WO2023274182A1 - Data sending and receiving method and apparatus - Google Patents

Data sending and receiving method and apparatus Download PDF

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Publication number
WO2023274182A1
WO2023274182A1 PCT/CN2022/101686 CN2022101686W WO2023274182A1 WO 2023274182 A1 WO2023274182 A1 WO 2023274182A1 CN 2022101686 W CN2022101686 W CN 2022101686W WO 2023274182 A1 WO2023274182 A1 WO 2023274182A1
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srs
multicast
terminal device
time
antenna port
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PCT/CN2022/101686
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French (fr)
Chinese (zh)
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刘荣宽
向铮铮
卢磊
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华为技术有限公司
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Publication of WO2023274182A1 publication Critical patent/WO2023274182A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/02—Arrangements for optimising operational condition
    • 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
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/121—Wireless traffic scheduling for groups of terminals or users

Definitions

  • the present application relates to the technical field of communications, and in particular to a data sending and receiving method and device.
  • the data transmission link between the user equipment (User Equipment, UE) and the base station is called the uplink (UE transmits data to the base station Information link) or downlink (a link for a base station to send information to a UE), and a link for transmitting data between UEs is called a sidelink (Sidelink, SL).
  • Sidelinks can usually be applied to vehicle-to-everything (V2X) scenarios, or direct-connected communication scenarios such as device-to-device (D2D).
  • V2X vehicle-to-everything
  • D2D device-to-device
  • the downlink and sidelink can support multicast and broadcast in addition to unicast.
  • beamforming or precoding technology can be used to generate directional beams by adjusting the phase, signal amplitude and transmission power of the transmitted signal, so as to expand signal coverage, improve edge throughput and suppress interference problems, etc.
  • the base station needs to obtain channel state information (Channel State Information, CSI) to perform beamforming or precoding technology on the downlink.
  • CSI Channel State Information
  • the UE can send a channel sounding reference signal (Sounding Reference Signal, SRS), and the base station can obtain the channel state information between the UE and the base station by using the channel mutuality through measurement and estimation.
  • the base station can send a reference signal (Reference Signal, RS) of channel state information (Channel State Information, CSI) to the UE, and the UE obtains the CSI by measuring the CSI-RS, and then sends a CSI report to the base station, so that the base station can report based on the CSI Obtain channel state information between the UE and the base station.
  • RS Reference Signal
  • RS Reference Signal
  • CSI Channel State Information
  • the sender device can send the same service data through Space Division Multiple Access (SDMA), but the transmit power of the signal is allocated to different UEs, and there is mutual interference between the transmit signals of different UEs , causing the transmission power of the signal to not be effectively utilized. Therefore, it is necessary to study a more efficient physical layer multicast technology to solve the problem of waste of transmission resources in multicast services.
  • SDMA Space Division Multiple Access
  • the present application provides a data sending and receiving method and device, which can reduce the waste of transmission resources in multicast services and effectively improve spectrum utilization.
  • a method for sending and receiving data is provided.
  • the method may be executed by a first device, or may be executed by a chip applied to the first device.
  • the following only takes the first device as an example for execution.
  • the method includes: the first device sends channel sounding reference signal SRS configuration information to at least one terminal device in the first multicast group, and the SRS configuration information indicates the first time-frequency resource used for sending the SRS, the sequence of the SRS and the configuration information used for sending the SRS.
  • the first device receives at least one SRS from at least one terminal device on the first time-frequency resource, and determines multicast channel state information based on the at least one SRS, wherein the time-frequency resources bearing at least one SRS are the same, and The sequence of at least one SRS is the same; the first device determines the physical layer multicast beamforming or precoding matrix according to the multicast channel state information; the first device sends to at least one terminal device according to the physical layer multicast beamforming or precoding matrix Multicast data.
  • the first device may configure SRS configuration information for at least one terminal device (for example, it may be multicast-specific SRS configuration information), at least one terminal device in the multicast group can send the same sequence of SRSs to the first device on the same time-frequency resource, and at least one SRS on the same time-frequency resource can be used by the sending side device.
  • SRS configuration information for example, it may be multicast-specific SRS configuration information
  • at least one terminal device in the multicast group can send the same sequence of SRSs to the first device on the same time-frequency resource, and at least one SRS on the same time-frequency resource can be used by the sending side device.
  • It is regarded as an integrated SRS, so as to realize the effective measurement of the multicast channel by the sending side device and obtain the channel state information of the multicast channel.
  • the first device can determine the physical layer multicast beamforming or precoding matrix according to the channel state information of the multicast channel, which is used to send multicast data to at least one terminal device in the first multicast group, which improves the physical layer group
  • the utilization rate of spectrum resources for multicast transmission can be minimized, and the waste of transmission resources in multicast services can be reduced as much as possible.
  • At least one SRS is transmitted through the same antenna port.
  • multiple terminal devices send SRSs to the first device from the same antenna ports, and at least one SRS is used by the first device to measure and estimate the multicast channel between the first device and multiple receiving side devices , so that at least one SRS sent by the same time-frequency resource and the same port can improve the effectiveness of multicast channel measurement and improve the accuracy of multicast channel measurement.
  • the method further includes: the first device receives at least one antenna port indication information from at least one terminal device, where the antenna port indication information is used to indicate the number of antenna ports of the corresponding terminal device, or, the corresponding terminal device's A set of antenna port indexes; the first device determines an antenna port for sending the SRS according to at least one antenna port indication information.
  • At least one terminal device reports its own antenna port indication information to the first device, for example, the number of antenna ports supported by each terminal device or the set of antenna port indexes, so that the first device can
  • the antenna port indication information of the antenna port determines the antenna port used to send the SRS, so that each terminal device uses the same antenna port to send the SRS, which improves the accuracy and flexibility of the multicast channel measurement.
  • the method further includes: the first device sends first control information to at least one terminal device according to the physical layer multicast beamforming or precoding matrix, and the first control information is used to indicate the timing of the multicast data.
  • the frequency resource, wherein the first control information further includes a group identifier of the first multicast group.
  • the first device may multicast and send the first control information to at least one terminal device according to the physical layer multicast beamforming or precoding matrix, for example
  • the first control information may be SCI or DCI, which is used to notify at least one terminal device of time-frequency resources for transmitting multicast data, so that the beam coverage of the first control information and the effectiveness of communication can be improved.
  • the first device does not need to separately send the first control information to at least one terminal device, which can effectively save signaling overhead, save communication resources, and improve the efficiency of the communication system.
  • the multicast data is carried on the second time-frequency resource, where the second time-frequency resource is the same as the frequency domain resource of the first time-frequency resource, or the frequency domain resource of the second time-frequency resource is the same as the frequency domain resource of the first time-frequency resource.
  • a subset of frequency domain resources of a time-frequency resource is carried on the second time-frequency resource, where the second time-frequency resource is the same as the frequency domain resource of the first time-frequency resource, or the frequency domain resource of the second time-frequency resource is the same as the frequency domain resource of the first time-frequency resource.
  • the first device may perform multicast channel measurement on the multicast channel bandwidth through at least one received SRS, and sending multicast data may occupy part or all of the measured bandwidth of the multicast channel, thereby improving
  • the effectiveness of multicast channel measurement and utilization is improved, the efficiency of multicast data transmission is improved, and the data transmission performance of the communication system is improved.
  • the first device is a network device, or the first device is a terminal device in the first multicast group.
  • the solution when the first device is a network device, the solution is applicable to downlink multicast channel measurement and downlink multicast data transmission; when the first device is a terminal device on the sending side in the first multicast group, This solution can also be applied to the multicast channel measurement of the side link and the transmission of the side multicast data.
  • the technical solution is more general and flexible, and improves the data transmission efficiency of the multicast communication, thereby improving the data transmission performance of the communication system.
  • the first device sends a piece of SRS configuration information to at least one terminal device, or the first device sends corresponding SRS configuration information to each of the at least one terminal device, and each terminal device corresponds to The SRS configuration information is the same.
  • the first device may send group-specific SRS configuration information corresponding to the first multicast group to at least one terminal device through a signaling, thereby effectively saving communication signaling. If the first device sends the same SRS configuration information to each of the at least one terminal device before forming a group through the first multicast, thereby improving the flexibility and realizability of the SRS configuration information.
  • a method for obtaining multicast channel state information is provided.
  • This method can be executed by the first terminal device, or can be executed by a chip applied to the first terminal device.
  • only the execution subject is the first terminal device.
  • the method includes: the first terminal device receives channel sounding reference signal SRS configuration information from the first device, and the SRS configuration information indicates a first time-frequency resource for sending SRS, a sequence of SRS and an antenna port for sending SRS; A terminal device sends a first SRS to a first device on a first time-frequency resource, the first terminal device belongs to a first multicast group, and the first time-frequency resource carries at least one message from at least one terminal device in the first multicast group One SRS, and the first SRS belongs to at least one SRS, and the at least one SRS is used for the first device to determine multicast channel state information; the first terminal device receives multicast data from the first device.
  • At least one SRS is transmitted through the same antenna port.
  • the method further includes: the first terminal device sends antenna port indication information to the first device, where the antenna port indication information is used to indicate the number of antenna ports of the first terminal device, or the antenna port number of the first terminal device A set of port indexes; the antenna port indication information is used by the first device to determine the antenna port used to send the SRS.
  • the method further includes: the first terminal device receives first control information from the first device, the first control information is used to indicate the time-frequency resource of the multicast data, wherein the first control information further includes The group identifier of the first multicast group, and the first control information are sent by the first device according to a physical layer multicast beamforming or a precoding matrix.
  • the multicast data is carried on the second time-frequency resource, where the second time-frequency resource is the same as the frequency domain resource of the first time-frequency resource, or the frequency domain resource of the second time-frequency resource is the same as the frequency domain resource of the first time-frequency resource.
  • a subset of frequency domain resources of a time-frequency resource is carried on the second time-frequency resource, where the second time-frequency resource is the same as the frequency domain resource of the first time-frequency resource, or the frequency domain resource of the second time-frequency resource is the same as the frequency domain resource of the first time-frequency resource.
  • the first device is a network device, or the first device is a terminal device in the first multicast group.
  • a method for acquiring multicast channel state information is provided.
  • the method may be executed by the first device, or may be executed by a chip applied to the first device.
  • the following only takes the first device as an example for execution.
  • the method includes: the first device sends at least one first configuration information to at least one terminal device in the first multicast group, the first configuration information is used to indicate the time-frequency resource of channel state information CSI report; the first device sends at least one terminal device The device sends a channel state information reference signal CSI-RS; the first device receives at least one CSI report from at least one terminal device; the first device determines a physical layer multicast beamforming or precoding matrix according to the at least one CSI report; the first device The multicast data is sent to at least one terminal device according to the physical layer multicast beamforming or the precoding matrix.
  • the first device can configure the first configuration information for at least one terminal device, that is, the multicast channel-specific CSI report configuration information, so that the first device can determine the channel state of the multicast channel between the first device and at least one terminal device according to the CSI reports fed back by different terminal devices on the time-frequency resources indicated by the first configuration information information.
  • the first device can determine a physical layer multicast beam attribute or a precoding matrix suitable for multicast transmission according to the channel state information of the multicast channel, and use it to send multicast data, thereby improving the utilization rate of spectrum resources for physical layer multicast transmission, The waste of transmission resources in the multicast service is reduced as much as possible.
  • the first configuration information includes a first time limit
  • the first configuration information is used to instruct at least one terminal device to send a CSI report within the first time limit.
  • the first configuration information may include the time domain constraint that the terminal device sends CSI, that is, the first time limit, so that the first device can restrict different terminal devices in the multicast group to be within the preset time constraint, Reporting the CSI report, it can be considered that the channel state change can be ignored within the first time limit, so that the first device can determine the multicast channel state information according to the channel state information reflected by multiple CSI reports.
  • the multicast channel state information can be more accurate, and the utilization rate of the multicast channel can be effectively improved .
  • the first configuration information is used to indicate a period and a starting time point of the time-frequency resource reported by the channel state information (CSI).
  • CSI channel state information
  • the first device may configure the manner in which the terminal device reports the CSI report to be periodic, then the first device may include the time domain constraint that the terminal device periodically sends the CSI report in the first configuration information, That is, the sending cycle and the starting time point, so that the first device can limit that different terminal devices in the multicast group can report the CSI report synchronously at the preset starting time, and report the CSI report at the same period, so that the first device
  • the multicast channel state information that can be determined according to the channel state information reflected by multiple CSI reports is more immediate and accurate, and effectively improves the utilization rate of the multicast channel.
  • the method further includes: the first device sends a control element MAC CE of the media access control layer to at least one terminal device, for instructing at least one terminal device to send a CSI report to the first device.
  • the first device may also configure the way the terminal device reports the CSI report as semi-static, that is, the first device sends a MAC CE to at least one terminal device to instruct the terminal device to send the CSI report to the first device. report, so as to improve the flexibility of the terminal device to report the CSI report.
  • the method further includes: the first device sends second control information to at least one terminal device, which is used to instruct at least one terminal device to send a CSI report and immediacy to the first device.
  • the manner in which the terminal device reports the CSI report may also be aperiodic, that is, the first device sends the second control information to at least one terminal device, for example, the second control information may specifically be SCI or DCI, and the second control The information may be used to instruct the terminal device to send the CSI report to the first device, thereby improving the flexibility and immediacy of reporting the CSI report by the terminal device.
  • the method further includes: the first device sends third control information to at least one terminal device according to the physical layer multicast beamforming or precoding matrix, and the third control information is used to indicate the timing of the multicast data. frequency resources, wherein the third control information further includes a group identifier of the first multicast group.
  • the first device may send third control information to at least one terminal device according to the physical layer multicast beamforming or precoding matrix, such as the third
  • the control information may specifically be SCI or DCI, and the third control information may be used to notify at least one terminal device of time-frequency resources for transmitting multicast data, thereby improving beam coverage and communication effectiveness of the third control information.
  • the first device does not need to individually multicast and send the third control information to at least one terminal device, which can effectively save signaling overhead, save communication resources, and improve the efficiency of the communication system.
  • the CSI-RS is borne on a first frequency domain resource
  • the multicast data is borne on a second frequency domain resource, where the second frequency domain resource is the same as the first frequency domain resource, or the second frequency domain resource
  • the resources are a subset of the first frequency domain resources.
  • the first device may perform multicast channel measurement on the multicast channel bandwidth by sending CSI-RS and receiving at least one CSI report, and sending multicast data may occupy the measured part of the multicast channel Or the entire bandwidth can obtain frequency domain diversity gain and improve the efficiency of multicast data transmission, thereby improving the data transmission performance of the communication system.
  • the first device is a network device, or the first device is a terminal device in the first multicast group.
  • the solution when the first device is a network device, the solution is applicable to downlink multicast channel measurement and downlink multicast data transmission; when the first device is a terminal device on the sending side in the first multicast group, This solution can also be applied to the multicast channel measurement of the side link and the transmission of the side multicast data.
  • the technical solution is more general and flexible, and improves the data transmission efficiency of the multicast communication, thereby improving the data transmission performance of the communication system.
  • the first device sends a piece of first configuration information to at least one terminal device, or the first device sends corresponding first configuration information to each of the at least one terminal device, and each terminal
  • the first configuration information corresponding to the devices is the same.
  • the first device may send configuration information of the CSI report corresponding to the first multicast group to at least one terminal device through a signaling, thereby effectively saving communication signaling. If the first device sends the same CSI report configuration information to each of the at least one terminal device before forming a group through the first multicast, thereby improving the flexibility and practicability of CSI report resource configuration.
  • a method for acquiring multicast channel state information is provided. This method can be executed by the first terminal device, or can be executed by a chip applied to the first terminal device. In the following, only the first terminal device is the subject of execution. as an example.
  • the method includes: the first terminal device receives first configuration information from the first device, the first configuration information is used to indicate the time-frequency resource of channel state information CSI report; the first terminal device receives the channel state information reference from the first device Signal CSI-RS; the first terminal device sends a first CSI report to the first device according to the CSI-RS, the first terminal device belongs to the first multicast group, and the time-frequency resource carrying the first CSI report also carries information from the first multicast group At least one CSI report of at least one terminal device in the group, and the first CSI belongs to the at least one CSI report, and the CSI report is used for the first device to determine multicast channel state information; the first terminal device receives the information from the first device multicast data.
  • the first configuration information includes a first time limit
  • the first configuration information is used to instruct the first terminal device to send the first CSI report within the first time limit.
  • the first configuration information is used to indicate a period and a starting time point of the time-frequency resource for the first terminal device to send the first CSI report.
  • the method further includes: the first terminal device receives a MAC CE from the control unit of the media access control layer of the first device; and the terminal device sends the first CSI report to the first device according to the MAC CE.
  • the method further includes: the first terminal device receiving second control information from the first device; and the terminal device sending the first CSI report to the first device according to the second control information.
  • the method further includes: the first terminal device receives third control information from the first device, the third control information is used to indicate the time-frequency resource of the multicast data, wherein the third control information further includes The group identifier of the first multicast group, and the third control information are sent by the first device according to the physical layer multicast beamforming or the precoding matrix.
  • the first CSI-RS is carried on a first frequency domain resource
  • the multicast data is carried on a second frequency domain resource, where the second frequency domain resource is the same as the first frequency domain resource, or, the second frequency domain resource is The frequency domain resource is a subset of the first frequency domain resource.
  • the first device is a network device, or the first device is a terminal device in the first multicast group.
  • a communication device which includes a sending module, a receiving module, and a processing module, wherein the sending module is configured to send channel sounding reference signal SRS configuration information to at least one terminal device in the first multicast group, and the SRS
  • the configuration information indicates the first time-frequency resource for sending SRS, the sequence of SRS and the antenna port for sending SRS;
  • the receiving module is used to receive at least one SRS from at least one terminal device on the first time-frequency resource, and based on At least one SRS determines multicast channel state information, wherein the time-frequency resources carrying at least one SRS are the same, and the sequence of at least one SRS is the same;
  • the processing module is used to determine the physical layer multicast beamforming or pre-set according to the multicast channel state information Coding matrix;
  • the sending module is further configured to send multicast data to at least one terminal device according to the physical layer multicast beamforming or precoding matrix.
  • At least one SRS is transmitted through the same antenna port.
  • the receiving module is further configured to receive at least one antenna port indication information from at least one terminal device, where the antenna port indication information is used to indicate the number of antenna ports of the corresponding terminal device, or the antenna port index of the corresponding terminal device A set; the processing module is further configured to determine an antenna port for sending the SRS according to at least one antenna port indication information.
  • the sending module is further configured to send first control information to at least one terminal device according to the physical layer multicast beamforming or precoding matrix, where the first control information is used to indicate the time-frequency resource of the multicast data, wherein, the first control information further includes a group identifier of the first multicast group.
  • the multicast data is carried on the second time-frequency resource, where the second time-frequency resource is the same as the frequency domain resource of the first time-frequency resource, or the frequency domain resource of the second time-frequency resource is the same as the frequency domain resource of the first time-frequency resource.
  • a subset of frequency domain resources of a time-frequency resource is carried on the second time-frequency resource, where the second time-frequency resource is the same as the frequency domain resource of the first time-frequency resource, or the frequency domain resource of the second time-frequency resource is the same as the frequency domain resource of the first time-frequency resource.
  • the communication device is a network device, or the communication device is a terminal device in the first multicast group. It may also be a chip applied to a network device or a terminal, or other combined devices having the functions of the above-mentioned network device or terminal device.
  • the receiving module can be a receiver, and can include an antenna and a radio frequency circuit, etc.
  • the processing module can be a processor
  • the sending module can be The transmitter may include an antenna and a radio frequency circuit, etc., wherein the receiver and the transmitter may be an integrated transceiver.
  • the receiving module may be a radio frequency unit
  • the processing module may be a processor
  • the sending module may be a radio frequency unit.
  • the receiving module may be an input interface of the chip system
  • the processing module may be a processor of the chip system, for example: a central processing unit (central processing unit, CPU), sending
  • the module may be an output interface of the chip system.
  • the chip system can be a system on chip (system on chip, SOC), or a baseband chip, etc., where the baseband chip can include a processor, a channel encoder, a digital signal processor, a modem, and an interface module.
  • the sending module is further configured to send a piece of SRS configuration information to at least one terminal device, or the sending module is further configured to send corresponding SRS configuration information to each of the at least one terminal device, each The SRS configuration information corresponding to each terminal device is the same.
  • a communication device includes a receiving module and a sending module, wherein the receiving module is configured to receive channel sounding reference signal SRS configuration information from the first device, and the SRS configuration information indicates the first device used to send the SRS.
  • the receiving module is configured to receive channel sounding reference signal SRS configuration information from the first device, and the SRS configuration information indicates the first device used to send the SRS.
  • the sending module is used to send the SRS to the first device on the first time-frequency resource, and the SRS is used by the first device to determine the first multicast according to at least one SRS
  • the multicast channel status information of the group; the receiving module is also used to receive the multicast data from the first device.
  • the SRS is sent through a preset antenna port, or the SRS is sent through an antenna port indicated in the SRS configuration information.
  • the sending module is further configured to send antenna port indication information to the first device, where the antenna port indication information is used to indicate the number of antenna ports of the communication device, or a set of antenna port indexes of the communication device;
  • the port indication information is used by the first device to determine an antenna port for sending the SRS.
  • the receiving module is further configured to receive first control information from the first device, the first control information is used to indicate the time-frequency resource of the multicast data, wherein the first control information also includes the first multicast The group identifier of the group, the first control information is sent by the first device according to the physical layer multicast beamforming or the precoding matrix.
  • the multicast data is carried on the second time-frequency resource, where the second time-frequency resource is the same as the frequency domain resource of the first time-frequency resource, or the frequency domain resource of the second time-frequency resource is the same as the frequency domain resource of the first time-frequency resource.
  • a subset of frequency domain resources of a time-frequency resource is carried on the second time-frequency resource, where the second time-frequency resource is the same as the frequency domain resource of the first time-frequency resource, or the frequency domain resource of the second time-frequency resource is the same as the frequency domain resource of the first time-frequency resource.
  • the first device is a network device, or the first device is a terminal device in the first multicast group. It may also be a chip applied to a network device or a terminal, or other combined devices having the functions of the above-mentioned network device or terminal device.
  • the receiving module can be a receiver, and can include an antenna and a radio frequency circuit, etc.
  • the processing module can be a processor
  • the sending module can be The transmitter may include an antenna and a radio frequency circuit, etc., wherein the receiver and the transmitter may be an integrated transceiver.
  • the receiving module may be a radio frequency unit
  • the processing module may be a processor
  • the sending module may be a radio frequency unit.
  • the receiving module may be an input interface of the chip system
  • the processing module may be a processor of the chip system, for example: a central processing unit (central processing unit, CPU), sending
  • the module may be an output interface of the chip system.
  • the chip system can be a system on chip (system on chip, SOC), or a baseband chip, etc., where the baseband chip can include a processor, a channel encoder, a digital signal processor, a modem, and an interface module.
  • a communication device in a seventh aspect, includes a sending module, a receiving module, and a processing module, wherein the sending module is configured to send at least one piece of first configuration information to at least one terminal device in the first multicast group, and the first The configuration information is used to indicate the time-frequency resource of the channel state information CSI report; the sending module is also used to send the channel state information reference signal CSI-RS to at least one terminal device; the receiving module is used to receive at least one CSI report from at least one terminal device The processing module is used to determine the physical layer multicast beamforming or precoding matrix according to at least one CSI report; the sending module is also used to send multicast data to at least one terminal device according to the physical layer multicast beamforming or precoding matrix.
  • the first configuration information includes a first time limit
  • the first configuration information is used to instruct at least one terminal device to send a CSI report within the first time limit.
  • the first configuration information is used to indicate a period and a starting time point of the time-frequency resource reported by the channel state information (CSI).
  • CSI channel state information
  • the sending module is further configured to send a control element MAC CE of the medium access control layer to at least one terminal device, and is used to instruct at least one terminal device to send a CSI report to the communication device.
  • the sending module is further configured to send second control information to at least one terminal device, for instructing at least one terminal device to send a CSI report to the communication apparatus.
  • the sending module is further configured to send third control information to at least one terminal device according to the physical layer multicast beamforming or precoding matrix, where the third control information is used to indicate the time-frequency resource of the multicast data, wherein, the third control information also includes the group identifier of the first multicast group.
  • the CSI-RS is borne on a first frequency domain resource
  • the multicast data is borne on a second frequency domain resource, where the second frequency domain resource is the same as the first frequency domain resource, or the second frequency domain resource
  • the resources are a subset of the first frequency domain resources.
  • the communication device is a network device, or the communication device is a terminal device in the first multicast group.
  • the sending module is configured to send a piece of first configuration information to at least one terminal device, or the sending module is configured to send corresponding first configuration information to each of the at least one terminal device, each The first configuration information corresponding to each terminal device is the same.
  • a communication device which includes a receiving module, a processing module, and a sending module, wherein the receiving module is used to receive first configuration information from a first device, and the first configuration information is used to indicate channel state information The time-frequency resource of the CSI report; the receiving module is also used to receive the channel state information reference signal CSI-RS from the first device; the processing module is used to send a CSI report to the first device according to the CSI-RS, and the CSI report is used for the first device Determine the multicast channel state information of the first multicast group according to at least one CSI report; the receiving module is also used to receive multicast data from the first device.
  • the receiving module is used to receive first configuration information from a first device, and the first configuration information is used to indicate channel state information The time-frequency resource of the CSI report; the receiving module is also used to receive the channel state information reference signal CSI-RS from the first device; the processing module is used to send a CSI report to the first device according to the CSI-RS, and the CSI report is used
  • the first configuration information includes a first time limit
  • the first configuration information is used to instruct the communication device to send the CSI report within the first time limit.
  • the first configuration information is used to indicate the period and the starting time point of the time-frequency resource for sending the CSI report by the communication device.
  • the receiving module is further configured to receive a control unit MAC CE from the media access control layer of the first device; the sending module is further configured to send a CSI report to the first device according to the MAC CE.
  • the receiving module is further configured to receive second control information from the first device; the sending module is further configured to send the second control information to the first device a CSI report.
  • the receiving module is further configured to receive third control information from the first device, the third control information is used to indicate the time-frequency resource of the multicast data, wherein the third control information also includes the first multicast The group identifier of the group, and the third control information is sent by the first device according to the physical layer multicast beamforming or the precoding matrix.
  • the CSI-RS is borne on a first frequency domain resource
  • the multicast data is borne on a second frequency domain resource, where the second frequency domain resource is the same as the first frequency domain resource, or the second frequency domain resource
  • the resources are a subset of the first frequency domain resources.
  • the first device is a network device, or the first device is a terminal device in the first multicast group.
  • a communication device which includes a processor and a communication interface; the communication interface is used to communicate with modules other than the communication device, and the processor is used to run computer programs or instructions to realize The method as described in any one of the above first aspects, or to implement the method as described in any one of the above third aspects.
  • a communication device which includes: a processor and a communication interface; the communication interface is used to communicate with modules other than the communication device, and the processor is used to run computer programs or instructions to Implement the method as described in any one of the above-mentioned second aspects, or, to realize the method as described in any one of the above-mentioned fourth aspects.
  • a computer-readable storage medium wherein the computer-readable storage medium includes computer program instructions, and when the computer program instructions are run on a communication device, the communication device executes The method according to any one of the above first aspect, or, the communication device executes the method according to any one of the above third aspect.
  • a computer-readable storage medium characterized in that the computer-readable storage medium includes a computer program, and when the computer program is run on a computer, the computer executes the above-mentioned second The method according to any one of the above aspects, or, the computer executes the method according to any one of the above fourth aspects.
  • a computer program product is provided.
  • the communication device executes the method described in any one of the first aspect or the third aspect.
  • a computer program product is provided.
  • the communication device executes the method described in any one of the above-mentioned second aspect or the fourth aspect.
  • a fifteenth aspect provides a communication system, the communication system includes the communication device as described in the fifth aspect, and the communication device as described in the sixth claim.
  • a sixteenth aspect provides a communication system, the communication system comprising the communication device as described in the seventh aspect and the communication device as described in the eighth aspect.
  • any communication device, computer-readable storage medium, computer program product, and communication system provided above can be implemented by the corresponding method provided above, and therefore, the beneficial effects it can achieve can be achieved by With reference to the beneficial effects in the corresponding method provided above, details will not be repeated here.
  • FIG. 1 is a system architecture diagram of a communication system provided by an embodiment of the present application
  • FIG. 2 is a system architecture diagram of a communication device provided in an embodiment of the present application.
  • Fig. 3-Fig. 7 are schematic flow diagrams 1 to 5 of a method for obtaining multicast channel state information provided by the embodiment of the present application;
  • FIG. 8 is a schematic structural diagram of a communication device provided by an embodiment of the present application.
  • FIG. 9 is a schematic structural diagram of another communication device provided by an embodiment of the present application.
  • the technical solutions provided in the embodiments of the present application can be used in any communication system supporting sidelink communication, and the communication system can be a 3rd generation partnership project (3rd generation partnership project, 3GPP) communication system, for example, a long-term evolution (long term term evolution (LTE) system, and can be used for the fifth generation (5th generation, 5G) mobile communication system, new radio (new radio, NR) system, vehicle-to-everything (V2X) system and other
  • the next generation communication system may also be a non-3GPP communication system without limitation.
  • FIG. 1 uses FIG. 1 as an example to describe the method provided in the embodiment of the present application.
  • FIG. 1 shows a schematic diagram of an implementation environment of a communication system provided by an embodiment of the present application.
  • a communication system which may include: at least two terminal devices, the at least two terminal devices are in a multicast group, for example, the first multicast The group may include UE1 and UE2.
  • the communication system may further include at least one network device, and the network device may send multicast data to at least two terminal devices.
  • the communication system may also include a terminal device, and the terminal device may also send multicast data to at least two terminal devices UE1 and UE2.
  • the communication system may also include a vehicle UE3.
  • the Uu port can be used for communication between the terminal device and the network device
  • the PC5 port can be used for the SL communication between the terminal device and the terminal device.
  • wireless communication may also be referred to as “communication” for short
  • communication may also be described as "data transmission", “information transmission” or “transmission”.
  • the data communication link that the terminal equipment transmits to the network equipment is called an uplink (Uplink, UL), and the data communication link that the network equipment transmits to the terminal equipment is called a downlink (Downlink, DL).
  • the device can send multicast data to at least two terminal devices UE1 and UE2 through the Uu interface.
  • the terminal equipment UE3 can send multicast data to at least two terminal equipment UE1 and UE2 through the PC5 port, wherein the terminal equipment UE3 can be used as the terminal equipment of the sending end in the multicast group, and the terminal equipment UE1 and UE2 can be used as the terminal equipment in the multicast group. terminal equipment at the receiving end.
  • the source end when UE1 and UE2 send the same service request to the same source end (such as a network device, or a terminal device such as UE3), the source end sends the service data to the physical layer of the source end according to the service request, and the source end Send the same service data to UE1 and UE2 through the physical layer.
  • the same service data can be called multicast data of the physical layer.
  • a network device may be any device with a wireless transceiver function. Including but not limited to: evolved base station (NodeB or eNB or e-NodeB, evolutional Node B) in the long-term evolution (Long Term Evolution, LTE) system, base station (gNodeB or gNB) or transmission receiving point in NR /transmission reception point, TRP), 3GPP subsequent evolution base station, access node in WiFi system, wireless relay node, wireless backhaul node, etc.
  • the base station can be: a macro base station, a micro base station, a pico base station, a small station, a relay station, or a balloon station, etc.
  • Multiple base stations may support the aforementioned networks of the same technology, or may support the aforementioned networks of different technologies.
  • a base station may contain one or more co-sited or non-co-sited TRPs.
  • the network device may also be a wireless controller, a centralized unit (centralized unit, CU), and/or a distributed unit (distributed unit, DU) in a cloud radio access network (cloud radio access network, CRAN) scenario.
  • the network device can also be a server, a wearable device, or a vehicle-mounted device, etc.
  • a network device is used as an example for description.
  • the multiple network devices may be base stations of the same type, or base stations of different types.
  • the base station can communicate with the terminal equipment, and can also communicate with the terminal equipment through the relay station.
  • a terminal device can communicate with multiple base stations of different technologies. For example, a terminal device can communicate with a base station supporting an LTE network, or a base station supporting a 5G network, and can also support dual connections with a base station of an LTE network and a base station of a 5G network .
  • Terminal equipment is a device with wireless transceiver function, which can be deployed on land, including indoor or outdoor, handheld, wearable or vehicle-mounted; it can also be deployed on water (such as ships, etc.); it can also be deployed in the air (such as aircraft, balloons and satellites, etc.).
  • the terminal device may be a mobile phone, a tablet computer (Pad), a computer with a wireless transceiver function, a virtual reality (virtual reality, VR) terminal device, an augmented reality (augmented reality, AR) terminal device, an industrial control ( Wireless terminals in industrial control, vehicle-mounted terminal equipment, wireless terminals in self driving, wireless terminals in remote medical, wireless terminals in smart grid, transportation security Safety), wireless terminals in smart city, wireless terminals in smart home, wearable terminal devices, etc.
  • the embodiments of the present application do not limit the application scenarios.
  • Terminal equipment can sometimes be called user equipment UE, access terminal equipment, vehicle-mounted terminal, industrial control terminal, UE unit, UE station, mobile station, mobile station, remote station, remote terminal equipment, mobile equipment, UE terminal equipment, terminal device, wireless communication device, UE proxy or UE device, etc. Terminal equipment can also be fixed or mobile.
  • FIG. 1 is only an exemplary drawing, and the number of devices included in FIG. 1 is not limited, and besides the devices shown in FIG. 1 , the communication architecture may further include other devices.
  • the names of each device in FIG. 1 are not limited, and besides the names shown in FIG. 1 , each device can be named by other names without limitation.
  • each network element shown in FIG. 1 may adopt the composition structure shown in FIG. 2 or include the components shown in FIG. 2 .
  • Fig. 2 is a schematic structural diagram of a communication device 200 provided by the embodiment of the present application.
  • the communication device 200 can be a terminal device or a chip in the terminal device Or a system on a chip.
  • the communication device 200 may be a network device or a chip or a system on a chip in the network device.
  • the communication device 200 may include a processor 201 , a communication line 202 and a communication interface 203 . Further, the communication device 200 may further include a memory 204 . Wherein, the processor 201 , the memory 204 and the communication interface 203 may be connected through a communication line 202 .
