CN111601274A - Method performed by user equipment and user equipment - Google Patents

Abstract

The invention provides a method executed by user equipment and the user equipment, wherein the method comprises the following steps: the UE monitors first side communication control information SCI sent by other user equipment UE; removing a used configuration scheduling grant CG from a configuration scheduling grant CG resource pool based on the first SCI; and the UE selects an unused CG in the CG resource pool and sends a second SCI.

Description

Method performed by user equipment and user equipment

technical field

The present invention relates to the technical field of wireless communication, and in particular, to a method performed by a user equipment and a corresponding user equipment.

Background technique

In traditional cellular networks, all communications must go through base stations. The difference is that D2D communication (Device-to-Device communication, direct device-to-device communication) refers to a direct communication method between two user equipments without being forwarded by a base station or a core network. At the RAN#63 plenary meeting of the 3rd Generation Partnership Project (3GPP) in March 2014, a research topic on implementing adjacent D2D communication services using LTE equipment was approved (see Non-Patent Document 1). Features introduced in LTE Release 12D2D include:

1) The discovery function (Discovery) between adjacent devices in the LTE network coverage scenario;

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

3) The upper layer supports unicast (Unicast) and multicast (Groupcast) communication functions.

At the 3GPP RAN#66 plenary meeting in December 2014, a research project for enhanced LTE eD2D (enhanced D2D) was approved (see Non-Patent Document 2). Key features introduced in LTE Release 13eD2D include:

1) D2D discovery of no network coverage scenarios and partial network coverage scenarios;

2) The priority processing mechanism of D2D communication.

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

1) V2V, Vehicle to Vehicle, that is, vehicle-to-vehicle communication;

2) V2P, Vehicle to Pedestrian, that is, vehicles send warnings to pedestrians or non-motor vehicles;

3) V2N, Vehicle to Network, that is, the vehicle connects to the mobile network;

4) V2I, Vehicle to Infrastructure, that is, communication between vehicles and road infrastructure.

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

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

2) Introduce sub-channels to enhance resource allocation;

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

The second phase of the V2X research topic belongs to the LTE Release 15 research category (see Non-Patent Document 4), and the main features introduced include high-order 64QAM modulation, V2X carrier aggregation, short TTI transmission, and a feasibility study of transmit diversity.

At the 3GPP RAN#80 plenary meeting in June 2018, the corresponding third-phase V2X feasibility study topic based on 5G NR network technology (see Non-Patent Document 5) was approved. The research plan of this subject includes the design of the sidelink resource allocation method (or called the sidelink transmission mode). At the 3GPP RAN1#94 meeting in August 2018 (see Non-Patent Document 6), sidelink communication includes at least two resource allocation methods, namely mode 1 resource allocation method based on base station scheduling and mode 2 UE determines sidelink communication resources resource allocation method. The specific definitions of Mode 1 and Mode 2 are:

1) Mode 1: The base station schedules the resources used for UE sidelink communication;

2) Mode 2: The UE determines the resources used for sidelink communication in the resources configured or pre-configured by the base station.

Among them, Mode 2 includes 4 sub-modes (sub-modes), which are respectively defined as mode 2(a), (b), (c), (d). The specific definitions of the 4 sub-modes included in Mode 2 are:

1) Mode 2(a): UE selects resources for sidelink communication by itself;

2) Mode 2(b): UE assists other UEs to select sidelink communication resources;

3) Mode 2(c): The base station configures the UE's NR type 1 (NR type1) configuration scheduling grant (configured grant, may be referred to as CG for short);

4) Mode 2(d): The UE schedules resources for other UEs to perform sidelink communication.

In the AH#1901 meeting of 3GPP RAN1 in January 2019 (see Non-Patent Document 7), configuration scheduling grants of NR type 1 and NR type 2 (NR type 2) are discussed and supported through Mode1 resource allocation. Specifically, when the NR base station gNB schedules the UE to perform sidelink communication in mode 1, the gNB can configure CGs of NR type 1 and NR type 2 for the UE. At the same time, in this conference, for the mode 2(c) resource allocation method, when the base station configures one or more CGs for the UE, the UE selects unused CGs according to the perception results.

The solution of the present invention is mainly aimed at the method in which the NR sidelink UE selects an unused CG in the resource allocation mode mode 2(c), and when the NR sidelink UE selects the CG used for sidelink communication, it sets the CG related to the CG in the sidelink control information. domain method. At the same time, the solution of the present invention also includes a method in which, in the resource allocation mode mode 1, the NRsidelink UE sets the field related to the CG in the sidelink control information.

At the 3GPP RAN1#94bis meeting in October 2018, the design of the NR V2X synchronization mechanism included the following two conclusions (see Non-Patent Document 8):

1) For the NR sidelink UE, the eNB is supported as a synchronization source (synchronization source, referred to as sync source, or referred to as sync reference), that is, the NR sidelink UE can select the eNB as the synchronization source;

2) For the NR sidelink, support the eNB to control the resource allocation mode (NR V2X resource allocation mode 2) based on the UE's self-selection in the NR side link, that is, the eNB broadcasts the semi-static configuration information of the NR V2X resource allocation mode 2.

When the NR sidelink UE selects the synchronization source, if the NR sidelink UE can select the gNB or the eNB as the sync reference, the solution of the present invention also includes a method for the NR sidelink UE to select the gNB or the eNB as the synchronization source.

In the AH#1901 meeting of 3GPP RAN1 in January 2019 (see Non-Patent Document 7), the design of the HARQ feedback mechanism for NR V2X multicast (groupcast) includes the following conclusions: For groupcast communication, when HARQ feedback is enabled, Two HARQ feedback mechanisms are supported, namely: 1) the receiving UE only feeds back HARQ NACK; 2) the receiving UE feeds back HARQ ACK and NACK.

For NR V2X multicast communication, the solution of the present invention also includes a method for the receiving UE to determine to feed back HARQ NACK, or to feed back HARQ ACK and NACK.

In Rel-15NR, the UE determines the offset value of the carrier (or resource grid) relative to point A and the offset value of the initial downlink bandwidth segment (initial DL BWP) relative to the carrier (or resource grid) starting CRB The starting CRB number of the initial downstream bandwidth segment. In addition, the NR supports that the base station configures a UE-specific (UE-specific) channel bandwidth (channel bandwidth, or carrier, or resource grid) through dedicated signaling. After the base station configures the UE-specific channel bandwidth, the UE-specific channel bandwidth parameter will overwrite the cell-specific (corresponding) parameter configuration. In the current 3GPP protocol, the gNB only configures the offset value of the UE-specific carrier (or resource grid) relative to point A for the UE, and does not configure the initial downlink BWP relative to the carrier (or the UE-specific configuration information) for the UE in the UE-specific configuration information. resource grid) offset value of the starting CRB. The solution of the present invention provides a method for the base station to configure the UE-specific initial downlink BWP relative to the carrier (or resource grid) starting CRB offset value through dedicated signaling.

prior art literature

Non-patent literature

Non-Patent Document 1: RP-140518, Work item proposal on LTE Device to DeviceProximity Services

Non-Patent Document 2: RP-142311, Work Item Proposal for Enhanced LTE DevicetoDevice Proximity Services

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

Non-Patent Document 4: RP-170798, New WID on 3GPP V2X Phase 2

Non-Patent Document 5: RP-181480, New SID Proposal: Study on NR V2X

Non-Patent Document 6: RAN1 #94, Chairman notes, section 7.2.4.1.4

Non-Patent Document 7: RAN1 AH#1901, Chairman notes, section 7.2.4.1.4, section 7.2.4.3

Non-Patent Document 8: RAN1#94bis, Chairman notes, section 7.2.4.1.3

SUMMARY OF THE INVENTION

In order to solve at least a part of the above problems, the present invention provides a method performed by a user equipment and a user equipment.

According to a first aspect of the present invention, there is provided a method performed by a user equipment UE, comprising: the UE monitoring the first sideline communication control information SCI sent by other user equipment UEs; removing the used configuration scheduling grant CG from the granting CG resource pool; and the UE selecting an unused CG in the CG resource pool and sending a second SCI.

In the above method, the first SCI may include a CG sequence number and/or first reserved resource interval indication information, and the UE removes from the CG resource pool the overlapping CG corresponding to the CG sequence number. CG, and/or, remove the CG overlapping the time-frequency resource indicated by the first reserved resource interval indication information from the CG resource pool.

In the above method, the second SCI may include: the sequence number of the CG selected by the UE, and/or a second reserved resource interval indication corresponding to the UE.

In the above method, the first SCI may include indication information of the time-frequency resource and indication information of the time-frequency resource period or interval, and the UE removes the time-frequency resource period or interval indication information from the CG resource pool. The CG in which the time-frequency resources indicated by the interval indication information overlap.

In the above method, the second SCI may include: an indication corresponding to the time-frequency resource of the UE, and/or an indication of a period or interval corresponding to the time-frequency resource of the UE.

In the above method, the first SCI may include first time-frequency resource period or interval indication information, and/or second time-frequency resource period or interval indication information, and the UE removes from the CG resource pool and The CG that overlaps with the time-frequency resource indicated by the first time-frequency resource period or interval indication information, and/or removes the CG indicated by the second time-frequency resource period or interval indication information from the CG resource pool. The indicated CGs with overlapping time-frequency resources.

In the above method, the second SCI may include: an indication of a period or interval corresponding to the reserved resources of the UE, and/or an indication of the period or interval of the CG selected by the UE.

