: Dual Connectivity, Dual Connectivity

[0042] DCI: Downlink Control Information, Downlink Control Information

[0043] DFN: Direct Frame Number, Direct Frame Number

[0044] DFT-s-OFDM: Discrete Fourier Transformation Spread Orthogonal Frequency Division Multiplexing, Discrete Fourier Transformation Spread Orthogonal Frequency Division Multiplexing

[0045] DL: Downlink, Downlink

[0046] DL-SCH: Downlink Shared Channel, Downlink Shared Channel

[0047] DM-RS: Also known as DMRS, Demodulation reference signal, Demodulation reference signal

[0048] eMBB: Enhanced Mobile Broadband, Enhanced Mobile Broadband Communication

[0049] eNB: E-UTRAN Node B, E-UTRAN Node B

[0050] E-UTRAN: Evolved UMTS Terrestrial Radio Access Network, Evolved UMTS Terrestrial Radio Access Network

[0051] FDD: Frequency Division Duplex, Frequency Division Duplex

[0052] FDRA: Frequency Domain Resource Assignment, Frequency Domain Resource Assignment

[0053] FR1: Frequency Range 1, the frequency range 1

[0054] FR2: Frequency Range 2, the frequency range 2

[0055] GLONASS: GLObal NAvigation Satellite System, the Global Navigation Satellite System

[0056] gNB: NR Node B, the NR Node B

[0057] GNSS: Global Navigation Satellite System, the Global Navigation Satellite System

[0058] GPS: Global Positioning System, the Global Positioning System

[0059] HARQ: Hybrid Automatic Repeat Request, the Hybrid Automatic Repeat Request

[0060] ID: Identity (or Identifier), the identity, the identifier

[0061] IE: Information Element, the information element

[0062] IP: Internet Protocol, the Internet Protocol

[0063] LCID: Logical Channel ID, the logical channel identifier

[0064] LSB: Least Significant Bit, the least significant bit

[0065] LTE: Long Term Evolution, the Long Term Evolution

[0066] LTE-A: Long Term Evolution-Advanced, the Long Term Evolution-Advanced

[0067] MAC: Medium Access Control, the Medium Access Control

[0068] MAC CE: MAC Control Element, the MAC control element

[0069] MCG: Master Cell Group, the Master Cell Group

[0070] MIB: Master Information Block, the master information block

[0071] MIB-SL: Master Information Block-Sidelink, the master information block - straight ahead

[0072] MIB-SL-V2X: Master Information Block-Sidelink-V2X, the master information block - straight ahead - vehicle-to-everything

[0073] MIB-V2X: Master Information Block-V2X, the master information block - vehicle-to-everything

[0074] MSB: Most Significant Bit, the most significant bit

[0075] mMTC: massive Machine Type Communication, massive machine type communication

[0076] NAS: Non-Access-Stratum, the non-access stratum

[0077] NDI: New Data Indicator, the new data indicator

[0078] NR: New Radio, the new radio

[0079] NUL: Normal Uplink, normal uplink

[0080] OFDM: Orthogonal Frequency Division Multiplexing, orthogonal frequency division multiplexing

[0081] PBCH: Physical Broadcast Channel, the physical broadcast channel

[0082] PDCCH: Physical Downlink Control Channel, the physical downlink control channel

[0083] PDCP: Packet Data Convergence Protocol, the packet data convergence protocol

[0084] PDSCH: Physical Downlink Shared Channel, the physical downlink shared channel

[0085] PSBCH: Physical Sidelink Broadcast Channel, Physical direct broadcast channel

[0086] PSCCH: Physical Sidelink Control Channel, Physical direct control channel

[0087] PSFCH: Physical Sidelink Feedback Channel, Physical direct feedback channel

[0088] PSSCH: Physical Sidelink Shared Channel, Physical direct shared channel

[0089] PRB: Physical Resource Block, Physical resource block

[0090] PSS: Primary Synchronization Signal, Primary synchronization signal

[0091] PSS-SL: Primary Synchronization Signal for Sidelink, Primary direct synchronization signal

[0092] PSSS: Primary idelink Synchronization Signal, Primary direct synchronization signal

[0093] PTAG: Primary Timing Advance Group, Primary timing advance group

[0094] PUSCH: Physical uplink shared channel, Physical uplink shared channel

[0095] PUCCH: Physical uplink control channel, Physical uplink control channel

[0096] QCL: Quasi co-location, Quasi co-location

[0097] QoS: Quality of Service, Quality of Service

[0098] QZSS: Quasi-Zenith Satellite System, Quasi-Zenith Satellite System

[0099] RAR: Random Access Response, Random access response

[0100] RB: Resource Block, resource block

[0101] RE: Resource Element, resource element

[0102] REG: resource - element group, resource element group

[0103] RF: Radio Frequency, radio frequency

[0104] RLC: Radio Link Control, radio link control protocol

[0105] RNTI: Radio - Network Temporary Identifier, radio - network temporary identifier

[0106] RRC: Radio Resource Control, radio resource control

[0107] RV: Redundancy Version, redundancy version

[0108] S - BWP: Sidelink Bandwidth Part, sidelink bandwidth part

[0109] S - MB: Sidelink Master Information Block, sidelink master information block

[0110] S - PSS: Sidelink Primary Synchronization Signal, sidelink primary synchronization signal

[0111] S - SSB: Sidelink SS / PBCH block, sidelink synchronization signal / physical broadcast channel block

[0112] S - SSS: Sidelink Secondary Synchronization Signal, sidelink secondary synchronization signal

[0113] SCG: Secondary Cell Group, secondary cell group

[0114] SCI: Sidelink Control Information, sidelink control information

[0115] SCS: Subcarrier Spacing, subcarrier spacing

[0116] SDAP: Service Data Adaptation Protocol, the Service Data Adaptation Protocol

[0117] SFN: System Frame Number, the System Frame Number

[0118] SIB: System Information Block, the System Information Block

[0119] SL: Sidelink, straight ahead

[0120] SL BWP: Sidelink Bandwidth Part, the Sidelink Bandwidth Part

[0121] SL MIB: Sidelink Master Information Block, the Sidelink Master Information Block

[0122] SL PSS: Sidelink Primary Synchronization Signal, the Sidelink Primary Synchronization Signal

[0123] SL SS: Sidelink Synchronisation Signal, the Sidelink Synchronization Signal

[0124] SL SSID: Sidelink Synchronization Signal Identity (or Sidelink Synchronization Signal Identifier), the Sidelink Synchronization Signal Identity

[0125] SL SSB: Sidelink SS / PBCH block, the Sidelink SS / PBCH block

[0126] SL SSS: Sidelink Secondary Synchronization Signal, the Sidelink Secondary Synchronization Signal

[0127] SLSS: Sidelink Synchronisation Signal, the Sidelink Synchronization Signal

[0128] SLSS D: Sidelink Synchronization Signal Identity (or Sidelink Synchronization Signal Identifier), the Sidelink Synchronization Signal Identity

[0129] SLSSID: Sidelink Synchronization Signal Identity (or Sidelink Synchronization Signal Identifier), Sidelink Synchronization Signal Identity

[0130] SpCell: Special Cell, Special Cell

[0131] SRS: Sounding Reference Signal, Sounding Reference Signal

[0132] SSB: SS / PBCH block, Synchronization Signal / Physical Broadcast Channel Block

[0133] SSB-SL: SS / PBCH block for Sidelink, Sidelink Synchronization Signal / Physical Broadcast Channel Block

[0134] SSS: Secondary Synchronization Signal, Secondary Synchronization Signal

[0135] SSS-SL: Secondary Synchronization Signal for Sidelink, Sidelink Secondary Synchronization Signal

[0136] SSSB: Sidelink SS / PBCH block, Sidelink Synchronization Signal / Physical Broadcast Channel Block

[0137] SSSS: Secondary Sidelink Synchronization Signal, Secondary Sidelink Synchronization Signal

[0138] STAG: Secondary Timing Advance Group, Secondary Timing Advance Group

[0139] Sub-channel: Sub-channel

[0140] SUL: Supplementary Uplink, Supplementary Uplink

[0141] TA: Timing Advance, Timing Advance

[0142] TAG: Timing Advance Group, Timing Advance Group

[0143] TB: Transport Block, Transport Block

[0144] TCP: Transmission Control Protocol, Transmission Control Protocol

[0145] TDD: Time Division Duplex, Time Division Duplex

[0146] TPC: Transmit power control, Transmit power control

[0147] UE: User Equipment, User Equipment

[0148] UL: Uplink, Uplink

[0149] UMTS: Universal Mobile Telecommunications System, Universal Mobile Telecommunications System

[0150] URLLC: Ultra-Reliable and Low Latency Communication, Ultra-Reliable and Low Latency Communication

[0151] USS: UE-specific Search Space, UE-specific Search Space

[0152] V2I: Vehicle-to-Infrastructure, Vehicle-to-Infrastructure

[0153] V2N: Vehicle-to-network, Vehicle-to-network

[0154] V2P: Vehicle-to-Pedestrian, Vehicle-to-Pedestrian

[0155] V2V: Vehicle-to-vehicle, Vehicle-to-vehicle

[0156] V2X: Vehicle-to-everything, Vehicle-to-everything

[0157] VRB: Virtual Resource Block, Virtual Resource Block

[0158] In all embodiments and implementations of the present invention, unless otherwise specified:

[0159] · Optionally, where applicable, "send" and "transmit" may be interchangeable.