  • the processor 201 can be a central processing unit (Central Processing Unit, CPU), a general-purpose processor, a network processor (Network Processor, NP), a digital signal processor (Digital Signal Processing, DSP), a microprocessor, a microcontroller , programmable logic devices, or any combination of them.
  • the processor 201 may also be other devices with processing functions, such as circuits, devices, or software modules.
  • the communication line 202 is used to transmit information between the components included in the communication device 200 .
  • the communication interface 203 is used for communicating with other devices or other communication networks.
  • the other communication network may be Ethernet, radio access network (Radio Access Network, RAN), wireless local area network (Wireless Local Area Networks, WLAN), etc.
  • the communication interface 203 may be an interface circuit, a pin, a radio frequency module, a transceiver or any device capable of realizing communication.
  • the memory 204 is used for storing instructions.
  • the instruction may be a computer program.
  • the memory 204 can be a read-only memory (Read-only Memory, ROM) or other types of static storage devices that can store static information and/or instructions, and can also be a random access memory (Random Access Memory, RAM) or can store Other types of dynamic storage devices that store information and/or instructions can also be Electrically Erasable Programmable read-only Memory (EEPROM), Compact Cisc read-only Memory (CD- ROM) or other optical disc storage, optical disc storage, magnetic disk storage media, or other magnetic storage devices, including compact discs, laser discs, optical discs, digital versatile discs, or Blu-ray discs.
  • EEPROM Electrically Erasable Programmable read-only Memory
  • CD- ROM Compact Cisc read-only Memory
  • CD- ROM Compact Cisc read-only Memory
  • magnetic disk storage media or other magnetic storage devices, including compact discs, laser discs, optical discs, digital versatile discs, or Blu-ray discs.
  • the memory 204 may exist independently of the processor 201 or may be integrated with the processor 201 .
  • the memory 204 may be used to store instructions or program codes or some data, and the like.
  • the memory 204 may be located in the communication device 200 or outside the communication device 200, without limitation.
  • the processor 201 is configured to execute instructions stored in the memory 204, so as to implement the methods provided in the following embodiments of the present application.
  • the processor 201 may include one or more CPUs, such as CPU0 and CPU1 in FIG. 2 .
  • the communications apparatus 200 includes multiple processors, for example, in addition to the processor 201 in FIG. 2 , it may further include a processor 207 .
  • the communication apparatus 200 further includes an output device 205 and an input device 206 .
  • the input device 206 is a device such as a keyboard, a mouse, a microphone, or a joystick
  • the output device 205 is a device such as a display screen and a speaker.
  • the communication device 200 may be a wearable device, a desktop computer, a portable computer, a network server, a mobile phone, a tablet computer, a wireless terminal, an embedded device, a chip system or a device having a structure similar to that shown in FIG. 2 .
  • the composition structure shown in FIG. 2 does not constitute a limitation to the communication device.
  • the communication device may include more or less components than those shown in the illustration, or combine certain components , or different component arrangements.
  • system-on-a-chip may be composed of chips, or may include chips and other discrete devices.
  • the above-mentioned device 200 may be a system-on-a-chip, and the system-on-a-chip may at least include one or more processors and transceiver circuits, as shown in FIG. Executed in multiple processors, so that the system-on-a-chip implements the method of the present application.
  • actions, terms, etc. involved in various embodiments of the present application may refer to each other without limitation.
  • the names of messages exchanged between various devices or the names of parameters in messages are just examples, and other names may also be used in specific implementations, which are not limited.
  • each device in the following embodiments may have the components shown in FIG. 2 .
  • the actions and terms involved in the various embodiments of the present application may refer to each other without limitation.
  • the names of messages exchanged between various devices or the names of parameters in messages are just examples, and other names may also be used in specific implementations, which are not limited.
  • a data sending and receiving method provided in an embodiment of the present application.
  • the method can be applied between the first device and at least one terminal device.
  • the first device may be a network device or a terminal device.
  • the method may include:
  • the first device sends SRS configuration information to at least one terminal device in the first multicast group, where the SRS configuration information indicates a first time-frequency resource used for sending the SRS, a sequence of the SRS, and an antenna port used for sending the SRS.
  • the at least one terminal device receives the SRS configuration information from the first device.
  • the configuration information of the first device may be a group-specific SRS (Group Specific SRS) configuration information, that is, the configuration information of the SRS used to determine the state of the multicast channel, and the specific first device is the first multicast group
  • the SRS configuration information sent by at least one terminal device in the multicast group may have the same content, that is, the first device configures group-specific SRS configuration information for the terminal devices in the first multicast group, and the transmission indicated in the group-specific SRS configuration information
  • the time-frequency resources of the SRS, the SRS sequence, and the corresponding antenna ports for sending the SRS are all the same.
  • the multicast channel described in this application can be used for a sending device to transmit multicast data to at least one receiving device in the same multicast group. That is to say, the physical layer channel through which the sending side device sends multicast specific data to at least one receiving side device may be referred to as a multicast channel.
  • the sending side device scrambles the multicast data with the multicast identifier and sends the multicast data on the multicast channel
  • the terminal devices in the multicast group can receive the multicast data on the same time-frequency resource, and communicate with each other There is no interference between.
  • the at least one terminal device in the multicast group is configured to send at least one SRS to the sending device on the same time-frequency resource
  • the at least one SRS can be regarded as an integrated SRS on the multicast channel by the sending device
  • the sending side device determines the channel state of the multicast channel according to the integrated SRS.
  • the SRS configuration information in the embodiment of the present application may specifically be the configuration information corresponding to the group-specific SRS, which is used to instruct at least one terminal device in the multicast group to send the configuration information of the SRS.
  • the group-specific SRS configuration information may include time domain configuration parameters, frequency domain configuration parameters, port configuration parameters, and SRS sequence configuration parameters.
  • the time-domain configuration parameters and frequency-domain configuration parameters included in the SRS configuration information can be specifically used to indicate the first time-frequency resource, that is, it means that the group-specific SRS sent by at least one terminal device in the first multicast group can be carried on the first time-frequency resource.
  • the SRS configuration information may also include an antenna port for sending the SRS, which means that at least one terminal device in the first multicast group can send the group-specific SRS through the antenna port indicated in the SRS configuration information.
  • the SRS configuration information may also include a sequence for instructing at least one terminal device to send the SRS.
  • the SRS configuration information may include an initial sequence, which is used to instruct at least one terminal device in the corresponding first multicast group to generate a sequence at a time-frequency resource position for sending a reference signal. Since the first device configures the same initial sequence for at least one terminal device in the first multicast group, in the subsequent step 302, the sequence of the SRS sent by at least one terminal device in the first multicast group is the same of.
  • the base station or other network equipment may configure a corresponding wireless network temporary identifier (RNTI Radio Network Tempory) for each terminal device of the above-mentioned first multicast group Identity, RNTI), the RNTI is unique, and is used to identify the terminal device in the communication system.
  • RNTI wireless network temporary identifier
  • the base station or other network equipment may configure a corresponding group identifier for each terminal device of the first multicast group, so as to identify the first multicast group in the communication system.
  • UE1 corresponds to Group1
  • UE2 also corresponds to Group1.
  • the group identifier may specifically be a group RNTI (Group RNTI), that is, the RNTI is used as a distinction between different multicast groups.
  • Group RNTI can be specifically represented by X bits. This is not specifically limited in the embodiments of the present application.
  • the first device may send one piece of SRS configuration information to at least one terminal device.
  • the SRS configuration information may be carried in a radio resource control (Radio Resource Control, RRC) message, that is, the network device may add group-specific SRS configuration information in the RRC message indicates the domain.
  • RRC Radio Resource Control
  • the network device may send the RRC message to at least one terminal device through a downlink multicast channel, which is used to indicate the SRS configuration information corresponding to the first multicast group.
  • the SRS configuration information may be carried on the PC5 In the RRC message. That is, the sending UE can add the indication field of the group-specific SRS configuration information in the PC5 RRC message.
  • the sending UE may send the PC5 RRC message to at least one terminal device through a sidelink multicast channel, to indicate the SRS configuration information corresponding to the first multicast group.
  • the first device can send group-specific SRS configuration information corresponding to the first multicast group to at least one terminal device through a single signaling, so that communication signaling can be effectively saved.
  • the first device may respectively send corresponding SRS configuration information to each of the at least one terminal device.
  • the network device may respectively send a corresponding RRC message to each of the at least one terminal device.
  • the network device sends RRC1 to UE1, and the RRC1 includes SRS configuration information; the network device sends RRC2 to UE2, and the RRC2 includes SRS configuration information.
  • the SRS configuration information corresponding to each terminal device such as UE1 and UE2 is the same.
  • the sending UE may respectively send at least one terminal device Each end device in the device sends a corresponding PC5 RRC message.
  • the sending UE sends PC5 RRC1 to the receiving UE1, and the PC5 RRC1 includes SRS configuration information; the sending UE sends PC5 RRC2 to the receiving UE2, and the PC5 RRC2 includes SRS configuration information.
  • the SRS configuration information corresponding to each receiving terminal device is the same.
  • the first device may send group-specific SRS configuration information corresponding to the first multicast group to N terminal devices through N signaling, where N may be greater than A positive integer of 1.
  • Each terminal device in the first multicast group sends an SRS to the first device on the first time-frequency resource.
  • the at least one terminal device in the first multicast group After at least one terminal device in the first multicast group successfully receives the group-specific SRS configuration information from the first device, the at least one terminal device can use the same time-frequency resource (the first time-frequency resource) according to the SRS configuration information ) to send an SRS to the first device.
  • the first device receives at least one SRS from at least one terminal device.
  • At least one terminal device may send an SRS to the first device on the first time-frequency resource indicated in the SRS configuration information.
  • the port through which at least one terminal device transmits the SRS is the same, that is, the number of antenna ports through which the at least one terminal device transmits the SRS to the first device and the corresponding antenna port numbers are the same.
  • the terminal device may determine the number of antenna ports for sending SRS according to a certain threshold according to pre-agreement, or determine the number of antenna ports for sending SRS according to a parameter of a certain antenna port.
  • the threshold corresponding to the number of ports for the terminal device to send the group-specific SRS is 2, and the terminal device can send the SRS through ports port 1 and port 2.
  • the port index for the terminal device to send the group-specific SRS is nrofSRS-Ports. According to the index nrofSRS-Ports, it can be determined that the port corresponding to the index is port 1, and the terminal device can send SRS through this port 1.
  • the terminal device may report antenna port indication information to the first device in advance, and the antenna port indication information may be used to indicate the number of antenna ports of the corresponding terminal device, or the antenna port indication information may be used to indicate A collection of antenna port indices corresponding to terminal devices.
  • the terminal device reports the antenna port indication information to the first device, specifically before step 301, for the first device to determine the antenna port used to send the SRS according to at least one antenna port indication information reported by at least one terminal device , so as to determine the SRS configuration information.
  • UE1 and UE2 may respectively report respective antenna port indication information to the network device, where the antenna port indication information includes the number of antenna ports.
  • the number of antenna ports may be the maximum number of antenna ports that the UE1 or UE2 can support. Therefore, the network device can determine the number of antenna ports used to send the SRS in the Group Specific SRS configuration information according to the number of antenna ports reported by UE1 and UE2.
  • the number of antenna ports of the SRS in the Group Specific SRS configuration information determined by the network device may be A1 and A2
  • the number of antenna ports of the SRS may be A2.
  • UE1 and UE2 respectively report respective antenna port indication information to the network device, where the antenna port indication information includes a maximum set of antenna ports that UE1 or UE2 can support. Therefore, the network device can determine the antenna port set of the SRS in the Group Specific SRS configuration information according to the antenna port sets reported by UE1 and UE2 respectively.
  • the maximum antenna port set reported by UE1 to the network device is S1, and the antenna port set S1 may include one or more antenna ports supported by UE1; the maximum antenna port set reported by UE2 to the network device is S2, and the antenna port set S2 One or more antenna ports supported by UE2 may be included.
  • the antenna port set of the SRS in the Group Specific SRS configuration information determined by the network device is the intersection S of S1 and S2.
  • the antenna port set S may include one or more antenna ports supported by both UE1 and UE2.
  • the first device determines multicast channel state information according to at least one SRS.
  • the time-frequency resources bearing at least one SRS are the same, and the sequence of the at least one SRS is the same.
  • the first device may receive at least one SRS from at least one terminal device on the first time-frequency resource.
  • the time domain resource for at least one terminal device to send SRS there is a certain deviation between the time domain resource for at least one terminal device to send SRS and the time domain resource for the first device to receive SRS, which is ignored in the embodiment of the present application. , but it does not mean that there is no delay in actual transmission.
  • the first device may perform channel measurement and estimation based on at least one SRS according to channel mutuality, and obtain multicast channel state information between the first device and the terminal device.
  • the uplink and downlink in the communication system can be transmitted in different time domains of the same frequency domain resource, so within a relatively short time (coherence time of channel propagation), the uplink can be considered as It is the same as the channel fading experienced by the downlink transmission signal, that is, channel reciprocity.
  • the multicast channel state information in the embodiment of the present application refers to the channel state information of the multicast channel between a sending side device (which may be a network device or a terminal device) and multiple receiving side devices, and the multicast channel It is used for the sending device to transmit multicast data to multiple receiving devices.
  • the multicast channel state information is the state information of a specific multicast channel, which is different from the existing channel state information between a sending device and a receiving device.
  • the algorithm for the first device to determine the state information of the multicast channel according to at least one SRS may be implemented by referring to related technologies, which will not be described in detail in this application.
  • the first device can comprehensively perform channel measurement and estimation based on the SRS sent by multiple terminal devices. Therefore, the signal power of the SRS is higher, which is beneficial to the accuracy of the multicast channel measurement by the first device. Improve communication quality.
  • the first device determines a physical layer multicast beamforming or a precoding matrix according to the multicast channel state information.
  • the steps performed by the first device may be completed in the same step, for example, the first device may determine a physical layer multicast beamforming or a precoding matrix according to at least one SRS. Alternatively, the first device may execute it sequentially. For example, the first device first executes step 303 to obtain the multicast channel state information, and then executes step 304 to obtain the physical layer multicast beamforming or precoding matrix. This application is not limited to this.
  • beamforming technology is a signal preprocessing technology based on antenna arrays, which can also be called beamforming or spatial filtering technology, and is a signal processing technology that uses sensor arrays to send and receive signals in a directional manner.
  • the beamforming technology is applied to the data transmitting end, that is, the transmitting end can adjust the parameters of the basic unit of the transmitting antenna phase array so that the transmitting signals at certain angles can obtain constructive interference, while The transmission signals at other angles obtain destructive interference, thereby generating a directional transmission beam, which is sent to a specific user, and obtains obvious array gain.
  • a beamforming set may be defined, and the beamforming set may include multiple coefficient matrices or vectors for beamforming or spatial filtering. Specifically, different beams in the beamforming set and coefficient matrices or vectors corresponding to the beams can be distinguished through index values.
  • the precoding technology can preprocess the signal to be transmitted through the baseband to generate a precoding matrix.
  • the sender can allocate limited transmit power to data streams that can be effectively transmitted according to the number of parallel transmission streams that the channel can support, so that the transmit signal can be sent to a specific user in a more directional manner, avoiding the transmission power waste.
  • the algorithm for the first device to determine the multicast beamforming or precoding matrix according to the state information of the multicast channel may be implemented by referring to related technologies, which is not specifically limited in this application.
  • the first device sends multicast data to at least one terminal device according to physical layer multicast beamforming or a precoding matrix.
  • the multicast data may be carried on the second time-frequency resource, and the second time-frequency resource is the same as the frequency domain resource of the first time-frequency resource, or the frequency domain resource of the second time-frequency resource is A subset of frequency domain resources of the first time-frequency resource.
  • the location of the frequency domain resource for sending multicast data may be the same as that of the frequency domain resource for sending SRS.
  • the frequency domain resource for sending multicast data may be a subset of the frequency domain resource for sending SRS.
  • the first device is the network device shown in FIG. 1 , and the network device sends multicast data to UE1 and UE2 by using physical layer multicast beamforming or precoding matrix.
  • the frequency domain resource for transmitting multicast data is located in the downlink bandwidth part (Bandwidth Part, BWP) of UE1, and is also located in the downlink BWP of UE2.
  • the first device may perform multicast channel measurement on the multicast channel bandwidth by sending SRS, and sending multicast data may occupy part or all of the measured bandwidth of the multicast channel, thereby improving the bandwidth of the multicast channel.
  • the effectiveness of multicast channel heterogeneity utilization improves the efficiency of multicast data transmission, thereby improving the data transmission performance of the communication system.
  • the first device corresponds to the first multicast group and the second multicast group.
  • the first multicast group includes UE1 and UE2
  • the second multicast group includes UE3 and UE4.
  • the first device may use a physical layer multicast beam or a precoding matrix to send the first multicast data to UE1 and UE2 in the first multicast group.
  • the first device may use another physical layer multicast beam or another precoding to send the second multicast data to UE3 and UE4 in the second multicast group.
  • the implementation method of the present application may further include: the first device may send first control information to at least one terminal device, and the first control information may be used to indicate a time-frequency resource location for transmitting multicast data.
  • the sending of the first control information by the first device to at least one terminal device may occur before step 305 in the foregoing implementation manner, and is used to indicate to at least one terminal device the time-frequency resource for the first device to send multicast data. Therefore, after step 305, at least one terminal device can receive the multicast data from the first device according to the time-frequency resource position indicated by the at least one terminal device.
  • the first device may send the first control information to at least one terminal device according to physical layer multicast beamforming or a precoding matrix. That is, the first device sends the first control information to at least one terminal device by using the physical layer multicast beamforming or the precoding matrix determined in step 304 above.
  • the first device may multicast and send the first control information to at least one terminal device according to the physical layer multicast beamforming or precoding matrix, for example
  • the first control information may be SCI or DCI, which is used to notify at least one terminal device of time-frequency resources for transmitting multicast data, so that the beam coverage of the first control information and the effectiveness of communication can be improved.
  • the first device does not need to separately send the first control information to at least one terminal device, which can effectively save signaling overhead, save communication resources, and improve the efficiency of the communication system.
  • the first device may also send first control information to at least one terminal device respectively, so as to instruct the terminal device how to receive or decode the multicast data.
  • the first device may send the first control information to UE1, and in addition, the second device also sends the first control information to UE2.
  • UE1 and UE2 correspond to the same third control information.
  • the present application will respectively introduce the implementation manners of the present application in detail under different situations where the first device is a network device or the first device is a terminal device.
  • the first control information may specifically be downlink control information (Downlink Control Information, DCI).
  • DCI Downlink Control Information
  • the network device may send DCI to at least one terminal device according to physical layer multicast beamforming or a precoding matrix.
  • a network device sends DCI to UE1 and UE2 through a physical layer multicast beam.
  • the DCI transmitted by the multicast may be carried on a physical downlink control channel (Physical Downlink Control Channel, PDCCH).
  • PDCCH Physical Downlink Control Channel
  • the DCI of the multicast transmission may include the Group ID of the first multicast group.
  • the network device can indicate the group identifier in the DCI in a display manner, for example, the network device can add a group identifier indication field in the DCI, for example, use Y bits in the DCI to indicate the group identifier, where Y can be a natural number .
  • the network device may indicate the group identifier implicitly, that is, the DCI transmitted by the multicast may be scrambled with the Group RNTI. Therefore, only the receiving device corresponding to the Group RNTI can successfully decode the DCI and obtain the data therein.
  • the DCI of the multicast transmission may also include an indication field of a Modulation and Coding Scheme (MCS), indicating a multicast transmission MCS.
  • MCS Modulation and Coding Scheme
  • the network device may also send DCI to at least one terminal device respectively, for instructing the terminal device how to receive or decode the multicast data.
  • step 305 is executed, that is, the network device can send multicast data to at least one terminal device according to the physical layer multicast beamforming or precoding matrix, wherein the multicast data can be carried on a physical downlink shared channel (Physical Downlink Shared CHannel, PDSCH ).
  • PDSCH Physical Downlink Shared CHannel
  • the network device sends DCI to UE1 to instruct UE1 how to receive or decode PDSCH; in addition, the network device sends DCI to UE2 to instruct UE2 how to receive or decode PDSCH.
  • the DCI sent by the network device to at least one terminal device may also include the Group ID of the first multicast group.
  • the network device may indicate the group identifier in the DCI in the aforementioned, explicit or hidden manner, and details of the specific indication manner will not be repeated here.
  • the DCI sent by the network device to at least one terminal device may further include the MCS.
  • the network device may send downlink multicast data to at least one terminal device, such as UE1 and UE2, according to the determined physical layer multicast beam property or precoding matrix.
  • the frequency domain resource for the network device to transmit the downlink multicast data may be located in the downlink BWP of UE1 and also in the downlink BWP of UE2.
  • the frequency domain resource position of the downlink BWP for the network device to transmit the downlink multicast data is the same as the frequency domain resource position of the uplink BWP for at least one terminal device to send the SRS.
  • the frequency domain resource position of the downlink BWP for the network device to transmit the downlink multicast data is a subset of the frequency domain resources of the uplink BWP for at least one terminal device to send the SRS.
  • the first device is a sending-side device that can be used to send multicast data on a sidelink in the first multicast, and is referred to as sending UE for short.
  • sending UE for short.
  • UE3 as shown in FIG. 1 may be used.
  • the first control information may specifically be sidelink control information (Sidelink Control Information, SCI).
  • SCI Sidelink Control Information
  • the sending UE may send the SCI to at least one terminal device according to physical layer multicast beamforming or a precoding matrix.
  • UE3 which is the sending UE, may send an SCI to UE1 and UE2 through a physical layer multicast beam, so as to save energy and transmit signaling.
  • the SCI of the multicast transmission may be carried on a physical sidelink control channel (Physical Sidelink Control Channel, PSCCH).
  • PSCCH Physical Sidelink Control Channel
  • the sending UE may also send the SCI to at least one terminal device respectively, for instructing the terminal device how to receive or decode the multicast data.
  • the sending UE may send multicast data to at least one terminal device according to the physical layer multicast beamforming or precoding matrix, and the multicast data may be carried on the physical side link shared channel ( Physical Sidelink Shared CHannel, PSSCH).
  • PSSCH Physical Sidelink Shared CHannel
  • the above SCI may also include the Group ID of the first multicast group and the MCS indication.
  • the Group ID of the first multicast group may also include the Group ID of the first multicast group and the MCS indication.
  • the first device can configure group-specific SRS configuration information for multiple terminal devices, and at least one terminal device in the multicast group can send the same sequence of SRSs to the first device on the same time-frequency resource , the at least one SRS on the same time-frequency resource can be regarded as an integrated SRS for the sending side device, so as to realize the effective measurement of the multicast channel by the sending side device and obtain the channel state information of the multicast channel.
  • the first device can determine the physical layer multicast beamforming or precoding matrix according to the channel state information of the multicast channel, which is used to send multicast data to at least one terminal device in the first multicast group, which improves the physical layer group
  • the utilization rate of spectrum resources for multicast transmission can be minimized, and the waste of transmission resources in multicast services can be reduced as much as possible.
  • the embodiment of the present application also provides a data sending and receiving method, specifically, the multicast channel state information may be determined based on the feedback information of the channel state of the terminal device.
  • the method can be applied between the first device and at least one terminal device.
  • the first device may be a network device or a terminal device.
  • the method may include:
  • the first device sends at least one piece of first configuration information to at least one terminal device in the first multicast group, where the first configuration information is used to indicate time-frequency resources for CSI reporting.
  • At least one terminal device receives the first configuration information from the first device.
  • the first configuration information may further include a time-frequency resource instructing the first device to send the CSI-RS.
  • the first device before sending the first configuration information to at least one terminal device, the first device sends second configuration information to at least one terminal device, where the second configuration information is used to instruct the first device to send the time-frequency resource of the CSI-RS.
  • the first device may be configured with a group-specific CSI-RS (Group Specific CSI-RS), that is, a CSI-RS dedicated to the multicast channel. Specifically, it is a reference signal used to indicate channel state information of a multicast channel between a sending-side device (which may be a network device or a terminal device) and at least one receiving-side device. Wherein, the multicast channel may be used for the sending side device to transmit multicast data to at least one receiving side device.
  • a group-specific CSI-RS Group Specific CSI-RS
  • the second configuration information in the embodiment of the present application may specifically be the configuration information corresponding to the group-specific CSI-RS, which is used to instruct the first device to send the group-specific CSI-RS to at least one terminal device group.
  • Time-frequency resource location information of the RS may include time domain configuration parameters and frequency domain configuration parameters.
  • the base station or other network equipment may configure a corresponding RNTI for each terminal device of the above-mentioned first multicast group, which is used to uniquely identify the terminal device .
  • UE1 corresponds to RNTI1
  • UE2 corresponds to RNTI2.
  • the base station or other network equipment may configure a corresponding group identifier for each terminal device of the first multicast group, so as to identify the first multicast group in the communication system.
  • UE1 corresponds to Group1
  • UE2 also corresponds to Group1.
  • the group identifier may also be a group RNTI (Group RNTI).
  • the first device may send a piece of first configuration information, or second configuration information, to at least one terminal device.
  • the first configuration information may be carried in an RRC message, that is, the network device may add an indication field of the group-specific first configuration information in the RRC message.
  • the network device may send the RRC message to at least one terminal device through a downlink multicast channel, to instruct at least one terminal device in the first multicast group to send time-domain resource location information of the CSI report.
  • the first configuration information may be carried in In PC5 RRC message. That is, the sending UE can add the indication field of the first configuration information in the PC5 RRC message.
  • the sending UE may send the PC5 RRC message to at least one terminal device through a sidelink multicast channel, to indicate the first configuration information corresponding to the first multicast group.
  • the first device can send the time-domain resource location information of the CSI report corresponding to the first multicast group to at least one terminal device through a signaling, so that communication can be effectively saved signaling.
  • the specific implementation manner for the first device to send the second configuration information to at least one terminal device is similar to that of the first configuration information. For details, refer to the above related description, and details will not be repeated here.
  • the first device may respectively send corresponding first configuration information or second configuration information to each of the at least one terminal device.
  • the network device may respectively send a corresponding RRC message to each of the at least one terminal device.
  • the network device sends RRC1 to UE1, where the RRC1 includes SRS configuration information; the network device sends RRC2 to UE2, where the RRC2 includes first configuration information or second configuration information.
  • the first configuration information/second configuration information corresponding to each terminal device are the same.
  • the sending UE may respectively send at least one terminal device Each end device in the device sends a corresponding PC5 RRC message.
  • the sending UE sends PC5 RRC1 to the receiving UE1, and the PC5 RRC1 includes the first configuration information or the second configuration information.
  • the sending UE sends PC5 RRC2 to the receiving UE2, and the PC5 RRC2 includes, or the second configuration information.
  • the first configuration information/second configuration information corresponding to each terminal device at the receiving side such as UE1 and UE2, are the same.
  • the first device may send group-specific SRS configuration information corresponding to the first multicast group to N terminal devices through N signaling, where N may be greater than A positive integer of 1.
  • the first device respectively sends corresponding first configuration information to each of the at least one terminal device, and the first configuration information corresponding to each terminal device is the same.
  • the first configuration information may include an indication of a frequency domain resource candidate set for the terminal device to send the CSI report, and time domain constraint information for the terminal device to send the CSI report.
  • the frequency domain resource candidate set for sending the CSI report may be located at the intersection of the sending BWPs of at least one receiving-side terminal device in the first multicast.
  • the first configuration information may include constraint parameters of frequency domain resources, that is, the first configuration information is used to indicate that at least one terminal device can send CSI to the first device within the bandwidth of the frequency domain resources indicated by the first configuration information. Report.
  • the first configuration information may implicitly indicate the time domain constraint for the terminal device to send the CSI report.
  • the terminal device may send the CSI report to the first device within the duration Z according to the agreement. That is to say, the maximum value of time-domain resources for the terminal device to send the CSI report may be less than or equal to the threshold Z.
  • the first configuration information may include a first time limit, and the first configuration information is used to indicate that at least one terminal device may send a CSI report to the first device within the first time limit.
  • the first device can restrict different terminal devices in the multicast group to report CSI reports synchronously within the preset time constraint, so that the first device can determine the multicast
  • the channel state information is more accurate, which effectively improves the utilization rate of the multicast channel.
  • the first device sends a CSI-RS to at least one terminal device.
  • the first device may send the CSI-RS to at least one terminal device according to the time-frequency resource position indicated in the aforementioned second configuration information.
  • at least one terminal device receives the CSI-RS from the first device.
  • Each terminal device in the first multicast group sends a CSI report to the first device.
  • the terminal device receives the CSI-RS from the first device, obtains CSI by measuring the CSI-RS, and reports the CSI to the first device through a CSI report.
  • the at least one terminal device all performs measurement according to the same multicast CSI-RS, and feeds back a CSI report.
  • the first device receives at least one CSI report from at least one terminal device.
  • At least one terminal device at the receiving end in the first multicast group may synchronously report a CSI report to the first device on the same time-frequency resource according to the indication of the first configuration information in step 501 above.
  • the manner in which the terminal device reports the CSI report to the first device may be periodic, that is, at least one terminal device sends a CSI report to the first device every certain time.
  • the first configuration information may be used to indicate the period and start time point of the time-frequency resource for the CSI report. Therefore, at least one terminal device may send a CSI report to the first device at a certain period of time from the start time point according to the indication of the first configuration information.
  • the period of the time-frequency resource of the CSI report in the first configuration information is T, and the starting time point of sending the CSI report is t1. Then at least one terminal device may report a CSI report to the first device every T time interval at the same time starting at time t1.
  • the first device may configure the manner in which the terminal device reports the CSI report to be periodic, then the first device may include the time domain constraint that the terminal device periodically sends the CSI report in the first configuration information, That is, the sending cycle and the starting time point, so that the first device can limit that different terminal devices in the multicast group can report the CSI report synchronously at the preset starting time, and report the CSI report at the same period, so that the first device
  • the multicast channel state information that can be determined according to the channel state information reflected by multiple CSI reports is more immediate and accurate, and effectively improves the utilization rate of the multicast channel.
  • the manner in which the terminal device reports the CSI report to the first device may be semi-static, that is, after the first device configures at least one terminal device with the period and start time of the time-frequency resource for sending the CSI report Based on the starting time point, the terminal device may trigger reporting of the CSI report to the first device according to the real-time instruction of the first device.
  • the first device may send a Media Access Control layer (Media Access Control, MAC) control unit (Control Unit, CE) to at least one terminal device, to instruct at least one terminal device to send a CSI report to the first device.
  • Media Access Control Media Access Control
  • CE Control Unit
  • the network device may configure the terminal devices in the group, such as UE1 and UE2, with the same CSI sending period and the same sending time starting point through an RRC message.
  • the network device can also activate the terminal device in the group to semi-statically report the CSI report to the first device through a MAC CE.
  • the manner in which the terminal device reports the CSI report to the first device may also be aperiodic.
  • the first device may also send second control information to at least one terminal device, which is used to indicate that at least one terminal device may send a CSI report to the first device.
  • the second control information may specifically be DCI or SCI. That is, when the first device is a network device, the network device may send DCI to instruct at least one terminal device to report a CSI report; when the first device is a terminal device, the network device may send DCI to instruct at least one terminal device to report a CSI report .
  • the network device may use a multicast DCI to trigger at least one terminal device in the multicast group to report a CSI report to the first device on the same time-frequency resource.
  • the CSI report may include channel quality information (Channel Quality Information, CQI), rank indication (Rank Indication, RI), precoding indication (Precoding Matrix Indication, PMI) and layer indication (Layer Indication, LI ).
  • CQI Channel Quality Information
  • RI rank Indication
  • PMI Precoding Matrix Indication
  • LI Layer Indication
  • the first device determines a physical layer multicast beamforming or a precoding matrix according to at least one CSI report.
  • the CSI report reported by multiple terminal devices may be used to determine the channel state information of the multicast channel between the sending side device and multiple receiving side devices.
  • the first device may obtain the channel state information of the multicast channel according to the received CSI report reported by at least one terminal device, and then determine the physical layer multicast beamforming or precoding according to the obtained channel state information of the multicast channel matrix.
  • the specific algorithms involved can be implemented with reference to related technologies, which is not specifically limited in this application.
  • the first device sends multicast data to at least one terminal device according to physical layer multicast beamforming or a precoding matrix.
  • the CSI-RS sent by the first device to at least one terminal device may be carried on the first frequency domain resource, and the multicast data may be carried on the second frequency domain resource, where the second The frequency domain resource is the same as the first frequency domain resource, or the second frequency domain resource is a subset of the first frequency domain resource.
  • the location of the frequency domain resource for sending multicast data may be the same as that of the frequency domain resource for sending CSI-RS.
  • the frequency domain resource for sending multicast data is a subset of the frequency domain resource for sending CSI-RS.
  • the terminal device UE3 may send multicast data to UE1 and UE2 by using physical layer multicast beamforming or a precoding matrix.
  • the frequency domain resource for transmitting the multicast data may be located in the BWP of UE1 and also in the BWP of UE2.
  • the first device may perform multicast channel measurement on the multicast channel bandwidth by sending CSI-RS and receiving at least one CSI report, and sending multicast data may occupy the measured multicast channel bandwidth.
  • the bandwidth of the channel can obtain frequency domain diversity gain, thereby improving the effectiveness of multicast channel heterogeneity utilization, improving the efficiency of multicast data transmission, and thereby improving the data transmission performance of the communication system.
  • the implementation method of the present application may further include: the first device may send third control information to at least one terminal device, where the third control information may be used to indicate a time-frequency resource location for transmitting multicast data.
  • the sending of the third control information by the first device to at least one terminal device may occur before step 505 in the foregoing implementation manner, and is used to indicate to at least one terminal device the time-frequency resource for the first device to send multicast data. Therefore, after step 505, at least one terminal device can receive the multicast data from the first device according to the time-frequency resource position indicated by the at least one terminal device.
  • the first device may send the third control information to at least one terminal device according to physical layer multicast beamforming or a precoding matrix. That is, the first device sends the third control information to at least one terminal device by using the physical layer multicast beamforming or the precoding matrix determined in step 504 above.
  • the third control information may specifically be SCI or DCI, which is used to notify at least one terminal device of time-frequency resources for transmitting multicast data, so that the beam coverage of the third control information and the effectiveness of communication can be improved .
