WO2021088486A1 - Method executed by user equipment and user equipment - Google Patents

Abstract

Provided in the present invention is a method executed by user equipment, comprising: acquiring information related to second stage SCI, the second stage SCI and corresponding first stage SCI being sent by another UE; and processing the second stage SCI.

Description

Method executed by user equipment and user equipment Technical field

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

Background technique

NR SL operation can support "two-stage SCI" (two-stage SCI), in which the first stage SCI (1 ^st -stage SCI) can contain information such as resource reservation and/or allocation, which is convenient for all UEs that are monitoring the SL link Detecting resource reservation and/or allocation; the second-stage SCI (2 ^nd- stage SCI) may contain other information, such as information related to HARQ feedback. How to determine the size of the second stage SCI is a problem that needs to be solved in the second stage SCI design. When receiving SCI, how to efficiently and flexibly filter the undesired SCI (and the corresponding TB) is another problem that needs to be solved.

Prior Art Literature

Non-patent literature

Non-Patent Document 1: RP-152293, New WI proposal: 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

Summary of the invention

According to the present invention, a method executed by a user equipment is provided, which is characterized in that it includes: acquiring information related to the second-stage SCI; and processing the second-stage SCI. Wherein, the second stage SCI and the corresponding first stage SCI are sent by another UE.

Preferably, the information related to the second-stage SCI is at least one of predefined or configured or pre-configured or the size and format of the second-stage SCI indicated by the corresponding first-stage SCI.

Preferably, if the second-stage SCI meets the second-stage SCI processing conditions, the second-stage SCI processing operation is executed.

Preferably, the second stage SCI processing conditions include one or more of the following:

●Null condition (or "unconditional").

● The value of one reserved bit in the second stage SCI is 1.

● The value of multiple reserved bits in the second stage SCI is 1.

● The value of all reserved bits in the second stage SCI is 1.

● The value of one reserved bit in the second stage SCI is 0.

● The value of multiple reserved bits in the second stage SCI is 0.

● The value of all reserved bits in the second stage SCI is 0.

● The value of one stuffing bit in the second stage SCI is 1.

● The value of multiple stuffing bits in the second stage SCI is 1.

● The value of all padding bits in the second stage SCI is 1.

● The value of one stuffing bit in the second stage SCI is 0.

● There are multiple padding bits in the second stage SCI whose value is 0.

● The value of all padding bits in the second stage SCI is 0.

●c>x.

●c≥x.

● c=x.

●c≠x.

●c<x.

●c≤x.

●c>C.

●c≥C.

● c=C.

●c≠C.

●c<C.

●c≤C.

●c>P.

●c≥P.

● c=P.

●c≠P.

●c<P.

●c≤P.

Where x is the pre-filled size of the second stage SCI, C is the smallest value among the elements greater than or equal to x in a predefined or configured or pre-configured set, and P is a predefined or configured or pre-configured value.

Preferably, the second-stage SCI processing operation includes one or more of the following:

● Discard the second stage SCI.

● Discard the first stage SCI corresponding to the second stage SCI.

● Discard the physical direct control channel PSCCH that carries the first-stage SCI corresponding to the second-stage SCI.

● Discard the physical direct shared channel PSSCH carrying the second-stage SCI.

●Truncate the second stage SCI.

●Fill the second stage SCI.

Preferably, in the truncation operation, the size of the second stage SCI after truncation is x; and in the filling operation, the size of the second stage SCI after filling is C.

Wherein, x is the pre-filled size of the second stage SCI, and C is the smallest value among elements greater than or equal to x in a predefined or configured or pre-configured set.

In addition, according to the present invention, a method executed by a user equipment is provided, which is characterized by including: determining the size of the second-stage SCI; processing the second-stage SCI; and transmitting the second-stage SCI.

Preferably, the size of the second stage SCI is a pre-defined or configured or pre-configured value, or the smallest value among elements greater than or equal to x in a pre-defined or configured or pre-configured set.

Where, x is the size before filling of the second stage SCI.

Preferably, the method for processing the second stage SCI includes one or more of the following:

●Fill the second stage SCI.

●Truncate the second stage SCI.

● Discard the second stage SCI.

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

According to the present invention, by discarding, truncating, or filling the received second-stage SCI, even if the UE receiving the SCI and the UE sending the SCI have inconsistent understanding of the size of the second-stage SCI, both receiving and sending SCI There will be no ambiguity between them.

In addition, according to the present invention, by discarding or truncating or filling the second-stage SCI before sending it, even if the UE receiving the SCI and the UE transmitting the SCI have inconsistent understanding of the size of the second-stage SCI, the receiving and transmitting There will be no ambiguity between the two parties of the SCI.

In addition, according to the present invention, by filtering out all SL transmissions that do not require further processing according to flexible target SCI conditions when receiving SCI, the efficiency of UE receiving SL transmission is greatly improved.

Description of the drawings

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

Fig. 1 is a flowchart showing a method executed by a user equipment according to the first embodiment of the present invention.

Fig. 2 is a flowchart showing a method executed by a user equipment according to the second embodiment of the present invention.

Fig. 3 is a flowchart showing a method executed by a user equipment according to the third embodiment of the present invention.

Fig. 4 shows a block diagram of the user equipment UE involved in the present invention.

Detailed ways

The present invention will be described in detail below in conjunction with the drawings and specific implementations. 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 that are not directly related to the present invention are omitted to prevent confusion in the understanding of the present invention.

Hereinafter, taking the 5G mobile communication system and its subsequent evolved versions as an example application environment, multiple embodiments according to the present invention are described in detail. However, it should be pointed out that the present invention is not limited to the following embodiments, but is applicable to more other wireless communication systems, such as communication systems after 5G and 4G mobile communication systems before 5G.

The following describes some terms related to the present invention. Unless otherwise specified, the terms related to the present invention are defined here. The terminology given in the present invention may adopt different naming methods in LTE, LTE-Advanced, LTE-Advanced Pro, NR and later communication systems, but a unified terminology is used in the present invention. When applied to a specific system, It can be replaced with terms used in the corresponding system.

