CN114698129A

CN114698129A - Method performed by user equipment and user equipment

Info

Publication number: CN114698129A
Application number: CN202011595771.1A
Authority: CN
Inventors: 罗超; 刘仁茂; 赵毅男
Original assignee: Sharp Corp
Current assignee: Sharp Corp
Priority date: 2020-12-28
Filing date: 2020-12-28
Publication date: 2022-07-01
Also published as: WO2022143389A1

Abstract

The invention provides a method executed by user equipment and the user equipment, and the method executed by the user equipment is characterized by comprising the following steps: obtaining information related to SL resource allocation, including a resource pool set U_mode2. And, determining a resource selection mechanism m_current，1Wherein the resource selection mechanism m_current，1Is supported by the UE in the resource pool set U_mode2The highest priority resource selection mechanism of the one or more resource selection mechanisms configured in the at least one resource pool. And, determining a resource pool u_current，1Wherein the resource pool u_current，1Is in the resource pool set U_mode2Is configured with the resource selection mechanism m_current，1Any of the resource pools. And selecting a mechanism m based on said resources_current，1And the resource pool u_current，1SL resource allocation pattern 2 is performed.

Description

Method performed by user equipment and user equipment

Technical Field

The present invention relates to a method performed by a user equipment and a user equipment.

Background

In NR SL (sidelink) communications (e.g., when configured as SL resource allocation mode 2), different UEs may support different sets of resource selection mechanisms, e.g., some UEs may support only "full sensing" and "random resource selection" and some UEs may additionally support "partial sensing". On the other hand, different transmission resource pools configured in the system may enable different sets of resource selection mechanisms, for example, some transmission resource pools enable full sensing, partial sensing, and random resource selection. The UE needs to solve the problem of in what order and how to determine the resource selection mechanism and resource pool to use when performing SL resource allocation (e.g., SL resource allocation mode 2).

Prior art documents

Non-patent document

Non-patent document 1: RP-152293, New WI propofol: support for V2V services based on LTE sidelink

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

Non-patent document 3: RP-170855, New WID on New Radio Access Technology

Non-patent document 4: RP-190766, New WID on 5G V2X with NR sidelink

Non-patent document 5: RP-201385, WID vision: NR sidelink enhancement

Disclosure of Invention

In order to solve at least a part of the above problems, the present invention provides a method executed by a ue and a ue, which can perform resource allocation in a suitable resource pool according to a suitable resource selection mechanism in an SL resource allocation mode 2 by flexibly setting a rule for determining a resource selection mechanism and a resource pool, thereby improving the performance of the SL resource allocation mode 2.

According to the invention, a method performed by a user equipment is proposed, characterized by comprising: obtaining information related to SL resource allocation, wherein the information includes a resource pool set U_mode2. And, determining a resource selection mechanism m_current，1Wherein the resource selection mechanism m_current，1Is supported by the UE in the resource pool set U_mode2The highest priority resource selection mechanism of the one or more resource selection mechanisms configured in the at least one resource pool. And, doDetermine a resource pool u_current，1Wherein the resource pool u_current，1Is in the resource pool set U_mode2Is configured with the resource selection mechanism m_current，1Any of the resource pools. And selecting a mechanism m based on said resources_current，1And the resource pool u_current，1SL resource allocation pattern 2 is performed.

Preferably, if the UE is in the SL energy saving state, the resource pool set U_mode2The resource selection mechanism configured in each resource pool in the pool may include one or more of partial sensing and random resource selection.

Preferably, if the UE is in a non-SL energy saving state, the resource pool set U_mode2The resource selection mechanism configured in each resource pool in the pool may include one or more of full sensing, partial sensing, and random resource selection.

Preferably, if the UE is in the SL energy saving mode, the priority order corresponding to the priority may be partial sensing from the highest priority to the lowest priority, and random resource selection.

Preferably, if the UE is in the non-SL power saving mode, the priority order corresponding to the priority may be full sensing, partial sensing, and random resource selection from the highest priority to the lowest priority.

Preferably, the resource pool set U_mode2At least one resource pool in the resource selection mechanism set comprises full sensing.

Further, according to the present invention, there is provided a method performed by a user equipment, characterized by comprising: obtaining information related to SL resource allocation, wherein the information includes a resource pool set U_mode2. And, determining a resource pool u_current，2Wherein the resource pool u_current，2Is the resource pool set U_mode2At least comprises any one of one or more resource pools of one resource selection mechanism supported by the UE. And, determining a resource selection mechanism m_current，2Wherein said dataSource selection mechanism m_current，2Is the resource pool u_current，2And the resource selection mechanism with the highest priority supported by the UE in the corresponding resource selection mechanism set. And selecting a mechanism m based on said resources_current，2And the resource pool u_current，2SL resource allocation pattern 2 is performed.

Furthermore, according to the present invention, there is provided a user equipment comprising: a processor; and a memory storing instructions, wherein the instructions, when executed by the processor, perform the method described above.

Therefore, the present invention provides a method, which can allocate resources in the appropriate resource pool according to the appropriate resource selection mechanism in the SL resource allocation mode 2 by flexibly setting rules for determining the resource selection mechanism and the resource pool, thereby improving the performance of the SL resource allocation mode 2.

Drawings

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

fig. 1 is a flowchart illustrating a method performed by a user equipment according to a first embodiment of the present invention.

Fig. 2 is a flow chart illustrating a method performed by a user equipment according to a second embodiment of the present invention.

Fig. 3 shows a block diagram of a user equipment UE to which the present invention relates.

Detailed Description

The invention is described in detail below with reference to the figures and the detailed description. It should be noted that the present invention should not be limited to the specific embodiments described below. In addition, for the sake of brevity, detailed descriptions of well-known technologies not directly related to the present invention are omitted so as to prevent the confusion of the understanding of the present invention.

Embodiments according to the present invention are described in detail below with a 5G mobile communication system and its subsequent evolution as an example application environment. However, it is to be noted that the present invention is not limited to the following embodiments, but is applicable to more other wireless communication systems, such as a communication system after 5G and a 4G mobile communication system before 5G, and the like.

Some terms to which the present invention relates will be described below, and the terms to which the present invention relates are defined herein, unless otherwise specified. The terms given in the invention may adopt different naming manners in LTE, LTE-Advanced Pro, NR and the following communication systems, but the unified terms adopted in the invention can be replaced by the terms adopted in the corresponding systems when being applied to the specific systems.

3 GPP: 3rd Generation partnershift Project, third Generation Partnership Project

AGC: automatic Gain Control

AMF: access and Mobility Management Function

AS: access Stratum, Access Stratum

BWP: bandwidth Part, Bandwidth fragment

And (3) CP: cyclic Prefix, Cyclic Prefix

CRB: common Resource Block, Common Resource Block

CSI: channel-state Information, Channel state Information

DL: downlink, Downlink

DM-RS: demodulation reference signal (DMRS)

eNB: E-UTRAN Node B, E-UTRAN Node B

E-UTRAN: evolved UMTS Terrestrial Radio Access Network

FR 1: frequency Range 1, Frequency Range 1

FR 2: frequency Range 1, Frequency Range 2

GLONASS: global NAvigation Satellite System (GNSS)

And g NB: NR Node B, NR Node B

GNSS: global Navigation Satellite System (GNSS)

GPS: global Positioning System

HARQ: hybrid Automatic Repeat Request (HARQ)

HARQ-ACK: HARQ Acknowledgement, HARQ Acknowledgement

ID: identity, Identifier

IE: information Element, Information Element

LTE: long Term Evolution, Long Term Evolution

LTE-A: long Term Evolution-Advanced, Long Term Evolution-upgraded version

MAC: medium Access Control, Medium Access Control

MAC CE: MAC Control Element, MAC Control Element

MIB: master Information Block, Master Information Block

MIB-SL: master Information Block-Sidelink, Master Information Block-Downlink

MIB-SL-V2X: master Information Block-Sidelink-V2X, Master Information Block-go-vehicle to any entity

MIB-V2X: master Information Block-V2X, Master Information Block-vehicle to any entity

MME: mobility Management Entity

NAS: Non-Access-Stratum, Non-Access Stratum

NDI: new Data Indicator, New Data Indicator

NR: new Radio, fine generation Radio access technology, fifth generation Radio access technology

P2V: Pedestrian-to-Vehicle

P2X: pedestrian-to-eventing, Pedestrian to any entity

PBCH: physical Broadcast Channel, Physical Broadcast Channel

PDCCH: physical Downlink Control Channel, Physical Downlink Control Channel

PDCP: packet Data Convergence Protocol (PDMP)

PSBCH: physical Sidelink Broadcast Channel, Physical direct Broadcast Channel

PSCCH: physical Sidelink Control Channel, a Physical direct Control Channel

PSFCH: physical Sidelink Feedback Channel, Physical direct Feedback Channel

PSSCH: physical Sidelink Shared Channel, a Physical direct Shared Channel

PRB: physical Resource Block, Physical Resource Block

PSS: primary Synchronization Signal, Primary Synchronization Signal

PSS-SL: primary Synchronization Signal for Sidelink, Primary Synchronization Signal

PSSS: primary Sidelink Synchronization Signal, Primary direct line Synchronization Signal

QZSS: Quasi-Zenith Satellite System, Quasi-Zenith Satellite System

RB: resource Block, Resource Block

RBG: resource Block Group, Resource Block Group

RE: resource Element, Resource Element

RLC: radio Link Control, Radio Link Control protocol

RRC: radio Resource Control, Radio Resource Control

RV: redundancy Version of Reduncyny Version

S-BWP: sidelink Bandwidth Part, straight-forward Bandwidth fragment

S-MIB: sidelink Master Information Block, straight-row Master Information Block

S-PSS: sidelink Primary Synchronicaion Signal, straight-going Primary synchronization Signal

S-SSB: sidelink SS/PBCH block, inline Sync Signal/physical broadcast channel Block

S-SSS: sidelink Secondary Synchronization Signal, direct auxiliary Synchronization Signal

SCI: sidelink Control Information, straight-line Control Information

SCS: subcarrier Spacing, Subcarrier Spacing

SIB: system Information Block

SL: sidelink, straight

SL BWP: sidelink Bandwidth Part, straight-forward Bandwidth fragment

SL MIB: sidelink Master Information Block, straight-row Master Information Block

SL PSS: sidelink Primary Synchronization Signal, straight Primary Synchronization Signal

SL SS: sidelink synchronization Signal, direct line synchronization Signal

SL SSID: sidelink Synchronization Signal Identity, direct line Synchronization Signal Identity

SL SSB: sidelink SS/PBCH block, inline Sync Signal/physical broadcast channel Block

SL SSS: sidelink Secondary Synchronization Signal, direct-line Secondary Synchronization Signal

SL-SCH: sidelink Shared Channel, straight-ahead Shared Channel

SLSS: sidelink synchronization Signal, direct line synchronization Signal

SLSS ID: sidelink Synchronization Signal Identity, direct line Synchronization Signal Identity

SLSSID: sidelink Synchronization Signal Identity (or Sidelink Synchronization Signal Identity), inline Synchronization Signal Identity

And (3) SSB: SS/PBCH block, Sync Signal/physical broadcast channel Block

SSB-SL: SS/PBCH block for Sidelink, inline Sync Signal/physical broadcast channel Block

SSS: secondary Synchronization Signal, Secondary Synchronization Signal

SSS-SL: secondary Synchronization Signal for Sidelink, direct auxiliary Synchronization Signal

SSSB: sidelink SS/PBCH block, inline Sync Signal/physical broadcast channel Block

SSSS: secondary Sidelink Synchronization Signal, Secondary inline Synchronization Signal

Sub-channel: sub-channels

S-GW: serving Gateway, Serving Gateway

TB: transport Block

UE: user Equipment, User Equipment

UL: uplink, Uplink

UMTS: universal Mobile Telecommunications System, Universal Mobile communications System

UPF: user Plane Function, User Plane Function

V2I: Vehicle-to-Infrastructure, Vehicle-to-Infrastructure

V2N: vehicle-to-network, Vehicle-to-network

V2P: Vehicle-to-Pedestrian

V2V: Vehicle-to-Vehicle

V2X: vehicle-to-aircraft, Vehicle to any entity

VRB: virtual Resource Block, Virtual Resource Block

In all examples and embodiments of the invention, unless otherwise specified:

● alternatively, where applicable, "send" and "transmit" may be interchanged.

● alternatively, where applicable, a "symbol" (symbol) may refer to an OFDM symbol (OFDM symbol).

● optionally, any two of "within X", "in X", and "on X" may be interchanged where applicable (e.g., when an operation(s) is performed on a resource (s)). Wherein X may be one or more carriers (e.g., SL carriers), or one or more BWPs (e.g., SL BWPs), or one or more resource pools (e.g., resource pools or sidelink resource pools), or one or more links (e.g., UL, DL, SL, etc.), or one or more channels (e.g., pscch), or one or more subchannels, or one or more RBGs, or one or more RBs, or one or more "occasions" (opportunities, e.g., PDCCH listening occasions, pscch transmission occasions, pscch reception occasions, pscch transmission occasions, pscch reception occasions, etc.), or one or more OFDM symbols, or one or more slots, or one or more subframes, or one or more half-frames, or one or more arbitrary time and/or frequency and/or code domain and/or spatial domain resources, and so on.

● alternatively, "higher layer" may refer to one or more protocol layers or protocol sub-layers above the physical layer. E.g. the MAC layer, such as the RLC layer, such as the PDCP layer, such as the PC5RRC layer, such as the PC5-S layer, such as the RRC layer, such as the V2X layer, such as the application layer, such as the V2X application layer, etc.

● alternatively, "pre-configure" (pre-configure) may be pre-configured in a higher layer protocol. Such as presetting (e.g., per specification of a higher layer protocol) at a particular memory location in the UE, or presetting (e.g., per specification of a higher layer protocol) at a particular memory location accessible by the UE.

● alternatively, "configuration" may be in a higher layer protocol through signaling. For example configured for the UE through RRC signaling.

● alternatively, "configured" may be replaced with "pre-configured". And vice versa.

● alternatively, "configured" may be replaced with "configured or preconfigured". And vice versa.

● alternatively, "certain parameters have been configured" may be replaced with "certain parameters have been provided". And vice versa.

● alternatively, "indicate certain information by a certain parameter" may be replaced with "provide certain information by a certain parameter". And vice versa.

● alternatively, "provide some information through some parameter" may be replaced by "configure some information through some parameter". And vice versa.