[0160] · Optionally, where applicable, "within the SL carrier" and "on the SL carrier" may be interchangeable.

[0161] · Optionally, where applicable, "within the SL BWP" and "on the SL BWP" can be interchanged.

[0162] · Optionally, if S1 and S2 are two sets, then S1 - S2 represents the "difference set" of set S1 and set S2, that is, the set of elements in set S1 that do not belong to set S2.

[0163] · Optionally, if S1 and S2 are two sets, then

[0164] · Optionally, after operating on the elements in set S1 (such as filtering, transformation, etc.) to obtain set S2, it can be equivalent to directly operating on the original set S1 to obtain the updated set S1.

[0165] · Optionally, "higher layer" can refer to one or more protocol layers or protocol sub - layers above the physical layer. For example, the MAC layer, the RLC layer, the PDCP layer, the PC5 RRC layer, the PC5 - S layer, the RRC layer, the V2X layer, the application layer, the V2X application layer, etc.

[0166] · Optionally, "pre - configuration" can be pre - configured through higher - layer protocols / signaling. For example, pre - setting (such as pre - setting according to the specifications of higher - layer protocols) in a specific storage location in the UE, or pre - setting (such as pre - setting according to the specifications of higher - layer protocols) in a specific storage location accessible by the UE.

[0167] · Optionally, "configuration" can be configured through higher - layer protocols / signaling. For example, configuring for the UE through RRC signaling.

[0168] · Optionally, time - domain resources can also be referred to as time resources.

[0169] · Optionally, frequency - domain resources can also be referred to as frequency resources.

[0170] · Optionally, "symbol" refers to "OFDM symbol".

[0171] · Optionally, within a time slot, the numbering of OFDM symbols can start from 0. For example, for normal CP, the set of numbers of OFDM symbols within a time slot can be {0, 1,..., 13}. Another example is for extended CP, the set of numbers of OFDM symbols within a time slot can be {0, 1,..., 11}.

[0172] · Optionally, a resource block may refer to a virtual resource block (VRB), or a physical resource block (PRB), or a common resource block (CRB), or a resource block defined in other ways.

[0173] · Optionally, within a resource block, the subcarrier numbers may start from 0. For example, the set of subcarrier numbers within a resource block may be {0, 1,..., 11}.

[0174] In communication based on D2D (Device to Device) technology, the interface between devices (also known as user equipment, UE) may be referred to as the PC5 interface, and the corresponding transmission link may be referred to as a "direct" or "sidelink" (SL) link at the physical layer to distinguish it from the uplink (UL) and downlink (DL) links. Communication based on the SL link may be referred to as SL communication. The SL link based on LTE technology may be referred to as the LTE SL link. The SL link based on NR technology may be referred to as the NR SL link. 5G V2X communication may be based on LTE SL or NR SL. Unless otherwise specified hereinafter, "SL" refers to NR SL.

[0175] The physical layer of the SL interface may support one or more modes of transmission in one or more scenarios of in-coverage, out-of-coverage, and partial-coverage scenarios, such as broadcast transmission, groupcast transmission, unicast transmission, and so on.

[0176] For FR1 (Frequency Range 1), the SCS (subcarrier spacing, denoted as Δf, unit: kHz) corresponding to the SL link can be 15 kHz (normal CP), or 30 kHz (normal CP), or 60 kHz (normal CP or extended CP); for FR2 (Frequency Range 2), the SCS corresponding to the SL link can be 60 kHz (normal CP or extended CP), or 120 kHz (normal CP). Each SCS corresponds to an SCS configuration (denoted as μ). For example, Δf = 15 kHz corresponds to μ = 0, Δf = 30 kHz corresponds to μ = 1, Δf = 60 kHz corresponds to μ = 2, Δf = 120 kHz corresponds to μ = 3, and so on; another example, for any given μ, Δf = 2 μ ·15 kHz. μ can be the SCS configuration of the SL carrier; for example, all SL transmissions in an SL carrier use the same SCS configuration and / or the same CP. μ can be the SCS configuration of the SL BWP (Sidelink Bandwidth Part, or S-BWP, or SBWP, or SL-BWP, or BWP-SL, or simply BWP); for example, all SL transmissions in an SL BWP use the same SCS configuration and / or the same CP. μ can be the SCS configuration of the resource pool; for example, all SL transmissions in a resource pool use the same SCS configuration and / or the same CP.

[0177] Signals and channels related to SL operations can include:

[0178] ·SL PSS (Sidelink Primary Synchronization Signal), or S-PSS, or SPSS, or SL-PSS, or PSS-SL, or PSSS (Primary Sidelink Synchronization Signal), etc.

[0179] · SL SSS (Sidelink Secondary Synchronization Signal, Sidelink Secondary Synchronization Signal), also known as S-SSS, or SSSS (Sidelink Secondary Synchronization Signal), or SL-SSS, or SSS-SL, or SSSS (Secondary Sidelink Synchronization Signal, Secondary Sidelink Synchronization Signal), and so on.

[0180] · PSBCH (Physical Sidelink Broadcast Channel).

[0181] · PSCCH (Physical Sidelink Control Channel).

[0182] · PSSCH (Physical Sidelink Shared Channel).

[0183] · PSFCH (Physical Sidelink Feedback Channel).

[0184] Together, the SL PSS, SL SSS, and PSBCH can be organized in a block form on time / frequency resources, such as being called S-SSB (Sidelink Synchronization Signal / PSBCH block, or SSS / PSBCH block, or straight-through synchronization signal / physical straight-through broadcast channel block), or being called SSS / PSBCH block, or being called SS / PSBCH block, or being called S-SS / PSBCH block, or being called SL SSB, or being called SSSB, or being called SL-SSB, or being called SSB-SL. The transmission bandwidth of the S-SSB (e.g., 11 resource blocks) can be located within the corresponding SL carrier (e.g., within one SL BWP configured within the SL carrier). The SL PSS and / or SL SSS can carry an SL SSID (Sidelink Synchronization Identity, or Sidelink Synchronization Identifier, straight-through synchronization identity, or Sidelink Synchronization Signal Identity, or Sidelink Synchronization Signal Identifier, straight-through synchronization signal identity, or being called SL-SSID, or being called SSID-SL, or being called SLSSID, or being called SLSS ID, or being called S-SSID, etc.), and the PSBCH can carry an SL MIB (Sidelink Master Information Block, straight-through master information block, or being called SL-MB, or being called S-MIB, or being called MIB-SL). The SL MIB can contain configuration information of the SL link, such as information related to the direct frame number (or called frame number) or direct half-frame number (or called half-frame number) or direct sub-frame number (or called sub-frame number) or direct time slot number (or called time slot number) where the PSBCH (or the corresponding S-SSB) carrying the SL MIB is located.

[0185] On the SL link, the time domain and / or frequency domain resources for transmitting S-SSB can be configured by higher layer parameters. For example, in the frequency domain, the position of S-SSB in the frequency domain can be configured by the parameter absoluteFrequencySSB-SL (or the parameter sl-AbsoluteFrequencySSB-r16). Also, in the time domain, one or more synchronization configuration items can be configured by the parameter sl-SyncConfigList-r16. In each synchronization configuration item, the number of S-SSBs within a period of 16 frames can be configured by the parameter numSSBwithinPeriod-SL (or the parameter sl-NumSSB-WithinPeriod-r16). S-SSBs, where the index of the slot in which the S-SSB with the number (or index) of is located within a period of 16 frames can be where can be configured by the parameter timeOffsetSSB-SL (or the parameter sl-TimeOffsetSSB-r16), and can be configured by the parameter timeIntervalSSB-SL (or the parameter sl-TimeInterval-r16).

