Method executed by user equipment, and user equipment

Abstract

The present invention provides a method executed by a user equipment (UE) and a UE. In the method executed by the UE, the UE is a sidelink communication UE capable of performing sidelink communication. The method comprises: a higher layer requests the sidelink communication UE to determine a resource subset for physical sidelink communication shared channel (PSSCH) / physical sidelink communication control channel (PSCCH) transmission; the sidelink communication UE determines a candidate resource set SA; and the sidelink communication UE removes one or more candidate resources from the candidate resource set SA.

Description

Method performed by user equipment and user equipment Technical Field

[0001] The present invention relates to the technical field of wireless communications, and in particular to a method executed by a user equipment and corresponding user equipment. Background Art

[0002] In traditional cellular networks, all communications must go through the base station. In contrast, D2D (Device-to-Device) communication refers to direct communication between two user devices without forwarding through the base station or core network. At the RAN#63 plenary meeting of the 3rd Generation Partnership Project (3GPP) in March 2014, a research project on implementing proximity-based D2D communication services using LTE devices was approved (see Non-Patent Document 1). LTE Release 12 introduces D2D features including:

[0003] 1) Discovery between nearby devices in LTE network coverage scenarios;

[0004] 2) Direct broadcast communication between nearby devices (Broadcast function);

[0005] 3) The upper layer supports unicast and multicast communication functions.

[0006] At the 3GPP RAN#66 plenary meeting in December 2014, the enhanced LTE eD2D (enhanced D2D) research project was approved (see Non-Patent Document 2). The main features introduced in LTE Release 13 eD2D include:

[0007] 1) D2D discovery in scenarios with no network coverage and partial network coverage;

[0008] 2) Priority processing mechanism for D2D communication.

[0009] Based on the design of D2D communication mechanisms, the 3GPP RAN#68 plenary meeting in June 2015 approved a feasibility study on V2X based on D2D communication. V2X, standing for Vehicle to Everything, aims to enable information exchange between vehicles and all entities that may affect them. The goal is to reduce accidents, ease traffic congestion, reduce environmental pollution, and provide other information services. V2X application scenarios primarily include four areas:

[0010] 1) V2V, Vehicle to Vehicle, i.e. vehicle-to-vehicle communication;

[0011] 2) V2P, Vehicle to Pedestrian, where a vehicle sends a warning to a pedestrian or non-motor vehicle;

[0012] 3) V2N, Vehicle to Network, which refers to vehicles connecting to mobile networks;

[0013] 4) V2I, Vehicle to Infrastructure, refers to the communication between vehicles and road infrastructure.

[0014] 3GPP divides the research and standardization work of V2X into three phases. The first phase was completed in September 2016, focusing mainly on V2V, based on LTE Release 12 and Release 13 D2D (also known as sidelink communication), that is, proximity communication technology (see non-patent document 3). V2X stage 1 introduced a new D2D communication interface called the PC5 interface. The PC5 interface is mainly used to solve the communication problems of cellular vehicle networks in high-speed (up to 250 km / h) and high-node density environments. Vehicles can exchange information such as location, speed and direction through the PC5 interface, that is, vehicles can communicate directly through the PC5 interface. Compared with the proximity communication between D2D devices, the functions introduced by LTE Release 14 V2X mainly include:

[0015] 1) Higher density DMRS to support high-speed scenarios;

[0016] 2) Introducing sub-channels to enhance resource allocation;

[0017] 3) Introducing a user equipment sensing mechanism with semi-persistent scheduling.

[0018] The second phase of the V2X research project falls within the scope of LTE Release 15 (see Non-Patent Document 4). The main features introduced include high-order 64QAM modulation, V2X carrier aggregation, short TTI transmission, and feasibility studies of transmit diversity.

[0019] At the 3GPP RAN#80 plenary meeting in June 2018, the corresponding third phase V2X feasibility study topic based on 5G NR network technology (see non-patent document 5) was approved.

[0020] The 5G NR V2X project supports resource allocation mode 2 based on user equipment sensing, also known as transmission mode 2. In resource allocation mode 2 based on user equipment sensing, the physical layer of the user equipment senses the transmission resources in the resource pool. The user equipment determines whether to exclude resources in the candidate resource set that overlap with the resources indicated by the SCI received from other user equipment based on the indication information in the SCI. The resources in the candidate resource set that are not excluded are reported to higher layers.

[0021] At the 3GPP RAN#95e plenary meeting in March 2022, a standardization research topic on the evolution of NR sidelink communications (NR SL evo) based on the already standardized NR was approved (see Non-Patent Document 6). The research objectives of NR SL evo include the following:

[0022] 1) Study and standardize LTE sidelink and NR sidelink co-channel (or, carrier) coexistence (co-channel coexistence), i.e., scenarios where LTE sidelink and NR sidelink communication frequencies are the same or overlap. For LTE sidelink communication devices and NR sidelink communication devices using the same communication frequency, design an efficient resource allocation method to ensure that the communication of the two sidelink communication devices is not affected.

