Method performed by user equipment and user equipment

Abstract

The present invention provides a method executed by a user equipment and the user equipment, the method comprising: receiving sideline communication scheduling information sent by a base station; determining interval indication information T1 and / or T2 of time domain resources; and determining the value TRIV' of the time domain resource indication field in the sideline communication control information SCI format 0-1.

Description

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] At the 3GPP RAN1#98 meeting in August 2019 (see Non-Patent Document 6), the following conclusions were reached regarding resource reservation and indication for transmission mode 2 in NR sidelink:

[0021] ■ In NR sidelink, at least for transmission mode 2, the maximum number of sidelink communication resources reserved for a single sidelink communication transmission (including the secondary sidelink communication transmission) is [2 or 3 or 4].

[0022] Regardless of whether HARQ retransmission is enabled or disabled in sideline communication, the maximum number of reserved sideline communication resources remains the same. For example, if HARQ retransmission is enabled, the maximum number of sideline communication resources reserved for a single sideline communication transmission is 3. If HARQ retransmission is disabled, the maximum number of sideline communication resources reserved for a single sideline communication transmission is also 3.

[0023] At the 3GPP RAN1#98bis meeting in October 2019 (see Non-Patent Document 7), the following conclusions were reached regarding the maximum number of sideline communication resources reserved for the above-mentioned primary sideline communication transmission:

[0024] ■The maximum number of sidelink communication resources reserved for a sidelink communication transmission is 2 or 3. The value 4 is not supported in NR sidelink.

[0025] ■When the reservation of the initial transmission sideline communication resources of a certain TB through the indication information in the SCI corresponding to another TB is disabled, the maximum number of sideline communication resources reserved for a single sideline communication transmission is 3.

[0026] ■The maximum number of sideline communication resources reserved for a sideline communication transmission is 2 or 3, which is configured in the configuration information of the sideline communication resource pool, or is pre-configured.

[0027] The solution of the present invention mainly includes a method for NR side communication user equipment to determine the time domain resource allocation indication field value in the side communication control information SCI.

[0028] Prior art literature

[0029] Non-patent literature

[0030] Non-Patent Literature 1: RP-140518, Work Item Proposal on LTE Device to Device Proximity Services

[0031] Non-Patent Document 2: RP-142311, Work Item Proposal for Enhanced LTE Device to Device Proximity Services

[0032] Non-Patent Document 3: RP-152293, New WI proposal: Support for V2V services based on LTE sidelink

[0033] Non-Patent Document 4: RP-170798, New WID on 3GPP V2X Phase 2

[0034] Non-Patent Document 5: RP-181480, New SID Proposal: Study on NR V2X

[0035] Non-Patent Document 6: RAN1#98, Chairman notes, section 7.2.4.2.2

[0036] Non-Patent Document 7: RAN1#98bis, Chairman's notes, section 7.2.4.2.2 Summary of the Invention

[0037] 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.

[0038] The method executed by the user equipment in the first aspect of the present invention includes: receiving side communication scheduling information sent by the base station; determining the interval indication information T1 and / or T2 of the time domain resources; and determining the value TRIV' of the time domain resource indication field in the side communication control information SCI format 0-1.

[0039] According to the method performed by the user equipment according to the first aspect of the present invention, the sideline communication scheduling information is the sideline communication control information DCI format 3_0 containing the time domain resource allocation indication field; or the sideline communication scheduling information is the radio resource control RRC signaling or radio resource control RRC element containing the time domain resource allocation indication information.

[0040] According to the method executed by the user equipment according to the first aspect of the present invention, the T1 and / or T2 is determined according to TRIV, where the TRIV is a value of the time domain resource allocation indication field or a value of the time domain resource allocation indication information.

[0041] According to the method performed by the user equipment of the first aspect of the present invention, when TRIV=0, the user equipment sets the TRIV' to 0; when the TRIV is 1≤TRIV≤31, the user equipment sets the TRIV' to the TRIV on the first side communication resource indicated by the side communication scheduling information; and / or the user equipment sets the TRIV' to 0 on the second side communication resource indicated by the side communication scheduling information; when TRIV>31, the user equipment sets the TRIV' to the TRIV on the first side communication resource indicated by the side communication scheduling information; and / or the user equipment sets the TRIV' equal to (T2-T1) on the second side communication resource indicated by the side communication scheduling information; and / or the user equipment sets the TRIV' to 0 on the third side communication resource indicated by the side communication scheduling information.

[0042] According to the first aspect of the present invention, the method executed by the user equipment further comprises, after receiving the sideline communication scheduling information sent by the base station, determining the number N of sideline communication resources indicated by the sideline communication scheduling information.

[0043] According to the method executed by the user equipment according to the first aspect of the present invention, the N is determined according to the TRIV.

[0044] According to the method performed by the user equipment of the first aspect of the present invention, when N=1, the user equipment sets the TRIV' to the TRIV or to 0; when N=2, the user equipment sets the TRIV' to the TRIV on the first side communication resource indicated by the side communication scheduling information; and / or the user equipment sets the TRIV' to 0 on the second side communication resource indicated by the side communication scheduling information; when N=3, the user equipment sets the TRIV' to the TRIV on the first side communication resource indicated by the side communication scheduling information; and / or the user equipment sets the TRIV' equal to (T2-T1) on the second side communication resource indicated by the side communication scheduling information; and / or the user equipment sets the TRIV' to 0 on the third side communication resource indicated by the side communication scheduling information.

[0045] According to the method executed by the user equipment according to the first aspect of the present invention, the RRC signaling or the RRC information element is expressed as SL-ConfiguredGrantConfig.

[0046] A user equipment according to a second aspect of the present invention comprises: a processor; and a memory storing instructions; wherein the instructions, when executed by the processor, execute the method according to the first aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] 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:

[0048] Figure 1 FIG. 1 is a schematic diagram illustrating LTE V2X UE sideline communication. FIG.