[0186] Sometimes, the time domain resources and / or frequency domain resources configured for S-SSB in the SL carrier can be considered to correspond to candidate S-SSB (or referred to as S-SSB candidate). On the time domain and / or frequency domain resources corresponding to a candidate S-SSB, there may be one or more S-SSB transmissions simultaneously (e.g., from different UEs), or there may be no S-SSB transmission at all.

[0187] Sometimes, a slot configured with S-SSB (or configured with S-SSB resources, or configured with candidate S-SSB, or configured with candidate S-SSB resources) can also be referred to as a slot configured with SLSS (or configured with SLSS resources). Vice versa.

[0188] Synchronization sources related to SL synchronization (also known as synchronization references or synchronization reference sources) can include GNSS (Global Navigation Satellite System), gNB, eNB, and UE (such as NR UE, LTE UE, or NR UE or LTE UE). A UE acting as a synchronization source (e.g., a UE transmitting S-SSB) can be referred to as a SyncRef UE.

[0189] Examples of GNSS can include GPS (Global Positioning System), GLONASS (Global Navigation Satellite System), BeiDou (Compass Navigation Satellite System), Galileo (Galileo Navigation Satellite System), QZSS (Quasi-Zenith Satellite System), etc.

[0190] One or more (e.g., one) SL BWPs can be configured within an SL carrier. Within each SL BWP, the starting symbol for SL transmission within a time slot where SL transmission is possible can be configured via the parameter startSLsymbols (or the parameter sl-StartSymbol-r16) (e.g., denoting the number of the symbol within the time slot as ), and the number of symbols for SL transmission within the time slot can be configured via the parameter lengthSLsymbols (or the parameter sl-LengthSymbols-r16) (e.g., denoting the number of the symbols as ). The set of values of For example The set of values of For example The "symbols for SL transmission" can be referred to as "SL symbols". Denote the set of SL symbols within the time slot (in chronological order) as Then For example, if Then the set of SL symbols within the time slot is {7, 8, 9, 10, 11, 12, 13}.

[0191] Only time slots that meet certain conditions can be used for SL transmission. For example, at least the symbols symbols ……, symbols in the time slot are uplink symbols (such as semi-statically configured uplink symbols). Another example is that the time slot must be within the set of time slots of a configured resource pool.

[0192] One or more resource pools can be configured within an SL BWP. Among them, within each resource pool,

[0193] · In the frequency domain, the position of the starting resource block of the starting sub-channel of the resource pool within the SL BWP can be configured by the parameter startRB-Subchannel (or the parameter sl-StartRB-Subchannel-r16).

[0194] · In the frequency domain, the number of sub-channels occupied by the resource pool (denoted as ) can be configured by the parameter numSubchannel (or the parameter sl-NumSubchannel-r16). The sub-channels can be continuous in the frequency domain.

[0195] · In the frequency domain, each sub-channel can be composed of one or more resource blocks. The specific number of resource blocks (referred to as the size of the sub-channel, for example, denoted as n subChannelSize ) can be configured by the parameter subchannelsize (or the parameter sl-SubchannelSize-r16). The n subChannelSize resource blocks can be continuous in the frequency domain.

[0196] · In the frequency domain, in ascending order of frequency, the sub-channels within a resource pool can be numbered 0, 1, ……, where the sub-channel numbered i can be referred to as "sub-channel i"

[0197] · In the time domain, one or more time slots that periodically appear and can be used for the resource pool (or belong to the resource pool) can be configured by the parameter timeresourcepool (or the parameter sl-TimeResource-r16) (for example, in the form of a time slot bitmap), where the size of the period can be a predefined value, or configured by the parameter periodResourcePool (or the parameter sl-Period-r16).

[0198] The allocation methods of resources related to SL operations (such as time domain resources, frequency domain resources, and code domain resources) can be classified as follows:

[0199] · Mode 1: The base station schedules SL resources for SL transmission.

[0200] · Mode 2: The UE determines the SL resources for SL transmission (i.e., the base station does not participate in the scheduling of SL resources). For example, the UE performing SL transmission operations autonomously determines the SL resources for SL transmission.

[0201] The UE can schedule the transmission of data through SCI (Sidelink Control Information). SL operations can support "two-stage SCI", where the first-stage SCI (1 st -stage SCI) can contain information such as resource reservation and / or resource allocation, so that all UEs monitoring the SL link can detect (sensing) the resource reservation and / or resource allocation situation; the second-stage SCI (2 nd -stage SCI) can contain other information, such as information related to HARQ feedback, etc. Unless otherwise specified below, when "SCI" is mentioned alone, it can include only the first-stage SCI, only the second-stage SCI, or both the first-stage SCI and the second-stage SCI.

[0202] The format of the first-stage SCI can be SCI format 0-1 (or written as "SCI format 0_1"). The following are some examples of the information that can be contained in SCI format 0-1:

[0203] · Priority.

[0204] · Frequency resource assignment.

[0205] · Time resource assignment.

[0206] · Resource reservation period.

[0207] · DMRS pattern.

[0208] · Second-stage SCI format (2 nd -stage SCI format).

[0209] The format of the second-stage SCI can be SCI format 0-2 (or written as "SCI format 0_2"). The following are some examples of the information that can be included in SCI format 0-2:

[0210] · Source Layer-1 ID (Source Layer-1 ID, or Layer-1 Source ID, layer-1 source identifier, or Physical Layer Source ID, physical layer source identifier, or (when the context is clear) Source ID, source identifier).

[0211] · Destination Layer-1 ID (Destination Layer-1 ID, or Layer-1 Destination ID, layer-1 destination identifier, or Physical Layer Destination ID, physical layer destination identifier, or (when the context is clear) Destination ID, destination identifier).

[0212] · HARQ Process ID, or HARQ Process Number.

[0213] · New Data Indicator (NDI).

[0214] · Redundancy Version (RV).

[0215] The first-stage SCI can be carried on the PSCCH. The second-stage SCI can be multiplexed with the data to be transmitted on the PSSCH associated with (or scheduled by) the PSCCH. The PSCCH and its associated PSSCH can be multiplexed in the time domain and / or frequency domain resources allocated for SL transmission in a certain way (for example, the subchannel where the starting resource block of the PSCCH is located is the starting subchannel of its associated PSSCH. Another example is that the starting resource block of the PSCCH is the starting resource block of the starting subchannel of its associated PSSCH). Additionally, it can be considered that the first-stage SCI and / or the corresponding second-stage SCI schedules the PSSCH (or schedules the transmission of the PSSCH, or schedules the transmission of the TB carried in the PSSCH).

[0216] For a specific SL transmission that includes PSCCH and / or PSSCH, the sender can be referred to as the TX UE, and the receiver can be referred to as the RX UE. If the SL transmission is a groupcast transmission or a unicast transmission, and HARQ feedback is enabled, the PSFCH sent by the RX UE can carry feedback on the PSCCH and / or PSSCH sent by the TX UE, where the feedback can be referred to as "HARQ-ACK information". In some configurations, the HARQ-ACK information can be an affirmative acknowledgement (ACK) or a negative acknowledgement (NACK, or NAK, Negative Acknowledgement); in other configurations, the HARQ-ACK information can only include NACK.

[0217] In the time domain, the PSFCH resources can appear periodically in a resource pool. For example, the corresponding period (such as referred to as the "PSFCH period" or the "PSFCH resource period", for example denoted as for example, in units of the number of time slots) can be configured through the parameter periodPSFCHresource (or the parameter sl-PSFCH-Period-r16) (for example and and ). It can be used to indicate that there are no PSFCH resources configured in the corresponding resource pool and / or to indicate that HARQ feedback is disabled in the corresponding resource pool. For example, if a resource pool does not configure the parameters related to PSFCH (such as the parameters configured through sl-PSFCH-Config-r16) or the PSFCH period configured in the parameter sl-PSFCH-Config-r16 is 0 time slots, it means that the resource pool does not configure PSFCH resources. Optionally, if a resource pool has configured the parameter sl-PSFCH-Config-r16 and the PSFCH period configured in the parameter sl-PSFCH-Config-r16 is greater than 0 time slots, it means that the resource pool has configured PSFCH resources.

[0218] The time slots related to the PSFCH period can be "logical time slots", that is, they only include the time slots belonging to the corresponding resource pool. For example, in a certain frame, time slot 0 and time slot 5 belong to the time domain resources of a certain resource pool, while time slots 1, 2, 3, and 4 do not belong to the time domain resources of this resource pool. Then, in the said resource pool, time slot 0 and time slot 5 are two adjacent "logical time slots", for example, numbered respectively as and In this example, if sl-PSFCH-Period-r16 = 1, then PSFCH resources exist in both the time slot 0 and the time slot 5.

