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WO2024093650A1 - Procédé et appareil d'indication de ressources - Google Patents

Procédé et appareil d'indication de ressources Download PDF

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Publication number
WO2024093650A1
WO2024093650A1 PCT/CN2023/124548 CN2023124548W WO2024093650A1 WO 2024093650 A1 WO2024093650 A1 WO 2024093650A1 CN 2023124548 W CN2023124548 W CN 2023124548W WO 2024093650 A1 WO2024093650 A1 WO 2024093650A1
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WO
WIPO (PCT)
Prior art keywords
time slot
terminal
reference signal
sci
pssch
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.)
Ceased
Application number
PCT/CN2023/124548
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English (en)
Chinese (zh)
Other versions
WO2024093650A9 (fr
Inventor
徐姣姣
苏宏家
卢磊
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.)
Huawei Technologies Co Ltd
Original Assignee
Huawei Technologies Co Ltd
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 Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Publication of WO2024093650A1 publication Critical patent/WO2024093650A1/fr
Publication of WO2024093650A9 publication Critical patent/WO2024093650A9/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • 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
    • H04L5/0053—Allocation of signalling, i.e. of overhead other than pilot signals
    • 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
    • H04L5/0091—Signalling for the administration of the divided path, e.g. signalling of configuration information
    • H04L5/0094—Indication of how sub-channels of the path are allocated
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [TPC]
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [TPC]
    • H04W52/38—TPC being performed in particular situations
    • 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

Definitions

  • the present application relates to the field of wireless communication technology, and in particular to a resource indication method and device.
  • C-V2X Cellular vehicle-to-everything
  • Beam management is an important technology proposed by the fifth generation wireless communication system ( 5th generation, 5G) new radio (new radio, NR) for the second frequency range (frequency range 2, FR2). It is the process by which base stations and terminals obtain and maintain beam sets for sending and receiving, and then achieve high-gain communication with reasonable beam pairs.
  • 5G fifth generation wireless communication system
  • NR new radio
  • the beam management process of FR2 is designed for base stations and terminals, that is, the base station first performs coarse beam scanning and the terminal receives.
  • SL sidelink
  • both the transmitter and the receiver are terminals, and the beam management process in 5G NR is no longer applicable, and there is no standard support for related technical solutions.
  • the present application provides a resource indication method and apparatus for indicating time-frequency resources for transmitting a sidelink reference signal in a SL system.
  • a resource indication method is provided.
  • the method can be implemented by a second terminal, or by a chip/chip system.
  • the second terminal sends a physical sidelink control channel (PSCCH) to the first terminal.
  • PSCCH carries sidelink control information (SCI), which is used to indicate the time-frequency resources of a physical sidelink shared channel (PSSCH).
  • SCI sidelink control information
  • PSSCH physical sidelink shared channel
  • the second terminal sends a sidelink reference signal and PSSCH to the first terminal.
  • PSSCH only carries a media access control (MAC) control element (CE).
  • MAC media access control
  • CE media access control element
  • the sidelink reference signal is used for beam training.
  • PSCCH, PSSCH and sidelink reference signal are sent in the same time slot.
  • the sidelink reference signal includes a sidelink channel state control information reference signal (SL CSI-RS).
  • SL CSI-RS sidelink channel state control information reference signal
  • the separation structure of the side reference signal and the PSSCH associated data is considered, and only the time slot structure of the MAC CE and the side reference signal is filled in the PSSCH.
  • the above time slot structure can be used for the transmission beam training based on the side reference signal in the FR2 frequency band, which ensures the separation of the side reference signal and the associated data in the PSSCH, while avoiding the transmission of a standalone side reference signal.
  • a time domain resource set of a sidelink reference signal is selected, and intervals between two adjacent time slots in the time domain resource set are the same.
  • the second terminal selects a uniformly distributed time domain resource set to transmit the sidelink reference signal, and the sidelink reference signal can be used for beam training to implement beam training of the SL system in the FR2 frequency band.
  • the SCI indicates a time domain resource set of a sidelink reference signal, and the intervals between two adjacent time slots in the time domain resource set are the same.
  • the first terminal can receive the side reference signal sent on the time domain resource set.
  • the time domain resource set of the reference signal through SCI, other terminals in the SL system can perceive and avoid the time slot resources included in the time domain resource set.
  • the SCI includes period indication information, and the period indication information is used to indicate the period T.
  • the periodic time slot is indicated by the periodic indication information for transmitting the sideline reference signal, so as to realize the beam training of the SL system in the FR2 frequency band.
  • the periodic time slot indicated by the periodic indication information can also allow other terminals in the SL system to After sensing, the terminal avoids the periodic time slot resources.
  • the value of T is configured by a network terminal, pre-configured, configured by the first terminal to the second terminal, or determined by the second terminal.
  • SCI indicates time domain resource information of a sidelink reference signal
  • the time domain resource information includes Q time slot offsets tq , where Q is an integer greater than or equal to 1, and q is an integer ranging from 1 to Q.
  • the time domain resource set of the sidelink reference signal includes time slot n and time slot n+ tq .
  • n is the index of the transmission time slot of the PSCCH, and tq is greater than or equal to 1.
  • the qth time slot offset tq among the Q time slot offsets is q times the 1st time slot offset t1 among the Q time slot offsets.
  • the time slot offset tq ' indicated by the SCI sent in time slot n+ t1 is the same as the time slot offset tq .
  • a resource indication method is provided.
  • the method may be implemented by a second terminal, or by a chip/chip system.
  • the second terminal sends a first PSCCH to the first terminal.
  • the first PSCCH carries a first SCI, and the first SCI is used to indicate the time-frequency resources of the first PSSCH.
  • the second terminal sends a first sideline reference signal and a first PSSCH to the first terminal.
  • the first sideline reference signal is used for beam training, and the first PSSCH only carries the first MAC CE.
  • the first PSCCH, the first PSSCH and the first sideline reference signal are sent in the same time slot.
  • the second terminal sends a second PSCCH to the first terminal.
  • the second PSCCH carries a second SCI, and the second SCI is used to indicate the time-frequency resources of the second PSSCH.
  • the second terminal sends a second sideline reference signal and a second PSSCH to the first terminal.
  • the second sideline reference signal is used for beam training, and the second PSSCH carries a second MAC CE and a MAC protocol data unit (PDU).
  • the second PSCCH, the second PSSCH and the second sideline reference signal are sent in the same time slot.
  • the resource selection of the side reference signal in the SL system on the FR2 frequency band is supported for the beam training process.
  • SCI can provide resource information of the side reference signal, which is used for other terminals in the SL system to exclude the resources indicated by SCI after perception to avoid collision.
  • a first time domain resource set of the first sidelink reference signal and the second sidelink reference signal is selected, and intervals between two adjacent time slots in time slots included in the first time domain resource set are the same.
  • the second terminal selects a uniformly distributed time domain resource set to transmit the sidelink reference signal, and the sidelink reference signal can be used for beam training to implement beam training of the SL system in the FR2 frequency band.
  • the first SCI and the second SCI indicate a first time domain resource set of the first sideline reference signal and the second sideline reference signal, and intervals between two adjacent time slots in the time slots included in the first time domain resource set are the same.
  • the first terminal can receive the side reference signal sent on the time domain resource set.
  • the time domain resource set of the reference signal through SCI, other terminals in the SL system can perceive and avoid the time slots included in the time domain resource set.
  • the first SCI indicates a second time domain resource set of a first side reference signal
  • the second SCI indicates a third time domain resource set of a second side reference signal.
  • the interval between two adjacent time slots in the time slots included in the union of the second time domain resource set and the third time domain resource set is the same.
  • the union of the second time domain resource set and the third time domain resource set can be understood as the above-mentioned first time domain resource set.
  • the second SCI includes period indication information, and the period indication information is used to indicate the period T.
  • the periodic time slot is indicated by the periodic indication information for transmitting the sidelink reference signal to implement the beam training of the SL system on the FR2 frequency band.
  • the periodic time slot is indicated by the periodic indication information, so that other terminals in the SL system can avoid the periodic time slot after sensing it.
  • the value of T is configured by a network terminal, pre-configured, configured by the first terminal to the second terminal, or determined by the second terminal.
  • the first SCI indicates time domain resource information of the first sidelink reference signal
  • the time domain resource information includes Q time slot offsets tq , where Q is an integer greater than or equal to 1, and q is an integer from 1 to Q.
  • the second time domain resource set of the first sidelink reference signal includes time slot n and time slot n+ tq .
  • n is the index of the transmission time slot of the PSCCH, and tq is greater than or equal to 1.
  • Q is greater than 1
  • the interval between two adjacent time slots in the set consisting of time slot n, time slot n+ tq , and time slot n+k*T is the same.
  • Q is equal to 1
  • the interval between two adjacent time slots in the set consisting of time slot n, time slot n+ tq , and time slot n+k*T is the same.
  • a resource indication method is provided.
  • the method can be implemented by a first terminal, or by a chip/chip system.
  • the first terminal receives a PSCCH from a second terminal.
  • the PSCCH carries the SCI, and the SCI is used to indicate the time-frequency resources of the PSSCH.
  • a side reference signal and a PSSCH are received from the second terminal.
  • the PSSCH only carries the MAC CE, and the side reference signal is used for beam training.
  • the PSCCH, PSSCH and the side reference signal are sent in the same time slot.
  • the SCI indicates a time domain resource set of a sidelink reference signal, and the intervals between two adjacent time slots in the time domain resource set are the same.
  • the SCI includes period indication information, and the period indication information is used to indicate the period T.
  • the value of T is configured by a network terminal, pre-configured, configured by the first terminal to the second terminal, or determined by the second terminal.
  • SCI indicates time domain resource information of a sidelink reference signal
  • the time domain resource information includes Q time slot offsets tq , where Q is an integer greater than or equal to 1, and q is an integer ranging from 1 to Q.
  • the time domain resource set of the sidelink reference signal includes time slot n and time slot n+ tq .
  • n is the index of the transmission time slot of the PSCCH, and tq is greater than or equal to 1.
  • the qth time slot offset tq among the Q time slot offsets is q times the 1st time slot offset t1 among the Q time slot offsets.
  • the time slot offset tq ' indicated by the SCI sent in time slot n+ t1 is the same as the time slot offset tq .
  • a resource indication method is provided.
  • the method can be implemented by a first terminal, or by a chip/chip system.
  • the first terminal receives a first PSCCH from a second terminal.
  • the first PSCCH carries a first SCI, and the first SCI is used to indicate the time-frequency resources of the first PSSCH.
  • a first sideline reference signal and a first PSSCH are received from the second terminal, the first sideline reference signal is used for beam training, and the first PSSCH only carries a first MAC CE.
  • the first PSCCH, the first PSSCH and the first sideline reference signal are sent in the same time slot.
  • the first terminal receives a second PSCCH from the second terminal.
  • the second PSCCH carries a second SCI, and the second SCI is used to indicate the time-frequency resources of the second PSSCH.
  • the first terminal receives a second sideline reference signal and a second PSSCH from the second terminal, the second sideline reference signal is used for beam training, and the second PSSCH carries a second MAC CE and a MAC PDU.