● alternatively, "certain parameters have been configured" may be replaced by "certain parameters have been indicated by signaling". And vice versa.

● alternatively, "unconfigured" may be replaced with "unconfigured". And vice versa.

● alternatively, "unconfigured" may be replaced with "unconfigured and/or unconfigured". And vice versa.

● optionally, where applicable (e.g., where no ambiguity arises), the parameter X may refer to "X-r 8", or "X-r 9", or "X-r 10", or "X-r 11", or "X-r 12", or "X-r 13", or "X-r 14", or "X-r 15", or "X-r 16", or "X-r 17", or "X-r 18", or "X-r 19", or "X-r 20", etc. And vice versa. For example, "pdsch-HARQ-ACK-codebook" may be used to refer to the parameter pdsch-HARQ-ACK-codebook-r 16, where applicable. And vice versa.

● alternatively, a time-domain resource may also be referred to as a time (time) resource.

● alternatively, the frequency-domain resources may also be referred to as frequency resources.

● alternatively, a resource block may refer to a Virtual Resource Block (VRB), a Physical Resource Block (PRB), a Common Resource Block (CRB), or a resource block defined in other manners.

● alternatively, the numbering of the frequency domain resources may start from 0. For example, if the number of configured sub-channels in a resource pool is equal to

The set of sub-channels in said resource pool may be denoted by the corresponding set of sub-channel numbers as

As another example, a set of subcarriers in a resource block may be denoted as {0, 1.., 11} with a corresponding set of subcarrier numbers.

● alternatively, the numbering of the time domain resources may start with 0. For example, for 30kHz SCS, the set of slots in a subframe may be denoted as {0, 1} with the corresponding set of slot numbers.

● alternatively, "SL transport" may refer to one or more of the items given below, or any of the items:

PSSCH transmission.

PSCCH and PSCCH transmissions.

PSCCH or pscsch transmissions.

PSFCH transmission.

S-SSB transmission.

● alternatively, "PSCCH transmission" may be replaced by "PSCCH and/or PSCCH transmission" or by "PSCCH/PSCCH transmission".

In communication based on D2D (Device to Device) technology, an interface between devices (also referred to as User Equipment, UE) may be referred to as a PC5 interface, and a corresponding transmission link may be referred to as a "straight" or "sidelink" (SL) link at a physical layer to distinguish the Uplink (UL) link and the Downlink (DL) link. The communication based on the SL link may be referred to as SL communication (sidelink communication). SL links based on LTE technology may be referred to as LTE SL links. SL links based on NR technology may be referred to as NR SL links. The 5G V2X communication may be based on LTE SL as well as NR SL. Hereinafter, unless otherwise specified, "SL" refers to NR SL, "SL communication" refers to NR SL communication, "V2X communication" refers to NR SL based V2X communication.

The physical layer of the SL link may support one or more modes of transmission in one or more of an in-coverage (in-coverage), out-of-coverage (out-of-coverage) and partial-coverage (partial-coverage) scenarios, such as broadcast (broadcast) transmission, multicast (groupcast) transmission, unicast (unicast) transmission, and so on.

For FR1(Frequency Range 1), SCS (subcarrier spacing, denoted as Δ f, in kHz) corresponding to the SL link may be 15kHz (normal CP), or 30kHz (normal CP), or 60kHz (normal CP or extended CP); for FR2(Frequency Range 2), the SCS for the SL link may be 60kHz (normal CP or extended CP), or 120kHz (normal CP). Each one of which isSCS corresponds to one SCS configuration (μ), for example, Δ f 15kHz corresponds to μ 0, Δ f 30kHz corresponds to μ 1, Δ f 60kHz corresponds to μ 2, Δ f 120kHz corresponds to μ 3, and so on; as another example, for any given μ, Δ f is 2^μ● 15 kHz. μ may be the SCS configuration of the SL carrier; for example, all SL transmissions in one SL carrier use the same SCS configuration and/or the same CP. μ may be SCS configuration of SL BWP (Sidelink Bandwidth Part, straight-going Bandwidth segment, alternatively referred to as S-BWP, alternatively referred to as SBWP, alternatively referred to as SL-BWP, alternatively referred to as BWP-SL, or simply BWP); for example, all SL transmissions in one SL BWP use the same SCS configuration and/or the same CP. μ may be the SCS configuration of a resource pool (resource pool); for example, all SL transmissions in one resource pool use the same SCS configuration and/or the same CP.

Signals and channels related to SL operation may include:

● SL PSS (Primary Linear Synchronization Signal), alternatively called S-PSS, alternatively called SPSS, alternatively called SL-PSS, alternatively called PSS-SL, alternatively called PSSS (Primary Linear Synchronization Signal), etc.

● SL SSS (Single scalable Secondary Synchronization Signal), alternatively called S-SSS, alternatively called SSS (Single scalable Secondary Synchronization Signal), alternatively called SL-SSS, alternatively called SSS-SL, alternatively called SSS (Secondary scalable Synchronization Signal), alternatively called SSS (Secondary synchronous Signal), and so on.

● PSBCH (Physical Sidelink Broadcast Channel).

● PSCCH (Physical Sidelink Control Channel).

● PSSCH (Physical Sidelink Shared Channel).

● PSFCH (Physical Sidelink Feedback Channel).

The SL PSS, SL SSS and PSBCH together may be organized in block form on time/frequency resources, for example called S-SSB (Single Synchronization Signal/PSBCH block, or SSS/PSBCH block, inline Synchronization Signal/physical inline broadcast channel block), or SSS/PSBCH block, or SS/PSBCH block, or S-SS/PSBCH block, or SL SSB, or SSSB, or SL-SSB, or SSB-SL. The transmission bandwidth (e.g., 11 resource blocks) of the S-SSB may be located within a corresponding SL carrier (e.g., within one SL BWP configured within the SL carrier). The SL PSS and/or the SL SSS may carry a SL SSID (Sidelink Synchronization Identity, or Sidelink Synchronization Identifier, a straight Synchronization Identity, or Sidelink Synchronization Signal Identity, or a Physical-layer Sidelink Identity, a Physical-layer straight Identity, or a SL SSID, or a SSID-SL, or a slsid ID, or a S-SSID, etc.), and the PSBCH may carry a SL Information Block (S-MIB), or a MIB-MIB, or a mastersisbscrib, or a mastersiscrib MIB), configured by a simplex parameter, for example.

On the SL link, the time and/or frequency domain resources for transmission of the S-SSB may be configured by higher layer parameters. For example, in the frequency domain, the position of the S-SSB in the frequency domain may be configured by the parameter absoluteFrequencySSB-SL (or the parameter SL-absoluteFrequencySSB). As another example, in the time domain, one or more synchronization configuration items may be configured by a parameter SL-SyncConfigList, where in each synchronization configuration item, the synchronization configuration item may be configured by a parameter numSBwithPeriod-SL (or a parameter SL-NumSSB-WithPeriod) within an S-SSB period with a length of 16 frames

An S-SSB, wherein the number (or index) is

The index of the slot (slot) in which the S-SSB is located in a period of length 16 frames may be

Wherein

May be configured by a parameter timeOffsetSSB-SL (or parameter SL-timeOffsetSSB),

may be configured by a parameter timelntervalssb-SL (or a parameter SL-TimeInterval).

A synchronization source (synchronization source) related to SL synchronization may include a GNSS (Global navigation satellite system), a gNB, an eNB, and a UE (e.g., an NR UE, also an LTE UE, also an NR UE or an LTE UE). One UE that is the synchronization source (e.g., the UE transmitting the S-SSB) may be referred to as a SyncRefUE.

Examples of the GNSS may include GPS (Global Positioning System), GLONASS (Global NAvigation Satellite System), BeiDou (BeiDou NAvigation Satellite System), Galileo (Galileo NAvigation Satellite System), QZSS (Quasi-Zenith Satellite System), and the like.

One or more (e.g., one) SL BWPs may be configured within the SL carrier. For each SL BWP, a starting symbol that may be used for SL transmission (e.g., noting that symbol is numbered as SL-StartSymbol within a slot) may be configured by a parameter startSLsymbols (or parameter SL-StartSymbol)

) And configuring the number of symbols that can be used for SL transmission (for example, noting that the number of symbols is the number of symbols) by a parameter length slsymbols (or parameter SL-length symbols)

) Wherein said

The symbols may be consecutive symbols.

Can be recorded as

For example

Can be recorded as

For example

The "symbol that can be used for SL transmission" may be referred to as "SL symbol". Set of SL symbols (chronologically) as

Then

For example, if

The set of SL symbols is 7, 8, 9, 10, 11, 12, 13.

Only slots that satisfy certain conditions may be used for SL transmission. E.g. at least a symbol in said slot

(symbol)

… …, symbol

Is an uplink symbol (e.g., a time slot configured by tdd-UL-DL-configuration common in servingCellConfigCommon in SIB1 that satisfies the condition). As another example, the time slot must be in a set of time slots of a configured resource pool.

One or more resource pools (or SL resource pools) may be configured within a SL BWP, wherein, within each resource pool,

● in the frequency domain, the location of the starting resource block of the starting sub-channel of the resource pool within the SL BWP may be configured by a parameter startRB-Subchannel (or SL-startRB-Subchannel).

● in the frequency domain, each subchannel may be composed of one or more resource blocks, a specific number of resource blocks (called the size of the subchannel, e.g. denoted as n)_{subChannelsize}) Can be configured by a parameter subchannel size (or sl-subchannel size). N is_{subChannelsize}The resource blocks may be contiguous in the frequency domain.

● in the frequency domain, the number of sub-channels occupied by the resource pool (marked as "numsub-channel") can be configured by the parameter numsub-channel (or parameter sl-numsub-channel ")

). The described

The subchannels may be contiguous in the frequency domain.

● in frequency domain, the Number of PRBs occupied by the resource pool can be configured by the parameter sl-RB-Number (denoted as

). Alternatively, the UE may assume the stated

Last in PRB

One PRB is not used.

● in the frequency domain, the sub-channels in a resource pool can be numbered as

Wherein the subchannel numbered i may be referred to as "subchannel i"

● in the time domain, a time slot bitmap may be configured via a parameter timer _ resource (or sl _ TimeResource) to indicate which time slot or slots in a candidate time slot set belong to the resource pool. It can be seen that two consecutive slots within one resource pool may not be contiguous in time (e.g., slot 0 and slot 6 within one frame may be two consecutive slots in one resource pool). For convenience, the set of timeslots in a resource pool may be denoted as

Wherein T'_maxIs the number of slots in the set of slots.

One resource pool may be configured as a "transmission resource pool", where resources may be used for data transmission and/or reception of HARQ-ACK information in SL communication, etc.

One resource pool may also be configured as a "reception resource pool", where resources may be used for data reception and/or transmission of HARQ-ACK information in SL communication, etc.

The allocation of resources (e.g., time domain resources, such as frequency domain resources, such as code domain resources, such as spatial domain resources) related to SL operation may include:

● Mode 1(Mode 1, or Resource Allocation Mode 1, or straightforward Resource Allocation Mode 1, Sidelink Resource Allocation Mode 1): the base station schedules resources for SL transmission.

● Mode 2(Mode 2, or Resource Allocation Mode 2, or straightforward Resource Allocation Mode 2, Sidelink Resource Allocation Mode 2): the UE determines resources for SL transmission (i.e., the base station does not participate in scheduling of resources for SL transmission). For example, a UE performing a SL transmission operation autonomously determines resources for SL transmission.

The UE may schedule transmission of data through SCI (Sidelink Control Information). SL operations may support a "two-stage SCI" (two-stage SCI), where the first stage SCI (1)^stA stage SCI) may contain information of resource reservation and/or resource allocation, etc., in order to facilitate sensing (sensing) of resource reservation and/or resource allocation by all UEs monitoring (monitor) SL links; second stage SCI (2)^ndStage SCI) may contain other information, such as information related to HARQ feedback, etc. Hereinafter, when "SCI" is referred to individually, it may refer to the first-stage SCI, or the second-stage SCI, or both the first-stage SCI and the second-stage SCI, where applicable, unless otherwise specified.

The format of the first stage SCI may be SCI format 1-a (or written as "SCI format 1_ a"). The following are some examples of information that may be contained in SCI format 1-a:

● Priority (Priority).

● Frequency resource allocation (Frequency resource allocation).

● Time resource allocation (Time resource allocation).

● Resource reservation period (Resource reservation period).

● DMRS pattern (DMRS pattern).

● second stage SCI Format (2)^nd-stage SCI format)。

The format of the second-stage SCI may be SCI format 2-a (or written as "SCI format 2_ a"), or SCI format 2-B (or written as "SCI format 2_ B"). The following are some examples of information that may be contained in SCI format 2-a and/or SCI format 2-B:

● Source Layer one identifier (Source Layer-1 ID, alternatively referred to as Layer-1 Source ID, Layer one Source identifier, alternatively referred to as Physical Layer Source ID, Physical Layer Source identifier, alternatively referred to (where the context is clear) as Source ID, Source identifier).

● target Layer one identifier (Destination Layer-1 ID, alternatively referred to as Layer-1 Destination ID, Layer one target identifier, alternatively referred to as Physical Layer Destination ID, Physical Layer target identifier, alternatively referred to (where the context is clear) as Destination ID, target identifier).

● HARQ Process identification (HARQ Process ID), or HARQ Process Number (HARQ Process Number).

● New Data Identifier (NDI).

● Redundancy Version (Redunnancy Version, RV).

The first stage SCI may be carried on the PSCCH. The second stage SCI may be multiplexed on the PSCCH associated with (or scheduled to) the PSCCH with the data to be transmitted. The PSCCH and its associated PSCCH may be multiplexed in some manner on the time and/or frequency domain resources allocated for SL transmissions (e.g., the starting resource block of the PSCCH is the starting sub-channel of its associated PSCCH. In addition, the first-stage SCI and/or the corresponding second-stage SCI may be considered to schedule the PSSCH (or to schedule transmission of the PSSCH, or to schedule transmission of the TBs carried in the PSSCH).

