Method performed by a user equipment and user equipment

Abstract

The present invention provides a method performed by a user equipment, which includes: step A of obtaining time domain configuration information and / or time domain indication information; and step B of determining timing-related information according to the time domain configuration information and / or the time domain indication information, and / or other information.

Description

Technical Field

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

[0002] V2X (Vehicle-to-everything) communication refers to the communication between a vehicle and any entity that may affect the vehicle. Typical V2X communications include V2I (Vehicle-to-Infrastructure), V2N (Vehicle-to-network), V2V (Vehicle-to-vehicle), V2P (Vehicle-to-Pedestrian), etc.

[0003] In the LTE standard of 3GPP, V2V communication has been supported since Rel-14 (3GPP V2X phase 1), and V2X communication has been supported since Rel-15 (3GPP V2X phase 2). In the 3GPP standard specifications, both V2V and V2X are based on D2D (Device to Device) technology. The corresponding interface between UEs is called PC5, and is also called "direct" or "sidelink" (SL) link at the physical layer to distinguish it from the uplink (UL) link and the downlink (DL) link.

[0004] With the progress of the standardization work of 5G NR (see Non-Patent Document 1, hereinafter referred to as 5G, or NR, or NR Rel-15, or 5G Rel-15), and 3GPP identifying more advanced V2X service (eV2X service) requirements, 3GPP V2X phase 3, that is, 5G V2X, has been put on the agenda. In June 2018, at the 80th plenary session of 3GPP RAN, a new research project on 3GPP 5G V2X (see Non-Patent Document 2, hereinafter referred to as the 5G V2X research project, or the V2X Phase 3 research project) was approved. In March 2019, at the 83rd plenary session of 3GPP RAN, a new work project on 3GPP 5G V2X (see Non-Patent Document 3, hereinafter referred to as the 5G V2X work project) was approved. The objectives of the 5G V2X work project include:

[0005] · Design of SL signals, channels, bandwidth parts (BWPs), and resource pools.

[0006] · Design of resource allocation mechanism.

[0007] · Design of SL synchronization mechanism.

[0008] · Coexistence of SL operations between LTE and NR.

[0009] · SL physical layer processes, such as HARQ (hybrid automatic repeat request) process, CSI (channel-state information) acquisition, and power control, etc.

[0010] · Congestion control.

[0011] · Layer 2 / Layer 3 protocols and signaling.

[0012] · Control of LTE SL through the NR Uu interface.

[0013] · gNB scheduling based on UE-reported assistance information.

[0014] · QoS management.

[0015] In 5G V2X, the physical layer of the SL interface supports broadcast, groupcast, and unicast transmissions in in-coverage, out-of-coverage, and partial-coverage scenarios.

[0016] 5G V2X supports the SL synchronization function. The related signals and channels include:

[0017] · SL PSS (Sidelink Primary Synchronization Signal), also known as S-PSS, or PSSS (Primary Sidelink Synchronization Signal).

[0018] · SL SSS (Sidelink Secondary Synchronization Signal), also known as S-SSS, or SSSS (Secondary Sidelink Synchronization Signal).

[0019] ·PSBCH (Physical Sidelink Broadcast Channel).

[0020] In 5G V2X, SL PSS, SL SSS, and PSBCH are organized in a block form on the time-frequency resource grid, which is called SLSSB (Sidelink SS / PBCH block), or S-SSB. The transmission bandwidth of SL SSB is within the SL BWP (Sidelink Bandwidth Part) configured for the UE. SL PSS and / or SL SSS can carry SL SSID (Sidelink Synchronization Identity, or Sidelink Synchronization Identifier), and PSBCH can carry SL MIB (Sidelink Master Information Block, also known as S-MIB, or MIB-SL, or MIB-SL-V2X).

[0021] The synchronization source of 5G V2X (sometimes also called synchronization reference, or synchronization reference source) can include GNSS (Global Navigation Satellite System), gNB, eNB, and NR UE. The priority of the synchronization source is defined as shown in Table 1. Among them, the UE determines whether to use "GNSS-based synchronization" or "gNB / eNB-based synchronization" through (pre)-configured information. Examples of GNSS include GPS (Global Positioning System), GLONASS (Global Navigation Satellite System), BeiDou (Beidou Navigation Satellite System), Galileo (Galileo Navigation Satellite System), QZSS (Quasi-Zenith Satellite System), etc.

[0022] Table 1 5G V2X Synchronization Source Priority

[0023] Priority GNSS-based Synchronization gNB / eNB-based Synchronization P0 GNSS gNB / eNB P1 All UEs directly synchronized to GNSS All UEs directly synchronized to gNB / eNB P2 All UEs indirectly synchronized to GNSS All UEs indirectly synchronized to gNB / eNB P3 Any other UEs GNSS P4 N / A All UEs directly synchronized to GNSS P5 N / A All UEs indirectly synchronized to GNSS P6 N / A Any other UEs

[0024] In a coverage - free scenario and in the RRC_IDLE state, one SL BWP can be (pre -)configured on a 5G V2X carrier. In a coverage scenario, there is only one active SL BWP on a 5G V2X carrier. One or more resource pools (a resource pool refers to a set of time - frequency resources that can be used for SL transmission and / or reception) can be (pre -)configured on one SL BWP.

[0025] The resource allocation methods of 5G V2X can be classified as follows:

[0026] · Mode 1: The base station schedules the SL resources for SL transmission.

[0027] · Mode 2: The UE determines the SL resources for SL transmission (i.e., the base station does not participate in the scheduling of SL resources).

[0028] Other channels involved in 5G V2X at least include:

[0029] · PSSCH (Physical Sidelink Shared Channel).

[0030] · PSCCH (Physical Sidelink Control Channel).

[0031] · PSFCH (Physical Sidelink Feedback Channel).

[0032] In 5G V2X, the transmitter UE can schedule the transmission of the data (in the form of a transport block, TB) carried by the PSSCH through the SCI (Sidelink Control Information) carried by the PSCCH; the receiver UE can indicate whether the transport block has been correctly received through the HARQ feedback information carried in the PSFCH. Depending on factors such as whether the scheduled transmission is unicast, multicast, or broadcast, and whether HARQ feedback is required, the SCI can at least contain one or more of the following:

[0033] · Layer-1 Source ID, or Physical Layer Source ID.