  • the second PSCCH, the second PSSCH and the second sideline reference signal are sent in the same time slot.
  • the first SCI and the second SCI indicate a first time domain resource set of the first sideline reference signal and the second sideline reference signal, and intervals between two adjacent time slots in the time slots included in the first time domain resource set are the same.
  • the first SCI indicates a second time domain resource set of the first sideline reference signal
  • the second SCI indicates a third time domain resource set of the second sideline reference signal.
  • the interval between two adjacent time slots in the time slots included in the union of the second time domain resource set and the third time domain resource set is the same.
  • the second SCI includes period indication information, and the period indication information is used to indicate the period T.
  • the value of T is configured by a network terminal, pre-configured, configured by the first terminal to the second terminal, or determined by the second terminal.
  • the first SCI indicates the time domain resource information of the first sidelink reference signal
  • the time domain resource information includes Q time slot offsets tq , where Q is an integer greater than or equal to 1, and q is an integer ranging from 1 to Q.
  • the second time domain resource set of the first sidelink reference signal includes time slot n and time slot n+ tq .
  • n is the index of the transmission time slot of the PSCCH, and tq is greater than or equal to 1.
  • Q is greater than 1, in the set consisting of time slot n, time slot n+ tq, and time slot n+k*T
  • the interval between two adjacent time slots is the same.
  • Q is equal to 1 in the set consisting of time slot n, time slot n+ tq , and time slot n+k*T, the interval between two adjacent time slots is the same.
  • a communication device comprising: a processing unit and a transceiver unit.
  • the processing unit is used to generate SCI.
  • the transceiver unit is used to send PSCCH to the first terminal.
  • PSCCH carries SCI
  • SCI is used to indicate PSSCH time-frequency resources.
  • the transceiver unit is also used to send a sidelink reference signal and PSSCH to the first terminal.
  • PSSCH only carries MAC CE.
  • the sidelink reference signal is used for beam training. PSCCH, PSSCH and sidelink reference signal are sent in the same time slot.
  • the processing unit is further configured to select a time domain resource set for a sidelink reference signal, wherein intervals between two adjacent time slots in the time domain resource set are the same.
  • the SCI indicates a time domain resource set of a sidelink reference signal, and the intervals between two adjacent time slots in the time domain resource set are the same.
  • the SCI includes period indication information, and the period indication information is used to indicate the period T.
  • the value of T is configured by a network terminal, pre-configured, configured by the first terminal to the second terminal, or determined by the second terminal.
  • SCI indicates time domain resource information of a sidelink reference signal
  • the time domain resource information includes Q time slot offsets tq , where Q is an integer greater than or equal to 1, and q is an integer ranging from 1 to Q.
  • the time domain resource set of the sidelink reference signal includes time slot n and time slot n+ tq .
  • n is the index of the transmission time slot of the PSCCH, and tq is greater than or equal to 1.
  • the qth time slot offset tq among the Q time slot offsets is q times the 1st time slot offset t1 among the Q time slot offsets.
  • the time slot offset tq ' indicated by the SCI sent in time slot n+ t1 is the same as the time slot offset tq .
  • a communication device comprising: a processing unit and a transceiver unit.
  • the processing unit is used to generate a first SCI and a second SCI.
  • the transceiver unit is used to send a first PSCCH to the first terminal.
  • the first PSCCH carries a first SCI
  • the first SCI is used to indicate the time-frequency resources of the first PSSCH.
  • the transceiver unit is also used to send a first sideline reference signal and a first PSSCH to the first terminal.
  • the first sideline reference signal is used for beam training, and the first PSSCH only carries a first MAC CE.
  • the first PSCCH, the first PSSCH and the first sideline reference signal are sent in the same time slot.
  • the transceiver unit is also used to send a second PSCCH to the first terminal.
  • the second PSCCH carries a second SCI, and the second SCI is used to indicate the time-frequency resources of the second PSSCH.
  • the transceiver unit is also used to send a second sideline reference signal and a second PSSCH to the first terminal.
  • the second sideline reference signal is used for beam training, and the second PSSCH carries a second MAC CE and a MAC PDU.
  • the second PSCCH, the second PSSCH and the second sideline reference signal are sent in the same time slot.
  • the processing unit is further configured to select a first time domain resource set for the first sidelink reference signal and the second sidelink reference signal, wherein intervals between two adjacent time slots in the time slots included in the first time domain resource set are the same.
  • the first SCI and the second SCI indicate a first time domain resource set of the first sideline reference signal and the second sideline reference signal, and intervals between two adjacent time slots in the time slots included in the first time domain resource set are the same.
  • the first SCI indicates a second time domain resource set of a first side reference signal
  • the second SCI indicates a third time domain resource set of a second side reference signal.
  • the interval between two adjacent time slots in the time slots included in the union of the second time domain resource set and the third time domain resource set is the same.
  • the union of the second time domain resource set and the third time domain resource set can be understood as the above-mentioned first time domain resource set.
  • the second SCI includes period indication information, and the period indication information is used to indicate the period T.
  • the value of T is configured by a network terminal, pre-configured, configured by the first terminal to the second terminal, or determined by the second terminal.
  • the first SCI indicates the time domain resource information of the first sidelink reference signal
  • the time domain resource information includes Q time slot offsets tq , where Q is an integer greater than or equal to 1, and q is an integer ranging from 1 to Q.
  • the second time domain resource set of the first sidelink reference signal includes time slot n and time slot n+ tq .
  • n is the index of the transmission time slot of the PSCCH, and tq is greater than or equal to 1.
  • Q is greater than 1, in the set consisting of time slot n, time slot n+ tq, and time slot n+k*T
  • the interval between two adjacent time slots is the same.
  • Q is equal to 1 in the set consisting of time slot n, time slot n+ tq , and time slot n+k*T, the interval between two adjacent time slots is the same.
  • a communication device comprising: a processing unit and a transceiver unit.
  • the transceiver unit is used to receive the PSCCH from the second terminal.
  • the PSCCH carries the SCI, and the SCI is used to indicate the time-frequency resources of the PSSCH.
  • the transceiver unit is also used to receive the side reference signal and the PSSCH from the second terminal. Among them, the PSSCH only carries the MAC CE, and the side reference signal is used for beam training.
  • the PSCCH, PSSCH and the side reference signal are sent in the same time slot.
  • the processing unit is used to determine the time-frequency resources of the PSSCH.
  • the SCI indicates a time domain resource set of a sidelink reference signal, and the intervals between two adjacent time slots in the time domain resource set are the same.
  • the SCI includes period indication information, and the period indication information is used to indicate the period T.
  • the value of T is configured by a network terminal, pre-configured, configured by the first terminal to the second terminal, or determined by the second terminal.
  • SCI indicates time domain resource information of a sidelink reference signal
  • the time domain resource information includes Q time slot offsets tq , where Q is an integer greater than or equal to 1, and q is an integer ranging from 1 to Q.
  • the time domain resource set of the sidelink reference signal includes time slot n and time slot n+ tq .
  • n is the index of the transmission time slot of the PSCCH, and tq is greater than or equal to 1.
  • the qth time slot offset tq among the Q time slot offsets is q times the 1st time slot offset t1 among the Q time slot offsets.
  • the time slot offset tq ' indicated by the SCI sent in time slot n+ t1 is the same as the time slot offset tq .
  • a communication device comprising: a processing unit and a transceiver unit.
  • the transceiver unit is used to receive a first PSCCH from a second terminal.
  • the first PSCCH carries a first SCI, and the first SCI is used to indicate the time-frequency resources of the first PSSCH.
  • the transceiver unit is also used to receive a first sideline reference signal and a first PSSCH from the second terminal.
  • the first sideline reference signal is used for beam training, and the first PSSCH only carries a first MAC CE.
  • the first PSCCH, the first PSSCH and the first sideline reference signal are sent in the same time slot.
  • the transceiver unit is also used to receive a second PSCCH from the second terminal.
  • the second PSCCH carries a second SCI, and the second SCI is used to indicate the time-frequency resources of the second PSSCH.
  • the transceiver unit is also used to receive a second sideline reference signal and a second PSSCH from the second terminal.
  • the second sideline reference signal is used for beam training, and the second PSSCH carries a second MAC CE and a MAC PDU.
  • the second PSCCH, the second PSSCH and the second sideline reference signal are sent in the same time slot.
  • the processing unit is used to determine the time-frequency resources of the first PSSCH and the time-frequency resources of the second PSSCH.
  • the first SCI and the second SCI indicate a first time domain resource set of the first sideline reference signal and the second sideline reference signal, and intervals between two adjacent time slots in the time slots included in the first time domain resource set are the same.
  • the first SCI indicates a second time domain resource set of the first sideline reference signal
  • the second SCI indicates a third time domain resource set of the second sideline reference signal.
  • the interval between two adjacent time slots in the time slots included in the union of the second time domain resource set and the third time domain resource set is the same.
  • the second SCI includes period indication information, and the period indication information is used to indicate the period T.
  • the value of T is configured by a network terminal, pre-configured, configured by the first terminal to the second terminal, or determined by the second terminal.
  • the first SCI indicates the time domain resource information of the first sidelink reference signal
  • the time domain resource information includes Q time slot offsets tq , where Q is an integer greater than or equal to 1, and q is an integer ranging from 1 to Q.
  • the second time domain resource set of the first sidelink reference signal includes time slot n and time slot n+ tq .
  • n is the index of the transmission time slot of the PSCCH, and tq is greater than or equal to 1.
  • Q is greater than 1, in the set consisting of time slot n, time slot n+ tq, and time slot n+k*T
  • the interval between two adjacent time slots is the same.
  • Q is equal to 1 in the set consisting of time slot n, time slot n+ tq , and time slot n+k*T, the interval between two adjacent time slots is the same.
  • a communication device may be a communication device in any possible implementation of the fifth to eighth aspects of the above embodiments, or a chip set in a communication device in any aspect of the fifth to eighth aspects.
  • the communication device includes a communication interface and a processor, and optionally, also includes a memory.
  • the memory is used to store computer programs, instructions, or data.
  • the processor is coupled to the memory and the communication interface.
  • the communication device When the processor reads the computer program, instructions, or data, the communication device The method is configured to execute the method executed by the second terminal in any possible implementation manner of the first aspect above, or the communication device is configured to execute the method executed by the second terminal in any possible implementation manner of the second aspect above, or the communication device is configured to execute the method executed by the first terminal in any possible implementation manner of the third aspect above, or the communication device is configured to execute the method executed by the first terminal in any possible implementation manner of the fourth aspect above.
  • the communication interface can be implemented by an antenna, a feeder, a codec, etc. in the communication device, or, if the communication device is a chip provided in a network device or a terminal device, the communication interface can be an input/output interface of the chip, such as an input/output pin, etc.
  • the communication device may also include a transceiver for the communication device to communicate with other devices.
  • an embodiment of the present application provides a chip system, which includes a processor and may also include a memory, for implementing the method executed by the first terminal or the second terminal in any possible implementation of the first to fourth aspects.
  • the chip system also includes a memory for storing program instructions and/or data.
  • the chip system may be composed of a chip, or may include a chip and other discrete devices.
