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WO2022152163A1 - 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
WO2022152163A1
WO2022152163A1 PCT/CN2022/071581 CN2022071581W WO2022152163A1 WO 2022152163 A1 WO2022152163 A1 WO 2022152163A1 CN 2022071581 W CN2022071581 W CN 2022071581W WO 2022152163 A1 WO2022152163 A1 WO 2022152163A1
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Prior art keywords
user equipment
communication
resources
resource
slot
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PCT/CN2022/071581
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English (en)
Chinese (zh)
Inventor
赵毅男
罗超
刘仁茂
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Sharp Corp
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Sharp Corp
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/30—Services specially adapted for particular environments, situations or purposes
    • H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/02—Selection of wireless resources by user or terminal
    • 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
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/53—Allocation or scheduling criteria for wireless resources based on regulatory allocation policies

Definitions

  • the present invention relates to the technical field of wireless communication, and in particular, to a method performed by a user equipment and a corresponding user equipment.
  • D2D communication (Device-to-Device communication, direct device-to-device 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.
  • LTE Release 13 eD2D The main features introduced by LTE Release 13 eD2D include:
  • V2X stands for Vehicle to everything, hoping to realize the exchange of information between vehicles and all entities that may affect vehicles, with the purpose of reducing accidents, slowing traffic congestion, reducing environmental pollution and providing other information services.
  • the application scenarios of V2X mainly include four aspects:
  • V2V Vehicle to Vehicle, that is, vehicle-to-vehicle communication
  • V2P Vehicle to Pedestrian, that is, the vehicle sends a warning to pedestrians or non-motor 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 the PC5 interface.
  • the PC5 interface is mainly used to solve the communication problems of cellular vehicle networking in high-speed (up to 250 km/h) and high-node density environments. Vehicles can interact with information such as position, speed and direction through the PC5 interface, that is, vehicles can communicate directly through the PC5 interface.
  • the functions introduced by LTE Release 14 V2X mainly include:
  • the second phase of the V2X research topic belongs to the research 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 a feasibility study of transmit diversity.
  • resource allocation mode 2 (resource allocation mode 2) based on user equipment sensing (sensing) is supported, or transmission mode 2.
  • 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 obtaining the report of the physical layer, the upper layer selects the resource for the transmission of sideline communication. For the selected sidelink communication resources (or, the selected sidelink communication resource license, selected sidelink grant), the upper layer will re-evaluate some or all of the sidelink communication resources.
  • the solution of the present patent mainly includes a method for the user equipment to determine the moment of triggering re-evaluation, and a method for the user equipment to determine whether to re-evaluate the sideline communication resources.
  • 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 literature 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
  • the present invention provides a method performed by a user equipment and a user equipment.
  • the method performed by the user equipment according to the first aspect of the present invention includes: a higher layer or an upper layer of the user equipment requests a physical layer to determine a subset of sidelink communication resources; and the user equipment performs re-evaluation.
  • the upper layer or the upper layer selects the sideline communication resource from the subset of sideline communication resources.
  • the selected sideline communication resource is the selected sideline communication scheduling grant.
  • the upper layer or the upper layer requests or triggers the process of determining the subset of sideline communication resources on the time slot slot n.
  • the user equipment re-evaluates one or more resources in the selected sideline communication scheduling grant, and the user equipment indicates the one or more resources.
  • the user equipment is in the time slot slot re-evaluate the one or more resources above, wherein, Indicates the first processing delay.
  • the user equipment does not re-evaluate the one or more resources, wherein, Indicates the first processing delay.
  • User equipment comprising: a processor; and a memory storing instructions; wherein the instructions, when executed by the processor, execute any one of the above-mentioned first aspects of the present invention method.
  • the solution of the present invention can ensure that for the sideline communication resource selected by the upper layer, the moment of triggering re-evaluation occurs at the trigger time After sensing and selecting the moment of the sideline communication resource, the re-evaluation of the sideline communication resource can be carried out effectively, which improves the efficiency of user equipment perception and the transmission reliability of the sideline communication.
