WO2020088513A1 - Procédé exécuté par un équipement d'utilisateur et équipement d'utilisateur - Google Patents

Procédé exécuté par un équipement d'utilisateur et équipement d'utilisateur Download PDF

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Publication number
WO2020088513A1
WO2020088513A1 PCT/CN2019/114318 CN2019114318W WO2020088513A1 WO 2020088513 A1 WO2020088513 A1 WO 2020088513A1 CN 2019114318 W CN2019114318 W CN 2019114318W WO 2020088513 A1 WO2020088513 A1 WO 2020088513A1
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Prior art keywords
user equipment
slot format
configuration information
slots
uplink
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PCT/CN2019/114318
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English (en)
Chinese (zh)
Inventor
赵毅男
刘仁茂
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夏普株式会社
赵毅男
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H04L5/0008—Wavelet-division
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • 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

Definitions

  • the present invention relates to the field of wireless communication technology, and in particular, to a method executed by user equipment and a corresponding user equipment.
  • D2D communication (Device-to-Device communication) refers to a communication method directly performed 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 mainly includes 4 aspects:
  • V2V Vehicle to Vehicle, ie 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 PC5 interface.
  • the PC5 interface is mainly used to solve the problem of cellular vehicle networking communication 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 LTE Release 15 research category (see Non-Patent Document 4).
  • the main features introduced include high-order 64QAM modulation, V2X carrier aggregation, short TTI, and feasibility studies of transmit diversity.
  • the research plan for this topic includes the design of a sidelink synchronization mechanism.
  • the solution of the present invention is mainly directed to a design method in which a physical synchronization channel carries SFI (slot format indication) indication in a sidelink communication based on NR network technology and a method for a user equipment to determine SFI.
  • SFI slot format indication
  • the research plan of the NR-based V2X feasibility research project also includes the design goals of supporting physical layer unicast, multicast and broadcast.
  • Unicast means communication between a sending user equipment (UE) and a single receiving user equipment.
  • Multicast means that a group of high-level UEs are assigned the same ID, and UEs communicate within the group. Broadcasting is widely used in scenarios such as base station sending system messages to UEs in a cell in cellular communications.
  • LTE and NR communications the communication between the base station and the UE level uses unicast. Take the following data communication as an example, the data channel PDSCH is scrambled by the UE-specific C-RNTI to achieve unicast communication at the physical layer.
  • HARQ retransmission mechanisms are usually included in unicast communication.
  • Release 14/15 LTE V2X currently only supports broadcast communication between UEs, that is, control information and data sent by one UE can be received by one or more UEs and decoded correctly.
  • a HARQ retransmission mechanism needs to be specifically designed.
  • Non-Patent Document 1 RP-140518, Work itemproposal 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 3GPP V2X Phase 2
  • Non-Patent Document 5 RP-181480, New SID Proposal: Study NR V2X
  • the present invention proposes a method performed by a user equipment and user equipment, which can determine configuration information of an appropriate slot format at a user equipment that performs direct communication between UE and UE, or Send edge connection system information with appropriate reference subcarrier spacing.
  • a method performed by an edge-connected user equipment which includes: the edge-connected user equipment sends edge connection control information SCI, and the SCI includes indication information of whether to enable HARQ feedback.
  • the indication information of whether to enable HARQ feedback is a 1-bit indication field in the SCI, where a 1-bit indication field set to 1 indicates that HARQ feedback is enabled, and a 1-bit indication field set to 0 indicates to disable HARQ feedback.
  • a method performed by a user equipment including: acquiring configuration information of a time slot format from another device different from the user equipment; and configuring the acquired configuration according to the time slot format Information to determine a slot format corresponding to the subcarrier interval configured by the base station or the pre-configured user equipment.
  • the another device is a synchronization reference user equipment of the user equipment, or a base station that communicates with the user equipment.
  • the configuration information of the slot format includes: reference subcarrier interval, and / or configuration period, and / or number of downlink slots, and / or number of downlink orthogonal frequency division multiplexing OFDM symbols, and / or uplink The number of time slots and / or the number of upstream OFDM symbols.
