WO2023061238A1 - 一种通信方法及装置 - Google Patents

一种通信方法及装置 Download PDF

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Publication number
WO2023061238A1
WO2023061238A1 PCT/CN2022/122879 CN2022122879W WO2023061238A1 WO 2023061238 A1 WO2023061238 A1 WO 2023061238A1 CN 2022122879 W CN2022122879 W CN 2022122879W WO 2023061238 A1 WO2023061238 A1 WO 2023061238A1
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WIPO (PCT)
Prior art keywords
capability
information
receiving
communication
frequency band
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PCT/CN2022/122879
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English (en)
French (fr)
Inventor
张海森
李秉肇
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华为技术有限公司
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Priority to AU2022367093A priority Critical patent/AU2022367093A1/en
Publication of WO2023061238A1 publication Critical patent/WO2023061238A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0007—Control or signalling for completing the hand-off for multicast or broadcast services, e.g. MBMS
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/08—Reselecting an access point
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/22—Processing or transfer of terminal data, e.g. status or physical capabilities
    • H04W8/24—Transfer of terminal data

Definitions

  • the present application relates to the technical field of communication, and in particular to a communication method and device.
  • Multimedia broadcast multicast service or multicast/multicast broadcast service (multicast broadcast service, MBS) is mainly applicable to multiple user equipment (user equipment, UE) services, such as live broadcast, timing Play programs, etc.
  • UE user equipment
  • an access network device can obtain UE capability information through a capability query process, and the UE capability information includes MBMS capability information.
  • the MBMS capability information currently designed by LTE is at the UE level, and only supports the reporting of the maximum bandwidth used for MBS.
  • this method cannot accurately report the multicast capability of the UE. Therefore, how to achieve accurate reporting of the multicast capability of the UE still needs further research.
  • the present application provides a communication method and device, which are used to solve the problem of low accuracy in reporting multicast capabilities of terminal equipment.
  • the present application provides a communication method, which can be executed by a first communication device, and the first communication device can be a communication device or a communication device capable of supporting the communication device to implement the functions required by the method, such as a chip.
  • the first communication device is a terminal device, or is a chip disposed in the terminal device for realizing the functions of the terminal device, or is other components for realizing the functions of the terminal device.
  • the first communication device is a terminal device as an example for description.
  • the method includes: the terminal device determines capability information and sends it to the access network device, the capability information indicates the capability of receiving the multicast service corresponding to the frequency band, and/or, the capability of receiving the multicast service corresponding to the component carrier (CC) Ability.
  • the terminal device determines capability information and sends it to the access network device, the capability information indicates the capability of receiving the multicast service corresponding to the frequency band, and/or, the capability of receiving the multicast service corresponding to the component carrier (CC) Ability.
  • CC component carrier
  • the terminal device can indicate the band (or band) level and/or CC level multicast capability through capability information, thereby improving the accuracy of multicast capability reporting, so that the access network device can obtain refined capability information.
  • the access network device can provide multicast service and/or unicast service according to refined capability information, for example, can configure or select the multicast service and/or unicast service according to refined capability information communication parameters.
  • the capability information indicates the capability of receiving the multicast service corresponding to the frequency band, and/or the capability of receiving the multicast service corresponding to the component carrier CC, including: the capability information includes frequency band combination information, and the frequency band combination information indicates The capability of receiving multicast services corresponding to the frequency band, and/or the capability of receiving multicast services corresponding to the component carrier CC.
  • the terminal device can report the band-level or CC-level multicast capability under the frequency band combination, thereby improving the accuracy of the multicast capability report.
  • the capability information indicates the capability of receiving the multicast service corresponding to the frequency band, and/or the capability of receiving the multicast service corresponding to the component carrier CC, including: the capability information includes the first frequency band combination list and the first characteristic The identification of the set combination; wherein, the first frequency band combination list includes the first frequency band information, and the first frequency band information includes the identification of N frequency bands that support receiving multicast services, and N is an integer greater than 0; the first feature set combination includes the first At least one first parameter set corresponding to the frequency band combination list, any first parameter set indicates the ability to receive multicast services corresponding to the N frequency bands, and/or, the corresponding multicast reception capability of the CC on each of the N frequency bands business capability.
  • the access network equipment by enumerating the identifiers of N frequency bands that support receiving multicast services in the frequency band combination list, and indicating the capabilities of receiving multicast services corresponding to the N frequency bands under the frequency band combination in the feature set combination, it can be improved.
  • the accuracy of the multicast capability helps the access network equipment to schedule multicast services and/or unicast services for the terminal equipment.
  • the first frequency band combination list also includes second frequency band information, and the second frequency band information includes identifiers of M frequency bands supporting unicast services, where M is an integer greater than 0; any first parameter set also indicates Capabilities of receiving unicast services corresponding to the M frequency bands respectively, or, any first parameter set further indicates capabilities of receiving communication services corresponding to the M frequency bands respectively, and the communication services include unicast services and multicast services.
  • the ability to receive unicast services on the M frequency bands under the frequency band combination can be reported, which helps the access network equipment to obtain refined terminal equipment capabilities, thereby helping the access network equipment to better provide terminal equipment with Multicast traffic and/or Unicast traffic.
  • the capability information indicates the capability of receiving the multicast service corresponding to the frequency band, and/or the capability of receiving the multicast service corresponding to the component carrier CC, including: the capability information includes the second frequency band combination list and the second characteristic An identification of a set combination; wherein, the second frequency band combination list includes identifications of N frequency bands that support receiving multicast services, and N is an integer greater than 0; the second characteristic set combination includes Q1 group parameters corresponding to the second frequency band combination list, wherein , each set of parameters includes Q2 second parameter sets, any second parameter set indicates the ability to receive multicast services corresponding to N frequency bands, and/or, the corresponding multicast reception capability of CCs on each of the N frequency bands Service capability, Q1 is an integer greater than 0, and Q2 is an integer greater than 0.
  • the frequency band combination list that is, the second frequency band combination list
  • the frequency band combination list that is, the second frequency band combination list
  • the multicast capability and unicast capability corresponding to the N frequency bands are distinguished, so that the unicast capability and the multicast capability can be combined to indicate the communication capability of the terminal device under the frequency band combination, compared to sequentially indicating through exhaustive means All multicast capabilities and/or unicast capabilities supported by the frequency band combination can reduce unnecessary reporting of capability information, thereby reducing signaling overhead.
  • the capability information also includes a third frequency band combination list, where the third frequency band combination list includes identifiers of M frequency bands that support receiving unicast services, and M is an integer greater than 0;
  • the second feature set combination also includes Including Q2 third parameter sets corresponding to the third frequency band combination list, any third parameter set indicates the ability to receive unicast services corresponding to M frequency bands; wherein, the i-th second parameter in the Q2 second parameter sets The set corresponds to the i-th first parameter set in any set of parameters in the Q1 group of parameters, where i is an integer greater than 0 and not greater than Q2.
  • the unicast capability and the multicast capability can be combined to indicate the communication capability of the terminal device under the frequency band combination. Compared with the exhaustive In this way, the signaling overhead can be reduced. And for the indication of the unicast capability part, the existing mechanism can be reused to the greatest extent, and the modification of the protocol can be reduced.
  • the capability information indicates the capability of receiving the multicast service corresponding to the frequency band, and/or the capability of receiving the multicast service corresponding to the component carrier CC, including: the capability information includes the second frequency band combination list and the Q1 first The identification of the combination of three feature sets; wherein, the second frequency band combination list includes identifications of N frequency bands that support receiving multicast services, and N is an integer greater than 0; any third feature set combination includes Q2 fourth parameter sets, any A fourth parameter set indicates the ability to receive multicast services corresponding to N frequency bands, and/or, the ability to receive multicast services corresponding to CCs on each frequency band in the N frequency bands, Q1 is an integer greater than 0, and Q2 is An integer greater than 0.
  • the N frequency bands that support receiving multicast services are indicated by extending the frequency band combination list (that is, the second frequency band combination list), and by extending the feature set combinations corresponding to the N frequency bands that receive multicast services (that is, Q1 third characteristic Set combination), so as to improve the accuracy of multicast capability reporting, so that access network devices can obtain refined capability information.
  • a possible implementation is helpful for access network equipment to schedule multicast services or unicast services for terminal equipment.
  • the multicast capability and unicast capability corresponding to the N frequency bands are distinguished, so that the unicast capability and the multicast capability can be combined to indicate the communication capability of the terminal device under the frequency band combination, compared to sequentially indicating through exhaustive means All multicast capabilities and/or unicast capabilities supported by the frequency band combination can reduce unnecessary reporting of capability information, thereby reducing signaling overhead.
  • the capability information also includes a third frequency band combination list and an identifier of a fourth feature set combination, where the third frequency band combination includes identifiers of M frequency bands that support receiving unicast services, and M is an integer greater than 0 ;
  • the fourth feature set combination includes Q2 fifth parameter sets, any fifth parameter set indicates the ability to receive unicast services corresponding to the M frequency bands respectively.
  • the combination of the fourth feature set combination and the third feature set combination can reduce the signaling overhead of capability reporting, and the existing mechanism can be reused to the greatest extent for the indication of the unicast capability part. , with minor changes to the protocol.
  • the capability information includes a fourth frequency band combination list and an identifier of a fifth feature set combination; wherein, the fourth frequency band combination list includes identifiers of X frequency bands supported by the terminal device, and X is an integer greater than 0;
  • the combination of five feature sets includes at least one sixth parameter set, and any sixth parameter set indicates communication parameters corresponding to X frequency bands, wherein, the X frequency bands include N frequency bands that support receiving multicast services, and any of the N frequency bands
  • the communication parameter corresponding to the frequency band indicates the capability of receiving multicast services corresponding to the frequency band, and/or the communication capability corresponding to the CC on the frequency band, wherein, if the CC supports receiving multicast services, the communication capability corresponding to the CC is the corresponding multicast reception capability of the CC Service capability, N is an integer greater than 0 and not greater than X.
  • the communication parameters corresponding to the feature set index indicate the ability to receive multicast services, which can reduce the signaling overhead of reporting the ability, and for the indication of the unicast capability part, the existing mechanism can be reused to the greatest extent. changes are minor.
  • any sixth parameter set indicates communication parameters corresponding to X frequency bands, including: any sixth parameter set includes indexes of communication parameters corresponding to X frequency bands, and any frequency band in the X frequency bands The index of the communication parameter satisfies: if the frequency band supports receiving multicast service, the index of the communication parameter corresponding to the frequency band belongs to the first index set; if the frequency band does not support receiving multicast service, the index of the communication parameter corresponding to the frequency band belongs to the second index set.
  • the access network device can determine whether the frequency band supports multicast service reception according to the index corresponding to the frequency band.
  • the method can reduce the signaling overhead and the complexity of the protocol, and can also improve the compatibility with the old version of the protocol.
  • the communication parameter corresponding to any frequency band in the N frequency bands indicates the communication capability corresponding to the CC on the frequency band, including: the communication parameter corresponding to any frequency band in the N frequency bands includes an index of the communication capability corresponding to the CC on the frequency band , the index of the communication capability corresponding to any CC on the frequency band satisfies: if the CC supports receiving multicast services, the index of the communication capability corresponding to the CC belongs to the third index set; if the CC does not support receiving multicast services, the index of the communication capability corresponding to the CC Belongs to the fourth index set.
  • the access network device can determine whether the CC supports multicast service reception according to the index corresponding to the CC. , can reduce signaling overhead and protocol complexity, and can also improve compatibility with devices supporting older versions of the protocol.
  • the capability of receiving multicast services corresponding to the frequency band includes at least one of the following: the frequency band supports receiving multicast services, or communication parameters for receiving multicast services on the frequency band.
  • the capability of receiving multicast services corresponding to the CC includes: the CC supports receiving multicast services, and/or, receiving communication information of multicast services on the CC; where the communication information is receiving multicast services on the CC
  • the communication parameter of the multicast service, or the communication information is the capability value of the CC, and the capability value is determined according to the communication parameter of receiving the multicast service on the CC.
  • the communication parameters for receiving the multicast service include the highest modulation order supported when receiving the multicast service.
  • the communication parameters for receiving multicast services also include: whether to support simultaneous reception of unicast services and multicast services in the case of synchronization, and/or, whether to support simultaneous reception of unicast services without synchronization business and multicast business.
  • the method further includes: sending indication information to the access network device, where the indication information indicates the modulation order of the multicast service that the terminal equipment is receiving or expects to receive.
  • the access network device can learn relevant information that the terminal device is receiving or expects to receive the multicast service according to the indication information, so that the terminal device can better schedule the multicast service and/or the unicast service.
  • the method before sending the indication information to the access network device, the method further includes: receiving fourth information from the access network device, where the fourth information is used to indicate to report the different public Information about multicast services received by a land mobile network (public land mobile network, PLMN) or different operators or across base stations or non-serving cells or at different frequencies.
  • a land mobile network public land mobile network, PLMN
  • PLMN public land mobile network
  • the method before sending the indication information to the access network device, the method further includes:
  • the PLMN in the TMGI of the received multicast service is inconsistent with the PLMN contained in the system information block (system information block, SIB) 1 of the serving cell of the access network device;
  • SIB system information block
  • the PLMN included in the SIB1 of the cell receiving the multicast service is inconsistent with the PLMN included in the SIB1 of the serving cell of the access network device.
  • the fourth information includes one or more PLMN information
  • the method before sending the indication information to the access network device, the method further includes:
  • the PLMN in the TMGI of the received multicast service is different from the one or more PLMNs;
  • the PLMN contained in the SIB1 of the cell receiving the multicast service is different from the one or more PLMNs.
  • the method before sending the indication information to the access network device, the method further includes:
  • the frequency point for receiving the multicast service does not belong to the frequency point included in the SIB 21 of the serving cell of the access network device;
  • the frequency point for receiving the multicast service is different from the frequency point in the frequency point list included in the user service description (user service description, USD).
  • the fourth information includes one or more frequency point information
  • the method before sending the indication information to the access network device, the method further includes:
  • the frequency point of the received multicast service is different from the one or more frequency points.
  • the method before sending the indication information to the access network device, the method further includes: receiving the SIB 21 from the access network device.
  • the indication information also indicates that the terminal equipment is receiving or expects to receive at least one of the following information of the multicast service: frequency information, temporary mobile group identity (TMGI), subcarrier spacing (subcarrier spacing , SCS).
  • TMGI temporary mobile group identity
  • SCS subcarrier spacing
  • the method before determining the capability information, further includes: receiving capability report indication information from the access network device, where the capability report indication information instructs the terminal device to report the capability of receiving multicast services.
  • the terminal device can report the multicast capability according to the instruction of the access network device, which can avoid the unnecessary capability information reporting of the terminal device.
  • the access network device can flexibly control the terminal device to report and receive the multicast service through the instruction information. ability.
  • the present application provides a communication method, which can be executed by a second communication device, and the second communication device can be a communication device or a communication device capable of supporting the communication device to implement the functions required by the method, such as a chip.
  • the second communication device is a network device (such as a base station), or a chip configured in the network device for realizing the function of the network device, or is other components for realizing the function of the network device.
  • the second communication device is taken as a network device as an example for description.
  • the method includes: receiving capability information from a terminal device, the capability information indicating the capability of receiving multicast services corresponding to a frequency band, and/or the capability of receiving multicast services corresponding to a CC; determining the capability of the terminal device according to the capability information.
  • the capability information indicates the capability of receiving the multicast service corresponding to the frequency band, and/or the capability of receiving the multicast service corresponding to the component carrier CC, including: the capability information includes frequency band combination information, and the frequency band combination information indicates The capability of receiving multicast services corresponding to the frequency band, and/or the capability of receiving multicast services corresponding to the component carrier CC.
  • the terminal device can report the band-level or CC-level multicast capability under the frequency band combination, thereby improving the accuracy of the multicast capability report.
  • the capability information indicates the capability of receiving the multicast service corresponding to the frequency band, and/or the capability of receiving the multicast service corresponding to the component carrier CC, including: the capability information includes the first frequency band combination list and the first characteristic The identification of the set combination; wherein, the first frequency band combination list includes the first frequency band information, and the first frequency band information includes the identification of N frequency bands that support receiving multicast services, and N is an integer greater than 0; the first feature set combination includes the first At least one first parameter set corresponding to the frequency band combination list, any first parameter set indicates the ability to receive multicast services corresponding to the N frequency bands, and/or, the corresponding multicast reception capability of the CC on each of the N frequency bands business capability.
  • the first frequency band combination list also includes second frequency band information, and the second frequency band information includes identifiers of M frequency bands supporting unicast services, where M is an integer greater than 0; any first parameter set also indicates Capabilities of receiving unicast services corresponding to the M frequency bands respectively, or, any first parameter set further indicates capabilities of receiving communication services corresponding to the M frequency bands respectively, and the communication services include unicast services and multicast services.
  • the capability information indicates the capability of receiving the multicast service corresponding to the frequency band, and/or the capability of receiving the multicast service corresponding to the component carrier CC, including: the capability information includes the second frequency band combination list and the second characteristic An identification of a set combination; wherein, the second frequency band combination list includes identifications of N frequency bands that support receiving multicast services, and N is an integer greater than 0; the second characteristic set combination includes Q1 group parameters corresponding to the second frequency band combination list, wherein , each set of parameters includes Q2 second parameter sets, any second parameter set indicates the ability to receive multicast services corresponding to N frequency bands, and/or, the corresponding multicast reception capability of CCs on each of the N frequency bands Service capability, Q1 is an integer greater than 0, and Q2 is an integer greater than 0.
  • the capability information also includes a third frequency band combination list, where the third frequency band combination list includes identifiers of M frequency bands that support receiving unicast services, and M is an integer greater than 0;
  • the second feature set combination also includes Including Q2 third parameter sets corresponding to the third frequency band combination list, any third parameter set indicates the ability to receive unicast services corresponding to M frequency bands; wherein, the i-th second parameter in the Q2 second parameter sets The set corresponds to the i-th first parameter set in any set of parameters in the Q1 group of parameters, where i is an integer greater than 0 and not greater than Q2.
  • the unicast capability and the multicast capability can be combined to indicate the communication capability of the terminal device under the frequency band combination. Compared with the exhaustive In this way, the signaling overhead can be reduced. And for the unicast capability part, the existing mechanism can be reused to the greatest extent, and the modification of the protocol is minor.
  • the capability information indicates the capability of receiving the multicast service corresponding to the frequency band, and/or the capability of receiving the multicast service corresponding to the component carrier CC, including: the capability information includes the second frequency band combination list and the Q1 first The identification of the combination of three feature sets; wherein, the second frequency band combination list includes identifications of N frequency bands that support receiving multicast services, and N is an integer greater than 0; any third feature set combination includes Q2 fourth parameter sets, any A fourth parameter set indicates the ability to receive multicast services corresponding to N frequency bands, and/or, the ability to receive multicast services corresponding to CCs on each frequency band in the N frequency bands, Q1 is an integer greater than 0, and Q2 is An integer greater than 0.
  • the capability information also includes a third frequency band combination list and an identifier of a fourth feature set combination, where the third frequency band combination includes identifiers of M frequency bands that support receiving unicast services, and M is an integer greater than 0 ;
  • the fourth feature set combination includes Q2 fifth parameter sets, any fifth parameter set indicates the ability to receive unicast services corresponding to the M frequency bands respectively.
  • the capability information includes a fourth frequency band combination list and an identifier of a fifth feature set combination; wherein, the fourth frequency band combination list includes identifiers of X frequency bands supported by the terminal device, and X is an integer greater than 0;
  • the combination of five feature sets includes at least one sixth parameter set, and any sixth parameter set indicates communication parameters corresponding to X frequency bands, wherein, the X frequency bands include N frequency bands that support receiving multicast services, and any of the N frequency bands
  • the communication parameter corresponding to the frequency band indicates the capability of receiving multicast services corresponding to the frequency band, and/or the communication capability corresponding to the CC on the frequency band, wherein, if the CC supports receiving multicast services, the communication capability corresponding to the CC is the corresponding multicast reception capability of the CC Service capability, N is an integer greater than 0 and not greater than X.
  • any sixth parameter set indicates communication parameters corresponding to X frequency bands, including: any sixth parameter set includes indexes of communication parameters corresponding to X frequency bands, and any frequency band in the X frequency bands The index of the communication parameter satisfies: if the frequency band supports receiving multicast service, the index of the communication parameter corresponding to the frequency band belongs to the first index set; if the frequency band does not support receiving multicast service, the index of the communication parameter corresponding to the frequency band belongs to the second index set.
  • the access network device can determine whether the frequency band supports multicast service reception according to the index corresponding to the frequency band. , can reduce the signaling overhead and the complexity of the protocol, and can also improve the compatibility with the old version of the protocol.
  • the communication parameter corresponding to any frequency band in the N frequency bands indicates the communication capability corresponding to the CC on the frequency band, including: the communication parameter corresponding to any frequency band in the N frequency bands includes an index of the communication capability corresponding to the CC on the frequency band , the index of the communication capability corresponding to any CC on the frequency band satisfies: if the CC supports receiving multicast services, the index of the communication capability corresponding to the CC belongs to the third index set; if the CC does not support receiving multicast services, the index of the communication capability corresponding to the CC Belongs to the fourth index set.
  • the access network device can determine whether the CC supports multicast service reception according to the index corresponding to the CC. , can reduce the signaling overhead and the complexity of the protocol, and can also improve the compatibility with the old version of the protocol.
  • the capability of receiving multicast services corresponding to the frequency band includes at least one of the following: the frequency band supports receiving multicast services, or communication parameters for receiving multicast services on the frequency band.
  • the capability of receiving multicast services corresponding to the CC includes: the CC supports receiving multicast services, and/or, receiving communication information of multicast services on the CC; where the communication information is receiving multicast services on the CC
  • the communication parameter of the multicast service, or the communication information is the capability value of the CC, and the capability value is determined according to the communication parameter of receiving the multicast service on the CC.
  • the communication parameters for receiving the multicast service include the highest modulation order supported when receiving the multicast service.
  • the communication parameters for receiving multicast services also include: whether to support simultaneous reception of unicast services and multicast services in the case of synchronization, and/or, whether to support simultaneous reception of unicast services without synchronization business and multicast business.
  • the method further includes: receiving indication information from the terminal device, where the indication information includes the modulation order that the terminal device is receiving or expects to receive the multicast service.
  • the method before receiving the indication information from the terminal device, the method further includes: sending fourth information to the terminal device, where the fourth information is used to indicate to report a different PLMN or a different operator Or a multicast service received across base stations or non-serving cells or at different frequencies.
  • the method before receiving the indication information from the terminal device, the method further includes: sending the SIB 21 to the terminal device.
  • the method further includes: determining communication parameters for communicating with the terminal device according to the indication information.
  • the method before receiving the capability information from the terminal device, the method further includes: sending capability report indication information to the terminal device, where the capability report indication information instructs the terminal device to report the capability of receiving multicast services.
  • the terminal device can report the multicast capability under the instruction of the access network device, so that unnecessary reporting of the multicast capability can be avoided.
  • the access network device can send the multicast service to the terminal device according to the capability information.
  • the access network device can configure the MBS radio bearer (MBS radio bearer, MRB) of the multicast service according to the capability information, for example, the radio resource control (radio resource control, RRC ) configuration message configures the MRB.
  • MBS radio bearer MRB
  • RRC radio resource control
  • the access network device may also receive indication information, which indicates the information of the multicast service that the terminal equipment is receiving or expects to receive, such as session ID (session ID), used subcarrier spacing (subcarrier spacing, SCS), bandwidth (Bandwidth, BW), frequency and other information.
  • indication information indicates the information of the multicast service that the terminal equipment is receiving or expects to receive, such as session ID (session ID), used subcarrier spacing (subcarrier spacing, SCS), bandwidth (Bandwidth, BW), frequency and other information.
  • the access network device may send the unicast service to the terminal device according to the capability information and indication information reported by the terminal device.
  • the present application provides a communication method, and the execution body of the method may be a terminal device, or may be a chip or a circuit or other components for realizing functions of the terminal device.
  • the method includes: determining first information and second information, wherein the first information indicates that the terminal device is interested in a multicast service, and the second information indicates the multicast service that the terminal device is interested in; sending the first information and the second information, Wherein, the first information is sent before the security activation, and the second information is sent after the security activation.
  • the access network device can configure resources for the multicast service for the terminal device, such as common frequency domain resources (common frequency resource, CFR), so that there is no need to reconfigure the resources for unicast services according to the multicast service, for example, it is not necessary to configure the initial bandwidth part (initial BWP) and then set the bandwidth of the initial BWP according to the multicast service Configured as CFR bandwidth.
  • CFR common frequency resource
  • the signaling overhead can be reduced, which helps to ensure the continuity of the multicast service.
  • sending the related information of the multicast service that the terminal device is interested in after the security activation can avoid the transmission of specific MBS information in an unsafe environment, thereby improving communication security.
  • the terminal device may send the first information before the security activation and send the second information after the security activation when at least one of the following conditions is met:
  • the cell/access network device accessed by the terminal device is providing multicast services
  • the cell/access network equipment accessed by the terminal equipment will provide multicast services
  • the cell/access network equipment accessed by the terminal equipment supports the provision of multicast services
  • the terminal device is receiving or expects to receive multicast services in the currently accessed cell/access network device
  • the multicast service that the terminal device is receiving or expects to receive is provided/will/supported by the currently accessed cell/access network device;
  • the cell currently accessed by the terminal device broadcasts the SIB for providing multicast service information
  • the cell currently accessed by the terminal device broadcasts a first SIB, and the first SIB carries multicast control configuration information (MCCH);
  • MCCH multicast control configuration information
  • the CFR bandwidth of the multicast service provided by the cell currently accessed by the terminal device is different from the initial BWP bandwidth configured in the system message;
  • the CFR bandwidth of the multicast service provided by the cell currently accessed by the terminal device is greater than the initial BWP bandwidth configured in the system message;
  • the terminal device receives third information from the access network device, where the third information instructs the terminal device to adopt a mode of sending the first information before the security activation and sending the second information after the security activation.
  • the third information is carried in a broadcast message.
  • the second information includes a multicast service identifier or a multicast service identifier or an Internet Protocol (IP) group address.
  • IP Internet Protocol
  • the first information is the frequency list of interest and/or the priority of the multicast service.
  • signaling overhead can be saved by implicitly indicating the first information through the frequency list of interest and/or the priority of the multicast service.
  • the present application provides a communication method, and the execution subject of the method may be an access network device, or may be a chip or a circuit.
  • the method includes: receiving first information and second information, wherein the first information indicates that the terminal device is interested in the multicast service, the second information indicates the multicast service that the terminal device is interested in, and the first information is received before security activation , the second information is received after the security activation; after receiving the first information, configure the initial BWP for the terminal device based on the first information, for example, configure the bandwidth of the initial BWP to the bandwidth of the CFR.
  • the second information includes a multicast service identifier or a multicast service identifier or an IP group address.
  • the access network device sends third information to the terminal device, and the third information instructs the terminal device to adopt a manner of sending the first information before the security activation and sending the second information after the security activation.
  • the third information is carried in a broadcast message.
  • the first information is the frequency list of interest and/or the priority of the multicast service.
  • signaling overhead can be saved by implicitly indicating the first information through the frequency list of interest and/or the priority of the multicast service.
  • the present application provides a communication method, and the execution body of the method may be an access network device, or may be a chip or a circuit.
  • the method includes: the first access network device indicates a corresponding relationship to the second access network device, and the corresponding relationship is a one-to-one relationship between one or more PLMN index values and one or more PLMN values;
  • the first access network device receives indication information from the terminal device, the indication information indicates that the terminal device is receiving or expects to receive multicast service information, the indication information includes at least one PLMN index value, and the at least one PLMN index value Belonging to the one or more PLMN index values; the first access network sends the indication information to the second access network device.
  • the indication information indicates that the terminal device is receiving or expects to receive at least one of the following information of the multicast service: frequency information, TMGI, SCS, or modulation order.
  • the first access network device indicates the corresponding relationship to the second access network device, including:
  • the first access network device sends the PLMN identification information in SIB1 to the second access network device, where the PLMN identification information indicates the corresponding relationship.
  • the first access network device indicates the corresponding relationship to the second access network device, including:
  • the first access network device sends an Xn interface establishment message or an NG-RAN node configuration update message to the second access network device, and the Xn interface establishment message or the NG-RAN node configuration update message includes at least one cell's information, the information of the first cell in the at least one cell indicates at least one PLMN of the first cell and the PLMN index value corresponding to each PLMN.
  • the first access network device indicates the corresponding relationship to the second access network device, including:
  • the first access network device sends an Xn interface establishment message or an NG-RAN node configuration update message to the second access network device, and the Xn interface establishment message or the NG-RAN node configuration update message includes at least one cell's Information, the information of the nth cell in the at least one cell indicates at least one PLMN and offset of the nth cell, and the offset is the first cell to the n-1th cell in the at least one cell
  • the total number of PLMNs of the cells where n is an integer greater than 0.
  • the present application provides a communication method, and the execution subject of the method may be an access network device, or may be a chip or a circuit.
  • the method includes: the second access network device obtains a corresponding relationship from the first access network device, and the corresponding relationship is a one-to-one relationship between one or more PLMN index values and one or more PLMN values;
  • the second access network device receives indication information from the first access network device, the indication information indicates that the terminal device is receiving or expects to receive multicast service information, and the indication information includes at least one PLMN index value;
  • the second access network determines the PLMN value corresponding to the at least one PLMN index value according to the correspondence relationship.
  • the indication information indicates that the terminal device is receiving or expects to receive at least one of the following information of the multicast service: frequency information, TMGI, SCS, or modulation order.
  • the second access network device obtains the corresponding relationship from the first access network device, including:
  • the second access network device receives the PLMN identification information in SIB1 sent from the first access network device, where the PLMN identification information indicates the corresponding relationship.
  • the second access network device obtains the corresponding relationship from the first access network device, including:
  • the second access network device receives an Xn interface setup message or an NG-RAN node configuration update message from the first access network device, and the Xn interface setup message or the NG-RAN node configuration update message includes at least one cell
  • the information of the first cell in the at least one cell indicates at least one PLMN value of the first cell and a PLMN index value corresponding to each PLMN.
  • the second access network device obtains the corresponding relationship from the first access network device, including:
  • the second access network device receives an Xn interface setup message or an NG-RAN node configuration update message from the first access network device, and the Xn interface setup message or the NG-RAN node configuration update message includes at least one cell
  • the information of the nth cell in the at least one cell indicates at least one PLMN value and offset of the nth cell in the at least one cell, and the offset is the first cell to the nth cell in the at least one cell - the total number of PLMNs in one cell, the n is an integer greater than 0.
  • the present application provides a communication method, and the execution body of the method may be an access network device, or may be a chip or a circuit.
  • the method includes: the first access network device receives first indication information from the terminal device, the first indication information indicates that the terminal device is receiving or expects to receive multicast service information, and the first indication information includes at least one PLMN index value; the first access network device sends second indication information to the second access network device, where the PLMN information in the second indication information is the PLMN value corresponding to the at least one PLMN index value.
  • the first indication information indicates that the terminal device is receiving or expects to receive at least one of the following information of the multicast service: frequency information, TMGI, SCS, or modulation order.
  • the second indication information is obtained by replacing the at least one PLMN index value in the first indication information with a PLMN value corresponding to the at least one PLMN index value.
  • the present application provides a communication method, and the execution subject of the method may be a terminal device, or may be a chip or a circuit.
  • the method includes: the terminal device receives service information from the access network device, the service information includes a first TMGI, and the first TMGI includes a first PLMN index value; the terminal device sends indication information to the access network device, The indication information indicates information that the terminal device is receiving or expects to receive a multicast service, the indication information includes a second TMGI, and the second TMGI includes a PLMN value corresponding to the first PLMN index value, where the first TMGI It is the same as the service ID (service ID) in the second TMGI.
  • the indication information indicates that the terminal device is receiving or expects to receive at least one of the following information of the multicast service: frequency information, TMGI, SCS, or modulation order.
  • the second TMGI is the TMGI carried in the application layer message received by the terminal device.
  • the second TMG is generated by the terminal device according to the first TMGI and the PLMN value corresponding to the first PLMN index value.
  • the present application further provides a communication device, and the communication device implements any method provided in the first aspect, the third aspect, or the eighth aspect.
  • the communication device may be realized by hardware, or may be realized by executing corresponding software by hardware.
  • the hardware or software includes one or more units or modules corresponding to the above functions.
  • the communication device includes: a processor, where the processor is configured to support the communication device to perform corresponding functions of the terminal device in the methods shown above.
  • the communication device may also include a memory, which may be coupled to the processor, which holds program instructions and data necessary for the communication device.
  • the communication device further includes an interface circuit, where the interface circuit is used to support communication between the communication device and equipment such as access network equipment.
  • the communication device includes corresponding functional modules, respectively configured to implement the steps in the above method.
  • the functions may be implemented by hardware, or may be implemented by executing corresponding software through hardware.
  • Hardware or software includes one or more modules corresponding to the above-mentioned functions.
  • the structure of the communication device includes a processing module and a communication module, and these modules can perform corresponding functions in the above-mentioned method example. Do repeat.
  • the present application further provides a communication device, the communication device has any method provided in the second aspect, the fourth aspect, the fifth aspect, the sixth aspect, or the seventh aspect.
  • the communication device may be realized by hardware, or may be realized by executing corresponding software by hardware.
  • the hardware or software includes one or more units or modules corresponding to the above functions.
  • the communication device includes: a processor, where the processor is configured to support the communication device to perform corresponding functions of the access network device in the methods shown above.
  • the communication device may also include a memory, which may be coupled to the processor, which holds program instructions and data necessary for the communication device.
  • the communication device further includes an interface circuit, where the interface circuit is used to support communication between the communication device and devices such as terminal equipment.
  • the communication device includes corresponding functional modules, respectively configured to implement the steps in the above method.
  • the functions may be implemented by hardware, or may be implemented by executing corresponding software through hardware.
  • Hardware or software includes one or more modules corresponding to the above-mentioned functions.
  • the structure of the communication device includes a processing module and a communication module, and these modules can perform corresponding functions in the above-mentioned method example.
  • a processing module and a communication module, and these modules can perform corresponding functions in the above-mentioned method example.
  • these modules can perform corresponding functions in the above-mentioned method example.
  • Do repeat refer to the description in the method provided in the second aspect or the fourth aspect, and here Do repeat.
  • a communication device including a processor and an interface circuit, and the interface circuit is used to receive signals from other communication devices other than the communication device and transmit them to the processor or transmit signals from the processor Sending to other communication devices other than the communication device, the processor implements the method in the aforementioned first aspect, third aspect, or eighth aspect and any possible design through a logic circuit or executing code instructions.
  • a communication device including a processor and an interface circuit, and the interface circuit is used to receive signals from other communication devices other than the communication device and transmit them to the processor or transmit signals from the processor sent to other communication devices other than the communication device, the processor is used to realize the second aspect or the fourth aspect or the fifth aspect or the sixth aspect or the seventh aspect and any possible design through a logic circuit or executing code instructions method in .
  • a computer-readable storage medium in which a computer program or instruction is stored, and when the computer program or instruction is executed by a processor, the aforementioned first aspect to the eighth aspect are realized Any aspect and method in any possible design.
  • a computer program product storing instructions, and when the instructions are executed by a processor, the method in any one of the aforementioned first to eighth aspects and any possible design is implemented.
  • a chip system in a fifteenth aspect, includes a processor, and may further include a memory, for implementing any one of the foregoing first to eighth aspects and any possible design method.
  • the system-on-a-chip may consist of chips, or may include chips and other discrete devices.