3GPP: 3rd Generation Partnership Project, the third generation partnership project

AS: Access Stratum, access layer

BWP: Bandwidth Part, Bandwidth Part

CA: Carrier Aggregation, carrier aggregation

CCE: control-channel element, control channel element

CORESET: control-resource set, control resource set

CP: Cyclic Prefix, cyclic prefix

CP-OFDM: Cyclic Prefix Orthogonal Frequency Division Multiplexing, Cyclic Prefix Orthogonal Frequency Division Multiplexing

CRB: Common Resource Block, common resource block

CRC: Cyclic Redundancy Check, cyclic redundancy check

CSI: Channel-state Information, channel state information

CSS: Common Search Space, public search space

DC: Dual Connectivity, dual connection

DCI: Downlink Control Information, downlink control information

DFN: Direct Frame Number, direct frame number

DFT-s-OFDM: Discrete Fourier Transformation Spread Orthogonal Frequency Division Multiplexing, Discrete Fourier Transform Spread Spectrum Orthogonal Frequency Division Multiplexing

DL: Downlink, down

DL-SCH: Downlink Shared Channel, downlink shared channel

DM-RS: Demodulation reference signal, demodulation reference signal

eMBB: Enhanced Mobile Broadband, enhanced mobile broadband communications

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

E-UTRAN: Evolved UMTS Terrestrial Radio Access Network, the evolved UMTS terrestrial radio access network

FDD: Frequency Division Duplex, Frequency Division Duplex

FDRA: Frequency Domain Resource Assignment, frequency domain resource allocation

FR1: Frequency Range 1, frequency range 1

FR2: Frequency Range 1, Frequency range 2

GLONASS: GLObal NAvigation Satellite System, Global Navigation Satellite System

gNB: NR Node B, NR Node B

GNSS: Global Navigation Satellite System, Global Navigation Satellite System

GPS: Global Positioning System, Global Positioning System

HARQ: Hybrid Automatic Repeat Request, hybrid automatic repeat request

ID: Identity (or Identifier), identity, identifier

IE: Information Element, information element

IP: Internet Protocol, Internet Protocol

LCID: Logical Channel ID, logical channel identifier

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

MCG: Master Cell Group, master cell group

MIB: Master Information Block, master information block

MIB-SL: Master Information Block-Sidelink, master information block-go straight

MIB-SL-V2X: Master Information Block-Sidelink-V2X, master information block-straight-go-V2X

MIB-V2X: Master Information Block-V2X, Master Information Block-V2X

mMTC: massive Machine Type Communication, large-scale machine type communication

NAS: Non-Access-Stratum, non-access layer

NDI: New Data Indicator, new data indicator

NR: New Radio, New Radio

NUL: Normal Uplink, normal uplink

OFDM: Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing

PBCH: Physical Broadcast Channel, physical broadcast channel

PDCCH: Physical Downlink Control Channel, physical downlink control channel

PDCP: Packet Data Convergence Protocol, packet data convergence protocol

PDSCH: Physical Downlink Shared Channel, physical downlink shared channel

PSBCH: Physical Sidelink Broadcast Channel, physical direct broadcast channel

PSCCH: Physical Sidelink Control Channel, physical direct control channel

PSFCH: Physical Sidelink Feedback Channel, physical direct feedback channel

PSSCH: Physical Sidelink Shared Channel, physical direct shared channel

PRB: Physical Resource Block, physical resource block

PSS: Primary Synchronization Signal, the primary synchronization signal

PSS-SL: Primary Synchronization Signal for Sidelink, direct main synchronization signal

PSSS: Primary Sidelink Synchronization Signal, main straight line synchronization signal

PTAG: Primary Timing Advance Group, the main timing advance group

PUSCH: Physical uplink shared channel, physical uplink shared channel

PUCCH: Physical uplink control channel, physical uplink control channel

QCL: Quasi co-location, quasi co-location

QoS: Quality of Service, quality of service

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

RAR: Random Access Response, Random Access Response

RB: Resource Block, resource block

RE: Resource Element, resource element

REG: resource-element group, resource element group

RF: Radio Frequency, radio frequency

RLC: Radio Link Control, radio link control protocol

RNTI: Radio-Network Temporary Identifier, wireless network temporary identifier

RRC: Radio Resource Control, radio resource control

RV: Redundancy Version, redundant version

S-BWP: Sidelink Bandwidth Part, straight bandwidth segment

S-MIB: Sidelink Master Information Block, go straight to the master information block

S-PSS: Sidelink Primary Synchronization Signal, direct main synchronization signal

S-SSB: Sidelink SS/PBCH block, direct synchronization signal/physical broadcast channel block

S-SSS: Sidelink Secondary Synchronization Signal, direct-travel secondary synchronization signal

SCG: Secondary Cell Group, secondary cell group

SCI: Sidelink Control Information, direct control information

SCS: Subcarrier Spacing, subcarrier spacing

SDAP: Service Data Adaptation Protocol, service data adaptation protocol

SFN: System Frame Number, system frame number

SIB: System Information Block, system information block

SL: Sidelink, go straight

SL BWP: Sidelink Bandwidth Part, straight bandwidth segment

SL MIB: Sidelink Master Information Block, go straight to the master information block

SL PSS: Sidelink Primary Synchronization Signal, direct main synchronization signal

SL SS: Sidelink Synchronization Signal, direct synchronization signal

SL SSID: Sidelink Synchronization Signal Identity (or Sidelink Synchronization Signal Identifier), direct synchronization signal identification

SL SSB: Sidelink SS/PBCH block, direct synchronization signal/physical broadcast channel block

SL SSS: Sidelink Secondary Synchronization Signal, direct-travel secondary synchronization signal

SLSS: Sidelink Synchronization Signal, direct synchronization signal

SLSS ID: Sidelink Synchronization Signal Identity (or Sidelink Synchronization Signal Identifier), direct synchronization signal identification

SLSSID: Sidelink Synchronization Signal Identity (or Sidelink Synchronization Signal Identifier), direct synchronization signal identification

SpCell: Special Cell, special cell

SRS: Sounding Reference Signal, sounding reference signal

SSB: SS/PBCH block, synchronization signal/physical broadcast channel block

SSB-SL: SS/PBCH block for Sidelink, direct synchronization 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, direct synchronization signal/physical broadcast channel block

SSSS: Secondary Sidelink Synchronization Signal, auxiliary direct synchronization signal

STAG: Secondary Timing Advance Group, secondary timing advance group

SUL: Supplementary Uplink, supplementary uplink

TA: Timing Advance, timing advance

TAG: Timing Advance Group, timing advance group

TB: Transport Block, transport block

TCP: Transmission Control Protocol, Transmission Control Protocol

TDD: Time Division Duplex, time division duplex

TPC: Transmit power control, transmission power control

UE: User Equipment, user equipment

UL: Uplink, uplink

UMTS: Universal Mobile Telecommunications System, Universal Mobile Telecommunications System

URLLC: Ultra-Reliable and Low Latency Communication, ultra-reliable and low latency communication

USS: UE-specific Search Space, UE-specific search space

V2I: Vehicle-to-Infrastructure, vehicle to infrastructure

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

V2P: Vehicle-to-Pedestrian, vehicle to pedestrian

V2V: Vehicle-to-vehicle, vehicle-to-vehicle

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

VRB: Virtual Resource Block, virtual resource block

In the communication based on D2D (Device to Device) technology, the interface between devices (also called User Equipment, UE) can be called PC5 interface, and the corresponding transmission link can be called at the physical layer. It is a "straight" or "sidelink" (SL) link, which is used to distinguish between an uplink (UL) link and a downlink (DL) link. Communication based on the SL link can be called SL communication (sidelink communication). The SL link and the corresponding SL communication can be based on LTE technology (hereinafter referred to as LTE SL) or NR technology (hereinafter referred to as NR SL). 5G V2X communication can be based on LTE SL or NR SL. Unless otherwise specified below, "SL" refers to NR SL.

The physical layer of the SL interface can support one or more modes in one or more of the in-coverage, out-of-coverage, and partial-coverage scenarios For example, broadcast transmission, groupcast transmission, unicast transmission, and so on.