[0219] In the frequency domain, the PSFCH resources can be configured in an RB set (for example, a set of consecutive PRBs, or a set of partially or fully non-consecutive PRBs), for example, configured by the parameter sl-PSFCH-RB-Set.

[0220] [Embodiment 1]

[0221] The following Figure 1 is used to illustrate the method executed by the user equipment in Embodiment 1 of the present invention.

[0222] Figure 1 is a flowchart showing the method executed by the user equipment according to Embodiment 1 of the present invention.

[0223] As Figure 1 shown, in Embodiment 1 of the present invention, the steps executed by the user equipment UE include: step S101 and step S103.

[0224] Specifically, in step S101, obtain information related to the resource pool.

[0225] Among them,

[0226] · Optionally, part or all of the "information related to the resource pool" is predefined information.

[0227] · Optionally, part or all of the "information related to the resource pool" is configuration information.

[0228] · Optionally, part or all of the "information related to the resource pool" is pre-configuration information.

[0229] · Optionally, part or all of the "information related to the resource pool" is indication information.

[0230] · Optionally, the "information related to the resource pool" may include one or more of the following:

[0231] ◆ SL subcarrier spacing configuration (SCS configuration) μ. Among them,

[0232] ο Optionally, μ is the subcarrier spacing configuration configured or pre-configured for the resource pool.

[0233] ο Optionally, μ is the subcarrier spacing configuration of the SL BWP where the resource pool is located.

[0234] Optionally, μ is the subcarrier spacing configuration of the SL carrier where the SL BWP where the resource pool is located is located.

[0235] Optionally, μ is the subcarrier spacing configuration of the SL carrier where the resource pool is located.

[0236] Optionally, each value of μ corresponds to a value of the subcarrier spacing (SCS) (denoted as Δf). For example, μ = 0 corresponds to Δf = 15 kHz. Another example, μ = 1 corresponds to Δf = 30 kHz. Another example, μ = 2 corresponds to Δf = 60 kHz. Another example, μ = 3 corresponds to Δf = 120 kHz. Another example, μ = 4 corresponds to Δf = 240 kHz. Another example, for a given μ, Δf = 2 μ ·15 kHz.

[0237] ◆ Duplex mode and / or TDD configuration information. Among them,

[0238] Optionally, the duplex mode can be the duplex mode of the resource pool, or the duplex mode of the SL BWP where the resource pool is located, or the duplex mode of the SL carrier where the resource pool is located, or the duplex mode of the cell where the SL carrier where the resource pool is located is located, or the duplex mode corresponding to the SL transmission on the resource pool, or the duplex mode of the carrier where the SL transmission on the resource pool is located, or the duplex mode of the cell where the carrier where the SL transmission on the resource pool is located is located. Among them,

[0239] ◇ Optionally, the duplex mode can be "TDD". For example, the SL carrier where the resource pool is located corresponds to a non-SUL carrier of a TDD cell. Another example, the SL carrier where the SL transmission on the resource pool is located corresponds to a non-SUL carrier of a TDD cell.

[0240] ◇ Optionally, the duplex mode can be "FDD". For example, the SL carrier where the resource pool is located corresponds to a UL carrier of an FDD cell. Another example, the SL carrier where the SL transmission on the resource pool is located corresponds to a UL carrier of an FDD cell.

[0241] ◇ Optionally, the duplex mode can be "SUL". For example, the SL carrier where the resource pool is located corresponds to a SUL carrier of a TDD cell. Another example, the SL carrier where the SL transmission on the resource pool is located corresponds to a SUL carrier of a TDD cell.

[0242] Optionally, the TDD configuration information can indicate one TDD mode (referred to as "mode 1") or two TDD modes (referred to as "mode 1" and "mode 2" respectively), where,

[0243] Optionally, each TDD mode can be defined by one or more of the following:

[0244] A period (e.g., denoted as dl-UL-TransmissionPeriodicity), e.g., in milliseconds.

[0245] The number of full downlink (full DL) slots (e.g., denoted as nrofiDownlinkSlots). Herein, the "full downlink slot" refers to a slot where all symbols are downlink symbols (or a slot with only downlink symbols).

[0246] The number of downlink symbols (e.g., denoted as nrofiDownlinkSymbols).

[0247] The number of full uplink (full UL) slots (e.g., denoted as nrofUplinkSlots). Herein, the "full uplink slot" refers to a slot where all symbols are uplink symbols (or a slot with only uplink symbols).

[0248] The number of uplink symbols (e.g., denoted as nrofUplinkSymbols).

[0249] ◇Optionally, denote the period corresponding to the TDD configuration information as (e.g., in milliseconds), where the period corresponding to mode 1 is P, and the period corresponding to mode 2 (if configured) is P2, then

[0250] Optionally, if mode 1 is configured and mode 2 is not configured, then

[0251] Optionally, if mode 1 is configured and mode 2 is configured, then

[0252] ο Optionally, the TDD configuration information can be configured or pre-configured through higher layer parameters. Herein,

[0253] ◇Optionally, the TDD configuration information can be pre-configured by higher layer parameters (e.g., sl-TDD-Config-r16 in SL-PreconfigGeneral-r16 in SL-PreconfigurationNR-r16).

[0254] Optionally, the TDD configuration information may be indicated by a message transmitted on the SL link, for example, indicated by the parameter sl-TDD-Config-r16 in the Master Information Block Sidelink message. For example, the parameter sl-TDD-Config-r16 in the Master Information Block Sidelink message may indicate one or more of the following:

[0255] Mode (e.g., denoted as patterns). For example, the patterns may indicate that mode 1 is configured and mode 2 is not configured. Another example is that the patterns may indicate that mode 1 is configured and mode 2 is configured. Optionally, a special value of the patterns (e.g., 0, indicating that mode 1 is not configured and mode 2 is not configured) may indicate that the duplex mode is "FDD or SUL".

[0256] Period (e.g., denoted as periods). For example, if the patterns indicate that mode 1 is configured and mode 2 is not configured, the periods indicate the period P corresponding to mode 1; if the patterns indicate that mode 1 is configured and mode 2 is configured, the periods indicate the period P of mode 1 and the period P2 of mode 2 (for example, a part of the bits of the periods indicates the period P of mode 1, and another part of the bits indicates the period P2 of mode 2; another example is that the value of the periods jointly indicates the period P of mode 1 and the period P2 of mode 2; another example is that the periods indicate the period P of mode 1 plus the period P2 of mode 2). Optionally, a special value of the periods (e.g., 0) may indicate that the duplex mode is "FDD or SUL".

[0257] Quasi-uplink slot information (e.g., the number of quasi-uplink slots, e.g., denoted as nrofQuasiUplinkSlots). For example, if the patterns indicate that mode 1 is configured and mode 2 is not configured, the nrofQuasiUplinkSlots indicates the number of quasi-uplink slots of mode 1 (e.g., denoted as ). Another example is that if the patterns indicate that mode 1 is configured and mode 2 is configured, the nrofQuasiUplinkSlots indicates the number of quasi-uplink slots of mode 1 and the number of quasi-uplink slots of mode 2 (e.g., denoted as ), for example, a part of the bits of the nrofQuasiUplinkSlots indicates the number of quasi-uplink slots of mode 1 Another part of the bits indicates the number of quasi - uplink time slots in pattern 2 For another example, the value of the nrofQuasiUplinkSlots jointly indicates the number of quasi - uplink time slots in pattern 1 and the number of quasi - uplink time slots in pattern 2 For another example, if the patterns indicate that pattern 1 is configured and pattern 2 is configured, then the nrofQuasiUplinkSlots indicates the number of quasi - uplink time slots in pattern 1 and the number of quasi - uplink time slots in pattern 2 and their sum. Optionally, a special value of the nrofQuasiUplinkSlots (such as 0, or a value where all bits are 1) can indicate that the duplex mode is "FDD or SUL".

