WO2023131074A1 - Procédé exécuté par un équipement utilisateur et équipement utilisateur - Google Patents

Procédé exécuté par un équipement utilisateur et équipement utilisateur Download PDF

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Publication number
WO2023131074A1
WO2023131074A1 PCT/CN2022/143993 CN2022143993W WO2023131074A1 WO 2023131074 A1 WO2023131074 A1 WO 2023131074A1 CN 2022143993 W CN2022143993 W CN 2022143993W WO 2023131074 A1 WO2023131074 A1 WO 2023131074A1
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Prior art keywords
user equipment
sidelink communication
resource
frequency resource
transmission
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PCT/CN2022/143993
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English (en)
Chinese (zh)
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赵毅男
罗超
刘仁茂
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夏普株式会社
赵毅男
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Publication of WO2023131074A1 publication Critical patent/WO2023131074A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H04W72/542—Allocation or scheduling criteria for wireless resources based on quality criteria using measured or perceived quality
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/28—Discontinuous transmission [DTX]; Discontinuous reception [DRX]

Definitions

  • the present invention relates to the technical field of wireless communication, and in particular to a method executed by user equipment and corresponding user equipment.
  • D2D communication (Device-to-Device communication, device-to-device direct communication) refers to a direct communication method between two user equipments without being forwarded by a base station or a core network.
  • 3GPP 3rd Generation Partnership Project
  • the upper layer supports unicast (Unicast) and multicast (Groupcast) communication functions.
  • V2X stands for Vehicle to everything. It hopes to realize the interaction between the vehicle and all entity information that may affect the vehicle. The purpose is to reduce accidents, slow down traffic congestion, reduce environmental pollution and provide other information services.
  • V2X application scenarios mainly include four aspects:
  • V2V Vehicle to Vehicle, that is, vehicle-to-vehicle communication
  • V2P Vehicle to Pedestrian, that is, the vehicle sends warnings to pedestrians or non-motorized vehicles
  • V2N Vehicle to Network, that is, the vehicle is connected to the mobile network
  • V2I Vehicle to Infrastructure, that is, communication between vehicles and road infrastructure.
  • V2X stage 1 introduces a new D2D communication interface called PC5 interface.
  • the PC5 interface is mainly used to solve the communication problem of cellular vehicle networking under the environment of high speed (up to 250 km/h) and high node density. Vehicles can exchange information such as position, speed and direction through the PC5 interface, that is, direct communication between vehicles can be performed through the PC5 interface.
  • the functions introduced by LTE Release 14 V2X mainly include:
  • the second phase of the V2X research subject belongs to the research category 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 research on transmit diversity.
  • resource allocation mode 2 (resource allocation mode 2) based on user equipment sensing (sensing), or transmission mode 2, is supported.
  • resource allocation mode 2 the physical layer of the user equipment senses the transmission resources in the resource pool, and reports the set of available transmission resources to the upper layer. After the upper layer obtains the report of the physical layer, it performs resource selection or resource re-selection.
  • the enhancement of sidewalk communication includes the following three aspects:
  • Standardize resource allocation methods for reducing power saving of sidelink communication user equipment including but not limited to: resource allocation methods based on partial sensing and resource allocation methods based on random resource selection;
  • SL Discontinuous Reception Standardized sideline communication discontinuous reception (SL Discontinuous Reception, SL DRX for short) mechanism.
  • user equipment supports receiving the physical downlink control channel PDCCH discontinuously in time, called DRX, which can effectively reduce the power consumption of communication equipment.
  • discontinuous reception refers to receiving the physical sidelink communication control channel PSCCH in a part of the time domain, and this time is called the active period (Active time); the time when the PSCCH is not received is called Inactive period (In-active time).
  • the solution of this patent includes a method for sidelink communication user equipment to trigger resource selection or resource reselection when the user equipment is configured with SL DRX.
  • Non-Patent Document 1 RP-140518, Work item proposal on LTE Device to Device Proximity Services
  • Non-Patent Document 2 RP-142311, Work Item Proposal for Enhanced LTE Device to Device Proximity Services
  • Non-Patent Document 3 RP-152293, New WI proposal: Support for V2V services based on LTE sidelink
  • Non-Patent Document 4 RP-170798, New WID on 3GPP V2X Phase 2
  • Non-Patent Document 5 RP-181480, New SID Proposal: Study on NR V2X
  • Non-Patent Document 6 RP-202846, WID revision: NR sidelink enhancement
  • the present invention provides a method executed by user equipment and the user equipment.