For FR1 (Frequency Range 1, frequency range 1), the SCS (subcarrier spacing, subcarrier spacing, denoted as Δf, in kHz) corresponding to the SL link can be 15kHz (normal CP), or 30kHz (normal CP), or 60kHz (normal CP or extended CP); for FR2 (Frequency Range 2, frequency range 2), the SCS corresponding to the SL link can be 60kHz (normal CP or extended CP), or 120kHz (normal CP). Each SCS corresponds to a SCS configuration (SCS configuration, denoted as μ), for example, Δf=15kHz corresponds to μ=0, Δf=30kHz corresponds to μ=1, Δf=60kHz corresponds to μ=2, Δf=120kHz corresponds to μ=3 , Etc.; another example, for any given μ, Δf = 2 ^μ · 15kHz. 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 also be the SCS configuration of the SL BWP; for example, all SL transmissions in one SL BWP use the same SCS configuration and/or the same CP. μ may also be the SCS configuration of a resource pool; for example, all SL transmissions in a resource pool use the same SCS configuration and/or the same CP.

The signals and channels related to SL operation may include:

●SL PSS (Sidelink Primary Synchronization Signal), or S-PSS, or SPSS, or SL-PSS, or PSS-SL, or PSSS (Primary Sidelink Synchronization Signal) , Main straight sync signal), etc.

●SL SSS (Sidelink Secondary Synchronization Signal), or S-SSS, or SSSS (Sidelink Secondary Synchronization Signal), or SL-SSS, or SSS-SL, or SSSS (Secondary Sidelink Synchronization Signal), etc.

●PSBCH (Physical Sidelink Broadcast Channel, physical direct broadcast channel).

●PSCCH (Physical Sidelink Control Channel).

●PSSCH (Physical Sidelink Shared Channel, physical direct shared channel).

●PSFCH (Physical Sidelink Feedback Channel, physical direct feedback channel).

SL PSS, SL SSS, and PSBCH can be organized into blocks on time-frequency resources, for example, called SL SSB (Sidelink Synchronization Signal/PSBCH block, or SSS/PSBCH block, direct synchronization signal/physical direct broadcast channel block) , Or called SSS/PSBCH block, or S-SSB, or SSSB, or SL-SSB, or SSB-SL. The transmission bandwidth of the SL SSB (for example, 11 resource blocks) is located in the SL BWP (Sidelink Bandwidth Part) configured for the UE, or S-BWP, or SBWP, or SL-BWP, or Referred to as BWP-SL). SL PSS and/or SL SSS can carry SL SSID (Sidelink Synchronization Identity, or Sidelink Synchronization Identifier), or Sidelink Synchronization Signal Identity, or Sidelink Synchronization Signal Identity, or Sidelink Synchronization Signal Identity, or SL-SSID, or SL-SSID Called SSID-SL, or SLSSID, or SLSS ID, or S-SSID, etc.), PSBCH can carry SL MIB (Sidelink Master Information Block), or SL-MIB , Or S-MIB, or MIB-SL, or MIB-SL-V2X). The SL MIB may contain the configuration information of the SL link, for example, related to the direct frame number or the direct half frame number or the direct subframe number or the direct time slot number where the PSBCH (or the corresponding SL SSB) carrying the SL MIB is located. information.

Sometimes, when referring to the SL SSB (for example, the time domain and/or frequency resources of the SL SSB configured through the configuration information of the SL link), it refers to a candidate SL SSB or an SL SSB candidate. On the time domain and/or frequency domain resources corresponding to a candidate SL SSB, there may be one or more SL SSB transmissions (for example, from different UEs), or there may not be any SL SSB transmission.

The synchronization source related to SL synchronization (synchronization source, or synchronization reference, or synchronization reference source, or synchronization reference source) may include GNSS (Global Navigation Satellite System), gNB, eNB, and UE (for example, NR UE, LTE UE, NR UE or LTE UE). A UE serving as a synchronization source (for example, a UE that transmits SL SSB) may also be referred to as SyncRef UE.

Resource allocation methods related to SL operations can be classified as follows:

●Mode 1: The base station schedules SL resources for SL transmission.

● Mode 2: The UE determines the SL resources for SL transmission (that is, the base station does not participate in the scheduling of SL resources). For example, the UE performing the SL transmission operation autonomously determines the SL resources for SL transmission.

The UE can schedule data transmission through SCI (Sidelink Control Information). The following are some examples of information that can be included in the SCI:

●Source Layer-1 ID (Source Layer-1 ID, or Layer-1 Source ID, or Physical Layer Source ID, or Physical Layer Source ID).

●Destination Layer-1 ID (Destination Layer-1 ID, or Layer-1 Destination ID, or Physical Layer Destination ID, or Physical Layer Destination ID).

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

●New Data Indicator (NDI).

● Redundancy Version (Redundancy Version, RV).

SL operation can support "two-stage SCI" (two-stage SCI), in which the first stage SCI (1 ^st -stage SCI) can contain information such as resource reservation and/or resource allocation, so that all monitoring (monitor) SL The UE of the link detects the resource reservation and/or resource allocation; the second-stage SCI (2 ^nd- stage SCI) can contain other information, such as information related to HARQ feedback, and the second-stage SCI The size of the second stage SCI format, and so on. This design makes the second-stage SCI have strong forward compatibility. For example, the design of the second-stage SCI can be continuously enhanced in subsequent standard versions (such as introducing new fields, etc.).

Each second-stage SCI has a corresponding first-stage SCI. Conversely, there are two possible designs: the first may be that each first-stage SCI has a corresponding second-stage SCI; the second may be a first-stage SCI in some cases (for example, for broadcast transmission) There is no corresponding second-stage SCI, and in other cases, each first-stage SCI has a corresponding second-stage SCI. If not specifically stated below, when SCI is mentioned, it includes the first-stage SCI and the corresponding second-stage SCI (if the second-stage SCI appears).

The first stage SCI in the SCI and the corresponding second stage SCI (if the second stage SCI appears) can be carried by the same SL transmission. Wherein, the SL transmission may include one PSCCH transmission and/or one PSSCH transmission. For example, the first stage SCI is carried on the PSCCH, and the second stage SCI is multiplexed with the data to be transmitted on the PSSCH. The PSCCH and PSSCH may be multiplexed on the time domain and/or frequency domain resources allocated for the SL transmission in a certain manner. In addition, it can be considered that the first stage SCI and/or the second stage SCI schedules the corresponding PSSCH (or schedules the transmission of the corresponding PSSCH, or schedules the transmission of the TB carried in the corresponding PSSCH).

One or more "formats" can be defined for the first stage SCI and the second stage SCI respectively. An actually used SCI (for example, an SCI that is to be constructed or is being constructed for transmission over the air interface, another example is the SCI being transmitted over the air interface, another example is the SCI being received or has been received) can be called an SCI instance (instance). An SCI instance corresponds to a specific first-stage SCI format and a specific second-stage SCI format (if second-stage SCI is present). If not specifically stated below, when referring to "SCI format", it can refer to either the first stage SCI format or the second stage SCI format.