  • the step of determining the slot format corresponding to the subcarrier interval configured by the base station or the pre-configured user equipment includes: based on the reference subcarrier interval and the reference subcarrier interval included in the configuration information of the slot format
  • the base station configuration or the numerical relationship between the subcarrier intervals pre-configured in the user equipment, the number of the downlink time slots and / or the number of the downlink OFDM symbols included in the configuration information of the time slot format, and / Or the number of uplink time slots, and / or the number of uplink OFDM symbols are converted into a time slot format described below, the time slot format includes the number of second downlink time slots, and / or the number of second downlink OFDM symbols, And / or the number of second uplink time slots, and / or the number of second uplink OFDM symbols.
  • a method performed by a user equipment including: acquiring configuration information including a slot format of a reference subcarrier interval from another device different from the user equipment; and transmitting edge connection system information ,
  • the edge connection system information includes an indication of subcarrier spacing.
  • the another device is a synchronization reference user equipment of the user equipment, or a base station that communicates with the user equipment.
  • the indication of the subcarrier interval is the minimum subcarrier interval or 0 pre-configured in the user equipment, or the reference subcarrier interval.
  • a user equipment including: a processor; and a memory, storing instructions, wherein the instructions execute the above method when executed by the processor.
  • the present invention it is possible to determine configuration information of an appropriate slot format at one user equipment performing direct UE-to-UE communication, or transmit edge connection system information having an appropriate reference subcarrier interval.
  • FIG. 1 is a schematic diagram illustrating an example of configuration information of a TDD uplink and downlink time slot format broadcast by an NR base station in the related art.
  • FIG. 2 is a schematic sequence diagram showing a direct communication process between UE and UE.
  • FIG. 3 is a diagram for explaining two resource allocation methods in a direct communication process between UE and UE.
  • FIG. 4 is a flowchart illustrating a method performed by a user equipment according to Embodiment 1 of the present invention.
  • FIG. 5 is a schematic diagram showing an example of a slot format before and after conversion in Embodiment 1 of the present invention.
  • FIG. 6 is a flowchart illustrating a method performed by a user equipment according to Embodiment 2 of the present invention.
  • FIG. 7 is a flowchart illustrating a method performed by a user equipment according to Embodiment 3 of the present invention.
  • FIG. 8 is a flowchart illustrating a method performed by a user equipment according to Embodiment 4 of the present invention.
  • FIG. 9 is a block diagram illustrating user equipment UE according to the present invention.
  • the following uses the 5G mobile communication system and its subsequent evolution as an example application environment, and specifically describes multiple 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 a communication system after 5G and a 4G mobile communication system before 5G.
  • 3GPP 3rd Generation Partnership Project
  • the third generation partnership project the third generation partnership project
  • LTE LongTerm 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
  • C-RNTI Cell Radio Network Temporary Identifier, the temporary identifier of the cell wireless network
  • CSI-RS CSI-ReferenceSignal, channel state measurement reference signal
  • CRS Cell Reference, cell-level 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, edge connection control information
  • PSCCH Physical Sidelink Control Channel, physical edge connection control channel
  • MCS Modulation and Coding Scheme, modulation and coding scheme
  • PRB Physical Resource Block, physical resource block
  • PSSCH Physical Sidelink Shared Channel, physical edge connection shared channel
  • FDM Frequency Division Multiplexing, frequency division multiplexing
  • RRC Radio Resource Control, radio resource control
  • RSRP Reference Signal Receiving Power, reference signal received power
  • DMRS Demodulation Reference Signal, demodulation reference signal
  • CRC Cyclic Redundancy Check, cyclic redundancy check
  • PSDCH Physical Sidelink Discovery Channel, physical edge connection discovery channel
  • PSBCH Physical Sidelink Broadcast Channel, physical edge connection broadcast channel
  • SFI Slot Format Indication, time slot format indication
  • TDD Time Division Duplexing, time division duplex
  • FDD Frequency, Duplexing, Frequency Division Duplex
  • SIB1 System Information Block Type 1, system information block type 1
  • SLSS Sidelink synchronization Signal, edge connection synchronization signal
  • PSSS Primary, Sidelink, Synchronization, Signal, edge connected to the main synchronization signal
  • SSSS Secondary, Sidelink, Synchronization, Signal, edge connection secondary synchronization signal
  • PCI Physical Cell ID, physical cell ID
  • BWP BandWidthPart, bandwidth segment / part
  • Both UEs that perform edge connection communication have network coverage (for example, the UE detects at least one cell that meets the "cell selection criterion" at a frequency that requires edge connection communication).