  • the present application provides a computer-readable storage medium storing a computer program or instructions, which, when executed, implements the method performed by the first terminal or the second terminal in the above aspects.
  • a computer program product comprising: computer program code or instructions, when the computer program code or instructions are executed, the method performed by the first terminal or the second terminal in the above aspects is executed.
  • a communication device in a thirteenth aspect, includes a unit or module for executing the above-mentioned methods.
  • a chip system comprising a logic circuit and an input/output interface.
  • the logic circuit is used to execute the method executed by the first terminal or the second terminal.
  • the input/output interface is used to communicate with other devices.
  • the beneficial effects of the third to fourteenth aspects and their implementations can refer to the description of the beneficial effects of the methods of the first and second aspects and their implementations.
  • FIG1A is a schematic diagram of a communication system provided in an embodiment of the present application.
  • FIG1B is a schematic diagram of another communication system provided in an embodiment of the present application.
  • FIG2 is a schematic diagram of a V2X scenario
  • FIG3 is a schematic diagram of a V2V scenario
  • FIG4 is a schematic diagram of a physical time slot and a logical time slot
  • FIG5 is a schematic diagram of a PSCCH resource location
  • FIG6 is a schematic diagram of a resource selection method
  • FIG7 is a schematic diagram of a time slot structure
  • FIG8 is a schematic diagram of a beam of a terminal provided in an embodiment of the present application.
  • FIG9 is a schematic diagram of a time slot structure provided in an embodiment of the present application.
  • FIG10 is an exemplary flow chart of a resource indication method provided in an embodiment of the present application.
  • FIG11 is a schematic diagram of a time slot of a side reference signal provided in an embodiment of the present application.
  • FIG12 is a schematic diagram of a time slot of another side reference signal provided in an embodiment of the present application.
  • FIG13 is a schematic diagram of a time slot of another side reference signal provided in an embodiment of the present application.
  • FIG14 is a schematic diagram of another time slot structure provided in an embodiment of the present application.
  • FIG15 is an exemplary flow chart of a resource indication method provided in an embodiment of the present application.
  • FIG16 is a schematic diagram of a time slot of another side reference signal provided in an embodiment of the present application.
  • FIG17 is an exemplary flow chart of a resource indication method provided in an embodiment of the present application.
  • FIG18 is a schematic diagram of a time slot of another side reference signal provided in an embodiment of the present application.
  • FIG19 is a schematic diagram of a communication device provided in an embodiment of the present application.
  • FIG20 is a schematic diagram of another communication device provided in an embodiment of the present application.
  • FIG21 is a schematic diagram of another communication device provided in an embodiment of the present application.
  • Figure 22 is a schematic diagram of another communication device provided in an embodiment of the present application.
  • the communication system may include a terminal device 101 and a terminal device 102.
  • the terminal device 101 and the terminal device 102 may communicate via a side link. It is understandable that the communication system may further include more terminal devices, which are not shown in FIG. 1A .
  • the communication system may further include a network device.
  • the communication system may include a network device 103 .
  • the network device 103 may communicate with the terminal device 101 , and the network device 103 may also communicate with the terminal device 102 .
  • the terminal device involved in the present application includes a device that provides voice and/or data signal connectivity to a user, specifically, includes a device that provides voice to a user, or includes a device that provides data signal connectivity to a user, or includes a device that provides voice and data signal connectivity to a user.
  • a device that provides voice and/or data signal connectivity to a user specifically, includes a device that provides voice to a user, or includes a device that provides data signal connectivity to a user, or includes a device that provides voice and data signal connectivity to a user.
  • it may include a handheld device with a wireless connection function, or a processing device connected to a wireless modem.
  • the terminal device may include user equipment (UE), wireless terminal equipment, mobile terminal equipment, device-to-device (D2D) terminal equipment, V2X terminal equipment, machine-to-machine/machine-type communications (M2M/MTC) terminal equipment, Internet of Things (IoT) terminal equipment, subscriber unit, subscriber station, mobile station, remote station, access point (AP), remote terminal equipment, access terminal equipment, user terminal equipment, user agent, or user equipment, satellite, drone, balloon or aircraft, etc.
  • UE user equipment
  • D2D device-to-device
  • M2M/MTC machine-to-machine/machine-type communications
  • IoT Internet of Things
  • subscriber unit subscriber station
  • mobile station remote station
  • access point AP
  • remote terminal equipment access terminal equipment
  • user terminal equipment user agent
  • satellite drone, balloon or aircraft
  • it may include a mobile phone (or "cellular" phone), a computer with a mobile terminal device, a portable, pocket-sized, handheld, or computer-built-in mobile device, etc
  • PCS personal communication service
  • SIP session initiation protocol
  • WLL wireless local loop
  • PDA personal digital assistants
  • the terminal device can also be a wearable device.
  • Wearable devices can also be called wearable smart devices or smart wearable devices, etc., which are the general term for wearable devices that are intelligently designed and developed for daily wear using wearable technology.
  • the various terminal devices introduced above, if located on a vehicle (for example, placed in a vehicle or installed in a vehicle), can be considered as vehicle-mounted terminal devices, and vehicle-mounted terminal devices are also called on-board units (OBU).
  • OEM on-board units
  • the network devices involved in the present application include, for example, access network (AN) devices, such as base stations (e.g., access points), which may refer to devices in the access network that communicate with wireless terminal devices through one or more cells at the air interface, or, for example, a network device in vehicle-to-everything (V2X) technology is a road side unit (RSU).
  • AN access network
  • base stations e.g., access points
  • V2X vehicle-to-everything
  • RSU road side unit
  • the network device may include an evolved base station (NodeB or eNB or e-NodeB, evolutional Node B) in a long term evolution (LTE) system or long term evolution-advanced (LTE-A), or may include an evolved packet core network (EPC), the 5th generation (5G), a next generation node B (gNB) in a new radio (NR) system (also referred to as an NR system), or may include a centralized unit (CU) and a distributed unit (DU) in a cloud radio access network (Cloud RAN) system, a satellite, a drone, a balloon or an airplane, etc., and the embodiments of the present application are not limited.
  • NodeB or eNB or e-NodeB, evolutional Node B in a long term evolution (LTE) system or long term evolution-advanced (LTE-A)
  • EPC evolved packet core network
  • 5G 5th generation
  • gNB next generation node B
  • NR new radio
  • Wireless communications have undergone a technological evolution from the first generation of analog communication systems to the new 5G NR systems.
  • beamforming based on multiple input multiple output (MIMO) is an important aspect.
  • Beamforming can be regarded as a spatial filtering process. Its technical principle is to limit the transmission or reception of signals to a certain angle range, thereby increasing gain and reducing interference.
  • Beamforming has already appeared in the second generation of mobile communication systems ( 2nd generation, 2G), when it was achieved by selecting different transmitting or receiving antennas.
  • the third generation of mobile communication systems ( 3rd generation, 3G) and later communication systems tend to use phased arrays to achieve beamforming.
  • BM beam management
  • Beam management is an important technology proposed by 5G NR for FR2, including two important functions: beam training and beam failure recovery.
  • Beam training includes transmit beam training and receive beam training, which can be divided into three steps. The operations of each step are summarized as follows:
  • the base station sends a reference signal (RS) based on a set of transmit beams.
  • RS reference signal
  • the transmit beam set may include one or more transmit beams.
  • One transmit beam may correspond to one transmit direction, and multiple different transmit beams may correspond to different transmit directions.
  • the terminal may receive the RS through the receive beam, measure and feedback the RS, and select the transmit beam of the base station and the receive beam of the terminal.
  • S2 Based on S1, the base station sends RS based on a smaller set of transmit beams.
  • a smaller transmit beam set may be a subset of the transmit beam set in S1, or may be a narrower beam set corresponding to the direction of one or more transmit beams included in the transmit beam set in S1.
  • the terminal may receive the RS through the receive beam, measure and provide feedback on the RS, and improve the transmit beam of the base station.
  • S3 The base station sends RS using one transmit beam.
  • One of the transmission beams in S3 may be the transmission beam of the base station improved by the terminal in S2.
  • the terminal receives RSs using different reception beams, measures and feeds back the RSs, and improves the reception beam of the terminal.
  • the beam training of 5G NR downlink can be carried out.
  • S1 and S2 are the processes of the base station to perform the transmission beam training.
  • RS can be a channel state information reference signal (CSI-RS).
  • the base station will configure several beam directions, each beam direction corresponds to a CSI-RS resource and the time-frequency resources that the terminal should use when providing feedback.
  • the base station periodically or non-periodically sends CSI-RS to each direction in turn in a scanning manner.
  • the terminal measures the received power (reference signal received power, RSRP) of the CSI-RS and obtains the channel state information reference signal resource indicator (CSI-RS resource indicator, CRI) of the CSI-RS. After obtaining the RSRP, the terminal selects one or several RSRPs and the corresponding CRI and feeds them back to the base station.
  • the base station uses the feedback information to determine the transmit beam to be used.
  • the uplink beam training also uses a similar process, but the reference signals used are different.
  • C-V2X is a V2X communication technology developed based on cellular systems. It utilizes and enhances current cellular network functions and elements to achieve low-latency and high-reliability communication between various nodes in the vehicle network.
  • V2X communication technology can include vehicle-to-vehicle communication (V2V), vehicle-to-pedestrian communication (V2P), vehicle-to-infrastructure communication (V2I), and vehicle-to-network communication (V2N).
  • V2V vehicle-to-vehicle communication
  • V2P vehicle-to-pedestrian communication
  • V2I vehicle-to-infrastructure communication
  • V2N vehicle-to-network communication
  • C-V2X evolves from LTE-V2X to NR-V2X.
  • V2X communication has great potential to reduce vehicle collision accidents, thereby reducing the corresponding number of casualties.
  • the advantages of V2X are not limited to improving safety.
  • Vehicles that can perform V2X communication can help better manage traffic, further promote green transportation and lower energy consumption.
  • Intelligent transportation system (ITS) is an application that combines V2X.
  • vehicle users vehicle UE, V-UE
  • V-UE vehicle users
  • V-UE vehicle UE
  • 5G NR V2X can support lower transmission latency, more reliable communication transmission, higher throughput, better user experience, and meet the needs of a wider range of application scenarios.
  • V2V is a special case of V2X, which focuses on SL communication between vehicles.
  • V2V communication vehicles on the road can obtain driving information, sensor information, etc. of other vehicles in real time, which plays an important role in enabling autonomous driving.
  • the head vehicle sends vehicle control information to the formation in a V2V manner to enable subsequent vehicles to achieve unmanned driving.
  • V2V For extended sensors, after a vehicle senses other vehicles, it informs other vehicles of this sensor information through V2V, solving the problem of inaccurate environmental perception caused by the limited sensor capabilities of the vehicle itself.
  • V2V communication technology can be extended to D2D communication in any system.
  • problems in V2V communication In order to promote the long-term development of V2V and V2X technologies, beam management in V2V SL is an important aspect that needs to be solved urgently.
  • the R16 standard defines two resource allocation modes for SL communication: mode 1 and mode 2.
  • mode 1 the base station allocates transmission resources to V2X through the Uu (UTRAN-to-UE) air interface, so the terminals in mode 1 must be within the network coverage.
