WO2021203881A1 - 一种通信方法及相关设备 - Google Patents

一种通信方法及相关设备 Download PDF

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Publication number
WO2021203881A1
WO2021203881A1 PCT/CN2021/079112 CN2021079112W WO2021203881A1 WO 2021203881 A1 WO2021203881 A1 WO 2021203881A1 CN 2021079112 W CN2021079112 W CN 2021079112W WO 2021203881 A1 WO2021203881 A1 WO 2021203881A1
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WIPO (PCT)
Prior art keywords
multicast service
network device
terminal device
information
indication information
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PCT/CN2021/079112
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English (en)
French (fr)
Inventor
许斌
李秉肇
于海凤
王燕
曹振臻
陈磊
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华为技术有限公司
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Publication of WO2021203881A1 publication Critical patent/WO2021203881A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal

Definitions

  • This application relates to the field of communication technology, and in particular to a communication method and related equipment.
  • the multimedia broadcast multicast service comes from the data server.
  • the data server sends the MBMS service data to the core network device, and then the core network device uses the protocol data unit session (PDU session) or service
  • the quality of service (QoS) flow sends the MBMS service data to the base station, and finally the base station sends the MBMS service data to at least one terminal device that receives the MBMS service.
  • the MBMS service can be sent to multiple terminal equipments in a connected state in the form of unicast through a dedicated radio bearer established with the terminal equipment, or it can be established by establishing a public transmission for the MBMS service.
  • the channel is sent in the form of multicast to multiple terminal devices in a connected state, an idle state, or an inactive state.
  • the network side cannot know the status of these terminal devices, and therefore cannot make accurate and appropriate decisions for the MBMS service.
  • the embodiments of the present application disclose a communication method and related equipment, which can count the number of terminal devices that are receiving or are interested in receiving multicast services in real time, and maintain the transmission of multicast services.
  • the first aspect of the embodiments of the present application discloses a communication method.
  • the method is suitable for a communication device.
  • the communication device is, for example, a terminal device, and includes:
  • the terminal device when the terminal device starts or stops receiving the multicast service, it needs to report the first network device, that is, send the first indication information to the first network device; when the terminal device moves, the terminal device also needs to report the first network device.
  • a network device sends first indication information to the first network device.
  • the first network device can determine the receiving status of the terminal device in a timely manner, and make real-time statistics on the status of the multicast service in a certain cell based on the receiving status.
  • the number of terminal devices that are interested in receiving or are receiving multicast services can avoid incorrect statistics due to cell reselection, so that the transmission of multicast services can be maintained more accurately.
  • the receiving state includes: starting to receive the first multicast service, receiving the first multicast service, stopping receiving the first multicast service, and about to receive the first multicast service. At least one of a multicast service, a desire to receive the first multicast service, an interest in the reception of the first multicast service, and an uninteresting in the reception of the first multicast service.
  • the terminal device when the terminal device is in any of the foregoing receiving states, it needs to report to the first network device, which is beneficial for the first network device to determine the receiving state of the terminal device in time.
  • the first indication information further includes identification information of the terminal device.
  • receiving scheduling information from the first network device where the scheduling information is used to indicate the time-frequency resource of the first indication information, and the scheduling information is carried in system information, wireless Resource control RRC signaling, random access message or downlink control information DCI.
  • the first network device configures the time-frequency resource location for sending the first indication information for the terminal device, which is conducive to rational use of the time-frequency resource and avoids waste.
  • the method further includes: starting a timer; determining that the timer expires; and sending all the information to the first network device.
  • the first instruction information after the sending the first indication information to the first network device, the method further includes: starting a timer; determining that the timer expires; and sending all the information to the first network device. The first instruction information.
  • the timer mechanism is to prevent the terminal device from reporting errors when the network device does not know the receiving status of the terminal device and cannot accurately count the number of terminal devices. Therefore, with this mechanism, when the timer of the network device expires If it does not receive the report from the terminal device, it can be considered that the terminal device is no longer interested in the multicast service. In addition, with this mechanism, when the terminal device is no longer interested in the multicast service, it does not need to report again. It only needs to wait for the timer to expire without reporting, and the network device can know.
  • the method further includes: after performing cell reselection or changing a serving cell, sending the second indication information to the first network device, where the second indication information includes the first Identification information and identification information of the first multicast service, where the first identification information includes identification information of the source network device and/or identification information of the terminal device.
  • the terminal device when the terminal device moves, the terminal device sends the second instruction information to the first network device. Accordingly, the first network device addresses the source network device according to the instruction information, and informs the source network device of the multicast service The terminal device that is interested in receiving the departure, so that the source network device updates the number of terminal devices that are interested in receiving the first multicast service or the number of first multicast services in a certain area.
  • the second aspect of the embodiments of the present application discloses a communication method, the method is suitable for a communication device, the communication device is, for example, a terminal device, and includes:
  • the first indication information includes first identification information and identification information of the first multicast service
  • the first identification information includes identification information of the source network device and/or identification information of the terminal device.
  • the terminal device when the terminal device moves, the terminal device needs to report to the first network device, that is, send the first indication information to the first network device. In this way, the first network device can determine the reception of the terminal device in time. Status, real-time statistics of the number of terminal devices that are interested in or are receiving multicast services in a certain cell, to avoid incorrect statistics due to cell reselection, so as to more accurately maintain the transmission of multicast services .
  • the third aspect of the embodiments of the present application discloses a communication method.
  • the method is suitable for a communication device.
  • the communication device is, for example, a first network device, and includes:
  • Receive first indication information from a terminal device where the first indication information is used to indicate the reception status of the terminal device for a first multicast service, and the first indication information includes identification information of the first multicast service ;
  • the terminal device when the terminal device starts or stops receiving the multicast service, it needs to report the first network device, that is, send the first indication information to the first network device; when the terminal device moves, the terminal device also needs to report the first network device.
  • a network device sends first indication information to the first network device.
  • the first network device can determine the receiving status of the terminal device in a timely manner, and make real-time statistics on the status of the multicast service in a certain cell based on the receiving status.
  • the number of terminal devices that are interested in receiving or are receiving multicast services can avoid incorrect statistics due to cell reselection, so that the transmission of multicast services can be maintained more accurately.
  • the receiving state includes: starting to receive the first multicast service, receiving the first multicast service, stopping receiving the first multicast service, and about to receive the first multicast service. At least one of a multicast service, a desire to receive the first multicast service, an interest in the reception of the first multicast service, and an uninteresting in the reception of the first multicast service.
  • the terminal device when the terminal device is in any of the foregoing receiving states, it needs to report to the first network device, which is beneficial for the first network device to determine the receiving state of the terminal device in time.
  • the first indication information further includes identification information of the terminal device.
  • the method further includes: sending scheduling information to the terminal device, where the scheduling information is used to indicate the time-frequency resource of the first indication information, and the scheduling information is carried in the system Information, radio resource control RRC signaling, random access message or downlink control information DCI.
  • the first network device configures the time-frequency resource location for sending the first indication information for the terminal device, which is conducive to rational use of the time-frequency resource and avoids waste.
  • the second network device is determined according to second indication information from the terminal device, where the second indication information includes the identification information of the first multicast service and the first identification information,
  • the first identification information includes identification information of the second network device and/or identification information of the terminal device.
  • the method further includes: sending third indication information to the second network device, where the third indication information is used to instruct the terminal device to leave, and the third indication information Including the identification information of the first multicast service and/or the identification information of the terminal device.
  • the method further includes: receiving a handover request message from the second network device, where the handover request message includes fourth indication information, and the fourth indication information includes the first 1. Identification information of the multicast service.
  • the first network device can know the identification information of the multicast service that the terminal device is interested in by receiving the identification information of the first multicast service in the handover request message from the second network device, and thereby update the identification information of the first multicast service.
  • the method further includes: sending fifth indication information to a core network device, where the fifth indication information includes identification information of the first multicast service and an identification of the terminal device Information and second identification information, where the second identification information includes at least one of a tracking area identification TAI, a cell global identification CGI, and a public land mobile network identification PLMN ID.
  • the first network device sends fifth instruction information to the core network device.
  • the fifth instruction information is for the core network device to address the second network device and inform the second network device that the second network device is interested in or is currently receiving multicast services.
  • the terminal device that receives the multicast service leaves, so that the second network device updates the number of terminal devices that are interested in receiving the first multicast service or the number of the first multicast service in a certain area.
  • the method further includes: receiving a first message from a terminal device, where the first message includes the fifth indication information.
  • the fourth aspect of the embodiments of the present application discloses a communication method.
  • the method is suitable for a communication device.
  • the communication device is, for example, a first core network device or an application server, and includes:
  • Receive first indication information from a terminal device where the first indication information is used to indicate the reception status of the terminal device for a first multicast service, and the first indication information includes identification information of the first multicast service .
  • the terminal device when the terminal device starts or stops receiving the multicast service, it needs to report the first core network device or the application server via the first network device, that is, send the first indication information to the first core network device or the application server; When the terminal device moves, the terminal device also needs to report the first core network device or application server via the first network device, that is, send the first instruction information to the first core network device or application server that reports via the first network device, through this In this way, the first core network device or application server can determine the receiving status of the terminal device in time, and count in real time the number of terminal devices that are interested in receiving multicast services or are receiving multicast services in a certain cell. Reselection and wrong statistics, so as to more accurately maintain the transmission of multicast services.
  • the receiving state includes: starting to receive the first multicast service, receiving the first multicast service, stopping receiving the first multicast service, and about to receive the first multicast service. At least one of a multicast service, a desire to receive the first multicast service, an interest in the reception of the first multicast service, and an uninteresting in the reception of the first multicast service.
  • the terminal device when the terminal device is in any of the above receiving states, it needs to report to the first core network device or application server via the first network device, which is beneficial to the first core network device or application server to count the number of terminal devices in real time .
  • the first indication information further includes: identification information of the terminal device and second identification information, and the second identification information includes a tracking area identification TAI, a cell global identification CGI, and public At least one item of the land mobile network identity PLMN ID.
  • the method further includes: receiving second indication information from the first network device, where the second indication information is used to indicate the arrival of the terminal device, and the second indication The information includes at least one of the identification information of the first multicast service, the identification information of the terminal device, the identification information of the source network device, and the identification information of the first network device.
  • the first core network device or the application server receives the second indication information of the first network device, and knows the arrival of the terminal device according to the indication information, thereby updating the number of terminal devices interested in receiving the multicast service.
  • the method further includes: sending request information to a second core network device, where the request information is used to request context information of the terminal device; and receiving information from the second core network device Context information, the context information includes identification information of the first multicast service.
  • the first core network device sends request information to the second core network device to request the context information of the terminal device.
  • the first core network device can know the terminal device according to the identification information of the first multicast service in the context information.
  • the identification information of the multicast service that the device is interested in and then update the number of terminal devices that are interested in receiving the multicast service.
  • the method further includes: determining the number of terminal devices that receive the first multicast service according to the receiving state of the terminal device.
  • the method further includes: determining the transmission strategy of the first multicast service according to the number of the terminal devices.
  • the core network device or the application server determines different transmission strategies of the first multicast service according to the number of different terminal devices, so as to perform transmission more flexibly.
  • the method further includes: sending a first message to the first network device, where the first message includes the number of the terminal devices.
  • the fifth aspect of the embodiments of the present application discloses a communication method, the method is suitable for a communication device, the communication device is, for example, a terminal device, and includes:
  • the terminal device when the terminal device starts or stops receiving the multicast service, it needs to report the first core network device or the application server via the first network device, that is, send the first indication information to the first core network device or the application server;
  • the terminal device also needs to report the first core network device or application server via the first network device, that is, send the first instruction information to the first core network device or application server that reports via the first network device, through this
  • the first core network device or the application server can report the reception status of the terminal device via the first network device in time, and make real-time statistics on the terminal devices in a certain cell that are interested in receiving multicast services or are receiving multicast services. To avoid incorrect statistics due to cell reselection, so as to more accurately maintain the transmission of multicast services.
  • the receiving state includes: starting to receive the first multicast service, receiving the first multicast service, stopping receiving the first multicast service, and about to receive the first multicast service. At least one of a multicast service, a desire to receive the first multicast service, an interest in the reception of the first multicast service, and an uninteresting in the reception of the first multicast service.
  • the terminal device when the terminal device is in any of the above receiving states, it needs to report to the first core network device or application server via the first network device, which is beneficial to the first core network device or application server to count the number of terminal devices in real time .
  • the first indication information further includes: identification information of the terminal device and second identification information, and the second identification information includes a tracking area identification TAI, a cell global identification CGI, and public At least one item of the land mobile network identity PLMN ID.
  • the method further includes: after performing cell reselection or changing the serving cell, sending the third indication information to the first core network device or the application server, and the third The indication information includes first identification information and identification information of the first multicast service, and the first identification information includes identification information of the source network device and/or identification information of the terminal device.
  • the terminal device when the terminal device moves, the terminal device sends the third instruction information to the first core network device or the application server via the first network device, and accordingly, the first core network device or the application server according to the third instruction
  • the information addresses the source network device, and informs the source network device of the departure of the terminal device that is interested in receiving the multicast service, so that the source network device is interested in the number of terminal devices in the first multicast service or the number of terminal devices in a certain area. 1.
  • the number of multicast services when the terminal device moves, the terminal device sends the third instruction information to the first core network device or the application server via the first network device, and accordingly, the first core network device or the application server according to the third instruction
  • the information addresses the source network device, and informs the source network device of the departure of the terminal device that is interested in receiving the multicast service, so that the source network device is interested in the number of terminal devices in the first multicast service or the number of terminal devices in a certain area. 1.
  • the number of multicast services when the terminal device moves
  • the sixth aspect of the embodiments of the present application discloses a communication method, the method is suitable for a communication device, the communication device is, for example, a first network device, and includes:
  • the first network device determines the second network device according to the instruction information from the terminal device, and the first network device updates the information that is interested in the reception of the first multicast service according to the context information of the terminal device of the second network device.
  • the number of terminal devices can reuse the existing RNAU process as much as possible to complete the statistics of the number of terminal devices that are interested in receiving the first multicast service.
  • the RNAU process enables security protection to prevent idle terminal devices from performing Reported maliciously but the first network device cannot identify it.
  • the method further includes:
  • the RAN notification area of the configuration radio access network includes a cell.
  • the RNAU process is initiated, triggering the first network device to send request information to the second network device, and to receive the second network device's request information.
  • the flow of context information thereby updating the number of terminal devices interested in the reception of the first multicast service.
  • the method further includes: receiving first indication information from a terminal device, where the first indication information is used to indicate the receiving status of the terminal device for the first multicast service, and The first indication information includes identification information of the first multicast service.
  • the terminal device when the terminal device starts or stops receiving the multicast service, it needs to report the first network device, that is, send the first indication information to the first network device; when the terminal device moves, the terminal device also needs to report the first network device.
  • a network device sends first indication information to the first network device.
  • the first network device can determine the receiving status of the terminal device in time, and make real-time statistics in a certain cell that is interested in receiving multicast services or The number of terminal devices that are receiving multicast services can avoid incorrect statistics due to cell reselection, so that the transmission of multicast services can be maintained more accurately.
  • the receiving state includes: starting to receive the first multicast service, receiving the first multicast service, stopping receiving the first multicast service, and about to receive the first multicast service. At least one of the first multicast service, the desire to receive the first multicast service, the interest in the reception of the first multicast service, and the disinterest in the reception of the first multicast service.
  • the terminal device when the terminal device is in any of the foregoing receiving states, it needs to report to the first network device, which is beneficial for the first network device to count the number of terminal devices in real time.
  • the first indication information further includes identification information of the terminal device.
  • the seventh aspect of the embodiments of the present application discloses a communication method, the method is suitable for a communication device, the communication device is, for example, a second network device, and includes:
  • the second network device can know the departure of a certain terminal device in the cell of the second network device by receiving the request information of the first network device, thereby updating the reception of the multicast service in the cell of the second network device
  • the number of terminal devices that are of interest or being received the first network device determines from the second network device to the first network device according to the identification information of the first multicast service in the context information by receiving the context information of the second network device
  • the identification information of the multicast service that the terminal device is interested in thereby updating the number of terminal devices in the cell of the first network device.
  • the eighth aspect of the embodiments of the present application discloses a communication device.
  • the device may be, for example, a terminal device or a chip in a terminal device, and the device includes:
  • a processing unit configured to determine the receiving state of the first multicast service
  • the communication unit is configured to send first indication information to the first network device, where the first indication information is used to indicate the receiving status of the terminal device of the first multicast service, and the first indication information includes the first The identification information of the multicast service.
  • the receiving state includes: starting to receive the first multicast service, receiving the first multicast service, stopping receiving the first multicast service, and about to receive the first multicast service. At least one of a multicast service, a desire to receive the first multicast service, an interest in the reception of the first multicast service, and an uninteresting in the reception of the first multicast service.
  • the first indication information further includes identification information of the terminal device.
  • the communication unit is further configured to receive scheduling information from the first network device, where the scheduling information is used to indicate the time-frequency resource of the first indication information, and the The scheduling information is carried in system information, radio resource control RRC signaling, random access messages, or downlink control information DCI.
  • the processing unit is further configured to start a timer; determine that the timer expires; and the communication unit is further configured to send the first indication information to the first network device.
  • the communication unit is further configured to send the second indication information to the first network device, where the second indication information includes the first identification information and the first multiple The identification information of the broadcast service, where the first identification information includes the identification information of the source network device and/or the identification information of the terminal device.
  • a ninth aspect of the embodiments of the present application discloses a communication device.
  • the device may be, for example, a terminal device or a chip in the terminal device, and the device includes:
  • the processing unit is configured to send the first indication information to the first network device through the communication unit, where the first indication information includes first identification information and identification information of the first multicast service, and the first The identification information includes the identification information of the source network device and/or the identification information of the terminal device.
  • a tenth aspect of the embodiments of the present application discloses a communication device.
  • the device may be, for example, a first network device or a chip in the first network device, and the device includes:
  • the communication unit is configured to receive first indication information from a terminal device, where the first indication information is used to indicate the receiving status of the terminal device for the first multicast service, and the first indication information includes the first multicast service.
  • the processing unit is configured to determine the receiving state of the terminal device according to the first indication information.
  • the receiving state includes: starting to receive the first multicast service, receiving the first multicast service, stopping receiving the first multicast service, and about to receive the first multicast service. At least one of a multicast service, a desire to receive the first multicast service, an interest in the reception of the first multicast service, and an uninteresting in the reception of the first multicast service.
  • the first indication information further includes identification information of the terminal device.
  • the communication unit is further configured to send scheduling information to the terminal device, where the scheduling information is used to indicate the time-frequency resource of the first indication information, and the scheduling information carries In system information, radio resource control RRC signaling, random access message or downlink control information DCI.
  • the processing unit is further configured to determine a second network device according to second indication information from the terminal device, where the second indication information includes information about the first multicast service Identification information and first identification information, where the first identification information includes identification information of the second network device and/or identification information of the terminal device.
  • the communication unit is further configured to send third indication information to the second network device, where the third indication information is used to instruct the terminal device to leave, and the third The indication information includes identification information of the first multicast service and/or identification information of the terminal device.
  • the communication unit is further configured to receive a handover request message from the second network device, where the handover request message includes fourth indication information, and the fourth indication information includes all The identification information of the first multicast service.
  • the communication unit is further configured to send fifth indication information to a core network device, where the fifth indication information includes identification information of the first multicast service, and the terminal device And second identification information, where the second identification information includes at least one of the tracking area identification TAI, the cell global identification CGI, and the public land mobile network identification PLMN ID.
  • the communication unit is further configured to receive a first message from a terminal device, where the first message includes the fifth indication information.
  • the eleventh aspect of the embodiments of the present application discloses a communication device.
  • the device may be, for example, a first core network device or an application server, or a chip in the first core network device or a chip in an application server, and the device includes:
  • the communication unit is configured to receive first indication information from a terminal device, where the first indication information is used to indicate the receiving status of the terminal device for the first multicast service, and the first indication information includes the first multicast service.
  • the identification information of the broadcast service is configured to indicate the receiving status of the terminal device for the first multicast service.
  • the processing unit is further configured to determine the receiving state of the terminal device according to the first indication information.