  • FIG. 1 is a schematic diagram illustrating sideline communication of an LTE V2X UE.
  • FIG. 2 is a schematic diagram illustrating a resource allocation manner of LTE V2X.
  • FIG. 3 is a schematic diagram showing the basic process of the method executed by the user equipment in the first and second embodiments of the invention.
  • FIG. 4 is a schematic diagram illustrating the basic process of the method executed by the user equipment in the third and fourth embodiments of the invention.
  • FIG. 5 is a block diagram illustrating a user equipment according to an embodiment of the present invention.
  • the 5G mobile communication system and its subsequent evolved versions are used as an example application environment to specifically describe various embodiments according to the present invention.
  • the present invention is not limited to the following embodiments, but can be applied to more other wireless communication systems, such as communication systems after 5G and 4G mobile communication systems before 5G.
  • 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, the temporary identifier of the cell wireless network
  • 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, modulation and coding scheme
  • RB Resource Block, resource block
  • CRB Common Resource Block, common 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
  • 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 Communication Broadcast Channel
  • TDD Time Division Duplexing
  • FDD Frequency Division Duplexing, frequency division duplexing
  • SIB1 System Information Block Type 1, system information block type 1
  • SLSS Sidelink synchronization Signal, side communication synchronization signal
  • PSSS Primary Sidelink Synchronization Signal, side communication main synchronization signal
  • SSSS Secondary Sidelink Synchronization Signal, side communication auxiliary synchronization signal
  • PCI Physical Cell ID, physical cell identification
  • PSS Primary Synchronization Signal, the main 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, the main cell group
  • SCG Secondary Cell Group, secondary cell group
  • PCell Primary Cell, the main cell
  • SCell Secondary Cell, secondary 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
  • Transport Block transport block
  • 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 Modulation, 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 multiplexing multiple access
  • MAC Medium Access Control, media access control layer
  • V2X in the text can also represent sidelink; similarly, sidelink in the text can also represent V2X, and no specific distinction or limitation will be made in the following text.
  • the resource allocation mode of V2X (sidelink) communication in the specification of the present invention and the transmission mode of V2X (sidelink) communication can be equivalently replaced.
  • the resource allocation method referred to in the specification may represent the transmission mode, and the transmission mode referred to may represent the resource allocation method.
  • 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 PSCCH involved in the description of the present invention corresponds to, or corresponds to, or is related to, or, the scheduled PSSCH indicates the same meaning, and both indicate associated PSSCH or corresponding PSSCH.
  • the PSSCH involved in the description corresponds to, or corresponds to, or has the same meaning as the related SCI (including the first-level SCI and the second-level SCI), which means associated SCI or corresponding SCI.
  • the first-level SCI is called 1st stage SCI or SCI format 0-1, and is transmitted in PSCCH;
  • the second-level SCI is called 2nd stage SCI or SCI format 0-2, and is transmitted in the corresponding PSSCH resources .
  • the selected sidelink communication resource involved in the description of the present invention also represents the selected sidelink communication resource scheduling grant (selected sidelink grant), which is not limited by the present invention.
  • the upper layer and the upper layer in the specification of the present invention may refer to the medium access control layer MAC layer, or other layers, which are not limited in the present invention.
  • both UEs performing sidelink communication have network coverage (for example, the UE detects at least one cell that satisfies the "cell selection criterion" on the frequency where sidelink communication needs to be performed, Indicates that the UE has network coverage).
  • 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 UE side, the UE has only two scenarios: no network coverage and network coverage. Part of the network coverage is described in terms of sidelink communication.
  • FIG. 1 is a schematic diagram illustrating sideline communication of an LTE V2X UE.
  • UE1 sends sideline communication control information (SCI format 1) to UE2, which is carried by the physical layer channel PSCCH.
  • SCI format 1 contains PSSCH scheduling information, such as PSSCH frequency domain resources.
  • UE1 sends sideline communication data to UE2, which is carried by the physical layer channel PSSCH.