  • Partial-Coverage One of the UEs performing edge connection 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. Partial network coverage is described from the connection of UEs on both sides of the edge connection communication.
  • LTE supports a total of 7 types of TDD uplink and downlink configuration information, numbered TDD UL / DL configuration 0 to 6, as shown in Table 4.2-2 below.
  • “D” indicates a downlink subframe (subframe)
  • "U” indicates an uplink subframe
  • "S” indicates a special subframe (Special Subframe).
  • the special subframe is composed of a downlink symbol (DwPTS), a guard interval (Gap), and an uplink symbol (UpPTS).
  • the present invention is not related to the specific configuration of the special subframe and will not be repeated here.
  • the LTE base station configures the TDD uplink and downlink configuration information of the cell in SIB1.
  • the LTE edge connection uses LTE uplink resources, and the design of the physical layer channel structure is also similar to LTE uplink.
  • LTE Edge Connection defines the Edge Connection Synchronization Signal (SLSS), which is used to synchronize the frequency and time between two UEs that perform edge connection communication, especially when at least one of the UEs does not have network coverage, which is obtained by one UE SLSS synchronization signal sent by another UE.
  • SLSS includes primary synchronization signal PSSS and secondary synchronization signal SSSS.
  • PSSS and SSSS can carry SLSS ID. The principle is the same as that of PCI in LTE and NR cellular communication, which is carried by primary synchronization signal and secondary synchronization signal.
  • the LTE edge connection also defines the PSBCH, which is used to broadcast system information related to the edge connection (system information), where,
  • the time-frequency resources used by the PSBCH occupy 72 subcarriers in the center of the edge-connected carrier in the frequency domain, and occupy one subframe for the PSBCH in the time domain, but exclude those used for the DMRS reference signal and the above-mentioned SLSS synchronization signal RE.
  • the system information related to the edge connection transmitted on the PSBCH may be MIB-SL-V2X (MasterInformationBlock-SL-V2X, the main information block for V2X), which includes:
  • TDD configuration use the parameter tdd-ConfigSL.
  • tdd-ConfigSL There are 8 situations in tdd-ConfigSL. Where none means that the edge connection carrier sending the MIB is FDD, 0 means TDD UL / DL configuration information 0, 1 means TDD UL / DL configuration information 1, and so on.
  • the DFN direct frame number used to transmit SLSS and PSBCH, using the parameter directFrameNumber.
  • the DSFN direct subframe number used to transmit SLSS and PSBCH, using the parameter directSubframeNumber.
  • ⁇ There is a network coverage flag indicating whether the UE transmitting the MIB-SL-V2X has LTE network coverage, using the parameter inCoverage.
  • the LTE base station instructs V2X edge connection communication related resource configuration information through SIB21.
  • the UE can pre-configure a set of V2X edge connection parameters through a high-level protocol, and use the parameter SL-V2X-Preconfiguration.
  • UEs with network coverage can obtain configuration information related to V2X edge connection communication through SIB21, and UEs without network coverage can obtain configuration related to V2X edge connection communication through pre-configured V2X edge connection parameters and MIB-SL-V2X sent by other UEs information.
  • the UE with network coverage obtains the TDD uplink and downlink configuration information of the cell through SIB1 sent by the base station.
  • a UE without network coverage (denoted as UE1) can select the SLSS / PSBCH transmitted by another UE (with or without network coverage, denoted as UE2) as the synchronization reference for edge connection transmission.
  • UE2 can be considered It is the "synchronization reference UE" (or SyncRef UE for short) of UE1.
  • UE2 carries tdd-ConfigSL in the transmitted PSBCH, and UE1 obtains TDD uplink and downlink configuration information by receiving the edge connection system information.
  • LTE V2X UE sends SLSS / PSBCH
  • the UE When the V2X UE has data to transmit, the UE needs to send SLSS / PSBCH. At this time, the UE needs to determine the value of tdd-ConfigSL in the PSBCH.