  • the receiving state includes: starting to receive the first multicast service, receiving the first multicast service, stopping receiving the first multicast service, and about to receive the first multicast service. At least one of a multicast service, a desire to receive the first multicast service, an interest in the reception of the first multicast service, and an uninteresting in the reception of the first multicast service.
  • the first indication information further includes: identification information of the terminal device and second identification information, and the second identification information includes a tracking area identification TAI, a cell global identification CGI, and public At least one item of the land mobile network identity PLMN ID.
  • the communication unit is further configured to receive second indication information from the first network device, where the second indication information is used to indicate the arrival of the terminal device, and the first network device
  • the second indication information includes at least one of the identification information of the first multicast service, the identification information of the terminal device, the identification information of the source network device, and the identification information of the first network device.
  • the communication unit is further configured to send request information to a second core network device, and the request information is used to request context information of the terminal device; Context information of the network device, where the context information includes identification information of the first multicast service.
  • the processing unit is further configured to determine the number of terminal devices that receive the first multicast service according to the receiving state of the terminal device.
  • the processing unit is further configured to determine the transmission strategy of the first multicast service according to the number of the terminal devices.
  • the communication unit is further configured to send a first message to the first network device, where the first message includes the number of the terminal devices.
  • a twelfth aspect of the embodiments of the present application discloses a communication device.
  • the device may be, for example, a terminal device or a chip in a terminal device, and the device includes:
  • a processing unit configured to determine the receiving state of the first multicast service
  • the communication unit is configured to send first indication information to a first core network device, where the first indication information is used to indicate the receiving status of the terminal device of the first multicast service, and the first indication information includes the first multicast service.
  • the communication unit is configured to send first indication information to a first core network device, where the first indication information is used to indicate the receiving status of the terminal device of the first multicast service, and the first indication information includes the first multicast service. 1. Identification information of the multicast service.
  • the receiving state includes: starting to receive the first multicast service, receiving the first multicast service, stopping receiving the first multicast service, and about to receive the first multicast service. At least one of a multicast service, a desire to receive the first multicast service, an interest in the reception of the first multicast service, and an uninteresting in the reception of the first multicast service.
  • the first indication information further includes: identification information of the terminal device and second identification information, and the second identification information includes a tracking area identification TAI, a cell global identification CGI, and public At least one item of the land mobile network identity PLMN ID.
  • the communication unit is further configured to send the third indication information to the first core network device or the application server, where the third indication information includes the first identification information and the The identification information of the first multicast service, where the first identification information includes the identification information of the source network device and/or the identification information of the terminal device.
  • the thirteenth aspect of the embodiments of the present application discloses a communication device.
  • the device may be, for example, a first network device or a chip in the first network device, and the device includes:
  • the communication unit is configured to send request information to the second network device, where the request information is used to obtain context information of the terminal device;
  • the communication unit is further configured to receive the context information from the second network device, where the context information includes identification information of the first multicast service.
  • the processing unit is further configured to configure the radio access network RAN notification area to include a cell.
  • the communication unit is further configured to receive first indication information from a terminal device, where the first indication information is used to indicate the reception status of the terminal device to the first multicast service ,
  • the first indication information includes identification information of the first multicast service.
  • the receiving state includes: starting to receive the first multicast service, receiving the first multicast service, stopping receiving the first multicast service, and about to receive the first multicast service. At least one of the first multicast service, the desire to receive the first multicast service, the interest in the reception of the first multicast service, and the disinterest in the reception of the first multicast service.
  • the fourteenth aspect of the embodiments of the present application discloses a communication device.
  • the device may be, for example, a second network device or a chip in the second network device, and the device includes:
  • a processing unit configured to receive request information of a first network device through a communication unit, where the request information is used to obtain context information of the terminal device;
  • the processing unit is configured to send the context information to the first network device through the communication unit, where the context information includes identification information of the first multicast service.
  • a fifteenth aspect of the embodiments of the present application discloses a communication device.
  • the communication device includes at least one processor and a transceiver, wherein the at least one processor is used to communicate with other devices through the transceiver, and the memory Used to store a computer program, and the processor calls the computer program to perform the following operations:
  • the receiving state includes: starting to receive the first multicast service, receiving the first multicast service, stopping receiving the first multicast service, and about to receive the first multicast service. At least one of a multicast service, a desire to receive the first multicast service, an interest in the reception of the first multicast service, and an uninteresting in the reception of the first multicast service.
  • the first indication information further includes identification information of the terminal device.
  • the processor is further configured to receive scheduling information from the first network device through the transceiver, and the scheduling information is used to indicate the timing of the first indication information.
  • the scheduling information is carried in system information, radio resource control RRC signaling, random access message or downlink control information DCI.
  • the processor is further configured to start a timer; determine that the timer expires; and send the first indication information to the first network device through the transceiver.
  • the processor is further configured to send the second indication information to the first network device through the transceiver after performing cell reselection or changing a serving cell, so
  • the second indication information includes first identification information and identification information of the first multicast service, and the first identification information includes identification information of the source network device and/or identification information of the terminal device.
  • the sixteenth aspect of the embodiments of the present application discloses a communication device.
  • the communication device includes at least one processor and a transceiver, wherein the at least one processor is used to communicate with other devices through the transceiver, and the memory Used to store a computer program, and the processor calls the computer program to perform the following operations:
  • the processor is further configured to send the first indication information to the first network device through the transceiver after performing cell reselection or changing a serving cell, where the first indication information includes first identification information And the identification information of the first multicast service, where the first identification information includes the identification information of the source network device and/or the identification information of the terminal device.
  • the seventeenth aspect of the embodiments of the present application discloses a communication device.
  • the communication device includes at least one processor and a transceiver, wherein the at least one processor is used to communicate with other devices through the transceiver, and the memory Used to store a computer program, and the processor calls the computer program to perform the following operations:
  • Receive first indication information from a terminal device through the transceiver where the first indication information is used to indicate the receiving status of the terminal device for the first multicast service, and the first indication information includes the first multicast service.
  • the identification information of the broadcast service
  • the receiving state includes: starting to receive the first multicast service, receiving the first multicast service, stopping receiving the first multicast service, and about to receive the first multicast service. At least one of a multicast service, a desire to receive the first multicast service, an interest in the reception of the first multicast service, and an uninteresting in the reception of the first multicast service.
  • the first indication information further includes identification information of the terminal device.
  • the processor is further configured to send scheduling information to the terminal device through the transceiver, where the scheduling information is used to indicate the time-frequency resource of the first indication information,
  • the scheduling information is carried in system information, radio resource control RRC signaling, random access message or downlink control information DCI.
  • the processor is further configured to determine a second network device according to second indication information from the terminal device, where the second indication information includes information about the first multicast service Identification information and first identification information, where the first identification information includes identification information of the second network device and/or identification information of the terminal device.
  • the processor is further configured to send third indication information to the second network device through the transceiver, and the third indication information is used to instruct the terminal device to leave ,
  • the third indication information includes the identification information of the first multicast service and/or the identification information of the terminal device.
  • the processor is further configured to receive a handover request message from the second network device through the transceiver, where the handover request message includes fourth indication information, and the first Fourth, the indication information includes the identification information of the first multicast service.
  • the processor is further configured to send fifth indication information to a core network device through the transceiver, where the fifth indication information includes identification information of the first multicast service
  • the identification information and second identification information of the terminal device where the second identification information includes at least one of a tracking area identification TAI, a cell global identification CGI, and a public land mobile network identification PLMN ID.
  • the processor is further configured to receive a first message from a terminal device through the transceiver, where the first message includes the fifth indication information.
  • the communication device includes at least one processor and a transceiver, wherein the at least one processor is used to communicate with other devices through the transceiver, and the memory Used to store a computer program, and the processor calls the computer program to perform the following operations:
  • Receive first indication information from a terminal device through the transceiver where the first indication information is used to indicate the receiving status of the terminal device for the first multicast service, and the first indication information includes the first multicast service.
  • the identification information of the broadcast service is used to indicate the receiving status of the terminal device for the first multicast service.
  • the receiving state includes: starting to receive the first multicast service, receiving the first multicast service, stopping receiving the first multicast service, and about to receive the first multicast service. At least one of a multicast service, a desire to receive the first multicast service, an interest in the reception of the first multicast service, and an uninteresting in the reception of the first multicast service.
  • the first indication information further includes: identification information of the terminal device and second identification information, and the second identification information includes a tracking area identification TAI, a cell global identification CGI, and public At least one item of the land mobile network identity PLMN ID.
  • the processor is further configured to receive second indication information from the first network device through the transceiver, and the second indication information is used to instruct the terminal device Upon arrival, the second indication information includes at least one of the identification information of the first multicast service, the identification information of the terminal device, the identification information of the source network device, and the identification information of the first network device.
  • the processor is further configured to send request information to the second core network device through the transceiver, and the request information is used to request context information of the terminal device;
  • the context information of the second core network device where the context information includes identification information of the first multicast service.
  • the processor is further configured to determine the number of terminal devices that receive the first multicast service according to the receiving state of the terminal device.
  • the processor is further configured to determine the transmission strategy of the first multicast service according to the number of the terminal devices.
  • the processor is further configured to send a first message to the first network device through the transceiver, where the first message includes the number of the terminal devices.
  • the nineteenth aspect of the embodiments of the present application discloses a communication device.
  • the communication device includes at least one processor and a transceiver, wherein the at least one processor is used to communicate with other devices through the transceiver, and the memory Used to store a computer program, and the processor calls the computer program to perform the following operations:
  • the first indication information includes the first multicast service. 1. Identification information of the multicast service.
  • the receiving state includes: starting to receive the first multicast service, receiving the first multicast service, stopping receiving the first multicast service, and about to receive the first multicast service. At least one of a multicast service, a desire to receive the first multicast service, an interest in the reception of the first multicast service, and an uninteresting in the reception of the first multicast service.
  • the first indication information further includes: identification information of the terminal device and second identification information, and the second identification information includes a tracking area identification TAI, a cell global identification CGI, and public At least one item of the land mobile network identity PLMN ID.
  • the processor is further configured to send the third indication information to the first core network device or the application server through a transceiver after performing cell reselection or changing a serving cell
  • the third indication information includes first identification information and identification information of the first multicast service, and the first identification information includes identification information of the source network device and/or identification information of the terminal device.
  • the twentieth aspect of the embodiments of the present application discloses a communication device.
  • the communication device includes at least one processor and a transceiver, wherein the at least one processor is used to communicate with other devices through the transceiver, and the memory Used to store a computer program, and the processor calls the computer program to perform the following operations:
  • the processor is further configured to configure the radio access network RAN notification area to include a cell.
  • the processor is further configured to receive first indication information from a terminal device through the transceiver, and the first indication information is used to instruct the terminal device to respond to the first multiple The reception status of the broadcast service, and the first indication information includes identification information of the first multicast service.
  • the receiving state includes: starting to receive the first multicast service, receiving the first multicast service, stopping receiving the first multicast service, and about to receive the first multicast service. At least one of the first multicast service, the desire to receive the first multicast service, the interest in the reception of the first multicast service, and the disinterest in the reception of the first multicast service.
  • the first indication information further includes identification information of the terminal device.
  • a communication device in the twenty-first aspect of the embodiments of the present application, includes at least one processor and a transceiver.
  • the at least one processor is used to communicate with other devices through the transceiver.
  • the memory is used to store a computer program, and the processor calls the computer program to perform the following operations:
  • the twenty-second aspect of the embodiments of the present application discloses a chip.
  • the chip includes at least one processor and an interface circuit.
  • the chip further includes a memory.
  • the memory, the interface circuit, and the at least one One processor is interconnected by wires, and a computer program is stored in the at least one memory; when the computer program is executed by the processor, the method described in any aspect or an optional solution of any aspect is implemented.
  • the twenty-third aspect of the embodiments of the present application discloses a computer-readable storage medium, the computer storage medium stores a computer program, and the computer program, when executed by a processor, implements any aspect or options of any aspect The method described in the program.
  • the twenty-fourth aspect of the embodiments of the present application discloses a communication system including the device described in the eighth aspect or the device described in the ninth aspect, the device described in the tenth aspect, and the communication system including the eleventh aspect
  • the twenty-fifth aspect of the embodiments of the present application discloses a computer product.
  • the computer program product runs on a processor, it implements any aspect or the method described in the optional solution of any aspect.
  • FIG. 1 is a schematic structural diagram of a communication system provided by an embodiment of the present application.
  • FIG. 2 is a schematic diagram of transmission of an MBMS service provided by an embodiment of the present application
  • Figure 3 is a 4G counting mechanism provided by an embodiment of the present application.
  • FIG. 4 is a schematic flowchart of a communication method provided by an embodiment of the present application.
  • FIG. 5 is a schematic flowchart of another communication method provided by an embodiment of the present application.
  • FIG. 6 is a schematic flowchart of another communication method provided by an embodiment of the present application.
  • FIG. 7 is a schematic structural diagram of a communication device provided by an embodiment of the present application.
  • FIG. 8 is a schematic structural diagram of another communication device provided by an embodiment of the present application.
  • FIG. 9 is a schematic structural diagram of another communication device provided by an embodiment of the present application.
  • FIG. 10 is a schematic structural diagram of another communication device provided by an embodiment of the present application.
  • FIG. 1 is a schematic structural diagram of a communication system 100 according to an embodiment of the present invention.
  • the communication system 100 may include an application server 110, a core network device 111, a network device 112, a network device 113, and a terminal device 101, The terminal device 102, the terminal device 103, the terminal device 104, the terminal device 105, and the terminal device 106.
  • the communication system 100 to which the method in the embodiments of the present application can be applied may include more or fewer application servers, core network devices, network devices, or terminal devices.
  • Network equipment and terminal equipment can be hardware, software that is functionally divided, or a combination of the two. Communication between network devices and terminal devices can be through other devices or network elements.
  • the network device 112 can perform data transmission with multiple terminal devices, that is, the network device 112 sends downlink data to the terminal device 101-terminal device 106.
  • the terminal device 101-terminal device 106 can also send data to the network device 112. Upstream data.
  • the terminal device 104, the terminal device 105, and the terminal device 106 can also form a communication system.
  • the network device 112 can send downlink data to the terminal device 101, the terminal device 102, and the terminal device 105. Then, the terminal device 105 sends the downlink data to the terminal device 104 or the terminal device 106.
  • the application server 110 or the core network device 111 performs data transmission with the terminal device 101-the terminal device 106 through the network device 112. The method in the embodiment of the present application can be applied to the communication system 100 shown in FIG. 1.
  • Terminal devices including devices that provide users with voice and/or data connectivity, specifically, include devices that provide users with voice, or include devices that provide users with data connectivity, or include devices that provide users with voice and data connectivity Sexual equipment.
  • it may include a handheld device with a wireless connection function, or a processing device connected to a wireless modem.
  • the terminal device can communicate with the core network via a radio access network (RAN), exchange voice or data with the RAN, or exchange voice and data with the RAN.
  • RAN radio access network
  • the terminal equipment may include user equipment (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-type communications (M2M/MTC) terminal equipment, Internet of things (IoT) terminal equipment, light UE, and reduced capabilities User equipment (reduced capability UE, REDCAP UE), 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.
  • UE user equipment
  • D2D device-to-device communication
  • V2X vehicle to everything
  • M2M/MTC Machine-to-machine/machine-type communications
  • IoT Internet of things
  • REDCAP UE reduced capabilities
  • subscriber unit
  • it may include mobile phones (or “cellular” phones), computers with mobile terminal equipment, portable, pocket-sized, hand-held, mobile devices with built-in computers, and so on.
  • PCS personal communication service
  • PCS cordless phones
  • SIP session initiation protocol
  • WLL wireless local loop
  • PDA personal digital assistants
  • restricted devices such as devices with low power consumption, or devices with limited storage capabilities, or devices with limited computing capabilities. Examples include barcodes, radio frequency identification (RFID), sensors, global positioning system (GPS), laser scanners and other information sensing equipment.
  • RFID radio frequency identification
  • GPS global positioning system
  • laser scanners and other information sensing equipment.
  • the terminal device may also be a wearable device.
  • Wearable devices can also be called wearable smart devices or smart wearable devices, etc. It is a general term for using 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 directly worn on the body or integrated into the user's clothes or accessories. Wearable devices are not only a kind of hardware device, but also realize powerful functions through software support, data interaction, and cloud interaction.
  • wearable smart devices include full-featured, large-sized, complete or partial functions that can be achieved without relying on smart phones, such as smart watches or smart glasses, and only focus on a certain type of application function, and need to cooperate with other devices such as smart phones.
  • Use such as all kinds of smart bracelets, smart helmets, smart jewelry, etc. for physical sign monitoring.
  • the various terminal devices described above if they are located on the vehicle (for example, placed in the vehicle or installed in the vehicle), can be regarded as vehicle-mounted terminal equipment, for example, the vehicle-mounted terminal equipment is also called on-board unit (OBU). ).
  • OBU on-board unit
  • the terminal device may also include a relay. Or it can be understood that everything that can communicate with the base station can be regarded as a terminal device.
  • the device for realizing the function of the terminal device may be a terminal device, or a device capable of supporting the terminal device to realize the function, such as a chip system, and the device may be installed in the terminal device.
  • the chip system may be composed of chips, or may include chips and other discrete devices.
  • the device used to implement the functions of the terminal is a terminal device as an example to describe the technical solutions provided in the embodiments of the present application.
  • Network equipment including, for example, access network (AN) equipment, such as a base station (e.g., access point), which may refer to equipment that communicates with wireless terminal equipment through one or more cells on the air interface in the access network
  • AN access network
  • a base station e.g., access point
  • V2X vehicle-to-everything
  • the base station can be used to convert the received air frame and IP packet to each other, as a router between the terminal device and the rest of the access network, where the rest of the access network can include the IP network.
  • the RSU can be a fixed infrastructure entity that supports V2X applications, and can exchange messages with other entities that support V2X applications.
  • the network equipment can also coordinate the attribute management of the air interface.
  • the network equipment may include a long term evolution (LTE) system or an evolved base station (NodeB or eNB or e-NodeB, evolutional NodeB) in a long term evolution-advanced (LTE-A) system, Or it may also include the next generation node B (gNB) in the 5th generation (5G) NR system (also referred to as the NR system) or cloud access network (cloud access network).
  • LTE long term evolution
  • NodeB or eNB or e-NodeB, evolutional NodeB evolutional NodeB
  • LTE-A long term evolution-advanced
  • gNB next generation node B
  • 5G NR system also referred to as the NR system
  • cloud access network cloud access network
  • the centralized unit (CU) and distributed unit (DU) in the radio access network (Cloud RAN) system are not limited in this embodiment of the application.
  • the device used to implement the function of the network device may be a network device, or a device capable of supporting the network device to implement the function, such as a chip system, and the device may be installed in the network device.
  • the device used to implement the functions of the network equipment is a network device as an example to describe the technical solutions provided in the embodiments of the present application.
  • Core network equipment for example, including access and mobility management function (AMF), session management function (session management function, SMF) or user plane function (user plane function, UPF), etc.
  • core Network equipment may include mobility management equipment (mobility management entity, MME), serving gateway (serving gateway, SGW), packet data node gateway (packet data node gateway, PGW), and home subscriber server (home subscriber server) that stores user subscription information.
  • MME mobility management equipment
  • serving gateway serving gateway
  • PGW packet data node gateway
  • home subscriber server home subscriber server
  • the core network equipment may include a gateway switching center (mobile switching center, MSC)/vistor location register (VLR), gateway Mobile switching center (gateway mobile switching center, GMSC), serving GPRS support node (serving general packet radio service support node, SGSN), gateway GPRS support node (gateway general packet radio service support node, GGSN), home location register (home location) register, HLR), etc.
  • the core network device may also be a core network device in a future communication system, which is not limited in the embodiment of the application.
  • the device used to implement the function of the core network device may be a core network device, or a device capable of supporting the core network device to implement the function, such as a chip system, and the device may be installed in the core network device.
  • the device for realizing the functions of the core network equipment is the core network equipment as an example to describe the technical solutions provided by the embodiments of the present application.
  • the application server can be an application server that allows multiple users to use the application at the same time.
  • the application server can be a single server or a server cluster composed of multiple servers, or it can be another server with computing Capable hardware devices.
  • Radio resource control (RRC) state terminal equipment has three RRC states: RRC connected state (connected state), RRC idle state (idle state) and inactive state (inactive state).