One or more fields can be defined in each SCI format, and each field occupies one or more bits. Each SCI format can have one or more fields that are conditionally presented. Whether a conditionally appearing field appears in an SCI instance can be determined by one or more conditions, such as one or more configuration information or pre-configuration information, as indicated by the first stage of SCI (where applicable, For example, for the conditional field in the second stage SCI format).

One or more "reserved" bits may be defined in an SCI format, so as to facilitate subsequent expansion and/or evolution of the standard version to utilize this or these bits. For example, a special field called "reserved information bits" (Reserved information bits) can be defined at the end of the SCI format. The combination of the values of all reserved bits may correspond to a predefined or configured or pre-configured bit pattern (for example, the value of all reserved bits is 0, and the value of all reserved bits is 1). The length of the reserved bits can be specified explicitly (for example, 2 bits) or implicitly (for example, the reserved bits are added until the size of the second stage SCI is equal to 32 bits).

The above "adding reserved bits until the size of the second stage SCI is equal to 32 bits" can be regarded as an example of a "padding" operation (in this case, the corresponding reserved bits can also be referred to as "padding bits"). The filling operation defined in a broader sense can be adjusted by adding additional filling bits to the filling target (for example, the first stage SCI and the second stage SCI) to adjust the size of the filling target (for example, making different filling targets have the same The size, for example, makes different filling targets have different sizes, or for aligning the size of the filling targets to a predefined or configured or pre-configured value, etc.) to achieve a specific purpose (such as controlling multiple filling targets In order to reduce the blind detection complexity of the receiving UE, another example is to quantify the size of the padding target to one of several predefined or configured or pre-configured values so that the receiving UE can determine the size of the padding target, etc.) .

According to the content of padding, padding can be defined as "zero-padding", that is, the value of all padding bits is 0, or it can be defined as "1 padding" (one-padding), that is, all padding The values of the bits are all 1, which can also be defined as filling according to other bit patterns.

Divided according to the filling position, the filling method can include one or more of the following:

●Generate zero or one or more padding bits, and fill the padding bits into a field used to place padding bits in the padding target (for example, the first stage SCI, or the second stage SCI), for example, a field called The "Padding bits" (Padding bits) field is also the "Reserved Information Bits" field mentioned above. among them,

◆ Optionally, the field used to place the padding bits may be the last field or not the last field in the corresponding padding target.

● Add zero or one or more padding bits at the end (for example, after the last bit of the last field) of the padding target (for example, the first stage SCI, and also like the second stage SCI).

●Insert zero or one or more padding bits at the top (for example, before the first bit of the first field) of the padding target (such as the first stage SCI, and also like the second stage SCI).

As a special case, after the padding operation is performed, the number of padding bits can be equal to zero. Sometimes it is considered that the "filling" does not correspond to any operation at this time, or the "filling" corresponds to a null operation.

For an SCI instance, the filled size of the SCI at the first stage may be greater than or equal to the size before filling, and the filled size of the SCI at the second stage may be greater than or equal to the size before filling. Sometimes the "filled size" can also be referred to as "actual size" or "size", such as "the size of the SCI", or "the size of the first stage SCI", or "the size of the first stage". The size of the second stage SCI". "Padded size" does not mean that the actual padding operation must be performed, nor does it mean that the number of padding bits must be greater than 0.

With the continuous evolution of the NR SL standard, each SCI format may continue to introduce new fields in subsequent standard versions to support new functions. This makes it possible for UEs that support different standard versions to understand the size of the SCI format. Different. How to enable a UE that supports a low (high) standard version to correctly handle the SCI transmitted by a UE that supports a high (low) standard version is a problem that needs to be solved.

In addition, when the UE receives the SCI transmitted by other UEs, it may only be interested in part of the received SCI (and the corresponding TB). How to define filter conditions so that the UE can filter the undesired SCI (and corresponding TB) efficiently and flexibly is another problem that needs to be solved.

In all the examples and implementations of the present invention, if not specifically stated:

● Optionally, where applicable, "send" can be replaced with "transmit".

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

● Optionally, "pre-configuration" can be pre-configuration through higher layer protocol/signaling.

● Optionally, "configuration" can be configured through higher layer protocol/signaling.

[Example 1]

The method executed by the user equipment in the first embodiment of the present invention will be described below with reference to FIG. 1.

Fig. 1 is a flowchart showing a method executed by a user equipment according to the first embodiment of the present invention.

As shown in FIG. 1, in the first embodiment of the present invention, the steps performed by the user equipment UE (also referred to as receiving UE, or RX UE in the first embodiment of the present invention) include: step S101 and step S103.

Specifically, in step S101, information related to the second stage SCI is acquired. For example, information related to the second stage SCI corresponding to the received first stage SCI is acquired.

among them,

● Optionally, the second stage SCI and the first stage SCI are sent by another UE (also referred to as the sending UE, or TX UE in the first embodiment of the present invention).

● Optionally, the "information related to the second-stage SCI" includes one or more of the following:

◆The size of the second stage SCI.

◆The format of the second stage SCI.

● Optionally, the "information related to the second stage SCI" is predefined information.

● Optionally, the "information related to the second-stage SCI" is configured or pre-configured information.

● Optionally, the "information related to the second-stage SCI" is information indicated by the first-stage SCI. among them,

◆ Optionally, one field in the first-stage SCI indicates the format of the second-stage SCI, or multiple fields in the first-stage SCI jointly indicate the format of the second-stage SCI.

◆ Optionally, one field in the first-stage SCI indicates the size of the second-stage SCI, or multiple fields in the first-stage SCI jointly indicate the size of the second-stage SCI.

◆ Optionally, one field in the first stage SCI indicates the size and format of the second stage SCI, or multiple fields in the first stage SCI jointly indicate the size and format of the second stage SCI format.

For example, a field in the first stage SCI (for example, referred to as "the format of the second stage SCI") is used to indicate the format of the second stage SCI.

As another example, a field of the first stage of SCI (e.g., referred to as "the size of the second phase of SCI ') to a set value S ₁ indicating a size of the second phase of SCI. among them,

○ Optionally, the set S ₁ is a predefined set.

○ Optionally, the set S ₁ is a configured or pre-configured set.

○ Optionally, the set S ₁ is a subset of the set S, where,

◇ Optionally, the set S is a predefined or configured or pre-configured set.

◇ Optionally, the unit of the elements in the set S is bits.

○ Optionally, the _{size of the set S 1} is a predefined value.

○ Optionally, the _{size of the set S 1} is a variable value. At this time, the _{size of the set S 1} is always smaller than (or, smaller than or equal to) a predefined or configured or pre-configured value.

○ Optionally, the unit of the elements in _{the set S 1 is bit.}

For example, S ₁ = {32, 36, 40, 44}, where 32, 36, 40, and 44 correspond to the values 0, 1, 2 and 3 of the "size of the second stage SCI" field, respectively.

In addition, in step S103, the second stage SCI is processed.

among them,

● Optionally, part or all of the operations involved in processing the second-stage SCI can be performed before decoding (or attempting to decode) the second-stage SCI.