[0258] ◇ Optionally, the TDD configuration information can be indicated by a message transmitted on the DL link, for example, indicated by the parameter tdd - UL - DL - ConfigurationCommon in the parameter servingCellConfigCommon in the SIBl message broadcast (or transmitted in other ways) by the serving cell (such as the PCell). For example, the parameter tdd - UL - DL - ConfigurationCommon can indicate one or more of the following:

[0259] The reference sub - carrier spacing (for example, denoted as referenceSubcarrierSpacing, or μ ref )

[0260] The configuration of pattern 1 (for example, denoted as pattern1). Among them, the number of full - downlink time slots, the number of downlink symbols, the number of full - uplink time slots, and the number of uplink symbols of the pattern1 can be denoted as d slots 、d sym 、u slots and u sym respectively

[0261] The configuration of pattern 2 (for example, denoted as pattern2). Among them, the number of full - downlink time slots, the number of downlink symbols, the number of full - uplink time slots, and the number of uplink symbols of the pattern2 can be denoted as d slots，2 、d sym，2 、u slots，2 and u sym，2 respectively

[0262] Optionally, the duplex mode may be related to the TDD configuration information or to the higher-layer parameters corresponding to the TDD configuration information. Among them,

[0263] ◇ Optionally, if the higher-layer parameters corresponding to the TDD configuration information are configured, the duplex mode is "TDD" or "SUL". At this time, optionally, if it is determined that SUL is configured (for example, the parameter supplementaryUplink is configured, or the value of a parameter tddOrSUL for distinguishing between "TDD" and "SUL" corresponds to "SUL"), the duplex mode is "SUL"; otherwise, the duplex mode is "TDD".

[0264] ◇ Optionally, if the higher-layer parameters corresponding to the TDD configuration information are not configured, the duplex mode is "FDD".

[0265] ◇ Optionally, if the higher-layer parameters corresponding to the TDD configuration information are not configured, the duplex mode is "SUL".

[0266] ◇ Optionally, if the higher-layer parameters corresponding to the TDD configuration information are not configured, the duplex mode is "FDD" or "SUL". At this time, optionally, if it is determined that SUL is configured (for example, the parameter supplementaryUplink is configured, or the value of a parameter fddOrSUL for distinguishing between "FDD" and "SUL" corresponds to "SUL"), the duplex mode is "SUL"; otherwise, the duplex mode is "FDD".

[0267] ◇ Optionally, some values of the higher-layer parameters corresponding to the TDD configuration information indicate that the duplex mode is "TDD".

[0268] ◇ Optionally, some values of the higher-layer parameters corresponding to the TDD configuration information indicate that the duplex mode is "FDD".

[0269] ◇ Optionally, some values of the higher-layer parameters corresponding to the TDD configuration information indicate that the duplex mode is "SUL".

[0270] ◇ Optionally, some values of the higher-layer parameters corresponding to the TDD configuration information indicate that the duplex mode is "FDD" or "SUL".

[0271] ◇ Optionally, some values of the higher-layer parameters corresponding to the TDD configuration information indicate that the duplex mode is "TDD" or "SUL".

[0272] ◆ Time-domain resource period (denoted as For example, the unit is milliseconds). Among them,

[0273] Optionally, may be a predefined value. For example, milliseconds. Another example, milliseconds. Another example, milliseconds. Another example, milliseconds. Another example, milliseconds. Another example, milliseconds. Another example, milliseconds. Another example, milliseconds. Another example, milliseconds. Another example, milliseconds. Another example, milliseconds. Another example, milliseconds. Another example, milliseconds.

[0274] Optionally, it can be configured or pre-configured through a high-layer parameter (such as sl-Period-r16).

[0275] Optionally, wherein,

[0276] ◇ Optionally, C Period，0 is a predefined constant. For example, C Period，0 = 1, another example, C Period，0 = 2, another example, C Period，0 = 4, another example, C Period，0 = 5, another example, C Period，0 = 6, another example, C Period，0 = 8, another example, C Period，0 = 10, another example, C Period，0 = 20, another example, C Period，0 = 40, another example, C Period，0 = 60, another example, C Period，0 = 80, another example, C Period，0 = 100.

[0277] ◇ Optionally, C Period is related to μ.

[0278] ◇ Optionally, C Period can be configured or pre-configured through a high-layer parameter.

[0279] Optionally, it can be indicated by DCI or SCI.

[0280] Optionally, the time-domain resource period the set of time slot numbers within is For example, milliseconds, then the time-domain resource period The time slot number within is equal to the time slot number within a reference frame number period (10,240 milliseconds), that is, the time domain resource period The time slots within are numbered relative to time slot 0 of the radio frame corresponding to reference frame number 0 (that is, the time domain resource period The time slot 0 within is time slot 0 of the radio frame corresponding to reference frame number 0), and the time slot numbers are sequentially 0, 1,..., 10,239 in chronological order. For another example, milliseconds, and Then within each time domain resource period within a reference frame number period the time slot numbers are sequentially 0, 1,..., 159 in chronological order.

[0281] ο Optionally, the set of time slot numbers within the time domain resource period is where n is an integer, and (or ). For example, milliseconds, and Then within the first time domain resource period within a reference frame number period (10,240 milliseconds) (corresponding to n = 0), the time slot numbers are sequentially 0, 1,..., 159 in chronological order, within the second time domain resource period (corresponding to n = 1), the time slot numbers are sequentially 160, 161,..., 319, ……, within the 64th time domain resource period (corresponding to n = 63), the time slot numbers are sequentially 10,080, 10,081,..., 10,239; where the time slots within the first time domain resource period are numbered relative to time slot 0 of the radio frame corresponding to reference frame number 0 (that is, the time slot 0 within the first time domain resource period is time slot 0 of the radio frame corresponding to reference frame number 0).

[0282] ◆ Time domain resource indication. For example, the time domain resource indication can be a bitmap with a length of L bitmap (for example, denoted as ), where

[0283] ο Optionally, any one of them corresponds to a bit (the corresponding value set is {0, 1}).

[0284] ο Optionally, b0 is the most significant bit (MSB) of the bitmap, and correspondingly, is the least significant bit (LSB) of the bitmap.

[0285] ο Optionally, b0 is the least significant bit (LSB) of the bitmap, and correspondingly, is the most significant bit (MSB) of the bitmap.

[0286] Optionally, the bitmap can be configured or pre-configured by a higher layer parameter (such as sl-TimeResource-r16, or also known as sl-SlotBitmap-r16). For example, the parameter sl-TimeResource-r16 can be a bit string of length N TimeResource .

[0287] Among them,

[0288] ◇ Optionally, N TimeResource is a predefined constant. For example, N TimeResource = 160, or N TimeResource = 200, or N TimeResource = 100, or N TimeResource = 120.

[0289] ◇ Optionally, the value of N TimeResource is related to μ. For example, if μ = 0, then N TimeResource = 20, if μ = 1, then N TimeResource = 40, if μ = 2, then N TimeResource = 80, if μ = 3, then N TimeResource = 160. Or, N TimeResource = C TimeResource，0 ·2 μ , where C TimeResource，0 is a predefined constant (such as C TimeResource，0 = 10, or C TimeResource，0 = 20, or C TimeResource，0 = 40, or C TimeResource，0 = 60, or C TimeResource，0 = 80, or C TimeResource，0 = 100).

[0290] ◇ Optionally, the value of N TimeResource is related to the duplex mode. For example, if the duplex mode is "FDD" or "SUL", then N TimeResource = C TimeResource，1 , if the duplex mode is "TDD", then N TimeResource = C' TimeResource，1 , where, C TimeResource，1 is a predefined constant, C' TimeResource，1 is a predefined constant, or the value of C' TimeResource，1 is related to μ. For example, if μ = 0, then C' TimeResource，1 = 20, if μ = 1, then C' TimeResource，1 = 40, if μ = 2, then C' TimeResource，1 = 80, if μ = 3, then C' TimeResource，1= 160. For another example, C' TimeResource，1 = C' TimeResource，1，0 ·2 μ , where C' TimeResource，1，0 is a predefined constant (for example, C' TimeResource，1，0 = 10, for another example, C' TimeResource，1，0 = 20, for another example, C' TimeResource，1，0 = 40, for another example, C' TimeResource，1，0 = 60, for another example, C' TimeResource，1，0 = 80, for another example, C' TimeResource，1，0 = 100).

[0291] ◇ Optionally, for each bit corresponding to the value of the parameter sl-TimeResource-r16, from the most significant bit (MSB) to the least significant bit (LSB) in sequence are At this time, optionally, can be referred to as the L bitmap most significant bits of the parameter sl-TimeResource-r16, can be referred to as the L bitmap least significant bits of the parameter sl-TimeResource-r16.

[0292] ◇ Optionally, for each bit of the parameter sl-TimeResource-r16, from the least significant bit (LSB) to the most significant bit (MSB) in sequence are At this time, optionally, can be referred to as the L bitmap least significant bits of the parameter sl-TimeResource-r16, can be referred to as the L bitmap most significant bits of the parameter sl-TimeResource-r16.