  • RRC connected state connected state
  • RRC idle state idle state
  • inactive state inactive state
  • RRC connected state (or, can also be referred to as connected state for short.
  • connected state and “RRC connected state” are the same concept, and the two terms can be interchanged): the terminal device establishes an RRC connection with the network, and at the same time The network has established a connection with the core network for the terminal device, and data transmission can be carried out.
  • RRC idle state (or, can also be referred to as idle state for short.
  • idle state and “RRC idle state” are the same concept, and the two terms can be interchanged): the terminal device does not establish an RRC connection with the network, and the base station The context of the terminal device is not stored, and the network and the core network have not established a connection for the terminal device. If the terminal device needs to enter the RRC connected state from the RRC idle state, it needs to initiate an RRC connection establishment process.
  • RRC inactive state (or, can also be referred to as inactive state for short.
  • inactive state “inactive state”, “deactivated state”, “inactive state”, “RRC inactive state” and “RRC deactivated state” , Is the same concept, these terms can be interchanged): the terminal device entered the RRC connection state before, and then the base station releases the RRC connection, but the base station saves the context of the terminal device, and the network and the core network are established for the terminal The connection of the device has not been released either. If the terminal device needs to enter the RRC connected state again from the RRC inactive state, it needs to initiate the RRC connection recovery process (or called the RRC connection re-establishment process).
  • Multimedia broadcast multicast service is a service for multiple terminal devices, such as live broadcast services, public safety, and batch software update services.
  • the transmission of MBMS services needs to consider the reception of multiple terminal devices.
  • Multicast (multicast) transmission technology can be used, that is, a technology that sends MBMS services to multiple terminal devices at the same time through a public transmission channel; it can also be unicast transmission technology, that is, through separate transmission channels established with multiple terminal devices.
  • Multicast transmission technologies in 4G include single-cell point to multi-point (SC-PTM) and multicast-broadcast single-frequency network (MBSFN) technologies.
  • the MBMS service comes from the data server, as shown in Figure 2, a schematic diagram of the transmission of the MBMS service.
  • the data server sends the MBMS service data to the core network device, and then the core network device sends the MBMS service data through the protocol data unit session (protocol data unit session, PDU session) or the quality of service (QoS) flow (flow)
  • the base station finally sends the MBMS service data to at least one terminal device that receives the MBMS service.
  • the MBMS service can be unicast sent to multiple UEs in a connected state through a dedicated radio bearer established with the UE, or it can be established by establishing a public transmission channel for the MBMS service ( Multicast radio bearer), which is sent in the form of multicast to multiple terminal devices in a connected state or an idle state or an inactive state.
  • the base station or core network needs to decide which transmission method to use to transmit MBMS services to specific terminal devices according to the number of terminal devices currently receiving MBMS services or interested in MBMS services, and Decide how to maintain the transmission of MBMS services.
  • a counting mechanism is designed to calculate the current area within a certain range The number of terminal devices that are receiving a specific MBMS service or are interested in a specific MBMS service.
  • Figure 3 shows the counting mechanism of 4G.
  • the base station can send a counting request to the terminal device through a channel multicast control channel (MCCH) specially designed for multicast transmission.
  • MCCH channel multicast control channel
  • the counting request carries the identification information of the MBMS service, and the terminal device receives it.
  • the MBMS service After the counting request, if the MBMS service is being received or is interested in receiving the MBMS service, it sends a counting response to the base station according to a preset rule, and the base station counts the ongoing MBMS service according to the counting response sent by the terminal device.
  • the number of terminal devices that receive or are interested in the MBMS service so as to maintain the transmission of the MBMS service.
  • the counting request information in the counting mechanism of 3G and 4G all need to rely on the MCCH channel specially designed for MBMS service.
  • 5G 5th generation
  • 5G MBMS service transmission mechanism of the mobile communication technology
  • the existing counting mechanism cannot be used in 5G. Therefore, how does the base station or core network count the number of terminal devices that are receiving MBMS services or are interested in the reception of MBMS services, so as to maintain MBMS Service transmission is a technical problem to be solved by those in the field.
  • FIG. 4 is a communication method provided by an embodiment of the present application.
  • the method includes but is not limited to the following steps:
  • Step S401 The terminal device determines the receiving state of the first service.
  • step S401 is an optional step.
  • the first service may be a multicast service, a unicast service, or other services, which is not limited in this solution.
  • the receiving status is used to indicate the receiving status or subscription status or interest status of the terminal device for the first service, including: starting to receive the first service, receiving the first service, stopping receiving the first service, and about to receive the first service. At least one of a service, a desire to receive the first service, an interest in the reception of the first service, and no interest in the reception of the first service.
  • the receiving state can also be called interested or not interested.
  • the terminal device determines that it is interested in the first service means that the terminal device starts to receive the first service, is receiving the first service, is about to receive the first service, and wants to receive the first service.
  • the terminal device determining that it is not interested in the first service means that the terminal device stops receiving or is not interested in receiving the first service. It should be noted that the terminal device needs to send the receiving status to the network device in the next step, so that the network device can determine whether the terminal device needs to receive the first service, and further, the network device can make statistics about the feeling of the first service.
  • the number of terminal devices of interest, that is, the receiving status is used to indicate that the terminal device is expected to receive the first service or is not expected to receive the first service.
  • the embodiment of this application does not limit the specific definition and sending form of the receiving status.
  • the subsequent description of a service takes the first multicast service as an example.
  • Step S402 The terminal device sends the first indication information to the first network device.
  • the first indication information is used to indicate the receiving status of the terminal device for the first multicast service
  • the first indication information includes identification information of the first multicast service, for example, it may be a temporary mobile group identity (TMGI). ) Or other identification information used to identify the first multicast service.
  • the first indication information also includes identification information of the terminal device, such as international mobile subscriber identification number (IMSI) or temporary mobile subscriber identity (TMSI) or SAE-temporary mobile subscriber identity (SAE-temporary) mobile subscriber identity, S-TMSI) or globally unique temporary UE Identity (GUTI) or cell-Radio network temporary identifier (C-RNTI), etc.
  • IMSI international mobile subscriber identification number
  • TMSI temporary mobile subscriber identity
  • SAE-temporary mobile subscriber identity SAE-temporary mobile subscriber identity
  • S-TMSI globally unique temporary UE Identity
  • C-RNTI cell-Radio network temporary identifier
  • the first multicast service will be received, the first multicast service is being received, the first multicast service is about to be received, the first multicast service is expected (expected) to be received, Or being interested in receiving the first multicast service is simply referred to as subscribing to the first multicast service, and stopping receiving the first multicast service or not interested in receiving the first multicast service is simply referred to as not subscribing to the first multicast service.
  • the first indication information can be carried in a message in the random access process.
  • the random access message is Msg1, Msg3, Msg5, or MsgA. Random access can be a four-step process. Random access or two-step random access process.
  • the first indication information is carried in a media access control control element (MAC CE), a control protocol data unit (Control PDU) or an RRC message.
  • MAC CE media access control control element
  • Control PDU control protocol data unit
  • RRC message an RRC message.
  • this embodiment further includes step S4021: the terminal device determines to send the first indication information to the first network device.
  • the terminal device determining to send the first indication information to the first network device includes the following two implementation manners:
  • the terminal device determines that it needs to report the first indication information according to the receiving status of the first service. Specifically, when the terminal device determines that the receiving status changes, the terminal device determines that it needs to initiate a reporting process. Further, the terminal device sends the first indication information to the first network device. Furthermore, the terminal device can report the receiving status of the first service in time, and the network device can accurately count the number of terminal devices that subscribe to the first multicast service in a specific area.
  • the terminal device determines to report the first indication information according to the change of the serving cell. Specifically, when the terminal device in the idle state or the inactive state changes the serving cell or service area (such as the multicast service area, It may include at least one cell) or after cell reselection occurs, the terminal device may trigger a reporting procedure and send the first indication information to the first network device.
  • the serving cell or service area such as the multicast service area, It may include at least one cell
  • the terminal device may trigger a reporting procedure and send the first indication information to the first network device.
  • the terminal device determines to subscribe to the first multicast service
  • the terminal device sends first indication information to the first network device
  • the first indication information includes the identification information of the first multicast service
  • At least one of the interest indication and the identification information of the terminal device where the interest indication is used to instruct the terminal device to subscribe to the first multicast service.
  • both the indication of interest and the identification information of the terminal device can be reported or only one. If the identification information of the terminal device is reported without reporting the indication of interest, the first network device can determine the terminal according to the identification information of the terminal device. The receiving status of the device.
  • the first network device determines that the number of terminal devices subscribing to the first multicast service has changed according to the interest indication, and then updates the cell or service area of the first network device The number of terminal devices that are interested in subscribing to the first multicast service.
  • the terminal device sends first indication information to the first network device, and the first indication information includes the information of the first multicast service. At least one of the identification information, an indication of disinterest and identification information of the terminal device, where the indication of disinterest is used to indicate not to subscribe to the first multicast service.
  • the non-interest indication and the identification information of the terminal device can both be reported or only one. If the identification information of the terminal device is reported without reporting the non-interest indication, the first network device can determine the terminal device's identification information according to the identification information of the terminal device.
  • the receiving status for example, assuming that the first network device previously known that the terminal device has subscribed to the first multicast service, after the first network device receives the report again, it can be determined that the terminal device reported it due to a change in the receiving status, and it can then be determined as the current one.
  • the terminal device no longer subscribes to the first multicast service.
  • the first network device determines that the number of terminal devices subscribing to the first multicast service has changed according to the indication of disinterest, and then updates the cell or service area of the first network device The number of terminal devices that subscribe to the first multicast service.
  • the network device can determine the receiving state of the terminal device in time, avoiding incorrect statistics due to cell reselection, and thereby more accurately maintaining the transmission of the first multicast service.
  • step S4022 is further included before step S402: the network device instructs the terminal device whether to report the subscription status, and correspondingly, the terminal device determines whether to report the subscription status according to the instruction information from the network device. That is to say, the reporting function of the receiving state provided in this application can be controlled by the network device, thereby improving the flexibility of the network device's regulation and control.
  • the terminal device determines that the first instruction information needs to be reported according to the instruction information from the network device.
  • the network device may send instruction information to the terminal device, and the instruction information is used to indicate whether the terminal device requires Reporting the receiving status of the terminal device, correspondingly, the terminal device receives the instruction information, and determines whether it needs to report the first instruction information according to the instruction information.
  • the terminal device determines that it needs to report the first indication information, it will further determine whether the terminal device’s receiving status of the first service has changed and/or further determine whether the terminal device’s serving cell has changed. If it does, the above two implementations are implemented. Report the first instruction information in a way.
  • the terminal device determines that it does not need to report the first indication information, it does not need to further determine whether the receiving state of the terminal device for the first service has changed and whether the serving cell of the terminal device has changed, so that the first indication information will not be reported. .
  • the instruction information from the network device includes a start reporting instruction (or called an open instruction) and/or a stop reporting instruction (or a close instruction), and the start reporting instruction is used to indicate that the terminal device needs to report for the first
  • the reception status of the multicast service the stop reporting instruction is used to indicate that the terminal device does not need to report the reception status of the first multicast service, where the start reporting instruction and the stop reporting instruction may be two cells.
  • the indication information may be indicated by a cell. When the value of the cell is the first value, it may indicate that the terminal device needs to report the reception status of the first multicast service, and the value of the cell may indicate the second value. The terminal device does not need to report the reception status of the first multicast service.
  • the network device can flexibly control the reporting of the receiving status of the multicast service by the terminal device, for example, when the network device has determined that the number of terminal devices subscribing to the first multicast service is sufficient, or when the network device When it is determined that it is no longer necessary to count the receiving state of the terminal device, an indication information can be sent to the terminal device to indicate that the terminal device no longer needs to report the receiving state, so as to avoid excessive signaling transmission and cause a waste of resources in the communication system.
  • the indication information may indicate without distinguishing service types or service identifiers, that is to say, the network equipment can instruct the terminal equipment to report all services through one indication information, which can be more efficient. Control the reporting of the receiving status, saving resource overhead.
  • the indication information can distinguish between service types or service IDs for indication.
  • the indication information can include service type IDs or service IDs, which are used to indicate whether the terminal device reports the reception status for the corresponding service. .
  • the network device sends instruction information to the terminal device, the instruction information includes a service identifier, and the service identifier corresponds to the second multicast service, and is used to instruct the terminal device to stop reporting the receiving status for the second multicast service, and the terminal device After receiving the instruction information, stop reporting the reception status for the second multicast service according to the instruction information.
  • a network device sends instruction information to a terminal device, the instruction information includes service type information, and after receiving the instruction information, the terminal device determines whether or not it needs to report the service corresponding to the type information according to the service type information .
  • the indication information includes terminal device type information.
  • the terminal device After receiving the indication information, the terminal device determines whether the terminal device of the corresponding type needs or does not need to report according to the terminal device type information. That is, the network device can indicate which terminal devices need to report the first indication information by including at least one of the following: service type identifier, service identifier, terminal device type identifier, and terminal identifier in the indication information, and/or the terminal The device needs to report the reception status for which types of services or specific services, so as to control the reporting of the reception status more flexibly and save communication resources.
  • the terminal device receives scheduling information from the first network device, the scheduling information is used to indicate the time-frequency resource of the first indication information, and the scheduling information is carried in system information, radio resource control RRC Signaling, random access message, downlink control information DCI or random access response (Random Access Response, RAR).
  • RRC Signaling random access message
  • DCI downlink control information
  • RAR random access response
  • the first network device instructs the terminal device to report the resources of the first indication information through scheduling information, for example, dynamic resources (dynamic grant), grant free resources (semi-persistent scheduling), or configuration Resources (configured grant), etc.
  • the scheduling information may include time domain position indication, frequency domain position indication and period, modulation information, etc.
  • the time domain position is used to indicate the time domain position of the first indication information
  • the frequency domain position indication is used to indicate the first indication information.
  • the cycle is the cycle that the frequency domain resource can use.
  • the modulation information includes (modulation and coding scheme, MCS).
  • the terminal device can obtain and send the first indication information resource according to the scheduling information Corresponding time domain position, frequency domain position or resource period, so that the first indication information is sent to the first network device at the corresponding time domain position or frequency domain position in the sending period.
  • the first network device allocates the time-frequency resource for reporting the first indication information to the terminal device, so that the time-frequency resource can be reasonably used.
  • the method further includes: the terminal device determines that the timer expires, and sends the first indication information to the first network device.
  • the duration of the timer is fixed, and the duration of the timer may be predefined by a standard, or configured by the first network device or preset by the terminal device. If the terminal device initiates the reporting process and sends the first indication information to the first network device, the terminal device starts the first timer, where the first timer duration is predefined by the standard, or the first timer duration is determined by The terminal device is preset.
  • the terminal device when the first timer expires, if the terminal device still subscribes to the first multicast service, the first indication information is sent to the first network device again, and the first timer is restarted ; In another possible example, when the first timer expires, if the terminal device is not interested in receiving the first multicast service, the terminal device sends the first indication information to the first network device again, instructing the terminal device not to Subscribe to the first multicast service and restart the timer; in another possible example, when the first timer expires, if the terminal device does not subscribe to the first multicast service, the terminal device does not send the first indication information, and Stop the timer.
  • the first network device may also start a second timer, where the duration of the second timer is predefined by the standard, or the first The duration of the second timer is configured by the network device.
  • the first network device may consider that the terminal device does not subscribe to the first multicast service.
  • the terminal device does not subscribe to the first multicast service, it does not need to send the first indication information to the first network device again, just wait for the second timer of the first network device to expire, or not to wait until the second timer
  • the timeout expires, the first indication information is sent to the first network device.
  • the duration of the first timer and the duration of the second timer, as well as at least one of the processing after starting, restarting, and timeout, can be consistent.
  • the two timers may be defined as the same timer, the first timer is maintained in the terminal device, and the second timer is maintained in the network device.
  • the timing mechanism can effectively prevent the terminal device from reporting errors when the network device does not know the receiving status of the terminal device and cannot accurately count the number of terminal devices. Therefore, with this mechanism, when the network After the timer of the device expires, if it does not receive a report from the terminal device, it can be considered that the terminal device is no longer interested in the multicast service. In addition, with this mechanism, when the terminal device is no longer interested in the multicast service, it does not need to report again. It only needs to wait for the timer to expire without reporting, and the network device can know it, thus saving resources.
  • the terminal device when the receiving state of the first multicast service by the terminal device changes, the terminal device sends the first indication information to the first network device.
  • the change in the receiving state may be the change of subscribing to the first multicast service to not subscribing to the first multicast service, and so on.
  • the terminal device determines that the receiving status of the first multicast service is subscribing to the first multicast service and changing to not subscribing to the first multicast service
  • the terminal device sends the first indication information to the first network device, and accordingly,
  • the first network device determines, according to the first indication information, that the number of terminal devices that subscribe to the first multicast service in the cell of the first network device is reduced by one.
  • the terminal device determines from not subscribing to the first multicast service to subscribing to the first multicast service, the terminal device sends the first indication information to the first network device, and accordingly, the first network device according to the first The indication information determines that the number of terminal devices subscribing to the first multicast service in the cell of the first network device increases by one.
  • the terminal device when the RRC state of the terminal device changes, the terminal device sends the first indication information to the first network device.
  • the terminal device sends the first indication information to the first network device, and/or after the RRC status of the terminal device changes, the terminal device sends the first indication information to the first network device .
  • the terminal device reports the first indication information when it is in the connected state before the conversion and/or the terminal device reports the first indication information when it is in the idle state after the conversion.
  • the terminal device reports the first indication information when it is in the inactive state before the conversion, and/or the terminal device reports the first indication information when it is in the connected state after the conversion .
  • the terminal device after the terminal device undergoes an RRC reconfiguration or RRC reconfiguration or RRC recovery process, the terminal device sends the first indication information to the first network device.
  • the RRC connection re-establishment process will be triggered, and the terminal device can be rebuilt during the re-establishment process or After completion, the first instruction information is sent to the first network device.
  • the first network device reconfigures the parameters for the terminal device in the connected state, it will send an RRC reconfiguration command.
  • the terminal device can send the first indication information to the first network device.
  • the RRC recovery process will be triggered, and the terminal device may send the first indication information to the first network device during the RRC recovery process or after the RRC recovery process is completed.
  • the network equipment corresponding to the rebuilt or restored serving cell Will send request information to the network device corresponding to the serving cell before reconstruction or recovery to obtain the context of the terminal device, so that the network device corresponding to the serving cell before reconstruction or recovery can know the departure of the terminal device and update the corresponding cell
  • the number of terminal devices subscribing to the first multicast service within or in the corresponding service area; and the network device corresponding to the serving cell before reconstruction or restoration can carry the identification of the terminal device subscribing to the first multicast service when sending the terminal device context
  • the network device corresponding to the serving cell can also know the first multicast service subscribed by the terminal device after reconstruction or recovery, so as to update the number of terminal devices subscribed to the first multicast service.
  • the terminal device after performing cell reselection or changing the serving cell or changing the service area (for example, a multicast service area, which may include at least one cell), the terminal device sends the second indication information to the first network device , Correspondingly, the first network device determines the second network device according to the second indication information from the terminal device.
  • the second indication information includes first identification information and identification information of the first multicast service
  • the first identification information includes identification information of the source network device and/or identification information of the terminal device.
  • the first network device After the first network device receives the second indication information from the terminal device, it addresses the second network according to the identification information of the source network device or the identification information of the terminal device (for example, the identification information of the inactive terminal device) equipment.
  • the network device is not aware of the movement of the terminal device. Only when the terminal device moves out of the tracking area (TA), the terminal The device will initiate the tracking area update (TAU) process to tell the core network device that the terminal device has replaced the TA, but because the TA range is generally large and includes many cells, when the terminal device performs cell reselection or replacement services
  • the cell may not necessarily initiate the TAU process, which causes the network equipment to be unable to update the number of terminal equipment subscribing to the first multicast service in time.
  • the terminal device If the terminal device is in an inactive state, after performing cell reselection or changing the serving cell, the network device is not aware of the movement of the terminal device, and only when the terminal device moves out of the RAN-based notification area (RAN-Based notification area, RNA) ), the terminal device will initiate the RAN-based notification area update (RNAU) process to tell the network device that the terminal device has replaced the RNA, but because the range of RNA is generally large, including many cells, so When the terminal device performs cell reselection or changes the serving cell, the RNAU process may not necessarily be initiated, which causes the network device to be unable to update the number of terminal devices that subscribe to the first multicast service in a timely manner.