[0049] Figure 2 FIG. 1 is a schematic diagram showing a resource allocation method for LTE V2X.

[0050] Figure 3 It is a schematic diagram showing the basic process of the method executed by the user equipment in the first embodiment of the invention.

[0051] Figure 4 It is a schematic diagram showing the basic process of the method executed by the user equipment in the second embodiment of the invention.

[0052] Figure 5 It is a schematic diagram showing the basic process of the method executed by the user equipment in the third embodiment of the invention.

[0053] Figure 6 It is a schematic diagram showing the basic process of the method executed by the user equipment in the fourth embodiment of the invention.

[0054] Figure 7 It is a schematic diagram showing the basic process of the method executed by the user equipment in the fifth embodiment of the invention.

[0055] Figure 8 is a block diagram illustrating a user equipment according to an embodiment of the present invention. DETAILED DESCRIPTION

[0056] 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.

[0057] 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.

[0058] 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.

[0059] 3GPP: 3rd Generation Partnership Project

[0060] LTE: Long Term Evolution

[0061] NR: New Radio, New Wireless, New Air Interface

[0062] PDCCH: Physical Downlink Control Channel, physical downlink control channel

[0063] DCI: Downlink Control Information, downlink control information

[0064] PDSCH: Physical Downlink Shared Channel, physical downlink shared channel

[0065] UE: User Equipment

[0066] eNB: evolved NodeB

[0067] gNB: NR base station

[0068] TTI: Transmission Time Interval, transmission time interval

[0069] OFDM: Orthogonal Frequency Division Multiplexing

[0070] CP-OFDM: Cyclic Prefix Orthogonal Frequency Division Multiplexing, orthogonal frequency division multiplexing with cyclic prefix

[0071] C-RNTI: Cell Radio Network Temporary Identifier, cell radio network temporary identifier

[0072] CSI: Channel State Information

[0073] HARQ: Hybrid Automatic Repeat Request

[0074] CSI-RS: Channel State Information Reference Signal, channel state information reference signal

[0075] CRS: Cell Reference Signal, cell-specific reference signal

[0076] PUCCH: Physical Uplink Control Channel, physical uplink control channel

[0077] PUSCH: Physical Uplink Shared Channel, physical uplink shared channel

[0078] UL-SCH: Uplink Shared Channel, uplink shared channel

[0079] CG: Configured Grant, configured scheduling permission

[0080] Sidelink: Sidelink communication

[0081] SCI: Sidelink Control Information, sidelink communication control information

[0082] PSCCH: Physical Sidelink Control Channel, physical sidelink communication control channel

[0083] MCS: Modulation and Coding Scheme, modulation and coding scheme

[0084] RB: Resource Block

[0085] RE:Resource Element

[0086] CRB: Common Resource Block

[0087] CP: Cyclic Prefix

[0088] PRB: Physical Resource Block, physical resource block

[0089] PSSCH: Physical Sidelink Shared Channel, physical sidelink communication shared channel

[0090] FDM: Frequency Division Multiplexing

[0091] RRC: Radio Resource Control

[0092] RSRP: Reference Signal Receiving Power, reference signal receiving power

[0093] SRS: Sounding Reference Signal, detection reference signal

[0094] DMRS: Demodulation Reference Signal

[0095] CRC: Cyclic Redundancy Check

[0096] PSDCH: Physical Sidelink Discovery Channel, physical sidelink communication discovery channel

[0097] PSBCH: Physical Sidelink Broadcast Channel, physical sidelink communication broadcast channel

[0098] SFI: Slot Format Indication, slot format indication

[0099] TDD: Time Division Duplexing

[0100] FDD: Frequency Division Duplexing

[0101] SIB1: System Information Block Type 1, system information block type 1

[0102] SLSS: Sidelink synchronization Signal, sidelink communication synchronization signal

[0103] PSSS: Primary Sidelink Synchronization Signal, sidelink communication primary synchronization signal

[0104] SSSS: Secondary Sidelink Synchronization Signal, sideline communication auxiliary synchronization signal

[0105] PCI: Physical Cell ID, physical cell identifier

[0106] PSS: Primary Synchronization Signal

[0107] SSS: Secondary Synchronization Signal

[0108] BWP: BandWidth Part, bandwidth fragment / part

[0109] GNSS: Global Navigation Satellite System

[0110] SFN: System Frame Number, system (wireless) frame number

[0111] DFN: Direct Frame Number, direct frame number

[0112] IE: Information Element

[0113] SSB: Synchronization Signal Block, synchronization system information block

[0114] EN-DC: EUTRA-NR Dual Connection, LTE-NR dual connectivity

[0115] MCG: Master Cell Group

[0116] SCG: Secondary Cell Group

[0117] PCell: Primary Cell

[0118] SCell: Secondary Cell

[0119] PSFCH: Physical Sidelink Feedback Channel, physical sidelink communication feedback channel

[0120] SPS: Semi-Persistant Scheduling

[0121] TA: Timing Advance, uplink timing advance

[0122] PT-RS: Phase-Tracking Reference Signals, phase tracking reference signal

[0123] TB: Transport Block

[0124] CB: Code Block, coding block / code block

[0125] QPSK: Quadrature Phase Shift Keying, quadrature phase shift keying

[0126] 16 / 64 / 256QAM: 16 / 64 / 256Quadrature Amplitude Modulation, quadrature amplitude modulation

[0127] AGC: Auto Gain Control, automatic gain control

[0128] TDRA(field): Time Domain Resource Assignment, time domain resource allocation indication (field)

[0129] FDRA(field): Frequency Domain Resource Assignment, frequency domain resource allocation indication (field)

[0130] 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.

