CN112398602A

CN112398602A - Method performed by user equipment and user equipment

Info

Publication number: CN112398602A
Application number: CN201910742113.1A
Authority: CN
Inventors: 罗超; 刘仁茂; 赵毅男
Original assignee: Sharp Corp
Current assignee: Sharp Corp
Priority date: 2019-08-12
Filing date: 2019-08-12
Publication date: 2021-02-23
Also published as: WO2021027833A1

Abstract

The invention provides a method executed by user equipment and the user equipment, wherein the method comprises the following steps: a step of acquiring configuration information related to a straight-ahead operation; and executing one or more straight-line operations according to the configuration information related to the straight-line operations. By indicating the downlink synchronization information in the SL carrier configuration, the UE may determine the state of the target cell corresponding to the downlink synchronization information through downlink synchronization and/or measurement, and so on, so as to perform other necessary SL operations related to the target cell.

Description

Method performed by user equipment and user equipment

Technical Field

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

Background

In LTE V2X (see non-patent document 1 and non-patent document 2), if a UE is configured to be in a single SL (linear) carrier (note that its carrier center frequency is F)_SL) Performs SL operation, the UE can use F through measurement_SLAn LTE cell, which is an UL (uplink) carrier, determines whether it is in-coverage (in-coverage) or out-of-coverage (out-of-coverage) state.

To measure the LTE cell, the UE needs to know the center frequency (denoted as downlink) of the DL (downlink) carrier of the cellF_DL). For TDD cells, F_DL＝F_SL(ii) a For FDD cell, F_DL＝F_SL+ S, where S is the transmit-receive interval (TX-RX separation). See fig. 1. The frequency location of the signals/channels related to cell search/synchronization (i.e., PSS, SSS, and PBCH) in an LTE cell may be in accordance with F_DLDirectly determining; after detecting/reading PSS, SSS, and PBCH, the UE may further determine the time-frequency location of the reference signal that needs to be measured. Fig. 1 is a diagram showing the relationship between the frequency positions of SL, UL and DL carriers in LTE V2X.

In 5G NR (see non-patent document 1, hereinafter abbreviated as 5G, or NR), and 5G V2X constructed based on5G (see non-patent document 4), different from LTE:

a cell may be configured with one DL carrier and one UL carrier, and may also be configured with one SUL (supplemental uplink) carrier (note that its carrier center frequency is F)_SUL). The UE transmits on either the UL carrier or the SUL carrier, but not both. If the SUL carrier is configured as an SL carrier, the UE derives from the center frequency F of the SL carrier_SLThe center frequency F of the corresponding DL carrier cannot be determined_DL. See TDD + SUL part in fig. 2. Fig. 2 is a diagram showing the relationship among the frequency positions of SL, UL, SUL, and DL carriers in 5G V2X.

The location of PSS, SSS and PBCH (these three are organized together in a block-like manner on the time-frequency resources, commonly referred to collectively as SSB) and the center frequency of the DL carrier are independent. This means that even if the center frequency of the DL carrier is known (e.g., see FDD or TDD part in fig. 2), the frequency location of the SSB cannot be determined.

In addition, due to the introduction of the SUL, other problems are also introduced in the configuration of the SL carrier. For example, in a cell supporting SL operation, several SL carriers may be configured and how to determine whether a given SL carrier is on an UL carrier or a SUL carrier. As another example, how to determine whether TDD ul-dl configuration information of a cell supporting SL operation is applied to a SL carrier.

Prior art documents

Non-patent document

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

Non-patent document 2: RP-170798, New WID on 3GPP V2X Phase2

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

Non-patent document 4: RP-190766, New WID on5G V2X with NR sidelink

Disclosure of Invention

To address at least some of the above issues, the present invention provides a method performed by a user equipment and a user equipment.

According to the invention, a method performed by a user equipment is proposed, comprising:

a step of acquiring configuration information related to a straight-ahead operation; and

and executing one or more straight-line operations according to the configuration information related to the straight-line operations.

In the method performed by the user equipment, the configuration information related to the direct operation may include configuration information of a direct carrier and configuration information of a reference downlink.

In the method performed by the user equipment, the direct operation may include at least one of the following operations:

determining a reference cell corresponding to the reference downlink configuration information;

determining downlink synchronization information and/or information related to cell measurement of the reference cell;

determining a cell used as a synchronization reference source;

a cell for direct communication is determined.

In addition, according to the present invention, a method performed by a user equipment is also provided, where the method includes:

a step of acquiring configuration information of a direct traveling cell related to a direct traveling operation; and

determining one or more parameters of one or two direct carriers of the direct cell.

In the method performed by the user equipment, the configuration information related to the direct operation may include configuration information of one direct carrier or configuration information of two direct carriers.

In the method performed by the user equipment, for each of the direct carriers, i.e. C_SLAt least one of the following operations may be performed:

determining a direct line carrier C_SLWhether the associated carrier is an uplink carrier or a supplemental uplink carrier;

determining the C_SLAssociated subcarrier spacing specific carrier C_XL；

Determining the C_SLOne or more parameters of (a).

In the method performed by the user equipment, the configuration information related to the direct operation may include at least one of the following:

the direct carriers associated with the uplink carriers are

Configuration information of (2);

complementing the direct carriers with which the uplink carriers are associated

The configuration information of (1).

In the method performed by the user equipment, at least one of the following operations may also be performed:

determining an uplink carrier (C) of the direct cell when the direct cell is configured with the uplink carrier_ULThe corresponding sub-carriers are separated by specific carriers;

determining the

One or more parameters of (a);

determining a supplementary uplink carrier (C) of the direct cell when the direct cell is configured with the supplementary uplink carrier_SULThe corresponding sub-carriers are separated by specific carriers;

determining the

One or more parameters of (a).

In the method performed by the user equipment, part or all of the configuration information related to the direct operation may also be included in the master information block of the direct cell or included in one or more system information blocks of the direct cell.

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

According to the present invention, by indicating the downlink synchronization information in the SL carrier configuration, the UE may determine the state of the target cell corresponding to the downlink synchronization information through downlink synchronization and/or measurement, etc., so as to perform other necessary SL operations related to the target cell, for example, determine the coverage state of the SL link, for example, determine whether the target cell may be used as a synchronization reference source, for example, determine whether the target cell may be used for SL communication, etc.

In addition, according to the present invention, by indicating in the system information whether each configured SL carrier is associated with an UL carrier or an SUL carrier of a corresponding cell, the SL carrier may share some or all of the parameters with the UL carrier or the SUL carrier, thereby making it possible to perform SL operation and conventional Uu port operation at the same time.

In addition, according to the present invention, SL carriers respectively associated with UL carriers and/or SUL carriers of a corresponding cell are indicated in system information, so that the SL carriers can share part or all of parameters with the UL carriers or the SUL carriers, thereby making it possible to simultaneously perform SL operation and conventional Uu port operation.

Drawings

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

fig. 1 shows the relationship between the frequency positions of SL, UL and DL carriers in LTE V2X.

Fig. 2 shows the relationship between the frequency positions of SL, UL, SUL and DL carriers in 5G V2X.

Fig. 3 shows a flowchart of a method performed by a user equipment according to a first embodiment of the invention.

Fig. 4 shows a flow chart of a method performed by a user equipment according to a second embodiment of the invention.

Fig. 5 shows a flow chart of a method performed by a user equipment according to a third embodiment of the invention.

Fig. 6 shows a flowchart of a method performed by a user equipment according to a fourth embodiment of the invention.

Fig. 7 shows a flowchart of a method performed by a user equipment according to an embodiment of the invention.

Fig. 8 shows a block diagram of a user equipment UE to which the present invention relates.