  • RNAU RAN-based notification area update
  • the terminal device changes the serving cell or service area to trigger the process of sending the second indication information to the first network device. For example, here is the process of reselecting the serving cell of the terminal device from another cell to a certain cell of the first network device to trigger the sending of the second indication information to the first network device.
  • the other cells may be the cells of the first network device or other cells. The community of network equipment.
  • the first network device after the first network device determines the second network device, the first network device sends third indication information to the second network device.
  • the third indication information is used to instruct the terminal device to leave the cell of the second network device
  • the third indication information includes the identification information of the first multicast service
  • the third indication information may also include the The identification information and/or leaving instruction information of the terminal device. If the third instruction information only includes the identification information of the first multicast service, the second network device can only determine the terminal device subscribing to the first multicast service based on the third instruction information One is missing, and the specific terminal device cannot be determined; if the third indication information includes the identification information of the first multicast service and the identification information of the terminal device, the second network device can determine the second network device according to the third indication information Which terminal device subscribed to the first multicast service has left in the cell or service area of.
  • the first network device sends a third instruction to the second network device through the Xn interface (or other interface, such as the X2 interface) between the first network device and the second network device
  • the second network device can know that the terminal device subscribing to the first multicast service has left the cell of the second network device, thereby updating the terminal device subscribing to the first multicast service quantity.
  • the first network device sends the third indication information to the second network device, and the second network device can determine the departure of the terminal device in the cell of the second network device according to the third indication information , So as to update the number of terminal devices in time, and avoid the situation that the transmission strategy is inaccurate due to the untimely update of the number.
  • the first network device receives a first message from the terminal device, the first message is used to indicate configuration information of the second network device, and specifically, the first message includes fifth indication information ,
  • the first network device sends fifth instruction information to the core network device, where the fifth instruction information is used to indicate configuration information of the second network device, and the fifth instruction information includes what is required by the core network device to determine the second network device All information.
  • the first message may be carried in a random access message, and the random access message is Msg1, Msg3, Msg5, or MsgA. If the terminal device is in a connected state, the first message is carried in a media access control control element (MAC CE), a control protocol data unit (Control PDU) or an RRC message.
  • the fifth indication information includes identification information of the first multicast service, first identification information, and second identification information.
  • the first identification information includes identification information of the source network device and/or identification information of the terminal device. 2. Identification information includes at least one of tracking area identity (TAI), cell global identifier (CGI), and public land mobile network identity (PLMN ID), and is not limited to this The listed identification information and the name of the unrestricted identification are only examples.
  • TAI tracking area identity
  • CGI cell global identifier
  • PLMN ID public land mobile network identity
  • the first network device may send a first request message to the terminal device to request more information so that The core network can address the second network device.
  • the terminal device After receiving the first request message, the terminal device sends a first message to the first network device.
  • the first message includes fifth indication information, and the fifth indication information includes the core network device.
  • the first network device When determining all the information required for the second network device, the first network device sends fifth instruction information to the core network device, and after receiving the fifth instruction information, the core network device addresses the second network device according to the fifth instruction information, Send a notification message to the second network device to notify the second network device that a certain terminal device subscribed to the first multicast service has left the cell of the second network device. After receiving the notification message, the second network device updates the second network according to the notification message The number of terminal devices that subscribe to the first multicast service in the cell of the device.
  • the first network device receives a second message from the terminal device, where the second message includes sixth indication information, and the first network device sends the sixth indication information and/or the second message to the core network device. Instructions.
  • the second message is used to indicate configuration information of the second network device
  • the sixth indication information is used to indicate configuration information of the second network device
  • the sixth indication information includes that the core network device determines the second network device Part of the information required for the time, the second indication information includes another part of information required by the core network device to determine the second network device.
  • the second message may be carried in a random access message, and the random access message is Msg1, Msg3, Msg5, or MsgA. If the terminal device is in the connected state, the second message is carried in a media access control control element (MAC CE), a control protocol data unit (Control PDU) or an RRC message.
  • MAC CE media access control control element
  • Control PDU control protocol data unit
  • RRC Radio Resource Control
  • the second indication information includes first identification information and identification information of the first multicast service, the first identification information includes identification information of the source network device and/or identification information of the terminal device, and the sixth indication information includes tracking At least one of the area identifier TAI, the cell global identifier CGI, and the public land mobile network identity identifier PLMN ID, correspondingly, the second indication information includes part of the information required by the core network equipment to determine the second network equipment, and the sixth indication information It includes another part of information required by the core network device to determine the second network device, which is not limited to the identification information listed here, and the name of the unrestricted identification, which is only an example.
  • the first network device determines the second network device, because the first network device discovers that there is no directly available Xn interface between the first network device and the second network device or other reasons, the core is required The network device performs forwarding. Since the second indication information sent by the previous terminal device may not be sufficient to enable the core network device to address the second network device, the first network device may send a second request message to the terminal device to request a change. More information enables the core network to address the second network device. Accordingly, after receiving the second request message, the terminal device sends a second message to the first network device.
  • the second message includes the sixth indication information, and the sixth indication information
  • the core network device determines another part of the information required by the core network device to determine the second network device.
  • the first network device sends a third message to the core network device.
  • the third message includes the sixth indication information and/or the first 2. Indication information.
  • the core network device addresses the second network device according to the third message, and sends a notification message to the second network device to notify the second network device of subscribing to the first multicast service.
  • the second network device updates the number of terminal devices subscribing to the first multicast service in the cell or service area of the second network device according to the notification message.
  • the terminal device since the terminal device has already reported some information for addressing the second network device in the second indication information, there is no need to report repeatedly in the sixth indication information, and only report that the core network device addresses the second network. Additional information required by the device.
  • the content of the indication information in all the embodiments of the present invention is not limited to the identification information listed therein, and does not limit the name of the identification, which is only an example.
  • the first network device receives the handover request message from the second network device.
  • the handover request message includes fourth indication information
  • the fourth indication information includes identification information of the first multicast service.
  • the terminal device sends a measurement report to the second network device (source base station), and the second network device Knowing from the measurement report that the current cell service quality of the terminal device is poor, the second network device determines the first network device (target base station) where the cell with better signal quality is located according to the measurement report, and sends a handover request message to the first network device After the first network device replies to the second network device confirmation message, the second network device sends a handover command to the terminal device, and the terminal device switches to the cell of the first network device, communicates with the first network device, and completes the handover process.
  • the second network device source base station
  • the second network device Knowing from the measurement report that the current cell service quality of the terminal device is poor, the second network device determines the first network device (target base station) where the cell with better signal quality is located according to the measurement report, and sends a handover request message to the first network device
  • the second network device sends a handover command to the terminal device, and the terminal device switches to the cell of the first network device
  • the second network device can learn that the terminal device subscribing to the first multicast service has left during the handover process, so that it can learn that the second network device's serving cell subscribes to the first multicast service
  • the number of terminal devices is reduced by one; and further, the second network device can carry fourth indication information in the handover request message, instructing the handover terminal device to subscribe to the first multicast service, and the first network device can follow the fourth indication information It is learned that one terminal device subscribing to the first multicast service in the serving cell of the first network device has been added. Therefore, after the UE in the connected state moves, both the first network device and the second network device can update the subscription to the first network device through the handover process.
  • the number of terminal equipment for a multicast service is reduced by one; and further, the second network device can carry fourth indication information in the handover request message, instructing the handover terminal device to subscribe to the first multicast service, and the first network device can follow the fourth indication information It is learned that one terminal device subscribing to
  • the first network device can determine that a terminal device in the cell of the second network device is handed over to the cell of the first network device by receiving the handover request message of the second network device, which is beneficial to the first network device.
  • the network device updates the number of terminal devices that subscribe to the first multicast service in a timely manner, so as to more accurately maintain the transmission of the multicast service.
  • Step S403 The first network device receives the first indication information from the terminal device.
  • the embodiment of the present application further includes the following steps:
  • Step S404 The first network device determines the receiving state of the terminal device according to the first indication information.
  • step S402 for the meaning of the first indication information and the receiving status, refer to step S402, which will not be repeated here.
  • the first network device may determine which terminal device sent the first indication information according to the identification information of the terminal device. If there is no identification information of the terminal device in the information maintained for the first multicast service, the first network device uses the first indication information to determine which terminal device to subscribe to the first multicast service, thereby determining to subscribe to the first multicast service. The number of terminal devices for the service has increased by one; assuming that the information maintained for the first multicast service contains the identification information of the terminal device, the first network device uses the first indication information to determine which terminal device does not subscribe to the first multicast service. A multicast service, thereby determining that the number of terminal devices subscribing to the first multicast service is reduced by one.
  • the first indication information includes the identification information of the first multicast service and a start indication, and the start indication is used to instruct the terminal device to subscribe to the first multicast service, and the first network device determines to subscribe to the first multicast service through the start indication.
  • the first indication information includes the identification information of the first multicast service and the stop instruction, and the stop instruction is used to indicate that the terminal device does not subscribe to the first multicast service, and the first network device determines to subscribe to the first multicast service through the stop instruction
  • Step S405 The first network device determines the number of terminal devices that subscribe to the first multicast service according to the receiving state of the terminal device.
  • the first network device determines that the number of terminal devices subscribing to the first multicast service is increased by one; if the receiving status of the terminal device is not subscribing to the first multicast service Broadcast service, the first network device determines that the number of terminal devices subscribing to the first multicast service is reduced by one.
  • Step S406 The first network device determines the transmission strategy of the first multicast service according to the number of terminal devices subscribing to the first multicast service.
  • the number of terminal devices subscribing to the first multicast service is used to indicate that they have started to receive the first multicast service, are receiving the first multicast service, are about to receive the first multicast service, and hope (expected) to receive the first multicast service.
  • the number of multicast services, or the number of terminal devices that are interested in the reception of the first multicast service, the transmission strategy is related to the number of terminal devices, the transmission strategy is used to maintain the transmission of the multicast service, and the transmission strategy includes establishment and modification Or release the MBMS service transmission channel (for example, MBMS PDU SESSION or QoS flow or GTP-U tunnel, and use a dedicated bearer to send the first multicast service or use a multicast to send the first multicast service, etc.).
  • the number of terminal devices subscribing to the first multicast service is greater than the first threshold, if it is sent in unicast form, it is necessary to establish its own dedicated bearer for each terminal device to send separately, which consumes a lot of resources.
  • the first network device can use the multicast transmission method to send to the terminal device when the number of terminal devices subscribing to the first multicast service is greater than the first threshold; when the terminal device subscribing to the first multicast service When the number of is less than the second threshold, the first network device may establish its own dedicated bearer for each terminal device to send separately; when there is no terminal device subscribing to the first multicast service in the cell of the first network device, the first network device Send instruction information to the core network device for instructing the core network device to release the multicast service transmission channel with the first network device, and stop sending the first multicast service; and when the first network device’s cell subscribes to the first network device When the number of terminal devices for the multicast service has grown from scratch, the first network device sends instruction information to the core network device, instructing the core network device to establish a multicast service transmission channel with the first network device, and start the first network device.
  • the transmission of the broadcast service in addition, the established multicast service transmission channel
  • the network equipment can know the number of terminal equipment subscribing to the first multicast service in each cell in real time, and maintain the transmission of the multicast service according to the number.
  • FIG. 5 is another communication method provided by an embodiment of the present application. The method includes but is not limited to the following steps:
  • Step S501 The terminal device determines the receiving state of the first service.
  • step S501 is an optional step.
  • the first service may be a multicast service, a unicast service, or other services, which is not limited in this solution.
  • the receiving status is used to indicate the receiving status or subscription status or interest status of the terminal device for the first service, including: starting to receive the first service, receiving the first service, stopping receiving the first service, and about to receive the first service. At least one of a service, a desire to receive the first service, an interest in the reception of the first service, and no interest in the reception of the first service.
  • the receiving state can also be called interested or not interested.
  • the terminal device determines that it is interested in the first service means that the terminal device starts to receive the first service, is receiving the first service, is about to receive the first service, and wants to receive the first service.
  • the terminal device determining that it is not interested in the first service means that the terminal device stops receiving or is not interested in receiving the first service. It should be noted that the terminal device needs to send the receiving status to the network device in the next step, so that the network device can determine whether the terminal device needs to receive the first service, and further, the network device can make statistics about the feeling of the first service.
  • the number of terminal devices of interest, that is, the receiving status is used to indicate that the terminal device is expected to receive the first service or is not expected to receive the first service.
  • the embodiment of this application does not limit the specific definition and sending form of the receiving status.
  • the subsequent description of a service takes the first multicast service as an example.
  • Step S502 The terminal device sends the first indication information to the first core network device or the application server.
  • the first indication information is forwarded by the terminal device to the first core network device or the application server via the first network device.
  • the first indication information is used to indicate the receiving status of the first multicast service by the terminal device, and the first indication information includes identification information of the first multicast service.
  • the first indication information may be a temporary mobile group identity (temporary mobile group identity, TMGI) or other identification information used to identify the first multicast service.
  • the first indication information also includes: identification information of the terminal device and second identification information.
  • the identification information of the terminal device is, for example, an international mobile subscriber identification number (IMSI) or a temporary mobile subscriber identity.
  • IMSI international mobile subscriber identification number
  • the second identification information includes tracking area identity (TAI), cell global identifier (CGI), and public land mobile network identity (PLMN ID) ) At least one item.
  • TMSI tracking area identity
  • CGI cell global identifier
  • PLMN ID public land mobile network identity
  • the first indication information can be carried in a message in the random access process.
  • the random access message is Msg1, Msg3, Msg5, or MsgA. Random access can be a four-step process. Random access or two-step random access.
  • the first indication information is carried in a media access control control element (MAC CE), a control protocol data unit (Control PDU) or an RRC message.
  • MAC CE media access control control element
  • Control PDU control protocol data unit
  • RRC message an RRC message.
  • this embodiment further includes step S5021: the terminal device determines to send the first instruction information to the first core network device or the application server via the network device.
  • the terminal device determines to send the first instruction information to the first core network device or the application server via the network device.
  • step S4021 the terminal device determines to send the first instruction information to the first core network device or the application server via the network device.
  • step S5022 is further included before step S502: the network device instructs the terminal device whether to report the subscription status, and correspondingly, the terminal device determines whether to report the subscription status according to the instruction information from the network device.
  • the network device instructs the terminal device whether to report the subscription status, and correspondingly, the terminal device determines whether to report the subscription status according to the instruction information from the network device.
  • the terminal device when the receiving state of the first multicast service by the terminal device changes, the terminal device sends the first indication information to the first core network device or the application server via the network device.
  • the change in the receiving state may be the change of subscribing to the first multicast service to not subscribing to the first multicast service, and so on.
  • the terminal device determines that the reception status of the first multicast service is subscribing to the first multicast service and changing to not subscribing to the first multicast service
  • the terminal device sends a message to the first core network device or application server via the network device.
  • the first indication information correspondingly, the first core network device or the application server determines according to the first indication information that the number of terminal devices subscribing to the first multicast service in the cell of the first core network device or in the cell of the application server is reduced by one .
  • the terminal device determines that the receiving state of the first multicast service has changed from not subscribing to the first multicast service to subscribing to the first multicast service
  • the terminal device sends the first multicast service to the first core network device or application server via the network device.
  • Indication information correspondingly, the first core network device or application server determines according to the first indication information that the number of terminal devices subscribing to the first multicast service in the cell of the first core network device or in the cell of the application server increases by one .
  • the terminal device when the RRC state of the terminal device changes, the terminal device sends the first indication information to the first core network device or the application server via the network device.
  • the terminal device sends the first indication information to the first core network device or application server via the network device, and/or after the RRC state of the terminal device changes, the terminal device The network device sends the first indication information to the first core network device or the application server.
  • the terminal device reports the first indication information when it is in the connected state before the conversion and/or the terminal device reports the first indication information when it is in the idle state after the conversion.
  • the terminal device reports the first indication information when it is in the inactive state before the conversion, and/or the terminal device reports the first indication information when it is in the connected state after the conversion .
  • the terminal device after the RRC connection of the terminal device is rebuilt, reconfigured, or restored, the terminal device sends the first indication information to the first core network device or the application server via the network device.
  • the RRC connection re-establishment process will be triggered, and the terminal device can either be in the re-establishment process or After the reconstruction is completed, the first indication information is sent to the first core network device or the application server via the network device.
  • the network device reconfigures the parameters for the connected terminal device, it will send an RRC reconfiguration command.
  • the terminal device can send the first indication information to the first core network device or the application server via the network device.
  • the RRC recovery process will be triggered.
  • the terminal device can send the first core network device or application server via the network device during the RRC recovery process or after the RRC recovery process is completed.
  • the first core network device or the application server receives the second indication information from the first network device.
  • the second indication information is used to indicate that the terminal device reaches the cell of the first core network device, and the second indication information includes the identification information of the first multicast service, the identification information of the terminal device, and the source network device's identification information. At least one of the identification information and the identification information of the first network device.
  • the second indication information may also include arrival indication information.
  • the terminal device if the terminal device is in the connected state, after the terminal device that is receiving the first multicast service moves, if the handover condition is met, it will switch from one cell to another. If the handover process executes the path switching process, if the terminal device When switching from the cell of the second network device to the cell of the first network device, the second network device sends a handover request message to the first network device, the first network device replies to the second network device confirmation message, and the second network device receives the confirmation After the message, the second network device sends a notification message to the first core network device, notifying the first core network device that the second network device is about to switch, and the first core network device includes the first network device's information sent by the second network device.
  • the indication information of the identification information is addressed to the first network device, a connection is established with the first network device, and the core network device releases the connection with the second network device.
  • the first core network device will determine that a terminal device under the second network device is switched to the first network device, and the first core network device can know where the terminal device is switched from to where through the path switching process, thereby updating each cell terminal.
  • the number of devices if the path switching process is not performed, the first network device after the handover sends second indication information to the first core network device, which is used to instruct the terminal device to reach the cell of the first network device, or the second before the handover
  • the network device sends instruction information to the first core network device for instructing the terminal device to leave the cell of the second network device. Accordingly, the first core network device may update the number of terminal devices that subscribe to the first multicast service according to the instruction information.
  • the terminal device after performing cell reselection or changing the serving cell or changing the service area (for example, a multicast service area, which may include at least one cell), the terminal device sends this to the first core network device or the application server.
  • the third instruction information for example, a multicast service area, which may include at least one cell
  • the third indication information includes first identification information and identification information of the first multicast service, and the first identification information includes identification information of the source network device and/or identification information of the terminal device.
  • the terminal device turns to the first core network device via the network device to send the third indication information
  • the first core network device addresses the second network device according to the identification information of the source network device or the identification information of the terminal device (for example, the identification information of the terminal device in an inactive state)
  • the first core network device sends a notification message to the second network device.
  • the notification message is used to notify the second network device that the terminal device subscribed to the first multicast service has left the cell of the second network device. Accordingly, the second network device updates The number of terminal devices subscribing to the first multicast service.
  • the first core network device or application server sends request information to the second core network device, and the request information is used to request context information of the terminal device; the first core network device or application server receives The context information of the second core network device, where the context information includes identification information of the first multicast service.
  • each core network device maintains a registration area. If a terminal device moves from the registration area of the second core network device to the registration area of the first core network device, it will re-register to the first core network device. Initiate the registration process or the registration update process.
  • the first core network device determines that the terminal device is moved from the second core network device through the registration process or the registration update process initiated by the terminal device, and the first core network device moves to the second core network device.
  • the core network device sends request information to request the context information of the terminal device.
  • the second core network device determines that a certain terminal device leaves according to the request information, and updates the cell of the second core network device that subscribes to the first multicast service terminal device.
  • the context information includes the identification information of the first multicast service that the terminal device is interested in receiving or is receiving. Accordingly, the first core network device The context information updates the number of terminal devices that subscribe to the first multicast service in the cell of the first core network device.
  • Step S503 The first core network device or the application server receives the first indication information from the terminal device.
  • the embodiment of the present application further includes the following steps:
  • Step S504 The first core network device or the application server determines the receiving state of the terminal device according to the first indication information.
  • step S404 for a specific implementation manner, reference may be made to step S404 in the foregoing embodiment, and this step will not be repeated.
  • Step S505 The first core network device or the application server determines the number of terminal devices that subscribe to the first multicast service according to the receiving state of the terminal device.