[0023] The solution of this patent mainly includes a method for an NR sidelink communication user equipment to remove candidate resources from a candidate resource set in a scenario where LTE sidelink and NR sidelink share a channel, or a method for an NR sidelink communication user equipment to select (or reselect) resources.

[0024] Prior art literature

[0025] Non-patent literature

[0026] Non-Patent Literature 1: RP-140518, Work Item Proposal on LTE Device to Device Proximity Services

[0027] Non-Patent Document 2: RP-142311, Work Item Proposal for Enhanced LTE Device to Device Proximity Services

[0028] Non-Patent Document 3: RP-152293, New WI proposal: Support for V2V services based on LTE sidelink

[0029] Non-Patent Document 4: RP-170798, New WID on 3GPP V2X Phase 2

[0030] Non-Patent Document 5: RP-181480, New SID Proposal: Study on NR V2X

[0031] Non-Patent Literature 6: RP-220300, WID revision: NR sidelink evolution

[0032] Summary of the Invention

[0033] In order to solve at least part of the above problems, the present invention provides a method performed by a user equipment and the user equipment.

[0034] According to a first aspect of the present invention, a method is provided for execution by a user equipment UE, wherein the user equipment UE is a sideline communication user equipment capable of sideline communication, the method comprising: a high layer requesting the sideline communication user equipment to determine a resource subset for transmission of a physical sideline communication shared channel PSSCH / physical sideline communication control channel PSCCH; the sideline communication user equipment determining a candidate resource set S A and the sideline communication user equipment from the candidate resource set S A Remove one or more candidate resources.

[0035] In the method of the first aspect above, preferably, the higher layer selects sideline communication resources for PSSCH / PSCCH transmission from the resource subset.

[0036] In the method of the first aspect above, preferably, the higher layer requests the sideline communication user equipment to determine a resource subset for PSSCH / PSCCH transmission in time slot n.

[0037] In the method of the first aspect above, preferably, the sideline communication user equipment is equipped with both an LTE sideline communication module and an NR sideline communication module.

[0038] In the method of the first aspect above, preferably, the candidate resource set S A Indicates the candidate resources in the resource selection window [n+T1, n+T2].

[0039] In the method of the first aspect above, preferably, the user equipment UE receives the data from the S when the LTE sideline communication and the NR sideline communication coexist on the same channel. A Remove one or more candidate resources.

[0040] In the method of the first aspect above, preferably, the user equipment receives data from the S A Remove one or more candidate resources R x，y , at least the following conditions must be met:

[0041] Condition 1: The resource pool for the NR sideline communication overlaps with the resource pool for the LTE sideline communication;

[0042] Condition 2: The user equipment UE does not monitor the subframe of the LTE sideline communication

[0043] Condition 3: The user equipment UE is in the subframe A hypothetical LTE sideline communication SCI is received, and the LTE sideline communication SCI indicates all subchannels and PSCCH resources in the LTE sideline communication resource pool, and all subchannels and PSCCH resources in the LTE sideline communication resource pool are consistent with Phase overlap, where j = 0, 1, ..., C resel -1, described represents the resource reservation period sent by the user equipment UE indicated by the upper layer, the T′ max Indicates the number of time slots in the resource pool within 10240ms.

[0044] In the method of the first aspect above, preferably, the user equipment UE receives data from the S A Remove one or more candidate resources R x，y , at least the following conditions must be met:

[0045] Condition 1: The user equipment UE has a sidewalk communication scheduling grant selected for LTE sidewalk communication;

[0046] Condition 2: The resource blocks included in the sideline communication scheduling permission selected in the resource selection window [n+T1, n+T2] and Phase overlap, where j = 0, 1, ..., C resel -1, described represents the resource reservation period sent by the user equipment UE indicated by the upper layer, the T′ max Indicates the number of time slots in the resource pool within 10240ms;

[0047] Condition 3: The priority value associated with the selected side communication scheduling permission is lower than the sending priority value of the NR side communication.

[0048] In addition, according to a second aspect of the present invention, a user equipment is provided, comprising: a processor; and a memory storing instructions, wherein the instructions execute the method described above when executed by the processor.