[0131] 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.

[0132] 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.

[0133] 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 1st stage SCI or SCI format 0-1, which is transmitted in PSCCH; the second-level SCI is called 2nd stage SCI or SCI format 0-2, which is transmitted in the corresponding PSSCH resources.

[0134] In the description of the present invention It means to perform a sum operation on f(1), f(2), ..., f(m-1).

[0135] In the present invention, the sidelink communication scheduling information transmitted by the base station indicates that the number of sidelink communication time-frequency resources is N. On the i-th (1≤i≤N) sidelink communication resource, if the user equipment transmits the PSCCH and the corresponding PSSCH, the corresponding indication field in the SCI is set according to the method of this patent, such as the time domain resource allocation indication field in SCI format 0-1. It is worth noting that the user equipment may not transmit the PSCCH and the corresponding PSSCH on the sidelink communication resource indicated by a certain base station, and the present invention does not impose any restrictions on this.

[0136] Sidelink communication scenarios

[0137] 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).

[0138] 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).

[0139] 3) Partial-Coverage Sidelink Communication: One of the UEs performing sidelink communication has no network coverage, while the other UE has network coverage.

[0140] 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.

[0141] The basic process of LTE V2X (sidelink) communication

[0142] Figure 1 This is a schematic diagram showing LTE V2X UE sideline communication. First, UE1 sends sideline communication control information (SCI format 1) to UE2, which is carried by the physical layer channel PSCCH. SCI format 1 contains scheduling information of PSSCH, such as the frequency domain resources of PSSCH. Secondly, UE1 sends sideline communication data to UE2, which is carried by the physical layer channel PSSCH. PSCCH and the corresponding PSSCH adopt frequency division multiplexing, that is, PSCCH and the corresponding PSSCH are located in the same subframe in the time domain and in different RBs in the frequency domain. The specific design of PSCCH and PSSCH is as follows:

[0143] 1) The PSCCH occupies one subframe in the time domain and two consecutive RBs in the frequency domain. The scrambling sequence is initialized using a predefined value of 510. The PSCCH can carry SCI format 1, which contains at least the frequency domain resource information of the PSSCH. For example, in the frequency domain resource indication field, SCI format 1 indicates the starting sub-channel number and the number of consecutive sub-channels of the PSSCH corresponding to the PSCCH.

[0144] 2)PSSCH occupies one subframe in the time domain and uses frequency division multiplexing (FDM) with the corresponding PSCCH.PSSCH occupies one or more consecutive sub-channels in the frequency domain. Sub-channel represents n in the frequency domain. subCHsize consecutive RBs, n subCHsizeConfigured by RRC parameters, the starting sub-channel and the number of consecutive sub-channels are indicated by the frequency domain resource indication field of SCI format 1.

[0145] LTE V2X Resource Allocation: Transmission Mode 3 / 4

[0146] Figure 2 Figure 3 shows two resource allocation modes for LTE V2X, namely base station scheduling-based resource allocation (Transmission Mode 3) and UE sensing-based resource allocation (Transmission Mode 4). In NR sideline communications, LTE V2X transmission mode 3 corresponds to NR V2X transmission mode 1, which is a base station scheduling-based transmission mode; LTE V2X transmission mode 4 corresponds to NR V2X transmission mode 2, which is a UE sensing-based transmission mode. In LTE V2X, when there is eNB network coverage, the base station can configure the UE's resource allocation method, or the UE's transmission mode, through UE-level dedicated RRC signaling (SL-V2X-ConfigDedicated), specifically:

[0147] 1) Resource allocation based on base station scheduling (Transmission Mode 3): The resource allocation based on base station scheduling means that the frequency domain resources used for sidelink communication come from the scheduling of the base station. Transmission Mode 3 includes two scheduling modes: dynamic scheduling and semi-persistent scheduling (SPS). For dynamic scheduling, the UL grant (DCI format 5A) includes the frequency domain resources of the PSSCH, and the CRC of the PDCCH or EPDCCH carrying the DCI format 5A is scrambled by the SL-V-RNTI. For SPS semi-persistent scheduling, the base station configures one or more (up to 8) configured scheduling grants (configured grant) through the IE: SPS-ConfigSL-r14. Each configured scheduling grant contains a scheduling grant number (index) and the resource period of the scheduling grant. The UL grant (DCI format 5A) includes the frequency domain resources of the PSSCH, as well as the indication information (3 bits) of the scheduling grant number and the indication information of SPS activation (activation) or release (release, or deactivation). The CRC of the PDCCH or EPDCCH carrying DCI format 5A is scrambled by the SL-SPS-V-RNTI.

[0148] Specifically, when the RRC signaling SL-V2X-ConfigDedicated is set to scheduled-r14, it means that the UE is configured as a transmission mode based on base station scheduling. The base station configures SL-V-RNTI or SL-SPS-V-RNTI through RRC signaling, and sends an uplink scheduling grant UL grant to the UE through PDCCH or EPDCCH (DCI format 5A, CRC is encrypted with SL-V-RNTI or SL-SPS-V-RNTI). The above-mentioned uplink scheduling grant UL grant contains at least the scheduling information of the PSSCH frequency domain resources in the sidelink communication. When the UE successfully monitors the PDCCH or EPDCCH encrypted by SL-V-RNTI or SL-SPS-V-RNTI, the PSSCH frequency domain resource indication field in the uplink scheduling grant UL grant (DCI format 5A) is used as the indication information of the frequency domain resources of the PSSCH in the PSCCH (SCI format 1), and the PSCCH (SCIformat 1) and the corresponding PSSCH are sent.