Detailed Description

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

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

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

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

AS: access Stratum, Access Stratum

BWP: bandwidth Part, Bandwidth fragment

CA: carrier Aggregation, Carrier Aggregation

CCE: control-channel element, control-channel element

CORESET: control-resource set, control resource set

And (3) CP: cyclic Prefix, Cyclic Prefix

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

CRB: common Resource Block, Common Resource Block

CRC: cyclic Redundancy Check (crc)

CSI: channel-state Information, Channel state Information

CSS: common Search Space, Common Search Space

DC: dual Connectivity, Dual Connectivity

DCI: downlink Control Information, Downlink Control Information

DFN: direct Frame Number, Direct Frame Number

DFT-s-OFDM: discrete Fourier transform Spread Orthogonal Frequency Division Multiplexing

DL: downlink, Downlink

DL-SCH: downlink Shared Channel, Downlink Shared Channel

DM-RS: demodulation reference signal, Demodulation reference signal

eMBB: enhanced Mobile Broadband communications

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

E-UTRAN: evolved UMTS Terrestrial Radio Access Network

FDD: frequency Division Duplex, Frequency Division Duplex

FDRA: frequency Domain Resource Assignment, Frequency Domain Resource allocation

FR 1: frequency Range1, Frequency Range1

FR 2: frequency Range1, Frequency Range2

GLONASS: global NAvigation Satellite System (GNSS)

And g NB: NR Node B, NR Node B

GNSS: g1 object Navigation Satellite System, Global Navigation Satellite System

GPS: global Positioning System (GPS)

HARQ: hybrid Automatic Repeat Request (HARQ)

ID: identity, Identifier

IE: information Element, Information Element

IP: internet Protocol (IP)

LCID: logical Channel ID, Logical Channel identifier

LTE: long Term Evolution, Long Term Evolution

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

MAC: medium Access Control, Medium Access Control

MAC CE: MAC Control Element, MAC Control Element

MCG (calcium carbonate): master Cell Group, Master Cell Group

MIB: master Information Block, Master Information Block

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

MIB-SL-V2X: master Information Block-Sidelink-V2X, Master Information Block-Lot-V2X

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

mMTC: massive Machine Type Communication

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

NDI: new Data Indicator, New Data Indicator

NR: new Radio, New Radio

NUL: normal Uplink, Normal Uplink

OFDM: orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing

PBCH: physical Broadcast Channel, Physical Broadcast Channel

PDCCH: physical Downlink Control Channel, Physical Downlink Control Channel

PDCP: packet Data Convergence Protocol (PDMP)

PDSCH: physical Downlink Shared Channel (pdcch)

PSBCH: physical Sidelink Broadcast Channel, Physical direct Broadcast Channel

PSCCH: physical Sidelink control channel, Physical direct control channel

PSFCH: physical Sidelink Feedback Channel, Physical direct Feedback Channel

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

PRB: physical Resource Block, Physical Resource Block

PSS: primary Synchronization Signal, Primary Synchronization Signal

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

PSSS: primary Sidelink Synchronization Signal, Primary inline Synchronization Signal

PTAG: primary Timing Advance Group, Primary Timing Advance Group

PUSCH: physical downlink shared channel (PRCH)

PUCCH: physical downlink control channel, physical uplink control channel

QCL: quasi co-location of Quasi co-location

QoS: quality of Service

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

An RAR: random Access Response (RANDOM ACCESS RESPONSE)

RB: resource Block, Resource Block

RE: resource Element, Resource Element

REG: resource-element group, resource element group

RF: radio Frequency, Radio Frequency

RLC: radio Link Control, Radio Link Control protocol

RNTI: Radio-Network Temporary Identifier (RNTI)

RRC: radio Resource Control, Radio Resource Control

RV: redundancy Version of Reduncyny Version

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

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

S-PSS: sidelink Primary Synchronization Signal, straight Primary Synchronization Signal

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

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

SCG: secondary Cell Group, subcell Group

SCI: sidelink Control Information, straight-line Control Information

SCS: subcarrier Spacing, Subcarrier Spacing

SDAP: service Data Adaptation Protocol

SFN: system Frame Number, System Frame Number

SIB: system Information Block

SL: sidelink, straight

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

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

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

SL SS: sidelink synchronization Signal, direct line synchronization Signal

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

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

SL SSS: sidelink Secondary Synchronization Signal, direct auxiliary Synchronization Signal

SLSS: sidelink synchronization Signal, direct line synchronization Signal

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

SLSSID: sidelink Synchronization Signal Identity, direct line Synchronization Signal Identity

SpCell: special Cell, Special Cell

SRS: sounding Reference Signal

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

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

SSS: secondary Synchronization Signal, Secondary Synchronization Signal

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

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

SSSS: secondary Sidelink synchronous Signal, Secondary inline synchronous Signal

STAG: secondary Timing Advance Group, Secondary Timing Advance Group

SUL: supplement Uplink, supplement Uplink

TA: timing Advance, Timing Advance

TAG: timing Advance Group, Timing Advance Group

TB: transport Block

TCP: transmission Control Protocol, Transmission Control Protocol

TDD: time Division Duplex, Time Division Duplex

TPC: transmit power control, transmission power control

UE: user Equipment, User Equipment

UL: uplink, Uplink

UMTS: universal Mobile Telecommunications System, Universal Mobile communications System

URLLC: Ultra-Reliable and Low Latency Communication

And (3) USS: UE-specific Search Space, UE-specific Search Space

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

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

V2P: Vehicle-to-Pedestrian

V2V: Vehicle-to-Vehicle

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

VRB: virtual Resource Block, Virtual Resource Block

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

● the SL MIB (Sildelink Master Information Block) may be referred to as an S-MIB, or MIB-SL, or other name. Alternatively, when used for V2X service, the SL MIB refers to MIB-SL-V2X.

● SL PSS may also be referred to as S-PSS, or PSS-SL, or PSSS, or other names.

● SL SSS may also be referred to as S-SSS, or SSS-SL, or SSSS, or other names.

● SL SSB may also be referred to as S-SSB, or SSB-SL, or SSSB, or other names. Optionally, the SL SSB includes a SL PSS, a part or all of a SL SSS and a PSBCH. Optionally, the bandwidth of the SL SSB is 11 RBs.

● synchronous reference source (synchronization reference) may also be referred to as a synchronization reference (synchronization reference), or synchronous source (synchronization source).

● the frequency location of a subcarrier can be represented by a predefined frequency location related to the subcarrier, for example the location of the center frequency of the subcarrier.

● one UL (or DL, or SUL, or SL) carrier may support one or more SCS, where each SCS corresponds to one "SCS specific (SCS specific) carrier".

● the frequency location of an SCS-specific carrier may be defined by a predefined frequency location (denoted as f) within (or on) the carrier_C) And (4) showing. For example, if all subcarriers of the carrier are numbered from low to high in frequency, f_CMay be an offset with respect to the lowest numbered subcarrier (or lowest available subcarrier, or lowest subcarrier) of the carrier. Wherein the content of the first and second substances,

optionally, the offset f_CThe unit of (2) may be the number of subcarriers, or the number of RBs, or the number of RBGs, or the number of subchannels, or other units.

Optionally, all RBs of the carrier may be numbered from low to high in frequency. Wherein the content of the first and second substances,

optionally, the lowest numbered RB (or lowest available RB or lowest RB) of the carriers is numbered 0.

Optionally, the highest numbered RB (or highest available RB, or highest RB) of the carrier is numbered N_RB-1。

Optionally, the lowest numbered subcarrier of the carriers is numbered 0.

Optionally, the highest numbered subcarrier (or highest available subcarrier, or highest subcarrier) of the carriers is numbered N_SC-1。

OptionallyIf said offset f_CIf the unit of (d) is the number of subcarriers, f_CThe value of (a) may be one of the following:

○f_C＝0。

○f_C＝N_SC-1。

○

○

o if N_RBmod 2 is 0, then

If N is present_RBmod 2 is 1, then

○

○

Wherein N is_RBCarrier bandwidth of the carrier in units of the number of RBs, N_SCIs N_RBThe number of subcarriers corresponding to each RB. Alternatively, N_SC＝12·N_RB. Optionally, the carrier bandwidth of the carrier may also be referred to as a transmission bandwidth of the carrier.