[0049] Effects of the Invention

[0050] According to the method performed by the user equipment and the user equipment of the present invention, in the scenario where LTE sidelink and NR sidelink co-exist on the same channel, it can be ensured that the transmission resources selected by the NR sidelink communication user equipment do not overlap or conflict with the transmission resources of the LTE sidelink communication, thereby effectively reducing the system impact on the existing LTE sidelink communication (i.e., reducing interference), and at the same time, can improve the reliability of the NR sidelink communication. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] The above and other features of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which:

[0052] FIG1 is a schematic diagram illustrating a basic process of a method executed by a user equipment in Embodiment 1 and Embodiment 2 of the present invention.

[0053] FIG2 is a block diagram illustrating a user equipment according to an embodiment of the present invention. DETAILED DESCRIPTION

[0054] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the present invention is not limited to the specific embodiments described below. In addition, for the sake of simplicity, detailed descriptions of known technologies that are not directly related to the present invention are omitted to prevent confusion in understanding the present invention.

[0055] The following describes multiple embodiments of the present invention using a 5G mobile communication system and its subsequent evolutionary versions as example application environments. However, it should be noted that the present invention is not limited to the following embodiments, but is applicable to many other wireless communication systems, such as communication systems after 5G and 4G mobile communication systems before 5G.

[0056] The following describes some of the terms involved in the present invention. Unless otherwise specified, the terms used in the present invention are defined herein. The terms given in the present invention may be named differently in LTE, LTE-Advanced, LTE-Advanced Pro, NR, and later communication systems. However, the present invention adopts unified terminology. When applied to a specific system, the terms can be replaced with the terms used in the corresponding system.

[0057] 3GPP: 3rd Generation Partnership Project

[0058] LTE: Long Term Evolution

[0059] NR: New Radio, New Wireless, New Air Interface

[0060] PDCCH: Physical Downlink Control Channel, physical downlink control channel

[0061] DCI: Downlink Control Information, downlink control information

[0062] PDSCH: Physical Downlink Shared Channel, physical downlink shared channel

[0063] UE: User Equipment

[0064] eNB: evolved NodeB

[0065] gNB: NR base station

[0066] TTI: Transmission Time Interval, transmission time interval

[0067] OFDM: Orthogonal Frequency Division Multiplexing

[0068] CP-OFDM: Cyclic Prefix Orthogonal Frequency Division Multiplexing, orthogonal frequency division multiplexing with cyclic prefix

[0069] C-RNTI: Cell Radio Network Temporary Identifier, cell radio network temporary identifier

[0070] CSI: Channel State Information

[0071] HARQ: Hybrid Automatic Repeat Request

[0072] CSI-RS: Channel State Information Reference Signal

[0073] CRS: Cell Reference Signal, cell-specific reference signal

[0074] PUCCH: Physical Uplink Control Channel, physical uplink control channel

[0075] PUSCH: Physical Uplink Shared Channel, physical uplink shared channel

[0076] UL-SCH: Uplink Shared Channel, uplink shared channel

[0077] CG: Configured Grant, configured scheduling permission

[0078] Sidelink: Sidelink communication

[0079] SCI: Sidelink Control Information, sidelink communication control information

[0080] PSCCH: Physical Sidelink Control Channel, physical sidelink communication control channel

[0081] MCS: Modulation and Coding Scheme, modulation and coding scheme

[0082] RB: Resource Block

[0083] RE:Resource Element

[0084] CRB: Common Resource Block

[0085] CP: Cyclic Prefix

[0086] PRB: Physical Resource Block, physical resource block

[0087] PSSCH: Physical Sidelink Shared Channel, physical sidelink communication shared channel

[0088] FDM: Frequency Division Multiplexing

[0089] RRC: Radio Resource Control

[0090] RSRP: Reference Signal Receiving Power, reference signal receiving power

[0091] SRS: Sounding Reference Signal, detection reference signal

[0092] DMRS: Demodulation Reference Signal

[0093] CRC: Cyclic Redundancy Check

[0094] PSDCH: Physical Sidelink Discovery Channel, physical sidelink communication discovery channel

[0095] PSBCH: Physical Sidelink Broadcast Channel, physical sidelink communication broadcast channel

[0096] SFI: Slot Format Indication, slot format indication

[0097] TDD: Time Division Duplexing

[0098] FDD: Frequency Division Duplexing

[0099] SIB1: System Information Block Type 1, system information block type 1

[0100] SLSS: Sidelink synchronization Signal, sidelink communication synchronization signal

[0101] PSSS: Primary Sidelink Synchronization Signal, sidelink communication primary synchronization signal

[0102] SSSS: Secondary Sidelink Synchronization Signal, sideline communication auxiliary synchronization signal

[0103] PCI: Physical Cell ID, physical cell identifier

[0104] PSS: Primary Synchronization Signal

[0105] SSS: Secondary Synchronization Signal

[0106] BWP: BandWidth Part, bandwidth fragment / part

[0107] GNSS: Global Navigation Satellite System

[0108] SFN: System Frame Number, system (wireless) frame number

[0109] DFN: Direct Frame Number, direct frame number

[0110] IE: Information Element

[0111] SSB: Synchronization Signal Block, synchronization system information block