  • the spectrum resources of SL can be shared with uplink communication resources.
  • mode 1 and mode 2 can be allocated to different resource pools or share resource pools. Resource pool sharing can improve resource utilization efficiency, but it is also easy to cause conflicts between mode 1 and mode 2. Therefore, the terminal in mode 1 will notify the terminal in mode 2 of the resources allocated for its future transmission.
  • the terminal can obtain SL resource pool configuration information and/or SL bandwidth part (BWP) configuration information by receiving the system information block (SIB) of the network device, cell-level (cell-specific) radio resource control (RRC) signaling or terminal user level (UE-specific) RRC signaling.
  • SIB system information block
  • RRC radio resource control
  • UE-specific terminal user level
  • the terminal may also use pre-configured SL resource pool configuration information or SL BWP configuration information.
  • the SL resource pool configuration information includes resource pool resource information, and the resource pool resource information is used to indicate the SL resource pool.
  • the resource pool is a collection of time-frequency resources used for sideline communication between terminals.
  • the resource pool may include code domain resources.
  • the resources of the resource pool are used to include resources for the terminal to send and receive at least one of the following physical channels:
  • the physical layer sidelink control channel (PSCCH) is used to carry sidelink control information (SCI).
  • SCI sidelink control information
  • the physical sidelink shared channel (PSSCH) is used to carry at least one of control information, data, and sidelink channel state information (CSI) feedback information.
  • PSSCH physical sidelink shared channel
  • CSI sidelink channel state information
  • PSDCH Physical layer sidelink control channel
  • the physical sidelink feedback channel is used for sidelink feedback information.
  • the sidelink feedback information can be used for feedback of data information, including hybrid automatic repeat request (HARQ) response feedback information.
  • HARQ hybrid automatic repeat request
  • acknowledgement (ACK) or negative acknowledgement (NACK) can also include CSI feedback information, and can also be used to indicate at least one of the following information, such as energy saving information, resource auxiliary information (including recommended resources, not recommended resources, resource collision, resource reservation conflict, half-duplex conflict that has occurred in the past or will occur in the future, etc.).
  • the physical sidelink broadcast channel (PSBCH) is used to carry information related to sidelink synchronization.
  • the service types carried by PSBCH may include unicast, multicast and/or broadcast communication types.
  • PSFCH, PSBCH, PSCCH and PSSCH are merely examples of side feedback channels, side discovery channels, side control channels and side data channels, respectively.
  • data channels and control channels may have different names, and the embodiments of the present application do not limit this.
  • time unit in the time domain of the SL resource pool, one or more time units are included, and the time unit may be one or more symbols, one or more time slots, one or more mini-slots, one or more subframes, one or more frames, etc.
  • One or more time units may be continuous in time or discrete. It should be understood that the time domain units in a resource pool are logically continuous.
  • time slots 1 to 8 are time slots that are continuous in time, and such time slots are called physical time slots.
  • the continuous time slots contained in the resource pool i.e., time slot 1’, 2’, 3’, and 4’
  • Such logically continuous but not necessarily temporally continuous time slots are called logical time slots.
  • a frequency domain unit can be a resource element (RE), several REs, a resource block (RB), several RBs, a sub-channel, and several sub-channels.
  • the size of a sub-channel that is, the number of RBs that a sub-channel includes one or more continuous or interlaced RBs in the frequency domain, can be integers of 10, 12, 15, 20, 25, 50, 75, and 100.
  • the SL resource pool configuration information may also include the configuration information of the PSCCH, and the configuration information of the PSCCH includes the number of symbols occupied by the PSCCH in a time slot and the number of RBs occupied by the PSCCH in a subchannel.
  • the SL BWP configuration information may include the SL resource pool information, which is used to configure the number of resource pools included in the BWP.
  • the SL BWP configuration information may include the SL bandwidth information, which is used to indicate the bandwidth size for SL communication, for example, indicating that the SL bandwidth is 20 megahertz (MHz).
  • the SL BWP configuration information may also include the SL symbol information, which is used to indicate the starting SL symbol position on a time slot and the number of continuous SL symbols occupied.
  • the SL BWP configuration information may also include the SL subcarrier spacing and cyclic prefix information, which are used to indicate the subcarrier spacing and cyclic prefix used for SL communication.
  • the cyclic prefix indicates an extended cyclic prefix or a normal cyclic prefix.
  • the SL BWP configuration information may also include the SL resource pool configuration information.
  • time unit is described as a time slot, but the time unit is not limited to being a time slot.
  • time unit is described as a subchannel, but the frequency domain unit is not limited to being a subchannel.
  • SCI in SL communication is divided into first-level SCI and second-level SCI.
  • PSCCH carries first-level SCI
  • first-level SCI is used to schedule second-level SCI and PSSCH. Since SL is a distributed system, all terminals need to correctly decode first-level SCI before decoding second-level SCI and PSSCH.
  • the resource position of PSCCH is relatively fixed, and the first-level SCI format information carried is also relatively unique, that is, the terminal does not need to blindly detect the time-frequency resource position where PSCCH is located, nor does it need to blindly detect SCI of different formats.
  • PSCCH may exist in each subchannel in each time slot, that is, the time domain starting position of a PSCCH is the second symbol for SL transmission in each time slot, the length is 2 or 3 symbols (determined by the resource pool configuration information), the frequency domain position is the smallest PRB index of each subchannel, the length is at least 10 PRBs (determined by the resource pool configuration information) but does not exceed the size of the subchannel, as shown in Figure 5.
  • the frequency resource assignment field and the time resource assignment field in the first-level SCI are used to indicate the frequency domain and time domain resources for transmitting PSSCH, respectively.
  • the resource reservation period field is used to indicate the resources for periodic reservation of PSSCH transmission.
  • the value of the resource reservation period field is configured by the network device, or preconfigured, or predefined.
  • the base station indicates the value of the resource reservation period through RRC signaling.
  • the RRC signaling can be determined by the high-level parameter s1 resource reservation period 1 (sl-resourceteserveperiod1).
  • the transmission resources of the transmitter of mode 2 resource selection method do not depend on the base station.
  • the transmitter selects the transmission resources for communication within the resource selection window according to the results of its own perception window. Assuming that the transmitter triggers resource selection in time slot n, the specific resource steps are as follows, and the selection process is shown in Figure 6.
  • Step 1 Determine the candidate resources R x,y in units of one time slot and L subCH consecutive subchannels, and the resource selection window [n+T 1 ,n+T 2 ], where Determined by Table 1, ⁇ SL is the configured subcarrier spacing, and T 1 is selected based on implementation.
  • T 2min is configured by the higher layer, if T 2min is less than the remaining PDB (data packet delay), then T 2min ⁇ T 2 ⁇ PDB (data packet delay), and T 2 is selected based on implementation; otherwise T 2 is equal to the remaining PDB.
  • Step 2 Determine the perception window Where T 0 is configured by high-level parameters. Determined from Table 2.
  • Step 3 Determine the threshold value Th( pi , pj ) of the reference signal received power RSRP.
  • the RSRP threshold value is related to the prio TX of the data to be sent and the priority prio RX indicated by the received SCI.
  • Th( pi , pj ) is specifically the prio RX +(prio TX -1)*8th threshold value in the RSRP threshold value set configured in the resource pool.
  • Step 4 Initialize the available resource set S A , including all time-frequency resources in the resource selection window.
  • Step 5 Exclude the following time-frequency resources from SA : the time slots of all periodic resource reservations configured in the resource pool corresponding to the unperceived time slots (transmitted time slots) in the perception window.
  • step 5 if the time-frequency resources excluded by SA are less than X% of the total resources in the resource selection window, re-execute the initialization of step 4.
  • Step 6 Continue to exclude the following time-frequency resources from SA : the decoding of the received first-level SCI is successful, and the result of RSRP measurement of the PSSCH demodulation reference signal (DMRS) of the time-frequency resources reserved by the received first-level SCI is higher than the RSRP threshold determined in step 3, and the time-frequency resources reserved by the received first-level SCI are within the resource selection window, including the retransmission resources indicated by the first-level SCI and the periodically reserved resources.
  • DMRS PSSCH demodulation reference signal
  • Step 7 If the remaining resources in SA are less than X% of the total resources in the resource selection window, where the value of X% is configured by the resource pool and is related to prio TX , then the RSRP threshold determined in step 3 is increased by 3 dB each time until the remaining resources in SA are not less than X% of the total resources in the resource selection window, and step 4 is continued.
  • a time-frequency resource (r 0 , r 1 , r 2 , ...) is randomly selected in SA for sending data. Before sending, a resource re-evaluation is performed on (r 0 , r 1 , r 2 , ). After the re-evaluation, a preemption detection is performed on the resource (r′ 0 , r′ 1 , r′ 2 , ...) selected from SA .
  • the user is in at least time slot
  • the UE can perform resource re-evaluation and preemption detection based on the additional triggering before and after the time slot m-T3.
  • the method of determining whether (r 0 , r 1 , r 2 , ...) and (r′ 0 , r′ 1 , r′ 2 , ...) need to be excluded is the same as step 7, and one of the following conditions is met:
  • the s1 preemption enable ('sl-PreemptionEnable') parameter is not configured to be enabled, and prio pre > prio RX and prio TX > prio pre are satisfied.
  • prio pre is configured by the higher layer.
  • time slot m is the next time slot to be sent, i.e., time slot m belongs to (r 0 ,r 1 ,r 2 ,...) and (r′ 0 ,r′ 1 ,r′ 2 ,).
  • the base station sends CSI-RS.
  • the UE measures and evaluates the wireless channel through the received RS and reports the measurement results to the network.
  • the network can set appropriate transmission parameters for subsequent downlink transmissions based on these measurement results.
  • the CSI-RS of the NR Uu port supports up to 32 different antenna ports, and each antenna port is a channel that needs to be detected. In terms of time-frequency resource occupancy, a single-port CSI-RS occupies only one resource unit RE in a resource block in the frequency domain and a time slot in the time domain.
  • the multiplexing method can be code domain multiplexing, frequency domain multiplexing, and time domain multiplexing.
  • CSI-RS can be configured for periodic transmission, semi-continuous transmission, or non-periodic transmission, and supports unicast, multicast, and broadcast transmission.
  • the SL CSI-RS of the first frequency range (frequency range 1, FR1) is designed based on the CSI-RS of the R15Uu port.
  • the SL CSI-RS configuration is selected by the transmitter and provided to the receiver through the PC5-RRC configuration.
  • the SL CSI-RS configuration includes the resource mapping mode and the number of antenna ports of the SL CSI-RS.
  • the resource mapping of the SL CSI-RS in the PRB is based on the CSI-RS resource mapping mode in NR Uu, which supports up to 2 antenna ports (such as SL in NR V2X can support up to two streams in PSSCH), and the frequency domain density is 1, that is, one CSI-RS is configured on each resource block RB.
  • Figure 7 shows the time slot structure of SL, which includes automatic gain control (AGC), PSCCH, PSSCH, DMRS, GAP (guard period), etc.