  • the first device does not need to individually multicast and send the third control information to at least one terminal device, which can effectively save signaling overhead, save communication resources, and improve the efficiency of the communication system.
  • the first device may also send third control information to at least one terminal device respectively, so as to instruct the terminal device how to receive or decode the multicast data.
  • the first device may send third control information to UE1, and in addition, the second device also sends third control information to UE2.
  • UE1 and UE2 correspond to the same third control information.
  • the third control information may specifically be DCI.
  • the first device is a terminal device, that is, the first device is a sending side device that can be used to send multicast data on the sidelink in the first multicast, at this time, the third control information may specifically be SCI .
  • the network device may send DCI to at least one terminal device according to physical layer multicast beamforming or a precoding matrix.
  • a network device sends DCI to UE1 and UE2 through a physical layer multicast beam.
  • the DCI transmitted by the multicast may be carried on the PDCCH.
  • step 505 may be performed, that is, the network device may send multicast data to at least one terminal device according to the physical layer multicast beamforming or the precoding matrix.
  • the multicast data may be carried on the physical downlink shared channel PDSCH.
  • the network device may also send DCI to at least one terminal device respectively, for instructing the terminal device how to receive or decode the multicast data.
  • the network device sends DCI to UE1 to instruct UE1 how to receive or decode PDSCH; in addition, the network device sends DCI to UE2 to instruct UE2 how to receive or decode PDSCH.
  • the DCI of the multicast transmission may include the Group ID of the first multicast group.
  • the DCI sent by the network device to at least one terminal device may also include the Group ID of the first multicast group. Referring to the foregoing group identifier indication manner may include explicit or implicit indication, which will not be repeated here.
  • the DCI of the multicast transmission may also include an MCS indication.
  • the DCI sent by the network device to at least one terminal device may further include the MCS.
  • the network device may send downlink multicast data to at least one terminal device, such as UE1 and UE2, according to the determined physical layer multicast beam property or precoding matrix.
  • the frequency domain resource for the network device to transmit the downlink multicast data may be located in the downlink BWP of UE1 and also in the downlink BWP of UE2.
  • the first device is a sending-side device that can be used to send multicast data on a sidelink in the first multicast, and is referred to as sending UE for short.
  • sending UE for short.
  • UE3 as shown in FIG. 1 may be used.
  • the sending UE may send the SCI to at least one terminal device according to physical layer multicast beamforming or a precoding matrix.
  • UE3 which is the sending UE, may send an SCI to UE1 and UE2 through a physical layer multicast beam, so as to save energy and transmit signaling.
  • the SCI of the multicast transmission may be carried on the PSCCH.
  • the sending UE may also send the SCI to at least one terminal device respectively, for instructing the terminal device how to receive or decode the multicast data.
  • the sending UE can send multicast data to at least one terminal device according to the physical layer multicast beamforming or precoding matrix, and the multicast data can be carried on the PSSCH.
  • the above SCI may also include the Group ID of the first multicast group and the MCS indication.
  • the Group ID of the first multicast group may also include the Group ID of the first multicast group and the MCS indication.
  • the first device can configure specific CSI report configuration information for the multicast channel, so that it can obtain the multicast between one sending side device and multiple receiving side devices according to the CSI reports fed back by different terminal devices
  • the channel state information of the channel so as to determine the physical layer multicast beam property or precoding matrix suitable for multicast transmission according to the channel state information of the multicast channel, which is used to send multicast data, which improves the efficiency of physical layer multicast transmission for spectrum resources
  • the utilization rate reduces the waste of transmission resources in the multicast service as much as possible. .
  • the application provides a communication device configured to implement the steps performed by the first device in the above implementation.
  • the communication device 800 may include: a sending module 801 , a receiving module 802 and a processing module 803 .
  • the sending module 801 may be configured to send channel sounding reference signal SRS configuration information to at least one terminal device in the first multicast group, and the SRS configuration information indicates the first time-frequency resource used for sending SRS, the sequence of SRS and the configuration information used for sending SRS. Antenna port for SRS.
  • the receiving module 802 may be configured to receive at least one SRS from at least one terminal device on a first time-frequency resource, and determine multicast channel state information based on the at least one SRS, wherein the time-frequency resources carrying the at least one SRS are the same, and at least The sequence of an SRS is the same.
  • the processing module 803 may be configured to determine a physical layer multicast beamforming or a precoding matrix according to the multicast channel state information.
  • the sending module 801 may also be configured to send multicast data to at least one terminal device according to physical layer multicast beamforming or a precoding matrix.
  • At least one SRS is transmitted through the same antenna port.
  • the receiving module 802 is further configured to receive at least one antenna port indication information from at least one terminal device, where the antenna port indication information is used to indicate the number of antenna ports of the corresponding terminal device, or the antenna port of the corresponding terminal device A collection of indices.
  • the processing module 803 is further configured to determine an antenna port used for sending the SRS according to at least one antenna port indication information.
  • the sending module 801 is further configured to send first control information to at least one terminal device according to the physical layer multicast beamforming or precoding matrix, where the first control information is used to indicate the time-frequency resource of the multicast data , wherein the first control information further includes the group identifier of the first multicast group.
  • the multicast data is carried on the second time-frequency resource, where the second time-frequency resource is the same as the frequency domain resource of the first time-frequency resource, or the frequency domain resource of the second time-frequency resource is the same as the frequency domain resource of the first time-frequency resource.
  • a subset of frequency domain resources of a time-frequency resource is carried on the second time-frequency resource, where the second time-frequency resource is the same as the frequency domain resource of the first time-frequency resource, or the frequency domain resource of the second time-frequency resource is the same as the frequency domain resource of the first time-frequency resource.
  • the communication apparatus 800 may be a network device, or the communication apparatus 800 may also be a terminal device in the first multicast group.
  • the sending module 801 may also be configured to send a piece of SRS configuration information to at least one terminal device, or the sending module 801 may also be configured to send the corresponding SRS configuration information to each of the at least one terminal device respectively.
  • SRS configuration information, the SRS configuration information corresponding to each terminal device is the same.
  • the present application also provides a communication device, which is used to implement the steps performed by the terminal device in the foregoing embodiments.
  • the communication device 900 may include a receiving module 901 and a sending module 902 .
  • the receiving module 901 may be configured to receive channel sounding reference signal SRS configuration information from the first device, and the SRS configuration information indicates the first time-frequency resource used for sending SRS, the sequence of SRS and the antenna port used for sending SRS.
  • the sending module 902 may be configured to send an SRS to the first device on the first time-frequency resource, where the SRS is used by the first device to determine multicast channel state information of the first multicast group according to at least one SRS.
  • the receiving module 901 may also be configured to receive multicast data from the first device, the multicast data is sent by the first device according to the physical layer multicast beamforming or precoding matrix, the physical layer multicast beamforming or precoding matrix It is determined by the first device according to the state information of the multicast channel.
  • the SRS is sent through a preset antenna port, or the SRS is sent through an antenna port indicated in the SRS configuration information.
  • the sending module 902 may also be configured to send antenna port indication information to the first device, where the antenna port indication information is used to indicate the number of antenna ports of the communication apparatus 900, or the antenna port index of the communication apparatus 900 A collection of ; the antenna port indication information is used for the first device to determine the antenna port used to send the SRS.
  • the receiving module 901 may also be configured to receive first control information from the first device, where the first control information is used to indicate the time-frequency resource of the multicast data, where the first control information further includes the first The group identifier of the multicast group, and the first control information is sent by the first device according to the physical layer multicast beamforming or precoding matrix.
  • the multicast data is carried on the second time-frequency resource, where the second time-frequency resource is the same as the frequency domain resource of the first time-frequency resource, or the frequency domain resource of the second time-frequency resource is the same as the frequency domain resource of the first time-frequency resource.
  • a subset of frequency domain resources of a time-frequency resource is carried on the second time-frequency resource, where the second time-frequency resource is the same as the frequency domain resource of the first time-frequency resource, or the frequency domain resource of the second time-frequency resource is the same as the frequency domain resource of the first time-frequency resource.
  • the first device is a network device, or the first device is a terminal device in the first multicast group.
  • the application further provides a communication device, configured to implement the steps performed by the first device in the above implementation.
  • the communication device 800 may include: a sending module 801 , a receiving module 802 and a processing module 803 .
  • the sending module 801 can be configured to send at least one first configuration information to at least one terminal device in the first multicast group, and the first configuration information is used to indicate the time-frequency resource of the channel state information CSI report; the sending module 801 can also use To send a channel state information reference signal CSI-RS to at least one terminal device.
  • the receiving module 802 may be configured to receive at least one CSI report from at least one terminal device.
  • the processing module 803 may be configured to determine a physical layer multicast beamforming or a precoding matrix according to at least one CSI report.
  • the sending module 801 may also be configured to send multicast data to at least one terminal device according to physical layer multicast beamforming or a precoding matrix.
  • the first configuration information includes a first time limit
  • the first configuration information is used to instruct at least one terminal device to send a CSI report within the first time limit.
  • the first configuration information is used to indicate a period and a starting time point of the time-frequency resource reported by the channel state information (CSI).
  • CSI channel state information
  • the sending module 801 may also be configured to send a control element MAC CE of the media access control layer to at least one terminal device, for instructing at least one terminal device to send a CSI report to the communication device.
  • the sending module 801 may also be configured to send second control information to at least one terminal device, for instructing at least one terminal device to send a CSI report to the communication apparatus.
  • the sending module 801 may also be configured to send third control information to at least one terminal device according to the physical layer multicast beamforming or precoding matrix, where the third control information is used to indicate the time-frequency of the multicast data resources, wherein the third control information further includes the group identifier of the first multicast group.
  • the CSI-RS is borne on a first frequency domain resource
  • the multicast data is borne on a second frequency domain resource, where the second frequency domain resource is the same as the first frequency domain resource, or the second frequency domain resource
  • the resources are a subset of the first frequency domain resources.
  • the communication apparatus 800 may be a network device, or the communication apparatus 800 may also be a terminal device in the first multicast group.
  • the sending module 801 may be configured to send a piece of first configuration information to at least one terminal device, or the sending module 801 may be configured to send corresponding first configuration information to each of the at least one terminal device respectively.
  • the first configuration information corresponding to each terminal device is the same.
  • the present application also provides a communication device, which is used to implement the steps performed by the terminal device in the foregoing embodiments.
  • the communication device 800 may include: a sending module 801 , a receiving module 802 and a processing module 803 .
  • the receiving module 802 can be used to receive the first configuration information from the first device, the first configuration information is used to indicate the time-frequency resource of the channel state information CSI report; the receiving module 802 can also be used to receive the channel information from the first device Status Information Reference Signal CSI-RS.
  • the processing module 803 may be configured to send a CSI report to the first device according to the CSI-RS, where the CSI report is used for the first device to determine multicast channel state information of the first multicast group according to at least one CSI report.
  • the receiving module 802 may also be configured to receive multicast data from the first device, the multicast data is sent by the first device according to the physical layer multicast beamforming or precoding matrix, and the physical layer multicast beamforming or precoding matrix It is determined by the first device according to the state information of the multicast channel.
  • the first configuration information includes a first time limit
  • the first configuration information is used to instruct the communication device to send the CSI report within the first time limit.
  • the first configuration information is used to indicate the period and the starting time point of the time-frequency resource for sending the CSI report by the communication device.
  • the receiving module 802 is further configured to receive a control unit MAC CE from the media access control layer of the first device; the sending module 801 is further configured to send a CSI report to the first device according to the MAC CE.
  • the receiving module 802 is further configured to receive second control information from the first device; the sending module 801 is further configured to send the second control information to the first device a CSI report.
  • the receiving module 802 is further configured to receive third control information from the first device, the third control information is used to indicate the time-frequency resources of the multicast data, wherein the third control information also includes the first group The group identifier of the broadcast group, and the third control information is sent by the first device according to the physical layer multicast beamforming or precoding matrix.
  • the CSI-RS is borne on a first frequency domain resource
  • the multicast data is borne on a second frequency domain resource, where the second frequency domain resource is the same as the first frequency domain resource, or the second frequency domain resource
  • the resources are a subset of the first frequency domain resources.
  • the first device is a network device, or the first device is a terminal device in the first multicast group.
  • the communication device may be presented in the form of dividing various functional modules in an integrated manner.
  • a “module” here may refer to a specific circuit, a processor and memory executing one or more software or firmware programs, an integrated logic circuit, and/or other devices that can provide the above functions.
  • the communication device can take the form shown in FIG. 2 in the foregoing.
  • the function/implementation process of the processing module 803 in FIG. 8 may be implemented by calling the computer program instructions stored in the memory 203 by the processor 201 in FIG. 2 .
  • the functions/implementation process of the sending module 801 and the receiving module 802 in FIG. 8 may be implemented through the communication interface 204 in FIG. 2 .
  • the functions/implementation process of the receiving module 901 and the sending module 902 in FIG. 9 can be realized through the communication interface 204 in FIG. 2 .
  • the processor 201 in FIG. 2 can call the computer-executed instructions stored in the memory 203, so that the apparatus 200 can perform the operations performed by the first device or the terminal device in the above-mentioned various method embodiments, and implement the present application.
  • the apparatus 200 can perform the operations performed by the first device or the terminal device in the above-mentioned various method embodiments, and implement the present application.
  • the communication group device in each of the above device embodiments may completely correspond to the first device or terminal device in the method embodiment, and the corresponding steps are performed by corresponding modules or units.
  • the The communication unit may be an interface circuit for the chip to receive signals from other chips or devices.
  • the above communication unit for sending or receiving is an interface circuit of the device, used to send signals to other devices, for example, when the device is implemented in the form of a chip, the communication unit can be used to send signals to other chips or devices Interface circuit for sending signals.
  • a computer-readable storage medium including instructions, or a computer program product is also provided, and the above-mentioned instructions can be executed by the processor 201 of the communication device 200 to implement the methods of the above-mentioned embodiments. Therefore, the technical effects that can be obtained can refer to the above-mentioned method embodiments, and will not be repeated here.
  • the present application also provides a computer program product.
  • the computer program product includes instructions. When the instructions are executed, the computer can respectively perform operations performed by the first device or the terminal device corresponding to the above method.
  • the embodiment of the present application also provides a system chip.
  • the system chip includes: a processing unit and a communication unit.
  • the processing unit may be, for example, a processor, and the communication unit may be, for example, an input/output interface, a pin, or a circuit.
  • the processing unit may execute computer instructions, so that the communication device to which the chip is applied executes the operations performed by the first device or the terminal device in the method provided by the above embodiments of the present application.
  • any communication device provided in the foregoing embodiments of the present application may include the system chip.
  • the computer instructions are stored in a storage unit.
  • An embodiment of the present application further provides a communication system, and the communication system may include: any first device in the foregoing implementation manners and at least one terminal device.
  • all or part of them may be implemented by software, hardware, firmware or any combination thereof.
  • a software program When implemented using a software program, 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. 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.
  • a computer can be a general purpose computer, special purpose computer, computer network, or other programmable device.

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Abstract

The present application relates to the technical field of communications, and provides a data sending and receiving method and apparatus, for use in solving the problem of waste of multicast service transmission resources and improving spectrum utilization. The method comprises: a first device sends channel sounding reference signal (SRS) configuration information to at least one terminal device in a first multicast group, the SRS configuration information indicating a first time-frequency resource for sending an SRS, a sequence of the SRS, and an antenna port for sending the SRS; the first device receives at least one SRS from the at least one terminal device on the first time-frequency resource, and determines multicast channel state information on the basis of the at least one SRS, wherein the time-frequency resources carrying at least one SRS are the same, and the sequences of at least one SRS are the same; the first device determines a physical layer multicast beamforming or precoding matrix according to the multicast channel state information; and the first device sends multicast data to the at least one terminal device according to the physical layer multicast beamforming or precoding matrix.

Description

数据发送和接收方法及装置Data sending and receiving method and device
本申请要求于2021年07月02日提交国家知识产权局、申请号为202110753628.9、申请名称为“数据发送和接收方法及装置”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。This application claims the priority of the Chinese patent application with the application number 202110753628.9 and the application name "data transmission and reception method and device" submitted to the State Intellectual Property Office on July 02, 2021, the entire content of which is incorporated by reference in this application middle.
技术领域technical field
本申请涉及通信技术领域，尤其涉及一种数据发送和接收方法及装置。The present application relates to the technical field of communications, and in particular to a data sending and receiving method and device.
背景技术Background technique
在长期演进(long term evolved，LTE)***至新空口(new radio，NR)***中，用户设备(User Equipment，UE)与基站之间传输数据的链路称为上行链路(UE向基站发送信息的链路)或下行链路(基站向UE发送信息的链路)，UE之间传输数据的链路称为侧行链路(Sidelink，SL)。侧行链路通常可以应用于车辆到一切(vehicle to everything，V2X)场景，或者设备到设备(device to device，D2D)等直联通信场景。其中，基于不同用户设备对相同数据内容的诉求，下行链路以及侧行链路除了可以支持单播，还可以支持组播和广播。In the long term evolution (long term evolved, LTE) system to the new radio interface (new radio, NR) system, the data transmission link between the user equipment (User Equipment, UE) and the base station is called the uplink (UE transmits data to the base station Information link) or downlink (a link for a base station to send information to a UE), and a link for transmitting data between UEs is called a sidelink (Sidelink, SL). Sidelinks can usually be applied to vehicle-to-everything (V2X) scenarios, or direct-connected communication scenarios such as device-to-device (D2D). Among them, based on the requirements of different user equipments for the same data content, the downlink and sidelink can support multicast and broadcast in addition to unicast.
目前，可以利用波束赋形或者预编码技术，即通过调整发射信号的相位、信号幅度以及发射功率等产生具有指向性的波束，从而可以扩大信号覆盖范围、改善边缘吞吐量以及抑制干扰问题等，来有效提高***频谱效率，解决资源浪费的问题。基站对下行链路进行波束赋形或者预编码技术需要获取信道状态信息(Channel State Information，CSI)。At present, beamforming or precoding technology can be used to generate directional beams by adjusting the phase, signal amplitude and transmission power of the transmitted signal, so as to expand signal coverage, improve edge throughput and suppress interference problems, etc. To effectively improve the spectrum efficiency of the system and solve the problem of resource waste. The base station needs to obtain channel state information (Channel State Information, CSI) to perform beamforming or precoding technology on the downlink.
具体的，UE可以发送信道探测参考信号(Sounding Reference Signal，SRS)，基站通过测量和估计，利用信道互异性可以获得UE和基站之间的信道状态信息。此外，基站可以向UE发送信道状态信息(Channel State Information，CSI)的参考信号(Reference Signal，RS)，UE通过测量CSI-RS获得CSI，再向基站发送CSI报告，从而使得基站可以基于CSI报告获得UE和基站之间的信道状态信息。Specifically, the UE can send a channel sounding reference signal (Sounding Reference Signal, SRS), and the base station can obtain the channel state information between the UE and the base station by using the channel mutuality through measurement and estimation. In addition, the base station can send a reference signal (Reference Signal, RS) of channel state information (Channel State Information, CSI) to the UE, and the UE obtains the CSI by measuring the CSI-RS, and then sends a CSI report to the base station, so that the base station can report based on the CSI Obtain channel state information between the UE and the base station.
但是，对于电子设备的物理层而言，通过不同的时频资源传输相同的业务数据，会造成空口资源的浪费。或者，发送端设备可以通过空分复用(Space Division Multiple Access，SDMA)的方式发送相同的业务数据，但信号的发射功率分配给了不同的UE，且不同UE的发射信号之间存在相互干扰，导致信号的发射功率没有被有效利用。因此，需要研究更高效的物理层组播技术，解决组播业务中的传输资源浪费的问题。However, for the physical layer of an electronic device, transmitting the same service data through different time-frequency resources will cause waste of air interface resources. Alternatively, the sender device can send the same service data through Space Division Multiple Access (SDMA), but the transmit power of the signal is allocated to different UEs, and there is mutual interference between the transmit signals of different UEs , causing the transmission power of the signal to not be effectively utilized. Therefore, it is necessary to study a more efficient physical layer multicast technology to solve the problem of waste of transmission resources in multicast services.
发明内容Contents of the invention
本申请提供一种数据发送和接收方法及装置，可以减少组播业务中的传输资源浪费，有效提高频谱利用率。The present application provides a data sending and receiving method and device, which can reduce the waste of transmission resources in multicast services and effectively improve spectrum utilization.
第一方面，提供一种数据发送和接收方法，该方法可以由第一设备执行，也可以由应用于第一设备中的芯片执行，下文仅以执行主体为第一设备作为示例。该方法包括：第一设备向第一组播组中至少一个终端设备发送信道探测参考信号SRS配置信息， SRS配置信息指示用于发送SRS的第一时频资源、SRS的序列和用于发送SRS的天线端口；第一设备在第一时频资源上接收来自至少一个终端设备的至少一个SRS，并基于至少一个SRS确定组播信道状态信息，其中，承载至少一个SRS的时频资源相同，且至少一个SRS的序列相同；第一设备根据组播信道状态信息确定物理层组播波束赋形或者预编码矩阵；第一设备根据物理层组播波束赋形或者预编码矩阵向至少一个终端设备发送组播数据。In the first aspect, a method for sending and receiving data is provided. The method may be executed by a first device, or may be executed by a chip applied to the first device. The following only takes the first device as an example for execution. The method includes: the first device sends channel sounding reference signal SRS configuration information to at least one terminal device in the first multicast group, and the SRS configuration information indicates the first time-frequency resource used for sending the SRS, the sequence of the SRS and the configuration information used for sending the SRS. antenna port; the first device receives at least one SRS from at least one terminal device on the first time-frequency resource, and determines multicast channel state information based on the at least one SRS, wherein the time-frequency resources bearing at least one SRS are the same, and The sequence of at least one SRS is the same; the first device determines the physical layer multicast beamforming or precoding matrix according to the multicast channel state information; the first device sends to at least one terminal device according to the physical layer multicast beamforming or precoding matrix Multicast data.
上述技术方案中，对于一个发送侧设备(第一设备)和多个接收侧设备之间的组播通信场景，第一设备可以为至少一个终端设备配置SRS配置信息(例如可以是组播特定的SRS配置信息)，组播组内的至少一个终端设备可以在相同的时频资源上向第一设备发送相同序列的SRS，该相同时频资源上的至少一个SRS对发送侧设备来说可以被视为一个整合的SRS，以实现发送侧设备对组播信道的有效测量，得到组播信道的信道状态信息。从而第一设备可以根据组播信道的信道状态信息确定物理层组播波束赋形或者预编码矩阵，用于向第一组播组中的至少一个终端设备发送组播数据，提高了物理层组播传输对于频谱资源的利用率，尽可能减少了组播业务中的传输资源浪费。In the above technical solution, for a multicast communication scenario between one sending device (first device) and multiple receiving devices, the first device may configure SRS configuration information for at least one terminal device (for example, it may be multicast-specific SRS configuration information), at least one terminal device in the multicast group can send the same sequence of SRSs to the first device on the same time-frequency resource, and at least one SRS on the same time-frequency resource can be used by the sending side device. It is regarded as an integrated SRS, so as to realize the effective measurement of the multicast channel by the sending side device and obtain the channel state information of the multicast channel. Therefore, the first device can determine the physical layer multicast beamforming or precoding matrix according to the channel state information of the multicast channel, which is used to send multicast data to at least one terminal device in the first multicast group, which improves the physical layer group The utilization rate of spectrum resources for multicast transmission can be minimized, and the waste of transmission resources in multicast services can be reduced as much as possible.
在一种实施方式中，至少一个SRS是通过相同的天线端口发送的。In one embodiment, at least one SRS is transmitted through the same antenna port.
上述可能的实施方式，多个终端设备从各自相同的天线端口向第一设备发送SRS，至少一个SRS用于第一设备对第一设备和多个接收侧设备之间的组播信道测量和估计，从而相同时频资源且相同的端口发送的至少一个SRS可以提高组播信道测量的有效性，提高组播信道测量的准确性。In the above possible implementation mode, multiple terminal devices send SRSs to the first device from the same antenna ports, and at least one SRS is used by the first device to measure and estimate the multicast channel between the first device and multiple receiving side devices , so that at least one SRS sent by the same time-frequency resource and the same port can improve the effectiveness of multicast channel measurement and improve the accuracy of multicast channel measurement.
在一种实施方式中，该方法还包括：第一设备接收来自至少一个终端设备的至少一个天线端口指示信息，天线端口指示信息用于指示对应终端设备的天线端口数量，或者，对应终端设备的天线端口索引的集合；第一设备根据至少一个天线端口指示信息确定用于发送SRS的天线端口。In an embodiment, the method further includes: the first device receives at least one antenna port indication information from at least one terminal device, where the antenna port indication information is used to indicate the number of antenna ports of the corresponding terminal device, or, the corresponding terminal device's A set of antenna port indexes; the first device determines an antenna port for sending the SRS according to at least one antenna port indication information.
上述可能的实施方式，至少一个终端设备均向第一设备上报各自的天线端口指示信息，例如，终端设备各自支持的天线端口数量或者天线端口索引的集合，从而第一设备可以根据多个终端设备的天线端口指示信息确定用于发送SRS的天线端口，使得每个终端设备使用相同的天线端口发送SRS，提高了组播信道测量的精确性和灵活性。In the above possible implementation mode, at least one terminal device reports its own antenna port indication information to the first device, for example, the number of antenna ports supported by each terminal device or the set of antenna port indexes, so that the first device can The antenna port indication information of the antenna port determines the antenna port used to send the SRS, so that each terminal device uses the same antenna port to send the SRS, which improves the accuracy and flexibility of the multicast channel measurement.
在一种实施方式中，该方法还包括：第一设备根据物理层组播波束赋形或者预编码矩阵向至少一个终端设备发送第一控制信息，第一控制信息用于指示组播数据的时频资源，其中，第一控制信息还包括第一组播组的组标识。In an embodiment, the method further includes: the first device sends first control information to at least one terminal device according to the physical layer multicast beamforming or precoding matrix, and the first control information is used to indicate the timing of the multicast data. The frequency resource, wherein the first control information further includes a group identifier of the first multicast group.
上述可能的实施方式，第一设备确定物理层组播波束赋形或者预编码矩阵之后，可以根据物理层组播波束赋形或者预编码矩阵向至少一个终端设备组播发送第一控制信息，例如，第一控制信息具体可以为SCI或者DCI，用于向至少一个终端设备通知传输组播数据的时频资源，从而可以提高第一控制信息的波束覆盖以及通信的有效性。另外，第一设备无需单独向至少一个终端设备发送第一控制信息，还能有效节省信令开销，节约通信资源，提高通信***的效率。In the above possible implementation mode, after the first device determines the physical layer multicast beamforming or precoding matrix, it may multicast and send the first control information to at least one terminal device according to the physical layer multicast beamforming or precoding matrix, for example Specifically, the first control information may be SCI or DCI, which is used to notify at least one terminal device of time-frequency resources for transmitting multicast data, so that the beam coverage of the first control information and the effectiveness of communication can be improved. In addition, the first device does not need to separately send the first control information to at least one terminal device, which can effectively save signaling overhead, save communication resources, and improve the efficiency of the communication system.
在一种实施方式中，组播数据承载于第二时频资源，其中，第二时频资源与第一时频资源的频域资源相同，或者，第二时频资源的频域资源为第一时频资源的频域资 源的子集。In one embodiment, the multicast data is carried on the second time-frequency resource, where the second time-frequency resource is the same as the frequency domain resource of the first time-frequency resource, or the frequency domain resource of the second time-frequency resource is the same as the frequency domain resource of the first time-frequency resource. A subset of frequency domain resources of a time-frequency resource.
上述可能的实施方式，第一设备可以通过接收的至少一个SRS对组播信道带宽进行了组播信道测量，而发送组播数据可以占用已测量的该组播信道的部分或者全部带宽，从而提高了组播信道测量利用的有效性，提高组播数据传输的效率，从而提升通信***的数据传输性能。In the above possible implementation mode, the first device may perform multicast channel measurement on the multicast channel bandwidth through at least one received SRS, and sending multicast data may occupy part or all of the measured bandwidth of the multicast channel, thereby improving The effectiveness of multicast channel measurement and utilization is improved, the efficiency of multicast data transmission is improved, and the data transmission performance of the communication system is improved.
在一种实施方式中，第一设备为网络设备，或者第一设备为第一组播组中一个终端设备。In an implementation manner, the first device is a network device, or the first device is a terminal device in the first multicast group.
上述可能的实施方式，第一设备为网络设备时，方案适用于下行链路的组播信道测量以及下行组播数据的传输；第一设备为第一组播组中发送侧的终端设备时，该方案还可以适用于侧行链路的组播信道测量以及侧行组播数据的传输，技术方案较通用和灵活，提高组播通信的数据传输效率，从而提升通信***的数据传输性能。In the above possible implementation mode, when the first device is a network device, the solution is applicable to downlink multicast channel measurement and downlink multicast data transmission; when the first device is a terminal device on the sending side in the first multicast group, This solution can also be applied to the multicast channel measurement of the side link and the transmission of the side multicast data. The technical solution is more general and flexible, and improves the data transmission efficiency of the multicast communication, thereby improving the data transmission performance of the communication system.
在一种实施方式中，第一设备向至少一个终端设备发送一个SRS配置信息，或者，第一设备分别向至少一个终端设备中的每个终端设备发送对应的SRS配置信息，每个终端设备对应的SRS配置信息均相同。In one embodiment, the first device sends a piece of SRS configuration information to at least one terminal device, or the first device sends corresponding SRS configuration information to each of the at least one terminal device, and each terminal device corresponds to The SRS configuration information is the same.
上述可能的实施方式，在第一组播组成组之后，第一设备可以通过一条信令向至少一个终端设备发送第一组播组对应的组特定SRS配置信息，从而可以有效节省通信信令。若在第一组播组成组之前，第一设备分别向至少一个终端设备中的每个终端设备发送相同的SRS配置信息，从而提高了SRS配置信息的灵活性，以及可实现性。In the above possible implementation manner, after the first multicast group is formed, the first device may send group-specific SRS configuration information corresponding to the first multicast group to at least one terminal device through a signaling, thereby effectively saving communication signaling. If the first device sends the same SRS configuration information to each of the at least one terminal device before forming a group through the first multicast, thereby improving the flexibility and realizability of the SRS configuration information.
第二方面，提供一种组播信道状态信息的获取方法，该方法可以由第一终端设备执行，也可以由应用于第一终端设备中的芯片执行，下文仅以执行主体为第一终端设备作为示例。该方法包括：第一终端设备接收来自第一设备的信道探测参考信号SRS配置信息，SRS配置信息指示用于发送SRS的第一时频资源、SRS的序列和用于发送SRS的天线端口；第一终端设备在第一时频资源上向第一设备发送第一SRS，第一终端设备属于第一组播组，第一时频资源承载来自第一组播组中的至少一个终端设备的至少一个SRS，且第一SRS属于至少一个SRS，至少一个SRS用于所述第一设备确定组播信道状态信息；第一终端设备接收来自第一设备的组播数据。In the second aspect, a method for obtaining multicast channel state information is provided. This method can be executed by the first terminal device, or can be executed by a chip applied to the first terminal device. In the following, only the execution subject is the first terminal device. as an example. The method includes: the first terminal device receives channel sounding reference signal SRS configuration information from the first device, and the SRS configuration information indicates a first time-frequency resource for sending SRS, a sequence of SRS and an antenna port for sending SRS; A terminal device sends a first SRS to a first device on a first time-frequency resource, the first terminal device belongs to a first multicast group, and the first time-frequency resource carries at least one message from at least one terminal device in the first multicast group One SRS, and the first SRS belongs to at least one SRS, and the at least one SRS is used for the first device to determine multicast channel state information; the first terminal device receives multicast data from the first device.
在一种实施方式中，至少一个SRS是通过相同的天线天线端口发送的。In one embodiment, at least one SRS is transmitted through the same antenna port.
在一种实施方式中，该方法还包括：第一终端设备向第一设备发送天线端口指示信息，天线端口指示信息用于指示第一终端设备的天线端口数量，或者，第一终端设备的天线端口索引的集合；天线端口指示信息用于第一设备确定用于发送SRS的天线端口。In an embodiment, the method further includes: the first terminal device sends antenna port indication information to the first device, where the antenna port indication information is used to indicate the number of antenna ports of the first terminal device, or the antenna port number of the first terminal device A set of port indexes; the antenna port indication information is used by the first device to determine the antenna port used to send the SRS.
在一种实施方式中，该方法还包括：第一终端设备接收来自第一设备的第一控制信息，第一控制信息用于指示组播数据的时频资源，其中，第一控制信息还包括第一组播组的组标识，第一控制信息是第一设备根据物理层组播波束赋形或者预编码矩阵发送的。In an embodiment, the method further includes: the first terminal device receives first control information from the first device, the first control information is used to indicate the time-frequency resource of the multicast data, wherein the first control information further includes The group identifier of the first multicast group, and the first control information are sent by the first device according to a physical layer multicast beamforming or a precoding matrix.
在一种实施方式中，组播数据承载于第二时频资源，其中，第二时频资源与第一时频资源的频域资源相同，或者，第二时频资源的频域资源为第一时频资源的频域资源的子集。In one embodiment, the multicast data is carried on the second time-frequency resource, where the second time-frequency resource is the same as the frequency domain resource of the first time-frequency resource, or the frequency domain resource of the second time-frequency resource is the same as the frequency domain resource of the first time-frequency resource. A subset of frequency domain resources of a time-frequency resource.
在一种实施方式中，第一设备为网络设备，或者第一设备为第一组播组中一个终 端设备。In one embodiment, the first device is a network device, or the first device is a terminal device in the first multicast group.
第三方面，提供一种组播信道状态信息的获取方法，该方法可以由第一设备执行，也可以由应用于第一设备中的芯片执行，下文仅以执行主体为第一设备作为示例。该方法包括：第一设备向第一组播组中至少一个终端设备发送至少一个第一配置信息，第一配置信息用于指示信道状态信息CSI报告的时频资源；第一设备向至少一个终端设备发送信道状态信息参考信号CSI-RS；第一设备接收来自至少一个终端设备的至少一个CSI报告；第一设备根据至少一个CSI报告确定物理层组播波束赋形或者预编码矩阵；第一设备根据物理层组播波束赋形或者预编码矩阵向至少一个终端设备发送组播数据。In a third aspect, a method for acquiring multicast channel state information is provided. The method may be executed by the first device, or may be executed by a chip applied to the first device. The following only takes the first device as an example for execution. The method includes: the first device sends at least one first configuration information to at least one terminal device in the first multicast group, the first configuration information is used to indicate the time-frequency resource of channel state information CSI report; the first device sends at least one terminal device The device sends a channel state information reference signal CSI-RS; the first device receives at least one CSI report from at least one terminal device; the first device determines a physical layer multicast beamforming or precoding matrix according to the at least one CSI report; the first device The multicast data is sent to at least one terminal device according to the physical layer multicast beamforming or the precoding matrix.