  • the method performed by the user equipment according to the first aspect of the present invention includes: selecting and generating a selected sidelink communication scheduling grant; performing transmission resource selection or reselection; and determining the earliest transmission opportunity in the time domain among all selected or reselected transmission opportunities
  • the transmission opportunity of is an initial transmission opportunity, and the other transmission opportunities are retransmission transmission opportunities.
  • side communication data is available on the logical channel.
  • the one selected sidelink communication scheduling grant corresponds to the transmission of multiple or one medium access control layer protocol data unit MAC PDU.
  • the resource selection or reselection is checked to trigger the resource selection or reselection, then the resource selection or reselection is sent.
  • the resource allocation method of the user equipment is: a resource allocation method based on perception; or a resource allocation method based on partial perception; or random resource selection.
  • the user equipment selects the first sidelink communication time-frequency resource for one transmission opportunity; and/or if one or more HARQ retransmissions are selected, the user equipment selects the one or multiple transmission opportunities Selecting a second sidelink communication time-frequency resource from available sidelink communication resources.
  • the user equipment selects the first sidelink for the one transmission opportunity at least according to the time-frequency resource of the first sidelink communication within the active period of SLDRX communication time-frequency resource; and/or the user equipment selects the second sidelink communication time-frequency resource, at least making the selected second sidelink communication time-frequency resource and/or the first sidelink communication time
  • the earliest resource in the time domain among the frequency resources is within the active period of the SL DRX.
  • the user equipment if the user equipment does not select HARQ retransmission, at least according to the time-frequency resource of the first sidelink communication within the active period of SLDRX, for the one transmission Opportunity to select the first sidelink communication time-frequency resource; and/or the user equipment selects the second sidelink communication time-frequency resource, at least making the selected second sidelink communication time-frequency resource and/or The earliest resource in the time domain among the first sidelink communication time-frequency resources is within the active period of the SL DRX.
  • the user equipment selects the first sidelink for the one transmission opportunity at least according to the time-frequency resource of the first sidelink communication within the active period of SLDRX Communication time-frequency resources; and/or the user equipment selects the second sideline communication time-frequency resources, at least making the selected second sideline communication time-frequency resources located in the first sideline in the time domain After the communication time-frequency resource.
  • the user equipment includes: a processor; and a memory storing instructions; wherein the instructions execute the method according to the above first aspect when executed by the processor.
  • NR sidelink communication enhancement for a target (Destination) user equipment configured with sidelink communication discontinuous reception SL DRX, when the sending user equipment selects sidelink communication resources for sidelink communication transmission to the target user equipment, the method of the present invention ensures that the initial transmission resource of the transmission is within the active period of the SLDRX of the target user equipment, so that the target user equipment can effectively receive the sidelink communication transmission, improving the reliability of the sidelink communication; at the same time, The energy consumption of the target user equipment can be reduced.
  • Fig. 1 is a schematic diagram showing LTE V2X UE sidelink communication.
  • FIG. 2 is a schematic diagram showing a resource allocation method of LTE V2X.
  • Fig. 3 is a schematic diagram showing the basic process of the method executed by the user equipment in Embodiments 1, 2 and 3 of the invention.
  • FIG. 4 is a block diagram illustrating a user equipment according to an embodiment of the present invention.