  • tdd-ConfigSL has the same meaning as the tdd-Config configuration information in the LTE base station SIB1, that is, if the SIB1 is configured as TDD UL / DL configuration information 2, the UE will The value is set to TDD uplink and downlink configuration information 2, and so on;
  • Table 4.2-1 shows the supported transmission parameter set, as shown below .
  • ⁇ ⁇ f 2 ⁇ ⁇ 15 [kHz] CP (Cyclic Prefix) 0 15 normal 1 30 normal 2 60 Normal, extended 3 120 normal 4 240 normal
  • each slot contains 14 OFDM symbols; for an extended CP, each slot contains 12 OFDM symbols.
  • the gNB configures the cell-level slot format through the TDD-UL-DL-ConfigurationCommon in SIB1, which includes:
  • High-level parameters pattern1 including the following high-level parameters:
  • the number of downlink slots d slots the downlink slots only contain downlink OFDM symbols (may be called DL-only slot);
  • the upstream slots only contain upstream OFDM symbols (may be called UL-only slots);
  • the period of the above configuration information is Pms, corresponding to continuous Time slots.
  • FIG. 1 shows the specific meaning of each high-level parameter included in pattern1.
  • the first are d slots and the downlink slots, and u slots and the upstream slots are located at the end of the S slots.
  • d sym downlink OFDM symbols are located after the downlink time slot
  • u sym uplink OFDM symbols are located before the uplink time slot
  • Each OFDM symbol is an X symbol (X represents a flexible symbol).
  • the X symbol may be a downlink symbol, or an uplink symbol, or as a guard interval symbol between downlink and uplink.
  • normal CP Normal CP
  • For Extended CP Extended CP
  • Extended CP Extended CP
  • the TDD-UL-DL-ConfigurationCommon in SIB1 may contain high-level parameter pattern2.
  • Pattern2 pattern1 same form and configuration information pattern2 parameters include: d slots, 2, u slots , 2, d sym, 2, u sym, 2), the same reference subcarrier spacing and pattern1 ⁇ ref.
  • gNB configures at most 4 downlink BWPs and 4 uplink BWPs for each UE.
  • the configuration information of each BWP contains an indication ⁇ of the subcarrier interval in the BWP.
  • gNB ensures that ⁇ ref ⁇ ⁇ (subcarrier spacing of any downlink or uplink BWP of the UE).
  • P step represents the number of uplink subframes available in P serv .
  • Table 14.1.1-1 shows the determination of P step for edge connection transmission modes 3 and 4, as shown in the following table.
  • FIG. 2 shows the basic process of LTE V2X UE direct communication.
  • UE1 sends edge connection 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 time and frequency domain resources, MCS, and so on.
  • the PSSCH carries data (sidelink data: edge connection data) sent by UE1 to UE2 in FIG. 1.
  • the PSCCH occupies one subframe in the time domain and two consecutive PRBs in the frequency domain.
  • a predefined value 510 is used during the initialization of the scrambling sequence.
  • the PSCCH can carry SCI format 1, including at least the time and frequency domain resource information of the PSSCH, such as the frequency domain resource indicator field, indicating that the PSCCH corresponds to the starting sub-channel number of the PSSCH and the number of consecutive sub-channels.
  • the PSSCH also occupies a subframe in the time domain, and is on the same subframe as the corresponding PSCCH frequency multiplexing (FDM).
  • the PSSCH is in the form of a sub-channel in the frequency domain.
  • the sub-channel is n subCHsize consecutive PRBs in the frequency domain.
  • the n subCHsize is configured by the RRC parameter, and the number of sub-channels is indicated by the frequency domain resource indication field of the SCI format 1 .
  • FIG. 3 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).
  • the base station can configure the resource allocation mode of the UE through UE-level RRC signaling SL-V2X-ConfigDedicated, or called the UE's transmission mode.
  • Resource allocation method based on base station scheduling When the RRC signaling SL-V2X-ConfigDedicated is configured as scheduled-r14, it indicates that the UE is configured as a transmission mode based on base station scheduling.
  • the base station configures SL-V-RNTI through RRC, and sends an uplink scheduling grant UL grant to the UE through PDCCH (DCI format 5A).
  • the above uplink scheduling grant includes at least information such as the frequency domain resource indication of the PSSCH.