上述技术方案中，对于一个发送侧设备(第一设备)和多个接收侧设备之间的组播信道，第一设备可以通过为至少一个终端设备配置第一配置信息，即组播信道特定的CSI报告的配置信息，从而第一设备可以根据不同终端设备在该第一配置信息指示的时频资源上反馈的CSI报告，确定第一设备和至少一个终端设备之间的组播信道的信道状态信息。第一设备可以根据组播信道的信道状态信息确定适合组播传输的物理层组播波束赋性或者预编码矩阵，用于发送组播数据，提高了物理层组播传输对于频谱资源的利用率，尽可能减少了组播业务中的传输资源浪费。In the above technical solution, for a multicast channel between one sending device (first device) and multiple receiving devices, the first device can configure the first configuration information for at least one terminal device, that is, the multicast channel-specific CSI report configuration information, so that the first device can determine the channel state of the multicast channel between the first device and at least one terminal device according to the CSI reports fed back by different terminal devices on the time-frequency resources indicated by the first configuration information information. The first device can determine a physical layer multicast beam attribute or a precoding matrix suitable for multicast transmission according to the channel state information of the multicast channel, and use it to send multicast data, thereby improving the utilization rate of spectrum resources for physical layer multicast transmission, The waste of transmission resources in the multicast service is reduced as much as possible.
在一种实施方式中，第一配置信息包括第一时限，第一配置信息用于指示至少一个终端设备在第一时限内发送CSI报告。In an implementation manner, the first configuration information includes a first time limit, and the first configuration information is used to instruct at least one terminal device to send a CSI report within the first time limit.
上述可能的实施方式，第一配置信息中可以包括终端设备发送CSI包括的时域约束，即第一时限，从而第一设备可以限制组播组中不同终端设备都在预设的时间约束内，上报CSI报告，在第一时限内可以认为信道状态变化可以忽略，使得第一设备可以根据多个CSI报告反映的信道状态信息确定组播信道状态信息能更加准确，有效提高组播信道的利用率。In the above possible implementation mode, the first configuration information may include the time domain constraint that the terminal device sends CSI, that is, the first time limit, so that the first device can restrict different terminal devices in the multicast group to be within the preset time constraint, Reporting the CSI report, it can be considered that the channel state change can be ignored within the first time limit, so that the first device can determine the multicast channel state information according to the channel state information reflected by multiple CSI reports. The multicast channel state information can be more accurate, and the utilization rate of the multicast channel can be effectively improved .
在一种实施方式中，第一配置信息用于指示信道状态信息CSI报告的时频资源的周期和起始时间点。In an implementation manner, the first configuration information is used to indicate a period and a starting time point of the time-frequency resource reported by the channel state information (CSI).
上述可能的实施方式，第一设备可以将终端设备上报CSI报告的方式配置为是周期性的，则第一设备可以通过在第一配置信息中包括终端设备周期性发送CSI报告的时域约束，即发送周期和起始时间点，从而第一设备可以限制组播组中不同终端设备都可以在预设的起始时间，同步上报CSI报告，并以相同的周期上报CSI报告，使得第一设备可以根据多个CSI报告反映的信道状态信息确定的组播信道状态信息的即时性更强，更加准确，有效提高组播信道的利用率。In the above possible implementation mode, the first device may configure the manner in which the terminal device reports the CSI report to be periodic, then the first device may include the time domain constraint that the terminal device periodically sends the CSI report in the first configuration information, That is, the sending cycle and the starting time point, so that the first device can limit that different terminal devices in the multicast group can report the CSI report synchronously at the preset starting time, and report the CSI report at the same period, so that the first device The multicast channel state information that can be determined according to the channel state information reflected by multiple CSI reports is more immediate and accurate, and effectively improves the utilization rate of the multicast channel.
在一种实施方式中，该方法还包括：第一设备向至少一个终端设备发送媒体接入控制层的控制单元MAC CE，用于指示至少一个终端设备向第一设备发送CSI报告。In an implementation manner, the method further includes: the first device sends a control element MAC CE of the media access control layer to at least one terminal device, for instructing at least one terminal device to send a CSI report to the first device.
上述可能的实施方式，第一设备可以将终端设备上报CSI报告的方式还配置为半静态的，即第一设备通过向至少一个终端设备发送MAC CE，用于指示终端设备向第一设备发送CSI报告，从而提高终端设备上报CSI报告的灵活性。In the above possible implementation mode, the first device may also configure the way the terminal device reports the CSI report as semi-static, that is, the first device sends a MAC CE to at least one terminal device to instruct the terminal device to send the CSI report to the first device. report, so as to improve the flexibility of the terminal device to report the CSI report.
在一种实施方式中，该方法还包括：第一设备向至少一个终端设备发送第二控制信息，用于指示至少一个终端设备向第一设备发送CSI报告和即时性。In an implementation manner, the method further includes: the first device sends second control information to at least one terminal device, which is used to instruct at least one terminal device to send a CSI report and immediacy to the first device.
上述可能的实施方式，终端设备上报CSI报告的方式还可以是非周期的，即第一 设备通过向至少一个终端设备发送第二控制信息，如第二控制信息具体可以是SCI或者DCI，第二控制信息可以用于指示终端设备向第一设备发送CSI报告，从而提高终端设备上报CSI报告的灵活性和即时性。In the above-mentioned possible implementation mode, the manner in which the terminal device reports the CSI report may also be aperiodic, that is, the first device sends the second control information to at least one terminal device, for example, the second control information may specifically be SCI or DCI, and the second control The information may be used to instruct the terminal device to send the CSI report to the first device, thereby improving the flexibility and immediacy of reporting the CSI report by the terminal device.
在一种实施方式中，该方法还包括：第一设备根据物理层组播波束赋形或者预编码矩阵向至少一个终端设备发送第三控制信息，第三控制信息用于指示组播数据的时频资源，其中，第三控制信息还包括第一组播组的组标识。In an embodiment, the method further includes: the first device sends third control information to at least one terminal device according to the physical layer multicast beamforming or precoding matrix, and the third control information is used to indicate the timing of the multicast data. frequency resources, wherein the third control information further includes a group identifier of the first multicast group.
上述可能的实施方式，第一设备确定物理层组播波束赋形或者预编码矩阵之后，可以根据物理层组播波束赋形或者预编码矩阵向至少一个终端设备发送第三控制信息，如第三控制信息具体可以为SCI或者DCI，第三控制信息可以用于向至少一个终端设备通知传输组播数据的时频资源，从而可以提高第三控制信息的波束覆盖以及通信的有效性。另外，第一设备无需单独向至少一个终端设备组播发送第三控制信息，还能有效节省信令开销，节约通信资源，提高通信***的效率。In the above possible implementation mode, after the first device determines the physical layer multicast beamforming or precoding matrix, it may send third control information to at least one terminal device according to the physical layer multicast beamforming or precoding matrix, such as the third The control information may specifically be SCI or DCI, and the third control information may be used to notify at least one terminal device of time-frequency resources for transmitting multicast data, thereby improving beam coverage and communication effectiveness of the third control information. In addition, the first device does not need to individually multicast and send the third control information to at least one terminal device, which can effectively save signaling overhead, save communication resources, and improve the efficiency of the communication system.
在一种实施方式中，CSI-RS承载于第一频域资源，组播数据承载于第二频域资源，其中，第二频域资源与第一频域资源相同，或者，第二频域资源为第一频域资源的子集。In one embodiment, the CSI-RS is borne on a first frequency domain resource, and the multicast data is borne on a second frequency domain resource, where the second frequency domain resource is the same as the first frequency domain resource, or the second frequency domain resource The resources are a subset of the first frequency domain resources.
上述可能的实施方式，第一设备可以通过发送CSI-RS和接收的至少一个CSI报告对组播信道带宽进行了组播信道测量，而发送组播数据可以占用已测量的该组播信道的部分或者全部带宽，可以获得频域分集增益，提高组播数据传输的效率，从而提升通信***的数据传输性能。In the above possible implementation mode, the first device may perform multicast channel measurement on the multicast channel bandwidth by sending CSI-RS and receiving at least one CSI report, and sending multicast data may occupy the measured part of the multicast channel Or the entire bandwidth can obtain frequency domain diversity gain and improve the efficiency of multicast data transmission, thereby improving the data transmission performance of the communication system.
在一种实施方式中，第一设备为网络设备，或者第一设备为第一组播组中一个终端设备。In an implementation manner, the first device is a network device, or the first device is a terminal device in the first multicast group.
上述可能的实施方式，第一设备为网络设备时，方案适用于下行链路的组播信道测量以及下行组播数据的传输；第一设备为第一组播组中发送侧的终端设备时，该方案还可以适用于侧行链路的组播信道测量以及侧行组播数据的传输，技术方案较通用和灵活，提高组播通信的数据传输效率，从而提升通信***的数据传输性能。In the above possible implementation mode, when the first device is a network device, the solution is applicable to downlink multicast channel measurement and downlink multicast data transmission; when the first device is a terminal device on the sending side in the first multicast group, This solution can also be applied to the multicast channel measurement of the side link and the transmission of the side multicast data. The technical solution is more general and flexible, and improves the data transmission efficiency of the multicast communication, thereby improving the data transmission performance of the communication system.
在一种实施方式中，第一设备向至少一个终端设备发送一个第一配置信息，或者，第一设备分别向至少一个终端设备中的每个终端设备发送对应的第一配置信息，每个终端设备对应的第一配置信息均相同。In an implementation manner, the first device sends a piece of first configuration information to at least one terminal device, or the first device sends corresponding first configuration information to each of the at least one terminal device, and each terminal The first configuration information corresponding to the devices is the same.
在第一组播组成组之后，第一设备可以通过一条信令向至少一个终端设备发送第一组播组对应的CSI报告的配置信息，从而可以有效节省通信信令。若在第一组播组成组之前，第一设备分别向至少一个终端设备中的每个终端设备发送相同的CSI报告配置信息，从而提高了CSI报告资源配置的灵活性，以及可实现性。After the first multicast group is formed, the first device may send configuration information of the CSI report corresponding to the first multicast group to at least one terminal device through a signaling, thereby effectively saving communication signaling. If the first device sends the same CSI report configuration information to each of the at least one terminal device before forming a group through the first multicast, thereby improving the flexibility and practicability of CSI report resource configuration.
第四方面，提供一种组播信道状态信息的获取方法，该方法可以由第一终端设备执行，也可以由应用于第一终端设备中的芯片执行，下文仅以执行主体为第一终端设备作为示例。该方法包括：第一终端设备接收来自第一设备的第一配置信息，第一配置信息用于指示信道状态信息CSI报告的时频资源；第一终端设备接收来自第一设备的信道状态信息参考信号CSI-RS；第一终端设备根据CSI-RS向第一设备发送第一CSI报告，第一终端设备属于第一组播组，承载第一CSI报告的时频资源还承载来自第一组播组中的至少一个终端设备的至少一个CSI报告，且所述第一CSI属于所述至少一 个CSI报告，CSI报告用于第一设备确定组播信道状态信息；第一终端设备接收来自第一设备的组播数据。In the fourth aspect, a method for acquiring multicast channel state information is provided. This method can be executed by the first terminal device, or can be executed by a chip applied to the first terminal device. In the following, only the first terminal device is the subject of execution. as an example. The method includes: the first terminal device receives first configuration information from the first device, the first configuration information is used to indicate the time-frequency resource of channel state information CSI report; the first terminal device receives the channel state information reference from the first device Signal CSI-RS; the first terminal device sends a first CSI report to the first device according to the CSI-RS, the first terminal device belongs to the first multicast group, and the time-frequency resource carrying the first CSI report also carries information from the first multicast group At least one CSI report of at least one terminal device in the group, and the first CSI belongs to the at least one CSI report, and the CSI report is used for the first device to determine multicast channel state information; the first terminal device receives the information from the first device multicast data.
在一种实施方式中，第一配置信息包括第一时限，第一配置信息用于指示第一终端设备在第一时限内发送第一CSI报告。In an implementation manner, the first configuration information includes a first time limit, and the first configuration information is used to instruct the first terminal device to send the first CSI report within the first time limit.
在一种实施方式中，第一配置信息用于指示第一终端设备发送第一CSI报告的时频资源的周期和起始时间点。In an implementation manner, the first configuration information is used to indicate a period and a starting time point of the time-frequency resource for the first terminal device to send the first CSI report.
在一种实施方式中，该方法还包括：第一终端设备接收来自第一设备的媒体接入控制层的控制单元MAC CE；终端设备根据MAC CE向第一设备发送第一CSI报告。In an embodiment, the method further includes: the first terminal device receives a MAC CE from the control unit of the media access control layer of the first device; and the terminal device sends the first CSI report to the first device according to the MAC CE.
在一种实施方式中，该方法还包括：第一终端设备接收来自第一设备的第二控制信息；终端设备根据第二控制信息向第一设备发送第一CSI报告。In an implementation manner, the method further includes: the first terminal device receiving second control information from the first device; and the terminal device sending the first CSI report to the first device according to the second control information.
在一种实施方式中，该方法还包括：第一终端设备接收来自第一设备的第三控制信息，第三控制信息用于指示组播数据的时频资源，其中，第三控制信息还包括第一组播组的组标识，第三控制信息是第一设备根据物理层组播波束赋形或者预编码矩阵发送的。In one embodiment, the method further includes: the first terminal device receives third control information from the first device, the third control information is used to indicate the time-frequency resource of the multicast data, wherein the third control information further includes The group identifier of the first multicast group, and the third control information are sent by the first device according to the physical layer multicast beamforming or the precoding matrix.
在一种实施方式中，第一CSI-RS承载于第一频域资源，组播数据承载于第二频域资源，其中，第二频域资源与第一频域资源相同，或者，第二频域资源为第一频域资源的子集。In one embodiment, the first CSI-RS is carried on a first frequency domain resource, and the multicast data is carried on a second frequency domain resource, where the second frequency domain resource is the same as the first frequency domain resource, or, the second frequency domain resource is The frequency domain resource is a subset of the first frequency domain resource.
在一种实施方式中，第一设备为网络设备，或者第一设备为第一组播组中一个终端设备。In an implementation manner, the first device is a network device, or the first device is a terminal device in the first multicast group.
第五方面，提供一种通信装置，该通信装置包括发送模块、接收模块和处理模块，其中，发送模块用于向第一组播组中至少一个终端设备发送信道探测参考信号SRS配置信息，SRS配置信息指示用于发送SRS的第一时频资源、SRS的序列和用于发送SRS的天线端口；接收模块用于在第一时频资源上接收来自至少一个终端设备的至少一个SRS，并基于至少一个SRS确定组播信道状态信息，其中，承载至少一个SRS的时频资源相同，且至少一个SRS的序列相同；处理模块用于根据组播信道状态信息确定物理层组播波束赋形或者预编码矩阵；发送模块还用于根据物理层组播波束赋形或者预编码矩阵向至少一个终端设备发送组播数据。In a fifth aspect, a communication device is provided, which includes a sending module, a receiving module, and a processing module, wherein the sending module is configured to send channel sounding reference signal SRS configuration information to at least one terminal device in the first multicast group, and the SRS The configuration information indicates the first time-frequency resource for sending SRS, the sequence of SRS and the antenna port for sending SRS; the receiving module is used to receive at least one SRS from at least one terminal device on the first time-frequency resource, and based on At least one SRS determines multicast channel state information, wherein the time-frequency resources carrying at least one SRS are the same, and the sequence of at least one SRS is the same; the processing module is used to determine the physical layer multicast beamforming or pre-set according to the multicast channel state information Coding matrix; the sending module is further configured to send multicast data to at least one terminal device according to the physical layer multicast beamforming or precoding matrix.
在一种实施方式中，至少一个SRS是通过相同的天线端口发送的。In one embodiment, at least one SRS is transmitted through the same antenna port.
在一种实施方式中，接收模块还用于接收来自至少一个终端设备的至少一个天线端口指示信息，天线端口指示信息用于指示对应终端设备的天线端口数量，或者，对应终端设备的天线端口索引的集合；处理模块还用于根据至少一个天线端口指示信息确定用于发送SRS的天线端口。In one embodiment, the receiving module is further configured to receive at least one antenna port indication information from at least one terminal device, where the antenna port indication information is used to indicate the number of antenna ports of the corresponding terminal device, or the antenna port index of the corresponding terminal device A set; the processing module is further configured to determine an antenna port for sending the SRS according to at least one antenna port indication information.
在一种实施方式中，发送模块还用于根据物理层组播波束赋形或者预编码矩阵向至少一个终端设备发送第一控制信息，第一控制信息用于指示组播数据的时频资源，其中，第一控制信息还包括第一组播组的组标识。In one embodiment, the sending module is further configured to send first control information to at least one terminal device according to the physical layer multicast beamforming or precoding matrix, where the first control information is used to indicate the time-frequency resource of the multicast data, Wherein, the first control information further includes a group identifier of the first multicast group.
在一种实施方式中，组播数据承载于第二时频资源，其中，第二时频资源与第一时频资源的频域资源相同，或者，第二时频资源的频域资源为第一时频资源的频域资源的子集。In one embodiment, the multicast data is carried on the second time-frequency resource, where the second time-frequency resource is the same as the frequency domain resource of the first time-frequency resource, or the frequency domain resource of the second time-frequency resource is the same as the frequency domain resource of the first time-frequency resource. A subset of frequency domain resources of a time-frequency resource.
在一种实施方式中，该通信装置为网络设备，或者该通信装置为第一组播组中一 个终端设备。也可以是应用于网络设备或终端中的芯片或者其他具有上述网络设备或终端设备功能的组合器件。In an implementation manner, the communication device is a network device, or the communication device is a terminal device in the first multicast group. It may also be a chip applied to a network device or a terminal, or other combined devices having the functions of the above-mentioned network device or terminal device.
当通信装置是网络设备或终端设备，或可实现上述网络设备或终端设备功能的组合器件时，接收模块可以接收器，可以包括天线和射频电路等，处理模块可以是处理器，发送模块可以是发射器，可以包括天线和射频电路等，其中接收器和发射器可以是整合的收发器。当通信装置是具有上述网络设备或终端设备功能的部件时，接收模块可以是射频单元，处理模块可以是处理器，发送模块可以是射频单元。当通信装置是应用于网络设备或终端中的芯片***时，接收模块可以是芯片***的输入接口、处理模块可以是芯片***的处理器，例如：中央处理单元(central processing unit，CPU)，发送模块可以是芯片***的输出接口。芯片***可以是片上***(system on chip，SOC)，也可以是基带芯片等，其中基带芯片可以包括处理器、信道编码器、数字信号处理器、调制解调器和接口模块等。When the communication device is a network device or a terminal device, or a combined device that can realize the functions of the above-mentioned network device or terminal device, the receiving module can be a receiver, and can include an antenna and a radio frequency circuit, etc., the processing module can be a processor, and the sending module can be The transmitter may include an antenna and a radio frequency circuit, etc., wherein the receiver and the transmitter may be an integrated transceiver. When the communication device is a component having the functions of the above-mentioned network equipment or terminal equipment, the receiving module may be a radio frequency unit, the processing module may be a processor, and the sending module may be a radio frequency unit. When the communication device is a chip system applied to a network device or a terminal, the receiving module may be an input interface of the chip system, and the processing module may be a processor of the chip system, for example: a central processing unit (central processing unit, CPU), sending The module may be an output interface of the chip system. The chip system can be a system on chip (system on chip, SOC), or a baseband chip, etc., where the baseband chip can include a processor, a channel encoder, a digital signal processor, a modem, and an interface module.
在一种实施方式中，发送模块还用于向至少一个终端设备发送一个SRS配置信息，或者，发送模块还用于分别向至少一个终端设备中的每个终端设备发送对应的SRS配置信息，每个终端设备对应的SRS配置信息均相同。In one embodiment, the sending module is further configured to send a piece of SRS configuration information to at least one terminal device, or the sending module is further configured to send corresponding SRS configuration information to each of the at least one terminal device, each The SRS configuration information corresponding to each terminal device is the same.
第六方面，提供一种通信装置，该通信装置包括接收模块和发送模块，其中，接收模块用于接收来自第一设备的信道探测参考信号SRS配置信息，SRS配置信息指示用于发送SRS的第一时频资源、SRS的序列和用于发送SRS的天线端口；发送模块用于在第一时频资源上向第一设备发送SRS，SRS用于第一设备根据至少一个SRS确定第一组播组的组播信道状态信息；接收模块还用于接收来自第一设备的组播数据。According to a sixth aspect, a communication device is provided, and the communication device includes a receiving module and a sending module, wherein the receiving module is configured to receive channel sounding reference signal SRS configuration information from the first device, and the SRS configuration information indicates the first device used to send the SRS. A time-frequency resource, an SRS sequence, and an antenna port for sending the SRS; the sending module is used to send the SRS to the first device on the first time-frequency resource, and the SRS is used by the first device to determine the first multicast according to at least one SRS The multicast channel status information of the group; the receiving module is also used to receive the multicast data from the first device.
在一种实施方式中，SRS是通过预设的天线端口发送的，或者，SRS是通过SRS配置信息中指示的天线端口发送的。In an implementation manner, the SRS is sent through a preset antenna port, or the SRS is sent through an antenna port indicated in the SRS configuration information.
在一种实施方式中，发送模块还用于向第一设备发送天线端口指示信息，天线端口指示信息用于指示该通信装置的天线端口数量，或者，该通信装置的天线端口索引的集合；天线端口指示信息用于第一设备确定用于发送SRS的天线端口。In one embodiment, the sending module is further configured to send antenna port indication information to the first device, where the antenna port indication information is used to indicate the number of antenna ports of the communication device, or a set of antenna port indexes of the communication device; The port indication information is used by the first device to determine an antenna port for sending the SRS.
在一种实施方式中，接收模块还用于接收来自第一设备的第一控制信息，第一控制信息用于指示组播数据的时频资源，其中，第一控制信息还包括第一组播组的组标识，第一控制信息是第一设备根据物理层组播波束赋形或者预编码矩阵发送的。In one embodiment, the receiving module is further configured to receive first control information from the first device, the first control information is used to indicate the time-frequency resource of the multicast data, wherein the first control information also includes the first multicast The group identifier of the group, the first control information is sent by the first device according to the physical layer multicast beamforming or the precoding matrix.
在一种实施方式中，组播数据承载于第二时频资源，其中，第二时频资源与第一时频资源的频域资源相同，或者，第二时频资源的频域资源为第一时频资源的频域资源的子集。In one embodiment, the multicast data is carried on the second time-frequency resource, where the second time-frequency resource is the same as the frequency domain resource of the first time-frequency resource, or the frequency domain resource of the second time-frequency resource is the same as the frequency domain resource of the first time-frequency resource. A subset of frequency domain resources of a time-frequency resource.
在一种实施方式中，第一设备为网络设备，或者第一设备为第一组播组中一个终端设备。也可以是应用于网络设备或终端中的芯片或者其他具有上述网络设备或终端设备功能的组合器件。In an implementation manner, the first device is a network device, or the first device is a terminal device in the first multicast group. It may also be a chip applied to a network device or a terminal, or other combined devices having the functions of the above-mentioned network device or terminal device.
当通信装置是网络设备或终端设备，或可实现上述网络设备或终端设备功能的组合器件时，接收模块可以接收器，可以包括天线和射频电路等，处理模块可以是处理器，发送模块可以是发射器，可以包括天线和射频电路等，其中接收器和发射器可以是整合的收发器。当通信装置是具有上述网络设备或终端设备功能的部件时，接收模块可以是射频单元，处理模块可以是处理器，发送模块可以是射频单元。当通信装置 是应用于网络设备或终端中的芯片***时，接收模块可以是芯片***的输入接口、处理模块可以是芯片***的处理器，例如：中央处理单元(central processing unit，CPU)，发送模块可以是芯片***的输出接口。芯片***可以是片上***(system on chip，SOC)，也可以是基带芯片等，其中基带芯片可以包括处理器、信道编码器、数字信号处理器、调制解调器和接口模块等。When the communication device is a network device or a terminal device, or a combined device that can realize the functions of the above-mentioned network device or terminal device, the receiving module can be a receiver, and can include an antenna and a radio frequency circuit, etc., the processing module can be a processor, and the sending module can be The transmitter may include an antenna and a radio frequency circuit, etc., wherein the receiver and the transmitter may be an integrated transceiver. When the communication device is a component having the functions of the above-mentioned network equipment or terminal equipment, the receiving module may be a radio frequency unit, the processing module may be a processor, and the sending module may be a radio frequency unit. When the communication device is a chip system applied to a network device or a terminal, the receiving module may be an input interface of the chip system, and the processing module may be a processor of the chip system, for example: a central processing unit (central processing unit, CPU), sending The module may be an output interface of the chip system. The chip system can be a system on chip (system on chip, SOC), or a baseband chip, etc., where the baseband chip can include a processor, a channel encoder, a digital signal processor, a modem, and an interface module.
第七方面，提供一种通信装置，该通信装置包括发送模块、接收模块和处理模块，其中，发送模块用于向第一组播组中至少一个终端设备发送至少一个第一配置信息，第一配置信息用于指示信道状态信息CSI报告的时频资源；发送模块还用于向至少一个终端设备发送信道状态信息参考信号CSI-RS；接收模块用于接收来自至少一个终端设备的至少一个CSI报告；处理模块用于根据至少一个CSI报告确定物理层组播波束赋形或者预编码矩阵；发送模块还用于根据物理层组播波束赋形或者预编码矩阵向至少一个终端设备发送组播数据。In a seventh aspect, a communication device is provided, the communication device includes a sending module, a receiving module, and a processing module, wherein the sending module is configured to send at least one piece of first configuration information to at least one terminal device in the first multicast group, and the first The configuration information is used to indicate the time-frequency resource of the channel state information CSI report; the sending module is also used to send the channel state information reference signal CSI-RS to at least one terminal device; the receiving module is used to receive at least one CSI report from at least one terminal device The processing module is used to determine the physical layer multicast beamforming or precoding matrix according to at least one CSI report; the sending module is also used to send multicast data to at least one terminal device according to the physical layer multicast beamforming or precoding matrix.
在一种实施方式中，第一配置信息包括第一时限，第一配置信息用于指示至少一个终端设备在第一时限内发送CSI报告。In an implementation manner, the first configuration information includes a first time limit, and the first configuration information is used to instruct at least one terminal device to send a CSI report within the first time limit.
在一种实施方式中，第一配置信息用于指示信道状态信息CSI报告的时频资源的周期和起始时间点。In an implementation manner, the first configuration information is used to indicate a period and a starting time point of the time-frequency resource reported by the channel state information (CSI).
在一种实施方式中，发送模块还用于向至少一个终端设备发送媒体接入控制层的控制单元MAC CE，用于指示至少一个终端设备向该通信装置发送CSI报告。In one embodiment, the sending module is further configured to send a control element MAC CE of the medium access control layer to at least one terminal device, and is used to instruct at least one terminal device to send a CSI report to the communication device.
在一种实施方式中，发送模块还用于向至少一个终端设备发送第二控制信息，用于指示至少一个终端设备向该通信装置发送CSI报告。In an implementation manner, the sending module is further configured to send second control information to at least one terminal device, for instructing at least one terminal device to send a CSI report to the communication apparatus.
在一种实施方式中，发送模块还用于根据物理层组播波束赋形或者预编码矩阵向至少一个终端设备发送第三控制信息，第三控制信息用于指示组播数据的时频资源，其中，第三控制信息还包括第一组播组的组标识。In one embodiment, the sending module is further configured to send third control information to at least one terminal device according to the physical layer multicast beamforming or precoding matrix, where the third control information is used to indicate the time-frequency resource of the multicast data, Wherein, the third control information also includes the group identifier of the first multicast group.
在一种实施方式中，CSI-RS承载于第一频域资源，组播数据承载于第二频域资源，其中，第二频域资源与第一频域资源相同，或者，第二频域资源为第一频域资源的子集。In one embodiment, the CSI-RS is borne on a first frequency domain resource, and the multicast data is borne on a second frequency domain resource, where the second frequency domain resource is the same as the first frequency domain resource, or the second frequency domain resource The resources are a subset of the first frequency domain resources.
在一种实施方式中，该通信装置为网络设备，或者通信装置为第一组播组中一个终端设备。In an implementation manner, the communication device is a network device, or the communication device is a terminal device in the first multicast group.
在一种实施方式中，发送模块用于向至少一个终端设备发送一个第一配置信息，或者，发送模块用于分别向至少一个终端设备中的每个终端设备发送对应的第一配置信息，每个终端设备对应的第一配置信息均相同。In one embodiment, the sending module is configured to send a piece of first configuration information to at least one terminal device, or the sending module is configured to send corresponding first configuration information to each of the at least one terminal device, each The first configuration information corresponding to each terminal device is the same.
第八方面，提供一种通信装置，该通信装置包括接收模块、处理模块和发送模块，其中，接收模块用于接收来自第一设备的第一配置信息，第一配置信息用于指示信道状态信息CSI报告的时频资源；接收模块还用于接收来自第一设备的信道状态信息参考信号CSI-RS；处理模块用于根据CSI-RS向第一设备发送CSI报告，CSI报告用于第一设备根据至少一个CSI报告确定第一组播组的组播信道状态信息；接收模块还用于接收来自第一设备的组播数据。In an eighth aspect, there is provided a communication device, which includes a receiving module, a processing module, and a sending module, wherein the receiving module is used to receive first configuration information from a first device, and the first configuration information is used to indicate channel state information The time-frequency resource of the CSI report; the receiving module is also used to receive the channel state information reference signal CSI-RS from the first device; the processing module is used to send a CSI report to the first device according to the CSI-RS, and the CSI report is used for the first device Determine the multicast channel state information of the first multicast group according to at least one CSI report; the receiving module is also used to receive multicast data from the first device.
在一种实施方式中，第一配置信息包括第一时限，第一配置信息用于指示该通信装置在第一时限内发送CSI报告。In an implementation manner, the first configuration information includes a first time limit, and the first configuration information is used to instruct the communication device to send the CSI report within the first time limit.
在一种实施方式中，第一配置信息用于指示该通信装置发送CSI报告的时频资源的周期和起始时间点。In an implementation manner, the first configuration information is used to indicate the period and the starting time point of the time-frequency resource for sending the CSI report by the communication device.
在一种实施方式中，接收模块还用于接收来自第一设备的媒体接入控制层的控制单元MAC CE；发送模块还用于根据MAC CE向第一设备发送CSI报告。In one embodiment, the receiving module is further configured to receive a control unit MAC CE from the media access control layer of the first device; the sending module is further configured to send a CSI report to the first device according to the MAC CE.
在一种实施方式中，接收模块还用于接收来自第一设备的第二控制信息；发送模块还用于第二控制信息向第一设备发送CSI报告。In an implementation manner, the receiving module is further configured to receive second control information from the first device; the sending module is further configured to send the second control information to the first device a CSI report.
在一种实施方式中，接收模块还用于接收来自第一设备的第三控制信息，第三控制信息用于指示组播数据的时频资源，其中，第三控制信息还包括第一组播组的组标识，第三控制信息是第一设备根据物理层组播波束赋形或者预编码矩阵发送的。In one embodiment, the receiving module is further configured to receive third control information from the first device, the third control information is used to indicate the time-frequency resource of the multicast data, wherein the third control information also includes the first multicast The group identifier of the group, and the third control information is sent by the first device according to the physical layer multicast beamforming or the precoding matrix.
在一种实施方式中，CSI-RS承载于第一频域资源，组播数据承载于第二频域资源，其中，第二频域资源与第一频域资源相同，或者，第二频域资源为第一频域资源的子集。In one embodiment, the CSI-RS is borne on a first frequency domain resource, and the multicast data is borne on a second frequency domain resource, where the second frequency domain resource is the same as the first frequency domain resource, or the second frequency domain resource The resources are a subset of the first frequency domain resources.
在一种实施方式中，第一设备为网络设备，或者第一设备为第一组播组中一个终端设备。In an implementation manner, the first device is a network device, or the first device is a terminal device in the first multicast group.
第九方面，提供一种通信装置，该通信装置包括处理器和通信接口；所述通信接口用于与所述通信装置之外的模块通信，所述处理器用于运行计算机程序或指令，以实现如上述第一方面中任一项所述的方法，或者，以实现如上述第三方面中任一项所述的方法。According to the ninth aspect, there is provided a communication device, which includes a processor and a communication interface; the communication interface is used to communicate with modules other than the communication device, and the processor is used to run computer programs or instructions to realize The method as described in any one of the above first aspects, or to implement the method as described in any one of the above third aspects.
第十方面，提供一种通信装置，该通信装置包括：处理器和通信接口；所述通信接口用于与所述通信装置之外的模块通信，所述处理器用于运行计算机程序或指令，以实现如上述第二方面中任一项所述的方法，或者，以实现如上述第四方面中任一项所述的方法。In a tenth aspect, there is provided a communication device, which includes: a processor and a communication interface; the communication interface is used to communicate with modules other than the communication device, and the processor is used to run computer programs or instructions to Implement the method as described in any one of the above-mentioned second aspects, or, to realize the method as described in any one of the above-mentioned fourth aspects.
第十一方面，提供一种计算机可读存储介质，其特征在于，所述计算机可读存储介质包括计算机程序指令，当所述计算机程序指令在通信装置上运行时，以使所述通信装置执行如上述第一方面中任一项所述的方法，或者，所述通信装置执行如上述第三方面中任一项所述的方法。In an eleventh aspect, a computer-readable storage medium is provided, wherein the computer-readable storage medium includes computer program instructions, and when the computer program instructions are run on a communication device, the communication device executes The method according to any one of the above first aspect, or, the communication device executes the method according to any one of the above third aspect.