  • a communication system in a sixteenth aspect, includes the apparatus (such as terminal equipment) described in the first aspect and the apparatus (such as access network equipment) described in the second aspect.
  • the system includes the apparatus described in the third aspect (such as terminal equipment) and the apparatus described in the fourth aspect (such as access network equipment).
  • the system includes the device described in the fifth aspect (such as the first access network device) and the device described in the sixth aspect (such as the second access network device).
  • the system includes the apparatus described in the seventh aspect (such as the first access network device) and the second access network device.
  • the system includes the apparatus (such as terminal equipment) and access network equipment described in the eighth aspect.
  • FIG. 1 is a schematic diagram of a multicast service in an embodiment of the present application
  • FIG. 2 is a schematic diagram of a multicast scenario according to an embodiment of the present application.
  • FIG. 3 is a schematic diagram of a feature set combination in an embodiment of the present application.
  • FIG. 4 is a schematic structural diagram of capability information in an embodiment of the present application.
  • FIG. 5 is a schematic structural diagram of a communication system according to an embodiment of the present application.
  • FIG. 6 is a schematic structural diagram of another communication system according to an embodiment of the present application.
  • FIG. 7 is a schematic flowchart of a communication method according to an embodiment of the present application.
  • FIG. 8 is a schematic flow diagram of sending a multicast service according to an embodiment of the present application.
  • FIG. 9 is a schematic structural diagram of capability information in an embodiment of the present application.
  • FIG. 10 is a schematic flowchart of a communication method according to an embodiment of the present application.
  • FIG. 11 is a schematic structural diagram of a communication device according to an embodiment of the present application.
  • FIG. 12 is a schematic structural diagram of a communication device according to an embodiment of the present application.
  • MBS is a service transmitted to multiple terminal devices at the same time, such as live broadcast service, public safety service, batch software update service, etc.
  • Multicast services can include one or more of multicast services such as multicast and broadcast. Multicast services can also be called multicast services, broadcast services, multicast/broadcast services, multicast/multicast services, and multicast services. / broadcasting services, etc.
  • the MBS comes from the data server. First, the data server sends the MBS data to the core network device, then the core network device sends the MBS data to the access network device, and finally the access network device sends the MBS data to at least one terminal that receives the MBS. equipment.
  • the MBS data is transmitted through a common transmission channel, that is, the MBS session.
  • the access network device sends the data to the terminal device, there are two transmission methods: the first One can adopt point to multi-point (point to multi-point, PTM) transmission mode; the second can adopt point to point (point to point, PTP) transmission mode. As shown in Figure 1.
  • PTM point to multi-point
  • PTP point to point
  • MBS may also be called “MBS service”, “MBS broadcast service”, “MBS session”, “MBS broadcast service”, “MBS service” and so on.
  • a terminal device For a terminal device, it supports receiving MBS service from one access network device and receiving unicast service from another access network device, as shown in FIG. 2 .
  • the MBS service and the unicast service can also be received from one access network device.
  • MBS is only an exemplary naming of multicast services, and the naming of multicast services may be different under different communication standards.
  • multicast services may be called Multimedia broadcast multicast service (multimedia broadcast multicast service, MBMS), multicast service in new air interface (new radio, NR) can be called MBS, in future communication development, multicast service can also be named other, this application does not To be specifically defined, it is collectively referred to as a multicast service hereinafter.
  • Receive only mode (receive only mode, ROM) mode refers to a mode that allows terminal equipment to only receive multicast broadcast services without accessing the public land mobile network (PLMN) that provides multicast broadcast services and sends The schema in which it is registered.
  • PLMN public land mobile network
  • the network device obtains the capability information of the terminal device through the process of capability query. During the capability query process, the network device sends indication information to the terminal device, where the indication information is used to indicate the capability parameters that the terminal device needs to report. The terminal device uploads corresponding capability information according to the indication of the indication information.
  • a terminal device has a multi-radio access technology (radio access technology, RAT) capability, and the multi-RAT capability refers to the capability of the terminal device to work in multiple RATs at the same time.
  • RAT radio access technology
  • a typical representative of multi-RAT capability is the dual connectivity mode (E-UTRA-NR dual connectivity, EN-DC) of Evolved Universal Terrestrial Radio Access and New Air Interface.
  • EN-DC is a way in which LTE and NR work together as a dual connection mode, and LTE is the master node, that is, a terminal device is connected to both LTE network equipment and NR network equipment at the same time, and is served by these two network equipment at the same time.
  • the multi-RAT capability is also requested as a capability type when the capability is requested.
  • Capability structure of terminal equipment in NR due to different hardware or software versions of different terminal equipment, the capabilities supported internally by a RAT are not the same.
  • the terminal equipment is configured with an appropriate working mode.
  • the capability structure of NR terminal equipment includes band combination information (Band Combination Lists) and frequency band information.
  • Band combination information includes band lists (Band Lists) and feature set combinations (Feature Sets Combinations).
  • Band Lists includes the frequency band combination supported by the terminal device, and indicates which frequency bands are specifically included in the frequency band combination, such as band1+band2+band3. Of course, even if only one band is supported, it is reported through this structure.
  • Feature Sets Combinations indicates the capabilities supported by the terminal device on band combinations.
  • Feature Sets Combinations is a collection of multiple Feature Sets Combinations, where each Feature Sets Combination is a matrix element containing multiple feature set indexes (featuresetID), and each featuresetID is associated with a band.
  • featuresetID feature set indexes
  • it is the FeatureSetsCombination associated with the band combination including band A, band B, and band C, where each row corresponds to the uplink and downlink featuresetIDs used by band A, B, and C respectively. Different rows represent different featureset combinations supported by the UE in this band combination.
  • the matrix elements of the different feature sets supported by the UE in the combination of band A, band B, and band C are (0,0), (2,4), and (1,2), which can be understood.
  • the matrix element (0,0) it means that the index of the uplink feature set and the index of the downlink feature set used on band A are both 0;
  • the matrix element (2,4) it means that the index of the uplink feature set used on band B is 2 and the downstream feature set index is 4, and so on.
  • featuresetID corresponds to a set of communication parameters, which are used to indicate the capabilities supported by the terminal device on this band, such as the number of carriers, carrier bandwidth, and multiple-input multiple-output (MIMO) capabilities.
  • the communication parameters corresponding to the featuresetID may include the capabilities supported by the terminal device on the entire band, and the capabilities supported on each CC (featureset per CC) of the band.
  • the frequency band information may include frequency band lists (Band Lists).
  • Band Lists include the bands supported by the terminal device and the capabilities supported by the terminal device on each band.
  • the capability structure of the terminal device may be as shown in FIG. 4 .
  • capability structure of the terminal device may also include other information not shown, such as capability information of the terminal device level, which is not specifically limited here.
  • Unicast communication is performed between the network device and the terminal device, so the network device usually obtains the capability of the terminal device through a capability query process, so that the network device can send and receive data in a unicast manner according to the capability of the terminal device.
  • the network device may send capability query information to the terminal device to request the capability of the terminal device.
  • the capability query information usually includes an information element, and the information element includes multiple fields for indicating the capability of the terminal device to be requested.
  • the information element of the capability query information sent by the network device may be a filter function, for example: UE-Capability Request Filter Common.
  • the filter function is used to request the capabilities of an end device for filtering.
  • the capability of the filtered terminal device refers to the capability of the terminal device that meets the requirements of the network device. Therefore, the network device can obtain the capability of the terminal device that it instructs the terminal device to report through the filtering function.
  • Terminal equipment including equipment that provides voice and/or data connectivity to users, specifically, equipment that provides voice to users, or equipment that provides data connectivity to users, or equipment that provides voice and data connectivity to users sexual equipment. Examples may include a handheld device with wireless connectivity, or a processing device connected to a wireless modem.
  • the terminal device can communicate with the core network via a radio access network (radio access network, RAN), exchange voice or data with the RAN, or exchange voice and data with the RAN.
  • radio access network radio access network
  • the terminal equipment may include UE, wireless terminal equipment, mobile terminal equipment, device-to-device communication (device-to-device, D2D) terminal equipment, vehicle-to-everything (V2X) terminal equipment, machine-to-machine/machine-like Communication (machine-to-machine/machine-type communications, M2M/MTC) terminal equipment, Internet of things (internet of things, IoT) terminal equipment, subscriber unit (subscriber unit), subscriber station (subscriber station), mobile station (mobile station), remote station (remote station), access point (access point, AP), remote terminal (remote terminal), access terminal (access terminal), user terminal (user terminal), user agent (user agent), or User equipment (user device), etc.
  • IoT Internet of things
  • IoT Internet of things
  • IoT Internet of things
  • subscriber unit subscriber unit
  • subscriber station subscriber station
  • mobile station mobile station
  • remote station remote station
  • access point access point
  • AP remote terminal
  • remote terminal remote terminal
  • it may include mobile phones (or “cellular” phones), computers with mobile terminal equipment, portable, pocket, hand-held, computer built-in mobile devices, and the like.
  • PCS personal communication service
  • cordless telephone cordless telephone
  • session initiation protocol session initiation protocol
  • WLL wireless local loop
  • PDA personal digital assistant
  • constrained devices such as devices with low power consumption, or devices with limited storage capabilities, or devices with limited computing capabilities, etc.
  • it includes barcodes, radio frequency identification (radio frequency identification, RFID), sensors, global positioning system (global positioning system, GPS), laser scanners and other information sensing devices.
  • the terminal device may also be a wearable device.
  • Wearable devices can also be called wearable smart devices or smart wearable devices, etc., which is a general term for the application of wearable technology to intelligently design daily wear and develop wearable devices, such as glasses, gloves, watches, clothing and shoes wait.
  • a wearable device is a portable device that is worn directly on the body or integrated into the user's clothing or accessories. Wearable devices are not only a hardware device, but also achieve powerful functions through software support, data interaction, and cloud interaction.
  • Generalized wearable smart devices include full-featured, large-sized, complete or partial functions without relying on smart phones, such as smart watches or smart glasses, etc., and only focus on a certain type of application functions, and need to cooperate with other devices such as smart phones Use, such as various smart bracelets, smart helmets, smart jewelry, etc. for physical sign monitoring.
  • the terminal device may further include a relay (relay).
  • a relay relay
  • all devices capable of performing data communication with the base station can be regarded as terminal devices.
  • the device used to realize the function of the terminal device may be a terminal device, or a device applied to the terminal device that can support the terminal device to realize the function, such as a component or component with a communication function, or a chip system , the device can be installed in the terminal equipment.
  • the system-on-a-chip may be composed of chips, or may include chips and other discrete devices.
  • Network equipment including, for example, access network (access network, AN) equipment, such as base stations (eg, access points), may refer to equipment in the access network that communicates with terminal equipment through one or more cells over the air interface.
  • Network equipment may include evolved base stations (NodeB or eNB or e-NodeB, evolutional Node B) in the LTE system or long term evolution-advanced (LTE-A), or may also include fifth-generation mobile communication technologies (the 5th generation, 5G) NR system (also referred to as NR system) in the next generation node B (next generation node B, gNB) or may also include the cloud access network (cloud radio access network, Cloud RAN) system
  • the centralized unit (centralized unit, CU) and/or the distributed unit (distributed unit, DU) are not limited in this embodiment of the present application.
  • the network device can be a CU in the Cloud RAN system, or a DU, or a whole of CU and DU.
  • the network device may also include a core network device, and the core network device includes, for example, an access and mobility management function (access and mobility management function, AMF) and the like. Since the embodiments of the present application mainly relate to the access network, unless otherwise specified in the following, the network equipment mentioned refers to the access network equipment.
  • AMF access and mobility management function
  • the device for realizing the function of the network device may be a network device, or a device capable of supporting the network device to realize the function, such as a chip system, and the device may be installed in the network device.
  • the technical solution provided by the embodiment of the present application the technical solution provided by the embodiment of the present application is described by taking the network device as an example for realizing the function of the network device.
  • “at least one” means one or more, and “multiple” means two or more.
  • “And/or” describes the association relationship of associated objects, indicating that there may be three types of relationships, for example, A and/or B, which can mean: A exists alone, A and B exist simultaneously, and B exists alone, where A, B can be singular or plural.
  • the character “/” generally indicates that the contextual objects are an “or” relationship.
  • “At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items.
  • At least one item (piece) of a, b, or c can represent: a, b, c, a and b, a and c, b and c, or a and b and c, where a, b, c can be single or multiple.
  • first and second are used to distinguish multiple objects, and are not used to limit the size, content, order, and timing of multiple objects , priority or importance, etc.
  • first parameter and the second parameter are only used to distinguish different parameters, and do not mean that the content, value, priority or importance of the two parameters are different.
  • the communication between the terminal equipment and the network equipment is carried out on the band.
  • Different terminal devices may support different frequency bands or different frequency band combinations, and terminal devices may have different baseband capabilities on different frequency bands or frequency band combinations.
  • Baseband capabilities may include: carrier bandwidth, number of carriers, number of supported channel state indicator (CSI) processes, multiple-input multiple-output (MIMO) layers, etc.
  • the terminal device needs to report the supported frequency band or frequency band combination and baseband capability information to the network device.
  • the network device configures service resources according to the capabilities of the terminal device.
  • the terminal device may support receiving broadcast and multicast services while performing unicast operations, and at this time, the unicast and broadcast and multicast services share the baseband capability of the terminal device. Therefore, it is necessary for the terminal device to report its ability to receive multicast broadcasts while performing unicast operations to the network device, so that the network device configures the multicast broadcast service according to the capability information reported by the terminal device.
  • a way for a terminal device to report the ability to receive multicast broadcasts is to report mbms-MaxBW in capability information, where mbms-MaxBW indicates the maximum bandwidth supported by MBS reception.
  • the multicast capability information of the current LTE design is at the UE level, does not distinguish between bands and carriers, and only supports the reporting of the maximum bandwidth used for MBS.
  • the multicast service of existing NR may only be supported on a certain band of UE. If the multicast capability of LTE is reused, it will not be able to accurately report the multicast capability of UE in NR.
  • the embodiments of the present application provide a communication method and device, which are used to solve the problem of low accuracy in reporting the multicast capability of a terminal device.
  • the method and the device are based on the same inventive concept, and since the principles of the method and the device to solve problems are similar, the implementation of the device and the method can be referred to each other, and the repetition will not be repeated.
  • the communication method provided by this application can be applied to various communication systems, for example, it can be Internet of things (internet of things, IoT), narrowband Internet of things (narrow band internet of things, NB-IoT), long term evolution (long term evolution) , LTE), it can also be the fifth generation (5G) communication system, it can also be a hybrid architecture of LTE and 5G, it can also be a 5G new radio (new radio, NR) system, and new communication emerging in 6G or future communication development system etc.
  • the communication system described in this application may also be a machine to machine (machine to machine, M2M) network or other networks.
  • the communication system may include terminal equipment, access network equipment, and core network equipment.
  • a terminal device can receive a multicast service from an access network device.
  • the communication system may include a terminal device and two access network devices, which are access network device 1 and access network device 2 respectively.
  • a terminal device can receive a unicast service from an access network device 1 and a multicast service from an access network device 2, and the two services can share the baseband capability of the terminal device.
  • the access network device 1 and the access network device 2 may be connected to different core network devices, for example, the communication system may also include a core network device 1 and a core network device 2, wherein the access network device 1 is connected to the core network Device 1 and access network device 2 are connected to core network device 2, as shown in FIG. 6 .
  • the access network device 1 and the access network device 2 may also be connected to the same core network device.
  • the communication system includes a core network device 3, and both the access network device 1 and the access network device 2 are connected to the core network device 3.
  • the network architecture and business scenarios described in the embodiments of the present application are for more clearly illustrating the technical solutions of the embodiments of the present application, and do not constitute limitations on the technical solutions provided by the embodiments of the present application. With the evolution of architecture and the emergence of new business scenarios, the technical solutions provided by the embodiments of this application are also applicable to similar technical problems.
  • FIG. 7 it is a schematic flowchart of a communication method provided in the embodiment of the present application.
  • the terminal device determines capability information.
  • the capability information indicates the capability of receiving the multicast service corresponding to the band, and/or the capability of receiving the multicast service corresponding to the CC.
  • the multicast service may include a multicast service, a broadcast service, and the like.
  • the capability information indicates the capability of receiving the multicast service corresponding to the band. It can be understood that the capability information includes the capability of receiving the multicast service at the band level (per band). The capability information indicates the capability of receiving the multicast service corresponding to the CC. It can be understood that the capability information includes the capability of receiving the multicast service at the CC level (per CC).
  • the "ability to receive multicast services” can also be replaced with “capability to receive MBS services", “MBS capability”, “multicast capability”, “broadcast capability”, “ROM capability”, or “free Receiving (free to air, FTA) capability", etc., the embodiment of the present application takes “capability of receiving multicast service” as an example for description.
  • the capability information indicates the capability of receiving the multicast service corresponding to the band, and/or the capability of receiving the multicast service corresponding to the CC will be described in detail below.
  • step S801 may be an optional step, that is, the terminal device may not reflect the process of determining capability information.
  • the terminal device sends capability information to the access network device.
  • the access network device receives the capability information from the terminal device.
  • the access network device may send capability reporting indication information to the terminal device, where the capability reporting indication information instructs the terminal device to report the capability of receiving multicast services.
  • the capability report indication information instructs the terminal device to report the capability of receiving the multicast service. Specifically, the capability report indication information instructs the terminal device to report the capabilities corresponding to all bands supporting multicast services or the capabilities corresponding to all bands supporting multicast services contained in the current or designated PLMN.
  • the capability reporting indication information may be a value of one or more bits indicating whether to report. Alternatively, the capability reporting indication information may indicate whether to report by carrying one or more bits. Alternatively, the field in the capability report indication information indicates whether to report through true/false.
  • the capability report indication information instructs the terminal device to report the capability of receiving the multicast service.
  • the capability reporting indication information may carry the index or identification of one or more bands, and the capability reporting indication information instructs the terminal device to report the ability of the one or more bands to receive multicast services.
  • the access network device determines the capability of the terminal device according to the capability information.
  • the access network device may send the multicast service to the terminal device according to the capability information.
  • the terminal device sends capability information to the access network device, and the access network device can send a multicast service to the terminal device according to the capability information.
  • the access network device can configure the MRB of the multicast service according to the capability information, for example, the MRB can be configured through an RRC configuration message.
  • the access network device sends the multicast service after the MRB is configured, as shown in FIG. 8 .
  • the access network device may send the unicast service to the terminal device according to the capability information.
  • the terminal device sends capability information to the access network device 1, and the access network device 1 can send a unicast service to the terminal device according to the capability information.
  • the terminal device may also send indication information to the access network device, where the indication information indicates information about the multicast service that the terminal device is receiving or expects to receive, Such as session ID, used SCS, BW, frequency and other information.
  • the access network device can select a set of capability information sets supported by the terminal device according to the capability information and indication information reported by the terminal device, so that the unicast service can be sent to the terminal device without affecting the reception of multicast services by the terminal device.
  • the terminal device may also send indication information to the access network device, where the indication information may indicate the modulation order of the multicast service being received or expected to be received, for example, it may be indicated by an MBS interest indication (MBS interest indication, MII) The modulation order of the multicast service being received or expected to be received, etc.
  • MBS interest indication MBS interest indication
  • MII MBS interest indication
  • the indication information may also indicate at least one of the following information that the terminal device is receiving or expects to receive the multicast service: frequency information (such as bandwidth and/or frequency point, etc.), TMGI, and SCS.
  • the present application does not limit the name (or type) of the indication information.
  • the MII can also be replaced with other information indicating the service that the UE is interested in, such as user assistance information (user assistance information, UAI) and so on.
  • user assistance information user assistance information, UAI
  • UAI user assistance information
  • the triggering manner, sending manner and content of the MII may be independently implemented independently of the method described in FIG. 8 . If the triggering method, sending method, and content of the MII are implemented separately, the information indicated by the MII may include the content indicated by the above indication information, may not include the content indicated by the above indication information, or may include part of the information in the above indication information.
  • the terminal device may acquire the modulation order of the multicast service being received or expected to be received from multicast transmission logical channel (MTCH) configuration information.
  • MTCH multicast transmission logical channel
  • the terminal device may receive system information from the access network device, where the system information includes MCCH configuration information. And receive the MCCH according to the MCCH configuration information, and the MCCH includes the MTCH configuration information.
  • the terminal device may also acquire the modulation order of the multicast service being received or expected to be received from downlink control information (DCI). Specifically, the terminal device may report the obtained modulation order in real time, or may report the largest modulation order after obtaining n times.
  • DCI downlink control information
  • the modulation order may also be updated, for example, the updated modulation order of the multicast service being received or expected to be received is obtained from the DCI After counting, update to the access network device.
  • the terminal device sends capability information to the access network device 1, and the terminal device may send MII to the access network device 1, which indicates that the terminal device is receiving or Information about the multicast service expected to be received.
  • the access network device 1 may send a unicast service to the terminal device according to the capability information and MII reported by the terminal device.
  • the terminal device triggers the terminal device to report the MII (that is, the above indication information) by receiving the mbms-ROM-ServiceIndicatio in the SIB2 of the primary cell/primary serving cell (Pcell), but NR or the future In the communication, there may be no such information, so that the terminal device cannot be triggered to report the MII.
  • the present application provides three methods for triggering the terminal device to report the MII.
  • the first method is: the access network device sends fourth information to the terminal device to indicate whether to report the MII.
  • the fourth information may be used to indicate to report multicast services received across different PLMNs (inter-PLMNs) or different operators (inter-operators) or across base stations or non-serving cells (non-serving cells) or across frequencies.
  • the terminal device may determine whether to report the MII.
  • Four determination methods are introduced below, and it should be understood that these four methods can be implemented individually, or any two or three or four of them can be implemented in combination.
  • Determination method 1 When the terminal device meets any of the following conditions, it is determined that the MII needs to be reported:
  • Case 1 The PLMN in the TMGI of the received multicast service is inconsistent with the PLMN information contained in the SIB1 of the serving cell of the access network device.
  • Case 2 The PLMN included in the SIB1 of the cell receiving the multicast service is inconsistent with the PLMN included in the SIB1 of the serving cell of the access network device.
  • the "different" in determination method 1 can be understood as at least a part of the PLMN in the TMGI (or SIB1) of the received multicast service is different from the PLMN included in the SIB1 of the serving cell of the access network device.
  • the fourth information may be 1 or more bits.
  • Determination method 2 When the terminal device meets any of the following conditions, it is determined that the MII needs to be reported:
  • Case 3 the fourth information includes one or more PLMNs, and the PLMN in the TMGI of the received multicast service is different from the one or more PLMNs.
  • the fourth information includes one or more PLMNs, and the PLMN contained in the SIB1 of the cell receiving the multicast service is different from the one or more PLMNs.
  • determining method 2 can be understood as at least a part of the PLMN in the TMGI (or SIB1) of the received multicast service is different from any one of the one or more PLMNs.
  • Determination method 3 The terminal device can determine that it needs to report MII when one or more of the following conditions are met:
  • Determination method 4 The terminal device can determine that it needs to report the MII when the following conditions are met:
  • the indication information includes information of one or more frequency points, and the frequency point of the received multicast service is different from the one or more frequency points.
  • the above access network device may be the access network device 1 in the scenario shown in FIG. 6 , and the received multicast service may be from the access network device 2 .
  • the second method is: the protocol may stipulate that the serving cell of the access network device must send SIB21 to trigger the terminal device to report the MII.
  • the access network device may be the access network device 1 in the scenario shown in FIG. 6 .
  • the third method is: the terminal device can determine that the MII needs to be reported.
  • the terminal device may determine to report the multicast service received in an inter-PLMN (inter-PLMN) or inter-operator when the inter-PLMN or inter-operator is satisfied.
  • inter-PLMN inter-PLMN
  • inter-operator when the inter-PLMN or inter-operator is satisfied.
  • the terminal device may determine to report the multicast service received at the different frequency when the different frequency is satisfied.
  • the above describes three methods for triggering the terminal device to report the MII.
  • the content of the MII reported by the terminal device is introduced below in combination with the above three methods.
  • the terminal device can determine that it needs to report the MII according to the fourth information, and determine the frequency information (such as frequency point and/or bandwidth, etc.)/TMGI/SCS/modulation order included in the MII based on the fourth information etc.
  • the frequency information such as frequency point and/or bandwidth, etc.
  • the terminal device can determine that MII needs to be reported according to different operator/PLMN/frequency/non-serving cell, and determine the frequency information included in MII (such as frequency point and/or frequency point) according to operator/PLMN/frequency point bandwidth, etc.)/TMGI/SCS/modulation order, etc.
  • the terminal device can determine the need to report the MII according to SIB21, and determine the frequency information (such as frequency point and/or bandwidth, etc.)/TMGI/SCS/modulation order included in the MII based on the operator/PLMN/frequency point etc.
  • the terminal device can indicate the band (or band) level and/or CC level multicast capability through capability information, thereby improving the accuracy of multicast capability reporting, so that the access network device can obtain refined capability information.
  • the access network device can provide multicast service and/or unicast service according to refined capability information, for example, can configure or select the multicast service and/or unicast service according to refined capability information communication parameters.
  • the capability information indicates the capability of receiving the multicast service corresponding to the band and/or the capability of receiving the multicast service corresponding to the CC will be introduced below in combination with the structure of the capability information.
  • the band combination information in the capability information may be used to indicate the capability of receiving the multicast service corresponding to the band, and/or the capability of receiving the multicast service corresponding to the CC, or, the
  • the frequency band information indicates the capability of receiving multicast services corresponding to the band.
  • the following will respectively introduce examples of indicating the ability of receiving multicast services corresponding to the band through the frequency band combination information, and/or examples of the ability of receiving multicast services corresponding to the CC, and indicating the ability of receiving multicast services corresponding to the band through the frequency band information example of .
  • capability information includes Band Combination Lists, including Band Lists and Feature Sets Combinations.
  • the Band Lists in the Band Combination Lists can be used to list the bands that support receiving multicast services, and the Feature Sets Combination corresponding to the Band List can indicate the ability to receive multicast services on the bands that support receiving multicast services .
  • the capability information includes a first frequency band combination list and an identifier of the first feature set combination.
  • the first frequency band combination list includes first frequency band information
  • the first frequency band information includes identifiers of N bands that support receiving multicast services, where N is an integer greater than 0.
  • the first feature set combination includes at least one first parameter set corresponding to the first frequency band combination list, any first parameter set indicates the ability to receive multicast services corresponding to N bands, and/or, each of the N bands Capability of receiving multicast services corresponding to the CC on the band.
  • N can be 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 and so on.
  • the network device may indicate the number N of frequency bands supporting the multicast service reported by the terminal device, or also indicate the maximum number of frequency bands supporting the multicast service reported by the terminal device.
  • the first frequency band combination list may also include second frequency band information, and the second frequency band information includes identifiers of M bands supporting unicast services, where M is an integer greater than 0; any first parameter set also indicates M The capabilities of receiving unicast services corresponding to each of the bands, or, any first parameter set also indicates the capabilities of receiving communication services corresponding to the M bands respectively, and the communication services include unicast services and multicast services.
  • the first frequency band combination list lists identifiers of M bands that the terminal device supports unicast services and identifiers of N bands that support multicast services.
  • the bands are distinguished according to the communication services supported on the band. If the terminal device supports receiving multicast services on a band, the first frequency band information includes the identification of the band. If the terminal device supports receiving unicast services on a band , the second frequency band information includes the band identifier. If a band supports receiving both multicast services and unicast services, the band identifier is included in the first frequency band information and the second frequency band information, that is, the band identifier appears twice in the first frequency band combination list.
  • the structure of the capability information may be: the capability information includes the first frequency band combination list and the identifier of the first characteristic set combination.
  • the first frequency band combination list includes identifications of N bands supporting reception of multicast services and identifications of M bands supporting reception of unicast services, wherein, if a band supports reception of multicast services and unicast services, the identification of the band Appears twice in the first band combination list.
  • the first feature set combination includes matrix elements of multiple feature set indexes (featuresetID), and each feature set index is associated with a band. Wherein, each row of feature set index can be regarded as a first parameter set, and each row of feature set index, that is, the first parameter set, represents the feature set combination supported by the terminal device on this band combination.
  • Each row of feature set indexes in the first feature set combination, that is, each first parameter set may include feature set indexes corresponding to the above N bands, and may also include feature set indexes corresponding to the above M bands.
  • the feature set index corresponding to each band in the N bands corresponds to a group of communication parameters, and is used to indicate the capability of the terminal device to receive multicast services on this band.
  • the feature set index corresponding to each band in the M bands corresponds to a set of communication parameters, which are used to indicate the ability of the terminal device to receive unicast services on this band, or to indicate the ability of the terminal device to receive communication services on this band
  • the communication service includes a unicast service and a multicast service, and may also include other services, which are not specifically limited here.
  • the feature set index corresponding to the M bands may include two parts, namely an uplink feature set index and a downlink feature set index.
  • the uplink feature set index may correspond to a group of communication parameters, where the group of communication parameters may include communication parameters at the band level and communication parameters at the CC level.
  • the communication parameters at the band level are used to indicate the capability of performing uplink transmission on the band.
  • Communication parameters at the CC level are used to indicate the capability of uplink transmission on the CC.
  • the downlink feature set index may correspond to a group of communication parameters, where the group of communication parameters may include communication parameters at the band level and communication parameters at the CC level.
  • the communication parameters at the band level are used to indicate the ability to receive unicast services on the band.
  • Communication parameters at the CC level are used to indicate the ability to receive unicast services on the band.
  • the band-level communication parameters are used to indicate the capability of receiving communication services on the band.
  • Communication parameters at the CC level are used to indicate the ability to receive communication services on the CC.
  • the feature set indexes corresponding to the N bands may include downlink feature set indexes.
  • the downlink feature set index may correspond to a group of communication parameters, where the group of communication parameters may include communication parameters at the band level and communication parameters at the CC level.
  • the communication parameters at the band level are used to indicate the ability to receive multicast services on the band.
  • Communication parameters at the CC level are used to indicate the ability to receive multicast services on the band.
  • the band-level communication parameters included in the communication parameters corresponding to the uplink characteristic set indexes of M bands may include at least one of the following types of communication parameters: SCS, BW, multiple-input multiple-output (MIMO) layer number ( MIMO layers), modulation order (ModulationOrder), etc.
  • SCS single-input multiple-output
  • BW multiple-input multiple-output
  • MIMO multiple-input multiple-output
  • MIMO layers modulation order
  • ModulationOrder modulation order
  • the band-level communication parameters included in the communication parameters corresponding to the downlink characteristic set indexes of the N bands further include: a flag supporting receiving multicast services.
  • the CC-level communication parameters included in the communication parameters corresponding to the index may include at least one of the following types of communication parameters: SCS corresponding to the CC, BW corresponding to the CC, MIMO layers corresponding to the CC, ModulationOrder corresponding to the CC, etc.
  • the communication parameters at the CC level included in the communication parameters corresponding to the downlink characteristic set indexes of the N bands may also be a capability value, and the capability value may be determined according to parameters such as the above-mentioned SCS.
  • the capability value may be a weighted sum of SCS, BW, MIMO layers, and ModulationOrder.
  • the capability value may be the product of SCS, BW, MIMO layers and ModulationOrder.
  • the ability value may also be determined according to other calculation methods, which are not specifically limited here.
  • the CC-level communication parameters included in the communication parameters corresponding to the downlink characteristic set indexes of N bands also include: a flag that supports receiving multicast services.
  • Example 1 is illustrated below in combination with specific examples.
  • the structure of the capability information can be shown in Table 1.
  • Example 1 is described in conjunction with the above Table 1, which shows the band combination information in the capability information, that is, Band Combination Lists.
  • Band list 1 is the first frequency band combination list, through the first frequency band combination list can indicate the identification of N bands that support receiving multicast services and the identification of M bands that support unicast services.
  • band B and Band C supports multicast services
  • band A and band B are examples.
  • featureSetCombinationID 1 is the identifier of the first feature set combination
  • the first feature set combination includes at least one first parameter set corresponding to the first frequency band combination list, where each square bracket represents a first parameter set, indicating that the terminal device is in the band combination A capability supported by the above.
  • the parentheses in the same square brackets in turn identify the feature set corresponding to each band in the frequency band combination list. For example, the first parenthesis in each square bracket identifies the feature set corresponding to band A, the second parenthesis identifies the feature set corresponding to band B, and the third parenthesis identifies the feature set corresponding to band B for receiving multicast services , the fourth parenthesis identifies the feature set for receiving multicast services corresponding to band C.
  • each parenthesis is feature set indexes, where fsul indicates the feature set corresponding to the uplink, fsdl indicates the feature set corresponding to the downlink, and n1, n2, etc. are index values, that is, fsul_n1 indicates that the feature set corresponding to the uplink is an index value
  • fsul_n1 indicates that the feature set corresponding to the uplink is an index value
  • the communication parameter corresponding to n1, fsdl_n1 indicates that the feature set corresponding to the downlink is the communication parameter corresponding to the index value n1.
  • the content indicated by each feature set index corresponds to the same structure.
  • fsdl_n1 corresponds to: communication parameters at the band level, namely Per band parameters, and communication parameters at the CC level, namely Per CC parameters .
  • Per CC parameters specifically includes the feature set identifier corresponding to CC, for example, the feature set identifier fsdlperCC_n1 corresponding to CC1 and the feature set identifier fsdlperCC_n2 corresponding to CC2.
  • the feature set identifier corresponding to the CC may indicate the communication parameters corresponding to the CC, for example, it may be the SCS, BW, MIMO layers, ModulationOrder, etc. corresponding to the CC. For another example, it may be the capability value corresponding to the CC.
  • one or more bits in the capability query can be used to trigger the terminal device to report the capability combination of band B and band C for receiving multicast services, or one or more bits in the capability query can be used to trigger the reporting of the band B's ability to receive multicast services (wherein, band B can be a band of the same PLMN or another PLMN's band), and can also trigger the terminal device to report receiving multicast by including band B and C in the MBS band filter list in the capability query Combination of service band B and C capabilities.
  • the capability information includes a second frequency band combination list and an identifier of a second feature set combination; wherein, the second frequency band combination list includes identifiers of N bands that support receiving multicast services, and N is an integer greater than 0; the second characteristic The set combination includes Q1 group parameters corresponding to the second frequency band combination list, where each group of parameters includes Q2 second parameter sets, and any second parameter set indicates the ability to receive multicast services corresponding to N bands, and/or , the capability of receiving multicast services corresponding to the CCs on each of the N bands, Q1 is an integer greater than 0, and Q2 is an integer greater than 0.
  • the capability information also includes a third frequency band combination list, where the third frequency band combination list includes identifiers of M bands that support receiving unicast services, and M is an integer greater than 0; the second feature set combination also includes the third Q2 third parameter sets corresponding to the frequency band combination list, any third parameter set indicates the capability of receiving unicast services corresponding to M bands respectively; wherein, the i-th second parameter set in the Q2 second parameter sets is the same as Q1 Corresponds to the i-th first parameter set in any group of parameters in the group of parameters, where i is an integer greater than 0 and not greater than Q2.
  • the combination of the i-th second parameter set in the Q2 second parameter set and the i-th first parameter set in any set of parameters in the Q1 group of parameters can represent the features supported by the terminal device on this band combination set combination
  • the band combination is the band combination obtained by combining the second frequency band combination list and the third frequency band combination list.
  • the second frequency band combination list lists identifiers of N bands in which the terminal equipment supports receiving multicast services
  • the third frequency band combination list lists identifiers of M bands in which the terminal equipment supports receiving unicast services.
