WO2023040610A1 - 信道状态参数的传输方法和通信装置 - Google Patents

信道状态参数的传输方法和通信装置 Download PDF

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Publication number
WO2023040610A1
WO2023040610A1 PCT/CN2022/114435 CN2022114435W WO2023040610A1 WO 2023040610 A1 WO2023040610 A1 WO 2023040610A1 CN 2022114435 W CN2022114435 W CN 2022114435W WO 2023040610 A1 WO2023040610 A1 WO 2023040610A1
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WIPO (PCT)
Prior art keywords
channel state
state parameter
indication information
terminal device
multicast group
Prior art date
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PCT/CN2022/114435
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English (en)
French (fr)
Inventor
张懿
向铮铮
卢磊
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华为技术有限公司
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Priority to EP22868984.0A priority Critical patent/EP4383761A1/en
Publication of WO2023040610A1 publication Critical patent/WO2023040610A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0002—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
    • H04L1/0003—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate by switching between different modulation schemes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0026—Transmission of channel quality indication
    • 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
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L2001/0092—Error control systems characterised by the topology of the transmission link
    • H04L2001/0093—Point-to-multipoint
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present application relates to the communication field, and in particular, relates to a transmission method and a communication device of a channel state parameter.
  • the link adaptive method is adopted to improve the transmission efficiency and reliability of communication data.
  • the receiving end can determine the channel state information between the receiving end and the transmitting end by measuring the reference signal sent by the sending end, and feed it back to the sending end.
  • the sending end can determine the modulation, Coding mode, etc., so as to realize link self-adaptation.
  • the point-to-multipoint transmission of multicast communication can reduce the resource overhead of public information in the multicast group.
  • the multicast information sent by one sender needs to be received by multiple receivers. At present, there is still a lack of a channel state information feedback method suitable for multicast communication.
  • the present application provides a channel state parameter transmission method and a communication device, in order to improve the reliability of multicast communication.
  • a communication method includes: a first terminal device receives first indication information from a communication device, the first indication information is used to indicate a first channel state parameter, and the first channel state parameter is The minimum value of the channel state parameter corresponding to the first multicast group, the first multicast group includes multiple terminal devices receiving the same multicast information, and the multiple terminal devices include the first terminal device; the first terminal device measures A second channel state parameter is obtained from a reference signal from the communication device; if the second channel state parameter is smaller than the first channel state parameter, the first terminal device sends second indication information to the communication device, and the second indication information Used to indicate the second channel state parameter.
  • the receiving end of the multicast information feeds back to the sending end a channel state parameter that is less than the minimum value of the channel state parameter corresponding to the multicast group, so that the sending end can obtain the worst channel corresponding to the receiving end in the multicast group in time State, update the minimum value of the channel state parameter corresponding to the multicast group, so that the sender can process the multicast information to be sent based on the minimum value of the channel state parameter corresponding to the current multicast group, so that the multicast information can overcome the worst channel state channel interference, so that all terminal devices in the first multicast group can successfully receive the multicast information.
  • the reliability of multicast communication can be improved.
  • the method before the first terminal device receives the first indication information from the communication device, the method further includes: the first terminal device sends fourth indication information to the communication device, The fourth indication information is used to indicate a third channel state parameter, where the third channel state parameter is a measured channel state parameter corresponding to the first terminal device.
  • the method further includes: if the second channel state parameter is greater than the first channel state parameter, the first terminal device does not send the second indication information to the communication device.
  • the receiving end when the channel state parameter measured by the first terminal device is greater than the minimum value of the channel state parameter, the receiving end does not feed back the channel state parameter. It can reduce transmission resource overhead, improve resource utilization, and reduce power consumption of terminal equipment.
  • the method further includes: if the second channel state parameter is equal to the first channel state parameter, the first terminal device sends the second indication information to the communication device.
  • the first terminal device may feed back the channel state parameter to the communication device. So that the communication device can update the terminal device corresponding to the minimum value of the channel state parameter in time.
  • the method further includes: the first terminal device receives third indication information from the communication device, where the third indication information is used to indicate the first set, the The first set is a set of terminal devices corresponding to the first channel state parameter, the first multicast group includes the first set, and the first set does not include the first terminal device.
  • the first terminal device can obtain the terminal device corresponding to the minimum value of the channel state parameter in the first multicast group through the third indication information, and the first terminal device can determine whether it is the terminal device corresponding to the minimum value of the channel state parameter terminal device.
  • the method before the first terminal device receives the first indication information from the communication device, the method further includes: the first terminal device sends sixth indication information to the communication device , the sixth indication information is used to indicate the first channel state parameter, where the first channel state parameter is a measured channel state parameter corresponding to the first terminal device.
  • the method further includes: if the second channel state parameter is greater than the first channel state parameter, the first terminal device sends the second indication information to the communication device.
  • the first terminal device when the first terminal device is the terminal device corresponding to the minimum value of the channel state parameter, the first terminal device can feed back the measured channel state parameter to the communication device when the measured channel state parameter is greater than the minimum value of the channel state parameter.
  • the channel state parameter so that the communication device can update the minimum value of the channel state parameter corresponding to the first multicast group in time, improve the efficiency of link adaptation, and improve the reliability of communication.
  • the method further includes: if the second channel state parameter is equal to the first channel state parameter, the first terminal device does not send the second indication information to the communication device.
  • the first terminal device may not feed back the channel state parameter to the communication device, which can reduce transmission resource overhead, improve resource utilization, and reduce Power consumption of the terminal device.
  • the method further includes: the first terminal device receives fifth indication information from the communication device, where the fifth indication information is used to indicate the second set, the The second set is a set of terminal devices corresponding to the first channel state parameter, the first multicast group includes the second set, and the second set includes the first terminal device.
  • the first terminal device can obtain the terminal device corresponding to the minimum value of the channel state parameter in the first multicast group through the fifth indication information, so that the first terminal device can determine whether it is the terminal device corresponding to the minimum value of the channel state parameter terminal device.
  • the channel state parameter includes one or more of the following: channel quality indicator channel quality indicator (channel quality indicator, CQI), reference signal strength indication information ( reference signal strength indication (RSSI) or reference signal receiving power (reference signal receiving power, RSRP).
  • channel quality indicator channel quality indicator channel quality indicator, CQI
  • reference signal strength indication information reference signal strength indication (RSSI)
  • reference signal receiving power reference signal receiving power
  • the indication information used to indicate the channel state parameter is carried in the uplink control information (uplink control information, UCI), the measurement line control information sidelink control information ( sidelink control information (SCI) or physical sidelink shared channel (physical sidelink shared channel, PSSCH).
  • uplink control information uplink control information
  • SCI measurement line control information sidelink control information
  • PSSCH physical sidelink shared channel
  • the indication information used to indicate the minimum value of the channel state parameter corresponding to the first multicast group is carried in one or more of the following messages:
  • Radio resource control radio resource control
  • RRC Radio resource control
  • media access control media access control
  • MAC media access control
  • CE control element
  • DCI downlink control information
  • a communication method in a second aspect, includes:
  • the communication device sends first indication information to the first multicast group, where the first indication information is used to indicate a first channel state parameter, where the first channel state parameter is the minimum value of the channel state parameter corresponding to the first multicast group, the The first multicast group includes multiple terminal devices receiving the same multicast information;
  • the communication device receives second indication information from the first terminal device, the second indication information is used to indicate the second channel state parameter, the second channel state parameter is smaller than the first channel state parameter, and the plurality of terminal devices include The first terminal device.
  • the method further includes;
  • the communication device sends multicast information to the first multicast group, and the modulation mode and/or coding mode of the multicast information is determined according to the minimum value of the channel state parameter corresponding to the first multicast group.
  • the method before the communication device sends the first indication information to the first multicast group, the method further includes:
  • the communication device receives a plurality of indication information from the first multicast group, one indication information in the plurality of indication information is used to indicate a channel state parameter corresponding to a terminal device in the first multicast group, the first The channel state parameter is the minimum value among the channel state parameters indicated by the multiple indication information.
  • the plurality of indication information includes fourth indication information from the first terminal device, where the fourth indication information is used to indicate a third channel state parameter
  • the method further includes: the communication device sending third indication information to the first terminal device, where the third indication information is used to indicate a first set, and the first set is a set of terminal devices corresponding to the first channel state parameter , the first multicast group includes the first set, and the first set does not include the first terminal device.
  • the plurality of indication information includes fourth indication information from the first terminal device, where the fourth indication information is used to indicate a third channel state parameter
  • the method further includes: the communication device receives seventh indication information from the first terminal device, the seventh indication information is used to indicate a fourth channel state parameter, and the fourth channel state parameter is equal to the first channel state parameter.
  • the plurality of indication information includes sixth indication information from the first terminal device, where the sixth indication information is used to indicate the first channel state parameter
  • the method further includes: the communication device sending fifth indication information to the first terminal device, where the fifth indication information is used to indicate a second set, and the second set is a set of terminal devices corresponding to the first channel state parameter
  • the first multicast group includes the second set
  • the second set includes the first terminal device.
  • the plurality of indication information includes sixth indication information from the first terminal device, where the sixth indication information is used to indicate the first channel state parameter
  • the method further includes: the communication device receives eighth indication information from the first terminal device, the eighth indication information is used to indicate a fifth channel state parameter, and the fifth channel state parameter is greater than the first channel state parameter parameter.
  • the method further includes:
  • the communication device determines a second multicast group according to the first multicast group, the first multicast group includes the second multicast group, and the second multicast group does not include the second multicast group in the first multicast group.
  • the communication device determines the minimum value of the channel state parameter corresponding to the second multicast group according to the channel state parameter corresponding to the terminal device in the second multicast group.
  • the communication device determines the second multicast group according to the first multicast group, including:
  • the communication device removes the second terminal device from the first multicast group to obtain a second multicast group
  • the channel state parameters include one or more of the following:
  • the indication information for indicating the channel state parameter is carried in the uplink control information UCI, the measurement control information SCI or the physical measurement shared channel PSSCH.
  • the indication information used to indicate the minimum value of the channel state parameter corresponding to the first multicast group is carried in one or more of the following messages:
  • Downlink control information DCI Downlink control information DCI, radio resource control RRC message, medium access control element MAC CE, test link RRC message or SCI.
  • a communication device which includes: a transceiver unit, configured to receive first indication information from the communication device, where the first indication information is used to indicate a first channel state parameter, the first channel state parameter is the minimum value of the channel state parameter corresponding to the first multicast group, the first multicast group includes a plurality of terminal devices receiving the same multicast information, and the plurality of terminal devices include a first terminal device; a processing unit for measuring The second channel state parameter is obtained from the reference signal from the communication device; the transceiver unit is further configured to send second indication information to the communication device when the second channel state parameter is smaller than the first channel state parameter, the The second indication information is used to indicate the second channel state parameter.
  • the processing unit is further configured to determine not to send the second channel state parameter to the communication device when the second channel state parameter is greater than the first channel state parameter. indication information; and/or, the transceiver unit is further configured to send the second indication information to the communication device when the second channel state parameter is equal to the first channel state parameter
  • the transceiver unit is further configured to receive third indication information from the communication device, where the third indication information is used to indicate a first set, and the first set is A set of terminal devices corresponding to the first channel state parameter, the first multicast group includes the first set, and the first set does not include the first terminal device.
  • the transceiver unit before the transceiver unit receives the first indication information from the communication device, the transceiver unit is further configured to send fourth indication information to the communication device, the fourth indication The information is used to indicate a third channel state parameter, where the third channel state parameter is a measured channel state parameter corresponding to the first terminal device.
  • the transceiver unit is further configured to send the second indication information to the communication device when the second channel state parameter is greater than the first channel state parameter and/or, the processing unit is further configured to not send the second indication information to the communication device when the second channel state parameter is equal to the first channel state parameter.
  • the transceiver unit is further configured to receive fifth indication information from the communication device, where the fifth indication information is used to indicate a second set, and the second set is For the set of terminal devices corresponding to the first channel state parameter, the first multicast group includes the second set, and the second set includes the first terminal device.
  • the transceiver unit before the transceiver unit receives the first indication information from the communication device, the transceiver unit is further configured to send sixth indication information to the communication device, the sixth indication The information is used to indicate the first channel state parameter, where the first channel state parameter is a measured channel state parameter corresponding to the first terminal device.
  • the channel state parameter includes one or more of the following:
  • the indication information for indicating the channel state parameter is carried in the uplink control information UCI, the measurement control information SCI or the physical measurement shared channel PSSCH.
  • the indication information used to indicate the minimum value of the channel state parameter corresponding to the first multicast group is carried in one or more of the following messages:
  • Downlink control information DCI Downlink control information DCI, radio resource control RRC message, medium access control element MAC CE, test link RRC message or SCI.
  • a communication device which includes: a processing unit, configured to determine a first channel state parameter, where the first channel state parameter is the minimum value of the channel state parameter corresponding to the first multicast group, and the first channel state parameter is the minimum value of the channel state parameter corresponding to the first multicast group.
  • the multicast group includes multiple terminal devices receiving the same multicast information; the transceiver unit is used to send first indication information to the first multicast group, and the first indication information is used to indicate the first channel state parameter; the transceiver unit Also receiving second indication information from the first terminal device, the second indication information is used to indicate the second channel state parameter, the second channel state parameter is smaller than the first channel state parameter, and the plurality of terminal devices include the second channel state parameter a terminal device.
  • the transceiver unit is further configured to send multicast information to the first multicast group, and the modulation mode and/or coding mode of the multicast information is according to the first multicast group The minimum value of the channel state parameter corresponding to the multicast group is determined.
  • the transceiver unit before the transceiver unit sends the first indication information to the first multicast group, the transceiver unit is further configured to receive multiple messages from the first multicast group Indication information, one indication information in the plurality of indication information is used to indicate a channel state parameter corresponding to a terminal device in the first multicast group, and the first channel state parameter is the channel state indicated by the plurality of indication information The minimum value in the parameter.
  • the plurality of indication information includes fourth indication information from the first terminal device, where the fourth indication information is used to indicate a third channel state parameter
  • the transceiver unit is further configured to send third indication information to the first terminal device, where the third indication information is used to indicate a first set, the first set being a set of terminal devices corresponding to the first channel state parameter, the The first multicast group includes the first set, and the first set does not include the first terminal device.
  • the plurality of indication information includes fourth indication information from the first terminal device, where the fourth indication information is used to indicate a third channel state parameter
  • the transceiver unit is further configured to receive seventh indication information from the first terminal device, where the seventh indication information is used to indicate a fourth channel state parameter, where the fourth channel state parameter is equal to the first channel state parameter.
  • the plurality of indication information includes sixth indication information from the first terminal device, where the sixth indication information is used to indicate the first channel state parameter
  • the transceiver unit is further configured to send fifth indication information to the first terminal device, where the fifth indication information is used to indicate a second set, the second set being a set of terminal devices corresponding to the first channel state parameter, the The first multicast group includes the second set, and the second set includes the first terminal device.
  • the plurality of indication information includes fourth indication information from the first terminal device, where the fourth indication information is used to indicate the first channel state parameter
  • the transceiver unit is further configured to receive eighth indication information from the first terminal device, where the eighth indication information is used to indicate a fifth channel state parameter, where the fifth channel state parameter is equal to the first channel state parameter.
  • the processing unit is further configured to: determine a second multicast group according to the first multicast group, where the first multicast group includes the second multicast group , the second multicast group does not include the second terminal device in the first multicast group; the channel state parameter corresponding to the second terminal device is the minimum value of the channel state parameter corresponding to the first multicast group, And when the terminal device in the second multicast group does not correspond to the minimum value of the channel state parameter of the first multicast group, determine the second channel state parameter according to the channel state parameter corresponding to the terminal device in the second multicast group. The minimum value of the channel state parameter corresponding to the multicast group.
  • the processing unit is specifically configured to remove the second terminal device from the first multicast group to obtain a second multicast group
  • the channel state parameter includes one or more of the following:
  • the indication information for indicating the channel state parameter is carried in the uplink control information UCI, the measurement control information SCI or the physical measurement shared channel PSSCH.
  • the indication information used to indicate the minimum value of the channel state parameter corresponding to the first multicast group is carried in one or more of the following messages:
  • Downlink control information DCI Downlink control information DCI, radio resource control RRC message, medium access control element MAC CE, test link RRC message or SCI.
  • a terminal device including a processor.
  • the processor may implement the first aspect and the method in any possible implementation manner of the first aspect.
  • the communication device further includes a memory, and the processor is coupled to the memory, and can be used to execute instructions in the memory, so as to implement the above first aspect and the method in any possible implementation manner of the first aspect.
  • the communication device further includes a communication interface, and the processor is coupled to the communication interface.
  • the communication interface may be a transceiver, a pin, a circuit, a bus, a module or other types of communication interfaces, without limitation.
  • the terminal device is a terminal device.
  • the communication interface may be a transceiver, or an input/output interface.
  • the terminal device is a chip configured in a terminal device.
  • the communication interface may be an input/output interface
  • the processor may be a logic circuit.
  • the transceiver may be a transceiver circuit.
  • the input/output interface may be an input/output circuit.
  • a communication device including a processor.
  • the processor may implement the second aspect and the method in any possible implementation manner of the second aspect.
  • the communication device further includes a memory, and the processor is coupled to the memory, and can be used to execute instructions in the memory, so as to implement the above second aspect and the method in any possible implementation manner of the second aspect.
  • the communication device further includes a communication interface, and the processor is coupled to the communication interface.
  • the communication interface may be a transceiver, a pin, a circuit, a bus, a module or other types of communication interfaces, without limitation.
  • the communication device is a terminal device or a network device.
  • the communication interface may be a transceiver, or an input/output interface.
  • the communication device is a chip configured in a terminal device or a network device.
  • the communication interface may be an input/output interface
  • the processor may be a logic circuit.
  • the transceiver may be a transceiver circuit.
  • the input/output interface may be an input/output circuit.
  • a processor including: an input circuit, an output circuit, and a processing circuit.
  • the processing circuit is configured to receive a signal through the input circuit and transmit a signal through the output circuit, so that the processor executes the method in the first aspect or the second aspect and any possible implementation manner of the first aspect or the second aspect .
  • the above-mentioned processor can be one or more chips
  • the input circuit can be an input pin
  • the output circuit can be an output pin
  • the processing circuit can be a transistor, a gate circuit, a flip-flop and various logic circuits, etc. .
  • the input signal received by the input circuit may be received and input by, for example but not limited to, the receiver
  • the output signal of the output circuit may be, for example but not limited to, output to the transmitter and transmitted by the transmitter
  • the circuit may be the same circuit, which is used as an input circuit and an output circuit respectively at different times.
  • the embodiment of the present application does not limit the specific implementation manners of the processor and various circuits.
  • a computer program product includes: a computer program (also referred to as code, or an instruction), which, when the computer program is executed, causes the computer to perform the above-mentioned first aspect or the second aspect And the method in any possible implementation of the first aspect or the second aspect.
  • a computer program also referred to as code, or an instruction
  • a computer-readable storage medium stores a computer program (also referred to as code, or an instruction) which, when run on a computer, causes the computer to perform the above-mentioned first aspect or The second aspect and the method in any possible implementation manner of the first aspect or the second aspect.
  • a computer program also referred to as code, or an instruction
  • a communication system including the aforementioned multiple terminal devices and the aforementioned at least one communication device.
  • FIG. 1 is a schematic architecture of a communication system applicable to an embodiment of the present application
  • FIG. 2 is a schematic diagram of a communication system applicable to an embodiment of the present application
  • FIG. 3 is a schematic flowchart of a method for transmitting channel state parameters provided in Embodiment 1 of the present application;
  • FIG. 4 is a schematic flowchart of a method for transmitting channel state parameters provided in Embodiment 2 of the present application;
  • FIG. 5 is a schematic flow chart of determining whether to feed back a channel state parameter by a UE according to an embodiment of the present application
  • FIG. 6 is a schematic flowchart of a channel state parameter transmission method provided in Embodiment 3 of the present application.