In the above method, the first SCI may include an indication of a reserved resource period or interval, and/or an indication of a CG period, and the UE removes a period value from the CG resource pool that is greater than the period corresponding to the user equipment. a CG of a reserved resource period or interval, the second SCI includes the period of the CG selected by the UE, and/or the time-frequency resources of the selected CG, and/or the period of the reserved resources corresponding to the UE, or interval.

In the above method, the overlap may represent partial or complete overlap of time domain and frequency domain resources, and the period or interval of the reserved resources corresponding to the UE may be indicated by the upper layer.

According to a second aspect of 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 in the user equipment according to the context .

Description of drawings

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

FIG. 1 is a schematic diagram illustrating sideline communication of an LTE V2X UE.

FIG. 2 is a schematic diagram illustrating a resource allocation manner of LTE V2X in the case of eNB network coverage.

FIG. 3 is a flow chart illustrating a method performed by a user equipment according to the present invention.

FIG. 4 is a schematic diagram illustrating a basic process of a method performed by a user equipment in Embodiment 1 of the present invention.

FIG. 5 is a schematic diagram illustrating a basic process of a method performed by a user equipment in Embodiment 2 of the present invention.

FIG. 6 is a schematic diagram illustrating a basic process of a method executed by a user equipment in Embodiment 3 of the present invention.

FIG. 7 is a schematic diagram illustrating a basic process of a method performed by a user equipment in Embodiment 4 of the present invention.

FIG. 8 is a schematic diagram illustrating a basic process of a method performed by a user equipment in Embodiment 5 of the present invention.

FIG. 9 is a block diagram illustrating a user equipment according to an embodiment of the present invention.

Detailed ways

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. 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 in order to avoid obscuring the understanding of the present invention.

Hereinafter, the 5G mobile communication system and its subsequent evolved versions are used as an example application environment to specifically describe various embodiments according to the present invention. However, it should be pointed out that the present invention is not limited to the following embodiments, but can be applied to more other wireless communication systems, such as communication systems after 5G and 4G mobile communication systems before 5G.

Part of the terms involved in the present invention are described below. Unless otherwise specified, the terms involved in the present invention are defined here. The terms given in the present invention may adopt different naming methods in LTE, LTE-Advanced, LTE-AdvancedPro, NR and later communication systems, but unified terms are adopted in the present invention. When applied to a specific system, it can be Substitute with the term used in the appropriate system.

3GPP: 3rd Generation Partnership Project

LTE: Long Term Evolution, long term evolution technology

NR: New Radio, New Radio, New Radio

PDCCH: Physical Downlink Control Channel, physical downlink control channel

DCI: Downlink Control Information, downlink control information

PDSCH: Physical Downlink Shared Channel, physical downlink shared channel

UE: User Equipment, user equipment

eNB: evolved NodeB, evolved base station

gNB: NR base station

TTI: Transmission Time Interval, transmission time interval

OFDM: Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing

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

CSI: Channel State Indicator, channel state indicator

HARQ: Hybrid Automatic Repeat Request, hybrid automatic repeat request

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

CRS: Cell Reference Signal, cell-specific reference signal

PUCCH: Physical Uplink Control Channel, physical uplink control channel

PUSCH: Physical Uplink Shared Channel, physical uplink shared channel

UL-SCH: Uplink Shared Channel, uplink shared channel

CG: Configured Grant, configure scheduling permission

Sidelink: sideline communication

SCI: Sidelink Control Information, side communication control information

PSCCH: Physical Sidelink Control Channel, Physical Sidelink Communication Control Channel

MCS: Modulation and Coding Scheme, modulation and coding scheme

CRB: Common Resource Block, Common Resource Block

CP: Cyclic Prefix, cyclic prefix

PRB: Physical Resource Block, physical resource block

PSSCH: Physical Sidelink Shared Channel, Physical Sidelink Shared Channel

FDM: Frequency Division Multiplexing, Frequency Division Multiplexing

RRC: Radio Resource Control, Radio Resource Control

RSRP: Reference Signal Receiving Power, reference signal receiving power

SRS: Sounding Reference Signal, sounding reference signal

DMRS: Demodulation Reference Signal, demodulation reference signal

CRC: Cyclic Redundancy Check, Cyclic Redundancy Check

PSDCH: Physical Sidelink Discovery Channel, Physical Sidelink Discovery Channel

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

SFI: Slot Format Indication, slot format indication

TDD: Time Division Duplexing

FDD: Frequency Division Duplexing, Frequency Division Duplexing

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

SLSS: Sidelink synchronization Signal, side communication synchronization signal

PSSS: Primary Sidelink Synchronization Signal, side communication main synchronization signal

SSSS: Secondary Sidelink Synchronization Signal, Sidelink Communication Secondary Synchronization Signal

PCI: Physical Cell ID, physical cell identification

PSS: Primary Synchronization Signal, the main synchronization signal

SSS: Secondary Synchronization Signal, secondary synchronization signal

BWP: BandWidth Part, Bandwidth Fragment/Part

GNSS: Global Navigation Satellite System, global navigation satellite positioning system

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

DFN: Direct Frame Number, direct frame number

IE: Information Element, information element

SSB: Synchronization Signal Block, Synchronization System Information Block

EN-DC: EUTRA-NR Dual Connection, LTE-NR Dual Connection

MCG: Master Cell Group

SCG: Secondary Cell Group, secondary cell group

PCell: Primary Cell, primary cell

SCell: Secondary Cell, secondary cell

PSFCH: Physical Sidelink Feedback Channel, Physical Sidelink Feedback Channel

The following is a description of the prior art associated with the aspects of the present invention. Unless otherwise specified, the meanings of the same terms in the specific embodiments are the same as those in the prior art.

It is worth pointing out that the V2X and sidelink involved in the description of the present invention have the same meaning. V2X in the text can also represent sidelink; similarly, sidelink in the text can also represent V2X, and no specific distinction or limitation will be made in the following text.

CG and resource pattern in the specification of the present invention can be replaced equally. That is, the CG referred to in the specification may also represent the resource style, and the referenced resource style may also represent the CG.

The resource allocation mode of V2X (sidelink) communication in the specification of the present invention and the transmission mode of V2X (sidelink) communication can be equivalently replaced. The resource allocation method referred to in the specification may represent the transmission mode, and the transmission mode referred to may represent the resource allocation method.

In the specification of the present invention, floor( ) represents a round-down operation, and mod( ) represents a remainder operation.

The notation "A->B" in the specification of the present invention indicates that the parameter (or, IE) A includes the configuration of the parameter (or, IE) B. In addition, in the specification of the present invention, parameters with the same identifier have the same meaning, and the configuration information has the same form.

In the specification of the present invention, the CG resource pool (CG pool) represents one or more CGs configured by the base station or pre-configured by the user equipment (Pre-configuration).

NR Type 1 (type 1) Configuration Scheduling Grant (CG)

In Rel-15NR, on the basis of supporting DCI dynamic scheduling of PUSCH, it also supports the uplink scheduling method based on CG. In the specification of the present invention, CG stands for configured grant, ie, represents a configured scheduling grant. For NR type1 configuration scheduling grant, the base station configures the CG for the UE through RRC signaling. In the NR type 1 configuration scheduling grant mechanism, the UE does not need to monitor the DCI dynamic scheduling including the UL grant, and can use the CG configured by the base station to send the PUSCH. Specifically, the base station configures parameters of PUSCH transmission through RRC signaling configuredGrantConfig, and the RRC signaling configuredGrantConfig includes rrc-ConfiguredUplinkGrant. The configuration scheduling grant configuredGrantConfig includes at least the time domain resources, frequency domain resources and the period of the resources of the semi-persistently scheduled PUSCH. The rrc-ConfiguredUplinkGrant includes the scheduling of the above-mentioned time domain resources and frequency domain resources. In the type 1CG PUSCH transmission, the UE does not need to monitor the uplink scheduling grant (UL grant) in the DCI. After the base station configures the type 1CG (IE: configuredGrantConfig), the UE can use the configured CG resources to transmit the PUSCH.

Overview of Rel-15EN-DC

Rel-15 supports LTE-NR dual connection (Dual Connection, abbreviated as EN-DC). EN-DC indicates that for an NR UE, the UE performs initial access through an LTE cell and is also configured with an NR cell, so it is called dual connectivity. In the EN-DC scenario, one or more cells of the LTE base station eNB are called MCG. The frequency where the MCG cell is located is called the serving frequency of the MCG. Among them, the MCG working at the primary frequency is called PCell. One or more cells of the NR base station gNB are called SCG. The frequency where the SCG cell is located is called the serving frequency of the SCG. In the SCG, the cell where the UE performs RRC reconfiguration and performs random access is called PSCell, that is, PrimarySCell.

NR parameter set (numerologv)

The parameter set of NR includes two aspects: subcarrier spacing and CP length. Rel-15NR supports a total of 5 subcarrier spacings, which are 15kHz, 30kHz, 60kHz, 120kHz, 240kHz (corresponding to μ=0, 1, 2, 3, 4). Table 4.2-1 shows the set of parameters supported by NR. As follows.