  • the bands are distinguished according to the communication services supported on the bands. If the terminal device supports receiving multicast services on a band, then include the identification of the band in the second frequency band combination list; if the terminal device supports receiving unicast services on a band, then include the identification of the band in the third frequency band combination list logo. If a band supports receiving both multicast services and unicast services, the identifier of the band is included in the second frequency band combination list and the third frequency band combination list.
  • the structure of the capability information may be: the capability information includes the second frequency band combination list, the third frequency band combination list, and the identifier of the second feature set combination.
  • the second frequency band combination list includes identifiers of N bands that support receiving multicast services
  • the third frequency band combination list includes identifiers of M bands that support receiving unicast services.
  • the identifier of the band is included in the second frequency band combination list and the third frequency band combination list.
  • the second property set combination includes the first matrix and at least one extended matrix.
  • the first matrix includes a plurality of matrix elements of feature set indexes (featuresetID), and each feature set index is associated with one of the M bands.
  • each row of feature set index can be regarded as a third parameter set.
  • the feature set index of each row of the first matrix, that is, each third parameter set includes the feature set index corresponding to the above M bands.
  • the feature set index corresponding to each band in the M bands corresponds to a set of communication parameters, which is used to indicate the ability of the terminal device to receive unicast services on this band, or to indicate that the terminal device receives communication services on this band capability, the communication service includes unicast service and multicast service.
  • Each extended matrix includes matrix elements of multiple feature set indexes (featuresetID), and each feature set index is associated with one of the N bands.
  • feature set index of each row of each extended matrix can be regarded as a second parameter set.
  • the feature set index of each row of each extended matrix, that is, each second parameter set includes the feature set index corresponding to the above N bands.
  • the feature set index corresponding to each band in the N bands corresponds to a group of communication parameters, and is used to indicate the capability of the terminal device to receive multicast services on this band.
  • the i-th line feature set index of the first matrix can be combined with the i-th line feature set index of an extended matrix, and the feature set combination obtained by combining can represent the feature set combination supported by the terminal device on this band combination, and the band combination is A band combination obtained by combining the second frequency band combination list and the third frequency band combination list.
  • Example 2 is illustrated below in combination with specific examples.
  • the structure of the capability information can be shown in Table 2.
  • Example 2 is described in conjunction with Table 2 above.
  • Table 2 shows the band combination information in the capability information, that is, Band Combination Lists.
  • Band list extend is the second frequency band combination list, and can indicate the identifiers of N bands that support receiving multicast services through the second frequency band combination list.
  • band B and band C support multicast services as an example.
  • Band list 1 is the third frequency band combination list, through the second frequency band combination list can indicate the identifiers of M bands that support receiving unicast services.
  • band A and band B support unicast services as an example.
  • featureSetCombinationID 1 is the identifier of the second feature set combination, and the second feature set combination includes Q2 third parameter sets corresponding to Band list 1.
  • the second feature set combination includes the first matrix
  • the first parenthesis in each square bracket identifies the feature set corresponding to band A
  • the second parenthesis identifies the feature set corresponding to band B.
  • the second feature set combination also includes a Q1 group of parameters corresponding to the Band list extend, where each group of parameters includes Q2 second parameter sets.
  • each group of parameters includes Q2 second parameter sets.
  • the first parenthesis in each square bracket identifies the feature set for receiving multicast services corresponding to band B
  • the second parenthesis identifies the feature set for receiving multicast services corresponding to band C.
  • the square brackets in the first matrix and the square brackets in each extended matrix correspond one-to-one according to the rows where they are located.
  • the extended matrix 1 the first row in the first matrix is the first square bracket and the extended The first row in the matrix corresponds to the first square bracket.
  • the square brackets with a corresponding relationship can be combined to indicate the combination of feature sets supported by the terminal device on this band combination.
  • the band combination is the band combination obtained by combining Band list extend and Band list 1.
  • the row numbers of the first matrix and the extended matrix are the same. That is, the number of the third parameter set included in the first matrix is the same as the number of the second parameter set included in the extended matrix.
  • Example 2 the combination of the first matrix and the extended matrix can reduce the signaling overhead of capability reporting, and for the unicast capability part, the existing mechanism can be reused to the greatest extent, and the protocol changes are minor.
  • one or more bits in the capability query can be used to trigger the terminal device to report the capability combination of band B and band C for receiving multicast services, or one or more bits in the capability query can be used to trigger the reporting of the band
  • the ability of B to receive multicast services (wherein, band B can be the band of the same PLMN or the band of other PLMNs), can also trigger the terminal device to report receiving multicast services by including band B and C in the MBS band filter list in the capability query A combination of the capabilities of bandB and C.
  • the capability information includes a second frequency band combination list and identifications of Q1 third feature set combinations; wherein, the second frequency band combination list includes identifications of N bands that support receiving multicast services, and N is an integer greater than 0; any A third feature set combination includes Q2 fourth parameter sets, any fourth parameter set indicates the ability to receive multicast services corresponding to N bands, and/or, the corresponding reception capability of CC on each of the N bands Multicast service capability, Q1 is an integer greater than 0, and Q2 is an integer greater than 0.
  • the capability information may list the identifiers of Q1 combinations of the third feature sets, or the capability information may also include extended information, and the extended information may correspond to the identifiers of the Q1 combinations of the third feature sets.
  • the capability information further includes a third frequency band combination list and an identifier of a fourth feature set combination, where the third frequency band combination includes identifiers of M bands that support receiving unicast services, and M is an integer greater than 0; the fourth The feature set combination includes Q2 fifth parameter sets, and any fifth parameter set indicates the capability of receiving unicast services corresponding to the M bands respectively.
  • the i-th fifth parameter set in the fourth characteristic set combination corresponds to each fourth parameter combination in the i-th third characteristic set combination, where i is an integer greater than 0 and not greater than Q2.
  • the combination of the i-th fifth parameter set in the fourth feature set combination and any fourth parameter set in the i-th third feature set combination may indicate the feature set combination supported by the terminal device on this band combination
  • the band combination is the band combination obtained by combining the second frequency band combination list and the third frequency band combination list.
  • the second frequency band combination list lists identifiers of N bands that the terminal device supports receiving multicast services
  • the third frequency band combination list lists identifiers of M bands that the terminal device supports receiving unicast services.
  • the bands are distinguished according to the communication services supported on the bands. If the terminal device supports receiving multicast services on a band, then include the identification of the band in the second frequency band combination list; if the terminal device supports receiving unicast services on a band, then include the identification of the band in the third frequency band combination list logo. If a band supports receiving both multicast services and unicast services, the identifier of the band is included in the second frequency band combination list and the third frequency band combination list.
  • the structure of the capability information may be: the capability information includes a second frequency band combination list, a third frequency band combination list, identifiers of Q1 third characteristic set combinations, and an identifier of the fourth characteristic set combination.
  • the second frequency band combination list includes identifiers of N bands that support receiving multicast services
  • the third frequency band combination list includes identifiers of M bands that support receiving unicast services.
  • the identifier of the band is included in the second frequency band combination list and the third frequency band combination list.
  • each third property set combination includes matrix elements of multiple property set indices, and each property set index is associated with one band in the N bands.
  • the attribute set index of each row of each third attribute set combination can be regarded as a fifth parameter set.
  • Each row of feature set indexes of each third feature set combination, that is, each fifth parameter set includes feature set indexes corresponding to the N bands.
  • the feature set index corresponding to each band in the N bands corresponds to a group of communication parameters, and is used to indicate the capability of the terminal device to receive multicast services on this band.
  • the fourth property set combination includes a plurality of matrix elements of property set indices, and each property set index is associated with one of the M bands.
  • each row of feature set index can be regarded as a fourth parameter set.
  • Each row of feature set indexes in the fourth feature set combination, that is, each fourth parameter set includes the feature set indexes corresponding to the above M bands.
  • the feature set index corresponding to each band in the M bands corresponds to a set of communication parameters, which is used to indicate the ability of the terminal device to receive unicast services on this band, or to indicate that the terminal device receives communication services on this band capability, the communication service includes unicast service and multicast service.
  • the i-th feature set index combination in the fourth feature set combination and any line feature set index in the i-th third feature set combination can indicate the feature set combination supported by the terminal device on this band combination, and the band combination is the first A band combination obtained by combining the second frequency band combination list and the third frequency band combination list.
  • Example 3 is illustrated below in combination with specific examples.
  • the structure of the capability information can be shown in Table 3a.
  • the number of rows included in the feature set combination corresponding to featureSetCombinationID 1 can be understood as the number of parameter sets included in the feature set combination corresponding to featureSetCombinationID 1.
  • the number of rows included in the feature set combination corresponding to featureSetCombination_extend ID 1 can be understood as the number of parameter sets included in the feature set combination corresponding to featureSetCombination_extend ID 1.
  • the number of rows included in the feature set combination corresponding to featureSetCombination_extend ID 2 can be understood as the number of parameter sets included in the feature set combination corresponding to featureSetCombination_extend ID 1.
  • the number of rows included in the feature set combination corresponding to featureSetCombination_extend ID 3 can be understood as the number of parameter sets included in the feature set combination corresponding to featureSetCombination_extend ID 1.
  • Example 3 is described in conjunction with the above Table 3a, which is Band Combination Lists in the capability information.
  • Band list extend is the second frequency band combination list, through which the second frequency band combination list can indicate the identifiers of N bands that support receiving multicast services.
  • band B and band C support multicast services as an example.
  • Band list 1 is the third frequency band combination list, through the second frequency band combination list can indicate the identifiers of M bands that support receiving unicast services.
  • band A and band B support unicast services as an example.
  • featureSetCombinationID 1 is the identifier of the fourth feature set combination, and the fourth feature set combination includes Q2 third parameter sets corresponding to Band list 1.
  • the first parenthesis in each square bracket identifies the feature set corresponding to band A
  • the second parenthesis identifies the feature set corresponding to band B.
  • each third characteristic set combination includes Q2 second parameter sets.
  • the parentheses in the brackets identify the feature set for receiving multicast services corresponding to each band in the Band list extend. For example, the first parenthesis in each square bracket identifies the feature set for receiving multicast services corresponding to band B, and the second parenthesis identifies the feature set for receiving multicast services corresponding to band C.
  • the first square bracket in the fourth feature set combination can be combined with the first third feature set, that is, each square bracket combination included in the third feature set combination corresponding to index 1 in the featureSetCombination_extend ID list.
  • the second square bracket in the fourth feature set combination can be combined with the second third feature set, that is, each square bracket combination included in the third feature set combination corresponding to index 2 in the featureSetCombination_extend ID list.
  • the third square bracket in the fourth feature set combination can be combined with the third third feature set, that is, each square bracket combination included in the third feature set combination corresponding to index 3 in the featureSetCombination_extend ID list.
  • the first square bracket in the fourth feature set combination is the first in the third feature set combination corresponding to the index of 1 in the featureSetCombination_extend ID list
  • the combination of brackets indicates a feature set combination supported by the terminal device on this band combination
  • the band combination is the band combination obtained by combining Band list extend and Band list 1.
  • the first square bracket combination in the fourth feature set combination and the second square bracket combination in the third feature set combination corresponding to the index 1 in the featureSetCombination_extend ID list indicate a feature set combination supported by the terminal device on this band combination.
  • the band combination is the band combination obtained by combining Band list extend and Band list 1. and so on.
  • the structure of the capability information may be: the capability information includes the identifier of the second frequency band combination list, the third frequency band combination list, and the fourth characteristic set combination.
  • the second frequency band combination list includes identifications of N bands supporting reception of multicast services
  • the third frequency band combination list includes identifications of M bands supporting reception of unicast services.
  • the identifier of the band is included in the second frequency band combination list and the third frequency band combination list.
  • the fourth property set combination includes a plurality of matrix elements of property set indices, and each property set index is associated with one of the M bands.
  • each row of feature set index can be regarded as a fourth parameter set.
  • Each row of feature set indexes in the fourth feature set combination, that is, each fourth parameter set includes the feature set indexes corresponding to the above M bands.
  • the feature set index corresponding to each band in the M bands corresponds to a set of communication parameters, which is used to indicate the ability of the terminal device to receive unicast services on this band, or to indicate that the terminal device receives communication services on this band capability, the communication service includes unicast service and multicast service.
  • the fourth characteristic set combination may also indicate the third characteristic set combination corresponding to (or called by) the characteristic set index in each row.
  • each third property set combination includes matrix elements of multiple property set indices, and each property set index is associated with one band in the N bands.
  • the attribute set index of each row of each third attribute set combination can be regarded as a fifth parameter set.
  • Each row of feature set indexes of each third feature set combination, that is, each fifth parameter set includes feature set indexes corresponding to the N bands.
  • the feature set index corresponding to each band in the N bands corresponds to a group of communication parameters, and is used to indicate the capability of the terminal device to receive multicast services on this band.
  • the combination of a row of feature set index and any row of feature set index in the corresponding third feature set combination can indicate the feature set combination supported by the terminal device on this band combination.
  • the band combination is the second frequency band combination list and the third frequency band The band combination obtained by combining lists.
  • Example 3 is illustrated below in combination with specific examples.
  • the structure of the capability information can be shown in Table 3b.
  • the number of rows included in the feature set combination corresponding to featureSetCombinationID 1 can be understood as the number of parameter sets included in the feature set combination corresponding to featureSetCombinationID 1.
  • the number of rows included in the feature set combination corresponding to featureSetCombination_extend ID 1 can be understood as the number of parameter sets included in the feature set combination corresponding to featureSetCombination_extend ID 1.
  • the number of rows included in the feature set combination corresponding to featureSetCombination_extend ID 2 can be understood as the number of parameter sets included in the feature set combination corresponding to featureSetCombination_extend ID 2.
  • the number of rows included in the feature set combination corresponding to featureSetCombination_extend ID 3 can be understood as the number of parameter sets included in the feature set combination corresponding to featureSetCombination_extend ID 3.
  • Example 3 is described in conjunction with the above Table 3b, which is Band Combination Lists, which is the frequency band combination information in the capability information.
  • Band list extend is the second frequency band combination list, through the second frequency band combination list, it can indicate the identifiers of N bands that support receiving multicast services.
  • band B and band C support multicast services as an example.
  • Band list 1 is the third frequency band combination list. Through the second frequency band combination list, the identifiers of M bands that support receiving unicast services can be indicated.
  • band A and band B support unicast services as an example.
  • the first parenthesis in each square bracket identifies the capability of receiving unicast services corresponding to band A
  • the second parenthesis identifies the capability of receiving unicast services corresponding to band B.
  • the first parenthesis in each square bracket identifies the capability of receiving communication services corresponding to band A.
  • the capability of receiving communication services corresponding to band A may include receiving Capability of unicast service; the second parenthesis identifies the capability of receiving communication service corresponding to band B. Since the terminal device supports receiving unicast service and multicast service on band B, the capability of receiving communication service corresponding to band B can be Includes the ability to receive unicast traffic and receive multicast traffic.
  • Each square bracket also includes the third feature set combination corresponding to the square bracket.
  • the first square bracket includes featureSetCombination_extend ID 1, indicating that the square bracket corresponds to the third feature set combination corresponding to featureSetCombination_extend ID 1.
  • the first parenthesis in each square bracket identifies the capability of receiving multicast services corresponding to band B
  • the second parenthesis identifies the capability of receiving multicast services corresponding to band C.
  • the first square bracket in the fourth feature set combination can be combined with the first third feature set, that is, each square bracket combination included in the third feature set combination corresponding to featureSetCombination_extend ID 1.
  • the second square bracket in the fourth feature set combination can be combined with the second third feature set, that is, every square bracket combination included in the third feature set combination corresponding to featureSetCombination_extend ID 2.
  • the third square bracket in the fourth feature set combination can be combined with the third third feature set, that is, every square bracket combination included in the third feature set combination corresponding to featureSetCombination_extend ID 3.
  • the first square bracket combination in the fourth feature set combination and the first square bracket combination in the third feature set combination corresponding to featureSetCombination_extend ID 1 indicate that the terminal device is in this A feature set combination supported by band combination
  • the band combination is the band combination obtained by combining Band list extend and Band list 1.
  • the first square bracket combination in the fourth feature set combination and the second square bracket combination in the third feature set combination corresponding to featureSetCombination_extend ID 1 indicate a feature set combination supported by the terminal device on this band combination.
  • the band combination That is, the band combination obtained by combining Band list extend and Band list 1. and so on.
  • Example 3 the combination of the combination of the fourth feature set and the third feature set combination can reduce the signaling overhead of capability reporting, and for the unicast capability part, the existing mechanism can be reused to the greatest extent. The changes to the protocol are minor.
  • the capability information includes the fourth frequency band combination list and the identification of the fifth feature set combination; wherein, the fourth frequency band combination list includes the identification of X bands supported by the terminal device, and X is an integer greater than 0; the fifth feature set combination Including at least one sixth parameter set, any sixth parameter set indicates the communication parameters corresponding to the X bands, wherein the X bands include N bands that support receiving multicast services, and the communication corresponding to any band in the N bands
  • the parameter indicates the capability of receiving multicast services corresponding to the band, and/or the communication capability corresponding to the CC on the band, wherein, if the CC supports receiving multicast services, the communication capability corresponding to the CC is the capability of receiving multicast services corresponding to the CC, N is an integer greater than 0 and not greater than X.
  • the fourth frequency band combination list lists the identifiers of X bands supported by the terminal device. It does not distinguish whether multicast is supported here. As long as the terminal device supports communication on a band, the band is included in the fourth frequency band combination list logo. If a band supports receiving both multicast services and unicast services, the band's identifier appears once in the fourth frequency band combination list.
  • the structure of the capability information may be: the capability information includes the fourth frequency band combination list and the identifier of the fifth characteristic set combination.
  • the fourth frequency band combination list includes identifications of X bands supported by the terminal device, wherein, if a band supports receiving multicast services and unicast services, the band identification appears once in the fourth frequency band combination list.
  • the fifth feature set combination includes matrix elements of multiple feature set indexes (featuresetID), and each feature set index is associated with a band.
  • featuresetID matrix elements of multiple feature set indexes
  • each feature set index is associated with a band.
  • each row of feature set index can be regarded as a sixth parameter set, and each row of feature set index, that is, each sixth parameter set represents the feature set combination supported by the terminal device on this band combination.
  • Each row of feature set indexes in the fifth feature set combination, that is, each sixth parameter set may include feature set indexes corresponding to the aforementioned X bands.
  • the feature set index corresponding to each band in the X bands corresponds to a set of communication parameters, and is used to indicate the capability of the terminal device to communicate on this band.
  • the feature set index corresponding to the X bands may include two parts, namely an uplink feature set index and a downlink feature set index.
  • the uplink feature set index may correspond to a group of communication parameters, where the group of communication parameters may include communication parameters at the band level and communication parameters at the CC level. In this group of communication parameters, the communication parameters at the band level are used to indicate the capability of performing uplink transmission on the band. Communication parameters at the CC level are used to indicate the capability of uplink transmission on the band.
  • the downlink feature set index may correspond to a group of communication parameters, where the group of communication parameters may include communication parameters at the band level and communication parameters at the CC level.
  • the communication parameters at the band level are used to indicate the ability to receive communication services on the band.
  • Communication parameters at the CC level are used to indicate the ability to receive communication services on the CC.
  • the uplink feature set index corresponding to the band may be the first feature set index, and the first feature set index indicates that it does not support.
  • the communication parameters corresponding to the downlink feature set index corresponding to the band can indicate the capability of the terminal device to receive multicast services on the band, which may specifically include at least one of the following: band level Communication parameters for receiving multicast services at the CC level, and communication parameters for receiving multicast services at the CC level.
  • the communication parameters for receiving multicast services at the band level may include at least one of the following types of communication parameters: a flag supporting multicast service reception, SCS, BW, MIMO layers, ModulationOrder, and the like.
  • the communication parameters for receiving multicast services at the CC level may include at least one of the following types of communication parameters: a flag supporting multicast service reception, SCS, BW, MIMO layers, ModulationOrder, etc.
  • Example 4 is illustrated below in combination with specific examples.
  • the structure of the capability information can be shown in Table 4.
  • Example 4 is described in conjunction with the above Table 4, which is the band combination information in the capability information, that is, Band Combination Lists.
  • Band list 1 is the fourth frequency band combination list, through which the fourth frequency band combination list can indicate the identifiers of the X bands supported by the terminal device. It should be noted that Band list 1 does not distinguish whether the band supports multicast services.
  • featureSetCombinationID 1 is the identifier of the fifth feature set combination, and the fifth feature set combination includes at least one sixth parameter set corresponding to Band list 1.
  • each square bracket represents a sixth parameter set, indicating a capability supported by the terminal device in band combination.
  • the parentheses in the same square brackets in turn identify the feature set corresponding to each band in the frequency band combination list. For example, the first parenthesis in each square bracket identifies the feature set corresponding to band A, the second parenthesis identifies the feature set corresponding to band B, and the third parenthesis identifies the feature set corresponding to band C.
  • the elements included in each parenthesis are feature set indexes, where fsul indicates the feature set corresponding to the uplink, fsdl indicates the feature set corresponding to the downlink, and n1, n2, etc. are index values, that is, fsul_n1 indicates that the feature set corresponding to the uplink is an index value
  • fsul_n1 indicates that the feature set corresponding to the uplink is an index value
  • the communication parameter corresponding to n1, fsdl_n1 indicates that the feature set corresponding to the downlink is the communication parameter corresponding to the index value n1.
  • the content indicated by each property set index corresponds to the same structure.
  • fsdl_n1 corresponds to: band-level communication parameters, namely Per band parameters and CC-level communication parameters, namely Per CC parameters.
  • Per CC parameters specifically includes the feature set identifier corresponding to CC, for example, the feature set identifier fsdlperCC_n1 corresponding to CC1 and the feature set identifier fsdlperCC_n2 corresponding to CC2. If the band supports receiving multicast services, Per band parameters may include communication parameters for receiving multicast services.
  • the feature set identifier corresponding to the CC may indicate the communication parameters corresponding to the CC, for example, it may be the SCS, BW, MIMO layers, ModulationOrder, etc. corresponding to the CC. If the CC supports receiving multicast services, the communication parameters indicated by the feature set identifier corresponding to the CC may include communication parameters for receiving multicast services.
  • Example 4 the ability to receive multicast services is indicated by the communication parameters corresponding to the feature set index, which can reduce the signaling overhead of capability reporting, and for the unicast capability part, the existing mechanism can be reused to the greatest extent, and the modification of the protocol is relatively small. Small.
  • the refined capability design of the CC level within the band can be realized, the accuracy of capability reporting can be improved, and the protocol changes are minor.
  • the downlink feature set index can be divided according to the supported communication services.
  • the first index set is used to support receiving multicast services. band.
  • the second index set is used for bands that do not support receiving multicast services.
  • the first index set may include feature set indexes in the first index range, such as feature set indexes in the range of 201-300.
  • the second index set may include feature set indexes in a second index range, for example, feature set indexes in a range of 101-200.
  • the index of the communication parameter of any band in the X bands can specifically be the index of the downlink feature set that satisfies: if the band supports receiving multicast services, the index of the communication parameter corresponding to the band, namely the downlink feature set index, belongs to the first index set; if The band does not support receiving multicast services, and the index of the communication parameter corresponding to the band, that is, the downlink characteristic set index belongs to the second index set.
  • the access network device can determine whether the band supports receiving and broadcasting services according to the set where the downlink feature set index of the band is located.
  • the band if the downlink feature set index of the band belongs to For the first index set, it can be determined that the band supports receiving and broadcasting services, and if the downlink feature set index of the band belongs to the second index set, it can be determined that the band does not support receiving and broadcasting services.
  • the communication parameter corresponding to any of the X bands indicates the communication capability corresponding to the CC on the band, which is realized in the following way: the communication parameter corresponding to any of the X bands includes the CC on the band The index of the corresponding communication capability.
  • the communication capability indexes corresponding to CCs may also be divided according to supported communication services, for example, the third index set is used for CCs that support receiving multicast services.
  • the fourth index set is used for CCs that do not support receiving multicast services.
  • the third set of indexes may include a third range of indexes.
  • the fourth set of indices may include a fourth range of indices.
  • the communication capability index corresponding to any CC of any band in the X bands satisfies: if the CC supports receiving multicast services, the communication parameter index corresponding to the CC belongs to the third index set; if the CC does not support receiving multicast services, The index of the communication parameter corresponding to the CC belongs to the fourth index set.
  • the access network device can determine whether the CC supports receiving broadcast services according to the set of the index corresponding to the CC.
  • the index of the CC belongs to the third index set. Then it can be determined that the CC supports reception of the broadcast service, and if the index of the CC belongs to the fourth index set, it can be determined that the CC does not support the reception of the broadcast service.
  • the capability information includes frequency band information, that is, Band Lists.
  • the bands that support receiving multicast services can be listed in Band Lists, and the communication parameters corresponding to the bands indicate the ability to receive multicast services on the bands that support receiving multicast services.
  • the communication parameters include: support for receiving multicast services, modulation order for receiving multicast services, SCS and BW for receiving multicast services, etc.
  • the capability information may be as shown in Table 5.
  • the Band List can include the bands of X supported by the terminal equipment, and the communication parameters corresponding to each band. Wherein, if the band supports receiving multicast services, the communication parameters corresponding to the band include the flag supporting receiving multicast services, receiving multicast services The modulation order of the broadcast service, the SCS and BW for receiving the multicast service, etc.
  • the ability to receive multicast services at the band level can be indicated, and the modification to the protocol is minor.
  • method 2 can be used to indicate the band that supports receiving multicast services, and can also indicate the band that receives multicast services on the band.
  • a part of communication parameters indicates another part of communication parameters for receiving multicast services on the band.
  • the communication parameters corresponding to band A in the Band List may include: a flag that supports receiving multicast services, and may also include the modulation order for receiving multicast services on band A.
  • use featureSetCombination to indicate other communication parameters for receiving multicast services on band A, for example, SCS, BW, etc.
  • band A for receiving multicast services on band A, and for example, other communication parameters for receiving multicast services at the CC level on band A.
  • the manner of instructing band A to receive other communication parameters of the multicast service through featureSetCombination can refer to the above-mentioned examples 1 to 4, and will not be repeated here.
  • the capability information indicates the capability of receiving the multicast service corresponding to the band and/or the capability of receiving the multicast service corresponding to the CC is introduced above.
  • the capability information may also indicate multicast modulation information corresponding to at least one band, where the multicast modulation The information is the highest modulation order supported when receiving multicast services.
  • the multicast modulation information corresponding to the band may be indicated in the communication parameter corresponding to the band in the Band List.
  • the highest modulation order supported by the multicast service on the band is the modulation order supported by all terminal devices, or the modulation order must be selected by the terminal device, then the capability information may not be reported.
  • the highest modulation order supported when receiving multicast services on the band is the modulation order supported by all terminal devices, or the modulation order must be selected by the terminal device.
  • the capability information may include band-level multicast modulation information, for example, the communication parameters corresponding to the band in the Band List include the multicast modulation information corresponding to the band.
  • the capability information may also include CC-level multicast modulation information, for example, the CC-level communication parameters indicated by Feature Sets Combination include CC-level multicast modulation information.
  • the "multicast modulation order" shown in FIG. 9 indicates the highest modulation order supported when receiving multicast services.
  • the multicast modulation information at the CC level does not actually constrain the maximum order used on the CC, and the access network device can determine that the terminal device receives the multicast on the CC according to the multicast modulation information at the CC level.
  • the peak rate of business Under this peak rate constraint, the terminal device can use a modulation order higher than this modulation order, such as modulation order 1.
  • the prerequisite for using the modulation order 1 is that the corresponding band supports the modulation order 1.
  • the terminal device supports a modulation order of 64 quadrature amplitude modulation (quadrature amplitude modulation, QAM) on CC1.
  • the modulation order supported by the band corresponding to CC1 is 256QAM. Then the terminal device can use 256QAM on CC1, as long as the peak block length of scheduling 256QAM is less than or equal to the peak block length of 64QAM.
  • the current capability information is designed based on the combined structure of carrier aggregation (dual connectivity, CA).
  • the existing CA has the following requirements:
  • CA When CA is deployed frame timing and SFN are aligned across cells that can be aggregated (synchronous CA), or an offset in multiples of slots between the PCell/PSCell and an SCell is configured to the UE (asynchronous CA).
  • the terminal equipment can use the CA technology only when the cells are frame-aligned (asynchronous CA allows the deviation between cells not to exceed half a frame at most).
  • a terminal device receives unicast services and multicast services at the same time, the unicast services and multicast services may be received from different access network devices, and even the two access network devices may not be the same PLMN/ operator's. Therefore, for the access network devices, it is impossible to judge whether the frames of the access network devices are aligned, so the scheduling of the multicast service and/or unicast service by the access network device may exceed the capability of the terminal device.
  • the capability information sent by the terminal device may also indicate whether synchronization is supported under different capability combinations (also unicast service and multicast service at the same time under the condition of frame alignment) or asynchronous (that is, frame misalignment).
  • the above method introduces new indication information to indicate whether to support simultaneous reception of unicast services and multicast services under different capability combinations (that is, frame alignment) or asynchronous (that is, frame misalignment), so that the access network
  • the device can provide unicast services more reasonably.
  • the ability of the terminal device to indicate whether to support asynchronous CA or asynchronous DC can be reused. If the terminal device supports asynchronous CA, it can be considered that the terminal device supports receiving unicast services and multicast services at the same time.
  • the terminal device when reporting the unicast capability, may report the combination of capabilities currently available for the multicast service.
  • the ability to fall back can also be reported.
  • the fallback capability is the weakening of the existing unicast capability.
  • band A supports 100M
  • band B supports 50M
  • the fallback capability can be weakened capabilities such as band A supporting 80M and band B supporting 50M.
  • the specific capability information may be shown in Table 6 below.
  • the terminal device may select an available capability combination and send it to the network device. For example, the terminal device is currently receiving unicast services on band A. After the terminal device starts to receive multicast services (there is no limit to the band for receiving multicast services), the terminal device can send and receive multicast services to the network device and continue The combination of competencies used, such as the first row and/or the second row and/or the third row. Specifically, when the terminal device reports the available capability combinations, it may go through the MII process or through the user assistance information (user assistance information, UAI) process.
  • UAI user assistance information
  • the capability information reported by the terminal device carries the identifier (or index) of each capability combination.
  • the feature set combination corresponding to featureSetCombinationID 1 in Table 3b includes 4 rows (that is, 4 capability combinations), and the identifiers are 1 and 2 respectively. , 3, 4.
  • the terminal device When the terminal device starts to receive the multicast service, it can select and report the identification that supports the ability combination of receiving the current unicast service and the multicast service at the same time. Specifically, one identification can be reported, and all identifications that meet the requirements can also be reported.
  • the terminal device when the terminal device reports receiving the multicast service, it may also select the identifier of the combination of capabilities with the largest unicast service. Since the capability information reported by the terminal equipment may not have a combination of capabilities that can support unicast services and multicast services at the same time, in this method, the maximum capability of the supported unicast services is reported so that the access network equipment can adjust the unicast service for the terminal equipment. resources used by the business.
  • the terminal device can report the band combination, featureSetCombinationID and featureSet ID of the capability combination, that is, report the capability information to the access network device again by indexing.
  • the usable capability combination reported by the terminal device may be a capability combination that supports simultaneous reception of unicast services and multicast services, or may be the maximum capability supported by unicast services under the condition that multicast services are satisfied.
  • the access network device may provide the unicast service within the capability combination indicated by the terminal device after receiving the indication information reported by the terminal device.
  • the access network device by reporting the ability to receive multicast services at the band level or the ability to receive multicast services at the CC level in the capability information, accurate reporting of the multicast capability can be achieved, so that the access network device can
  • the capability information provides a multicast service, or more precisely, a terminal device provides a unicast service.
  • the communication efficiency of the multicast service and the unicast service can be improved.
  • MII can interact between access network devices, and the access network devices can communicate through inter-node RRC Messages (Inter-node RRC message) are used to interact with each other, and are used to send services of interest to the terminal equipment to adjacent access network equipment.
  • the MII can contain the TMGI that the terminal device is interested in or is receiving.
  • the TMGI includes PLMN information. The specific form of the TMGI is as follows:
  • the PLMN information can have two forms, one is the index value of the PLMN (plmn-Index), and the other is the specific value of the PLMN (explicitValue).
  • the index value reported by the terminal device is the PLMN identity information list (plmn-IdentityInfoList) in SIB1 or the PLMN index value in the non-public network (non-public network, NPN) identity information list (npn-IdentityInfoList) Or an independent non-public network (stand-alone non-public network, SNPN) index value.
  • the plmn-IdentityInfoList contains multiple PLMN-IdentityInfo, including multiple PLMN index values and cell IDs.
  • the PLMN index value of the i-th PLMN in the n-th cell can be calculated by the formula b1+b2+...+b(n-1)+i, where b(n-1) is the n-1th The number of PLMNs included in the cell. In this way, the PLMN index value corresponding to each PLMN can be obtained.
  • the PLMN information in the TMGI received by the terminal device may be a PLMN index value or a PLMN value.
  • the exchange of MII messages between access network devices usually directly forwards the terminal device to other access network devices, and other access network devices cannot determine the PLMN
  • the PLMN corresponding to the index value makes it impossible to interpret the PLMN index value in the TMGI, and other access network devices cannot correctly identify the TMGI.
  • the source access network device can send the corresponding relationship to other access network devices, and the corresponding relationship is the relationship between one or more PLMN index values and one or more PLMN values one-to-one relationship. Therefore, after the source access network device receives the indication information from the terminal device, the indication information indicates that the terminal device is receiving or expects to receive the information of the multicast service (such as the aforementioned MII). If the indication information includes at least one PLMN index value. The source access network device may send the indication information to other access network devices. Other access network devices can determine the corresponding PLMN according to the corresponding relationship and the PLMN index value included in the indication information.
  • Implementation mode 1 The source access network device sends the PLMN identification information in SIB1 to other access network devices, and the PLMN identification information indicates the corresponding relationship.
  • the PLMN identification information may include one or more PLMN values. The order of the one or more PLMN values indicates the correspondence.
  • the source access network device sends the PLMN-IdentityInfo to other access network devices.
  • this method only needs to exchange required information, and other unnecessary information in SIB1 does not need to be exchanged too much, and the signaling overhead is small.
  • Implementation method 2 In the current Xn protocol, the Xn interface establishment (Xn Setup) process and the NG-RAN node configuration update (NG-RAN node Configuration Update) process will forward the relevant information of the cell, including the PLMN list of the broadcast information of each cell , which contains the PLMN list broadcast in the SIB corresponding to each cell (CGI), that is, the plmn-IdentityList in the PLMN-IdentityInfo.
  • CGI the PLMN list of the broadcast information of each cell
  • the source access network device may indicate the corresponding relationship between the PLMN index value and the specific value of the PLMN in the relevant information of the cell.
  • the PLMN index value corresponding to the specific value of the PLMN may be carried in the relevant information of the cell.
  • the first access network device sends an Xn interface establishment message or an NG-RAN node configuration update message to the second access network device, and the Xn interface establishment message or the NG-RAN node configuration update message includes at least one Cell information, where the information of the first cell in the at least one cell indicates at least one PLMN of the first cell and a PLMN index value corresponding to each PLMN.
  • the source access network device may make the order of the PLMNs in the cell-related information consistent with the order of the PLMNs of the cell in SIB1, which may be specified in the protocol or implemented by the access network device.
  • the offset of the PLMN index value is forwarded to other access network devices, specifically, the offset may be the total number of PLMNs of each cell before the cell, for example, the information about the nth cell may include the first cell The total number of PLMNs up to the n-1th cell b1+b2+...+b(n-1).