  • SL CSI-RS only supports unicast transmission and is sent with data in the PSSCH area of the transmit time slot. At the same time, it is not transmitted on symbols containing PSCCH, second-level SCI or PSSCH DMRS.
  • Each PRB in PSSCH uses the same pattern for SL CSI-RS.
  • the number of symbols occupied by each information in the time slot structure shown in Figure 7 is only shown as an example.
  • the number of symbols occupied by AGC, PSCCH, PSSCH and GAP can be determined by the second terminal, configured by the network device, pre-configured or pre-defined by the protocol, and this application does not make any specific limitations.
  • the transmission time and frequency resources of SL CSI-RS are mainly indicated by the first-level SCI.
  • SCI in NR V2X is transmitted in two levels.
  • the introduction of the second-level SCI makes the SCI design more flexible, supporting unicast, multicast and broadcast transmission in NR V2X, while LTE V2X only supports broadcast.
  • the main advantages of two-level SCI are:
  • the first-level SCI has a fixed size that is independent of the transmission type, avoiding blind detection by the receiving end user;
  • the first level SCI is carried in the PSCCH at a known possible position within the subchannel
  • the first-level SCI indicates the resources of the second-level SCI carried in the PSSCH;
  • a second level SCI with different payload sizes depending on the transmission type reduces the complexity of SCI decoding, not only for the transmitter, but also for the perception terminal that only needs to detect and decode the first level SCI to know which resources are reserved by the receiver.
  • the first-level SCI in NR V2X is carried on the PSCCH and the second-level SCI is carried on the corresponding PSSCH.
  • the PSCCH carries the first-level SCI containing the second-level SCI control information associated with the PSSCH.
  • the first-level SCI indicates the frequency resources of the PSSCH carrying the current (re)transmission of the transport block (TB) and the resources reserved for up to two retransmissions of the TB. If the UE reserves resources for semi-static PSSCH, the first-level SCI also indicates the resource reservation period.
  • the first-level SCI includes the priority of the associated PSSCH, and the format and size of the second-level SCI.
  • the first-level SCI also indicates the modulation and coding scheme (MCS) of the data payload carried in the associated PSSCH.
  • MCS modulation and coding scheme
  • the DMRS associated with the PSSCH in NR V2X can be carried on different symbols within the PSSCH time slot.
  • the PSSCH DMRS can be (pre)configured with multiple time patterns, and the first-level SCI indicates the specific time pattern used by the associated PSSCH.
  • the first level SCI also provides the number of ports for the PSSCH DMRS, which can be equal to one or two, which represents the number of layers (i.e., the number of data streams) supported in the PSSCH. Therefore, by utilizing multiple transmit and receive antennas, up to two data streams can be sent in the PSSCH in the NR V2X SL.
  • the SCI is divided into two levels, allowing other terminals that are not transmitting receiving terminals to decode only the first level SCI for channel sensing, that is, for determining the resources reserved by other transmissions.
  • the second level SCI provides additional control information required by the receiving terminal that needs to transmit.
  • the PSSCH carries the second level SCI and a data payload consisting of TBs.
  • the second level SCI carries information used to decode the PSSCH and support HARQ feedback and CSI reporting, indicating the layer 1 source identity (identifier, ID) and destination ID of the transmission, representing the physical layer identifier of the transmitter and the intended recipient (receiver) of the TB.
  • the layer 1 source ID is used to allow the receiving end to know the identity of the transmitter and then determine the PSFCH of the HARQ feedback.
  • the second level SCI also carries a 1-bit new data indicator to specify whether the TB sent in the PSSCH corresponds to a new data transmission or a retransmission.
  • the HARQ process ID is also included in the second level SCI to identify the TB.
  • the second level SCI also Indicates whether HARQ feedback for PSSCH is enabled or disabled.
  • the FR1SL CSI-RS workflow is as follows:
  • the transmitter sends the CSI request and SL CSI-RS in the first-level SCI, triggering the receiver of the unicast link to feedback the CSI report.
  • the transmitter can configure the receiver's non-periodic CSI reporting.
  • the transmitter first sends the SCI, which contains the user ID of the SL CSI-RS, the SL CSI-RS transmission information, including the time-frequency resource information, resource ID, scrambling code ID, etc. of the SL CSI-RS.
  • the SCI can also include a time offset to instruct the receiver to send CSI feedback information in a specific subframe or time slot.
  • the receiver measures the CSI based on the SL CSI-RS sent by the transmitter, and feeds back the CSI through the PSSCH sent by the receiver to the transmitter.
  • the CSI feedback of the receiver is carried in the MAC CE.
  • the receiver In order to avoid CSI timeout, the receiver is expected to feed back the CSI report within the maximum time.
  • the delay limit is determined by the transmitter and sent to the receiver through PC5-RRC signaling.
  • SL distributed system of the FR2 millimeter wave frequency band beam misalignment may occur between the transmitter and the receiver due to sudden channel fluctuations, unexpected obstacle interruptions, terminal rotation, etc.
  • beam training based on SL CSI-RS is considered to achieve beam alignment between the transmitter and the receiver.
  • the SL CSI-RS in FR1 is unicasted with the data in the PSSCH. Since it is limited by the transmission of the accompanying service data itself, it cannot be independently sent periodically or non-periodically to achieve beam training and calibration. Even if the data is periodic data, the service data period and the SL CSI-RS transmission period are not the same concept. Therefore, there is currently only non-periodic SL CSI-RS with the channel, which poses a challenge to the beam training based on SL CSI-RS in FR2 millimeter wave communication.
  • the beam management of the NR Uu interface is based on the extremely flexible CSI-RS framework and the powerful MIMO capability of the base station.
  • the reference signal corresponding to CSI-RS is SL CSI-RS.
  • SL CSI-RS is a reference signal proprietary to SL. Its basic function is to measure the channel of SL to calculate the rank indicator (RI) and channel quality indicator (CQI) of the channel, and to help the transmitter determine the parameters such as the transmission mode, MCS and code rate.
  • the SL CSI-RS on the FR2 band can also realize other functions, such as serving as a reference signal for beam training in SL.
  • the terminal-to-terminal (UE-to-UE) beam management in SL should be appropriately changed, especially the transmission beam training process needs to be carried out efficiently. This puts forward new requirements for the transmission method of the SL CSI-RS of the terminal on the FR2 band.
  • Beam management is an important technology proposed by 5G NR for FR2 beamforming. It is the process by which base stations and terminals obtain and maintain beam sets for sending and receiving, and then achieve high-gain communication with reasonable beam pairs.
  • the current FR2 beam management process is designed for base stations and terminals, that is, the base station first performs coarse beam scanning and the terminal receives.
  • both the transmitter and the receiver are terminals, and the beam management process in 5G NR is no longer applicable, and there is no standard support for related technical solutions.
  • the method provided in the embodiment of the present application can be applied to the scenario of beam training on the FR2 frequency band in a V2X distributed system.
  • the scenario of beam scanning at the transmitting end in the distributed system is shown in FIG8 .
  • the important elements in the scenario are explained as follows:
  • Transmitter UE The information sending entity in V2X SL, taking vehicle UE as an example in the figure.
  • Receiving UE The information receiving entity in V2X SL, taking the vehicle UE as an example in the figure.
  • Transmit beam refers to the directional radiation pattern of the transmitting UE on a certain antenna port. The figure shows the transmit beams in four directions. Each beam radiates periodically for beam training to achieve beam alignment with the receiving UE.
  • each terminal in the SL system is in a peer-to-peer relationship and there is no unified coordination and scheduling by the base station, whether the terminal receives or sends cannot be determined in the distributed system.
  • UE-to-UE beam management lacks reference signals for beam training.
  • the SL CSI-RS in FR1 must be unicasted with the data in the PSSCH. Since it is limited by the transmission of the accompanying service data itself, it cannot be independently sent periodically or non-periodically to achieve beam training and calibration. Furthermore, even if the data is periodic data, the service period and the SL CSI-RS transmission period are not the same concept. Therefore, there is currently only an accompanying non-periodic reference signal SL CSI-RS, which makes it impossible to perform beam training based on SL CSI-RS on the FR2 frequency band.
  • an embodiment of the present application provides a resource indication method.
  • the second terminal can send PSCCH to the first terminal.
  • the PSCCH can carry SCI, and the SCI can be used to indicate the time-frequency resources of PSSCH.
  • the second terminal can send a side reference signal and PSSCH to the first terminal.
  • the PSSCH can only carry MAC CE.
  • PSCCH, PSSCH and side reference signal are sent in the same time slot. Based on this method, considering the separate structure of the side reference signal and the PSSCH accompanying data, the time slot structure of only MAC CE and side reference signal is filled in PSSCH, as shown in Figure 9.
  • the above-mentioned time slot structure can be used for transmission beam training based on SL CSI-RS on the FR2 frequency band, which ensures the stripping of the side reference signal and the accompanying data in the PSSCH, while avoiding the transmission of a separate (standalone) side reference signal, while ensuring the integrity and consistency with the existing SL time slot structure.
  • the PSSCH may also only carry the MAC CE and the second-level SCI; the SCI carried in the PSCCH is used to indicate the time-frequency resources of the PSSCH; the second-level SCI carried by the PSSCH is used to indicate the decoding of the PSSCH.
  • the specific content carried by the PSSCH may be different, and the embodiments of the present application do not limit this.
  • an exemplary flow chart of a resource indication method may include the following operations.
  • the first terminal may be the terminal device 101 shown in Fig. 1A
  • the second terminal may be the terminal device 102 shown in Fig. 1A.
  • the second terminal sends a PSCCH to the first terminal.
  • the first terminal receives the PSCCH from the second terminal.
  • the above-mentioned PSCCH can carry SCI, such as the first-level SCI.
  • the SCI can be used to indicate the time-frequency resources of the PSSCH.
  • the SCI can also indicate the time-frequency resource information of the second-level SCI.
  • the second terminal has at most one activated BWP on one carrier, and the first terminal and the second terminal use the same BWP.
  • the second terminal may indicate the frequency domain resources of the PSSCH through the frequency domain resource indication (frequency resource assignment) field in the SCI.
  • the second terminal may indicate the time domain resources of the PSSCH through the time domain resource indication (time resource assignment) field and the resource reservation period (reservation period) field in the SCI.
  • the second terminal sends a sidelink reference signal and a PSSCH to the first terminal.
  • the second terminal receives the sidelink reference signal and the PSSCH from the first terminal.
  • PSSCH may only carry MAC CE.
  • the side reference signal may be a side reference signal such as SL CSI-RS or DMRS.
  • the PSCCH and PSSCH sent by the second terminal to the first terminal may be as shown in FIG9.
  • AGC, PSCCH, PSSCH and the side reference signal are sent in the same time slot.
  • the GAP shown in FIG9 may be a GAP between two transmission time slots. Based on the time slot structure shown in FIG9, only MAC CE and the side reference signal may be filled in the PSSCH, which ensures that the side reference signal and the accompanying data in the PSSCH are stripped while avoiding the transmission of the standalone side reference signal.
  • the embodiment shown in FIG. 10 may further include the following operation S1000 .
  • the second terminal selects the time domain resource set of SL CSI-RS.