  • 3GPP 3rd Generation Partnership Project
  • the third generation partnership project the third generation partnership project
  • LTE Long Term Evolution, long-term evolution technology
  • PDCCH Physical Downlink Control Channel, physical downlink control channel
  • DCI Downlink Control Information, downlink control information
  • PDSCH Physical Downlink Shared Channel, physical downlink shared channel
  • UE User Equipment, user equipment
  • eNB evolved NodeB, evolved base station
  • gNB NR base station
  • TTI Transmission Time Interval, transmission time interval
  • OFDM Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing
  • CP-OFDM Cyclic Prefix Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing with cyclic prefix
  • C-RNTI Cell Radio Network Temporary Identifier, cell radio network temporary identifier
  • CSI Channel State Information, channel state information
  • CSI-RS Channel State Information Reference Signal, channel state information reference signal
  • CRS Cell Reference Signal, cell-specific reference signal
  • PUCCH Physical Uplink Control Channel, physical uplink control channel
  • PUSCH Physical Uplink Shared Channel, physical uplink shared channel
  • UL-SCH Uplink Shared Channel, uplink shared channel
  • SCI Sidelink Control Information, side communication control information
  • PSCCH Physical Sidelink Control Channel, physical sidelink communication control channel
  • MCS Modulation and Coding Scheme
  • RB Resource Block, resource block
  • CRB Common Resource Block, public resource block
  • CP Cyclic Prefix, cyclic prefix
  • PRB Physical Resource Block, physical resource block
  • PSSCH Physical Sidelink Shared Channel, physical sidelink shared channel
  • FDM Frequency Division Multiplexing, Frequency Division Multiplexing
  • RRC Radio Resource Control, radio resource control
  • RSRP Reference Signal Receiving Power, reference signal receiving power
  • SRS Sounding Reference Signal, sounding reference signal
  • DMRS Demodulation Reference Signal, demodulation reference signal
  • CRC Cyclic Redundancy Check, Cyclic Redundancy Check
  • PSDCH Physical Sidelink Discovery Channel, physical sidelink communication discovery channel
  • PSBCH Physical Sidelink Broadcast Channel, physical sidelink broadcast channel
  • TDD Time Division Duplexing, Time Division Duplex
  • FDD Frequency Division Duplexing, Frequency Division Duplex
  • SIB System Information Block, system information block
  • SIB1 System Information Block Type 1, system information block type 1
  • SLSS Sidelink synchronization Signal, side communication synchronization signal
  • PSSS Primary Sidelink Synchronization Signal, primary sidelink synchronization signal
  • SSSS Secondary Sidelink Synchronization Signal, side communication secondary synchronization signal
  • PCI Physical Cell ID, physical cell identification
  • PSS Primary Synchronization Signal, primary synchronization signal
  • SSS Secondary Synchronization Signal, secondary synchronization signal
  • BWP BandWidth Part, bandwidth fragment/part
  • GNSS Global Navigation Satellite System, global navigation satellite positioning system
  • SFN System Frame Number, system (wireless) frame number
  • DFN Direct Frame Number, direct frame number
  • SSB Synchronization Signal Block, Synchronization System Information Block
  • EN-DC EUTRA-NR Dual Connection, LTE-NR Dual Connection
  • MCG Master Cell Group, main cell group
  • SCG Secondary Cell Group, secondary cell group
  • PCell Primary Cell, main cell
  • SCell Secondary Cell, auxiliary cell
  • PSFCH Physical Sidelink Feedback Channel, physical sidelink communication feedback channel
  • SPS Semi-Persistant Scheduling, semi-static scheduling
  • PT-RS Phase-Tracking Reference Signals, phase tracking reference signal
  • CB Code Block, coding block/code block
  • QPSK Quadrature Phase Shift Keying, Quadrature Phase Shift Keying
  • 16/64/256 QAM 16/64/256 Quadrature Amplitude Modulaion, quadrature amplitude modulation
  • AGC Auto Gain Control, automatic gain control
  • ARFCN Absolute Radio Frequency Channel Number, Absolute Radio Frequency Channel Number
  • SC-FDMA Single Carrier-Frequency Division Multiple Access, single carrier-frequency division multiple access
  • MAC Medium Access Control, media access control layer
  • PDU Protocol Data Unit, protocol data unit
  • V2X in this article can also mean sidelink; similarly, sidelink in this article can also mean V2X, which will not be specifically distinguished and limited in the following text.
  • the resource allocation method of V2X (sidelink) communication in the description of the present invention and the transmission mode of V2X (sidelink) communication can be equivalently replaced.
  • the resource allocation manner mentioned in the specification may represent a transmission mode, and the transmission mode involved may represent a resource allocation manner.
  • transmission mode 1 represents a transmission mode (resource allocation method) based on base station scheduling
  • transmission mode 2 represents a transmission mode (resource allocation method) based on user equipment sensing and resource selection.
  • the PSCCH in the specification of the present invention is used to carry the SCI.
  • the PSCCHs involved in the description of the present invention correspond to, or correspond to, or relate to, or the scheduled PSSCHs have the same meaning, and they all represent associated PSSCH or corresponding PSSCH.
  • the corresponding, or corresponding, or related SCIs (including the first-level SCI and the second-level SCI) of the PSSCH mentioned in the specification have the same meaning, and all indicate associated SCU or corresponding SCI.
  • the first level SCI is called 1st 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) , transmitted in the resources of the corresponding PSSCH.