Table 4.2-1.NR numerology

μ Δf=2^μ·15[kHz] CP (Cyclic Prefix) 0 15 normal 1 30 normal 2 60 normal, extended 3 120 normal 4 240 normal

Extended CP is supported only when μ=2, that is, in the case of 60 kHz subcarrier spacing, and only normal CP is supported in other subcarrier spacings. For normal (Normal) CP, each slot (slot) contains 14 OFDM symbols; for extended CP, each slot contains 12 OFDM symbols. For μ=0, i.e. 15kHz subcarrier spacing, 1 slot=1ms; μ=1, i.e. 30kHz subcarrier spacing, 1 slot=0.5ms; μ=2, i.e. 60kHz subcarrier spacing, 1 slot =0.25ms, and so on.

NR Common Resource Block (Common RB, CRB)

The Common Resource Block CRB is defined for the parameter set numerology. For all the numerologies, the center frequency of subcarrier 0 of the common resource block CRB number 0 points to the same position in the frequency domain, which is called "point A".

NR resource grid

个子载波(即

个资源块RB，每个资源块包含

个子载波subcarrier)，在时域上包含

个OFDM符号(

表示一个子帧内的OFDM符号数，具体取值和μ有关)，其中

指一个资源块RB中的子载波个数，满足

资源栅格的最低编号的公共资源块(common resource block，CRB)

由高层参数offsetToCarrier配置，频域资源块个数

由高层参数carrierBandwidth配置。其中，对于给定的numerology以及高层参数offsetToCarrier，gNB通过专用信令(dedicated signaling)在ServingCellConfigCommon IE中配置小区特定(cell specific)的公共(common)offsetToCarrier。具体为：ServingCellConfigCommon中包括高层参数downlinkConfigCommon，在downlinkConfigCommon中包含offsetToCarrier的配置信息。In a given transmission direction of a carrier (represented by x, where x=DL means downlink, if x=UL means uplink), a resource grid is defined for each number, which contains in the frequency domain

subcarriers (ie

resource blocks RB, each resource block contains

subcarriers), including in the time domain

OFDM symbols (

Represents the number of OFDM symbols in a subframe, the specific value is related to μ), where

Refers to the number of subcarriers in a resource block RB, satisfying

The lowest numbered common resource block (CRB) of the resource grid

Configured by the high-level parameter offsetToCarrier, the number of frequency domain resource blocks

Configured by the high-level parameter carrierBandwidth. Wherein, for a given numerology and a higher layer parameter offsetToCarrier, the gNB configures a cell-specific (common) offsetToCarrier in the ServingCellConfigCommon IE through dedicated signaling. Specifically, the ServingCellConfigCommon includes the high-level parameter downlinkConfigCommon, and the downlinkConfigCommon includes the configuration information of offsetToCarrier.

Bandwidth Fragment (BWP) and Initial Downlink Bandwidth Fragment (initial DL BWP)

和长度

必须同时满足以下关系：In NR, for each parameter set numerology, one or more bandwidth segments can be defined. Each BWP contains one or more consecutive CRBs. Assuming that the number of a BWP is i, its starting point

and length

The following relationships must be satisfied at the same time:

使用CRB编号，表示BWP的最低编号的CRB到point A的距离，以RB为单位。That is, the CRB contained in the BWP must be located in the resource grid of the corresponding numerology.

Use the CRB number to indicate the distance from the lowest numbered CRB of the BWP to point A, in RB.

其中物理资源块0对应该BWP的最低编号的CRB，即CRB

对于某个serving cell，gNB通过如下高层参数配置某个BWP：The resource blocks in the BWP are called physical resource blocks (PRBs), which are numbered as

Among them, physical resource block 0 corresponds to the lowest numbered CRB of the BWP, that is, CRB

For a serving cell, the gNB configures a BWP through the following high-level parameters:

1) Subcarrier spacing;

2) CP length;

的偏移值offset(RB_start)和该BWP频域上连续CRB的个数L_RB，满足

其中O_carri盯表示offsetToCarrier；其中，参数locationAndBandwidth指示一个RIV(Resource Indication Value，资源指示值)。RIV关于L_RB和RB_start的计算关系为：如果

那么

否则，

其中，

并且，

3) The high-level parameter locationAndBandwidth indicates that the BWP starts CRB relative to the resource grid

The offset value offset(RB _start ) and the number of consecutive CRBs L _RB in the BWP frequency domain satisfy

Wherein O _carristar indicates offsetToCarrier; wherein, the parameter locationAndBandwidth indicates an RIV (Resource Indication Value, resource indication value). The calculation relationship of RIV on L _RB and RB _start is: if

So

otherwise,

in,

and,

4) The serial number of the BWP;

5) BWP public and BWP-specific parameter configuration, such as the configuration of PDCCH and PDSCH of downlink BWP, etc.

The downlink BWP used by the UE when performing initial access (initial access) is called an initial downlink BWP (initialdownlink BWP).

Scenario of Sidelink Communication

1) Out-of-Coverage sideline communication: neither of the two UEs performing sidelink communication has network coverage (for example, the UE cannot detect any cell cell, indicating that the UE has no network coverage).

2) Sidelink communication with network coverage (In-Coverage): Both UEs performing sidelink communication have network coverage (for example, the UE detects at least one cell that satisfies the "cell selection criterion" on the frequency where sidelink communication needs to be performed, Indicates that the UE has network coverage).

3) Partial-Coverage sidelink communication: one of the UEs performing sidelink communication has no network coverage, and the other UE has network coverage.

From the UE side, the UE has only two scenarios: no network coverage and network coverage. Part of the network coverage is described in terms of sidelink communication.

NR V2X unicast (unicast), multicast (groupcast) and broadcast (broadcast)

In the existing LTE V2X communication, only broadcast communication of the physical layer is supported. Broadcast communication is widely used in cellular communication scenarios such as the base station sending system messages to UEs in the cell. The design goals of NR V2X include supporting physical layer unicast communication and multicast communication. Unicast communication refers to communication between a sending user equipment (UE) and a single receiving user equipment. Multicast communication generally means that a group of UEs are assigned the same identity (Indentity, ID), the UE sends V2X data to other UEs in the group, and receives V2X data sent by other UEs in the group. It is worth noting that, in order to better improve transmission reliability and spectral efficiency, HARQ retransmission mechanisms are usually included in unicast communication and multicast communication. HARQ stands for Hybrid Automatic Retransmission, which can provide error correction function and realize fast retransmission, and is widely used in wireless data communication. HARQ feedback includes HARQ ACK and HARQ NACK. Wherein, HARQ ACK indicates that the receiving UE correctly receives and decodes the data of the sending UE, so HARQ ACK is fed back; HARQ NACK indicates that the receiving UE does not correctly receive and decode the data of the sending UE. When the receiving UE feeds back HARQNACK, the sending UE may retransmit the corresponding data to ensure improved reliability of data communication. In NR V2X, HARQ ACK and HARQ NACK are carried by the Physical Sidelink Feedback Channel (PSFCH).

Basic process of LTE V2X (sidelink) communication

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

1) The PSCCH occupies one subframe in the time domain and two consecutive PRBs in the frequency domain. The initialization of the scrambling sequence takes the predefined value 510 . PSCCH can carry SCI format 1, wherein SCI format 1 at least includes time-frequency domain resource information of PSSCH. For example, for the frequency domain resource indication field, SCI format 1 indicates the starting sub-channel number and the number of consecutive sub-channels of the PSSCH corresponding to the PSCCH.

2) The PSSCH occupies one subframe in the time domain, and adopts frequency division multiplexing (FDM) with the corresponding PSCCH. PSSCH occupies one or more consecutive sub-channels in the frequency domain, sub-channels represent n _subCHsize consecutive PRBs in the frequency domain, n _subCHsize is configured by the RRC parameter, and the number of sub-channels is determined by the frequency domain of SCI format 1 Resource Indication field indication.

LTE V2X resource allocation method Transmission Mode 3/4 (when there is eNB network coverage)

Figure 2 shows two resource allocation methods of LTE V2X when there is eNB network coverage on the frequency for sidelink communication, respectively called resource allocation based on base station scheduling (Transmission Mode 3) and based on UE sensing (sensing). ) resource allocation (Transmission Mode 4). In LTE V2X, when there is eNB network coverage, the base station can configure the UE's resource allocation method, or the UE's transmission mode, through UE-level dedicated RRC signaling (dedicated RRC signaling) SL-V2X-ConfigDedicated ,Specifically:

1) Resource allocation method based on base station scheduling (Transmission Mode 3): The resource allocation method based on base station scheduling indicates that the time domain and frequency domain resources used for sidelink communication come from the scheduling of the base station. Specifically, when the RRC signaling SL-V2X-ConfigDedicated is set to scheduled-r14, it indicates that the UE is configured as a transmission mode based on the base station scheduling. The base station configures SL-V-RNTI through RRC signaling, and sends an uplink scheduling grant UL grant to the UE through PDCCH (DCI format 5A, CRC is scrambled by SL-V-RNTI). The above-mentioned uplink scheduling grant UL grant at least includes scheduling information of PSSCH time domain and frequency domain resources in sidelink communication. When the UE successfully monitors the PDCCH scrambled by the SL-V-RNTI, it uses the PSSCH time domain and frequency domain resource indication domains in the UL grant as the time domain and frequency domain resources of the PSSCH in the PSCCH (SCI format 1). Indication information, and send PSCCH (SCI format 1) and corresponding PSSCH.