  • the time domain resource set may include multiple time slots, and the interval between two adjacent time slots is the same. It should be noted that two adjacent time slots may refer to two logically continuous time slots. It should be noted that when the second terminal selects the time domain resource set in S1000, it can be implemented with reference to the embodiment shown in Figure 6, which will not be repeated here.
  • the above-mentioned SCI can also be used to indicate the time-frequency resources of the side reference signal.
  • the SCI indicates the time domain resource set of the side reference signal.
  • the time domain resource set can be the time domain resource set selected by the second terminal in S1000.
  • the side reference signal is SL CSI RS as an example for explanation.
  • the parameter value N rsv_period of the resource reservation period field in the SCI is used to indicate the period of the service data carried by the PSSCH.
  • the threshold value defaults to 0.
  • N rsv_period when selecting resources for the time slot where the SL CSI-RS is located, it can be designed to use N rsv_period to indicate the period of the SL CSI-RS, as shown in Figure 11.
  • N rsv_period is used to indicate the period of the transmission time slot where the SL CSI-RS is located.
  • the second terminal sends PSCCH in time slot n
  • the PSCCH can carry SCI.
  • the SCI can indicate the period of PSSCH or the period N rsv_period of SL CSI-RS.
  • the second terminal sends PSSCH and SL CSI-RS in time slot n.
  • the resource selection method indicated by the N rsv_period field in the SCI ensures the periodic transmission of the time slot where the SL CSI-RS is located, which is then used for the beam training process of the terminal.
  • N rsv_period in the above text can be configured by the network device, configured by the first terminal to the second terminal, or determined by the second terminal itself, and this application does not make any specific limitation.
  • Case 2 SCI indicates time domain resource information, and the time domain resource information includes Q time slot offsets t q .
  • the parameter value TRIV of the time resource assignment field in the SCI may indicate Q time slot offsets tq .
  • the Q may be an integer greater than or equal to 1, such as 2, 3 or even a larger value. An integer from 1 to Q.
  • the time slots of the SL CSI-RS indicated by the time domain resource information include time slot n and time slot n+t q . It should be understood that n may be the index of the transmission time slot in which the PSCCH is transmitted.
  • the qth time slot offset tq among the Q time slot offsets is q times the 1st time slot offset t1 among the Q time slot offsets.
  • Q can indicate 2 time slot offsets, which are t1 and t2 .
  • the design condition constraints t1 and t2 indicate the above selected time domain resource set to achieve periodic transmission of the time slot where the SL CSI-RS is located.
  • t2 2* t1 .
  • PSCCH can carry SCI
  • the second terminal sends SL CSI-RS in time slots n+t 1 and n+t 2 , that is, the transmission time slots n+t 1 and n+t 2 in the SL resource pool are reserved in time slot n.
  • the intervals between two adjacent time slots indicated by SCI are the same.
  • chain reservation of time slots can be realized in this example.
  • the second terminal can send PSCCH, PSSCH and SL CSI-RS.
  • PSSCH can carry SCI
  • the SCI can indicate 1 time slot offset t' 1 .
  • the second terminal reserves the transmission time slot n+t 1 +t′ 1 in the SL resource pool, and so on.
  • t′ 1 may be the same as t 1 .
  • the number of time slot offsets indicated by the SCI in FIG12 is only shown as an example. In fact, the number of time slot offsets indicated by each SCI may be the same or different. In the time slot set of the SL CSI-RS formed by the value of the time slot offset indicated by each SCI, the interval between two adjacent time slots is the same.
  • the time slot offset tq ' indicated by the SCI sent in time slot n+ t1 is the same as the time slot offset tq .
  • the PSCCH can carry SCI
  • the SCI can indicate 1 time slot offset t1
  • the second terminal has SL CSI-RS transmission in time slot n+ t1 , that is, the transmission time slot n+ t1 in the SL resource pool is reserved in time slot n.
  • chain reservation of time slots can be realized.
  • the second terminal can send PSCCH, PSSCH and SL CSI-RS in time slot n+ t1 .
  • the PSSCH can carry SCI
  • the second terminal can carry only MAC CE on the PSSCH to realize the separation of SL CSI-RS and business data, and can select a time domain resource set evenly distributed in the time domain to send the SL CSI-RS, and indicate the time domain resource set through SCI, thereby realizing uniform and periodic resource selection of the time slot where the SL CSI-RS is located. Therefore, the second terminal can send SL CSI-RS to the first terminal through the time domain resource set for beam training, such as the first terminal and the second terminal performing beam training.
  • the embodiment of the present application also provides another time slot structure.
  • PSSCH carries SL CSI-RS and MAC CE
  • it also carries MAC PDU.
  • MAC PDU can carry SL discovery message.
  • the SL discovery message can be used to discover other terminals, such as a first terminal discovering a second terminal.
  • PSSCH can also carry MAC CE, MAC PDU and second-level SCI, the SCI carried in PSCCH is used to indicate the time-frequency resources of PSSCH, and the second-level SCI carried by PSSCH is used to indicate the decoding of PSSCH.
  • the specific content carried by PSSCH may be different, and the embodiments of the present application do not limit this.
  • the embodiment of the present application also provides another resource indication method.
  • FIG. 15 is an exemplary flow chart of a resource indication method provided in the embodiment of the present application, the method may include the following operations.
  • the second terminal sends a PSCCH to the first terminal.
  • the first terminal receives the PSCCH from the second terminal.
  • the above-mentioned PSCCH can carry SCI, such as the first-level SCI.
  • the SCI can be used to indicate the time-frequency resources of the PSSCH, or the time-frequency resources of the SL CSI-RS.
  • the SCI can also indicate the time-frequency resources of the second-level SCI.
  • the second terminal has at most one activated BWP on one carrier, and the second terminal uses the same BWP as the first terminal.
  • the second terminal may indicate the frequency domain resources of the PSSCH through the frequency domain resource indication (frequency resource assignment) field in the SCI.
  • the second terminal may indicate the time domain resources of the PSSCH through the time domain resource indication (time resource assignment) field and the resource reservation period (reservation period) field in the SCI.
  • the second terminal sends SL CSI-RS and PSSCH to the first terminal.
  • the second terminal receives the sidelink reference signal and the PSSCH from the first terminal.
  • PSCCH can carry MAC PDU and MAC CE.
  • PSCCH and PSSCH sent by the second terminal to the first terminal can be as shown in FIG14.
  • AGC, PSCCH and PSSCH and side reference signal can be sent in the same time slot.
  • the GAP shown in FIG14 can be a GAP between two transmission time slots.
  • the embodiment shown in FIG. 14 may further include the following operation S1500.
  • the second terminal selects the time domain resource set of SL CSI-RS.
  • the time domain resource set may include multiple time slots, and the interval between two adjacent time slots is the same. It should be noted that two adjacent time slots may refer to two logically continuous time slots. It should be noted that when the second terminal selects the time domain resource set in S1500, it can be implemented with reference to the embodiment shown in Figure 6, which will not be repeated here.
  • the SCI may also be used to indicate the time-frequency resources of the side reference signal.
  • the SCI indicates a time domain resource set of the side reference signal.
  • the time domain resource set may be a time domain resource set selected by the second terminal in S1500. It is understood that the manner in which the SCI indicates the time-frequency resources of the side reference signal may be implemented with reference to the aforementioned situation 1.
  • the time slot occupied by the MAC PDU can be indicated based on the parameter value N rsv_period of the resource reservation period field in the SCI to implement periodic time domain resource reservation for the PSSCH.
  • the second terminal sends PSCCH, PSSCH and SL CSI-RS in time slot n
  • the periodic time slot resources in the SL resource pool are reserved, so that other terminals in the distributed SL system can avoid these reserved resources after sensing, ensuring the periodic service data while realizing the periodic transmission of the time slot where the SL CSI-RS is located, which is then used for the beam training process of the terminal.
  • a resource indication method is also provided in the embodiment of the present application, in which the second terminal can send the time slot structure shown in Figure 9 and Figure 14.
  • a resource indication method provided in the embodiment of the present application can include the following operations.
  • the second terminal sends a first PSCCH to the first terminal.
  • the first terminal receives the first PSCCH from the second terminal.
  • the first PSCCH may carry a first SCI.
  • the first SCI may indicate the time-frequency resources of the first PSSCH.
  • the first SCI may be a first level SCI.
  • the second terminal sends the first PSSCH and the first SL CSI-RS to the first terminal.
  • the first PSSCH can only carry MAC CE, as shown in Figure 9.
  • the first SL CSI-RS, the first PSSCH and the first PSCCH are sent in the same time slot.
  • the second terminal sends a second PSCCH to the first terminal.
  • the first terminal receives the second PSCCH from the second terminal.
  • the second PSCCH may carry a second SCI.
  • the second SCI may indicate the time-frequency resources of the second PSSCH.
  • the second SCI may be a first-level SCI.
  • the second terminal sends the second PSSCH and the second SL CSI-RS to the first terminal.
  • the first terminal receives the second PSSCH and the second SL CSI-RS from the second terminal.
  • the second PSSCH can carry MAC CE and MAC PDU, as shown in Figure 14.
  • the second SL CSI-RS, the second PSSCH and the second PSCCH are sent in the same time slot.
  • the first SL CSI-RS and the second SL CSI-RS can be used for the terminal to perform beam training.
  • the second terminal Before sending the first SL CSI-RS and the second SL CSI-RS, the second terminal can select a first time domain resource set of the first SL CSI-RS and the second SL CSI-RS.
  • the embodiment shown in FIG. 17 may further include the following operation S1700.
  • S1700 The second terminal selects the first time domain resource set of SL CSI-RS.
  • the first time domain resource set may include multiple time slots, and the interval between two adjacent time slots is the same. It should be noted that two adjacent time slots may refer to two logically continuous time slots. It should be noted that when the second terminal selects the time domain resource set in S1700, it can be implemented with reference to the embodiment shown in Figure 6, which will not be repeated here.
  • the time slots included in the first time domain resource set selected in S1700 can be used to send the first SL CSI-RS and the second SL CSI-RS.
  • the first SCI and the second SCI may indicate the first time domain resource set selected above.
  • the first SCI may indicate the second time domain resource set of the first SL CSI-RS
  • the second SCI may indicate the third time domain resource set of the second SL CSI-RS.
  • the set consisting of the second time domain resource set of the first SL CSI-RS and the third time domain resource set of the second SL CSI-RS may include multiple time slots.
  • the union of the second time domain resource set and the third time domain resource set, that is, the time slots included in the first time domain resource set, has the same interval between two adjacent time slots.
  • the first SCI may indicate the second time domain resource set of the first SL CSI-RS.
  • the first SCI may indicate Q time domain resource offsets t q .
  • the time slots included in the second time domain resource set of the first SL CSI-RS may include time slot n and time slot n+t q . Where n is the index of the transmission time slot for sending the first PSCCH.
  • the set consisting of the time slot n and time slot n+ tq of the first SL CSI-RS and the time slot n+k* Nrsv_period of the second SL CSI-RS may include multiple time slots, and the interval between two adjacent time slots in the multiple time slots is the same. This is described below with reference to FIG.
  • the second terminal sends PSCCH on time slot n, and the PSCCH can carry SCI.