[0293] ◆ Information related to S-SSB. For example, the time domain configuration information of S-SSB included in one or more synchronization configuration items is configured through the parameter sl-SyncConfigList-r16 (for example, the number of S-SSBs within the S-SSB period of 16 frames configured through the parameter sl-NumSSB-WithinPeriod-r16 The offset within the S-SSB period configured through the parameter s1-TimeOffsetSSB-r16 and the interval between two adjacent S-SSBs configured through the parameter sl-TimeInterval-r16 ).

[0294] In addition, in step S103, a set of time slots in the resource pool (denoted as ) is determined. Among them,

[0295] · Optionally, the "set of time slots in the resource pool" may be referred to as the "time slot pool" (slotpool) of the resource pool.

[0296] · Optionally, is the time slot number within the time domain resource period . Among them,

[0297] ◆ Optionally, they are arranged in chronological order.

[0298] ◆ Optionally, they are arranged in ascending order of time slot numbers.

[0299] ◆ Optionally,

[0300] · Optionally, the "determining the set of time slots in the resource pool" may include one or more of the following steps (combined in any order if applicable):

[0301] ◆ Determine the quasi-uplink time slots within the TDD configuration period . For example, determine which or which time slots within each TDD configuration period are quasi-uplink time slots.

[0302] Denote the number of the determined quasi-uplink time slots as

[0303] ο Optionally, this step is executed when the duplex mode is "TDD".

[0304] ο Optionally, this step is executed only when the duplex mode is "TDD".

[0305] ο Optionally, when the duplex mode is not "TDD" (for example, when the duplex mode is "FDD", or when the duplex mode is "SUL", or when the duplex mode is "FDD" or "SUL"), is a predefined constant, or a configured or pre-configured value.

[0306] ο Optionally, when the duplex mode is not "TDD" (for example, when the duplex mode is "FDD", or when the duplex mode is "SUL", or when the duplex mode is "FDD" or "SUL"), is a predefined constant, or a configured or pre-configured value.

[0307] Optionally, when the duplex mode is not "TDD" (e.g., when the duplex mode is "FDD", or when the duplex mode is "SUL", or when the duplex mode is "FDD" or "SUL"),

[0308] Optionally, when the duplex mode is "FDD", is a predefined constant, or a configured or pre-configured value.

[0309] Optionally, when the duplex mode is "FDD", is a predefined constant, or a configured or pre-configured value.

[0310] Optionally, when the duplex mode is "FDD",

[0311] Optionally, when the duplex mode is "SUL", is a predefined constant, or a configured or pre-configured value.

[0312] Optionally, when the duplex mode is "SUL", is a predefined constant, or a configured or pre-configured value.

[0313] Optionally, when the duplex mode is "SUL",

[0314] Optionally, if the patterns indicate that mode 1 is configured and mode 2 is not configured, then determine that the "quasi-uplink time slots within the TDD configuration period" are the last time slots within the period P of mode 1 indicated by the periods, where Correspondingly,

[0315] Optionally, if the patterns indicate that mode 1 is configured and mode 2 is configured, then determine that the "quasi-uplink time slots within the TDD configuration period" include the following two items:

[0316] ◇ The last time slots within the period P of mode 1 indicated by the periods.

[0317] ◇ The last time slots within the period P2 of mode 2 indicated by the periods.

[0318] Correspondingly,

[0319] Optionally, if the pattern1 is configured and the pattern2 is not configured, determine that the "quasi-uplink time slot within the TDD configuration period" is the last time slot within the period P of mode 1 indicated by the pattern1, where, within the last time slot within the period P of mode 1 indicated by the pattern1, where, the last time slot within the period P of mode 1 indicated by the pattern1, where,

[0320] ◇ Optionally,

[0321] where,

[0322] Optionally, if then N 0，1 = 1, otherwise N 0，1 = 0.

[0323] Optionally, if then N 0，1 = 1, otherwise N 0，1 = 0.

[0324] Optionally, if and then N 0，1 = 1, otherwise N 0，1 = 0.

[0325] Optionally, N 0，1 = 1.

[0326] Optionally, N 0，1 = 0.

[0327] ◇ Optionally,

[0328] ο Optionally, if the pattern1 is configured and the pattern2 is configured, determine that the "quasi-uplink time slot within the TDD configuration period" includes the following two items: within the "quasi-uplink time slot within the TDD configuration period" includes the following two items:

[0329] ◇ The last time slot within the period P of mode 1 indicated by the pattern1, where, the last time slot within the period P of mode 1 indicated by the pattern1, where,

[0330] Optionally, where,

[0331] Optionally, if then N 0，1 = 1, otherwise N 0，1 = 0.

[0332] Optionally, if then N 0，1 = 1, otherwise N 0，1 = 0.

[0333] Optionally, if and then N 0，1 = 1, otherwise N 0，1 = 0.

[0334] Optionally, N 0，1 = 1.

[0335] Optionally, N 0，1 = 0.

[0336] Optionally,

[0337] ◇ the last time slot within the period P2 of pattern 2 indicated by the said pattern2, where

[0338] Optionally, where

[0339] Optionally, if then N 0，2 = 1, otherwise N 0，2 = 0.

[0340] Optionally, if then N 0，2 = 1, otherwise N 0，2 = 0.

[0341] Optionally, if and then N 0，2 = 1, otherwise N 0，2 = 0.

[0342] Optionally, N 0，2 = 1.

[0343] Optionally, N 0，2 = 0.

[0344] Optionally,

[0345] · Determine L bitmap . Wherein,

[0346] ο Optionally, L bitmap is a predefined constant, such as L bitmap = 10, and another example is L bitmap = 20, and another example is L bitmap = 40, and another example is L bitmap = 60, and another example is L bitmap = 80, and another example is L bitmap = 100, and another example is L bitmap = 120, and another example is L bitmap = 140, and another example is L bitmap = 160.

[0347] ο Optionally, L bitmap = N TimeResource .

[0348] . Optionally, L bitmap is a configured or pre-configured value.

[0349] ο Optionally, L bitmap 's value is related to μ. For example, if μ = 0, then L bitmap = 20; if μ = 1, then L bitmap = 40; if μ = 2, then L bitmap = 80; if μ = 3, then L bitmap = 160. Another example is L bitmap = C bitmap，0 · 2 μ , where C bitmap，0 is a constant, such as C bitmap，0 = 10, and another example is C bitmap，0 = 20, and another example is C bitmap，0 = 30, and another example is C bitmap，0 = 40, and another example is C bitmap，0 = 50, and another example is C bitmap，0 = 60, and another example is C bitmap，0 = 70, and another example is C bitmap，0 = 80, and another example is C bitmap，0 = 90, and another example is C bitmap，0 = 100.

[0350] Optionally, L bitmap takes a value related to For example where

[0351] Optionally, C bitmap，1 is a constant. For example, C bitmap，1 = 1, or C bitmap，1 = 5, or C bitmap，1 = 10, or C bitmap，1 = 20.

[0352] Optionally, C bitmap，1 is a configured or pre-configured value.

[0353] Optionally, C bitmap，1 is the largest integer that satisfies .

[0354] Optionally, C bitmap，1 is the largest integer that satisfies .

[0355] Optionally, C bitmap，1 is a value related to μ. For example, if μ = 0, then C bitmap，1 = 8; if μ = 1, then C bitmap，1 = 4; if μ = 2, then C bitmap，1 = 2; if μ = 3, then C bitmap，1 = 1. Or,

[0356] Optionally, L bitmap takes a value related to For example where

[0357] Optionally, C bitmap，2 is a constant. For example, C bitmap，2 = 1, or C bitmap，2 = 2, or C bitmap，2 = 3, or C bitmap，2 = 4, or C bitmap，2 = 5, or C bitmap，2 = 6, or C bitmap，2 = 7, or C bitmap，2 = 8, or C bitmap，2 = 9, or C bitmap，2 = 10.

[0358] Optionally, C bitmap，2 is a configured or pre-configured value.

[0359] ◆ Determine the bitmap For example, are respectively equal to Another example, are respectively equal to Another example, are respectively equal to Another example, are respectively equal to Among them,

[0360] ◆ Determine the set of candidate time slots

[0361] Among them,

[0362] ο Optionally, N SLSlot，0 is the number of elements in the set S SLSlot，0 .

[0363] ο Optionally, the set S SLSlot，0 can be any one of the following:

[0364] ◇ S All -S SSSB .

[0365] ◇ S All -S NonSLSlot .

[0366] ◇ S All -S SSSBOrNonSLSlot .