For a SL transmission containing PSCCH and/or PSCCH, the transmitter may be referred to as TX UE and the receiver may be referred to as RX UE. If HARQ feedback is enabled, the RX UE may feed back information related to PSCCH and/or PSCCH reception (e.g., referred to as "HARQ-ACK information") through the PSFCH. For example, when an RX UE receives a psch in a resource pool and a value of a "HARQ feedback enabled/disabled indicator (HARQ feedback enabled/disabled indicator)" field in a corresponding SCI is 1, the RX UE provides HARQ-ACK information through a PSFCH transmission in the resource pool. Such HARQ-ACK information may be referred to as "HARQ-ACK information related to SL transmission reported on SL". In some configurations, HARQ-ACK information reported on a SL relating to SL transmissions may indicate a Positive Acknowledgement (ACK, Acknowledgement, or Positive Acknowledgement), e.g., indicating that data carried by the corresponding PSCCH and/or PSCCH may be decoded correctly, or a Negative Acknowledgement (NACK, or NAK), e.g., indicating that data carried by the corresponding PSCCH and/or PSCCH may not be decoded correctly; in other configurations, HARQ-ACK information reported on the SL related to SL transmission may indicate only a NACK (e.g., no HARQ feedback is sent when data carried by the corresponding PSCCH and/or PSCCH can be correctly decoded; a NACK is sent when data carried by the corresponding PSCCH and/or PSCCH cannot be correctly decoded). "ACK" and "NACK" may be referred to as HARQ-ACK value.

In the time domain, the PSFCH resource may occur periodically in a resource pool, such as a corresponding period (e.g., referred to as a "PSFCH period" or a "PSFCH resource period," e.g., noted as "PSFCH period")

E.g., in number of slots) may be configured, e.g., as a function of parameter Period psfchreresource (or parameter sl-PSFCH-Period)

Or

Or

Or

). Wherein,

may be used to indicate that no PSFCH resources are configured in the corresponding resource pool. For example, if a resource pool is not configured with a PSFCH related parameter (e.g., parameter sl-PSFCH-Config, or one or more of the parameters sl-PSFCH-Config), or a PSFCH period configured in the parameter sl-PSFCH-Config is 0, it indicates that the resource pool is not configured with a PSFCH resource. For another example, if a resource pool has configured the parameter sl-PSFCH-Config and the value of the PSFCH period configured in the parameter sl-PSFCH-Config is not 0, it indicates that the resource pool has configured the PSFCH resource.

One slot in which the PSFCH resources are configured may be referred to as a "PSFCH slot. Within a PSFCH slot, the symbols associated with PSFCH transmission may be the last SL symbol or symbols of the slot, e.g., for PSFCH Format 0, the last three SL symbols (e.g., symbols)

(symbol)

And symbols

). Wherein, the symbol

Can be used for AGC and, in addition, the content transmitted on the symbol can be copied from the symbol

Content transmitted over); symbol

May be used for PSFCH transmission; symbol

May be used as a GAP symbol, or a GUARD (GUARD) symbol. Other SL symbols of one PSFCH slot may be used to transmit other SL signals/channels, such as PSCCH, etc.

In SL resource allocation mode 2, the allocated SL resources may be determined using one or more ways. For example, a set of "available resources" (or "free resources") may be determined in different manners, and then one or more SL resources may be selected (e.g., randomly selected) from the set of "available resources" (or "free resources") for SL transmission. In the embodiments and implementations of the present invention, the manner of determining the set of "available resources" may be referred to as "resource selection mechanism" (resource selection mechanism), or "resource selection method" (resource selection method), or "resource selection scheme" (resource selection scheme), or "resource determination mechanism" (resource determination mechanism), or "resource determination method" (resource determination method), or "resource determination scheme" (resource determination scheme), or "resource allocation mechanism" (resource allocation mechanism), or "resource allocation method" (resource allocation method), or "resource allocation scheme" (resource allocation scheme), or "prefix" SL "(e.g.," SL resource selection mechanism "), or the like. Alternatively, the set of all operations that determine the allocated SL resources is referred to as the "resource selection mechanism". Alternatively, the set of partial operations that determine the allocated SL resources is referred to as the "resource selection mechanism".

If a certain resource selection mechanism is used in the SL resource allocation mode 2, it may be referred to as performing the SL resource allocation mode 2 based on the resource selection mechanism.

The operation corresponding to the SL resource allocation mode 2 may include requesting, by a higher layer protocol entity (e.g., a MAC layer protocol entity) from a physical layer protocol entity in time slot n, a set of input parameters (e.g., denoted as P)_A) A subset of resources (e.g., denoted S) from which resources may be selected is determined_A) And from the physical layer protocol entity to the higher layer protocol entity(e.g., MAC layer protocol entity) reporting the subset of resources S_A。

The input parameter set P_AOne or more of the following may be included:

● resource pool for resource selection (e.g., denoted as u_sel). For example, the resource subset S_AMay be the resource pool u_selA subset of a set of candidate resources.

● priority (e.g., layer one priority, or physical layer priority, e.g., prio_TX)。

● remaining packet delay budget (remaining packet delay budget).

● size of resource. For example, the "size of resource" may include the number of subchannels occupied by each resource (e.g. the number of consecutive subchannels), for example, denoted as L_subCH. For another example, the "size of the resource" may include the number of time slots occupied by each resource (e.g., the number of consecutive time slots), for example, denoted as L_slot. Alternatively, L_subCHAnd/or L_slotMay be a predefined or configured or preconfigured value, e.g. L_slot1 (in this case, the resource may be referred to as a single-slot resource).

● resource reservation interval (resource reservation interval), for example, denoted as P_{rsvp_TX}。

● A set of resources for re-evaluation (re-evaluation) operations, e.g. denoted as (r)₀，r₁，r₂，...)。

● A set of resources for preemption (pre-preemption) operations, e.g., (r'₀，r′₁，r′₂，...)。

To determine said subset of resources S_AThe set S can be_AInitialisation to a set of all candidate resources (denoted S, for example)_all) Then from the set S_ARemoving unusable resources and obtaining the final set S_AI.e. the requested subset of resources.

Said "all candidatesSet of resource components S_all"may be a time interval [ n + T ]₁，n+T₂]Within the resource pool u_selAll of_subCHSub-channels and L_slotA set of resources for a time slot, or a subset of the set (e.g. containing only resources in time slots available for transmission of PSCCH and/or PSCCH; e.g. if the pool of resources u is a pool of resources u)_selIf there is no corresponding PSSCH DMRS pattern in the SL symbol set configured in a certain timeslot, the timeslot cannot be used for transmitting PSCCH and/or PSCCH). Wherein, T₁And T₂May be two values determined by the UE that satisfy a certain condition, e.g., T₁May be related to the processing capability of the UE, T₂May be related to the remaining packet delay budget.

For a UE that is or will perform SL resource allocation mode 2, the slave set S_AThe "unavailable resource" removed in (a) may include one or more of the following:

● are unable to make SL transmissions on them due to the transmission capabilities limitations of the UE. For example, due to a limitation of the number of simultaneous transmissions supported by the UE, the UE may not be able to transmit on the set S when transmitting on other carriers_AAnd carrying out SL transmission on the corresponding SL carrier. As another example, the set S may not be mapped in SL carriers when the UE transmits on other carriers due to limitations of carrier combinations supported by the UE_AAnd carrying out SL transmission on the corresponding SL carrier. As another example, due to tuning into the SL carrier corresponding to the set S_AThe requirement for time required for a certain resource exceeds the capability of the UE and results in the UE being unable to make SL transmissions on that resource.

● the UE identifies an unavailable resource through a sensing operation. For example, by listening (monitor) or detecting (detect) or receiving (receive) resource reservation information (e.g., from other UEs) transmitted on the SL link (e.g., from other UEs), and then determining the set of resources that have been reserved and/or the set of resources that cannot be determined whether they have been reserved and/or may result in collisions and/or the set of resources that have been allocated and/or the set of resources that are not available for allocation, etc.

● other UEs or base stations. For example, other UEs may monitor or detect or receive resource reservation information (e.g., resource reservation information in SCI) transmitted on the SL link, so as to determine the reserved resource set and/or the resource set that cannot be determined whether the reserved resource set and/or the resource set that may cause a conflict and/or the resource set that has been allocated and/or the resource set that is unavailable for allocation and/or the resource set that is not preferentially allocated, and so on. Other UEs may indicate information about these resources to the UE through signaling carried in SL transmissions.

The operation corresponding to SL resource allocation mode 2 may comprise, from said resource subset S_AFor example, PSCCH/PSCCH transmissions (e.g., PSCCH transmissions, such as PSCCH transmissions multiplexed with PSCCH transmissions in the same resource).

The operation corresponding to SL resource allocation mode 2 may comprise, from said resource subset S_ATo select resources for multiple PSCCH/PSCCH transmissions.

The operation corresponding to SL resource allocation mode 2 may comprise, from said resource subset S_AFor one transport block, e.g. from the resource subset S_ATo select the resources required for the initial transmission and each retransmission of the transport block.

The operation corresponding to SL resource allocation mode 2 may comprise, from said resource subset S_AFor a plurality of transport blocks, e.g. from the subset of resources S_ATo select the resources required for the initial transmission and each retransmission of each of the plurality of transport blocks. In SL resource allocation mode 2, in the S from the resource subset_AIn selecting resources, a "random selection" may be used, e.g. in an equiprobable manner from the subset of resources S_ATo select one resource.

If a resource selection mechanismIdentifying an unavailable resource through a sensing operation, the resource selection mechanism may be considered a "sensing-based resource selection mechanism". Therein, the sensing operation may be "full sensing" (or simply "sensing"), e.g., the UE must listen to a sensing window (e.g., a time interval)

Corresponding time window) to (or may belong to) the resource pool u_selAll slots except those slots that cannot be listened to due to the UE's capability limitations (e.g., those slots that cannot be listened to when performing SL transmissions due to half-duplex limitations) and/or some special slots (e.g., slots that cannot be used for transmitting PSCCH and/or pscsch); wherein, T₀May be configured by a higher layer parameter (e.g. parameter sl-SensingWindow),

may be related to the processing capabilities of the UE. The corresponding resource selection mechanism may be referred to as a "full sensing-based resource selection mechanism", or a "full sensing-based resource selection", or simply as a "full sensing", or simply as a "sensing-based resource selection mechanism", or a "sensing-based resource selection", or simply as a "sensing", without causing confusion.

The sensing operation may also be "partial sensing" (e.g., the UE only needs to listen to (or may belong to) the resource pool u within the sensing window_selA partial time slot (e.g., a partial time slot that occurs periodically). The corresponding resource selection mechanism may be referred to as a "partial sensing based resource selection mechanism", or "partial sensing based resource selection", or simply "partial sensing".

If a resource selection mechanism does not involve (or perform) a sensing operation, the resource selection mechanism may be considered a "non-sensing based resource selection mechanism". For example, the set S_AMay be equal to said "all candidatesSet of resource components S_all"or equal to the set S consisting of all candidate resources in said" section_all"a set excluding some special resources. Wherein the special resource may include one or more of the following:

● are not available for use in transmitting the resources in the slot of the PSCCH/PSCCH.

● are unable to make SL transmissions on them due to the transmission capabilities limitations of the UE.

● other UEs or base stations.

The corresponding resource selection mechanism may be referred to as "random resource selection", or simply "random selection", or "random non-sensing based random resource selection".

Additionally, there may also be "random resource selection based on sensing". For example, in a sensing-based resource selection mechanism, if the sensing result cannot be applied for some reason, or only part of the sensing result is applied, it may be considered as "sensing-based random resource selection".

Different UEs may support different sets of resource selection mechanisms. For example, all UEs support "random resource selection". As another example, some UEs only support "full sensing" and "random resource selection. As another example, some UEs support only "partial sensing" and "random resource selection. As another example, some UEs support "full sensing", "partial sensing", and "random resource selection". The set of resource selection mechanisms supported by the UE may be denoted as M_cap。

In various SL resource selection mechanisms, "full sensing" may be considered to consume a relatively large amount of electricity (or energy) and be relatively suitable for UEs that are not sensitive to energy consumption (e.g., UEs installed in an automobile in V2V communication), while "partial sensing", "random resource selection", etc. may be considered to consume a relatively small amount of energy and be relatively suitable for UEs that are sensitive to energy consumption and/or communication scenarios that are sensitive to energy consumption (e.g., handheld devices corresponding to "Pedestrian" in V2P communication). On the other hand, "random resource selection" may be used as a fallback mechanism for exception handling or other resource selection mechanisms (e.g., "full sensing") (e.g., in V2V communication, fallback from "full sensing" to "random resource selection" may be performed when no sensing result is available temporarily), so "random resource selection" may also be applied to UEs that are insensitive to energy consumption. Of course, the SL resource selection mechanisms such as "partial sensing", "random resource selection", etc. have the disadvantage of increasing the probability of collision of resources selected by different UEs.

SL resource selection mechanisms such as "partial sensing", "random resource selection", etc. may be applied to SL communications as part of the "SL power saving" feature. For example, "partial sensing" may be used only if "SL power save" is enabled (or turned on or configured), and so on.

In the case of enabling "SL power saving", the UE may be in one of a plurality of states (e.g., referred to as SL state, or SL mode, or SL communication mode, etc.) related to "SL power saving", such as:

● first SL state. For example, the first SL state may be an "SL non-power saving state", e.g., a UE in this SL state is not sensitive to power (or energy) consumption, and accordingly, the resource selection mechanism used does not need to take power (or energy) consumption into particular consideration. The first SL state may also be referred to as "first SL mode", or "first SL communication mode", and so on. The SL non-energy saving state may also be referred to as "SL non-energy saving mode", or "SL non-energy saving communication mode", or the like. An example of the SL non-energy-saving communication scheme may be some specific V2X communication scheme (e.g., V2V).

● second SL state. The second SL state may be an "SL power saving state", for example, a UE in this SL state is sensitive or very sensitive to power (or energy) consumption, and accordingly, the resource selection mechanism used needs to take into account power (or energy) consumption, for example, to avoid or reduce the use of a resource selection mechanism with high power consumption. The second SL state may also be referred to as "second SL mode", or "second SL communication mode", and so on. The SL power saving state may also be referred to as "SL power saving mode", or "SL power saving communication mode", or the like. An example of an SL power-saving communication scheme may be some specific V2X communication scheme (e.g., V2P). Another example of the SL power saving communication scheme may be a SL communication scheme for public safety.

The "SL power save" may be enabled (or "on", or "configured") or disabled (or "off") by a higher layer protocol parameter (e.g., called SL-powerSavingConfig). For example, if the parameter SL-powerSavingConfig is not present (or not configured), it indicates that "SL power save" is not enabled or is disabled. As another example, if the parameter SL-powerSavingConfig is present (or configured), it indicates that "SL power saving" is enabled. For another example, if the parameter SL-powerSavingConfig (or a parameter in the information element corresponding to the parameter SL-powerSavingConfig) takes a predefined value (e.g., "disabled", "false", etc.), it indicates that "SL power saving" is not enabled or is disabled. For another example, if the parameter SL-powerSavingConfig (or a certain parameter in the information element corresponding to the parameter SL-powerSavingConfig) takes a predefined value (e.g., "enabled", "true", etc.), it indicates that "SL power saving" is enabled.