  • the SCI can indicate the period of PSSCH or the period of SL CSI-RS N rsv_period .
  • the second terminal sends PSSCH and SL CSI-RS on time slot n, and the PSSCH carries MAC PDU and MAC CE.
  • the second terminal sends PSCCH on time slot n+t 1 , and the PSCCH can carry SCI.
  • the SCI can indicate two time slot offsets, t 1 and t 2 , respectively.
  • the second terminal has transmissions of SL CSI-RS on time slots n+t 1 and n+t 2. It can be seen from FIG. 18 that whether PSSCH carries MAC PDU does not affect the selection of the time slot of SL CSI-RS.
  • the second terminal sends PSCCH in time slot n+t 2 , and the PSCCH can carry SCI, and the SCI can indicate a time slot offset t 1. It can be understood that the t 1 can be the same as or different from the t 1 indicated by the SCI sent in time slot n+t 1.
  • the second terminal can indicate the sending time slot resources of PSSCH or the time slot resources of SL CSI-RS through SCI, or indicate Q time slot offsets through SCI, which can achieve uniform time slots of the selected SL CSI-RS to better perform the beam scanning process.
  • the time slot of SL CSI-RS through SCI other terminals in the distributed SL system can avoid these reserved resources after sensing, ensuring the transmission of MAC PDU while realizing the resource selection of the time slot where SL CSI-RS is located, which is used for the beam training process of the first terminal.
  • time slot structures sent in different time slots may be different, the time slots contained in the time domain resource set selected and indicated by the second terminal are evenly distributed, which can better perform the beam scanning process.
  • the second terminal in the embodiment of the present application can indicate the time slot of the SL CSI-RS.
  • the second terminal can send the SL CSI-RS through the selected time slot of the SL CSI-RS, allowing the first terminal to perform beam training based on the SL CSI-RS.
  • the process of beam training can refer to the beam training process of the aforementioned base station and terminal, which will not be repeated here.
  • FIG 19 is a schematic block diagram of a communication device 1900 provided in an embodiment of the present application.
  • the communication device 1900 can correspond to the functions or steps implemented by the first network device or the second network device in the above-mentioned various method embodiments.
  • the communication device may include a processing unit 1910 and a transceiver unit 1920.
  • a storage unit may also be included, which can be used to store instructions (codes or programs) and/or data.
  • the processing unit 1910 and the transceiver unit 1920 can be coupled to the storage unit.
  • the processing unit 1910 can read the instructions (codes or programs) and/or data in the storage unit to implement the corresponding method.
  • the above-mentioned units can be set independently or partially or fully integrated.
  • the communication device 1900 can correspond to the implementation of the behavior and function of the second terminal in the above method embodiment.
  • the communication device 1900 can be a second terminal, or a component (such as a chip or circuit) applied to the second terminal.
  • the transceiver unit 1920 can be used to perform all receiving or sending operations performed by the second terminal in the embodiment shown in Figure 10.
  • S1000 in the embodiment shown in Figure 10, and/or other processes for supporting the technology described herein.
  • the processing unit 1910 is used to generate SCI.
  • the transceiver unit 1920 is used to send PSCCH to the first terminal.
  • PSCCH carries SCI
  • SCI is used to indicate PSSCH time-frequency resources.
  • the transceiver unit 1920 is also used to send a sidelink reference signal and PSSCH to the first terminal.
  • PSSCH only carries MAC CE.
  • the sidelink reference signal is used for beam training. PSCCH, PSSCH and sidelink reference signal are sent in the same time slot.
  • the communication device 1900 can correspond to the implementation of the behavior and function of the second terminal in the above method embodiment.
  • the communication device 1900 can be a second terminal, or a component (such as a chip or circuit) applied to the second terminal.
  • the transceiver unit 1920 can be used to perform all receiving or sending operations performed by the second terminal in the embodiment shown in Figure 15.
  • S1501 in the embodiment shown in Figure 15, and/or other processes for supporting the technology described herein; wherein the processing unit 1910 is used to perform all operations except the transceiver operation performed by the second terminal in the embodiment shown in Figure 15.
  • S1500 in the embodiment shown in Figure 15, and/or other processes for supporting the technology described herein.
  • the processing unit 1910 is used to generate SCI.
  • the transceiver unit 1920 is used to send PSCCH to the first terminal.
  • PSCCH carries SCI
  • SCI is used to indicate PSSCH time-frequency resources.
  • the transceiver unit 1920 is also used to send a sidelink reference signal and PSSCH to the first terminal.
  • PSSCH carries MAC CE and MAC PDU.
  • the sidelink reference signal is used for beam training. PSCCH, PSSCH and sidelink reference signal are sent in the same time slot.
  • the communication device 1900 can correspond to the behavior and function of the second terminal in the above method embodiment.
  • the communication device 1900 can be a second terminal, or a component (such as a chip or circuit) applied to the second terminal.
  • the transceiver unit 1920 can be used to perform all receiving or sending operations performed by the second terminal in the embodiment shown in Figure 17.
  • the processing unit 1910 is used to generate a first SCI and a second SCI.
  • the transceiver unit 1920 is used to send a first PSCCH to the first terminal.
  • the first PSCCH carries the first SCI
  • the first SCI is used to indicate the time-frequency resources of the first PSSCH.
  • the transceiver unit 1920 is also used to send a first sideline reference signal and a first PSSCH to the first terminal.
  • the first sideline reference signal is used for beam training, and the first PSSCH only carries the first MAC CE.
  • the first PSCCH, the first PSSCH and the first sideline reference signal are sent in the same time slot.
  • the transceiver unit 1920 is also used to send a second PSCCH to the first terminal.
  • the second PSCCH carries the second SCI, and the second SCI is used to indicate the time-frequency resources of the second PSSCH.
  • the transceiver unit 1920 is also used to send a second sideline reference signal and a second PSSCH to the first terminal.
  • the second sideline reference signal is used for beam training, and the second PSSCH carries the second MAC CE and MAC PDU.
  • the second PSCCH, the second PSSCH and the second sideline reference signal are sent in the same time slot.
  • the communication device 1900 can implement the behaviors and functions of the first terminal in the above method embodiments.
  • the communication device 1900 can be the first terminal, or a component (such as a chip or circuit) used in the first terminal.
  • the processing unit 1920 may be used to perform all receiving or sending operations performed by the first terminal in the embodiment shown in FIG10.
  • the transceiver unit 1920 is used to receive the PSCCH from the second terminal.
  • the PSCCH carries the SCI, and the SCI is used to indicate the time-frequency resources of the PSSCH.
  • the transceiver unit 1920 is also used to receive the side reference signal and the PSSCH from the second terminal.
  • the PSSCH only carries the MAC CE, and the side reference signal is used for beam training.
  • the PSCCH, PSSCH and the side reference signal are sent in the same time slot.
  • the processing unit 1910 is used to determine the time-frequency resources of the PSSCH.
  • the communication device 1900 can correspond to the implementation of the behavior and function of the first terminal in the above-mentioned method embodiment.
  • the communication device 1900 can be a first terminal, or a component (such as a chip or circuit) applied to the first terminal.
  • the transceiver unit 1920 can be used to perform all receiving or sending operations performed by the first terminal in the embodiment shown in Figure 15.
  • the transceiver unit 1920 is used to receive the PSCCH from the second terminal.
  • the PSCCH carries the SCI, and the SCI is used to indicate the time-frequency resources of the PSSCH.
  • the transceiver unit 1920 is also used to receive the side reference signal and the PSSCH from the second terminal.
  • the PSSCH carries the MAC CE and the MAC PDU, and the side reference signal is used for beam training.
  • the PSCCH, PSSCH and the side reference signal are sent in the same time slot.
  • the processing unit 1910 is used to determine the time-frequency resources of the PSSCH.
  • the communication device 1900 can correspond to the implementation of the behavior and function of the first terminal in the above method embodiment.
  • the communication device 1900 can be a first terminal, or a component (such as a chip or circuit) applied to the first terminal.
  • the transceiver unit 1920 can be used to perform all receiving or sending operations performed by the first terminal in the embodiment shown in Figure 17.
  • the transceiver unit 1920 is used to receive a first PSCCH from a second terminal.
  • the first PSCCH carries a first SCI
  • the first SCI is used to indicate the time-frequency resources of the first PSSCH.
  • the transceiver unit 1920 is also used to receive a first sideline reference signal and a first PSSCH from a second terminal.
  • the first sideline reference signal is used for beam training, and the first PSSCH only carries a first MAC CE.
  • the first PSCCH, the first PSSCH, and the first sideline reference signal are sent in the same time slot.
  • the transceiver unit 1920 is also used to receive a second PSCCH from a second terminal.
  • the second PSCCH carries a second SCI, and the second SCI is used to indicate the time-frequency resources of the second PSSCH.
  • the transceiver unit 1920 is also used to receive a second sideline reference signal and a second PSSCH from a second terminal.
  • the second sideline reference signal is used for beam training, and the second PSSCH carries a second MAC CE and a MAC PDU.
  • the second PSCCH, the second PSSCH, and the second sideline reference signal are sent in the same time slot.
  • the processing unit 1910 is configured to determine the time-frequency resources of the first PSSCH and the time-frequency resources of the second PSSCH.
  • processing unit 1910 in the embodiment of the present application can be implemented by a processor or a processor-related circuit component
  • transceiver unit 1920 can be implemented by a transceiver or a transceiver-related circuit component or a communication interface.
  • an embodiment of the present application provides a communication device 2000.
  • the communication device 2000 includes a processor 2010.
  • the communication device 2000 may also include a memory 2020 for storing instructions executed by the processor 2010 or storing input data required by the processor 2010 to run the instructions or storing data generated after the processor 2010 runs the instructions.
  • the processor 2010 may implement the method shown in the above method embodiment through the instructions stored in the memory 2020.
  • the embodiment of the present application provides a communication device 2100, which can be a chip or a chip system.
  • the chip system can be composed of chips, or can include chips and other discrete devices.
  • the communication device 2100 may include at least one processor 2110, and the processor 2110 is coupled to a memory.
  • the memory may be located inside the device or outside the device.
  • the communication device 2100 may also include at least one memory 2120.
  • the memory 2120 stores necessary computer programs, configuration information, computer programs or instructions and/or data for implementing any of the above embodiments; the processor 2110 may execute the computer program stored in the memory 2120 to complete the method in any of the above embodiments.
  • the coupling in the embodiment of the present application is an indirect coupling or communication connection between devices, units or modules, which can be electrical, mechanical or other forms, and is used for information exchange between devices, units or modules.
  • the processor 2110 may operate in conjunction with the memory 2120.
  • the specific connection medium between the transceiver 2130 , the processor 2110 , and the memory 2120 is not limited in this embodiment.
  • the communication device 2100 may also include a transceiver 2130, and the communication device 2100 may exchange information with other devices through the transceiver 2130.
  • the transceiver 2130 may be a circuit, a bus, a transceiver or any other device that can be used for information exchange, or may be referred to as a signal transceiver unit. As shown in FIG21 , the transceiver 2130 includes a transmitter 2131, a receiver 2132 and an antenna 2133.