[0149] For semi-persistent scheduling (SPS) in transmission mode 3, the UE receives DCI format 5A scrambled with SL-SPS-V-RNTI in downlink subframe n. If DCI format 5A contains SPS activation indication information, the UE determines the frequency domain resources of the PSSCH based on the indication information in DCI format 5A and determines the time domain resources of the PSSCH (the subframe in which the PSSCH is transmitted) based on information such as subframe n.

[0150] 2) Resource allocation based on UE sensing (Transmission Mode 4): The resource allocation based on UE sensing means that the resources used for sidelink communication are based on the UE's sensing process of the candidate available resource set. When the RRC signaling SL-V2X-ConfigDedicated is set to ue-Selected-r14, it indicates that the UE is configured for a transmission mode based on UE sensing. In the transmission mode based on UE sensing, the base station configures the available transmission resource pool, and the UE determines the sidelink transmission resources of the PSSCH in the transmission resource pool according to certain rules (for a detailed description of the process, see the LTE V2X UE sensing process section), and sends the PSCCH (SCI format 1) and the corresponding PSSCH.

[0151] Sidelink resource pool

[0152] 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.

[0153] Parameter set (numerology) in NR (including NR sidelink) and time in NR (including NR sidelink) slot

[0154] 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.

[0155] Table 4.2-1 Subcarrier spacing supported by NR

[0156] μ <![CDATA[Δf=2 μ ·15[kHz]]]> CP (Cyclic Prefix) 0 15 normal 1 30 normal 2 60 Normal, Extended 3 120 normal 4 240 normal

[0157] 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.

[0158] 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.

[0159] 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

[0160]

[0161] 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)

[0162]

[0163] 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.

[0164] LTE (including LTE V2X) parameter sets and LTE (including LTE V2X) slots and subframes

[0165] 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.

[0166] 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.

[0167] Resource blocks RB and resource elements RE

[0168] 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.

[0169] The maximum number of sideline communication resources reserved for a sideline communication transmission

[0170] In the specification of this patent, the maximum number of sideline communication resources reserved for a sideline communication transmission represents the maximum number of sideline communication resources indicated in the current sideline communication transmission (using N max The maximum number of sideline communication resources includes the current sideline communication resources. max=3, in a certain sideline communication transmission, an additional time-frequency resource of up to two sideline communications can be indicated by SCI, that is, an additional time-frequency resource of one sideline communication, or two time-frequency resources of sideline communication, or no additional time-frequency resource of sideline communication is indicated in SCI. max , there are still the following instructions:

[0171] ■The maximum number of sideline communication resources reserved for a sideline communication transmission is 2 or 3, that is, N max =2,3.

[0172] ■When the initial transmission sideline communication resource reservation of a TB is disabled by the indication information in the SCI corresponding to another TB, the maximum number of sideline communication resources N reserved for a sideline communication transmission is max is 3.

[0173] ■N max =2 or 3 is configured in the configuration information of the sideline communication resource pool, or pre-configured.

[0174] NR sideline communication DCI format (format) 3 0 and the time domain resource indication field in SCI format 0-1 interpretation

[0175] In NR sideline communication, DCI format 3_0 is used to schedule PSCCH and PSSCH for transmission mode 1. SCI format 0-1 is used to schedule PSSCH and the second-level SCI carried on PSSCH. In both DCI format 3_0 and SCI format 0-1, a time domain resource indication field (or field) is included. In addition, the interpretation of the time domain resource indication field in DCI format 3_0 and SCI format 0-1 is the same, as shown below (the value of the time domain resource indication field is expressed as TRIV):

[0176] ■If N=1,

[0177] Then, TRIV = 0;

[0178] ■ Otherwise, if N=2,

[0179] Then, TRIV = T1;

[0180] Otherwise

[0181] If (T2-T1-1)≤15

[0182] Then, TRIV = 30(T2-T1-1)+T1+31;

[0183] ·otherwise,

[0184] ○Then, TRIV=30(31-T2+T1)+62-T1.

[0185] Where N represents the number of resources actually indicated for sideline communication, satisfying N≤N max .

[0186] Wherein, T1 represents the time domain offset of the additional first sideline communication resource, T2 represents the time domain offset of the additional second sideline communication resource, and they satisfy:

[0187] ■For N=2, 1≤T1≤31;

[0188] ■For N=3, 1≤T1≤30, T1<T2≤31.

[0189] The above-mentioned interpretation of the time domain resource indication field is a one-to-one mapping method. That is, when the user equipment receives DCI format 3_0 or SCI format 0-1, based on the value TRIV of the time domain resource indication field, combined with the calculation and mapping relationship between TRIV and T1 and T2, a unique T1 (equivalent to determining N=2) or a unique set (T1, T2) (equivalent to determining N=3) can be determined, or N=1 (indicating no additional sidelink communication resource indication, only the current resource indication). It is worth noting that for N=1, TRIV=0; for N=2, 1≤TRIV≤31; for N=3, TRIV>31.

[0190] NR side communication DCI format (format) 3 0 and SCI format (format) 0-1 in the frequency domain resource indication field interpretation

[0191] For NR sideline communication, similar to LTE V2X, the allocation of frequency domain resources is based on subchannels. A subchannel contains multiple RBs, and the allocation of frequency domain resources is an integer number of subchannels.

[0192] Both DCI format 3_0 and SCI format 0-1 contain a frequency domain resource indication field (or field). Furthermore, the interpretation of the frequency domain resource indication field in DCI format 3_0 and SCI format 0-1 is the same, as shown below (the value of the frequency domain resource indication field is represented by r):

[0193] ■For N max =2,

[0194] ·but,

[0195] ■For N max =3,

[0196] ·but,

[0197]

[0198] in,

[0199] ■ Indicates the number of (pre-)configured subchannels in the resource pool configuration information;

[0200] ■f2 represents the index (or number) of the lowest subchannel of the second sideline communication resource;

[0201] ■f3 represents the index (or number) of the lowest subchannel of the third sideline communication resource;

[0202] ■m represents the number of subchannels allocated in the frequency domain.