If "SL power save" is not enabled, the UE may be considered to be always in the first SL state.

Set M of resource selection mechanisms supported by UE_capMay be related to the SL state the UE is in. For example, if the UE is in the first SL state, the set M_capIs equal to the set M_cap，1(ii) a For another example, if the UE is in the second SL state, the set M is set_capIs equal to the set M_cap，2. Wherein, optionally, the set M_cap，1And said set M_cap，2May be the same or different. For example, the set M_cap，1Is { full sensing }; as another example, the set M_cap，1Is { full sensing, random resource selection }; as another example, the set M_cap，1Is { full sensing, partial sensing, random resource selection }; as another example, the set M_cap，2May be { random resource selection }; as another example, the set M_cap，2May be { partial sensing, random resourceAnd (4) selecting.

[ example one ]

A method performed by a user equipment according to a first embodiment of the present invention is described below with reference to fig. 1.

As shown in fig. 1, in a first embodiment of the present invention, a user equipment UE performs steps including: some or all of step S101, step S103, step S105, and step S107.

Specifically, optionally, in step S101, information related to SL resource allocation is acquired.

Optionally, some or all of the "SL resource allocation related information" is predefined information.

Optionally, some or all of the "information related to SL resource allocation" is information configured in a higher layer protocol.

Optionally, some or all of the "SL resource allocation related information" is information preconfigured in a higher layer protocol.

Alternatively, some or all of the "SL resource allocation related information" is information for resource allocation pattern 2.

Optionally, the "information related to SL resource allocation" may include a resource pool set (e.g. denoted as U)_mode2) The information of (1).

Optionally, the resource pool set U_mode2Is a predefined set.

Optionally, the resource pool set U_mode2Is a set configured in a higher layer protocol.

Optionally, the resource pool set U_mode2Is a set pre-configured in a higher layer protocol.

Optionally, the resource pool set U_mode2The resource pool in (2) is a transmission resource pool.

Optionally, the resource pool set U_mode2Is a collection of partial or full resource pools for resource allocation pattern 2.

Optionally, the resource pool set U_mode2May be configured or preconfigured with one or more higher layer protocol parameters. For example, the resource pool set U_mode2Configured by the parameter sl-txport selectednormal-r 16. As another example, the resource pool set U_mode2Configured by parameter sl-txplooceptive-r 16. As another example, the resource pool set U_mode2Is jointly configured by parameter sl-TxPolSelectdMoral-r 16 and parameter sl-TxPolExceptional-r 16.

Optionally, the resource pool set U_mode2Part of the resource pools in (1) constitute a set U_{mode2，legacy}The rest resource pools form a set U_mode2，new. For example, the set U_{mode2，legacy}Configured by a parameter sl-TxPolSelectdFormal-r 16, the set U_mode2，newConfigured by the parameters sl-TxPholcoholSelectdFormal 2-r 17. As another example, the set U_{mode2，legacy}Configured by a parameter sl-TxPolExceptional-r 16, the set U_mode2，newMay be configured by parameters sl-txplooceptive 2-r 17.

Optionally, the resource pool set U_mode2Each resource pool in (b) corresponds to a set of resource selection mechanisms including one or more enabled or allowed resource selection mechanisms in the resource pool. For example, the resource pool set U_mode2The ith resource pool in (e.g., denoted as u)_mode2，i) Set of corresponding resource selection mechanisms M_i(ii) a Wherein,

wherein

Is the resource pool set U_mode2The number of resource selection mechanisms in (2).

Alternatively to intervals

The value of one or more (e.g., all) of i, the set of resource selection mechanisms M_iMay be an empty set, i.e. not containing any resource selection mechanism therein.

Alternatively to intervals

The value of one or more (e.g., all) of i, the set of resource selection mechanisms M_iMay comprise one or more of the following:

● full sensing.

● are partially sensed.

● random resource selection.

● are selected based on the sensed random resource.

● are not based on sensed random resource selection.

Alternatively to intervals

The value of one or more (e.g., all) i in the resource pool u_mode2，iWherein only the corresponding resource selection mechanism set M can be used_iThe resource selection mechanism contained in (1).

Alternatively to intervals

The value of one or more (e.g., all) i in the resource pool u_mode2，iCannot use the corresponding resource selection mechanism set M_iA resource selection mechanism not included in (1).

Alternatively to intervals

The value of one or more (e.g., all) i in the resource pool u_mode2，iMay determine the corresponding set of resource selection mechanisms M in one or more of the following ways_i：

● resource selection mechanism set M_iIs a predefined set. Optionally, the predefined set is related to i.

● resource selection mechanism set M_iIs a set configured in a higher layer protocol. Optionally, the set configured in the higher layer protocol is related to i.

● resource selection mechanism set M_iIs a set pre-configured in a higher layer protocol. Optionally, the pre-configuration in the higher layer protocol is related to i.

● configure or pre-configure the set of resource selection mechanisms M by a higher layer protocol parameter (e.g., called sl-resource SelectionConfig)_i. Optionally, the parameter sl-resourceSelectionConfig is related to i, i.e. different values of i may correspond to different parameters sl-resourceSelectionConfig. For example, note the resource pool u_mode2，iThe resource selection mechanism set configured by the corresponding parameter sl-resourceSelectionConfig is M_config，i。

● resource selection mechanism set M_iMay be associated with a predefined or configured or preconfigured set of minimum resource selection mechanisms (e.g. denoted as M)_min) It is related. E.g. M_minE.g., M, { fully sensed }, again_min{ random resource selection }, again, as M_min{ full sensing, random resource selection }, also as M_min{ full sensing, random resource selection based on sensing }, again as M_min{ full sensing, not based on random resource selection for sensing }, again as M_minIs an empty set.

For example, M_i＝M_config，i。

As another example, M_iIs M_config，iAnd said minimum resource selection mechanism M_minA function of (e.g. M)_iIs equal to M_config，iAnd M_minUnion of (d). For example, if M_min{ random resource selection }, and M_iIs equal to M_config，iAnd M_minThe union of (1), then the resource pool u_mode2，iAlways allowing the use of random resource selection.

As another example, if the resource pool u_mode2，iThe corresponding parameter sl-resourceSelectionConfig is not present (or not configured), then M_i＝M_min. At this time, M can be considered_config，iIs oneAnd (4) empty collection.

As another example, if the resource pool u_mode2，iIf the corresponding parameter sl-resourceselectionConfig is not configured with any resource selection mechanism, M_i＝M_min. At this time, M can be considered_config，iIs an empty set.

Optionally, the minimum resource selection mechanism set M_minMay be related to the SL state the UE is in. For example, the "information on SL resource allocation" may include sets M corresponding to different SL states_min(ii) a For example, if the UE is in the first SL state, the set M_minEqual to the first set of minimum resource selection mechanisms M_min，1(ii) a In another example, if the UE is in the second SL state, the set M is set to the second SL state_minEqual to the second set of minimum resource selection mechanisms M_min，2. Wherein, optionally, the first set of minimum resource selection mechanisms M_min，1And said second set of minimum resource selection mechanisms M_min，2May be the same or different. For example, the first set of minimum resource selection mechanisms M_min，1Is { full sensing }; in another example, the first set of minimum resource selection mechanisms M_min，1Is { random resource selection }; in another example, the first set of minimum resource selection mechanisms M_min，1Is { full sensing, random resource selection }; in another example, the first set of minimum resource selection mechanisms M_min，1Is { full sensing, random resource selection based on sensing }; in another example, the first set of minimum resource selection mechanisms M_min，1Is { full sensing, not based on random resource selection for sensing }; in another example, the second set of minimum resource selection mechanisms M_min，2May be { full sensing }; in another example, the second set of minimum resource selection mechanisms M_min，2May be { random resource selection }; in another example, the second set of minimum resource selection mechanisms M_min，2May be { full sensing, random resource selection }; in another example, the second set of minimum resource selection mechanisms M_min，2May be { partial sensing, random resource selection }; in another example, the second set of minimum resource selection mechanisms M_min，2May be { partial sensingRandom resource selection based on sensing }; in another example, the second set of minimum resource selection mechanisms M_min，2May be { partial sensing, not based on random resource selection for sensing }.

Optionally, the resource pool set U_mode2The resource selection mechanism set corresponding to at least one resource pool comprises full sensing and/or partial sensing and/or random resource selection based on sensing and/or random resource selection not based on sensing.

Optionally, the resource pool set U_{mode2，legacy}The resource selection mechanism set corresponding to at least one resource pool comprises full sensing and/or partial sensing and/or random resource selection based on sensing and/or random resource selection not based on sensing.

Optionally, the resource pool set U_mode2，newThe resource selection mechanism set corresponding to at least one resource pool comprises full sensing and/or partial sensing and/or random resource selection based on sensing and/or random resource selection not based on sensing.

Optionally, the resource pool set U_mode2A partial resource pool (e.g., the resource pool set U)_{mode2，legacy}Resource pool in (e.g., the resource pool set U) determines the corresponding set of resource selection mechanisms in a manner that the remaining resource pools (e.g., the resource pool set U)_mode2，newResource pool in) another way to determine the corresponding set of resource selection mechanisms.

Optionally, the resource pool set U_mode2More than one resource pool in the pool corresponds to the same parameter sl-resourceSelectionConfig. For example, the parameter sl-resourceSelectionConfig is configured or preconfigured in one of the following ways:

● the resource pool set U_mode2All resource pools in (a) correspond to the same parameter sl-resourceSelectionConfig.

● the resource pool set U_mode2Partial resource pool in (e.g.)As the resource pool set U_{mode2，legacy}Resource pool in (b) corresponds to a parameter sl-resourceSelectionConfig (in this case, the parameter sl-resourceSelectionConfig may be regarded as sl-resourceSelectionConfig-1, and accordingly, for this part of resource pool, "parameter sl-resourceSelectionConfig" refers to parameter sl-resourceSelectionConfig-1), and the rest of resource pool (for example, the resource pool set U) is provided_mode2，newResource pool in (b) corresponds to another parameter sl-resourceSelectionConfig (in this case, the parameter sl-resourceSelectionConfig may be referred to as sl-resourceSelectionConfig-2, and accordingly, for this part of the resource pool, "parameter sl-resourceSelectionConfig" refers to parameter sl-resourceSelectionConfig-2).

● the resource pool set U_mode2All elements in (1) are divided into

Group (wherein

May be a predefined or configured or preconfigured value), each group corresponding to a subset of the resource pool (e.g. denoted separately as

) Each resource pool subset corresponds to a parameter sl-resourceSelectionConfig. For example, for resource pool subset U_mode2，j，

The parameter sl-resourceSelectionConfig may be recorded as sl-resourceSelectionConfig-j, and accordingly, for the resource pool subset U_mode2，j"parameter sl-resourceSelectionConfig" refers to parameter sl-resourceSelectionConfig-j).

Alternatively, if for intervals

Value of a certain i in the resource pool u_mode2，iNot corresponding to any resource selection mechanism (i.e. the set Mi is an empty set), then in the resource pool u_mode2，iIs not applicable (e.g., this means the resource pool u)_mode2，iResource allocation using the resource allocation mode 2 is not supported, and accordingly, if the UE is configured to perform resource allocation using the resource allocation mode 2, the resource pool u cannot be selected_mode2，i)。

Optionally, the "information related to SL resource allocation" may comprise a complete set of resource selection mechanisms (e.g., denoted as M)_all). For example, the resource selection mechanism corpus M_allMay comprise one or more of the following:

● full sensing.

● are partially sensed.

● random resource selection.

● are selected based on the sensed random resource.

● are not based on sensed random resource selection.

Optionally, the resource selection mechanism corpus M_allMay be related to the SL state the UE is in. For example, the "information on SL resource allocation" may include a resource selection mechanism set M corresponding to different SL states_all(ii) a For example, if the UE is in the first SL state, the full set of resource selection mechanisms M_allIs equal to the first resource selection mechanism corpus (e.g., denoted as M)_all，1) (ii) a For another example, if the UE is in the second SL state, the complete set of resource selection mechanisms M_allEqual to the second resource selection mechanism corpus (e.g., denoted as M)_all，2). Wherein, optionally, the first resource selection mechanism corpus M_all，1And said second resource selection mechanism corpus M_all，2May be the same or different. For example, the first resource selection mechanism corpus M_all，1Is { full sensing, partial sensing, random resource selection }; as another example, the first resource selection mechanism corpus M_all，1Is { allSensing, partial sensing, random resource selection based on sensing, random resource selection not based on sensing }; as another example, the second resource selection mechanism corpus M_all，2May be { partial sensing, random resource selection }; as another example, the second resource selection mechanism corpus M_all，2May be { partial sensing, random resource selection based on sensing }; as another example, the second resource selection mechanism corpus M_all，2May be { partial sensing, not based on random resource selection for sensing }.

Optionally, the "information related to SL resource allocation" may comprise a resource selection mechanism priority order (e.g., noted as

Wherein

Is the "resource selection mechanism priority order"

The priority order may be a decreasing order of priority from left to right or an increasing order of priority from left to right). For example, the resource selection mechanism priority order

May be one of the following:

● full sense, partial sense, random resource selection.

● full sense, random resource selection, partial sense.

● partial sensing, random resource selection, full sensing.

● partial sensing, full sensing, random resource selection.

● random resource selection, partial sensing, full sensing.

● random resource selection, full sensing, partial sensing.

● partial sensing, random resource selection.

● random resource selection, partial sensing.

● full sensing, random resource selection.

● random resource selection, full sensing.

● full sense, partial sense.

● partial sensing, full sensing.

● full sense, partial sense, random resource selection based on sensing, and no random resource selection based on sensing.

● full sense, partial sense, not based on sensed random resource selection, based on sensed random resource selection.

● full sense, random resource selection based on sensing, partial sense, random resource selection not based on sensing.

● are fully sensed, randomly selected based on sensing, and not randomly selected based on sensing, partially sensed.

● are fully sensed, not based on sensed random resource selection, partially sensed based on sensed random resource selection.

● are fully sensed, not selected based on sensed random resources, partially sensed, selected based on sensed random resources.