[0367] ◇ S All -S SSSB -S NonSLSlot .

[0368] ◇ S All -S SSSB -S SSSBOrNonSLSlot .

[0369] Among them,

[0370] ◇ S All is the set of all time slots within the time domain resource period . Denote the number of elements in the set S All as N All (For example ).

[0371] ◇ S SSSB is the set of time slots configured with S-SSB within the time domain resource period . Denote the number of elements in the set S SSSB as N SSSB .

[0372] ◇S NonSLSlot For the time-domain resource period The set of time slots that do not meet the SL candidate time slot conditions within. Denote the set as S NonSLSlot The number of elements in the set S is N NonSLSlot 。

[0373] ◇S SSSBOrNonSLSlot For the time-domain resource period The set of time slots in which S-SSB is configured or that do not meet the SL candidate time slot conditions within. Denote the set as S SSSBOrNonSLSlot The number of elements in the set S is N SSSBOrNonSLSlot 。

[0374] ο Optionally, N SLSlot，0 Can be equal to any one of the following:

[0375] ◇N All -N SSSB 。

[0376] ◇N All -N NonSLSlot 。

[0377] ◇N All -N SSSBOrNonSLSlot 。

[0378] ◇N All -N SSSB -N NonSLSlot 。

[0379] ◇N All -N SSSB -N SSSBOrNonSLSlot 。

[0380] ο Optionally, Arrange in chronological order.

[0381] ο Optionally, Arrange in ascending order of time slot numbers.

[0382] ◆ Determine the set S of reserved slots Reserved 。Denote the set as S Reserved The number of elements in the set S is N Reserved 。Among them,

[0383] ο Optionally, N Reserved =N SLSlot，0 mod L bitmap 。

[0384] ο Optionally, if N Reserved =0, then S Reserved Is an empty set.

[0385] Optionally, if the time slot l SLSlot，0 in the set S r and / or N Reserved meets the reserved time slot condition, then the time slot l r is a reserved time slot. Wherein, the reserved time slot condition is one or more of the following (any combination of "AND" or "OR" as applicable):

[0386] ◇ where m ∈ {0, 1,..., N Reserved - 1}.

[0387] ◇ where m = 0, 1,..., N Reserved - 1.

[0388] ◇N Reserved > 0.

[0389] ◇N Reserved ≠ 0.

[0390] ◆ Determine the set of time slots before applying the bitmap

[0391] wherein,

[0392] Optionally, N SLSlot，nb is the number of elements in the set S SLSlot，nb .

[0393] Optionally, the set S SLSlot，nb can be any one of the following:

[0394] ◇S All - S SSSB - S Reserved .

[0395] ◇S All - S NonSLSlot - S Reserved .

[0396] ◇S All - S SSSBOrNonSLSlot - S Reserved .

[0397] ◇S All - S SSSB - S NonsLSlot - S Reserved .

[0398] ◇S All - S SSSB - S SSSBorNonSLSlot - S Reserved .

[0399] ◇S SLslot，0 -S Reserved 。

[0400] ◇S All -S SSSB 。

[0401] ◇S All -S NonSLSlot 。

[0402] ◇S All -S SSSBOrNonSLSlot。

[0403] ◇S All -S SSSB -S NonSLSlot 。

[0404] ◇S All -S SSSB -S SSSBOrNonSLSlot 。

[0405] ◇S SLSlot，0 。

[0406] ο Optionally, N SLSlot，nb may be equal to any one of the following:

[0407] ◇N All -N SSSB -N Reserved 。

[0408] ◇N All -N NonSLSlot -N Reserved 。

[0409] ◇N All -N SSSBOrNonSLSlot -N Reserved 。

[0410] ◇N All -N SSSB -N NonSLSlot -N Reserved 。

[0411] ◇N All -N SSSB -N SSSBOrNonSLSlot -N Reserved 。

[0412] ◇N SLSlot，0 -N Reserved 。

[0413] ο Optionally, in chronological order.

[0414] ο Optionally, Arrange in ascending order of time slot numbers.

[0415] ◆ Determine the set S of time slots after applying the bitmap SLSlot，wb (Denote the number of elements in the set S SLSlot，wb as N SLSlot，wb ). For example, perform one or more of the following (combined in any order if applicable):

[0416] ο Initialize the set S SLSlot，wb to an empty set.

[0417] ο For each k ∈ {0, 1,..., N SLSlot，nb -1}, if the time slot m SLSlot，nb in the set S k satisfies the resource pool bitmap condition one, then the time slot m k belongs to the set S SLSlot，wb (or in other words, put the time slot m k into the set S SLSlot，wb ). Among them, the resource pool bitmap condition one is one or more of the following (combined in any combination of "AND" or "OR" if applicable):

[0418] ◇ b k′ = 1, where k′ = k mod L bitmap (or written as k′ = (k mod L bitmap ))

[0419] ◇ b k′ = 0, where k′ = k mod L bitmap (or written as k′ = (k mod L bitmap ))

[0420] ο Arrange the elements in the set S SLSlot，wb in chronological order.

[0421] ο Arrange the elements in the set S SLSlot，wb in ascending order of time slot numbers.

[0422] · Determine the set S of time slots after aligning the PSFCH resources SLSlot，wp (Optionally, perform this operation only when the PSFCH resources are configured in the resource pool). For example, perform one or more of the following (combined in any order if applicable):

[0423] ο Initialize the set S SLSlot，wp to be equal to S init (Denote the number of elements in the set S init as N init ). For example, Sinit = S SLslot，wb (correspondingly, N init = N SLSlot，wb ). Also, S init = S SLSlot，nb (correspondingly, N init = N SLSlot，nb ). Also, S init = S SLSlot，0 (correspondingly, N init = N SLSlot，0 ).

[0424] ο Remove N SLSlot，wp elements from the set S removed (e.g., the last N removed elements, or the first N removed elements). Among them,

[0425] ◇ N removed is a value related to . For example,

[0426] ◆ Determine the set S RP as any one of the following:

[0427] ο S SLSlot，wp .

[0428] ο S SLSlot，wb .

[0429] ο S SLSlot，nb .

[0430] ο S SLSlot，0 .

[0431] Optionally, in the first embodiment of the present invention, "configured" can be replaced by "pre-configured".

[0432] Optionally, in the first embodiment of the present invention, "configured" can be replaced by "configured or pre-configured".

[0433] Optionally, in the first embodiment of the present invention, "not configured" can be replaced by "not pre-configured".

[0434] Optionally, in the first embodiment of the present invention, "not configured" can be replaced by "not configured and / or not pre-configured".

[0435] Optionally, in the first embodiment of the present invention, "not configured" can be replaced by "not (pre)-configured".

[0436] Optionally, in the first embodiment of the present invention, a "quasi-uplink time slot" (which can also be referred to as an "uplink time slot" when the context is clear) refers to a time slot that meets the quasi-uplink time slot conditions. Among them, for a given time slot l, the quasi-uplink time slot conditions refer to one or more of the following (any combination in the form of "AND" or "OR" when applicable):

[0437] · In the time slot l, symbol symbol ……, symbol is configured as an uplink symbol.

[0438] · In the time slot l, at least symbol symbol ……, symbol is configured as an uplink symbol.

[0439] · In the time slot l, all symbols (for example, for NCP, symbol 0, symbol 1, ……, symbol 13; for another example, for ECP, symbol 0, symbol 1, ……, symbol 11) are configured as uplink symbols.

[0440] Optionally, in the first embodiment of the present invention, for a given time slot l, the SL candidate time slot conditions refer to one or more of the following (any combination in the form of "AND" or "OR" when applicable):

[0441] · In the time slot l, symbol symbol ……, symbol is configured as a UL symbol.

[0442] · In the time slot l, at least symbol symbol ……, symbol is configured as a UL symbol.

[0443] · In the time slot l, all symbols (for example, for NCP, symbol 0, symbol 1, ……, symbol 13; for another example, for ECP, symbol 0, symbol 1, ……, symbol 11) are configured as UL symbols.

[0444] Optionally, in the first embodiment of the present invention, the uplink time slot conditions are equivalent to the SL candidate time slot conditions.

[0445] Optionally, in the first embodiment of the present invention, the SL candidate time slot conditions are equivalent to the uplink time slot conditions.

[0446] Optionally, in the first embodiment of the present invention, the period of uses other units (for example, time slots, correspondingly, can be replaced by )。

[0447] Optionally, in the first embodiment of the present invention, can be replaced by 2 μ 。

[0448] Optionally, in the first embodiment of the present invention, 2 μ can be replaced by

[0449] Optionally, in the first embodiment of the present invention, can be replaced by

[0450] Optionally, in the first embodiment of the present invention, can be replaced by

[0451] Optionally, in the first embodiment of the present invention, SLSS can be replaced by S-SSB.