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

LTE V2X resource allocation method Transmission Mode 4 (when there is no eNB network coverage)

In the case where there is no eNB network coverage on the frequency for sidelink communication, LTE V2X only supports the resource allocation method based on UEsensing, that is, only supports the transmission mode Mode 4. The resource allocation method based on UE sensing indicates that the resources used for sidelink communication are based on the sensing process of the UE to the set of candidate available resources. In the UE sensing-based transmission mode, the UE determines the PSSCH sidelink transmission resources in the pre-configured transmission resource pool (resource pool) according to certain rules (see the LTE V2X UE sensing process for a detailed process description). , and send PSCCH (SCI format 1) and corresponding PSSCH.

NR V2X resource allocation mode Mode 1 and Mode 2

NR V2X (sidelink) sidelink communication includes at least two resource allocation methods, which are called mode 1 resource allocation method based on base station scheduling and mode 2 UE determined sidelink communication resource resource allocation method. The specific definitions of Mode 1 and mode2 are:

1) Mode 1: The base station schedules the resources used for UE sidelink communication;

2) Mode 2: The UE determines the resources used for sidelink communication in the resources configured or pre-configured by the base station.

Among them, Mode 2 includes 4 sub-modes (sub-modes), which are respectively defined as mode 2(a), (b), (c), (d). The specific definitions of the 4 sub-modes included in Mode 2 are:

1) Mode 2(a): UE selects resources for sidelink communication by itself;

2) Mode 2(b): UE assists other UEs to select sidelink communication resources;

3) Mode 2(c): The base station configures the UE's NR type 1 (NR type 1) configuration scheduling grant (configured grant, may be referred to as CG for short);

4) Mode 2(d): The UE schedules resources for other UEs to perform sidelink communication.

Method for LTE V2X UE to determine PSSCH subframe resource pool (subframe resource pool)

满足：In LTE V2X, the method for determining the subframe resource pool is based on all subframes in the range of SFN#0-SFN#1023, totaling 10240 subframes. Here, the subframe set that may belong to the V2X UE sending PSSCH subframe resource pool is expressed as

Satisfy:

1)

的子帧对应SFN#0或者DFN#0的子帧#0，2) The subframes in the above-mentioned subframe set are numbered relative to the subframe #0 of SFN#0 or DFN#0, that is,

The subframe corresponding to SFN#0 or subframe #0 of DFN#0,

3) The above-mentioned subframe set includes all subframes after removing the following subframes (subframes included in a, b, and c):

a) Subframes configured with SLSS, the number is denoted as N _SLSS ;

b) downlink subframes and special subframes in the TDD cell, the number is expressed as N _dssf ;

c) reserved (reserved) subframes, wherein the method for determining the reserved subframes is:

子帧l_r对应编号的子帧属于预留子帧。After removing N _SLSS and N _dssf subframes from all subframes with subframe numbers 0-10239, the remaining (10240-N _SLSS -N _dssf ) subframes are arranged in ascending order of subframe numbers, which can be expressed as (l ₀ , l ₁ , ..., l ₁₀₂₄₀ -N _SLSS -N _dssf - ₁ ). r=floor(m·(10240-N _SLSS -N _dssf )/N _reserved ). where m=0, 1, . . . , N _reserved -1, and N _reserved =(10240-N _SLSS -N _dssf )mod L _bitmap . L _bitmap represents the length of the bitmap configured by the resource pool, which is configured by the upper layer, and the bitmap can be expressed as

The subframes corresponding to the numbers of the subframes 1 _r belong to reserved subframes.

4) The subframes in the subframe set are arranged in ascending order of subframe numbers.

中的子帧

如果满足bk，＝1，其中k′＝k mod L_bitmap，则子帧

属于PSSCH子帧资源池。The method for the UE to determine the PSSCH subframe resource pool is: for the subframe set

subframe in

If bk,=1 is satisfied, where k′=k mod L _bitmap , then the subframe

It belongs to the PSSCH subframe resource pool.

Reserved resources for LTE V2X transmission mode 4 (Transmission Mode 4)

那么该UE在子帧

上预留资源。其中j＝1，2，...，C_re_sel-1，C_resel＝10×SL_RESOURCE_RESELECTION_COUNTER，SL_RESOURCE_RESELECTION_COUNTER由高层配置。如果高层未配置，则C_resel＝1。P_{rsvp_TX}′＝P_step×P_{rsvp_TX}/100。LTE V2X包含周期性业务，业务产生的周期约为P_serv＝100ms。其中，P_step表示在P_serv内可用的上行子帧数目。如下表格14.1.1-1示出了LTE V2X中P_step在不同TDD上下行配置信息时的取值。例如对于TDD UL/DL配置信息2，每个系统帧内包含2个上行子帧。在P_serv＝100ms的业务周期内，共包含上行子帧20个。表1中示出了针对边缘连接传输模式3和4的P_step的确定，具体如下表格所示。In LTE V2X transmission mode 4, when the UE determines the resources for sending sidelink communication through the sensing process, the UE reserves resources for periodic service data. It is assumed that the subframe resource for sending PSSCH determined by the UE is expressed as a subframe

Then the UE is in the subframe

Reserve resources. where j=1, 2, . . . , _Cresel -1, _Cresel =10× _{SL_RESOURCE_RESELECTION_COUNTER} , SL_RESOURCE_RESELECTION_COUNTER is configured by the upper layer. _Cresel =1 if the upper layer is not configured. P _{rsvp_TX} ′=P _step ×P _{rsvp_TX} /100. LTE V2X includes periodic services, and the period in which the services are generated is about P _serv =100ms. Wherein, P _step represents the number of available uplink subframes in P _serv . The following table 14.1.1-1 shows the value of P _step in different TDD uplink and downlink configuration information in LTE V2X. For example, for TDD UL/DL configuration information 2, each system frame includes 2 uplink subframes. In the service period of P _serv =100ms, 20 uplink subframes are included. The determination of P _step for edge connection transmission modes 3 and 4 is shown in Table 1, as shown in the following table.

Table 1

P_step UUDL configuration information of TDD 0 60 UL/DL configuration information for TDD 1 40 UL/DL configuration information for TDD 2 20 UL/DL configuration information for TDD 3 30 UL/DL configuration information for TDD4 20 UL/DL configuration information for TDD5 10 UUDL configuration information for TDD 6 50 other 100

P _{rsvp_TX} represents a resource reservation interval indicated by an upper layer.

LTE V2X UE determines the resource reservation indication field in SCI

The resource reservation interval indicated by the upper layer is denoted as P _{rsvp_TX} . The UE determines the value of X=P _{rsvp_TX} /100 according to the upper layer instruction, and combined with the following Table 2, the UE can determine the resource reservation indication field (4-bit indication field) in the SCI.

Form 2

UE sensing process in LTE V2X transmission mode 4 (Transmission Mode 4)

中监听其他UE发送的SCI format 1，根据上述成功译码的SCI format 1，该UE确定子帧#(n+T1)到子帧#(n+T2)间的候选资源集合中的可用资源。其中，如果子帧#n属于子帧集合

那么

否则，

表示子帧#n后的首个属于子帧集合

的子帧。T1和T2取决于UE的具体实现。For the process of UE sensing, in general, in LTE V2X transmission mode 4, the upper layer requests sidelink data to be sent in subframe #n, and the UE needs to send sidelink data in subframe #n.

It monitors the SCI format 1 sent by other UEs, and according to the successfully decoded SCI format 1, the UE determines the available resources in the candidate resource set between subframe #(n+T1) and subframe #(n+T2). Among them, if subframe #n belongs to the subframe set

So

otherwise,

Indicates that the first subframe after subframe #n belongs to the subframe set

subframe. T1 and T2 depend on the specific implementation of the UE.

Each element in the candidate resource set between subframe #(n+T1) and subframe #(n+T2), that is, each candidate resource can be called a candidate single subframe resource (candidate single subframe resource), using R _{x , y} to represent. The specific definition of R _{x, y} is:

1) x represents consecutive L _subCH sub-channel#(x+j) in the frequency domain, where j=0, 1, ..., L _subCH -1.

2) v represents the time domain subframe

The UE assumes that between subframe #(n+T1) and subframe #(n+T2), any consecutive L _subCH sub-channels belonging to the PSSCH resource pool correspond to a candidate single subframe resource. The candidate resource set is represented by _SA .

接收的SCI format 1中的资源预留指示域为P_rsvp_RX。如果UE在子帧

接收的SCI format 1或者在子帧

接收的相同SCI format1中指示的PSSCH资源块(resource blocks)和子帧资源与候选单子帧资源R_x，y+j×P_{rsvp_TX}′重合或者部分重叠时，则UE将候选单子帧资源R_x，y从S_A移除(exclude)。其中，q＝1，2，...，Q，以及，j＝1，2，...，C_resel-1。如果P_{rsvp_RX}<1并且n′-m≤P_step×P_{rsvp_RX}，则Q＝1/P_{rsvp_RX}；否则，Q＝1。Remember that the UE is in the subframe

The resource reservation indication field in the received SCI format 1 is P _rsvp _RX. If the UE is in the subframe

received SCI format 1 or in subframes

When the received PSSCH resource blocks (resource blocks) and subframe resources indicated in the same SCI format1 overlap or partially overlap with the candidate single subframe resource Rx _,y+j ×P _{rsvp_TX} ′, the UE will use the candidate single subframe resource Rx _,y Remove from _SA . where q=1, 2, . . . , Q, and j=1, 2, . . . , _Cresel -1. If P _{rsvp_RX} < 1 and n′-m≦P _step ×P _{rsvp_RX} , then Q=1/P _{rsvp_RX} ; otherwise, Q=1.