  • FIG. 7 is a schematic block diagram of a communication device provided by an embodiment of the present application.
  • FIG. 8 is a schematic structural diagram of a terminal device provided by an embodiment of the present application.
  • FIG. 9 is a schematic structural diagram of a network device provided by an embodiment of the present application.
  • LTE long term evolution
  • LTE frequency division duplex frequency division duplex
  • FDD frequency division duplex
  • TDD time division duplex
  • UMTS universal mobile telecommunications system
  • WiMAX worldwide interoperability for microwave access
  • 5G fifth generation
  • 5G fifth generation
  • NR new wireless
  • vehicle-to-X V2X vehicle to other equipment
  • V2X can include vehicle to Internet (vehicle to network, V2N), vehicle to vehicle (vehicle to-vehicle, V2V), vehicle to infrastructure ( Vehicle to infrastructure, V2I), vehicle to pedestrian (vehicle to pedestrian, V2P), etc.
  • vehicle-to-vehicle communication long-term evolution technology LTE-vehicle, LTE-V
  • vehicle networking machine type communication
  • machine type communication machine type communication
  • MTC Internet of Things
  • FIG. 1 is a schematic diagram of a system architecture applicable to an embodiment of the present application. As shown in Figure 1, the system architecture may include the following network elements:
  • Terminal equipment may also be called user equipment (UE), such as UE1, UE2, UE3, and UE4 in FIG. 1 .
  • UE user equipment
  • the UE shown in FIG. 1 may execute the method provided in the embodiment of the present application.
  • the channel state parameter transmission method provided in the embodiment of the present application may be performed by a terminal device, and the terminal device may be the UE itself, or the terminal device may be configured in the UE.
  • the terminal device has a processing function, and a device that can control the UE to perform operations of receiving and transmitting communication information.
  • the terminal device may be a chip.
  • Wireless access network (radio access network, RAN) node modules, devices, or devices that implement access network functions based on wireless communication technology can be called RAN nodes.
  • RAN nodes are mainly used to provide UE wireless access to mobile networks.
  • the interface can manage wireless resources, provide access services for the UE, and then complete the forwarding of control signals and user data between the UE and the core network.
  • the RAN node can be a base station.
  • the eNB in the 4G system and the radio access network used in the 5G system are the next generation radio access network (NG-RAN), namely gNB, etc.
  • NG-RAN next generation radio access network
  • the UE can establish a communication link with the RAN node, and communicate through the cellular communication interface, that is, the User Equipment-Universal Mobile Telecommunications System Terrestrial Access Network (UE-UTRAN, Uu) interface, such as UE1 and UE4 shown in FIG. 1 .
  • UE1 and UE4 shown in FIG. 2 may be terminal devices within the coverage of the RAN node.
  • Direct communication can also be performed between UEs, and communication is performed through a direct communication interface, that is, proximity-based service communication (interface) 5 (proximity-based service communication (interface) 5, PC5).
  • UE1 and UE4, UE2, and UE2 and UE3 can communicate through the PC5 interface.
  • FIG. 1 UE1 and UE4, UE2, and UE2 and UE3 can communicate through the PC5 interface.
  • UEs performing PC5 interface communication may be within the coverage of the RAN, such as UE1 and UE4, or outside the coverage of the RAN, such as UE2 and UE3. It can also be two UEs communicating through the PC5 interface, one UE is within the coverage of the RAN, and the other UE is outside the coverage of the RAN, such as UE1 and UE2.
  • the Uu interface may be an interface between the UE and the access network device.
  • the access network device may be a base station in UMTS, an evolved base station (evolutional node B, eNodeB or eNB) in a 4G network, a next generation base station (next generation node base station, gNodeB or gNB) in a 5G network, Or the base stations in the subsequent evolution network are not limited.
  • the communication may be referred to as Uu communication or Uu interface communication for short.
  • the PC5 interface may be an interface between two UEs, and may be used to complete signaling and data transmission between the control plane and the user plane, ProSe discovery, direct communication, and the like.
  • the PC5 interface may be used for short-distance direct communication or direct connection communication between UEs, and may be referred to as PC5 communication, PC5 interface communication or sidelink communication for short.
  • Access and mobility management function (access and mobility management function, AMF): mainly used for mobility management and access management.
  • Session management function (session management function, SMF): mainly used for session management, UE network interconnection protocol (internet protocol, IP) address allocation and management, selection of manageable user plane functions, policy control, or charging function interface Endpoints and downlink data notifications, configuration of routing information for user plane functions, etc.
  • SMF session management function
  • PCF Policy control function
  • Unified data management used to handle user identification, access authentication, registration, or mobility management.
  • UPF User plane function
  • QoS quality of service
  • Application function It mainly supports interaction with the 3rd generation partnership project (3GPP) core network to provide services, for example, affecting data routing decisions, policy control functions, or sending data to the network side Provide some services of third parties.
  • 3GPP 3rd generation partnership project
  • Network exposure function which connects core network elements and external application servers, and provides services such as authentication and data forwarding when external application servers initiate service requests to the core network.
  • Data network (data network, DN): a network used to provide data transmission, for example, Internet network, etc.
  • Unified data repository used to provide storage and retrieval for PCF policies, open structured data storage and retrieval, and user information storage for application function requests.
  • the terminal equipment in the embodiments of the present application may also be referred to as UE, access terminal, subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device.
  • the terminal device in the embodiment of the present application may be a mobile phone, a tablet computer, a computer with a wireless transceiver function, a virtual reality (virtual reality, VR) terminal device, an augmented reality (augmented reality, AR) terminal device, a wireless Terminals, wireless terminals in autonomous driving, wireless terminals in telemedicine, wireless terminals in smart grid, wireless terminals in transportation security, wireless terminals in smart cities, wireless terminals in smart homes, cellular phones, cordless phones , session initiation protocol (session initiation protocol, SIP) telephone, wireless local loop (wireless local loop, WLL) station, personal digital assistant (personal digital assistant, PDA), handheld device with wireless communication function, computing device, vehicle-mounted device , wearable devices, terminal devices in the 5G network or terminal
  • the RAN node in this embodiment of the present application may be a device in an access network that has a wireless transceiver function.
  • a RAN node can also be called a network device or a RAN device, and the RAN node includes but is not limited to: a base station, an evolved node B (evolved node B, eNB), a radio network controller (radio network controller, RNC), a node B (node B, NB), base station controller (base station controller, BSC), base transceiver station (base transceiver station, BTS), home base station (for example, home evolved nodeB, or home node B, HNB), baseband unit (baseband unit, BBU), wireless fidelity (wireless fidelity, WIFI) system in the access point (access point, AP), wireless relay node, wireless backhaul node, transmission point (transmission point, TP) or sending and receiving point (transmission and reception point, TRP) and so on.
  • RNC radio network controller
  • the device may also be a network node constituting a gNB or a transmission point, such as a baseband unit (BBU), or a distributed unit (distributed unit, DU). It should be understood that the present application does not limit the specific form of the network device.
  • a network node constituting a gNB or a transmission point, such as a baseband unit (BBU), or a distributed unit (distributed unit, DU).
  • BBU baseband unit
  • DU distributed unit
  • V2X supports two communication modes, PC5 interface communication and Uu interface communication.
  • the PC5 interface supports sidelink SL communication
  • the physical channel of NR V2X SL communication includes the physical sidelink control channel (physical sidelink control channel, PSCCH) carrying control information, and the PSSCH carrying data load and additional control information 1.
  • a physical sidelink broadcast channel (physical sidelink broadcast channel, PSBCH) carrying synchronization information and a physical layer sidelink feedback channel (physical sidelink feedback channel, PSFCH) carrying feedback information.
  • PSBCH physical sidelink broadcast channel
  • PSFCH physical layer sidelink feedback channel
  • V2X SL data is carried on PSSCH in the form of transport block (TB) and associated with SCI.
  • the SCI indicates the resources used to carry the TB on the PSSCH and the information required to decode the TB.
  • the PSCCH is sent together with the PSSCH.
  • the transmission of the SCI is divided into two levels, the first level SCI is carried on the PSCCH, and the second level SCI is carried on the PSSCH.
  • the second-level SCI contains additional control information for the receiving UE.
  • the introduction of the second-level SCI increases the flexibility of SCI design, thereby further supporting unicast, multicast and broadcast transmission.
  • the first-level SCI includes indications of the frequency domain resources and time domain resources of the transmitted TB, indications of the corresponding PSSCH priority, the format and size of the second-level SCI, and the modulation and coding scheme (modulation and coding scheme) corresponding to the data transmitted by the PSSCH , MCS).
  • the MCS is specifically indicated by the corresponding MCS index in the MCS table.
  • the default MCS table and two additional MCS tables can be configured or pre-configured in each resource pool.
  • the demodulation reference signal (demodulation reference signal, DMRS) of the PSSCH can be carried on different symbols in the PSSCH time slot.
  • the time pattern of the DMRS may be indicated by a first-level SCI.
  • V2X SL uses link adaptation to improve the efficiency and reliability of unicast transmission.
  • link adaptation can be adjusted according to the channel state information fed back from the receiving UE to the sending UE, and the channel state information can include CQI and rank indicator (rank indicator, RI) and so on.
  • the link adaptive technology can adjust the MCS suitable for transmission according to the quality of the radio frequency link.
  • the data receiving UE determines the CQI by measuring the channel state information-reference signal (CSI-RS) sent by the sending UE on the PSSCH.
  • the CQI can be determined according to the measurement result of measuring the CSI-RS and the corresponding CQI table.
  • the CQI may indicate the highest modulation and coding scheme applicable to the current channel, and the UE at the sending end may refer to the CQI to select an MCS for data to be transmitted.
  • Unicast transmission in V2X SL can also adjust the number of PSSCH streams sent in multi-antenna transmission through rank adaptation to improve spectrum efficiency.
  • the receiving UE can determine the RI corresponding to the rank of the measured SL channel according to the channel measurement information of the SL CSI-RS transmitted from one or more antenna ports of the transmitting UE.
  • the rank of the channel determines the number of streams that the channel can support.
  • PSSCH transmission in V2X SL supports up to two streams, and RI can be equal to 1 or 2.
  • the present application is not limited thereto, and the embodiments of the present application may also be applied to the transmission of multiple streams of the PSSCH.
  • RI can also be determined by CQI.
  • the combination of CQI and RI represents the CSI that can be fed back from the receiving UE to the sending UE for link and rank adaptation of unicast PSSCH transmission.
  • V2X SL does not support precoding matrix indicator (PMI) feedback, and the sending UE can perform open-loop multi-antenna SL transmission according to the CQI and RI fed back by the receiving UE.
  • PMI precoding matrix indicator
  • the present application is not limited thereto, and the embodiments of the present application may also be applied to a scenario of receiving PMI fed back by the UE.
  • Unicast communication refers to a point-to-point communication method between a sending end and a receiving end.
  • the signal sent by the sending end may include the identification of the sending end (that is, the identification of the source device) and the identification of the target receiving end.
  • the signal is received by the target receiving end , so as to realize point-to-point communication.
  • unicast communication can include point-to-point communication between network devices and terminal devices, or point-to-point communication between terminal devices and terminal devices in V2X SL. But the present application is not limited thereto.
  • Multicast communication refers to a point-to-multipoint communication mode between a sender and multiple receivers.
  • the signal sent by the sender can include the identifier of the sender (namely, the identifier of the source device) and the identifier of the target group. Multiple receivers of the group receive the signal, thereby realizing point-to-multipoint communication.
  • the multicast communication may include the multicast communication of the network device, that is, the point-to-multipoint communication in which the network device sends a multicast signal to multiple terminal devices, and the network device may assign a group identifier to the multiple terminal devices for receiving the multicast Signal.
  • the network device may send a multicast signal with the group identifier of the terminal device, and UE1 and UE4 may receive the multicast signal based on the group identifier.
  • multicast communication may include V2X SL multicast communication, that is, point-to-multipoint communication in which one terminal device sends multicast signals to multiple terminal devices.
  • the sending terminal device and the plurality of receiving terminal devices may belong to the same multicast group, and the receiving terminal device may receive multicast signals in the multicast group based on the identifier of the multicast group.
  • the present application is not limited thereto.
  • UE1, UE2, UE3, and UE5 shown in FIG. 2 may belong to the same multicast group, UE2 sends a multicast signal with the group identifier, and UE1, UE3, and UE5 may receive the multicast signal based on the group identifier.
  • the division of multicast groups can be based on the location of terminal devices or the distance between terminal devices. For example, terminal devices within the same geographic location are classified into the same multicast group. Or the terminal devices whose distance between the terminal devices is smaller than the preset threshold value are classified into the same multicast group.
  • the multicast group can be divided by the sending end device (such as network device or terminal device) of the multicast signal based on the received signal strength of the terminal device, for example, the terminal device whose received signal strength is within a preset range for the same multicast group. But the present application is not limited thereto.
  • the channel state information feedback method of unicast communication is mainly considered.
  • the channel state information feedback method of unicast communication is simply used, when the number of receiving ends of multicast communication is large, the channel The resource overhead of status information is large, which will affect the throughput of system communication data.
  • the embodiment of this application proposes that the receiving end in the multicast group feeds back the measured channel state parameter to the sending end when the measured channel state parameter is less than the minimum value of the channel state parameter corresponding to the multicast group , so that the sender can update the minimum value of the channel state parameter corresponding to the multicast group, and process the multicast information to be sent based on the minimum value of the channel state parameter corresponding to the current first multicast group, so that the first multicast group terminal devices can successfully receive the multicast information.
  • FIG. 3 is a schematic flowchart of a communication method 300 provided by an embodiment of the present application.
  • the communication method shown in FIG. 3 can be executed by a first terminal device, and the first terminal device belongs to a first multicast group.
  • the communication device is a sending device for sending multicast information to the first multicast group
  • the first multicast group includes N terminal devices receiving the same multicast information, that is, in In the point-to-multipoint multicast communication mode, the communication device is used as the sending device of the multicast information, and the N terminal devices are used as the receiving devices of the multicast information, and a multicast information sent by the communication device, the first multicast group All the N terminal devices within need to receive the multicast information.
  • N is a positive integer
  • the N terminal devices include the first terminal device.
  • the terminal device provided in the embodiment of the present application may be configured in a terminal device or the terminal device may be the terminal device itself.
  • the communication device may be an access network device, or may be a terminal device. This application is not limited to this.
  • the access network device may be configured on the RAN node, or the access network device may be the RAN node itself.
  • the first terminal device receives first indication information from the communication device, where the first indication information is used to indicate a first channel state parameter, where the first channel state parameter is the minimum value of the channel state parameter corresponding to the first multicast group .
  • the communication device may determine the minimum value of the channel state parameter corresponding to the first multicast group based on the channel state parameter corresponding to the terminal device of the first multicast group, that is, the minimum value of the channel state parameter corresponding to the terminal device in the first multicast group .
  • the communication device receives N pieces of indication information from the first multicast group, and one of the N pieces of indication information is used to indicate a channel state parameter corresponding to a terminal device of the first multicast group.
  • the N pieces of indication information may be sent to the communication device by the N terminal devices at the same time or at different times, which is not limited in this application.
  • the communication device may determine the channel state parameters corresponding to the N terminal devices in the first multicast group according to the N indication information, and determine that the minimum of the channel state parameters corresponding to the N terminal devices is the first channel state parameter, therefore, the minimum value of the channel state parameter corresponding to the first multicast group is the first channel state parameter.
  • the channel state parameter includes but not limited to one of CQI, RSSI or RSRP, or the channel state parameter includes two or all of them.
  • the channel state parameter corresponding to the terminal device refers to a parameter used to characterize the channel state between the terminal device and the communication device.
  • the terminal device can measure the reference signal from the communication device to obtain channel information, and determine the channel state parameter corresponding to the terminal device based on the channel information.
  • the channel state parameter can represent the channel state between the terminal device and the communication device. The larger the channel state parameter is, the greater the channel state parameter is. The better the state is; the smaller the channel state parameter is, the worse the channel state is.
  • the N pieces of indication information may be CSIs sent by the N terminal devices to the communication device, and each CSI includes a channel state parameter corresponding to the terminal devices.
  • the indication information used to indicate the channel state parameter may be carried in UCI, SCI or PSSCH sent by the terminal device.
  • the communication device sends the first indication information to the first multicast group.
  • the minimum value of the channel state parameter corresponding to the first multicast group, that is, the first channel state parameter is notified through the first indication information.
  • the communication device may determine the modulation mode and/or coding mode of the multicast information sent to the first multicast group according to the minimum value of the channel state parameter corresponding to the first multicast group. So that the terminal devices in the first multicast group can successfully receive the multicast information.
  • the multicast information may include multicast control information and/or multicast service data.
  • the terminal devices in the first multicast group receive the first indication information from the communication device, and determine the minimum value of the channel state parameter corresponding to the first multicast group as the first channel state parameter according to the first indication information.
  • the terminal device may determine whether to send the measured channel state parameter based on the minimum value of the channel state parameter corresponding to the first multicast group.
  • the first indication information may be one or more of the following:
  • RRC message RRC message, MAC CE, DCI or SCI.
  • the first indication information may be multicast information.
  • the first terminal device measures a reference signal from the communication device to obtain a second channel state parameter.
  • the first terminal device may periodically or semi-statically measure the reference signal from the communication device to obtain the channel state parameter.
  • the first terminal device may be triggered by the communication device (for example, the first terminal device is triggered by instruction information sent to the first terminal device), and measure the reference signal of the communication device once.
  • the present application is not limited thereto.
  • the reference signal of the above communication device may include but not limited to one or more of the following:
  • CSI-RS synchronization signals
  • SS synchronization signals
  • PBCH physical broadcast channel
  • DMRS demodulation reference signal
  • the terminal device may measure a reference signal from the communication device to obtain channel information, and determine a channel state parameter corresponding to the terminal device based on the channel information, and the channel state parameter may represent a channel state between the terminal device and the communication device.
  • the channel state parameter is CQI
  • the terminal device measures the channel information obtained from the reference signal, such as channel path loss, delay spread and other information used to characterize channel characteristics, and the terminal device determines the channel information applicable to the channel according to the channel information.
  • CQI where the CQI is used to indicate one or more of the modulation order, channel coding rate, or coding efficiency applicable to the channel.
  • the first terminal device sends second indication information to the communication device, where the second indication information is used to indicate the second channel state parameter.
  • the communication device receives the second indication information from the first terminal device.
  • the communication device may determine, according to the second indication information, that the channel state parameter corresponding to the first terminal device is changed to a second channel state parameter.
  • the communication device may determine the minimum value of the channel state parameter corresponding to the first multicast group according to the channel state parameter corresponding to the terminal device in the current first multicast group. If only the channel state parameter corresponding to the first terminal device is changed to the second channel state parameter, the communication device may determine that the minimum value of the channel state parameter corresponding to the first multicast group is changed to the second channel state parameter, and notify the first An end device in a multicast group.
  • the receiving end of the multicast information feeds back to the sending end a channel state parameter that is less than the minimum value of the channel state parameter corresponding to the multicast group, so that the sending end can obtain the worst channel corresponding to the receiving end in the multicast group in time State, update the minimum value of the channel state parameter corresponding to the multicast group, so that the sender can process the multicast information to be sent based on the minimum value of the channel state parameter corresponding to the multicast group, so that the multicast information can overcome the worst channel state. channel interference, so that all terminal devices in the first multicast group can successfully receive the multicast information.
  • the reliability of multicast communication can be improved.
  • the second channel state parameter is greater than or equal to the first channel state parameter
  • the first terminal device may determine whether to send the second indication based on whether the first terminal device is a terminal device corresponding to the first channel state parameter or not. information.
  • the first terminal device is not the terminal device corresponding to the first channel state parameter.
  • the first terminal device does not send the second indication information to the communication device.
  • the embodiment of the present application proposes that the first terminal device not send the second indication information to the communication device, and notify the second channel state parameter.