  • the parameter set numerology includes two meanings of subcarrier spacing and cyclic prefix CP length.
  • Table 4.2-1 shows the supported transmission parameter set, as follows shown.
  • each slot contains 14 OFDM symbols; for an extended CP, each slot contains 12 OFDM symbols.
  • NR and LTE have the same definition for a subframe (subframe), which means 1 ms.
  • subframe For subcarrier spacing configuration ⁇ , the slot number in 1 subframe (1ms) can be expressed as range from 0 to The slot number in a system frame (frame, duration 10ms) can be expressed as range from 0 to in, and The definition of the situation at different subcarrier spacing ⁇ is shown in the table below.
  • Table 4.3.2-1 The number of symbols contained in each slot in normal CP, the number of slots contained in each system frame, and the number of slots contained in each subframe
  • Table 4.3.2-2 The number of symbols contained in each slot when the CP is extended (60kHz), the number of slots contained in each system frame, and the number of slots contained in each subframe
  • the number SFN of the system frame ranges from 0 to 1023.
  • the concept of direct system frame number DFN is introduced in side communication, and the number range is also 0 to 1023.
  • the above description of the relationship between system frame and numerology can also be applied to direct system frame, for example, the duration of a direct system frame Also equal to 10ms, for a subcarrier spacing of 15kHz, a direct system frame includes 10 time slots, and so on. DFN is applied to the timing timing on the sidelink carrier.
  • LTE including LTE V2X parameter set and time slot slot in LTE (including LTE V2X) and subframe subframe
  • LTE only supports subcarrier spacing of 15kHz.
  • Extended (Extended) CP is supported in LTE, and normal CP is also supported.
  • the subframe subframe has a duration of 1 ms and includes two slots, and each slot has a duration of 0.5 ms.
  • each subframe contains 14 OFDM symbols, and each slot in the subframe contains 7 OFDM symbols; for extended CP, each subframe contains 12 OFDM symbols, and each slot in the subframe contains 6 OFDM symbols.
  • a resource block RB is defined in the frequency domain as consecutive subcarriers, for example, for a subcarrier spacing of 15kHz, the RB is 180kHz in the frequency domain.
  • a resource element RE represents one subcarrier in the frequency domain and one OFDM symbol in the time domain.
  • Partial-Coverage sidelink communication one of the UEs performing sidelink communication has no network coverage, and the other UE has network coverage.
  • the UE From the perspective of the UE side, the UE has only two scenarios: no network coverage and network coverage. Partial network coverage is described from the perspective of sidelink communication.
  • Fig. 1 is a schematic diagram showing LTE V2X UE sidelink communication.
  • UE1 sends sidelink communication control information (SCI format 1) to UE2, which is carried by the physical layer channel PSCCH.
  • SCI format 1 includes PSSCH scheduling information, such as PSSCH frequency domain resources.
  • UE1 sends sidelink communication data to UE2, which is carried by the physical layer channel PSSCH.
  • the PSCCH and the corresponding PSSCH adopt frequency division multiplexing, that is, the PSCCH and the corresponding PSSCH are located in the same subframe in the time domain, and are located in different RBs in the frequency domain.
  • a transmission block TB may contain only one initial transmission, or one initial transmission and one blind retransmission (blind retransmission, which means retransmission not based on HARQ feedback).
  • SCI format 1 can be carried in PSCCH, wherein SCI format 1 includes at least frequency domain resource information of PSSCH. For example, for the frequency domain resource indication domain, SCI format 1 indicates the starting sub-channel number and the number of continuous sub-channels of the PSSCH corresponding to the PSCCH.
  • PSSCH occupies one subframe in the time domain, and the corresponding PSCCH adopts frequency division multiplexing (FDM).
  • PSSCH occupies one or more continuous sub-channels in the frequency domain.
  • the sub-channel represents n subCHsize consecutive RBs in the frequency domain.
  • the n subCHsize is configured by the RRC parameter, the number of starting sub-channels and continuous sub-channels Indicated by the frequency domain resource indication field of SCI format 1.
  • Figure 2 shows two resource allocation methods of LTE V2X, which are called resource allocation based on base station scheduling (Transmission Mode 3) and resource allocation based on UE sensing (Transmission Mode 4).
  • transmission mode 3 of LTE V2X corresponds to transmission mode 1 in NR V2X, which is a transmission mode based on base station scheduling
  • transmission mode 4 of LTE V2X corresponds to transmission mode 2 in NR V2X, which is based on UE perception transfer mode.