[0034] · Layer-1 Destination ID, or Physical Layer Destination ID.

[0035] · HARQ Process ID, or HARQ Process Number.

[0036] · New Data Indicator (NDI).

[0037] · Redundancy Version (RV).

[0038] In 5G V2X, the multiplexing method of PSCCH and its associated PSSCH includes at least: a part of PSCCH and a part of its associated PSSCH use resources that overlap in the time domain but do not overlap in the frequency domain, while another part of the PSCCH and / or another part of the PSSCH use resources that do not overlap in the time domain.

[0039] In 5G V2X, the problems that the direct link design may face include at least:

[0040] · In the case of using GNSS as a synchronization reference source, how to calculate or derive the complete timing information of the direct link, such as direct frame number (DFN), direct subframe number, and direct slot number, etc.

[0041] Prior art documents

[0042] Non-patent documents

[0043] Non-patent document 1: RP-181474, Revised WID on New Radio Access Technology

[0044] Non-patent document 2: RP-181429, New SID: Study on 5G V2X

[0045] Non-Patent Document 3: RP-190766, New WID on 5G V2X with NR sidelink Summary of the Invention

[0046] To solve at least some of the above problems, the present invention provides a method performed by a user equipment and a user equipment.

[0047] According to the present invention, there is provided a method performed by a user equipment, including: step A of obtaining time domain configuration information and / or time domain indication information; and step B of determining timing-related information according to the time domain configuration information and / or the time domain indication information, and / or other information.

[0048] Wherein, the time domain configuration information and the time domain indication information may include one or more of time zero, reference time, target time, and timing offset.

[0049] Herein, the time zero, the reference time, the target time, and the timing offset may respectively establish a correspondence with a parameter.

[0050] Herein, the parameter may be configured in a semi-static manner or a dynamic manner.

[0051] In addition, the timing-related information may be the timing information of a sidelink (SL link).

[0052] Wherein, the timing information of the sidelink may include one or more of a super direct frame number, a direct frame number, a direct half-frame number, a direct sub-frame number, and a direct time slot number.

[0053] Herein, the direct time slot number may be the number of the direct time slot in the super direct frame, or in the direct frame, or in the direct half-frame, or in the direct sub-frame.

[0054] In addition, the direct time slot number can be calculated by any one of the following formulas (1) to (20):

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[0075]

[0076] Among them, ndirectslot: direct time slot number;

[0077] The length of each direct time slot;

[0078] T target : Target time;

[0079] T ref : Reference time;

[0080] Δ T : Timing offset;

[0081] μ: The subcarrier spacing configuration corresponding to the straight link;

[0082] The number of direct time slots included in each direct frame;

[0083] The number of direct frames included in each super direct frame;

[0084] The number of direct time slots included in each direct subframe;

[0085] The number of direct subframes included in each direct frame;

[0086] The number of direct half - frames included in each direct frame;

[0087] The number of direct time slots included in each direct half - frame;

[0088] The number of direct subframes included in each direct half - frame;

[0089] The number of direct time slots included in each direct subframe;

[0090] The number of super - direct frames included in each super - direct frame numbering period;

[0091] The number of direct frames included in each direct frame numbering period.

[0092] Furthermore, the direct time slot number may be the number of the direct time slot within the super - direct frame numbering period, or the number within the direct frame numbering period.

[0093] In addition, according to the present invention, a user equipment is provided, including: a processor; and a memory storing instructions, wherein the instructions, when run by the processor, execute the above - mentioned method.

[0094] According to the present invention, it is possible to derive timing - related parameters of the SL link, such as super - direct frame number, direct frame number, direct half - frame number, direct sub - frame number, and direct time slot number, etc., by using one or more of the time zero point, reference time, target time, and timing offset, for example, by using the current UTC time, so that all user equipments UE, base stations, and / or other entities operating on the SL link can be synchronized in timing parameters, ensuring the correct transmission and reception of the user equipment UE, base stations, and / or other entities on the SL link. BRIEF DESCRIPTION OF THE DRAWINGS

[0095] Through the following detailed description in conjunction with the drawings, the above - mentioned and other features of the present invention will become more obvious, wherein:

[0096] Figure 1 A flowchart of a method executed by a user equipment according to Embodiment 1 of the present invention is shown.

[0097] Figure 2 A diagram showing an example of the frame structure corresponding to the straight - through link is shown.

[0098] Figure 3 It is a block diagram schematically showing a user equipment related to the present invention. Specific embodiments

[0099] The present invention will be elaborated in detail below in conjunction with 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 simplicity, the detailed description of well-known technologies not directly related to the present invention is omitted to prevent confusion in the understanding of the present invention.

[0100] The following uses a 5G mobile communication system and its subsequent evolved versions as an example application environment to specifically describe multiple embodiments according to the present invention. However, it should be pointed out that the present invention is not limited to the following embodiments, but is applicable to more other wireless communication systems, such as communication systems after 5G and 4G mobile communication systems before 5G, etc.

[0101] Some terms related to the present invention are described below. Unless otherwise specified, the terms related to the present invention are defined herein. The terms given in the present invention may have different naming methods in LTE, LTE-Advanced, LTE-Advanced Pro, NR, and subsequent communication systems, but unified terms are used in the present invention, and when applied to a specific system, they can be replaced with the terms used in the corresponding system.

[0102] 3GPP: 3rd Generation Partnership Project, the Third Generation Partnership Project

[0103] AS: Access Stratum, the access layer

[0104] BWP: Bandwidth Part, bandwidth segment

[0105] CA: Carrier Aggregation, carrier aggregation

[0106] CCE: control-channel element, control channel element

[0107] CORESET: control-resource set, control resource set

[0108] CP: Cyclic Prefix, cyclic prefix

[0109] CP-OFDM: Cyclic Prefix Orthogonal Frequency Division Multiplexing, cyclic prefix orthogonal frequency division multiplexing

[0110] CRB: Common Resource Block, the common resource block

[0111] CRC: Cyclic Redundancy Check, cyclic redundancy check

[0112] CSI: Channel-state Information, channel state information

[0113] CSS: Common Search Space, the common search space

[0114] DC: Dual Connectivity, dual connectivity

[0115] DCI: Downlink Control Information, downlink control information

[0116] DFN: Direct Frame Number, direct frame number

[0117] DFT-s-OFDM: Discrete Fourier Transformation Spread Orthogonal Frequency Division Multiplexing, discrete Fourier transform spread orthogonal frequency division multiplexing