  • the transmission resource overhead can be reduced, the resource utilization rate can be improved, and the power consumption of the terminal device can be reduced.
  • the first terminal device sends the second indication information to the communication device.
  • the first terminal device may use the second indication information to notify The communication device, so that the communication device determines the terminal device corresponding to the minimum value of the channel state parameter.
  • the first terminal device may determine that the first terminal device is not a terminal device corresponding to the first channel state parameter according to but not limited to the following implementation manners.
  • the first terminal device may determine that the first terminal device is not the terminal device corresponding to the first channel state parameter according to the last channel state parameter sent by the first terminal device to the communication device.
  • the first terminal device before the first terminal device receives the first indication information, the first terminal device sends fourth indication information to the communication device, where the fourth indication information is used to indicate a third channel state, and the third channel state is measured
  • the corresponding channel state parameter is installed on the first terminal.
  • the above N pieces of indication information include the fourth indication information.
  • the first terminal device After the first terminal device receives the first indication information, it can determine that the third channel state parameter sent last time is not equal to the first channel state parameter, then the first terminal device determines that it is not the terminal device corresponding to the first channel state parameter .
  • the first terminal device may determine that the first terminal device is not the terminal device corresponding to the first channel state parameter according to the set of terminal devices corresponding to the minimum value of the channel state parameter indicated by the communication device.
  • the communication device sends third indication information to the first multicast group, the third indication information is used to indicate the first set, the first set is the set of terminal devices corresponding to the first channel state parameter, the first group
  • the broadcast group includes the first set, which does not include the first terminal device.
  • the first terminal device receives the third indication information, and according to the first set, determines that the first terminal device is not the terminal device corresponding to the first channel state parameter.
  • the third indication information includes identification information of the terminal device corresponding to the first channel state parameter.
  • the terminal devices in the first multicast group may determine the first set according to the identification information of the terminal devices indicated by the third indication information.
  • the first indication information and the third indication information sent by the communication device to the first multicast group may be carried in the same multicast message and sent to the first multicast group, or may be carried in different messages and sent to the first multicast group . This application is not limited to this.
  • the second terminal device is a terminal device corresponding to the first channel state parameter.
  • the first terminal device sends the second indication information to the communication device.
  • the first terminal device is a terminal device corresponding to the first channel state parameter. If the channel state parameter measured by the first terminal device is greater than the first channel state parameter, it may be considered that the minimum value of the channel state parameter may change.
  • the first terminal device needs to send the second indication information to the communication device, so that the communication device can determine whether the minimum value of the channel state parameter changes, so as to update the minimum value of the channel state parameter.
  • the second channel state parameter is greater than the first channel state parameter
  • the first terminal device sends the second indication information to the communication device.
  • the communication device determines that the channel state parameter corresponding to the first terminal device is updated to the second channel state parameter, and the communication device determines the minimum value of the channel state parameter according to the channel state parameter corresponding to the current first multicast group . If the first multicast group also includes at least one terminal device corresponding to the first channel state parameter, and the first channel state parameter is the minimum value, the minimum value of the channel state parameter corresponding to the first multicast group is still the first channel state parameter. If the first multicast group does not include a terminal device corresponding to the first channel state parameter, the communication device may determine the current minimum value of the channel state parameter corresponding to the first multicast group, and notify the first multicast group.
  • the first terminal device does not send the second indication information to the communication device.
  • the first terminal device does not send the second indication information to the communication device, which can reduce transmission resource overhead, improve resource utilization, and reduce Power consumption of the terminal device.
  • the first terminal device may determine that the first terminal device is a terminal device corresponding to the first channel state parameter according to but not limited to the following implementation manners.
  • the first terminal device may determine that the first terminal device is the terminal device corresponding to the first channel state parameter according to the last channel state parameter sent by the first terminal device to the communication device.
  • the first terminal device before the first terminal device receives the first indication information, the first terminal device sends sixth indication information to the communication device, where the sixth indication information is used to indicate the first channel state, and the first channel state is measured The channel state parameters corresponding to the first terminal device.
  • the above N pieces of indication information include the sixth indication information.
  • the first terminal device may determine that the latest transmission is the first channel state parameter, and then the first terminal device determines that the first terminal device is a terminal device corresponding to the first channel state parameter.
  • the first terminal device may determine that the first terminal device is the terminal device corresponding to the first channel state parameter according to the set of terminal devices corresponding to the minimum value of the channel state parameter indicated by the communication device.
  • the communication device sends fifth indication information to the first multicast group, where the fifth indication information is used to indicate a second set, the second set is a set of terminal devices corresponding to the first channel state parameter, and the first group
  • the broadcast group includes the second set, which includes the first terminal device.
  • the first terminal device receives the fifth indication information, and determines, according to the second set, that the first terminal device is a terminal device corresponding to the first channel state parameter.
  • the first indication information and the fifth indication information sent by the communication device to the first multicast group may be carried in the same multicast message and sent to the first multicast group, or may be carried in different messages and sent to the first multicast group . This application is not limited to this.
  • the communication device determines the second multicast group according to the first multicast group, the first multicast group includes the second multicast group, and the second multicast group does not include the second terminal in the first multicast group device, if the channel state parameter corresponding to the second terminal device is the minimum value of the channel state parameter corresponding to the first multicast group, and the second multicast group does not include the minimum value of the channel state parameter corresponding to the first multicast group.
  • the communication device determines the minimum value of the channel state parameter corresponding to the second multicast group according to the channel state parameter corresponding to the terminal device in the second multicast group.
  • the second terminal device needs to withdraw from the multicast group.
  • the second terminal device's withdrawal from the multicast group may be determined by the communication device based on the service. For example, the second terminal device no longer provides multicast services, or the second terminal device withdraws
  • the multicast group may be determined by the communication device based on the location of the second terminal device, for example, the location of the second terminal device exceeds the coverage of the communication device for sending multicast information, etc., but the present application is not limited thereto.
  • the communication device removes the second terminal device from the first multicast group to obtain a second multicast group, and the second multicast group includes a plurality of terminal devices.
  • the communication device needs to determine whether to re-determine the channel state parameter min. If the second multicast group includes a terminal device corresponding to the first channel state parameter, the first channel state parameter is still the minimum value of the channel state parameter corresponding to the second multicast group. If the terminal device corresponding to the first channel state parameter is not included in the second multicast group, the communication device determines the minimum value of the channel state parameter corresponding to the second multicast group according to the channel state parameter corresponding to the terminal device in the second multicast group. value, and notify the second multicast group.
  • the receiving end when the measured channel state parameter in the multicast group is less than the minimum value of the channel state parameter corresponding to the multicast group, the receiving end notifies the sending end of the multicast information, so that the sending end can update The minimum value of the channel state parameter corresponding to the multicast group, and based on the minimum value of the channel state parameter corresponding to the current first multicast group, process the multicast information to be sent, so that all receivers in the multicast group can successfully receive The multicast information. Further, if the receiving end is not the receiving end corresponding to the minimum value of the channel state parameter, when the channel state parameter measured by the receiving end is greater than the minimum value of the channel state parameter, the receiving end does not feed back the channel state parameter.
  • the receiving end is the receiving end corresponding to the minimum value of the channel state parameter, when the channel state parameter measured by the receiving end is equal to the minimum value of the channel state parameter, the receiving end does not feed back the channel state parameter.
  • the transmission resource overhead can be reduced, the resource utilization rate can be improved, and the power consumption of the terminal device can be reduced.
  • FIG. 4 is a schematic flowchart of a communication method 400 provided by an embodiment of the present application.
  • the communication device is used as an example of a RAN node or configured in a RAN node to implement the method provided by the embodiment shown in FIG. 4.
  • the RAN nodes may be replaced by communication devices.
  • the terminal device is a UE or the terminal device is configured in a UE to implement the method provided in the embodiment shown in FIG. 4 as an example.
  • UE can be replaced by terminal device, for example, UE1 in the embodiment shown in FIG. 4 can be replaced by terminal device 1, UE2 can be replaced by terminal device 2, UE3 can be replaced by terminal device 3, and so on.
  • the terminal device may be a chip.
  • the RAN node serves as the sender of the multicast information of the first multicast group
  • the first multicast group includes 5 UEs, such as UE1, UE2, UE3, UE4 and UE5.
  • UE1 and UE2 in the first multicast group are shown in FIG. 4 , and other UEs may refer to the implementation manners of UE1 or UE2 for specific implementation. For the sake of brevity, details are not repeated here.
  • UE1 sends indication information A to the RAN node, where the indication information A is used to indicate the CQI 1 corresponding to UE1.
  • the RAN node receives the indication information A from UE1.
  • CQI is an example of a channel state parameter.
  • UE1 can measure the reference signal of the RAN node to obtain CQI_1. Specifically, UE1 may measure the reference signal to obtain channel information between UE1 and the RAN node, and determine CQI_1 corresponding to the channel information according to the channel information. A smaller value of the CQI indicates a worse channel state, and a larger value of the CQI indicates a better channel state.
  • One CQI corresponds to one modulation scheme (such as modulation order, etc.) and/or one coding scheme (such as channel coding code rate and/or coding efficiency, etc.).
  • the indication information A may be carried in the UCI sent by the UE1 to the RAN node.
  • UE1 may send the indication information A to the RAN node after accessing the RAN node, or UE1 may send the indication information A to the RAN node after comparing CQI_1 with the minimum value of the CQI corresponding to the current first multicast group.
  • S402 UE2 sends indication information B to the RAN node, where the indication information B is used to indicate the CQI_2 corresponding to UE2.
  • the RAN node receives the indication information B from UE2.
  • UE2 may send the indication information B to the RAN node after accessing the RAN node, or UE2 may send the indication information B to the RAN node after comparing CQI_2 with the minimum value of the CQI corresponding to the current first multicast group.
  • the indication information B may be carried in the UCI sent by the UE2 to the RAN node.
  • the RAN node sends indication information C to the first multicast group, where the indication information C is used to indicate CQI_1, where CQI_1 is the minimum value of the CQI corresponding to the first multicast group.
  • the UEs in the first multicast group receive the indication information C.
  • the RAN node determines the CQI corresponding to each UE in the first multicast group according to the latest indication information sent by the UE in the first multicast group, and determines the minimum value of the CQI as CQI_1.
  • the CQI corresponding to UE1 in the first multicast group is 3 (that is, CQI_1)
  • the CQI corresponding to UE2 is 5 (that is, CQI_2)
  • the CQI corresponding to UE3 is 8
  • the CQI corresponding to UE4 is 3
  • the CQI corresponding to UE5 is 10.
  • the minimum CQI value is 3, that is, CQI_1
  • the RAN node notifies the first multicast group through indication information C
  • the minimum CQI corresponding to the first multicast group is 3.
  • the RAN node sends indication information D to the first multicast group, where the indication information D is used to indicate a first set, and the first set includes UEs corresponding to CQI_1.
  • CQI_1 3
  • the CQIs corresponding to UE1 and UE4 are both 3
  • the first set corresponding to CQI_1 includes UE1 and UE4
  • the RAN node can send indication information D, which can include identification information of UE1 and the identification information of UE4, the UE in the first multicast group receives the indication information D and can determine the UE corresponding to the minimum CQI.
  • the indication information C may be carried in the RRC message, MAC CE or DCI sent by the RAN node to the first multicast group.
  • the RAN node sends multicast information to the first multicast group, and the MCS of the multicast information is determined according to the CQI_1.
  • the RAN node may determine the MCS of the multicast information sent to the first multicast group according to the CQI_1.
  • the modulation method corresponding to CQI_1 is 16QAM in quadrature amplitude modulation (QAM), and the RAN node can determine that the multicast information can adopt the 16QAM modulation method, so as to expect the UE with the worst channel state in the first multicast group
  • the multicast information can be received.
  • the RAN node may determine that the multicast information selects a modulation mode with a smaller modulation order to improve the anti-channel interference capability of the multicast information, but the present application is not limited thereto.
  • UE2 measures the reference signal from the RAN node to obtain CQI_3.
  • UE2 determines that CQI_3 is greater than CQI_1, and UE2 does not send indication information for indicating CQI_3.
  • UE2 can determine that UE2 is not the UE corresponding to CQI1 according to the last sent CQI, that is, CQI_2, or according to the first set, and the CQI_3 measured by UE2 is greater than CQI_2. Since the minimum CQI corresponding to the first multicast group does not change, UE2 does not Send indication information for indicating CQI_3.
  • the transmission resource overhead can be reduced, the resource utilization rate can be improved, and the power consumption of UE2 can be reduced.
  • UE2 sends indication information to the RAN node to indicate the CQI. If the CQI is less than CQI_1, the RAN node can re-determine the minimum CQI of the first multicast group and notify the first multicast group; if the CQI is equal to CQI_1, the RAN node can update the UE corresponding to the minimum CQI. Optionally, the set of UEs corresponding to the updated minimum CQI of the first multicast group may be notified.
  • UE1 measures the reference signal from the RAN node to obtain CQI_4.
  • UE1 sends indication information E to the RAN node, where the indication information E is used to indicate CQI_4.
  • CQI_4 is greater than CQI_1.
  • the RAN node receives the indication information E from UE1.
  • UE1 can determine that UE1 is the UE corresponding to CQI1 according to the last sent CQI, that is, CQI_1, or according to the first set. The CQI is changed to CQI_4.
  • UE1 If the CQI measured by UE1 is less than CQI_1, UE1 also sends indication information to the RAN node, that is, when the CQI of the UE corresponding to the minimum CQI changes, the UE will notify the RAN node so that the RAN node can determine whether to update the first multicast The minimum CQI corresponding to the group.
  • the UE in the multicast group can determine whether to send the updated CQI process as shown in Figure 5, UEi measures CQIi,t, and CQIi,t represents the CQI obtained by UEi's t-th measurement.
  • CQIi,t is different from the CQIi,t-1 obtained in the last measurement, or the CQI obtained by UEi changes, if UEi is the minimum CQI, that is, the UE corresponding to CQImin, UEi sends CQIi, if UEi is not corresponding to CQImin
  • CQIi ⁇ CQImin For UE, if CQIi ⁇ CQImin, UEi sends CQIi, and if CQIi>CQImin, UE does not send CQIi.
  • the RAN node After receiving the indication information E, the RAN node determines that the CQI corresponding to UE1 is changed to CQI_4.
  • the CQI corresponding to the current first multicast group of the RAN node determines the minimum value of the CQI corresponding to the first multicast group. If the minimum value is not CQI_1, the RAN node sends indication information to the first multicast group, indicating The updated minimum value of the CQI corresponding to the first multicast group. If the minimum value is still CQI_1, the RAN node does not send indication information to the first multicast group, and updates the minimum value of CQI corresponding to the first multicast group.
  • the RAN node stores the first set, that is, the set of UEs corresponding to CQI_1.
  • the first set includes UE1 and UE4.
  • the RAN node receives the indication information E, it determines that the CQI corresponding to UE1 is changed to CQI_4, the RAN node removes UE1 from the first set, and the first set is not an empty set, and the RAN node determines that the minimum CQI corresponding to the first multicast group remains unchanged.
  • the RAN node determines the minimum CQI corresponding to the first multicast group according to the current CQI corresponding to the first multicast group. And determine the set of UEs corresponding to the minimum CQI. Optionally, the RAN node sends the set of UEs corresponding to the minimum CQI to the first multicast group.
  • the RAN node updates CQImin and notifies the first multicast group.
  • the RAN node adds the UE corresponding to CQImin, for example, the RAN node stores the UE set corresponding to CQImin, then the RAN node adds UEi to the UE set.
  • the RAN node determines the updated CQImin according to the CQI corresponding to the current first multicast group, or, in another embodiment, the RAN node stores the UE set corresponding to the CQImin, and the RAN node will UEi is deleted from the UE set, if the UE set is not empty, CQImin remains unchanged; if the UE set is empty, the RAN node updates CQImin, and notifies the first multicast group, and the UE set corresponding to CQImin, optional Specifically, the UE set corresponding to the updated CQImin of the first multicast group is notified.
  • the following describes the operation of the RAN node when the UE included in the first multicast group changes.
  • the RAN node When the UE in the first multicast group exits the multicast group, the RAN node removes the UE from the first multicast group to obtain the second multicast group.
  • the second multicast group includes multiple UEs.
  • the RAN node judges whether the UE corresponds to the minimum CQI (for example, the current minimum CQI is CQI_1). If the UE corresponds to the minimum CQI, the following embodiments may be adopted but not limited to.
  • the RAN node determines the minimum CQI corresponding to the second multicast group according to the CQI corresponding to the UE in the current second multicast group. If the minimum CQI is not CQI_1, the RAN node notifies the second multicast group. If the minimum The CQI is still CQI_1, and the RAN node does not need to notify the second multicast group.
  • the RAN node stores the set of UEs corresponding to CQI_1, such as the first set, if the UE exiting the multicast group does not belong to the first set, the RAN node determines that the minimum CQI corresponding to the second multicast group is still is CQI_1; if the UE exiting the multicast group belongs to the first set, the RAN node deletes the UE from the first set, and if the first set is not empty after deleting the UE, then the minimum CQI corresponding to the second multicast group It is still CQI_1; if the first set is empty after deleting the UE in the first set, the RAN node determines the minimum CQI corresponding to the second multicast group according to the CQI corresponding to the UE in the second multicast group, and notifies the second multicast group Two multicast groups.
  • the RAN node may also determine the set of UEs corresponding to the minimum CQI.
  • the RAN node may notify the second multicast
  • UE4 will withdraw from the first multicast group, and the RAN node removes the UE from the first multicast group to obtain a second multicast group, which includes UE1, UE2, UE3, and UE5.
  • the UE set corresponding to the minimum CQI stored by the RAN node includes UE1 and UE4, then the RAN node removes UE4 from the UE set, and the UE set is not empty, then the minimum CQI of the second multicast group is still UE1 The corresponding minimum CQI.
  • the UE set corresponding to the minimum CQI stored by the RAN node only includes UE4, after the RAN node deletes UE4 from the UE set, the set becomes an empty set, and the RAN node according to UE1, UE2, UE3 and The current CQI corresponding to UE5 determines the minimum CQI. For example, if the CQI corresponding to UE1 is 7, the CQI corresponding to UE2 is 5, the CQI corresponding to UE3 is 5, and the CQI corresponding to UE5 is 8, then the RAN node determines the minimum CQI corresponding to the second multicast group.
  • the CQI is 5, and the set of UEs corresponding to the minimum CQI is ⁇ UE2, UE3 ⁇ .
  • the RAN node may notify the second multicast group that the minimum CQI corresponding to the second multicast group is 5.
  • the RAN node also notifies the second multicast group that the set of UEs corresponding to the minimum CQI includes UE2 and UE3.
  • the RAN node When a new UE is added to the first multicast group, the RAN node adds the UE to the first multicast group to obtain a third multicast group.
  • the RAN node receives the indication information indicating the CQI sent by the UE, and determines the CQI corresponding to the UE. If the CQI corresponding to the UE is smaller than the minimum CQI corresponding to the first multicast group (such as the minimum CQI is CQI_1), the RAN node determines the CQI corresponding to the UE.
  • the corresponding CQI is determined as the minimum CQI corresponding to the third multicast group, and notified to the third multicast group.
  • the RAN node determines that the minimum CQI corresponding to the third multicast group is CQI_1, and notifies the UE of the minimum CQI corresponding to the third multicast group.
  • FIG. 6 is a schematic flowchart of a communication method 600 provided by an embodiment of the present application.
  • the terminal device includes a UE, or the terminal device is configured in the UE to implement the method provided in the embodiment shown in FIG. 4.
  • the UE can be replaced by a terminal device.
  • UE1 in the embodiment shown in FIG. 4 can be replaced by terminal device 1
  • UE2 can be replaced by terminal device 2
  • UE3 can be replaced by terminal device 3, and so on.
  • the terminal device may be a chip.