● the frequency location of an SSB may be defined by a predefined frequency location (denoted as f) within (or on) the SSB_B) And (4) showing. For example, if all subcarriers of the SSB are numbered from low to high in frequency, f_BMay be an offset with respect to the lowest numbered subcarrier (or lowest available subcarrier, or lowest subcarrier) of the SSB. Wherein the content of the first and second substances,

optionally, the offset f_BThe unit of (2) may be the number of subcarriers, or the number of RBs, or the number of RBGs, or the number of subchannels, or other units.

Optionally, all RBs of the SSB may be numbered from low to high in frequency. Wherein the content of the first and second substances,

optionally, the lowest numbered RB (or lowest available RB or lowest RB) of the SSB is numbered 0.

Optionally, the highest numbered RB (or highest available RB, or highest RB) of the SSB is numbered as

Optionally, the lowest numbered subcarrier of the SSB is numbered 0.

Optionally, the highest numbered subcarriers (or highest available subcarriers, or highest subcarriers) of the SSBs are numbered as

Optionally, if the offset f_BIf the unit of (d) is the number of subcarriers, f_BThe value of (a) may be one of the following:

○f_B＝0。

○

○

○

o if

Then

If it is

Then

○

○

Wherein the content of the first and second substances,

is the bandwidth of the SSB in units of the number of RBs,

is that

The number of subcarriers corresponding to each RB. Alternatively,

alternatively,

optionally, the bandwidth of the SSB may also be referred to as a transmission bandwidth of the SSB.

[ example one ]

The method performed by the user equipment according to the first embodiment of the present invention is described below with reference to fig. 3.

Fig. 3 is a flowchart illustrating a method performed by a user equipment according to a first embodiment of the present invention.

As shown in fig. 3, in a first embodiment of the present invention, a user equipment UE performs the steps including: step S101 and step S103.

Specifically, in step S101, configuration information related to an SL (sidelink) operation is acquired. Wherein the content of the first and second substances,

● alternatively, the "configuration information related to SL operation" may contain configuration information for one or more SL carriers. Optionally, the configuration information of each of the one or more SL carriers may include one or more of the following:

a list of frequency bands (frequency bands) for SL (e.g., denoted by the parameter frequency band-SL). Wherein the content of the first and second substances,

optionally, each entry in the band list indicates one NR band (e.g. by the numbering of one NR band, e.g. by the freqbandindicator NR IE).

Optionally, one or more list items are included in the list.

Frequency position of A Point (Point A) for SL (noted as

). Wherein the content of the first and second substances,

optionally, the "a-point for SL" is one reference point defined in the frequency domain for defining and/or configuring and/or locating the frequency position of the SL carrier.

Optionally, the "frequency position of A Point for SL"

Can be represented by an absolute frequency position, for example by the parameter absoluteFrequencyPointA-SL. Wherein the content of the first and second substances,

optionally, the type of the parameter absolutefrequencyPointA-SL may be ARFCN-ValueNR.

Optionally, the "frequency position of A Point for SL"

May be represented by a relative frequency position, e.g. by an offset between a predefined absolute frequency position and the "point a for SL", whereinAlternatively, the predefined absolute frequency position may be determined according to the frequency band in which the SL carrier is located.

Configuration information of one or more SCS-specific SL carriers. Wherein each of the one or more SCS-specific SL carriers (denoted as

) May comprise one or more of the following:

frequency offset of SL carrier (denoted as Δ f)^SL). Wherein the content of the first and second substances,

optionally, the "frequency offset of the SL carrier" Δ f^SLDenotes the "frequency position of A Point for SL"

And said SCS specific SL carrier

Is determined (e.g., as indicated by the parameter offsetttocarrier-SL). Wherein the content of the first and second substances,

optionally, the frequency offset is expressed in number of RBs. At this time, optionally, the value of the parameter offsetToCarrier-SL may be one of the set {0, 1, …, 2199 }.

Optionally, the offset is expressed in number of RBGs.

Optionally, the offset is expressed in terms of the number of subcarriers.

Optionally, the biasThe shift is expressed by the number of subchannels (subchannels).

Optionally, the offset is expressed in Hz.

Optionally, the offset is expressed in kHz.

Optionally, the offset is expressed in MHz.

Optionally, the offset is expressed in GHz.

SCS of SL carrier (e.g. indicated by parameter subanticrierSpacing-SL).

The carrier bandwidth of the SL carrier (e.g., as indicated by the parameter carrier bandwidth-SL). Wherein the content of the first and second substances,

optionally, the carrier bandwidth is expressed in number of RBs. At this time, optionally, the value of the parameter carrier bandwidth-SL may be one of the set {1, 2, …, 275 }.

Optionally, the carrier bandwidth is expressed in number of RBGs.

Optionally, the carrier bandwidth is expressed in number of subcarriers.

Optionally, the carrier bandwidth is expressed in terms of a number of subchannels.

Optionally, the carrier bandwidth in Hz, kHz, MHz or GHz etc. is determined by the parameter carrierBandwidth-SL and the parameter subcarrierSpacing-SL.

Refer to configuration information of the DL. Wherein, optionally, the "reference DL" corresponds to a DL carrier of one reference cell; optionally, the "configuration information of the reference DL" may include one or more of the following:

frequency location of point A for reference DL (note as

). Wherein the content of the first and second substances,

optionally, said "point a for reference DL" is a reference point defined in the frequency domain for defining and/or configuring and/or locating other frequency locations related to the reference DL.

Optionally, the "frequency position of A Point for reference DL"

Can be represented by an absolute frequency position, for example by the parameter absoluteFrequencyPointA-DL. Wherein the content of the first and second substances,

alternatively, the type of the parameter absolutefreqycpointa-DL may be ARFCN-ValueNR.

Optionally, the "frequency position of A Point for reference DL"

May be represented by a relative frequency position, e.g. by an offset between a predefined absolute frequency position and the "point a for reference DL", wherein optionally the predefined absolute frequency position may be determined in dependence of the frequency band in which the "point a for reference DL" is located.

Reference to frequency location of SSB (note as

). Wherein the content of the first and second substances,

optionally, the "frequency location of reference SSB"

Can be represented by an absolute frequency location, for example by the parameter absoluteFrequencySSB-DL. Wherein the content of the first and second substances,

alternatively, the type of the parameter absoluteFrequencySSB-DL may be ARFCN-ValueNR.

Alternatively, the parameter absoluteFrequencySSB-DL may be in Hz, or kHz, or MHz, or GHz, or other units.

Optionally, the "frequency location of reference SSB"

May be represented by a relative frequency position, for example by the parameter offsetttossb-DL. Wherein the content of the first and second substances,

alternatively, the parameter offsetttossb-DL may represent a predefined or preconfigured or configured frequency position and the "frequency position of the reference SSB"

E.g., the offset between the "a point for reference DL" and the frequency location of the reference SSB. Wherein the content of the first and second substances,

optionally, the offset is expressed in number of RBs. At this time, optionally, the value of the parameter offsetttossb-DL may be one value in the set {0, 1, …, 2199 }.

Optionally, the offset is expressed in number of RBGs.

Optionally, the offset is expressed in terms of the number of subcarriers.

Optionally, the offset is expressed in terms of a number of subchannels.

Optionally, the offset is expressed in Hz.

Optionally, the offset is expressed in kHz.

Optionally, the offset is expressed in MHz.

Optionally, the offset is expressed in GHz.

Alternatively, the parameter offsetttossb-DL may also be replaced by two parameters: offset tossb-RB-DL and offset tossb-SC-DL, wherein offset tossb-RB-DL denotes a frequency offset between the "a point for reference DL" and the lowest numbered subcarrier of one reference RB, and offset tossb-SC-DL denotes an offset between the lowest numbered subcarrier of the reference RB and the frequency position of the reference SSB.