第十二方面，提供一种计算机可读存储介质，其特征在于，所述计算机可读存储介质包括计算机程序，当所述计算机程序在计算机上运行时，以使所述计算机执行如上述第二方面中任一项所述的方法，或者，所述计算机执行如上述第四方面中任一项所述的方法。In a twelfth aspect, there is provided a computer-readable storage medium, characterized in that the computer-readable storage medium includes a computer program, and when the computer program is run on a computer, the computer executes the above-mentioned second The method according to any one of the above aspects, or, the computer executes the method according to any one of the above fourth aspects.
第十三方面，提供一种计算机程序产品，当所述计算机程序产品在通信装置上运行时，以使所述通信装置执行如上述第一方面或第三方面中任一项所述的方法。In a thirteenth aspect, a computer program product is provided. When the computer program product runs on a communication device, the communication device executes the method described in any one of the first aspect or the third aspect.
第十四方面，提供一种计算机程序产品，当所述计算机程序产品在通信装置上运行时，以使所述通信装置执行如上述第二方面或第四方面中任一项所述的方法。In a fourteenth aspect, a computer program product is provided. When the computer program product runs on a communication device, the communication device executes the method described in any one of the above-mentioned second aspect or the fourth aspect.
第十五方面，提供一种通信***，所述通信***包括如上述第五方面中所述的通信装置，以及如权利要第六方面所述的通信装置。A fifteenth aspect provides a communication system, the communication system includes the communication device as described in the fifth aspect, and the communication device as described in the sixth claim.
第十六方面，提供一种通信***，所述通信***包括如上述第七方面中所述的通信装置，以及如权利要第八方面所述的通信装置。A sixteenth aspect provides a communication system, the communication system comprising the communication device as described in the seventh aspect and the communication device as described in the eighth aspect.
可以理解地，上述提供的任一种通信装置、计算机可读存储介质、计算机程序产 品和通信***，均可以由上文所提供的对应的方法来实现，因此，其所能达到的有益效果可参考上文所提供的对应的方法中的有益效果，此处不再赘述。It can be understood that any communication device, computer-readable storage medium, computer program product, and communication system provided above can be implemented by the corresponding method provided above, and therefore, the beneficial effects it can achieve can be achieved by With reference to the beneficial effects in the corresponding method provided above, details will not be repeated here.
附图说明Description of drawings
图1为本申请实施例提供的一种通信***的***架构图；FIG. 1 is a system architecture diagram of a communication system provided by an embodiment of the present application;
图2为本申请实施例提供的一种通信装置的***架构图；FIG. 2 is a system architecture diagram of a communication device provided in an embodiment of the present application;
图3-图7为本申请实施例提供的一种组播信道状态信息的获取方法的流程示意图一至图五；Fig. 3-Fig. 7 are schematic flow diagrams 1 to 5 of a method for obtaining multicast channel state information provided by the embodiment of the present application;
图8为本申请实施例提供的一种通信装置的结构示意图；FIG. 8 is a schematic structural diagram of a communication device provided by an embodiment of the present application;
图9为本申请实施例提供的另一种通信装置的结构示意图。FIG. 9 is a schematic structural diagram of another communication device provided by an embodiment of the present application.
具体实施方式detailed description
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，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them.
本申请的说明书和权利要求书及上述附图中的术语“第一”、“第二”、“第三”和“第四”等是用于区别不同对象，而不是用于限定特定顺序。此外，术语“包括”和“具有”以及它们任何变形，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、***、产品或设备没有限定于已列出的步骤或单元，而是可选地还包括没有列出的步骤或单元，或可选地还包括对于这些过程、方法、产品或设备固有的其它步骤或单元。The terms "first", "second", "third" and "fourth" in the specification and claims of the present application and the above drawings are used to distinguish different objects, rather than to limit a specific order. Furthermore, the terms "include" and "have", as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but optionally also includes unlisted steps or units, or optionally further includes For other steps or units inherent in these processes, methods, products or apparatuses.
以下描述中，为了说明而不是为了限定，提出了诸如特定***结构、接口、技术之类的具体细节，以便透切理解本申请。然而，本领域的技术人员应当清楚，在没有这些具体细节的其它实施例中也可以实现本申请。在其它情况中，省略对众所周知的移动设备、电路以及方法的详细说明，以免不必要的细节妨碍本申请的描述。In the following description, for purposes of illustration rather than limitation, specific details such as specific system architectures, interfaces, and techniques are set forth in order to provide a thorough understanding of the present application. It will be apparent, however, to one skilled in the art that the present application may be practiced in other embodiments without these specific details. In other instances, detailed descriptions of well-known mobile devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.
另外，本文中术语“和/或”，仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本文中字符“/”，一般表示前后关联对象是一种“或”的关系。首先，为了便于理解本申请，对本申请实施例中涉及的通信技术以及网络架构进行简单介绍。In addition, the term "and/or" in this article is only an association relationship describing associated objects, indicating that there may be three relationships, for example, A and/or B may indicate: A exists alone, A and B exist simultaneously, There are three cases of B alone. In addition, the character "/" in this article generally indicates that the contextual objects are an "or" relationship. First, in order to facilitate the understanding of the present application, a brief introduction is given to the communication technology and network architecture involved in the embodiments of the present application.
本申请实施例提供的技术方案可用于支持侧行链路通信的任一通信***，该通信***可以为第三代合作伙伴计划(3rd generation partnership project，3GPP)通信***，例如，长期演进(long term evolution，LTE)***，又可以为第五代(5th generation，5G)移动通信***、新无线(new radio，NR)***、车与任何事物通信(vehicle-to-everything，V2X)***以及其他下一代通信***，也可以为非3GPP通信***，不予限制。下面以图1为例，对本申请实施例提供的方法进行描述。The technical solutions provided in the embodiments of the present application can be used in any communication system supporting sidelink communication, and the communication system can be a 3rd generation partnership project (3rd generation partnership project, 3GPP) communication system, for example, a long-term evolution (long term term evolution (LTE) system, and can be used for the fifth generation (5th generation, 5G) mobile communication system, new radio (new radio, NR) system, vehicle-to-everything (V2X) system and other The next generation communication system may also be a non-3GPP communication system without limitation. The following uses FIG. 1 as an example to describe the method provided in the embodiment of the present application.
如图1示出了本申请实施例提供的一种通信***的实施环境示意图。如图1所示，在本申请的实施例中，提供一种通信***，该通信***可以包括：至少两个终端设备，该至少两个终端设备处于一个组播组中，例如第一组播组中可以包括UE1和UE2。此外，该通信***还可以包括至少一个网络设备，该网络设备可以向至少两个终端设备发送组播数据。或者，该通信***还可以包括一个终端设备，该终端设备也可以向至少两个终端设备UE1和UE2发送组播数据，例如，图1中所示的，通信***还可以包括车辆UE3。FIG. 1 shows a schematic diagram of an implementation environment of a communication system provided by an embodiment of the present application. As shown in Figure 1, in the embodiment of the present application, a communication system is provided, which may include: at least two terminal devices, the at least two terminal devices are in a multicast group, for example, the first multicast The group may include UE1 and UE2. In addition, the communication system may further include at least one network device, and the network device may send multicast data to at least two terminal devices. Alternatively, the communication system may also include a terminal device, and the terminal device may also send multicast data to at least two terminal devices UE1 and UE2. For example, as shown in FIG. 1 , the communication system may also include a vehicle UE3.
在NR***中，存在两种空口，Uu口和PC5口。其中，Uu口可以用于终端设备与网络设备之间的通信，PC5口可以用于终端设备与终端设备之间的SL通信。其中，在本申请实施例中，术语“无线通信”还可以简称为“通信”，术语“通信”还可以描述为“数据传输”、“信息传输”或“传输”。In the NR system, there are two kinds of air interfaces, Uu interface and PC5 interface. Among them, the Uu port can be used for communication between the terminal device and the network device, and the PC5 port can be used for the SL communication between the terminal device and the terminal device. Wherein, in the embodiment of the present application, the term "wireless communication" may also be referred to as "communication" for short, and the term "communication" may also be described as "data transmission", "information transmission" or "transmission".
如图1中所示，终端设备向网络设备传输数据通信链路称为上行链路(Uplink，UL)，网络设备向终端设备传输数据通信链路称为下行链路(Downlink，DL)，网络设备可以通过Uu口向至少两个终端设备UE1和UE2发送组播数据。终端设备UE3可以通过PC5口向至少两个终端设备UE1和UE2发送组播数据，其中，终端设备UE3可以作为组播组中的发送端的终端设备，终端设备UE1和UE2可以作为组播组中的接收端的终端设备。As shown in Figure 1, the data communication link that the terminal equipment transmits to the network equipment is called an uplink (Uplink, UL), and the data communication link that the network equipment transmits to the terminal equipment is called a downlink (Downlink, DL). The device can send multicast data to at least two terminal devices UE1 and UE2 through the Uu interface. The terminal equipment UE3 can send multicast data to at least two terminal equipment UE1 and UE2 through the PC5 port, wherein the terminal equipment UE3 can be used as the terminal equipment of the sending end in the multicast group, and the terminal equipment UE1 and UE2 can be used as the terminal equipment in the multicast group. terminal equipment at the receiving end.
其中，当UE1和UE2向同一个信源端(如网络设备，或者终端设备如UE3)发送相同的业务请求，信源端根据该业务请求将业务数据发送到信源端的物理层，信源端通过物理层向UE1和UE2发送相同的业务数据。该相同的业务数据就可以称为物理层的组播数据。Among them, when UE1 and UE2 send the same service request to the same source end (such as a network device, or a terminal device such as UE3), the source end sends the service data to the physical layer of the source end according to the service request, and the source end Send the same service data to UE1 and UE2 through the physical layer. The same service data can be called multicast data of the physical layer.
本申请中，网络设备可以是任意一种具有无线收发功能的设备。包括但不限于：长期演进(Long Term Evolution，LTE)***中的演进型基站(NodeB或eNB或e-NodeB，evolutional Node B)，NR中的基站(gNodeB或gNB)或收发点(transmission receiving point/transmission reception point,TRP)，3GPP后续演进的基站，WiFi***中的接入节点，无线中继节点，无线回传节点等。基站可以是：宏基站，微基站，微微基站，小站，中继站，或，气球站等。多个基站可以支持上述提及的同一种技术的网络，也可以支持上述提及的不同技术的网络。基站可以包含一个或多个共站或非共站的TRP。网络设备还可以是云无线接入网络(cloud radio access network，CRAN)场景下的无线控制器、集中单元(centralized unit，CU)，和/或分布单元(distributed unit,DU)。网络设备还可以是服务器，可穿戴设备，或车载设备等。以下以网络设备为基站为例进行说明。所述多个网络设备可以为同一类型的基站，也可以为不同类型的基站。基站可以与终端设备进行通信，也可以通过中继站与终端设备进行通信。终端设备可以与不同技术的多个基站进行通信，例如，终端设备可以与支持LTE网络的基站通信，也可以与支持5G网络的基站通信，还可以支持与LTE网络基站以及5G网络基站的双连接。In this application, a network device may be any device with a wireless transceiver function. Including but not limited to: evolved base station (NodeB or eNB or e-NodeB, evolutional Node B) in the long-term evolution (Long Term Evolution, LTE) system, base station (gNodeB or gNB) or transmission receiving point in NR /transmission reception point, TRP), 3GPP subsequent evolution base station, access node in WiFi system, wireless relay node, wireless backhaul node, etc. The base station can be: a macro base station, a micro base station, a pico base station, a small station, a relay station, or a balloon station, etc. Multiple base stations may support the aforementioned networks of the same technology, or may support the aforementioned networks of different technologies. A base station may contain one or more co-sited or non-co-sited TRPs. The network device may also be a wireless controller, a centralized unit (centralized unit, CU), and/or a distributed unit (distributed unit, DU) in a cloud radio access network (cloud radio access network, CRAN) scenario. The network device can also be a server, a wearable device, or a vehicle-mounted device, etc. In the following, a network device is used as an example for description. The multiple network devices may be base stations of the same type, or base stations of different types. The base station can communicate with the terminal equipment, and can also communicate with the terminal equipment through the relay station. A terminal device can communicate with multiple base stations of different technologies. For example, a terminal device can communicate with a base station supporting an LTE network, or a base station supporting a 5G network, and can also support dual connections with a base station of an LTE network and a base station of a 5G network .
终端设备是一种具有无线收发功能的设备，可以部署在陆地上，包括室内或室外、手持、穿戴或车载；也可以部署在水面上(如轮船等)；还可以部署在空中(例如飞机、气球和卫星上等)。所述终端设备可以是手机(mobile phone)、平板电脑(Pad)、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(industrial control)中的无线终端、车载终端设备、无人驾驶(self driving)中的无线终端、远程医疗(remote medical)中的无线终端、智能电网(smart grid)中的无线终端、运输安全(transportation safety)中的无线终端、智慧城市(smart city)中的无线终端、智慧家庭(smart home)中的无线终端、可穿戴终端设备等等。本申请的实施例对应用场景不做限定。终端设备有时也可以称为用户设备UE、接入终端设备、车载终端、工业控制终端、UE单元、UE站、移动站、移动 台、远方站、远程终端设备、移动设备、UE终端设备、终端设备、无线通信设备、UE代理或UE装置等。终端设备也可以是固定的或者移动的。Terminal equipment is a device with wireless transceiver function, which can be deployed on land, including indoor or outdoor, handheld, wearable or vehicle-mounted; it can also be deployed on water (such as ships, etc.); it can also be deployed in the air (such as aircraft, balloons and satellites, etc.). The terminal device may be a mobile phone, a tablet computer (Pad), a computer with a wireless transceiver function, a virtual reality (virtual reality, VR) terminal device, an augmented reality (augmented reality, AR) terminal device, an industrial control ( Wireless terminals in industrial control, vehicle-mounted terminal equipment, wireless terminals in self driving, wireless terminals in remote medical, wireless terminals in smart grid, transportation security Safety), wireless terminals in smart city, wireless terminals in smart home, wearable terminal devices, etc. The embodiments of the present application do not limit the application scenarios. Terminal equipment can sometimes be called user equipment UE, access terminal equipment, vehicle-mounted terminal, industrial control terminal, UE unit, UE station, mobile station, mobile station, remote station, remote terminal equipment, mobile equipment, UE terminal equipment, terminal device, wireless communication device, UE proxy or UE device, etc. Terminal equipment can also be fixed or mobile.
需要说明的是，图1仅为示例性附图，图1包括的设备的数量不受限制，且除图1所示设备之外，该通信架构还可以包括其他设备。此外，图1中各个设备的名称不受限制，除图1所示名称之外，各个设备还可以命名为其他名称，不予限制。It should be noted that FIG. 1 is only an exemplary drawing, and the number of devices included in FIG. 1 is not limited, and besides the devices shown in FIG. 1 , the communication architecture may further include other devices. In addition, the names of each device in FIG. 1 are not limited, and besides the names shown in FIG. 1 , each device can be named by other names without limitation.
在具体实现时，图1所示各网元，如：终端设备、网络设备可采用图2所示的组成结构或者包括图2所示的部件。图2为本申请实施例提供的一种通信装置200的结构示意图，当该通信装置200具有本申请实施例所述终端设备的功能时，该通信装置200可以为终端设备或者终端设备中的芯片或者片上***。当通信装置200具有本申请实施例所述的网络设备的功能时，通信装置200可以为网络设备或者网络设备中的芯片或者片上***。During specific implementation, each network element shown in FIG. 1 , such as terminal equipment and network equipment, may adopt the composition structure shown in FIG. 2 or include the components shown in FIG. 2 . Fig. 2 is a schematic structural diagram of a communication device 200 provided by the embodiment of the present application. When the communication device 200 has the function of the terminal device described in the embodiment of the present application, the communication device 200 can be a terminal device or a chip in the terminal device Or a system on a chip. When the communication device 200 has the function of the network device described in the embodiment of the present application, the communication device 200 may be a network device or a chip or a system on a chip in the network device.
如图2所示，该通信装置200可以包括处理器201，通信线路202以及通信接口203。进一步的，该通信装置200还可以包括存储器204。其中，处理器201，存储器204以及通信接口203之间可以通过通信线路202连接。As shown in FIG. 2 , the communication device 200 may include a processor 201 , a communication line 202 and a communication interface 203 . Further, the communication device 200 may further include a memory 204 . Wherein, the processor 201 , the memory 204 and the communication interface 203 may be connected through a communication line 202 .
其中，处理器201可以是中央处理器(Central Processing Unit，CPU)、通用处理器网络处理器(Network Processor，NP)、数字信号处理器(Digital Signal Processing，DSP)、微处理器、微控制器、可编程逻辑器件或它们的任意组合。处理器201还可以是其它具有处理功能的装置，如电路、器件或软件模块等。Wherein, the processor 201 can be a central processing unit (Central Processing Unit, CPU), a general-purpose processor, a network processor (Network Processor, NP), a digital signal processor (Digital Signal Processing, DSP), a microprocessor, a microcontroller , programmable logic devices, or any combination of them. The processor 201 may also be other devices with processing functions, such as circuits, devices, or software modules.
通信线路202，用于在信装置200所包括的各部件之间传送信息。The communication line 202 is used to transmit information between the components included in the communication device 200 .
通信接口203，用于与其他设备或其它通信网络进行通信。该其它通信网络可以为以太网，无线接入网(Radio Access Network，RAN)，无线局域网(Wireless Local Area Networks，WLAN)等。通信接口203可以是接口电路、管脚、射频模块、收发器或者任何能够实现通信的装置。The communication interface 203 is used for communicating with other devices or other communication networks. The other communication network may be Ethernet, radio access network (Radio Access Network, RAN), wireless local area network (Wireless Local Area Networks, WLAN), etc. The communication interface 203 may be an interface circuit, a pin, a radio frequency module, a transceiver or any device capable of realizing communication.
存储器204，用于存储指令。其中，指令可以是计算机程序。The memory 204 is used for storing instructions. Wherein, the instruction may be a computer program.
其中，存储器204可以是只读存储器(Read-only Memory，ROM)或可存储静态信息和/或指令的其他类型的静态存储设备，也可以是随机存取存储器(Random Access Memory，RAM)或者可存储信息和/或指令的其他类型的动态存储设备，还可以是电可擦可编程只读存储器(Electrically Erasable Programmable read-only Memory，EEPROM)、只读光盘(Compact Cisc read-only Memory，CD-ROM)或其他光盘存储、光碟存储、磁盘存储介质或其他磁存储设备，光碟存储包括压缩光碟、激光碟、光碟、数字通用光碟、或蓝光光碟等。Wherein, the memory 204 can be a read-only memory (Read-only Memory, ROM) or other types of static storage devices that can store static information and/or instructions, and can also be a random access memory (Random Access Memory, RAM) or can store Other types of dynamic storage devices that store information and/or instructions can also be Electrically Erasable Programmable read-only Memory (EEPROM), Compact Cisc read-only Memory (CD- ROM) or other optical disc storage, optical disc storage, magnetic disk storage media, or other magnetic storage devices, including compact discs, laser discs, optical discs, digital versatile discs, or Blu-ray discs.
需要说明的是，存储器204可以独立于处理器201存在，也可以和处理器201集成在一起。存储器204可以用于存储指令或者程序代码或者一些数据等。存储器204可以位于通信装置200内，也可以位于通信装置200外，不予限制。处理器201，用于执行存储器204中存储的指令，以实现本申请下述实施例提供的方法。It should be noted that the memory 204 may exist independently of the processor 201 or may be integrated with the processor 201 . The memory 204 may be used to store instructions or program codes or some data, and the like. The memory 204 may be located in the communication device 200 or outside the communication device 200, without limitation. The processor 201 is configured to execute instructions stored in the memory 204, so as to implement the methods provided in the following embodiments of the present application.
在一种示例中，处理器201可以包括一个或多个CPU，例如图2中的CPU0和CPU1。In an example, the processor 201 may include one or more CPUs, such as CPU0 and CPU1 in FIG. 2 .
作为一种可选的实现方式，通信装置200包括多个处理器，例如，除图2中的处理器201之外，还可以包括处理器207。As an optional implementation manner, the communications apparatus 200 includes multiple processors, for example, in addition to the processor 201 in FIG. 2 , it may further include a processor 207 .
作为一种可选的实现方式，通信装置200还包括输出设备205和输入设备206。示例性地，输入设备206是键盘、鼠标、麦克风或操作杆等设备，输出设备205是显示屏、扬声器等设备。As an optional implementation manner, the communication apparatus 200 further includes an output device 205 and an input device 206 . Exemplarily, the input device 206 is a device such as a keyboard, a mouse, a microphone, or a joystick, and the output device 205 is a device such as a display screen and a speaker.
需要说明的是，通信装置200可以是可穿戴设备、台式机、便携式电脑、网络服务器、移动手机、平板电脑、无线终端、嵌入式设备、芯片***或有图2中类似结构的设备。此外，图2中示出的组成结构并不构成对该通信装置的限定，除图2所示部件之外，该通信装置可以包括比图示更多或更少的部件，或者组合某些部件，或者不同的部件布置。It should be noted that the communication device 200 may be a wearable device, a desktop computer, a portable computer, a network server, a mobile phone, a tablet computer, a wireless terminal, an embedded device, a chip system or a device having a structure similar to that shown in FIG. 2 . In addition, the composition structure shown in FIG. 2 does not constitute a limitation to the communication device. In addition to the components shown in FIG. 2, the communication device may include more or less components than those shown in the illustration, or combine certain components , or different component arrangements.
本申请实施例中，芯片***可以由芯片构成，也可以包括芯片和其他分立器件。In the embodiment of the present application, the system-on-a-chip may be composed of chips, or may include chips and other discrete devices.
例如，上述装置200可以为一个芯片***，该芯片***可以如图2所示，至少可以包括一个或者多个处理器和收发电路，涉及本申请实施例所述的方法的程序指令在该一个或者多个处理器中执行，以使得该芯片***实现本申请的方法。For example, the above-mentioned device 200 may be a system-on-a-chip, and the system-on-a-chip may at least include one or more processors and transceiver circuits, as shown in FIG. Executed in multiple processors, so that the system-on-a-chip implements the method of the present application.
此外，本申请的各实施例之间涉及的动作、术语等均可以相互参考，不予限制。本申请的实施例中各个设备之间交互的消息名称或消息中的参数名称等只是一个示例，具体实现中也可以采用其他的名称，不予限制。In addition, actions, terms, etc. involved in various embodiments of the present application may refer to each other without limitation. In the embodiment of the present application, the names of messages exchanged between various devices or the names of parameters in messages are just examples, and other names may also be used in specific implementations, which are not limited.
接下来，以图1所示的通信***为例，结合相应的附图，对本申请实施例提供的实施方式进行描述。其中，下述实施例中的各设备可以具有图2所示部件。本申请各实施例之间涉及的动作，术语等均可以相互参考，不予限制。本申请的实施例中各个设备之间交互的消息名称或消息中的参数名称等只是一个示例，具体实现中也可以采用其他的名称，不予限制。Next, the communication system shown in FIG. 1 is taken as an example, and the implementation manners provided by the embodiments of the present application are described in conjunction with corresponding drawings. Wherein, each device in the following embodiments may have the components shown in FIG. 2 . The actions and terms involved in the various embodiments of the present application may refer to each other without limitation. In the embodiment of the present application, the names of messages exchanged between various devices or the names of parameters in messages are just examples, and other names may also be used in specific implementations, which are not limited.
本申请实施例提供的一种数据发送和接收的方法。该方法可以应用于第一设备与至少一个终端设备之间。其中，第一设备可以为网络设备，也可以为终端设备。具体的，如图3所示，该方法可以包括：A data sending and receiving method provided in an embodiment of the present application. The method can be applied between the first device and at least one terminal device. Wherein, the first device may be a network device or a terminal device. Specifically, as shown in Figure 3, the method may include:
301：第一设备向第一组播组中至少一个终端设备发送SRS配置信息，SRS配置信息指示用于发送SRS的第一时频资源、SRS的序列和用于发送SRS的天线端口。301: The first device sends SRS configuration information to at least one terminal device in the first multicast group, where the SRS configuration information indicates a first time-frequency resource used for sending the SRS, a sequence of the SRS, and an antenna port used for sending the SRS.
相应地，该至少一个终端设备接收来自第一设备的SRS配置信息。Correspondingly, the at least one terminal device receives the SRS configuration information from the first device.
示例性的，第一设备配置的可以是一种组特定SRS(Group Specific SRS)的配置信息，即用于确定组播信道状态的SRS的配置信息，具体的第一设备为第一组播组中的至少一个终端设备发送的SRS配置信息可以是相同的内容，也即第一设备为第一组播组中的终端设备配置组特定的SRS配置信息，组特定的SRS配置信息中指示的发送SRS的时频资源、SRS序列以及用于发送SRS对应的天线端口均相同。Exemplarily, the configuration information of the first device may be a group-specific SRS (Group Specific SRS) configuration information, that is, the configuration information of the SRS used to determine the state of the multicast channel, and the specific first device is the first multicast group The SRS configuration information sent by at least one terminal device in the multicast group may have the same content, that is, the first device configures group-specific SRS configuration information for the terminal devices in the first multicast group, and the transmission indicated in the group-specific SRS configuration information The time-frequency resources of the SRS, the SRS sequence, and the corresponding antenna ports for sending the SRS are all the same.
需要理解的是，本申请中描述的组播信道可以用于发送侧设备向同一个组播组中的至少一个接收侧设备传输组播数据。也就是说，发送侧设备向至少一个接收侧设备发送组播特定数据的物理层信道，可以称为组播信道。例如，发送侧设备以组播标识加扰组播数据并在组播信道上发送该组播数据，组播组内的终端设备可以在相同的时频资源上接收该组播数据，且相互之间不存在干扰。另外，当组播组内的至少一个终端设备被配置在相同的时频资源上向发送侧设备发送至少一个SRS，该至少一个SRS可以被发送侧设备视为组播信道上的一个整合的SRS，发送侧设备根据该整合的SRS确定组播信道的信道状态。It should be understood that the multicast channel described in this application can be used for a sending device to transmit multicast data to at least one receiving device in the same multicast group. That is to say, the physical layer channel through which the sending side device sends multicast specific data to at least one receiving side device may be referred to as a multicast channel. For example, the sending side device scrambles the multicast data with the multicast identifier and sends the multicast data on the multicast channel, the terminal devices in the multicast group can receive the multicast data on the same time-frequency resource, and communicate with each other There is no interference between. In addition, when at least one terminal device in the multicast group is configured to send at least one SRS to the sending device on the same time-frequency resource, the at least one SRS can be regarded as an integrated SRS on the multicast channel by the sending device , the sending side device determines the channel state of the multicast channel according to the integrated SRS.
由此，本申请实施例中的SRS配置信息具体可以为组特定SRS对应的配置信息，用于指示组播组中的至少一个终端设备发送SRS的配置信息。具体的，组特定SRS的配置信息可以包括时域配置参数、频域配置参数、端口配置参数以及SRS序列配置参数。Therefore, the SRS configuration information in the embodiment of the present application may specifically be the configuration information corresponding to the group-specific SRS, which is used to instruct at least one terminal device in the multicast group to send the configuration information of the SRS. Specifically, the group-specific SRS configuration information may include time domain configuration parameters, frequency domain configuration parameters, port configuration parameters, and SRS sequence configuration parameters.
示例性的，SRS配置信息中包括的时域配置参数和频域配置参数具体可以用于指示第一时频资源，即表示第一组播组中的至少一个终端设备发送的组特定SRS均可以承载于该第一时频资源上。Exemplarily, the time-domain configuration parameters and frequency-domain configuration parameters included in the SRS configuration information can be specifically used to indicate the first time-frequency resource, that is, it means that the group-specific SRS sent by at least one terminal device in the first multicast group can be carried on the first time-frequency resource.
此外，SRS配置信息中还可以包括用于发送SRS的天线端口，即表示第一组播组中的至少一个终端设备都可以通过SRS配置信息中指示的天线端口发送该组特定SRS。In addition, the SRS configuration information may also include an antenna port for sending the SRS, which means that at least one terminal device in the first multicast group can send the group-specific SRS through the antenna port indicated in the SRS configuration information.
进一步的，SRS配置信息中还可以包括用于指示至少一个终端设备发送SRS的序列。Further, the SRS configuration information may also include a sequence for instructing at least one terminal device to send the SRS.
在一种实施方式中，SRS配置信息中可以包括初始序列，用于指示对应的第一组播组中的至少一个终端设备生成发送参考信号时频资源位置上的序列。由于第一设备为第一组播组中的至少一个终端设备配置了相同的初始序列，因此，在后续的步骤302中，第一组播组中的至少一个终端设备发送的SRS的序列是相同的。In an implementation manner, the SRS configuration information may include an initial sequence, which is used to instruct at least one terminal device in the corresponding first multicast group to generate a sequence at a time-frequency resource position for sending a reference signal. Since the first device configures the same initial sequence for at least one terminal device in the first multicast group, in the subsequent step 302, the sequence of the SRS sent by at least one terminal device in the first multicast group is the same of.
需要说明的是，在本申请实施例中，第一组播组成组之前，基站或者其他网络设备可以为上述第一组播组的每个终端设备配置对应的无线网络临时标识(RNTI Radio Network Tempory Identity，RNTI)，该RNTI是唯一的，用于在通信***中标识该终端设备。例如，UE1对应RNTI1，UE2对应RNTI2。第一组播组成组之后，基站或者其他网络设备可以为上述第一组播组的每个终端设备配置对应的组标识，用于在通信***中标识该第一组播组。例如，UE1对应Group1，UE2也对应Group1。It should be noted that, in the embodiment of the present application, before the first multicast group is formed, the base station or other network equipment may configure a corresponding wireless network temporary identifier (RNTI Radio Network Tempory) for each terminal device of the above-mentioned first multicast group Identity, RNTI), the RNTI is unique, and is used to identify the terminal device in the communication system. For example, UE1 corresponds to RNTI1, and UE2 corresponds to RNTI2. After the first multicast group is formed, the base station or other network equipment may configure a corresponding group identifier for each terminal device of the first multicast group, so as to identify the first multicast group in the communication system. For example, UE1 corresponds to Group1, and UE2 also corresponds to Group1.
示例性的，组标识具体可以为组RNTI(Group RNTI)，即通过RNTI作为不同的组播组的区分。其中，Group RNTI具体可以由X比特来表示。本申请的实施例中对此不做具体限定。Exemplarily, the group identifier may specifically be a group RNTI (Group RNTI), that is, the RNTI is used as a distinction between different multicast groups. Wherein, the Group RNTI can be specifically represented by X bits. This is not specifically limited in the embodiments of the present application.
在一种实施方式中，第一设备可以向至少一个终端设备发送一个SRS配置信息。In an implementation manner, the first device may send one piece of SRS configuration information to at least one terminal device.
具体的，当该第一设备为网络设备时，该SRS配置信息可以承载于无线资源控制(Radio Resource Control，RRC)消息中，即网络设备可以通过在RRC消息中增加组特定的SRS配置信息的指示域。网络设备可以通过下行的组播信道，向至少一个终端设备发送该RRC消息，用于指示第一组播组对应的SRS配置信息。Specifically, when the first device is a network device, the SRS configuration information may be carried in a radio resource control (Radio Resource Control, RRC) message, that is, the network device may add group-specific SRS configuration information in the RRC message indicates the domain. The network device may send the RRC message to at least one terminal device through a downlink multicast channel, which is used to indicate the SRS configuration information corresponding to the first multicast group.
另外，当该第一设备为终端设备时，即第一设备为第一组播组中用于发送组播数据的发送端的终端设备(简称为发送UE)时，该SRS配置信息可以承载于PC5 RRC消息中。即发送UE可以通过在PC5 RRC消息中增加组特定的SRS配置信息的指示域。发送UE可以通过侧行组播信道，向至少一个终端设备发送该PC5 RRC消息，用于指示第一组播组对应的SRS配置信息。In addition, when the first device is a terminal device, that is, when the first device is a terminal device (referred to as the sending UE) for sending multicast data in the first multicast group, the SRS configuration information may be carried on the PC5 In the RRC message. That is, the sending UE can add the indication field of the group-specific SRS configuration information in the PC5 RRC message. The sending UE may send the PC5 RRC message to at least one terminal device through a sidelink multicast channel, to indicate the SRS configuration information corresponding to the first multicast group.
上述这种实施方式适用于第一组播组成组之后，第一设备可以通过一条信令向至少一个终端设备发送第一组播组对应的组特定SRS配置信息，从而可以有效节省通信信令。The above-mentioned implementation is applicable to after the first multicast group is formed, the first device can send group-specific SRS configuration information corresponding to the first multicast group to at least one terminal device through a single signaling, so that communication signaling can be effectively saved.
或者，在另一种实施方式中，第一设备可以分别向至少一个终端设备中的每个终端设备发送对应的SRS配置信息。Or, in another implementation manner, the first device may respectively send corresponding SRS configuration information to each of the at least one terminal device.
具体的，当该第一设备为网络设备时，网络设备可以分别向至少一个终端设备中的每个终端设备发送对应的RRC消息。例如，网络设备向UE1发送RRC1，该RRC1包括SRS配置信息；网络设备向UE2发送RRC2，该RRC2包括SRS配置信息。其中，每个终端设备如UE1和UE2对应的SRS配置信息均相同。Specifically, when the first device is a network device, the network device may respectively send a corresponding RRC message to each of the at least one terminal device. For example, the network device sends RRC1 to UE1, and the RRC1 includes SRS configuration information; the network device sends RRC2 to UE2, and the RRC2 includes SRS configuration information. Wherein, the SRS configuration information corresponding to each terminal device such as UE1 and UE2 is the same.
另外，当该第一设备为终端设备时，即第一设备为第一组播组中用于发送组播数据的发送端的终端设备(简称为发送UE)时，发送UE可以分别向至少一个终端设备中的每个终端设备发送对应的PC5 RRC消息。例如，发送UE向接收UE1发送PC5 RRC1，该PC5 RRC1包括SRS配置信息；发送UE向接收UE2发送PC5 RRC2，该PC5 RRC2包括SRS配置信息。其中，每个接收侧的终端设备对应的SRS配置信息均相同。In addition, when the first device is a terminal device, that is, when the first device is a terminal device (referred to as sending UE for short) for sending multicast data in the first multicast group, the sending UE may respectively send at least one terminal device Each end device in the device sends a corresponding PC5 RRC message. For example, the sending UE sends PC5 RRC1 to the receiving UE1, and the PC5 RRC1 includes SRS configuration information; the sending UE sends PC5 RRC2 to the receiving UE2, and the PC5 RRC2 includes SRS configuration information. Wherein, the SRS configuration information corresponding to each receiving terminal device is the same.