  • the first access network device sends an Xn interface establishment message or an NG-RAN node configuration update message to the second access network device, and the Xn interface establishment message or the NG-RAN node configuration update message includes at least one The information of the cell, the information of the nth cell in the at least one cell indicates at least one PLMN and offset of the nth cell, and the offset is the first cell to the nth cell in the at least one cell - the total number of PLMNs in one cell, the n is an integer greater than 0.
  • the corresponding relationship may be sent first and then the indication information may be sent, or the indication information may be sent first and then the corresponding relationship may be sent, or the corresponding relationship and the indication may be sent at the same time.
  • Information for example, sending the correspondence and indication information through a message (or signaling).
  • the terminal device receives service information from the access network device, where the service information includes the first TMGI, where the first TMGI includes the first PLMN index value. After determining the PLMN value corresponding to the first PLMN index value, the terminal device sends MII to the access network device, where the MII includes a second TMGI, and the second TMGI includes the PLMN value corresponding to the first PLMN index value.
  • the access network device may be an access network device that provides multicast services for terminal devices.
  • the second TMGI is the TMGI carried by the application layer message (such as a service announcement (service announcement) message) received by the terminal device.
  • the application layer message such as a service announcement (service announcement) message
  • the second TMG is generated by the terminal device according to the first TMGI and the PLMN value corresponding to the first PLMN index value.
  • the terminal device may replace the first PLMN index value in the first TMGI with the PLMN value corresponding to the first PLMN index value, and then generate the second TMGI.
  • the access network device may forward it to other access network devices.
  • the source access network device receives first indication information from the terminal device, the first indication information indicates that the terminal device is receiving or expects to receive multicast service information, and the The first indication information includes at least one PLMN index value; the source access network device sends second indication information to other access network devices, and the PLMN information in the second indication information is the PLMN value corresponding to the at least one PLMN index value .
  • the second indication information is obtained by replacing the at least one PLMN index value in the first indication information with a PLMN value corresponding to the at least one PLMN index value.
  • the first indication information indicates that the terminal device is receiving or expects to receive at least one of the following information of the multicast service: frequency information, TMGI, SCS, or modulation order.
  • the source access network device receives the MII reported by the terminal device, if the MII includes the PLMN index value, it sends the specific value of the PLMN corresponding to the PLMN index value to other access network devices, for example, in The specific value of the PLMN is re-encoded and sent to other access network devices.
  • an embodiment of the present application further provides a communication method, which is used to reduce signaling overhead and improve continuity of multicast services on the premise of ensuring communication security. As shown in Figure 10, the method specifically includes:
  • the terminal device determines first information and second information.
  • the first information indicates that the terminal device is interested in the multicast service
  • the second information indicates the multicast service that the terminal device is interested in.
  • S1001 may be an optional step.
  • the terminal device sends first information.
  • the access network device receives the first information.
  • the first information may include at least one of the following: a list of frequencies of interest, a priority of a multicast service, or a broadcast CFR. That is, the terminal device may implicitly indicate that the terminal device is interested in the multicast service by at least one of the following items: a list of interested frequencies, a priority of the multicast service, or a broadcast CFR.
  • the terminal device may also indicate the first information in other ways, for example, indicating the first information through 1-bit display, and so on.
  • the frequency list of interest, the priority of the multicast service, or the broadcast CFR may also be sent after security activation, for example, together with the second information.
  • the terminal device may send the first information in other ways, for example, displaying a bit to indicate that the terminal device is interested in the multicast service.
  • the specific first information may be sent through an RRC setup complete (RRCSetupComplete) message or an RRC setup request (RRCSetupRequest) message or other messages.
  • RRC setup complete RRCSetupComplete
  • RRCSetupRequest RRC setup request
  • the access network device configures frequency domain resources for the terminal device based on the first information, for example, configures an initial BWP for the terminal device, where the bandwidth of the initial BWP is equal to the bandwidth of the CFR.
  • the terminal device sends the second information.
  • the access network device receives the second information.
  • the second information indicates the multicast service that the terminal device is interested in.
  • the second information may include a multicast service identifier or a multicast service identifier or an Internet protocol (internet protocol, IP) group address.
  • the multicast service identifier or the multicast service identifier may be TMGI.
  • the second information may be sent through terminal equipment assistance information (UEAssistanceInformation), security mode completion (SecurityModeComplete) message, or other messages.
  • terminal equipment assistance information (UEAssistanceInformation)
  • security mode completion (SecurityModeComplete) message
  • other messages such as
  • the terminal device can receive the interested multicast service on the configured frequency domain resource, for example, it can receive the interested multicast service on the configured initial BWP.
  • the first information is sent before the security activation
  • the second information is sent after the security activation.
  • S1003 may be performed before security activation or after security activation, which is not specifically limited here.
  • the security activation process may include: the access network device sends a security mode command to the terminal device, where the security mode command carries a key. Afterwards, the terminal device sends the completion of the security mode to the access network device. Based on this example, in a specific implementation manner, the first information may be sent before receiving the security mode command from the access network device or before the completion of sending the security mode, and the second information may be sent after the completion of sending the security mode.
  • the terminal device may adopt a method of sending the first information before the security activation and sending the second information after the security activation when at least one of the following conditions is met:
  • the cell/access network device accessed by the terminal device is providing multicast services
  • the cell/access network equipment accessed by the terminal equipment will provide multicast services
  • the cell/access network equipment accessed by the terminal equipment supports the provision of multicast services
  • the terminal device is receiving or expects to receive multicast services in the currently accessed cell/access network device
  • the multicast service that the terminal device is receiving or expects to receive is provided/will/supported by the currently accessed cell/access network device;
  • the cell currently accessed by the terminal device broadcasts the SIB for providing multicast service information
  • the cell currently accessed by the terminal device broadcasts a first SIB, and the first SIB carries multicast control configuration information (MCCH);
  • MCCH multicast control configuration information
  • the CFR bandwidth of the multicast service provided by the cell currently accessed by the terminal device is different from the initial BWP bandwidth configured in the system message;
  • the CFR bandwidth of the multicast service provided by the cell currently accessed by the terminal device is greater than the initial BWP bandwidth configured in the system message; or,
  • the terminal device receives third information from the access network device, where the third information instructs the terminal device to adopt a mode of sending the first information before the security activation and sending the second information after the security activation.
  • the third information is carried in a broadcast message.
  • the access network device can configure resources for the multicast service, such as CFR, for the terminal device, so that there is no need to After configuring resources for unicast services, reconfigure according to multicast services. For example, it is not necessary to configure initial BWP bandwidth to CFR bandwidth according to multicast services after configuring initial BWP. In this way, the signaling overhead can be reduced, which helps to ensure the continuity of the multicast service.
  • sending the related information of the multicast service that the terminal device is interested in after the security activation can avoid the transmission of specific MBS information in an unsafe environment, thereby improving communication security.
  • the method shown in FIG. 7 and the method shown in FIG. 10 may be implemented as an independent solution, or may be combined as a solution.
  • the terminal device when the terminal device sends the MII to the access network device, it can be sent through the method described in FIG.
  • the priority of the service, or information such as the broadcast CFR is implicitly indicated, or may be explicitly indicated by 1 bit, and the second information is sent after security activation.
  • the order and other information may be sent before the security activation, for example, together with the first information, or may be sent after the security activation, for example, together with the second information.
  • information such as the frequency list of interest, the priority of the multicast service, the broadcast CFR, or the modulation order of the multicast service being received or expected to be received can also be part of the information sent before the security activation, and the other part of the information can be sent before the security activation. after activation.
  • this embodiment of the present application provides a communication device.
  • the structure of the communication device may be as shown in FIG. 11 , including a communication module 1101 and a processing module 1102 .
  • the communication device can be specifically used to implement the method executed by the terminal device in the embodiment of FIG. Executes part of the associated method's functionality.
  • the processing module 1102 is used to determine capability information, and the capability information indicates the capability of receiving multicast services corresponding to the frequency band, and/or the capability of receiving multicast services corresponding to the component carrier CC; network equipment to send capability information.
  • the communication module 1101 is further configured to: send indication information to the access network device, where the indication information indicates that the terminal equipment is receiving the modulation order of the multicast service.
  • the communication module 1101 is further configured to: before the processing module 1102 determines the capability information, receive capability report indication information from the access network device, where the capability report indication information instructs the terminal device to report the ability to receive multicast services.
  • the capability information includes a first frequency band combination list and an identifier of a first feature set combination; wherein, the first frequency band combination list includes first frequency band information, and the first frequency band information includes identifiers of N frequency bands that support receiving multicast services , N is an integer greater than 0; the first feature set combination includes at least one first parameter set corresponding to the first frequency band combination list, any first parameter set indicates the ability to receive multicast services corresponding to N frequency bands, and/or Or, the capability of receiving multicast services corresponding to the CCs on each of the N frequency bands.
  • the first frequency band combination list also includes second frequency band information, and the second frequency band information includes identifiers of M frequency bands supporting unicast services, where M is an integer greater than 0; any first parameter set also indicates M frequency bands Corresponding capabilities for receiving unicast services, or, any first parameter set also indicates capabilities for receiving communication services corresponding to the M frequency bands, and the communication services include unicast services and multicast services.
  • the capability information includes a second frequency band combination list and an identifier of a second feature set combination; wherein, the second frequency band combination list includes identifiers of N frequency bands that support receiving multicast services, and N is an integer greater than 0; the second The feature set combination includes Q1 group parameters corresponding to the second frequency band combination list, where each group of parameters includes Q2 second parameter sets, and any second parameter set indicates the ability to receive multicast services corresponding to N frequency bands, and/or Or, the capability of receiving the multicast service corresponding to the CC on each frequency band in the N frequency bands, Q1 is an integer greater than 0, and Q2 is an integer greater than 0.
  • the capability information also includes a third frequency band combination list, where the third frequency band combination list includes identifiers of M frequency bands that support receiving unicast services, and M is an integer greater than 0; the second feature set combination also includes the third The Q2 third parameter sets corresponding to the frequency band combination list, any third parameter set indicates the ability to receive unicast services corresponding to the M frequency bands; wherein, the i-th second parameter set in the Q2 second parameter sets is the same as Q1 Corresponds to the i-th first parameter set in any group of parameters in the group of parameters, where i is an integer greater than 0 and not greater than Q2.
  • the capability information includes a second frequency band combination list and identifications of Q1 third feature set combinations; wherein, the second frequency band combination list includes identifications of N frequency bands that support receiving multicast services, and N is an integer greater than 0; Any third feature set combination includes Q2 fourth parameter sets, any fourth parameter set indicates the capability of receiving multicast services corresponding to the N frequency bands, and/or, the corresponding CC on each frequency band in the N frequency bands Capability of receiving multicast services, Q1 is an integer greater than 0, and Q2 is an integer greater than 0.
  • the capability information also includes a third frequency band combination list and an identifier of a fourth feature set combination, where the third frequency band combination includes identifiers of M frequency bands that support receiving unicast services, and M is an integer greater than 0; the fourth The feature set combination includes Q2 fifth parameter sets, and any fifth parameter set indicates the capabilities of receiving unicast services corresponding to the M frequency bands respectively.
  • the capability information includes a fourth frequency band combination list and an identification of a fifth feature set combination; wherein, the fourth frequency band combination list includes identifications of X frequency bands supported by the terminal device, and X is an integer greater than 0; the fifth feature set The combination includes at least one sixth parameter set, and any sixth parameter set indicates communication parameters corresponding to X frequency bands, wherein the X frequency bands include N frequency bands that support receiving multicast services, and any frequency band in the N frequency bands corresponds to The communication parameter indicates the capability of receiving multicast services corresponding to the frequency band, and/or the communication capability corresponding to the CC on the frequency band, wherein, if the CC supports receiving multicast services, the communication capability corresponding to the CC is the capability of receiving multicast services corresponding to the CC , N is an integer greater than 0 and not greater than X.
  • any sixth parameter set indicates communication parameters corresponding to the X frequency bands, including: any sixth parameter set includes indexes of communication parameters corresponding to the X frequency bands respectively, and communication parameters of any frequency band in the X frequency bands The index of the frequency band satisfies: if the frequency band supports multicast service reception, the communication parameter index corresponding to the frequency band belongs to the first index set; if the frequency band does not support multicast service reception, the communication parameter index corresponding to the frequency band belongs to the second index set.
  • the communication parameter corresponding to any frequency band in the N frequency bands indicates the communication capability corresponding to the CC on the frequency band, including: the communication parameter corresponding to any frequency band in the N frequency bands includes an index of the communication capability corresponding to the CC on the frequency band, any The index of the communication capability corresponding to a CC satisfies: if the CC supports receiving multicast services, the index of the communication capability corresponding to the CC belongs to the third index set; if the CC does not support receiving multicast services, the index of the communication capability corresponding to the CC belongs to the fourth set index collection.
  • the capability of receiving multicast services corresponding to the frequency band includes at least one of the following: the frequency band supports receiving multicast services, or communication parameters for receiving multicast services on the frequency band.
  • the capability of receiving multicast services corresponding to a CC includes: the CC supports receiving multicast services, and/or, the communication information of receiving multicast services on the CC; where the communication information is the information of receiving multicast services on the CC
  • the communication parameter, or the communication information is the capability value of the CC, and the capability value is determined according to the communication parameter for receiving the multicast service on the CC.
  • the communication parameters for receiving multicast services include the highest modulation order supported when receiving multicast services.
  • the communication device can be specifically used to implement the method performed by the access network device in the embodiment of FIG. 7 , and the device can be the access network device itself, or a chip or a chip in the access network device Part of a set or chip for performing the function of the associated method.