Reference to SCS of SSB (e.g., denoted by parameter ssbSubcarrierspacing-DL).

Reference is made to the period of the SSB (e.g., as indicated by the parameter SSB-periodicity-DL).

Wherein the content of the first and second substances,

optionally, the value of the period may be one of the set 5, 10, 20, 40, 80, 160.

Optionally, the unit of the period may be milliseconds.

Optionally, the unit of the period may be seconds.

The "reference SSB" may or may not be a CD-SSB (Cell Defining SSB) of the reference Cell.

● alternatively, some or all of the "configuration information related to SL operation" may be contained in an RRC message or a PC5RRC message. For example, in the MIB, as well as in the SIB, as well as in the SL MIB, as well as in the PSBCH payload (PSBCH payload), as well as in the SL-reconfiguration IE, as well as in the SL-V2X-reconfiguration IE.

● alternatively, some or all of the "configuration information related to SL operation" may be contained in the MAC CE.

Further, in step S103, one or more SL operations are performed.

Wherein the content of the first and second substances,

● optionally, the SL operation is performed on some or all of the one or more SL carriers corresponding to the "configuration information related to SL operation". Wherein optionally a higher layer protocol of the UE (e.g. one above the RRC layer) configures on which frequency or frequencies the UE receives or transmits; optionally, the UE determines corresponding SL carriers according to the configured one or more frequencies, respectively.

● optionally, for each SL carrier (noted as SL carrier) needed to perform the SL operation

) The SL operation may include one or more of the following:

receive SL control information (e.g., over a PSCCH channel, or a PSFCH channel) and/or data information (e.g., over a PSCCH channel).

Transmit SL control information (e.g., over a PSCCH channel, or a PSFCH channel) and/or data information (e.g., over a PSCCH channel).

Determining DL synchronization information of the reference cell and/or information related to cell measurements.

Determining whether the reference cell satisfies one or more cell selection/reselection criteria, via downlink synchronization and/or measurements, and/or other operations.

Determine the state of the SL link, e.g., determine whether the SL link is in an in-coverage (in-coverage) state or an out-of-coverage (out-of-coverage) state. Specifically, for example, if the reference cell satisfies one or more cell selection/reselection criteria, the SL link is determined to be in a covered state, otherwise, the SL link is determined to be in a non-covered state; for another example, if the reference cell satisfies one or more cell selection/reselection criteria and one or more of the cells are detected to indicate that the SL supports 5G physical signals, determining that the SL link is in a covered state, otherwise determining that the SL link is in a non-covered state; for another example, if the reference cell satisfies one or more cell selection/reselection criteria and one or more SIBs related to SL operation in the cell can be acquired, determining that the SL link is in a covered state, otherwise determining that the SL link is in a non-covered state; for another example, if the reference cell satisfies one or more cell selection/reselection criteria and one or more of the cells are detected to indicate support of a 5G SL physical signal and one or more SIBs related to SL operation in the cell may be acquired, the SL link is determined to be in a covered state, otherwise the SL link is determined to be in a non-covered state.

A cell serving as a synchronization reference source is determined. For example, if the reference cell is a PCell of the UE, selecting the PCell as a synchronization reference source; for another example, if the reference cell is an SCell of the UE, the SCell is selected as a synchronization reference source; for another example, if the SL link is in a non-coverage state and the UE is in an RRC _ CONNECTED state, selecting the PCell of the UE as a synchronization reference source; for another example, if the SL link is in the no coverage state and the UE is in the RRC _ IDLE state, a serving cell (serving cell) of the UE is selected as the synchronization reference source.

A cell for SL communication (e.g., SL transmission and/or SL reception) is determined. For example, if the reference cell is a PCell of the UE, selecting the PCell as a cell for SL communication; for another example, if the reference cell is an SCell of the UE, the SCell is selected as a cell for SL communication; for another example, if the SL link is in the no coverage state and the UE is in the RRC _ CONNECTED state, the PCell of the UE is selected as the cell for SL communication; for another example, if the SL link is in the no coverage state and the UE is in the RRC _ IDLE state, the serving cell of the UE is selected as the cell for SL communication.

Alternatively, in the first embodiment of the present invention, SL may be replaced with V2X SL, or SL V2X.

Optionally, in the first embodiment of the present invention, the RB may be a PRB (where applicable).

Alternatively, in the first embodiment of the present invention, the RB may be a CRB (where applicable).

Optionally, in embodiment one of the present invention, the RB may be a VRB (where applicable).

Alternatively, in the first embodiment of the present invention, for any two frequency locations X and Y, the offset between X and Y may sometimes be referred to as Y to X distance, or X to Y distance, or Y and X offset.

Alternatively, in the first embodiment of the present invention, the "point a for SL" and the "point a for reference DL" may correspond to the same absolute frequency position (referred to as "point a" for short).

Optionally, in the first embodiment of the present invention, if the "configuration information related to SL operation" is included in the MIB or the SIB, the parameters (for example, the frequency location, also as the carrier bandwidth, also as the SCS) of one or more SL carriers corresponding to the "configuration information related to SL operation" cannot be determined according to the configuration information of the UL carrier or the SUL carrier of the cell broadcasting the MIB or the SIB. Alternatively, the "configuration information related to the SL operation" at this time may be referred to as "inter-frequency (inter-frequency) SL configuration information" or "neighbor-frequency (neighbor-frequency) SL configuration information".

Alternatively, in embodiment one of the present invention, for FR1(frequency range 1), SCS of one SCS-specific carrier (e.g., SCS-specific SL carrier, also as SCS-specific UL carrier, also as SCS-specific SUL carrier, also as SCS-specific DL carrier) may be 15kHz, or 30kHz, or 60 kHz.

Alternatively, in the first embodiment of the present invention, for FR2(frequency range 2), SCS of one SCS-specific carrier (e.g., SCS-specific SL carrier, as well as SCS-specific UL carrier, as well as SCS-specific SUL carrier, as well as SCS-specific DL carrier) may be 60kHz, or 120 kHz.

Optionally, in the first embodiment of the present invention, if a TDD cell configures a SUL carrier, the UL/DL carrier of the cell may also be referred to as a non-SUL carrier.

Thus, in the first embodiment of the present invention, by indicating the downlink synchronization information in the SL carrier configuration, the UE may determine, through downlink synchronization and/or measurement, the state of the target cell corresponding to the downlink synchronization information, so as to perform other necessary SL operations related to the target cell, for example, determine the coverage state of the SL link, for example, determine whether the target cell may serve as a synchronization reference source, for example, determine whether the target cell may be used for SL communication, and the like.

[ example two ]

The method performed by the user equipment according to the second embodiment of the present invention is described below with reference to fig. 4.

Fig. 4 is a flow chart illustrating a method performed by a user equipment according to a second embodiment of the present invention.

As shown in fig. 4, in the second embodiment of the present invention, the steps performed by the user equipment UE include: step S201 and step S203.

Specifically, in step S201, configuration information related to SL operation in a cell is acquired. Wherein the content of the first and second substances,

● optionally, some or all of the "configuration information related to SL operation" may be contained in the MIB of the cell.

● alternatively, some or all of the "configuration information related to SL operation" may be contained in one SIB of the cell or in a plurality of different SIBs of the cell, respectively.

● alternatively, the configuration information related to SL operation may include the configuration information of one SL carrier, or may include the configuration information of two SL carriers. Wherein the content of the first and second substances,

optionally, each of the one or two SL carriers (denoted C)_SL) May comprise one or more of the following:

information of the carrier with which the SL carrier is associated. Wherein the content of the first and second substances,

optionally, the "carrier with which the SL carrier is associated" may be the UL carrier of the cell, and may also be the SUL carrier of the cell (where applicable).

Optionally, the SL carrier C may only be if the cell is configured with SUL carriers_SLContains the "information of the carrier associated with the SL carrier".