LTE V2X UE select synchronization source

A synchronization source may be referred to simply as a sync source, or simply as a syncreference. In LTE V2X, similar to the cellular network communication mechanism, if the UE has data to transmit, the UE first needs to perform synchronization in the time domain and frequency domain. In cellular network communication, after the UE receives the primary synchronization and secondary synchronization signals, the timing relationship (or called timing) of the cells can be determined. Specifically, taking time domain synchronization as an example, in LTE, the UE determines frame synchronization and subframe synchronization according to the received PSS and SSS; in NR, the UE determines the number of the synchronization system information block SSB and the predefined SSB mapping method according to the received PSS and SSS. Determine frame synchronization and subframe/slot synchronization. For V2X or sidelink communication, the UE determines the timing relationship of sidelink or V2X transmission or reception according to the timing relationship of the selected synchronization source. For LTE V2X, the UE needs to select the synchronization source. Possible synchronization sources include:

1) eNB;

2) GNSS;

3) LTE sidelink UE.

The UE determines a synchronization source (Synchronization Source) according to a predefined priority criterion. The priority criterion includes but is not limited to: the priority of the base station eNB is higher than that of the sidelink UE, and the priority of the sidelink UE with a higher RSRP is higher. That is, when other conditions are the same, the UE preferentially selects the base station eNB as the synchronization source compared to the sidelink UE. In the embodiment of the present invention, if the UE is involved in selecting a synchronization source, by default, the UE will determine the synchronization source according to a certain priority criterion.

LTE sidelink discovery (Discovery) mode

In LTE sidelink, sidelink UEs are supported to send and monitor sidelink discovery messages (Discovery Message). The discovery message is carried in the physical sideline communication discovery channel PSDCH. The discovery mode in LTE sidelink is used for mutual discovery between neighboring UEs. There are two Discovery Models defined in the LTE sidelink.

1) Mode A: A discovery mode called "I am here". Mode A includes two types of UEs.

■Notifying UE (Announcing UE): The UE notifies the discovery message, and the nearby UE can receive it and use the above discovery message for sidelink discovery;

■Monitoring UE: a nearby UE that monitors the discovery message sent by the notification UE.

2) Mode B: A discovery mode called "Who is there?" or "Are you there?". Mode B includes two types of UEs.

■Discoverer UE: The UE sends a discovery message. The discovery message includes request information.

■ Discovered UE (Discoveree UE): The UE receives the request message and replies with information related to the request message.

Next, the method performed by the user equipment UE in the present invention will be described. Specifically, as an example, FIG. 3 shows a flowchart of the method 10 performed by the user equipment UE based on an embodiment of the present disclosure.

As shown in FIG. 3 , in step 11, the user equipment UE monitors the first sideline communication control information SCI sent by other user equipment UEs.

For the first SCI, for example, the first SCI may include a CG sequence number and/or first reserved resource interval indication information. In addition, for example, the first SCI may include indication information of the time-frequency resource and indication information of the period or interval of the time-frequency resource. For example, the first SCI may include first time-frequency resource period or interval indication information, and/or second time-frequency resource period or interval indication information. Also, for example, the first SCI may contain an indication of a reserved resource period or interval, and/or an indication of a CG period.

In step 12, based on the first SCI, the used configuration scheduling grant CG is removed from the configuration scheduling grant CG resource pool.

In step 13, the user equipment UE selects an unused CG in the CG resource pool, and sends a second SCI.

In the case that the first SCI includes the CG sequence number and/or the first reserved resource interval indication information, the UE removes the CG overlapping the CG corresponding to the CG sequence number from the CG resource pool, and/or, removing the CG overlapping the time-frequency resource indicated by the first reserved resource interval indication information from the CG resource pool. Moreover, the second SCI may include: the sequence number of the CG selected by the UE, and/or a second reserved resource interval indication corresponding to the UE.

In addition, in the case that the first SCI includes the indication information of the time-frequency resource and the indication information of the time-frequency resource period or interval, the UE removes the time-frequency resource period or interval indication information from the CG resource pool. The CG in which the time-frequency resources indicated by the interval indication information overlap. In addition, the second SCI may include: an indication of the time-frequency resource corresponding to the UE, and/or an indication of the period or interval of the time-frequency resource corresponding to the UE.

Furthermore, when the first SCI includes the first time-frequency resource period or interval indication information, and/or the second time-frequency resource period or interval indication information, the UE is removed from the CG resource pool. The CG that overlaps with the time-frequency resource indicated by the first time-frequency resource period or interval indication information, and/or, is removed from the CG resource pool and the second time-frequency resource period or interval indication information CGs with overlapping time-frequency resources indicated. In addition, the second SCI may include: an indication of a period or interval corresponding to the reserved resources of the UE, and/or an indication of the period or interval of the CG selected by the UE.

In addition, in the case that the first SCI includes an indication of a reserved resource period or interval, and/or an indication of a CG period, the UE removes a period value from the CG resource pool that is greater than the period corresponding to the user equipment. The CG of the reserved resource period or interval. And the second SCI may include the period of the CG selected by the UE, and/or the time-frequency resources of the selected CG, and/or the period or interval of the reserved resources corresponding to the UE.

Hereinafter, specific examples, embodiments, and the like according to the present invention will be described in detail. In addition, as mentioned above, the example, the Example, etc. which are described in this disclosure are illustrative descriptions for easy understanding of this invention, and do not limit this invention.

[Example 1]

FIG. 4 is a schematic diagram illustrating a basic process of a method performed by a user equipment according to Embodiment 1 of the present invention.

Hereinafter, the method executed by the user equipment according to Embodiment 1 of the present invention will be described in detail with reference to the basic process diagram shown in FIG. 4 .

As shown in FIG. 4 , in Embodiment 1 of the present invention, the steps performed by the user equipment include:

In step S101, the user equipment monitors the first sideline communication control information SCI sent by other user equipments. The first SCI includes a sequence number (index) of a Configured grant (CG) of a configuration scheduling grant.

In step S102, the user equipment removes (excludes) the CG that overlaps (overlaps) the CG corresponding to the CG sequence number included in the first SCI from the CG resource pool (CG pool). Overlapping means that time domain and frequency domain resources partially overlap or completely overlap. The user equipment selects an unused CG in the CG resource pool.

Optionally, the condition for the user equipment to remove the CG from the CG resource pool includes but is not limited to the following condition: the CG corresponding to the CG sequence number included in the first SCI overlaps (overlap). That is to say, the conditions for the user equipment to remove the CG from the CG resource pool may also include other conditions (and satisfy other conditions at the same time).

In step S103, the user equipment sends the second SCI. The second SCI includes the serial number of the CG selected by the user equipment.

Optionally, in step S102 of Embodiment 1 of the present invention, another possible implementation is that if a certain CG in the CG resource pool overlaps with the CG corresponding to the CG sequence number included in the first SCI, Then the user equipment determines that the CG is a used CG. Overlapping means that time domain and frequency domain resources partially overlap or completely overlap. The user equipment selects an unused CG in the CG resource pool. Optionally, the condition for the user equipment to determine that the CG is the used CG includes, but is not limited to, the following condition: the CG corresponding to the CG sequence number included in the first SCI overlaps (overlap). That is to say, the condition for the user equipment to determine that the CG is the used CG may also include other conditions (and satisfy other conditions at the same time).

Optionally, in step S102 of Embodiment 1 of the present invention, for the CG corresponding to the CG serial number included in the first SCI, a specific implementation is the CG with the same serial number, and another specific implementation is The method is as follows: assuming that the CG sequence number included in the first SCI is represented as m, it represents the mth or m+1th CG in the user equipment CG resource pool. Specific implementations include but are not limited to the above two specific implementations.

[Example 2]

FIG. 5 is a schematic diagram illustrating a basic process of a method performed by a user equipment according to Embodiment 2 of the present invention.

Hereinafter, the method executed by the user equipment according to Embodiment 2 of the present invention will be described in detail with reference to the basic process diagram shown in FIG. 5 .

As shown in FIG. 5 , in Embodiment 2 of the present invention, the steps performed by the user equipment include:

In step S201, the user equipment monitors the first sideline communication control information SCI sent by other user equipments. The first SCI includes a sequence number (index) of a Configured Grant (CG), and/or reserved resource interval indication information.

In step S202, the user equipment removes (excludes) CGs that overlap with the CGs corresponding to the CG sequence numbers included in the first SCI from the CG resource pool (CG pool), and/or the user equipment CGs that overlap with the time-frequency resources indicated by the reserved resource interval indication information included in the first SCI are excluded from the CG resource pool (CG pool). Overlapping means that time domain and frequency domain resources partially overlap or completely overlap. The user equipment selects an unused CG in the CG resource pool.

Optionally, the condition for the user equipment to remove the CG from the CG resource pool includes but is not limited to the following condition: the CG corresponding to the CG sequence number included in the first SCI overlaps (overlap), and the first SCI The time-frequency resources indicated by the reserved resource interval indication information contained in the SCI overlap. That is to say, the conditions for the user equipment to remove the CG from the CG resource pool may also include other conditions (and satisfy other conditions at the same time).

In step S203, the user equipment sends the second SCI. The second SCI includes the sequence number of the CG selected by the user equipment, and/or an indication of a reserved resource interval corresponding to the user equipment.