[0203] When the user equipment determines N max After taking the value, the UE can determine a unique set of f2 and m, or a unique set of f2, f3 and m, based on the value r of the frequency domain resource indication field in the received DCI format 3_0 or SCI format 0-1, combined with the above calculation method for determining r.

[0204] The difference between the interpretation of the frequency domain resource indication field and the interpretation of the time domain resource indication field

[0205] The differences between the frequency domain resource allocation indication FDRA and the time domain resource allocation indication TDRA in NR sideline communication mainly include the following two points:

[0206] ■ Based on the TDRA indication, the UE obtains the interval indication information in the time domain; based on the FDRA indication, the UE obtains the index (or number) of the starting (or lowest) subcarrier in the frequency domain and the number of allocated subchannels in the frequency domain;

[0207] ■ The method for determining the value r of FDRA (and the method for determining f2, f3 and m based on r) includes N max (Pre) configuration information.

[0208] 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.

[0209] [Example 1]

[0210] Figure 3 It is a schematic diagram showing the basic process of the method executed by the user equipment according to the first embodiment of the present invention.

[0211] Next, combine Figure 3The basic process diagram shown is used to describe in detail the method executed by the user equipment according to the first embodiment of the present invention.

[0212] like Figure 3 As shown, in the first embodiment of the present invention, the steps performed by the user equipment include:

[0213] In step S101, the sidewalk communication user equipment receives sidewalk communication scheduling information sent by the base station.

[0214] Optionally, the sideline communication scheduling information is a DCI format 3_0 including a time domain resource allocation indication field.

[0215] or,

[0216] Optionally, the sidelink communication scheduling information is RRC signaling (or, RRC information element) containing time domain resource allocation indication information; the RRC signaling (or, RRC information element) is expressed as SL-ConfiguredGrantConfig.

[0217] In step S102, the sideline communication user equipment determines the number N of sideline communication resources indicated by the sideline communication scheduling information.

[0218] Optionally, the user equipment determines N according to a value TRIV of the time domain resource allocation indication field, or,

[0219] Optionally, the user equipment determines the N according to a value TRIV of the time domain resource allocation indication information.

[0220] In step S103, the sideline communication user equipment determines interval indication information T1 and / or T2 of time domain resources.

[0221] Optionally, the user equipment determines T1 and / or T2 according to a value TRIV of the time domain resource allocation indication field, or,

[0222] Optionally, the user equipment determines T1 and / or T2 according to a value TRIV of the time domain resource allocation indication information.

[0223] In step S104, the user equipment determines the value TRIV' of the time domain resource indication field in the SCI format 0-1.

[0224] Optionally, if N=1, the user equipment sets the value TRIV' of the time domain resource indication field in the SCI format 0-1 to the TRIV, or to 0;

[0225] Alternatively, if N=2,

[0226] ■ Optionally, the user equipment sets the value TRIV' of the time domain resource indication field in the SCI format 0-1 to the TRIV on the first sidelink communication resource indicated by the sidelink communication scheduling information;

[0227] ■ Optionally, the user equipment sets the value TRIV' of the time domain resource indication field in the SCI format 0-1 to 0 on the second sidelink communication resource indicated by the sidelink communication scheduling information;

[0228] Alternatively, if N=3,

[0229] ■ Optionally, the user equipment sets the value TRIV' of the time domain resource indication field in the SCI format 0-1 to the TRIV on the first sidelink communication resource indicated by the sidelink communication scheduling information;

[0230] ■ Optionally, the user equipment sets the value TRIV' of the time domain resource indication field in the SCI format 0-1 to be equal to (T2-T1) on the second sidelink communication resource indicated by the sidelink communication scheduling information;

[0231] ■ Optionally, the user equipment sets the value TRIV' of the time domain resource indication field in the SCI format 0-1 to 0 on the third sidelink communication resource indicated by the sidelink communication scheduling information.

[0232] [Example 2]

[0233] Figure 4 It is a schematic diagram showing the basic process of the method executed by the user equipment according to the second embodiment of the present invention.

[0234] Next, combine Figure 4 The basic process diagram shown is used to describe in detail the method executed by the user equipment according to the second embodiment of the present invention.

[0235] like Figure 4 As shown, in the second embodiment of the present invention, the steps performed by the user equipment include:

[0236] In step S201, the sidewalk communication user equipment receives sidewalk communication scheduling information sent by the base station.

[0237] Optionally, the sideline communication scheduling information is a DCI format 3_0 including a time domain resource allocation indication field.

[0238] or,

[0239] Optionally, the sidelink communication scheduling information is RRC signaling (or, RRC information element) containing time domain resource allocation indication information; the RRC signaling (or, RRC information element) is expressed as SL-ConfiguredGrantConfig.

[0240] In step S202, the sideline communication user equipment determines interval indication information T1 and / or T2 of time domain resources.

[0241] Optionally, the user equipment determines T1 and / or T2 according to a value TRIV of the time domain resource allocation indication field, or,

[0242] Optionally, the user equipment determines T1 and / or T2 according to a value TRIV of the time domain resource allocation indication information.

[0243] In step S203, the user equipment determines the value TRIV' of the time domain resource indication field in the SCI format 0-1.