  • the first core network device or the application server forwards the reception status of the terminal device to the first network device, and the first network device determines the number of terminal devices that subscribe to the first multicast service based on statistics, which is determined by the first network device The transmission strategy of the first multicast service.
  • step S405 for a specific implementation manner, reference may be made to step S405 in the foregoing embodiment, and this step will not be repeated.
  • Step S506 The first core network device or the application server determines the transmission strategy of the first multicast service according to the number of terminal devices that subscribe to the first multicast service.
  • the number of terminal devices that subscribe to the first multicast service is used to refer to the beginning of receiving the first multicast service, the receiving of the first multicast service, the about to receive the first multicast service, and the hope (expected) to receive the first multicast service.
  • the transmission strategy is related to the number of terminal devices, the transmission strategy is used to maintain the transmission of the multicast service, and the transmission strategy includes establishment, modification, Or release the MBMS service transmission channel (for example, MBMS PDU SESSION or QoS flow or GTP-U tunnel, and use a dedicated bearer to send the first multicast service or use a multicast to send the first multicast service, etc.).
  • the core network device or the application server sends the number of terminal devices that subscribe to the first multicast service to the first network device, and the first network device determines the transmission strategy of the first multicast service.
  • the core network device when the cell of the core network device does not subscribe to the terminal equipment of the first multicast service, the core network device releases the multicast service transmission channel with the first network device, and stops sending the first multicast service; When the number of terminal devices subscribing to the first multicast service in the cell of the network device has grown from scratch, the core network device establishes a multicast service transmission channel with the first network device to start sending the first multicast service; In addition, the established multicast service transmission channel can also be modified.
  • the core network device/application server can know the number of terminal devices subscribing to the first multicast service in each cell in real time, and maintain the transmission of the multicast service according to the number.
  • FIG. 6, is another communication method provided by an embodiment of the present application.
  • the method includes but is not limited to the following steps:
  • Step S601 The first network device determines the second network device.
  • the first network device determines the second network device according to the identification information from the terminal device in the inactive state.
  • the first network device determines the second network device according to the I-RNTI.
  • Step S602 The first network device sends the request information to the second network device.
  • the request information is used to obtain the context information of the terminal device.
  • the second network device After the first network device sends the request information to the second network device, correspondingly, after the second network device obtains the request information, it determines according to the request information that the terminal device that subscribes to the first multicast service leaves the second network device. Therefore, it can be known that the number of terminal devices that subscribe to the first multicast service in the cell of the second network device is reduced by one.
  • Step S603 The second network device receives the request information from the first network device.
  • Step S604 The second network device sends the context information of the terminal device to the first network device.
  • the context information includes identification information of the first multicast service.
  • Step S605 The first network device receives the context information from the terminal device of the second network device.
  • the context information includes identification information of the first multicast service.
  • the first network device determines that the terminal device subscribes to the first multicast service according to the identification information of the first multicast service in the context information, so that the first network device can learn the first network device’s status according to the context information. One more subscription to the first multicast service in the cell.
  • the first network device configures the radio access network RAN notification area to include only one cell.
  • each RNA will contain a list of cells. Here it is stipulated that RNA contains only one cell.
  • the RNAU process will be initiated. If the RNAU process is initiated, the first A network device will ask the second network device for the context of the terminal device. The second network device can determine that the terminal device that subscribes to the first multicast service in the cell of the second network device has left, so that it can know that the cell of the second network device is in the cell The number of terminal devices subscribing to the first multicast service is reduced by one.
  • the first network device receives first indication information from the terminal device, the first indication information is used to indicate the receiving state of the terminal device for the first multicast service, and the first indication information includes The identification information of the first multicast service.
  • step 402 in the above-mentioned embodiment, which will not be repeated here.
  • the terminal device in the inactive state if the terminal device in the idle state wants to receive multicast services, optionally, you can enter the inactive state first, so that you can use this method to perform Information reported.
  • This embodiment can reuse the existing RNAU process as much as possible, complete the statistics of the number of terminal devices interested in the reception of the first multicast service, and improve the communication efficiency of the communication system.
  • the RNAU process enables security protection, it is relatively It is safer than the idle state terminal device reporting.
  • the idle state terminal device can be restricted from reporting information, which can prevent the idle state terminal device from maliciously reporting and causing network device statistics errors.
  • FIG. 7 is a schematic structural diagram of a communication device according to an embodiment of the present application.
  • the communication device may be the aforementioned terminal device or a device in the terminal device.
  • the communication device may include a processing unit 701 and a communication unit 702, wherein the detailed description of each unit is as follows.
  • the processing unit 701 is configured to determine the reception status of the first multicast service
  • the communication unit 702 is configured to send first indication information to a first network device, where the first indication information is used to indicate the receiving status of the terminal device of the first multicast service, and the first indication information includes the first multicast service. 1. Identification information of the multicast service.
  • the receiving state includes: starting to receive the first multicast service, receiving the first multicast service, stopping receiving the first multicast service, and about to receive the first multicast service. At least one of a multicast service, a desire to receive the first multicast service, an interest in the reception of the first multicast service, and an uninteresting in the reception of the first multicast service.
  • the first indication information further includes identification information of the terminal device.
  • the communication unit 702 is further configured to receive scheduling information from the first network device, where the scheduling information is used to indicate the time-frequency resource of the first indication information, so The scheduling information is carried in system information, radio resource control RRC signaling, random access message or downlink control information DCI.
  • the processing unit 701 is further configured to start a timer; the processing unit 701 is further configured to determine that the timer expires; and the communication unit 702 is further configured to The first network device sends the first indication information.
  • the communication unit 702 is further configured to send the second indication information to the first network device after performing cell reselection or changing the serving cell, and the second indication
  • the information includes first identification information and identification information of the first multicast service, and the first identification information includes identification information of the source network device and/or identification information of the terminal device.
  • FIG. 8 is a schematic structural diagram of a communication device provided by an embodiment of the present application.
  • the communication device may be the above-mentioned first network device or a device in the first network device.
  • the communication device may include a communication unit 801 and a processing unit 802, wherein the detailed description of each unit is as follows.
  • the communication unit 801 is configured to receive first indication information from a terminal device, where the first indication information is used to indicate the receiving status of the terminal device of the first multicast service, and the first indication information includes the first indication information. Identification information of the multicast service;
  • the processing unit 802 is configured to determine the receiving state of the terminal device according to the first indication information.
  • the receiving state includes: starting to receive the first multicast service, receiving the first multicast service, stopping receiving the first multicast service, and about to receive the first multicast service. At least one of a multicast service, a desire to receive the first multicast service, an interest in the reception of the first multicast service, and an uninteresting in the reception of the first multicast service.
  • the first indication information further includes identification information of the terminal device.
  • the communication unit 801 is further configured to send scheduling information to the terminal device, where the scheduling information is used to indicate the time-frequency resource of the first indication information, and the scheduling information It is carried in system information, radio resource control RRC signaling, random access message or downlink control information DCI.
  • the processing unit 802 is further configured to determine a second network device according to second indication information from the terminal device, where the second indication information includes the first multicast service And first identification information, where the first identification information includes identification information of the second network device and/or identification information of the terminal device.
  • the communication unit 801 is further configured to send third indication information to the second network device, where the third indication information is used to instruct the terminal device to leave, and the first The third indication information includes the identification information of the first multicast service and/or the identification information of the terminal device.
  • the communication unit 801 is further configured to receive a handover request message from the second network device, where the handover request message includes fourth indication information, and the fourth indication information includes The identification information of the first multicast service.
  • the communication unit 801 is further configured to send fifth indication information to a core network device, where the fifth indication information includes identification information of the first multicast service, and the terminal Identification information of the device and second identification information, where the second identification information includes at least one of a tracking area identification TAI, a cell global identification CGI, and a public land mobile network identification PLMN ID.