Optionally, the indication of the reserved resource interval corresponding to the user equipment is indicated by an upper layer (a higher layer or an upper layer).

Optionally, in step S202 of the second embodiment of the present invention, another possible implementation is that if a certain CG in the CG resource pool overlaps with the CG corresponding to the CG serial number included in the first SCI, And/or, if a certain CG in the CG resource pool overlaps with the time-frequency resource indicated by the reserved resource interval indication information included in the first SCI, the user equipment determines that the CG is used. (used)CG. Overlapping means that time domain and frequency domain resources partially overlap or completely overlap. The user equipment selects an unused CG in the CG resource pool. Optionally, the condition for the user equipment to determine that the CG is the used CG includes, but is not limited to, the following conditions: the CG corresponding to the CG sequence number included in the first SCI overlaps (overlap), and the first SCI The time-frequency resources indicated by the reserved resource interval indication information contained in overlap with each other. That is to say, the condition for the user equipment to determine that the CG is the used CG may also include other conditions (and satisfy other conditions at the same time).

Optionally, in step S202 of the second embodiment of the present invention, for the CG corresponding to the CG serial number included in the first SCI, a specific implementation is the CG with the same serial number, and another specific implementation is The method is as follows: assuming that the CG sequence number included in the first SCI is represented as m, it represents the mth or m+1th CG in the user equipment CG resource pool. Specific implementations include but are not limited to the above two specific implementations.

[Example 3]

FIG. 6 is a schematic diagram illustrating a basic process of a method performed by a user equipment according to Embodiment 3 of the present invention.

Hereinafter, the method executed by the user equipment according to Embodiment 3 of the present invention will be described in detail with reference to the basic process diagram shown in FIG. 6 .

As shown in FIG. 6 , in Embodiment 3 of the present invention, the steps performed by the user equipment include:

In step S301, the user equipment monitors the first sideline communication control information SCI sent by other user equipments. The first SCI includes reserved resource interval indication information.

In step S302, the user equipment removes (excludes) CGs that overlap with the time-frequency resources indicated by the reserved resource interval indication information included in the first SCI from a CG resource pool (CG pool). Overlapping means that time domain and frequency domain resources partially overlap or completely overlap. The user equipment selects an unused CG in the CG resource pool.

Optionally, the condition for the user equipment to remove the CG from the CG resource pool includes but is not limited to the following condition: overlapping with the time-frequency resource indicated by the reserved resource interval indication information included in the first SCI. That is to say, the conditions for the user equipment to remove the CG from the CG resource pool may also include other conditions (and satisfy other conditions at the same time).

In step S303, the user equipment sends the second SCI. The second SCI includes an indication of a reserved resource interval corresponding to the user equipment.

Optionally, the indication of the reserved resource interval corresponding to the user equipment is indicated by an upper layer (a higher layer or an upper layer).

Optionally, in step S302 of Embodiment 3 of the present invention, another possible implementation is that if a certain CG in the CG resource pool is indicated by the reserved resource interval indication information included in the first SCI time-frequency resources overlap, the user equipment determines that the CG is a used CG. Overlapping means that time domain and frequency domain resources partially overlap or completely overlap. The user equipment selects an unused CG in the CG resource pool. Optionally, the condition for the user equipment to determine that the CG is the used CG includes, but is not limited to, the following condition: overlapping with the time-frequency resource indicated by the reserved resource interval indication information included in the first SCI. That is to say, the condition for the user equipment to determine that the CG is the used CG may also include other conditions (and satisfy other conditions at the same time).

[Example 4]

FIG. 7 is a schematic diagram showing the basic process of the method executed by the user equipment according to the fourth embodiment of the present invention.

Hereinafter, the method executed by the user equipment according to Embodiment 4 of the present invention will be described in detail with reference to the basic process diagram shown in FIG. 7 .

As shown in FIG. 7 , in Embodiment 4 of the present invention, the steps performed by the user equipment include:

In step S401, the user equipment monitors the first sideline communication control information SCI sent by other user equipments. The first SCI includes an indication of a time-frequency resource, and/or indication information of a period (period) or an interval (interval) of the time-frequency resource.

Optionally, the time-frequency resources may be reserved resources, or may be CG resources.

In step S402, the user equipment removes (excludes) CGs that overlap with the time-frequency resources indicated by the time-frequency resource period or interval indication information included in the first SCI from the CG resource pool (CG pool). Overlapping means that time domain and frequency domain resources partially overlap or completely overlap. The user equipment selects an unused CG in the CG resource pool.

Optionally, the condition for the user equipment to remove the CG from the CG resource pool includes but is not limited to the following condition: overlapping with the time-frequency resource indicated by the time-frequency resource period or interval indication information included in the first SCI. . That is to say, the conditions for the user equipment to remove the CG from the CG resource pool may also include other conditions (and satisfy other conditions at the same time).

In step S403, the user equipment sends the second SCI. The second SCI includes an indication of a time-frequency resource, and/or an indication of a period or interval of the time-frequency resource.

Optionally, the time-frequency resources may be reserved resources corresponding to the user equipment, or resources of the CG selected by the user equipment.

Optionally, the indication of the reserved resource interval corresponding to the user equipment is indicated by an upper layer (a higher layer or an upper layer).

Optionally, in step S402 of Embodiment 4 of the present invention, another possible implementation is that if a certain CG in the CG resource pool and the time-frequency resource period or interval indication information included in the first SCI If the indicated time-frequency resources overlap, the user equipment determines that the CG is a used CG. Overlapping means that time domain and frequency domain resources partially overlap or completely overlap. The user equipment selects an unused CG in the CG resource pool. Optionally, the condition for the user equipment to determine that the CG is the used CG includes but is not limited to the following condition: overlapping with the time-frequency resource indicated by the time-frequency resource period or interval indication information included in the first SCI. That is to say, the condition for the user equipment to determine that the CG is the used CG may also include other conditions (and satisfy other conditions at the same time).

[Example 5]

FIG. 8 is a schematic diagram illustrating a basic process of a method performed by a user equipment according to Embodiment 5 of the present invention.

Hereinafter, the method executed by the user equipment according to Embodiment 5 of the present invention will be described in detail with reference to the basic process diagram shown in FIG. 8 .

As shown in FIG. 8 , in Embodiment 5 of the present invention, the steps performed by the user equipment include:

In step S501, the user equipment monitors the first sideline communication control information SCI sent by other user equipments. The first SCI includes period or interval indication information of the first time-frequency resource, and/or period (period) or interval (interval) indication information of the second time-frequency resource.

Optionally, the first time-frequency resources may be reserved resources, or may be CG resources.

Optionally, the second time-frequency resources may be reserved resources, or may be CG resources.

In step S502, the user equipment removes (excludes) from the CG resource pool (CG pool) the time-frequency resources that overlap with the time-frequency resources indicated by the first time-frequency resource period or interval indication information included in the first SCI The CG, and/or the user equipment, is excluded from the CG resource pool (CG pool), and the time-frequency resources indicated by the second time-frequency resource period or interval indication information included in the first SCI are excluded. Overlapping CG. Overlapping means that time domain and frequency domain resources partially overlap or completely overlap. The user equipment selects an unused CG in the CG resource pool.

Optionally, the condition for the user equipment to remove the CG from the CG resource pool includes but is not limited to the following conditions: the same as the time-frequency resource indicated by the first time-frequency resource period or interval indication information included in the first SCI. overlap with the time-frequency resource indicated by the second time-frequency resource period or interval indication information included in the first SCI. That is to say, the conditions for the user equipment to remove the CG from the CG resource pool may also include other conditions (and satisfy other conditions at the same time).

In step S503, the user equipment sends the second SCI. The second SCI includes an indication of the period or interval corresponding to the reserved resources of the user equipment, and/or an indication of the period or interval of the CG selected by the user equipment.

Optionally, the indication of the reserved resource interval corresponding to the user equipment is indicated by an upper layer (a higher layer or an upper layer).

Optionally, in step S502 of Embodiment 5 of the present invention, another possible implementation is that if a certain CG in the CG resource pool and the first time-frequency resource period or interval included in the first SCI The time-frequency resources indicated by the indication information overlap, and/or if a certain CG in the CG resource pool and the time-frequency resource period or interval indicated by the second time-frequency resource period or interval indication information included in the first SCI If the resources overlap, the user equipment determines that the CG is a used CG. Overlapping means that time domain and frequency domain resources partially overlap or completely overlap. The user equipment selects an unused CG in the CG resource pool. Optionally, the condition for the user equipment to determine that the CG is the used CG includes, but is not limited to, the following condition: the condition is the same as the time-frequency resource indicated by the first time-frequency resource period or interval indication information included in the first SCI. Overlapping, overlapping with the time-frequency resource indicated by the second time-frequency resource period or interval indication information included in the first SCI. That is to say, the condition for the user equipment to determine that the CG is the used CG may also include other conditions (and satisfy other conditions at the same time).

[Example 6]

In Embodiment 6 of the present invention, the steps performed by the user equipment include:

In step S601, the user equipment monitors the first sideline communication control information SCI sent by other user equipments. The first SCI includes reserved resource period (period) or interval (interval) indication information, and/or an indication of a CG period.

In step S602, the user equipment sends the second SCI. The second SCI includes the period of the CG selected by the user equipment, and/or the time-frequency resources of the selected CG, and/or the period or interval of the reserved resources corresponding to the user equipment.