  • the base station can configure the resource allocation mode of the UE through UE-level dedicated RRC signaling (dedicated RRC signaling) SL-V2X-ConfigDedicated, or called the transmission mode of the UE , Specifically:
  • Resource allocation method based on base station scheduling means that the frequency domain resources used by the sidelink sidelink communication come from the scheduling of the base station.
  • Transmission mode 3 includes two scheduling methods, namely dynamic scheduling and semi-persistent scheduling (SPS).
  • SPS semi-persistent scheduling
  • the UL grant DCI format 5A
  • the CRC of PDCCH or EPDCCH carrying DCI format 5A is scrambled by SL-V-RNTI.
  • the base station configures one or more (up to 8) configured scheduling grants (configured grants) through IE: SPS-ConfigSL-r14, and each configured scheduling grant contains a scheduling grant number (index) and scheduling Licensed resource period.
  • the UL grant (DCI format 5A) includes the frequency domain resources of the PSSCH, and the indication information (3 bits) of the scheduling grant number and the indication information of SPS activation (activate) or release (release, or deactivation).
  • the CRC of PDCCH or EPDCCH carrying DCI format 5A is scrambled by SL-SPS-V-RNTI.
  • the RRC signaling SL-V2X-ConfigDedicated when the RRC signaling SL-V2X-ConfigDedicated is set to scheduled-r14, it means that the UE is configured in a transmission mode based on base station scheduling.
  • the base station configures SL-V-RNTI or SL-SPS-V-RNTI through RRC signaling, and uses PDCCH or EPDCCH (DCI format 5A, CRC uses SL-V-RNTI scrambling or SL-SPS-V-RNTI scrambling ) sending an uplink scheduling grant UL grant to the UE.
  • the above-mentioned uplink scheduling grant UL grant includes at least scheduling information of PSSCH frequency domain resources in sidelink communication.
  • the PSSCH frequency domain resource indication field in the uplink scheduling grant UL grant (DCI format 5A) is used as the PSCCH (SCI format 1) PSSCH frequency domain resource indication information, and send PSCCH (SCI format 1) and the corresponding PSSCH.
  • the UE receives DCI format 5A scrambled by SL-SPS-V-RNTI on downlink subframe n. If DCI format 5A contains SPS activation indication information, the UE determines the frequency domain resources of PSSCH according to the indication information in DCI format 5A, and determines the time domain resources of PSSCH (PSSCH transmission subframe) according to subframe n and other information.
  • Resource allocation mode based on UE sensing means that the resources used for sidelink communication are based on the UE's sensing process of the set of candidate available resources.
  • the RRC signaling SL-V2X-ConfigDedicated is set to ue-Selected-r14, it indicates that the UE is configured as a transmission mode based on UE sensing.
  • 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 (resource pool) according to certain rules (for a detailed process description, refer to the LTE V2X UE sensing process section) , and send PSCCH (SCI format 1) and corresponding PSSCH.
  • the resources sent and received by the UE belong to the resource pool resource pool.
  • the base station schedules transmission resources for sidelink UEs in the resource pool, or, for the transmission mode based on UE perception in sidelink communication, the UE determines transmission resources in the resource pool.
  • the sidelink communication user equipment selects candidate resources within a time window (optionally, resource selection window [n+T1, n+T2]), and
  • the reserved resources indicated by the PSCCH sent by other user equipments in the slot determine candidate resources overlapping with the reserved resources, and exclude 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 the PSSCH/PSCCH.
  • the set of transmission resources selected by the MAC layer is called a selected sidelink grant.
  • the sidelink communication resources included in a selected sidelink grant can be used for the initial transmission and all retransmissions of one MAC PDU (corresponding to one transport block TB), or can be used for the initial transmission and all retransmissions of multiple MAC PDUs (corresponding to multiple transport block TBs). All retransmissions.
  • the present invention does not make any limitation to this.
  • the upper layer requests or triggers the physical layer to determine resources for PSSCH/PSCCH transmission on time slot n (for sensing or partial sensing).
  • the resource selection window is defined as [n+T1, n+T2], that is, the user equipment selects transmission resources within this window.
  • T1 satisfies the condition The selection of T1 depends on the implementation of the user equipment; the RRC configuration information includes a configuration list sl-SelectionWindowList of a resource selection window, wherein, the list corresponds to a given priority prio TX (priority of transmitting PSSCH) element representation It is T 2min .