[0112] EN-DC: EUTRA-NR Dual Connection, LTE-NR dual connectivity

[0113] MCG: Master Cell Group

[0114] SCG: Secondary Cell Group

[0115] PCell: Primary Cell

[0116] SCell: Secondary Cell

[0117] PSFCH: Physical Sidelink Feedback Channel, physical sidelink communication feedback channel

[0118] SPS: Semi-Persistant Scheduling

[0119] TA: Timing Advance, uplink timing advance

[0120] PT-RS: Phase-Tracking Reference Signals, phase tracking reference signal

[0121] TB: Transport Block

[0122] CB: Code Block, coding block / code block

[0123] QPSK: Quadrature Phase Shift Keying, quadrature phase shift keying

[0124] 16 / 64 / 256 QAM: 16 / 64 / 256 Quadrature Amplitude Modulation, quadrature amplitude modulation

[0125] AGC: Auto Gain Control, automatic gain control

[0126] TDRA(field): Time Domain Resource Assignment, time domain resource allocation indication (field)

[0127] FDRA(field): Frequency Domain Resource Assignment, frequency domain resource allocation indication (field)

[0128] ARFCN: Absolute Radio Frequency Channel Number, absolute radio frequency channel number

[0129] SC-FDMA: Single Carrier-Frequency Division Multiple Access

[0130] MAC: Medium Access Control

[0131] DRX: Discontinuous Reception

[0132] The following is a description of the prior art associated with the present invention. Unless otherwise specified, the same terms in the specific embodiments and the prior art have the same meanings.

[0133] It is worth noting that V2X and sidelink in this specification have the same meaning. V2X in this document can also refer to sidelink; similarly, sidelink in this document can also refer to V2X. No specific distinction or limitation is made in the following text.

[0134] The resource allocation mode of V2X (sidelink) communication in the specification of the present invention can be equivalently replaced with the transmission mode of V2X (sidelink) communication. The resource allocation mode mentioned in the specification can represent the transmission mode, and the transmission mode mentioned can represent the resource allocation mode. In NR sidelink communication, transmission mode 1 represents a transmission mode (resource allocation mode) based on base station scheduling; transmission mode 2 represents a transmission mode (resource allocation mode) based on user equipment sensing and resource selection.

[0135] The PSCCH in the specification of the present invention is used to carry SCI. The PSCCH corresponding to, or corresponding to, or related to, or scheduled PSSCH involved in the specification of the present invention have the same meaning, all indicating associated PSSCH or corresponding PSSCH. Similarly, the SCI (including first-level SCI and second-level SCI) corresponding to, or corresponding to, or related to, the PSSCH involved in the specification have the same meaning, all indicating associated SCI or corresponding SCI. It is worth noting that the first-level SCI is called lst stage SCI or SCI format 1-A, which is transmitted in PSCCH; the second-level SCI is called 2nd stage SCI or SCI format 2-A (or, SCI format 2-B), which is transmitted in the corresponding PSSCH resources.

[0136] Parameter set (numerology) in NR (including NR sidelink) and time slot in NR (including NR sidelink)

[0137] The parameter set numerology includes two aspects: subcarrier spacing and cyclic prefix (CP) length. NR supports five subcarrier spacings: 15k, 30k, 60k, 120k, and 240kHz (corresponding to μ = 0, 1, 2, 3, and 4). Table 4.2-1 shows the supported transmission parameter sets, as shown below.

[0138] Table 4.2-1 Subcarrier spacing supported by NR

[0139] Extended CP is supported only when μ = 2, that is, with a 60kHz subcarrier spacing. For other subcarrier spacings, only normal CP is supported. For normal CP, each slot contains 14 OFDM symbols; for extended CP, each slot contains 12 OFDM symbols. For μ = 0, that is, with a 15kHz subcarrier spacing, 1 slot = 1ms; for μ = 1, that is, with a 30kHz subcarrier spacing, 1 slot = 0.5ms; for μ = 2, that is, with a 60kHz subcarrier spacing, 1 slot = 0.25ms, and so on.

[0140] NR and LTE have the same definition of subframe, which is 1ms. For the subcarrier spacing configuration μ, the slot number within 1 subframe (1ms) can be expressed as Range is 0 to The slot number within a system frame (frame, duration 10ms) can be expressed as Range is 0 to in, and The definitions of different subcarrier spacing μ are shown in the following table.

