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WO2025140273A1 - 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
WO2025140273A1
WO2025140273A1 PCT/CN2024/142195 CN2024142195W WO2025140273A1 WO 2025140273 A1 WO2025140273 A1 WO 2025140273A1 CN 2024142195 W CN2024142195 W CN 2024142195W WO 2025140273 A1 WO2025140273 A1 WO 2025140273A1
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WO
WIPO (PCT)
Prior art keywords
user equipment
communication
resource
sidelink
channel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/CN2024/142195
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English (en)
Chinese (zh)
Inventor
赵毅男
罗超
刘仁茂
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sharp Corp
Original Assignee
Sharp Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sharp Corp filed Critical Sharp Corp
Publication of WO2025140273A1 publication Critical patent/WO2025140273A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H04W72/231—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal the control data signalling from the layers above the physical layer, e.g. RRC or MAC-CE signalling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/25—Control channels or signalling for resource management between terminals via a wireless link, e.g. sidelink
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/40—Resource management for direct mode communication, e.g. D2D or sidelink

Definitions

  • the present invention relates to the field of wireless communication technology, and in particular to a method executed by a user equipment and corresponding user equipment.
  • D2D communication (Device-to-Device communication) refers to the direct communication between two user devices without forwarding through a base station or core network.
  • 3GPP 3rd Generation Partnership Project
  • the upper layer supports unicast and multicast communication functions.
  • LTE Release 13 eD2D The main functions introduced by LTE Release 13 eD2D include:
  • FIG1 is a schematic diagram showing a basic process of a method executed by a user equipment in the first embodiment of the present invention.
  • FIG. 2 is a block diagram showing a user equipment according to an embodiment of the present invention.
  • the following uses the 5G mobile communication system and its subsequent evolution versions as example application environments to specifically describe multiple embodiments of the present invention.
  • the present invention is not limited to the following embodiments, but is applicable to more other wireless communication systems, such as communication systems after 5G and 4G mobile communication systems before 5G.
  • 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
  • eNB evolved NodeB, evolved base station
  • gNB NR base station
  • TTI Transmission Time Interval, transmission time interval
  • OFDM 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, sidelink communication control information
  • PSCCH Physical Sidelink Control Channel, physical sidelink communication control channel
  • MCS Modulation and Coding Scheme, modulation and coding scheme
  • PRB Physical Resource Block, physical resource block
  • TDD Time Division Duplexing
  • PCI Physical Cell ID, physical cell identifier
  • PSS Primary Synchronization Signal, primary synchronization signal
  • GNSS Global Navigation Satellite System, Global Navigation Satellite 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
  • PCell Primary Cell
  • PSFCH Physical Sidelink Feedback Channel, physical sidelink communication feedback channel
  • 16/64/256QAM 16/64/256Quadrature Amplitude Modulation, quadrature amplitude modulation
  • AGC Auto Gain Control, automatic gain control
  • TDRA Time Domain Resource Assignment
  • time domain resource allocation indication field
  • FDRA Frequency Domain Resource Assignment, frequency domain resource allocation indication (field)
  • ARFCN Absolute Radio Frequency Channel Number, absolute radio frequency channel number
  • SC-FDMA Single Carrier-Frequency Division Multiple Access
  • MAC Medium Access Control, media access control layer
  • MAC CE MAC Control Element, MAC layer control unit
  • PDU Protocol Data Unit, protocol data unit
  • SL-U Sidelink unlicensed, sidelink communication on unlicensed spectrum
  • NR-U NR unlicensed, NR communication on unlicensed spectrum
  • TBS Transport Block Size, transport block size
  • CQI Channel Quality Information, channel quality information
  • COT Channel Occupancy Time, channel occupancy time
  • MCSt Multiple Consecutive Slots transmission, multiple continuous time slot transmission
  • IUC Inter-UE Coordination, collaboration between UEs
  • V2X and sidelink mentioned in the specification of the present invention have the same meaning.
  • 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 method 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 method involved in the specification can represent the transmission mode, and the transmission mode involved can 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 SCI.
  • the PSCCH corresponding to, or corresponding to, or related to, or scheduled PSSCH involved in the specification of the present invention has the same meaning, all indicating associated PSSCH or corresponding PSSCH.
  • the SCI (including the first-level SCI and the second-level SCI) corresponding to, or corresponding to, or related to, the PSSCH involved in the specification has the same meaning, all indicating associated SCI 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, or, SCI format 2-C), which is transmitted in the corresponding PSSCH resources.
  • the NR sideline communication (SL-U for short) on the unlicensed spectrum in the specification of the present invention may also be referred to as shared spectrum channel access, that is, on the unlicensed spectrum, there may be user devices that access the channel through Wifi technology (wireless LAN technology based on IEEE 802.11 standard), and there may also be NR sideline communication user devices that access the channel through the PC5 interface.
  • Wifi technology wireless LAN technology based on IEEE 802.11 standard