  • the communication method shown in Figure 6 can be applied in a V2X scenario, UE1 is used as the sender of the multicast information of the first multicast group, and the first multicast group includes 5 UEs, such as UE1, UE2, UE3, UE4 and UE5 . It should be noted that FIG. 6 only shows UE1, UE2, and UE3 in the first multicast group, and other UEs may refer to the implementation manners of UE2 or UE3 for specific implementation. For brevity, details are not described here.
  • UE2 sends indication information B to UE1, where the indication information B is used to indicate the corresponding CQI_2 of UE2.
  • UE1 receives indication information B from UE2.
  • UE3 sends indication information F to UE1, where the indication information F is used to indicate the corresponding CQI_3 of UE3.
  • UE1 receives indication information F from UE3.
  • indication information (such as indication information B and indication information F) used to indicate the corresponding CQI of the UE may be carried in the SCI or the PSSCH.
  • UE1 sends indication information G to UEs in the first multicast group, where the indication information G is used to indicate CQI_2, where CQI_2 is the minimum value of CQI corresponding to the first multicast group.
  • the UEs in the first multicast group receive the indication information G from UE1.
  • the indication information G is carried in the SL RRC message, MAC CE or SCI sent by UE1.
  • the indication information G is multicast information.
  • S604 UE1 sends multicast information to the first multicast group, and the MCS of the multicast information is determined according to CQI_2.
  • the RAN node may determine the MCS of the multicast information sent to the first multicast group according to the CQI_2.
  • the multicast information may include, but not limited to, multicast service data and/or SCI (for example, first-level SCI).
  • UE3 measures the reference signal from UE1 to obtain CQI_4.
  • UE3 determines that CQI_4 is greater than CQI_2, and does not send indication information for indicating CQI_4.
  • UE3 may determine that UE3 is not a UE corresponding to the minimum CQI (that is, CQI_2) according to the latest sent CQI or according to the UE set corresponding to the minimum CQI indicated by UE1.
  • UE3 When the measured CQI is greater than CQI_2, UE3 does not send indication information for indicating the CQI; and when the measured CQI is less than or equal to CQI_2, UE3 sends indication information for indicating the CQI.
  • UE2 measures the reference signal from UE1 to obtain CQI_5.
  • UE2 sends indication information H to UE1, where the indication information H is used to indicate CQI_5, where CQI_5 is not equal to CQI_2.
  • UE1 receives indication information H from UE2.
  • UE2 may determine that UE2 is the UE corresponding to the minimum CQI (that is, CQI_2) according to the latest sent CQI or according to the UE set corresponding to the minimum CQI indicated by UE1.
  • CQI_2 the minimum CQI
  • UE3 sends indication information for indicating the CQI; when the measured CQI is equal to CQI_2, does not send indication information for indicating the CQI.
  • the UE receiving the multicast information in the first multicast group may determine whether to send the measured CQI according to the flow shown in FIG. 5 . But the present application is not limited thereto.
  • UE1 After UE1 receives the indication information for indicating CQI from a UE, it may refer to the operation process of the communication device in Embodiment 1 or the RAN node in Embodiment 2, and details are not described here for brevity.
  • the receiving end when the measured channel state parameter in the multicast group is less than the minimum value of the channel state parameter corresponding to the multicast group, the receiving end notifies the sending end of the multicast information, so that the sending end can update The minimum value of the channel state parameter corresponding to the multicast group, and based on the minimum value of the channel state parameter corresponding to the current first multicast group, process the multicast information to be sent, so that all receivers in the multicast group can successfully receive The multicast information. Further, if the receiving end is not the receiving end corresponding to the minimum value of the channel state parameter, when the channel state parameter measured by the receiving end is greater than the minimum value of the channel state parameter, the receiving end does not feed back the channel state parameter.
  • the receiving end is the receiving end corresponding to the minimum value of the channel state parameter, when the channel state parameter measured by the receiving end is equal to the minimum value of the channel state parameter, the receiving end does not feed back the channel state parameter.
  • the transmission resource overhead can be reduced, the resource utilization rate can be improved, and the power consumption of the terminal device can be reduced.
  • each network element may include a hardware structure and/or a software module, and implement the above functions in the form of a hardware structure, a software module, or a hardware structure plus a software module. Whether one of the above-mentioned functions is executed in the form of a hardware structure, a software module, or a hardware structure plus a software module depends on the specific application and design constraints of the technical solution.
  • Fig. 7 is a schematic block diagram of a communication device provided by an embodiment of the present application.
  • the communication device 700 may include a transceiver unit 720 .
  • the communication device 700 may correspond to the terminal device in the foregoing method embodiments, and the communication device 700 may be a terminal device or a device configured on the terminal device, such as a chip.
  • the communication device 700 may correspond to the terminal device in the method according to the above-mentioned embodiments of the present application, and the communication device 700 may include a unit for performing the method performed by the terminal device in the methods in FIGS. 3 to 6 . Moreover, each unit in the communication device 700 and the above-mentioned other operations and/or functions are respectively for implementing the corresponding processes of the methods in FIG. 3 to FIG. 6 .
  • the communication device 700 may further include a processing unit 710, and the processing unit 710 may be configured to process instructions or data to implement corresponding operations.
  • the transceiver unit 720 in the communication device 700 may be an input/output interface or circuit of the chip, and the processing in the communication device 700 Unit 710 may be a processor in a chip.
  • the communication device 700 may further include a storage unit 730, which may be used to store instructions or data, and the processing unit 710 may execute the instructions or data stored in the storage unit, so that the communication device realizes corresponding operations .
  • a storage unit 730 which may be used to store instructions or data
  • the processing unit 710 may execute the instructions or data stored in the storage unit, so that the communication device realizes corresponding operations .
  • the communication device 700 may correspond to the communication device in the foregoing method embodiments.
  • the communication device 700 may be a communication device or a device configured in the communication device, such as a chip.
  • the communication device may be a terminal device or a network device.
  • the communication device 700 may correspond to the communication device in the method according to the above-mentioned embodiments of the present application, and the communication device 700 may include a unit for performing the method performed by the communication device in the methods in FIGS. 3 to 6 . Moreover, each unit in the communication device 700 and the above-mentioned other operations and/or functions are respectively for implementing the corresponding processes of the methods in FIG. 3 to FIG. 6 .
  • the communication device 700 may further include a processing unit 710, and the processing unit 710 may be configured to process instructions or data to implement corresponding operations.
  • the transceiver unit 720 in the communication device 700 may be an input/output interface or circuit of the chip, and the processing in the communication device 700 Unit 710 may be a processor in a chip.
  • the communication device 700 may further include a storage unit 730, which may be used to store instructions or data, and the processing unit 710 may execute the instructions or data stored in the storage unit, so that the communication device realizes corresponding operations .
  • a storage unit 730 which may be used to store instructions or data
  • the processing unit 710 may execute the instructions or data stored in the storage unit, so that the communication device realizes corresponding operations .
  • the transceiver unit 720 in the communication device 700 can be implemented through a communication interface (such as a transceiver or an input/output interface), for example, it can correspond to the transceiver 810 in the terminal device 800 shown in FIG. 8 .
  • the processing unit 710 in the communication apparatus 700 may be implemented by at least one processor, for example, may correspond to the processor 820 in the terminal device 800 shown in FIG. 8 .
  • the processing unit 710 in the communication device 700 may also be implemented by at least one logic circuit.
  • the storage unit 730 in the communication device 700 may correspond to the memory in the terminal device 800 shown in FIG. 8 .
  • the transceiver unit 720 in the communication device 700 can be realized through a communication interface (such as a transceiver or an input/output interface), for example, it can correspond to the network device shown in FIG. 9 Transceiver 910 in 900.
  • the processing unit 710 in the communication device 700 can be implemented by at least one processor, for example, it can correspond to the processor 920 in the network device 900 shown in FIG. circuit implementation.
  • FIG. 8 is a schematic structural diagram of a terminal device 800 provided in an embodiment of the present application.
  • the terminal device 800 may be applied to the system shown in FIG. 1 to perform the functions of a terminal device or a communication device in the foregoing method embodiments.
  • the terminal device 800 includes a processor 820 and a transceiver 810 .
  • the terminal device 800 further includes a memory.
  • the processor 820, the transceiver 810, and the memory may communicate with each other through an internal connection path, and transmit control and/or data signals.
  • the memory is used to store computer programs, and the processor 820 is used to execute the computer programs in the memory to control the transceiver 810 to send and receive signals.
  • the processor 820 and the memory may be combined into a processing device, and the processor 820 is configured to execute the program codes stored in the memory to realize the above functions.