[0452] Optionally, in the first embodiment of the present invention, S-SSB can be replaced by SLSS.

[0453] Optionally, in the first embodiment of the present invention, 10240 can be replaced by wherein, (milliseconds),

[0454] Optionally, in the first embodiment of the present invention, the "reference frame number" can be SFN. For example, when using the serving cell as the timing reference. Correspondingly, the "reference frame number period" is the SFN period (1024 frames, with a duration of 10240 milliseconds).

[0455] Optionally, in the first embodiment of the present invention, the "reference frame number" can be DFN. For example, when not using the serving cell as the timing reference (such as when using other UEs on the SL link as the timing reference, or using GNSS as the timing reference). Correspondingly, the "reference frame number period" is the DFN period (1024 frames, with a duration of 10240 milliseconds).

[0456] Optionally, the method for determining the quasi-uplink time slot within the TDD configuration period shown in the first embodiment of the present invention can be used to determine the "quasi-uplink time slot" information in the Master Information Block Sidelink message when sending the Master Information Block Sidelink message.

[0457] Thus, as described in the first embodiment, the present invention provides a method that enables different UEs to perform efficient SL transmission and reception based on the same resource pool by flexibly determining a set of time slots in the resource pool.

[0458] [Variant Example]

[0459] Next, use Figure 2 to illustrate a user equipment that can execute the method performed by the user equipment described in detail above of the present invention.

[0460] Figure 2 is a block diagram showing the user equipment UE related to the present invention.

[0461] As Figure 2 shown, the user equipment UE20 includes a processor 201 and a memory 202. The processor 201 may include, for example, a microprocessor, a microcontroller, an embedded processor, etc. The memory 202 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. Program instructions are stored on the memory 202. When executed by the processor 201, these instructions can execute the above method performed by the user equipment described in detail in the present invention.

[0462] The method and the related equipment of the present invention have been described above in combination with preferred embodiments. Those skilled in the art can understand that the method shown above is only exemplary, and the above-described embodiments can be combined with each other without contradiction. The method of the present invention is not limited to the steps and sequences shown above. The network nodes and user equipment shown above may include more modules, for example, may also include modules that can be developed or will be developed and can be used for base stations, MMEs, or UEs, etc. The various identifiers shown above are only exemplary and not restrictive, and the present invention is not limited to the specific information elements that are examples of these identifiers. Those skilled in the art can make many changes and modifications according to the teachings of the shown embodiments. Those skilled in the art should understand that part or all of a mathematical expression or a mathematical equation or a mathematical inequality can be simplified to a certain extent (such as combining constant terms, or exchanging two addition terms) or transformed or rewritten; the mathematical expression or the mathematical equation or the mathematical inequality before and after the simplification or transformation or rewriting can be considered equivalent.

[0463] It should be understood that the above embodiments of the present invention can be implemented by software, hardware, or a combination of both software and hardware. For example, 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), complex programmable logic devices (CPLDs), and so on.

[0464] In the present application, a "base station" may refer to a mobile communication data and control switching center with a certain transmission power and a certain coverage area, including functions such as resource allocation and scheduling, data reception and transmission, etc. A "user equipment" may refer to a user mobile terminal, for example, including terminal devices such as mobile phones, notebooks, etc. that can perform wireless communication with a base station or a micro base station.

[0465] In addition, the embodiments of the present invention 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, encoded with computer program logic on the computer-readable medium, and when executed on a computing device, the computer program logic provides related operations to implement the above technical solutions of the present invention. 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 invention. This setting of the present invention is typically provided as software, code, and / or other data structures set 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 ROMs or RAMs or PROM chips, or a downloadable software image in one or more modules, a shared database, etc. The software or firmware or such a configuration can be installed on a computing device so that one or more processors in the computing device perform the technical solutions described in the embodiments of the present invention.

[0466] In addition, each functional module or each feature of the base station device and the terminal device 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 execute each function described in this specification may include a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), or a general integrated circuit, a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic, or discrete hardware components, or any combination of the above devices. The general-purpose processor may be a microprocessor, or the processor may be an existing processor, controller, microcontroller, or state machine. The above general-purpose processor or each circuit may be configured by a digital circuit or may be configured by a logic circuit. In addition, when an advanced technology capable of replacing the current integrated circuit appears due to the progress of semiconductor technology, the present invention may also use the integrated circuit obtained by using this advanced technology.

[0467] Although the present invention has been shown above in conjunction with the preferred embodiments of the present invention, those skilled in the art will understand that various modifications, substitutions, and changes can be made to the present invention without departing from the spirit and scope of the present invention. Therefore, the present invention should not be limited by the above embodiments, but should be defined by the appended claims and their equivalents.

Claims

1. A method performed by a user equipment UE, comprising: Set the content of the message in the PSBCH of the S-SS / PSBCH block, including the number of UL time slots for sidelink in the TDD configuration indications, where The number mentioned above equals is the number of symbols in a time slot, If the condition is satisfied then N 0,1 is 1 If the said conditions are not met then N 0,1 is 0. is the sidelink start symbol index provided by the parameter sl-StartSymbol, μ ref is the reference SCS configuration provided by the parameter referenceSubcarrierSpacing of the TDD configuration μ corresponds to the SCS configuration of the sidelink, u slots is the number of time slots having only uplink symbols provided by the parameter nrofUplinkSlots of the first mode configured by the TDD, and u sym is the number of uplink symbols provided by the parameter nrofUplinkSymbols of the first mode configured by the TDD, and transmit the S-SS / PSBCH block.

2. A user equipment UE, characterized in that Comprising: a processor; and a memory storing instructions, wherein the instructions, when run by the processor, perform a method that includes: Set the content of the message in the PSBCH of the S-SS / PSBCH block, including the number of UL time slots for sidelink in the TDD configuration indication, where The number mentioned above equals is the number of symbols in a time slot, If the condition is satisfied then N 0,1 is 1 If the said conditions are not met then N 0,1 is 0, is the sidelink start symbol index provided by the parameter sl-StartSymbol, μ ref is the reference SCS configuration provided by the parameter referenceSubcarrierSpacing of the TDD configuration μ corresponds to the SCS configuration of the sidelink, u slots is the number of time slots having only uplink symbols provided by the parameter nrofUplinkSlots of the first mode configured by the TDD, and u sym is the number of uplink symbols provided by the parameter nrofUplinkSymbols of the first mode configured by the TDD, and transmit the S-SS / PSBCH block.

3. The UE according to claim 2, wherein: The UE sets that the content of the message further includes an indication of whether the first mode is configured for the TDD configuration and the second mode is not configured, or both the first mode and the second mode are configured; and wherein, if the first mode is configured and the second mode is not configured, then the number is equal to 4. The UE according to claim 2, wherein, the value of μ is one of 0, 1, 2, and 3, and the values 0, 1, 2, and 3 of μ correspond to SCSs of 15 kHz, 30 kHz, 60 kHz, and 120 kHz, respectively.

5. A user equipment UE, characterized in that Comprising: a processor; and a memory storing instructions, wherein the instructions, when run by the processor, perform a method that includes: Receive the message in the PSBCH of the S-SS / PSBCH block, including the indication of the number of UL time slots for sidelink in the TDD configuration, where of which The number mentioned equals is the number of symbols in a time slot, If the condition is satisfied then N 0,1 is 1 If the said conditions are not met then N 0,1 is 0. is the sidelink start symbol index provided by the parameter sl-StartSymbol, μ ref is the reference SCS configuration provided by the parameter referenceSubcarrierSpacing of the TDD configuration μ corresponds to the SCS configuration of the sidelink, u slots is the number of time slots having only uplink symbols provided by the parameter nrofUplinkSlots of the first mode configured by the TDD, and u sym is the number of uplink symbols provided by the parameter nrofUplinkSymbols of the first mode configured by the TDD.

6. The UE according to claim 5, wherein, The message includes an indication of whether the first mode is configured for the TDD configuration without configuring the second mode, or both the first mode and the second mode are configured; and wherein, if the first mode is configured without configuring the second mode, the number is equal to 7. The UE according to claim 5, wherein the value of μ is one of 0, 1, 2, and 3, and the values 0, 1, 2, and 3 of μ correspond to SCSs of 15 kHz, 30 kHz, 60 kHz, and 120 kHz, respectively.

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