  • NR sideline communication user devices that access the channel through the PC5 interface.
  • the parameter set numerology includes two meanings: subcarrier spacing and cyclic prefix CP length.
  • Table 4.2-1 shows the supported transmission parameter sets, as shown below.
  • each slot contains 14 OFDM symbols; for the Extended CP, each slot contains 12 OFDM symbols.
  • Table 4.3.2-1 Number of symbols in each slot, number of slots in each system frame, number of slots in each subframe under normal CP
  • the system frame (or, simply referred to as frame) number SFN ranges from 0 to 1023.
  • the concept of direct system frame number DFN is introduced in sidelink communication, and the number range is also 0 to 1023.
  • the above description of the relationship between system frames and numerology can also be applied to direct system frames.
  • the duration of a direct system frame is also equal to 10ms.
  • a direct system frame includes 10 time slots, and so on. DFN is applied to timing on the sidelink carrier.
  • Resource blocks RB are defined in the frequency domain as For example, for a subcarrier spacing of 15 kHz, the RB is 180 kHz in the frequency domain. For a subcarrier spacing of 15 kHz ⁇ 2 ⁇ , the resource unit RE represents 1 subcarrier in the frequency domain and 1 OFDM symbol in the time domain.
  • 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).
  • Partial-Coverage sidelink communication One of the UEs performing sidelink communication has no network coverage, while the other UE has network coverage.
  • the UE From 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.
  • the resources sent and received by the UE belong to the resource pool.
  • 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 the transmission resources in the resource pool.
  • the frequency domain supports resource allocation based on sub-channels as the minimum granularity, that is, for PSSCH transmission, the resources occupied in the frequency domain are an integer number of sub-channels.
  • a sub-channel can represent several consecutive resource blocks RBs in the frequency domain.
  • the sidelink communication user equipment selects candidate resources within a time window (optionally, a resource selection window [n+T1, n+T2]), and determines the candidate resources that overlap with the reserved resources based on the reserved resources indicated by the PSCCH sent by other user equipment in the monitoring time slot, and excludes these overlapping candidate resources.
  • the physical layer reports the set of candidate resources that are not excluded to the MAC layer, and the MAC layer selects transmission resources for the PSSCH/PSCCH.
  • the set of transmission resources selected by the MAC layer is called a selected sidelink grant.
  • the sidelink communication resources contained in a selected sidelink grant can be used for the initial transmission and all retransmissions of a MAC PDU (corresponding to a transmission block TB), or can be used for the initial transmission and all retransmissions of multiple MAC PDUs (corresponding to multiple transmission blocks TB).
  • the present invention does not impose any restrictions on this.
  • the partial sensing resource allocation method means that the time slots monitored by the user equipment are discontinuous (or discrete) in the monitoring window, so it is called partial sensing.
  • the upper layer requests or triggers the physical layer to determine the resources for PSSCH/PSCCH transmission (perform sensing or partial sensing) in time slot n.
  • the resource selection window is defined as [n+T1, n+T2], that is, the user equipment selects the transmission resources within this window.
  • 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 element in the list corresponding to a given priority prio TX (priority for transmitting PSSCH) is represented as T 2min .
  • T2 If T 2min is less than the remaining packet delay budget (remaining PDB for short), 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.
  • T2 is set to remaining PDB.
  • ⁇ SL represents the subcarrier spacing parameter of side communication, that is, the subcarrier spacing is ):
  • LBT operation For wireless communications on unlicensed spectrum, some countries or regions (for example, Europe) stipulate that user equipment must perform LBT operation before transmitting wireless communications, which is a "listen before talk" mechanism, also known as channel access operation, which refers to a mechanism for determining channel availability by sensing the channel. Specifically, during a period of time before communication transmission, the user equipment will only transmit when it detects that the channel is idle; otherwise, the user equipment will not transmit.
  • LBT operation also known as channel access operation
  • the energy detected by the base station or user equipment on the channel is lower than the energy threshold value X Thresh for a duration equal to or greater than 4 ⁇ s, the base station or user equipment considers that the channel is idle within this time unit (or, referred to as LBT success).
  • the channel (channel) that the base station or user equipment detects energy and uses to determine whether it is idle represents a carrier containing a set of continuous resource blocks RB, or a part of the carrier.
  • the channel can also be called LBT bandwidth (LBT bandwidth), or LBT sub-band (LBT sub-band), or resource block set (RBset).
  • LBT bandwidth LBT bandwidth
  • LBT sub-band LBT sub-band
  • RBset resource block set
  • An LBT bandwidth or RB set can be equal to 20MHz in the frequency domain, that is, there can be an RB set on a 20MHz carrier.
  • the number of resource blocks RBs corresponding to multiple RB sets and a guard band (GB for short) between two consecutive RB sets included in a carrier (a carrier with a frequency exceeding 20 MHz, such as 40 MHz, 60 MHz, and 80 MHz) may be as shown in the following table:
  • Table 1 Number of RBs in all RB sets and GBs on a carrier at 15kHz and 30kHz subcarrier spacing
  • 105-6-105 means that the carrier contains two consecutive RB sets, each containing 105 RBs. Between the two RB sets, there is a guard band GB containing 6 consecutive RBs, which contains a total of 216 consecutive RBs, and so on for other items in Table 1.