[0244] Optionally, if TRIV=0, the user equipment sets the value TRIV' of the time domain resource indication field in the SCI format 0-1 to 0;

[0245] Alternatively, if 1≤TRIV≤31,

[0246] ■ Optionally, the user device sets the value TRIV' of the time domain resource indication field in the SCI format 0-1 to the TRIV on the first sidelink communication resource indicated by the sidelink communication scheduling information;

[0247] ■ Optionally, the user equipment sets the value TRIV' of the time domain resource indication field in the SCI format 0-1 to 0 on the second sidelink communication resource indicated by the sidelink communication scheduling information;

[0248] Alternatively, if TRIV>31,

[0249] ■ Optionally, the user equipment sets the value TRIV' of the time domain resource indication field in the SCI format 0-1 to the TRIV on the first sidelink communication resource indicated by the sidelink communication scheduling information;

[0250] ■ Optionally, the user equipment sets the value TRIV' of the time domain resource indication field in the SCI format 0-1 to be equal to (T2-T1) on the second sidelink communication resource indicated by the sidelink communication scheduling information;

[0251] ■ Optionally, the user equipment sets the value TRIV' of the time domain resource indication field in the SCI format 0-1 to 0 on the third sidelink communication resource indicated by the sidelink communication scheduling information.

[0252] [Example 3]

[0253] Figure 5 It is a schematic diagram showing the basic process of the method executed by the user equipment according to the third embodiment of the present invention.

[0254] Next, combine Figure 5 The basic process diagram shown is used to describe in detail the method executed by the user equipment in embodiment 3 of the present invention.

[0255] like Figure 5 As shown, in the third embodiment of the present invention, the steps performed by the user equipment include:

[0256] In step S301, the sideline communication user equipment determines the maximum number N of sideline communication resources reserved for a sideline communication transmission. max .

[0257] Optionally, the user equipment determines the maximum number N of sideline communication resources reserved for the primary sideline communication transmission according to the configuration information of the sideline communication resource pool. max .

[0258] In step S302, the sidewalk communication user equipment receives sidewalk communication scheduling information sent by the base station.

[0259] Optionally, the sidelink communication scheduling information is a DCI format 3_0 including a frequency domain resource allocation indication field and a time domain resource allocation indication field.

[0260] or,

[0261] Optionally, the sidelink communication scheduling information is RRC signaling (or, RRC information element) including frequency domain resource allocation indication information and time domain resource allocation indication information; the RRC signaling (or, RRC information element) is expressed as SL-ConfiguredGrantConfig.

[0262] In step S303, the sideline communication user equipment determines the index (or number) f2 of the lowest subchannel of the second sideline communication resource, the number m of subchannels allocated to the sideline communication frequency domain resource, and / or the index f3 of the lowest subchannel of the third sideline communication resource.

[0263] Optionally, the user equipment determines f2, m, and / or f3 according to the value r of the frequency domain resource allocation indication field, or,

[0264] Optionally, the user equipment determines f2, m, and / or f3 according to a value r of the frequency domain resource allocation indication information.

[0265] In step S304, the sideline communication user equipment determines the number N of sideline communication resources indicated by the sideline communication scheduling information.

[0266] Optionally, the user equipment determines N according to a value TRIV of the time domain resource allocation indication field, or,

[0267] Optionally, the user equipment determines the N according to a value TRIV of the time domain resource allocation indication information.

[0268] In step S305, the user equipment determines a value r' of the frequency domain resource indication field in the SCI format 0-1.

[0269] Optionally, if N=1, the user equipment sets the value r' of the frequency domain resource indication field in the SCI format 0-1 to be equal to r;

[0270] Alternatively, if N=2,

[0271] ■ Optionally, the user equipment sets the value r' of the frequency domain resource indication field in the SCI format 0-1 to be equal to r on the first sidelink communication resource indicated by the sidelink communication scheduling information;

[0272] ■ Optionally, the user equipment uses the second sideline communication resource indicated by the sideline communication scheduling information,

[0273] ○ If the N max =2, then the user equipment sets the value r' of the frequency domain resource indication field in the SCI format 0-1 to be equal to r, or the user equipment sets the value of the frequency domain resource indication field in the SCI format 0-1 to be equal to r

[0274] ■wherein f2′ is fixed to a non-negative integer value (optionally 0), or is predefined, or is randomly selected by the user equipment, or depends on the specific implementation of the UE;

[0275] ■ Indicates the number of (pre-)configured sub-channels in the resource pool configuration information.

[0276] ○ If the N max=3, then the user equipment sets the value r' of the frequency domain resource indication field in the SCI format 0-1 to be equal to r, or the user equipment sets the value of the frequency domain resource indication field in the SCI format 0-1 to be equal to r

[0277] ■wherein f2′ and f3′ are fixed to a non-negative integer value (optionally 0), or are predefined, or are randomly selected by the user equipment, or depend on the specific implementation of the UE;

[0278] ■ Indicates the number of (pre-)configured sub-channels in the resource pool configuration information.

[0279] Alternatively, if N=3,

[0280] ■ Optionally, the user equipment sets the value r' of the frequency domain resource indication field in the SCI format 0-1 to be equal to r on the first sidelink communication resource indicated by the sidelink communication scheduling information;

[0281] ■ Optionally, the user equipment sets the value of the frequency domain resource indication field in the SCI format 0-1 on the second sidelink communication resource indicated by the sidelink communication scheduling information.

[0282] ■wherein f2′=f3, and f3′ is fixed to a non-negative integer value (optionally, 0), or is predefined, or is randomly selected by the user equipment, or depends on the specific implementation of the UE;

[0283] ■ Indicates the number of (pre-)configured sub-channels in the resource pool configuration information.

[0284] ■ Optionally, on the third sideline communication resource indicated by the sideline communication scheduling information, the user equipment sets the value r' of the frequency domain resource indication field in the SCI format 0-1 to be equal to r, or the user equipment sets the value r' of the frequency domain resource indication field in the SCI format 0-1 to be equal to r

[0285] ■wherein f2′ and f3′ are fixed to a non-negative integer value (optionally 0), or are predefined, or are randomly selected by the user equipment, or depend on the specific implementation of the UE;

[0286] ■ Indicates the number of (pre-)configured sub-channels in the resource pool configuration information.