  • FIG. 9 is a communication device 900 provided by an embodiment of the present application.
  • the device 900 includes a processor 901 and a transceiver 903.
  • the communication device 900 further includes a memory 902.
  • the processor 901 The memory 902 and the transceiver 903 are connected to each other through a bus 904.
  • the memory 902 includes, but is not limited to, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM), or A portable read-only memory (compact disc read-only memory, CD-ROM), the memory 902 is used for related computer programs and data.
  • the transceiver 903 is used to receive and send data.
  • the processor 901 may be one or more central processing units (CPU).
  • the CPU may be a single-core CPU or a multi-core CPU.
  • the processor 901 in the device 900 reads the computer program stored in the memory 902, and is used to perform the following operations:
  • the receiving state includes: starting to receive the first multicast service, receiving the first multicast service, stopping receiving the first multicast service, and about to receive the first multicast service. At least one of a multicast service, a desire to receive the first multicast service, an interest in the reception of the first multicast service, and an uninteresting in the reception of the first multicast service.
  • the first indication information further includes identification information of the terminal device.
  • the processor 901 is configured to receive scheduling information from the first network device through the transceiver 903, where the scheduling information is used to indicate the time-frequency resource of the first indication information,
  • the scheduling information is carried in system information, radio resource control RRC signaling, random access message or downlink control information DCI.
  • the processor 901 is further configured to start a timer; determine that the timer expires; and the processor 901 is configured to send the first instruction to the first network device through the transceiver 903 information.
  • the processor 901 is configured to send the second indication information to the first network device through the transceiver 903 after performing cell reselection or changing the serving cell, and the second indication information is
  • the indication information includes first identification information and identification information of the first multicast service, and the first identification information includes identification information of the source network device and/or identification information of the terminal device.
  • FIG. 10 is a communication device 1000 provided by an embodiment of the present application.
  • the device 1000 includes a processor 1001 and a transceiver 1003.
  • the communication device 1000 further includes a memory 1002, and the processor 1001
  • the memory 1002 and the transceiver 1003 are connected to each other through a bus 1004.
  • the memory 1002 includes, but is not limited to, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM), or A portable read-only memory (compact disc read-only memory, CD-ROM), the memory 1002 is used for related computer programs and data.
  • the transceiver 1003 is used to receive and send data.
  • the processor 1001 may be one or more central processing units (CPUs).
  • CPUs central processing units
  • the processor 1001 is a CPU
  • the CPU may be a single-core CPU or a multi-core CPU.
  • the processor 1001 in the device 1000 reads the computer program stored in the memory 1002, and is used to perform the following operations:
  • Receive first indication information from a terminal device where the first indication information is used to indicate the reception status of the terminal device for a first multicast service, and the first indication information includes identification information of the first multicast service ;
  • the receiving state includes: starting to receive the first multicast service, receiving the first multicast service, stopping receiving the first multicast service, and about to receive the first multicast service. At least one of a multicast service, a desire to receive the first multicast service, an interest in the reception of the first multicast service, and an uninteresting in the reception of the first multicast service.
  • the first indication information further includes identification information of the terminal device.
  • the processor 1001 is further configured to send scheduling information to the terminal device through the transceiver 1003, where the scheduling information is used to indicate the time-frequency resource of the first indication information,
  • the scheduling information is carried in system information, radio resource control RRC signaling, random access message or downlink control information DCI.
  • the processor 1001 is further configured to determine a second network device according to second indication information from the terminal device, where the second indication information includes the first multicast service And first identification information, where the first identification information includes identification information of the second network device and/or identification information of the terminal device.
  • the processor 1001 is further configured to send third indication information to the second network device through the transceiver 1003, and the third indication information is used to instruct the terminal device to leave ,
  • the third indication information includes the identification information of the first multicast service and/or the identification information of the terminal device.
  • the processor 1001 is further configured to send fifth indication information to a core network device through the transceiver 1003, where the fifth indication information includes identification information of the first multicast service
  • the identification information and second identification information of the terminal device where the second identification information includes at least one of a tracking area identification TAI, a cell global identification CGI, and a public land mobile network identification PLMN ID.
  • An embodiment of the present application also provides a chip system.
  • the chip system includes at least one processor, a memory, and an interface circuit.
  • the memory, the transceiver, and the at least one processor are interconnected by wires, and the at least one memory
  • a computer program is stored therein; when the computer program is executed by the processor, it realizes the operation of the terminal device in the embodiment shown in FIG. 4, or realizes the operation of the first network device in the embodiment shown in FIG. 4, and realizes FIG. 5
  • the embodiment of the present application also provides a computer-readable storage medium in which a computer program is stored, and when it runs on a processor, it realizes the operation of the terminal device in the embodiment shown in FIG. 4, or To implement the operation of the first network device in the embodiment shown in FIG. 4, to implement the operation of the terminal device in the embodiment shown in FIG. 5, or to implement the operation of the first core network device or server in the embodiment shown in FIG. 5, to implement FIG. 6 The operation of the first network device in the embodiment shown, or the operation of the second network device in the embodiment shown in FIG. 6 is implemented.
  • the embodiments of the present application also provide a communication system.
  • the communication system includes a terminal device, a first core network device or server, a first network device and a second network device.
  • the operation of the terminal device in the embodiment shown in FIG. 4 is realized, or the operation of the first network device in the embodiment shown in FIG. 4 is realized, the operation of the terminal device in the embodiment shown in FIG. 5 is realized, or the operation of the terminal device in the embodiment shown in FIG.
  • the operation of the first core network device or server in the embodiment shown in FIG. 5 implements the operation of the first network device in the embodiment shown in FIG. 6 or the operation of the second network device in the embodiment shown in FIG. 6.
  • the embodiment of the present application also provides a computer program product.
  • the computer program product runs on a processor, it realizes the operation of the terminal device in the embodiment shown in FIG. 4, or realizes the first network in the embodiment shown in FIG. 4
  • the operation of the device realizes the operation of the terminal device in the embodiment shown in FIG. 5, or realizes the operation of the first core network device or server in the embodiment shown in FIG. 5, and realizes the operation of the first network device in the embodiment shown in FIG. 6 , Or implement the operation of the second network device in the embodiment shown in FIG. 6.
  • the computer program can be stored in a computer readable storage medium.
  • the computer program During execution, it may include the procedures of the foregoing method embodiments.
  • the aforementioned storage media include: ROM or random storage RAM, magnetic disks or optical disks and other media that can store computer program codes.

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Abstract

一种通信方法及相关设备，方法包括：终端设备确定对第一多播业务的接收感兴趣或者正在接收第一多播业务；通过向第一网络设备发送第一指示信息来指示接收状态，其中，第一指示信息包括第一多播业务的标识信息，相应地，第一网络设备根据来自终端设备的第一指示信息确定终端设备的接收状态。采用本申请实施例，能够实时统计对多播业务的接收感兴趣或正在接收多播业务的终端设备的数量，并维护多播业务的传输。

Description

一种通信方法及相关设备
本申请要求于2020年4月7日提交中国专利局、申请号为202010267441.3、申请名称为“一种通信方法及相关设备”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信技术领域，尤其涉及一种通信方法及相关设备。
背景技术
多媒体广播多播业务(multimedia broadcast multicast service，MBMS)来自数据服务器，首先数据服务器将MBMS业务数据发送给核心网设备，然后核心网设备通过协议数据单元会话(protocol data unit session，PDU session)或者服务质量(quality of service，QoS)流(flow)将MBMS业务数据发送给基站，最后基站将MBMS业务数据发送给接收MBMS业务的至少一个终端设备。其中，在基站与终端设备之间，MBMS业务可以通过与终端设备建立的专用无线承载，以单播的形式发送给处于连接态的多个终端设备，也可以通过建立针对该MBMS业务的公共传输通道，以多播的形式发送给处于连接态或者空闲态或者非激活(inactive)态的多个终端设备。在实际发送过MBMS业务的过程中，由于很多接收MBMS业务的终端设备处于空闲态或者inactive态，网络侧无法得知这些终端设备的情况，因而无法针对MBMS业务做精准合适的决策。
发明内容
本申请实施例公开了一种通信方法及相关设备，能够实时统计正在接收或者感兴趣接收多播业务的终端设备的数量，并对多播业务的传输进行维护。
本申请实施例第一方面公开了一种通信方法，所述方法适用于通信装置，所述通信装置例如为终端设备，包括：
确定对第一多播业务的接收状态；
向第一网络设备发送第一指示信息，所述第一指示信息用于指示所述终端设备对第一多播业务的接收状态，所述第一指示信息包括所述第一多播业务的标识信息。
在上述方法中，终端设备开始或者停止接收多播业务的时候，需要上报第一网络设备，即向第一网络设备发送第一指示信息；当终端设备发生移动的时候，终端设备也需要上报第一网络设备，即向第一网络设备发送第一指示信息，通过这样的方式，第一网络设备能够及时确定终端设备的接收状态，根据该接收状态实时统计某个小区内，对多播业务的接收感兴趣或者正在接收多播业务的终端设备的数量，避免因小区重选而错误统计，从而更准确的对多播业务的传输进行维护。
在一种可选的方案中，所述接收状态包括：开始接收所述第一多播业务、正在接收所述第一多播业务、停止接收所述第一多播业务、即将接收所述第一多播业务、希望接收所 述第一多播业务、对所述第一多播业务的接收感兴趣和对第一多播业务的接收不感兴趣中至少一项。
在上述方法中，当终端设备处于上述任意一种接收状态时，都需要上报第一网络设备，有利于第一网络设备及时确定终端设备的接收状态。
在又一种可选的方案中，所述第一指示信息还包括所述终端设备的标识信息。
在又一种可选的方案中，接收来自所述第一网络设备的调度信息，所述调度信息用于指示所述第一指示信息的时频资源，所述调度信息承载于系统信息、无线资源控制RRC信令、随机接入消息或下行控制信息DCI中。
在上述方法中，第一网络设备为终端设备配置发送第一指示信息的时频资源位置，有利于合理的利用时频资源，避免浪费。
在又一种可选的方案中，所述向第一网络设备发送第一指示信息之后，所述方法还包括：启动定时器；确定所述定时器超时；向所述第一网络设备发送所述第一指示信息。
在上述方法中，定时器机制是为了防止终端设备上报出错的时候，网络设备不知道终端设备的接收状态从而无法准确统计终端设备的数量，因此有了这个机制，当网络设备的定时器超时以后，如果没有收到终端设备的上报就可以认为终端设备不再对该多播业务感兴趣。另外采用这个机制，当终端设备不再对该多播业务感兴趣的时候，无需再进行一次上报，只需要等待定时器超时不上报，网络设备即可知道。
在又一种可选的方案中，所述方法还包括：执行小区重选或者更换服务小区后，向所述第一网络设备发送所述第二指示信息，所述第二指示信息包括第一标识信息和所述第一多播业务的标识信息，所述第一标识信息包括源网络设备的标识信息和/或所述终端设备的标识信息。
在上述方法中，当终端设备发生移动时，终端设备向第一网络设备发送第二指示信息，相应地，第一网络设备根据该指示信息寻址源网络设备，告知源网络设备对多播业务的接收感兴趣的终端设备的离开，从而源网络设备更新对第一多播业务的接收感兴趣的终端设备的数量或者某个区域内第一多播业务的数量。
本申请实施例第二方面公开了一种通信方法，所述方法适用于通信装置，所述通信装置例如为终端设备，包括：
执行小区重选或者更换服务小区后，向所述第一网络设备发送所述第一指示信息，所述第一指示信息包括第一标识信息和所述第一多播业务的标识信息，所述第一标识信息包括源网络设备的标识信息和/或所述终端设备的标识信息。
在上述方法中，当终端设备发生移动的时候，终端设备需要上报第一网络设备，即向第一网络设备发送第一指示信息，通过这样的方式，第一网络设备能够及时确定终端设备的接收状态，实时统计某个小区内，对多播业务的接收感兴趣或者正在接收多播业务的终端设备的数量，避免因小区重选而错误统计，从而更准确的对多播业务的传输进行维护。
本申请实施例第三方面公开了一种通信方法，所述方法适用于通信装置，所述通信装置例如为第一网络设备，包括：
接收来自终端设备的第一指示信息，所述第一指示信息用于指示所述终端设备对第一多播业务的接收状态，所述第一指示信息包括所述第一多播业务的标识信息；
根据所述第一指示信息确定所述终端设备的接收状态。
在上述方法中，终端设备开始或者停止接收多播业务的时候，需要上报第一网络设备，即向第一网络设备发送第一指示信息；当终端设备发生移动的时候，终端设备也需要上报第一网络设备，即向第一网络设备发送第一指示信息，通过这样的方式，第一网络设备能够及时确定终端设备的接收状态，根据该接收状态实时统计某个小区内，对多播业务的接收感兴趣或者正在接收多播业务的终端设备的数量，避免因小区重选而错误统计，从而更准确的对多播业务的传输进行维护。
在一种可选的方案中，所述接收状态包括：开始接收所述第一多播业务、正在接收所述第一多播业务、停止接收所述第一多播业务、即将接收所述第一多播业务、希望接收所述第一多播业务、对所述第一多播业务的接收感兴趣和对第一多播业务的接收不感兴趣中至少一项。
在上述方法中，当终端设备处于上述任意一种接收状态时，都需要上报第一网络设备，有利于第一网络设备及时确定终端设备的接收状态。
在又一种可选的方案中，所述第一指示信息还包括所述终端设备的标识信息。
在又一种可选的方案中，所述方法还包括：向所述终端设备发送调度信息，所述调度信息用于指示所述第一指示信息的时频资源，所述调度信息承载于系统信息、无线资源控制RRC信令、随机接入消息或下行控制信息DCI中。
在上述方法中，第一网络设备为终端设备配置发送第一指示信息的时频资源位置，有利于合理的利用时频资源，避免浪费。
在又一种可选的方案中，根据来自所述终端设备的第二指示信息确定第二网络设备，所述第二指示信息包括所述第一多播业务的标识信息和第一标识信息，所述第一标识信息包括所述第二网络设备的标识信息和/或所述终端设备的标识信息。