[0118] DL: Downlink, downlink

[0119] DL-SCH: Downlink Shared Channel, downlink shared channel

[0120] DM-RS: Demodulation reference signal, demodulation reference signal

[0121] eMBB: Enhanced Mobile Broadband, enhanced mobile broadband communication

[0122] eNB: E-UTRAN Node B, E-UTRAN Node B

[0123] E-UTRAN: Evolved UMTS Terrestrial Radio Access Network, evolved UMTS terrestrial radio access network

[0124] FDRA: Frequency Domain Resource Assignment, frequency domain resource allocation

[0125] FR1: Frequency Range 1, Frequency Range 1

[0126] FR2: Frequency Range 1, Frequency Range 2

[0127] GLONASS: GLObal NAvigation Satellite System, Global Navigation Satellite System

[0128] gNB: NR Node B, NR Node B

[0129] GNSS: Global Navigation Satellite Svstem, Global Navigation Satellite System

[0130] GPS: Global Positioning System, Global Positioning System

[0131] HARQ: Hybrid Automatic Repeat Request, Hybrid Automatic Repeat Request

[0132] IE: Information Element, Information Element

[0133] IP: Internet Protocol, Internet Protocol

[0134] LCID: Logical Channel ID, Logical Channel ID

[0135] LTE: Long Term Evolution, Long Term Evolution

[0136] LTE-A: Long Term Evolution-Advanced, Long Term Evolution-Advanced

[0137] MAC: Medium Access Control, Medium Access Control

[0138] MAC CE: MAC Control Element, MAC Control Element

[0139] MCG: Master Cell Group, Master Cell Group

[0140] MIB: Master Information Block, Master Information Block

[0141] MIB-SL: Master Information Block-Sidelink, the main information block - straight ahead

[0142] MIB-SL-V2X: Master Information Block-Sidelink-V2X, the main information block - straight ahead - V2X

[0143] MIB-V2X: Master Information Block-V2X, the main information block - V2X

[0144] mMTC: massive Machine Type Communication, large-scale machine-type communication

[0145] NAS: Non-Access-Stratum, non-access stratum

[0146] NDI: New Data Indicator, new data indicator

[0147] NR: New Radio, new radio

[0148] NUL: Normal Uplink, normal uplink

[0149] OFDM: Orthogonal Frequency Division Multiplexing, orthogonal frequency division multiplexing

[0150] PBCH: Physical Broadcast Channel, physical broadcast channel

[0151] PDCCH: Physical Downlink Control Channel, physical downlink control channel

[0152] PDCP: Packet Data Convergence Protocol, packet data convergence protocol

[0153] PDSCH: Physical Downlink Shared Channel, physical downlink shared channel

[0154] PSBCH: Physical Sidelink Broadcast Channel, physical straight-ahead broadcast channel

[0155] PSCCH: Physical Sidelink Control Channel, physical straight-ahead control channel

[0156] PSFCH: Physical Sidelink Feedback Channel, the physical direct feedback channel

[0157] PSSCH: Physical Sidelink Shared Channel, the physical direct shared channel

[0158] PRB: Physical Resource Block, the physical resource block

[0159] PSS: Primary Synchronization Signal, the primary synchronization signal

[0160] PSSS: Primary Sidelink Synchronization Signal, the primary direct synchronization signal

[0161] PTAG: Primary Timing Advance Group, the primary timing advance group

[0162] PUSCH: Physical uplink shared channel, the physical uplink shared channel

[0163] PUCCH: Physical uplink control channel, the physical uplink control channel

[0164] QCL: Quasi co-location, quasi co-location

[0165] QoS: Quality of Service, quality of service

[0166] QZSS: Quasi-Zenith Satellite System, quasi-zenith satellite system

[0167] RAR: Random Access Response, random access response

[0168] RB: Resource Block, resource block

[0169] RE: Resource Element, resource element

[0170] REG: resource-element group, resource element group

[0171] RF: Radio Frequency, radio frequency

[0172] RLC: Radio Link Control, a radio link control protocol

[0173] RNTI: Radio-Network Temporary Identifier, a radio network temporary identifier

[0174] RRC: Radio Resource Control, a radio resource control

[0175] RV: Redundancy Version, a redundancy version

[0176] S-BWP: Sidelink Bandwidth Part, a sidelink bandwidth part

[0177] S-MIB: Sidelink Master Information Block, a sidelink master information block

[0178] S-PSS: Sidelink Primary Synchronization Signal, a sidelink primary synchronization signal

[0179] S-SSB: Sidelink SS / PBCH block, a sidelink synchronization signal / physical broadcast channel block

[0180] S-SSS: Sidelink Secondary Synchronization Signal, a sidelink secondary synchronization signal

[0181] SCG: Secondary Cell Group, a secondary cell group

[0182] SCI: Sidelink Control Information, a sidelink control information

[0183] SCS: Subcarrier Spacing, a subcarrier spacing

[0184] SDAP: Service Data Adaptation Protocol, a service data adaptation protocol

[0185] SFN: System Frame Number, a system frame number

[0186] SIB: System Information Block, a system information block

[0187] SL: Sidelink, a sidelink

[0188] SL BWP: Sidelink Bandwidth Part, Sidelink Bandwidth Segment

[0189] SL MIB: Sidelink Master Information Block

[0190] SL PSS: Sidelink Primary Synchronization Signal

[0191] SL SS: Sidelink Synchronisation Signal

[0192] SL SSID: Sidelink Synchronization Signal Identity (or Sidelink Synchronization Signal Identifier)

[0193] SL SSB: Sidelink SS / PBCH block

[0194] SL SSS: Sidelink Secondary Synchronization Signal

[0195] SLSS: Sidelink Synchronisation Signal

[0196] SLSS ID: Sidelink Synchronization Signal Identity (or Sidelink Synchronization Signal Identifier)

[0197] SLSSID: Sidelink Synchronization Signal Identity (or Sidelink Synchronization Signal Identifier)

[0198] SpCell: Special Cell

[0199] SRS: Sounding Reference Signal

[0200] SSB: SS / PBCH block, Synchronization Signal / Physical Broadcast Channel block