Optionally, if the "information of carrier associated with SL carrier" does not exist, the "carrier associated with SL carrier" is the UL carrier of the cell.

Optionally, the "information of the carrier with which the SL carrier is associated" may include one or more of:

UL/SUL indication. For example, the "UL/SUL indication" may be used to indicate whether the "carrier associated with SL carrier" is one UL carrier or one SUL carrier. Wherein the content of the first and second substances,

optionally, the "information of the carrier associated with the SL carrier" may include the "UL/SUL indication" only when the cell configures the SUL carrier.

SCS specific carrier (denoted as C)_XL) Is used to determine the index of (1). For example, if the "carrier associated with SL carrier" is an UL carrier, the "index of SCS-specific carrier" is the index of the SCS-specific UL carrier list of the cell (e.g., the carrier list configured by SCS-specific carrierlist in frequency-specific infoul in uplinkConfigCommon in servingCellConfigCommon in SIB1 of the cell), e.g., an index value of 0 indicates that C is a carrier associated with a particular carrier (e.g., a carrier list configured by SCS-specific carrierlist in frequency-specific infoul in uplingconfigcommon in SIB1 of the cell)_XLIs the first carrier in the SCS-specific UL carrier list. For another example, if the "carrier associated with SL carrier" is an SUL carrier, the "index of SCS-specific carrier" is an index of the list of SCS-specific SUL carriers of the cell (e.g., the list of carriers configured by SCS-specific carrierlist in frequency-specific infoul in supplementarionuplink in serveclingcellconfigcommon in SIB1 of the cell), e.g., an index value of 0 indicates that C is a carrier associated with SL carrier_XLIs the first carrier in the SCS-specific SUL carrier list.

SCS of carriers with which SL carriers are associated.

SCS of SL carrier. Wherein the content of the first and second substances,

optionally, the "SCS of SL carrier" may not be explicitly indicated, but by the SL carrier C_SLSCS determination of the above configured one SL BWP.

Carrier bandwidth of SL carrier.

Frequency position of SL carrier.

Other configuration information for SL carriers, such as synchronization configuration information, such as SLBWP configuration information, such as configuration information for one or more receive and/or transmit resource pools on each SL BWP, and so forth.

Further, in step S203, one or more parameters of one or two SL carriers corresponding to the "configuration information related to SL operation" are determined.

For example, for each of the SL carriers C_SLExecute byOne or more of the following:

● determining the SL carrier C_SLWhether the associated carrier is an UL carrier or an SUL carrier.

For example, the SL carrier C is determined according to the "UL/SUL indication_SLWhether the associated carrier is an UL carrier or an SUL carrier.

For another example, if the cell configures the SUL carrier, the SL carrier C is determined according to the "UL/SUL indication_SLWhether the associated carrier is an UL carrier or an SUL carrier.

For another example, if the cell does not configure the SUL carrier, the SL carrier C_SLThe associated carrier is one UL carrier.

For another example, if the "information on the carrier associated with the SL carrier" does not include the "UL/SUL indication", the SL carrier C is determined to be the carrier associated with the SL carrier_SLThe associated carrier is one UL carrier.

● determining the SL carrier C_SLAssociated SCS-specific carrier C_XL。

For example, if the SL carrier C_SLThe associated carrier is an UL carrier, then the C_XLIs one of the SCS-specific UL carrier list of the cell (e.g., the carrier list configured by SCS-specific carrierlist in frequenceinnful in uplincnfomum in servingCellConfigCommon in SIB1 of the cell) to which the "index of SCS-specific carrier" corresponds. For example, if the index takes a value of 0, then C is_XLIs the first carrier in the SCS-specific UL carrier list.

For another example, if the SL carrier C_SLThe associated carrier is an UL carrier, then the C_XLIs the carrier in the SCS-specific UL carrier list of the cell (e.g., the carrier list configured by the SCS-specific carrier list in the frequenclnfo UL in the uplincnfigcommon in the servingCellConfigCommon in SIB1 of the cell) is equal to the SCS of the "SL carrier" (e.g., configured by the parameter subarrierspacing). For example, if the "SCS of SL carrier" is 15kHz, the C_XLIs the SCSSCS is 15kHz carrier in the specific UL carrier list.

For another example, if the SL carrier C_SLThe associated carrier is an UL carrier, then the C_XLIs the carrier of which SCS in the SCS-specific UL carrier list of the cell (e.g. the carrier list configured by SCS-specific carrier list in frequency-specific infoul in uplinkConfigCommon in servingCellConfigCommon in SIB1 of the cell) is equal to the SCS of the "carrier with which the SL carrier is associated" (e.g. configured by parameter subarrierspaccing). For example, if the "SCS of the carrier associated with SL carrier" is 15kHz, then the C_XLIs the carrier with SCS 15kHz in the SCS-specific UL carrier list.

For another example, if the SL carrier C_SLThe associated carrier is an SUL carrier, then C is said_XLIs one carrier in the SCS-specific SUL carrier list (e.g., a carrier list configured by SCS-specific carrierlist in frequency info ul in supplementaryunlink in servingCellConfigCommon in SIB1) of the cell to which the "index of SCS-specific carrier" corresponds. For example, if the index takes a value of 0, then C is_XLIs the first carrier in the SCS-specific SUL carrier list.

As another example, if said C_XLIs an SUL carrier, then the C_XLIs the carrier of SCS (e.g., configured by parameter subarrierspacting) in the SCS-specific SUL carrier list of the cell (e.g., configured by SCS-specific carrier list in frequenconidul in supplementaryuckin SIB1 of the cell) is equal to the "SCS of SL carrier". For example, if the "SCS of SL carrier" is 15kHz, the C_XLIs the carrier with SCS 15kHz in the SCS-specific SUL carrier list.

For another example, if the SL carrier C_SLThe associated carrier is an SUL carrier, then C is said_XLIs the SCS-specific SUL carrier list of the cell (e.g., the carrier configured by the SCS-specific CarrierList in the frequencelInfoUL in the supplementaryUplink in the servingCellConfigCommon in SIB1 of the cellWave list) is equal to the SCS of the "SCS of the carrier with which the SL carrier is associated" (e.g., configured by the parameter subanticrierspating). For example, if the "SCS of the carrier associated with SL carrier" is 15kHz, then the C_XLIs the carrier with SCS 15kHz in the SCS-specific SUL carrier list.

● determining the SL carrier C_SLOne or more parameters of (a).

For example, the SL carrier C_SLIs equal to said C_XLThe frequency location of (2).

As another example, the SL carrier C_SLIs equal to the frequency position of said "SL carrier".

As another example, the SL carrier C_SLSCS of equal to C_XLSCS of (1).

As another example, said C_SLSCS of is equal to the "SCS of SL carrier".

As another example, said C_SLIs equal to said C_XLThe carrier bandwidth of (a).

As another example, said C_SLIs equal to the "carrier bandwidth of the SL carrier".

Alternatively, in the second embodiment of the present invention, SL may be replaced with V2X SL, or SL V2X.

Optionally, in the second embodiment of the present invention, the cell may be a serving cell (serving cell) of the UE, or may not be the serving cell of the UE.

Optionally, in the second embodiment of the present invention, the MIB or the SIB may additionally include configuration information of one or more other SL carriers. Optionally, the parameter (e.g. frequency location, also as carrier bandwidth, also as SCS) of the "one or more other SL carriers" cannot be determined according to the configuration information of the UL carrier or SUL carrier of the cell. Alternatively, the "configuration information of one or more other SL carriers" may be referred to as "inter-frequency (inter-frequency) SL configuration information" or "adjacent-frequency (adjacent-frequency) SL configuration information".

Alternatively, in embodiment two of the present invention, for FRi (frequency range 1), SCS of one SCS-specific carrier (e.g., SCS-specific SL carrier, also as SCS-specific UL carrier, also as SCS-specific SUL carrier, also as SCS-specific DL carrier) may be 15kHz, or 30kHz, or 60 kHz.