  • the PSCCH and the corresponding PSSCH are in a frequency division multiplexing manner, 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 transport 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).
  • PSCCH occupies one subframe in the time domain and two consecutive RBs in the frequency domain.
  • the initialization of the scrambling sequence takes the predefined value 510 .
  • PSCCH can carry SCI format 1, wherein SCI format 1 contains at least frequency domain resource information of PSSCH. For example, for 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.
  • PSSCH occupies one subframe in the time domain, and adopts frequency division multiplexing (FDM) with the corresponding PSCCH.
  • PSSCH occupies one or more consecutive sub-channels in the frequency domain, sub-channels represent n subCHsize consecutive RBs in the frequency domain, n subCHsize is configured by the RRC parameter, the number of starting sub-channels and consecutive sub-channels Indicated by the frequency domain resource indication field of SCI format 1.
  • FIG. 2 shows two resource allocation methods of LTE V2X, which are respectively 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 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 the transmission mode of the UE. ,Specifically:
  • the UE When the UE successfully monitors the PDCCH or EPDCCH scrambled by SL-V-RNTI or SL-SPS-V-RNTI, it uses the PSSCH frequency domain resource indication field in the uplink scheduling grant UL grant (DCI format 5A) as the PSCCH Indication information of the frequency domain resources of PSSCH in (SCI format 1), and send PSCCH (SCI format 1) and the corresponding PSSCH.
  • DCI format 5A the PSSCH frequency domain resource indication field in the uplink scheduling grant UL grant
  • the resources sent and received by the UE belong to the resource pool resource pool.
  • the base station schedules transmission resources for the sidelink UE 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 parameter set numerology includes the subcarrier spacing and the cyclic prefix CP length.
  • Table 4.2-1 shows the set of supported transmission parameters, as follows shown.
  • NR and LTE have the same definition of subframe, which means 1ms.
  • subframe For the subcarrier spacing configuration ⁇ , the slot number in a subframe (1ms) can be expressed as The range is 0 to The slot number in a system frame (frame, duration 10ms) can be expressed as The range is 0 to in, and The definitions of the cases at different subcarrier spacing ⁇ are shown in the table below.
  • 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
  • LTE only supports subcarrier spacing of 15kHz.
  • Extended CP is supported in LTE, and normal CP is also supported.
  • the subframe subframe has a duration of 1ms and includes two slots, each of which has a duration of 0.5ms.
  • 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.
  • the resource block RB is defined in the frequency domain as consecutive sub-carriers, eg for a sub-carrier spacing of 15 kHz, the RB is 180 kHz in the frequency domain.
  • the resource element RE represents 1 subcarrier in the frequency domain and 1 OFDM symbol in the time domain.
  • resource allocation mode 2 re-evaluation of the transmission resources selected by the upper layer is supported, that is, before the time when the transmission resources are located, the selected transmission resources are re-sensed to judge the transmission resources. Whether the resource is still available.
  • FIG. 3 is a schematic diagram illustrating a basic process of a method performed by a user equipment according to Embodiment 1 of the present invention.
  • the steps performed by the user equipment include:
  • step S101 optionally, a higher layer (or, an upper layer) of the sideline communication user equipment requests the physical layer to determine a subset of resources for sideline communication.
  • the selected sidelink communication resource is referred to as a selected sidelink communication scheduling grant (selected sidelink grant).
  • the higher layer requests (or triggers a trigger) the process of determining the subset of sideline communication resources on time slot n.
  • the user equipment re-evaluates one or more resources in the selected sideline communication scheduling grant.
  • the user equipment indicates (signal at first time) the one or more resources on the time slot m.
  • the user equipment is in the time slot
  • the one or more resources are re-evaluated above. in, Indicates the first processing delay.
  • FIG. 3 is a schematic diagram illustrating a basic process of a method executed by a user equipment according to Embodiment 2 of the present invention.