  • T2 If the T 2min is less than the remaining packet delay budget (remaining packet delay budget, referred to as remaining PDB), then T2 satisfies the condition T 2min ⁇ T2 ⁇ remaining PDB, and 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 ( ⁇ SL represents the subcarrier spacing parameter of side communication, that is, the subcarrier spacing is ):
  • discontinuous reception refers to monitoring side communication control information SCI (including level 1 SCI and level 2 SCI) in a part of the time domain, and this time is called the active period (Active time ).
  • the sending user equipment configures the relevant configuration information of SL DRX for the receiving user equipment through sideline communication RRC signaling (PC5RRC); for groupcast (groupcast) and broadcast (broadcast),
  • PC5RRC sideline communication RRC signaling
  • groupcast groupcast
  • broadcast broadcast
  • SIB broadcast message
  • Layer 2 ID Layer-2 ID
  • Layer 1 ID Layer 1 ID
  • layer 2 identification includes source layer 2 identification (Source layer-2 ID) and target layer 2 identification (Destination layer-2 ID). Both source layer 2 identification and target layer 2 identification are 24 bits.
  • Layer 1 ID includes source layer 1 ID (Source layer-1 ID) and target layer 1 ID (Destination layer-1 ID). Wherein, the source layer 1 identifier represents the last 8 bits of the source layer 2 identifier (the first bit from the left is the first bit); the target layer 1 identifier represents the last 16 bits of the target layer 2 identifier. Both the source layer 1 identifier and the target layer 1 identifier are carried in the secondary SCI. The first 16 bits of the source layer 2 identifier and the first 8 bits of the target layer 2 identifier are in the sub-header (MAC PDU sub-header) of the MAC PDU corresponding to the secondary SCI.
  • MAC PDU sub-header sub-header
  • a mechanism for checking selected sidelink communication resources is supported. For example, when the configuration information of the resource pool for sidelink communication is reconfigured, the result of the resource selection (reselection) check triggers the user equipment to perform a resource selection (or, reselection) process.
  • the result of the resource selection (reselection) check is to trigger the user equipment to perform a resource selection (or reselection) process, including but not limited to the reconfiguration of the above resource pool configuration information.
  • Fig. 3 is a schematic diagram showing the basic process of the method executed by the user equipment according to Embodiment 1 of the present invention.
  • the steps performed by the user equipment include:
  • step S101 the sidelink communication user equipment selects and generates a selected sidelink communication scheduling grant (selected sidelink grant), and, optionally, sidelink communication data is available on a logical channel.
  • the one selected sidelink communication scheduling permission corresponds to the transmission of one or more MAC protocol data units (PDUs).
  • PDUs MAC protocol data units
  • step S102 the user equipment performs (performs) a transmission resource selection (reselection) process.
  • resource selection or reselection
  • the user equipment performs a process of sending resource selection (or reselection).
  • the resource allocation manner of the user equipment is a perception-based resource allocation manner, or a partial perception-based resource allocation manner, or a random resource selection.
  • SL DRX discontinuous reception of SL DRX is configured (activated, or enabled) for sideline communication, or, optionally, if (the MAC PDU corresponds (or, associated)) the target (Destination ) configured (activated, or, enabled) SL DRX, or, optionally, for unicast transmission, if (the MAC PDU corresponds to (or, associated)) a pair of source layer 1 (or, layer 2 ) ID and target layer 1 (or, layer 2) ID are configured (activated, or enabled) SL DRX, for multicast and broadcast transmission, if (the MAC PDU corresponds (or, associated)) target layer 1 (or, layer 2) indicates that SL DRX is configured (activated, or enabled), then,
  • the user equipment selects the sidelink communication time-frequency resource r i for one transmission opportunity (one transmission opportunity), at least according to: the sidelink communication time-frequency resource r i is in the active period (active period) of the SL DRX time), and/or,
  • the user equipment selects (randomly) sidelink communication time-frequency resources from available sidelink communication resources for the one or more transmission opportunities , so that at least: the selected sidelink communication time-frequency resource and/or the earliest resource in the time domain in the r i is within the active period of the SL DRX.
  • step S103 the user equipment determines that among all the selected transmission opportunities, the earliest transmission opportunity in the time domain is the initial transmission opportunity, and the other transmission opportunities are retransmission transmission opportunities.