Alternatively, in embodiment two of the present invention, for FR2(frequency range 2), SCS of one SCS-specific carrier (e.g., SCS-specific SL carrier, also as SCS-specific UL carrier, also as SCS-specific SUL carrier, also as SCS-specific DL carrier) may be 60kHz, or 120 kHz.

In this way, the embodiment of the present invention indicates in the system information whether each configured SL carrier is associated with the UL carrier or the SUL carrier of the corresponding cell, so that the SL carrier may share some or all of the parameters with the UL carrier or the SUL carrier, thereby making it possible to perform the SL operation and the conventional Uu port operation at the same time.

[ third example ]

The method performed by the user equipment according to the third embodiment of the present invention is described below with reference to fig. 5.

Fig. 5 is a flowchart illustrating a method performed by a user equipment according to a third embodiment of the present invention.

As shown in fig. 5, in a third embodiment of the present invention, the steps performed by the user equipment UE include: step S301 and step S303.

Specifically, in step S301, configuration information related to SL operation in a cell is acquired. Wherein the content of the first and second substances,

● optionally, the "configuration information relating to SL operation" may contain one or more of the following (where applicable):

SL carriers associated with UL carriers (denoted as

) The configuration information of (1). Wherein the content of the first and second substances,

optionally, the UL carrier may be one SCS-specific UL carrier of the cell (denoted C)_UL)。

Optionally, the "configuration information of SL carrier associated with UL carrier"

One or more of the following may be included:

the index of the SCS-specific UL carrier. For example, the "index of SCS-specific UL carrier" is an index of the SCS-specific UL carrier list of the cell (e.g., a carrier list configured by SCS-specific carrierlist in frequenceinnful in uplinkConfigCommon in servingCellConfigCommon in SIB1 of the cell), e.g., an index value of 0 means that C is a carrier list of SCS-specific carrierlist_ULCorresponding to the first carrier in the SCS-specific UL carrier list.

SCS of SCS-specific UL carriers.

SCS of SL carrier. Wherein the content of the first and second substances,

alternatively, the "SCS of SL carrier" may not be explicitly indicated, but rather by the SL carrier

SCS determination of the above configured one SL BWP.

A carrier bandwidth of the SL carrier.

The frequency location of the SL carrier.

And/or other configuration information of the SL carrier, such as synchronization configuration information, as well as SL BWP configuration information, as well as configuration information of one or more receive and/or transmit resource pools on each SL BWP, and so on.

SL carriers associated with SUL carriers (denoted as SL carriers)

) Of (2) configuration information. Wherein the content of the first and second substances,

optionally, the SUL carrier may be one SCS-specific SUL carrier (denoted C) of the cell_SUL)。

Optionally, the "configuration information related to SL operation" contains "configuration information of SL carriers associated with SUL carriers" only when the cell has configured the SUL carriers.

Optionally, the "configuration information of SL carrier associated with SUL carrier"

One or more of the following may be included:

the index of the SCS-specific SUL carrier. For example, the "index of the SCS-specific SUL carrier" is an index of an SCS-specific SUL carrier list of the cell (e.g., a carrier list configured by SCS-specific carrierlist in frequency-specific infoul in supplementaryinforlink in servingCellConfigCommon in SIB1 of the cell), for example, an index value of 0 means that C is a carrier list of the SCS-specific sull carrier list of the cell_SULCorresponding to the first carrier in the SCS-specific SUL carrier list.

SCS of SCS-specific SUL carriers.

SCS of SL carrier. Wherein the content of the first and second substances,

SCS determination of the above configured one SL BWP.

A carrier bandwidth of the SL carrier.

The frequency location of the SL carrier.

Further, in step S303, one or more parameters of one or both SL carriers of the cell are determined.

For example, one or more of the following are performed:

● determining the C_UL。

For example, the C_ULIs one carrier in the SCS-specific UL carrier list of the cell (e.g., the carrier list configured by SCS-specific carrierlist in frequenceinnful in uplinkConfigCommon in servingCellConfigCommon in SIB1 of the cell) to which the "index of SCS-specific UL carrier" corresponds. For example, if the index takes a value of 0, then C is_ULIs the first carrier in the SCS-specific UL carrier list.

As another example, said C_ULIs the carrier in the SCS-specific UL carrier list of the cell (e.g., the carrier list configured by the SCS-specific carrier list in the frequenclnfo UL in the uplincnfigcommon in the servingCellConfigCommon in SIB1 of the cell) is equal to the SCS of the "SL carrier" (e.g., configured by the parameter subarrierspacing). For example, if the "SCS of SL carrier" is 15kHz, the C_ULIs the carrier with SCS 15kHz in the SCS-specific UL carrier list.

As another example, said C_ULIs the carrier in the SCS-specific UL carrier list (e.g., the carrier list configured by the SCS-specific carrier list in the frequenconingoul in the uplincnfigcommon in the servingCellConfigCommon in SIB1) of the cell is equal to the SCS of the "UL carrier" (e.g., configured by the parameter subarrierspacing). For example, if the "SCS of UL carrier" is 15kHz, then the C_ULIs the carrier with SCS 15kHz in the SCS-specific UL carrier list.

● determining the

One or more parameters of (a).

For example, the

Is equal to said C_ULThe frequency location of (2).

For example, the

Is equal to the frequency position of said "SL carrier".

In another example, the

SCS of equal to C_ULSCS of (1).

In another example, the

SCS of is equal to the "SCS of SL carrier".

In another example, the

Is equal to said C_ULThe carrier bandwidth of (a).

In another example, the

Is equal to the "carrier bandwidth of the SL carrier".

● determining the C_SUL(where applicable, e.g., where the cell is configured with a SUL carrier).

For example, the C_SULIs one carrier in the SCS-specific SUL carrier list (e.g., a carrier list configured by SCS-specific carrierlist in frequency infoul in supplementaryunk in servingCellConfigCommon in SIB1) of the cell to which the "index of SCS-specific UL carrier" corresponds. For example, if the index takes a value of 0, then C is_SULIs the first carrier in the SCS-specific SUL carrier list.

As another example, said C_SULIs the SCS (e.g., configured by the SCS-specific Carrier List in the frequency InfoUL in the supplementaryUplink in the servingCellConfigCommon in the SIB1) in the SCS-specific SUL carrier list of the cell (e.g., configured by the parameter subcarrierspace configuration) is equal to the "SCS of SL carrier". For example, if the "SCS of SL carrier" is 15kHz, the C_SULIs the carrier with SCS 15kHz in the SCS-specific SUL carrier list.

As another example, said C_SULIs the carrier of the SCS (e.g., configured by the parameter subarrierspacting) in the SCS-specific SUL carrier list of the cell (e.g., the carrier list configured by the SCS-specific carrier list in the frequencyinfaul in the supplementaryUplink in the servingCellConfigCommon in the SIB1) is equal to the SCS of the "SUL carrier". For example, if the "SCS of SUL carrier" is 15kHz, then the C_SULIs the carrier with SCS 15kHz in the SCS-specific SUL carrier list.

● determining the

If applicable, e.g., if the cell is configured with a SUL carrier.

For example, the

Is equal to said C_SULThe frequency location of (2).

For example, the

Is equal to the frequency position of said "SL carrier".

In another example, the

SCS of equal to C_SULSCS of (1).

In another example, the

SCS of is equal to the "SCS of SL carrier".

In another example, the

Is equal to said C_SULThe carrier bandwidth of (a).

In another example, the

Is equal to the "carrier bandwidth of the SL carrier".

Alternatively, in the third embodiment of the present invention, SL may be replaced with V2X SL, or SL V2X.

Optionally, in the third embodiment of the present invention, the cell may be a serving cell (serving cell) of the UE, or may not be the serving cell of the UE.