在又一种可选的方案中，所述方法还包括：向所述第二网络设备发送第三指示信息，所述第三指示信息用于指示所述终端设备离开，所述第三指示信息包括所述第一多播业务的标识信息和/或所述终端设备的标识信息。
在又一种可选的方案中，所述方法还包括：接收来自所述第二网络设备的切换请求消息，所述切换请求消息包括第四指示信息，所述第四指示信息包括所述第一多播业务的标识信息。
在上述方法中，第一网络设备通过接收来自第二网络设备的切换请求消息中的第一多播业务的标识信息，可以知道终端设备感兴趣的多播业务的标识信息，从而更新对第一多播业务的接收感兴趣的终端设备的数量或者某个区域内第一多播业务的数量。
在又一种可选的方案中，所述方法还包括：向核心网设备发送第五指示信息，所述第五指示信息包括所述第一多播业务的标识信息、所述终端设备的标识信息和第二标识信息，所述第二标识信息包括跟踪区标识TAI、小区全球标识CGI和公共陆地移动网络身份标识PLMN ID中至少一项。
在上述方法中，第一网络设备向核心网设备发送第五指示信息，该第五指示信息为了 核心网设备寻址第二网络设备，告知第二网络设备对多播业务的接收感兴趣或者正在接收多播业务的终端设备的离开，从而，第二网络设备更新对第一多播业务的接收感兴趣的终端设备的数量或者某个区域内第一多播业务的数量。
在又一种可选的方案中，所述方法还包括：接收来自终端设备的第一消息，所述第一消息包括所述第五指示信息。
本申请实施例第四方面公开了一种通信方法，所述方法适用于通信装置，所述通信装置例如为第一核心网设备或应用服务器，包括：
接收来自终端设备的第一指示信息，所述第一指示信息用于指示所述终端设备对第一多播业务的接收状态，所述第一指示信息包括所述第一多播业务的标识信息。
根据所述第一指示信息确定所述终端设备的接收状态。
在上述方法中，终端设备开始或者停止接收多播业务的时候，需要经由第一网络设备上报第一核心网设备或应用服务器，即向第一核心网设备或应用服务器发送第一指示信息；当终端设备发生移动的时候，终端设备也需要经由第一网络设备上报第一核心网设备或应用服务器，即向经由第一网络设备上报第一核心网设备或应用服务器发送第一指示信息，通过这样的方式，第一核心网设备或应用服务器能够及时确定终端设备的接收状态，实时统计某个小区内，对多播业务的接收感兴趣或者正在接收多播业务的终端设备的数量，避免因小区重选而错误统计，从而更加准确的对多播业务的传输进行维护。
在一种可选的方案中，所述接收状态包括：开始接收所述第一多播业务、正在接收所述第一多播业务、停止接收所述第一多播业务、即将接收所述第一多播业务、希望接收所述第一多播业务、对所述第一多播业务的接收感兴趣和对第一多播业务的接收不感兴趣中至少一项。
在上述方法中，当终端设备处于上述任意一种接收状态时，都需要经由第一网络设备上报第一核心网设备或应用服务器，有利于第一核心网设备或应用服务器实时统计终端设备的数量。
在又一种可选的方案中，所述第一指示信息还包括：所述终端设备的标识信息和第二标识信息，所述第二标识信息包括跟踪区标识TAI、小区全球标识CGI和公共陆地移动网络身份标识PLMN ID中至少一项。
在又一种可选的方案中，所述方法还包括：接收来自所述第一网络设备的第二指示信息，所述第二指示信息用于指示所述终端设备到达，所述第二指示信息包括所述第一多播业务的标识信息、所述终端设备的标识信息、源网络设备的标识信息和所述第一网络设备的标识信息中的至少一项。
在上述方法中，第一核心网设备或应用服务器接收第一网络设备的第二指示信息，根据该指示信息知道终端设备到达，从而更新对多播业务的接收感兴趣的终端设备的数量。
在又一种可选的方案中，所述方法还包括：向第二核心网设备发送请求信息，所述请求信息用于请求所述终端设备的上下文信息；接收来自所述第二核心网设备的上下文信息，所述上下文信息包括所述第一多播业务的标识信息。
在上述方法中，第一核心网设备向第二核心网设备发送请求信息，请求终端设备的上 下文信息，第一核心网设备根据该上下文信息中的第一多播业务的标识信息，可以知道终端设备感兴趣的多播业务的标识信息，进而更新对多播业务的接收感兴趣的终端设备的数量。
在又一种可选的方案中，所述方法还包括：根据所述终端设备的接收状态确定接收所述第一多播业务的终端设备的数量。
在又一种可选的方案中，所述方法还包括:根据所述终端设备的数量确定所述第一多播业务的传输策略。
在上述方法中，核心网设备或应用服务器根据不同的终端设备的数量确定不同的第一多播业务的传输策略，更加灵活地进行传输。
在又一种可选的方案中，所述方法还包括:向第一网络设备发送第一消息，所述第一消息包括所述终端设备的数量。
本申请实施例第五方面公开了一种通信方法，所述方法适用于通信装置，所述通信装置例如为终端设备，包括：
确定对第一多播业务的接收状态；
向第一核心网设备发送第一指示信息，所述第一指示信息用于指示所述终端设备对第一多播业务的接收状态，所述第一指示信息包括所述第一多播业务的标识信息。
在上述方法中，终端设备开始或者停止接收多播业务的时候，需要经由第一网络设备上报第一核心网设备或应用服务器，即向第一核心网设备或应用服务器发送第一指示信息；当终端设备发生移动的时候，终端设备也需要经由第一网络设备上报第一核心网设备或应用服务器，即向经由第一网络设备上报第一核心网设备或应用服务器发送第一指示信息，通过这样的方式，经由第一网络设备上报第一核心网设备或应用服务器能够及时确定终端设备的接收状态，实时统计某个小区内，对多播业务的接收感兴趣或者正在接收多播业务的终端设备的数量，避免因小区重选而错误统计，从而更加准确的对多播业务的传输进行维护。
在一种可选的方案中，所述接收状态包括：开始接收所述第一多播业务、正在接收所述第一多播业务、停止接收所述第一多播业务、即将接收所述第一多播业务、希望接收所述第一多播业务、对所述第一多播业务的接收感兴趣和对第一多播业务的接收不感兴趣中至少一项。
在上述方法中，当终端设备处于上述任意一种接收状态时，都需要经由第一网络设备上报第一核心网设备或应用服务器，有利于第一核心网设备或应用服务器实时统计终端设备的数量。
在又一种可选的方案中，所述第一指示信息还包括：所述终端设备的标识信息和第二标识信息，所述第二标识信息包括跟踪区标识TAI、小区全球标识CGI和公共陆地移动网络身份标识PLMN ID中至少一项。
在又一种可选的方案中，所述方法还包括：在执行小区重选或者更换服务小区之后，向所述第一核心网设备或应用服务器发送所述第三指示信息，所述第三指示信息包括第一标识信息和所述第一多播业务的标识信息，所述第一标识信息包括源网络设备的标识信息 和/或所述终端设备的标识信息。
在上述方法中，当终端设备发生移动时，终端设备经由第一网络设备向第一核心网设备或应用服务器发送第三指示信息，相应地，第一核心网设备或应用服务器根据该第三指示信息寻址源网络设备，告知源网络设备对多播业务的接收感兴趣的终端设备的离开，从而源网络设备对第一多播业务的接收感兴趣的终端设备的数量或者某个区域内第一多播业务的数量。
本申请实施例第六方面公开了一种通信方法，所述方法适用于通信装置，所述通信装置例如为第一网络设备，包括：
确定第二网络设备；
向第二网络设备发送请求信息，所述请求信息用于获取所述终端设备的上下文信息；
接收来自所述第二网络设备的所述上下文信息，所述上下文信息包括所述第一多播业务的标识信息。
在上述方法中，第一网络设备根据来自终端设备的指示信息确定第二网络设备，第一网络设备根据第二网络设备的终端设备的上下文信息，更新对第一多播业务的接收感兴趣的终端设备的数量，可以尽量重用现有的RNAU流程，完成对第一多播业务的接收感兴趣的终端设备的数量的统计，同时RNAU流程启用了安全保护，可以防止有空闲态的终端设备进行恶意上报而第一网络设备无法识别。
在一种可选的方案中，所述方法还包括：
配置无线接入网RAN通知区包括一个小区。
在上述方法中，通过配置RAN通知区仅包括一个小区，当终端设备离开RAN通知区的时候就会发起RNAU流程，触发第一网络设备向第二网络设备发送请求信息，接收第二网络设备的上下文信息的流程，从而更新对第一多播业务的接收感兴趣的终端设备的数量。
在又一种可选的方案中，所述方法还包括：接收来自终端设备的第一指示信息，所述第一指示信息用于指示所述终端设备对第一多播业务的接收状态，所述第一指示信息包括所述第一多播业务的标识信息。
在上述方法中，终端设备开始或者停止接收多播业务的时候，需要上报第一网络设备，即向第一网络设备发送第一指示信息；当终端设备发生移动的时候，终端设备也需要上报第一网络设备，即向第一网络设备发送第一指示信息，通过这样的方式，第一网络设备能够及时确定终端设备的接收状态，实时统计某个小区内，对多播业务的接收感兴趣或者正在接收多播业务的终端设备的数量，避免因小区重选而错误统计，从而更加准确的对多播业务的传输进行维护。
在又一种可选的方案中，所述接收状态包括：开始接收所述第一多播业务、正在接收所述第一多播业务、停止接收所述第一多播业务、即将接收所述第一多播业务、希望接收所述第一多播业务、对所述第一多播业务的接收感兴趣和对第一多播业务的接收不感兴趣中至少一项。
在上述方法中，当终端设备处于上述任意一种接收状态时，都需要上报第一网络设备，有利于第一网络设备实时统计终端设备的数量。
在又一种可选的方案中，所述第一指示信息还包括所述终端设备的标识信息。
本申请实施例第七方面公开了一种通信方法，所述方法适用于通信装置，所述通信装置例如为第二网络设备，包括：
接收第一网络设备的请求信息，所述请求信息用于获取所述终端设备的上下文信息；
向所述第一网络设备发送所述上下文信息，所述上下文信息包括所述第一多播业务的标识信息。
在上述方法中，第二网络设备通过接收第一网络设备的请求信息，可以知道第二网络设备的小区中某个终端设备的离开，从而更新第二网络设备的小区中对多播业务的接收感兴趣或者正在接收的终端设备的数量，第一网络设备通过接收第二网络设备的上下文信息，根据上下文信息中的第一多播业务的标识信息确定从第二网络设备到第一网络设备下的终端设备感兴趣的多播业务的标识信息，从而更新第一网络设备的小区的终端设备的数量。
本申请实施例第八方面公开了一种通信装置，所述装置可以例如为终端设备或者终端设备中的芯片，所述装置包括：
处理单元，用于确定对第一多播业务的接收状态；
通信单元，用于向第一网络设备发送第一指示信息，所述第一指示信息用于指示所述终端设备对第一多播业务的接收状态，所述第一指示信息包括所述第一多播业务的标识信息。
在一种可选的方案中，所述接收状态包括：开始接收所述第一多播业务、正在接收所述第一多播业务、停止接收所述第一多播业务、即将接收所述第一多播业务、希望接收所述第一多播业务、对所述第一多播业务的接收感兴趣和对第一多播业务的接收不感兴趣中至少一项。
在又一种可选的方案中，所述第一指示信息还包括所述终端设备的标识信息。
在又一种可选的方案中，所述通信单元，还用于接收来自所述第一网络设备的调度信息，所述调度信息用于指示所述第一指示信息的时频资源，所述调度信息承载于系统信息、无线资源控制RRC信令、随机接入消息或下行控制信息DCI中。
在又一种可选的方案中，处理单元还用于启动定时器；确定所述定时器超时；所述通信单元，还用于向所述第一网络设备发送所述第一指示信息。
在又一种可选的方案中，所述通信单元，还用于向所述第一网络设备发送所述第二指示信息，所述第二指示信息包括第一标识信息和所述第一多播业务的标识信息，所述第一标识信息包括源网络设备的标识信息和/或所述终端设备的标识信息。
关于第八方面或各种可选的实施方式所带来的技术效果，可参考对于第一方面或相应的实施方式的技术效果的介绍。
本申请实施例第九方面公开了一种通信装置，所述装置可以例如为终端设备或者终端设备中的芯片，所述装置包括：
处理单元，用于通过通信单元向所述第一网络设备发送所述第一指示信息，所述第一 指示信息包括第一标识信息和所述第一多播业务的标识信息，所述第一标识信息包括源网络设备的标识信息和/或所述终端设备的标识信息。
关于第九方面或各种可选的实施方式所带来的技术效果，可参考对于第二方面或相应的实施方式的技术效果的介绍。
本申请实施例第十方面公开了一种通信装置，所述装置可以例如为第一网络设备或者第一网络设备中的芯片，所述装置包括：
通信单元，用于接收来自终端设备的第一指示信息，所述第一指示信息用于指示所述终端设备对第一多播业务的接收状态，所述第一指示信息包括所述第一多播业务的标识信息；
处理单元，用于根据所述第一指示信息确定所述终端设备的接收状态。
在一种可选的方案中，所述接收状态包括：开始接收所述第一多播业务、正在接收所述第一多播业务、停止接收所述第一多播业务、即将接收所述第一多播业务、希望接收所述第一多播业务、对所述第一多播业务的接收感兴趣和对第一多播业务的接收不感兴趣中至少一项。
在又一种可选的方案中，所述第一指示信息还包括所述终端设备的标识信息。
在又一种可选的方案中，所述通信单元，还用于向所述终端设备发送调度信息，所述调度信息用于指示所述第一指示信息的时频资源，所述调度信息承载于系统信息、无线资源控制RRC信令、随机接入消息或下行控制信息DCI中。
在又一种可选的方案中，所述处理单元，还用于根据来自所述终端设备的第二指示信息确定第二网络设备，所述第二指示信息包括所述第一多播业务的标识信息和第一标识信息，所述第一标识信息包括所述第二网络设备的标识信息和/或所述终端设备的标识信息。
在又一种可选的方案中，所述通信单元，还用于向所述第二网络设备发送第三指示信息，所述第三指示信息用于指示所述终端设备离开，所述第三指示信息包括所述第一多播业务的标识信息和/或所述终端设备的标识信息。
在又一种可选的方案中，所述通信单元，还用于接收来自所述第二网络设备的切换请求消息，所述切换请求消息包括第四指示信息，所述第四指示信息包括所述第一多播业务的标识信息。
在又一种可选的方案中，所述通信单元，还用于向核心网设备发送第五指示信息，所述第五指示信息包括所述第一多播业务的标识信息、所述终端设备的标识信息和第二标识信息，所述第二标识信息包括跟踪区标识TAI、小区全球标识CGI和公共陆地移动网络身份标识PLMN ID中至少一项。
在又一种可选的方案中，所述通信单元，还用于接收来自终端设备的第一消息，所述第一消息包括所述第五指示信息。
关于第十方面或各种可选的实施方式所带来的技术效果，可参考对于第三方面或相应的实施方式的技术效果的介绍。
本申请实施例第十一方面公开了一种通信装置，所述装置可以例如为第一核心网设备 或应用服务器或者第一核心网设备中的芯片或应用服务器中的芯片，所述装置包括：
通信单元，用于接收来自终端设备的第一指示信息，所述第一指示信息用于指示所述终端设备对第一多播业务的接收状态，所述第一指示信息包括所述第一多播业务的标识信息。
处理单元，还用于根据所述第一指示信息确定所述终端设备的接收状态。
在一种可选的方案中，所述接收状态包括：开始接收所述第一多播业务、正在接收所述第一多播业务、停止接收所述第一多播业务、即将接收所述第一多播业务、希望接收所述第一多播业务、对所述第一多播业务的接收感兴趣和对第一多播业务的接收不感兴趣中至少一项。
在又一种可选的方案中，所述第一指示信息还包括：所述终端设备的标识信息和第二标识信息，所述第二标识信息包括跟踪区标识TAI、小区全球标识CGI和公共陆地移动网络身份标识PLMN ID中至少一项。
在又一种可选的方案中，所述通信单元，还用于接收来自所述第一网络设备的第二指示信息，所述第二指示信息用于指示所述终端设备到达，所述第二指示信息包括所述第一多播业务的标识信息、所述终端设备的标识信息、源网络设备的标识信息和所述第一网络设备的标识信息中的至少一项。
在又一种可选的方案中，所述通信单元，还用于向第二核心网设备发送请求信息，所述请求信息用于请求所述终端设备的上下文信息；接收来自所述第二核心网设备的上下文信息，所述上下文信息包括所述第一多播业务的标识信息。
在又一种可选的方案中，所述处理单元，还用于根据所述终端设备的接收状态确定接收所述第一多播业务的终端设备的数量。
在又一种可选的方案中，所述处理单元，还用于根据所述终端设备的数量确定所述第一多播业务的传输策略。
在又一种可选的方案中，所述通信单元，还用于向第一网络设备发送第一消息，所述第一消息包括所述终端设备的数量。
关于第十一方面或各种可选的实施方式所带来的技术效果，可参考对于第四方面或相应的实施方式的技术效果的介绍。
本申请实施例第十二方面公开了一种通信装置，所述装置可以例如为终端设备或者终端设备中的芯片，所述装置包括：
处理单元，用于确定对第一多播业务的接收状态；
通信单元，用于向第一核心网设备发送第一指示信息，所述第一指示信息用于指示所述终端设备对第一多播业务的接收状态，所述第一指示信息包括所述第一多播业务的标识信息。
在一种可选的方案中，所述接收状态包括：开始接收所述第一多播业务、正在接收所述第一多播业务、停止接收所述第一多播业务、即将接收所述第一多播业务、希望接收所述第一多播业务、对所述第一多播业务的接收感兴趣和对第一多播业务的接收不感兴趣中至少一项。
在又一种可选的方案中，所述第一指示信息还包括：所述终端设备的标识信息和第二标识信息，所述第二标识信息包括跟踪区标识TAI、小区全球标识CGI和公共陆地移动网络身份标识PLMN ID中至少一项。
在又一种可选的方案中，所述通信单元，还用于向所述第一核心网设备或应用服务器发送所述第三指示信息，所述第三指示信息包括第一标识信息和所述第一多播业务的标识信息，所述第一标识信息包括源网络设备的标识信息和/或所述终端设备的标识信息。
关于第十二方面或各种可选的实施方式所带来的技术效果，可参考对于第五方面或相应的实施方式的技术效果的介绍。
本申请实施例第十三方面公开了一种通信装置，所述装置可以例如为第一网络设备或者第一网络设备中的芯片，所述装置包括：
处理单元，用于确定第二网络设备；
通信单元，用于向第二网络设备发送请求信息，所述请求信息用于获取所述终端设备的上下文信息；
所述通信单元，还用于接收来自所述第二网络设备的所述上下文信息，所述上下文信息包括所述第一多播业务的标识信息。
在一种可选的方案中，所述处理单元，还用于配置无线接入网RAN通知区包括一个小区。
在又一种可选的方案中，所述通信单元，还用于接收来自终端设备的第一指示信息，所述第一指示信息用于指示所述终端设备对第一多播业务的接收状态，所述第一指示信息包括所述第一多播业务的标识信息。
在又一种可选的方案中，所述接收状态包括：开始接收所述第一多播业务、正在接收所述第一多播业务、停止接收所述第一多播业务、即将接收所述第一多播业务、希望接收所述第一多播业务、对所述第一多播业务的接收感兴趣和对第一多播业务的接收不感兴趣中至少一项。
关于第十三方面或各种可选的实施方式所带来的技术效果，可参考对于第六方面或相应的实施方式的技术效果的介绍。
本申请实施例第十四方面公开了一种通信装置，所述装置可以例如为第二网络设备或者第二网络设备中的芯片，所述装置包括：
处理单元，用于通过通信单元接收第一网络设备的请求信息，所述请求信息用于获取所述终端设备的上下文信息；
所述处理单元，用于通过所述通信单元向所述第一网络设备发送所述上下文信息，所述上下文信息包括所述第一多播业务的标识信息。
关于第十四方面或各种可选的实施方式所带来的技术效果，可参考对于第七方面或相应的实施方式的技术效果的介绍。
本申请实施例第十五方面公开了一种通信装置，所述通信装置包括至少一个处理器和 收发器，其中，所述至少一个处理器用于通过所述收发器与其它装置通信，所述存储器用于存储计算机程序，所述处理器调用所述计算机程序，用于执行以下操作：
确定对第一多播业务的接收状态；
向第一网络设备发送第一指示信息，所述第一指示信息用于指示所述终端设备对第一多播业务的接收状态，所述第一指示信息包括所述第一多播业务的标识信息。
在一种可选的方案中，所述接收状态包括：开始接收所述第一多播业务、正在接收所述第一多播业务、停止接收所述第一多播业务、即将接收所述第一多播业务、希望接收所述第一多播业务、对所述第一多播业务的接收感兴趣和对第一多播业务的接收不感兴趣中至少一项。
在又一种可选的方案中，所述第一指示信息还包括所述终端设备的标识信息。
在又一种可选的方案中，所述处理器，还用于通过所述收发器接收来自所述第一网络设备的调度信息，所述调度信息用于指示所述第一指示信息的时频资源，所述调度信息承载于系统信息、无线资源控制RRC信令、随机接入消息或下行控制信息DCI中。
在又一种可选的方案中，所述处理器，还用于启动定时器；确定所述定时器超时；通过所述收发器向所述第一网络设备发送所述第一指示信息。
在又一种可选的方案中，所述处理器，还用于在执行小区重选或者更换服务小区后，通过所述收发器向所述第一网络设备发送所述第二指示信息，所述第二指示信息包括第一标识信息和所述第一多播业务的标识信息，所述第一标识信息包括源网络设备的标识信息和/或所述终端设备的标识信息。
关于第十五方面或各种可选的实施方式所带来的技术效果，可参考对于第一方面或相应的实施方式的技术效果的介绍。
本申请实施例第十六方面公开了一种通信装置，所述通信装置包括至少一个处理器和收发器，其中，所述至少一个处理器用于通过所述收发器与其它装置通信，所述存储器用于存储计算机程序，所述处理器调用所述计算机程序，用于执行以下操作：
所述处理器，还用于在执行小区重选或者更换服务小区后，通过所述收发器向所述第一网络设备发送所述第一指示信息，所述第一指示信息包括第一标识信息和所述第一多播业务的标识信息，所述第一标识信息包括源网络设备的标识信息和/或所述终端设备的标识信息。
关于第十六方面或各种可选的实施方式所带来的技术效果，可参考对于第二方面或相应的实施方式的技术效果的介绍。
本申请实施例第十七方面公开了一种通信装置，所述通信装置包括至少一个处理器和收发器，其中，所述至少一个处理器用于通过所述收发器与其它装置通信，所述存储器用于存储计算机程序，所述处理器调用所述计算机程序，用于执行以下操作：
通过所述收发器接收来自终端设备的第一指示信息，所述第一指示信息用于指示所述终端设备对第一多播业务的接收状态，所述第一指示信息包括所述第一多播业务的标识信息；
根据所述第一指示信息确定所述终端设备的接收状态。
在一种可选的方案中，所述接收状态包括：开始接收所述第一多播业务、正在接收所述第一多播业务、停止接收所述第一多播业务、即将接收所述第一多播业务、希望接收所述第一多播业务、对所述第一多播业务的接收感兴趣和对第一多播业务的接收不感兴趣中至少一项。
在又一种可选的方案中，所述第一指示信息还包括所述终端设备的标识信息。
在又一种可选的方案中，所述处理器，还用于通过所述收发器向所述终端设备发送调度信息，所述调度信息用于指示所述第一指示信息的时频资源，所述调度信息承载于系统信息、无线资源控制RRC信令、随机接入消息或下行控制信息DCI中。
在又一种可选的方案中，所述处理器，还用于根据来自所述终端设备的第二指示信息确定第二网络设备，所述第二指示信息包括所述第一多播业务的标识信息和第一标识信息，所述第一标识信息包括所述第二网络设备的标识信息和/或所述终端设备的标识信息。
在又一种可选的方案中，所述处理器，还用于通过所述收发器向所述第二网络设备发送第三指示信息，所述第三指示信息用于指示所述终端设备离开，所述第三指示信息包括所述第一多播业务的标识信息和/或所述终端设备的标识信息。
在又一种可选的方案中，所述处理器，还用于通过所述收发器接收来自所述第二网络设备的切换请求消息，所述切换请求消息包括第四指示信息，所述第四指示信息包括所述第一多播业务的标识信息。
在又一种可选的方案中，所述处理器，还用于通过所述收发器向核心网设备发送第五指示信息，所述第五指示信息包括所述第一多播业务的标识信息、所述终端设备的标识信息和第二标识信息，所述第二标识信息包括跟踪区标识TAI、小区全球标识CGI和公共陆地移动网络身份标识PLMN ID中至少一项。
在又一种可选的方案中，所述处理器，还用于通过所述收发器接收来自终端设备的第一消息，所述第一消息包括所述第五指示信息。
关于第十七方面或各种可选的实施方式所带来的技术效果，可参考对于第三方面或相应的实施方式的技术效果的介绍。
本申请实施例第十八方面公开了一种通信装置，所述通信装置包括至少一个处理器和收发器，其中，所述至少一个处理器用于通过所述收发器与其它装置通信，所述存储器用于存储计算机程序，所述处理器调用所述计算机程序，用于执行以下操作：
通过所述收发器接收来自终端设备的第一指示信息，所述第一指示信息用于指示所述终端设备对第一多播业务的接收状态，所述第一指示信息包括所述第一多播业务的标识信息。
根据所述第一指示信息确定所述终端设备的接收状态。
在一种可选的方案中，所述接收状态包括：开始接收所述第一多播业务、正在接收所述第一多播业务、停止接收所述第一多播业务、即将接收所述第一多播业务、希望接收所述第一多播业务、对所述第一多播业务的接收感兴趣和对第一多播业务的接收不感兴趣中至少一项。
在又一种可选的方案中，所述第一指示信息还包括：所述终端设备的标识信息和第二标识信息，所述第二标识信息包括跟踪区标识TAI、小区全球标识CGI和公共陆地移动网络身份标识PLMN ID中至少一项。
在又一种可选的方案中，所述处理器，还用于通过所述收发器接收来自所述第一网络设备的第二指示信息，所述第二指示信息用于指示所述终端设备到达，所述第二指示信息包括所述第一多播业务的标识信息、所述终端设备的标识信息、源网络设备的标识信息和所述第一网络设备的标识信息中的至少一项。
在又一种可选的方案中，所述处理器，还用于通过所述收发器向第二核心网设备发送请求信息，所述请求信息用于请求所述终端设备的上下文信息；接收来自所述第二核心网设备的上下文信息，所述上下文信息包括所述第一多播业务的标识信息。
在又一种可选的方案中，所述处理器，还用于根据所述终端设备的接收状态确定接收所述第一多播业务的终端设备的数量。
在又一种可选的方案中，所述处理器，还用于根据所述终端设备的数量确定所述第一多播业务的传输策略。
在又一种可选的方案中，所述处理器，还用于通过所述收发器向第一网络设备发送第一消息，所述第一消息包括所述终端设备的数量。
关于第十八方面或各种可选的实施方式所带来的技术效果，可参考对于第四方面或相应的实施方式的技术效果的介绍。
本申请实施例第十九方面公开了一种通信装置，所述通信装置包括至少一个处理器和收发器，其中，所述至少一个处理器用于通过所述收发器与其它装置通信，所述存储器用于存储计算机程序，所述处理器调用所述计算机程序，用于执行以下操作：
确定对第一多播业务的接收状态；
通过所述收发器向第一核心网设备发送第一指示信息，所述第一指示信息用于指示所述终端设备对第一多播业务的接收状态，所述第一指示信息包括所述第一多播业务的标识信息。
在一种可选的方案中，所述接收状态包括：开始接收所述第一多播业务、正在接收所述第一多播业务、停止接收所述第一多播业务、即将接收所述第一多播业务、希望接收所述第一多播业务、对所述第一多播业务的接收感兴趣和对第一多播业务的接收不感兴趣中至少一项。
在又一种可选的方案中，所述第一指示信息还包括：所述终端设备的标识信息和第二标识信息，所述第二标识信息包括跟踪区标识TAI、小区全球标识CGI和公共陆地移动网络身份标识PLMN ID中至少一项。
在又一种可选的方案中，所述处理器，还用于在执行小区重选或者更换服务小区之后，通过收发器向所述第一核心网设备或应用服务器发送所述第三指示信息，所述第三指示信息包括第一标识信息和所述第一多播业务的标识信息，所述第一标识信息包括源网络设备的标识信息和/或所述终端设备的标识信息。
关于第十九方面或各种可选的实施方式所带来的技术效果，可参考对于第五方面或相 应的实施方式的技术效果的介绍。
本申请实施例第二十方面公开了一种通信装置，所述通信装置包括至少一个处理器和收发器，其中，所述至少一个处理器用于通过所述收发器与其它装置通信，所述存储器用于存储计算机程序，所述处理器调用所述计算机程序，用于执行以下操作：
确定第二网络设备；
通过所述收发器向第二网络设备发送请求信息，所述请求信息用于获取所述终端设备的上下文信息；
通过所述收发器接收来自所述第二网络设备的所述上下文信息，所述上下文信息包括所述第一多播业务的标识信息。
在一种可选的方案中，所述处理器，还用于配置无线接入网RAN通知区包括一个小区。
在又一种可选的方案中，所述处理器，还用于通过所述收发器接收来自终端设备的第一指示信息，所述第一指示信息用于指示所述终端设备对第一多播业务的接收状态，所述第一指示信息包括所述第一多播业务的标识信息。
在又一种可选的方案中，所述接收状态包括：开始接收所述第一多播业务、正在接收所述第一多播业务、停止接收所述第一多播业务、即将接收所述第一多播业务、希望接收所述第一多播业务、对所述第一多播业务的接收感兴趣和对第一多播业务的接收不感兴趣中至少一项。
在又一种可选的方案中，所述第一指示信息还包括所述终端设备的标识信息。
关于第二十方面或各种可选的实施方式所带来的技术效果，可参考对于第六方面或相应的实施方式的技术效果的介绍。
本申请实施例第二十一方面公开了一种通信装置，所述通信装置包括至少一个处理器和收发器，其中，所述至少一个处理器用于通过所述收发器与其它装置通信，所述存储器用于存储计算机程序，所述处理器调用所述计算机程序，用于执行以下操作：
通过所述收发器接收第一网络设备的请求信息，所述请求信息用于获取所述终端设备的上下文信息；
通过所述收发器向所述第一网络设备发送所述上下文信息，所述上下文信息包括所述第一多播业务的标识信息
关于第二十一方面或各种可选的实施方式所带来的技术效果，可参考对于第七方面或相应的实施方式的技术效果的介绍。
本申请实施例第二十二方面公开了一种芯片，所述芯片包括至少一个处理器和接口电路，可选的，所述芯片还包括存储器，所述存储器、所述接口电路和所述至少一个处理器通过线路互联，所述至少一个存储器中存储有计算机程序；所述计算机程序被所述处理器执行时实现任意一方面或者任意一方面的可选的方案所描述的方法。
本申请实施例第二十三方面公开了一种计算机可读存储介质，所述计算机存储介质存储有计算机程序，所述计算机程序当被处理器执行时实现任意一方面或者任意一方面的可 选的方案所描述的方法。