  • the communication module 1101 is configured to receive capability information from the terminal device, the capability information indicates the capability of receiving multicast services corresponding to the frequency band, and/or the capability of receiving multicast services corresponding to the component carrier CC; the processing module 1102 uses It is used to determine the capability of the terminal device according to the capability information.
  • the communication module 1101 is further configured to: receive indication information from the terminal device, where the indication information includes the modulation order that the terminal device is receiving the multicast service.
  • the communication module 1101 is further configured to: before receiving the capability information from the terminal device, send capability report instruction information to the terminal device, where the capability report instruction information instructs the terminal device to report the capability of receiving multicast services.
  • the capability information includes a first frequency band combination list and an identifier of a first feature set combination; wherein, the first frequency band combination list includes first frequency band information, and the first frequency band information includes identifiers of N frequency bands that support receiving multicast services , N is an integer greater than 0; the first feature set combination includes at least one first parameter set corresponding to the first frequency band combination list, any first parameter set indicates the ability to receive multicast services corresponding to N frequency bands, and/or Or, the capability of receiving multicast services corresponding to the CCs on each of the N frequency bands.
  • the first frequency band combination list also includes second frequency band information, and the second frequency band information includes identifiers of M frequency bands supporting unicast services, where M is an integer greater than 0; any first parameter set also indicates M frequency bands Corresponding capabilities for receiving unicast services, or, any first parameter set also indicates capabilities for receiving communication services corresponding to the M frequency bands, and the communication services include unicast services and multicast services.
  • the capability information includes a second frequency band combination list and an identifier of a second feature set combination; wherein, the second frequency band combination list includes identifiers of N frequency bands that support receiving multicast services, and N is an integer greater than 0; the second The feature set combination includes Q1 group parameters corresponding to the second frequency band combination list, where each group of parameters includes Q2 second parameter sets, and any second parameter set indicates the ability to receive multicast services corresponding to N frequency bands, and/or Or, the capability of receiving the multicast service corresponding to the CC on each frequency band in the N frequency bands, Q1 is an integer greater than 0, and Q2 is an integer greater than 0.
  • the capability information also includes a third frequency band combination list, where the third frequency band combination list includes identifiers of M frequency bands that support receiving unicast services, and M is an integer greater than 0; the second feature set combination also includes the third The Q2 third parameter sets corresponding to the frequency band combination list, any third parameter set indicates the ability to receive unicast services corresponding to the M frequency bands; wherein, the i-th second parameter set in the Q2 second parameter sets is the same as Q1 Corresponds to the i-th first parameter set in any group of parameters in the group of parameters, where i is an integer greater than 0 and not greater than Q2.
  • the capability information includes a second frequency band combination list and identifications of Q1 third feature set combinations; wherein, the second frequency band combination list includes identifications of N frequency bands that support receiving multicast services, and N is an integer greater than 0; Any third feature set combination includes Q2 fourth parameter sets, any fourth parameter set indicates the capability of receiving multicast services corresponding to the N frequency bands, and/or, the corresponding CC on each frequency band in the N frequency bands Capability of receiving multicast services, Q1 is an integer greater than 0, and Q2 is an integer greater than 0.
  • the capability information also includes a third frequency band combination list and an identifier of a fourth feature set combination, where the third frequency band combination includes identifiers of M frequency bands that support receiving unicast services, and M is an integer greater than 0; the fourth The feature set combination includes Q2 fifth parameter sets, and any fifth parameter set indicates the capabilities of receiving unicast services corresponding to the M frequency bands respectively.
  • the capability information includes a fourth frequency band combination list and an identification of a fifth feature set combination; wherein, the fourth frequency band combination list includes identifications of X frequency bands supported by the terminal device, and X is an integer greater than 0; the fifth feature set The combination includes at least one sixth parameter set, and any sixth parameter set indicates communication parameters corresponding to X frequency bands, wherein the X frequency bands include N frequency bands that support receiving multicast services, and any frequency band in the N frequency bands corresponds to The communication parameter indicates the capability of receiving multicast services corresponding to the frequency band, and/or the communication capability corresponding to the CC on the frequency band, wherein, if the CC supports receiving multicast services, the communication capability corresponding to the CC is the capability of receiving multicast services corresponding to the CC , N is an integer greater than 0 and not greater than X.
  • any sixth parameter set indicates communication parameters corresponding to the X frequency bands, including: any sixth parameter set includes indexes of communication parameters corresponding to the X frequency bands respectively, and communication parameters of any frequency band in the X frequency bands The index of the frequency band satisfies: if the frequency band supports multicast service reception, the communication parameter index corresponding to the frequency band belongs to the first index set; if the frequency band does not support multicast service reception, the communication parameter index corresponding to the frequency band belongs to the second index set.
  • the communication parameter corresponding to any frequency band in the N frequency bands indicates the communication capability corresponding to the CC on the frequency band, including: the communication parameter corresponding to any frequency band in the N frequency bands includes an index of the communication capability corresponding to the CC on the frequency band, any The index of the communication capability corresponding to a CC satisfies: if the CC supports receiving multicast services, the index of the communication capability corresponding to the CC belongs to the third index set; if the CC does not support receiving multicast services, the index of the communication capability corresponding to the CC belongs to the fourth set index collection.
  • the capability of receiving multicast services corresponding to the frequency band includes at least one of the following: the frequency band supports receiving multicast services, or communication parameters for receiving multicast services on the frequency band.
  • the capability of receiving multicast services corresponding to a CC includes: the CC supports receiving multicast services, and/or, the communication information of receiving multicast services on the CC; where the communication information is the information of receiving multicast services on the CC
  • the communication parameter, or the communication information is the capability value of the CC, and the capability value is determined according to the communication parameter for receiving the multicast service on the CC.
  • the communication parameters for receiving multicast services include the highest modulation order supported when receiving multicast services.
  • each functional module in each embodiment of the present application can be integrated into a processing In the controller, it can also be physically present separately, or two or more modules can be integrated into one module.
  • the above-mentioned integrated modules can be implemented in the form of hardware or in the form of software function modules. It can be understood that, for the function or implementation of each module in the embodiment of the present application, further reference may be made to the relevant description of the method embodiment.
  • the communication device may be as shown in Figure 12, and the device may be a communication device or a chip in a communication device, where the communication device may be the terminal device in the above embodiment or it may be the terminal device in the above embodiment Internet equipment.
  • the device includes a processor 1201 and a communication interface 1202 , and may also include a memory 1203 .
  • the processing module 1102 may be the processor 1201 .
  • the communication module 1101 may be a communication interface 1202 .
  • the processor 1201 may be a CPU, or a digital processing unit or the like.
  • the communication interface 1202 may be a transceiver, or an interface circuit such as a transceiver circuit, or a transceiver chip or the like.
  • the device also includes: a memory 1203 for storing programs executed by the processor 1201 .
  • the memory 1203 can be a non-volatile memory, such as a hard disk (hard disk drive, HDD) or a solid-state drive (solid-state drive, SSD), etc., and can also be a volatile memory (volatile memory), such as a random access memory (random -access memory, RAM).
  • the memory 1203 is any other medium that can be used to carry or store desired program codes in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto.
  • the processor 1201 is configured to execute the program codes stored in the memory 1203, and is specifically configured to execute the actions of the above-mentioned processing module 1102, which will not be repeated in this application.
  • the communication interface 1202 is specifically used to execute the actions of the above-mentioned communication module 1101, which will not be repeated in this application.
  • the embodiment of the present application does not limit the specific connection medium among the communication interface 1202, the processor 1201, and the memory 1203.
  • the memory 1203, the processor 1201, and the communication interface 1202 are connected through the bus 1204.
  • the bus is represented by a thick line in FIG. 12, and the connection mode between other components is only for schematic illustration. , is not limited.
  • the bus can be divided into address bus, data bus, control bus and so on. For ease of representation, only one thick line is used in FIG. 12 , but it does not mean that there is only one bus or one type of bus.
  • An embodiment of the present invention also provides a computer-readable storage medium for storing computer software instructions to be executed for executing the above-mentioned processor, which includes a program for executing the above-mentioned processor.
  • the embodiment of the present application further provides a communication system, including a communication device for realizing the function of the terminal device in the embodiment of FIG. 7 and a communication device for realizing the function of the network device in the embodiment of FIG. 7 .
  • the embodiment of the present application further provides a communication system, including a communication device for realizing the function of the terminal device in the embodiment of FIG. 10 and a communication device for realizing the function of the network device in the embodiment of FIG. 10 .
  • the embodiments of the present application may be provided as methods, systems, or computer program products. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.
  • computer-usable storage media including but not limited to disk storage, CD-ROM, optical storage, etc.
  • These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to operate in a specific manner, such that the instructions stored in the computer-readable memory produce an article of manufacture comprising instruction means, the instructions
  • the device realizes the function specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

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Abstract

本申请提供一种通信方法及装置，用于解决终端设备的多播能力上报精度较低的问题。该方法包括：确定能力信息，向接入网设备进行发送，能力信息指示频带对应的接收多播业务的能力，和/或，分量载波对应的接收多播业务的能力。通过能力信息指示频带级别或分量载波级别的多播业务的能力，可以提升多播能力上报的精度，使得接入网设备可以根据精细化的能力信息提供多播业务和/或单播业务。

Description

一种通信方法及装置
相关申请的交叉引用
本申请要求在2021年10月15日提交中国专利局、申请号为202111202345.1、申请名称为“一种通信方法及装置”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。以及要求在2022年08月09日提交中国专利局、申请号为202210952975.9、申请名称为“一种通信方法及装置”的中国专利申请中除上述申请号为202111202345.1的全部内容以外的其他部分内容的优先权，该部分内容通过引用结合在本申请中。
技术领域
本申请涉及通信技术领域，尤其涉及一种通信方法及装置。
背景技术
多媒体广播多播业务(multimedia broadcast multicast service，MBMS)或者组播/多播广播业务(multicast broadcast service，MBS)主要适用于是面向多个用户设备(user equipment，UE)的业务，例如现场直播、定时播放节目等。
在长期演进(long term evolution，LTE)中，接入网设备可以通过能力查询过程来获取UE能力信息，UE能力信息包括MBMS能力信息。
当前LTE设计的MBMS能力信息为UE级别，只支持上报用于MBS的最大带宽。而这种方式不能对UE的多播能力进行精准上报。因此，如何实现UE的多播能力的精准上报仍需进一步研究。
发明内容
本申请提供一种通信方法及装置，用于解决终端设备的多播能力上报精度较低的问题。
第一方面，本申请提供一种通信方法，该方法可由第一通信装置执行，第一通信装置可以是通信设备或能够支持通信设备实现该方法所需的功能的通信装置，例如芯片。示例性地，该第一通信装置为终端设备，或者为设置在终端设备中的用于实现终端设备的功能的芯片，或者为用于实现终端设备的功能的其他部件。在下文的介绍过程中，以第一通信装置是终端设备为例进行说明。
该方法包括：终端设备确定能力信息，向接入网设备进行发送，该能力信息指示频带对应的接收多播业务的能力，和/或，分量载波(component carrier，CC)对应的接收多播业务的能力。
本申请实施例终端设备可通过能力信息指示频带(或称band)级别和/或CC级别的多播能力，从而提升多播能力上报的精度，使得接入网设备可以获取精细化的能力信息。一种可能的实现，接入网设备可以根据精细化的能力信息提供多播业务和/或单播业务，例如，可以根据精细化的能力信息配置或选择多播业务和/或单播业务的通信参数。
一种可能的设计中，能力信息指示频带对应的接收多播业务的能力，和/或，分量载波CC对应的接收多播业务的能力，包括：能力信息包括频带组合信息，该频带组合信息指 示频带对应的接收多播业务的能力，和/或，分量载波CC对应的接收多播业务的能力。通过该方式，使得终端设备可以上报在频带组合下band级别或CC级别的多播能力，从而可以提升多播能力上报的精度。
一种可能的设计中，能力信息指示频带对应的接收多播业务的能力，和/或，分量载波CC对应的接收多播业务的能力，包括：能力信息包括第一频带组合列表以及第一特性集组合的标识；其中，第一频带组合列表包括第一频带信息，第一频带信息包括支持接收多播业务的N个频带的标识，N为大于0的整数；第一特性集组合包括第一频带组合列表对应的至少一个第一参数集合，任一第一参数集合指示N个频带分别对应的接收多播业务的能力，和/或，N个频带中每个频带上CC对应的接收多播业务的能力。
上述方式中，通过在频带组合列表中列举支持接收多播业务的N个频带的标识，并在特性集组合中指示频带组合下这N个频带分别对应的接收多播业务的能力，从而可以提升多播能力的精度，有助于接入网设备为终端设备调度多播业务和/或单播业务。
一种可能的设计中，第一频带组合列表还包括第二频带信息，第二频带信息包括支持单播业务的M个频带的标识，M为大于0的整数；任一第一参数集合还指示M个频带分别对应的接收单播业务的能力，或者，任一第一参数集合还指示M个频带分别对应的接收通信业务的能力，通信业务包括单播业务和多播业务。通过上述设计，可以上报频带组合下M个频带上接收单播业务的能力，有助于接入网设备获取精细化的终端设备能力，从而有助于接入网设备更好地为终端设备提供多播业务和/或单播业务。
一种可能的设计中，能力信息指示频带对应的接收多播业务的能力，和/或，分量载波CC对应的接收多播业务的能力，包括：能力信息包括第二频带组合列表以及第二特性集组合的标识；其中，第二频带组合列表包括支持接收多播业务的N个频带的标识，N为大于0的整数；第二特性集组合包括第二频带组合列表对应的Q1组参数，其中，每组参数包括Q2个第二参数集合，任一第二参数集合指示N个频带分别对应的接收多播业务的能力，和/或，N个频带中每个频带上CC对应的接收多播业务的能力，Q1为大于0的整数，Q2为大于0的整数。
上述设计，通过扩展频带组合列表(即第二频带组合列表)指示支持接收多播业务的N个频带，以及在特性集组合中指示该N个频带对应的多播能力，从而提升多播能力上报的精度，使得接入网设备可以获取精细化的能力信息。一种可能的实现，有助于接入网设备为终端设备调度多播业务或单播业务。此外，区分该N个频带对应的多播能力与单播能力，使得单播能力和多播能力可以通过组合的方式指示频带组合下终端设备的通信能力，相比于通过穷举的方式依次指示频带组合下支持的所有多播能力和/或单播能力，可以减少不必要的能力信息上报，从而降低信令开销。
一种可能的设计中，能力信息还包括第三频带组合列表，其中，第三频带组合列表包括支持接收单播业务的M个频带的标识，M为大于0的整数；第二特性集组合还包括第三频带组合列表对应的Q2个第三参数集合，任一第三参数集合指示M个频带分别对应的接收单播业务的能力；其中，Q2个第二参数集合中第i个第二参数集合与Q1组参数中任一组参数中的第i个第一参数集合相对应，其中，i为大于0且不大于Q2的整数。
上述设计，通过将该N个频带对应的多播能力与单播能力进行区分，使得单播能力和多播能力可以通过组合的方式指示频带组合下终端设备的通信能力，相比于穷举的方式，可以降低信令开销。并且对于单播能力部分的指示，可以最大程度的重用现有机制，减少 对协议的改动。
一种可能的设计中，能力信息指示频带对应的接收多播业务的能力，和/或，分量载波CC对应的接收多播业务的能力，包括：能力信息包括第二频带组合列表以及Q1个第三特性集组合的标识；其中，第二频带组合列表包括支持接收多播业务的N个频带的标识，N为大于0的整数；任一第三特性集组合包括Q2个第四参数集合，任一第四参数集合指示N个频带分别对应的接收多播业务的能力，和/或，N个频带中每个频带上CC对应的接收多播业务的能力，Q1为大于0的整数，Q2为大于0的整数。
上述设计，通过扩展频带组合列表(即第二频带组合列表)指示支持接收多播业务的N个频带，并且通过扩展接收多播业务的N个频带对应的特性集组合(即Q1个第三特性集组合)，从而提升多播能力上报的精度，使得接入网设备可以获取精细化的能力信息。一种可能的实现，有助于接入网设备为终端设备调度多播业务或单播业务。
此外，区分该N个频带对应的多播能力与单播能力，使得单播能力和多播能力可以通过组合的方式指示频带组合下终端设备的通信能力，相比于通过穷举的方式依次指示频带组合下支持的所有多播能力和/或单播能力，可以减少不必要的能力信息上报，从而降低信令开销。
一种可能的设计中，能力信息还包括第三频带组合列表以及第四特性集组合的标识，其中，第三频带组合包括支持接收单播业务的M个频带的标识，M为大于0的整数；第四特性集组合包括Q2个第五参数集合，任一第五参数集合指示M个频带分别对应的接收单播业务的能力。
上述设计，通过第四特性集组合的标识和第三特性集组合的标识组合的方式，可以降低减少能力上报的信令开销，并且对于单播能力部分的指示，可以最大程度的重用现有机制，对协议的改动较小。
一种可能的设计中，能力信息包括第四频带组合列表以及第五特性集组合的标识；其中，第四频带组合列表包括终端设备支持的X个频带的标识，X为大于0的整数；第五特性集组合包括至少一个第六参数集合，任一第六参数集合指示X个频带分别对应的通信参数，其中，X个频带包括N个支持接收多播业务的频带，N个频带中任一频带对应的通信参数指示频带对应的接收多播业务的能力，和/或，频带上CC对应的通信能力，其中，若CC支持接收多播业务，CC对应的通信能力为CC对应的接收多播业务的能力，N为大于0，且不大于X的整数。
通过上述设计，通过特性集索引对应的通信参数指示接收多播业务的能力，可以降低减少能力上报的信令开销，并且对于单播能力部分的指示，可以最大程度的重用现有机制，对协议的改动较小。
一种可能的设计中，任一第六参数集合指示X个频带分别对应的通信参数，包括：任一第六参数集合包括X个频带分别对应的通信参数的索引，X个频带中任一频带的通信参数的索引满足：若频带支持接收多播业务，频带对应的通信参数的索引属于第一索引集合；若频带不支持接收多播业务，频带对应的通信参数的索引属于第二索引集合。
上述设计，通过划分索引集合，使得接入网设备可以根据频带对应的索引确定频带上是否支持接收多播业务，相比于在频带对应的通信参数中显示携带指示是否支持接收多播业务的标记的方式，可以降低信令开销和协议的复杂度，还可以提升对旧版本协议的兼容性。
一种可能的设计中，N个频带中任一频带对应的通信参数指示频带上CC对应的通信能力，包括：N个频带中任一频带对应的通信参数包括频带上CC对应的通信能力的索引，频带上任一CC对应的通信能力的索引满足：若CC支持接收多播业务，CC对应的通信能力的索引属于第三索引集合；若CC不支持接收多播业务，CC对应的通信能力的索引属于第四索引集合。
上述设计，通过划分索引集合，使得接入网设备可以根据CC对应的索引确定CC上是否支持接收多播业务，相比于在CC对应的通信参数中显示携带指示接收多播业务的标记的方式，可以降低信令开销，以及降低协议的复杂度，还可以提升对支持旧版本协议的设备的兼容性。
一种可能的设计中，频带对应的接收多播业务的能力包括如下至少一项：频带支持接收多播业务、或在频带上接收多播业务的通信参数。
一种可能的设计中，CC对应的接收多播业务的能力包括：CC支持接收多播业务，和/或，在CC上接收多播业务的通信信息；其中，通信信息为在CC上接收多播业务的通信参数，或者，通信信息为CC的能力值，能力值为根据CC上接收多播业务的通信参数确定的。
一种可能的设计中，接收多播业务的通信参数包括接收多播业务时支持的最高调制阶数。
一种可能的设计中，接收多播业务的通信参数还包括：是否支持在同步的情况下同时接收单播业务和多播业务，和/或，是否支持在不同步的情况下同时接收单播业务和多播业务。
一种可能的设计中，方法还包括：向接入网设备发送指示信息，指示信息指示终端设备正在接收或期望接收多播业务的调制阶数。通过该设计，接入网设备根据指示信息可以获知终端设备正在接收或期望接收多播业务的相关信息，从而更好地终端设备调度多播业务和/单播业务。
一种可能的设计中，在向接入网设备发送指示信息之前，所述方法还包括：接收来自所述接入网设备的第四信息，其中，所述第四信息用于指示上报异公用陆地移动网(public land mobile network，PLMN)或者异运营商或者跨基站或者非服务小区或异频接收的多播业务的信息。
一种可能的设计中，在向接入网设备发送指示信息之前，所述方法还包括：
在满足如下任一情况时确定需要上报所述指示信息：
接收的多播业务的TMGI中的PLMN与所述接入网设备的服务小区的系统消息块(system information block，SIB)1中包含的PLMN不一致；
接收多播业务的小区的SIB1中包含的PLMN和所述接入网设备的服务小区的SIB1中包含的PLMN不一致。
一种可能的设计中，所述第四信息包括一个或多个PLMN信息，在向接入网设备发送指示信息之前，所述方法还包括：
在满足如下任一情况时确定需要上报所述指示信息：
接收的多播业务的TMGI中的PLMN与所述一个或多个PLMN均不相同；
接收多播业务的小区的SIB1中包含的PLMN与所述一个或多个PLMN均不相同。
一种可能的设计中，在向接入网设备发送指示信息之前，所述方法还包括：
在满足如下情况中一项或多项时确定需要上报所述指示信息：
接收多播业务的频点不属于该接入网设备的服务小区的SIB 21中包含的频点；
接收多播业务的频点与用户服务描述(user service description，USD)中包括的频点列表中的频点均不相同。
一种可能的设计中，所述第四信息包括一个或多个频点信息，在向接入网设备发送指示信息之前，所述方法还包括：
在满足如下情况时确定需要上报所述指示信息：接收的多播业务的频点与所述一个或多个频点均不相同。
一种可能的设计中，在向接入网设备发送指示信息之前，所述方法还包括：接收来自所述接入网设备的SIB 21。
一种可能的设计中，指示信息还指示终端设备正在接收或期望接收多播业务的如下至少一项信息：频率信息、临时移动组标识(temporary mobile group identity，TMGI)、子载波间隔(subcarrier spacing，SCS)。
一种可能的设计中，在确定能力信息之前，方法还包括：接收来自接入网设备的能力上报指示信息，能力上报指示信息指示终端设备上报接收多播业务的能力。通过该设计，终端设备可以根据接入网设备的指示上报多播能力，可以避免终端设备不必要的能力信息上报，此外，接入网设备可以通过指示信息灵活调控终端设备上报接收多播业务的能力。
第二方面，本申请提供一种通信方法，该方法可由第二通信装置执行，第二通信装置可以是通信设备或能够支持通信设备实现该方法所需的功能的通信装置，例如芯片。示例性地，所述第二通信装置为网络设备(如基站)，或者为设置在网络设备中的用于实现网络设备的功能的芯片，或者为用于实现网络设备的功能的其他部件。在下文的介绍过程中，以第二通信装置是网络设备为例进行说明。
该方法包括：接收来自终端设备的能力信息，能力信息指示频带对应的接收多播业务的能力，和/或，CC对应的接收多播业务的能力；根据能力信息确定终端设备的能力。
一种可能的设计中，能力信息指示频带对应的接收多播业务的能力，和/或，分量载波CC对应的接收多播业务的能力，包括：能力信息包括频带组合信息，该频带组合信息指示频带对应的接收多播业务的能力，和/或，分量载波CC对应的接收多播业务的能力。通过该方式，使得终端设备可以上报在频带组合下band级别或CC级别的多播能力，从而可以提升多播能力上报的精度。
一种可能的设计中，能力信息指示频带对应的接收多播业务的能力，和/或，分量载波CC对应的接收多播业务的能力，包括：能力信息包括第一频带组合列表以及第一特性集组合的标识；其中，第一频带组合列表包括第一频带信息，第一频带信息包括支持接收多播业务的N个频带的标识，N为大于0的整数；第一特性集组合包括第一频带组合列表对应的至少一个第一参数集合，任一第一参数集合指示N个频带分别对应的接收多播业务的能力，和/或，N个频带中每个频带上CC对应的接收多播业务的能力。
一种可能的设计中，第一频带组合列表还包括第二频带信息，第二频带信息包括支持单播业务的M个频带的标识，M为大于0的整数；任一第一参数集合还指示M个频带分别对应的接收单播业务的能力，或者，任一第一参数集合还指示M个频带分别对应的接收通信业务的能力，通信业务包括单播业务和多播业务。通过上述设计，可以上报频带组合下M个频带上接收单播业务的能力，有助于接入网设备准确的了解终端设备的能力，从而 有助于接入网设备为终端设备调度多播业务或单播业务。
一种可能的设计中，能力信息指示频带对应的接收多播业务的能力，和/或，分量载波CC对应的接收多播业务的能力，包括：能力信息包括第二频带组合列表以及第二特性集组合的标识；其中，第二频带组合列表包括支持接收多播业务的N个频带的标识，N为大于0的整数；第二特性集组合包括第二频带组合列表对应的Q1组参数，其中，每组参数包括Q2个第二参数集合，任一第二参数集合指示N个频带分别对应的接收多播业务的能力，和/或，N个频带中每个频带上CC对应的接收多播业务的能力，Q1为大于0的整数，Q2为大于0的整数。
一种可能的设计中，能力信息还包括第三频带组合列表，其中，第三频带组合列表包括支持接收单播业务的M个频带的标识，M为大于0的整数；第二特性集组合还包括第三频带组合列表对应的Q2个第三参数集合，任一第三参数集合指示M个频带分别对应的接收单播业务的能力；其中，Q2个第二参数集合中第i个第二参数集合与Q1组参数中任一组参数中的第i个第一参数集合相对应，其中，i为大于0且不大于Q2的整数。
上述设计，通过将该N个频带对应的多播能力与单播能力进行区分，使得单播能力和多播能力可以通过组合的方式指示频带组合下终端设备的通信能力，相比于穷举的方式，可以降低信令开销。并且对于单播能力部分，可以最大程度的重用现有机制，对协议的改动较小。
一种可能的设计中，能力信息指示频带对应的接收多播业务的能力，和/或，分量载波CC对应的接收多播业务的能力，包括：能力信息包括第二频带组合列表以及Q1个第三特性集组合的标识；其中，第二频带组合列表包括支持接收多播业务的N个频带的标识，N为大于0的整数；任一第三特性集组合包括Q2个第四参数集合，任一第四参数集合指示N个频带分别对应的接收多播业务的能力，和/或，N个频带中每个频带上CC对应的接收多播业务的能力，Q1为大于0的整数，Q2为大于0的整数。
一种可能的设计中，能力信息还包括第三频带组合列表以及第四特性集组合的标识，其中，第三频带组合包括支持接收单播业务的M个频带的标识，M为大于0的整数；第四特性集组合包括Q2个第五参数集合，任一第五参数集合指示M个频带分别对应的接收单播业务的能力。