  • the transceiver in the communication device 2100 may also be an input-output circuit and/or a communication interface, which may input data (or receive data) and output data (or send data), and the processor may be an integrated processor or a microprocessor or an integrated circuit, and the processor may determine output data based on input data.
  • the communication device 2100 may be applied to a second terminal, and the specific communication device 2100 may be a second terminal, or may be a device capable of supporting the second terminal to implement the function of the second terminal in any of the above-mentioned embodiments.
  • the memory 2120 stores the necessary computer programs, computer programs or instructions and/or data for implementing the function of the second terminal in any of the above-mentioned embodiments.
  • the processor 2110 may execute the computer program stored in the memory 2120 to complete the method executed by the second terminal in any of the above-mentioned embodiments.
  • the communication device 2100 may be applied to a first terminal, and the specific communication device 2100 may be a first terminal, or may be a device capable of supporting the first terminal to implement the functions of the first terminal in any of the above-mentioned embodiments.
  • the memory 2120 stores necessary computer programs, computer programs or instructions and/or data for implementing the functions of the first terminal in any of the above-mentioned embodiments.
  • the processor 2110 may execute the computer program stored in the memory 2120 to complete the method executed by the first terminal in any of the above-mentioned embodiments.
  • the communication device 2100 provided in this embodiment can be applied to the second terminal to complete the method executed by the second terminal, or can be applied to the first terminal to complete the method executed by the first terminal, the technical effects that can be obtained can refer to the above method embodiments, which will not be repeated here.
  • the processor may be a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component, and may implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of the present application.
  • the general-purpose processor may be a microprocessor or any conventional processor, etc.
  • the steps of the method disclosed in the embodiments of the present application may be directly embodied as being executed by a hardware processor, or may be executed by a combination of hardware and software modules in the processor.
  • the memory may be a non-volatile memory, such as a hard disk drive (HDD) or a solid-state drive (SSD), etc., or a volatile memory (volatile memory), such as a random-access memory (RAM).
  • the memory may also be any other medium that can be used to carry or store the desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto.
  • the memory in the embodiments of the present application may also be a circuit or any other device that can implement a storage function, for storing computer programs, computer programs or instructions and/or data.
  • the embodiments of the present application also provide another communication device 2200, including: an input-output interface 2210 and a logic circuit 2220; the input-output interface 2210 is used to receive code instructions and transmit them to the logic circuit 2220; the logic circuit 2220 is used to run code instructions to execute the method executed by the second terminal or the first terminal in any of the above embodiments.
  • the following describes in detail the operations performed by the communication device when applied to the second terminal or the first terminal.
  • the communication device 2200 may be applied to a second terminal to execute the method executed by the second terminal, for example, the method executed by the second terminal in the embodiment shown in FIG. 10 .
  • the logic circuit 2220 is used to generate SCI.
  • the input-output interface 2210 is used to output PSCCH to the first terminal.
  • PSCCH carries SCI
  • SCI is used to indicate PSSCH time-frequency resources.
  • the input-output interface 2210 is also used to output the side reference signal and PSSCH to the first terminal.
  • PSSCH only carries MAC CE.
  • the side reference signal is used for beam training. PSCCH, PSSCH and side reference signal are sent in the same time slot.
  • the communication device 2200 may be applied to a second terminal to execute the method executed by the second terminal, for example, the method executed by the second terminal in the embodiment shown in FIG. 15 .
  • the logic circuit 2220 is used to generate SCI.
  • the input-output interface 2210 is used to output PSCCH to the first terminal.
  • PSCCH carries SCI
  • SCI is used to indicate PSSCH time-frequency resources.
  • the input-output interface 2210 is also used to output a sidelink reference signal and PSSCH to the first terminal.
  • PSSCH carries MAC CE and MAC PDU.
  • the sidelink reference signal is used for beam training. PSCCH, PSSCH and sidelink reference signal are sent in the same time slot.
  • the communication device 2200 may be applied to a second terminal to execute the method executed by the second terminal, for example, the method executed by the second terminal in the embodiment shown in FIG. 17 .
  • the logic circuit 2220 is used to generate the first SCI and the second SCI.
  • the input-output interface 2210 is used to output the first PSCCH to the first terminal.
  • the first PSCCH carries the first SCI
  • the first SCI is used to indicate the time-frequency resources of the first PSSCH.
  • the input-output interface 2210 is used to output the first PSCCH to the first terminal. It is also used to output the first side reference signal and the first PSSCH to the first terminal.
  • the first side reference signal is used for beam training, and the first PSSCH only carries the first MAC CE.
  • the first PSCCH, the first PSSCH and the first side reference signal are sent in the same time slot.
  • the input-output interface 2210 is also used to output the second PSCCH to the first terminal.
  • the second PSCCH carries the second SCI, and the second SCI is used to indicate the time-frequency resources of the second PSSCH.
  • the input-output interface 2210 is also used to output the second side reference signal and the second PSSCH to the first terminal.
  • the second side reference signal is used for beam training, and the second PSSCH carries the second MAC CE and MAC PDU.
  • the second PSCCH, the second PSSCH and the second side reference signal are sent in the same time slot.
  • the communication device 2200 provided in this embodiment can be applied to the second terminal to complete the method executed by the second terminal, the technical effects that can be obtained can refer to the above method embodiment and will not be repeated here.
  • the communication device 2200 may be applied to a first terminal to execute the method executed by the first terminal, for example, the method executed by the first terminal in the embodiment shown in FIG. 10 .
  • the input-output interface 2210 is used to input the PSCCH from the second terminal.
  • the PSCCH carries the SCI, and the SCI is used to indicate the time-frequency resources of the PSSCH.
  • the input-output interface 2210 is also used to input the side reference signal and the PSSCH from the second terminal. Among them, the PSSCH only carries the MAC CE, and the side reference signal is used for beam training. The PSCCH, PSSCH and the side reference signal are sent in the same time slot.
  • the logic circuit 2220 is used to determine the time-frequency resources of the PSSCH.
  • the communication device 2200 may be applied to a first terminal to execute the method executed by the first terminal, for example, the method executed by the first terminal in the embodiment shown in FIG. 15 .
  • the input-output interface 2210 is used to input the PSCCH from the second terminal.
  • the PSCCH carries the SCI, which is used to indicate the time-frequency resources of the PSSCH.
  • the input-output interface 2210 is also used to input the side reference signal and PSSCH from the second terminal.
  • the PSSCH carries the MAC CE and MAC PDU, and the side reference signal is used for beam training.
  • the PSCCH, PSSCH and the side reference signal are sent in the same time slot.
  • the logic circuit 2220 is used to determine the time-frequency resources of the PSSCH.
  • the communication device 2200 may be applied to a first terminal to execute the method executed by the first terminal, for example, the method executed by the first terminal in the embodiment shown in FIG. 17 .
  • the input-output interface 2210 is used to input the first PSCCH from the second terminal.
  • the first PSCCH carries the first SCI, and the first SCI is used to indicate the time-frequency resources of the first PSSCH.
  • the input-output interface 2210 is also used to input the first sideline reference signal and the first PSSCH from the second terminal.
  • the first sideline reference signal is used for beam training, and the first PSSCH only carries the first MAC CE.
  • the first PSCCH, the first PSSCH and the first sideline reference signal are sent in the same time slot.
  • the input-output interface 2210 is also used to input the second PSCCH from the second terminal.
  • the second PSCCH carries the second SCI, and the second SCI is used to indicate the time-frequency resources of the second PSSCH.
  • the input-output interface 2210 is also used to input the second sideline reference signal and the second PSSCH from the second terminal.
  • the second sideline reference signal is used for beam training, and the second PSSCH carries the second MAC CE and MAC PDU.
  • the second PSCCH, the second PSSCH and the second sideline reference signal are sent in the same time slot.
  • the logic circuit 2220 is used to determine the time-frequency resources of the first PSSCH and the time-frequency resources of the second PSSCH.
  • the communication device 2200 provided in this embodiment can be applied to the first terminal to complete the method executed by the first terminal, the technical effects that can be obtained can refer to the above method embodiments, which will not be described in detail here.
  • the embodiments of the present application further provide a communication system.
  • the communication system includes at least one communication device applied to the second terminal and at least one communication device applied to the first terminal.
  • the embodiments of the present application further provide a computer-readable storage medium, which stores a computer program or instruction.
  • the computer-readable storage medium may include: a U disk, a mobile hard disk, a read-only memory, a random access memory, a magnetic disk or an optical disk, and other media that can store program codes.
  • the embodiment of the present application further provides a chip, including a processor, for supporting the communication device to realize the functions involved in the second terminal or the first terminal in the above method embodiment.
  • the chip is connected to a memory or the chip includes a memory, and the memory is used to store computer programs or instructions and data necessary for the communication device.
  • the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code.
  • a computer-usable storage media including but not limited to disk storage, CD-ROM, optical storage, etc.
  • the present application is a flowchart and/or block diagram of a method, device (system), and computer program product according to an embodiment of the present application. It should be understood that each process and/or box in the flowchart and/or block diagram, as well as the combination of the processes and/or boxes in the flowchart and/or block diagram, can be implemented by a computer program or instruction. These computer programs or instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate a device for implementing the functions specified in one or more processes in the flowchart and/or one or more boxes in the block diagram.
  • These computer programs or instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer-readable memory produce a manufactured product including an instruction device that implements the functions specified in one or more processes in the flowchart and/or one or more boxes in the block diagram.
  • B corresponding to A means that B is associated with A, and B can be determined according to A.
  • determining B according to A does not mean determining B only according to A, and B can also be determined according to A and/or other information.
  • the terminal device and/or the network device can perform some or all of the steps in the embodiment of the present application, and these steps or operations are only examples. In the embodiment of the present application, other operations or variations of various operations can also be performed. In addition, each step can be performed in a different order presented in the embodiment of the present application, and it is possible not to perform all the operations in the embodiment of the present application.

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

Abstract

La présente demande se rapporte au domaine technique des communications sans fil, et propose un procédé et un appareil d'indication de ressource, destinés à être utilisés pour indiquer une ressource temps-fréquence et transmettre un signal de référence de liaison latérale. Dans le procédé, un second terminal envoie un PSCCH à un premier terminal, le PSCCH transportant des SCI utilisées pour indiquer une ressource temps-fréquence d'un PSSCH. Le second terminal envoie un signal de référence de liaison latérale et le PSSCH au premier terminal, le PSSCH transportant uniquement un MAC CE. Dans ce qui précède, le signal de référence de liaison latérale est utilisé pour l'apprentissage de faisceau. Le PSCCH, le PSSCH et le signal de référence de liaison latérale sont envoyés dans le même créneau temporel. La solution décrite peut être utilisée pour un apprentissage de faisceau de transmission sur la base du signal de référence de liaison latérale dans la bande de fréquence FR2, ce qui assure le décapage d'un signal de référence de liaison latérale et de données associées à un canal dans un PSSCH, et évite la transmission d'un signal de référence de liaison latérale autonome.
PCT/CN2023/124548 2022-11-04 2023-10-13 Procédé et appareil d'indication de ressources Ceased WO2024093650A1 (fr)

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