  • the UE uses the PSSCH frequency domain resource indication field in the uplink scheduling grant as the frequency domain resource scheduling information of the PSSCH in SCI format 1.
  • UE-sensing-based resource allocation method when RRC signaling SL-V2X-ConfigDedicated is configured as ue-Selected-r14, it indicates that the UE is configured as a UE-aware transmission mode.
  • the base station configures the available transmission resource pool, and the UE determines the transmission resources of the PSCCH and PSSCH in the transmission resource pool (resource) according to certain criteria (such as RSRP, etc.), and sends the PSCCH and PSSCH according to the process in FIG. .
  • certain criteria such as RSRP, etc.
  • LTE edge connection defines two discovery models (Discovery Models).
  • Mode A The discovery mode called "I am here". Mode A contains two types of UEs.
  • ⁇ Notification UE (Announcing UE): The UE notifies the discovery message that the neighboring UE can receive and use the above discovery message for edge connection discovery;
  • Monitoring UE The neighboring UE that monitors the discovery message sent by the notification UE.
  • Pattern B The discovery pattern called "Who is there?" Or “Are you there?" Mode B contains two types of UEs.
  • the UE sends a discovery message.
  • the discovery message contains request information.
  • ⁇ Discovered UE (Discoveree UE): The UE receives the request information and replies to the information related to the request message.
  • d slots , u slots , d sym , u sym can be selected from d slots, 2 , u slots, 2 , d sym, 2 , u sym, 2 in sequence. Equivalent replacement, the present invention does not make special restrictions on this.
  • FIG. 4 is a flowchart illustrating a method performed by a user equipment according to Embodiment 1 of the present invention.
  • the steps performed by the user equipment include:
  • the user equipment receives the system information sent by the synchronization reference user equipment.
  • the system information may include configuration information in a slot format.
  • the configuration information may include a reference subcarrier interval (denoted by ⁇ ref ), and / or a period P of configuration information, and / or a number of downlink slots (denoted by d slots ), and / or a number of downlink OFDM symbols ( Denoted by d sym ), and / or the number of upstream slots (denoted by u slots ), and / or the number of upstream OFDM symbols (denoted by u sym ).
  • step S403 the user equipment determines the slot format (slot format) corresponding to the subcarrier interval ⁇ configured by the base station or the user equipment pre-configured parameter according to the obtained configuration information of the slot format.
  • the determination method is as follows:
  • the first are d slots ' downstream slots, and u slots 'upstream slots are located at the end of S' slots.
  • d sym ′ downstream OFDM symbols are located after d slots ′ downstream slots, u sym ′ upstream OFDM symbols are located before u slots ′ upstream slots, and the rest The OFDM symbols are X symbols.
  • the sub-carrier using the reference configuration information acquired in the slot format to the base station is configured ⁇ ref interval value or the relationship between the user equipment [mu] subcarriers preconfigured interval, acquired
  • the d slots , d sym , u slots , and u sym in the configuration information of the received slot format are converted into d ′ slots , d ′ sym , u ′ slots , u sym ′ as the slot format corresponding to the subcarrier interval ⁇ .
  • FIG. 5 schematically shows an example of configuration information of the slot format before conversion acquired from the synchronization reference user equipment, and the lower part of FIG. 5 shows an example of the slot format after conversion at step S403.
  • the user equipment receives the system information sent from the gNB.
  • the system information may include configuration information in a slot format.
  • the configuration information may include a reference subcarrier interval (denoted by ⁇ ref ), a configuration period P, a number of downlink slots (denoted by d slots ), a number of downlink OFDM symbols (denoted by d sym ), and a number of uplink slots ( Denoted by u slots ), the number of uplink OFDM symbols (denoted by u sym ).
  • step S403 of Embodiment 1 or, Where ceil represents the rounding function.
  • the number of converted uplink OFDM symbols is equal to the number of symbols included in each slot, the number of converted uplink OFDM symbols is set to zero as the newly determined number of uplink OFDM symbols, and the converted uplink time The number of slots is increased by one as the newly determined number of upstream slots.
  • FIG. 6 is a flowchart showing a method performed by a user equipment according to Embodiment 2 of the present invention.