[0287] [Example 4]

[0288] Figure 6 It is a schematic diagram showing the basic process of the method executed by the user equipment according to the fourth embodiment of the present invention.

[0289] Next, combine Figure 6 The basic process diagram shown is used to describe in detail the method executed by the user equipment according to the fourth embodiment of the present invention.

[0290] like Figure 6 As shown, in the fourth embodiment of the present invention, the steps performed by the user equipment include:

[0291] In step S401, the sideline communication user equipment determines the maximum number N of sideline communication resources reserved for a sideline communication transmission. max .

[0292] Optionally, the user equipment determines the maximum number N of sideline communication resources reserved for the primary sideline communication transmission according to the configuration information of the sideline communication resource pool. max .

[0293] In step S402, the sidewalk communication user equipment receives sidewalk communication scheduling information sent by the base station.

[0294] Optionally, the sidelink communication scheduling information is a DCI format 3_0 including a frequency domain resource allocation indication field and a time domain resource allocation indication field.

[0295] or,

[0296] Optionally, the sidelink communication scheduling information is RRC signaling (or, RRC information element) including frequency domain resource allocation indication information and time domain resource allocation indication information; the RRC signaling (or, RRC information element) is expressed as SL-ConfiguredGrantConfig.

[0297] In step S403, the sideline communication user equipment determines the index (or number) f2 of the lowest subchannel of the second sideline communication resource, the number m of subchannels allocated to the sideline communication frequency domain resource, and / or the index f3 of the lowest subchannel of the third sideline communication resource.

[0298] Optionally, the user equipment determines f2, m, and / or f3 according to the value r of the frequency domain resource allocation indication field, or,

[0299] Optionally, the user equipment determines f2, m, and / or f3 according to a value r of the frequency domain resource allocation indication information.

[0300] In step S404, the user equipment determines a value r' of the frequency domain resource indication field in the SCI format 0-1.

[0301] Optionally, if the value TRIV of the time domain resource allocation indication field or indication information is 0, the user equipment sets the value r' of the frequency domain resource indication field in the SCI format 0-1 to be equal to r;

[0302] Optionally, if the value of the time domain resource allocation indication field or indication information is 1≤TRIV≤31,

[0303] ■ Optionally, the user equipment sets the value r' of the frequency domain resource indication field in the SCI format 0-1 to be equal to r on the first sidelink communication resource indicated by the sidelink communication scheduling information;

[0304] ■ Optionally, the user equipment uses the second sideline communication resource indicated by the sideline communication scheduling information,

[0305] ○ If the N max =2, then the user equipment sets the value r' of the frequency domain resource indication field in the SCI format 0-1 to be equal to r, or the user equipment sets the value of the frequency domain resource indication field in the SCI format 0-1 to be equal to r

[0306] ■wherein f2′ is fixed to a non-negative integer value (optionally 0), or is predefined, or is randomly selected by the user equipment, or depends on the specific implementation of the UE;

[0307] ■ Indicates the number of (pre-)configured sub-channels in the resource pool configuration information.

[0308] ○ If the N max=3, then the user equipment sets the value r' of the frequency domain resource indication field in the SCI format 0-1 to be equal to r, or the user equipment sets the value of the frequency domain resource indication field in the SCI format 0-1 to be equal to r

[0309] ■wherein f2′ and f3′ are fixed to a non-negative integer value (optionally 0), or are predefined, or are randomly selected by the user equipment, or depend on the specific implementation of the UE;

[0310] ■ Indicates the number of (pre-)configured sub-channels in the resource pool configuration information.

[0311] Optionally, if the value TRIV of the time domain resource allocation indication field or indication information is greater than 31,

[0312] ■ Optionally, the user equipment sets the value r' of the frequency domain resource indication field in the SCI format 0-1 to be equal to r on the first sidelink communication resource indicated by the sidelink communication scheduling information;

[0313] ■ Optionally, the user equipment sets the value of the frequency domain resource indication field in the SCI format 0-1 on the second sidelink communication resource indicated by the sidelink communication scheduling information.

[0314] ■wherein f2′=f3, and f3′ is fixed to a non-negative integer value (optionally, 0), or is predefined, or is randomly selected by the user equipment, or depends on the specific implementation of the UE;

[0315] ■ Indicates the number of (pre-)configured sub-channels in the resource pool configuration information.

[0316] ■ Optionally, on the third sideline communication resource indicated by the sideline communication scheduling information, the user equipment sets the value r' of the frequency domain resource indication field in the SCI format 0-1 to be equal to r, or the user equipment sets the value r' of the frequency domain resource indication field in the SCI format 0-1 to be equal to r

[0317] ■wherein f2′ and f3′ are fixed to a non-negative integer value (optionally 0), or are predefined, or are randomly selected by the user equipment, or depend on the specific implementation of the UE;

[0318] ■ Indicates the number of (pre-)configured sub-channels in the resource pool configuration information.

[0319] [Example 5]

[0320] Figure 7 It is a schematic diagram showing the basic process of the method executed by the user equipment according to the fifth embodiment of the present invention.

[0321] Next, combine Figure 7 The basic process diagram shown is used to describe in detail the method executed by the user equipment in embodiment 5 of the present invention.

[0322] like Figure 7 As shown, in the fifth embodiment of the present invention, the steps performed by the user equipment include:

[0323] In step S501, the sideline communication user equipment determines the maximum number N of sideline communication resources reserved for a sideline communication transmission. max .

[0324] Optionally, the user equipment determines the maximum number N of sideline communication resources reserved for the primary sideline communication transmission according to the configuration information of the sideline communication resource pool. max .

[0325] In step S502, the sidewalk communication user equipment receives the sidewalk communication scheduling information sent by the base station.