一种可能的设计中，能力信息包括第四频带组合列表以及第五特性集组合的标识；其中，第四频带组合列表包括终端设备支持的X个频带的标识，X为大于0的整数；第五特性集组合包括至少一个第六参数集合，任一第六参数集合指示X个频带分别对应的通信参数，其中，X个频带包括N个支持接收多播业务的频带，N个频带中任一频带对应的通信参数指示频带对应的接收多播业务的能力，和/或，频带上CC对应的通信能力，其中，若CC支持接收多播业务，CC对应的通信能力为CC对应的接收多播业务的能力，N为大于0，且不大于X的整数。
一种可能的设计中，任一第六参数集合指示X个频带分别对应的通信参数，包括：任一第六参数集合包括X个频带分别对应的通信参数的索引，X个频带中任一频带的通信参数的索引满足：若频带支持接收多播业务，频带对应的通信参数的索引属于第一索引集合；若频带不支持接收多播业务，频带对应的通信参数的索引属于第二索引集合。
上述设计，通过划分索引集合，使得接入网设备可以根据频带对应的索引确定频带上是否支持接收多播业务，相比于在频带对应的通信参数中显示携带指示接收多播业务的标 记的方式，可以降低信令开销，以及降低协议的复杂度，还可以提升对旧版本协议的兼容性。
一种可能的设计中，N个频带中任一频带对应的通信参数指示频带上CC对应的通信能力，包括：N个频带中任一频带对应的通信参数包括频带上CC对应的通信能力的索引，频带上任一CC对应的通信能力的索引满足：若CC支持接收多播业务，CC对应的通信能力的索引属于第三索引集合；若CC不支持接收多播业务，CC对应的通信能力的索引属于第四索引集合。
上述设计，通过划分索引集合，使得接入网设备可以根据CC对应的索引确定CC上是否支持接收多播业务，相比于在CC对应的通信参数中显示携带指示接收多播业务的标记的方式，可以降低信令开销，以及降低协议的复杂度，还可以提升对旧版本协议的兼容性。
一种可能的设计中，频带对应的接收多播业务的能力包括如下至少一项：频带支持接收多播业务、或在频带上接收多播业务的通信参数。
一种可能的设计中，CC对应的接收多播业务的能力包括：CC支持接收多播业务，和/或，在CC上接收多播业务的通信信息；其中，通信信息为在CC上接收多播业务的通信参数，或者，通信信息为CC的能力值，能力值为根据CC上接收多播业务的通信参数确定的。
一种可能的设计中，接收多播业务的通信参数包括接收多播业务时支持的最高调制阶数。
一种可能的设计中，接收多播业务的通信参数还包括：是否支持在同步的情况下同时接收单播业务和多播业务，和/或，是否支持在不同步的情况下同时接收单播业务和多播业务。
一种可能的设计中，方法还包括：接收来自终端设备的指示信息，指示信息包括终端设备正在接收或期望接收多播业务的调制阶数。
一种可能的设计中，在接收来自终端设备的指示信息之前，所述方法还包括：向所述终端设备发送第四信息，其中，所述第四信息用于指示上报异PLMN或者异运营商或者跨基站或者非服务小区或异频接收的多播业务。
一种可能的设计中，在接收来自终端设备的指示信息之前，所述方法还包括：向所述终端设备发送SIB 21。
一种可能的设计中，方法还包括：根据指示信息确定与终端设备进行通信的通信参数。通过上述设计，有助于接入网设备为终端设备调度单播业务。
一种可能的设计中，在接收来自终端设备的能力信息之前，方法还包括：向终端设备发送能力上报指示信息，能力上报指示信息指示终端设备上报接收多播业务的能力。通过上述，终端设备可以在接入网设备的指示下上报多播能力，从而可以避免多播能力不必要的上报。
一种可能的设计中，接入网设备可以根据能力信息向终端设备发送组播业务。
一种可能的设计中，接入网设备在接收到能力信息之后，可以根据能力信息配置组播业务的MBS无线承载(MBS radio bearer，MRB)，如可以通过无线资源控制(radio resource control，RRC)配置消息配置MRB。接入网设备在配置完MRB之后发送组播业务。
一种可能的设计中，接入网设备还可以接收指示信息，该指示信息指示终端设备正在 接收或者期望接收的多播业务的信息，如会话标识(session ID)、使用的子载波间隔(subcarrier spacing，SCS)、带宽(Bandwidth，BW)、频率等信息中一种或多种。接入网设备可以根据终端设备上报的能力信息和指示信息向终端设备发送单播业务。
以上第二方面及其可能的设计所示方法的有益效果可参照第一方面及其可能的设计中的有益效果。
第三方面，本申请提供一种通信方法，该方法的执行主体可以是终端设备，也可以是芯片或电路或用于实现终端设备的功能的其他部件。该方法包括：确定第一信息和第二信息，其中，第一信息指示终端设备对多播业务感兴趣，第二信息指示终端设备感兴趣的多播业务；发送第一信息和第二信息，其中，第一信息在安全激活之前发送，第二信息在安全激活之后发送。
本申请实施例中通过在安全激活之前向接入网设备指示终端设备对多播业务感兴趣，使得接入网设备可以为终端设备配置用于多播业务的资源，例如公共频域资源(common frequency resource，CFR)，从而不需要在配置用于单播业务的资源后根据多播业务再重新配置，例如不需要在配置初始带宽部分(initial BWP)后再根据多播业务将initial BWP的带宽配置为CFR的带宽。通过该方式可以降低信令开销，有助于保证多播业务的连续性。并且，将终端设备感兴趣的多播业务的相关信息在安全激活之后发送，可以避免在不安全的环境中传输MBS的具体信息，从而可以提升通信安全性。
一种可能的设计中，终端设备可以在满足如下条件中至少一项的情况下，采用在安全激活之前发送第一信息，在安全激活之后发送第二信息的方式：
终端设备接入的小区/接入网设备正在提供多播业务；
终端设备接入的小区/接入网设备将要提供多播业务；
终端设备接入的小区/接入网设备支持提供多播业务；
终端设备在当前接入的小区/接入网设备正在接收或者期望接收多播业务；
终端设备正在接收或者期望接收的多播业务为当前接入的小区/接入网设备正在/将要/支持提供的；
终端设备当前接入的小区广播了用于提供多播业务信息的SIB；
终端设备当前接入的小区广播了第一SIB，该第一SIB携带多播控制配置信息(MCCH)；
终端设备当前接入的小区提供的多播业务的CFR的带宽不同于系统消息配置的initial BWP的带宽；
终端设备当前接入的小区提供的多播业务的CFR的带宽大于系统消息配置的initial BWP的带宽；
终端设备接收来自接入网设备的第三信息，该第三信息指示终端设备采用在安全激活之前发送第一信息，在安全激活之后发送第二信息的方式。可选地，第三信息承载于广播消息中。
一种可能的设计中，第二信息包括多播业务标识或者多播服务标识或互联网协议(IP)组地址。上述设计中，通过在安全激活之后指示终端设备感兴趣的多播业务，可以避免在不安全的环境中传输MBS的具体信息，从而可以提升通信安全性。
一种可能的设计中，第一信息为感兴趣的频率列表和/或多播业务的优先级。上述设计中，通过感兴趣的频率列表和/或多播业务的优先级隐式的指示第一信息，可以节省信令开销。
第四方面，本申请提供一种通信方法，该方法的执行主体可以是接入网设备，也可以是芯片或电路。方法包括：接收第一信息和第二信息，其中，第一信息指示终端设备对多播业务感兴趣，第二信息指示终端设备感兴趣的多播业务，且第一信息在安全激活之前接收的，第二信息在安全激活之后接收的；在接收到第一信息之后，基于第一信息为终端设备配置initial BWP，例如，将initial BWP的带宽配置为CFR的带宽。
一种可能的设计中，第二信息包括多播业务标识或者多播服务标识或IP组地址。上述设计中，通过在安全激活之后指示终端设备感兴趣的多播业务，可以避免在不安全的环境中传输MBS的具体信息，从而可以提升通信安全性。
一种可能的设计中，接入网设备向终端设备发送第三信息，该第三信息指示终端设备采用在安全激活之前发送第一信息，在安全激活之后发送第二信息的方式。可选地，第三信息承载于广播消息中。
一种可能的设计中，第一信息为感兴趣的频率列表和/或多播业务的优先级。上述设计中，通过感兴趣的频率列表和/或多播业务的优先级隐式的指示第一信息，可以节省信令开销。
以上第四方面及其可能的设计所示方法的有益效果可参照第三方面及其可能的设计中的有益效果。
第五方面，本申请提供一种通信方法，该方法的执行主体可以是接入网设备，也可以是芯片或电路。方法包括：第一接入网设备向第二接入网设备指示对应关系，所述对应关系为一个或多个PLMN索引值与一个或多个PLMN值之间的一一对应的关系；所述第一接入网设备接收来自终端设备的指示信息，所述指示信息指示终端设备正在接收或期望接收多播业务的信息，所述指示信息包括至少一个PLMN索引值，所述至少一个PLMN索引值属于所述一个或多个PLMN索引值；所述第一接入网向所述第二接入网设备发送所述指示信息。
一种可能的设计中，所述指示信息指示终端设备正在接收或期望接收多播业务的如下至少一项信息：频率信息、TMGI、SCS、或调制阶数。
一种可能的设计中，第一接入网设备向第二接入网设备指示对应关系，包括：
所述第一接入网设备向所述第二接入网设备发送SIB1中的PLMN标识信息，所述PLMN标识信息指示所述对应关系。
一种可能的设计中，第一接入网设备向第二接入网设备指示对应关系，包括：
所述第一接入网设备向所述第二接入网设备发送Xn接口建立消息或者NG-RAN节点配置更新消息，所述Xn接口建立消息或者NG-RAN节点配置更新消息包括至少一个小区的信息，所述至少一个小区中第一小区的信息中指示所述第一小区的至少一个PLMN以及每个PLMN对应的PLMN索引值。
一种可能的设计中，第一接入网设备向第二接入网设备指示对应关系，包括：
所述第一接入网设备向所述第二接入网设备发送Xn接口建立消息或者NG-RAN节点配置更新消息，所述Xn接口建立消息或者NG-RAN节点配置更新消息包括至少一个小区的信息，所述至少一个小区中第n个小区的信息中指示所述第n个小区的至少一个PLMN以及偏置，所述偏置为所述至少一个小区中第一个小区至第n-1个小区的PLMN总数，所述n为大于0的整数。
第六方面，本申请提供一种通信方法，该方法的执行主体可以是接入网设备，也可以 是芯片或电路。方法包括：第二接入网设备从第一接入网设备获取对应关系，所述对应关系为一个或多个PLMN索引值与一个或多个PLMN值之间的一一对应的关系；所述第二接入网设备接收来自所述第一接入网设备的指示信息，所述指示信息指示终端设备正在接收或期望接收多播业务的信息，所述指示信息包括至少一个PLMN索引值；所述第二接入网根据所述对应关系确定所述至少一个PLMN索引值对应的PLMN值。
一种可能的设计中，所述指示信息指示终端设备正在接收或期望接收多播业务的如下至少一项信息：频率信息、TMGI、SCS、或调制阶数。
一种可能的设计中，第二接入网设备从第一接入网设备获取对应关系，包括：
所述第二接入网设备接收来自所述第一接入网设备发送SIB1中的PLMN标识信息，所述PLMN标识信息指示所述对应关系。
一种可能的设计中，第二接入网设备从第一接入网设备获取对应关系，包括：
所述第二接入网设备接收来自所述第一接入网设备发送Xn接口建立消息或者NG-RAN节点配置更新消息，所述Xn接口建立消息或者NG-RAN节点配置更新消息包括至少一个小区的信息，所述至少一个小区中第一小区的信息中指示所述第一小区的至少一个PLMN值以及每个PLMN对应的PLMN索引值。
一种可能的设计中，第二接入网设备从第一接入网设备获取对应关系，包括：
所述第二接入网设备接收来自所述第一接入网设备发送Xn接口建立消息或者NG-RAN节点配置更新消息，所述Xn接口建立消息或者NG-RAN节点配置更新消息包括至少一个小区的信息，所述至少一个小区中第n个小区的信息中指示所述第n个小区的至少一个PLMN值以及偏置，所述偏置为所述至少一个小区中第一个小区至第n-1个小区的PLMN总数，所述n为大于0的整数。
第七方面，本申请提供一种通信方法，该方法的执行主体可以是接入网设备，也可以是芯片或电路。方法包括：第一接入网设备接收来自终端设备的第一指示信息，所述第一指示信息指示终端设备正在接收或期望接收多播业务的信息，所述第一指示信息包括至少一个PLMN索引值；所述第一接入网设备向第二接入网设备发送第二指示信息，所述第二指示信息中的PLMN信息为所述至少一个PLMN索引值对应的PLMN值。
一种可能的设计中，所述第一指示信息指示终端设备正在接收或期望接收多播业务的如下至少一项信息：频率信息、TMGI、SCS、或调制阶数。
一种可能的设计中，所述第二指示信息为将所述第一指示信息中的所述至少一个PLMN索引值替换成所述至少一个PLMN索引值对应的PLMN值得到的。
第八方面，本申请提供一种通信方法，该方法的执行主体可以是终端设备，也可以是芯片或电路。方法包括：终端设备接收来自接入网设备的业务信息，所述业务信息包括第一TMGI，所述第一TMGI中包括第一PLMN索引值；所述终端设备向接入网设备发送指示信息，所述指示信息指示终端设备正在接收或期望接收多播业务的信息，所述指示信息包括第二TMGI，所述第二TMGI包括所述第一PLMN索引值对应的PLMN值，其中，第一TMGI和第二TMGI中的服务标识(service ID)相同。
一种可能的设计中，所述指示信息指示终端设备正在接收或期望接收多播业务的如下至少一项信息：频率信息、TMGI、SCS、或调制阶数。
一种可能的设计中，所述第二TMGI为所述终端设备接收到的应用层消息携带的TMGI。
另一种可能的设计中，所述第二TMG为所述终端设备根据所述第一TMGI以及所述第一PLMN索引值对应的PLMN值生成的。
第九方面，本申请还提供一种通信装置，该通信装置具有实现上述第一方面或第三方面或第八方面提供的任一方法。该通信装置可以通过硬件实现，也可以通过硬件执行相应的软件实现。该硬件或软件包括一个或多个与上述功能相对应的单元或模块。
在一种可能的设计中，该通信装置包括：处理器，该处理器被配置为支持该通信装置执行以上所示方法中终端设备的相应功能。该通信装置还可以包括存储器，该存储可以与处理器耦合，其保存该通信装置必要的程序指令和数据。可选地，该通信装置还包括接口电路，该接口电路用于支持该通信装置与接入网设备等设备之间的通信。
在一种可能的设计中，该通信装置包括相应的功能模块，分别用于实现以上方法中的步骤。功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。硬件或软件包括一个或多个与上述功能相对应的模块。
在一种可能的设计中，通信装置的结构中包括处理模块和通信模块，这些模块可以执行上述方法示例中相应功能，具体参见第一方面或第三方面提供的方法中的描述，此处不做赘述。
第十方面，本申请还提供一种通信装置，该通信装置具有实现上述第二方面或第四方面或第五方面或第六方面或第七方面提供的任一方法。该通信装置可以通过硬件实现，也可以通过硬件执行相应的软件实现。该硬件或软件包括一个或多个与上述功能相对应的单元或模块。
在一种可能的设计中，该通信装置包括：处理器，该处理器被配置为支持该通信装置执行以上所示方法中接入网设备的相应功能。该通信装置还可以包括存储器，该存储可以与处理器耦合，其保存该通信装置必要的程序指令和数据。可选地，该通信装置还包括接口电路，该接口电路用于支持该通信装置与终端设备等设备之间的通信。
在一种可能的设计中，该通信装置包括相应的功能模块，分别用于实现以上方法中的步骤。功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。硬件或软件包括一个或多个与上述功能相对应的模块。
在一种可能的设计中，通信装置的结构中包括处理模块和通信模块，这些模块可以执行上述方法示例中相应功能，具体参见第二方面或第四方面提供的方法中的描述，此处不做赘述。
第十一方面，提供了一种通信装置，包括处理器和接口电路，接口电路用于接收来自该通信装置之外的其它通信装置的信号并传输至该处理器或将来自该处理器的信号发送给该通信装置之外的其它通信装置，该处理器通过逻辑电路或执行代码指令用于实现前述第一方面或第三方面或第八方面以及任意可能的设计中的方法。
第十二方面，提供了一种通信装置，包括处理器和接口电路，接口电路用于接收来自该通信装置之外的其它通信装置的信号并传输至该处理器或将来自该处理器的信号发送给该通信装置之外的其它通信装置，该处理器通过逻辑电路或执行代码指令用于实现前述第二方面或第四方面或第五方面或第六方面或第七方面以及任意可能的设计中的方法。
第十三方面，提供了一种计算机可读存储介质，该计算机可读存储介质中存储有计算机程序或指令，当该计算机程序或指令被处理器执行时，实现前述第一方面至第八方面中任一方面以及任意可能的设计中的方法。
第十四方面，提供了一种存储有指令的计算机程序产品，当该指令被处理器运行时，实现前述第一方面至第八方面中任一方面以及任意可能的设计中的方法。
第十五方面，提供一种芯片系统，该芯片系统包括处理器，还可以包括存储器，用于实现前述第一方面至第八方面中任一方面以及任意可能的设计的方法。该芯片系统可以由芯片构成，也可以包含芯片和其他分立器件。
第十六方面，提供一种通信系统，所述系统包括第一方面所述的装置(如终端设备)和第二方面所述的装置(如接入网设备)。或者，所述系统包括第三方面所述的装置(如终端设备)和第四方面所述的装置(如接入网设备)。或者，所述系统包括第五方面所述的装置(如第一接入网设备)和第六方面所述的装置(如第二接入网设备)。或者，所述系统包括第七方面所述的装置(如第一接入网设备)和第二接入网设备。或者，所述系统包括第八方面所述的装置(如终端设备)和接入网设备。
附图说明
图1为本申请实施例的一种多播业务示意图；
图2为本申请实施例的一种多播场景示意图；
图3为本申请实施例的一种特性集组合示意图；
图4为本申请实施例的一种能力信息的结构示意图；
图5为本申请实施例的一种通信系统的架构示意图；
图6为本申请实施例的另一种通信系统的架构示意图；
图7为本申请实施例的一种通信方法的流程示意图；
图8为本申请实施例的一种发送组播业务的流程示意图；
图9为本申请实施例的一种能力信息的结构示意图；
图10为本申请实施例的一种通信方法的流程示意图；
图11为本申请实施例的一种通信装置的结构示意图；
图12为本申请实施例的一种通信装置的结构示意图。
具体实施方式
为了使本申请的目的、技术方案和优点更加清楚，下面将结合附图对本申请作进一步地详细描述。方法实施例中的具体操作方法也可以应用于装置实施例或系统实施例中。
以下，对本申请实施例中的部分用语进行解释说明，以便于本领域技术人员理解。
1)MBS：MBS是同时面向多个终端设备传输的业务，例如直播业务、公共安全业务、批量软件更新业务等。多播业务可以包括组播、广播等多播业务中的一项或多项，多播业务也可以称为组播业务、广播业务、组播/广播业务、组播/多播业务、多播/广播业务等。MBS来自数据服务器，首先数据服务器将MBS的数据发送给核心网设备，然后核心网设备将MBS的数据发送给接入网设备，最后接入网设备将MBS的数据发送给接收MBS的至少一个终端设备。核心网设备向接入网设备发送MBS的数据的时候，MBS的数据通过一个公共的传输通道即MBS会话进行传输，而接入网设备向终端设备发送的时候，有两种传输方式：第一种可以采用点到多点(point to multi-point，PTM)传输方式；第二种可以采用点到点(point to point，PTP)传输方式。如图1所示。
本申请实施例中，MBS也可以称为“MBS业务”“MBS广播服务”“MBS会话”“MBS广播业务”“MBS服务”等等。
对于一个终端设备来说，支持从一个接入网设备接收MBS业务，从另一个接入网设备接收单播业务，如图2所示。或者，也可以从一个接入网设备接收MBS业务和单播业务。
需要说明的是，MBS仅是多播业务的一种示例性命名，不同通信制式下对多播业务的命名可以不同，例如，在长期演进(long term evolution，LTE)中多播业务可以称为多媒体广播多播业务(multimedia broadcast multicast service，MBMS)，在新空口(new radio，NR)中多播业务可以称为MBS，在未来通信发展中，多播业务也可以命名为其他，本申请不做具体限定，下文统一称为多播业务。
2)只接收模式(receive only mode，ROM)模式是指：一种允许终端设备仅接收多播广播业务而无需访问提供多播广播服务的公用陆地移动网(public land mobile network，PLMN)并向其注册的模式。
3)终端设备能力上报
网络设备通过能力查询的过程来获取终端设备的能力信息。在能力查询过程中，网络设备向终端设备发送指示信息，指示信息用于指示终端设备需要上报的能力参数。终端设备根据指示信息的指示上传相应的能力信息。
目前，有终端设备具有多无线接入技术(radio access technology，RAT)能力，多RAT能力是指终端设备同时在多个RAT工作时的能力。多RAT能力的一种典型代表是演进的通用陆基无线接入及新空口的双连接模式(E-UTRA-NR dual connectivity，EN-DC)。EN-DC是LTE和NR一起作为双连接模式工作的方式，并且LTE为主节点，即一个终端设备同时连接LTE网络设备和NR网络设备，同时由这两个网络设备提供服务。多RAT能力在能力请求时也作为一个能力类型来请求。
NR中的终端设备能力结构：不同终端设备由于硬件或者软件版本的不同，一个RAT内部支持的能力并不相同，为了网络更好的为终端设备提供服务，网络需要知道终端设备的能力，以便为终端设备配置合适的工作模式。
NR的终端设备的能力结构包括频带组合信息(Band Combination Lists)和频带信息。
频带组合信息包括频带列表(Band Lists)和特性集组合(Feature Sets Combinations)。
Band Lists包括终端设备支持的频带组合，并指示该频带组合中具体包含哪些频带，比如band1+band2+band3。当然，即使只支持一个band也是通过该结构上报。
Feature Sets Combinations表示终端设备在band组合上支持的能力。Feature Sets Combinations是一个包括多个Feature Sets Combination的集合，其中每个Feature Sets Combination是包含多个特性集索引(featuresetID)的矩阵型元素，每个featuresetID与一个band相关联。举例说明，如图3所示，为包括band A、band B和band C的band组合关联的FeatureSetsCombination，其中，每一行，分别对应band A，B,C使用的上行和下行的featuresetID。不同的行表示UE在这个band组合支持的不同的featureset组合。以第一行为例，UE在band A、band B和band C这个组合支持的不同的特性集合的矩阵元素分别为(0,0)、(2,4)、(1,2)，可以理解，对于矩阵元素(0,0),表示在band A上使用的上行特性集索引和下行特性集索引均为0；对于矩阵元素(2,4),表示在band B上使用的上行特性集索引为2和下行特性集索引为4，以此类推。
featuresetID对应一组通信参数，用于表示终端设备在这个band上支持的能力，例如载波个数，载波带宽和多入多出技术(multiple-input multiple-output，MIMO)能力等。其中，featuresetID对应的通信参数可以包括终端设备在整个band上支持的能力，以及在该band的各个CC)上支持的能力(featureset perCC)。
频带信息可以为包括频带列表(Band Lists)。Band Lists包括终端设备支持的band，以及终端设备在各个band上支持的能力。
示例性的，终端设备的能力结构可以如图4所示。
应理解，这终端设备的能力结构还可以包括未示出的其他信息，如终端设备级别的能力信息等，这里不做具体限定。
4)终端设备能力查询过程
网络设备和终端设备之间会进行单播的通信，因此网络设备通常会通过能力查询过程来获取终端设备的能力，以便网络设备根据终端设备的能力以单播的方式收发数据。在能力查询过程中，网络设备可以向终端设备发送能力查询信息，用于请求终端设备的能力。
能力查询信息中通常会包括信元，信元中包括有多个字段用于指示所需要请求的终端设备的能力。网络设备发送的能力查询信息的信元可以是一个过滤函数，例如：UE-Capability Request Filter Common。过滤函数用于请求过滤的终端设备的能力。过滤的终端设备的能力是指符合网络设备要求的终端设备的能力，因此，通过过滤函数网络设备可以获得其指示终端设备上报的终端设备的能力。
5)终端设备，包括向用户提供语音和/或数据连通性的设备，具体的，包括向用户提供语音的设备，或包括向用户提供数据连通性的设备，或包括向用户提供语音和数据连通性的设备。例如可以包括具有无线连接功能的手持式设备、或连接到无线调制解调器的处理设备。该终端设备可以经无线接入网(radio access network，RAN)与核心网进行通信，与RAN交换语音或数据，或与RAN交互语音和数据。该终端设备可以包括UE、无线终端设备、移动终端设备、设备到设备通信(device-to-device，D2D)终端设备、车到一切(vehicle to everything，V2X)终端设备、机器到机器/机器类通信(machine-to-machine/machine-type communications，M2M/MTC)终端设备、物联网(internet of things，IoT)终端设备、订户单元(subscriber unit)、订户站(subscriber station)，移动站(mobile station)、远程站(remote station)、接入点(access point，AP)、远程终端(remote terminal)、接入终端(access terminal)、用户终端(user terminal)、用户代理(user agent)、或用户装备(user device)等。例如，可以包括移动电话(或称为“蜂窝”电话)，具有移动终端设备的计算机，便携式、袖珍式、手持式、计算机内置的移动装置等。例如，个人通信业务(personal communication service，PCS)电话、无绳电话、会话发起协议(session initiation protocol，SIP)话机、无线本地环路(wireless local loop，WLL)站、个人数字助理(personal digital assistant，PDA)、等设备。还包括受限设备，例如功耗较低的设备，或存储能力有限的设备，或计算能力有限的设备等。例如包括条码、射频识别(radio frequency identification，RFID)、传感器、全球定位系统(global positioning system，GPS)、激光扫描器等信息传感设备。
作为示例而非限定，在本申请实施例中，该终端设备还可以是可穿戴设备。可穿戴设备也可以称为穿戴式智能设备或智能穿戴式设备等，是应用穿戴式技术对日常穿戴进行智能化设计、开发出可以穿戴的设备的总称，如眼镜、手套、手表、服饰及鞋等。可穿戴设 备即直接穿在身上，或是整合到用户的衣服或配件的一种便携式设备。可穿戴设备不仅仅是一种硬件设备，更是通过软件支持以及数据交互、云端交互来实现强大的功能。广义穿戴式智能设备包括功能全、尺寸大、可不依赖智能手机实现完整或者部分的功能，例如：智能手表或智能眼镜等，以及只专注于某一类应用功能，需要和其它设备如智能手机配合使用，如各类进行体征监测的智能手环、智能头盔、智能首饰等。
本申请实施例中，终端设备还可以包括中继(relay)。或者理解为，能够与基站进行数据通信的都可以看作终端设备。
本申请实施例中，用于实现终端设备的功能的装置可以是终端设备，也可以是应用于终端设备中能够支持终端设备实现该功能的装置，例如具备通信功能的部件或组件，或者芯片系统，该装置可以被安装在终端设备中。本申请实施例中，芯片系统可以由芯片构成，也可以包括芯片和其他分立器件。本申请实施例提供的技术方案中，以用于实现终端的功能的装置是终端设备为例，描述本申请实施例提供的技术方案。
6)网络设备，例如包括接入网(access network，AN)设备，例如基站(例如，接入点)，可以是指接入网中在空口通过一个或多个小区与终端设备通信的设备。网络设备可以包括LTE系统或高级长期演进(long term evolution-advanced，LTE-A)中的演进型基站(NodeB或eNB或e-NodeB，evolutional Node B)，或者也可以包括第五代移动通信技术(the 5th generation，5G)NR系统(也简称为NR系统)中的下一代节点B(next generation node B，gNB)或者也可以包括云接入网(cloud radio access network，Cloud RAN)系统中的集中式单元(centralized unit，CU)和/或分布式单元(distributed unit，DU)，本申请实施例并不限定。例如网络设备可以为Cloud RAN系统中的CU，或为DU，或为CU和DU的整体。
网络设备还可以包括核心网设备，核心网设备例如包括访问和移动管理功能(access and mobility management function，AMF)等。本申请实施例由于主要涉及接入网，因此在后文中如无特殊说明，则所述的网络设备均是指接入网设备。
本申请实施例中，用于实现网络设备的功能的装置可以是网络设备，也可以是能够支持网络设备实现该功能的装置，例如芯片系统，该装置可以被安装在网络设备中。在本申请实施例提供的技术方案中，以用于实现网络设备的功能的装置是网络设备为例，描述本申请实施例提供的技术方案。
本申请实施例中“至少一个”是指一个或者多个，“多个”是指两个或两个以上。“和/或”，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的情况，其中A，B可以是单数或者复数。字符“/”一般表示前后关联对象是一种“或”的关系。“以下至少一项(个)”或其类似表达，是指的这些项中的任意组合，包括单项(个)或复数项(个)的任意组合。例如，a,b,或c中的至少一项(个)，可以表示：a，b，c，a和b，a和c，b和c，或a和b和c，其中a,b,c可以是单个，也可以是多个。
以及，除非有相反的说明，本申请实施例提及“第一”、“第二”等序数词是用于对多个对象进行区分，不用于限定多个对象的大小、内容、顺序、时序、优先级或者重要程度等。例如，第一参数和第二参数，只是为了区分不同的参数，而并不是表示这两个参数的内容、数值、优先级或者重要程度等的不同。
前文介绍了本申请实施例所涉及到的一些名词概念，下面介绍本申请实施例涉及的技 术特征。
在移动通信系统中，终端设备和网络设备的通信是在band上进行的。不同的终端设备可能支持不同的频带或不同的频带组合，终端设备在不同的频带或频带组合上可能具有不同的基带能力。基带能力可能包括：载波带宽、载波个数、支持的信道状态指示符(channel state indicator，CSI)进程数、多入多出(multiple-input multiple-output，MIMO)层数等。终端设备需要向网络设备上报支持的频带或频带组合，以及基带能力信息。网络设备根据终端设备的能力进行业务的资源配置。
在一种场景下，终端设备可以支持在执行单播操作的时候还接收广播多播业务，此时单播和广播多播业务共享终端设备的基带能力。因此，终端设备有必要将其在执行单播操作的时候还接收多播广播的能力上报给网络设备，以便网络设备根据终端设备上报的能力信息进行多播广播业务的配置。目前，在LTE中，终端设备上报接收多播广播的能力的方式为，在能力信息中上报mbms-MaxBW，其中，mbms-MaxBW指示MBS接收支持的最大带宽。
当前LTE设计的多播能力信息为UE级别，不区分band和载波，只支持上报用于MBS的最大带宽。现有NR的多播业务可能只在UE的某个band上支持，如果复用LTE的多播能力将不能对NR的UE的多播能力进行精准上报。
基于此，本申请实施例提供一种通信方法及装置，用于解决终端设备的多播能力上报准确性较低的问题。其中，方法和装置是基于同一发明构思的，由于方法及装置解决问题的原理相似，因此装置与方法的实施可以相互参见，重复之处不再赘述。
本申请提供的通信方法可以应用于各类通信系统中，例如，可以是物联网(internet of things，IoT)、窄带物联网(narrow band internet of things，NB-IoT)、长期演进(long term evolution，LTE)，也可以是第五代(5G)通信系统，还可以是LTE与5G混合架构、也可以是5G新无线(new radio，NR)系统以及6G或者未来通信发展中出现的新的通信系统等。本申请所述的通信系统还可以是机器到机器(machine to machine，M2M)网络或者其他网络。
参阅图5所示，为本申请实施例提供的一种通信系统，该通信系统可以包括终端设备、接入网设备，还可以包括核心网设备。在该通信系统中，终端设备可以从接入网设备接收多播业务。
参阅图6所示，为本申请实施例提供的一种通信系统，该通信系统可以包括终端设备、两个接入网设备，分别为接入网设备1和接入网设备2。在该通信系统中，终端设备可以从接入网设备1接收单播业务，从接入网设备2接收多播业务，两种业务可以共享终端设备的基带能力。
可选的，接入网设备1和接入网设备2可以连接不同的核心网设备，例如，通信系统还可以包括核心网设备1和核心网设备2，其中，接入网设备1连接核心网设备1，接入网设备2连接核心网设备2，如图6所示。
或者，接入网设备1和接入网设备2也可以连接同一个核心网设备，例如，通信系统包括核心网设备3，接入网设备1和接入网设备2均连接核心网设备3。
本申请实施例描述的网络架构以及业务场景是为了更加清楚的说明本申请实施例的技术方案，并不构成对于本申请实施例提供的技术方案的限定，本领域普通技术人员可知，随着网络架构的演变和新业务场景的出现，本申请实施例提供的技术方案对于类似的技术 问题同样适用。
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描述。
如图7所示，为本申请实施例提供的一种通信方法的流程示意图。
S801，终端设备确定能力信息。
能力信息指示band对应的接收多播业务的能力，和/或，CC对应的接收多播业务的能力。示例性的，多播业务可以包括组播业务、广播业务等。
其中，能力信息指示band对应的接收多播业务的能力，可以理解为，能力信息包括band级别(per band)的接收多播业务的能力。能力信息指示CC对应的接收多播业务的能力，可以理解为，能力信息包括CC级别(per CC)的接收多播业务的能力。
本申请实施例中，“接收多播业务的能力”也可以替换为“接收MBS服务的能力”、“MBS能力”、“组播能力”、“广播能力”、“ROM能力”、或“免费接收(free to air，FTA)能力”等，本申请实施例以“接收多播业务的能力”为例进行说明。
能力信息指示band对应的接收多播业务的能力，和/或，CC对应的接收多播业务的能力的具体方式将在下文详细说明。
需要说明的是，步骤S801可以是一个可选的步骤，即终端设备可以不体现确定能力信息的过程。
S802，终端设备向接入网设备发送能力信息。相应的，接入网设备接收来自终端设备的能力信息。
可选的，在步骤S802之前，或者在S801之前，接入网设备可以向终端设备发送能力上报指示信息，能力上报指示信息指示终端设备上报接收多播业务的能力。
具体的，能力上报指示信息指示终端设备上报接收多播业务的能力。具体包括：能力上报指示信息指示终端设备上报所有支持多播业务的band对应的能力或者当前或指定PLMN下包含的所有支持多播业务的band对应的能力。举例说明，能力上报指示信息可以是一个或多个比特的取值指示是否上报。或者，能力上报指示信息可以通过是否携带一个或多个比特指示是否上报。又或者，能力上报指示信息中的字段通过true/false指示是否上报。
或者，能力上报指示信息指示终端设备上报接收多播业务的能力。具体包括：能力上报指示信息可以携带一个或多个band的索引或者标识，能力上报指示信息指示终端设备上报该一个或多个band的接收多播业务的能力。
S803，接入网设备根据能力信息确定终端设备的能力。
一种实现方式中，接入网设备可以根据能力信息向终端设备发送多播业务。
例如，在图5所示的通信系统中，终端设备向接入网设备发送能力信息，接入网设备可以根据能力信息向终端设备发送组播业务。具体的，终端设备向接入网设备发送能力信息之后，接入网设备可以根据能力信息配置组播业务的MRB，如可以通过RRC配置消息配置MRB。接入网设备在配置完MRB之后发送组播业务，如图8所示。
另一种实现方式中，接入网设备可以根据能力信息向终端设备发送单播业务。
例如，在图6所示的通信系统中，终端设备向接入网设备1发送能力信息，接入网设备1可以根据能力信息向终端设备发送单播业务。
一种具体的实现方式中，终端设备向接入网设备发送能力信息之外，还可以向接入网设备发送指示信息，该指示信息指示终端设备正在接收或者期望接收的多播业务的信息， 如会话标识、使用的SCS、BW、频率等信息。接入网设备可以根据终端设备上报的能力信息和指示信息选择终端设备支持的一组能力信息集合，从而可以在不影响终端设备接收多播业务的情况下，向终端设备发送单播业务。
可选的，终端设备还可以向接入网设备发送指示信息，指示信息可以指示正在接收或者期望接收的多播业务的调制阶数，例如可以通过MBS感兴趣指示(MBS interest indication，MII)指示正在接收或者期望接收的多播业务的调制阶数等等。可选的，指示信息还可以指示终端设备正在接收或期望接收多播业务的如下至少一项信息：频率信息(如带宽和/或频点等)、TMGI、SCS。
本申请不限定指示信息的名称(或者类型)，下文中也可以将MII可以替换成其他指示UE感兴趣的业务的信息，比如用户辅助信息(user assitance information，UAI)等等。为了便于描述，下面以指示信息为MII为例进行说明。
需要说明的是，MII的触发方式、发送方式以及内容可以不依赖于图8所述方法单独实施。若MII的触发方式、发送方式以及内容单独实施，MII指示的信息可以包括上述指示信息所指示的内容，也可以不包括上述指示信息指示的内容，或者也可以包括上述指示信息中的部分信息。
一种实现方式中，终端设备可以从多播传输逻辑信道(MTCH)配置信息获取正在接收或者期望接收的多播业务的调制阶数。可选的，该实现方式中，终端设备发送指示信息之前，可以接收来自接入网设备的系统信息，该系统信息中包括MCCH配置信息。并根据MCCH配置信息接收MCCH，MCCH上包含MTCH配置信息。
另一种实现方式中，终端设备也可以从下行控制信息(downlink control information，DCI)中获取正在接收或者期望接收的多播业务的调制阶数。具体的，终端设备可以实时上报获取到的调制阶数，也可以获取n次后上报其中最大的调制阶数。
进一步的，终端设备上报正在接收或者期望接收的多播业务的调制阶数之后，还可以更新该调制阶数，例如，从DCI中获取到正在接收或者期望接收的多播业务更新后的调制阶数后，向接入网设备进行更新。
例如，在图6所示的通信系统中，终端设备向接入网设备1发送能力信息，终端设备可以向接入网设备1发送MII，该MII指示终端设备从接入网设备2正在接收或者期望接收的多播业务的信息。接入网设备1可以根据终端设备上报的能力信息和MII向终端设备发送单播业务。
在LTE中，终端设备通过接收主小区/主服务小区(primary cell/primary serving cell，Pcell)的SIB2中的mbms-ROM-ServiceIndicatio触发终端设备上报MII(也就是上述指示信息)，但NR或者未来通信中，可能没有该信息，从而导致无法触发终端设备上报MII。基于此，本申请提供三种触发终端设备上报MII的方法。
第一种方法为：接入网设备向终端设备发送第四信息指示是否上报MII。第四信息可以用于指示上报异PLMN(inter-PLMN)或者异运营商(inter-operator)或者跨基站或者非服务小区(non-servingcell)或者异频接收的多播业务。
在该方法中，终端设备在接收到第四信息后，可以确定是否需要上报MII。下面介绍四种确定方法，应理解，该四种方法可以单独实施，也可以任意两个或三个或四个结合进行实施。
确定方法1：终端设备可以满足如下任一情况时，确定需要上报MII：
情况一：接收的多播业务的TMGI中的PLMN与该接入网设备的服务小区的SIB1中包含的PLMN信息不一致。
情况二：接收多播业务的小区的SIB1中包含的PLMN和该接入网设备的服务小区的SIB1中包含的PLMN不一致。
确定方法1的“不相同”可以理解为接收的多播业务的TMGI(或者SIB1)中的PLMN与该接入网设备的服务小区的SIB1中包含的PLMN至少存在不同的部分。
在该实施方式中，第四信息可以为1个或多个比特。
确定方法2：终端设备可以满足如下任一情况时，确定需要上报MII：
情况三：第四信息包括一个或多个PLMN，接收的多播业务的TMGI中的PLMN与该一个或多个PLMN均不相同。
情况四：第四信息包括一个或多个PLMN，接收多播业务的小区的SIB1中包含的PLMN与所述一个或多个PLMN均不相同。
确定方法2的“不相同”可以理解为接收的多播业务的TMGI(或者SIB1)中的PLMN与该一个或多个PLMN中的任一PLMN至少存在不同的部分。
确定方法3：终端设备可以在满足如下情况中一项或多项时，确定需要上报MII：
情况五：接收多播业务的频点不属于该接入网设备的服务小区的SIB 21中包含的频点。
情况六：接收多播业务的频点与USD中包括的频点列表中的频点均不相同。
确定方法4：终端设备可以在满足如下情况时，确定需要上报MII：
情况七：此指示信息包括一个或多个频点信息，接收的多播业务的频点与该一个或多个频点均不相同。
上述四种确定方法中，上述接入网设备可以图6所示场景中的接入网设备1，接收的多播业务可以是从接入网设备2的。
第二种方法为：协议可以规定接入网设备的服务小区必须发送SIB21用于触发终端设备可以上报MII。该接入网设备可以是图6所示场景中的接入网设备1。
第三种方法为：终端设备可以判断需要上报MII。
例如，终端设备可以在满足inter-PLMN或者inter-operator的情况下确定上报在异PLMN(inter-PLMN)或者inter-operator接收的多播业务。
具体可以参阅上述确定方法1或确定方法2，这里不再赘述。
又例如，终端设备可以在满足异频的情况下确定上报在异频接收的多播业务。
具体可以参阅上述确定方法3或确定方法4，这里不再赘述。
以上介绍了三种触发终端设备上报MII的方法。下面结合上述三种方法介绍终端设备上报的MII的内容。
基于上述第一种方法，终端设备可以根据第四信息确定需要上报MII，并基于该第四信息确定MII中包括的频率信息(例如频点和/或带宽等)/TMGI/SCS/调制阶数等等。
基于上述第三种方法，终端设备可以根据异operator/异PLMN/异频/非服务小区确定需要上报MII，并根据operator/PLMN/频点确定MII中包括的频率信息(例如频点和/或带宽等)/TMGI/SCS/调制阶数等等。
基于上述第二种方法，终端设备可以根据SIB21确定需要上报MII，并基于operator/PLMN/频点确定MII中包括的频率信息(例如频点和/或带宽等)/TMGI/SCS/调制阶数等等。
本申请实施例终端设备可通过能力信息指示频带(或称band)级别和/或CC级别的多播能力，从而提升多播能力上报的精度，使得接入网设备可以获取精细化的能力信息。一种可能的实现，接入网设备可以根据精细化的能力信息提供多播业务和/或单播业务，例如，可以根据精细化的能力信息配置或选择多播业务和/或单播业务的通信参数。
下面结合能力信息的结构对能力信息指示band对应的接收多播业务的能力，和/或，CC对应的接收多播业务的能力的方式进行介绍。
一种示例性说明中，可以通过能力信息中的频带组合信息指示band对应的接收多播业务的能力，和/或，CC对应的接收多播业务的能力，或者，也可以通过能力信息中的频带信息指示band对应的接收多播业务的能力。下文中将分别介绍通过频带组合信息指示band对应的接收多播业务的能力，和/或，CC对应的接收多播业务的能力的示例，以及通过频带信息指示band对应的接收多播业务的能力的示例。
通过频带组合信息指示band对应的接收多播业务的能力，和/或，CC对应的接收多播业务的能力，可以通过如下四种方式实现：
方式一：根据前文术语介绍3)可知，能力信息包括Band Combination Lists，其中，包括Band Lists和Feature Sets Combinations。在本方式中，可以通过在Band Combination Lists中的Band Lists列举支持接收多播业务的band，并通过该Band List对应的Feature Sets Combination指示在支持接收多播业务的band上接收多播业务的能力。
示例1，能力信息包括第一频带组合列表以及第一特性集组合的标识。其中，第一频带组合列表包括第一频带信息，第一频带信息包括支持接收多播业务的N个band的标识，N为大于0的整数。第一特性集组合包括第一频带组合列表对应的至少一个第一参数集合，任一第一参数集合指示N个band分别对应的接收多播业务的能力，和/或，N个band中每个band上CC对应的接收多播业务的能力。示例性的，N可以为1，2，3，4，5，6，7，8，9，10等等。一种实现方式中，网络设备可以指示终端设备上报的支持多播业务的频带的数量N，或者也指示终端设备上报的支持多播业务的频带的最大数量。
可选的，该第一频带组合列表还可以包括第二频带信息，第二频带信息包括支持单播业务的M个band的标识，M为大于0的整数；任一第一参数集合还指示M个band分别对应的接收单播业务的能力，或者，任一第一参数集合还指示M个band分别对应的接收通信业务的能力，通信业务包括单播业务和多播业务。
本示例1中，第一频带组合列表列举了终端设备支持单播业务的M个band的标识以及支持多播业务的N个band的标识。这里根据band上支持的通信业务对band进行区分，如果终端设备在一个band上支持接收多播业务，则在第一频带信息包括该band的标识，如果终端设备在一个band上支持接收单播业务，则在第二频带信息包括该band的标识。如果一个band既支持接收多播业务，也支持接收单播业务，则该band的标识包括在第一频带信息和第二频带信息中，即第一频带组合列表中该band的标识出现两次。
作为一种示例，本方式中，能力信息的结构可以为：能力信息包括第一频带组合列表和第一特性集组合的标识。第一频带组合列表包括支持接收多播业务的N个band的标识以及支持接收单播业务的M个band的标识，其中，若一个band支持接收多播业务和单播业务，则该band的标识在第一频带组合列表中出现两次。第一特性集组合包含多个特性集索引(featuresetID)的矩阵型元素，每个特性集索引与一个band相关联。其中，每一行特性集索引可以认为是一个第一参数集合，每一行特性集索引即第一参数集合表示终端设备 在这个band组合上支持的特性集组合。第一特性集组合的每一行特性集索引即每一个第一参数集合可以包括上述N个band对应的特性集索引，还可以包括上述M个band对应的特性集索引。
其中，N个band中每个band对应的特性集索引对应一组通信参数，用于表示终端设备在这个band上接收多播业务的能力。M个band中每个band对应的特性集索引对应一组通信参数，用于表示终端设备在这个band上接收单播业务的能力，或者，用于表示终端设备在这个band上接收通信业务的能力，该通信业务包括单播业务和多播业务，还可以包括其他业务，这里不做具体限定。
可选的，M个band对应的特性集索引可以包括两部分，分别为上行特性集索引和下行特性集索引。其中，上行特性集索引可以对应一组通信参数，其中，该组通信参数可以包括band级别的通信参数，和CC级别的通信参数。该组通信参数中，band级别的通信参数用于指示在band上进行上行发送的能力。CC级别的通信参数用于指示在CC上进行上行发送的能力。