  • the LBT operations performed by the (sideline communication) user equipment on different RB sets may be independent of each other (i.e., the two are unrelated). For example, the user equipment detects that the channel is idle on RB set 1, and the channel is occupied (or busy) on RB set 2. If the resources selected by the sideline communication user equipment for transmitting PSSCH/PSCCH include (all or part of) RBs corresponding to RB set 1 and RB set 2, the user equipment may send the corresponding PSSCH/PSCCH if and only if the user equipment detects that the channel is idle on both RB set 1 and RB set 2.
  • IUC Inter-UE coordination
  • the collaboration message sent by UE A to UE B is an indication of a resource set.
  • the resource set is a preferred resource set for UE B transmission (preferred resource set) and/or a non-preferred resource set for UE B transmission (non-preferred resource set);
  • the collaborative message sent by UE A to UE B indicates the existence of an expected (or potential) resource conflict (resource conflict) on the resources indicated by the SCI sent by UE B, and/or indicates the existence of a detected (resource conflict) on the resources indicated by the SCI sent by UE B.
  • the solution of the present invention refers to the first coordination solution between UEs, that is, the reported coordination information between UEs is a preferred resource set or a non-preferred resource set.
  • step S101 on an unlicensed spectrum or on a shared spectrum, a sideline communication user equipment receives MAC CE and/or sideline communication control information SCI.
  • the transmission structure of PSCCH/PSSCH is configured based on interlaced resource blocks (interlaced RB), that is, the RRC parameter transmissionStructureForPSCCHandPSSCH is configured to "interlaceRB”.
  • the SCI contains scheduling information of the MAC CE.
  • the MAC CE includes first IUC request information as request information for collaborative IUC between UEs.
  • the first IUC request information includes indication information of the number of first resource block sets RB sets, i.e., first RB set number indication information.
  • the SCI includes second IUC request information.
  • the second IUC request information includes indication information of the number of second RB sets.
  • the first RB set number indication information and the second RB set number indication information are the same.
  • the IUC report can be triggered by the MAC CE.
  • the 8th bit in the 6th byte and the 1st and 2nd (or 1st) bits in the 7th byte of the MAC CE are indication information of the number of the first RB sets.
  • step 102 the user device determines a preferred resource set (preferred resource set) or a non-preferred resource set (non-preferred resource set).
  • the MAC layer provides (or indicates) the first RB set number indication information or the second RB set number indication information to the physical layer to determine the preferred resource set or the non-preferred resource set.
  • FIG2 is a block diagram of a user equipment UE involved in 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, 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 memories, etc.
  • the memory 802 stores program instructions. When the instructions are executed by the processor 801, the above method performed by the user equipment described in detail in the present invention may be executed.
  • the method of the present invention and the related equipment have been described above in conjunction with the preferred embodiments. Those skilled in the art will appreciate that the method shown above is only exemplary, and the embodiments described above can be combined with each other without contradiction.
  • 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 that serve as examples of these identifiers. Those skilled in the art may make many changes and modifications based on the teachings of the illustrated embodiments.
  • the above embodiments of the present invention can be implemented by software, hardware, or a combination of software and hardware.
  • the various components inside the base station and user equipment in the above embodiments can be implemented by a variety of devices, including but not limited to: analog circuit devices, digital circuit devices, digital signal processing (DSP) circuits, programmable processors, application specific integrated circuits (ASICs), field programmable gate arrays (FPGAs), programmable logic devices (CPLDs), and the like.
  • 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 exchange center with a large transmission power and a wide coverage area, including functions such as resource allocation scheduling, data reception and transmission, etc.
  • User equipment may refer to a user mobile terminal, such as a mobile phone, a notebook, etc., which can communicate wirelessly with a base station or a micro base station.
  • the embodiments of the present invention disclosed herein can be implemented on a computer program product.
  • the computer program product is a product as follows: having a computer-readable medium, on which a 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 solution 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 perform the operation (method) described in the embodiment 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 in one or more modules, shared databases, etc.
  • 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 in one or more modules, shared databases, etc.
  • the software or firmware or such a configuration can be installed on a computing device so that one or more processors in the computing device execute the technical solution described in the embodiment of the present invention.
  • 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 above-mentioned general-purpose processor or each circuit may be configured by a digital circuit, or may be configured by a logic circuit.
  • the present invention may also use the integrated circuit obtained by using the advanced technology.