● Optionally, part or all of the operations involved in processing the second-stage SCI can be performed after decoding (or trying to decode) the second-stage SCI.

For example, one or more "second-stage SCI processing conditions" can be pre-defined or configured or pre-configured, and a corresponding "second-stage SCI processing condition" can be pre-defined or configured or pre-configured for each of them. Stage SCI processing operation"; for each of the "second stage SCI processing conditions" (denoted as I), if the second stage SCI satisfies I, execute the "second stage SCI processing operation corresponding to I" ". among them,

● Optionally, each of the "second-stage SCI processing conditions" can be individually pre-defined or configured or pre-configured.

● Optionally, each of the "second-stage SCI processing operations" can be individually pre-defined or configured or pre-configured.

● Optionally, each of the "second-stage SCI processing conditions" may include one or more of the following (any combination of "and" or "or" when applicable):

◆Null condition (or "unconditional").

◆The value of one reserved bit in the second stage SCI is 1.

◆The value of multiple reserved bits in the second stage SCI is 1.

◆The value of all reserved bits in the second stage SCI is 1.

◆The value of one reserved bit in the second stage SCI is 0.

◆ The value of multiple reserved bits in the second stage SCI is 0.

◆The value of all reserved bits in the second stage SCI is 0.

◆The value of one stuffing bit in the second stage SCI is 1.

◆ The value of multiple stuffing bits in the second stage SCI is 1.

◆The value of all padding bits in the second stage SCI is 1.

◆ The value of one stuffing bit in the second stage SCI is 0.

◆ The value of multiple stuffing bits in the second stage SCI is 0.

◆The value of all padding bits in the second stage SCI is 0.

◆c>x.

◆c≥x.

◆c=x.

◆c≠x.

◆c<x.

◆c≤x.

◆c>C.

◆c≥C.

◆c=C.

◆c≠C.

◆c＜C.

◆c≤C.

◆c>P.

◆c≥P.

◆c=P.

◆c≠P.

◆c＜P.

◆c≤P.

among them,

◆ Optionally, the one or more "second-stage SCI processing conditions" and their respective corresponding "second-stage SCI processing operations" have a certain processing sequence. Optionally, after determining the first “second-stage SCI processing condition” that is satisfied, execute its corresponding “second-stage SCI processing operation”, and combine the obtained result (for example, the second-stage SCI processing operation after the operation). The second-stage SCI) is used as the input for the next processing (for example, to determine whether the next "second-stage SCI processing condition" is satisfied, and if so, to execute its corresponding "second-stage SCI processing operation"), and so on.

◆ Optionally, the "empty condition" can always be met, regardless of the size, format, and content of the second stage SCI. For example, if a “second-stage SCI processing condition” is an “empty condition”, the receiving UE always executes the “second-stage SCI processing operation” corresponding to the “second-stage SCI processing condition”.

◆ Optionally, an item related to the content of the second-stage SCI (for example, "the value of a reserved bit in the second-stage SCI is 1") may be that the receiving UE is in accordance with the determined first It was determined when the second-stage SCI format was interpreted (interpreted). For example, one reason for satisfying "the value of a reserved bit in the second stage SCI is 1" may be that the length of the reserved bit in the second stage SCI format determined by the receiving UE is greater than that determined by the sending UE The length of the reserved bits in the SCI format in the second stage (for example, because the standard version supported by the receiving UE is lower than the standard version supported by the sending UE).

◆ Optionally, c is the size of the second-stage SCI that is predefined or configured or pre-configured or indicated in the "information related to the second-stage SCI". among them,

○ Optionally, if c is determined in a pre-defined or configured or pre-configured manner, the receiving UE may determine the value of c before receiving the first stage SCI.

○ Optionally, if c is indicated by the first stage SCI, the receiving UE determines the value of c after receiving the first stage SCI.

○ Optionally, the unit of c is bit.

◆ Optionally, x is the pre-filling size of the second stage SCI determined (for example, calculated, or derived, or obtained) by the receiving UE. For example, the receiving UE determines the format of the corresponding second-stage SCI and each field present in the format through the first-stage SCI and/or other information, and then determines the corresponding second-stage SCI The size before filling.

○ Optionally, the pre-padding size of the second-stage SCI determined by the sending UE (for example, calculation, derivation, or acquisition) may be greater than x, may be equal to x, or may be less than x. For example, if the standard version supported by the sending UE is lower than the standard version supported by the receiving UE, the set of fields in the second stage SCI format on which the sending UE is based may be the same as the one on which the receiving UE is based. A subset of the set of fields in the second-stage SCI format, resulting in that the pre-padding size of the second-stage SCI determined by the sending UE is smaller than x.

○ Optionally, the unit of x is bits.

◆ Optionally, C may be the padded size of the second stage SCI determined (for example, calculated, or derived, or obtained) by the receiving UE. For example, after determining x, the receiving UE determines the corresponding reserved and/or padding bits of the second-stage SCI format (if there are reserved and/or padding bits) through pre-defined or configured or pre-configured methods, and then determines The filled size of the corresponding second stage SCI.

○ Optionally, C may be greater than c, may also be equal to c, or may be less than c. For example, if the standard version supported by the sending UE is lower than the standard version supported by the receiving UE, the pre-padding size of the second stage SCI determined by the sending UE may be less than x, and accordingly, the sending UE determines The padded size of the second stage SCI (ie c, for example, when c is indicated by the first stage SCI) may be smaller than the padded size of the second stage SCI determined by the receiving UE (ie C), or it may Equal to C.

○ Optionally, C is a predefined value, or a configured or pre-configured value.

◇ Optionally, if c is determined by a pre-defined or configured or pre-configured manner, then c and C may be based on the same pre-defined or come from the same configuration or pre-configured parameters.

◇ Optionally, a value of C is pre-defined or configured or pre-configured for each second-stage SCI format.

○ Optionally, C can be determined in any of the following ways:

◇ C is a minimum value in the set S ₁ is greater than or equal to x elements.

◇ C S ₁ is greater than the set minimum value of the elements of x.

◇ C is the set S ₁ is less than or equal to the maximum value in the element x.

◇ C is less than the set S ₁ of the maximum element in x.

○ Optionally, the unit of C is bit.

◆ Optionally, P is a predefined value, or a configured or pre-configured value. among them,

○ Optionally, the value set of P is the set S ₁ .

○ Optionally, a value of C is pre-defined or configured or pre-configured for each second-stage SCI format.

○ Optionally, the unit of P is bits.

For example, a "second-stage SCI processing condition" can be "the value of one reserved bit in the second-stage SCI is 1" and "the value of multiple reserved bits in the second-stage SCI is 1" press "or" The result of the method combination, that is, "the value of one or more reserved bits in the second stage SCI is 1".

For another example, a "second-stage SCI processing condition" can be "the value of a reserved bit in the second-stage SCI is 1" and "the value of a stuffing bit in the second-stage SCI is 1" press "or" The result of the method combination, that is, "the value of one reserved bit or stuffing bit in the second stage SCI is 1".