[0141] Table 4.3.2-1: Number of symbols in each slot, number of slots in each system frame, and number of slots in each subframe under normal CP

[0142] Table 4.3.2-2: Number of symbols per slot, number of slots per system frame, and number of slots per subframe when using extended CP (60kHz)

[0143] On NR carriers, the system frame (or simply frame) number (SFN) ranges from 0 to 1023. The concept of a direct system frame number (DFN) is introduced for sidelink communications, also ranging from 0 to 1023. The above description of the relationship between system frames and numerology also applies to direct system frames. For example, the duration of a direct system frame is also equal to 10ms. For a 15kHz subcarrier spacing, a direct system frame consists of 10 time slots, and so on. DFN is used for timing on the sidelink carrier.

[0144] Parameter sets in LTE (including LTE V2X) and time slots and subframes in LTE (including LTE V2X)

[0145] LTE only supports a subcarrier spacing of 15 kHz. LTE supports both extended and normal carrier spacing (CP). A subframe is 1 ms long and consists of two time slots, each 0.5 ms long.

[0146] For a normal CP, each subframe contains 14 OFDM symbols, and each slot in the subframe contains 7 OFDM symbols; for an extended CP, each subframe contains 12 OFDM symbols, and each slot in the subframe contains 6 OFDM symbols.

[0147] Resource blocks RB and resource elements RE

[0148] Resource blocks RB are defined in the frequency domain as For example, for a subcarrier spacing of 15kHz, the RB is 180kHz in the frequency domain. μ , the resource element RE represents 1 subcarrier in the frequency domain and 1 OFDM symbol in the time domain.

[0149] Sidelink communication scenarios

[0150] 1) Out-of-Coverage sidelink communication: Both UEs performing sidelink communication have no network coverage (for example, the UE cannot detect any cell that meets the "cell selection criteria" on the frequency required for sidelink communication, indicating that the UE has no network coverage).

[0151] 2) In-Coverage Sidelink Communication: Both UEs performing sidelink communication have network coverage (for example, the UE detects at least one cell that meets the "cell selection criteria" on the frequency required for sidelink communication, indicating that the UE has network coverage).

[0152] 3) Partial-Coverage Sidelink Communication: One of the UEs performing sidelink communication has no network coverage, while the other UE has network coverage.

[0153] From the UE's perspective, there are only two scenarios: no network coverage and network coverage. Partial network coverage is described from the perspective of sidelink communication.

[0154] Sidelink resource pool

[0155] In sidelink communication, the resources used by the UE for both transmission and reception belong to the resource pool. For example, for a transmission mode based on base station scheduling in sidelink communication, the base station schedules transmission resources for the sidelink UE in the resource pool, or for a transmission mode based on UE perception in sidelink communication, the UE determines transmission resources in the resource pool.

[0156] In the description of the present invention, the reference numerals Indicates the subframes (or time slots) that may belong to the sideline communication resource pool, that is, the subframe (or time slot) set obtained before applying the resource pool configuration information (bitmap). It represents the time slots (or subframes) of the sideline communication resource pool, that is, the set of time slots (or subframes) obtained after applying the resource pool configuration information (bitmap).

[0157] Perception-based resource allocation (resource allocation mode 2 in NR sideline communications, resource allocation mode 4 in LTE sideline communications, also known as transmission mode 4)

[0158] For the perception-based resource allocation method, the sidelink communication user equipment selects candidate resources within a time window, and determines the candidate resources that overlap with the reserved resources based on the reserved resources indicated by the PSCCH sent by other user equipment in the monitoring time slot, and excludes these overlapping candidate resources. The physical layer reports the set of candidate resources that are not excluded to the MAC layer, and the MAC layer selects transmission resources for PSSCH / PSCCH. The set of transmission resources selected by the MAC layer is called the selected sidelink grant. When the selected sidelink grant is used to transmit multiple different transmission blocks TB, the resources contained in the grant are periodic, and the period can be expressed as P rsvp_TX , which can also be called the reserved resource interval.

[0159] LTE V2X Transmission Mode 4 Reserved Resources

[0160] In LTE V2X transmission mode 4, when the UE determines the resources for sending sidelink communication through the sensing process, the UE will reserve resources for periodic service data. Assume that the subframe resources for sending PSSCH determined by the UE are represented as subframe Then the UE in the subframe Reserve resources on the top. Where j = 1, 2, ..., C resel -1, C resel =10×SL_RESOURCE_RESELECTION_COUNTER, SL_RESOURCE_RESELECTION_COUNTER is configured by the upper layer. If the upper layer is not configured, then C resel =1. P rsvp_TX′ =P step ×P rsvp_TX / 100. LTE V2X includes periodic services, and the service generation period is approximately P serv =100ms. Among them, P step Indicates that in P serv The following table 1 shows the number of uplink subframes available in LTE V2X. step The value of different TDD uplink and downlink configuration information. For example, for TDD UL / DL configuration information 2, each system frame contains 2 uplink subframes. serv = A service cycle of 100ms includes 20 uplink subframes in total.