Optionally, the period of the reserved resources corresponding to the user equipment is indicated by an upper layer (a higher layer or an upper layer).

[Embodiment 7]

In Embodiment 7 of the present invention, the steps performed by the user equipment include:

In step S701, the user equipment monitors the first sideline communication control information SCI sent by other user equipments. The first SCI includes reserved resource period (period) or interval (interval) indication information, and/or an indication of a CG period.

In step S702, the user equipment removes (excludes) CGs whose period value is greater than the period or interval of the reserved resources corresponding to the user equipment from the CG resource pool (CG pool).

Optionally, the reserved resource period or interval corresponding to the user equipment is indicated by an upper layer (a higher layer or an upper layer).

Optionally, when the user equipment selects an unused (unused) CG, it is assumed that the period value is greater than the reserved resource period corresponding to the user equipment or the priority of the interval CG is lower than the period value is less than or equal to the corresponding user equipment. The priority of the CG for the reserved resource period or interval.

Optionally, the user equipment preferentially selects the period value equal to the CG corresponding to the reserved resource period or interval of the user equipment.

In step S703, the user equipment sends the second SCI. The second SCI includes the period of the CG selected by the user equipment, and/or the time-frequency resources of the selected CG, and/or the period or interval of the reserved resources corresponding to the user equipment.

Optionally, the period of the reserved resources corresponding to the user equipment is indicated by an upper layer (a higher layer or an upper layer).

[Embodiment 8]

In Embodiment 8 of the present invention, the steps performed by the user equipment include:

In step S801, the user equipment receives cell configuration information. The cell configuration information includes configuration information of the MCG, and/or configuration information of the SCG.

Optionally, the configuration information of the MCG includes the serving frequency of the MCG.

Optionally, the configuration information of the SCG includes the serving frequency of the SCG and/or the configuration information of the PSCell.

In step S802, if the frequency at which the user equipment performs sidelink communication is concerned, or equal to the serving frequency of the MCG (serving frequency of LTE), the user equipment selects the eNB as the synchronization source.

Optionally, the serving frequency of LTE includes the carrier frequency of PCell and/or SCell.

Optionally, if the frequency of the sidelink communication belongs to (concern), or is equal to the primary frequency, the user equipment selects the PCell as the synchronization reference cell (sync reference cell). Optionally, the user equipment is in an RRC connected state (RRC connected) in the PCell.

Optionally, if the frequency of the sidelink communication belongs to (concern), or is equal to the Secondary frequency, the user equipment selects a corresponding (concerned) secondary cell SCell as a synchronization reference cell (sync reference cell).

In step S803, if the frequency at which the user equipment performs sidelink communication is concerned, or is equal to the serving frequency of the SCG (serving frequency of the NR), the user equipment selects the gNB as the synchronization source.

Optionally, the serving frequency of the NR includes the carrier frequency of the PSCell and/or the SCell.

Optionally, if the frequency of the sidelink communication is concerned, or is equal to the serving frequency of the PSCell, the user equipment selects the PSCell as a synchronization reference cell (sync reference cell). Optionally, the user equipment is in an RRC connected state (RRC connected) in the PSCell.

Optionally, if the frequency of the sidelink communication is concerned, or is equal to the serving frequency of the SCell, the user equipment selects a corresponding (concerned) secondary cell SCell as a sync reference cell.

In step S804, if the frequency at which the user equipment performs sidelink communication does not belong to (or is not equal to) the serving frequency of LTE, and does not belong to (or is not equal to) the serving frequency of NR, then the user equipment preferentially selects the eNB as the synchronization source, alternatively, the gNB is preferentially selected as the synchronization source, alternatively, the user equipment assumes that the eNB and the gNB have the same priority.

Optionally, a complete alternative implementation of Embodiment 8 of the present invention is, if the NR sidelink UE is configured with NR SCG (IE: nr-SecondaryCellGroupConfig, or can be described as, in EN-DC), if the The sidelink UE selects the eNB as the synchronization source and if the frequency at which the sidelink UE performs sidelink communication concerns, or is equal to the Primary frequency, the user equipment selects the PCell as the sync reference cell. Optionally, if the sidelink UE selects the eNB as the synchronization source and if the frequency of the sidelink communication belongs to (concerned), or is equal to the Secondary frequency, then the user equipment selects the corresponding (concerned) secondary cell SCell as the synchronization reference Cell (sync reference cell). If the sidelink UE selects the gNB as the synchronization source and if the frequency at which the sidelink UE performs sidelink communication concerns, or is equal to the serving frequency of the PSCell, the user equipment selects the PSCell as the synchronization reference cell (sync reference cell) . Optionally, if the sidelink UE selects the gNB as the synchronization source and if the frequency of the sidelink communication belongs to (concern), or is equal to the serving frequency of the SCell, then the user equipment selects the corresponding (concerned) secondary cell SCell as the synchronization source. Reference cell (sync reference cell).

Optionally, another complete alternative implementation of Embodiment 8 of the present invention is that, if the sidelink UE is configured with an NR SCG (IE: nr-SecondaryCellGroupConfig, or can be described as in EN-DC), the base station uses the RRC Signaling configuration, or the user equipment is pre-configured (pre-configured), or pre-defined (pre-define) that the user equipment selects the eNB as the synchronization source, or the user equipment selects the gNB as the synchronization source.

[Example 9]

In Embodiment 9 of the present invention, the steps performed by the user equipment include:

In step S901, the user equipment receives the sidelink configuration information sent by the base station. The sidelink configuration information includes an indication of whether to feed back HARQ ACK, and/or PSFCH resource information fed back by HARQ.

Optionally, the user equipment determines whether to feed back the HARQ ACK according to pre-configured information, or the user equipment is pre-configured with information on whether to feed back the HARQ ACK.

Optionally, the user equipment is preconfigured with PSFCH resource information fed back by HARQ.

Optionally, the specific implementation manner of the indication of whether to feed back HARQ ACK and the information of whether to pre-configure to feed back HARQ ACK includes but is not limited to:

1) Configured through RRC signaling, or, a cell in pre-configured information; or,

2) Configure or pre-configure the PSFCH resource of HARQ ACK separately (additional or separate); optionally, the base station may configure or pre-configure the PSFCH resource of HARQ NACK separately for the user equipment.

In step S902, the user equipment determines the HARQ feedback resource according to the indication of whether to feed back the HARQ ACK and/or the PSFCH resource information fed back by the HARQ, and performs HARQ feedback. If the base station configures or the user equipment pre-configures to feed back HARQ ACK, or, if the user equipment indicates to feed back HARQ ACK, the user equipment performs HARQ ACK feedback and HARQ NACK feedback; otherwise, the user equipment performs HARQ NACK feedback.

Optionally, in step S901 of the ninth embodiment, an alternative implementation is that the user equipment receives and sends the indication information of the user equipment. The indication information includes an indication of whether to feed back HARQ ACK, and/or indication information of PSFCH resources fed back by HARQ. Wherein, the specific implementation manner of whether to feed back the indication information of HARQ ACK includes but is not limited to:

1) The PSCCH is the SCI indication, and possible implementations include the indication field indication in the SCI, or the CRC scrambling indication of the PSCCH; or,

2) The PSFCH resource indicating the HARQ ACK is indicated separately (additional or separate), indicating that the user equipment needs to feed back the HARQ ACK; or,

3) Indicated by a discovery message (Discovery Message), the discovery message may be carried in the PSDCH, or in the PSSCH, or in the PSCCH, or in the PSBCH.

or,

4) During the connection setup (connection setup or establishment) process, the sending user equipment indicates or coordinates (or negotiate) whether to feed back HARQ ACK through higher layer signaling (RRC signaling, or AS signaling).

[Example ten]

In Embodiment 10 of the present invention, the steps performed by the user equipment include:

In step S1001, the user equipment receives the sidelink configuration information sent by the base station. The sidelink configuration information includes an indication of whether to feed back HARQ ACK, and/or PSFCH resource information fed back by HARQ.

Optionally, the user equipment determines whether to feed back the HARQ ACK according to pre-configured information, or the user equipment is pre-configured with information on whether to feed back the HARQ ACK.

Optionally, the user equipment is preconfigured with PSFCH resource information fed back by HARQ.

Optionally, the specific implementation manners of the indication of whether to feed back HARQ ACK and the information of whether to pre-configure to feed back HARQ ACK include but are not limited to:

1) Configured through RRC signaling, or, a cell in pre-configured information; or,

2) Configure or pre-configure the PSFCH resource of HARQ ACK separately (additional or separate); optionally, the base station may configure or pre-configure the PSFCH resource of HARQ NACK separately for the user equipment.

In step S1002, the user equipment receives and sends the indication information of the user equipment. The indication information includes an indication of whether to feed back HARQ ACK, and/or indication information of PSFCH resources fed back by HARQ. Wherein, the specific implementation manner of whether to feed back the indication information of HARQ ACK includes but is not limited to:

1) The PSCCH is the SCI indication, and possible implementations include the indication field indication in the SCI, or the CRC scrambling indication of the PSCCH; or,

2) The PSFCH resource indicating the HARQ ACK is indicated separately (additional or separate), indicating that the user equipment needs to feed back the HARQ ACK; or,

3) Indicated by a discovery message (Discovery Message), the discovery message may be carried in the PSDCH, or in the PSSCH, or in the PSCCH, or in the PSBCH.

or,

4) During the connection setup (connection setup or establishment) process, the sending user equipment indicates or coordinates (or negotiate) whether to feed back HARQ ACK through higher layer signaling (RRC signaling, or AS signaling).