[0201] SSS: Secondary Synchronization Signal, Secondary Synchronization Signal

[0202] SSSS: Secondary Sidelink Synchronization Signal, Secondary Sidelink Synchronization Signal

[0203] STAG: Secondary Timing Advance Group, Secondary Timing Advance Group

[0204] SUL: Supplementary Uplink, Supplementary Uplink

[0205] TA: Timing Advance, Timing Advance

[0206] TAG: Timing Advance Group, Timing Advance Group

[0207] TB: Transport Block, Transport Block

[0208] TCP: Transmission Control Protocol, Transmission Control Protocol

[0209] TDD: Time Division Duplexing, Time Division Duplexing

[0210] TPC: Transmit power control, Transmit power control

[0211] UE: User Equipment, User Equipment

[0212] UL: Uplink, Uplink

[0213] UMTS: Universal Mobile Telecommunications System, Universal Mobile Telecommunications System

[0214] URLLC: Ultra-Reliable and Low Latency Communication, Ultra-Reliable and Low Latency Communication

[0215] USS: UE-specific Search Space, UE-specific Search Space

[0216] V2I: Vehicle-to-Infrastructure, vehicle to infrastructure

[0217] V2N: Vehicle-to-network, vehicle to network

[0218] V2P: Vehicle-to-Pedestrian, vehicle to pedestrian

[0219] V2V: Vehicle-to-vehicle, vehicle to vehicle

[0220] V2X: Vehicle-to-everything, vehicle to any entity

[0221] Unless otherwise specified, in all embodiments and implementations of the present invention:

[0222] · The SL MIB (Sidelink Master Information Block) can also be referred to as the S-MIB, or MIB-SL. Optionally, when used for V2X services, the SL MIB refers to MIB-SL-V2X.

[0223] · The synchronization reference source can also be referred to as the synchronization reference, or the synchronization source.

[0224] [Embodiment 1]

[0225] The following combines Figure 1 to illustrate the method executed by the user equipment in Embodiment 1 of the present invention.

[0226] Figure 1 is a flowchart showing the method executed by the user equipment according to Embodiment 1 of the present invention.

[0227] As Figure 1 shown, in Embodiment 1 of the present invention, the steps executed by the user equipment UE include: step S101 and step S103.

[0228] Specifically, in step S101, obtain time-domain configuration information and / or time-domain indication information. Among them,

[0229] The time-domain configuration information and / or time-domain indication information may include one or more of the following:

[0230] · Time zero. Among them,

[0231] ◆ Optionally, the zero point of time can use UTC (Coordinated Universal Time), also known as Universal Coordinated Time, or Universal Time Standard, or International Coordinated Time, or can use GMT (Greenwich Mean Time), or can use other time standards and / or time formats.

[0232] ◆ Optionally, the zero point of time can be represented by a numerical value (such as a real number, a decimal, a fraction, or an integer), denoted as T0. For example, T0 = 0.

[0233] ◆ Optionally, the unit of the value of the zero point of time can be milliseconds, seconds, microseconds, nanoseconds, or other time units.

[0234] ◆ Optionally, the zero point of time can be a predefined time. For example, the zero point of time can be 00:00:00 on January 1, 1900 in the Gregorian calendar (at this time, optionally, the zero point of time can also be expressed as the midnight between Thursday, December 31, 1899 and Friday, January 1, 1900).

[0235] ◆ Optionally, the zero point of time can correspond to a zero point of time parameter (such as timeZero). The zero point of time parameter can take a predefined value, or can be configured or pre-configured in a semi-static manner, or can be indicated in a dynamic manner. Among them,

[0236] ο Optionally, the zero point of time parameter can be included in the RRC message or the PC5 RRC message, such as included in the MIB, or included in the SIB, or included in the MIB-SL, or included in the PSBCH payload, or included in the pre-configuration information, or included in the default configuration information, or included in other RRC messages or PC5 RRC messages.

[0237] ο Optionally, the zero point of time parameter can be included in the MAC CE.

[0238] ο Optionally, the zero point of time parameter can be included in the Downlink Control Information (DCI).

[0239] ο Optionally, the zero point of time parameter can be included in the Straight-Ahead Control Information (SCI).

[0240] Optionally, the time zero point may not be explicitly defined. For example, when determining the time (e.g., in milliseconds) elapsed from a first time (e.g., the reference time mentioned below) to a second time (e.g., the target time mentioned below), the elapsed time may be independent of the specific definition of the time zero point.

[0241] · Reference time. Among them,

[0242] Optionally, the reference time may use UTC time, may use GMT time, or may use other time standards and / or time formats.

[0243] Optionally, the reference time may be represented by a numerical value (e.g., a real number, a decimal, a fraction, or an integer), denoted as T ref .

[0244] Optionally, the unit of the value of the reference time may be milliseconds, seconds, microseconds, nanoseconds, or other time units.

[0245] Optionally, the value of the reference time may be equal to the time (e.g., in milliseconds) elapsed from the time zero point to the reference time.

[0246] Optionally, the reference time may be a predefined time. For example, the reference time may be 00:00:00 on January 1, 1900 in the Gregorian calendar (at this time, optionally, the reference time may also be expressed as the midnight between Thursday, December 31, 1899 and Friday, January 1, 1900).

[0247] Optionally, the reference time and the time zero point may be the same time (e.g., at this time, T ref = 0).

[0248] Optionally, the reference time may correspond to a reference time parameter (e.g., refTime). The reference time parameter may take a predefined value, may be configured or pre-configured in a semi-static manner, or may be indicated in a dynamic manner. Among them,

[0249] ο Optionally, the reference time parameter may be included in the RRC message or the PC5 RRC message, such as included in the MIB, or included in the SIB, or included in the MIB-SL, or included in the PSBCH payload, or included in the pre-configured information, or included in the default configuration information, or included in other RRC messages or PC5 RRC messages.

[0250] Optionally, the reference time parameter may be included in the MAC CE.

[0251] Optionally, the reference time parameter may be included in the Downlink Control Information (DCI).

[0252] Optionally, the reference time parameter may be included in the Sidelink Control Information (SCI).

[0253] · Target time. Among them,

[0254] ◆ Optionally, the target time may use Coordinated Universal Time (UTC), or Greenwich Mean Time (GMT), or other time standards and / or time formats.