  • the memory may also be integrated in the processor 820, or be independent of the processor 820.
  • the processor 820 may correspond to the processing unit in FIG. 7 .
  • the above-mentioned transceiver 810 may correspond to the transceiver unit in FIG. 7 .
  • the transceiver 810 may include a receiver (or called a receiver, a receiving circuit) and a transmitter (or called a transmitter, a transmitting circuit). Among them, the receiver is used to receive signals, and the transmitter is used to transmit signals.
  • the terminal device 800 shown in FIG. 8 can implement the processes involving the terminal device in the method embodiments shown in FIGS. 3 to 6 .
  • the operations and/or functions of the various modules in the terminal device 800 are respectively for implementing the corresponding processes in the foregoing method embodiments.
  • the above-mentioned processor 820 can be used to execute the actions implemented inside the terminal device described in the foregoing method embodiments, and the transceiver 810 can be used to execute the sending or receiving actions described in the foregoing method embodiments.
  • the transceiver 810 can be used to execute the sending or receiving actions described in the foregoing method embodiments.
  • the terminal device 800 may further include a power supply, configured to provide power to various devices or circuits in the terminal device.
  • the terminal equipment 800 may also include input and output devices, such as including one or more of an input unit, a display unit, an audio circuit, a camera, and a sensor.
  • the circuitry may also include speakers, microphones, and the like.
  • FIG. 9 is a schematic structural diagram of a network device provided by an embodiment of the present application.
  • the network device 900 can be applied to the system shown in FIG. 1 to perform the functions of the communication device in the above method embodiment.
  • the network device 900 includes a processor 920 and a transceiver 910 .
  • the network device 900 further includes a memory.
  • the processor 920, the transceiver 910, and the memory may communicate with each other through an internal connection path, and transmit control and/or data signals.
  • the memory is used to store computer programs, and the processor 920 is used to execute the computer programs in the memory to control the transceiver 910 to send and receive signals.
  • the processor 920 and the memory may be combined into a processing device, and the processor 920 is configured to execute the program codes stored in the memory to realize the above functions.
  • the memory may also be integrated in the processor 820, or be independent of the processor 920.
  • the processor 920 may correspond to the processing unit in FIG. 7 .
  • the above-mentioned transceiver 910 may correspond to the transceiver unit in FIG. 7 .
  • the transceiver 910 may include a receiver (or receiver, receiving circuit) and a transmitter (or transmitter, transmitting circuit). Among them, the receiver is used to receive signals, and the transmitter is used to transmit signals.
  • the network device 900 shown in FIG. 9 can implement various processes involving the communication device in the method embodiments shown in FIGS. 3 to 6 .
  • the operations and/or functions of the various modules in the network device 900 are respectively for implementing the corresponding processes in the foregoing method embodiments.
  • the above-mentioned processor 920 may be used to execute the actions described in the foregoing method embodiments implemented within the communication device, and the transceiver 910 may be used to execute the actions of sending or receiving in the foregoing method embodiments.
  • the transceiver 910 may be used to execute the actions of sending or receiving in the foregoing method embodiments.
  • the embodiment of the present application also provides a processing device, including a processor and a (communication) interface; the processor is configured to execute the method in any one of the above method embodiments.
  • the above processing device may be one or more chips.
  • the processing device may be a field programmable gate array (field programmable gate array, FPGA), an application specific integrated circuit (ASIC), or a system chip (system on chip, SoC). It can be a central processor unit (CPU), a network processor (network processor, NP), a digital signal processing circuit (digital signal processor, DSP), or a microcontroller (micro controller unit) , MCU), can also be a programmable controller (programmable logic device, PLD) or other integrated chips.
  • CPU central processor unit
  • NP network processor
  • DSP digital signal processor
  • microcontroller micro controller unit
  • PLD programmable logic device
  • the present application also provides a computer program product, the computer program product comprising: computer program code, when the computer program code is executed by one or more processors, the The device executes the methods in the embodiments shown in FIG. 3 to FIG. 6 .
  • the technical solutions provided by the embodiments of the present application may be fully or partially implemented by software, hardware, firmware or any combination thereof.
  • software When implemented using software, it may be implemented in whole or in part in the form of a computer program product.
  • the computer program product includes one or more computer instructions.
  • the computer program instructions When the computer program instructions are loaded and executed on the computer, the processes or functions according to the embodiments of the present application will be generated in whole or in part.
  • the computer may be a general computer, a dedicated computer, a computer network, a network device, a terminal device, a core network device, a machine learning device or other programmable devices.
  • the computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website, computer, server or data center Transmission to another website site, computer, server or data center by wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.).
  • the computer-readable storage medium may be any available medium that can be accessed by a computer, or a data storage device such as a server or a data center integrated with one or more available media.
  • the available medium may be a magnetic medium (for example, a floppy disk, a hard disk, or a magnetic tape), an optical medium (for example, a digital video disc (digital video disc, DVD)), or a semiconductor medium.
  • the present application also provides a computer-readable storage medium, the computer-readable storage medium stores program code, and when the program code is run by one or more processors, the processing includes the The apparatus of the controller executes the method in the embodiment shown in FIG. 3 to FIG. 6 .
  • the present application further provides a system, which includes the foregoing multiple terminal devices.
  • the system may further include the aforementioned one or more communication devices.
  • the disclosed systems, devices and methods may be implemented in other ways.
  • the device embodiments described above are only illustrative.
  • the division of the units is only a logical function division. In actual implementation, there may be other division methods.
  • multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

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Abstract

本申请提供了一种信道状态参数的传输方法和通信装置。该方法包括：第一终端装置接收来自通信装置的第一指示信息，该第一指示信息用于指示第一信道状态参数，该第一信道状态参数为第一组播组对应的信道状态参数的最小值，该第一组播组包括接收同一组播信息的多个终端装置，该多个终端装置包括该第一终端装置；该第一终端装置测量来自该通信装置的参考信号，得到第二信道状态参数；若该第二信道状态参数小于该第一信道状态参数，该第一终端装置向该通信装置发送第二指示信息，该第二指示信息用于指示该第二信道状态参数。以期提高组播通信的可靠性。

Description

信道状态参数的传输方法和通信装置
本申请要求于2021年09月14日提交中国国家知识产权局、申请号为202111075615.7、申请名称为“信道状态参数的传输方法和通信装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信领域，具体地，涉及一种信道状态参数的传输方法和通信装置。
背景技术
在移动通信系统中，采用链路自适应的方式提高通信数据的传输效率与可靠性。接收端可以通过测量发送端发送的参考信号确定接收端与发射端之间的信道状态信息，并反馈给发送端，发送端可以基于接收端反馈的信道状态信息，确定待发送通信数据的调制、编码方式等，从而实现链路自适应。
与单播通信的点对点传输不同，组播通信的点对多点传输能够减小组播组内公共信息的资源开销。在组播通信方式中，由一个发送端发送的组播信息需要被多个接收端接收到。目前还缺乏适用于组播通信的信道状态信息反馈方式。
发明内容
本申请提供了一种信道状态参数的传输方法和通信装置，以期提高组播通信的可靠性。
第一方面，提供了一种通信方法，该方法包括：第一终端装置接收来自通信装置的第一指示信息，该第一指示信息用于指示第一信道状态参数，该第一信道状态参数为第一组播组对应的信道状态参数的最小值，该第一组播组包括接收同一组播信息的多个终端装置，该多个终端装置包括该第一终端装置；该第一终端装置测量来自该通信装置的参考信号，得到第二信道状态参数；若该第二信道状态参数小于该第一信道状态参数，该第一终端装置向该通信装置发送第二指示信息，该第二指示信息用于指示该第二信道状态参数。
根据上述方案，组播信息的接收端向发送端反馈小于组播组对应的信道状态参数的最小值的信道状态参数，使得发送端能够及时获取到组播组中的接收端对应的最差信道状态，更新组播组对应的信道状态参数的最小值，以便发送端基于当前组播组对应的信道状态参数的最小值，处理待发送的组播信息，以期组播信息能够克服最差信道状态的信道干扰，使得第一组播组内的终端装置均能够成功接收到该组播信息。能够提高组播通信的可靠性。
结合第一方面，在第一方面的某些实现方式中，第一终端装置接收来自通信装置的该第一指示信息之前，该方法还包括：第一终端装置向通信装置发送第四指示信息，该第四指示信息用于指示第三信道状态参数，该第三信道状态参数为测量得到的该第一终端装置对应的信道状态参数。
可选地，该方法还包括：若该第二信道状态参数大于该第一信道状态参数，该第一终端装置不向该通信装置发送该第二指示信息。
根据上述方案，当第一终端装置测量得到的信道状态参数大于信道状态参数的最小值时，接收端不反馈信道状态参数。能够减小传输资源开销，提高资源利用率，减小终端设 备功耗。
可选地，该方法还包括：若该第二信道状态参数等于该第一信道状态参数，该第一终端装置向该通信装置发送该第二指示信息。
根据上述方案，当第一终端装置测量得到的信道状态参数等于信道状态参数的最小值时，第一终端装置可以向通信装置反馈信道状态参数。以便通信装置能够及时更新信道状态参数的最小值对应的终端装置。
结合第一方面，在第一方面的某些实现方式中，该方法还包括：该第一终端装置接收来自该通信装置的第三指示信息，该第三指示信息用于指示第一集合，该第一集合为该第一信道状态参数对应的终端装置的集合，该第一组播组包括该第一集合，该第一集合不包括该第一终端装置。
根据上述方案，第一终端装置可以通过第三指示信息，获取第一组播组中信道状态参数的最小值对应的终端装置，第一终端装置可以确定自身是否为信道状态参数的最小值对应的终端装置。
结合第一方面，在第一方面的某些实现方式中，该第一终端装置接收来自通信装置的该第一指示信息之前，该方法还包括：第一终端装置向通信装置发送第六指示信息，该第六指示信息用于指示该第一信道状态参数，该第一信道状态参数为测量得到的该第一终端装置对应的信道状态参数。
可选地，该方法还包括：若该第二信道状态参数大于该第一信道状态参数，该第一终端装置向该通信装置发送该第二指示信息。
根据上述方案，当第一终端装置为信道状态参数的最小值对应的终端装置时，第一终端装置在测量得到的信道状态参数大于信道状态参数的最小值时，可以向通信装置反馈测量得到的信道状态参数，以便通信装置能够及时更新第一组播组对应的信道状态参数的最小值，提高链路自适应的效率，提高通信的可靠性。
可选地，该方法还包括：若该第二信道状态参数等于该第一信道状态参数，该第一终端装置不向该通信装置发送该第二指示信息。
根据上述方案，当第一终端装置在测量得到的信道状态参数为发生改变时，第一终端装置可以不向通信装置反馈信道状态参数，能够减小传输资源开销，能够提高资源利用率，减小终端装置的功率消耗。
结合第一方面，在第一方面的某些实现方式中，该方法还包括：该第一终端装置接收来自该通信装置的第五指示信息，该第五指示信息用于指示第二集合，该第二集合为该第一信道状态参数对应的终端装置的集合，该第一组播组包括该第二集合，该第二集合包括该第一终端装置。
根据上述方案，第一终端装置可以通过第五指示信息，获取第一组播组中信道状态参数的最小值对应的终端装置，以便第一终端装置可以确定自身是否为信道状态参数的最小值对应的终端装置。
结合第一方面，在第一方面的某些实现方式中，该信道状态参数包括以下一项或多项：信道质量指示符信道质量指示符(channel quality indicator，CQI)、参考信号强度指示信息(reference signal strength indication，RSSI)或参考信号接收功率(reference signal receiving power，RSRP)。
结合第一方面，在第一方面的某些实现方式中，用于指示信道状态参数的指示信息承 载在上行控制信息(uplink control information，UCI)中、测行控制信息侧行链路控制信息(sidelink control information，SCI)中或物理侧行链路共享信道(physical sidelink shared channel，PSSCH)中。
结合第一方面，在第一方面的某些实现方式中，用于指示该第一组播组对应的信道状态参数的最小值的指示信息承载在以下一种或多种消息中：
无线资源控制(radio resource control，RRC)消息、媒体接入控制(media access control，MAC)控制元素(control element，CE)、下行控制信息(downlink control information，DCI)或SCI。
第二方面，提供了一种通信方法，该方法包括：
通信装置向第一组播组发送第一指示信息，该第一指示信息用于指示第一信道状态参数，该第一信道状态参数为第一组播组对应的信道状态参数的最小值，该第一组播组包括接收同一组播信息的多个终端装置；
该通信装置接收来自第一终端装置的第二指示信息，该第二指示信息用于指示该第二信道状态参数，该第二信道状态参数小于该第一信道状态参数，该多个终端装置包括该第一终端装置。
结合第二方面，在第二方面的某些实现方式中，该方法还包括；
该通信装置向该第一组播组发送组播信息，该组播信息的调制方式和/或编码方式是根据该第一组播组对应的信道状态参数的最小值确定的。
结合第二方面，在第二方面的某些实现方式中，该通信装置向该第一组播组发送该第一指示信息之前，该方法还包括：
该通信装置接收来自该第一组播组的多个指示信息，该多个指示信息中的一个指示信息用于指示该第一组播组中的一个终端装置对应的信道状态参数，该第一信道状态参数为该多个指示信息指示的信道状态参数中的最小值。
结合第二方面，在第二方面的某些实现方式中，该多个指示信息中包括来自该第一终端装置的第四指示信息，该第四指示信息用于指示第三信道状态参数，以及，该方法还包括：该通信装置向该第一终端装置发送第三指示信息，该第三指示信息用于指示第一集合，该第一集合为该第一信道状态参数对应的终端装置的集合，该第一组播组包括该第一集合，该第一集合不包括该第一终端装置。
结合第二方面，在第二方面的某些实现方式中，该多个指示信息中包括来自该第一终端装置的第四指示信息，该第四指示信息用于指示第三信道状态参数，以及，该方法还包括：该通信装置接收来自该第一终端装置的第七指示信息，该第七指示信息用于指示第四信道状态参数，所述第四信道状态参数等于所述第一信道状态参数。