Optionally, in a third embodiment of the present invention, the MIB or the SIB may additionally include configuration information of one or more other SL carriers. Optionally, the parameter (e.g. frequency location, also as carrier bandwidth, also as SCS) of the "one or more other SL carriers" cannot be determined according to the configuration information of the UL carrier or SUL carrier of the cell. Alternatively, the "configuration information of one or more other SL carriers" may be referred to as "inter-frequency (inter-frequency) SL configuration information" or "adjacent-frequency (adjacent-frequency) SL configuration information".

Alternatively, in the third embodiment of the present invention, for FR1(frequency range 1), SCS of one SCS-specific carrier (e.g., SCS-specific SL carrier, also as SCS-specific UL carrier, also as SCS-specific SUL carrier, also as SCS-specific DL carrier) may be 15kHz, or 30kHz, or 60 kHz.

Alternatively, in the third embodiment of the present invention, for FR2(frequency range 2), SCS of one SCS-specific carrier (e.g., SCS-specific SL carrier, as well as SCS-specific UL carrier, as well as SCS-specific SUL carrier, as well as SCS-specific DL carrier) may be 60kHz, or 120 kHz.

Thus, the embodiment of the present invention enables the SL carrier to share part or all of the parameters with the UL carrier or the SUL carrier by indicating the SL carrier respectively associated with the UL carrier and/or the SUL carrier of the corresponding cell in the system information, thereby making it possible to perform the SL operation and the conventional Uu port operation at the same time.

[ example four ]

A method performed by the user equipment according to a fourth embodiment of the present invention is described below with reference to fig. 6.

Fig. 6 is a flowchart illustrating a method performed by a user equipment according to a fourth embodiment of the present invention.

As shown in fig. 6, in the fourth embodiment of the present invention, the steps performed by the user equipment UE include: step S401 and step S403.

Specifically, in step S401, the content of the SL MIB is set. Wherein the content of the first and second substances,

● optionally, the "content of the SL MIB" corresponds to a SL carrier. Wherein the content of the first and second substances,

optionally, the SL carrier is associated with an UL carrier or an SUL carrier of a cell (e.g., associated by the method described in embodiment two of the present invention, as well as associated by the method described in embodiment three of the present invention, and as well as associated by other methods).

● optionally, the "contents of the SL MIB" contain TDD-related configuration information.

Wherein the content of the first and second substances,

optionally, the "TDD-related configuration information" may indicate time-domain configuration information of the SL carrier. For example, according to the "TDD-related configuration information", the properties of all symbols in any given symbol or symbol set (e.g., all symbols in a slot, such as all symbols in a subframe, such as all symbols in a frame, such as a custom symbol set) on the SL carrier may be determined. For example, all symbols in the symbol or symbol set are Uplink (UL) symbols, or Downlink (DL) symbols, or Straight Line (SL) symbols, or flexible symbols.

Alternatively, the "TDD-related configuration information" may also be configuration information related to a slot format (or a subframe format, or a frame format).

Optionally, one special value of the "TDD-related configuration information" (denoted as nentdd. e.g., a value corresponding to 0 for all bits) indicates one or more of the following (in an and or any combination, where applicable):

the SL carrier is a carrier on an FDD band.

The SL carrier is the carrier in an FDD cell.

The SL carrier is one UL carrier.

The SL carrier is a SUL carrier.

The SL carrier is a carrier dedicated for SL (e.g., V2X SL) operation.

The SL carrier is a carrier on a band dedicated to SL (e.g., V2X SL).

No DL symbol on the SL carrier.

All symbols on the SL carrier are SL symbols.

The symbols on the SL carrier include SL symbols and UL symbols.

The symbols on the SL carrier include SL symbols and flexible symbols.

The symbols on the SL carrier include SL symbols, UL symbols, and flexible symbols.

Optionally, setting the value of the "TDD-related configuration information" to nentdd if one or more of the following holds:

the state of the SL link corresponding to the SL carrier is "covered". Optionally, the state of the SL link may be determined according to the method described in the first embodiment of the present invention, or may be determined according to another method.

The tdd-UL-DL-configuration common parameter is not included in the system information (e.g. SIB1) of the cell.

The tdd-UL-DL-configuration common parameter is not included in the system information (e.g., SIB1) of the PCell of the UE.

The SL carrier is associated with one SUL carrier of the cell. For example, one or more parameters (e.g., frequency location, also as SCS, also as carrier bandwidth) of the SL carrier are the same as one SUL carrier of the cell.

● optionally, the "content of the SL MIB" further includes other configuration information, such as SL link status, bandwidth of the SL carrier, configuration information of SLBWP on the SL carrier, reserved bits, and so on.

Further, in step S403, the SL MIB is transmitted on the SL carrier.

Alternatively, in the fourth embodiment of the present invention, SL may be replaced with V2X SL, or SL V2X.

Optionally, in the fourth embodiment of the present invention, the cell may be a serving cell (serving cell) of the UE, or may not be the serving cell of the UE.

Thus, in the embodiment of the present invention, the content of the SL MIB is set according to the association between the SL carrier and the UL or SUL carrier in the corresponding cell, so that the TDD uplink/downlink configuration information of the cell is written into the SL MIB only when necessary, thereby ensuring that the UE receiving the SL MIB cannot mistakenly interpret the content of the SL MIB.

[ example five ]

The method performed by the user equipment according to the fifth embodiment of the present invention is described below with reference to fig. 7.

Fig. 7 is a flowchart illustrating a method performed by a user equipment according to an embodiment of the present invention.

As shown in fig. 7, in a fifth embodiment of the present invention, the steps performed by the user equipment UE include: step S501 and step S503.

Specifically, in step S501, time domain information of the SL SSB is acquired. Wherein the content of the first and second substances,

● optionally, part or all of the "time domain information of the SL SSB" may be contained in the payload of the PSBCH contained in the SL SSB, or contained in the SL MIB carried by the PSBCH, or indicated by the transmission parameters (e.g., DMRS sequence) of the PSBCH.

●, optionally, the "time domain information of the SL SSB" contains one or more of the following:

SL SSB Number (denoted as Direct Frame Number) within DFN periodn_SLSSB). Wherein optionally, the number "n" of the "SL SSB in the DFN period_SLSSBIs equal to zero; optionally, the "SL SSB is numbered" n "within the DFN period_SLSSBIs equal to the total number of SL SSBs within the DFN period minus one.

For example, the "SL SSB number" n within the DFN period_SLSSBThe set {0, 1.,. N } may be taken_SLSSB-1 }. As another example, the "number" n "of the SL SSB within the DFN period_SLSSBCan get a set

One value of (1). As another example, the "number" n "of the SL SSB within the DFN period_SLSSBCan get a set

One value of (1).

SL SSB period numbering within DFN period (denoted as n)_SLSSB，DFN). Wherein, optionally, the number "n" of the "SL SSB period within the DFN period_SLSSB，DFNIs equal to zero; optionally, the "SL SSB period is numbered" n "within the DFN period_SLSSB，DFNIs equal to the total number of SL SSB periods within the DFN period minus one.

For example, the "SL SSB period is numbered" n "within the DFN period_SLSSB，DFNCan get a set

One value of (1). As another example, the "SL SSB period is numbered" n "within the DFN period_SLSSB，DFNCan get a set

One value of (1).

SL SSB numbering within the SL SSB period (denoted as n)_SLSSB，i). Wherein, optionally, the number "n" of the "SL SSB in the SL SSB period_SLSSB，iIs equal to zero; optionally, the "number of SL SSB in SL SSB period" n_SLSSB，iIs equal to the total number of SL SSBs (denoted as N) in the SL SSB period_SLSSB，i) Minus one, wherein optionally the "total number of SL SSBs" N within the SL SSB period_SLSSB，iMay take a predefined value (e.g., 1, or 2, or 3, or 4, or 5, or 6, or 7, or 8, or

Or

Or

It may also take a pre-configured value or a value configured by RRC messages or PC5RRC messages.