● partial sensing, full sensing, random resource selection based on sensing, and random resource selection not based on sensing.

● partial sensing, full sensing, not based on sensed random resource selection, based on sensed random resource selection.

● partially sense, based on sensed random resource selection, fully sense, not based on sensed random resource selection.

● sense partially, select based on sensed random resources, not select based on sensed random resources, sense fully.

● partial sensing, not based on sensed random resource selection, full sensing, based on sensed random resource selection.

● partial sensing, not based on sensed random resource selection, full sensing.

● are selected based on random resources sensed, fully sensed, partially sensed, not selected based on random resources sensed.

● are selected based on the sensed random resource, fully sensed, not selected based on the sensed random resource, partially sensed.

● are selected based on random resources sensed, partially sensed, fully sensed, not selected based on random resources sensed.

● are selected based on the sensed random resource, partially sensed, not selected based on the sensed random resource, fully sensed.

● are selected based on the sensed random resource and not selected based on the sensed random resource, fully sensed, partially sensed.

● random resource selection based on sensing, partial sensing, full sensing not based on random resource selection sensed.

● are not based on sensed random resource selection, full sensing, partial sensing, based on sensed random resource selection.

● are not based on sensed random resource selection, full sensing, based on sensed random resource selection, partial sensing.

● are not selected based on sensed random resources, partially sensed, fully sensed, selected based on sensed random resources.

● are not based on sensed random resource selection, partial sensing, based on sensed random resource selection, full sensing.

● are not based on sensed random resource selection, full sensing, partial sensing.

● not based on sensed random resource selection, partial sensing, full sensing.

● are partially sensed, selected based on the sensed random resources and not selected based on the sensed random resources.

● are partially sensed, not based on sensed random resource selection, based on sensed random resource selection.

● are based on the sensed random resource selection and not based on the sensed random resource selection.

● are selected based on the sensed random resource, partially sensed, and not selected based on the sensed random resource.

● are not based on sensed random resource selection, are partially sensed.

● are not based on sensed random resource selection, are partially sensed, and are based on sensed random resource selection.

Optionally, the "resource selection mechanism priority order"

May be related to the SL state the UE is in. For example, the "information on SL resource allocation" may include resource selection mechanism priority orders corresponding to different SL states, respectively; for example, if the UE is in the first SL state, the "resource selection mechanism priority order"

Equal to the first resource selection mechanism priority order (e.g., noted

Wherein

Is said "priority order of first resource selection mechanism"

The number of resource selection mechanisms involved. E.g., in order of decreasing priority from left to right, as well as in order of increasing priority from left to right); for another example, if the UE is in the second SL state, the "resource selection mechanism priority order"

Is equal toSecond resource selection mechanism priority order (e.g., noted as

Wherein

Is said "second resource selection mechanism priority order"

The number of resource selection mechanisms included in (a). E.g., in order of decreasing priority from left to right, or in order of increasing priority from left to right). Wherein optionally, the first resource selection mechanism priority order

And said second resource selection mechanism priority order

May be the same or different. For example, the first resource selection mechanism priority order

May be "full sensing, partial sensing, random resource selection"; as another example, the second resource selection mechanism prioritization order

May be "partial sensing, random resource selection".

Optionally, the "resource selection mechanism priority order"

Can be embodied directly in a set of resource selection mechanisms (e.g., the set M)_iWherein

As another example, the set M_min(ii) a In another example of this application, a,the set M_min，1(ii) a As another example, the set M_min，2(ii) a As another example, the set M_config，iWherein

As another example, the set M_all(ii) a As another example, the set M_all，1(ii) a As another example, the set M_all，2(ii) a As another example, the set M_cap(ii) a As another example, the set M_cap，1(ii) a As another example, the set M_cap，2) For example, the set of resource selection mechanisms is an ordered set, and accordingly, the priority order corresponds to the order in which the elements in the set appear (e.g., decreasing priority from left to right, or increasing priority from left to right). For example, if the set M_all，2Equal to { partial sensing, random resource selection }, then in the set M_all，2The priority of "partial sensing" is higher than "random resource selection". As another example, if the set M_all，2Equal to { partial sensing, random resource selection }, then in the set M_all，2The priority of "partial sensing" is lower than "random resource selection".

Optionally, the "SL resource allocation related information" may include an "SL energy saving" indication. Whether "SL power save" is enabled is indicated, for example, by a higher layer protocol parameter SL-powerSavingConfig.

Optionally, if "SL power saving" is not enabled, the resource pool set U_mode2Is equal to the set U_{mode2，legacy}Accordingly, the set U_mode2，newIs an empty set.

Optionally, if "SL power save" is not enabled, for the resource pool set U_mode2The parameter sl-resourceSelectionConfig does not exist.

Alternatively, if "SL power savings" is not enabled, then for the interval

Set M of one or more (e.g., all) values of i within_iEqual to { fully sensed }.

Alternatively, if "SL power savings" is not enabled, then for the interval

Set M of one or more (e.g., all) values of i within_iEqual to { full sensing, random resource selection }.

Alternatively, if "SL power savings" is not enabled, then for the interval

Set M of one or more (e.g., all) values of i within_iEqual to { full sensing, random resource selection based on sensing }.

Alternatively, if "SL power savings" is not enabled, then for the interval

The value of one or more (e.g. all) i in the set M_iEqual to { full sensing, not based on random resource selection for sensing }.

Optionally, if "SL power saving" is not enabled, the resource selection mechanism corpus M_allEqual to { fully sensed }.

Optionally, if "SL power saving" is not enabled, the complete set of resource selection mechanisms M_allEqual to { full sensing, random resource selection }.

Optionally, if "SL power saving" is not enabled, the complete set of resource selection mechanisms M_allEqual to { full sensing, random resource selection based on sensing }.

Optionally, if "SL power saving" is not enabled, the resource selection mechanism corpus M_allEqual to { full sensing, random resource selection not based on sensing }.

Optionally, if "SL power saving" is not enabled, the resource selection mechanism corpus M_allEqual to { full sensing, random resource selection based on sensing, random resource selection not based on sensing }.

Optionally, if "SL power save" is not enabled, the minimum resource is selectedSelection mechanism set M_minEqual to { full sensing }.

Optionally, if "SL power saving" is not enabled, the minimum resource selection mechanism set M_minEqual to { full sensing, partial sensing }.

Optionally, if "SL power saving" is not enabled, the minimum resource selection mechanism set M_minEqual to { full sensing, random resource selection }.

Optionally, if "SL power saving" is not enabled, the minimum resource selection mechanism set M_minEqual to { full sensing, random resource selection based on sensing }.

Optionally, if "SL power saving" is not enabled, the minimum resource selection mechanism set M_minEqual to { full sensing, not based on random resource selection for sensing }.

Optionally, if at least one logical channel in the UE is configured to enable HARQ feedback, the resource pool set U_mode2At least one resource pool is configured with resources for transmitting HARQ feedback.

Optionally, if at least one logical channel in the UE is configured to enable HARQ feedback, and the resource pool set U is configured_mode2If the resource selection mechanism set corresponding to one or more resource pools includes the resource selection mechanism m, at least one of the one or more resource pools is configured with resources for transmitting HARQ feedback. Wherein,

● optionally, the resource selection mechanism m may be a predefined or configured or preconfigured resource selection mechanism.

● optionally, the resource selection mechanism m may be one of a set of predefined or configured or preconfigured resource selection mechanisms.

● alternatively, the resource selection mechanism m can be any one of the resource selection mechanisms.

Further optionally, in step S103, a resource selection mechanism (e.g., denoted as m) is determined_current，1)。

Optionally, a resource selection mechanism is determined for each logical channel. For example, when a logicAnd when SL data needs to be transmitted in an editing channel, and/or when an SL-CSI report is triggered, and/or other conditions are met, determining a corresponding resource selection mechanism. At this time, the resource selection mechanism m_current，1Corresponding to the previous logical channel.

Optionally, a common resource selection mechanism is determined for all logical channels.

Optionally, the resource selection mechanism m_current，1Is from a candidate "resource selection mechanism set" (denoted as M, for example)_cand，1) To a resource selection mechanism determined (or otherwise selected).

Wherein,

● alternatively, the set M_cand，1Is the set of all resource selection mechanisms that satisfies the first resource selection mechanism determination condition.

● alternatively, the set M_cand，1Is in the resource selection mechanism corpus M_allA set of all resource selection mechanisms satisfying the first resource selection mechanism determination condition.

● alternatively, the set M_cand，1May be related to whether the current logical channel is configured to enable HARQ feedback. For example, if the current logical channel is configured to enable HARQ feedback, the set M_cand，1Is the set of all resource selection mechanisms that satisfies the second resource selection mechanism determination condition. For another example, if the current logical channel is configured to disable HARQ feedback, the set M_cand，1Is a set of all resource selection mechanisms that satisfies the third resource selection mechanism determination condition.

● alternatively, the set M_cand，1May be related to the SL state the UE is in. For example, if the UE is in the first SL state, the set M_cand，1Is a set of all resource selection mechanisms that satisfy the fourth resource selection mechanism determination condition. For another example, if the UE is in the second SL state, the set M is set_cand，1Is a set of all resource selection mechanisms satisfying the fifth resource selection mechanism determination condition.

● alternatively, the set M_cand，1May be related to whether the current logical channel is configured to enable HARQ feedback and the SL state the UE is in. For example, if the current logical channel is configured to enable HARQ feedback and the UE is in the first SL state, the set M_cand，1Is a set of all resource selection mechanisms that satisfy the sixth resource selection mechanism determination condition. For another example, if the current logical channel is configured to disable HARQ feedback and the UE is in the first SL state, the set M is set_cand，1Is a set of all resource selection mechanisms satisfying the seventh resource selection mechanism determination condition. For another example, if the current logical channel is configured to enable HARQ feedback and the UE is in the second SL state, the set M is set_cand，1Is a set of all resource selection mechanisms satisfying the eighth resource selection mechanism determination condition. For another example, if the current logical channel is configured to disable HARQ feedback and the UE is in the second SL state, the set M is set_cand，1Is a set of all resource selection mechanisms that satisfy the ninth resource selection mechanism determination condition.

Wherein,

● optionally, for resource selection mechanism m, any one of the "first resource selection mechanism determining condition", the "second resource selection mechanism determining condition", the "third resource selection mechanism determining condition", the "fourth resource selection mechanism determining condition", the "fifth resource selection mechanism determining condition", the "sixth resource selection mechanism determining condition", the "seventh resource selection mechanism determining condition", the "eighth resource selection mechanism determining condition" and the "ninth resource selection mechanism determining condition" may comprise one or more of the following (in any combination of the manners of "and" or "where applicable):

the UE supports the resource selection mechanism m.

The resource selection mechanism M is in the corpus M of resource selection mechanisms_allIn (1).

The resource selection mechanism M is at the first resource selection mechanism corpus M_all，1In (1). (e.g., when the UE is in a first SL stateApplying this condition)

The resource selection mechanism M is at the second resource selection mechanism corpus M_all，2In (1). (e.g., applying this condition when the UE is in the second SL state)

The resource selection mechanism M in the set of minimum resource selection mechanisms M_minIn (1).

The resource selection mechanism M is in the first set of minimum resource selection mechanisms M_min，1In (1). (e.g., applying this condition when the UE is in the first SL state)

The resource selection mechanism M is in the second set of minimum resource selection mechanisms M_min，2In (1). (e.g., applying this condition when the UE is in the second SL state)

The resource selection mechanism m in the set

In (1).

The resource selection mechanism m in the set

In (1).

The resource selection mechanism m in the set

In (1).

The resource selection mechanism m in the set

In (1). (e.g., applying this condition when the UE is in the first SL state)

The resource selection mechanism m in the set

In (1). (e.g., applying this condition when the UE is in the second SL state)

For the resource selection mechanism m, the resource pool set U_mode2Therein is at least provided with

Each resource pool satisfies a first resource pool configuration condition.

For the resource selection mechanism m, the resource pool set U_mode2Therein is provided with

Each resource pool satisfies a first resource pool configuration condition.

For the resource selection mechanism m, the resource pool set U_mode2At most have

Each resource pool satisfies a first resource pool configuration condition.

Wherein for said

Resource pools (e.g. separately noted

… …, and

) And the resource selection mechanism m, the "first resource pool configuration condition" may comprise one or more of the following (in any combination of and or, where applicable):

the resource pool

… …, and

respectively corresponding resource selection mechanism sets

… …, species

Each containing the resource selection mechanism m.

The resource pool

… …, and

are configured with resources for transmitting HARQ feedback. (e.g., applying this condition when the current logical channel is configured to enable HARQ feedback)

● alternatively, the set M_cand，1Is the set of minimum resource selection mechanisms M_minThe set Mcap, the set

Collection

And collections

And said resource selection mechanism corpus M_allSome or all of them.

Optionally, the resource selection mechanism m_current，1Is from the candidate "resource selection mechanism set" M_cand，1Any one of the resource selection mechanisms selected (e.g., randomly selected).

Optionally, the resource selection mechanism m_current，1Is from the candidate set of resource selection mechanisms M_cana，1Any one of the resource selection mechanisms supported by the UE that is selected (e.g., randomly selected).

Optionally, if the UE is in the first SLState, then the resource selection mechanism m_current，1Is from the candidate set of resource selection mechanisms M_cand，1Any one of the resource selection mechanisms of (a) selecting (e.g., randomly selecting).

Optionally, if the UE is in the first SL state, the resource selection mechanism m_current，1Is from the candidate set of resource selection mechanisms M_cand，1Any one of the resource selection mechanisms supported by the UE that is selected (e.g., randomly selected).

Optionally, if the UE is in the second SL state, the resource selection mechanism m_current，1Is from the candidate set of resource selection mechanisms M_cand，1Any one of the resource selection mechanisms selected (e.g., randomly selected).

Optionally, if the UE is in the second SL state, the resource selection mechanism m_current，1Is from the candidate set of resource selection mechanisms M_cand，1Any one of the resource selection mechanisms supported by the UE that is selected (e.g., randomly selected).

Optionally, the resource selection mechanism m_current，1According to said "resource selection mechanism priority order"

From the candidate set of resource selection mechanisms M_cand，1The determined one resource selection mechanism (e.g., the resource selection mechanism m)_current，1According to said "resource selection mechanism priority order"

The determined set of candidate "resource selection mechanisms" M_cand，1The highest priority resource selection mechanism).