结合第二方面，在第二方面的某些实现方式中，该多个指示信息中包括来自该第一终端装置的第六指示信息，该第六指示信息用于指示第一信道状态参数，以及，该方法还包括：该通信装置向该第一终端装置发送第五指示信息，该第五指示信息用于指示第二集合，该第二集合为该第一信道状态参数对应的终端装置的集合，该第一组播组包括该第二集合，该第二集合包括该第一终端装置。
结合第二方面，在第二方面的某些实现方式中，该多个指示信息中包括来自该第一终端装置的第六指示信息，该第六指示信息用于指示第一信道状态参数，以及，该方法还包括：该通信装置接收来自该第一终端装置的第八指示信息，该第八指示信息用于指示第五 信道状态参数，所述第五信道状态参数大于所述第一信道状态参数。
结合第二方面，在第二方面的某些实现方式中，该方法还包括：
该通信装置根据该第一组播组确定第二组播组，该第一组播组包括该第二组播组，该第二组播组中不包括该第一组播组中的第二终端装置，
若该第二终端装置对应的信道状态参数为该第一组播组对应的信道状态参数的最小值，且该第二组播组中的终端装置不对应该第一组播组的信道状态参数的最小值，该通信装置根据该第二组播组中的终端装置对应的信道状态参数，确定该第二组播组对应的信道状态参数的最小值。
可选地，该通信装置根据该第一组播组确定第二组播组，包括：
该通信装置从该第一组播组中移除该第二终端装置，得到第二组播组；
结合第二方面，在第二方面的某些实现方式中，该信道状态参数包括以下一项或多项：
信道质量指示符CQI、参考信号强度指示信息RSSI或参考信号接收功率RSRP。
结合第二方面，在第二方面的某些实现方式中，用于指示信道状态参数的指示信息承载在上行控制信息UCI中、测行控制信息SCI中或物理测行共享信道PSSCH中。
结合第二方面，在第二方面的某些实现方式中，用于指示该第一组播组对应的信道状态参数的最小值的指示信息承载在以下一种或多种消息中：
下行控制信息DCI、无线资源控制RRC消息、媒体接入控制控制元素MAC CE、测行链路RRC消息或SCI。
第三方面，提供了一种通信装置，该装置包括：收发单元，用于接收来自通信装置的第一指示信息，该第一指示信息用于指示第一信道状态参数，该第一信道状态参数为第一组播组对应的信道状态参数的最小值，该第一组播组包括接收同一组播信息的多个终端装置，该多个终端装置包括第一终端装置；处理单元，用于测量来自该通信装置的参考信号，得到第二信道状态参数；该收发单元还用于在该第二信道状态参数小于该第一信道状态参数的情况下，向该通信装置发送第二指示信息，该第二指示信息用于指示该第二信道状态参数。
结合第三方面，在第三方面的某些实现方式中，该处理单元还用于在该第二信道状态参数大于该第一信道状态参数的情况下，确定不向该通信装置发送该第二指示信息；和/或，该收发单元还用于在该第二信道状态参数等于该第一信道状态参数的情况下，向该通信装置发送该第二指示信息
结合第三方面，在第三方面的某些实现方式中，该收发单元还用于接收来自该通信装置的第三指示信息，该第三指示信息用于指示第一集合，该第一集合为该第一信道状态参数对应的终端装置的集合，该第一组播组包括该第一集合，该第一集合不包括该第一终端装置。
结合第三方面，在第三方面的某些实现方式中，该收发单元接收来自通信装置的该第一指示信息之前，该收发单元还用于向通信装置发送第四指示信息，该第四指示信息用于指示第三信道状态参数，该第三信道状态参数为测量得到的该第一终端装置对应的信道状态参数。
结合第三方面，在第三方面的某些实现方式中，该收发单元还用于在该第二信道状态参数大于该第一信道状态参数的情况下，向该通信装置发送该第二指示信息；和/或，该处理单元还用于在该第二信道状态参数等于该第一信道状态参数的情况下，不向该通信装 置发送该第二指示信息。
结合第三方面，在第三方面的某些实现方式中，该收发单元还用于接收来自该通信装置的第五指示信息，该第五指示信息用于指示第二集合，该第二集合为该第一信道状态参数对应的终端装置的集合，该第一组播组包括该第二集合，该第二集合包括该第一终端装置。
结合第三方面，在第三方面的某些实现方式中，该收发单元接收来自通信装置的该第一指示信息之前，该收发单元还用于向通信装置发送第六指示信息，该第六指示信息用于指示该第一信道状态参数，该第一信道状态参数为测量得到的该第一终端装置对应的信道状态参数。
结合第三方面，在第三方面的某些实现方式中，该信道状态参数包括以下一项或多项：
信道质量指示符CQI、参考信号强度指示符RSSI或参考信号接收功率RSRP。
结合第三方面，在第三方面的某些实现方式中，用于指示信道状态参数的指示信息承载在上行控制信息UCI中、测行控制信息SCI中或物理测行共享信道PSSCH中。
结合第三方面，在第三方面的某些实现方式中，用于指示该第一组播组对应的信道状态参数的最小值的指示信息承载在以下一种或多种消息中：
下行控制信息DCI、无线资源控制RRC消息、媒体接入控制控制元素MAC CE、测行链路RRC消息或SCI。
第四方面，提供了一种通信装置，该装置包括：处理单元，用于确定第一信道状态参数，该第一信道状态参数为第一组播组对应的信道状态参数的最小值，该第一组播组包括接收同一组播信息的多个终端装置；收发单元，用于向第一组播组发送第一指示信息，该第一指示信息用于指示第一信道状态参数；该收发单元还接收来自第一终端装置的第二指示信息，该第二指示信息用于指示该第二信道状态参数，该第二信道状态参数小于该第一信道状态参数，该多个终端装置包括该第一终端装置。
结合第四方面，在第四方面的某些实现方式中，该收发单元还用于向该第一组播组发送组播信息，该组播信息的调制方式和/或编码方式是根据该第一组播组对应的信道状态参数的最小值确定的。
结合第四方面，在第四方面的某些实现方式中，该收发单元向该第一组播组发送该第一指示信息之前，该收发单元还用于接收来自该第一组播组的多个指示信息，该多个指示信息中的一个指示信息用于指示该第一组播组中的一个终端装置对应的信道状态参数，该第一信道状态参数为该多个指示信息指示的信道状态参数中的最小值。
结合第四方面，在第四方面的某些实现方式中，该多个指示信息中包括来自该第一终端装置的第四指示信息，该第四指示信息用于指示第三信道状态参数，以及，该收发单元还用于向该第一终端装置发送第三指示信息，该第三指示信息用于指示第一集合，该第一集合为该第一信道状态参数对应的终端装置的集合，该第一组播组包括该第一集合，该第一集合不包括该第一终端装置。
结合第四方面，在第四方面的某些实现方式中，该多个指示信息中包括来自该第一终端装置的第四指示信息，该第四指示信息用于指示第三信道状态参数，以及，该收发单元还用于接收来自该第一终端装置的第七指示信息，该第七指示信息用于指示第四信道状态参数，所述第四信道状态参数等于所述第一信道状态参数。
结合第四方面，在第四方面的某些实现方式中，该多个指示信息中包括来自该第一终 端装置的第六指示信息，该第六指示信息用于指示第一信道状态参数，以及，该收发单元还用于向该第一终端装置发送第五指示信息，该第五指示信息用于指示第二集合，该第二集合为该第一信道状态参数对应的终端装置的集合，该第一组播组包括该第二集合，该第二集合包括该第一终端装置。
结合第四方面，在第四方面的某些实现方式中，该多个指示信息中包括来自该第一终端装置的第四指示信息，该第四指示信息用于指示第一信道状态参数，以及，该收发单元还用于接收来自该第一终端装置的第八指示信息，该第八指示信息用于指示第五信道状态参数，所述第五信道状态参数等于所述第一信道状态参数。结合第四方面，在第四方面的某些实现方式中，该处理单元还用于：根据该第一组播组确定第二组播组，该第一组播组包括该第二组播组，该第二组播组中不包括该第一组播组中的第二终端装置；在该第二终端装置对应的信道状态参数为该第一组播组对应的信道状态参数的最小值，且该第二组播组中的终端装置不对应该第一组播组的信道状态参数的最小值的情况下，根据该第二组播组中的终端装置对应的信道状态参数，确定该第二组播组对应的信道状态参数的最小值。
结合第四方面，在第四方面的某些实现方式中，该处理单元具体用于从该第一组播组中移除该第二终端装置，得到第二组播组；
结合第四方面，在第四方面的某些实现方式中，该信道状态参数包括以下一项或多项：
信道质量指示符CQI、参考信号强度指示信息RSSI或参考信号接收功率RSRP。
结合第四方面，在第四方面的某些实现方式中，用于指示信道状态参数的指示信息承载在上行控制信息UCI中、测行控制信息SCI中或物理测行共享信道PSSCH中。
结合第四方面，在第四方面的某些实现方式中，用于指示该第一组播组对应的信道状态参数的最小值的指示信息承载在以下一种或多种消息中：
下行控制信息DCI、无线资源控制RRC消息、媒体接入控制控制元素MAC CE、测行链路RRC消息或SCI。
第五方面，提供了一种终端装置，包括处理器。该处理器可以实现上述第一方面以及第一方面中任一种可能实现方式中的方法。可选地，该通信装置还包括存储器，该处理器与该存储器耦合，可用于执行存储器中的指令，以实现上述第一方面以及第一方面中任一种可能实现方式中的方法。可选地，该通信装置还包括通信接口，处理器与通信接口耦合。本申请实施例中，通信接口可以是收发器、管脚、电路、总线、模块或其它类型的通信接口，不予限制。
在一种实现方式中，该终端装置为终端设备。当该终端装置为终端设备时，该通信接口可以是收发器，或，输入/输出接口。
在另一种实现方式中，该终端装置为配置于终端设备中的芯片。当该终端装置为配置于终端设备中的芯片时，该通信接口可以是输入/输出接口，该处理器可以是逻辑电路。
可选地，该收发器可以为收发电路。可选地，该输入/输出接口可以为输入/输出电路。
第六方面，提供了一种通信装置，包括处理器。该处理器可以实现上述第二方面以及第二方面中任一种可能实现方式中的方法。可选地，该通信装置还包括存储器，该处理器与该存储器耦合，可用于执行存储器中的指令，以实现上述第二方面以及第二方面中任一种可能实现方式中的方法。可选地，该通信装置还包括通信接口，处理器与通信接口耦合。本申请实施例中，通信接口可以是收发器、管脚、电路、总线、模块或其它类型的通信接口，不予限制。
在一种实现方式中，该通信装置为终端设备或网络设备。当该通信装置为终端设备或网络设备时，该通信接口可以是收发器，或，输入/输出接口。
在另一种实现方式中，该通信装置为配置于终端设备或网络设备中的芯片。当该通信装置为配置于终端设备或网络设备中的芯片时，该通信接口可以是输入/输出接口，该处理器可以是逻辑电路。
可选地，该收发器可以为收发电路。可选地，该输入/输出接口可以为输入/输出电路。
第七方面，提供了一种处理器，包括：输入电路、输出电路和处理电路。该处理电路用于通过该输入电路接收信号，并通过该输出电路发射信号，使得该处理器执行第一方面或第二方面以及第一方面或第二方面中任一种可能实现方式中的方法。
在具体实现过程中，上述处理器可以为一个或多个芯片，输入电路可以为输入管脚，输出电路可以为输出管脚，处理电路可以为晶体管、门电路、触发器和各种逻辑电路等。输入电路所接收的输入的信号可以是由例如但不限于接收器接收并输入的，输出电路所输出的信号可以是例如但不限于输出给发射器并由发射器发射的，且输入电路和输出电路可以是同一电路，该电路在不同的时刻分别用作输入电路和输出电路。本申请实施例对处理器及各种电路的具体实现方式不做限定。
第八方面，提供了一种计算机程序产品，该计算机程序产品包括：计算机程序(也可以称为代码，或指令)，当该计算机程序被运行时，使得计算机执行上述第一方面或第二方面以及第一方面或第二方面中任一种可能实现方式中的方法。
第九方面，提供了一种计算机可读存储介质，该计算机可读存储介质存储有计算机程序(也可以称为代码，或指令)当其在计算机上运行时，使得计算机执行上述第一方面或第二方面以及第一方面或第二方面中任一种可能实现方式中的方法。
第十方面，提供了一种通信系统，包括前述的多个终端装置和前述的至少一个通信装置。
附图说明
图1是适用于本申请实施例的通信系统的一个示意性架构；
图2是适用于本申请实施例的通信系统的示意图；
图3是本申请实施例一提供的信道状态参数的传输方法的示意性流程图；
图4是本申请实施例二提供的信道状态参数的传输方法的示意性流程图；
图5是本申请实施例提供的UE确定是否反馈信道状态参数的示意性流程图；
图6是本申请实施例三提供的信道状态参数的传输方法的示意性流程图；
图7是本申请实施例提供的通信装置的示意性框图；
图8是本申请实施例提供的终端设备的示意性结构图；
图9是本申请实施例提供的网络设备的示意性结构图。
具体实施方式
下面将结合附图，对本申请中的技术方案进行描述。
为使本申请实施例的目的、技术方案和优点更加清楚，下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员 在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
本申请实施例的说明书、权利要求书及上述附图中的术语“第一”、“第二”等是用于区别类似的对象，而不必用于描述特定的顺序或先后次序。应该理解这样使用的数据在适当情况下可以互换，以便这里描述的本申请的实施例能够以除了在这里图示或描述的那些以外的顺序实施。此外，术语“包括”和“具有”以及他们的任何变形，意图在于覆盖不排他的包含，例如，包含了一系列步骤或单元的过程、方法、系统、产品或设备不必限于清楚地列出的那些步骤或单元，而是可包括没有清楚地列出的或对于这些过程、方法、产品或设备固有的其它步骤或单元。
本申请实施例的技术方案可以应用于各种通信系统，例如：长期演进(long term evolution，LTE)系统、LTE频分双工(frequency division duplex，FDD)系统、LTE时分双工(time division duplex，TDD)、通用移动通信系统(universal mobile telecommunications system，UMTS)、全球微波接入互操作性(worldwide interoperability for microwave access，WiMAX)通信系统、第五代(5th generation，5G)系统或新无线(new radio，NR)车到其它设备(vehicle-to-X V2X)，其中V2X可以包括车到互联网(vehicle to network，V2N)、车到车(vehicle to-vehicle，V2V)、车到基础设施(vehicle to infrastructure，V2I)、车到行人(vehicle to pedestrian，V2P)等、车间通信长期演进技术(LTE-vehicle，LTE-V)、车联网、机器类通信(machine type communication，MTC)、物联网(Internet of things，IoT)、机器间通信长期演进技术(LTE-machine，LTE-M)，机器到机器(machine to machine，M2M)，非地面通信(non-terrestrial network，NTN)系统，NTN系统也可以称为卫星通信系统，或者未来演进的其它通信系统等。本申请对此不作限定。
图1是适用于本申请实施例的系统架构的示意图。如图1所示，该系统架构可以包括下列网元：
1、终端设备，也可以称为用户设备(user equipment，UE)，如图1中的UE1、UE2、UE3和UE4。如图1所示的UE可以执行本申请实施例提供的方法。但本申请不限于此，本申请实施例提供的信道状态参数的传输方法可以是由终端装置执行，该终端装置可以是UE本身，或者终端装置可以配置于UE。例如，该终端装置具有处理功能，以及可以控制UE执行接收和发送通信信息的操作的装置。作为示例非限定，该终端装置可以是芯片。
2、无线接入网(radio access network,RAN)节点：基于无线通信技术实现接入网络功能的模块、装置或设备等可以称为RAN节点，RAN节点主要用于提供UE无线接入移动网络的接口，能够管理无线资源，为UE提供接入服务，进而完成控制信号和用户数据在UE和核心网之间的转发，例如RAN节点可以是基站等。如4G系统中的eNB、5G系统中采用的无线接入网为下一代无线接入网(next generation radio access network，NG-RAN)，即gNB等。
UE可以与RAN节点建立通信链接，通过蜂窝通信接口即用户设备-通用移动通信系统陆地接入网络(UE-UTRAN，Uu)接口进行通信，如图1所示的UE1和UE4。例如图2所示UE1与UE4可以是RAN节点覆盖范围内的终端设备。UE与UE之间也可以进行直连通信，通过直连通信接口，即基于近场的业务通信(接口)5(proximity-based service communication(interface)5，PC5)进行通信。如图1所示的UE1与UE4、UE2、UE2与UE3之间可以通过PC5接口进行通信。例如图2所示，进行PC5接口通信的UE可以在RAN覆盖范围内，如UE1与UE4，也可以在RAN覆盖范围外，如UE2与UE3。也可 以是通过PC5接口通信的两个UE，其中一个UE在RAN覆盖范围内，另一个UE在RAN覆盖范围外，如UE1与UE2。
在本申请实施例中，Uu接口可以为UE与接入网设备之间的接口。其中，该接入网设备可以为UMTS中的基站，4G网络中的演进型基站(evolutional node B，eNodeB或eNB)，5G网络中的下一代基站(next generation node base station，gNodeB或gNB)，或后续演进网络中的基站，不予限制。当两个或多个UE之间通过接入网节点进行通信时，该通信可以简称为Uu通信或Uu接口通信。
在本申请实施例中，PC5接口可以为两个UE之间的接口，可以用于完成控制面和用户面的信令和数据传输、临近服务发现、直接通信等。PC5接口可以用于UE之间的近距离直接通信或直连通信，可以简称为PC5通信、PC5接口通信或侧行链路通信。
3、接入和移动性管理功能(access and mobility management function,AMF)：主要用于移动性管理和接入管理等。
4、会话管理功能(session management function,SMF)：主要用于会话管理、UE的网络互连协议(internet protocol,IP)地址分配和管理、选择可管理用户平面功能、策略控制、或收费功能接口的终结点以及下行数据通知、为用户面功能配置路由信息等。
5、策略控制功能(policy control function,PCF)：用于指导网络行为的统一策略框架，为控制平面功能网元(例如AMF，SMF网元等)提供策略规则信息等。
6、统一数据管理(unified data management,UDM)：用于处理用户标识、接入鉴权、注册、或移动性管理等。
7、用户面功能(user plane function,UPF)：用于分组路由和转发、或用户面数据的服务质量(quality of service,QoS)处理等。
8、应用功能(application function,AF)：主要支持与第三代合作伙伴计划(3rd generation partnership project,3GPP)核心网交互来提供服务，例如，影响数据路由决策、策略控制功能、或者向网络侧提供第三方的一些服务。
9、网络能力开放功能(network exposure function,NEF)，连接核心网网元与外部应用服务器，对外部应用服务器向核心网发起业务请求时提供认证与数据转发等服务。
10、数据网络(data network,DN)：用于提供传输数据的网络，例如，Internet网络等。
11、统一数据存储库(unified data repository,UDR)：用于为PCF策略提供存储和检索，开放的结构化数据的存储和检索和应用功能请求的用户信息存储等。
本申请实施例中的终端设备也可以称为UE、接入终端、用户单元、用户站、移动站、移动台、远方站、远程终端、移动设备、用户终端、终端、无线通信设备、用户代理或用户装置。本申请的实施例中的终端设备可以是手机、平板电脑、带无线收发功能的电脑、虚拟现实(virtual reality，VR)终端设备、增强现实(augmented reality，AR)终端设备、工业控制中的无线终端、无人驾驶中的无线终端、远程医疗中的无线终端、智能电网中的无线终端、运输安全中的无线终端、智慧城市中的无线终端、智慧家庭中的无线终端、蜂窝电话、无绳电话、会话启动协议(session initiation protocol，SIP)电话、无线本地环路(wireless local loop，WLL)站、个人数字助理(personal digital assistant，PDA)、具有无线通信功能的手持设备、计算设备、车载设备、可穿戴设备，5G网络中的终端设备或者未来演进的公用陆地移动通信网络(public land mobile network，PLMN)中的终端设备 等。应理解，本申请对于终端设备的具体形式不作限定。
本申请实施例中的RAN节点可以是接入网中具有无线收发功能的设备。RAN节点也可以称为网络设备或RAN设备，该RAN节点包括但不限于：基站、演进型节点B(evolved node B，eNB)、无线网络控制器(radio network controller，RNC)、节点B(node B，NB)、基站控制器(base station controller，BSC)、基站收发台(base transceiver station，BTS)、家庭基站(例如，home evolved nodeB，或home node B，HNB)、基带单元(baseband unit，BBU)，无线保真(wireless fidelity，WIFI)系统中的接入点(access point，AP)、无线中继节点、无线回传节点、传输点(transmission point，TP)或者发送接收点(transmission and reception point，TRP)等。
该设备还可以为构成gNB或传输点的网络节点，如基带单元(BBU)，或，分布式单元(distributed unit，DU)等。应理解，本申请对于网络设备的具体形式不作限定。
下面对本申请实施例涉及的相关技术及术语进行说明。
一、V2X通信
V2X支持PC5接口通信和Uu接口通信两种通信模式。其中，PC5接口支持侧行链路SL通信，NR V2X SL通信的物理信道包括携带控制信息的物理层侧行链路控制信道(physical sidelink control channel，PSCCH)、携带数据负载和额外控制信息的PSSCH、携带同步信息的物理层侧行链路广播信道(physical sidelink broadcast channel，PSBCH)和携带反馈信息的物理层侧行链路反馈信道(physical sidelink feedback channel，PSFCH)。
在V2X SL中，数据以传输块(transport block，TB)的形式在PSSCH上承载并与SCI相关联。SCI指示了在PSSCH上用于承载TB的资源和解码TB所需的信息。PSCCH随PSSCH一同发送。SCI的传输分为两级，第一级SCI在PSCCH上承载，而第二级SCI在PSSCH上承载。对于不是接收目标的UE来说，只需要对第一级SCI进行译码来实现感知的目的。第二级SCI则包含了针对接收UE的额外的控制信息。第二级SCI的引入增加了SCI设计的灵活性，从而进一步支持单播、组播和广播传输。第一级SCI包括对所传输TB频域资源、时域资源的指示、对应PSSCH优先级的指示、第二级SCI的格式与大小以及PSSCH所传输数据对应的调制和编码方式(modulation and coding scheme，MCS)。MCS具体通过MCS表中对应的MCS索引指示。在V2X SL中，默认的MCS表和额外的两个MCS表可以在每个资源池中配置或预配置。为了支持不同的信道条件，PSSCH的解调参考信号(demodulation reference signal，DMRS)可以承载在PSSCH时隙内不同符号上。在资源池内，DMRS的时间图样可以由第一级SCI指示。
二、V2X SL中的链路自适应
V2X SL采用链路自适应来提升单播传输的效率与可靠性。在V2X单播系统中，链路自适应可以根据接收UE向发送UE反馈的信道状态信息来调节，信道状态信息可以包括CQI和秩指示符(rank indicator，RI)等。
链路自适应技术可以根据射频链路质量来调整适合发送的MCS。数据接收UE通过对发送UE在PSSCH上发送的信道状态信息参考信号(channel state information-reference signal，CSI-RS)进行测量来确定CQI。CQI可以根据测量CSI-RS的测量结果和相应的CQI表确定。CQI可以指示适用于该当前信道的最高调制和编码方案，发送端UE可以参考CQI选择待传输数据的MCS。
V2X SL中单播传输还可以通过秩自适应实现调整多天线传输中发送PSSCH的流数， 以提高频谱效率。接收UE根据从发送UE的一个或多个天线端口发送的SL CSI-RS的信道测量信息，可以确定与测量的SL信道的秩对应的RI。信道的秩决定了信道可以支持的流数。目前V2X SL中PSSCH传输最多支持两个流，RI可以等于1或2。但本申请不限于此，本申请实施例也可以应用于PSSCH的多个流传输。RI还可以由CQI确定。CQI和RI的组合表示可以从接收UE反馈给发送UE的CSI，用于单播PSSCH传输的链路和秩自适应。目前V2X SL不支持预编码矩阵指示(precoding matrix indicator，PMI)反馈，发送UE可以根据接收UE反馈的CQI和RI进行开环多天线SL传输。但本申请不限于此，本申请实施例也可以应用于接收UE反馈PMI的场景。
三、单播通信和组播通信
单播通信是指一个发送端与一个接收端之间的点对点的通信方式，发送端发送的信号可以包括发送端的标识(即源设备标识)以及目标接收端的标识，由该目标接收端接收该信号，从而实现点对点的通信。如单播通信可以包括网络设备与终端设备之间的点对点通信，或V2X SL中的终端设备与终端设备之间的点对点通信。但本申请不限于此。
组播通信是指一个发送端与多个接收端之间的点对多点的通信方式，发送端发送的信号可以包括发送端的标识(即源设备标识)以及目标组的标识，由属于该目标组的多个接收端接收该信号，从而实现点到多点的通信。