  • the steps performed by the user equipment include:
  • step S601 the user equipment acquires system information including time slot format configuration information sent by the base station.
  • the system information includes a reference subcarrier interval (denoted by ⁇ ref ).
  • step S603 the user equipment sends edge connection system information.
  • the system information includes an indication of subcarrier spacing.
  • step S601 of the second embodiment of the present invention another implementation manner is for the user equipment to obtain the edge connection system information containing the slot format configuration information sent by the synchronization reference user equipment.
  • the system information includes a reference subcarrier interval (denoted by ⁇ ref ).
  • the configuration information sent by the base station or the synchronous reference user equipment may include the period P of the configuration information and / or the downlink time under the premise of including the reference subcarrier interval
  • the number of slots d slots , and / or the number of downlink OFDM symbols d sym , and / or the number of uplink slots u slots , and / or the number of uplink OFDM symbols u sym (the above configuration information may be collectively referred to as first configuration information).
  • the edge connection system information includes an indication of subcarrier spacing.
  • the indication may be the minimum subcarrier interval ⁇ min in the pre-configured parameters of the user equipment, or the indication may be 0 (corresponding to the subcarrier interval of 15 kHz), or the reference subcarrier interval in the first configuration information.
  • the edge connection system information may also include the number of downlink slots d ′ slots and / or the number of downlink symbols d ′ sym on the premise that the reference subcarrier interval is included , And / or the number of upstream slots u ′ slots , and / or the number of upstream symbols u ′ sym (may be collectively referred to as second configuration information).
  • the conversion relationship between the second configuration information and the first configuration information is calculated according to the calculation method disclosed in step S403 of Embodiment 1 of the present invention.
  • the value of [mu] is the subcarrier spacing a first configuration information comprises a reference sub-carrier spacing, or, most of the subcarriers in the user device pre-configured parameter interval ⁇ min, or, 0.
  • FIG. 7 is a flowchart showing 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 receives system information sent by the synchronization reference user equipment.
  • the system information may include first configuration information and / or second configuration information in a slot format.
  • the configuration information may include a first configuration period P and / or a second configuration period P 2 , the number of first uplink time slots (represented by u slots ) and / or the number of second uplink time slots (represented by u slots, 2 means).
  • step S703 the user equipment determines the number of available uplink time slots P step in the service period.
  • An implementation manner of the determination method is as follows:
  • P step (u slots + u slots, 2 ) ⁇ P serv / (P + P 2 )
  • Pserv represents the data cycle of V2X periodic services.
  • step S701 of Embodiment 3 of the present invention another possible implementation manner is that the user equipment receives the system information sent from the gNB.
  • the system information may include configuration information in a slot format.
  • the configuration information may include a first configuration period P and / or a second configuration period P 2 , a number of first uplink slots (represented by u slots ) and / or a number of second uplink slots (represented by u slots, 2 means).
  • step S703 of Embodiment 3 of the present invention another possible determination method is as follows:
  • Pserv represents the data cycle of V2X periodic services.
  • FIG. 8 is a flowchart illustrating a method performed by a user equipment according to Embodiment 4 of the present invention.
  • the steps performed by the user equipment include:
  • the user equipment indicates whether to enable the HARQ function.
  • the user equipment may be indicated in the SCI (or PSCCH), or the user equipment is indicated in the system message (or PSBCH) at the edge connection.
  • the user equipment indicates a resource allocation method.
  • the user equipment may be indicated in the SCI (or PSCCH), or the user equipment is indicated in the system message (PSBCH) at the edge connection.
  • PSCH system message
  • one possible implementation manner indicated in the SCI or system message is a 1-bit indication field.
  • 0 means that the HARQ function is enabled
  • 1 means that the HARQ function is disabled, and vice versa.
  • Another possible implementation manner indicated in the SCI or system message is a bitmap indication. Each bit of the bitmap corresponds to a receiving UE. Setting this bit to 0 indicates that the HARQ function of the receiving UE is enabled, and setting to 1 indicates that the HARQ function of the receiving UE is disabled, and vice versa.
  • one possible implementation manner indicated in the SCI or system message is a 1-bit indication field.
  • 0 represents a resource allocation method based on base station scheduling
  • 1 represents a resource allocation method based on user equipment perception, and vice versa.