● Optionally, the "second-stage SCI processing operation" includes one or more of the following (combined in any order where applicable):

◆No operation (or no operation).

◆Drop the second stage SCI.

◆ Discard the first stage SCI.

◆ Discard the PSCCH.

◆ Discard the PSSCH.

◆Truncate the second stage SCI. among them,

○ Optionally, the size of the second stage SCI after truncation is x.

○ Optionally, the size of the second stage SCI after truncation is C.

○ Optionally, the size of the second stage SCI after truncation is P.

○ Optionally, the size of the second stage SCI after truncation is a predefined or configured or pre-configured value.

◆Pad the second stage SCI. among them,

○ Optionally, the size of the second stage SCI after filling is x.

○ Optionally, the size of the second stage SCI after filling is C.

○ Optionally, the size of the second stage SCI after filling is P.

○ Optionally, the size of the second stage SCI after filling is a pre-defined or configured or pre-configured value.

○ Optionally, the stuffing bits of the second stage SCI after filling include the stuffing bits of the second stage SCI before the filling operation is performed and the stuffing bits generated in the filling operation.

◆ Interpret the second-stage SCI according to the determined second-stage SCI format. Among them, when two or more of the above operations are combined, the result of the first operation is the input of the second operation, and the result of the second operation is the input of the third operation (if any) Enter, and so on. For example, perform a truncation operation on the second stage SCI to make its size x, and then perform a padding operation on the second stage SCI after the truncation to make its size C.

For example, if c>C, then discard the second stage SCI, and optionally, the first stage SCI.

For another example, if c<C, fill the second-stage SCI to make the size C, and interpret the second-stage SCI according to the determined second-stage SCI format.

For another example, if c=C, the second-stage SCI is interpreted according to the determined second-stage SCI format.

For another example, if c>x, discard the second stage SCI, and optionally, the first stage SCI.

For another example, if c<x, fill the second-stage SCI to make the size x, and interpret the second-stage SCI according to the determined second-stage SCI format.

For another example, if c=x, the second-stage SCI is interpreted according to the determined second-stage SCI format.

For another example, if c<C, then fill the second stage SCI to make its size C; if the value of one or more padding bits in the second stage SCI after filling is 1, then discard the second Stage SCI; if the value of all padding bits in the second stage SCI after filling is 0, the second stage SCI is interpreted according to the determined second stage SCI format.

For another example, if c>C, and the value of one or more padding bits of the second-stage SCI is 1, the second-stage SCI is discarded.

If c>C, and the value of all padding bits in the second-stage SCI is 0, the second-stage SCI is interpreted according to the determined second-stage SCI format.

In this way, according to the first embodiment, the present invention provides a method for discarding, truncating, or filling the received second-stage SCI, so that even if the UE receiving the SCI and the UE transmitting the SCI are The understanding of the size of SCI is inconsistent, and there will be no ambiguity between the two parties receiving and transmitting SCI.

[Example 2]

The method executed by the user equipment in the second embodiment of the present invention will be described below with reference to FIG. 2.

Fig. 2 is a flowchart showing a method executed by a user equipment according to the second embodiment of the present invention.

As shown in Figure 2, in the second embodiment of the present invention, the steps performed by the user equipment UE (also referred to as transmitting UE or TX UE in the second embodiment of the present invention) include: step S201, step S203, and, Optional step S205.

Specifically, in step S201, the size of the second stage SCI is determined (denoted as c).

For example, determine c in any of the following ways:

● c is a predefined value.

● c is a configured or pre-configured parameter. among them,

◆ Optionally, the value set of c is the set S ₁ .

● c set S ₁ is greater than or equal to the minimum of the element x.

● c is the smallest element in the set S ₁ is greater than x.

● c is set equal to or less than the maximum value of the elements of x in ₁ S.

● c is set smaller than the maximum value S ₁ of the element x.

among them,

● Optionally, x is the pre-filled size of the second stage SCI.

● Optionally, the set S ₁ is a predefined set.

● Optionally, the set S ₁ is a configured or pre-configured set.

● Optionally, the set S ₁ is a subset of the set S, where the set S is a predefined or configured or pre-configured set.

● Optionally, the _{size of the set S 1} is a predefined value.

● Optionally, the _{size of the set S 1} is a variable value. At this time, the _{size of the set S 1} is always less than (or, less than or equal to) a predefined value.

● Optionally, the unit of c is bit.

● Optionally, the unit of x is bit.

● Optionally, the unit of the elements in _{the set S 1 is bit.}

● Optionally, the unit of the elements in the set S is bit.

In addition, in step S203, the second stage SCI is processed.

For example, optionally, perform one or more of the following (where applicable):

●Fill the second stage SCI. among them,

◆ Optionally, the second stage SCI is filled only when c>x.

◆ Optionally, the size of the second stage SCI after filling is c.

◆ Optionally, the size of the second stage SCI after filling is a predefined or configured or pre-configured value.

●Truncate the second stage SCI. among them,

◆ Optionally, the second stage SCI is truncated only when c<x.

◆ Optionally, the size of the second stage SCI after truncation is c.

◆ Optionally, the size of the second stage SCI after truncation is a predefined or configured or pre-configured value.

● Discard the second stage SCI. among them,

◆ Optionally, discard the second-stage SCI only when c<x.

In addition, optionally, in step S205, the second stage SCI is transmitted.

among them,

● Optionally, step S205 is executed only when the second-stage SCI is not discarded in step S203.

● Optionally, one or more fields in the first stage SCI are used to indicate the value of c. For example, S ₁ = {32, 36, 40, 44}, a 2-bit field in the first stage SCI (for example, called "second stage SCI size") has values 0, 1, 2 and 3 They are used to indicate the set S ₁ 32,36,40 and 44.

In this way, according to the second embodiment, the present invention provides a method for discarding, truncating, or filling the second-stage SCI before sending it, so that even the UE receiving the SCI and the UE transmitting the SCI can contact the second-stage SCI. The understanding of the size of the stage SCI is inconsistent, and there will be no ambiguity between the two parties receiving and transmitting the SCI.

[Example Three]

The method executed by the user equipment in the third embodiment of the present invention will be described below with reference to FIG. 3.

Fig. 3 is a flowchart showing a method executed by a user equipment according to the third embodiment of the present invention.

As shown in FIG. 3, in the third embodiment of the present invention, the steps performed by the user equipment UE include: step S301 and step S303.

Specifically, in step S301, the SCI is received.

among them,

● Optionally, the SCI refers to the first stage SCI.

● Optionally, the SCI refers to the second stage SCI.

● Optionally, the SCI refers to the first stage SCI and the second stage SCI.

In addition, in step S303, it is determined whether the SCI is the target SCI. For example, if the SCI satisfies one (or at least one, or more) target SCI conditions in the target SCI condition set, then the SCI is the target SCI.

among them,

● Optionally, the set of target SCI conditions includes one or more target SCI conditions.

● Optionally, part or all of the target SCI conditions in the target SCI condition set can be determined in a predefined manner.

● Optionally, part or all of the target SCI conditions in the target SCI condition set can be determined through configuration or pre-configuration.