上述这种实施方式适用于第一组播组成组之前，第一设备可以通过N条信令分别向N个终端设备发送第一组播组对应的组特定SRS配置信息，其中，N可以为大于1的正整数。The above-mentioned implementation is applicable to before the first multicast group is formed, the first device may send group-specific SRS configuration information corresponding to the first multicast group to N terminal devices through N signaling, where N may be greater than A positive integer of 1.
302：第一组播组中的各个终端设备在第一时频资源上向第一设备发送SRS。302: Each terminal device in the first multicast group sends an SRS to the first device on the first time-frequency resource.
第一组播组中的至少一个终端设备成功接收到来自第一设备的组特定的SRS配置信息之后，该至少一个终端设备可以根据该SRS配置信息在相同的时频资源(第一时频资源)上向第一设备发送SRS。相应地，第一设备接收来自至少一个终端设备至少一个SRS。After at least one terminal device in the first multicast group successfully receives the group-specific SRS configuration information from the first device, the at least one terminal device can use the same time-frequency resource (the first time-frequency resource) according to the SRS configuration information ) to send an SRS to the first device. Correspondingly, the first device receives at least one SRS from at least one terminal device.
具体的，至少一个终端设备可以在SRS配置信息中指示的第一时频资源上向第一设备发送SRS。Specifically, at least one terminal device may send an SRS to the first device on the first time-frequency resource indicated in the SRS configuration information.
可选的，至少一个终端设备传输SRS的端口相同，即至少一个终端设备向第一设备发送SRS的天线端口数量以及对应的天线端口号均相同。Optionally, the port through which at least one terminal device transmits the SRS is the same, that is, the number of antenna ports through which the at least one terminal device transmits the SRS to the first device and the corresponding antenna port numbers are the same.
在一种实施方式中，终端设备可以根据预先约定，根据某一阈值确定发送SRS的天线端口数量，或者，根据某一天线端口的参数确定发送SRS的天线端口号。In an implementation manner, the terminal device may determine the number of antenna ports for sending SRS according to a certain threshold according to pre-agreement, or determine the number of antenna ports for sending SRS according to a parameter of a certain antenna port.
示例性的，根据协议约定，终端设备发送组特定SRS的端口数量对应的阈值为2，则终端设备可以通过端口port 1与port 2发送SRS。或者，根据协议约定，终端设备发送组特定SRS的端口索引为nrofSRS-Ports，根据索引nrofSRS-Ports可以确定，该索引对应的端口为port 1，则终端设备可以通过该port 1发送SRS。Exemplarily, according to the agreement, the threshold corresponding to the number of ports for the terminal device to send the group-specific SRS is 2, and the terminal device can send the SRS through ports port 1 and port 2. Or, according to the agreement, the port index for the terminal device to send the group-specific SRS is nrofSRS-Ports. According to the index nrofSRS-Ports, it can be determined that the port corresponding to the index is port 1, and the terminal device can send SRS through this port 1.
在另一种实施方式中，终端设备可以预先向第一设备上报天线端口指示信息，该天线端口指示信息可以用于指示对应终端设备的天线端口数量，或者，该天线端口指示信息可以用于指示对应终端设备的天线端口索引的集合。In another embodiment, the terminal device may report antenna port indication information to the first device in advance, and the antenna port indication information may be used to indicate the number of antenna ports of the corresponding terminal device, or the antenna port indication information may be used to indicate A collection of antenna port indices corresponding to terminal devices.
可选的，终端设备向第一设备上报天线端口指示信息，具体可以在步骤301之前，用于第一设备可以根据至少一个终端设备上报的至少一个天线端口指示信息确定用于发送SRS的天线端口，从而确定SRS配置信息。Optionally, the terminal device reports the antenna port indication information to the first device, specifically before step 301, for the first device to determine the antenna port used to send the SRS according to at least one antenna port indication information reported by at least one terminal device , so as to determine the SRS configuration information.
一种可能的方式中，UE1和UE2可以分别向网络设备上报各自的天线端口指示信息，该天线端口指示信息包括天线端口数量。具体的，该天线端口数量可以为该UE1或UE2能够支持的最大天线端口数量。从而网络设备可以根据UE1和UE2上报的天线端口数量，确定Group Specific SRS配置信息中用于发送SRS的天线端口数量。In a possible manner, UE1 and UE2 may respectively report respective antenna port indication information to the network device, where the antenna port indication information includes the number of antenna ports. Specifically, the number of antenna ports may be the maximum number of antenna ports that the UE1 or UE2 can support. Therefore, the network device can determine the number of antenna ports used to send the SRS in the Group Specific SRS configuration information according to the number of antenna ports reported by UE1 and UE2.
示例性的，当UE1向网络设备上报的天线端口数量为A1，UE2向网络设备上报 的天线端口数量为A2时，网络设备确定的Group Specific SRS配置信息中SRS的天线端口数量可以为A1和A2中的最小值，即min(A1，A2)。例如，A1>A2，则SRS的天线端口数量可以为A2。Exemplarily, when the number of antenna ports reported by UE1 to the network device is A1, and the number of antenna ports reported by UE2 to the network device is A2, the number of antenna ports of the SRS in the Group Specific SRS configuration information determined by the network device may be A1 and A2 The minimum value in , that is, min(A1, A2). For example, A1>A2, then the number of antenna ports of the SRS may be A2.
另一种可能的方式中，UE1和UE2分别向网络设备上报各自的天线端口指示信息，该天线端口指示信息包括UE1或UE2能够支持的最大天线端口集合。从而网络设备可以根据UE1和UE2分别上报的天线端口集合，确定Group Specific SRS配置信息中SRS的天线端口集合。In another possible manner, UE1 and UE2 respectively report respective antenna port indication information to the network device, where the antenna port indication information includes a maximum set of antenna ports that UE1 or UE2 can support. Therefore, the network device can determine the antenna port set of the SRS in the Group Specific SRS configuration information according to the antenna port sets reported by UE1 and UE2 respectively.
示例性的，UE1向网络设备上报的最大天线端口集合为S1，天线端口集合S1可以包括UE1支持的一个或多个天线端口；UE2向网络设备上报的最大天线端口集合为S2，天线端口集合S2可以包括UE2支持的一个或多个天线端口。网络设备确定的Group Specific SRS配置信息中SRS的天线端口集合为S1和S2的交集S。其中，天线端口集合S可以包括UE1和UE2都支持的一个或多个天线端口。Exemplarily, the maximum antenna port set reported by UE1 to the network device is S1, and the antenna port set S1 may include one or more antenna ports supported by UE1; the maximum antenna port set reported by UE2 to the network device is S2, and the antenna port set S2 One or more antenna ports supported by UE2 may be included. The antenna port set of the SRS in the Group Specific SRS configuration information determined by the network device is the intersection S of S1 and S2. Wherein, the antenna port set S may include one or more antenna ports supported by both UE1 and UE2.
303：第一设备根据至少一个SRS确定组播信道状态信息。303: The first device determines multicast channel state information according to at least one SRS.
其中，承载至少一个SRS的时频资源相同，且至少一个SRS的序列相同。Wherein, the time-frequency resources bearing at least one SRS are the same, and the sequence of the at least one SRS is the same.
需要说明的是，在本申请的实施例中，如果假设通信传输是没有时延的，则第一设备可以在第一时频资源上接收来自至少一个终端设备的至少一个SRS。但在实际的应用中，通信传输存在一定的时延，因此，至少一个终端设备发送SRS的时域资源与第一设备接收SRS的时域资源存在一定的偏差，本申请实施例对此忽略不计，但并不表示实际传输中没有时延。It should be noted that, in the embodiment of the present application, if it is assumed that communication transmission has no time delay, the first device may receive at least one SRS from at least one terminal device on the first time-frequency resource. However, in actual applications, there is a certain time delay in communication transmission. Therefore, there is a certain deviation between the time domain resource for at least one terminal device to send SRS and the time domain resource for the first device to receive SRS, which is ignored in the embodiment of the present application. , but it does not mean that there is no delay in actual transmission.
具体的，第一设备可以根据信道互异性，基于至少一个SRS进行信道测量和估计，得到第一设备和终端设备之间的组播信道状态信息。在一种可能的情况下，通信***中上下行链路可以在相同频域资源的不同时域上传输，所以在相对较短的时间之内(信道传播的相干时间)，可以认为上行链路和下行链路的传输信号所经历的信道衰落是相同的，即信道互易性。Specifically, the first device may perform channel measurement and estimation based on at least one SRS according to channel mutuality, and obtain multicast channel state information between the first device and the terminal device. In a possible situation, the uplink and downlink in the communication system can be transmitted in different time domains of the same frequency domain resource, so within a relatively short time (coherence time of channel propagation), the uplink can be considered as It is the same as the channel fading experienced by the downlink transmission signal, that is, channel reciprocity.
其中，本申请实施例中的组播信道状态信息，是指一个发送侧设备(可以是网络设备，或者终端设备)与多个接收侧设备之间的组播信道的信道状态信息，组播信道用于发送侧设备向多个接收侧设备传输组播数据。组播信道状态信息是特定的组播信道的状态信息，区分于现有的一个发送设备与一个接收设备之间的信道状态信息。Among them, the multicast channel state information in the embodiment of the present application refers to the channel state information of the multicast channel between a sending side device (which may be a network device or a terminal device) and multiple receiving side devices, and the multicast channel It is used for the sending device to transmit multicast data to multiple receiving devices. The multicast channel state information is the state information of a specific multicast channel, which is different from the existing channel state information between a sending device and a receiving device.
具体的，第一设备根据至少一个SRS确定组播信道状态信息的算法可以参照相关的技术实现，本申请对此不再赘述。Specifically, the algorithm for the first device to determine the state information of the multicast channel according to at least one SRS may be implemented by referring to related technologies, which will not be described in detail in this application.
在本申请的上述实施方式中，第一设备可以基于多个终端设备发送的SRS综合进行信道测量和估计，因此，SRS的信号功率更高，有利于第一设备对组播信道测量的精度，提高通信质量。In the above embodiments of the present application, the first device can comprehensively perform channel measurement and estimation based on the SRS sent by multiple terminal devices. Therefore, the signal power of the SRS is higher, which is beneficial to the accuracy of the multicast channel measurement by the first device. Improve communication quality.
304：第一设备根据组播信道状态信息确定物理层组播波束赋形或者预编码矩阵。304: The first device determines a physical layer multicast beamforming or a precoding matrix according to the multicast channel state information.
上述的步骤303和304中，第一设备执行的步骤可以是在是同一个步骤完成的，例如，第一设备可以根据至少一个SRS确定物理层组播波束赋形或者预编码矩阵。或者，也可以是第一设备先后执行的，例如，第一设备先执行步骤303得到组播信道状态信息，再执行步骤304得到物理层组播波束赋形或者预编码矩阵。本申请对此不作限制。In the above steps 303 and 304, the steps performed by the first device may be completed in the same step, for example, the first device may determine a physical layer multicast beamforming or a precoding matrix according to at least one SRS. Alternatively, the first device may execute it sequentially. For example, the first device first executes step 303 to obtain the multicast channel state information, and then executes step 304 to obtain the physical layer multicast beamforming or precoding matrix. This application is not limited to this.
其中，波束赋形技术是基于天线阵列的信号预处理技术，也可以称为波束成型或空域滤波技术，是一种使用传感器阵列定向发送和接收信号的信号处理技术。Among them, beamforming technology is a signal preprocessing technology based on antenna arrays, which can also be called beamforming or spatial filtering technology, and is a signal processing technology that uses sensor arrays to send and receive signals in a directional manner.
具体的，在本申请的实施例中，波束赋形技术应用于数据发送端，即发送端可以通过调整发射天线相位阵列的基本单元的参数，使得某些角度的发射信号获得相长干涉，而另一些角度的发射信号获得相消干涉，从而产生具有指向性的发射波束，发送给特定的用户，获得明显的阵列增益。Specifically, in the embodiments of this application, the beamforming technology is applied to the data transmitting end, that is, the transmitting end can adjust the parameters of the basic unit of the transmitting antenna phase array so that the transmitting signals at certain angles can obtain constructive interference, while The transmission signals at other angles obtain destructive interference, thereby generating a directional transmission beam, which is sent to a specific user, and obtains obvious array gain.
在本申请的实施方式中，可以定义一个波束赋形的集合，该波束赋形集合可以包括多个波束赋形或空域滤波的系数矩阵或向量。具体的，可以通过索引值来区分该波束赋形集合中的不同波束，以及该波束对应的系数矩阵或向量。In the embodiments of the present application, a beamforming set may be defined, and the beamforming set may include multiple coefficient matrices or vectors for beamforming or spatial filtering. Specifically, different beams in the beamforming set and coefficient matrices or vectors corresponding to the beams can be distinguished through index values.
此外，预编码技术可以通过基带对待发送的信号进行预先处理，生成预编码矩阵。具体的，发送端可以根据信道所能支持的并行传输流数量，将有限的发射功率分配给能够有效传输的数据流，从而使得发送信号可以更有指向性的发送给特定的用户，避免发射功率的浪费。In addition, the precoding technology can preprocess the signal to be transmitted through the baseband to generate a precoding matrix. Specifically, the sender can allocate limited transmit power to data streams that can be effectively transmitted according to the number of parallel transmission streams that the channel can support, so that the transmit signal can be sent to a specific user in a more directional manner, avoiding the transmission power waste.
具体的，第一设备根据组播信道状态信息确定组播波束赋形或者预编码矩阵的算法，可以参照相关的技术实现，本申请对此不做具体限定。Specifically, the algorithm for the first device to determine the multicast beamforming or precoding matrix according to the state information of the multicast channel may be implemented by referring to related technologies, which is not specifically limited in this application.
305：第一设备根据物理层组播波束赋形或者预编码矩阵向至少一个终端设备发送组播数据。305: The first device sends multicast data to at least one terminal device according to physical layer multicast beamforming or a precoding matrix.
在一种可能的实施方式中，组播数据可以承载于第二时频资源，第二时频资源与第一时频资源的频域资源相同，或者，第二时频资源的频域资源为第一时频资源的频域资源的子集。In a possible implementation manner, the multicast data may be carried on the second time-frequency resource, and the second time-frequency resource is the same as the frequency domain resource of the first time-frequency resource, or the frequency domain resource of the second time-frequency resource is A subset of frequency domain resources of the first time-frequency resource.
也就是说，发送组播数据的频域资源可以与发送SRS的频域资源位置相同。或者，发送组播数据的频域资源可以是发送SRS的频域资源的子集。That is to say, the location of the frequency domain resource for sending multicast data may be the same as that of the frequency domain resource for sending SRS. Alternatively, the frequency domain resource for sending multicast data may be a subset of the frequency domain resource for sending SRS.
示例性的，第一设备为图1中所示的网络设备，网络设备利用物理层组播波束赋形，或者预编码矩阵，向UE1和UE2发送一个组播数据。其中，传输组播数据的频域资源位于UE1的下行带宽部分(Bandwidth Part，BWP)内，同时也位于UE2的下行BWP内。Exemplarily, the first device is the network device shown in FIG. 1 , and the network device sends multicast data to UE1 and UE2 by using physical layer multicast beamforming or precoding matrix. Wherein, the frequency domain resource for transmitting multicast data is located in the downlink bandwidth part (Bandwidth Part, BWP) of UE1, and is also located in the downlink BWP of UE2.
在本申请的上述实施方式中，第一设备可以通过发送SRS对组播信道带宽进行了组播信道测量，而发送组播数据可以占用测量的该组播信道的部分或者全部带宽，从而提高了组播信道互异性利用的有效性，提高组播数据传输的效率，从而提升通信***的数据传输性能。In the above embodiments of the present application, the first device may perform multicast channel measurement on the multicast channel bandwidth by sending SRS, and sending multicast data may occupy part or all of the measured bandwidth of the multicast channel, thereby improving the bandwidth of the multicast channel. The effectiveness of multicast channel heterogeneity utilization improves the efficiency of multicast data transmission, thereby improving the data transmission performance of the communication system.
需要说明的是，如果一个发送侧设备对应于两个组播组(接收侧设备集合)，如第一设备，对应于第一组播组和第二组播组。示例性的，第一组播组包括UE1和UE2，第二组播组包括UE3和UE4。第一设备可以用一个物理层组播波束或者一个预编码矩阵向第一组播组内的UE1和UE2发送第一组播数据。第一设备可以用另一个物理层组播波束或者另一个预编码向第二组播组内的UE3和UE4发送第二组播数据。It should be noted that, if one device on the sending side corresponds to two multicast groups (sets of devices on the receiving side), for example, the first device corresponds to the first multicast group and the second multicast group. Exemplarily, the first multicast group includes UE1 and UE2, and the second multicast group includes UE3 and UE4. The first device may use a physical layer multicast beam or a precoding matrix to send the first multicast data to UE1 and UE2 in the first multicast group. The first device may use another physical layer multicast beam or another precoding to send the second multicast data to UE3 and UE4 in the second multicast group.
在一种实施方式中，本申请的实施方法还可以包括：第一设备可以向至少一个终端设备发送第一控制信息，第一控制信息可以用于指示传输组播数据的时频资源位置。In an implementation manner, the implementation method of the present application may further include: the first device may send first control information to at least one terminal device, and the first control information may be used to indicate a time-frequency resource location for transmitting multicast data.
可选的，第一设备向至少一个终端设备发送第一控制信息可以发生于前述实施方式中的步骤305之前，用于向至少一个终端设备指示第一设备发送组播数据的时频资 源。从而在步骤305之后，至少一个终端设备可以根据至少一个终端设备指示的时频资源位置上，接收来自第一设备的组播数据。Optionally, the sending of the first control information by the first device to at least one terminal device may occur before step 305 in the foregoing implementation manner, and is used to indicate to at least one terminal device the time-frequency resource for the first device to send multicast data. Therefore, after step 305, at least one terminal device can receive the multicast data from the first device according to the time-frequency resource position indicated by the at least one terminal device.
一种可能的方式中，第一设备可以根据物理层组播波束赋形或者预编码矩阵向至少一个终端设备发送第一控制信息。即第一设备通过前述步骤304确定的物理层组播波束赋形或者预编码矩阵，向至少一个终端设备发送第一控制信息。In a possible manner, the first device may send the first control information to at least one terminal device according to physical layer multicast beamforming or a precoding matrix. That is, the first device sends the first control information to at least one terminal device by using the physical layer multicast beamforming or the precoding matrix determined in step 304 above.
上述可能的实施方式，第一设备确定物理层组播波束赋形或者预编码矩阵之后，可以根据物理层组播波束赋形或者预编码矩阵向至少一个终端设备组播发送第一控制信息，例如，第一控制信息具体可以为SCI或者DCI，用于向至少一个终端设备通知传输组播数据的时频资源，从而可以提高第一控制信息的波束覆盖以及通信的有效性。另外，第一设备无需单独向至少一个终端设备发送第一控制信息，还能有效节省信令开销，节约通信资源，提高通信***的效率。In the above possible implementation mode, after the first device determines the physical layer multicast beamforming or precoding matrix, it may multicast and send the first control information to at least one terminal device according to the physical layer multicast beamforming or precoding matrix, for example Specifically, the first control information may be SCI or DCI, which is used to notify at least one terminal device of time-frequency resources for transmitting multicast data, so that the beam coverage of the first control information and the effectiveness of communication can be improved. In addition, the first device does not need to separately send the first control information to at least one terminal device, which can effectively save signaling overhead, save communication resources, and improve the efficiency of the communication system.
或者，在一种可能的方式中，第一设备也可以分别向至少一个终端设备发送第一控制信息，用于指示终端设备如何接收或者译码组播数据。示例性的，第一设备可以向UE1发送第一控制信息，另外，第二设备也向UE2发送第一控制信息。其中，UE1与UE2对应相同的第三控制信息。Or, in a possible manner, the first device may also send first control information to at least one terminal device respectively, so as to instruct the terminal device how to receive or decode the multicast data. Exemplarily, the first device may send the first control information to UE1, and in addition, the second device also sends the first control information to UE2. Wherein, UE1 and UE2 correspond to the same third control information.
接下来，本申请将分别以第一设备为网络设备，或者，第一设备为终端设备的不同情况下，跟别对本申请的实施方式进行详细介绍。Next, the present application will respectively introduce the implementation manners of the present application in detail under different situations where the first device is a network device or the first device is a terminal device.
(1)第一设备为网络设备的情况下：(1) When the first device is a network device:
其中，第一控制信息具体可以为下行链路控制信息(Downlink Control Information，DCI)。Wherein, the first control information may specifically be downlink control information (Downlink Control Information, DCI).
在一种实施方式中，网络设备可以根据物理层组播波束赋形或者预编码矩阵向至少一个终端设备发送DCI。示例性的，如图1所示，网络设备通过一个物理层组播波束发送DCI给UE1和UE2。In an implementation manner, the network device may send DCI to at least one terminal device according to physical layer multicast beamforming or a precoding matrix. Exemplarily, as shown in FIG. 1 , a network device sends DCI to UE1 and UE2 through a physical layer multicast beam.
在一种可能的情况下，该组播传输的DCI可以承载于物理下行控制信道(Physical Downlink Control Channel，PDCCH)。In a possible situation, the DCI transmitted by the multicast may be carried on a physical downlink control channel (Physical Downlink Control Channel, PDCCH).
进一步的，该组播传输的DCI可以包括第一组播组的组标识Group ID。Further, the DCI of the multicast transmission may include the Group ID of the first multicast group.
具体的，网络设备可以通过显示的方式在DCI中指示组标识，例如，网络设备可以在DCI中增加一个组标识指示域，例如，用DCI中的Y比特指示组标识，其中，Y可以为自然数。或者，网络设备还可以通过隐式的方式指示组标识，即可以对组播传输的DCI用Group RNTI进行加扰。从而，只有该Group RNTI对应的接收侧设备才能成功解码该DCI，获取其中的数据。Specifically, the network device can indicate the group identifier in the DCI in a display manner, for example, the network device can add a group identifier indication field in the DCI, for example, use Y bits in the DCI to indicate the group identifier, where Y can be a natural number . Alternatively, the network device may indicate the group identifier implicitly, that is, the DCI transmitted by the multicast may be scrambled with the Group RNTI. Therefore, only the receiving device corresponding to the Group RNTI can successfully decode the DCI and obtain the data therein.
另外，组播传输的DCI中还可以包括一个调制编码方案(Modulation and Coding Scheme，MCS)的指示域，指示一个组播传输MCS。In addition, the DCI of the multicast transmission may also include an indication field of a Modulation and Coding Scheme (MCS), indicating a multicast transmission MCS.
在另一种实施方式中，网络设备也可以分别向至少一个终端设备发送DCI，用于指示终端设备如何接收或者译码组播数据。然后，执行步骤305即网络设备可以根据物理层组播波束赋形或者预编码矩阵向至少一个终端设备发送组播数据，其中，组播数据可以承载于物理下行共享信道(Physical Downlink Shared CHannel，PDSCH)。In another implementation manner, the network device may also send DCI to at least one terminal device respectively, for instructing the terminal device how to receive or decode the multicast data. Then, step 305 is executed, that is, the network device can send multicast data to at least one terminal device according to the physical layer multicast beamforming or precoding matrix, wherein the multicast data can be carried on a physical downlink shared channel (Physical Downlink Shared CHannel, PDSCH ).
示例性的，如图1所示，网络设备发送DCI给UE1，指示UE1如何接收或者译码PDSCH；另外，网络设备发送DCI给UE2，指示UE2如何接收或者译码PDSCH。Exemplarily, as shown in FIG. 1 , the network device sends DCI to UE1 to instruct UE1 how to receive or decode PDSCH; in addition, the network device sends DCI to UE2 to instruct UE2 how to receive or decode PDSCH.
进一步的，网络设备分别向至少一个终端设备发送的DCI中也可以包括第一组播组的组标识Group ID。具体的，网络设备可以通过前述的，显示的或者隐士的方式在DCI中指示组标识，此处对具体的指示方式不再赘述。Further, the DCI sent by the network device to at least one terminal device may also include the Group ID of the first multicast group. Specifically, the network device may indicate the group identifier in the DCI in the aforementioned, explicit or hidden manner, and details of the specific indication manner will not be repeated here.
另外，网络设备分别向至少一个终端设备发送的DCI中还可以包括MCS。In addition, the DCI sent by the network device to at least one terminal device may further include the MCS.
进一步的，在本申请的实施方式中的步骤305中，网络设备可以根据确定的物理层组播波束赋性或者预编码矩阵发送下行的组播数据给至少一个终端设备，如UE1和UE2。Further, in step 305 in the embodiment of the present application, the network device may send downlink multicast data to at least one terminal device, such as UE1 and UE2, according to the determined physical layer multicast beam property or precoding matrix.
其中，网络设备传输下行组播数据的频域资源可以位于UE1的下行BWP内，同时也位于UE2的下行BWP内。Wherein, the frequency domain resource for the network device to transmit the downlink multicast data may be located in the downlink BWP of UE1 and also in the downlink BWP of UE2.
一种可能的方式中，网络设备传输下行组播数据的下行BWP的频域资源位置与至少一个终端设备发送SRS的上行BWP的频域资源位置相同。或者，网络设备传输下行组播数据的下行BWP的频域资源位置是至少一个终端设备发送SRS的上行BWP的频域资源的子集。In a possible manner, the frequency domain resource position of the downlink BWP for the network device to transmit the downlink multicast data is the same as the frequency domain resource position of the uplink BWP for at least one terminal device to send the SRS. Alternatively, the frequency domain resource position of the downlink BWP for the network device to transmit the downlink multicast data is a subset of the frequency domain resources of the uplink BWP for at least one terminal device to send the SRS.
(2)第一设备为终端设备的情况下：(2) When the first device is a terminal device:
其中，第一设备为第一组播中可以用于在侧行链路上发送组播数据的发送侧设备，简称为发送UE。示例性的，可以如图1所示的UE3。Wherein, the first device is a sending-side device that can be used to send multicast data on a sidelink in the first multicast, and is referred to as sending UE for short. Exemplarily, UE3 as shown in FIG. 1 may be used.
此时，第一控制信息具体可以为侧行链路控制信息(Sidelink Control Information，SCI)。At this time, the first control information may specifically be sidelink control information (Sidelink Control Information, SCI).
在一种实施方式中，发送UE可以根据物理层组播波束赋形或者预编码矩阵向至少一个终端设备发送SCI。示例性的，如图1所示，发送UE即UE3可以通过一个物理层组播波束发送一个SCI给UE1和UE2，从而可以节能传输信令。In an implementation manner, the sending UE may send the SCI to at least one terminal device according to physical layer multicast beamforming or a precoding matrix. Exemplarily, as shown in FIG. 1 , UE3, which is the sending UE, may send an SCI to UE1 and UE2 through a physical layer multicast beam, so as to save energy and transmit signaling.
可选的，如图4所示，该组播传输的SCI可以承载于物理侧边链路控制信道(Physical Sidelink Control Channel，PSCCH)。Optionally, as shown in FIG. 4, the SCI of the multicast transmission may be carried on a physical sidelink control channel (Physical Sidelink Control Channel, PSCCH).
在另一种实施方式中，发送UE也可以分别向至少一个终端设备发送SCI，用于指示终端设备如何接收或者译码组播数据。In another implementation manner, the sending UE may also send the SCI to at least one terminal device respectively, for instructing the terminal device how to receive or decode the multicast data.
示例性的，如图4所示，发送UE可以根据物理层组播波束赋形或者预编码矩阵向至少一个终端设备发送组播数据，该组播数据可以承载于物理侧边链路共享信道(Physical Sidelink Shared CHannel，PSSCH)。Exemplarily, as shown in FIG. 4, the sending UE may send multicast data to at least one terminal device according to the physical layer multicast beamforming or precoding matrix, and the multicast data may be carried on the physical side link shared channel ( Physical Sidelink Shared CHannel, PSSCH).
其中，上述的SCI中还可以包括第一组播组的组标识Group ID，以及MCS指示。对于具体的指示方式可以参照前述实施方式中的相关描述，此处不再赘述。Wherein, the above SCI may also include the Group ID of the first multicast group and the MCS indication. For specific indication manners, reference may be made to relevant descriptions in the foregoing implementation manners, and details are not repeated here.
通过上述的实施方式，第一设备可以通过对多个终端设备配置组特定SRS的配置信息，组播组内的至少一个终端设备可以在相同的时频资源上向第一设备发送相同序列的SRS，该相同时频资源上的至少一个SRS对发送侧设备来说可以被视为一个整合的SRS，以实现发送侧设备对组播信道的有效测量，得到组播信道的信道状态信息。从而第一设备可以根据组播信道的信道状态信息确定物理层组播波束赋形或者预编码矩阵，用于向第一组播组中的至少一个终端设备发送组播数据，提高了物理层组播传输对于频谱资源的利用率，尽可能减少了组播业务中的传输资源浪费。Through the above implementation, the first device can configure group-specific SRS configuration information for multiple terminal devices, and at least one terminal device in the multicast group can send the same sequence of SRSs to the first device on the same time-frequency resource , the at least one SRS on the same time-frequency resource can be regarded as an integrated SRS for the sending side device, so as to realize the effective measurement of the multicast channel by the sending side device and obtain the channel state information of the multicast channel. Therefore, the first device can determine the physical layer multicast beamforming or precoding matrix according to the channel state information of the multicast channel, which is used to send multicast data to at least one terminal device in the first multicast group, which improves the physical layer group The utilization rate of spectrum resources for multicast transmission can be minimized, and the waste of transmission resources in multicast services can be reduced as much as possible.
此外，本申请实施例还提供的一种数据发送和接收的方法，具体的，可以基于终端设备的信道状态的反馈信息确定组播信道状态信息。该方法可以应用于第一设备与 至少一个终端设备之间。其中，第一设备可以为网络设备，也可以为终端设备。具体的，如图5所示，该方法可以包括：In addition, the embodiment of the present application also provides a data sending and receiving method, specifically, the multicast channel state information may be determined based on the feedback information of the channel state of the terminal device. The method can be applied between the first device and at least one terminal device. Wherein, the first device may be a network device or a terminal device. Specifically, as shown in Figure 5, the method may include:
501：第一设备向第一组播组中至少一个终端设备发送至少一个第一配置信息，第一配置信息用于指示CSI报告的时频资源。501: The first device sends at least one piece of first configuration information to at least one terminal device in the first multicast group, where the first configuration information is used to indicate time-frequency resources for CSI reporting.
相应地，至少一个终端设备均接收来自第一设备的第一配置信息。Correspondingly, at least one terminal device receives the first configuration information from the first device.
在一种实施方式中，第一配置信息中还可以包括指示第一设备发送CSI-RS的时频资源。或者，第一设备向至少一个终端设备发送第一配置信息之前，向至少一个终端设备发送第二配置信息，所述第二配置信息用于指示第一设备发送CSI-RS的时频资源。In an implementation manner, the first configuration information may further include a time-frequency resource instructing the first device to send the CSI-RS. Alternatively, before sending the first configuration information to at least one terminal device, the first device sends second configuration information to at least one terminal device, where the second configuration information is used to instruct the first device to send the time-frequency resource of the CSI-RS.
需要说明的是，第一设备配置的可以是一种组特定CSI-RS(Group Specific CSI-RS)，即组播信道专用的CSI-RS。具体的，用于指示一个发送侧设备(可以是网络设备，或者终端设备)与至少一个接收侧设备之间的组播信道的信道状态信息的参考信号。其中，组播信道可以用于发送侧设备向至少一个接收侧设备传输组播数据。It should be noted that the first device may be configured with a group-specific CSI-RS (Group Specific CSI-RS), that is, a CSI-RS dedicated to the multicast channel. Specifically, it is a reference signal used to indicate channel state information of a multicast channel between a sending-side device (which may be a network device or a terminal device) and at least one receiving-side device. Wherein, the multicast channel may be used for the sending side device to transmit multicast data to at least one receiving side device.
由此，本申请实施例中的第二配置信息，即CSI-RS配置信息具体可以为组特定CSI-RS对应的配置信息，用于指示第一设备向至少一个终端设备组发送组特定CSI-RS的时频资源位置信息。具体的，组特定CSI-RS的配置信息可以包括时域配置参数以及频域配置参数。Therefore, the second configuration information in the embodiment of the present application, that is, the CSI-RS configuration information may specifically be the configuration information corresponding to the group-specific CSI-RS, which is used to instruct the first device to send the group-specific CSI-RS to at least one terminal device group. Time-frequency resource location information of the RS. Specifically, the configuration information of the group-specific CSI-RS may include time domain configuration parameters and frequency domain configuration parameters.
需要说明的是，在本申请实施例中，第一组播组成组之前，基站或者其他网络设备可以为上述第一组播组的每个终端设备配置对应的RNTI，用于唯一标识该终端设备。例如，UE1对应RNTI1，UE2对应RNTI2。第一组播组成组之后，基站或者其他网络设备可以为上述第一组播组的每个终端设备配置对应的组标识，用于在通信***中标识该第一组播组。例如，UE1对应Group1，UE2也对应Group1。示例性的，如前所述，组标识还可以为组RNTI(Group RNTI)。It should be noted that, in this embodiment of the application, before the first multicast group is formed, the base station or other network equipment may configure a corresponding RNTI for each terminal device of the above-mentioned first multicast group, which is used to uniquely identify the terminal device . For example, UE1 corresponds to RNTI1, and UE2 corresponds to RNTI2. After the first multicast group is formed, the base station or other network equipment may configure a corresponding group identifier for each terminal device of the first multicast group, so as to identify the first multicast group in the communication system. For example, UE1 corresponds to Group1, and UE2 also corresponds to Group1. Exemplarily, as mentioned above, the group identifier may also be a group RNTI (Group RNTI).
在一种实施方式中，第一设备可以向至少一个终端设备发送一个第一配置信息，或者，第二配置信息。In an implementation manner, the first device may send a piece of first configuration information, or second configuration information, to at least one terminal device.