[0161] Table 1 P step Determination

[0162] Prsvp_TX Indicates the resource reservation interval indicated by the upper layer.

[0163] LTE V2X UE determines the resource reservation indication field in SCI format 1

[0164] The resource reservation interval indicated by the upper layer is denoted as P rsvp_TX UE determines X=P according to the upper layer instruction rsvp_TX By combining the value of / 100 with the following Table 2, the UE can determine the resource reservation indication field (4-bit indication field) in the SCI.

[0165] Table 2

[0166] Resource selection window [n+T1, n+T2]

[0167] In the resource allocation method based on sensing (or partial sensing), the upper layer requests or triggers the physical layer to determine the resources for PSSCH / PSCCH transmission (perform sensing or partial sensing) in time slot n. The resource selection window is defined as [n+T1, n+T2], that is, the user equipment selects the transmission resources within this window. Among them, T1 meets the condition The selection of T1 depends on the implementation of the user equipment; the RRC configuration information contains a resource selection window configuration list sl-SelectionWindowList, where the list corresponds to a given priority prio TX The element of (priority of transmitting PSSCH) is represented by T 2min If the T 2min Less than the remaining packet delay budget (remaining PDB), then T2 satisfies the condition T 2min ≤T2≤remaining PDB, the selection of T2 depends on the implementation of the user equipment; otherwise T2 is set to remaining PDB. The definition of is as follows (μ SL Indicates the subcarrier spacing parameter of side communication, that is, the subcarrier spacing is ):

[0168] Table 8.1.4-2: The value of

[0169] Table 8.1.4-1: The value of

[0170] Sideline communication user equipment with dual modules

[0171] In the scenario where LTE sidelink and NR sidelink co-exist on the same channel, at least a sidelink communication user equipment equipped with both an LTE sidelink communication module and an NR sidelink communication module is supported, that is, the sidelink communication user equipment can perform both the transceiver function of LTE sidelink communication and the transceiver function of NR sidelink communication. It is worth noting that in this type of user equipment, the LTE sidelink communication module (LTE sidelink module) can share (or indicate) information to the NR sidelink communication module (NR sidelink module), and the information can be resource reservation information of LTE sidelink, or sensing information, etc. The NR sidelink communication module can also obtain the resource pool configuration information of LTE sidelink communication, the configuration information of LTE sidelink SLSS, etc., that is, including but not limited to the above information, without the need for the LTE sidelink module to share (or indicate).

[0172] Candidate single-slot resource R x,y

[0173] Assume that the number of sub-channels for the sideline communication user equipment to send PSSCH is L subCH . R x，y Indicates time slot Upper L subCH consecutive subchannels (subchannel x to subchannel x+L subCH -1).

[0174] PSCCH resources in LTE V2X

[0175] For LTE V2X sideline communication, if the PSCCH and the corresponding PSSCH are configured to be transmitted in adjacent resource blocks within a subframe, the resource block number of the PSCCH resource numbered m is n. PRB =nsubCHRBstart+m×n subCHsize +j, where j = 0, 1, nsubCHRBstart represents the subchannel starting resource block number, n subCHsize Indicates the number of resource blocks contained in the subchannel. nsubCHRBstart and n subCHsize All are configured or pre-configured by RRC signaling.

[0176] If the PSCCH and the corresponding PSSCH are configured to be transmitted in non-adjacent resource blocks within a subframe, the resource block number of the PSCCH resource numbered m is n.PRB =nPSCCHstart+2×m+j, where j=0, 1, and nPSCCHstart represents the number of the PSCCH starting resource block configured through RRC signaling or pre-configured.

[0177] Hereinafter, specific examples and embodiments of the present invention will be described in detail. As described above, the examples and embodiments described in this disclosure are provided for illustrative purposes to facilitate understanding of the present invention and are not intended to limit the present invention.

[0178] [Example 1]

[0179] FIG1 is a schematic diagram illustrating a basic process of a method executed by a user equipment according to a first embodiment of the present invention.

[0180] The method executed by the user equipment according to the first embodiment of the present invention will be described in detail below with reference to the basic process diagram shown in FIG1 .

[0181] As shown in FIG1 , in the first embodiment of the present invention, the steps performed by the user equipment include:

[0182] Step S101: A higher layer (or upper layer) requests (or triggers) a sideline communication user equipment (physical layer) to determine a resource subset for PSSCH / PSCCH transmission.

[0183] The higher layer selects sideline communication resources for PSSCH / PSCCH transmission from the resource subset.