  • the steps performed by the user equipment include:
  • step S101 the sidelink communication user equipment selects to create a selected sidelink communication scheduling grant (selected sidelink grant), and, optionally, sidelink communication data is available on the logical channel.
  • the one selected sidelink communication scheduling permission corresponds to the transmission of one or more MAC protocol data units (PDUs).
  • PDUs MAC protocol data units
  • step S102 the user equipment performs (performs) a transmission resource selection (reselection) process.
  • resource selection or reselection
  • the user equipment performs a process of sending resource selection (or reselection).
  • the resource allocation manner of the user equipment is a perception-based resource allocation manner, or a partial perception-based resource allocation manner, or a random resource selection.
  • SL DRX discontinuous reception of SL DRX is configured (activated, or enabled) for sideline communication, or, optionally, if (the MAC PDU corresponds (or, associated)) the target (Destination ) configured (activated, or, enabled) SL DRX, or, optionally, for unicast transmission, if (the MAC PDU corresponds to (or, associated)) a pair of source layer 1 (or, layer 2 ) ID and target layer 1 (or, layer 2) ID are configured (activated, or enabled) SL DRX, for multicast and broadcast transmission, if (the MAC PDU corresponds (or, associated)) target layer 1 (or, layer 2) indicates that SL DRX is configured (activated, or enabled), then,
  • the user equipment selects a sidelink communication time-frequency resource r i for one transmission opportunity.
  • the user equipment does not select HARQ retransmission, at least according to: the sidelink communication
  • the time-frequency resource r i is within the active period (active time) of the SL DRX, and/or,
  • the user equipment selects (randomly) sidelink communication time-frequency resources from available sidelink communication resources for the one or more transmission opportunities , so that at least: the selected sidelink communication time-frequency resource and/or the earliest resource in the time domain in the r i is within the active period of the SL DRX.
  • step S103 the user equipment determines that among all the selected transmission opportunities, the earliest transmission opportunity in the time domain is the initial transmission opportunity, and the other transmission opportunities are retransmission transmission opportunities.
  • the steps performed by the user equipment include:
  • step S101 the sidelink communication user equipment selects to create a selected sidelink communication scheduling grant (selected sidelink grant), and, optionally, sidelink communication data is available on the logical channel.
  • the one selected sidelink communication scheduling permission corresponds to the transmission of one or more MAC protocol data units (PDUs).
  • PDUs MAC protocol data units
  • step S102 the user equipment performs (performs) a transmission resource selection (reselection) process.
  • resource selection or reselection
  • the user equipment performs a process of sending resource selection (or reselection).
  • the resource allocation manner of the user equipment is a perception-based resource allocation manner, or a partial perception-based resource allocation manner, or a random resource selection.
  • SL DRX discontinuous reception of SL DRX is configured (activated, or enabled) for sideline communication, or, optionally, if the target (corresponding to (or associated with) the MAC PDU) (Destination) SL DRX is configured (activated, or enabled), or, optionally, for unicast transmission, if (the MAC PDU corresponds (or, associated)) a pair of source layer 1 (or, Layer 2) identification and target layer 1 (or, layer 2) identification are configured (activated, or enabled) SL DRX, for multicast and broadcast transmission, if (the MAC PDU corresponds to (or, associated))
  • the target layer 1 (or, layer 2) flag is configured (activated, or enabled) with SL DRX
  • the user equipment selects the sidelink communication time-frequency resource r i for one transmission opportunity, at least according to: the sidelink communication time-frequency resource r i is in the active period of the SL DRX (active time), and/or,
  • the user equipment selects (randomly) sidelink communication time-frequency resources from available sidelink communication resources for the one or more transmission opportunities , so that at least: the selected sidelink communication time-frequency resource is located behind the r i in the time domain.
  • step S103 the user equipment determines that among all the selected transmission opportunities, the earliest transmission opportunity in the time domain is the initial transmission opportunity, and the other transmission opportunities are retransmission transmission opportunities.
  • FIG. 4 is a block diagram showing a user equipment UE according to the present invention.
  • 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, and the like.
  • the memory 802 may include, for example, a volatile memory (such as a random access memory RAM), a hard disk drive (HDD), a nonvolatile memory (such as a flash memory), or other memories.
  • Memory 802 has program instructions stored thereon. When the instruction is executed by the processor 801, the above method described in detail in the present invention and executed by the user equipment may be executed.