  • step S801 and step S803 of Embodiment 4 of the present invention another implementation manner is that the user equipment indicates in the discovery message (Discovery Message) whether to enable the HARQ function and / or the resource allocation manner of the user equipment.
  • the discovery message may be carried in PSDCH, or PSCCH, or PSSCH, or PSBCH.
  • another implementation manner is that during the connection setup (connection setup or establishment), the user equipment indicates or coordinates (coordinate or coordinate) through higher layer signaling (RRC signaling, or NAS signaling, or AS signaling). negotiate) whether to enable the HARQ function and / or the resource allocation mode of the user equipment.
  • RRC signaling Radio Resource Control
  • NAS signaling or AS signaling
  • the user equipment UE80 includes a processor 901 and a memory 902.
  • the processor 901 may include, for example, a microprocessor, a microcontroller, an embedded processor, and the like.
  • the memory 902 may include, for example, volatile memory (such as random access memory RAM), hard disk drive (HDD), non-volatile memory (such as flash memory), or other memory.
  • the memory 902 stores program instructions. When the instruction is executed by the processor 901, the above method executed by the user equipment described in detail in the present invention may be executed.
  • the method of the present invention and related equipment have been described above in conjunction with the 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 conflict.
  • the method of the present invention is not limited to the steps and sequence shown above.
  • the network node and the user equipment shown above may include more modules, for example, they may also include modules that can be developed or developed in the future and can be used for base stations, MMEs, or UEs.
  • the various identifications shown above are only exemplary and not limiting, and the present invention is not limited to specific cells as examples of these identifications. Many changes and modifications can be made by those skilled in the art based on the teachings of the illustrated embodiments.
  • the above-described embodiments of the present invention may be implemented by software, hardware, or a combination of both software and hardware.
  • various components inside the base station and the 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 processing Device, application specific integrated circuit (ASIC), field programmable gate array (FPGA), programmable logic device (CPLD), etc.
  • DSP digital signal processing
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • CPLD programmable logic device
  • base station may refer to a mobile communication data and control switching center with a large transmission power and a wide coverage area, including functions such as resource allocation scheduling, data reception and transmission, and the like.
  • User equipment may refer to user mobile terminals, including, for example, mobile phones, notebooks, and other terminal devices that can communicate wirelessly with base stations or micro base stations.
  • the embodiments of the invention disclosed herein can be implemented on a computer program product.
  • the computer program product is a product having a computer-readable medium encoded with computer program logic, and when executed on a computing device, the computer program logic provides related operations to achieve The above technical solution of the present invention.
  • the computer program logic When executed on at least one processor of the computing system, the computer program logic causes the processor to perform the operations (methods) described in the embodiments of the present invention.
  • Such an arrangement of the 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 (eg CD-ROM), floppy disk or hard disk, or such as one or more Firmware, microcode, or other media on a ROM or RAM, or PROM chip, or downloadable software images, shared databases, etc. in one or more modules.
  • Software or firmware or such a configuration may 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 the terminal device used in each of the foregoing embodiments may be implemented or executed by a circuit, and the circuit is usually one or more integrated circuits.
  • Circuits designed to perform 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 Programming logic devices, discrete gate or transistor logic, or discrete hardware components, or any combination of the above devices.
  • DSPs digital signal processors
  • ASICs application specific integrated circuits
  • FPGAs field programmable gate arrays
  • a general-purpose processor may be a microprocessor, or the processor may be an existing processor, controller, microcontroller, or 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 can also use integrated circuits obtained using the advanced technologies.

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

Abstract

La présente invention concerne un procédé exécuté par un équipement d'utilisateur, consistant à : obtenir des informations de configuration d'un format d'intervalle de temps à partir d'un autre dispositif différent de l'équipement d'utilisateur ; et, selon les informations de configuration du format d'intervalle de temps obtenues, déterminer un format d'intervalle de temps correspondant à un intervalle de sous-porteuse configuré dans une station de base ou préconfiguré dans l'équipement d'utilisateur.
PCT/CN2019/114318 2018-11-01 2019-10-30 Procédé exécuté par un équipement d'utilisateur et équipement d'utilisateur WO2020088513A1 (fr)

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