[0184] The higher layer requests the user equipment to determine a resource subset for PSSCH / PSCCH transmission in time slot n.

[0185] Optionally, the sideline communication user equipment is a sideline communication user equipment equipped with both an LTE sideline communication module and an NR sideline communication module.

[0186] Step S102: The sideline communication user equipment determines a candidate resource set S A .

[0187] Optionally, the candidate resource set S A Indicates the candidate resources in the resource selection window [n+T1, n+T2].

[0188] Step S103: The sideline communication user equipment selects the candidate resource set S A Remove (exclude) one or more candidate resources.

[0189] Optionally, the user equipment receives data from the S when LTE sideline communication and NR sideline communication coexist on the same channel. A Remove one or more candidate resources.

[0190] Wherein, the user equipment is from the S A Remove one or more candidate resources R x，y , at least the following conditions must be met:

[0191] 1. The resource pool for the NR sideline communication overlaps with the resource pool for the LTE sideline communication;

[0192] 2. The user equipment does not monitor the subframe of the LTE sideline communication

[0193] 3. The user equipment in the subframe A hypothetical LTE side communication SCI is received, and the LTE side communication SCI indicates all subchannels and (all) PSCCH resources in the LTE side communication resource pool, and all subchannels and (all) PSCCH resources in the LTE side communication resource pool are Phase overlap, where j = 0, 1, ..., C resel -1, The P rsvp_TX Indicates the resource reservation period sent by the user equipment as indicated by the upper layer. max Indicates the number of time slots in the resource pool within 10240ms (SFN or DFN 0-1023).

[0194] [Example 2]

[0195] FIG1 is a schematic diagram illustrating a basic process of a method executed by a user equipment according to a second embodiment of the present invention.

[0196] The method executed by the user equipment according to the second embodiment of the present invention will be described in detail below with reference to the basic process diagram shown in FIG1 .

[0197] In the second embodiment of the present invention, the steps performed by the user equipment include:

[0198] Step S101: A higher layer requests a sideline communication user equipment to determine a resource subset for PSSCH / PSCCH transmission.

[0199] The higher layer selects sideline communication resources for PSSCH / PSCCH transmission from the resource subset.

[0200] The higher layer requests the user device to determine a resource subset for PSSCH / PSCCH transmission in time slot n.

[0201] Optionally, the sideline communication user equipment is a sideline communication user equipment equipped with both an LTE sideline communication module and an NR sideline communication module.

[0202] Step S102: The sideline communication user equipment determines a candidate resource set S A .

[0203] Optionally, the candidate resource set S A Indicates the candidate resources in the resource selection window [n+T1, n+T2].

[0204] Step S103: The sideline communication user equipment selects the candidate resource set S A Remove one or more candidate resources.

[0205] Optionally, the user equipment receives data from the S when LTE sideline communication and NR sideline communication coexist on the same channel. A Remove one or more candidate resources.

[0206] Wherein, the user equipment is from the S A Remove one or more candidate resources R x，y , at least the following conditions must be met:

[0207] 1. The user equipment has a selected sidelink grant for LTE sidelink communication;

[0208] 2. The resource block resources and Phase overlap, where j = 0, 1, ..., C resel -1, The P rsvp_TX Indicates the resource reservation period sent by the user equipment as indicated by the upper layer. max Indicates the number of time slots in the resource pool within 10240ms (SFN or DFN 0-1023);

[0209] 3. The priority value associated with the selected side communication scheduling permission is lower than the sending priority value of the NR side communication.

[0210] FIG2 is a block diagram illustrating a user equipment (UE) according to the present invention. As shown in FIG2 , the user equipment (UE) 20 includes a processor 201 and a memory 202. Processor 201 may include, for example, a microprocessor, a microcontroller, or an embedded processor. Memory 202 may include, for example, a volatile memory (e.g., a random access memory (RAM), a hard disk drive (HDD), a non-volatile memory (e.g., a flash memory), or other memory. Memory 202 stores program instructions. When executed by processor 201, these instructions may execute the method described in detail herein.

[0211] 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 will understand that the method shown above is only exemplary, and the various embodiments described above can be combined with each other when no contradiction occurs. The method of the present invention is not limited to the steps and sequence shown above. The network node and user equipment shown above may include more modules, for example, modules that can be developed or developed in the future and can be used for base stations, MMEs, or UEs, etc. The various identifiers shown above are only exemplary and not restrictive, and the present invention is not limited to the specific information elements used as examples of these identifiers. Those skilled in the art can make many changes and modifications based on the teachings of the illustrated embodiments.

[0212] It should be understood that the above embodiments of the present invention can be implemented through software, hardware, or a combination of software and hardware. For example, the various components within the base station and user equipment in the above embodiments can be implemented through 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), programmable logic devices (CPLDs), and the like.