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

Abstract

La présente invention concerne un procédé exécuté par un équipement utilisateur, ainsi qu'un équipement utilisateur. Le procédé exécuté par un équipement utilisateur (UE) comprend les étapes suivantes : un UE, utilisé en tant qu'UE de communication en liaison latérale, reçoit un CE MAC sur un spectre sans licence ou un spectre partagé ; et l'UE détermine un ensemble de ressources préféré ou un ensemble de ressources non préféré, le CE MAC comprenant des informations de demande de coordination inter-UE (IUC), et les informations de demande IUC comprenant des informations d'indication du nombre d'ensembles de blocs de ressources (ensembles RB).
PCT/CN2024/142195 2023-12-25 2024-12-25 Procédé exécuté par un équipement utilisateur et équipement utilisateur Pending WO2025140273A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202311806329.2 2023-12-25
CN202311806329.2A CN120224434A (zh) 2023-12-25 2023-12-25 由用户设备执行的方法以及用户设备

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WO2025140273A1 true WO2025140273A1 (fr) 2025-07-03

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114362901A (zh) * 2020-10-14 2022-04-15 北京三星通信技术研究有限公司 Ue协作方法和终端
CN115884123A (zh) * 2021-09-28 2023-03-31 夏普株式会社 由用户设备执行的方法以及用户设备
CN117042169A (zh) * 2022-04-28 2023-11-10 夏普株式会社 由用户设备执行的方法以及用户设备
CN117242872A (zh) * 2021-05-11 2023-12-15 高通股份有限公司 针对资源池的用户设备间协调

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114362901A (zh) * 2020-10-14 2022-04-15 北京三星通信技术研究有限公司 Ue协作方法和终端
CN117242872A (zh) * 2021-05-11 2023-12-15 高通股份有限公司 针对资源池的用户设备间协调
CN115884123A (zh) * 2021-09-28 2023-03-31 夏普株式会社 由用户设备执行的方法以及用户设备
CN117042169A (zh) * 2022-04-28 2023-11-10 夏普株式会社 由用户设备执行的方法以及用户设备

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