● Optionally, part or all of the target SCI conditions in the target SCI condition set can be submitted or reported or instructed by one protocol layer (or protocol sublayer) A to another protocol layer (or protocol sublayer) B. among them,

◆ Optionally, the protocol layer (or protocol sublayer) A can be the lower layer of the protocol layer (or protocol sublayer) B, or the protocol layer (or protocol sublayer) B The higher layer (or upper layer).

◆ Optionally, any one of the protocol layer (or protocol sublayer) A and the protocol layer (or protocol sublayer) B can be any one of the following (where applicable):

○Physical layer (or PHY layer, or PHY sublayer).

○MAC layer (or MAC sublayer).

○ RLC layer (or RLC sublayer).

○PDCP layer (or PDCP sublayer).

○ SDAP layer (or SDAP sublayer).

○ RRC layer.

○PC5 RRC layer.

○PC5-S layer.

○AS layer.

○NAS layer.

○V2X layer.

○ Application layer.

○V2X application layer.

● Optionally, any one of the target SCI conditions in the set of target SCI conditions can be predefined or configured or pre-configured in any of the following ways:

◆The destination layer one identifier (Destination Layer-1 ID, or Layer-1 Destination ID, or Physical Layer Destination ID, or Physical Layer Destination ID) indicated by the SCI is equal to dst _{L1 , 0} .

◆ The target layer one identifier indicated by the SCI is equal to dst _L1 , 0, and the source layer one identifier (Source Layer-1 ID, or Layer-1 Source ID) indicated by the SCI, Or called Physical Layer Source ID, physical layer source identifier) is equal to src _L1,0 .

◆ The target layer one identifier indicated by the SCI is equal to dst _L1,0 , and the cast type indicated by the SCI is cast ₀ .

◆ The target layer one identifier indicated by the SCI is equal to dst _L1,0 , and the source layer one identifier indicated by the SCI is equal to src _L1,0 , and the propagation type indicated by the SCI is cast ₀ .

◆ The source layer one identifier indicated by the SCI is equal to src _L1,0 , and the propagation type indicated by the SCI is cast ₀ .

◆The transmission type indicated by the SCI is cast ₀ .

among them,

◆ Optionally, _{the length of dst L1} , 0 can be 16 bits.

◆ Optionally, dst _L1,0 can be determined by a destination layer-2 identifier (Destination Layer-2 ID, or Layer-2 Destination ID) configured by the UE; for example, dst _{L1 , 0} may be a part of the bits of the target layer two identifier (for example, the lowest 16 bits, the lowest 8 bits, the highest 16 bits, and the highest 8 bits).

◆ Optionally, dst _L1,0 is a parameter specific to the target SCI condition, that is, different target SCI conditions can correspond to different dst _L1,0 .

◆ Optionally, _{the length of src L1} , 0 can be 16 bits.

◆ Optionally, src _L1 , 0 can be determined by a source layer two identifier (Source Layer-2 ID, or Layer-2 Source ID, layer two source identifier) configured by the UE; for example, src _{L1 , 0} may be a part of the bits of the source layer two identifier (for example, the lowest 16 bits, the lowest 8 bits, the highest 16 bits, and the highest 8 bits).

◆ Optionally, src _L1,0 is a parameter specific to the target SCI condition, that is, different target SCI conditions can correspond to different src _L1,0 .

◆Optionally, the value set of the propagation type (for example, cast ₀ ) can be {unicast, multicast}, {unicast, broadcast}, {multicast, broadcast}, or { Unicast, multicast/broadcast}, it can also be {multicast, unicast/broadcast}, it can also be {broadcast, unicast/multicast}, or it can be {unicast, multicast, broadcast}. Among them, "multicast/broadcast" means multicast or broadcast, "unicast/broadcast" means unicast or broadcast, and "unicast/multicast" means unicast or multicast.

◆ Optionally, cast ₀ is a propagation type setting specific to the target SCI condition, that is, different target SCI conditions can correspond to different cast ₀ .

◆ Optionally, pre-define or configure or pre-configure different target SCI conditions for different propagation types.

◆ Optionally, a given propagation type can only be pre-defined or configured or pre-configured with one or more specific target SCI conditions. For example, for broadcasting, the target SCI condition can only be defined/configured as "the target layer identifier indicated by the SCI is equal to dst _{L1, 0} ".

◆ Optionally, the source layer identifier indicated by the SCI can be indicated in an explicit way (for example, through an independent field), or in an implicit way (for example, through a part of bits or a part of a field). ).

◆ Optionally, the target layer identifier indicated by the SCI can be indicated in an explicit manner (for example, through an independent field), or in an implicit manner (for example, through a part of bits or a part of a field value). ).

◆ Optionally, the propagation type indicated by the SCI can be indicated in an explicit manner (for example, through an independent field), or in an implicit manner (for example, through a part of bits or a part of a field value).

For example, if the UE is configured with the following two parameter sets related to reception:

● The target layer two identifier "0011 0100 0001 1011 0001 0011" (represented by a bit string with a length of 24), and the associated propagation type is broadcast.

●The target layer two identifier "1010 1101 0111 11000001 0111" (represented by a bit string of length 24), the source layer two identifier "0010 0101 0101 1111 0110 1100" (represented by a bit string of 24 length), associated The transmission type is unicast.

Then the UE can configure two target SCI conditions, which are as follows:

● The target layer one identifier indicated by the SCI is equal to "0001 1011 0001 0011" (represented by a bit string with a length of 16), and the propagation type indicated by the SCI is broadcast.

●The target layer one identifier indicated by the SCI is equal to "0111 1100 0001 0111" (represented by a bit string with a length of 16), and the source layer one identifier indicated by the SCI is equal to "0110 1100" (with a length of 8 The bit string indicates), and the transmission type indicated by the SCI is unicast.

In addition, in step S305, it is determined whether to continue processing the SCI and/or the PSCCH associated with the SCI and/or the PSSCH associated with the SCI and/or the TB carried by the PSSCH associated with the SCI.

among them,

● Optionally, the "continue processing the SCI and/or the PSCCH associated with the SCI and/or the PSSCH associated with the SCI and/or the TB carried by the PSSCH associated with the SCI" may include One or more of the following:

◆The SCI and/or the HARQ information associated with the SCI (or the HARQ information associated with the TB) and/or the QoS information associated with the SCI (or the QoS information associated with the TB) ) Deliver to HARQ entity (for example, SL HARQ entity).

◆Direct the TB and/or the HARQ information associated with the TB to the corresponding SL process (or SL HARQ process).

● Optionally, if the SCI and/or the PSCCH associated with the SCI and/or the PSSCH associated with the SCI and/or the TB carried by the PSSCH associated with the SCI are not processed continuously, it is also possible It is considered that the SCI and/or the PSCCH associated with the SCI and/or the PSSCH associated with the SCI and/or the TB carried by the PSSCH associated with the SCI are discarded.