例如，组播通信可以包括网络设备的组播通信，即网络设备向多个终端设备发送组播信号的点对多点通信，网络设备可以为该多个终端设备分配组标识用于接收组播信号。例如，图2所示的UE1和UE4可以是属于同一组播组，网络设备可以发送带有该终端设备组标识的组播信号，由UE1和UE4基于组标识接收该组播信号。
再例如，组播通信可以包括V2X SL的组播通信，即一个终端设备向多个终端设备发送组播信号的点对多点通信。该发送终端设备与该多个接收终端设备可以属于同一组播组，接收终端设备可以基于组播组的标识接收该组播组内的组播信号。但本申请不限于此。例如，图2所示的UE1、UE2、UE3、UE5可以属于同一组播组，UE2发送带有该组标识的组播信号，UE1、UE3、UE5可以基于组标识接收该组播信号。
组播组的划分可以是基于终端设备位置或终端设备之间的距离进行分组。例如，在同一地理位置范围内的终端设备分为同一组播组。或者终端设备之间的距离小于预设门限值的终端设备分为同一组播组。再或者，可以由组播信号的发送端设备(如网络设备或终端设备)基于接收到的终端设备的信号强度进行组播组的划分，例如，接收信号强度在预设范围内的终端设备分为同一组播组。但本申请不限于此。
目前，主要考虑了单播通信的信道状态信息的反馈方式，而对于组播通信，若简单地沿用单播通信的信道状态信息的反馈方式，当组播通信的接收端数量较大时，信道状态信息的资源开销较大，将影响系统通信数据的吞吐量。由于发送端发送的组播信号的抗干扰能力(如调制方式、编码方式)主要由多个接收端的信道状态中的最差信道状态决定，以使信道状态最差的接收端能够接收到组播信号，因此，本申请实施例提出组播组中的接收端在测量得到的信道状态参数小于组播组对应的信道状态参数的最小值的情况下，向发送端反馈该测量得到的信道状态参数，使得发送端能够更新组播组对应的信道状态参数的最小值，并基于当前第一组播组对应的信道状态参数的最小值，处理待发送的组播信息，以便第一组播组内的终端装置能够成功接收到该组播信息。
下面结合附图对本申请实施例提供的通信方法进行说明。
实施例一
图3是本申请实施例提供的通信方法300的一个示意性流程图。如图3所示的通信方法可以由第一终端装置执行，该第一终端装置属于第一组播组。如图3所示的实施例中通信装置为向该第一组播组发送组播信息的发送装置，该第一组播组包括接收同一组播信息的N个终端装置，也就是说，在点对多点的组播通信方式中，通信装置作为组播信息的发送装置，该N个终端装置作为该组播信息的接收装置，通信装置发送的一个组播信息，该第一组播组内的该N个终端装置均需要接收该组播信息。其中，N为正整数，该N个终端装置包括第一终端装置。
需要说明的是，本申请实施例提供的终端装置可以配置于终端设备或终端装置可以是终端设备本身。通信装置可以是接入网装置，或者可以是终端装置。本申请对此不作限定。其中，接入网装置可以配置于RAN节点，或者接入网装置可以是RAN节点本身。
S301，第一终端装置接收来自通信装置的第一指示信息，该第一指示信息用于指示第一信道状态参数，该第一信道状态参数为第一组播组对应的信道状态参数的最小值。
通信装置可以基于第一组播组的终端装置对应的信道状态参数，确定第一组播组对应的信道状态参数的最小值，即第一组播组中终端装置对应的信道状态参数的最小值。
可选地，通信装置接收来自第一组播组的N个指示信息，该N个指示信息中的一个指示信息用于指示第一组播组的一个终端装置对应的信道状态参数。
其中，该N个指示信息可以是该N个终端装置在相同或不同时刻发送给通信装置的，本申请对此不作限定。
通信装置可以根据该N个指示信息，确定该第一组播组中的N个终端装置对应的信道状态参数，并确定该N个终端装置对应的信道状态参数中的最小值为第一信道状态参数，因此，第一组播组对应的信道状态参数的最小值为第一信道状态参数。
作为示例非限定，信道状态参数包括但不限于CQI、RSSI或RSRP中的一项，或者信道状态参数包括其中的两项或全部。
需要说明的，终端装置对应的信道状态参数是指用于表征终端装置与通信装置之间的信道状态的参数。终端装置可以测量来自通信装置的参考信号获取信道信息，基于信道信息确定终端装置对应的信道状态参数，该信道状态参数可以表征终端装置与通信装置之间的信道状态，信道状态参数越大表征信道状态越好；信道状态参数越小表征信道状态越差。
可选地，该N个指示信息可以是该N个终端装置向该通信设备发送的CSI，每个CSI中包括终端装置对应的信道状态参数。
可选地，用于指示信道状态参数的指示信息可以承载在终端装置发送的UCI、SCI或PSSCH中。
该通信装置向该第一组播组发送该第一指示信息。通过该第一指示信息通知第一组播组对应的信道状态参数的最小值，即第一信道状态参数。
该通信装置可以根据第一组播组对应的信道状态参数的最小值，确定发送给第一组播组的组播信息的调制方式和/或编码方式等。以便第一组播组内的终端装置能够成功接收到该组播信息。
作为示例非限定，组播信息可以包括组播的控制信息和/或组播业务数据等。
该第一组播组中的终端装置接收来自该通信装置的第一指示信息，根据第一指示信息确定第一组播组对应的信道状态参数的最小值为第一信道状态参数。终端装置可以基于该 第一组播组对应的信道状态参数的最小值，确定是否发送测量后得到的信道状态参数。
可选地，该第一指示信息可以是以下一项或多项：
RRC消息、MAC CE、DCI或SCI。
作为示例非限定，该第一指示信息可以是组播信息。
S302，该第一终端装置测量来自通信装置的参考信号，得到第二信道状态参数。
第一终端装置可以周期性地或半静态地测量来自通信装置的参考信号，得到信道状态参数。或者第一终端装置可以是被通信装置触发(例如通过发送给第一终端装置的指示信息触发第一终端装置)，测量一次通信装置的参考信号。但本申请不限于此。
作为示例非限定，上述通信装置的参考信号可以包括但不限于以下一项或多项：
CSI-RS、同步信号(synchronization signals，SS)和物理广播信道(physical broadcast channel，PBCH)块SSB、或解调参考信号(demodulation reference signal，DMRS)。
例如，终端装置可以测量来自通信装置的参考信号获取信道信息，基于信道信息确定终端装置对应的信道状态参数，该信道状态参数可以表征终端装置与通信装置之间的信道状态。示例性地，信道状态参数为CQI，终端装置测量参考信号得到的信道信息，例如，信道路径损耗、时延扩展等用于表征信道特征的信息，终端装置根据信道信息，确定适用于该信道的CQI，该CQI用于指示适用于该信道的调制阶数、信道编码码率或编码效率中的一项或多项。
S303，若该第二信道状态参数小于该第一信道状态参数，该第一终端装置向该通信装置发送第二指示信息，该第二指示信息用于指示第二信道状态参数。
相应地，该通信装置接收来自第一终端装置的该第二指示信息。该通信装置可以根据该第二指示信息确定该第一终端装置对应的信道状态参数变更为第二信道状态参数。以及，通信装置可以根据当前第一组播组中的终端装置对应的信道状态参数，确定第一组播组对应的信道状态参数的最小值。若仅第一终端装置对应的信道状态参数变更为第二信道状态参数，该通信装置可以确定第一组播组对应的信道状态参数的最小值变更为该第二信道状态参数，并通知第一组播组中的终端装置。
根据上述方案，组播信息的接收端向发送端反馈小于组播组对应的信道状态参数的最小值的信道状态参数，使得发送端能够及时获取到组播组中的接收端对应的最差信道状态，更新组播组对应的信道状态参数的最小值，以便发送端基于组播组对应的信道状态参数的最小值，处理待发送的组播信息，以期组播信息能够克服最差信道状态的信道干扰，使得第一组播组内的终端装置均能够成功接收到该组播信息。能够提高组播通信的可靠性。
可选地，第二信道状态参数大于或等于第一信道状态参数，第一终端装置可以基于第一终端装置是或不是第一信道状态参数对应的终端装置两种情况，确定是否发送第二指示信息。
情况一，第一终端装置不是第一信道状态参数对应的终端装置。
可选地，若第二信道状态参数大于第一信道状态参数，第一终端装置不向通信装置发送第二指示信息。
第一终端装置若不是第一信道状态参数对应的终端装置，在第一终端装置测量得到的信道状态参数大于第一信道状态参数的情况下，可以认为第一组播组对应的信道状态参数的最小值不发生改变，不会影响通信装置确定待发送的组播信息的处理方式，因此，本申请实施例提出第一终端装置不向通信装置发送第二指示信息，通知第二信道状态参数。能 够减小传输资源开销，提高资源利用率，减小终端装置的功率消耗。
可选地，若第二信道状态参数等于第一信道状态参数，第一终端装置向通信装置发送第二指示信息。
第一终端装置若不是第一信道状态参数对应的终端装置，第一终端装置可以在测量得到的信道状态参数等于第一组播组对应的信道状态参数的最小值时，通过第二指示信息通知通信装置，以便通信装置确定信道状态参数的最小值对应的终端装置。
第一终端装置可以根据但不限于以下实施方式确定第一终端装置不是第一信道状态参数对应的终端装置。
一种实施方式中，第一终端装置可以根据第一终端装置向通信装置最近一次发送的信道状态参数，确定第一终端装置不是第一信道状态参数对应的终端装置。
示例性地，第一终端装置接收到第一指示信息之前，第一终端装置向通信装置发送第四指示信息，该第四指示信息用于指示第三信道状态，该第三信道状态为测量得到的第一终端装对应的信道状态参数。
例如，上述N个指示信息中包括该第四指示信息。第一终端装置接收到该第一指示信息后，可以确定最近一次发送的第三信道状态参数与第一信道状态参数不相等，则第一终端装置确定其不是第一信道状态参数对应的终端装置。
另一种实施方式中，第一终端装置可以根据通信装置指示的信道状态参数的最小值对应的终端装置的集合，确定第一终端装置不是第一信道状态参数对应的终端装置。
示例性地，通信装置向第一组播组发送第三指示信息，该第三指示信息用于指示第一集合，该第一集合为第一信道状态参数对应的终端装置的集合，第一组播组包括该第一集合，该第一集合不包括第一终端装置。
相应地，第一终端装置接收该第三指示信息，根据第一集合，确定第一终端装置不是第一信道状态参数对应的终端装置。
可选地，该第三指示信息包括第一信道状态参数对应的终端装置的标识信息。
第一组播组中的终端装置可以根据第三指示信息指示的终端装置的标识信息，确定第一集合。
通信装置向第一组播组发送的第一指示信息和第三指示信息可以承载在同一组播消息中发送给第一组播组，也可以承载在不同的消息中发送给第一组播组。本申请对此不作限定。
情况二，第二终端装置是第一信道状态参数对应的终端装置。
可选地，若第二信道状态参数大于第一信道状态参数，第一终端装置向通信装置发送第二指示信息。
第一终端装置是第一信道状态参数对应的终端装置，在第一终端装置测量得到的信道状态参数大于第一信道状态参数的情况下，可以认为信道状态参数的最小值可能发生改变。第一终端装置需要向通信装置发送第二指示信息，以便通信装置判断信道状态参数的最小值是否发生改变，从而更新信道状态参数的最小值。
例如，第二信道状态参数大于第一信道状态参数，第一终端装置向通信装置发送第二指示信息。通信装置接收到第二指示信息后，确定第一终端装置对应的信道状态参数更新为第二信道状态参数，通信装置根据当前第一组播组对应的信道状态参数，确定信道状态参数的最小值。若第一组播组中还包括至少一个终端装置对应第一信道状态参数，且该第 一信道状态参数为最小值，第一组播组对应的信道状态参数的最小值仍为第一信道状态参数。若第一组播组中不包括与第一信道状态参数对应的终端装置，通信装置可以确定当前第一组播组对应的信道状态参数的最小值，并通知第一组播组。
可选地，若第二信道状态参数等于第一信道状态参数，第一终端装置不向通信装置发送第二指示信息。
也就是说，在第一终端装置对应的信道状态参数不发生改变的情况下，第一终端装置不向通信装置发送第二指示信息，能够减小传输资源开销，提高资源的利用率，减小终端装置的功率消耗。
第一终端装置可以根据但不限于以下实施方式确定第一终端装置是第一信道状态参数对应的终端装置。
一种实施方式中，第一终端装置可以根据第一终端装置向通信装置最近一次发送的信道状态参数，确定第一终端装置是第一信道状态参数对应的终端装置。
示例性地，第一终端装置接收到第一指示信息之前，第一终端装置向通信装置发送第六指示信息，该第六指示信息用于指示第一信道状态，该第一信道状态为测量得到的第一终端装置对应的信道状态参数。
例如，上述N个指示信息中包括该第六指示信息。第一终端装置接收到该第一指示信息后，可以确定最近一次发送的是第一信道状态参数，则第一终端装置确定第一终端装置是第一信道状态参数对应的终端装置。
另一种实施方式中，第一终端装置可以根据通信装置指示的信道状态参数的最小值对应的终端装置的集合，确定第一终端装置是第一信道状态参数对应的终端装置。
示例性地，通信装置向第一组播组发送第五指示信息，该第五指示信息用于指示第二集合，该第二集合为第一信道状态参数对应的终端装置的集合，第一组播组包括该第二集合，该第二集合包括第一终端装置。
相应地，第一终端装置接收该第五指示信息，根据第二集合，确定第一终端装置是第一信道状态参数对应的终端装置。
通信装置向第一组播组发送的第一指示信息和第五指示信息可以承载在同一组播消息中发送给第一组播组，也可以承载在不同的消息中发送给第一组播组。本申请对此不作限定。
可选地，通信装置根据第一组播组确定第二组播组，该第一组播组包括第二组播组，该第二组播组不包括第一组播组中的第二终端装置，若该第二终端装置对应的信道状态参数为第一组播组对应的信道状态参数的最小值，且该第二组播组中不包括与第一组播组的信道状态参数的最小值对应的终端装置，该通信装置根据第二组播组中的终端装置对应的信道状态参数，确定第二组播组对应的信道状态参数的最小值。
例如，第二终端装置需要退出组播组，第二终端装置退出组播组可以是通信装置基于业务确定的，例如，不再对第二终端装置提供组播服务，或者，第二终端装置退出组播组可以是通信装置基于第二终端装置的位置确定的，如第二终端装置的位置超出了通信装置发送组播信息的覆盖范围等，但本申请不限于此。通信装置将第二终端装置移出第一组播组，得到第二组播组，第二组播组包括多个终端装置。若第二终端装置对应的信道状态参数为第一信道状态参数，也就是说，组播组的信道状态参数最小值对应的终端装置移出组播组，通信装置需要判断是否重新确定信道状态参数的最小值。若第二组播组中包括与第 一信道状态参数对应的终端装置，第一信道状态参数仍为第二组播组对应的信道状态参数的最小值。若第二组播组中不包括第一信道状态参数对应的终端装置，则通信装置根据第二组播组中终端装置对应的信道状态参数，确定第二组播组对应的信道状态参数的最小值，并通知第二组播组。
根据本申请实施例提供的方案，组播组中的接收端在测量得到的信道状态参数小于组播组对应的信道状态参数的最小值时，通知组播信息的发送端，使得发送端能够更新组播组对应的信道状态参数的最小值，并基于当前第一组播组对应的信道状态参数的最小值，处理待发送的组播信息，以期组播组内的接收端均能够成功接收到该组播信息。进一步地，若接收端不是信道状态参数的最小值对应的接收端，当接收端测量得到的信道状态参数大于信道状态参数的最小值时，接收端不反馈信道状态参数。以及，若接收端是信道状态参数的最小值对应的接收端，当该接收端测量得到的信道状态参数等于信道状态参数的最小值时，接收端不反馈信道状态参数。能够减小传输资源开销，提高资源利用率，减小终端装置功耗。
实施例二
图4是本申请实施例提供的通信方法400的一个示意性流程图。图4所示实施例中以通信装置为RAN节点或配置于RAN节点以实现图4所示实施例提供的方法为例进行说明，应理解本申请不限于此，图4所示实施例中的RAN节点可以替换为通信装置。图4所示实施例中以终端装置为UE或终端装置配置于UE以实现图4所示实施例提供的方法为例进行说明，应理解本申请不限于此，图4所示实施例中的UE可以替换为终端装置，例如，图4所示实施例中的UE1可以替换为终端装置1、UE2可以替换为终端装置2、UE3可以替换为终端装置3等。作为示例非限定，终端装置可以是芯片。
如图4所示的RAN节点作为第一组播组的组播信息的发送端，第一组播组包括5个UE，如UE1、UE2、UE3、UE4和UE5。需要说明的是，图4中仅示出了第一组播组中的UE1和UE2，其他UE在具体实施中可以参考UE1或UE2的实施方式，为了简要，在此不再赘述。
可选地，S401，UE1向RAN节点发送指示信息A，该指示信息A用于指示UE1对应的CQI 1。
相应地，RAN节点接收来自UE1的该指示信息A。图4所示的实施例中CQI为信道状态参数的一个示例。
UE1可以测量RAN节点的参考信号，得到CQI_1。具体地，可以是UE1测量参考信号得到UE1与RAN节点之间的信道信息，并根据信道信息确定信道信息对应的CQI_1。CQI的值越小表征信道状态越差，CQI的值越大表征信道状态越好。一个CQI对应一种调制方式(如调制阶数等)和/或一种编码方式(如信道编码的码率和/或编码效率等)。
可选地，指示信息A可以承载在UE1向RAN节点发送的UCI中。
UE1可以是接入该RAN节点后向RAN节点发送该指示信息A，或者UE1可以是比较CQI_1与当前第一组播组对应的CQI的最小值的大小后，向RAN节点发送该指示信息A。
可选地，S402，UE2向RAN节点发送指示信息B，该指示信息B用于指示UE2对应的CQI_2。
相应地，RAN节点接收来自UE2的该指示信息B。UE2可以是接入该RAN节点后向RAN节点发送该指示信息B，或者UE2可以是比较CQI_2与当前第一组播组对应的CQI的最小值的大小后，向RAN节点发送该指示信息B。
可选地，指示信息B可以承载在UE2向RAN节点发送的UCI中。
需要说明的是，本申请实施例对S401与S402的执行顺序不作限定。
S403，RAN节点向第一组播组发送指示信息C，该指示信息C用于指示CQI_1，CQI_1为第一组播组对应的CQI的最小值。
相应地，第一组播组中的UE接收该指示信息C。
RAN节点通过第一组播组中的UE最近一次发送的指示信息，确定第一组播组中的每个UE对应的CQI，并在其中确定CQI的最小值为CQI_1。
例如，第一组播组中UE1对应的CQI为3(即CQI_1)，UE2对应的CQI为5(即CQI_2)，UE3对应的CQI为8，UE4对应的CQI为3，UE5对应的CQI为10。其中，最小CQI值为3，即CQI_1，RAN节点通过指示信息C通知第一组播组，第一组播组对应的最小CQI为3。
可选地，RAN节点向第一组播组发送指示信息D，该指示信息D用于指示第一集合，该第一集合包括CQI_1对应的UE。
例如上一示例中，CQI_1＝3，UE1、UE4对应的CQI均为3，该CQI_1对应的第一集合包括UE1和UE4，RAN节点可以发送指示信息D，该指示信息D可以包括UE1的标识信息和UE4的标识信息，第一组播组中的UE接收到该指示信息D可以确定最小CQI对应的UE。
可选地，指示信息C可以承载在RAN节点向第一组播组发送的RRC消息、MAC CE或DCI中。
S404，RAN节点向第一组播组发送组播信息，该组播信息的MCS是根据CQI_1确定的。
RAN节点确定第一组播组对应的CQI的最小值为CQI_1后，RAN节点可以根据该CQI_1确定向第一组播组发送的组播信息的MCS。
例如，CQI_1对应的调制方式为正交振幅调制(quadrature amplitude modulation，QAM)中的16QAM，RAN节点可以确定组播信息可以采用16QAM调制方式，以期第一组播组中的信道状态最差的UE可以接收到该组播信息。或者，RAN节点可以确定组播信息选择更小调制阶数的调制方式，提高组播信息的抗信道干扰能力，但本申请不限于此。
S405，UE2测量来自RAN节点的参考信号，得到CQI_3。
S406，UE2确定CQI_3大于CQI_1，UE2不发送用于指示CQI_3的指示信息。
UE2可以根据最近一次发送的CQI，即CQI_2，或者根据第一集合，确定UE2不是CQI1对应的UE，UE2测量得到的CQI_3大于CQI_2，由于第一组播组对应的最小CQI不发生改变，UE2不发送用于指示CQI_3的指示信息。能够减小传输资源的开销，提高资源利用率，且能够减小UE2的功耗。
若UE2测量得到的一个CQI小于或等于CQI_1，则UE2向RAN节点发送指示信息指示该CQI，若该CQI小于CQI_1，RAN节点可以重新确定第一组播组的最小CQI，并通知第一组播组；若该CQI等于CQI_1，RAN节点可以更新最小CQI对应的UE。可选地，可以通知第一组播组更新后的最小CQI对应的UE集合。
S407，UE1测量来自RAN节点的参考信号，得到CQI_4。
S408，UE1向RAN节点发送指示信息E，该指示信息E用于指示CQI_4。
其中，CQI_4大于CQI_1。相应地，RAN节点接收来自UE1的该指示信息E。
UE1可以根据最近一次发送的CQI，即CQI_1，或者根据第一集合，确定UE1是CQI1对应的UE，则当UE1测量得到的CQI_4大于CQI_1时，UE1向RAN节点发送指示信息E，通知UE1对应的CQI变更为CQI_4。
若UE1测量得到的CQI小于CQI_1时，UE1也向RAN节点发送指示信息，也就是说，当最小CQI对应的UE的CQI发生变化，UE将通知RAN节点，以便RAN节点判断是否更新第一组播组对应的最小CQI。
综上，组播组中的UE判断是否发送更新后的CQI的流程可以如图5所示，UEi测量得到CQIi,t，CQIi,t表示UEi第t次测量得到的CQI。当CQIi,t与上一次测量得到的CQIi,t-1不同，或者说UEi测量得到的CQI发生变化时，若UEi为最小CQI，即CQImin对应的UE，UEi发送CQIi，若UEi不是CQImin对应的UE，若CQIi≤CQImin，UEi发送CQIi，若CQIi＞CQImin，UE不发送CQIi。
RAN节点接收到该指示信息E后，确定UE1对应的CQI变更为CQI_4。
一种实施方式中，RAN节点当前第一组播组对应的CQI，确定第一组播组对应的CQI的最小值，若最小值不是CQI_1则RAN节点向第一组播组发送指示信息，指示更新后的第一组播组对应的CQI的最小值。若最小值仍为CQI_1则RAN节点不向第一组播组发送指示信息，更新第一组播组对应的CQI的最小值。
另一种实施方式中，RAN节点存储有第一集合，即CQI_1对应的UE的集合，如第一集合中包括UE1和UE4，当RAN节点接收到指示信息E后，确定UE1对应的CQI变更为CQI_4，则RAN节点将UE1从第一集合中移除，而第一集合不为空集，RAN节点确定第一组播组对应的最小CQI不变。
若第一集合移除UE1后变为空集，RAN节点根据第一组播组当前对应的CQI确定第一组播组对应的最小CQI。并确定该最小CQI对应的UE的集合。可选地，RAN节点向第一组播组发送该最小CQI对应的UE集合。
当RAN节点接收到来自UEi的CQIi后，
若CQIi＜CQImin，RAN节点更新CQImin，并通知第一组播组。
若CQIi＝CQImin，RAN节点增加CQImin对应的UE，例如RAN节点存储有CQImin对应的UE集合，则RAN节点将UEi加入该UE集合中。
若CQIi＞CQImin，一种实施方式中，RAN节点根据当前第一组播组对应的CQI确定更新的CQImin，或者，另一种实施方式中，RAN节点存储由CQImin对应的UE集合，RAN节点将UEi从该UE集合中删除，若该UE集合不为空，则CQImin不变；若该UE集合为空，RAN节点更新CQImin，并通知第一组播组，以及CQImin对应的UE集合，可选地，通知第一组播组更新后的CQImin对应的UE集合。
下面介绍当第一组播组中包含的UE发生变化时，RAN节点的操作。
当第一组播组中的UE退出该组播组时，RAN节点将该UE从第一组播组移除得到第二组播组。第二组播组包括多个UE。
RAN节点判断该UE是否为最小CQI(如当前最小CQI为CQI_1)对应的UE，若该UE为最小CQI对应的UE可以采用但不限于以下实施方式。
一种实施方式，RAN节点根据当前第二组播组中的UE对应的CQI，确定第二组播组对应的最小CQI，若该最小CQI不是CQI_1，RAN节点通知第二组播组，若最小CQI仍为CQI_1，则RAN节点不需要通知第二组播组。
另一种实施方式中，RAN节点存储由CQI_1对应的UE集合，如第一集合，若退出组播组的UE不属于该第一集合，则RAN节点确定第二组播组对应的最小CQI仍为CQI_1；若退出组播组的UE属于该第一集合，RAN节点从该第一集合中删除该UE，若删除该UE后第一集合不为空，则第二组播组对应的最小CQI仍为CQI_1；若第一集合中删除该UE后该第一集合为空，则RAN节点根据第二组播组中的UE对应的CQI，确定第二组播组对应的最小CQI，并通知第二组播组。RAN节点还可以确定该最小CQI对应的UE集合，可选地，RAN节点可以通知第二组播组该最小CQI对应的UE集合。
例如，第一组播组中的5个UE中，UE4将退出第一组播组，RAN节点将UE从第一组播组移除得到第二组播组，第二组播组包括UE1、UE2、UE3和UE5。比如，RAN节点存储的最小CQI对应的UE集合包括UE1和UE4，则RAN节点将UE4从该UE集合中移除，该UE集合不为空，则该第二组播组的最小CQI仍为UE1对应的最小CQI。而若RAN节点存储的最小CQI对应的UE集合仅包括UE4，RAN节点将UE4从该UE集合中删除后，该集合变为空集，RAN节点根据第二组播组中UE1、UE2、UE3和UE5当前对应的CQI确定最小CQI，如UE1对应的CQI为7、UE2对应的CQI为5、UE3对应的CQI为5和UE5对应的CQI为8，则RAN节点确定第二组播组对应的最小CQI为5，该最小CQI对应的UE集合为{UE2、UE3}。RAN节点可以通知第二组播组，该第二组播组对应的最小CQI为5。可选地，RAN节点还通知第二组播组该最小CQI对应的UE集合包括UE2和UE3。
当第一组播组中新加入一个UE时，RAN节点将该UE加入第一组播组得到第三组播组。RAN节点接收该UE发送的指示CQI的指示信息，确定该UE对应的CQI，若该UE对应的CQI小于第一组播组对应的最小CQI(如最小CQI为CQI_1)，则RAN节点将该UE对应的CQI确定为第三组播组对应的最小CQI，并通知第三组播组。若该UE对应的CQI大于或等于CQI_1，RAN节点确定第三组播组对应的最小CQI为CQI_1，并通知该UE第三组播组对应的最小CQI。
实施例三