[0255] ◆ Optionally, the target time may be represented by a numerical value (such as a real number, a decimal, a fraction, or an integer), denoted as T target .

[0256] ◆ Optionally, the unit of the value of the target time may be milliseconds, seconds, microseconds, nanoseconds, or other time units.

[0257] ◆ Optionally, the value of the target time may be equal to the time elapsed from the time zero to the target time (e.g., in milliseconds).

[0258] ◆ Optionally, the target time may be the current time. At this time, optionally, the T target may also be denoted as T current .

[0259] ◆ Optionally, the target time may be a specified time in the past or future.

[0260] ◆ Optionally, the target time may correspond to a target time parameter (such as targetTime), and the target time parameter may take a predefined value, or may be configured or pre-configured in a semi-static manner, or may be indicated in a dynamic manner. Among them,

[0261] ο Optionally, the target time parameter may be included in the RRC message or PC5 RRC message, such as included in the MIB, or in the SIB, or in the MIB-SL, or in the PSBCH payload, or in the pre-configured information, or in the default configuration information, or in other RRC messages or PC5 RRC messages.

[0262] Optionally, the target time parameter may be included in the MAC CE.

[0263] Optionally, the target time parameter may be included in the downlink control information (DCI).

[0264] Optionally, the target time parameter may be included in the straight-ahead control information (SCI).

[0265] ◆ Optionally, the target time may be obtained from GNSS. Among them,

[0266] Optionally, when the UE selects GNSS as the synchronization reference source, the target time is obtained from GNSS.

[0267] Optionally, the GNSS may be GPS (Global Positioning System), or GLONASS (Global Navigation Satellite System), or BeiDou (Beidou Navigation Satellite System), or Galileo (Galileo Navigation Satellite System), or QZSS (Quasi-Zenith Satellite System), or other satellite systems, or a combination of different satellite systems.

[0268] ◆ Optionally, the target time may be obtained from the internal clock of the UE, or from the gNB, or from the eNB, or from other UEs, or from other time sources or clock sources.

[0269] · Timing offset. Among them,

[0270] ◆ Optionally, the timing offset may be represented by a value (such as a real number, or a decimal, or a fraction, or an integer), denoted as Δ T 。

[0271] ◆ Optionally, the unit of the value of the timing offset may be milliseconds, or seconds, or microseconds, or nanoseconds, or other time units.

[0272] ◆ Optionally, the timing offset may be a predefined value. For example, Δ T = 0.

[0273] ◆ Optionally, the timing offset may correspond to a timing offset parameter (e.g., offsetDFN). The timing offset parameter may take a predefined value, or may be configured or pre-configured in a semi-static manner, or may be indicated in a dynamic manner. Among them,

[0274] ο Optionally, the value of the timing offset parameter is from a predefined set. For example, the predefined set may be {0, 1,..., 1000}, where 0 corresponds to 0 milliseconds, 1 corresponds to 0.001 milliseconds, 2 corresponds to 0.002 milliseconds, and so on. Optionally, for each non-zero element x in the predefined set, there is a corresponding element -x.

[0275] ο Optionally, if the timing offset parameter is configured, then Δ T is equal to the value configured by the timing offset parameter, otherwise Δ T = 0.

[0276] ο Optionally, if the timing offset parameter is indicated, then Δ T is equal to the value indicated by the timing offset parameter, otherwise Δ T = 0.

[0277] ο Optionally, the timing offset parameter may be included in an RRC message or a PC5 RRC message, such as included in the MIB, or included in the SIB, or included in the MIB-SL, or included in the PSBCH payload, or included in the pre-configuration information, or included in the default configuration information, or included in other RRC messages or PC5 RRC messages.

[0278] ο Optionally, the timing offset parameter may be included in the MAC CE.

[0279] ο Optionally, the timing offset parameter may be included in the downlink control information (DCI).

[0280] ο Optionally, the timing offset parameter may be included in the sidelink control information (SCI).

[0281] In addition, in step S103, determine the information related to timing according to the time domain configuration information and / or time domain indication information, and / or other information. For example, determine the timing information of the sidelink (SL).

[0282] Among them,

[0283] · Optionally, the sidelink is an interface for communication between UEs. Optionally, the interface can also be referred to as the PC5 interface. Optionally, the communication between UEs can be referred to as sidelink communication, or SL communication (such as V2X SL communication). Optionally, the SL communication occurs between two or more neighboring UEs. Optionally, the SL communication uses NR technology; optionally, at this time, the SL communication can also be referred to as NR SL communication. Optionally, the SL communication does not traverse any network nodes (such as gNB, etc.).

[0284] · Optionally, the timing-related information can be used for SL communication or for other purposes.

[0285] · Optionally, the subcarrier spacing configuration (SCS configuration) corresponding to the sidelink can be μ. For example, the subcarrier spacing configuration (pre)-configured for the SL carrier corresponding to the sidelink is μ. Another example is that the subcarrier spacing configuration (pre)-configured for the SL BWP corresponding to the sidelink is μ. Another example is that the subcarrier spacing configuration (pre)-configured for the SL SSB (or S-SSB) corresponding to the sidelink is μ. Another example is that the subcarrier spacing configuration (pre)-configured for the resource pool corresponding to the sidelink is μ. Among them,

[0286] ◆ Optionally, the subcarrier spacing (SCS) corresponding to μ can be Δf. For example, μ = 0 corresponds to Δf = 15 kHz. Another example is that μ = 1 corresponds to Δf = 30 kHz. Another example is that μ = 2 corresponds to Δf = 60 kHz. Another example is that μ = 3 corresponds to Δf = 120 kHz. Another example is that μ = 4 corresponds to Δf = 240 kHz. Another example is that for any given μ, Δf = 2 μ · 15 kHz.

[0287] · Optionally, in the frame structure corresponding to the sidelink,

[0288] ◆ Optionally, each hyper direct frame (or direct hyper frame) numbering period can contain hyper direct frames. Optionally, can be equal to 1024 or can be equal to other values.

[0289] ◆ Optionally, each hyper direct frame can contain direct frames. Optionally, can be equal to 1024 or can be equal to other values.

[0290] ◆ Optionally, one or more of the super-direct frames, and are not defined.

[0291] ◆ Optionally, each direct frame numbering period may contain direct frames. Optionally, may be equal to 1024 or may be equal to other values.