下行特性集索引可以对应一组通信参数，其中，该组通信参数可以包括band级别的通信参数，和CC级别的通信参数。该组通信参数中，band级别的通信参数用于指示在band上接收单播业务的能力。CC级别的通信参数用于指示在band上接收单播业务的能力。或者，该组通信参数中，band级别的通信参数用于指示在band上接收通信业务的能力。CC级别的通信参数用于指示在CC上接收通信业务的能力。
N个band对应的特性集索引可以包括下行特性集索引。下行特性集索引可以对应一组通信参数，其中，该组通信参数可以包括band级别的通信参数，和CC级别的通信参数。该组通信参数中，band级别的通信参数用于指示在band上接收多播业务的能力。CC级别的通信参数用于指示在band上接收多播业务的能力。
举例说明，M个band的上行特性集索引对应的通信参数中包括的band级别的通信参数、M个band的下行特性集索引对应的通信参数中包括的band级别的通信参数、或者N个band的下行特性集索引对应的通信参数中包括的band级别的通信参数可以包括以下类型的通信参数中至少一项：SCS、BW、多入多出技术(multiple-input multiple-output，MIMO)层数(MIMO layers)、调制阶数(ModulationOrder)等。
可选的，N个band的下行特性集索引对应的通信参数中包括的band级别的通信参数还包括：支持接收多播业务的标记。
M个band的上行特性集索引对应的通信参数中包括的CC级别的通信参数、M个band的下行特性集索引对应的通信参数中包括的CC级别的通信参数、或者N个band的下行特性集索引对应的通信参数中包括的CC级别的通信参数可以包括以下类型的通信参数中至少一项：CC对应的SCS、CC对应的BW、CC对应的MIMO layers、CC对应的ModulationOrder等。
或者，N个band的下行特性集索引对应的通信参数中包括的CC级别的通信参数也可以是一个能力值，该能力值可以是根据上述SCS等参数确定的。一种实现方式中，该能力值可以是SCS、BW、MIMO layers以及ModulationOrder的加权和。另一种实现方式中，该能力值可以是SCS、BW、MIMO layers以及ModulationOrder的乘积。当然，能力值也可以是根据其他计算方式确定的，这里不做具体限定。
可选的，N个band的下行特性集索引对应的通信参数中包括的CC级别的通信参数还 包括：支持接收多播业务的标记。
下面结合具体例子对示例1进行举例说明。
假设终端设备在band A和band B上支持接收单播业务，在band B和band C上支持接收多播业务，能力信息的结构可以如表1所示。
表1
Figure PCTCN2022122879-appb-000001
结合上述表1对示例1进行说明，表1为能力信息中频带组合信息即Band Combination Lists。其中，Band list 1为第一频带组合列表，通过第一频带组合列表可以指示支持接收多播业务的N个band的标识以及支持单播业务的M个band的标识，表1中以band B和band C支持多播业务，band A和band B为例。
featureSetCombinationID 1为第一特性集组合的标识，第一特性集组合包括第一频带组合列表对应的至少一个第一参数集合，其中，每个中括号表示一个第一参数集合，指示终端设备在band组合上支持的一种能力。同一中括号中各小括号依次标识频带组合列表中各band对应的特性集。例如，每个中括号中第一个小括号标识band A对应的特性集，第二个小括号标识band B对应的特性集，第三个小括号标识band B对应的接收多播业务的特性集，第四个小括号标识band C对应的接收多播业务的特性集。
每个小括号中包括的元素为特性集索引，其中，fsul表示上行对应的特性集，fsdl表示下行对应的特性集，n1、n2等为索引值，即fsul_n1表示上行对应的特性集为索引值n1对应的通信参数，fsdl_n1表示下行对应的特性集为索引值n1对应的通信参数。每个特性集索引指示的内容对应相同的结构体，以fsdl_n1为例，如表1所示，fsdl_n1对应：band级别的通信参数，即Per band parameters，以及CC级别的通信参数，即Per CC parameters。 其中，Per CC parameters具体包括CC对应的特征集标识，如，CC1对应的特征集标识fsdlperCC_n1和CC2对应的特征集标识fsdlperCC_n2。
CC对应的特征集标识可以指示CC对应的通信参数，例如可以是CC对应的SCS,BW,MIMO layers,ModulationOrder等。又例如，可以是CC对应的能力值。
应理解，第一特性集组合包括的其他特性集索引指示的内容的结构与fsdl_n1类似，具体可以参阅上面fsdl_n1的相关描述，这里不再一一展开描述。
示例1中，可以通过能力查询中的一个或多个比特触发终端设备上报接收多播业务的band B和band C的能力组合，或者，也可以通过能力查询中的一个或多个比特触发上报band B接收多播业务的能力(其中，band B可以为同一PLMN有的band或者另外PLMN的band),也可以通过能力查询中的MBS的band过滤列表包含bandB和C来触发终端设备上报接收多播业务的bandB和C的能力组合。
示例2，能力信息包括第二频带组合列表以及第二特性集组合的标识；其中，第二频带组合列表包括支持接收多播业务的N个band的标识，N为大于0的整数；第二特性集组合包括第二频带组合列表对应的Q1组参数，其中，每组参数包括Q2个第二参数集合，任一第二参数集合指示N个band分别对应的接收多播业务的能力，和/或，N个band中每个band上CC对应的接收多播业务的能力，Q1为大于0的整数，Q2为大于0的整数。
可选的，能力信息还包括第三频带组合列表，其中，第三频带组合列表包括支持接收单播业务的M个band的标识，M为大于0的整数；第二特性集组合还包括第三频带组合列表对应的Q2个第三参数集合，任一第三参数集合指示M个band分别对应的接收单播业务的能力；其中，Q2个第二参数集合中第i个第二参数集合与Q1组参数中任一组参数中的第i个第一参数集合相对应，其中，i为大于0且不大于Q2的整数。可以理解的，Q2个第二参数集合中第i个第二参数集合与Q1组参数中任一组参数中的第i个第一参数集合组合，可以表示终端设备在这个band组合上支持的特性集组合，所述band组合即第二频带组合列表和第三频带组合列表组合得到的band组合。
本示例2中，第二频带组合列表列举了终端设备支持接收多播业务的N个band的标识，第三频带组合列表列举了终端设备支持接收单播业务的M个band的标识。这里根据band上支持的通信业务对band进行区分。如果终端设备在一个band上支持接收多播业务，则在第二频带组合列表包括该band的标识，如果终端设备在一个band上支持接收单播业务，则在第三频带组合列表包括该band的标识。如果一个band既支持接收多播业务，也支持接收单播业务，则该band的标识包括在第二频带组合列表和第三频带组合列表中。
作为一种示例，本方式中，能力信息的结构可以为：能力信息包括第二频带组合列表、第三频带组合列表和第二特性集组合的标识。第二频带组合列表包括支持接收多播业务的N个band的标识，第三频带组合列表包括支持接收单播业务的M个band的标识。其中，若一个band支持接收多播业务和单播业务，则该band的标识包括在第二频带组合列表和第三频带组合列表中。
第二特性集组合包含第一矩阵和至少一个扩展矩阵。其中，第一矩阵包括多个特性集索引(featuresetID)的矩阵型元素，每个特性集索引与M个band中的一个band相关联。其中，每一行特性集索引可以认为是一个第三参数集合。第一矩阵的每一行特性集索引即每一个第三参数集合包括上述M个band对应的特性集索引。其中，M个band中每个band对应的特性集索引对应一组通信参数，用于表示终端设备在这个band上接收单播业务的能 力，或者，用于表示终端设备在这个band上接收通信业务的能力，该通信业务包括单播业务和多播业务。
每个扩展矩阵包括多个特性集索引(featuresetID)的矩阵型元素，每个特性集索引与N个band中的一个band相关联。其中，每个扩展矩阵的每一行特性集索引可以认为是一个第二参数集合。每个扩展矩阵的每一行特性集索引即每一个第二参数集合包括上述N个band对应的特性集索引。其中，N个band中每个band对应的特性集索引对应一组通信参数，用于表示终端设备在这个band上接收多播业务的能力。
第一矩阵的第i行特性集索引与一个扩展矩阵的第i行特性集索引可以进行组合，组合得到特性集组合可以表示终端设备在这个band组合上支持的特性集组合，所述band组合即第二频带组合列表和第三频带组合列表组合得到的band组合。
关于M个band对应的特性集索引的含义、N个band对应的特性集索引的含义的说明，可以参阅上述示例1中关于M个band对应的特性集索引、N个band对应的特性集索引的说明，这里不再重复赘述。
下面结合具体例子对示例2进行举例说明。
假设终端设备在band A和band B上支持接收单播业务，在band B和band C上支持接收多播业务，能力信息的结构可以如表2所示。
表2
Figure PCTCN2022122879-appb-000002
结合上述表2对示例2进行说明，表2为能力信息中频带组合信息即Band Combination  Lists。其中，Band list extend为第二频带组合列表，通过第二频带组合列表可以指示支持接收多播业务的N个band的标识，表2中以band B和band C支持多播业务为例。Band list 1为第三频带组合列表，通过第二频带组合列表可以指示支持接收单播业务的M个band的标识，表2中以band A和band B支持单播业务为例。
featureSetCombinationID 1为第二特性集组合的标识，第二特性集组合包括Band list 1对应的Q2个第三参数集合。表2中以Q2＝3为例，第二特性集组合包括第一矩阵，第一矩阵中包括Band list 1对应的Q2＝3个第三参数集合，其中，第一矩阵中每个中括号表示一个第三参数集合，同一中括号中各小括号依次标识Band list 1中各band对应的特性集。例如，每个中括号中第一个小括号标识band A对应的特性集，第二个小括号标识band B对应的特性集。
第二特性集组合还包括Band list extend对应的Q1组参数，其中，每组参数包括Q2个第二参数集合。表2中以Q1＝3为例，第二特性集组合包括Q1＝3个扩展矩阵，每个扩展矩阵为Band list extend对应的一组参数，其中，包括Q2＝3个第二参数集合，其中，每个扩展矩阵中每个中括号表示一个第二参数集合，同一中括号中各小括号依次标识Band list extend中各band对应的接收多播业务的特性集。例如，每个中括号中第一个小括号标识band B对应的接收多播业务的特性集，第二个小括号标识band C对应的接收多播业务的特性集。
其中，第一矩阵中的中括号与每个扩展矩阵中的中括号，根据所在的行一一对应，以扩展矩阵1为例，第一矩阵中第一行也就是第一个中括号与扩展矩阵中的第一行即第一个中括号相对应。具有对应关系的中括号可以进行组合，表示终端设备在这个band组合上支持的特性集组合，所述band组合即Band list extend和Band list 1组合得到的band组合。
表2中，中括号包括的小括号、小括号包括的元素以及各元素指示的含义具体可以参阅表1中的相关描述，这里不再重复赘述。
其中，在表2中第一矩阵和扩展矩阵的行数一致。也就是第一矩阵包括的第三参数集合的数量与扩展矩阵包括的第二参数集合的数量相同。
示例2中通过第一矩阵和扩展矩阵组合的方式，可以降低减少能力上报的信令开销，并且对于单播能力部分，可以最大程度的重用现有机制，对协议的改动较小。
示例2中，可以通过能力查询中的一个或多个比特触发终端设备上报接收多播业务的band B和band C的能力组合，或者，也可以通过能力查询中的一个或多个比特触发上报band B接收多播业务的能力(其中，band B可以为同一PLMN的band或者其他PLMN的band),也可以通过能力查询中的MBS的band过滤列表包含bandB和C来触发终端设备上报接收多播业务的bandB和C的能力组合。
示例3，能力信息包括第二频带组合列表以及Q1个第三特性集组合的标识；其中，第二频带组合列表包括支持接收多播业务的N个band的标识，N为大于0的整数；任一第三特性集组合包括Q2个第四参数集合，任一第四参数集合指示N个band分别对应的接收多播业务的能力，和/或，N个band中每个band上CC对应的接收多播业务的能力，Q1为大于0的整数，Q2为大于0的整数。
一种可选的方式中，能力信息中可以列举出Q1个第三特性集组合的标识，或者，能力信息也可以包括扩展信息，该扩展信息可以对应Q1个第三特性集组合的标识。
可选的，能力信息还包括第三频带组合列表以及第四特性集组合的标识，其中，第三 频带组合包括支持接收单播业务的M个band的标识，M为大于0的整数；第四特性集组合包括Q2个第五参数集合，任一第五参数集合指示M个band分别对应的接收单播业务的能力。其中，第四特性集组合中第i个第五参数集合与第i个第三特性集组合中每个第四参数组合相对应，其中，i为大于0且不大于Q2的整数。可以理解的，第四特性集组合中第i个第五参数集合与第i个第三特性集组合中任一个第四参数集合组合，可以表示终端设备在这个band组合上支持的特性集组合，所述band组合即第二频带组合列表和第三频带组合列表组合得到的band组合。
本示例3中，第二频带组合列表列举了终端设备支持接收多播业务的N个band的标识，第三频带组合列表列举了终端设备支持接收单播业务的M个band的标识。这里根据band上支持的通信业务对band进行区分。如果终端设备在一个band上支持接收多播业务，则在第二频带组合列表包括该band的标识，如果终端设备在一个band上支持接收单播业务，则在第三频带组合列表包括该band的标识。如果一个band既支持接收多播业务，也支持接收单播业务，则该band的标识包括在第二频带组合列表和第三频带组合列表中。
作为一种示例，本方式中，能力信息的结构可以为：能力信息包括第二频带组合列表、第三频带组合列表、Q1个第三特性集组合的标识和第四特性集组合的标识。第二频带组合列表包括支持接收多播业务的N个band的标识，第三频带组合列表包括支持接收单播业务的M个band的标识。其中，若一个band支持接收多播业务和单播业务，则该band的标识包括在第二频带组合列表和第三频带组合列表中。
其中，每个第三特性集组合包含多个特性集索引的矩阵型元素，每个特性集索引与N个band中的一个band相关联。其中，每个第三特性集组合的每一行特性集索引可以认为是一个第五参数集合。每个第三特性集组合的每一行特性集索引即每一个第五参数集合包括上述N个band对应的特性集索引。其中，N个band中每个band对应的特性集索引对应一组通信参数，用于表示终端设备在这个band上接收多播业务的能力。
第四特性集组合包含多个特性集索引的矩阵型元素，每个特性集索引与M个band中的一个band相关联。其中，每一行特性集索引可以认为是一个第四参数集合。第四特性集组合的每一行特性集索引即每一个第四参数集合包括上述M个band对应的特性集索引。其中，M个band中每个band对应的特性集索引对应一组通信参数，用于表示终端设备在这个band上接收单播业务的能力，或者，用于表示终端设备在这个band上接收通信业务的能力，该通信业务包括单播业务和多播业务。
第四特性集组合中第i行特性集索引与第i个第三特性集组合中任一行特性集索引组合，可以表示终端设备在这个band组合上支持的特性集组合，所述band组合即第二频带组合列表和第三频带组合列表组合得到的band组合。
关于M个band对应的特性集索引的含义、N个band对应的特性集索引的含义的说明，可以参阅上述示例1中关于M个band对应的特性集索引、N个band对应的特性集索引的说明，这里不再重复赘述。
下面结合具体例子对示例3进行举例说明。
假设终端设备在band A和band B上支持接收单播业务，在band B和band C上支持接收多播业务，能力信息的结构可以如表3a所示。
表3a
Figure PCTCN2022122879-appb-000003
featureSetCombinationID 1对应的特性集组合包括的行数，可以理解为，featureSetCombinationID 1对应的特性集组合包括的参数集合的数量。
featureSetCombination_extend ID 1对应的特性集组合包括的行数，可以理解为，featureSetCombination_extend ID 1对应的特性集组合包括的参数集合的数量。
featureSetCombination_extend ID 2对应的特性集组合包括的行数，可以理解为，featureSetCombination_extend ID 1对应的特性集组合包括的参数集合的数量。
featureSetCombination_extend ID 3对应的特性集组合包括的行数，可以理解为，featureSetCombination_extend ID 1对应的特性集组合包括的参数集合的数量。
结合上述表3a对示例3进行说明，表3a为能力信息中频带组合信息即Band Combination Lists。其中，Band list extend为第二频带组合列表，通过第二频带组合列表可以指示支持接收多播业务的N个band的标识，表3a中以band B和band C支持多播业务为例。Band list 1为第三频带组合列表，通过第二频带组合列表可以指示支持接收单播业务的M个band的标识，表3a中以band A和band B支持单播业务为例。
featureSetCombinationID 1为第四特性集组合的标识，第四特性集组合包括Band list 1对应的Q2个第三参数集合。表3a中以Q2＝3为例，第四特性集组合包括Band list 1对应的Q2＝3个第三参数集合，其中，每个中括号表示一个第三参数集合，同一中括号中各小括号依次标识Band list 1中各band对应的特性集。例如，每个中括号中第一个小括号标识band A对应的特性集，第二个小括号标识band B对应的特性集。
featureSetCombination_extend ID list包括Q1＝3个第三特性集组合的标识。其中，每个第三特性集组合包括Q2个第二参数集合。表3a中以Q1＝3为例，每个第三特性集组合包括Q2＝3个第四参数集合，其中，每个第三特性集组合中每个中括号表示一个第四参数集合，同一中括号中各小括号依次标识Band list extend中各band对应的接收多播业务的特性集。例如，每个中括号中第一个小括号标识band B对应的接收多播业务的特性集，第二个小括号标识band C对应的接收多播业务的特性集。
其中，第四特性集组合中第1个中括号可以与第1个第三特性集组合，即featureSetCombination_extend ID list中索引为1对应的第三特性集组合包括的每一个中括号组合。第四特性集组合中第2个中括号可以与第2个第三特性集组合，即featureSetCombination_extend ID list中索引为2对应的第三特性集组合包括的每一个中括号组合。第四特性集组合中第3个中括号可以与第3个第三特性集组合，即featureSetCombination_extend ID list中索引为3对应的第三特性集组合包括的每一个中括号组合。
以featureSetCombination_extend ID list中索引为1对应的第三特性集组合为例，第四特性集组合中第1个中括号与featureSetCombination_extend ID list中索引为1对应的第三特性集组合中的第1个中括号组合，表示终端设备在这个band组合上支持的一个特性集组合，所述band组合即Band list extend和Band list 1组合得到的band组合。第四特性集组合中第1个中括号与featureSetCombination_extend ID list中索引为1对应的第三特性集组合中的第2个中括号组合，表示终端设备在这个band组合上支持的一个特性集组合，所述band组合即Band list extend和Band list 1组合得到的band组合。以此类推。
表3a中，中括号包括的小括号、小括号包括的元素以及各元素指示的含义具体可以参阅表1中的相关描述，这里不再重复赘述。
作为另一种示例，本方式中，能力信息的结构可以为：能力信息包括第二频带组合列表、第三频带组合列表和第四特性集组合的标识。第二频带组合列表包括支持接收多播业 务的N个band的标识，第三频带组合列表包括支持接收单播业务的M个band的标识。其中，若一个band支持接收多播业务和单播业务，则该band的标识包括在第二频带组合列表和第三频带组合列表中。
第四特性集组合包含多个特性集索引的矩阵型元素，每个特性集索引与M个band中的一个band相关联。其中，每一行特性集索引可以认为是一个第四参数集合。第四特性集组合的每一行特性集索引即每一个第四参数集合包括上述M个band对应的特性集索引。其中，M个band中每个band对应的特性集索引对应一组通信参数，用于表示终端设备在这个band上接收单播业务的能力，或者，用于表示终端设备在这个band上接收通信业务的能力，该通信业务包括单播业务和多播业务。
第四特性集组合还可以指示每行特性集索引对应(或调用)的第三特性集组合。
其中，每个第三特性集组合包含多个特性集索引的矩阵型元素，每个特性集索引与N个band中的一个band相关联。其中，每个第三特性集组合的每一行特性集索引可以认为是一个第五参数集合。每个第三特性集组合的每一行特性集索引即每一个第五参数集合包括上述N个band对应的特性集索引。其中，N个band中每个band对应的特性集索引对应一组通信参数，用于表示终端设备在这个band上接收多播业务的能力。
一行特性集索引与所对应的第三特性集组合中任一行特性集索引组合，可以表示终端设备在这个band组合上支持的特性集组合，所述band组合即第二频带组合列表和第三频带组合列表组合得到的band组合。
关于M个band对应的特性集索引的含义、N个band对应的特性集索引的含义的说明，可以参阅上述示例1中关于M个band对应的特性集索引、N个band对应的特性集索引的说明，这里不再重复赘述。
下面结合具体例子对示例3进行举例说明。
假设终端设备在band A和band B上支持接收单播业务，在band B和band C上支持接收多播业务，能力信息的结构可以如表3b所示。
表3b
Figure PCTCN2022122879-appb-000004
Figure PCTCN2022122879-appb-000005
featureSetCombinationID 1对应的特性集组合包括的行数，可以理解为，featureSetCombinationID 1对应的特性集组合包括的参数集合的数量。
featureSetCombination_extend ID 1对应的特性集组合包括的行数，可以理解为，featureSetCombination_extend ID 1对应的特性集组合包括的参数集合的数量。
featureSetCombination_extend ID 2对应的特性集组合包括的行数，可以理解为，featureSetCombination_extend ID 2对应的特性集组合包括的参数集合的数量。
featureSetCombination_extend ID 3对应的特性集组合包括的行数，可以理解为，featureSetCombination_extend ID 3对应的特性集组合包括的参数集合的数量。
结合上述表3b对示例3进行说明，表3b为能力信息中频带组合信息即Band Combination Lists。其中，Band list extend为第二频带组合列表，通过第二频带组合列表可以指示支持接收多播业务的N个band的标识，表3b中以band B和band C支持多播业务为例。Band list 1为第三频带组合列表，通过第二频带组合列表可以指示支持接收单播业务的M个band的标识，表3b中以band A和band B支持单播业务为例。
featureSetCombinationID 1为第四特性集组合的标识，第四特性集组合包括Band list 1对应的Q2个第三参数集合。表3b中以Q2＝3为例，第四特性集组合包括Band list 1对应的Q2＝3个第三参数集合，其中，每个中括号表示一个第三参数集合，同一中括号中各小括号依次标识Band list 1中各band对应的特性集。例如，每个中括号中第一个小括号标识 band A对应的接收单播业务的能力，第二个小括号标识band B对应的接收单播业务的能力。又例如，每个中括号中第一个小括号标识band A对应的接收通信业务的能力，由于终端设备在bandA上支持接收单播业务，因此，band A对应的接收通信业务的能力可以包括接收单播业务的能力；第二个小括号标识band B对应的接收通信业务的能力，由于终端设备在bandB上支持接收单播业务和多播业务，因此，band B对应的接收通信业务的能力可以包括接收单播业务和接收多播业务的能力。
每个中括号中还包括该中括号对应的第三特性集组合，例如，第一个中括号中包括featureSetCombination_extend ID 1，表示该中括号对应featureSetCombination_extend ID 1对应的第三特性集组合。每个第三特性集组合包括Q2＝3个第四参数集合，其中，每个第三特性集组合中每个中括号表示一个第四参数集合，同一中括号中各小括号依次标识Band list extend中各band对应的特性集。例如，每个中括号中第一个小括号标识band B对应的接收多播业务的能力，第二个小括号标识band C对应的接收多播业务的能力。
其中，第四特性集组合中第1个中括号可以与第1个第三特性集组合，即featureSetCombination_extend ID 1对应的第三特性集组合包括的每一个中括号组合。第四特性集组合中第2个中括号可以与第2个第三特性集组合，即featureSetCombination_extend ID 2对应的第三特性集组合包括的每一个中括号组合。第四特性集组合中第3个中括号可以与第3个第三特性集组合，即featureSetCombination_extend ID 3对应的第三特性集组合包括的每一个中括号组合。
以featureSetCombination_extend ID 1对应的第三特性集组合为例，第四特性集组合中第1个中括号与featureSetCombination_extend ID 1对应的第三特性集组合中的第1个中括号组合，表示终端设备在这个band组合上支持的一个特性集组合，所述band组合即Band list extend和Band list 1组合得到的band组合。第四特性集组合中第1个中括号与featureSetCombination_extend ID 1对应的第三特性集组合中的第2个中括号组合，表示终端设备在这个band组合上支持的一个特性集组合，所述band组合即Band list extend和Band list 1组合得到的band组合。以此类推。
表3b中，中括号包括的小括号、小括号包括的元素以及各元素指示的含义具体可以参阅表1中的相关描述，这里不再重复赘述。
示例3中通过第四特性集组合的标识和第三特性集组合的标识组合的方式，可以降低减少能力上报的信令开销，并且对于单播能力部分，可以最大程度的重用现有机制，对协议的改动较小。
示例4，能力信息包括第四频带组合列表以及第五特性集组合的标识；其中，第四频带组合列表包括终端设备支持的X个band的标识，X为大于0的整数；第五特性集组合包括至少一个第六参数集合，任一第六参数集合指示X个band分别对应的通信参数，其中，X个band包括N个支持接收多播业务的band，N个band中任一band对应的通信参数指示band对应的接收多播业务的能力，和/或，band上CC对应的通信能力，其中，若CC支持接收多播业务，CC对应的通信能力为CC对应的接收多播业务的能力，N为大于0，且不大于X的整数。
本示例4中，第四频带组合列表列举了终端设备支持的X个band的标识，这里不区分是否支持多播，只要终端设备在一个band上支持通信，则在第四频带组合列表包括该band的标识。如果一个band既支持接收多播业务，也支持接收单播业务，则该band的标 识在第四频带组合列表中出现一次。
作为一种示例，本方式中，能力信息的结构可以为：能力信息包括第四频带组合列表和第五特性集组合的标识。第四频带组合列表包括终端设备支持的X个band的标识，其中，若一个band支持接收多播业务和单播业务，则该band的标识在第四频带组合列表中出现一次。第五特性集组合包含多个特性集索引(featuresetID)的矩阵型元素，每个特性集索引与一个band相关联。其中，每一行特性集索引可以认为是一个第六参数集合，每一行特性集索引即每个第六参数集合表示终端设备在这个band组合上支持的特性集组合。第五特性集组合的每一行特性集索引即每一个第六参数集合可以包括上述X个band对应的特性集索引。
其中，X个band中每个band对应的特性集索引对应一组通信参数，用于表示终端设备在这个band上进行通信的能力。可选的，X个band对应的特性集索引可以包括两部分，分别为上行特性集索引和下行特性集索引。其中，上行特性集索引可以对应一组通信参数，其中，该组通信参数可以包括band级别的通信参数，和CC级别的通信参数。该组通信参数中，band级别的通信参数用于指示在band上进行上行发送的能力。CC级别的通信参数用于指示在band上进行上行发送的能力。
下行特性集索引可以对应一组通信参数，其中，该组通信参数可以包括band级别的通信参数，和CC级别的通信参数。该组通信参数中，band级别的通信参数用于指示在band上接收通信业务的能力。CC级别的通信参数用于指示在CC上接收通信业务的能力。
一种示例性说明中，如果终端设备在一个band上不支持上行发送，该band对应的上行特性集索引可以为第一特性集索引，该第一特性集索引表示不支持。
如果终端设备在一个band上支持接收多播业务，该band对应的下行特性集索引对应的通信参数可以指示终端设备在该band上接收多播业务的能力，具体可以包括如下至少一项：band级别的接收多播业务的通信参数，CC级别的接收多播业务的通信参数。
band级别的接收多播业务的通信参数可以包括以下类型的通信参数中至少一项：支持接收多播业务的标记、SCS、BW、MIMO layers、ModulationOrder等。
CC级别的接收多播业务的通信参数可以包括以下类型的通信参数中至少一项：支持接收多播业务的标记、SCS、BW、MIMO layers、ModulationOrder等。
下面结合具体例子对示例4进行举例说明。
假设终端设备在band A和band B上支持接收单播业务，在band B和band C上支持接收多播业务，能力信息的结构可以如表4所示。
表4
Figure PCTCN2022122879-appb-000006
Figure PCTCN2022122879-appb-000007
结合上述表4对示例4进行说明，表4为能力信息中频带组合信息即Band Combination Lists。其中，Band list 1为第四频带组合列表，通过第四频带组合列表可以指示终端设备支持的X个band的标识，应注意，这里在Band list 1中不区分band是否支持多播业务。
featureSetCombinationID 1为第五特性集组合的标识，第五特性集组合包括Band list 1对应的至少一个第六参数集合。其中，每个中括号表示一个第六参数集合，指示终端设备在band组合上支持的一种能力。同一中括号中各小括号依次标识频带组合列表中各band对应的特性集。例如，每个中括号中第一个小括号标识band A对应的特性集，第二个小括号标识band B对应的特性集，第三个小括号标识band C对应的特性集。
每个小括号中包括的元素为特性集索引，其中，fsul表示上行对应的特性集，fsdl表示下行对应的特性集，n1、n2等为索引值，即fsul_n1表示上行对应的特性集为索引值n1对应的通信参数，fsdl_n1表示下行对应的特性集为索引值n1对应的通信参数。每个特性集索引指示的内容对应相同的结构体。
以fsdl_n1为例，如表1所示，fsdl_n1对应：band级别的通信参数，即Per band parameters以及CC级别的通信参数，即Per CC parameters。其中，Per CC parameters具体包括CC对应的特征集标识，如，CC1对应的特征集标识fsdlperCC_n1和CC2对应的特征集标识fsdlperCC_n2。若该band上支持接收多播业务，则Per band parameters中可以包括接收多播业务的通信参数。
CC对应的特征集标识可以指示CC对应的通信参数，例如可以是CC对应的SCS,BW,MIMO layers,ModulationOrder等。若该CC上支持接收多播业务，则CC对应的特征集标识指示的通信参数中可以包括接收多播业务的通信参数。
示例4中通过特性集索引对应的通信参数指示接收多播业务的能力，可以降低减少能力上报的信令开销，并且对于单播能力部分，可以最大程度的重用现有机制，对协议的改动较小。
并且，通过在CC级别的通信参数中携带CC对应的接收多播业务的通信参数，可以实现band内CC级别的精细化能力设计，提升能力上报的精准性，并且对协议的改动较小。
前文介绍了方式一的四种示例，基于上述任一示例，一种示例性说明中，下行特性集索引可以根据支持的通信业务进行划分，例如，第一索引集合用于支持接收多播业务的band。第二索引集合用于不支持接收多播业务的band。一种举例说明中，第一索引集合可以包括第一索引范围的特性集索引，如201～300范围内的特性集索引。第二索引集合可以包括第二索引范围的特性集索引，如101～200范围内的特性集索引。
则X个band中任一band的通信参数的索引，具体可以是下行特性集索引满足：若band支持接收多播业务，band对应的通信参数的索引即下行特性集索引属于第一索引集合；若band不支持接收多播业务，band对应的通信参数的索引即下行特性集索引属于第二索引集合。相应的，接入网设备在接收到终端设备上报的能力信息后，可以根据band的下行特性 集索引所在的集合确定该band上是否支持接收播业务，具体的，若band的下行特性集索引属于第一索引集合，则可以确定该band上支持接收播业务，若band的下行特性集索引属于第二索引集合，则可以确定该band上不支持接收播业务。
一种可能的实现方式中，X个band中任一band对应的通信参数指示该band上CC对应的通信能力，通过如下方式实现：X个band中任一band对应的通信参数包括该band上CC对应的通信能力的索引。
一种示例性说明中，CC对应的通信能力的索引也可以根据支持的通信业务进行划分，例如，第三索引集合用于支持接收多播业务的CC。第四索引集合用于不支持接收多播业务的CC。一种举例说明中，第三索引集合可以包括第三范围的索引。第四索引集合可以包括第四范围的索引。
则X个band中任一band的任一CC对应的通信能力的索引满足：若CC支持接收多播业务，CC对应的通信参数的索引属于第三索引集合；若CC不支持接收多播业务，CC对应的通信参数的索引属于第四索引集合。相应的，接入网设备在接收到终端设备上报的能力信息后，可以根据CC对应的索引所在的集合确定该CC上是否支持接收播业务，具体的，若CC的索引属于第三索引集合，则可以确定该CC上支持接收播业务，若CC的索引属于第四索引集合，则可以确定该CC上不支持接收播业务。
方式二，根据前文术语介绍3)可知，能力信息包括频带信息，即Band Lists。在本方式中，可以通过在Band Lists中列举支持接收多播业务的band，并band对应的通信参数中指示在支持接收多播业务的band上接收多播业务的能力，例如，可以在band对应的通信参数包括：支持接收多播业务的标记、接收多播业务的调制阶数、接收多播业务的SCS、BW等。示例性的，能力信息可以如表5所示。
表5
Figure PCTCN2022122879-appb-000008
结合上述表5对方式二进行说明，表5为能力信息中频带信息，即Band List。Band List可以包括终端设备支持的X的band，以及各个band对应的通信参数，其中，如果band上支持接收多播业务，在该band对应的通信参数中包括支持接收多播业务的标记、接收多播业务的调制阶数、接收多播业务的SCS、BW等。
通过方式二，可以指示band级别的接收多播业务的能力，并且对协议改动较小。
需要说明的是，上述方式一和方式二可以单独实施，也可以结合起来作为一个方案实施，例如，可以通过方式二指示支持接收多播业务的band，还可以指示该band上接收多播业务的一部分通信参数，通过方式一中任一示例指示该band上接收多播业务的另一部分通信参数。例如，若band A支持接收多播业务，可以在Band List中bandA对应的通信参数包括：支持接收多播业务的标记，还可以包括band A上接收多播业务的调制阶数。并通过featureSetCombination指示band A上接收多播业务的其他通信参数，例如，band A上接收多播业务的SCS、BW等，再例如，band A上CC级别的接收多播业务的其他通信参数。其中通过featureSetCombination指示band A上接收多播业务的其他通信参数的方式具体可 以参阅上述示例1～示例4，这里不再重复赘述。
以上介绍了能力信息指示band对应的接收多播业务的能力，和/或，CC对应的接收多播业务的能力的方式。
可选的，除了band对应的接收多播业务的能力，和/或，CC对应的接收多播业务的能力以外，能力信息还可以指示至少一个band对应的多播调制信息，其中，多播调制信息为接收多播业务时支持的最高调制阶数。一种实现方式中，可以在Band List中band对应的通信参数中指示该band对应的多播调制信息。
一种示例性说明中，若band上接收多播业务时支持的最高调制阶数为终端设备均支持的调制阶数，或者为终端设备必选的调制阶数，则可以不在能力信息中上报该band上接收多播业务时支持的最高调制阶数。
根据前文可知，能力信息中可以包括band级别的多播调制信息，例如，在Band List中band对应的通信参数中包括该band对应的多播调制信息。能力信息中还可以包括CC级别的多播调制信息，例如，在Feature Sets Combination指示的CC级别的通信参数中包括CC级别的多播调制信息。如图9所示，其中，图9所示“多播调制阶数”表示接收多播业务时支持的最高调制阶数。
一种示例性说明中，CC级别的多播调制信息并不实际约束该CC上使用的最大阶数，接入网设备可以根据CC级别的多播调制信息确定终端设备在该CC上接收多播业务的峰值速率。在这个峰值速率约束下，终端设备可以使用高于这个调制阶数的调制阶数如调制阶数1，应理解的，使用该调制阶数1的前提是对应的band支持该调制阶数1。例如，终端设备支持CC1上的调制阶数为64正交幅度调制(quadrature amplitude modulation，QAM)。CC1对应的band支持的调制阶数为256QAM。则终端设备可以在CC1上使用256QAM，只要调度256QAM的峰值块长小于或等于64QAM的峰值块长。
目前能力信息是基于载波聚合(dual connectivity，CA)组合的结构设计的，现有的CA中有如下要求：
When CA is deployed frame timing and SFN are aligned across cells that can be aggregated(同步CA),or an offset in multiples of slots between the PCell/PSCell and an SCell is configured to the UE(异步CA)。
终端设备只有在小区都是帧对齐(异步CA最多允许小区间偏差不超过半个帧)的情况下才能使用CA技术。对于终端设备同时接收单播业务和多播业务的场景来说，单播业务和多播业务可能是从不同的接入网设备接收的，更甚至两个接入网设备很可能不是一个PLMN/运营商的。因此对于接入网设备来说，接入网设备之间无法判断是不是帧对齐的，因此接入网设备调度多播业务和/或单播业务时可能超出终端设备的能力范围。
一种可能的实施方案中，终端设备发送的能力信息(可以是上文中对多播增强后的能力信息也可以现有技术的单播能力)还可以指示不同的能力组合下是否支持同步(也就是帧对齐)或不同步(也就是帧不对齐)情况下同时接收单播业务和多播业务。
需要说明的是，终端设备指示不同的能力组合下是否支持同步(也就是帧对齐)或不同步(也就是帧不对齐)情况下同时接收单播业务和多播业务的相关方案可以在不依赖于图8所述方法单独实施。
上述方式通过引入新的指示信息来指示不同的能力组合下是否支持同步(也就是帧对齐)或不同步(也就是帧不对齐)情况下同时接收单播业务和多播业务，使得接入网设备 可以更合理的提供单播业务。
另一种可能的实施方案中，可以复用终端设备指示是否支持异步CA或者异步DC的能力，若终端设备支持异步CA，则可以认为终端设备支持同时接收单播业务和多播业务。
再一种可能的实施方案中，终端设备可以在上报单播能力时，可以上报多播业务当前可用的能力组合。可选的，还可以上报回退(fall back)的能力。其中回退的能力是已有的单播能力的减弱，比如band A支持100M，band B支持50M，回退能力可以为band A支持80M，band B支持50M等减弱的能力。具体的能力信息可以如下表6所示。
表6
Figure PCTCN2022122879-appb-000009
基于上报的这些能力组合，当终端设备开始接收多播业务时，可以由终端设备选择可以使用的能力组合并发送给网络设备。比如终端设备当前在band A上接收单播业务，当终端设备在开始接收多播业务之后(这里不限制接收多播业务的band)，终端设备可以向网络设备发送接收多播业务后还可以继续使用的能力组合，比如第一行和/或第二行和/或第三行。具体的，终端设备上报能够使用的能力组合时可以通过MII流程或者通过用户辅助信息(user assistantance information，UAI)流程。
下面介绍终端设备上报能够使用的能力组合的两种方法。
方法A，终端设备上报的能力信息中携带各个能力组合的标识(或者索引)，比如表3b中featureSetCombinationID 1对应的特性集组合包括4行(也就是4个能力组合)，标识分别为1，2，3，4。
当终端设备开始接收多播业务时可以选择支持同时接收当前的单播业务和多播业务的能力组合的标识进行上报，具体的，可以上报1个标识，也可以上报所有满足要求的标识。
或者，当终端设备上报在接收多播业务时也可以选择单播业务最大的能力组合的标识。由于终端设备上报的能力信息中可能没有能同时支持单播业务和多播业务的能力组合，该方式中通过上报支持的单播业务的最大能力，使得接入网设备可以给终端设备调整单播业务占用的资源。
方法B，终端设备可以上报能力组合的band组合和featureSetCombinationID和 featureSet ID，也就是，再次将能力信息通过索引的方式上报给接入网设备。同样的，终端设备上报的能够使用的能力组合可以是支持同时接收单播业务和多播业务的能力组合，也可以是在满足多播业务的情况下单播业务支持的最大能力。
基于上述方法A或方法B，接入网设备可以收到终端设备上报的指示信息后在终端设备指示的能力组合内提供单播业务。
本申请实施例中通过在能力信息中上报band级别的接收多播业务的能力或者CC级别的接收多播业务的能力，可以实现多播能力的精准上报，使得接入网设备可以根据精细化的能力信息提供多播业务，或终端设备更精确的提供单播业务。
并且，通过上报支持的接收多播业务的最高调制阶数，以及正在接收或者期望接收的多播业务的调制阶数，可以提升多播业务、单播业务的通信效率。
目前MII(可以是上文中涉及的增强的MII，也可以是现有MII，也可以是未来通信发展中出现的MII)可以在接入网设备间进行交互，接入网设备间通过节点间RRC消息(Inter-node RRC message)进行交互，用于将终端设备感兴趣的业务发送给相邻的接入网设备。MII中可以包含终端设备感兴趣的或者正在接收的TMGI，TMGI包括PLMN信息，TMGI的具体形式如下：
Figure PCTCN2022122879-appb-000010
可以看出其中PLMN信息可以有两种形式，一种为PLMN的索引值(plmn-Index)，一种为PLMN具体的值(explicitValue)。对于PLMN索引值来说，终端设备上报的索引值为SIB1中的PLMN标识信息列表(plmn-IdentityInfoList)或者非公共网络(non-public network，NPN)标识信息列表(npn-IdentityInfoList)中PLMN索引值或者独立的非公共网络(stand-alone non-public network，SNPN)索引值。
plmn-IdentityInfoList中包含多个PLMN-IdentityInfo，其中包含多个PLMN索引值和小区ID。具体的，第n个小区的第i个PLMN的PLMN索引值可以通过公式b1+b2+…+b(n-1)+i计算得到的，其中，b(n-1)为第n-1个小区包括的PLMN的数量。通过该方式可以得到每个PLMN对应的PLMN索引值。
其中，终端设备收到的TMGI中的PLMN信息可以是PLMN索引值，也可以是PLMN值。
若终端设备上报的MII中的TMGI是通过PLMN索引值上报的，接入网设备间在交互MII消息是通常是直接把终端设备转发给其他接入网设备，而其他接入网设备无法确定PLMN索引值对应的PLMN，导致TMGI中的PLMN索引值无法解读，其他接入网设备不能正确的识别TMGI。
针对上述问题，一种可能的解决方案为，源接入网设备可以向其他接入网设备发送对应关系，所述对应关系为一个或多个PLMN索引值与一个或多个PLMN值之间的一一对应的关系。从而，源接入网设备接收来自终端设备的指示信息后，所述指示信息指示终端设备正在接收或期望接收多播业务的信息(例如上述MII)。若指示信息包括至少一个PLMN索引值。源接入网设备可以向其他接入网设备发送所述指示信息。其他接入网设备 可以根据该对应关系和指示信息包括的PLMN索引值确定对应的PLMN。
需要说明的是，该解决方案可以不依赖于图8所述方法单独实施。
下面介绍对应关系的四种实现方式。
实现方式一:源接入网设备向其他接入网设备发送SIB1中的PLMN标识信息，所述PLMN标识信息指示所述对应关系，例如，该PLMN标识信息可以包括一个或多个PLMN值，该一个或多个PLMN值的顺序指示所述对应关系。
例如，源接入网设备被将PLMN-IdentityInfo发送给其他接入网设备。相比于LTE中，接入网设备之间交互SIB1，该方法只需交互需要的信息，SIB1中其他不需要的信息不过多的交互，信令开销小。
实现方式二：当前Xn协议中Xn接口建立(Xn Setup)流程和NG-RAN节点配置更新(NG-RAN node Configuration Update)流程中会转发小区的相关信息，包括每个小区的广播信息的PLMN列表，其中包含每个小区(CGI)对应的在SIB中广播的PLMN列表，也就是PLMN-IdentityInfo中的plmn-IdentityList。
基于此，源接入网设备可以在小区的相关信息中指示PLMN索引值和PLMN具体的值的对应关系。例如，可以在小区的相关信息中携带PLMN具体的值对应的PLMN索引值。
例如，所述第一接入网设备向所述第二接入网设备发送Xn接口建立消息或者NG-RAN节点配置更新消息，所述Xn接口建立消息或者NG-RAN节点配置更新消息包括至少一个小区的信息，所述至少一个小区中第一小区的信息中指示所述第一小区的至少一个PLMN以及每个PLMN对应的PLMN索引值。