[0213] In this application, "base station" refers to a mobile communication data and control switching center with high transmission power and wide coverage area, including functions such as resource allocation and scheduling, and data reception and transmission. "User equipment" refers to a user's mobile terminal, such as a mobile phone or laptop, that can communicate wirelessly with a base station or micro base station.

[0214] 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 as follows: having a computer-readable medium, on which computer program logic is encoded, and when executed on a computing device, the computer program logic provides relevant operations to implement the above-mentioned 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. This arrangement of the present invention is typically provided as software, code and / or other data structures arranged or encoded on a computer-readable medium such as an optical medium (e.g., CD-ROM), a floppy disk or a hard disk, or other media such as firmware or microcode on one or more ROM or RAM or PROM chips, or downloadable software images, shared databases, etc. in one or more modules. Software or firmware or this configuration can be installed on a computing device so that one or more processors in the computing device execute the technical solutions described in the embodiments of the present invention.

[0215] In addition, each functional module or each feature of the base station equipment and terminal equipment 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 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, a discrete gate or transistor logic, or a discrete hardware component, or any combination of the above devices. The general-purpose processor may be a microprocessor, or the processor may be an existing processor, a controller, a microcontroller or a state machine. The general-purpose processor or each circuit may be configured by a digital circuit, or may be configured by a logic circuit. In addition, when, due to advances in semiconductor technology, an advanced technology that can replace current integrated circuits emerges, the present invention may also use the integrated circuit obtained using the advanced technology.

[0216] Although the present invention has been described above in conjunction with the preferred embodiments of the present invention, it will be understood by those skilled in the art that various modifications, substitutions, and changes may 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-described embodiments, but should be limited by the appended claims and their equivalents.

Claims

1. A method performed by a user equipment UE, wherein the user equipment UE is a sideline communication user equipment capable of sideline communication, the method comprising: The higher layer requests the sideline communication user equipment to determine a resource subset for transmission of a physical sideline communication shared channel PSSCH / physical sideline communication control channel PSCCH; The sideline communication user equipment determines a candidate resource set S A ;and The sideline communication user equipment selects from the candidate resource set S A Remove one or more candidate resources from the query.

2. The method according to claim 1, wherein: The higher layer selects the sideline communication resources for PSSCH / PSCCH transmission from the resource subset.

3. The method performed by the user equipment UE according to claim 1, wherein: The higher layer requests the sideline communication user equipment to determine a resource subset for PSSCH / PSCCH transmission in time slot n.

4. The method according to claim 1, wherein: The sidewalk communication user equipment is equipped with both an LTE sidewalk communication module and an NR sidewalk communication module.

5. The method performed by the user equipment UE according to claim 1, wherein: The candidate resource set S A Represents the candidate resources in the resource selection window [n+T1, n+T2].

6. The method performed by the user equipment UE according to claim 1, wherein: The user equipment UE receives the S signal from the S signal when the LTE side communication and the NR side communication coexist on the same channel. A Remove one or more candidate resources from the query.

7. The method performed by the user equipment UE according to claim 6, wherein: The user equipment receives the S A Remove one or more candidate resources R x，y , at least the following conditions are met: Condition 1: the resource pool of the NR side communication overlaps with the resource pool of the LTE side communication; Condition 2: The user equipment UE does not monitor the subframe of the LTE sideline communication Condition 3: The user equipment UE is in the subframe A hypothetical LTE side communication SCI is received, and the LTE side communication SCI indicates all sub-channels and PSCCH resources in the LTE side communication resource pool, and all sub-channels and PSCCH resources in the LTE side communication resource pool are consistent with overlap, where j = 0, 1, ..., C resel -1, Said represents the resource reservation period sent by the user equipment UE indicated by the upper layer, the T′ max Indicates the number of time slots in the resource pool within 10240ms.

8. The method performed by the user equipment UE according to claim 6, wherein: The user equipment UE receives the S A Remove one or more candidate resources R x，y , at least the following conditions are met: Condition 1: The user equipment UE has a sidewalk communication scheduling grant selected for LTE sidewalk communication; Condition 2: The resource blocks included in the sideline communication scheduling grant selected in the resource selection window [n+T1, n+T2] and overlap, where j = 0, 1, ..., C resel -1, Said represents the resource reservation period sent by the user equipment UE indicated by the upper layer, the T′ max Indicates the number of time slots in the resource pool within 10240ms; Condition 3: The priority value associated with the selected side communication scheduling permission is lower than the sending priority value of the NR side communication.

9. A user equipment, comprising: processor; as well as A memory storing instructions; Wherein, when the instructions are executed by the processor, the user equipment executes The method according to any one of claims 1 to 8.

Images