[0292] ◆ Optionally, each direct frame may contain direct half-frames. Optionally, may be equal to 2 or may be equal to other values.

[0293] ◆ Optionally, each direct frame may contain direct sub-frames. Optionally, may be equal to 10 or may be equal to other values.

[0294] ◆ Optionally, each direct frame may contain direct time slots. Optionally, The value of may be related to μ. For example, if μ = 0, then Another example, if μ = 1, then Another example, if μ = 2, then Another example, if μ = 3, then Another example, if μ = 4, then Another example, for any μ,

[0295] ◆ Optionally, each direct half-frame may contain direct sub-frames. Optionally, may be equal to 5 or may be equal to other values.

[0296] ◆ Optionally, each direct half-frame may contain direct time slots. Optionally, The value of may be related to μ. For example, if μ = 0, then Another example, if μ = 1, then Another example, if μ = 2, then Another example, if μ = 3, then Another example, if μ = 4, then Another example, for any μ,

[0297] ◆ Optionally, each direct sub-frame may contain direct time slots. Optionally, The value of may be related to μ. For example, if μ = 0, then For another example, if μ = 1, then For another example, if μ = 2, then For another example, if μ = 3, then For another example, if μ = 4, then For another example, for any μ,

[0298] ◆ Optionally, the length (or duration, denoted as ) of each direct frame can be equal to 10 milliseconds or can be equal to other values.

[0299] ◆ Optionally, the length (or duration, denoted as ) of each direct half-frame can be equal to 5 milliseconds or can be equal to other values.

[0300] ◆ Optionally, the length (or duration, denoted as ) of each direct sub-frame can be equal to 1 millisecond or can be equal to other values.

[0301] ◆ Optionally, the length (or duration, denoted as ) of each direct time slot can be related to μ. For example, milliseconds; optionally, if then milliseconds. For another example, milliseconds; optionally, if then milliseconds. For another example, milliseconds; optionally, if then milliseconds.

[0302] Figure 2 An example of the frame structure is given, where μ = 1 (corresponding to Δf = 30 kHz), milliseconds, milliseconds, milliseconds, milliseconds. Optionally, Optionally, for the super direct frame, and one or more of them are not defined.

[0303] · Optionally, the timing information of the straight link can include any one or more of the following:

[0304] ◆ Hyper direct frame number (H-DFN), denoted as n hdfn .

[0305] Among them,

[0306] ο Optionally, the hyper direct frame number can be the number of the hyper direct frame within the hyper direct frame numbering period. Optionally, the value set of the hyper direct frame number can be or it can be other sets.

[0307] ο Optionally, the hyper direct frame number can be calculated in any of the following ways:

[0308] ο

[0309] ο

[0310] For example, if milliseconds, then the hyper direct frame number can be calculated in any of the following ways:

[0311] ◇

[0312] ◇

[0313] ◇

[0314] ◆ Direct frame number (DFN), denoted as n dfn . Among them,

[0315] ο Optionally, the direct frame number can be the number of the direct frame within the hyper direct frame numbering period. Optionally, the value set of the direct frame number can be or it can be other sets.

[0316] ο Optionally, the direct frame number can be the number of the direct frame within a hyper direct frame. Optionally, the value set of the direct frame number can be or it can be other sets.

[0317] ο Optionally, the direct frame number can be the number of the direct frame within the direct frame numbering period. Optionally, the value set of the direct frame number can be or it can be other sets.

[0318] ο Optionally, the direct frame number can be calculated in any of the following ways:

[0319] ◇

[0320] ◇

[0321] ◇

[0322] For example, if is in milliseconds, the direct frame number can be calculated in any of the following ways:

[0323] ◇

[0324] ◇

[0325] ◇

[0326] ◇

[0327] ◆ The direct half frame number (DHFN), denoted as n dhfn . Among them,

[0328] ο Optionally, the direct half frame number can be the number of the direct half frame within the super direct frame numbering period. Optionally, the value set of the direct half frame number can be or it can be other sets.

[0329] ο Optionally, the direct half frame number can be the number of the direct half frame within a super direct frame. Optionally, the value set of the direct half frame number can be or it can be other sets.

[0330] ο Optionally, the direct half frame number can be the number of the direct half frame within the direct frame numbering period. Optionally, the value set of the direct half frame number can be or it can be other sets.

[0331] ο Optionally, the direct half frame number can be the number of the direct half frame within a direct frame. Optionally, the value set of the direct half frame number can be or it can be other sets.

[0332] ο Optionally, the direct half frame number can be calculated in any of the following ways:

[0333] ◇

[0334] ◇

[0335] ◇

[0336] ◇

[0337] For example, if milliseconds, the direct half-frame number can be calculated in any of the following ways:

[0338] ◇

[0339] ◇

[0340] ◇

[0341] ◇

[0342] ◇

[0343] ◇

[0344] ◆ The direct subframe number, denoted as n directsubframe 。

[0345] Among them,

[0346] ο Optionally, the direct subframe number can be the number of the direct subframe within the hyper-direct frame numbering period. Optionally, the value set of the direct subframe number can be or can also be or other sets.

[0347] ο Optionally, the direct subframe number can be the number of the direct subframe within a hyper-direct frame. Optionally, the value set of the direct subframe number can be or can also be or other sets.

[0348] ο Optionally, the direct subframe number can be the number of the direct subframe within the direct frame numbering period. Optionally, the value set of the direct subframe number can be or can also be or other sets.

[0349] ο Optionally, the direct subframe number can be the number of the direct subframe within a direct frame. Optionally, the value set of the direct subframe number can be or can also be or other sets.

[0350] Optionally, the direct sub-frame number may be the number of the direct sub-frame within a direct half-frame. Optionally, the value set of the direct sub-frame number may be or may be other sets.

[0351] Optionally, the direct sub-frame number may be calculated in any of the following ways:

[0352] ◇

[0353] ◇

[0354] ◇

[0355] ◇

[0356] ◇

[0357] ◇

[0358] ◇

[0359] ◇

[0360] ◇

[0361] For example, if milliseconds, the direct sub-frame number may be calculated in any of the following ways:

[0362] ◇

[0363] ◇

[0364] ◇

[0365] ◇

[0366] ◆ Direct slot number, denoted as nd irectslot . Among them,

[0367] Optionally, the direct slot number may be the number of the direct slot within the super-direct frame numbering period. Optionally, the value set of the direct slot number may be or may be It can also be It can also be It can also be other sets.