Optionally, if the UE is in the first SL state, the resource selection mechanism m_current，1Is based on said "priority order of the first resource selection mechanism"

From the candidate set of resource selection mechanisms M_cand，1The determined one resource selection mechanism (e.g., the resource selection mechanism m)_current，1Is based on said "priority order of the first resource selection mechanism"

The determined set of candidate "resource selection mechanisms" M_cana，1The highest priority resource selection mechanism).

Optionally, if the UE is in the second SL state, the resource selection mechanism m_current，1Is according to said "second resource selection mechanism priority order"

From the candidate set of resource selection mechanisms M_cana，1A resource selection mechanism (e.g., the resource selection mechanism mm) determined in (c)_current，1Is according to said "second resource selection mechanism priority order"

Optionally, the resource selection mechanism m_current，1Is based on the resource selection mechanism corpus M_allCorresponding resource selection mechanism priority order from the candidate resource selection mechanism set M_cand，1A resource selection mechanism (e.g., the resource selection mechanism m) determined in (c)_current，1Is based on the resource selection mechanism corpus M_allThe candidate resource selection mechanism set M determined by the corresponding resource selection mechanism priority order_cana，1The highest priority resource selection mechanism).

Optionally, if the UE is in the first SL state, the resource selection mechanism m_current，1Is based on said first resource selection mechanismComplete set M_all，1Corresponding resource selection mechanism priority order from the candidate resource selection mechanism set M_cand，1The determined one resource selection mechanism (e.g., the resource selection mechanism m)_current，1Is according to said first resource selection mechanism corpus M_all，1The candidate resource selection mechanism set M determined by the corresponding resource selection mechanism priority order_cana，1The highest priority resource selection mechanism).

Optionally, if the UE is in the second SL state, the resource selection mechanism m_current，1Is according to said second resource selection mechanism corpus M_all，2Corresponding resource selection mechanism priority order from the candidate resource selection mechanism set M_cand，1The determined one resource selection mechanism (e.g., the resource selection mechanism m)_current，1Is according to said second resource selection mechanism corpus M_all，2The candidate resource selection mechanism set M determined by the corresponding resource selection mechanism priority order_cand，1The highest priority resource selection mechanism).

Optionally, in said "resource selection mechanism priority order

"determining (or adjusting) the set of candidate" resource selection mechanisms "M_cand，1The priority order of the resource selection mechanism in (1).

Optionally, if the UE is in the first SL state, the "first resource selection mechanism priority order" is followed "

Determining (or adjusting) the set of candidate "resource selection mechanisms" M_cand，1The priority order of the resource selection mechanism in (1).

Optionally, if the UE is in the second SL state, the "second resource selection mechanism priority order" is followed "

Optionally, a complete set M of resource selection mechanisms is defined_allThe corresponding resource selection mechanism priority order determines (or adjusts) the candidate "resource selection mechanism set" M_cand，1The priority order of the resource selection mechanism in (1).

Optionally, if the UE is in the first SL state, the first resource selection mechanism corpus M is used_all，1The corresponding resource selection mechanism priority order determines (or adjusts) the candidate "resource selection mechanism set" M_cand，1The priority order of the resource selection mechanism in (1).

Optionally, if the UE is in the second SL state, the complete set M of the second resource selection mechanism is used_all，2The corresponding resource selection mechanism priority order determines (or adjusts) the candidate "resource selection mechanism set" M_cand，1The priority order of the resource selection mechanism in (1).

Optionally, the resource selection mechanism m_current，1Is based on said candidate set of resource selection mechanisms M_cana，1A resource selection mechanism (e.g., the resource selection mechanism m) determined by the priority order of the resource selection mechanisms in (b)_current，1Is the candidate set of resource selection mechanisms M_cand，1The highest priority resource selection mechanism).

Optionally, if the candidate "resource selection mechanism set" M_cand，1If the resource is an empty set, the resource selection mechanism m is used_current，1Determined as a predefined or configured or preconfigured resource selection mechanism (e.g. denoted m)_fallback，1). E.g. m_fallback，1Is "fully sensed"; in another example, m_fallback，1Is "partial sensing"; in another example, m_fallback，1Is "random resource selection"; in another example, m_fallback，1Is "sensing-based random resource selection"; in another example, m_fallback，1Is "not basedAt the sensed random resource selection ". Alternatively, m_fallback，1Related to the SL state the UE is in. For example, if the UE is in a first SL state, then m_fallback，1Is "fully sensed"; for another example, if the UE is in the first SL state, m is_fallback，1Is "partial sensing"; for another example, if the UE is in the first SL state, m is_fallback，1Is "random resource selection"; in another example, if the UE is in the first SL state, m_fallback，1Is "sensing-based random resource selection"; for another example, if the UE is in the first SL state, m is_fallback，1Is "random resource selection not based on sensing"; in another example, if the UE is in the second SL state, m_fallback，1Is "fully sensed"; in another example, if the UE is in the second SL state, m_fallback，1Is "partial sensing"; for another example, if the UE is in the second SL state, m is_fallback，1Is "random resource selection"; for another example, if the UE is in the second SL state, m is_fallback，1Is "sensing-based random resource selection"; for another example, if the UE is in the second SL state, m is_fallback，1Is "random resource selection not based on sensing".

Optionally, if the candidate "resource selection mechanism set" M_cand，1If the resource is an empty set, the resource selection mechanism m is set_current，1Determining any one resource selection mechanism supported for the UE.

Optionally, if the candidate "resource selection mechanism set" M_cand，1If the resource is an empty set, the resource selection mechanism m is set_current，1Determining supported by the UE in the "resource selection mechanism priority order"

A determined highest priority resource selection mechanism.

Optionally, if the UE is in the first SL state and the candidate set of resource selection mechanisms "M_cand，1If the resource is an empty set, the resource selection mechanism m is used_current，1Determining as the UE is supportingIn said "priority order of the first resource selection mechanism"

A determined highest priority resource selection mechanism.

Optionally, if the UE is in a second SL state and the candidate set of resource selection mechanisms M_cand，1If the resource is an empty set, the resource selection mechanism m is used_current，1Determining a priority order in the second resource selection mechanism supported for the UE "

A determined highest priority resource selection mechanism.

Optionally, if the candidate "resource selection mechanism set" M_cand，1Is an empty set, the UE does not perform SL resource allocation mode 2.

Optionally, the resource selection mechanism m_current，1In determining the resource selection mechanism m (e.g., in determining the resource selection mechanism m)_current，1Then, the candidate "resource selection mechanism set" M_cand，1And from said candidate set of resource selection mechanisms M_cand，1The manner in which a resource selection mechanism is selected, etc.) with the resource pool set U_mode2The arrangement of (2) is related. For example, if the resource pool set U_mode2Configured by a parameter sl-TxPolSelectdFormal-r 16, the resource selection mechanism m is determined in one way_current，1(ii) a If the resource pool set U_mode2Configured by parameter sl-txport explicit-r 16, the resource selection mechanism m is determined in another way_current，1。

Optionally, the resource selection mechanism m is applied_current，1Determined as "fully sensed".

Optionally, if one or more of the following are satisfied, the resource selection mechanism m is used_current，1Determined as "full sense":

● the UE supports "full sensing".

● the resource pool set U_mode2Therein is at least provided with

A resource pool (e.g. a pool of resources

) Respectively corresponding resource selection mechanism sets (e.g.

) Each of which contains "full sensing".

● the resource pool set U_mode2Therein is provided with

A resource pool (e.g. a pool of resources

) Respectively corresponding resource selection mechanism sets (e.g.

) Each of which contains "full sensing".

● the resource pool set U_mode2In at most have

A resource pool (e.g. a pool of resources

) Respectively corresponding resource selection mechanism sets (e.g.

) Each of which contains "full sensing".

● the UE is in a first SL state.

● the UE is in a second SL state.

Optionally, the resource selection mechanism m is applied_current，1Determined as "partial sensing".

Optionally, if one or more of the following is satisfied, the resource selection mechanism m is used_current，1Determined as "partial sense":

● the UE supports "partial sensing".

● the resource pool set U_mode2Therein is at least provided with

A resource pool (e.g. a pool of resources

) Respectively corresponding resource selection mechanism sets (e.g.

) Each of which contains "partial sensing".

● the resource pool set U_mode2Therein is provided with

A resource pool (e.g. a pool of resources

) Respectively corresponding resource selection mechanism sets (e.g.

) Each of which contains "partial sensing".

● the resource pool set U_mode2At most have

A resource pool (e.g. a pool of resources

) Respectively corresponding resource selection mechanism sets (e.g.

) Each of which includes "partial sensing".

● the UE is in a first SL state.

● the UE is in a second SL state.

Optionally, the resource selection mechanism m is applied_current，1Determined as "random resource selection".

Optionally, if one or more of the following is satisfied, the resource selection mechanism m is used_current，1Determined as "random resource selection":

● the UE supports "random resource selection".

● the resource pool set U_mode2Therein is at least provided with

A resource pool (e.g. a pool of resources

) Respectively corresponding resource selection mechanism sets (e.g.

) Each of which contains a "random resource selection".

● the resource pool set U_mode2Therein is provided with

A resource pool (e.g. a pool of resources

) Respectively corresponding resource selection mechanism sets (e.g.

) In (1)Each containing a "random resource selection".

● the resource pool set U_mode2At most have

A resource pool (e.g. a pool of resources

) Respectively corresponding resource selection mechanism sets (e.g.

) Each of which contains a "random resource selection".

● the UE is in a first SL state.

● the UE is in a second SL state.

Optionally, the resource selection mechanism m is applied_current，1Determined as "random resource selection based on sensing".

Optionally, if one or more of the following is satisfied, the resource selection mechanism m is used_current，1Determined as "sensing-based random resource selection":

● the UE supports "random resource selection based on sensing".

● the resource pool set U_mode2Therein is at least provided with

A resource pool (e.g. a pool of resources

) Respectively corresponding resource selection mechanism sets (e.g.

) Each of which contains "random resource selection based on sensing".

● the resource pool set U_mode2Therein is provided with

A resource pool (e.g. a pool of resources

) Respectively corresponding resource selection mechanism sets (e.g.

) Each of which contains "random resource selection based on sensing".

● the resource pool set U_mode2At most have

A resource pool (e.g.

) Respectively corresponding resource selection mechanism sets (e.g.

) Each of which contains "random resource selection based on sensing".

● the UE is in a first SL state.

● the UE is in a second SL state.

Optionally, the resource selection mechanism m is applied_current，1Determined as "not based on the sensed random resource selection".

Optionally, if one or more of the following is satisfied, the resource selection mechanism m is used_current，1Determined as "random resource selection not based on sensing":

● the UE supports "random resource selection not based on sensing".

● the resource pool set U_mode2Therein is at least provided with

A resource pool (e.g. a pool of resources

) Respectively corresponding resource selection mechanism sets (e.g.

) Each of which contains "random resource selection not based on sensing".

● the resource pool set U_mode2Therein is provided with

A resource pool (e.g. a pool of resources

) Respectively corresponding resource selection mechanism sets (e.g.

) Each of which contains "random resource selection not based on sensing".

● the resource pool set U_mode2At most have

A resource pool (e.g. a pool of resources

) Respectively corresponding resource selection mechanism sets (e.g.

) Each of which contains "random resource selection not based on sensing".

● the UE is in a first SL state.

● the UE is in a second SL state.

Further optionally, in step S105, a resource pool (e.g. denoted as u) is determined_current，1)。

Optionally, the determination is made separately for each logical channelAnd determining a resource pool. For example, when there is SL data to be transmitted in a certain logical channel, and/or when a SL-CSI report is triggered, and/or other conditions are met, the corresponding resource pool is determined. At this time, the resource pool u_current，1Corresponding to the previous logical channel.

Optionally, a common resource pool u is determined for all logical channels_current，1。

Optionally, the resource pool u_current，1Is from a candidate "resource pool set" (e.g. denoted as U)_cand，1) To a resource pool determined (or selected). Wherein,

● optionally, the candidate "resource pool set" U_cand，1Is a set of all resource pools that satisfy the first resource pool determination condition.

● optionally, the candidate "resource pool set" U_cand，1Is the resource pool set U_mode2(or the resource pool set U_{mode2，legacy}Or the resource pool set U_mode2，new) A set of all resource pools satisfying the first resource pool determination condition.

● optionally, the candidate "resource pool set" U_cand，1May be related to whether the current logical channel is configured to enable HARQ feedback. For example, if the current logical channel is configured to enable HARQ feedback, the candidate "resource pool set" U_cand，1Is the set of all resource pools that satisfy the second resource pool determination condition. For another example, if the current logical channel is configured to disable HARQ feedback, the candidate "resource pool set" U_cand，1Is the set of all resource pools that satisfy the third resource pool determination condition.

● optionally, the candidate "resource pool set" U_cand，1May be related to the SL state the UE is in. For example, if the UE is in the first SL state, the candidate "resource pool set" U_cand，1Is a set of all resource pools that satisfy the fourth resource pool determination condition. For another example, if the UE is in the second SL state, the candidate "resource pool set" U_cand，1Is to satisfy the fifth resourceThe pool determines the set of all resource pools for the condition.

● optionally, the candidate "resource pool set" U_cand，1May be related to whether the current logical channel is configured to enable HARQ feedback and the SL state the UE is in. For example, if the current logical channel is configured to enable HARQ feedback and the UE is in the first SL state, the candidate "resource pool set" U_cand，1Is a set of all resource pools that satisfy the sixth resource pool determination condition. For another example, if the current logical channel is configured to disable HARQ feedback and the UE is in the first SL state, the candidate "resource pool set" U_cand，1Is a set of all resource pools that satisfy the seventh resource pool determination condition. For another example, if the current logical channel is configured to enable HARQ feedback and the UE is in the second SL state, the candidate "resource pool set" U_cand，1Is a set of all resource pools that satisfy the eighth resource pool determination condition. For another example, if the current logical channel is configured to disable HARQ feedback and the UE is in the second SL state, the candidate "resource pool set" U_cand，1Is a set of all resource pools that satisfy the ninth resource pool determination condition.

Wherein,

● optionally, for resource pool u, any one of the "first resource pool determining condition", the "second resource pool determining condition", the "third resource pool determining condition", the "fourth resource pool determining condition", the "fifth resource pool determining condition", the "sixth resource pool determining condition", the "seventh resource pool determining condition", the "eighth resource pool determining condition" and the "ninth resource pool determining condition" may include one or more of the following (in any combination of "and" or "where applicable):

the resource pool U collects U in the resource pool_mode2In (1).