  • the method and related equipment of the present invention have been described above in conjunction with preferred embodiments. Those skilled in the art can understand that the methods shown above are only exemplary, and the embodiments described above can be combined with each other without conflicts.
  • 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, may also include modules that can be developed or developed in the future and can be used for base stations, MMEs, or UEs, and the like.
  • the various identifiers shown above are only exemplary rather than restrictive, and the present invention is not limited to specific information elements as examples of these identifiers. Numerous variations and modifications may be made by those skilled in the art in light of the teachings of the illustrated embodiments.
  • various components inside the base station and user equipment in the above embodiments can be realized by various devices, including but not limited to: analog circuit devices, digital circuit devices, digital signal processing (DSP) circuits, programmable processing Devices, Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs), Programmable Logic Devices (CPLDs), etc.
  • DSP digital signal processing
  • ASICs Application Specific Integrated Circuits
  • FPGAs Field Programmable Gate Arrays
  • CPLDs Programmable Logic Devices
  • base station may refer to a mobile communication data and control switching center with relatively large transmission power and wide coverage area, including functions such as resource allocation and scheduling, data reception and transmission.
  • User equipment may refer to a user's mobile terminal, including, for example, a mobile phone, a notebook, and other terminal equipment capable of wirelessly communicating with a base station or a micro base station.
  • embodiments of the present invention disclosed herein may be implemented on a computer program product.
  • the computer program product is a product having a computer-readable medium encoded with computer program logic that, when executed on a computing device, provides associated operations to implement Above-mentioned technical scheme of the present invention.
  • the computer program logic When executed on at least one processor of a computing system, the computer program logic causes the processor to execute the operations (methods) described in the embodiments of the present invention.
  • Such arrangements of the invention are typically provided as software, code and/or other data structures arranged or encoded on a computer-readable medium such as an optical medium (e.g., CD-ROM), floppy disk, or hard disk, or as one or more other media of firmware or microcode on a ROM or RAM or PROM chip, or a downloadable software image in one or more modules, a shared database, etc.
  • Software or firmware or such configurations can be installed on the computing device, so that one or more processors in the computing device execute the technical solutions described in the embodiments of the present invention.
  • each functional module or each feature of the base station device and terminal device used in each of the above embodiments may be implemented or executed by a circuit, and the circuit is generally one or more integrated circuits.
  • Circuits designed to perform the various functions described in this specification may include general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs) or general-purpose integrated circuits, field-programmable gate arrays (FPGAs), or other possible Program logic devices, discrete gate or transistor logic, or discrete hardware components, or any combination of the above.
  • a general-purpose processor can be a microprocessor, or the processor can be an existing processor, controller, microcontroller, or state machine.
  • the general-purpose processor or each circuit described above may be configured by a digital circuit, or may be configured by a logic circuit.
  • the present invention can also use an integrated circuit obtained by using the advanced technology.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Quality & Reliability (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention se rapporte à un procédé exécuté par un équipement utilisateur et à un équipement utilisateur. Le procédé consiste à : choisir de générer une autorisation de planification de communication de liaison latérale sélectionnée ; exécuter une sélection ou une resélection de ressource d'envoi ; et déterminer que l'opportunité de transmission la plus précoce dans un domaine temporel parmi toutes les opportunités de transmission sélectionnées ou resélectionnées est une opportunité de transmission initiale, et que les autres opportunités de transmission sont des opportunités de transmission de retransmission.
PCT/CN2022/143993 2022-01-04 2022-12-30 Procédé exécuté par un équipement utilisateur et équipement utilisateur WO2023131074A1 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111867059A (zh) * 2019-04-30 2020-10-30 夏普株式会社 由用户设备执行的方法以及用户设备
US20210127417A1 (en) * 2019-10-29 2021-04-29 Lg Electronics Inc. Data transmission considering feedback and sidelink resource allocation
WO2021206466A1 (fr) * 2020-04-09 2021-10-14 Lg Electronics Inc. Rétroaction harq de liaison latérale et sélection de groupe de ressources

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111867059A (zh) * 2019-04-30 2020-10-30 夏普株式会社 由用户设备执行的方法以及用户设备
US20210127417A1 (en) * 2019-10-29 2021-04-29 Lg Electronics Inc. Data transmission considering feedback and sidelink resource allocation
WO2021206466A1 (fr) * 2020-04-09 2021-10-14 Lg Electronics Inc. Rétroaction harq de liaison latérale et sélection de groupe de ressources

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