In step S1003, if the base station configures or preconfigures the user equipment to feed back HARQ ACK, and the sending user equipment instructs the user equipment to feed back HARQ ACK, then the user equipment performs HARQ ACK feedback and HARQ NACK feedback. Otherwise, the user equipment performs HARQ NACK feedback.

[Example 11]

In Embodiment 11 of the present invention, the steps performed by the user equipment include:

In step S1101, for example, configuration information related to the initial BWP sent by the gNB is received. For example, the initial resource block of the carrier where the initial BWP sent by the gNB is located, and the offset of the initial BWP relative to the initial resource block of the carrier are received.

Optionally, the configuration information related to the initial BWP may be all UE-specific configuration information, or all cell-specific configuration information, or part of UE-specific configuration information and part of cell-specific configuration information.

Optionally, the initial resource block can be configured through the parameter offsetToCarrier in the SCS-SpecificCarrier IE; other configuration information of the carrier where the initial BWP is located can also be configured through the parameters in the SCS-SpecificCarrier IE, for example , the subcarrier spacing of the carrier where the initial BWP is located is configured by the parameter subcarrierSpacing in the SCS-SpecificCarrier IE.

Optionally, if the initial BWP is the initial downlink BWP, the SCS-SpecificCarrier IE may be included in the parameter downlinkChannelBW-PerSCS-List in the ServingCellConfig IE.

Optionally, if the initial BWP is the initial uplink BWP, the SCS-SpecificCarrier IE may be included in the uplinkChannelBW-PerSCS-List in the parameter uplinkConfig in the ServingCellConfig IE.

Optionally, the offset of the initial BWP relative to the initial resource block of the carrier may be configured through the parameter locationAndBandwidth, or through the parameter location, or through a parameter with another name. Optionally, the parameter locationAndBandwidth may represent a resource indicator value (RIV), and the RIV corresponds to a resource block offset RB _start and a length L _RB . The resource block offset RB _start is used to indicate the offset of the initial BWP relative to the starting resource block of the carrier. Optionally, the parameter location may represent a resource block offset RB _start . The parameter can be in ServingCellConfig IE, ServingCellConfig->the parameter,

Or, in the IE (for example, BWP) corresponding to the parameter (for example, initialDownlinkBWP) in ServingCellConfig IE, the specific configuration method is ServingCellConfig->initialDownlinkBWP->the parameter,

Or, in the IE (for example, BWP-DownlinkCommon) corresponding to the parameter in the ServingCellConfig IE (for example, initialDownlinkBWP), the specific configuration method is ServingCellConfig->initialDownlinkBWP->genericParameters->The parameter,

Or, in the IE (for example, BWP) corresponding to the parameter (for example, bwp) in the ServingCellConfig IE, the specific configuration method is ServingCellConfig->bwp->the parameter,

Or, in the IE (for example, BWP) corresponding to the parameter (for example, genericParameters) in ServingCellConfig IE, the specific configuration method is ServingCellConfig->genericParameters->the parameter,

Or, in the IE (for example, BWP-DownlinkCommon) corresponding to the parameter in the ServingCellConfig IE (for example, bwp-DownlinkCommon), the specific configuration method is ServingCellConfig->bwp-DownlinkCommon->genericParameters->The parameter,

Or, in the IE (for example, DownlinkConfigCommon) corresponding to the parameter (for example, downlinkConfigCommon) in the ServingCellConfig IE, the specific configuration method is ServingCellConfig->downlinkConfigCommon->initialDownlinkBWP->genericParameters->the parameter.

In step S1102, the initial resource block of the initial BWP is determined according to the configuration information related to the initial BWP.

For example, if the initial resource block of the carrier where the initial BWP is located is O _carrier (represented by a common resource block number), and the offset of the initial BWP relative to the initial resource block of the carrier is RB _start , then the The initial resource block of the initial BWP (represented by the public resource block number) is:

Optionally, in Embodiment 11 of the present invention, the resource block may be a common resource block CRB.

FIG. 9 is a block diagram showing a user equipment UE according to the present invention. As shown in FIG. 9 , the user equipment UE80 includes a processor 801 and a memory 802 . The processor 801 may include, for example, a microprocessor, a microcontroller, an embedded processor, or the like. The memory 802 may include, for example, volatile memory (eg, random access memory RAM), a hard disk drive (HDD), non-volatile memory (eg, flash memory), or other memory, or the like. Program instructions are stored on the memory 802 . When the instructions are executed by the processor 801, the above method described in detail in the present invention and executed by the user equipment can be executed.

The method and related apparatus of the present invention have been described above with reference to the 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 under the condition that no contradiction occurs. The method of the present invention is not limited to the steps and sequences shown above. The network node 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 and not restrictive, and the present invention is not limited to the specific information elements exemplified by these identifiers. Numerous changes and modifications may occur to those skilled in the art in light of the teachings of the illustrated embodiments.

It should be understood that the above-described embodiments of the present invention may be implemented by software, hardware, or a combination of both. For example, the various components inside the base station and the user equipment in the above embodiments may be implemented by various devices, including but not limited to: analog circuit devices, digital circuit devices, digital signal processing (DSP) circuits, programmable processing Controllers, Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs), Programmable Logic Devices (CPLDs), etc.

In this application, "base station" may refer to a mobile communication data and control switching center with larger transmission power and wider coverage area, including functions such as resource allocation and scheduling, data reception and transmission, and the like. "User equipment" may refer to a user mobile terminal, for example, including a mobile phone, a notebook, and other terminal equipment that can 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 a product having a computer-readable medium on which computer program logic is encoded that, when executed on a computing device, provides relevant operations to achieve The above technical solutions of the present invention. When executed on at least one processor of a computing system, computer program logic causes the processor to perform the operations (methods) described in the embodiments of the present invention. Such arrangements of the present invention are typically provided as software, code and/or other data structures arranged or encoded on a computer readable medium such as an optical medium (eg CD-ROM), floppy or hard disk, or such as one or more Firmware or other medium of microcode on a ROM or RAM or PROM chip, or a downloadable software image in one or more modules, a shared database, etc. 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 device and the terminal device used in each of the above embodiments may be implemented or executed by a circuit, which is usually one or more integrated circuits. Circuits designed to perform the various functions described in this specification may include general purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs) or general purpose integrated circuits, field programmable gate arrays (FPGAs) or other Program logic devices, discrete gate or transistor logic, or discrete hardware components, or any combination of the above. 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 digital circuits, or may be configured by logic circuits. In addition, when an advanced technology that can replace the current integrated circuit appears due to the advancement of semiconductor technology, the present invention can also use the integrated circuit obtained by using the advanced technology.

Although the present invention has been shown in conjunction with the preferred embodiments thereof, those skilled in the art will appreciate that various modifications, 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 (10)

1. A method performed by a user equipment UE, comprising: The UE monitors the first sideline communication control information SCI sent by other user equipment UEs; removing the used configuration scheduling grant CG from the configuration scheduling grant CG resource pool based on the first SCI; and The UE selects an unused CG in the CG resource pool, and sends a second SCI. 2. The method of claim 1, wherein, The first SCI includes: the CG sequence number, and/or the first reserved resource interval indication information, The UE removes, from the CG resource pool, the CG that overlaps with the CG corresponding to the CG sequence number, and/or removes from the CG resource pool the CG that overlaps with the first reserved resource interval indication information. The indicated CGs with overlapping time-frequency resources. 3. The method of claim 2, wherein, The second SCI includes: the sequence number of the CG selected by the UE, and/or a second reserved resource interval indication corresponding to the UE. 4. The method of claim 1, wherein, The first SCI includes: indication information of the time-frequency resource, and indication information of the time-frequency resource period or interval, The UE removes, from the CG resource pool, a CG that overlaps with the time-frequency resource indicated by the time-frequency resource period or interval indication information. 5. The method of claim 4, wherein, The second SCI includes: an indication corresponding to the time-frequency resource of the UE, and/or an indication of the period or interval of the time-frequency resource corresponding to the UE. 6. The method of claim 1, wherein, The first SCI includes: first time-frequency resource period or interval indication information, and/or second time-frequency resource period or interval indication information, The UE removes from the CG resource pool a CG that overlaps with the time-frequency resource indicated by the first time-frequency resource period or interval indication information, and/or removes from the CG resource pool The CG in which the time-frequency resources indicated by the second time-frequency resource period or interval indication information overlap. 7. The method of claim 6, wherein, The second SCI includes: an indication of the period or interval corresponding to the reserved resources of the UE, and/or an indication of the period or interval of the CG selected by the UE. 8. The method of claim 1, wherein, The first SCI includes an indication of a reserved resource period or interval, and/or an indication of a CG period, The UE removes a CG whose period value is greater than the period or interval of the reserved resources corresponding to the user equipment from the CG resource pool, The second SCI includes the period of the CG selected by the UE, and/or the time-frequency resources of the selected CG, and/or the period or interval corresponding to the reserved resources of the UE. 9. The method of claim 7 or 8, wherein, The overlapping indicates that time domain and frequency domain resources partially overlap or completely overlap, The period or interval of the reserved resources corresponding to the UE is indicated by the upper layer. 10. A user equipment UE, comprising: processor; and memory, storing instructions; wherein the instructions, when executed by the processor, perform the method of any one of claims 1 to 9.

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