The resource pool U collects U in the resource pool_{mode2，legacy}In (1).

The resource pool U collects U in the resource pool_mode2，newIn (1).

And determining that the resource selection mechanism set M corresponding to the resource pool u is not an empty set.

The resource selection mechanism M is contained in the resource selection mechanism set M corresponding to the resource pool u_current，1。

At least one resource selection mechanism supported by the UE is included in the set M of resource selection mechanisms corresponding to the resource pool u.

And the resource selection mechanism set M corresponding to the resource pool u comprises all resource selection mechanisms supported by the UE.

At least a resource selection mechanism set M corresponding to the resource pool u is included in the set M_capA resource selection mechanism.

Including a resource selection mechanism set M corresponding to the resource pool u_capAll resource selection mechanisms in (1).

At least a resource selection mechanism set M corresponding to the resource pool u is included in the set M_cap，1A resource selection mechanism. (e.g., applying this condition when the UE is in the first SL state)

Including a resource selection mechanism set M corresponding to the resource pool u_cap，1All resource selection mechanisms in (1). (e.g., applying this condition when the UE is in the first SL state)

At least a resource selection mechanism set M corresponding to the resource pool u is included in the set M_cap，2A resource selection mechanism. (e.g., applying this condition when the UE is in the second SL state)

Including a resource selection mechanism set M corresponding to the resource pool u_cap，2All resource selection mechanisms in (1). (e.g., applying this condition when the UE is in the second SL state)

At least the resource selection mechanism complete set M is contained in the resource selection mechanism set M corresponding to the resource pool u_allA resource selection mechanism.

The resource selection mechanism set M corresponding to the resource pool u containsThe resource selection mechanism corpus M_allAll resource selection mechanisms in (1).

At least the first resource selection mechanism corpus M is included in the resource selection mechanism set M corresponding to the resource pool u_all，1A resource selection mechanism. (e.g., applying this condition when the UE is in the first SL state)

The resource selection mechanism set M corresponding to the resource pool u comprises the first resource selection mechanism corpus M_all，1All resource selection mechanisms in (1). (e.g., applying this condition when the UE is in the first SL state)

At least the second resource selection mechanism corpus M is included in the resource selection mechanism set M corresponding to the resource pool u_all，2A resource selection mechanism. (e.g., applying this condition when the UE is in the second SL state)

The resource selection mechanism set M corresponding to the resource pool u comprises the second resource selection mechanism corpus M_all，2All resource selection mechanisms in (1). (e.g., applying this condition when the UE is in the second SL state)

At least the minimum resource selection mechanism set M is included in the resource selection mechanism set M corresponding to the resource pool u_minA resource selection mechanism.

The resource selection mechanism set M corresponding to the resource pool u comprises the minimum resource selection mechanism set M_minAll resource selection mechanisms in (1).

At least the first minimum resource selection mechanism set M is included in the resource selection mechanism set M corresponding to the resource pool u_min，1A resource selection mechanism. (e.g., applying this condition when the UE is in the first SL state)

The resource selection mechanism set M corresponding to the resource pool u comprises the first minimum resource selection mechanism set M_min，1All resource selection mechanisms in (1). (e.g., applying this condition when the UE is in the first SL state)

At least the first one is included in a set M of resource selection mechanisms corresponding to the resource pool uTwo minimum resource selection mechanism sets M_min，2A resource selection mechanism. (e.g., applying this condition when the UE is in the second SL state)

The resource selection mechanism set M corresponding to the resource pool u comprises the second minimum resource selection mechanism set M_min，2All resource selection mechanisms in (1). (e.g., applying this condition when the UE is in the second SL state)

The resource pool u configures resources for transmitting HARQ feedback. (e.g., applying this condition when the current logical channel is configured to enable HARQ feedback)

Optionally, the resource pool u_current，1Is from the candidate "resource pool set" U_cand，1Any one of the resource pools selected (e.g., randomly selected).

Optionally, if the UE is in the first SL state, the resource pool u_current，1Is from the candidate "resource pool set" U_cand，1(e.g., candidate "resource pool set" U for the first SL state_cand，1) Any one of the resource pools selected (e.g., randomly selected).

Optionally, if the UE is in the second SL state, the resource pool u_current，1Is from the candidate "resource pool set" U_cand，1(e.g., candidate "resource pool set" U for the second SL state_cand，1) Any one of the resource pools selected (e.g., randomly selected).

Optionally, if the logical channel is configured to enable HARQ feedback, the resource pool u_current，1Is from the candidate "resource pool set" U_cand，1Any one of the resource pools in which resources for transmitting HARQ feedback are configured, which is selected (e.g., randomly selected).

Optionally, if the logical channel is configured to disable HARQ feedback, the resource pool u_current，1Is from the candidate "resource pool set" U_cand，1Any one of the resource pools selected (e.g., randomly selected).

Optionally, if the logical channel isConfigured to enable HARQ feedback, the resource pool u_current，1Is from the candidate "resource pool set" U_cand，1(e.g., the candidate "resource pool set" U corresponding to when HARQ feedback is configured as enabled_cand，1) Any one of the resource pools selected (e.g., randomly selected).

Optionally, if the logical channel is configured to disable HARQ feedback, the resource pool u_current，1Is from the candidate "resource pool set" U_cand，1(e.g., the candidate "resource pool set" U for which HARQ feedback is configured to be de-enabled_cand，1) Any one of the resource pools selected (e.g., randomly selected).

Optionally, if the candidate "resource pool set" U_cand，1If the resource pool is an empty set, the resource pool u is used_current，1Determined as a predefined or configured or preconfigured resource selection mechanism (e.g. denoted u)_fallback，1)。

Optionally, if the candidate "resource pool set" U_cand，1If the resource pool is an empty set, the resource pool u is used_current，1Is determined as the resource pool set U_mode2Any one of the resource pools.

Optionally, if the candidate "resource pool set" U_cand，1If the resource pool is an empty set, the resource pool u is used_current，1Is determined as the resource pool set U_{mode2，legacy}Any one of the resource pools.

Optionally, if the candidate "resource pool set" U_cand，1If the resource pool is an empty set, the resource pool u is used_current，1Is determined as the resource pool set U_mode2，newAny one of the resource pools.

Further optionally, in step S107, based on the resource selection mechanism m_current，1And/or the resource pool u_current，1SL resource allocation pattern 2 is performed.

Optionally, in the first embodiment of the present invention, when it is configured to be transmitted in SL communication and there is related data to be transmitted, the step S101 and/or the step S103 and/or the step S105 and/or the step S107 are executed.

Optionally, in the first embodiment of the present invention, when an operation related to SL resource allocation mode 2 needs to be performed (for example, when a transmission resource for one transport block needs to be selected, or when a transmission resource for a plurality of transport blocks needs to be selected), the step S101 and/or the step S103 and/or the step S105 and/or the step S107 are performed.

Optionally, in the first embodiment of the present invention, the step S101 and/or the step S103 and/or the step S105 and/or the step S107 are performed by an RRC layer protocol entity of the UE.

Optionally, in the first embodiment of the present invention, the step S101 and/or the step S103 and/or the step S105 and the step S107 are performed by a MAC layer protocol entity of the UE. Optionally, the MAC layer protocol entity of the UE performs the step S101 and/or the step S103 and/or the step S105 and the step S107 for each SL process (or SL HARQ process), respectively.

Optionally, in the first embodiment of the present invention, the random selection may be to randomly determine (or select) one element in a set in an equal probability manner.

Optionally, in the first embodiment of the invention, the

May be a predefined or configured or preconfigured value, e.g.

In another example

Optionally, in the first embodiment of the present invention, a manner of configuring one logical channel to enable HARQ feedback may be to configure a value of the corresponding parameter sl-HARQ-feedback enabled-r16 as "enabled".

Optionally, in the first embodiment of the present invention, a manner of configuring one logical channel to disable HARQ feedback may be to configure a value of the corresponding parameter sl-HARQ-FeedbackEnabled-r16 as "disabled".

Optionally, in the first embodiment of the present invention, the "resource for transmitting HARQ feedback" may be a PSFCH resource.

Thus, according to the first embodiment, the present invention provides a method, which enables resource allocation to be performed in a suitable resource pool according to a suitable resource selection mechanism in the SL resource allocation mode 2 by flexibly setting rules for determining the resource selection mechanism and the resource pool, thereby improving the performance of the SL resource allocation mode 2.

[ example two ]

The method performed by the user equipment according to the second embodiment of the present invention is described below with reference to fig. 2.

As shown in fig. 2, in the second embodiment of the present invention, the steps performed by the user equipment UE include: some or all of step S201, step S203, step S205, and step S207.

Specifically, optionally, in step S201, information related to SL resource allocation is acquired. For example, according to step S101 in the first embodiment, information related to SL resource allocation is acquired.

Further optionally, in step S203, a resource pool (e.g., denoted as u) is determined_current，2)。

Optionally, a resource pool is determined for each logical channel. For example, when there is SL data to be transmitted in a certain logical channel, and/or when a SL-CSI report is triggered, and/or other conditions are met, the corresponding resource pool is determined. At this time, the resource pool u_current，2Corresponding to the previous logical channel.

Optionally, a common resource pool u is determined for all logical channels_current，2。

Optionally, the resource pool u_current，2Is from a candidate "resource pool set" (e.g.)If is marked as U_cand，2) To a resource pool determined (or selected). Wherein,

● optionally, the candidate "resource pool set" U_cand，2Is a set of all resource pools that satisfy the tenth resource pool determination condition.

● optionally, the candidate "resource pool set" U_cand，2Is the resource pool set U_mode2(or the resource pool set U_{mode2，legacy}Or the resource pool set U_mode2，new) The set of all resource pools satisfying the tenth resource pool determination condition.

● optionally, the candidate "resource pool set" U_cand，2May be related to whether the current logical channel is configured to enable HARQ feedback. For example, if the current logical channel is configured to enable HARQ feedback, the candidate "resource pool set" U_cand，2Is a set of all resource pools that satisfy the eleventh resource pool determination condition. For another example, if the current logical channel is configured to disable HARQ feedback, the candidate "resource pool set" U_cand，2Is a set of all resource pools that satisfy the twelfth resource pool determination condition.

● optionally, the candidate "resource pool set" U_cand，2May be related to the SL state the UE is in. For example, if the UE is in a first SL state, the candidate "resource pool set" U_cand，2Is a set of all resource pools that satisfy the thirteenth resource pool determination condition. For another example, if the UE is in the second SL state, the candidate "resource pool set" U_cand，2Is a set of all resource pools that satisfy the fourteenth resource pool determination condition.

● optionally, the candidate "resource pool set" U_cand，2May be related to whether the current logical channel is configured to enable HARQ feedback and the SL state the UE is in. For example, if the current logical channel is configured to enable HARQ feedback and the UE is in the first SL state, the candidate "resource pool set" U_cand，2Is a set of all resource pools that satisfy the fifteenth resource pool determination condition. As another example, if the current logic isThe UE is in a first SL state, and the candidate 'resource pool set' U is determined_cand，2Is a set of all resource pools that satisfy the sixteenth resource pool determination condition. For another example, if the current logical channel is configured to enable HARQ feedback and the UE is in the second SL state, the candidate "resource pool set" U_cand，2Is a set of all resource pools that satisfy the seventeenth resource pool determination condition. For another example, if the current logical channel is configured to disable HARQ feedback and the UE is in the second SL state, the candidate "resource pool set" U_cand，2Is a set of all resource pools that satisfy the eighteenth resource pool determination condition.

Wherein,

● optionally, for resource pool u, any one of the "tenth resource pool determining condition", the "eleventh resource pool determining condition", the "twelfth resource pool determining condition", the "thirteenth resource pool determining condition", the "fourteenth resource pool determining condition", the "fifteenth resource pool determining condition", the "sixteenth resource pool determining condition", the "seventeenth resource pool determining condition" and the "eighteenth resource pool determining condition" may include one or more of the following (in any combination of "and" or "where applicable):

the resource pool U collects U in the resource pool_mode2In (1).

The resource pool U collects U in the resource pool_{mode2，legacy}In (1).

The resource pool U collects U in the resource pool_mode2，newIn (1).

At least the resource selection mechanism set M corresponding to the resource pool u includes the resource selection mechanisms supported by the UE

A resource selection mechanism.

The resource pool u correspondsComprises at least said set M in the set M of resource selection mechanisms_capIn (1)

A resource selection mechanism.

At least a resource selection mechanism set M corresponding to the resource pool u is included in the set M_cap，1In (1)

A resource selection mechanism. (e.g., applying this condition when the UE is in the first SL state)

At least a resource selection mechanism set M corresponding to the resource pool u is included in the set M_cap，2In (1)

A resource selection mechanism. (e.g., applying this condition when the UE is in the second SL state)

At least the resource selection mechanism complete set M is contained in the resource selection mechanism set M corresponding to the resource pool u_allIn (1)

A resource selection mechanism.

At least the first resource selection mechanism corpus M is included in the resource selection mechanism set M corresponding to the resource pool u_all，1In (1)

At least the second resource selection mechanism corpus M is included in the resource selection mechanism set M corresponding to the resource pool u_all，2In (1)

All ofThe resource selection mechanism set M corresponding to the resource pool u at least comprises the minimum resource selection mechanism set M_minA resource selection mechanism.

At least the first minimum resource selection mechanism set M is included in the resource selection mechanism set M corresponding to the resource pool u_min，1In (1)

At least the second minimum resource selection mechanism set M is included in the resource selection mechanism set M corresponding to the resource pool u_min，2In (1)

A resource selection mechanism set M corresponding to the resource pool u contains the resource selection mechanism corpus M_allAll resource selection mechanisms in (1).

The resource selection mechanism set M corresponding to the resource pool u comprises the first resource selection mechanism corpus M_all，1All resource selection mechanisms in (1). (e.g., when the UE is in a first SL-like stateApplying the condition when the state is changed

Optionally, if the candidate "resource pool set" U_cand，2If the resource pool is an empty set, the resource pool u is used_current，2Determined as a predefined or configured or preconfigured resource pool (e.g. denoted u)_fallback，2). Alternatively, u_fallback，2Related to the SL state the UE is in. Alternatively, u_fallback，2Whether the current logical channel is configured to enable HARQ feedback.

Optionally, if the candidate "resource pool set" U_cand，2If the resource pool is an empty set, the resource pool u is used_current，2Is determined as the resource pool set U_mode2Any one of the resource pools.