或者，源接入网设备可以使小区的相关信息中的PLMN的顺序与SIB1中该小区的PLMN的顺序一致，具体可以是协议规定或者由接入网设备实现。并且，将PLMN索引值的偏置转发给其他接入网设备，具体的，偏置可以是在该小区之前各个小区的PLMN总数，例如，第n个小区的相关信息中可以包括第1个小区至第n-1个小区的PLMN总数b1+b2+…+b(n-1)。
例如，所述第一接入网设备向所述第二接入网设备发送Xn接口建立消息或者NG-RAN节点配置更新消息，所述Xn接口建立消息或者NG-RAN节点配置更新消息包括至少一个小区的信息，所述至少一个小区中第n个小区的信息中指示所述第n个小区的至少一个PLMN以及偏置，所述偏置为所述至少一个小区中第一个小区至第n-1个小区的PLMN总数，所述n为大于0的整数。
需要说明的是，本申请不限定对应关系和指示信息的先后顺序，可以先发送对应关系再发送指示信息，也可以是先发送指示信息再发送对应关系，或者，也可以同时发送对应关系和指示信息，例如通过一个消息(或者信令)发送该对应关系和指示信息。
针对上述问题，另一种可能的解决方案为，终端设备接收来自接入网设备的业务信息，该业务信息包括第一TMGI，其中，第一TMGI中包括第一PLMN索引值。终端设备在确定第一PLMN索引值对应的PLMN值后，向该接入网设备发送MII，所述MII包括第二TMGI，所述第二TMGI包括所述第一PLMN索引值对应的PLMN值。其中，第一TMGI和第二TMGI中的service ID相同。其中，该接入网设备可以是为终端设备提供多播业务的接入网设备。
一种可能的实现方式中，第二TMGI为终端设备接收到的应用层消息(如服务通知 (service announcement)消息)携带的TMGI。
另一种可能的实现方式中，第二TMG为终端设备根据第一TMGI以及第一PLMN索引值对应的PLMN值生成的。例如，终端设备可以将第一TMGI中的第一PLMN索引值替换成第一PLMN索引值对应的PLMN值，然后生成第二TMGI。
可选的，该接入网设备在接收到终端设备上报的MII后可以转发给其他接入网设备。
针对上述问题，另一种可能的解决方案为，源接入网设备接收来自终端设备的第一指示信息，所述第一指示信息指示终端设备正在接收或期望接收多播业务的信息，所述第一指示信息包括至少一个PLMN索引值；源接入网设备向其他接入网设备发送第二指示信息，所述第二指示信息中的PLMN信息为所述至少一个PLMN索引值对应的PLMN值。
可选的，所述第二指示信息为将所述第一指示信息中的所述至少一个PLMN索引值替换成所述至少一个PLMN索引值对应的PLMN值得到的。
示例性的，所述第一指示信息指示终端设备正在接收或期望接收多播业务的如下至少一项信息：频率信息、TMGI、SCS、或调制阶数。
例如，源接入网设备在收到终端设备上报的MII后，若该MII中包括的是PLMN索引值，则将PLMN索引值对应的PLMN具体的值发送给其他接入网设备，比如，在将PLMN具体的值重新编码后发送给其他接入网设备。
目前，终端设备上报MII时，会上报多播频点列表、多播业务优先级、TMGI列表等。如果在终端设备在安全激活之前上报MII，会导致传输多播业务的详细信息不安全，从而带来安全隐患。但是若在安全激活之后上报MII，接入网设备在终端设备安全激活之后为终端设备分配单播业务的资源，例如initial BWP，在接收到终端设备上报的MII之后，将根据MII重新配置initial BWP，例如，将initial BWP的带宽配置为CFR的带宽，这将带来较大的信令开销，并且使得多播业务的中断时延较长。基于此，本申请实施例还提供一种通信方法，用于在保证通信安全的前提下，降低信令开销，提升多播业务的连续性。如图10所示，该方法具体包括：
S1001，终端设备确定第一信息和第二信息。
其中，第一信息指示终端设备对多播业务感兴趣，第二信息指示终端设备感兴趣的多播业务。
可选的，S1001可以是一个可选的步骤。
S1002，终端设备发送第一信息。相应的，接入网设备接收第一信息。
示例性的，第一信息可以包括如下至少一项：感兴趣的频率列表、多播业务的优先级、或者广播CFR。即终端设备可以通过如下至少一项隐式指示终端设备对多播业务感兴趣：感兴趣的频率列表、多播业务的优先级、或者广播CFR。
或者，终端设备也可以通过其他方式指示第一信息，例如，通过1比特显示指示第一信息，等等。
一种实现方式中，感兴趣的频率列表、多播业务的优先级、或者广播CFR也可以在安全激活之后发送，例如和第二信息一起发送。在该实现方式中，终端设备可以通过其他方式发送第一信息，例如，通过一个比特显示指示终端设备对多播业务感兴趣。
具体的第一信息可以通过RRC建立完成(RRCSetupComplete)消息或RRC建立请求(RRCSetupRequest)消息或其他消息进行发送。
S1003，接入网设备基于第一信息为终端设备配置频域资源，例如，为终端设备配置 initial BWP，其中，该initial BWP的带宽等于CFR的带宽。
S1004，终端设备发送第二信息。相应的，接入网设备接收第二信息。
其中，第二信息指示终端设备感兴趣的多播业务。
示例性的，第二信息可以包括多播业务标识或者多播服务标识或互联网协议(internet protocol，IP)组地址。举例说明，多播业务标识或者多播服务标识可以为TMGI。
第二信息可以通过终端设备协助信息(UEAssistanceInformation)，安全模式完成(SecurityModeComplete)消息，或其他消息等进行发送。
可选的，S1005，终端设备可以在配置的频域资源上接收感兴趣的多播业务，例如，可以在配置的initial BWP上接收感兴趣的多播业务。
其中，第一信息在安全激活之前发送，第二信息在安全激活之后发送。S1003可以在安全激活之前执行，也可以在安全激活之后执行，这里不做具体限定。
作为一种示例，安全激活过程可以包括：接入网设备向终端设备发送安全模式命令，其中，该安全模式命令携带密钥。之后，终端设备向接入网设备发送安全模式完成。基于该示例，一种具体的实现方式中，第一信息可以在接收到来自接入网设备的安全模式命令之前或者在发送安全模式完成之前发送，第二信息可以在发送安全模式完成之后发送。
一种可能的实现方式中，终端设备可以在满足如下条件中至少一项的情况下采用在安全激活之前发送第一信息，在安全激活之后发送第二信息的方式：
终端设备接入的小区/接入网设备正在提供多播业务；
终端设备接入的小区/接入网设备将要提供多播业务；
终端设备接入的小区/接入网设备支持提供多播业务；
终端设备在当前接入的小区/接入网设备正在接收或者期望接收多播业务；
终端设备正在接收或者期望接收的多播业务为当前接入的小区/接入网设备正在/将要/支持提供的；
终端设备当前接入的小区广播了用于提供多播业务信息的SIB；
终端设备当前接入的小区广播了第一SIB，该第一SIB携带多播控制配置信息(MCCH)；
终端设备当前接入的小区提供的多播业务的CFR的带宽不同于系统消息配置的initial BWP的带宽；
终端设备当前接入的小区提供的多播业务的CFR的带宽大于系统消息配置的initial BWP的带宽；或，
终端设备接收来自接入网设备的第三信息，该第三信息指示终端设备采用在安全激活之前发送第一信息，在安全激活之后发送第二信息的方式。可选地，第三信息承载于广播消息中。
本申请实施例中通过在安全激活之前向接入网设备指示终端设备对多播业务感兴趣，使得接入网设备可以为终端设备配置用于多播业务的资源，例如CFR，从而不需要在配置用于单播业务的资源后根据多播业务再重新配置，例如不需要在配置initial BWP后再根据多播业务将initial BWP的带宽配置为CFR的带宽。通过该方式可以降低信令开销，有助于保证多播业务的连续性。并且，将终端设备感兴趣的多播业务的相关信息在安全激活之后发送，可以避免在不安全的环境中传输MBS的具体信息，从而可以提升通信安全性。
需要说明的是，图7所述方法与图10所述方法可以分别作为一个独立的方案实施，也可以结合起来作为一个方案实施。例如，图7所述方法中，终端设备向接入网设备发送 MII时可以通过图10所述方法发送，即在安全激活之前发送第一信息，具体可以是通过感兴趣的频率列表、多播业务的优先级、或者广播CFR等信息隐式指示，也可以通过1比特显示指示，并在安全激活之后发送第二信息。
一种具体的实现方式中，在通过1比特显示指示第一信息的实施方式中，感兴趣的频率列表、多播业务的优先级、广播CFR、或者正在接收或者期望接收的多播业务的调制阶数等信息可以在安全激活之前发送，例如和第一信息一起发送，也可以在安全激活之后发送，例如和第二信息一起发送。或者，感兴趣的频率列表、多播业务的优先级、广播CFR、或者正在接收或者期望接收的多播业务的调制阶数等信息，也可以一部分信息在安全激活之前发送，另一部分信息在安全激活之后。
基于与方法实施例的同一发明构思，本申请实施例提供一种通信装置，该通信装置的结构可以如图11所示，包括通信模块1101和处理模块1102。
在一种实施方式中，通信装置具体可以用于实现图7的实施例中终端设备执行的方法，该装置可以是终端设备本身，也可以是终端设备中的芯片或芯片组或芯片中用于执行相关方法功能的一部分。其中，处理模块1102，用于确定能力信息，能力信息指示频带对应的接收多播业务的能力，和/或，分量载波CC对应的接收多播业务的能力；通信模块1101，用于向接入网设备发送能力信息。
可选的，通信模块1101，还用于：向接入网设备发送指示信息，指示信息指示终端设备正在接收多播业务的调制阶数。
可选的，通信模块1101，还用于：在处理模块1102确定能力信息之前，接收来自接入网设备的能力上报指示信息，能力上报指示信息指示终端设备上报接收多播业务的能力。
示例性的，能力信息包括第一频带组合列表以及第一特性集组合的标识；其中，第一频带组合列表包括第一频带信息，第一频带信息包括支持接收多播业务的N个频带的标识，N为大于0的整数；第一特性集组合包括第一频带组合列表对应的至少一个第一参数集合，任一第一参数集合指示N个频带分别对应的接收多播业务的能力，和/或，N个频带中每个频带上CC对应的接收多播业务的能力。
可选的，第一频带组合列表还包括第二频带信息，第二频带信息包括支持单播业务的M个频带的标识，M为大于0的整数；任一第一参数集合还指示M个频带分别对应的接收单播业务的能力，或者，任一第一参数集合还指示M个频带分别对应的接收通信业务的能力，通信业务包括单播业务和多播业务。
示例性的，能力信息包括第二频带组合列表以及第二特性集组合的标识；其中，第二频带组合列表包括支持接收多播业务的N个频带的标识，N为大于0的整数；第二特性集组合包括第二频带组合列表对应的Q1组参数，其中，每组参数包括Q2个第二参数集合，任一第二参数集合指示N个频带分别对应的接收多播业务的能力，和/或，N个频带中每个频带上CC对应的接收多播业务的能力，Q1为大于0的整数，Q2为大于0的整数。
可选的，能力信息还包括第三频带组合列表，其中，第三频带组合列表包括支持接收单播业务的M个频带的标识，M为大于0的整数；第二特性集组合还包括第三频带组合列表对应的Q2个第三参数集合，任一第三参数集合指示M个频带分别对应的接收单播业务的能力；其中，Q2个第二参数集合中第i个第二参数集合与Q1组参数中任一组参数中的第i个第一参数集合相对应，其中，i为大于0且不大于Q2的整数。
示例性的，能力信息包括第二频带组合列表以及Q1个第三特性集组合的标识；其中， 第二频带组合列表包括支持接收多播业务的N个频带的标识，N为大于0的整数；任一第三特性集组合包括Q2个第四参数集合，任一第四参数集合指示N个频带分别对应的接收多播业务的能力，和/或，N个频带中每个频带上CC对应的接收多播业务的能力，Q1为大于0的整数，Q2为大于0的整数。
可选的，能力信息还包括第三频带组合列表以及第四特性集组合的标识，其中，第三频带组合包括支持接收单播业务的M个频带的标识，M为大于0的整数；第四特性集组合包括Q2个第五参数集合，任一第五参数集合指示M个频带分别对应的接收单播业务的能力。
示例性的，能力信息包括第四频带组合列表以及第五特性集组合的标识；其中，第四频带组合列表包括终端设备支持的X个频带的标识，X为大于0的整数；第五特性集组合包括至少一个第六参数集合，任一第六参数集合指示X个频带分别对应的通信参数，其中，X个频带包括N个支持接收多播业务的频带，N个频带中任一频带对应的通信参数指示频带对应的接收多播业务的能力，和/或，频带上CC对应的通信能力，其中，若CC支持接收多播业务，CC对应的通信能力为CC对应的接收多播业务的能力，N为大于0，且不大于X的整数。
可选的，任一第六参数集合指示X个频带分别对应的通信参数，包括：任一第六参数集合包括X个频带分别对应的通信参数的索引，X个频带中任一频带的通信参数的索引满足：若频带支持接收多播业务，频带对应的通信参数的索引属于第一索引集合；若频带不支持接收多播业务，频带对应的通信参数的索引属于第二索引集合。
可选的，N个频带中任一频带对应的通信参数指示频带上CC对应的通信能力，包括：N个频带中任一频带对应的通信参数包括频带上CC对应的通信能力的索引，频带上任一CC对应的通信能力的索引满足：若CC支持接收多播业务，CC对应的通信能力的索引属于第三索引集合；若CC不支持接收多播业务，CC对应的通信能力的索引属于第四索引集合。
举例说明中，频带对应的接收多播业务的能力包括如下至少一项：频带支持接收多播业务、或在频带上接收多播业务的通信参数。
举例说明中，CC对应的接收多播业务的能力包括：CC支持接收多播业务，和/或，在CC上接收多播业务的通信信息；其中，通信信息为在CC上接收多播业务的通信参数，或者，通信信息为CC的能力值，能力值为根据CC上接收多播业务的通信参数确定的。
此外，接收多播业务的通信参数包括接收多播业务时支持的最高调制阶数。
在一种实施方式中，通信装置具体可以用于实现图7的实施例中接入网设备执行的方法，该装置可以是接入网设备本身，也可以是接入网设备中的芯片或芯片组或芯片中用于执行相关方法功能的一部分。其中，通信模块1101，用于接收来自终端设备的能力信息，能力信息指示频带对应的接收多播业务的能力，和/或，分量载波CC对应的接收多播业务的能力；处理模块1102，用于根据能力信息确定终端设备的能力。
可选的，通信模块1101，还用于：接收来自终端设备的指示信息，指示信息包括终端设备正在接收多播业务的调制阶数。
可选的，通信模块1101，还用于：在接收来自终端设备的能力信息之前，向终端设备发送能力上报指示信息，能力上报指示信息指示终端设备上报接收多播业务的能力。
示例性的，能力信息包括第一频带组合列表以及第一特性集组合的标识；其中，第一 频带组合列表包括第一频带信息，第一频带信息包括支持接收多播业务的N个频带的标识，N为大于0的整数；第一特性集组合包括第一频带组合列表对应的至少一个第一参数集合，任一第一参数集合指示N个频带分别对应的接收多播业务的能力，和/或，N个频带中每个频带上CC对应的接收多播业务的能力。
可选的，第一频带组合列表还包括第二频带信息，第二频带信息包括支持单播业务的M个频带的标识，M为大于0的整数；任一第一参数集合还指示M个频带分别对应的接收单播业务的能力，或者，任一第一参数集合还指示M个频带分别对应的接收通信业务的能力，通信业务包括单播业务和多播业务。
示例性的，能力信息包括第二频带组合列表以及第二特性集组合的标识；其中，第二频带组合列表包括支持接收多播业务的N个频带的标识，N为大于0的整数；第二特性集组合包括第二频带组合列表对应的Q1组参数，其中，每组参数包括Q2个第二参数集合，任一第二参数集合指示N个频带分别对应的接收多播业务的能力，和/或，N个频带中每个频带上CC对应的接收多播业务的能力，Q1为大于0的整数，Q2为大于0的整数。
可选的，能力信息还包括第三频带组合列表，其中，第三频带组合列表包括支持接收单播业务的M个频带的标识，M为大于0的整数；第二特性集组合还包括第三频带组合列表对应的Q2个第三参数集合，任一第三参数集合指示M个频带分别对应的接收单播业务的能力；其中，Q2个第二参数集合中第i个第二参数集合与Q1组参数中任一组参数中的第i个第一参数集合相对应，其中，i为大于0且不大于Q2的整数。
示例性的，能力信息包括第二频带组合列表以及Q1个第三特性集组合的标识；其中，第二频带组合列表包括支持接收多播业务的N个频带的标识，N为大于0的整数；任一第三特性集组合包括Q2个第四参数集合，任一第四参数集合指示N个频带分别对应的接收多播业务的能力，和/或，N个频带中每个频带上CC对应的接收多播业务的能力，Q1为大于0的整数，Q2为大于0的整数。
可选的，能力信息还包括第三频带组合列表以及第四特性集组合的标识，其中，第三频带组合包括支持接收单播业务的M个频带的标识，M为大于0的整数；第四特性集组合包括Q2个第五参数集合，任一第五参数集合指示M个频带分别对应的接收单播业务的能力。
示例性的，能力信息包括第四频带组合列表以及第五特性集组合的标识；其中，第四频带组合列表包括终端设备支持的X个频带的标识，X为大于0的整数；第五特性集组合包括至少一个第六参数集合，任一第六参数集合指示X个频带分别对应的通信参数，其中，X个频带包括N个支持接收多播业务的频带，N个频带中任一频带对应的通信参数指示频带对应的接收多播业务的能力，和/或，频带上CC对应的通信能力，其中，若CC支持接收多播业务，CC对应的通信能力为CC对应的接收多播业务的能力，N为大于0，且不大于X的整数。
可选的，任一第六参数集合指示X个频带分别对应的通信参数，包括：任一第六参数集合包括X个频带分别对应的通信参数的索引，X个频带中任一频带的通信参数的索引满足：若频带支持接收多播业务，频带对应的通信参数的索引属于第一索引集合；若频带不支持接收多播业务，频带对应的通信参数的索引属于第二索引集合。
可选的，N个频带中任一频带对应的通信参数指示频带上CC对应的通信能力，包括：N个频带中任一频带对应的通信参数包括频带上CC对应的通信能力的索引，频带上任一 CC对应的通信能力的索引满足：若CC支持接收多播业务，CC对应的通信能力的索引属于第三索引集合；若CC不支持接收多播业务，CC对应的通信能力的索引属于第四索引集合。
举例说明中，频带对应的接收多播业务的能力包括如下至少一项：频带支持接收多播业务、或在频带上接收多播业务的通信参数。
举例说明中，CC对应的接收多播业务的能力包括：CC支持接收多播业务，和/或，在CC上接收多播业务的通信信息；其中，通信信息为在CC上接收多播业务的通信参数，或者，通信信息为CC的能力值，能力值为根据CC上接收多播业务的通信参数确定的。
此外，接收多播业务的通信参数包括接收多播业务时支持的最高调制阶数。
本申请实施例中对模块的划分是示意性的，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，另外，在本申请各个实施例中的各功能模块可以集成在一个处理器中，也可以是单独物理存在，也可以两个或两个以上模块集成在一个模块中。上述集成的模块既可以采用硬件的形式实现，也可以采用软件功能模块的形式实现。可以理解的是，本申请实施例中各个模块的功能或者实现可以进一步参考方法实施例的相关描述。
一种可能的方式中，通信装置可以如图12所示，该装置可以是通信设备或者通信设备中的芯片，其中该通信设备可以为上述实施例中的终端设备也可以是上述实施例中的网络设备。该装置包括处理器1201和通信接口1202，还可以包括存储器1203。其中，处理模块1102可以为处理器1201。通信模块1101可以为通信接口1202。
处理器1201，可以是一个CPU，或者为数字处理单元等等。通信接口1202可以是收发器、也可以为接口电路如收发电路等、也可以为收发芯片等等。该装置还包括：存储器1203，用于存储处理器1201执行的程序。存储器1203可以是非易失性存储器，比如硬盘(hard disk drive，HDD)或固态硬盘(solid-state drive，SSD)等，还可以是易失性存储器(volatile memory)，例如随机存取存储器(random-access memory，RAM)。存储器1203是能够用于携带或存储具有指令或数据结构形式的期望的程序代码并能够由计算机存取的任何其它介质，但不限于此。
处理器1201用于执行存储器1203存储的程序代码，具体用于执行上述处理模块1102的动作，本申请在此不再赘述。通信接口1202具体用于执行上述通信模块1101的动作，本申请在此不再赘述。
本申请实施例中不限定上述通信接口1202、处理器1201以及存储器1203之间的具体连接介质。本申请实施例在图12中以存储器1203、处理器1201以及通信接口1202之间通过总线1204连接，总线在图12中以粗线表示，其它部件之间的连接方式，仅是进行示意性说明，并不引以为限。总线可以分为地址总线、数据总线、控制总线等。为便于表示，图12中仅用一条粗线表示，但并不表示仅有一根总线或一种类型的总线。
本发明实施例还提供了一种计算机可读存储介质，用于存储为执行上述处理器所需执行的计算机软件指令，其包含用于执行上述处理器所需执行的程序。
本申请实施例还提供一种通信系统，包括用于实现图7的实施例中终端设备功能的通信装置和用于实现图7的实施例中网络设备功能的通信装置。
本申请实施例还提供一种通信系统，包括用于实现图10的实施例中终端设备功能的通信装置和用于实现图10的实施例中网络设备功能的通信装置。
本领域内的技术人员应明白，本申请的实施例可提供为方法、系统、或计算机程序产 品。因此，本申请可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且，本申请可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器、CD-ROM、光学存储器等)上实施的计算机程序产品的形式。
本申请是参照根据本申请的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上，使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
显然，本领域的技术人员可以对本申请进行各种改动和变型而不脱离本申请的精神和范围。这样，倘若本申请的这些修改和变型属于本申请权利要求及其等同技术的范围之内，则本申请也意图包含这些改动和变型在内。

Claims (71)

  1. 一种通信方法，其特征在于，所述方法包括：
    确定能力信息，所述能力信息指示频带对应的接收多播业务的能力，和/或，分量载波CC对应的接收多播业务的能力；
    向接入网设备发送所述能力信息。
  2. 如权利要求1所述的方法，其特征在于，在所述确定能力信息之前，所述方法还包括：
    接收来自所述接入网设备的能力上报指示信息，所述能力上报指示信息指示所述终端设备上报接收多播业务的能力。
  3. 如权利要求1或2所述的方法，其特征在于，所述方法还包括：
    向所述接入网设备发送指示信息，所述指示信息指示终端设备正在接收或者期望接收多播业务的调制阶数。
  4. 如权利要求3所述的方法，其特征在于，在向所述接入网设备发送指示信息之前，所述方法还包括：
    接收来自所述接入网设备的第四信息，其中，所述第四信息用于指示上报异公用陆地移动网PLMN或者异运营商或者跨基站或者非服务小区或异频接收的多播业务的信息。
  5. 如权利要求3或4所述的方法，其特征在于，在向所述接入网设备发送指示信息之前，所述方法还包括：
    在满足如下任一情况时确定需要上报所述指示信息：
    接收的多播业务的临时移动组标识TMGI中的PLMN与所述接入网设备的服务小区的系统消息块1SIB1中包含的PLMN不一致；
    接收多播业务的小区的SIB1中包含的PLMN和所述接入网设备的服务小区的SIB1中包含的PLMN不一致。
  6. 如权利要求4所述的方法，其特征在于，所述第四信息包括一个或多个PLMN信息，在向所述接入网设备发送指示信息之前，所述方法还包括：
    在满足如下任一情况时确定需要上报所述指示信息：
    接收的多播业务的TMGI中的PLMN与所述一个或多个PLMN均不相同；
    接收多播业务的小区的SIB1中包含的PLMN与所述一个或多个PLMN均不相同。
  7. 如权利要求3-6任一项所述的方法，其特征在于，在向所述接入网设备发送指示信息之前，所述方法还包括：
    在满足如下情况中一项或多项时确定需要上报所述指示信息：
    接收多播业务的频点不属于所述接入网设备的服务小区的系统消息块21中包含的频点；
    接收多播业务的频点与用户服务描述中包括的频点列表中的频点均不相同。
  8. 如权利要求4或6所述的方法，其特征在于，所述第四信息包括一个或多个频点信息，在向所述接入网设备发送指示信息之前，所述方法还包括：
    在满足如下情况时确定需要上报所述指示信息：接收的多播业务的频点与所述一个或多个频点均不相同。
  9. 如权利要求3所述的方法，其特征在于，在向所述接入网设备发送指示信息之前， 所述方法还包括：接收来自所述接入网设备的SIB 21。
  10. 如权利要求3-9任一项所述的方法，其特征在于，所述指示信息还指示所述终端设备正在接收或期望接收多播业务的如下至少一项信息：频率信息、TMGI、子载波间隔SCS。
  11. 一种通信方法，其特征在于，所述方法包括：
    接收来自终端设备的能力信息，所述能力信息指示频带对应的接收多播业务的能力，和/或，分量载波CC对应的接收多播业务的能力；
    根据所述能力信息确定所述终端设备的能力。
  12. 如权利要求11所述的方法，其特征在于，在所述接收来自终端设备的能力信息之前，所述方法还包括：
    向所述终端设备发送能力上报指示信息，所述能力上报指示信息指示所述终端设备上报接收多播业务的能力。
  13. 如权利要求11或12所述的方法，其特征在于，所述方法还包括：
    接收来自所述终端设备的指示信息，所述指示信息包括终端设备正在接收或期望接收多播业务的调制阶数。
  14. 如权利要求13所述的方法，其特征在于，在接收来自所述终端设备的指示信息之前，所述方法还包括：
    向所述终端设备发送第四信息，其中，所述第四信息用于指示上报异公用陆地移动网PLMN或者异运营商或者跨基站或者非服务小区或异频接收的多播业务。
  15. 如权利要求13所述的方法，其特征在于，在接收来自所述终端设备的指示信息之前，所述方法还包括：
    向所述终端设备发送系统消息块21。
  16. 如权利要求1-15任一项所述的方法，其特征在于，所述能力信息包括第一频带组合列表以及第一特性集组合的标识；
    其中，所述第一频带组合列表包括第一频带信息，所述第一频带信息包括支持接收多播业务的N个频带的标识，所述N为大于0的整数；所述第一特性集组合包括所述第一频带组合列表对应的至少一个第一参数集合，任一所述第一参数集合指示所述N个频带分别对应的接收多播业务的能力，和/或，所述N个频带中每个频带上CC对应的接收多播业务的能力。
  17. 如权利要求16所述的方法，其特征在于，
    所述第一频带组合列表还包括第二频带信息，所述第二频带信息包括支持单播业务的M个频带的标识，所述M为大于0的整数；
    任一所述第一参数集合还指示所述M个频带分别对应的接收单播业务的能力，或者，任一所述第一参数集合还指示所述M个频带分别对应的接收通信业务的能力，所述通信业务包括单播业务和多播业务。
  18. 如权利要求1-15任一项所述的方法，其特征在于，所述能力信息包括第二频带组合列表以及第二特性集组合的标识；
    其中，所述第二频带组合列表包括支持接收多播业务的N个频带的标识，所述N为大于0的整数；所述第二特性集组合包括所述第二频带组合列表对应的Q1组参数，其中，每组参数包括Q2个第二参数集合，任一所述第二参数集合指示所述N个频带分别对应的接收多播业务的能力，和/或，所述N个频带中每个频带上CC对应的接收多播业务的能力， 所述Q1为大于0的整数，所述Q2为大于0的整数。
  19. 如权利要求18所述的方法，其特征在于，
    所述能力信息还包括第三频带组合列表，其中，所述第三频带组合列表包括支持接收单播业务的M个频带的标识，所述M为大于0的整数；
    所述第二特性集组合还包括所述第三频带组合列表对应的Q2个第三参数集合，任一所述第三参数集合指示所述M个频带分别对应的接收单播业务的能力；
    其中，所述Q2个第二参数集合中第i个第二参数集合与所述Q1组参数中任一组参数中的第i个第一参数集合相对应，其中，i为大于0且不大于Q2的整数。
  20. 如权利要求1-15任一项所述的方法，其特征在于，
    所述能力信息包括第二频带组合列表以及Q1个第三特性集组合的标识；
    其中，所述第二频带组合列表包括支持接收多播业务的N个频带的标识，所述N为大于0的整数；
    任一所述第三特性集组合包括Q2个第四参数集合，任一所述第四参数集合指示所述N个频带分别对应的接收多播业务的能力，和/或，所述N个频带中每个频带上CC对应的接收多播业务的能力，所述Q1为大于0的整数，所述Q2为大于0的整数。
  21. 如权利要求20所述的方法，其特征在于，
    所述能力信息还包括第三频带组合列表以及第四特性集组合的标识，其中，所述第三频带组合包括支持接收单播业务的M个频带的标识，所述M为大于0的整数；
    所述第四特性集组合包括Q2个第五参数集合，任一所述第五参数集合指示所述M个频带分别对应的接收单播业务的能力。
  22. 如权利要求1-15任一项所述的方法，其特征在于，
    所述能力信息包括第四频带组合列表以及第五特性集组合的标识；
    其中，所述第四频带组合列表包括终端设备支持的X个频带的标识，所述X为大于0的整数；
    所述第五特性集组合包括至少一个第六参数集合，任一所述第六参数集合指示所述X个频带分别对应的通信参数，其中，所述X个频带包括N个支持接收多播业务的频带，所述N个频带中任一频带对应的通信参数指示所述频带对应的接收多播业务的能力，和/或，所述频带上CC对应的通信能力，其中，若所述CC支持接收多播业务，所述CC对应的通信能力为所述CC对应的接收多播业务的能力，所述N为大于0，且不大于X的整数。
  23. 如权利要求22所述的方法，其特征在于，任一所述第六参数集合指示所述X个频带分别对应的通信参数，包括：
    任一所述第六参数集合包括所述X个频带分别对应的通信参数的索引，所述X个频带中任一频带的通信参数的索引满足：
    若所述频带支持接收多播业务，所述频带对应的通信参数的索引属于第一索引集合；
    若所述频带不支持接收多播业务，所述频带对应的通信参数的索引属于第二索引集合。
  24. 如权利要求22或23所述的方法，其特征在于，所述N个频带中任一频带对应的通信参数指示所述频带上CC对应的通信能力，包括：
    所述N个频带中任一频带对应的通信参数包括所述频带上CC对应的通信能力的索引，所述频带上任一CC对应的通信能力的索引满足：
    若所述CC支持接收多播业务，所述CC对应的通信能力的索引属于第三索引集合；
    若所述CC不支持接收多播业务，所述CC对应的通信能力的索引属于第四索引集合。
  25. 如权利要求1-24任一项所述的方法，其特征在于，所述频带对应的接收多播业务的能力包括如下至少一项：所述频带支持接收多播业务、或在所述频带上接收多播业务的通信参数。
  26. 如权利要求1-25任一项所述的方法，其特征在于，所述CC对应的接收多播业务的能力包括：所述CC支持接收多播业务，和/或，在所述CC上接收多播业务的通信信息；
    其中，所述通信信息为在所述CC上接收多播业务的通信参数，或者，所述通信信息为所述CC的能力值，所述能力值为根据所述CC上接收多播业务的通信参数确定的。
  27. 如权利要求25或26所述的方法，其特征在于，所述接收多播业务的通信参数包括接收多播业务时支持的最高调制阶数。
  28. 如权利要求27所述的方法，其特征在于，所述接收多播业务的通信参数还包括：是否支持在同步的情况下同时接收单播业务和多播业务，和/或，是否支持在不同步的情况下同时接收单播业务和多播业务。
  29. 一种通信方法，其特征在于，所述方法包括：
    第一接入网设备向第二接入网设备指示对应关系，所述对应关系为一个或多个公用陆地移动网PLMN索引值与一个或多个PLMN值之间的一一对应的关系；
    所述第一接入网设备接收来自终端设备的指示信息，所述指示信息指示终端设备正在接收或期望接收多播业务的信息，所述指示信息包括至少一个PLMN索引值，所述至少一个PLMN索引值属于所述一个或多个PLMN索引值；
    所述第一接入网向所述第二接入网设备发送所述指示信息。
  30. 一种通信方法，其特征在于，所述方法包括：
    第二接入网设备从第一接入网设备获取对应关系，所述对应关系为一个或多个公用陆地移动网PLMN索引值与一个或多个PLMN值之间的一一对应的关系；
    所述第二接入网设备接收来自所述第一接入网设备的指示信息，所述指示信息指示终端设备正在接收或期望接收多播业务的信息，所述指示信息包括至少一个PLMN索引值；
    所述第二接入网根据所述对应关系确定所述至少一个PLMN索引值对应的PLMN值。
  31. 一种通信方法，其特征在于，所述方法包括：
    第一接入网设备接收来自终端设备的第一指示信息，所述第一指示信息指示终端设备正在接收或期望接收多播业务的信息，所述第一指示信息包括至少一个公用陆地移动网PLMN索引值；
    所述第一接入网设备向第二接入网设备发送第二指示信息，所述第二指示信息中的PLMN信息为所述至少一个PLMN索引值对应的PLMN值。
  32. 一种通信方法，其特征在于，所述方法包括：
    终端设备接收来自接入网设备的业务信息，所述业务信息包括第一临时移动组标识TMGI，所述第一TMGI中包括第一公用陆地移动网PLMN索引值；
    所述终端设备向接入网设备发送指示信息，所述指示信息指示终端设备正在接收或期望接收多播业务的信息，所述指示信息包括第二TMGI，所述第二TMGI包括所述第一PLMN索引值对应的PLMN值，其中，所述第一TMGI和所述第二TMGI中的服务标识相同。
  33. 一种通信装置，其特征在于，所述装置包括：
    处理模块，用于确定能力信息，所述能力信息指示频带对应的接收多播业务的能力，和/或，分量载波CC对应的接收多播业务的能力；
    通信模块，用于向接入网设备发送所述能力信息。
  34. 如权利要求33所述的装置，其特征在于，所述通信模块，还用于：
    在所述处理模块确定能力信息之前，接收来自所述接入网设备的能力上报指示信息，所述能力上报指示信息指示所述终端设备上报接收多播业务的能力。
  35. 如权利要求33或34所述的装置，其特征在于，所述通信模块，还用于：
    向所述接入网设备发送指示信息，所述指示信息指示终端设备正在接收或期望接收多播业务的调制阶数。
  36. 如权利要求35所述的装置，其特征在于，在向所述接入网设备发送指示信息之前，所述装置还包括：
    接收来自所述接入网设备的第四信息，其中，所述第四信息用于指示上报异公用陆地移动网PLMN或者异运营商或者跨基站或者非服务小区或异频接收的多播业务的信息。
  37. 如权利要求35或36所述的装置，其特征在于，在向所述接入网设备发送指示信息之前，所述装置还包括：
    在满足如下任一情况时确定需要上报所述指示信息：
    接收的多播业务的临时移动组标识TMGI中的PLMN与所述接入网设备的服务小区的系统消息块1SIB1中包含的PLMN不一致；
    接收多播业务的小区的SIB1中包含的PLMN和所述接入网设备的服务小区的SIB1中包含的PLMN不一致。
  38. 如权利要求36所述的装置，其特征在于，所述第四信息包括一个或多个PLMN信息，在向所述接入网设备发送指示信息之前，所述装置还包括：
    在满足如下任一情况时确定需要上报所述指示信息：
    接收的多播业务的TMGI中的PLMN与所述一个或多个PLMN均不相同；
    接收多播业务的小区的SIB1中包含的PLMN与所述一个或多个PLMN均不相同。
  39. 如权利要求35-37任一项所述的装置，其特征在于，在向所述接入网设备发送指示信息之前，所述装置还包括：
    在满足如下情况中一项或多项时确定需要上报所述指示信息：
    接收多播业务的频点不属于所述接入网设备的服务小区的系统消息块21中包含的频点；
    接收多播业务的频点与用户服务描述中包括的频点列表中的频点均不相同。
  40. 如权利要求36或37所述的装置，其特征在于，所述第四信息包括一个或多个频点信息，在向所述接入网设备发送指示信息之前，所述装置还包括：
    在满足如下情况时确定需要上报所述指示信息：接收的多播业务的频点与所述一个或多个频点均不相同。
  41. 如权利要求35所述的装置，其特征在于，在向所述接入网设备发送指示信息之前，所述装置还包括：接收来自所述接入网设备的SIB 21。
  42. 如权利要求35-41任一项所述的装置，其特征在于，所述指示信息还指示所述终端设备正在接收或期望接收多播业务的如下至少一项信息：频率信息、TMGI、子载波间隔SCS。
  43. 一种通信装置，其特征在于，所述装置包括：
    通信模块，用于接收来自终端设备的能力信息，所述能力信息指示频带对应的接收多播业务的能力，和/或，分量载波CC对应的接收多播业务的能力；
    处理模块，用于根据所述能力信息确定所述终端设备的能力。
  44. 如权利要求43所述的装置，其特征在于，所述通信模块，还用于：
    在所述接收来自终端设备的能力信息之前，向所述终端设备发送能力上报指示信息，所述能力上报指示信息指示所述终端设备上报接收多播业务的能力。
  45. 如权利要求43或44所述的装置，其特征在于，所述通信模块，还用于：
    接收来自所述终端设备的指示信息，所述指示信息包括终端设备正在接收或期望接收多播业务的调制阶数。
  46. 如权利要求45所述的装置，其特征在于，在接收来自所述终端设备的指示信息之前，所述装置还包括：
    向所述终端设备发送第四信息，其中，所述第四信息用于指示上报异公用陆地移动网PLMN或者异运营商或者跨基站或者非服务小区或异频接收的多播业务。
  47. 如权利要求45所述的装置，其特征在于，在接收来自所述终端设备的指示信息之前，所述装置还包括：
    向所述终端设备发送系统消息块21。
  48. 如权利要求33-47任一项所述的装置，其特征在于，所述能力信息包括第一频带组合列表以及第一特性集组合的标识；
    其中，所述第一频带组合列表包括第一频带信息，所述第一频带信息包括支持接收多播业务的N个频带的标识，所述N为大于0的整数；所述第一特性集组合包括所述第一频带组合列表对应的至少一个第一参数集合，任一所述第一参数集合指示所述N个频带分别对应的接收多播业务的能力，和/或，所述N个频带中每个频带上CC对应的接收多播业务的能力。
  49. 如权利要求48所述的装置，其特征在于，
    所述第一频带组合列表还包括第二频带信息，所述第二频带信息包括支持单播业务的M个频带的标识，所述M为大于0的整数；
    任一所述第一参数集合还指示所述M个频带分别对应的接收单播业务的能力，或者，任一所述第一参数集合还指示所述M个频带分别对应的接收通信业务的能力，所述通信业务包括单播业务和多播业务。
  50. 如权利要求33-47任一项所述的装置，其特征在于，所述能力信息包括第二频带组合列表以及第二特性集组合的标识；
    其中，所述第二频带组合列表包括支持接收多播业务的N个频带的标识，所述N为大于0的整数；所述第二特性集组合包括所述第二频带组合列表对应的Q1组参数，其中，每组参数包括Q2个第二参数集合，任一所述第二参数集合指示所述N个频带分别对应的接收多播业务的能力，和/或，所述N个频带中每个频带上CC对应的接收多播业务的能力，所述Q1为大于0的整数，所述Q2为大于0的整数。
  51. 如权利要求50所述的装置，其特征在于，
    所述能力信息还包括第三频带组合列表，其中，所述第三频带组合列表包括支持接收单播业务的M个频带的标识，所述M为大于0的整数；
    所述第二特性集组合还包括所述第三频带组合列表对应的Q2个第三参数集合，任一所述第三参数集合指示所述M个频带分别对应的接收单播业务的能力；
    其中，所述Q2个第二参数集合中第i个第二参数集合与所述Q1组参数中任一组参数中的第i个第一参数集合相对应，其中，i为大于0且不大于Q2的整数。
  52. 如权利要求33-47任一项所述的装置，其特征在于，
    所述能力信息包括第二频带组合列表以及Q1个第三特性集组合的标识；
    其中，所述第二频带组合列表包括支持接收多播业务的N个频带的标识，所述N为大于0的整数；
    任一所述第三特性集组合包括Q2个第四参数集合，任一所述第四参数集合指示所述N个频带分别对应的接收多播业务的能力，和/或，所述N个频带中每个频带上CC对应的接收多播业务的能力，所述Q1为大于0的整数，所述Q2为大于0的整数。
  53. 如权利要求52所述的装置，其特征在于，
    所述能力信息还包括第三频带组合列表以及第四特性集组合的标识，其中，所述第三频带组合包括支持接收单播业务的M个频带的标识，所述M为大于0的整数；
    所述第四特性集组合包括Q2个第五参数集合，任一所述第五参数集合指示所述M个频带分别对应的接收单播业务的能力。
  54. 如权利要求33-47任一项所述的装置，其特征在于，
    所述能力信息包括第四频带组合列表以及第五特性集组合的标识；
    其中，所述第四频带组合列表包括终端设备支持的X个频带的标识，所述X为大于0的整数；
    所述第五特性集组合包括至少一个第六参数集合，任一所述第六参数集合指示所述X个频带分别对应的通信参数，其中，所述X个频带包括N个支持接收多播业务的频带，所述N个频带中任一频带对应的通信参数指示所述频带对应的接收多播业务的能力，和/或，所述频带上CC对应的通信能力，其中，若所述CC支持接收多播业务，所述CC对应的通信能力为所述CC对应的接收多播业务的能力，所述N为大于0，且不大于X的整数。
  55. 如权利要求54所述的装置，其特征在于，任一所述第六参数集合指示所述X个频带分别对应的通信参数，包括：
    任一所述第六参数集合包括所述X个频带分别对应的通信参数的索引，所述X个频带中任一频带的通信参数的索引满足：
    若所述频带支持接收多播业务，所述频带对应的通信参数的索引属于第一索引集合；
    若所述频带不支持接收多播业务，所述频带对应的通信参数的索引属于第二索引集合。
  56. 如权利要求54或55所述的装置，其特征在于，所述N个频带中任一频带对应的通信参数指示所述频带上CC对应的通信能力，包括：
    所述N个频带中任一频带对应的通信参数包括所述频带上CC对应的通信能力的索引，所述频带上任一CC对应的通信能力的索引满足：
    若所述CC支持接收多播业务，所述CC对应的通信能力的索引属于第三索引集合；
    若所述CC不支持接收多播业务，所述CC对应的通信能力的索引属于第四索引集合。
  57. 如权利要求33-56任一项所述的装置，其特征在于，所述频带对应的接收多播业务的能力包括如下至少一项：所述频带支持接收多播业务、或在所述频带上接收多播业务的通信参数。
  58. 如权利要求33-57任一项所述的装置，其特征在于，所述CC对应的接收多播业务的能力包括：所述CC支持接收多播业务，和/或，在所述CC上接收多播业务的通信信息；
    其中，所述通信信息为在所述CC上接收多播业务的通信参数，或者，所述通信信息为所述CC的能力值，所述能力值为根据所述CC上接收多播业务的通信参数确定的。
  59. 如权利要求33-58任一项所述的装置，其特征在于，所述接收多播业务的通信参数包括接收多播业务时支持的最高调制阶数。
  60. 如权利要求59所述的装置，其特征在于，所述接收多播业务的通信参数还包括：是否支持在同步的情况下同时接收单播业务和多播业务，和/或，是否支持在不同步的情况下同时接收单播业务和多播业务。
  61. 一种通信装置，其特征在于，所述装置包括：
    通信模块，用于与第二接入网设备进行通信；
    处理模块，用于：
    通过所述通信模块向第二接入网设备指示对应关系，所述对应关系为一个或多个公用陆地移动网PLMN索引值与一个或多个PLMN值之间的一一对应的关系；
    以及，通过所述通信模块接收来自终端设备的指示信息，所述指示信息指示终端设备正在接收或期望接收多播业务的信息，所述指示信息包括至少一个PLMN索引值，所述至少一个PLMN索引值属于所述一个或多个PLMN索引值；
    通过所述通信模块向所述第二接入网设备发送所述指示信息。
  62. 一种通信装置，其特征在于，所述装置包括：
    通信模块，用于从第一接入网设备获取对应关系，所述对应关系为一个或多个公用陆地移动网PLMN索引值与一个或多个PLMN值之间的一一对应的关系；
    以及，接收来自所述第一接入网设备的指示信息，所述指示信息指示终端设备正在接收或期望接收多播业务的信息，所述指示信息包括至少一个PLMN索引值；
    处理模块，用于根据所述对应关系确定所述至少一个PLMN索引值对应的PLMN值。
  63. 一种通信装置，其特征在于，所述装置包括：
    通信模块，用于与第二接入网设备进行通信；
    处理模块，用于：
    通过所述通信模块接收来自终端设备的第一指示信息，所述第一指示信息指示终端设备正在接收或期望接收多播业务的信息，所述第一指示信息包括至少一个公用陆地移动网PLMN索引值；
    通过所述通信模块向第二接入网设备发送第二指示信息，所述第二指示信息中的PLMN信息为所述至少一个PLMN索引值对应的PLMN值。
  64. 一种通信装置，其特征在于，所述装置包括：
    通信模块，用于与接入网设备进行通信；
    处理模块，用于：
    通过所述通信模块接收来自接入网设备的业务信息，所述业务信息包括第一临时移动组标识TMGI，所述第一TMGI中包括第一公用陆地移动网PLMN索引值；
    通过所述通信模块向接入网设备发送指示信息，所述指示信息指示终端设备正在接收或期望接收多播业务的信息，所述指示信息包括第二TMGI，所述第二TMGI包括所述第一PLMN索引值对应的PLMN值，其中，所述第一TMGI和所述第二TMGI中的服务标 识相同。
  65. 一种通信装置，其特征在于，所述装置包括处理器和存储器，所述处理器与所述存储器耦合；
    所述存储器，用于存储程序或指令；
    所述处理器，用于调用所述程序或指令使所述通信装置执行如权利要求1-10或16-28中任一项所述的方法。
  66. 一种通信装置，其特征在于，所述装置包括处理器和存储器，所述处理器与所述存储器耦合；
    所述存储器，用于存储程序或指令；
    所述处理器，用于调用所述程序或指令使所述通信装置执行如权利要求11-28中任一项所述的方法。
  67. 一种通信装置，其特征在于，所述装置包括处理器和存储器，所述处理器与所述存储器耦合；
    所述存储器，用于存储程序或指令；
    所述处理器，用于调用所述程序或指令使所述通信装置执行如权利要求29所述的方法。
  68. 一种通信装置，其特征在于，所述装置包括处理器和存储器，所述处理器与所述存储器耦合；
    所述存储器，用于存储程序或指令；
    所述处理器，用于调用所述程序或指令使所述通信装置执行如权利要求30所述的方法。
  69. 一种通信装置，其特征在于，所述装置包括处理器和存储器，所述处理器与所述存储器耦合；
    所述存储器，用于存储程序或指令；
    所述处理器，用于调用所述程序或指令使所述通信装置执行如权利要求31所述的方法。
  70. 一种通信装置，其特征在于，所述装置包括处理器和存储器，所述处理器与所述存储器耦合；
    所述存储器，用于存储程序或指令；
    所述处理器，用于调用所述程序或指令使所述通信装置执行如权利要求32所述的方法。
  71. 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用于存储计算机指令，当所述计算机指令在计算机上运行时，使得所述计算机执行如权利要求1～32中任意一项所述的方法。
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