具体的，当该第一设备为网络设备时，该第一配置信息可以承载于RRC消息中，即网络设备可以通过在RRC消息中增加组特定的第一配置信息的指示域。网络设备可以通过下行的组播信道，向至少一个终端设备发送该RRC消息，用于指示第一组播组中至少一个终端设备发送CSI报告的时域资源位置信息。Specifically, when the first device is a network device, the first configuration information may be carried in an RRC message, that is, the network device may add an indication field of the group-specific first configuration information in the RRC message. The network device may send the RRC message to at least one terminal device through a downlink multicast channel, to instruct at least one terminal device in the first multicast group to send time-domain resource location information of the CSI report.
另外，当该第一设备为终端设备时，即第一设备为第一组播组中用于发送组播数据的发送端的终端设备(简称为发送UE)时，该第一配置信息可以承载于PC5 RRC消息中。即发送UE可以通过在PC5 RRC消息中增加第一配置信息的指示域。发送UE可以通过侧行组播信道，向至少一个终端设备发送该PC5 RRC消息，用于指示第一组播组对应的第一配置信息。In addition, when the first device is a terminal device, that is, when the first device is a terminal device (referred to as sending UE for short) used to send multicast data in the first multicast group, the first configuration information may be carried in In PC5 RRC message. That is, the sending UE can add the indication field of the first configuration information in the PC5 RRC message. The sending UE may send the PC5 RRC message to at least one terminal device through a sidelink multicast channel, to indicate the first configuration information corresponding to the first multicast group.
上述这种实施方式适用于第一组播组成组之后，第一设备可以通过一条信令向至少一个终端设备发送第一组播组对应的CSI报告的时域资源位置信息，从而可以有效节省通信信令。The above-mentioned implementation is applicable to after the first multicast group is formed, the first device can send the time-domain resource location information of the CSI report corresponding to the first multicast group to at least one terminal device through a signaling, so that communication can be effectively saved signaling.
同理，第一设备向至少一个终端设备发送第二配置信息的具体实现方式与第一配置信息的类似，具体可以参看上述的相关描述，此处不再赘述。Similarly, the specific implementation manner for the first device to send the second configuration information to at least one terminal device is similar to that of the first configuration information. For details, refer to the above related description, and details will not be repeated here.
在另一种实施方式中，第一设备可以分别向至少一个终端设备中的每个终端设备发送对应的第一配置信息，或者，第二配置信息。In another implementation manner, the first device may respectively send corresponding first configuration information or second configuration information to each of the at least one terminal device.
具体的，当该第一设备为网络设备时，网络设备可以分别向至少一个终端设备中的每个终端设备发送对应的RRC消息。例如，网络设备向UE1发送RRC1，该RRC1包括SRS配置信息；网络设备向UE2发送RRC2，该RRC2包括第一配置信息，或者第二配置信息。其中，每个终端设备对应的第一配置信息/第二配置信息均相同。Specifically, when the first device is a network device, the network device may respectively send a corresponding RRC message to each of the at least one terminal device. For example, the network device sends RRC1 to UE1, where the RRC1 includes SRS configuration information; the network device sends RRC2 to UE2, where the RRC2 includes first configuration information or second configuration information. Wherein, the first configuration information/second configuration information corresponding to each terminal device are the same.
另外，当该第一设备为终端设备时，即第一设备为第一组播组中用于发送组播数据的发送端的终端设备(简称为发送UE)时，发送UE可以分别向至少一个终端设备中的每个终端设备发送对应的PC5 RRC消息。例如，发送UE向接收UE1发送PC5 RRC1，该PC5 RRC1包括第一配置信息，或者第二配置信息。另外，发送UE向接收UE2发送PC5 RRC2，该PC5 RRC2包括，或者第二配置信息。其中，每个接收侧的终端设备如UE1和UE2对应的第一配置信息/第二配置信息均相同。In addition, when the first device is a terminal device, that is, when the first device is a terminal device (referred to as sending UE for short) for sending multicast data in the first multicast group, the sending UE may respectively send at least one terminal device Each end device in the device sends a corresponding PC5 RRC message. For example, the sending UE sends PC5 RRC1 to the receiving UE1, and the PC5 RRC1 includes the first configuration information or the second configuration information. In addition, the sending UE sends PC5 RRC2 to the receiving UE2, and the PC5 RRC2 includes, or the second configuration information. Wherein, the first configuration information/second configuration information corresponding to each terminal device at the receiving side, such as UE1 and UE2, are the same.
上述这种实施方式适用于第一组播组成组之前，第一设备可以通过N条信令分别向N个终端设备发送第一组播组对应的组特定SRS配置信息，其中，N可以为大于1的正整数。The above-mentioned implementation is applicable to before the first multicast group is formed, the first device may send group-specific SRS configuration information corresponding to the first multicast group to N terminal devices through N signaling, where N may be greater than A positive integer of 1.
第一设备分别向所述至少一个终端设备中的每个终端设备发送对应的第一配置信息，所述每个终端设备对应的第一配置信息均相同。The first device respectively sends corresponding first configuration information to each of the at least one terminal device, and the first configuration information corresponding to each terminal device is the same.
在一种实施方式中，第一配置信息可以包括终端设备发送CSI报告的频域资源候选集合的指示，以及终端设备发送CSI报告的时域约束信息。其中，发送CSI报告的频域资源候选集合可以位于第一组播内的至少一个接收侧终端设备的发送BWP的交集上。In an implementation manner, the first configuration information may include an indication of a frequency domain resource candidate set for the terminal device to send the CSI report, and time domain constraint information for the terminal device to send the CSI report. Wherein, the frequency domain resource candidate set for sending the CSI report may be located at the intersection of the sending BWPs of at least one receiving-side terminal device in the first multicast.
具体的，第一配置信息可以包括频域资源的约束参数，即第一配置信息用于指示至少一个终端设备均可以在第一配置信息指示的频域资源的带宽内，向第一设备发送CSI报告。Specifically, the first configuration information may include constraint parameters of frequency domain resources, that is, the first configuration information is used to indicate that at least one terminal device can send CSI to the first device within the bandwidth of the frequency domain resources indicated by the first configuration information. Report.
其中，第一配置信息可以通过隐示的方式指示终端设备发送CSI报告的时域约束。例如，终端设备可以根据协议约定，在时长Z内，向第一设备发送CSI报告。也就是说，终端设备发送CSI报告的时域资源的最大值可以小于或者等于阈值Z。Wherein, the first configuration information may implicitly indicate the time domain constraint for the terminal device to send the CSI report. For example, the terminal device may send the CSI report to the first device within the duration Z according to the agreement. That is to say, the maximum value of time-domain resources for the terminal device to send the CSI report may be less than or equal to the threshold Z.
在另一种实施方式中，第一配置信息可以包括第一时限，第一配置信息用于指示至少一个终端设备可以在第一时限内向所述第一设备发送CSI报告。In another implementation manner, the first configuration information may include a first time limit, and the first configuration information is used to indicate that at least one terminal device may send a CSI report to the first device within the first time limit.
通过上述实施方式，第一设备可以限制组播组中不同终端设备都在预设的时间约束内，同步上报CSI报告，使得第一设备可以根据多个CSI报告反映的信道状态信息确定的组播信道状态信息更加准确，有效提高组播信道的利用率。Through the above implementation, the first device can restrict different terminal devices in the multicast group to report CSI reports synchronously within the preset time constraint, so that the first device can determine the multicast The channel state information is more accurate, which effectively improves the utilization rate of the multicast channel.
502：第一设备向至少一个终端设备发送CSI-RS。502: The first device sends a CSI-RS to at least one terminal device.
具体的，第一设备可以根据前述的第二配置信息中指示的时频资源位置上，向至少一个终端设备发送CSI-RS。相应地，至少一个终端设备均接收来自第一设备的CSI-RS。Specifically, the first device may send the CSI-RS to at least one terminal device according to the time-frequency resource position indicated in the aforementioned second configuration information. Correspondingly, at least one terminal device receives the CSI-RS from the first device.
503：第一组播组中的各个终端设备向第一设备发送CSI报告。503: Each terminal device in the first multicast group sends a CSI report to the first device.
终端设备接收来自第一设备的CSI-RS，通过对CSI-RS的测量获得CSI，再通过CSI报告上报至第一设备。另外，所述至少一个终端设备均根据同一个组播CSI-RS进 行测量，并反馈CSI报告。相应地，第一设备接收来自至少一个终端设备的至少一个CSI报告。The terminal device receives the CSI-RS from the first device, obtains CSI by measuring the CSI-RS, and reports the CSI to the first device through a CSI report. In addition, the at least one terminal device all performs measurement according to the same multicast CSI-RS, and feeds back a CSI report. Correspondingly, the first device receives at least one CSI report from at least one terminal device.
其中，第一组播组内接收端的至少一个终端设备，可以根据前述步骤501中第一配置信息的指示，在相同的时频资源上同步向第一设备上报CSI报告。Wherein, at least one terminal device at the receiving end in the first multicast group may synchronously report a CSI report to the first device on the same time-frequency resource according to the indication of the first configuration information in step 501 above.
在一种实施方式中，终端设备向第一设备上报CSI报告的方式可以是周期性的，即至少一个终端设备均每个一定的时间向第一设备发送CSI报告。In an implementation manner, the manner in which the terminal device reports the CSI report to the first device may be periodic, that is, at least one terminal device sends a CSI report to the first device every certain time.
在这种实施方式下，第一配置信息可以用于指示CSI报告的时频资源的周期和起始时间点。从而至少一个终端设备可以根据第一配置信息的指示，从起始时间点开始，以一定的周期时长向第一设备发送CSI报告。In this implementation manner, the first configuration information may be used to indicate the period and start time point of the time-frequency resource for the CSI report. Therefore, at least one terminal device may send a CSI report to the first device at a certain period of time from the start time point according to the indication of the first configuration information.
示例性的，第一配置信息中CSI报告的时频资源的周期为T，以及发送CSI报告的起始时间点为t1。则至少一个终端设备可以同时在t1时刻开始，每间隔T时长即向第一设备上报一次CSI报告。Exemplarily, the period of the time-frequency resource of the CSI report in the first configuration information is T, and the starting time point of sending the CSI report is t1. Then at least one terminal device may report a CSI report to the first device every T time interval at the same time starting at time t1.
上述可能的实施方式，第一设备可以将终端设备上报CSI报告的方式配置为是周期性的，则第一设备可以通过在第一配置信息中包括终端设备周期性发送CSI报告的时域约束，即发送周期和起始时间点，从而第一设备可以限制组播组中不同终端设备都可以在预设的起始时间，同步上报CSI报告，并以相同的周期上报CSI报告，使得第一设备可以根据多个CSI报告反映的信道状态信息确定的组播信道状态信息的即时性更强，更加准确，有效提高组播信道的利用率。In the above possible implementation mode, the first device may configure the manner in which the terminal device reports the CSI report to be periodic, then the first device may include the time domain constraint that the terminal device periodically sends the CSI report in the first configuration information, That is, the sending cycle and the starting time point, so that the first device can limit that different terminal devices in the multicast group can report the CSI report synchronously at the preset starting time, and report the CSI report at the same period, so that the first device The multicast channel state information that can be determined according to the channel state information reflected by multiple CSI reports is more immediate and accurate, and effectively improves the utilization rate of the multicast channel.
在另一种实施方式中，终端设备向第一设备上报CSI报告的方式可以是半静态的，即在前述的第一设备为至少一个终端设备配置了发送CSI报告的时频资源的周期和起始时间点基础上，终端设备可以根据第一设备的实时指令，触发向第一设备上报CSI报告。In another implementation manner, the manner in which the terminal device reports the CSI report to the first device may be semi-static, that is, after the first device configures at least one terminal device with the period and start time of the time-frequency resource for sending the CSI report Based on the starting time point, the terminal device may trigger reporting of the CSI report to the first device according to the real-time instruction of the first device.
具体的，第一设备可以向至少一个终端设备发送媒体接入控制层(Media AccessControl，MAC)的控制单元(Control Unit，CE)，用于指示至少一个终端设备向第一设备发送CSI报告。Specifically, the first device may send a Media Access Control layer (Media Access Control, MAC) control unit (Control Unit, CE) to at least one terminal device, to instruct at least one terminal device to send a CSI report to the first device.
示例性的，当第一设备为网络设备时，网络设备可以通过RRC消息给组内的终端设备例如UE1和UE2配置相同CSI发送周期，和相同的发送时间起点。此外，网络设备还可以通过一个MAC CE激活组内终端设备向第一设备半静态上报CSI报告。Exemplarily, when the first device is a network device, the network device may configure the terminal devices in the group, such as UE1 and UE2, with the same CSI sending period and the same sending time starting point through an RRC message. In addition, the network device can also activate the terminal device in the group to semi-statically report the CSI report to the first device through a MAC CE.
另外，终端设备向第一设备上报CSI报告的方式还可以是非周期性的。In addition, the manner in which the terminal device reports the CSI report to the first device may also be aperiodic.
此时，第一设备还可以向至少一个终端设备发送第二控制信息，用于指示至少一个终端设备可以向第一设备发送CSI报告。At this time, the first device may also send second control information to at least one terminal device, which is used to indicate that at least one terminal device may send a CSI report to the first device.
其中，第二控制信息具体可以为DCI或者SCI。即第一设备为网络设备时，网络设备可以通过发送DCI用于指示至少一个终端设备上报CSI报告；第一设备为终端设备时，网络设备可以通过发送DCI用于指示至少一个终端设备上报CSI报告。Wherein, the second control information may specifically be DCI or SCI. That is, when the first device is a network device, the network device may send DCI to instruct at least one terminal device to report a CSI report; when the first device is a terminal device, the network device may send DCI to instruct at least one terminal device to report a CSI report .
示例性的，当第一设备为网络设备时，网络设备可以通过一个组播DCI触发组播组内的至少一个终端设备在相同时频资源上向第一设备上报CSI报告。Exemplarily, when the first device is a network device, the network device may use a multicast DCI to trigger at least one terminal device in the multicast group to report a CSI report to the first device on the same time-frequency resource.
在一种实施方式中，CSI报告中可以包括信道质量信息(Channel Quality Information，CQI)、秩指示(Rank Indication，RI)、预编码指示(Precoding Matrix Indication，PMI)以及层指示(Layer Indication，LI)。In one embodiment, the CSI report may include channel quality information (Channel Quality Information, CQI), rank indication (Rank Indication, RI), precoding indication (Precoding Matrix Indication, PMI) and layer indication (Layer Indication, LI ).
504：第一设备根据至少一个CSI报告确定物理层组播波束赋形或者预编码矩阵。504: The first device determines a physical layer multicast beamforming or a precoding matrix according to at least one CSI report.
多个终端设备上报的CSI报告可以用于确定发送侧设备和多个接收侧设备之间的组播信道的信道状态信息。The CSI report reported by multiple terminal devices may be used to determine the channel state information of the multicast channel between the sending side device and multiple receiving side devices.
具体的，第一设备可以根据接收的至少一个终端设备上报的CSI报告，得到组播信道的信道状态信息，再根据得到的组播信道的信道状态信息确定物理层组播波束赋形或者预编码矩阵。涉及到的具体算法可以参照相关的技术实现，本申请对此不做具体限定。Specifically, the first device may obtain the channel state information of the multicast channel according to the received CSI report reported by at least one terminal device, and then determine the physical layer multicast beamforming or precoding according to the obtained channel state information of the multicast channel matrix. The specific algorithms involved can be implemented with reference to related technologies, which is not specifically limited in this application.
505：第一设备根据物理层组播波束赋形或者预编码矩阵向至少一个终端设备发送组播数据。505: The first device sends multicast data to at least one terminal device according to physical layer multicast beamforming or a precoding matrix.
在一种实施方式中，前述步骤502中，第一设备向至少一个终端设备发送的CSI-RS可以承载于第一频域资源，组播数据可以承载于第二频域资源，其中，第二频域资源与第一频域资源相同，或者，第二频域资源为第一频域资源的子集。In one embodiment, in the foregoing step 502, the CSI-RS sent by the first device to at least one terminal device may be carried on the first frequency domain resource, and the multicast data may be carried on the second frequency domain resource, where the second The frequency domain resource is the same as the first frequency domain resource, or the second frequency domain resource is a subset of the first frequency domain resource.
也就是说，发送组播数据的频域资源可以与发送CSI-RS的频域资源位置相同。或者，发送组播数据的频域资源是发送CSI-RS的频域资源的子集。That is to say, the location of the frequency domain resource for sending multicast data may be the same as that of the frequency domain resource for sending CSI-RS. Or, the frequency domain resource for sending multicast data is a subset of the frequency domain resource for sending CSI-RS.
示例性的，当第一设备为图1中所示的终端设备UE3，终端设备UE3可以利用物理层组播波束赋形，或者预编码矩阵，向UE1和UE2发送一个组播数据。其中，传输组播数据的频域资源可以位于UE1的BWP内，同时也位于UE2的BWP内。Exemplarily, when the first device is the terminal device UE3 shown in FIG. 1 , the terminal device UE3 may send multicast data to UE1 and UE2 by using physical layer multicast beamforming or a precoding matrix. Wherein, the frequency domain resource for transmitting the multicast data may be located in the BWP of UE1 and also in the BWP of UE2.
在本申请的上述实施方式中，第一设备可以通过发送CSI-RS和接收的至少一个CSI报告对组播信道带宽进行了组播信道测量，而发送组播数据可以占用已测量的该组播信道的部分或者全部带宽，可以获得频域分集增益，从而提高了组播信道互异性利用的有效性，提高组播数据传输的效率，从而提升通信***的数据传输性能。In the above embodiments of the present application, the first device may perform multicast channel measurement on the multicast channel bandwidth by sending CSI-RS and receiving at least one CSI report, and sending multicast data may occupy the measured multicast channel bandwidth. Part or all of the bandwidth of the channel can obtain frequency domain diversity gain, thereby improving the effectiveness of multicast channel heterogeneity utilization, improving the efficiency of multicast data transmission, and thereby improving the data transmission performance of the communication system.
在一种实施方式中，本申请的实施方法还可以包括：第一设备可以向至少一个终端设备发送第三控制信息，该第三控制信息可以用于指示传输组播数据的时频资源位置。In an implementation manner, the implementation method of the present application may further include: the first device may send third control information to at least one terminal device, where the third control information may be used to indicate a time-frequency resource location for transmitting multicast data.
其中，第一设备向至少一个终端设备发送第三控制信息可以发生于前述实施方式中的步骤505之前，用于向至少一个终端设备指示第一设备发送组播数据的时频资源。从而在步骤505之后，至少一个终端设备可以根据至少一个终端设备指示的时频资源位置上，接收来自第一设备的组播数据。Wherein, the sending of the third control information by the first device to at least one terminal device may occur before step 505 in the foregoing implementation manner, and is used to indicate to at least one terminal device the time-frequency resource for the first device to send multicast data. Therefore, after step 505, at least one terminal device can receive the multicast data from the first device according to the time-frequency resource position indicated by the at least one terminal device.
一种可能的方式中，第一设备可以根据物理层组播波束赋形或者预编码矩阵向至少一个终端设备发送第三控制信息。即第一设备通过前述步骤504确定的物理层组播波束赋形或者预编码矩阵，向至少一个终端设备发送第三控制信息。In a possible manner, the first device may send the third control information to at least one terminal device according to physical layer multicast beamforming or a precoding matrix. That is, the first device sends the third control information to at least one terminal device by using the physical layer multicast beamforming or the precoding matrix determined in step 504 above.
上述可能的实施方式中，第三控制信息具体可以为SCI或者DCI，用于向至少一个终端设备通知传输组播数据的时频资源，从而可以提高第三控制信息的波束覆盖以及通信的有效性。另外，第一设备无需单独向至少一个终端设备组播发送第三控制信息，还能有效节省信令开销，节约通信资源，提高通信***的效率。In the above possible implementation manners, the third control information may specifically be SCI or DCI, which is used to notify at least one terminal device of time-frequency resources for transmitting multicast data, so that the beam coverage of the third control information and the effectiveness of communication can be improved . In addition, the first device does not need to individually multicast and send the third control information to at least one terminal device, which can effectively save signaling overhead, save communication resources, and improve the efficiency of the communication system.
或者，在一种可能的方式中，第一设备也可以分别向至少一个终端设备发送第三控制信息，用于指示终端设备如何接收或者译码组播数据。示例性的，第一设备可以向UE1发送第三控制信息，另外，第二设备也向UE2发送第三控制信息。其中，UE1与UE2对应相同的第三控制信息。Or, in a possible manner, the first device may also send third control information to at least one terminal device respectively, so as to instruct the terminal device how to receive or decode the multicast data. Exemplarily, the first device may send third control information to UE1, and in addition, the second device also sends third control information to UE2. Wherein, UE1 and UE2 correspond to the same third control information.
与前述基于信道互异性确定组播信道状态信息的实施例相似，在第一设备为网络设备的情况下，其中，第三控制信息具体可以为DCI。在第一设备为终端设备的情况下，即第一设备为第一组播中可以用于在侧行链路上发送组播数据的发送侧设备，此时，第三控制信息具体可以为SCI。Similar to the aforementioned embodiment of determining multicast channel state information based on channel mutuality, in the case where the first device is a network device, the third control information may specifically be DCI. In the case where the first device is a terminal device, that is, the first device is a sending side device that can be used to send multicast data on the sidelink in the first multicast, at this time, the third control information may specifically be SCI .
接下来，对此分别进行介绍。Next, each of these will be introduced.
(1)第一设备为网络设备的情况下：(1) When the first device is a network device:
在一种实施方式中，网络设备可以根据物理层组播波束赋形或者预编码矩阵向至少一个终端设备发送DCI。示例性的，如图1所示，网络设备通过一个物理层组播波束发送DCI给UE1和UE2。In an implementation manner, the network device may send DCI to at least one terminal device according to physical layer multicast beamforming or a precoding matrix. Exemplarily, as shown in FIG. 1 , a network device sends DCI to UE1 and UE2 through a physical layer multicast beam.
其中，该组播传输的DCI可以承载于PDCCH。然后，可以执行步骤505，即网络设备可以根据物理层组播波束赋形或者预编码矩阵向至少一个终端设备发送组播数据。结合图6所示，其中，组播数据可以承载于物理下行共享信道PDSCH。Wherein, the DCI transmitted by the multicast may be carried on the PDCCH. Then, step 505 may be performed, that is, the network device may send multicast data to at least one terminal device according to the physical layer multicast beamforming or the precoding matrix. As shown in FIG. 6 , the multicast data may be carried on the physical downlink shared channel PDSCH.
在另一种实施方式中，网络设备也可以分别向至少一个终端设备发送DCI，用于指示终端设备如何接收或者译码组播数据。In another implementation manner, the network device may also send DCI to at least one terminal device respectively, for instructing the terminal device how to receive or decode the multicast data.
示例性的，如图1所示，网络设备发送DCI给UE1，指示UE1如何接收或者译码PDSCH；另外，网络设备发送DCI给UE2，指示UE2如何接收或者译码PDSCH。Exemplarily, as shown in FIG. 1 , the network device sends DCI to UE1 to instruct UE1 how to receive or decode PDSCH; in addition, the network device sends DCI to UE2 to instruct UE2 how to receive or decode PDSCH.
进一步的，该组播传输的DCI可以包括第一组播组的组标识Group ID。网络设备分别向至少一个终端设备发送的DCI中也可以包括第一组播组的组标识Group ID。参考前述的组标识指示方式可以包括显示的或者隐式进行指示，此处不再赘述。Further, the DCI of the multicast transmission may include the Group ID of the first multicast group. The DCI sent by the network device to at least one terminal device may also include the Group ID of the first multicast group. Referring to the foregoing group identifier indication manner may include explicit or implicit indication, which will not be repeated here.
另外，组播传输的DCI中还可以包括MCS指示。网络设备分别向至少一个终端设备发送的DCI中还可以包括MCS。In addition, the DCI of the multicast transmission may also include an MCS indication. The DCI sent by the network device to at least one terminal device may further include the MCS.
进一步的，在本申请的实施方式中的步骤505中，网络设备可以根据确定的物理层组播波束赋性或者预编码矩阵发送下行的组播数据给至少一个终端设备，如UE1和UE2。Further, in step 505 in the embodiment of the present application, the network device may send downlink multicast data to at least one terminal device, such as UE1 and UE2, according to the determined physical layer multicast beam property or precoding matrix.
其中，网络设备传输下行组播数据的频域资源可以位于UE1的下行BWP内，同时也位于UE2的下行BWP内。Wherein, the frequency domain resource for the network device to transmit the downlink multicast data may be located in the downlink BWP of UE1 and also in the downlink BWP of UE2.
(2)第一设备为终端设备的情况下：(2) When the first device is a terminal device:
其中，第一设备为第一组播中可以用于在侧行链路上发送组播数据的发送侧设备，简称为发送UE。示例性的，可以如图1所示的UE3。Wherein, the first device is a sending-side device that can be used to send multicast data on a sidelink in the first multicast, and is referred to as sending UE for short. Exemplarily, UE3 as shown in FIG. 1 may be used.
此时，在一种实施方式中，发送UE可以根据物理层组播波束赋形或者预编码矩阵向至少一个终端设备发送SCI。示例性的，如图1所示，发送UE即UE3可以通过一个物理层组播波束发送一个SCI给UE1和UE2，从而可以节能传输信令。At this time, in an implementation manner, the sending UE may send the SCI to at least one terminal device according to physical layer multicast beamforming or a precoding matrix. Exemplarily, as shown in FIG. 1 , UE3, which is the sending UE, may send an SCI to UE1 and UE2 through a physical layer multicast beam, so as to save energy and transmit signaling.
其中，如图7所示，该组播传输的SCI可以承载于PSCCH。Wherein, as shown in FIG. 7 , the SCI of the multicast transmission may be carried on the PSCCH.
在另一种实施方式中，发送UE也可以分别向至少一个终端设备发送SCI，用于指示终端设备如何接收或者译码组播数据。In another implementation manner, the sending UE may also send the SCI to at least one terminal device respectively, for instructing the terminal device how to receive or decode the multicast data.
然后，如图7所示，发送UE可以根据物理层组播波束赋形或者预编码矩阵向至少一个终端设备发送组播数据，该组播数据可以承载于PSSCH。Then, as shown in FIG. 7 , the sending UE can send multicast data to at least one terminal device according to the physical layer multicast beamforming or precoding matrix, and the multicast data can be carried on the PSSCH.
其中，上述的SCI中还可以包括第一组播组的组标识Group ID，以及MCS指示。对于具体的指示方式可以参照前述实施方式中的相关描述，此处不再赘述。Wherein, the above SCI may also include the Group ID of the first multicast group and the MCS indication. For specific indication manners, reference may be made to relevant descriptions in the foregoing implementation manners, and details are not repeated here.
通过上述的实施方式，第一设备可以通过为组播信道配置特定的CSI报告的配置信息，从而可以根据不同终端设备反馈的CSI报告获取一个发送侧设备和多个接收侧设备之间的组播信道的信道状态信息，从而根据组播信道的信道状态信息确定适合组播传输的物理层组播波束赋性或者预编码矩阵，用于发送组播数据，提高了物理层组播传输对于频谱资源的利用率，尽可能减少了组播业务中的传输资源浪费。。Through the above implementation, the first device can configure specific CSI report configuration information for the multicast channel, so that it can obtain the multicast between one sending side device and multiple receiving side devices according to the CSI reports fed back by different terminal devices The channel state information of the channel, so as to determine the physical layer multicast beam property or precoding matrix suitable for multicast transmission according to the channel state information of the multicast channel, which is used to send multicast data, which improves the efficiency of physical layer multicast transmission for spectrum resources The utilization rate reduces the waste of transmission resources in the multicast service as much as possible. .
基于上述本申请提供的基于信道互异性确定信道状态信息的实施方式，本申请提供一种通信装置，用于实现上述实施方式中第一设备执行的步骤。如图8所示，该通信装置800可以包括：发送模块801、接收模块802和处理模块803。Based on the implementation of determining channel state information based on channel mutuality provided in the above application, the application provides a communication device configured to implement the steps performed by the first device in the above implementation. As shown in FIG. 8 , the communication device 800 may include: a sending module 801 , a receiving module 802 and a processing module 803 .
其中，发送模块801可以用于向第一组播组中至少一个终端设备发送信道探测参考信号SRS配置信息，SRS配置信息指示用于发送SRS的第一时频资源、SRS的序列和用于发送SRS的天线端口。Wherein, the sending module 801 may be configured to send channel sounding reference signal SRS configuration information to at least one terminal device in the first multicast group, and the SRS configuration information indicates the first time-frequency resource used for sending SRS, the sequence of SRS and the configuration information used for sending SRS. Antenna port for SRS.
接收模块802可以用于在第一时频资源上接收来自至少一个终端设备的至少一个SRS，并基于至少一个SRS确定组播信道状态信息，其中，承载至少一个SRS的时频资源相同，且至少一个SRS的序列相同。The receiving module 802 may be configured to receive at least one SRS from at least one terminal device on a first time-frequency resource, and determine multicast channel state information based on the at least one SRS, wherein the time-frequency resources carrying the at least one SRS are the same, and at least The sequence of an SRS is the same.
处理模块803可以用于根据组播信道状态信息确定物理层组播波束赋形或者预编码矩阵。The processing module 803 may be configured to determine a physical layer multicast beamforming or a precoding matrix according to the multicast channel state information.
发送模块801还可以还用于根据物理层组播波束赋形或者预编码矩阵向至少一个终端设备发送组播数据。The sending module 801 may also be configured to send multicast data to at least one terminal device according to physical layer multicast beamforming or a precoding matrix.
在一种实施方式中，至少一个SRS是通过相同的天线端口发送的。In one embodiment, at least one SRS is transmitted through the same antenna port.
在一种实施方式中，接收模块802还用于接收来自至少一个终端设备的至少一个天线端口指示信息，天线端口指示信息用于指示对应终端设备的天线端口数量，或者，对应终端设备的天线端口索引的集合。In one embodiment, the receiving module 802 is further configured to receive at least one antenna port indication information from at least one terminal device, where the antenna port indication information is used to indicate the number of antenna ports of the corresponding terminal device, or the antenna port of the corresponding terminal device A collection of indices.
处理模块803还用于根据至少一个天线端口指示信息确定用于发送SRS的天线端口。The processing module 803 is further configured to determine an antenna port used for sending the SRS according to at least one antenna port indication information.
在一种实施方式中，发送模块801还用于根据物理层组播波束赋形或者预编码矩阵向至少一个终端设备发送第一控制信息，第一控制信息用于指示组播数据的时频资源，其中，第一控制信息还包括第一组播组的组标识。In one embodiment, the sending module 801 is further configured to send first control information to at least one terminal device according to the physical layer multicast beamforming or precoding matrix, where the first control information is used to indicate the time-frequency resource of the multicast data , wherein the first control information further includes the group identifier of the first multicast group.
在一种实施方式中，组播数据承载于第二时频资源，其中，第二时频资源与第一时频资源的频域资源相同，或者，第二时频资源的频域资源为第一时频资源的频域资源的子集。In one embodiment, the multicast data is carried on the second time-frequency resource, where the second time-frequency resource is the same as the frequency domain resource of the first time-frequency resource, or the frequency domain resource of the second time-frequency resource is the same as the frequency domain resource of the first time-frequency resource. A subset of frequency domain resources of a time-frequency resource.
在一种实施方式中，该通信装置800可以为网络设备，或者该通信装置800还可以为第一组播组中一个终端设备。In an implementation manner, the communication apparatus 800 may be a network device, or the communication apparatus 800 may also be a terminal device in the first multicast group.
在一种实施方式中，发送模块801还可以还用于向至少一个终端设备发送一个SRS配置信息，或者，发送模块801还可以用于分别向至少一个终端设备中的每个终端设备发送对应的SRS配置信息，每个终端设备对应的SRS配置信息均相同。In an implementation manner, the sending module 801 may also be configured to send a piece of SRS configuration information to at least one terminal device, or the sending module 801 may also be configured to send the corresponding SRS configuration information to each of the at least one terminal device respectively. SRS configuration information, the SRS configuration information corresponding to each terminal device is the same.
本申请还提供一种通信装置，用于实现上述实施方式中终端设备执行的步骤。如图9所示，该通信装置900可以包括接收模块901和发送模块902。The present application also provides a communication device, which is used to implement the steps performed by the terminal device in the foregoing embodiments. As shown in FIG. 9 , the communication device 900 may include a receiving module 901 and a sending module 902 .
其中，接收模块901可以用于接收来自第一设备的信道探测参考信号SRS配置信息，SRS配置信息指示用于发送SRS的第一时频资源、SRS的序列和用于发送SRS的 天线端口。Wherein, the receiving module 901 may be configured to receive channel sounding reference signal SRS configuration information from the first device, and the SRS configuration information indicates the first time-frequency resource used for sending SRS, the sequence of SRS and the antenna port used for sending SRS.
发送模块902可以用于在第一时频资源上向第一设备发送SRS，SRS用于第一设备根据至少一个SRS确定第一组播组的组播信道状态信息。The sending module 902 may be configured to send an SRS to the first device on the first time-frequency resource, where the SRS is used by the first device to determine multicast channel state information of the first multicast group according to at least one SRS.
接收模块901还可以用于接收来自第一设备的组播数据，组播数据是第一设备根据物理层组播波束赋形或者预编码矩阵发送的，物理层组播波束赋形或者预编码矩阵是第一设备根据组播信道状态信息确定的。The receiving module 901 may also be configured to receive multicast data from the first device, the multicast data is sent by the first device according to the physical layer multicast beamforming or precoding matrix, the physical layer multicast beamforming or precoding matrix It is determined by the first device according to the state information of the multicast channel.
在一种实施方式中，SRS是通过预设的天线端口发送的，或者，SRS是通过SRS配置信息中指示的天线端口发送的。In an implementation manner, the SRS is sent through a preset antenna port, or the SRS is sent through an antenna port indicated in the SRS configuration information.
在一种实施方式中，发送模块902还可以用于向第一设备发送天线端口指示信息，天线端口指示信息用于指示该通信装置900的天线端口数量，或者，该通信装置900的天线端口索引的集合；天线端口指示信息用于第一设备确定用于发送SRS的天线端口。In one embodiment, the sending module 902 may also be configured to send antenna port indication information to the first device, where the antenna port indication information is used to indicate the number of antenna ports of the communication apparatus 900, or the antenna port index of the communication apparatus 900 A collection of ; the antenna port indication information is used for the first device to determine the antenna port used to send the SRS.