Wherein N is_SLSSBIs the total number of SL SSBs in the DFN period, T_DFNIs the DFN period, T_SLSSBIs the SL SSB period. Optionally, the "DFN period" T_DFNThe "SL SSB period" T_SLSSBAnd said "total number of SL SSBs within a DFN period" N_SLSSBAny one of them may take a predefined value, may take a pre-configured value, or may take a value configured by an RRC message or a PC5RRC message. For example, the "DFN period" T_DFNEqual to 10240 milliseconds (or 1024 frames). As another example, the "SL SSB period" T_SLSSBEqual to 160 milliseconds (or 16 frames). As another example, the "total number of SLSSBs within a DFN period" N_SLSSBEqual to 64.

Further, in step S503, the time domain location of the SL SSB is determined.

For example, the number of DFNs in which the SL SSB is located is equal to (n)_SLSSB+C₁)·T_SLSSB+C₂. Wherein, C₁And C₂Any one of them may take a predefined value, may take a pre-configured value, or may take a value configured by an RRC message or a PC5RRC message. E.g. C₁0. As another example, C₂＝0。

As another example, the number of DFN where the SL SSB is located is equal to (n)_SLSSB，DFN+C₃)·T_SLSSB+F(n_SLSSB，i)+C₄. Wherein the content of the first and second substances,

●C₃and C₄Any one of them may take a predefined value, may take a pre-configured value, or may take a value configured by an RRC message or a PC5RRC message. E.g. C₃0. As another example, C₄＝0。

● F (-) can be a pre-configured mapping relation, or a mapping relation configured by RRC message or PC5RRC message; for example, the "SL SSB period" T_SLSSBEqual to 160 milliseconds (or 16 frames), the "number n of the SL SSB in a SL SSB period_SLSSB，iIs {0, 1, 2, 3}, and the total number of SL SSBs in the "SL SSB period" N_SLSSB，iEqual to 4, said F (·) is configured as F (0) · 28, F (1) · 56, F (2) · 84, F (3) · 112.

Optionally, the "SL SSB period is numbered" n "within the DFN period_SLSSB，DFNAnd the number "n" of the "SL SSB in the SL SSB period_SLSSB，iMay not be included in the "time domain information of the SL SSB", but is numbered "n" within the DFN period by the "SL SSB_SLSSBAnd (4) indicating. E.g. n_SLSSB，DFN＝n_SLSSB/N_SLSSB，i. Also for example, n_SLSSB，i＝n_SLSSB mod N_SLSSB，i。

Optionally, the "SL SSB is numbered" n "within the DFN period_SLSSBMay not be included in the "time domain information of SL SSB", but is numbered "n" within the DFN period by the "SL SSB period_SLSSB，DFNAnd the number "n" of the "SL SSB in the SL SSB period_SLSSB，iAnd (4) indicating. E.g. n_SLSSB＝n_SLSSB，DFN·N_SLSSB，i+n_SLSSB，i。

Optionally, in the fifth embodiment of the present invention, the DFN may be replaced by an SFN.

Alternatively, in the fifth embodiment of the present invention, the direct frame may be replaced with a system frame.

Optionally, in the fifth embodiment of the present invention, the SL SSB may also be referred to as a candidate (candidate) SL SSB, or a SL SSB candidate. Optionally, there may be SL SSB transmission or may not exist on the time domain and/or frequency domain resource corresponding to one candidate SL SSB. Optionally, in the fifth embodiment of the present invention, there may be one or more SL SSBs transmitted by the UE on the time domain and/or frequency domain resources corresponding to one candidate SL SSB.

In this way, the embodiment of the present invention, by using the rule that the SSB occurs in the DFN period, indicates the information of the corresponding SSB in the DFN period in the transmission parameters of the SL MIB and/or PSBCH payload and/or PSBCH, so that the UE can derive the DFN from the information of the SSB in the DFN period without directly indicating the complete DFN information (for example, taking values from 0 to 1023, requiring 10 bits) in the SL MIB, thereby improving the efficiency of time domain information indication.

[ modified examples ]

Next, as a modification, a user equipment that can execute the method performed by the user equipment described in detail above of the present invention will be described with reference to fig. 8.

Fig. 8 is a block diagram showing a user equipment UE according to the present invention.

As shown in fig. 8, the user equipment UE60 includes a processor 601 and a memory 602. The processor 601 may include, for example, a microprocessor, a microcontroller, an embedded processor, or the like. The memory 602 may include, for example, volatile memory (e.g., random access memory RAM), a Hard Disk Drive (HDD), non-volatile memory (e.g., flash memory), or other memory, among others. The memory 602 has stored thereon program instructions. Which when executed by the processor 601 may perform the above-described method performed by the user equipment as described in detail herein.

The method of the invention and the apparatus involved have been described above in connection with preferred embodiments. It will be appreciated by those skilled in the art that the above illustrated approaches are exemplary only, and that the various embodiments described above can be combined with each other without conflict. The method of the present invention is not limited to the steps or sequence shown above. The network nodes and user equipment shown above may comprise further modules, e.g. modules that may be developed or developed in the future, which may be available to a base station, MME, or UE, etc. The various identifiers shown above are exemplary only and not limiting, and the invention is not limited to the specific information elements that are examples of these identifiers. Many variations and modifications may occur to those skilled in the art in light of the teachings of the illustrated embodiments.

It should be understood that the above-described embodiments of the present invention can be implemented by software, hardware, or a combination of both software and hardware. For example, various components within the base station and the user equipment in the above embodiments may be implemented by various means, including but not limited to: analog circuit devices, Digital Signal Processing (DSP) circuits, programmable processors, Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs), programmable logic devices (CPLDs), and the like.

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

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

Further, each functional block or respective feature of the base station device and the terminal device used in each of the above embodiments may be implemented or executed by a circuit, which is typically one or more integrated circuits. Circuitry designed to perform the various functions described in this specification may include a general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC) or a general purpose integrated circuit, a Field Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic, or discrete hardware components, or any combination thereof. A general-purpose processor may be a microprocessor, or the processor may be an existing processor, controller, microcontroller, or state machine. The general-purpose processor or each circuit described above may be configured by a digital circuit, or may be configured by a logic circuit. Further, when advanced technology capable of replacing the current integrated circuit is developed due to the advancement of semiconductor technology, the present invention can also use the integrated circuit obtained by the advanced technology.

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

Claims

1. A method performed by a user device, comprising:

2. The user equipment-performed method of claim 1,

the configuration information related to the direct operation includes configuration information of a direct carrier and configuration information of a reference downlink.

3. The user equipment-performed method of claim 1,

the straight-ahead operation comprises at least one of:

determining a cell used as a synchronization reference source;

a cell for direct communication is determined.

4. A method performed by a user equipment, comprising:

5. The method performed by the user equipment of claim 4,

the configuration information related to the direct operation includes configuration information of one direct carrier or configuration information of two direct carriers.

6. The method performed by the user equipment of claim 5,

for each of said direct carriers, i.e. C_SLPerforming at least one of the following operations:

determining the C_SLAssociated subcarrier spacing specific carrier C_XL；

Determining the C_SLOne or more parameters of (a).

7. The method performed by the user equipment of claim 4,

the configuration information related to the inline operation includes at least one of:

the direct carriers associated with the uplink carriers are

Configuration information of (2);

complementing the direct carriers with which the uplink carriers are associated

The configuration information of (1).

8. The user equipment-performed method of claim 7,

performing at least one of the following operations:

determining the

One or more parameters of (a);

determining the

One or more parameters of (a).

9. The user equipment-implemented method according to any one of claims 1-8,

part or all of the configuration information related to the direct operation is contained in a master information block of the direct cell or contained in one or more system information blocks of the direct cell.

10. A user device, comprising:

a processor; and

a memory storing instructions, wherein the instructions, when executed by the processor, perform the method of any of claims 1-9.