  • the upper layer selects a sideline communication resource from the subset of sideline communication resources, optionally, for transmission of the physical sideline communication shared channel PSSCH and the physical sideline communication control channel PSCCH,
  • the selected sidelink communication resource is referred to as a selected sidelink communication scheduling grant (selected sidelink grant).
  • step S102 the user equipment performs re-evaluation.
  • the user equipment re-evaluates one or more resources in the selected sideline communication scheduling grant.
  • the user equipment indicates (signal at first time) the one or more resources on the time slot m.
  • the user equipment does not re-evaluate the one or more resources.
  • FIG. 4 is a schematic diagram illustrating a basic process of a method performed by a user equipment according to Embodiment 3 of the present invention.
  • the steps performed by the user equipment include:
  • the user equipment provides the parameters for PSSCH/PSCCH transmission on time slot slot n.
  • a candidate single-slot resource (candidate single-slot resource) is defined as any time slot in the resource pool and, optionally, the user equipment considers (or, assumes , assume) that the time interval [the n+T1, the n+T2] is included in the time interval [the n+T1, the n+T2]
  • Any of the L subCH consecutive sub-channels in the resource pool (in any time slot) corresponds to a single-slot candidate resource, and, except for the time interval [the n+T1, the ] is a single-slot candidate resource within .
  • T1 represents the first time interval
  • T2 represents the second time interval
  • represents the first processing delay and, optionally,
  • FIG. 4 is a schematic diagram illustrating a basic process of a method performed by a user equipment according to Embodiment 4 of the present invention.
  • the resource allocation manner of the user equipment is a resource allocation manner based on user equipment perception.
  • the parameter for PSSCH/PSCCH transmission includes at least the number L subCH of sub-channels used for PSSCH/PSCCH transmission.
  • FIG. 5 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, or the like.
  • the memory 802 may include, for example, volatile memory (eg, random access memory RAM), a hard disk drive (HDD), non-volatile memory (eg, flash memory), or other memory, and the like.
  • the 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 can be executed.
  • the above-described embodiments of the present invention may be implemented by software, hardware, or a combination of both.
  • the various components inside the base station and the user equipment in the above embodiments may be implemented by various devices, including but not limited to: analog circuit devices, digital circuit devices, digital signal processing (DSP) circuits, programmable processing Controllers, 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 larger transmission power and wider coverage area, including functions such as resource allocation and scheduling, data reception and transmission, and the like.
  • User equipment may refer to a user mobile terminal, for example, including a mobile phone, a notebook, and other terminal equipment that can wirelessly communicate with a base station or a micro base station.
  • each functional module or each feature of the base station device and the terminal device used in each of the above embodiments may be implemented or executed by a circuit, which is usually 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 Program logic devices, discrete gate or transistor logic, or discrete hardware components, or any combination of the above.
  • a general-purpose processor may be a microprocessor, or the processor may be an existing processor, controller, microcontroller, or state machine.
  • the general-purpose processor or each circuit described above may be configured by digital circuits, or may be configured by logic circuits.
  • the present invention can also use the integrated circuit obtained by using the advanced technology.

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Abstract

La présente invention concerne un procédé exécuté par un équipement utilisateur et un équipement utilisateur. Le procédé comprend les étapes suivantes : une couche supérieure ou une couche élevée d'un équipement utilisateur demande à une couche physique de déterminer un sous-ensemble de ressources de communication de liaison latérale ; et l'équipement utilisateur effectue une ré-évaluation.
PCT/CN2022/071581 2021-01-14 2022-01-12 Procédé exécuté par un équipement utilisateur et équipement utilisateur Ceased WO2022152163A1 (fr)

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WO2025067147A1 (fr) * 2023-09-26 2025-04-03 夏普株式会社 Procédé exécuté par un équipement utilisateur et équipement utilisateur
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WO2025067148A1 (fr) * 2023-09-25 2025-04-03 夏普株式会社 Procédé exécuté par un équipement utilisateur et équipement utilisateur
WO2025067147A1 (fr) * 2023-09-26 2025-04-03 夏普株式会社 Procédé exécuté par un équipement utilisateur et équipement utilisateur

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