在一种实施方式中，接收模块901还可以用于接收来自第一设备的第一控制信息，第一控制信息用于指示组播数据的时频资源，其中，第一控制信息还包括第一组播组的组标识，第一控制信息是第一设备根据物理层组播波束赋形或者预编码矩阵发送的。In an implementation manner, the receiving module 901 may also be configured to receive first control information from the first device, where the first control information is used to indicate the time-frequency resource of the multicast data, where the first control information further includes the first The group identifier of the multicast group, and the first control information is sent by the first device according to the physical layer multicast beamforming or precoding matrix.
在一种实施方式中，组播数据承载于第二时频资源，其中，第二时频资源与第一时频资源的频域资源相同，或者，第二时频资源的频域资源为第一时频资源的频域资源的子集。In one embodiment, the multicast data is carried on the second time-frequency resource, where the second time-frequency resource is the same as the frequency domain resource of the first time-frequency resource, or the frequency domain resource of the second time-frequency resource is the same as the frequency domain resource of the first time-frequency resource. A subset of frequency domain resources of a time-frequency resource.
在一种实施方式中，第一设备为网络设备，或者第一设备为第一组播组中一个终端设备。In an implementation manner, the first device is a network device, or the first device is a terminal device in the first multicast group.
另外，基于上述本申请提供的基于CSI反馈确定信道状态信息的实施方式，本申请还提供一种通信装置，用于实现上述实施方式中第一设备执行的步骤。如图8所示，该通信装置800可以包括：发送模块801、接收模块802和处理模块803。In addition, based on the implementation of determining channel state information based on CSI feedback provided in the above application, the application further provides a communication device, configured to implement the steps performed by the first device in the above implementation. As shown in FIG. 8 , the communication device 800 may include: a sending module 801 , a receiving module 802 and a processing module 803 .
其中，发送模块801可以用于向第一组播组中至少一个终端设备发送至少一个第一配置信息，第一配置信息用于指示信道状态信息CSI报告的时频资源；发送模块801还可以用于向至少一个终端设备发送信道状态信息参考信号CSI-RS。Wherein, the sending module 801 can be configured to send at least one first configuration information to at least one terminal device in the first multicast group, and the first configuration information is used to indicate the time-frequency resource of the channel state information CSI report; the sending module 801 can also use To send a channel state information reference signal CSI-RS to at least one terminal device.
接收模块802可以用于接收来自至少一个终端设备的至少一个CSI报告。The receiving module 802 may be configured to receive at least one CSI report from at least one terminal device.
处理模块803可以用于根据至少一个CSI报告确定物理层组播波束赋形或者预编码矩阵。The processing module 803 may be configured to determine a physical layer multicast beamforming or a precoding matrix according to at least one CSI report.
发送模块801还可以用于根据物理层组播波束赋形或者预编码矩阵向至少一个终端设备发送组播数据。The sending module 801 may also be configured to send multicast data to at least one terminal device according to physical layer multicast beamforming or a precoding matrix.
在一种实施方式中，第一配置信息包括第一时限，第一配置信息用于指示至少一个终端设备在第一时限内发送CSI报告。In an implementation manner, the first configuration information includes a first time limit, and the first configuration information is used to instruct at least one terminal device to send a CSI report within the first time limit.
在一种实施方式中，第一配置信息用于指示信道状态信息CSI报告的时频资源的周期和起始时间点。In an implementation manner, the first configuration information is used to indicate a period and a starting time point of the time-frequency resource reported by the channel state information (CSI).
在一种实施方式中，发送模块801还可以用于向至少一个终端设备发送媒体接入控制层的控制单元MAC CE，用于指示至少一个终端设备向该通信装置发送CSI报告。In an implementation manner, the sending module 801 may also be configured to send a control element MAC CE of the media access control layer to at least one terminal device, for instructing at least one terminal device to send a CSI report to the communication device.
在一种实施方式中，发送模块801还可以用于向至少一个终端设备发送第二控制信息，用于指示至少一个终端设备向该通信装置发送CSI报告。In an implementation manner, the sending module 801 may also be configured to send second control information to at least one terminal device, for instructing at least one terminal device to send a CSI report to the communication apparatus.
在一种实施方式中，发送模块801还可以用于根据物理层组播波束赋形或者预编码矩阵向至少一个终端设备发送第三控制信息，第三控制信息用于指示组播数据的时频资源，其中，第三控制信息还包括第一组播组的组标识。In one embodiment, the sending module 801 may also be configured to send third control information to at least one terminal device according to the physical layer multicast beamforming or precoding matrix, where the third control information is used to indicate the time-frequency of the multicast data resources, wherein the third control information further includes the group identifier of the first multicast group.
在一种实施方式中，CSI-RS承载于第一频域资源，组播数据承载于第二频域资源，其中，第二频域资源与第一频域资源相同，或者，第二频域资源为第一频域资源的子集。In one embodiment, the CSI-RS is borne on a first frequency domain resource, and the multicast data is borne on a second frequency domain resource, where the second frequency domain resource is the same as the first frequency domain resource, or the second frequency domain resource The resources are a subset of the first frequency domain resources.
在一种实施方式中，该通信装置800可以为网络设备，或者通信装置800还可以为第一组播组中一个终端设备。In an implementation manner, the communication apparatus 800 may be a network device, or the communication apparatus 800 may also be a terminal device in the first multicast group.
在一种实施方式中，发送模块801可以用于向至少一个终端设备发送一个第一配置信息，或者，发送模块801可以用于分别向至少一个终端设备中的每个终端设备发送对应的第一配置信息，每个终端设备对应的第一配置信息均相同。In an implementation manner, the sending module 801 may be configured to send a piece of first configuration information to at least one terminal device, or the sending module 801 may be configured to send corresponding first configuration information to each of the at least one terminal device respectively. For the configuration information, the first configuration information corresponding to each terminal device is the same.
本申请还提供一种通信装置，用于实现上述实施方式中终端设备执行的步骤。如图8所示，该通信装置800可以包括：发送模块801、接收模块802和处理模块803。The present application also provides a communication device, which is used to implement the steps performed by the terminal device in the foregoing embodiments. As shown in FIG. 8 , the communication device 800 may include: a sending module 801 , a receiving module 802 and a processing module 803 .
其中，接收模块802可以用于接收来自第一设备的第一配置信息，第一配置信息用于指示信道状态信息CSI报告的时频资源；接收模块802还可以用于接收来自第一设备的信道状态信息参考信号CSI-RS。Among them, the receiving module 802 can be used to receive the first configuration information from the first device, the first configuration information is used to indicate the time-frequency resource of the channel state information CSI report; the receiving module 802 can also be used to receive the channel information from the first device Status Information Reference Signal CSI-RS.
处理模块803可以用于根据CSI-RS向第一设备发送CSI报告，CSI报告用于第一设备根据至少一个CSI报告确定第一组播组的组播信道状态信息。The processing module 803 may be configured to send a CSI report to the first device according to the CSI-RS, where the CSI report is used for the first device to determine multicast channel state information of the first multicast group according to at least one CSI report.
接收模块802还可以用于接收来自第一设备的组播数据，组播数据是第一设备根据物理层组播波束赋形或者预编码矩阵发送的，物理层组播波束赋形或者预编码矩阵是第一设备根据组播信道状态信息确定的。The receiving module 802 may also be configured to receive multicast data from the first device, the multicast data is sent by the first device according to the physical layer multicast beamforming or precoding matrix, and the physical layer multicast beamforming or precoding matrix It is determined by the first device according to the state information of the multicast channel.
在一种实施方式中，第一配置信息包括第一时限，第一配置信息用于指示该通信装置在第一时限内发送CSI报告。In an implementation manner, the first configuration information includes a first time limit, and the first configuration information is used to instruct the communication device to send the CSI report within the first time limit.
在一种实施方式中，第一配置信息用于指示该通信装置发送CSI报告的时频资源的周期和起始时间点。In an implementation manner, the first configuration information is used to indicate the period and the starting time point of the time-frequency resource for sending the CSI report by the communication device.
在一种实施方式中，接收模块802还用于接收来自第一设备的媒体接入控制层的控制单元MAC CE；发送模块801还用于根据MAC CE向第一设备发送CSI报告。In one embodiment, the receiving module 802 is further configured to receive a control unit MAC CE from the media access control layer of the first device; the sending module 801 is further configured to send a CSI report to the first device according to the MAC CE.
在一种实施方式中，接收模块802还用于接收来自第一设备的第二控制信息；发送模块801还用于第二控制信息向第一设备发送CSI报告。In one implementation manner, the receiving module 802 is further configured to receive second control information from the first device; the sending module 801 is further configured to send the second control information to the first device a CSI report.
在一种实施方式中，接收模块802还用于接收来自第一设备的第三控制信息，第三控制信息用于指示组播数据的时频资源，其中，第三控制信息还包括第一组播组的组标识，第三控制信息是第一设备根据物理层组播波束赋形或者预编码矩阵发送的。In one embodiment, the receiving module 802 is further configured to receive third control information from the first device, the third control information is used to indicate the time-frequency resources of the multicast data, wherein the third control information also includes the first group The group identifier of the broadcast group, and the third control information is sent by the first device according to the physical layer multicast beamforming or precoding matrix.
在一种实施方式中，CSI-RS承载于第一频域资源，组播数据承载于第二频域资源，其中，第二频域资源与第一频域资源相同，或者，第二频域资源为第一频域资源的子集。In one embodiment, the CSI-RS is borne on a first frequency domain resource, and the multicast data is borne on a second frequency domain resource, where the second frequency domain resource is the same as the first frequency domain resource, or the second frequency domain resource The resources are a subset of the first frequency domain resources.
在一种实施方式中，第一设备为网络设备，或者第一设备为第一组播组中一个终端设备。In an implementation manner, the first device is a network device, or the first device is a terminal device in the first multicast group.
需要说明的是，上述通信装置中具体的执行过程和实施例可以参照上述方法实施例中第一设备或者终端设备执行的步骤和相关的描述，所解决的技术问题和带来的技 术效果也可以参照前述实施例所述的内容，此处不再一一赘述。It should be noted that, for the specific execution process and embodiments of the communication device above, reference may be made to the steps performed by the first device or the terminal device and related descriptions in the above method embodiments, and the technical problems to be solved and the technical effects brought about may also be With reference to the content described in the foregoing embodiments, details are not repeated here one by one.
在本实施例中，该通信装置可以采用集成的方式划分各个功能模块的形式来呈现。这里的“模块”可以指特定电路、执行一个或多个软件或固件程序的处理器和存储器、集成逻辑电路、和/或其他可以提供上述功能的器件。在一个简单的实施例中，本领域的技术人员可以想到该通信装置可以采用如前述中的图2所示的形式。In this embodiment, the communication device may be presented in the form of dividing various functional modules in an integrated manner. A "module" here may refer to a specific circuit, a processor and memory executing one or more software or firmware programs, an integrated logic circuit, and/or other devices that can provide the above functions. In a simple embodiment, those skilled in the art can imagine that the communication device can take the form shown in FIG. 2 in the foregoing.
示例性的，图8中的处理模块803的功能/实现过程可以通过图2中的处理器201调用存储器203中存储的计算机程序指令来实现。例如，图8中发送模块801和接收模块802的功能/实现过程可以通过图2中的通信接口204来实现。图9中接收模块901和发送模块902的功能/实现过程可以通过图2中的通信接口204来实现。Exemplarily, the function/implementation process of the processing module 803 in FIG. 8 may be implemented by calling the computer program instructions stored in the memory 203 by the processor 201 in FIG. 2 . For example, the functions/implementation process of the sending module 801 and the receiving module 802 in FIG. 8 may be implemented through the communication interface 204 in FIG. 2 . The functions/implementation process of the receiving module 901 and the sending module 902 in FIG. 9 can be realized through the communication interface 204 in FIG. 2 .
在一些实施方式中，图2中的处理器201可以通过调用存储器203中存储的计算机执行指令，使得装置200可以执行上述各个方法实施例中的第一设备或者终端设备执行的操作，实现本申请的上述各个可能的实施方法。In some implementations, the processor 201 in FIG. 2 can call the computer-executed instructions stored in the memory 203, so that the apparatus 200 can perform the operations performed by the first device or the terminal device in the above-mentioned various method embodiments, and implement the present application. Each of the above possible implementation methods.
上述各个装置实施例中的通信组装置可以与方法实施例中的第一设备或者终端设备完全对应，由相应的模块或者单元执行相应的步骤，例如，当该装置以芯片的方式实现时，该通信单元可以是该芯片用于从其他芯片或者装置接收信号的接口电路。以上用于发送或接收的通信单元是一种该装置的接口电路，用于向其他装置发送信号，例如，当该装置以芯片的方式实现时，该通信单元可以是用于向其他芯片或者装置发送信号的接口电路。The communication group device in each of the above device embodiments may completely correspond to the first device or terminal device in the method embodiment, and the corresponding steps are performed by corresponding modules or units. For example, when the device is implemented in the form of a chip, the The communication unit may be an interface circuit for the chip to receive signals from other chips or devices. The above communication unit for sending or receiving is an interface circuit of the device, used to send signals to other devices, for example, when the device is implemented in the form of a chip, the communication unit can be used to send signals to other chips or devices Interface circuit for sending signals.
在示例性实施例中，还提供了一种包括指令的计算机可读存储介质，或者计算机程序产品，上述指令可由通信装置200的处理器201执行以完成上述实施例的方法。因此其所能获得的技术效果可参考上述方法实施例，在此不再赘述。In an exemplary embodiment, a computer-readable storage medium including instructions, or a computer program product is also provided, and the above-mentioned instructions can be executed by the processor 201 of the communication device 200 to implement the methods of the above-mentioned embodiments. Therefore, the technical effects that can be obtained can refer to the above-mentioned method embodiments, and will not be repeated here.
本申请还提供了一种计算机程序产品，该计算机程序产品包括指令，当该指令被执行时，以使得该计算机分别可以执行对应于上述方法的第一设备或者终端设备执行的操作。The present application also provides a computer program product. The computer program product includes instructions. When the instructions are executed, the computer can respectively perform operations performed by the first device or the terminal device corresponding to the above method.
本申请实施例还提供了一种***芯片，该***芯片包括：处理单元和通信单元，该处理单元，例如可以是处理器，该通信单元例如可以是输入/输出接口、管脚或电路等。该处理单元可执行计算机指令，以使该芯片所应用的通信装置执行上述本申请实施例提供的方法中的第一设备或者终端设备执行的操作。The embodiment of the present application also provides a system chip. The system chip includes: a processing unit and a communication unit. The processing unit may be, for example, a processor, and the communication unit may be, for example, an input/output interface, a pin, or a circuit. The processing unit may execute computer instructions, so that the communication device to which the chip is applied executes the operations performed by the first device or the terminal device in the method provided by the above embodiments of the present application.
可选地，上述本申请实施例中提供的任意一种通信装置可以包括该***芯片。Optionally, any communication device provided in the foregoing embodiments of the present application may include the system chip.
可选地，该计算机指令被存储在存储单元中。Optionally, the computer instructions are stored in a storage unit.
本申请实施例还提供了一种通信***，该通信***可以包括：上述的实施方式中的任一种第一设备和至少一个终端设备。An embodiment of the present application further provides a communication system, and the communication system may include: any first device in the foregoing implementation manners and at least one terminal device.
在上述实施例中，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。当使用软件程序实现时，可以全部或部分地以计算机程序产品的形式来实现。该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计算机程序指令时，全部或部分地产生按照本申请实施例的流程或功能。计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。In the above embodiments, all or part of them may be implemented by software, hardware, firmware or any combination thereof. When implemented using a software program, 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. 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. A computer can be a general purpose computer, special purpose computer, computer network, or other programmable device.
本领域技术人员在考虑说明书及实践这里公开的发明后，将容易想到本申请的其它实施方案。本申请旨在涵盖本申请的任何变型、用途或者适应性变化，这些变型、 用途或者适应性变化遵循本申请的一般性原理并包括本申请未公开的本技术领域中的公知常识或惯用技术手段。Other embodiments of the present application will be readily apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any modification, use or adaptation of the application, which follows the general principles of the application and includes common knowledge or conventional technical means in the technical field not disclosed in the application .
最后应说明的是：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，任何在本申请揭露的技术范围内的变化或替换，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。Finally, it should be noted that: the above is only a specific implementation of the application, but the protection scope of the application is not limited thereto, and any changes or replacements within the technical scope disclosed in the application shall be covered by this application. within the scope of the application. Therefore, the protection scope of the present application should be determined by the protection scope of the claims.

Claims (30)

  1. 一种数据发送方法，其特征在于，所述方法包括：A method for sending data, characterized in that the method comprises:
    第一设备向第一组播组中至少一个终端设备发送信道探测参考信号SRS配置信息，所述SRS配置信息指示用于发送SRS的第一时频资源、SRS的序列和用于发送SRS的天线端口；The first device sends channel sounding reference signal SRS configuration information to at least one terminal device in the first multicast group, where the SRS configuration information indicates the first time-frequency resource used to send the SRS, the sequence of the SRS, and the antenna used to send the SRS port;
    所述第一设备在所述第一时频资源上接收来自所述至少一个终端设备的至少一个SRS，并基于所述至少一个SRS确定组播信道状态信息，其中，承载所述至少一个SRS的时频资源相同，且所述至少一个SRS的序列相同；The first device receives at least one SRS from the at least one terminal device on the first time-frequency resource, and determines multicast channel state information based on the at least one SRS, wherein the at least one SRS carrying the The time-frequency resources are the same, and the sequence of the at least one SRS is the same;
    所述第一设备根据所述组播信道状态信息确定物理层组播波束赋形或者预编码矩阵；The first device determines a physical layer multicast beamforming or a precoding matrix according to the multicast channel state information;
    所述第一设备根据所述物理层组播波束赋形或者所述预编码矩阵向所述至少一个终端设备发送组播数据。The first device sends multicast data to the at least one terminal device according to the physical layer multicast beamforming or the precoding matrix.
  2. 根据权利要求1所述的方法，其特征在于，所述至少一个SRS是通过相同的天线端口发送的。The method according to claim 1, wherein the at least one SRS is transmitted through the same antenna port.
  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：The method according to claim 1 or 2, characterized in that the method further comprises:
    所述第一设备接收来自所述至少一个终端设备的至少一个天线端口指示信息，所述天线端口指示信息用于指示对应终端设备的天线端口数量，或者，所述对应终端设备的天线端口索引的集合；The first device receives at least one antenna port indication information from the at least one terminal device, where the antenna port indication information is used to indicate the number of antenna ports of the corresponding terminal device, or the index of the antenna port of the corresponding terminal device gather;
    所述第一设备根据所述至少一个天线端口指示信息确定所述用于发送SRS的天线端口。The first device determines the antenna port used for sending the SRS according to the at least one antenna port indication information.
  4. 根据权利要求1-3任一项所述的方法，其特征在于，所述方法还包括：The method according to any one of claims 1-3, wherein the method further comprises:
    所述第一设备根据所述物理层组播波束赋形或者所述预编码矩阵向所述至少一个终端设备发送第一控制信息，所述第一控制信息用于指示所述组播数据的时频资源，其中，所述第一控制信息还包括所述第一组播组的组标识。The first device sends first control information to the at least one terminal device according to the physical layer multicast beamforming or the precoding matrix, where the first control information is used to indicate the timing of the multicast data. frequency resources, wherein the first control information further includes a group identifier of the first multicast group.
  5. 根据权利要求1-4任一项所述的方法，其特征在于，所述组播数据承载于第二时频资源，其中，所述第二时频资源与所述第一时频资源的频域资源相同，或者，所述第二时频资源的频域资源为所述第一时频资源的频域资源的子集。The method according to any one of claims 1-4, wherein the multicast data is carried on a second time-frequency resource, wherein the frequency of the second time-frequency resource and the first time-frequency resource domain resources are the same, or the frequency domain resources of the second time-frequency resources are a subset of the frequency domain resources of the first time-frequency resources.
  6. 根据权利要求1-5任一项所述的方法，其特征在于，所述第一设备为网络设备，或者所述第一设备为所述第一组播组中一个终端设备。The method according to any one of claims 1-5, wherein the first device is a network device, or the first device is a terminal device in the first multicast group.
  7. 根据权利要求1-6任一项所述的方法，其特征在于，所述第一设备向所述至少一个终端设备发送一个SRS配置信息，或者，所述第一设备分别向所述至少一个终端设备中的每个终端设备发送对应的SRS配置信息，所述每个终端设备对应的SRS配置信息均相同。The method according to any one of claims 1-6, wherein the first device sends an SRS configuration information to the at least one terminal device, or the first device sends the at least one terminal device Each terminal device in the device sends corresponding SRS configuration information, and the SRS configuration information corresponding to each terminal device is the same.
  8. 一种数据接收方法，其特征在于，所述方法包括：A data receiving method, characterized in that the method comprises:
    第一终端设备接收来自第一设备的信道探测参考信号SRS配置信息，所述SRS配置信息指示用于发送SRS的第一时频资源、SRS的序列和用于发送SRS的天线端口；The first terminal device receives channel sounding reference signal SRS configuration information from the first device, where the SRS configuration information indicates a first time-frequency resource for sending the SRS, a sequence of the SRS, and an antenna port for sending the SRS;
    所述第一终端设备在所述第一时频资源上向所述第一设备发送第一SRS，所述第一终端设备属于第一组播组，所述第一时频资源承载来自所述第一组播组中的至少一 个终端设备的至少一个SRS，且所述第一SRS属于所述至少一个SRS，所述至少一个SRS用于所述第一设备确定组播信道状态信息；The first terminal device sends a first SRS to the first device on the first time-frequency resource, the first terminal device belongs to a first multicast group, and the first time-frequency resource carries information from the At least one SRS of at least one terminal device in the first multicast group, and the first SRS belongs to the at least one SRS, and the at least one SRS is used for the first device to determine multicast channel state information;
    所述第一终端设备接收来自所述第一设备的组播数据。The first terminal device receives multicast data from the first device.
  9. 根据权利要求8所述的方法，其特征在于，所述至少一个SRS是通过相同的天线端口发送的。The method according to claim 8, wherein the at least one SRS is transmitted through the same antenna port.
  10. 根据权利要求8或9所述的方法，其特征在于，所述方法还包括：The method according to claim 8 or 9, wherein the method further comprises:
    所述第一终端设备向所述第一设备发送天线端口指示信息，所述天线端口指示信息用于指示所述第一终端设备的天线端口数量，或者，所述第一终端设备的天线端口索引的集合；所述天线端口指示信息用于所述第一设备确定所述用于发送SRS的天线端口。The first terminal device sends antenna port indication information to the first device, where the antenna port indication information is used to indicate the number of antenna ports of the first terminal device, or the antenna port index of the first terminal device A set; the antenna port indication information is used by the first device to determine the antenna port for sending the SRS.
  11. 根据权利要求8-10任一项所述的方法，其特征在于，所述方法还包括：The method according to any one of claims 8-10, wherein the method further comprises:
    所述第一终端设备接收来自所述第一设备的第一控制信息，所述第一控制信息用于指示所述组播数据的时频资源，其中，所述第一控制信息还包括所述第一组播组的组标识，所述第一控制信息是所述第一设备根据所述物理层组播波束赋形或者所述预编码矩阵发送的。The first terminal device receives first control information from the first device, where the first control information is used to indicate the time-frequency resource of the multicast data, where the first control information further includes the A group identifier of the first multicast group, where the first control information is sent by the first device according to the physical layer multicast beamforming or the precoding matrix.
  12. 根据权利要求8-11任一项所述的方法，其特征在于，所述组播数据承载于第二时频资源，其中，所述第二时频资源与所述第一时频资源的频域资源相同，或者，所述第二时频资源的频域资源为所述第一时频资源的频域资源的子集。The method according to any one of claims 8-11, wherein the multicast data is carried on a second time-frequency resource, wherein the frequency of the second time-frequency resource and the first time-frequency resource domain resources are the same, or the frequency domain resources of the second time-frequency resources are a subset of the frequency domain resources of the first time-frequency resources.
  13. 根据权利要求8-12任一项所述的方法，其特征在于，所述第一设备为网络设备，或者所述第一设备为所述第一组播组中一个终端设备。The method according to any one of claims 8-12, wherein the first device is a network device, or the first device is a terminal device in the first multicast group.
  14. 一种通信装置，其特征在于，所述通信装置包括：A communication device, characterized in that the communication device includes:
    发送模块，用于向第一组播组中至少一个终端设备发送信道探测参考信号SRS配置信息，所述SRS配置信息指示用于发送SRS的第一时频资源、SRS的序列和用于发送SRS的天线端口；A sending module, configured to send channel sounding reference signal SRS configuration information to at least one terminal device in the first multicast group, where the SRS configuration information indicates the first time-frequency resource for sending SRS, the sequence of SRS, and the sequence for sending SRS Antenna port;
    接收模块，用于在所述第一时频资源上接收来自所述至少一个终端设备的至少一个SRS，并基于所述至少一个SRS确定组播信道状态信息，其中，承载所述至少一个SRS的时频资源相同，且所述至少一个SRS的序列相同；A receiving module, configured to receive at least one SRS from the at least one terminal device on the first time-frequency resource, and determine multicast channel state information based on the at least one SRS, wherein the at least one SRS carrying the The time-frequency resources are the same, and the sequence of the at least one SRS is the same;
    处理模块，用于根据所述组播信道状态信息确定物理层组播波束赋形或者预编码矩阵；A processing module, configured to determine a physical layer multicast beamforming or a precoding matrix according to the multicast channel state information;
    所述发送模块，还用于根据所述物理层组播波束赋形或者所述预编码矩阵向所述至少一个终端设备发送组播数据。The sending module is further configured to send multicast data to the at least one terminal device according to the physical layer multicast beamforming or the precoding matrix.
  15. 根据权利要求14所述的装置，其特征在于，所述至少一个SRS是通过相同的天线端口发送的。The apparatus according to claim 14, wherein the at least one SRS is transmitted through the same antenna port.
  16. 根据权利要求14或15所述的装置，其特征在于，所述接收模块，还用于接收来自所述至少一个终端设备的至少一个天线端口指示信息，所述天线端口指示信息用于指示对应终端设备的天线端口数量，或者，所述对应终端设备的天线端口索引的集合；The apparatus according to claim 14 or 15, wherein the receiving module is further configured to receive at least one antenna port indication information from the at least one terminal device, and the antenna port indication information is used to indicate the corresponding terminal The number of antenna ports of the device, or the set of antenna port indexes of the corresponding terminal device;
    所述处理模块，还用于根据所述至少一个天线端口指示信息确定所述用于发送SRS的天线端口。The processing module is further configured to determine the antenna port used for sending the SRS according to the at least one antenna port indication information.
  17. 根据权利要求14-16任一项所述的装置，其特征在于，所述发送模块，还用于根据所述物理层组播波束赋形或者所述预编码矩阵向所述至少一个终端设备发送第一控制信息，所述第一控制信息用于指示所述组播数据的时频资源，其中，所述第一控制信息还包括所述第一组播组的组标识。The device according to any one of claims 14-16, wherein the sending module is further configured to send the message to the at least one terminal device according to the physical layer multicast beamforming or the precoding matrix First control information, where the first control information is used to indicate the time-frequency resource of the multicast data, where the first control information further includes a group identifier of the first multicast group.
  18. 根据权利要求14-17任一项所述的装置，其特征在于，所述组播数据承载于第二时频资源，其中，所述第二时频资源与所述第一时频资源的频域资源相同，或者，所述第二时频资源的频域资源为所述第一时频资源的频域资源的子集。The device according to any one of claims 14-17, wherein the multicast data is carried on a second time-frequency resource, wherein the frequency of the second time-frequency resource and the first time-frequency resource domain resources are the same, or the frequency domain resources of the second time-frequency resources are a subset of the frequency domain resources of the first time-frequency resources.
  19. 根据权利要求14-18任一项所述的装置，其特征在于，所述通信装置为网络设备，或者所述通信装置为所述第一组播组中一个终端设备。The device according to any one of claims 14-18, wherein the communication device is a network device, or the communication device is a terminal device in the first multicast group.
  20. 根据权利要求14-19任一项所述的装置，其特征在于，所述通信装置向所述至少一个终端设备发送一个SRS配置信息，或者，所述通信装置分别向所述至少一个终端设备中的每个终端设备发送对应的SRS配置信息，所述每个终端设备对应的SRS配置信息均相同。The device according to any one of claims 14-19, wherein the communication device sends an SRS configuration information to the at least one terminal device, or the communication device sends an SRS configuration information to the at least one terminal device respectively. Each terminal device sends corresponding SRS configuration information, and the SRS configuration information corresponding to each terminal device is the same.
  21. 一种通信装置，其特征在于，所述通信装置包括：A communication device, characterized in that the communication device includes:
    接收模块，用于接收来自第一设备的信道探测参考信号SRS配置信息，所述SRS配置信息指示用于发送SRS的第一时频资源、SRS的序列和用于发送SRS的天线端口；A receiving module, configured to receive channel sounding reference signal SRS configuration information from the first device, where the SRS configuration information indicates a first time-frequency resource for sending SRS, a sequence of SRS, and an antenna port for sending SRS;
    发送模块，用于在所述第一时频资源上向所述第一设备发送第一SRS，所述通信装置属于第一组播组，所述第一时频资源承载来自所述第一组播组中的至少一个终端设备的至少一个SRS，且所述第一SRS属于所述至少一个SRS，所述至少一个SRS用于所述第一设备确定组播信道状态信息；A sending module, configured to send a first SRS to the first device on the first time-frequency resource, the communication device belongs to a first multicast group, and the first time-frequency resource carries information from the first group Broadcast at least one SRS of at least one terminal device in the group, and the first SRS belongs to the at least one SRS, and the at least one SRS is used for the first device to determine multicast channel state information;
    所述接收模块，还用于接收来自所述第一设备的组播数据。The receiving module is further configured to receive multicast data from the first device.
  22. 根据权利要求21所述的装置，其特征在于，所述至少一个SRS是通过相同的天线端口发送的。The apparatus according to claim 21, wherein the at least one SRS is transmitted through the same antenna port.
  23. 根据权利要求21或22所述的装置，其特征在于，所述发送模块，还用于向所述第一设备发送天线端口指示信息，所述天线端口指示信息用于指示所述通信装置的天线端口数量，或者，所述通信装置的天线端口索引的集合；所述天线端口指示信息用于所述第一设备确定所述用于发送SRS的天线端口。The device according to claim 21 or 22, wherein the sending module is further configured to send antenna port indication information to the first device, and the antenna port indication information is used to indicate the antenna of the communication device The number of ports, or a set of antenna port indexes of the communication device; the antenna port indication information is used by the first device to determine the antenna port for sending the SRS.
  24. 根据权利要求21-23任一项所述的装置，其特征在于，所述接收模块，还用于接收来自所述第一设备的第一控制信息，所述第一控制信息用于指示所述组播数据的时频资源，其中，所述第一控制信息还包括所述第一组播组的组标识，所述第一控制信息是所述第一设备根据所述物理层组播波束赋形或者所述预编码矩阵发送的。The device according to any one of claims 21-23, wherein the receiving module is further configured to receive first control information from the first device, the first control information is used to indicate the Time-frequency resources for multicast data, wherein the first control information further includes the group identifier of the first multicast group, and the first control information is the first device according to the physical layer multicast beam assignment shape or the precoding matrix is sent.
  25. 根据权利要求21-24任一项所述的装置，其特征在于，所述组播数据承载于第二时频资源，其中，所述第二时频资源与所述第一时频资源的频域资源相同，或者，所述第二时频资源的频域资源为所述第一时频资源的频域资源的子集。The device according to any one of claims 21-24, wherein the multicast data is carried on a second time-frequency resource, wherein the frequency of the second time-frequency resource and the first time-frequency resource domain resources are the same, or the frequency domain resources of the second time-frequency resources are a subset of the frequency domain resources of the first time-frequency resources.
  26. 根据权利要求21-25任一项所述的装置，其特征在于，所述第一设备为网络设备，或者所述第一设备为所述第一组播组中一个终端设备。The apparatus according to any one of claims 21-25, wherein the first device is a network device, or the first device is a terminal device in the first multicast group.
  27. 一种通信装置，其特征在于，所述通信装置包括：A communication device, characterized in that the communication device includes:
    处理器与通信接口；Processor and communication interface;
    所述处理器，用于执行所述通信装置中存储的计算机程序或指令，以使得所述通信装置执行如权利要求1至7中任一项所述的方法。The processor is configured to execute computer programs or instructions stored in the communication device, so that the communication device executes the method according to any one of claims 1-7.
  28. 一种通信装置，其特征在于，所述通信装置包括：A communication device, characterized in that the communication device includes:
    处理器与通信接口；Processor and communication interface;
    所述处理器，用于执行所述通信装置中存储的计算机程序或指令，以使得所述通信装置执行如权利要求8至13中任一项所述的方法。The processor is configured to execute computer programs or instructions stored in the communication device, so that the communication device executes the method according to any one of claims 8 to 13.
  29. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质中存储有指令，当所述指令在计算机上运行时，使得所述计算机执行权利要求1至7或8-13任一项所述的方法。A computer-readable storage medium, characterized in that instructions are stored in the computer-readable storage medium, and when the instructions are run on a computer, the computer is made to execute any one of claims 1 to 7 or 8-13. method described in the item.
  30. 一种通信***，其特征在于，所述通信***包括如权利要求14-20任一项所述的通信装置和权利要求21-26任一项所述的通信装置。A communication system, characterized in that the communication system comprises the communication device according to any one of claims 14-20 and the communication device according to any one of claims 21-26.
PCT/CN2022/101686 2021-07-02 2022-06-27 Data sending and receiving method and apparatus WO2023274182A1 (en)

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US20210153164A1 (en) * 2019-11-15 2021-05-20 Qualcomm Incorporated Multicast feedback based on acknowledgment transmissions
US20210152307A1 (en) * 2019-11-15 2021-05-20 Qualcomm Incorporated Multicast feedback based on reference signal transmissions
CN112838916A (en) * 2019-11-25 2021-05-25 大唐移动通信设备有限公司 Information transmission method and device

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US20210153164A1 (en) * 2019-11-15 2021-05-20 Qualcomm Incorporated Multicast feedback based on acknowledgment transmissions
US20210152307A1 (en) * 2019-11-15 2021-05-20 Qualcomm Incorporated Multicast feedback based on reference signal transmissions
CN112838916A (en) * 2019-11-25 2021-05-25 大唐移动通信设备有限公司 Information transmission method and device

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