[0368] ο Optionally, the direct time slot number can be the number of the direct time slot within a super direct frame. Optionally, the value set of the direct time slot number can be It can also be It can also be It can also be It can also be other sets.

[0369] ο Optionally, the direct time slot number can be the number of the direct time slot within the direct frame numbering period. Optionally, the value set of the direct time slot number can be It can also be It can also be It can also be It can also be other sets.

[0370] ο Optionally, the direct time slot number can be the number of the direct time slot within a direct frame. Optionally, the value set of the direct time slot number can be It can also be It can also be It can also be It can also be other sets.

[0371] ο Optionally, the direct time slot number can be the number of the direct time slot within a direct half-frame. Optionally, the value set of the direct time slot number can be It can also be It can also be other sets.

[0372] ο Optionally, the direct time slot number can be the number of the direct time slot within a direct sub-frame. Optionally, the value set of the direct time slot number can be It can also be other sets.

[0373] ο Optionally, the direct time slot number can be calculated in any of the following ways:

[0374] ◇

[0375] ◇

[0376] ◇

[0377] ◇

[0378] ◇

[0379]

[0380] ◇

[0381] ◇

[0382] ◇

[0383] ◇

[0384] ◇

[0385] ◇

[0386] ◇

[0387] ◇

[0388] ◇

[0389] ◇

[0390] ◇

[0391] ◇

[0392]

[0393] ◇

[0394] ◇

[0395] ◇

[0396] ◇

[0397] For example, if milliseconds, the direct time slot number can be calculated in any of the following ways:

[0398] ◇

[0399] ◇

[0400] ◇

[0401] ◇

[0402] ◇

[0403] ◇

[0404] ◇

[0405] ◇

[0406] ◇

[0407] ◇

[0408] ◇

[0409] ◇

[0410] Among them,

[0411] Optionally, the "calculation" may also be referred to as "derivation", or as "derivation".

[0412] Optionally, in the above calculations of the super direct frame number, the direct frame number, the direct half frame number, the direct subframe number, and the direct time slot number, it is assumed that the T target , the T ref and the Δ T are in milliseconds. Optionally, the units of the T target , the T ref and the Δ T may be other time units different from milliseconds. In this case, (Tt ar g et -T ref -Δ T ) should be replaced by C·(T target -T ref -Δ T ) so that the unit of C·(T target -T ref -Δ T ) is milliseconds, where C is a constant. For example, if the units of the T target , the T ref and the Δ T are seconds, then C = 1000.

[0413] Optionally, in Embodiment 1 of the present invention, T target -Tref can be replaced by T elapsed , where T elapsed equals the time elapsed from the reference time to the target time. Wherein,

[0414] · Optionally, the T elapsed can be a numerical value, such as a real number, or a decimal, or a fraction, or an integer.

[0415] · Optionally, the T elapsed can have units of milliseconds, or seconds, or microseconds, or nanoseconds, or other time units.

[0416] Optionally, in Embodiment 1 of the present invention, T target -T ref -Δ T can be replaced by T target -T ref +Δ T .

[0417] Optionally, in Embodiment 1 of the present invention, the timing offset may not be defined. At this time, T target -T ref -Δ T can be replaced by Tt ar g et -T r ef.

[0418] Optionally, in Embodiment 1 of the present invention, depending on the the the the the the the the the the the the and the one or more of the values of, for calculating the n hdfn 、the n dfn 、the n dhfn 、the n directsubframe and the n directslot one or more of the formulas for can be simplified or rewritten accordingly. For example, if milliseconds, then equals the number of direct time slots within a direct subframe (i.e., ), so can be replaced by

[0419] Optionally, in the first embodiment of the present invention, the super direct frame may be named in other ways, such as a super system frame, or a super radio frame, or a super sidelink (SL) frame, etc.

[0420] Optionally, in the first embodiment of the present invention, the super direct frame number may be named in other ways, such as a super system frame number, or a super radio frame number, or a super sidelink frame number, etc.

[0421] Optionally, in the first embodiment of the present invention, the direct frame may be named in other ways, such as a system frame, or a radio frame, or a sidelink frame, etc.

[0422] Optionally, in the first embodiment of the present invention, the direct frame number may be named in other ways, such as a system frame number, or a radio frame number, or a sidelink frame number, etc.

[0423] Optionally, in the first embodiment of the present invention, the direct half-frame may be named in other ways, such as a semi-direct frame, or a semi-system frame, or a semi-radio frame, or a half-frame, or a system half-frame, or a radio half-frame, or a sidelink half-frame, etc.

[0424] Optionally, in the first embodiment of the present invention, the direct half-frame number may be named in other ways, such as a semi-direct frame number, or a semi-system frame number, or a semi-radio frame number, or a half-frame number, or a system half-frame number, or a radio half-frame number, or a sidelink half-frame number, etc.

[0425] Optionally, in the first embodiment of the present invention, the direct sub-frame may be named in other ways, such as a sub-frame, or a system sub-frame, or a radio sub-frame, or a sidelink sub-frame, etc.

[0426] Optionally, in the first embodiment of the present invention, the direct sub-frame number may be named in other ways, such as a sub-frame number, or a system sub-frame number, or a radio sub-frame number, or a sidelink sub-frame number, etc.

[0427] Optionally, in the first embodiment of the present invention, the direct time slot may be named in other ways, such as a time slot, or a system time slot, or a radio time slot, or a sidelink time slot, etc.

[0428] Optionally, in the first embodiment of the present invention, the direct time slot number may be named in other ways, such as a time slot number, or a system time slot number, or a radio time slot number, or a sidelink time slot number, etc.

[0429] Optionally, in the first embodiment of the present invention, the UE may be replaced by a base station (such as an eNB, or a gNB, or other types of base stations) or any other entity that can operate on a direct link.

[0430] Optionally, in the first embodiment of the present invention, when the UE selects GNSS as the synchronization reference source, step S101 is executed.

[0431] Optionally, in the first embodiment of the present invention, when the UE selects GNSS as the synchronization reference source, step S103 is executed.

[0432] Optionally, in the first embodiment of the present invention, when the UE selects GNSS as the synchronization reference source, step S101 and step S103 are executed.