● Optionally, "determine whether to continue processing the SCI and/or the PSCCH associated with the SCI and/or the PSSCH associated with the SCI and/or the TB carried by the PSSCH associated with the SCI" Described as "determine whether the SCI is the SCI of interest, and/or determine whether the PSCCH associated with the SCI is the PSCCH of interest, and/or determine whether the PSSCH associated with the SCI is the PSSCH of interest, And/or whether the TB carried by the PSSCH associated with the SCI is a TB of interest".

For example, if the SCI is the target SCI, continue to process the SCI and/or the PSCCH associated with the SCI and/or the PSSCH associated with the SCI and/or the TB carried by the PSSCH associated with the SCI .

For another example, if the SCI is not the target SCI, discard the SCI and/or the PSCCH associated with the SCI and/or the PSSCH associated with the SCI and/or the TB carried by the PSSCH associated with the SCI .

In this way, according to the third embodiment, the present invention provides a method to filter out all SL transmissions that do not require further processing according to flexible target SCI conditions when receiving SCI, which greatly improves the efficiency of UE receiving SL transmissions.

[Modifications]

Hereinafter, FIG. 4 is used to illustrate a user equipment that can execute the method executed by the user equipment described in detail above in the present invention as a modified example.

Fig. 4 is a block diagram showing a user equipment UE related to the present invention.

As shown in FIG. 4, the user equipment UE40 includes a processor 401 and a memory 402. The processor 401 may include, for example, a microprocessor, a microcontroller, an embedded processor, and the like. The memory 402 may include, for example, volatile memory (such as random access memory RAM), hard disk drive (HDD), non-volatile memory (such as flash memory), or other memories. The memory 402 stores program instructions. When the instruction is executed by the processor 401, it can execute the above-mentioned method executed by the user equipment described in detail in the present invention.

The method and related equipment of the present invention have been described above in conjunction with preferred embodiments. Those skilled in the art can understand that the methods shown above are only exemplary, and 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 and sequence shown above. The network nodes and user equipment shown above may include more modules, for example, may also include modules that can be developed or developed in the future and can be used for base stations, MMEs, or UEs, and so on. The various identifiers shown above are only exemplary rather than restrictive, and the present invention is not limited to specific information elements as examples of these identifiers. Those skilled in the art can make many changes and modifications based on the teaching of the illustrated embodiment. Those skilled in the art can understand that when one or more mathematical symbols in any formula or mathematical expression is a constant or a given expression, the formula or mathematical expression can be simplified (for example, combined Constant term) or rewrite.

It should be understood that the foregoing embodiments of the present invention can be implemented by software, hardware, or a combination of both software and hardware. For example, the various components inside the base station and user equipment in the above embodiments can be implemented by a variety of devices, including but not limited to: analog circuit devices, digital circuit devices, digital signal processing (DSP) circuits, programmable processing Device, application specific integrated circuit (ASIC), field programmable gate array (FPGA), programmable logic device (CPLD), etc.

In this application, "base station" may refer to a mobile communication data and control switching center with a certain transmission power and a certain coverage area, including functions such as resource allocation and scheduling, data reception and transmission. "User equipment" may refer to a user's mobile terminal, for example, including mobile phones, notebooks, and other terminal devices that can communicate with base stations or micro base stations wirelessly.

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

In addition, each functional module or each feature of the base station equipment and terminal equipment used in each of the foregoing embodiments may be implemented or executed by a circuit, and the circuit is usually one or more integrated circuits. Circuits designed to perform the functions described in this specification can include general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC) or general-purpose integrated circuits, field programmable gate arrays (FPGA), or other Programming logic devices, discrete gate or transistor logic, or discrete hardware components, or any combination of the above devices. The general-purpose processor may be a microprocessor, or the processor may be an existing processor, controller, microcontroller, or state machine. The above-mentioned general-purpose processor or each circuit may be configured by a digital circuit, or may be configured by a logic circuit. In addition, when advanced technologies that can replace current integrated circuits appear due to advances in semiconductor technology, the present invention can also use integrated circuits obtained by using this advanced technology.

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

Claims (10)

A method executed by user equipment, characterized in that it includes: Obtain information related to the second stage of SCI; and Processing the second stage SCI, Wherein, the second stage SCI and the corresponding first stage SCI are sent by another UE. The method of claim 1, wherein: The information related to the second-stage SCI is at least one of predefined or configured or pre-configured or the size and format of the second-stage SCI indicated by the corresponding first-stage SCI. The method of claim 1, wherein: If the second-stage SCI meets the second-stage SCI processing conditions, the second-stage SCI processing operation is executed. The method of claim 3, wherein: The second-stage SCI processing conditions include one or more of the following: ·Null condition (or "unconditional"); · The value of one reserved bit in the second stage SCI is 1; · The value of multiple reserved bits in the second stage SCI is 1; · The value of all reserved bits in the second stage SCI is 1; · The value of one reserved bit in the second stage SCI is 0; · The value of multiple reserved bits in the second stage SCI is 0; · The value of all reserved bits in the second stage SCI is 0; · The value of one stuffing bit in the second stage SCI is 1; · The value of multiple padding bits in the second stage SCI is 1; · The value of all padding bits in the second stage SCI is 1; · The value of a stuffing bit in the second stage SCI is 0; · The value of multiple padding bits in the second stage SCI is 0; · The value of all padding bits in the second stage SCI is 0; ·C>x; ·C≥x; ·C=x; ·C≠x; ·C<x; ·C≤x; ·C＞C; ·C≥C; ·C=C; ·C≠C; ·C＜C; ·C≤C; ·C＞P; ·C≥P; ·C=P; ·C≠P; ·C＜P; ·C≤P, Where x is the pre-filled size of the second stage SCI, C is the smallest value among the elements greater than or equal to x in a predefined or configured or pre-configured set, and P is a predefined or configured or pre-configured value. The method of claim 3, wherein: The second-stage SCI processing operations include one or more of the following: · Discard the second stage SCI; · Discard the first-stage SCI corresponding to the second-stage SCI; · Discard the physical direct control channel PSCCH carrying the first-stage SCI corresponding to the second-stage SCI; · Discard the physical direct shared channel PSSCH carrying the second-stage SCI; ·Truncate the second stage SCI; · Fill the second stage SCI. The method of claim 3, wherein: In the truncation operation, the size of the second stage SCI after truncation is x; and In the filling operation, the size of the second stage SCI after filling is C, Wherein, x is the pre-filled size of the second stage SCI, and C is the smallest value among elements greater than or equal to x in a predefined or configured or pre-configured set. A method executed by user equipment, characterized in that it includes: Determine the size of the second stage SCI; Process the second stage of SCI; and The second stage SCI is transmitted. The method according to claim 7, wherein: The size of the second stage SCI is a pre-defined or configured or pre-configured value, or is the smallest value among elements greater than or equal to x in a pre-defined or configured or pre-configured set, Where, x is the size before filling of the second stage SCI. The method according to claim 7, wherein: The method for processing the second stage SCI includes one or more of the following: ·Fill the second stage SCI; ·Truncate the second stage SCI; • Discard the second stage SCI. A user equipment including: Processor; and Memory, storing instructions, Wherein, the instruction executes the method according to any one of claims 1-9 when run by the processor.

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