[0326] Optionally, the sidelink communication scheduling information is a DCI format 3_0 including a time domain resource allocation indication field and a frequency domain resource allocation indication field.

[0327] or,

[0328] Optionally, the sidelink communication scheduling information is RRC signaling (or, RRC information element) including time domain resource allocation indication information and frequency domain resource allocation indication information; the RRC signaling (or, RRC information element) is expressed as SL-ConfiguredGrantConfig.

[0329] Optionally, in step S503 (step S503 is an optional step), the sideline communication user equipment determines the number N of sideline communication time-frequency resources indicated by the sideline communication scheduling information.

[0330] Optionally, the user equipment determines N according to a value TRIV of the time domain resource allocation indication field, or,

[0331] Optionally, the user equipment determines the N according to a value TRIV of the time domain resource allocation indication information.

[0332] In step S504, the user equipment determines the time domain resource indication field and / or the frequency domain resource indication field in the SCI format 0-1.

[0333] Optionally, the user equipment sets the time domain resource indication field and / or the frequency domain resource indication field in the SCI format 0-1 so that (such that) (or, satisfies) the side communication time-frequency resources indicated in the SCI format 0-1 are consistent with (in accordance with) the side communication time-frequency resources indicated by the side communication scheduling information, and / or,

[0334] Optionally, assuming that the time-frequency resource of the sideline communication transmission corresponding to the SCI format 0-1 is the i-th (1≤i≤N) sideline communication time-frequency resource indicated by the sideline communication scheduling information, the user equipment sets the time domain resource indication field and / or the frequency domain resource indication field in the SCI format 0-1 in a manner of indicating the i-th, i+1-th, ..., N-th (a total of N-i+1) (or, i+1-th, ..., N-th, a total of Ni) sideline communication time-frequency resources, or the user equipment sets the time domain resource indication field and / or the frequency domain resource indication field in the SCI format 0-1 so that the time domain resource indication information and / or frequency domain resource indication information contained in the SCI format 0-1 indicates (the) i-th, i+1-th, ..., N-th (a total of N-i+1) (or, i+1-th, ..., N-th, a total of Ni) sideline communication time-frequency resources, and / or,

[0335] Alternatively, if N-i+1<N max (Or, if the number of the sideline communication time-frequency resources indicated by the SCI format 0-1 is less than N max ), then, when the user equipment determines the frequency domain resource indication field in the SCI format 0-1, for the (N max -(N-i+1)) lowest subchannel index (or number), which depends on UE implementation, or is fixed to 0 (or other non-negative integer value), or is randomly selected by the user equipment. Specifically, if N max-(N-i+1)=1 and N max =2, then the one lowest subchannel index f2 depends on the UE implementation, or is fixed to a certain integer, or is randomly selected by the user equipment, or the user equipment determines that the frequency domain resource indication field in the SCI format 0-1 is equal to the frequency domain resource indication field or the value of the indication information in the sideline communication scheduling information; and if N max -(N-i+1)=1 and N max =3, then the one lowest subchannel index f3 depends on the UE implementation, or is fixed to a certain integer, or is randomly selected by the user equipment; and if N max -(N-i+1)=2 and N max =3, then the two lowest subchannel indices f2 and f3 depend on the UE implementation, or are fixed to a certain integer, or are randomly selected by the user equipment, or the user equipment determines that the frequency domain resource indication field in the SCI format 0-1 is equal to the frequency domain resource indication field in the sideline communication scheduling information or the value of the indication information.

[0336] Figure 8 1 is a block diagram showing a user equipment UE involved in the present invention. Figure 8 As shown, the user equipment UE80 includes a processor 801 and a memory 802. The processor 801 may include, for example, a microprocessor, a microcontroller, an embedded processor, etc. The memory 802 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 memory. The memory 802 stores program instructions. When executed by the processor 801, the instructions may execute the above-described method performed by the user equipment as described in detail in the present invention.

[0337] 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.

[0338] 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.

[0339] 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.

[0340] 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.

[0341] 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.

[0342] 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 user equipment, comprising: A processor; And A memory for storing instructions, Wherein, the processor executes the instructions to: Receive sidelink communication scheduling information via a downlink control information DCI format 3_0, wherein the time domain resource allocation in the sidelink communication scheduling information indicates the number N of multiple sidelink communication resources, Determine the value of the time domain resource allocation indication field of sidelink communication control information SCI, wherein When the sidelink communication transmission resource corresponding to the SCI is the first sidelink communication resource among the multiple sidelink communication resources, the value of the time domain resource allocation indication field in the SCI indicates all the resources among the multiple sidelink communication resources; and When the sidelink communication transmission resource corresponding to the SCI is the i-th sidelink communication resource among the multiple sidelink communication resources, where 1 < i ≤ N, then the value of the time domain resource allocation indication field in the SCI indicates the i-th to the N-th sidelink communication resources among the multiple sidelink communication resources, Transmit a physical sidelink communication control channel PSCCH having the SCI.

2. A method performed by a user equipment, comprising: Receive sidelink communication scheduling information via a downlink control information DCI format 3_0, wherein the time domain resource allocation in the sidelink communication scheduling information indicates the number N of multiple sidelink communication resources, Determine the value of the time domain resource allocation indication field of sidelink communication control information SCI, wherein When the sidelink communication transmission resource corresponding to the SCI is the first sidelink communication resource among the multiple sidelink communication resources, the value of the time domain resource allocation indication field in the SCI indicates all the resources among the multiple sidelink communication resources; and When the sidelink communication transmission resource corresponding to the SCI is the i-th sidelink communication resource among the multiple sidelink communication resources, where 1 < i ≤ N, then the value of the time domain resource allocation indication field in the SCI indicates the i-th to the N-th sidelink communication resources among the multiple sidelink communication resources, Transmit a physical sidelink communication control channel PSCCH having the SCI.

Images