[0433] In this way, in the first embodiment of the present invention, by using the current UTC time to deduce the timing-related parameters of the direct link, such as the ultra-direct frame number, direct frame number, direct half-frame number, direct sub-frame number, and direct time slot number, etc., all UEs, base stations, and / or other entities operating on the direct link can be synchronized in terms of timing parameters, ensuring the correct transmission and reception of the UE, base station, and / or other entities on the direct link.

[0434] [Variant Example]

[0435] Next, use Figure 3 to illustrate a user equipment that can execute the method executed by the user equipment described in detail above of the present invention as a variant example.

[0436] Figure 3 is a block diagram showing the user equipment UE involved in the present invention.

[0437] As Figure 3 shown, 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, etc. The memory 602 may include, for example, a volatile memory (such as a random access memory RAM), a hard disk drive (HDD), a non-volatile memory (such as a flash memory), or other memories. Program instructions are stored on the memory 602. When these instructions are run by the processor 601, they can execute the above method executed by the user equipment described in detail in the present invention.

[0438] The method of the present invention and the related devices have been described above in conjunction with the preferred embodiments. Those skilled in the art can understand that the methods shown above are merely exemplary, and the embodiments described above can be combined with each other without conflict. The method of the present invention is not limited to the steps and sequences shown above. The network nodes and user equipment shown above may include more modules. For example, they may also include modules that can be developed or will be developed and can be used for base stations, MMEs, or UEs, etc. The various identifiers shown above are merely exemplary rather than restrictive, and the present invention is not limited to the specific cells that are examples of these identifiers. Those skilled in the art can make many changes and modifications according to the teachings of the illustrated embodiments.

[0439] It should be understood that the above embodiments of the present invention can be implemented by software, hardware, or a combination of both software and hardware. For example, various components inside the base station and user equipment in the above embodiments can be implemented by a variety of devices, including but not limited to: analog circuit devices, digital circuit devices, digital signal processing (DSP) circuits, programmable processors, application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), complex programmable logic devices (CPLDs), and so on.

[0440] In the present application, a "base station" may refer to a mobile communication data and control switching center with a certain transmission power and a certain coverage area, including functions such as resource allocation and scheduling, data reception and transmission, etc. A "user equipment" may refer to a user mobile terminal, such as a mobile phone, a notebook, etc., which are terminal devices capable of wireless communication with a base station or a micro base station.

[0441] In addition, the embodiments of the present invention disclosed herein can be implemented on a computer program product. More specifically, the computer program product is a product that has a computer-readable medium encoded with computer program logic. When executed on a computing device, the computer program logic provides related operations to implement the above technical solutions of the present invention. When executed on at least one processor of a computing system, the computer program logic causes the processor to perform the operations (methods) described in the embodiments of the present invention. Such a setting of the present invention is typically provided as software, code, and / or other data structures set or encoded on a computer-readable medium such as an optical medium (such as a CD-ROM), a floppy disk, or a hard disk, or other media such as firmware or microcode on one or more ROMs or RAMs or PROM chips, or a downloadable software image in one or more modules, a shared database, etc. The software or firmware or such a configuration can be installed on a computing device so that one or more processors in the computing device perform the technical solutions described in the embodiments of the present invention.

[0442] In addition, each functional module or each feature of the base station device and the terminal device used in each of the above embodiments can be implemented or executed by a circuit, and the circuit is generally one or more integrated circuits. The circuit designed to execute each function described in this specification may include a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), or a general integrated circuit, a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic, or discrete hardware components, or any combination of the above devices. The general-purpose processor may be a microprocessor, or the processor may be an existing processor, controller, microcontroller, or state machine. The above general-purpose processor or each circuit may be configured by a digital circuit or may be configured by a logic circuit. In addition, when advanced technologies capable of replacing the current integrated circuits emerge due to the progress of semiconductor technology, the present invention may also use integrated circuits obtained by using such advanced technologies.

[0443] Although the present invention has been shown above in conjunction with the preferred embodiments of the present invention, those skilled in the art will understand that various modifications, substitutions, and changes can be made to the present invention without departing from the spirit and scope of the present invention. Therefore, the present invention should not be limited by the above embodiments, but should be defined by the appended claims and their equivalents.

Claims

1. A user equipment (UE) comprising: a processor; and a memory storing instructions, wherein, based on the instructions, the processor is configured to: select a Global Navigation Satellite System (GNSS) as a synchronization reference source; Derive the time slot number n within the frame slot ; and Using the time slot number n slot Perform New Radio (NR) straight-through communication, where The time slot number n slot is derived according to the following formula: wherein Parameter T current is the current UTC time obtained from the GNSS, Parameter T current expressed in milliseconds, Parameter T ref is referenced to the Gregorian calendar UTC time of January 1, 1900, 00:00:00, Parameter T ref expressed in milliseconds, If the timing offset radio resource control (RRC) parameter is configured, the parameter Δ T is equal to the value configured by the RRC parameter and is used to derive the time slot number n slot , If the RRC parameter is not configured, the parameter Δ T is equal to 0, Parameter Δ T is expressed in milliseconds and The parameter μ is a subcarrier spacing (SCS) configuration for NR direct communication.

2. The UE according to claim 1, wherein the parameter μ is equal to one of the values 0, 1, 2, and 3 corresponding to SCSs of 15 kHz, 30 kHz, 60 kHz, and 120 kHz respectively.

3. A method performed by a user equipment (UE), comprising: selecting a Global Navigation Satellite System (GNSS) as a synchronization reference source; Derive the time slot number n within the frame slot ; and Using the time slot number n slot Perform New Radio (NR) straight-through communication, where The time slot number n slot is derived according to the following formula: Among them Parameter T current is the current UTC time obtained from the GNSS, Parameter T current expressed in milliseconds, Parameter T ref is referenced to the Gregorian calendar UTC time of January 1, 1900, 00:00:00, Parameter T ref expressed in milliseconds, If the timing offset radio resource control (RRC) parameter is configured, the parameter Δ T is equal to the value configured by the RRC parameter and is used to derive the time slot number n slot , If the RRC parameter is not configured, the parameter Δ T is equal to 0, Parameter Δ T is expressed in milliseconds and the parameter μ is a subcarrier spacing (SCS) configuration for NR direct communication.

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