图6是本申请实施例提供的通信方法600的一个示意性流程图。图6所示实施例中以终端装置包括UE，或终端装置配置于UE以实现图4所示实施例提供的方法为例进行说明，应理解本申请不限于此，图6所示实施例中的UE可以替换为终端装置，例如，图4所示实施例中的UE1可以替换为终端装置1、UE2可以替换为终端装置2、UE3可以替换为终端装置3等。作为示例非限定，终端装置可以是芯片。如图6所示的通信方法可以应用于V2X场景中，UE1作为第一组播组的组播信息的发送端，第一组播组包括5个UE，如UE1、UE2、UE3、UE4和UE5。需要说明的是，图6中仅示出了第一组播组中的UE1、UE2和UE3，其他UE在具体实施中可以参考UE2或UE3的实施方式，为了简要，在此不再赘述。
可选地，S601，UE2向UE1发送指示信息B，指示信息B用于指示UE2对应的CQI_2。
相应地，UE1接收来自UE2的指示信息B。
可选地，S602，UE3向UE1发送指示信息F，该指示信息F用于指示UE3对应的CQI_3。
相应地，UE1接收来自UE3的指示信息F。
作为示例非限定，用于指示UE对应的CQI的指示信息(如指示信息B、指示信息F)可以承载在SCI或PSSCH中。
S603，UE1向第一组播组中的UE发送指示信息G，该指示信息G用于指示CQI_2，该CQI_2为第一组播组对应的CQI的最小值。
相应地，第一组播组中的UE接收来自UE1的该指示信息G。
作为示例非限定，该指示信息G承载在UE1发送的SL RRC消息、MAC CE或SCI中。可选地，该指示信息G为组播信息。
S604，UE1向第一组播组发送组播信息，该组播信息的MCS是根据CQI_2确定的。
RAN节点确定第一组播组对应的CQI的最小值为CQI_2后，RAN节点可以根据该CQI_2确定向第一组播组发送的组播信息的MCS。
该组播信息可以包括但不限于组播的业务数据和/或SCI(例如第一级SCI)等。
S605，UE3测量来自UE1的参考信号，得到CQI_4。
S606，UE3确定CQI_4大于CQI_2，不发送用于指示CQI_4的指示信息。
UE3可以根据最新一次发送的CQI或者根据UE1指示的最小CQI对应的UE集合，确定UE3不是最小CQI(即CQI_2)对应的UE。
UE3在测量得到的CQI大于CQI_2的情况下，不发送用于指示该CQI的指示信息；以及UE3在测量得到的CQI小于或等于CQI_2的情况下，发送用于指示该CQI的指示信息。
S607，UE2测量来自UE1的参考信号，得到CQI_5。
S608，UE2向UE1发送指示信息H，该指示信息H用于指示CQI_5，其中，CQI_5不等于CQI_2。
相应地，UE1接收来自UE2的指示信息H。
UE2可以根据最新一次发送的CQI或者根据UE1指示的最小CQI对应的UE集合，确定UE2是最小CQI(即CQI_2)对应的UE。UE3在测量得到的CQI不等于CQI_2的情况下，发送用于指示该CQI的指示信息；在测量得到的CQI等于CQI_2的情况下，不发送用于指示该CQI的指示信息。
该第一组播组中接收组播信息的UE可以根据图5所示的流程确定是否发送测量得到的CQI。但本申请不限于此。
当UE1接收到来自一个UE的用于指示CQI的指示信息后，可以参考实施例一中通信装置或实施例二中RAN节点的操作流程，为了简要，在此不在赘述。
根据本申请实施例提供的方案，组播组中的接收端在测量得到的信道状态参数小于组播组对应的信道状态参数的最小值时，通知组播信息的发送端，使得发送端能够更新组播组对应的信道状态参数的最小值，并基于当前第一组播组对应的信道状态参数的最小值，处理待发送的组播信息，以期组播组内的接收端均能够成功接收到该组播信息。进一步地，若接收端不是信道状态参数的最小值对应的接收端，当接收端测量得到的信道状态参数大于信道状态参数的最小值时，接收端不反馈信道状态参数。以及，若接收端是信道状态参数的最小值对应的接收端，当该接收端测量得到的信道状态参数等于信道状态参数的最小值时，接收端不反馈信道状态参数。能够减小传输资源开销，提高资源利用率，减小终端 装置功耗。
需要说明的是，本申请实施例提供的流程图如图3、图4、图6所示的步骤编号并不对其执行顺序进行限定。本申请实施例中的各个步骤之间的执行顺序，由其相互之间的逻辑关系确定。上述实施例可以单独实施，也可以通过相互结合的方式实施，对于相同或相似的概念或过程可以相互引用，可能在某些实施例中不再赘述。
以上，结合图3至图6详细说明了本申请实施例提供的方法。以下，结合图7至图9详细说明本申请实施例提供的通信装置和通信设备。为了实现上述本申请实施例提供的方法中的各功能，各网元可以包括硬件结构和/或软件模块，以硬件结构、软件模块、或硬件结构加软件模块的形式来实现上述各功能。上述各功能中的某个功能以硬件结构、软件模块、还是硬件结构加软件模块的方式来执行，取决于技术方案的特定应用和设计约束条件。
图7是本申请实施例提供的通信装置的示意性框图。如图7所示，该通信装置700可以包括收发单元720。
在一种可能的设计中，该通信装置700可对应于上文方法实施例中的终端装置，该通信装置700可以是终端设备或配置于终端设备的装置，例如芯片。
应理解，该通信装置700可对应于根据上述本申请实施例的方法中的终端装置，该通信装置700可以包括用于执行图3至图6中的方法中终端装置执行的方法的单元。并且，该通信装置700中的各单元和上述其他操作和/或功能分别为了实现图3至图6中的方法的相应流程。
可选地，通信装置700还可以包括处理单元710，该处理单元710可以用于处理指令或者数据，以实现相应的操作。
还应理解，该通信装置700为配置于(或用于)终端设备中的芯片时，该通信装置700中的收发单元720可以为芯片的输入/输出接口或电路，该通信装置700中的处理单元710可以为芯片中的处理器。
可选地，通信装置700还可以包括存储单元730，该存储单元730可以用于存储指令或者数据，处理单元710可以执行该存储单元中存储的指令或者数据，以使该通信装置实现相应的操作。
还应理解，各单元执行上述相应步骤的具体过程在上述方法实施例中已经详细说明，为了简洁，在此不再赘述。
在另一种可能的设计中，该通信装置700可对应于上文方法实施例中的通信装置。该通信装置700可以是通信设备或是配置于通信设备的装置，例如芯片。其中，该通信设备可以是终端设备或者网络设备。
应理解，该通信装置700可对应于根据上述本申请实施例的方法中的通信装置，该通信装置700可以包括用于执行图3至图6中的方法中通信装置执行的方法的单元。并且，该通信装置700中的各单元和上述其他操作和/或功能分别为了实现图3至图6中的方法的相应流程。
可选地，通信装置700还可以包括处理单元710，该处理单元710可以用于处理指令或者数据，以实现相应的操作。
还应理解，该通信装置700为配置于(或用于)通信设备中的芯片时，该通信装置700中的收发单元720可以为芯片的输入/输出接口或电路，该通信装置700中的处理单元 710可以为芯片中的处理器。
可选地，通信装置700还可以包括存储单元730，该存储单元730可以用于存储指令或者数据，处理单元710可以执行该存储单元中存储的指令或者数据，以使该通信装置实现相应的操作。
还应理解，各单元执行上述相应步骤的具体过程在上述方法实施例中已经详细说明，为了简洁，在此不再赘述。
应理解，该通信装置700中的收发单元720为可通过通信接口(如收发器或输入/输出接口)实现，例如可对应于图8中示出的终端设备800中的收发器810。该通信装置700中的处理单元710可通过至少一个处理器实现，例如可对应于图8中示出的终端设备800中的处理器820。该通信装置700中的处理单元710还可以通过至少一个逻辑电路实现。该通信装置700中的存储单元730可对应于图8中示出的终端设备800中的存储器。
应理解，该通信装置700为网络设备时，该通信装置700中的收发单元720为可通过通信接口(如收发器或输入/输出接口)实现，例如可对应于图9中示出的网络设备900中的收发器910。该通信装置700中的处理单元710可通过至少一个处理器实现，例如可对应于图9中示出的网络设备900中的处理器920，该通信装置700中的处理单元710可通过至少一个逻辑电路实现。
图8是本申请实施例提供的终端设备800的结构示意图。该终端设备800可应用于如图1所示的系统中，执行上述方法实施例中终端装置或通信装置的功能。如图所示，该终端设备800包括处理器820和收发器810。可选地，该终端设备800还包括存储器。其中，处理器820、收发器810和存储器之间可以通过内部连接通路互相通信，传递控制和/或数据信号。该存储器用于存储计算机程序，该处理器820用于执行该存储器中的该计算机程序，以控制该收发器810收发信号。
上述处理器820可以和存储器可以合成一个处理装置，处理器820用于执行存储器中存储的程序代码来实现上述功能。具体实现时，该存储器也可以集成在处理器820中，或者独立于处理器820。该处理器820可以与图7中的处理单元对应。
上述收发器810可以与图7中的收发单元对应。收发器810可以包括接收器(或称接收机、接收电路)和发射器(或称发射机、发射电路)。其中，接收器用于接收信号，发射器用于发射信号。
应理解，图8所示的终端设备800能够实现图3至图6所示方法实施例中涉及终端装置的过程。终端设备800中的各个模块的操作和/或功能，分别为了实现上述方法实施例中的相应流程。具体可参见上述方法实施例中的描述，为避免重复，此处适当省略详细描述。
上述处理器820可以用于执行前面方法实施例中描述的由终端装置内部实现的动作，而收发器810可以用于执行前面方法实施例中描述的发送或接收的动作。具体请见前面方法实施例中的描述，此处不再赘述。
可选地，上述终端设备800还可以包括电源，用于给终端设备中的各种器件或电路提供电源。
除此之外，为了使得终端设备的功能更加完善，该终端设备800还可以包括输入输出装置，如包括输入单元、显示单元、音频电路、摄像头和传感器等中的一个或多个，所述音频电路还可以包括扬声器、麦克风等。
图9是本申请实施例提供的网络设备的结构示意图，该网络设备900可应用于如图1所示的系统中，执行上述方法实施例中通信装置的功能。如图9所示，该网络设备900包括处理器920和收发器910。可选地，该网络设备900还包括存储器。其中，处理器920、收发器910和存储器之间可以通过内部连接通路互相通信，传递控制和/或数据信号。该存储器用于存储计算机程序，该处理器920用于执行该存储器中的该计算机程序，以控制该收发器910收发信号。
上述处理器920可以和存储器可以合成一个处理装置，处理器920用于执行存储器中存储的程序代码来实现上述功能。具体实现时，该存储器也可以集成在处理器820中，或者独立于处理器920。该处理器920可以与图7中的处理单元对应。
上述收发器910可以与图7中的收发单元对应。收发器910可以包括接收器(或称接收机、接收电路)和发射器(或称发射机、发射电路)。其中，接收器用于接收信号，发射器用于发射信号。
应理解，图9所示的网络设备900能够实现图3至图6所示方法实施例中涉及通信装置的各个过程。网络设备900中的各个模块的操作和/或功能，分别为了实现上述方法实施例中的相应流程。具体可参见上述方法实施例中的描述，为避免重复，此处适当省略详细描述。
上述处理器920可以用于执行前面方法实施例中描述的由通信装置内部实现的动作，而收发器910可以用于执行前面方法实施例中发送或接收的动作。具体请见前面方法实施例中的描述，此处不再赘述。
本申请实施例还提供了一种处理装置，包括处理器和(通信)接口；所述处理器用于执行上述任一方法实施例中的方法。
应理解，上述处理装置可以是一个或多个芯片。例如，该处理装置可以是现场可编程门阵列(field programmable gate array，FPGA)，可以是专用集成芯片(application specific integrated circuit，ASIC)，还可以是系统芯片(system on chip，SoC)，还可以是中央处理器(central processor unit，CPU)，还可以是网络处理器(network processor，NP)，还可以是数字信号处理电路(digital signal processor，DSP)，还可以是微控制器(micro controller unit，MCU)，还可以是可编程控制器(programmable logic device，PLD)或其他集成芯片。
根据本申请实施例提供的方法，本申请还提供一种计算机程序产品，该计算机程序产品包括：计算机程序代码，当该计算机程序代码由一个或多个处理器执行时，使得包括该处理器的装置执行图3至图6所示实施例中的方法。
本申请实施例提供的技术方案可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时，可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行所述计算机程序指令时，全部或部分地产生按照本申请实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、网络设备、终端设备、核心网设备、机器学习设备或者其他可编程装置。所述计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所述计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户线(digital subscriber line，DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服 务器或数据中心进行传输。所述计算机可读存储介质可以是计算机可以存取的任何可用介质或者是包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质(例如，软盘、硬盘、磁带)、光介质(例如，数字视频光盘(digital video disc，DVD))、或者半导体介质等。
根据本申请实施例提供的方法，本申请还提供一种计算机可读存储介质，该计算机可读存储介质存储有程序代码，当该程序代码由一个或多个处理器运行时，使得包括该处理器的装置执行图3至图6所示实施例中的方法。
根据本申请实施例提供的方法，本申请还提供一种系统，其包括前述的多个终端装置。还系统还可以进一步包括前述的一个或多个通信装置。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统、装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以所述权利要求的保护范围为准。

Claims (30)

  1. 一种通信方法，其特征在于，包括：
    第一终端装置接收来自通信装置的第一指示信息，所述第一指示信息用于指示第一信道状态参数，所述第一信道状态参数为第一组播组对应的信道状态参数的最小值，所述第一组播组包括接收同一组播信息的多个终端装置，所述多个终端装置包括所述第一终端装置；
    所述第一终端装置测量来自所述通信装置的参考信号，得到第二信道状态参数；
    若所述第二信道状态参数小于所述第一信道状态参数，所述第一终端装置向所述通信装置发送第二指示信息，所述第二指示信息用于指示所述第二信道状态参数。
  2. 根据权利要求1所述的方法，其特征在于，所述方法还包括：
    若所述第二信道状态参数大于所述第一信道状态参数，所述第一终端装置不向所述通信装置发送所述第二指示信息；和/或，
    若所述第二信道状态参数等于所述第一信道状态参数，所述第一终端装置向所述通信装置发送所述第二指示信息。
  3. 根据权利要求1或2所述的方法，其特征在于，所述方法还包括：
    所述第一终端装置接收来自所述通信装置的第三指示信息，所述第三指示信息用于指示第一集合，所述第一集合为所述第一信道状态参数对应的终端装置的集合，所述第一组播组包括所述第一集合，所述第一集合不包括所述第一终端装置。
  4. 根据权利要求1至3中任一项所述的方法，其特征在于，所述第一终端装置接收来自所述通信装置的所述第一指示信息之前，所述方法还包括：
    第一终端装置向通信装置发送第四指示信息，所述第四指示信息用于指示第三信道状态参数，所述第三信道状态参数为测量得到的所述第一终端装置对应的信道状态参数。
  5. 根据权利要求1所述的方法，其特征在于，所述方法还包括：
    若所述第二信道状态参数大于所述第一信道状态参数，所述第一终端装置向所述通信装置发送所述第二指示信息；和/或，
    若所述第二信道状态参数等于所述第一信道状态参数，所述第一终端装置不向所述通信装置发送所述第二指示信息。
  6. 根据权利要求5所述的方法，其特征在于，所述方法还包括：
    所述第一终端装置接收来自所述通信装置的第五指示信息，所述第五指示信息用于指示第二集合，所述第二集合为所述第一信道状态参数对应的终端装置的集合，所述第一组播组包括所述第二集合，所述第二集合包括所述第一终端装置。
  7. 根据权利要求5或6所述的方法，其特征在于，所述第一终端装置接收来自通信装置的所述第一指示信息之前，所述方法还包括：
    第一终端装置向通信装置发送第六指示信息，所述第六指示信息用于指示所述第一信道状态参数，所述第一信道状态参数为测量得到的所述第一终端装置对应的信道状态参数。
  8. 一种通信方法，其特征在于，包括：
    通信装置向第一组播组发送第一指示信息，所述第一指示信息用于指示第一信道状态参数，所述第一信道状态参数为第一组播组对应的信道状态参数的最小值，所述第一组播组包括接收同一组播信息的多个终端装置；
    所述通信装置接收来自第一终端装置的第二指示信息，所述第二指示信息用于指示第二信道状态参数，所述第二信道状态参数小于所述第一信道状态参数，所述多个终端装置包括所述第一终端装置。
  9. 根据权利要求8所述的方法，其特征在于，所述方法还包括；
    所述通信装置向所述第一组播组发送组播信息，所述组播信息的调制方式和/或编码方式是根据所述第一组播组对应的信道状态参数的最小值确定的。
  10. 根据权利要求8或9所述的方法，其特征在于，所述通信装置向所述第一组播组发送所述第一指示信息之前，所述方法还包括：
    所述通信装置接收来自所述第一组播组的多个指示信息，所述多个指示信息中的一个指示信息用于指示所述第一组播组中的一个终端装置对应的信道状态参数，所述第一信道状态参数为所述多个指示信息指示的信道状态参数中的最小值。
  11. 根据权利要求10所述的方法，其特征在于，所述多个指示信息中包括来自所述第一终端装置的第四指示信息，所述第四指示信息用于指示第三信道状态参数，以及，所述方法还包括：
    所述通信装置向所述第一终端装置发送第三指示信息，所述第三指示信息用于指示第一集合，所述第一集合为所述第一信道状态参数对应的终端装置的集合，所述第一组播组包括所述第一集合，所述第一集合不包括所述第一终端装置。
  12. 根据权利要求10所述的方法，其特征在于，所述多个指示信息中包括来自所述第一终端装置的第六指示信息，所述第六指示信息用于指示第一信道状态参数，以及，所述方法还包括：
    所述通信装置向所述第一终端装置发送第五指示信息，所述第五指示信息用于指示第二集合，所述第二集合为所述第一信道状态参数对应的终端装置的集合，所述第一组播组包括所述第二集合，所述第二集合包括所述第一终端装置。
  13. 根据权利要求8至12中任一项所述的方法，其特征在于，所述方法还包括：
    所述通信装置根据所述第一组播组确定第二组播组，所述第一组播组包括所述第二组播组，所述第二组播组中不包括所述第一组播组中的第二终端装置，
    若所述第二终端装置对应的信道状态参数为所述第一组播组对应的信道状态参数的最小值，且所述第二组播组中的终端装置不对应所述第一组播组的信道状态参数的最小值，所述通信装置根据所述第二组播组中的终端装置对应的信道状态参数，确定所述第二组播组对应的信道状态参数的最小值。
  14. 一种通信装置，其特征在于，包括：
    收发单元，用于接收来自通信装置的第一指示信息，所述第一指示信息用于指示第一信道状态参数，所述第一信道状态参数为第一组播组对应的信道状态参数的最小值，所述第一组播组包括接收同一组播信息的多个终端装置，所述多个终端装置包括第一终端装置；
    处理单元，用于测量来自所述通信装置的参考信号，得到第二信道状态参数；
    所述收发单元还用于在所述第二信道状态参数小于所述第一信道状态参数的情况下，向所述通信装置发送第二指示信息，所述第二指示信息用于指示所述第二信道状态参数。
  15. 根据权利要求14所述的装置，其特征在于，
    所述处理单元还用于在所述第二信道状态参数大于所述第一信道状态参数的情况下，确定不向所述通信装置发送所述第二指示信息；和/或，
    所述收发单元还用于在所述第二信道状态参数等于所述第一信道状态参数的情况下，向所述通信装置发送所述第二指示信息。
  16. 根据权利要求14或15所述的装置，其特征在于，
    所述收发单元还用于接收来自所述通信装置的第三指示信息，所述第三指示信息用于指示第一集合，所述第一集合为所述第一信道状态参数对应的终端装置的集合，所述第一组播组包括所述第一集合，所述第一集合不包括所述第一终端装置。
  17. 根据权利要求14至16中任一项所述的装置，其特征在于，所述收发单元接收来自通信装置的所述第一指示信息之前，所述收发单元还用于向通信装置发送第四指示信息，所述第四指示信息用于指示第三信道状态参数，所述第三信道状态参数为测量得到的所述第一终端装置对应的信道状态参数。
  18. 根据权利要求14所述的装置，其特征在于，
    所述收发单元还用于在所述第二信道状态参数大于所述第一信道状态参数的情况下，向所述通信装置发送所述第二指示信息；和/或，
    所述处理单元还用于在所述第二信道状态参数等于所述第一信道状态参数的情况下，不向所述通信装置发送所述第二指示信息。
  19. 根据权利要求18所述的装置，其特征在于，
    所述收发单元还用于接收来自所述通信装置的第五指示信息，所述第五指示信息用于指示第二集合，所述第二集合为所述第一信道状态参数对应的终端装置的集合，所述第一组播组包括所述第二集合，所述第二集合包括所述第一终端装置。
  20. 根据权利要求18或19所述的装置，其特征在于，所述收发单元接收来自通信装置的所述第一指示信息之前，所述收发单元还用于向通信装置发送第六指示信息，所述第六指示信息用于指示所述第一信道状态参数，所述第一信道状态参数为测量得到的所述第一终端装置对应的信道状态参数。
  21. 一种通信装置，其特征在于，包括：
    处理单元，用于确定第一信道状态参数，所述第一信道状态参数为第一组播组对应的信道状态参数的最小值，所述第一组播组包括接收同一组播信息的多个终端装置；
    收发单元，用于向第一组播组发送第一指示信息，所述第一指示信息用于指示第一信道状态参数；
    所述收发单元还接收来自第一终端装置的第二指示信息，所述第二指示信息用于指示第二信道状态参数，所述第二信道状态参数小于所述第一信道状态参数，所述多个终端装置包括所述第一终端装置。
  22. 根据权利要求21所述的装置，其特征在于，
    所述收发单元还用于向所述第一组播组发送组播信息，所述组播信息的调制方式和/或编码方式是根据所述第一组播组对应的信道状态参数的最小值确定的。
  23. 根据权利要求21或22所述的装置，其特征在于，所述收发单元向所述第一组播组发送所述第一指示信息之前，所述收发单元还用于接收来自所述第一组播组的多个指示信息，所述多个指示信息中的一个指示信息用于指示所述第一组播组中的一个终端装置对应的信道状态参数，所述第一信道状态参数为所述多个指示信息指示的信道状态参数中的最小值。
  24. 根据权利要求23所述的装置，其特征在于，所述多个指示信息中包括来自所述第 一终端装置的第四指示信息，所述第四指示信息用于指示第三信道状态参数，以及，
    所述收发单元还用于向所述第一终端装置发送第三指示信息，所述第三指示信息用于指示第一集合，所述第一集合为所述第一信道状态参数对应的终端装置的集合，所述第一组播组包括所述第一集合，所述第一集合不包括所述第一终端装置。
  25. 根据权利要求23所述的装置，其特征在于，所述多个指示信息中包括来自所述第一终端装置的第六指示信息，所述第六指示信息用于指示第一信道状态参数，以及，
    所述收发单元还用于向所述第一终端装置发送第五指示信息，所述第五指示信息用于指示第二集合，所述第二集合为所述第一信道状态参数对应的终端装置的集合，所述第一组播组包括所述第二集合，所述第二集合包括所述第一终端装置。
  26. 根据权利要求21至25中任一项所述的装置，其特征在于，所述处理单元还用于：
    根据所述第一组播组确定第二组播组，所述第一组播组包括所述第二组播组，所述第二组播组中不包括所述第一组播组中的第二终端装置，
    在所述第二终端装置对应的信道状态参数为所述第一组播组对应的信道状态参数的最小值，且所述第二组播组中的终端装置不对应所述第一组播组的信道状态参数的最小值的情况下，根据所述第二组播组中的终端装置对应的信道状态参数，确定所述第二组播组对应的信道状态参数的最小值。
  27. 一种通信装置，其特征在于，包括至少一个处理器，与存储器耦合；
    所述存储器用于存储程序或指令；
    所述至少一个处理器用于执行所述程序或指令，以使所述装置实现如权利要求1至7中任一项所述的方法，或者如权利要求8至13中任一项所述的方法。
  28. 一种芯片，其特征在于，包括至少一个处理器和通信接口；
    所述通信接口用于接收输入所述芯片的信号或从所述芯片输出的信号，所述处理器与所述通信接口通信且通过逻辑电路或执行代码指令实现如权利要求1至7中任一项所述的方法，或者如权利要求8至13中任一项所述的方法。
  29. 一种计算机可读存储介质，其特征在于，存储有指令，当所述指令在计算机上运行时，使得所述计算机执行如权利要求1至7中任一项所述的方法，或者如权利要求8至13中任一项所述的方法。
  30. 一种计算机程序产品，其特征在于，包括指令，当所述指令在计算机上运行时，使得计算机执行如权利要求1至7中任一项所述的方法，或者如权利要求8至13中任一项所述的方法。
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