Optionally, if the candidate "resource pool set" U_cand，2If the resource pool is an empty set, the resource pool u is used_current，2Is determined as the resource pool set U_{mode2，legacy}Any one of the resource pools.

Optionally, if the candidate "resource pool set" U_cand，2If the resource pool is an empty set, the resource pool u is used_current，2Is determined as the resource pool set U_mode2，newAny one of the resource pools.

Optionally, the resource pool u_current，2Is from the candidate "resource pool set" U_cand，2Any one of the resource pools selected (e.g., randomly selected).

Optionally, if the UE is in the first SL state, the resource pool u_current，2Is from the candidate "resource pool set" U_cand，2(e.g., candidate "resource pool set" U for the first SL state_cand，2) Any one of the resource pools selected (e.g., randomly selected).

Optionally, if the UE is in the second SL state, the resource pool u_current，2Is from the candidate "resource pool set" U_cand，2(e.g., candidate "resource pool set" U for the second SL state_cand，2) Any one of the resource pools selected (e.g., randomly selected).

Optionally, the resource pool u_current，2Can be based on said "resource selection mechanism priority order"

And (4) determining. For example, note the candidate "resource pool set" U_cand，2Wherein the corresponding set of resource selection mechanisms comprises

Is a set of all resource pools of

The candidate "resource pool set" U_cand，2Wherein the corresponding set of resource selection mechanisms comprises

Is a set of all resource pools of

… …, the candidate "resource pool set" U_cand，2Wherein the corresponding set of resource selection mechanisms comprises

Is a set of all resource pools of

Then the resource pool u_current，2Is from the set

Is selected (e.g., randomly selected) from the first (e.g., in left-to-right order, such as in right-to-left order) non-empty set of (e.g., in random order).

Optionally, if the UE is in the first SL state, the resource pool u_current，2May be based on said "first resource selection mechanism priority order"

Is a set of all resource pools of

Is a set of all resource pools of

… …, the set U_cand，2Wherein the corresponding set of resource selection mechanisms comprises

Is a set of all resource pools of

Then the resource pool u_current，2Is from the set

Is selected (e.g., randomly selected) from the first (e.g., in left-to-right order, or in right-to-left order) non-empty set of (e.g., in random order).

Optionally, if the UE is in the second SL state, the resource pool u is configured to be used for resource allocation_current，2May be based on said "second resource selection mechanism priority order"

Is composed of a set of all resource pools of

Is a set of all resource pools of

Is a set of all resource pools of

Then the resource pool u_current，2Is from the set

Optionally, if the current logical channel is configured to enable HARQ feedback, the resource pool u_current，2Is from the candidate "resource pool set" U_cand，2Any one of the resource pools in which resources for transmitting HARQ feedback are configured, which is selected (e.g., randomly selected).

Optionally, if the current logical channel is configured to disable HARQ feedback, the resource pool u_current，2Is from the candidate "resource pool set" U_cand，2Any one of the resource pools selected (e.g., randomly selected).

Optionally, if the UE is in the first SL state and the current logical channel is configured to enable HARQ feedback, the resource pool u_current，2May be based on said "first resource selection mechanism priority order"

And the set of all resource pools for which resources for transmitting HARQ feedback are configured is

Then the resource pool u_current，2Is from the set

Optionally, if the UE is in the first SL state and the current logical channel is configured to disable HARQ feedback, the resource pool u_current，2May be based on said "first resource selection mechanism priority order"

Is a set of all resource pools of

Is a set of all resource pools of

Is a set of all resource pools of

Then the resource pool u_current，2Is from the set

Optionally, if the UE is in the second SL state and the current logical channel is configured to enable HARQ feedback, the resource pool u_current，2May be based on said "second resource selection mechanism priority order"

Then the resource pool u_current，2Is from the set

Optionally, if the UE is in the second SL state and the current logical channel is configured to disable HARQ feedback, the resource pool u_current，2May be based on said "second resource selection mechanism priority order"

Is a set of all resource pools of

Is a set of all resource pools of

Is a set of all resource pools of

Then the resource pool u_current，2Is from the set

Further optionally, in step S205, a resource selection mechanism (e.g., denoted as m) is determined_current，2)。

Optionally, a resource selection mechanism is determined for each logical channel. For example, when there is SL data to be transmitted in a certain logical channel, and/or when a SL-CSI report is triggered, and/or other conditions are met, the corresponding resource selection mechanism is determined. At this time, the resource selection mechanism m_current，2Corresponding to the previous logical channel.

Optionally, the resource selection mechanism m_current，2Is from the resource pool u_current，2Corresponding set of resource selection mechanisms (e.g., M)_current，2) Any one of the resource selection mechanisms selected (e.g., randomly selected).

Optionally, the resource selection mechanism m_current，2Is from the resource pool u_current，2Corresponding set of resource selection mechanisms (e.g., M)_current，2) Any one of the resource selection mechanisms supported by the UE that is selected (e.g., randomly selected).

Optionally, the resource selection mechanism m_current，2Is from the resource pool u_current，2Corresponding set of resource selection mechanisms (e.g., M)_current，2) Highest priority (e.g., according to the "resource selection mechanism priority order") of (e.g., random selection of) "

The highest priority determined).

Optionally, the resource selection mechanism m_current，2Is from the resource pool u_current，2Corresponding set of resource selection mechanisms (e.g., M)_current，2) Highest priority supported by the UE (e.g., according to the "resource selection mechanism priority order") of medium selection (e.g., random selection) "

The highest priority determined).

Optionally, if the UE is in the first SL state, the resource selection mechanism m is configured to perform the resource selection_current，2Is from the resource pool u_current，2Corresponding set of resource selection mechanisms (e.g., M)_current，2) The highest priority of (e.g., according to the "first resource selection mechanism priority order") of (e.g., random selection of) "

The highest priority determined).

Optionally, if the UE is in the first SL state, the resource selection mechanism m is configured to perform the resource selection_current，2Is from the resource pool u_current，2Corresponding set of resource selection mechanisms (e.g., M)_current，2) Highest priority supported by the UE (e.g., in accordance with the "first resource selection mechanism priority order") of medium selection (e.g., random selection) "

The highest priority determined).

Optionally, if the UE is in the second SL state, the resource selection mechanism m_current，2Is from the resource pool u_current，2Corresponding set of resource selection mechanisms (e.g., M)_current，2) Highest priority (e.g., in accordance with the "second resource selection mechanism priority order") of (e.g., random selection of) the selection "

The highest priority determined).

Optionally, if the UE is in the second SL state, the resource selection mechanism m_current，2Is from the resource pool u_current，2Corresponding set of resource selection mechanisms (e.g., M)_current，2) Highest priority supported by the UE (e.g., in accordance with the "second resource selection mechanism priority order") of medium selection (e.g., random selection) "

The highest priority determined).

Further optionally, in step S207, based on the resource selection mechanism m_current，2And/or the resource pool u_current，2SL resource allocation mode 2 is performed.

Optionally, in the second embodiment of the present invention, when it is configured to be transmitted in SL communication and there is related data to be transmitted, the step S201 and/or the step S203 and/or the step S205 and/or the step S207 are executed.

Optionally, in the second embodiment of the present invention, when an operation related to SL resource allocation mode 2 needs to be performed (for example, when a transmission resource for one transport block needs to be selected, or when transmission resources for a plurality of transport blocks need to be selected), the step S201 and/or the step S203 and/or the step S205 and/or the step S207 are performed.

Optionally, in the second embodiment of the present invention, the step S201 and/or the step S203 and/or the step S205 and/or the step S207 are performed by an RRC layer protocol entity.

Optionally, in the second embodiment of the present invention, the step S201 and/or the step S203 and/or the step S205 and/or the step S207 are performed by a MAC layer protocol entity of the UE. Optionally, the MAC layer protocol entity of the UE performs the step S201 and/or the step S203 and/or the step S205 and/or the step S207 for each SL process (or SL HARQ process), respectively.

Optionally, in the second embodiment of the present invention, the random selection may be to randomly determine (or select) one element in one set in an equal probability manner.

Optionally, in the second embodiment of the present invention, the

May be a predefined or configured or preconfigured value, e.g.

In another example

Optionally, in the second embodiment of the present invention, a manner of configuring one logical channel to enable HARQ feedback may be to configure a value of the corresponding parameter sl-HARQ-feedback enabled-r16 as "enabled".

Optionally, in the second embodiment of the present invention, a manner of configuring one logical channel to disable HARQ feedback may be to configure a value of the corresponding parameter sl-HARQ-FeedbackEnabled-r16 as "disabled".

Optionally, in the second embodiment of the present invention, the "resource for transmitting HARQ feedback" is a PSFCH resource.

Thus, according to the second embodiment, the present invention provides a method, which enables resource allocation to be performed in a suitable resource pool according to a suitable resource selection mechanism in the SL resource allocation mode 2 by flexibly setting rules for determining the resource pool and the resource selection mechanism, thereby improving the performance of the SL resource allocation mode 2.

[ modified examples ]

As a modification, a user equipment capable of executing the method performed by the user equipment described in detail above of the present invention is explained below with reference to fig. 3.

Fig. 3 is a block diagram showing a user equipment UE according to the present invention.

As shown in fig. 3, the user equipment UE30 includes a processor 301 and a memory 302. The processor 301 may include, for example, a microprocessor, a microcontroller, an embedded processor, or the like. The memory 302 may include, for example, volatile memory (e.g., random access memory RAM), a Hard Disk Drive (HDD), non-volatile memory (e.g., flash memory), or other memory, etc. The memory 302 has stored thereon program instructions. Which when executed by the processor 301 may perform the above-described method performed by the user equipment as described in detail in the present invention.

The method of the invention and the apparatus involved have been described above in connection with preferred embodiments. It will be appreciated by those skilled in the art that the above illustrated approaches are exemplary only, and that the various embodiments described above can be combined with each other without conflict. The method of the present invention is not limited to the steps or sequence shown above. The network nodes and user equipment shown above may comprise further modules, e.g. modules that may be developed or developed in the future, available for a base station, AMF, UPF, MME, S-GW or UE, etc. The various identifiers shown above are exemplary only and not limiting, and the invention is not limited to the specific information elements that are examples of these identifiers. Many variations and modifications may occur to those skilled in the art in light of the teachings of the illustrated embodiments. It will be understood by those skilled in the art that some or all of the mathematical expressions or mathematical equations or mathematical inequalities may be simplified or transformed or rewritten to some extent, such as by combining constant terms, exchanging two additive terms, exchanging two multiplicative terms, shifting a term from the left to the right of an equation or inequality after changing the sign, shifting a term from the right to the left of an equation or inequality after changing the sign, and so on; simplifying or transforming or rewriting the mathematical expressions or mathematical equations or mathematical inequalities before and after may be considered equivalent.

It should be understood that the above-described embodiments of the present invention can be implemented by software, hardware, or a combination of both software and hardware. For example, various components within the base station and the user equipment in the above embodiments may be implemented by various means, including but not limited to: analog 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.

In the present invention, a "base station" may refer to a mobile communication data and/or control switching center having a certain transmission power and a certain coverage area, and for example, includes functions of resource allocation scheduling, data receiving and sending, and the like. "user equipment" may refer to a user mobile terminal, including, for example, a mobile phone, a notebook, etc., which may wirelessly communicate with a base station or a micro base station.

Furthermore, embodiments of the invention disclosed herein may be implemented on a computer program product. More specifically, the computer program product is one of the following: there is a computer readable medium having computer program logic encoded thereon that, when executed on a computing device, provides related operations for implementing the above-described aspects 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 embodiments of the present invention. Such arrangements of the invention are typically provided as downloadable software images, shared databases, etc. arranged or encoded in software, code and/or other data structures on a computer readable medium such as an optical medium (e.g., CD-ROM), floppy or hard disk or other medium such as firmware or microcode on one or more ROM or RAM or PROM chips or in one or more modules. The software or firmware or such configurations may be installed on a computing device to cause one or more processors in the computing device to perform the techniques described in embodiments of the present invention.

Further, each functional block or each feature of the base station device and the terminal device used in each of the above embodiments may be implemented or executed by a circuit, which is typically one or more integrated circuits. Circuitry 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, discrete gate or transistor logic, or discrete hardware components, or any combination thereof. A general-purpose processor may be a microprocessor, or the processor may be an existing processor, controller, microcontroller, or state machine. The general-purpose processor or each circuit described above may be configured by a digital circuit, or may be configured by a logic circuit. Further, when advanced technology capable of replacing the current integrated circuit is developed due to the advancement of semiconductor technology, the present invention can also use the integrated circuit obtained by the advanced technology.

Although the present invention has been described in conjunction with the preferred embodiments thereof, it will be understood by those skilled in the art that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention. Accordingly, the present invention should not be limited by the above-described embodiments, but should be defined by the appended claims and their equivalents.

Claims

1. A method performed by a user equipment, UE, comprising:

obtaining information related to SL resource allocation, wherein the information includes a resource pool set U_mode2. And the number of the first and second groups,

determining a resource selection mechanism m_current，1Wherein the resource selection mechanism m_current，1Is supported by the UE in the resource pool set U_mode2The highest priority resource selection mechanism of the one or more resource selection mechanisms configured in the at least one resource pool. And the number of the first and second groups,

determining a resource pool u_current，1Wherein the resource pool u_current，1Is in the resource pool set U_mode2Wherein the resource selection mechanism m is configured_current，1Any one of the resource pools of (1). And the number of the first and second groups,

based on the resource selection mechanism m_current，1And the resource pool u_current，1SL resource allocation mode 2 is performed.

2. The method of claim 1,

if the UE is in SL energy-saving state, the resource pool set U_mode2The resource selection mechanism configured in each resource pool in the pool may include one or more of partial sensing and random resource selection. And the number of the first and second groups,

if the UE is in a non-SL energy-saving state, the resource pool set U_mode2The resource selection mechanism configured in each resource pool in the pool may include one or more of full sensing, partial sensing, and random resource selection.

3. The method of claim 1,

if the UE is in the SL energy saving mode, the priority order corresponding to the priority may be partial sensing from the highest priority to the lowest priority, and random resource selection.

If the UE is in the non-SL energy saving mode, the priority order corresponding to the priority may be full sensing, partial sensing, and random resource selection from the highest priority to the lowest priority.

4. The method of claim 1,

the resource pool set U_mode2At least one resource pool in the resource selection mechanism set comprises full sensing.

5. A user equipment, comprising:

a processor; and

a memory having stored therein instructions that, when executed,

wherein the instructions, when executed by the processor, perform the method of any of claims 1-4.