本申请实施例第二十四方面公开了一种通信系统，该通信系统包括第八方面所述的装置或第九方面所述的装置、第十方面所述的装置，以及包括第十一方面所述的装置和第十二方面所述的装置，以及包括第十三方面所述的装置和第十四方面所述的装置。
本申请实施例第二十五方面公开了一种计算机产品，当所述计算机程序产品在处理器上运行时，实现任意一方面或者任意一方面的可选的方案所描述的方法。
附图说明
以下对本申请实施例用到的附图进行介绍。
图1是本申请实施例提供的一种通信系统的结构示意图；
图2是本申请实施例提供的一种MBMS业务的传输示意图；
图3是本申请实施例提供的一种4G的counting机制；
图4是本申请实施例提供的一种通信方法流程示意图；
图5是本申请实施例提供的又一种通信方法流程示意图；
图6是本申请实施例提供的又一种通信方法流程示意图；
图7是本申请实施例提供的一种通信装置的结构示意图；
图8是本申请实施例提供的又一种通信装置的结构示意图；
图9是本申请实施例提供的又一种通信装置的结构示意图；
图10是本申请实施例提供的又一种通信装置的结构示意图。
具体实施方式
下面结合本申请实施例中的附图对本申请实施例进行描述。
请参见图1，图1是本发明实施例提供的一种通信系统100的结构示意图，该通信系统100可以包括应用服务器110、核心网设备111、网络设备112、网络设备113与终端设备101、终端设备102、终端设备103、终端设备104、终端设备105和终端设备106。应理解，可以应用本申请实施例的方法的通信系统100中可以包括更多或者更少的应用服务器、核心网设备、网络设备或终端设备。网络设备和终端设备可以是硬件，也可以是从功能上划分的软件或者以上二者的结合。网络设备和终端设备之间可以通过其他设备或网元通信。在该通信系统中网络设备112可以与多个终端设备进行数据传输，即网络设备112向终端设备101-终端设备106发送下行数据，当然，终端设备101-终端设备106也可以向网络设备112发送上行数据。此外，终端设备104、终端设备105和终端设备106也可以组成一个通信系统，在该通信系统中，网络设备112可以发送下行数据给终端设备101、终端设备102和终端设备105，然后，终端设备105将该下行数据发送给终端设备104或终端设备106。应用服务器110或核心网设备111通过网络设备112与终端设备101-终端设备106进行数据传输。在本申请实施例中的方法可以应用于图1所示的通信系统100中。
1)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用户设备(user equipment，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、轻型终端设备(light UE)、能力降低的用户设备(reduced capability UE，REDCAP UE)、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。
而如上介绍的各种终端设备，如果位于车辆上(例如放置在车辆内或安装在车辆内)，都可以认为是车载终端设备，车载终端设备例如也称为车载单元(on-board unit，OBU)。
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，也可以是能够支持终端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。
2)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无线终端设备通信的设备，或者例如，一种车到一切(vehicle-to-everything，V2X)技术中的网络设备为路侧单元(road side unit，RSU)。基站可用于将收到的空中帧与IP分组进行相互转换，作为终端设备与接入网的其 余部分之间的路由器，其中接入网的其余部分可包括IP网络。RSU可以是支持V2X应用的固定基础设施实体，可以与支持V2X应用的其他实体交换消息。网络设备还可协调对空口的属性管理。例如，网络设备可以包括长期演进(long term evolution，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)和分布式单元(distributed unit，DU)，本申请实施例并不限定。
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。
3)核心网设备，例如包括访问和移动管理功能(access and mobility management function，AMF)，会话管理功能(session management function，SMF)或用户面功能(user plane function，UPF)等，或者例如，核心网设备可以包括移动性管理设备(mobility management entity，MME)、服务网关(serving gateway，SGW)、分组数据节点网关(packet data node gateway，PGW)、存储用户签约信息的家庭用户服务器(home subscriber server，HSS)、策略控制单元(Policy and Charging Rule Function，PCRF)等，或者例如，该核心网设备可以包括网关交换中心(mobile switching center，MSC)/拜访位置寄存器(vistor location register，VLR)、网关移动交换中心(gateway mobile switching center，GMSC)、服务GPRS支持节点(serving general packet radio service support node，SGSN)、网关GPRS支持节点(gateway general packet radio service support node，GGSN)、归属位置寄存器(home location register，HLR)等等，该核心网设备还可以为未来通信系统中的核心网设备，本申请实施例并不限定。
本申请实施例中，用于实现核心网设备的功能的装置可以是核心网设备，也可以是能够支持核心网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核心网设备中。在本申请实施例提供的技术方案中，以用于实现核心网设备的功能的装置是核心网设备为例，描述本申请实施例提供的技术方案。
4)应用服务器，例如，可以是让多个用户可以同时使用应用程序的应用程序服务器，该应用服务器可以为单个服务器或者也可以为由多台服务器构成的一个服务器集群，也可以为其他具有计算能力的硬件设备。
5)无线资源控制(radio resource control，RRC)状态，终端设备有3种RRC状态：RRC连接态(connected态)、RRC空闲态(idle态)和非激活态(inactive态)。
RRC连接态(或，也可以简称为连接态。在本文中，“连接态”和“RRC连接态”，是同一概念，两种称呼可以互换)：终端设备与网络建立了RRC连接，同时网络与核心网建立了针对该终端设备连接，可以进行数据传输。
RRC空闲态(或，也可以简称为空闲态。在本文中，“空闲态”和“RRC空闲态”，是同一概念，两种称呼可以互换)：终端设备没有与网络建立RRC连接，基站没有存储该终端设备的上下文，网络与核心网没有建立针对该终端设备连接。如果终端设备需要从RRC 空闲态进入RRC连接态，则需要发起RRC连接建立过程。
RRC非激活态(或，也可以简称为非激活态。在本文中，“去活动态”、“去激活态”、“非激活态”、“RRC非激活态”和“RRC去激活态”，是同一概念，这几种称呼可以互换)：终端设备之前进入了RRC连接态，然后基站释放了RRC连接，但是基站保存了该终端设备的上下文，同时网络与核心网建立的针对该终端设备的连接也没有被释放。如果该终端设备需要从RRC非激活态再次进入RRC连接态，则需要发起RRC连接恢复过程(或者称为RRC连接重建立过程)。
6)多媒体广播多播业务(multimedia broadcast multicast service，MBMS)是面向多个终端设备的业务，例如直播业务、公共安全以及批量软件更新业务等，MBMS业务的传输需要考虑多个终端设备的接收，可以采用多播(组播)传输技术，即通过公共传输途径同时向多个终端设备发送MBMS业务的技术；也可以采用单播传输技术，即通过分别与多个终端设备建立的单独的传输通道向各个终端设备发送MBMS业务的技术。4G中的多播传输技术包括单小区点到多点(single cell point to multi-point，SC-PTM)和多播广播单频网络(Multicast-broadcast single-frequency network，MBSFN)技术。
如上介绍了本申请实施例涉及的一些概念，下面介绍本申请实施例的技术特征。
MBMS业务来自数据服务器，如图2所示，MBMS业务的传输示意图。首先数据服务器将MBMS业务数据发送给核心网设备，然后核心网设备通过协议数据单元会话(protocol data unit session，PDU session)或者服务质量(quality of service，QoS)流(flow)将MBMS业务数据发送给基站，最后基站将MBMS业务数据发送给接收MBMS业务的至少一个终端设备。其中，在基站与终端设备之间，MBMS业务可以通过与UE建立的专用无线承载，以单播的形式发送给处于连接态的多个UE，也可以通过建立针对该MBMS业务的公共传输通道(多播无线承载)，以多播的形式发送给处于连接态或者空闲态或者非激活态的多个终端设备。在实际发送过MBMS业务的过程中，基站或者核心网需要根据当前正在接收MBMS业务或者对MBMS业务感兴趣的终端设备的数量来决定采用何种传输方式将MBMS业务传输给特定的终端设备，以及决定如何维护MBMS业务的传输。
在第三代移动通信技术(the 3th generation，3G)和第四代移动通信技术(the 4th generation，4G)的多播传输技术中，都设计了counting机制，用于统计当前一定范围的区域内正在接收特定MBMS业务或者对特定MBMS业务感兴趣的终端设备的数量。如图3所示，图3表示4G的counting机制。在3G和4G中，基站可以通过一个专门为多播传输设计的信道组播控制信道(multicast control channel,MCCH)向终端设备发送计数请求，计数请求中承载MBMS业务的标识信息，终端设备收到计数请求以后，如果正在进行该MBMS业务的接收或者对该MBMS业务的接收感兴趣，则根据预先设定的规则向基站发送计数响应，基站根据终端设备发送的计数响应统计正在进行该MBMS业务的接收或者对该MBMS业务感兴趣的终端设备数量，从而维护MBMS业务的传输。
在3G和4G的counting机制中的计数请求信息都需要依赖于专门为MBMS业务设计的MCCH信道，而在第五代移动通信技术(the 5th generation，5G)的MBMS业务传输的机制中，为了传输的灵活性，摒弃了MCCH信道，因此现有的counting机制无法用于5G中，因此基站或者核心网如何统计对正在接收MBMS业务或者对MBMS业务的接收感兴 趣的终端设备的数量，从而维护MBMS业务的传输是本领域人员要解决的技术问题。
请参见图4，图4是本申请实施例提供的一种通信方法，该方法包括但不限于如下步骤：
步骤S401：终端设备确定对第一业务的接收状态。
具体地，步骤S401是可选的步骤。该第一业务可以为多播业务或单播业务或者其他的业务，本方案不做限定。
具体地，所述接收状态用于指示终端设备对于第一业务的接收状态或订阅状态或感兴趣状态，包括：开始接收第一业务、正在接收第一业务、停止接收第一业务、即将接收第一业务、希望接收第一业务、对第一业务的接收感兴趣和对第一业务的接收不感兴趣中至少一项。接收状态还可以称为感兴趣或者不感兴趣，相应的，终端设备确定对第一业务感兴趣是指终端设备开始接收第一业务、正在接收第一业务、即将接收第一业务、希望接收第一业务中任意一项，终端设备确定对第一业务不感兴趣是指终端设备停止接收或者对第一业务的接收不感兴趣中任意一项。需要说明的是，终端设备在接下来的步骤中需要发送所述接收状态给网络设备，以便网络设备可以确定所述终端设备是否需要接收第一业务，进一步，网络设备可以统计对于第一业务感兴趣的终端设备个数，也就是说，所述接收状态用于指示终端设备预期接收第一业务或者不预期接收第一业务，本申请实施例不限定接收状态的具体定义和发送形式，该第一业务后续具体以第一多播业务为例进行描述。
步骤S402：终端设备向第一网络设备发送第一指示信息。
具体地，第一指示信息用于指示终端设备对第一多播业务的接收状态，第一指示信息包括第一多播业务的标识信息，例如可以是临时移动组标识(temporary mobile group identity，TMGI)或者其他用于标识第一多播业务的标识信息。第一指示信息还包括终端设备的标识信息，例如国际移动用户识别码(international mobile subscriber identification number，IMSI)或者临时移动用户标识(temporary mobile subscriber identity，TMSI)或者SAE临时移动用户标识(SAE-temporary mobile subscriber identity，S-TMSI)或者全球唯一临时UE标识(globally unique temporary UE Identity，GUTI)或者小区无线网络临时标识(cell-Radio network temporary identifier，C-RNTI)等。在本申请的多个实施例中，为了表述简洁，将开始接收第一多播业务、正在接收第一多播业务、即将接收第一多播业务、希望(预期)接收第一多播业务、或者对第一多播业务的接收感兴趣简称为订阅第一多播业务，将停止接收第一多播业务或者对第一多播业务的接收不感兴趣简称为不订阅第一多播业务。
具体地，当终端设备处于空闲态或非激活态，第一指示信息可以承载于随机接入过程中的消息中，随机接入消息为Msg1、Msg3、Msg5或MsgA，随机接入可以是四步随机接入或者两步随机接入过程。当终端设备处于连接态时，第一指示信息承载于媒体接入控制控制元素(media access control control element,MAC CE)、控制协议数据单元(control protocol data unit，Control PDU)或者RRC消息中。
可选的，在步骤S402之前，本实施例还包括步骤S4021：终端设备确定向第一网络设备发送第一指示信息。具体地，终端设备确定向第一网络设备发送第一指示信息包括以下二种实现方式：
在第一种可能实现的方式中，终端设备根据对第一业务的接收状态确定需要上报第一指示信息，具体的，当终端设备确定接收状态发生改变的时候，终端设备确定需要发起上报流程，进一步，终端设备向第一网络设备发送第一指示信息。进而，终端设备可以及时上报对第一业务的接收状态，网络设备可以准确统计在特定区域内订阅第一多播业务的终端设备的数量。
在第二种可能实现的方式中，终端设备根据服务小区的变化确定上报第一指示信息，具体的，当空闲态或者非激活态的终端设备更换服务小区或者服务区域(比如多播业务区域，可以包含至少一个小区)或者发生小区重选以后，终端设备可以触发上报流程，向第一网络设备发送第一指示信息。
例如，终端设备发起接收状态上报流程以后，该终端设备确定订阅第一多播业务，则终端设备向第一网络设备发送第一指示信息，该第一指示信息包括第一多播业务的标识信息、感兴趣指示和终端设备的标识信息中的至少一个，该感兴趣指示用于指示该终端设备订阅第一多播业务。这里感兴趣指示和终端设备的标识信息可以都上报或者也可以只上报一个，假如上报终端设备的标识信息而不上报感兴趣指示信息，则第一网络设备可以根据终端设备的标识信息确定该终端设备的接收状态，例如假设之前第一网络设备已知终端设备订阅第一多播业务，则当第一网络设备再次接收到上报时，可以确定终端设备是因为接收状态改变而上报，进而可以确定当前该终端设备不订阅第一多播业务。假设上报感兴趣指示而不上报终端设备的标识信息，第一网络设备根据该感兴趣指示判断订阅第一多播业务的终端设备的数量有变化，进而更新第一网络设备的小区内或者服务区域内订阅第一多播业务感兴趣的终端设备的数量。
相应的，终端设备发起接收状态上报流程以后，该终端设备确定不订阅第一多播业务，则终端设备向第一网络设备发送第一指示信息，该第一指示信息包括第一多播业务的标识信息、不感兴趣指示和终端设备的标识信息中的至少一个，该不感兴趣指示用于指示不订阅第一多播业务。这里的不感兴趣指示和终端设备的标识信息可以都上报或者只上报一个，假如上报终端设备的标识信息而不上报不感兴趣指示，则第一网络设备可以根据终端设备的标识信息确定该终端设备的接收状态，例如假设之前第一网络设备已知终端设备订阅第一多播业务，则第一网络设备再次接收到上报以后，可以确定终端设备是由于接收状态改变而上报，进而可以确定为当前该终端设备不再订阅第一多播业务。假设上报不感兴趣指示而不上报终端设备的标识信息，第一网络设备根据该不感兴趣指示判断订阅第一多播业务的终端设备的数量有变化，进而更新第一网络设备的小区内或者服务区域内订阅第一多播业务的终端设备的数量。
通过本申请实施例提供的通信方法，网络设备可以及时确定终端设备的接收状态，避免因小区重选而错误统计，从而更准确的维护第一多播业务的传输。
可选的，在步骤S402之前还包括步骤S4022：网络设备指示终端设备是否上报订阅状态，相应的，终端设备根据来自网络设备的指示信息确定是否上报订阅状态。也就是说，本申请提供的接收状态的上报功能是可以由网络设备进行控制的，进而提高网络设备的调控灵活度。
在一种可选的方案中，终端设备根据来自网络设备的指示信息确定需要上报第一指示 信息，具体的，网络设备可以向终端设备发送指示信息，所述指示信息用于指示终端设备是否需要上报终端设备的接收状态，相应的，终端设备接收指示信息，并根据指示信息确定是否需要上报第一指示信息。当终端设备确定需要上报第一指示信息时才会进一步判断终端设备对第一业务的接收状态是否发生改变和/或进一步判断终端设备的服务小区是否发生变化，如果发生改变则按照上述两种实现方式上报第一指示信息。当终端设备确定不需要上报第一指示信息时，则不需要进一步判断终端设备对第一业务的接收状态是否发生改变和进一步判断终端设备的服务小区是否发生变化，从而不会上报第一指示信息。
例如，所述来自网络设备的指示信息包括开始上报指示(或称为开启指示)和/或停止上报指示(或称为关闭指示)，所述开始上报指示用于指示终端设备需要上报对于第一多播业务的接收状态，所述停止上报指示用于指示终端设备不需要上报对第一多播业务的接收状态，其中开始上报指示和停止上报指示可以是两个信元。又例如，所述指示信息可以通过一个信元来指示，信元的值为第一值时可以指示终端设备需要上报对于第一多播业务的接收状态，信元的值为第二值可以指示终端设备不需要上报对于第一多播业务的接收状态。通过本实现方式提供的通信方法，网络设备可以灵活控制终端设备对多播业务接收状态的上报，例如，当网络设备已经确定订阅第一多播业务的终端设备的数量足够多时，或者当网络设备确定不再需要统计终端设备的接收状态时，可以向终端设备发送指示信息，指示终端设备不再需要上报接收状态，避免过多的信令传输，造成通信系统的资源浪费。
其中，在一种可能的设计中，所述指示信息可以不区分业务类型或业务标识进行指示，也就是说，网络设备可以通过一个指示信息来指示终端设备对于所有业务的上报，进而可以更高效的控制接收状态的上报，节省资源开销。在另一种可能的设计中，所述指示信息可以区分业务类型或业务标识进行指示，具体的，指示信息可以包括业务类型标识或业务标识，用于指示终端设备是否上报针对相应业务的接收状态。例如，网络设备向终端设备发送指示信息，所述指示信息包括业务标识，所述业务标识对应于第二多播业务，用于指示终端设备停止上报针对第二多播业务的接收状态，终端设备接收指示信息后，根据指示信息停止上报针对第二多播业务的接收状态。又例如，网络设备向终端设备发送指示信息，所述指示信息包括业务类型信息，终端设备收到所述指示信息后，根据业务类型信息确定需要或者不需要对所述类型信息对应的业务进行上报。另外所述指示信息包括终端设备类型信息，终端设备收到所述指示信息后，根据终端设备类型信息确定对应类型的终端设备需要或者不需要进行上报。也就是说，网络设备可以通过在指示信息中包括以下至少一种：业务类型标识、业务标识、终端设备类型标识和终端标识，来指示哪些终端设备需要上报第一指示信息，和/或，终端设备需要上报针对哪些类型的业务或哪些指定业务的接收状态，进而更加灵活的控制接收状态的上报，节省通信资源。
在一种可选的方案中，终端设备接收来自该第一网络设备的调度信息，该调度信息用于指示该第一指示信息的时频资源，该调度信息承载于系统信息、无线资源控制RRC信令、随机接入消息，下行控制信息DCI或者随机接入响应(Random Access Response，RAR)中。
具体地，第一网络设备通过调度信息指示终端设备上报第一指示信息的资源，例如， 动态资源(dynamic grant)、免授权资源(grant free)、半静态资源(semi-persistent scheduling)，或者配置资源(configured grant)等。该调度信息可以包括时域位置指示、频域位置指示和周期，调制信息等，该时域位置用于指示第一指示信息的时域位置，该频域位置指示用于为第一指示信息的频域资源位置，该周期为频域资源可以使用的周期，该调制信息包括调制与编码策略((modulation and coding scheme，MCS)。相应地，终端设备可以根据调度信息获取发送第一指示信息资源对应的时域位置，频域位置或者资源周期，从而在该发送周期在对应的时域位置或频域位置上向第一网络设备发送该第一指示信息。
通过本申请实施例提供的通信方法，第一网络设备为终端设备分配上报第一指示信息的时频资源的方式，能够合理的利用时频资源。
在一种可选的方案中，该终端设备向第一网络设备发送第一指示信息之后，该方法还包括：终端设备确定定时器超时，向该第一网络设备发送该第一指示信息。
具体地，该定时器的时长固定，且定时器的时长可以是由标准预定义的，或者是由第一网络设备配置或者是由终端设备预设置的。假如终端设备发起了上报流程，向第一网络设备发送第一指示信息后，终端设备启动第一定时器，其中，第一定时器时长是由标准预定义的，或者第一定时器的时长由终端设备预设置，在一种可能的示例中，当第一定时器超时，如果终端设备仍然订阅第一多播业务，则再次向第一网络设备发送第一指示信息，并且重启第一定时器；在又一种可能的实例中，当第一定时器超时，如果终端设备对第一多播业务的接收不感兴趣，则终端设备再次向第一网络设备发送第一指示信息，指示终端设备不订阅第一多播业务，并且重启定时器；在又一种可能的实例中，当第一定时器超时，如果终端设备不订阅第一多播业务，则终端设备不发送第一指示信息，并且停止计时器。
相应的，当终端设备第一次向第一网络设备发送第一指示信息之后，第一网络设备也可以启动第二定时器，其中，第二定时器的时长是由标准预定义的，或者第二定时器的时长是由网络设备配置的。当第二定时器超时，第一网络设备未再次收到终端设备的第一指示信息，则第一网络设备可以认为终端设备不订阅第一多播业务。当终端设备不订阅第一多播业务时候，可以无需再次向第一网络设备发送第一指示信息，只需等待第一网络设备的第二计时器超时即可，也可以不等到第二计时器超时就向第一网络设备发送第一指示信息。这里第一定时器的时长和第二定时器时长以及启动，重启，超时后的处理中的至少之一可以保持一致。在一种实现方式中，两个定时器可以定义为相同的定时器，第一定时器维护在终端设备中，第二定时器维护在网络设备中。
通过本申请实施例提供的通信方法，该定时机制能够有效地防止终端设备上报出错的时候，网络设备不知道终端设备的接收状态从而无法准确统计终端设备的数量，因此有了这个机制，当网络设备的定时器超时以后，如果没有收到终端设备的上报就可以认为终端设备不再对该多播业务感兴趣。另外采用这个机制，当终端设备不再对该多播业务感兴趣的时候，无需再进行一次上报，只需要等待定时器超时不上报，网络设备即可知道，从而节约了资源。
在一种可选的方案中，终端设备对第一多播业务的接收状态发生改变的时候，终端设 备向该第一网络设备发送该第一指示信息。
具体地，该接收状态发生改变可以是订阅第一多播业务变为不订阅第一多播业务等等。
例如，当终端设备确定对第一多播业务的接收状态为订阅第一多播业务变为不订阅第一多播业务时，则终端设备向第一网络设备发送第一指示信息，相应地，第一网络设备根据该第一指示信息确定第一网络设备的小区内订阅第一多播业务的终端设备的数量减少一个。
相应的，当终端设备确定从不订阅第一多播业务变为订阅第一多播业务时，则终端设备向第一网络设备发送第一指示信息，相应地，第一网络设备根据该第一指示信息确定第一网络设备的小区内的订阅第一多播业务的终端设备的数量增加一个。
在一种可选的方案中，终端设备的RRC状态发生改变的时候，终端设备向该第一网络设备发送该第一指示信息。
具体地，终端设备的RRC状态发生改变前，终端设备向第一网络设备发送该第一指示信息，和/或终端设备的RRC状态发生改变后，终端设备向第一网络设备发送第一指示信息。
例如，终端设备的RRC状态从连接态转换为空闲态，则终端设备在转换前处于连接态时上报第一指示信息和/或终端设备在转换后处于空闲态时上报第一指示信息。
例如，终端设备的RRC状态从非激活态转换为连接态，则终端设备在转换前处于非激活态时上报第一指示信息，和/或终端设备在转换后处于连接态时上报第一指示信息。
在一种可选的方案中，终端设备发生RRC重建或者RRC重配或者RRC恢复过程后，终端设备向该第一网络设备发送该第一指示信息。
具体地，当处于连接态的终端设备，如果出现切换失败、无线链路失败、完整性保护失败以及RRC重配置失败情况，将会触发RRC连接重建过程，那么终端设备可以在重建过程中或者重建完成以后向该第一网络设备发送第一指示信息。当第一网络设备为连接态的终端设备重新配置参数时，会发送RRC重配命令，重配完成后终端设备可以向该第一网络设备发送第一指示信息。当终端设备从非激活态转换为连接态时，将会触发RRC恢复过程，则终端设备可以在RRC恢复过程中或者RRC恢复过程完成以后向该第一网络设备发送第一指示信息。
在一种可选的方案中，终端设备发生RRC重建或者RRC恢复过程后，若重建后或者恢复后的服务小区和重建前的服务小区不同，则重建后或者恢复后的服务小区对应的网络设备会向重建前或者恢复前的服务小区对应的网络设备发送请求信息，用来获取终端设备的上下文，这样重建前或者恢复前的服务小区对应的网络设备可以知道终端设备的离开，从而更新对应小区内或者对应服务区域内订阅第一多播业务的终端设备的数量；而重建前或者恢复前服务小区对应的网络设备在发送终端设备上下文的时候可以承载该终端设备订阅第一多播业务的标识信息，这样重建后或者恢复后服务小区对应的网络设备也可以知道终端设备订阅的第一多播业务，从而更新订阅第一多播业务的终端设备的数量。
在一种可选的方案中，执行小区重选或者更换服务小区或者更换服务区域(比如多播业务区域，可以包含至少一个小区)后，终端设备向该第一网络设备发送该第二指示信息，相应地，第一网络设备根据来自该终端设备的第二指示信息确定第二网络设备。
具体地，该第二指示信息包括第一标识信息和该第一多播业务的标识信息，该第一标识信息包括源网络设备的标识信息和/或该终端设备的标识信息。
具体地，第一网络设备接收来自终端设备的第二指示信息后，根据源网络设备的标识信息或者终端设备的标识信息(例如，非激活态的终端设备的标识信息)寻址到第二网络设备。
例如，若终端设备处于空闲态，在执行小区重选或者更换服务小区后，网络设备对于终端设备的移动是不感知的，只有当终端设备移动出跟踪区(tracking area，TA)的时候，终端设备才会发起跟踪区更新(tracking area update，TAU)过程告诉核心网设备该终端设备更换了TA，但是由于TA的范围一般比较大，包括很多小区，所以当终端设备执行小区重选或者更换服务小区不一定会发起TAU过程，导致网络设备无法及时更新订阅第一多播业务的终端设备的数量。
若终端设备处于非激活态，在执行小区重选或者更换服务小区后，网络设备对于终端设备的移动是不感知的，只有当终端设备移动出基于RAN的通知区域(RAN-Based notification area,RNA)的时候，终端设备才会发起基于RAN的通知区域更新(RAN-Based notification area update，RNAU)过程告诉网络设备该终端设备更换了RNA，但是由于RNA的范围一般比较大，包括很多小区，所以当终端设备执行小区重选或者更换服务小区不一定会发起RNAU过程，导致网络设备无法及时更新订阅第一多播业务的终端设备的数量。
因此，若终端设备处于空闲态或非激活态，该终端设备更换服务小区或者服务区域都要触发向第一网络设备发送第二指示信息的流程。举例说明这里是，终端设备的服务小区从其他小区重选到第一网络设备的某个小区触发向第一网络设备发送第二指示信息的流程，其他小区可以是第一网络设备的小区或者其他网络设备的小区。
在一种可选的方案中，第一网络设备确定第二网络设备之后，第一网络设备向该第二网络设备发送第三指示信息。
具体地，该第三指示信息用于指示该终端设备离开第二网络设备的小区，该第三指示信息包括该第一多播业务的标识信息，可选的该第三指示信息还可以包括该终端设备的标识信息和/或离开指示信息，假若第三指示信息只包括第一多播业务的标识信息，则第二网络设备只能根据第三指示信息判断订阅第一多播业务的终端设备少了一个，而无法确定具体是哪个终端设备；假若第三指示信息包括第一多播业务的标识信息和终端设备的标识信息，则第二网络设备能够根据第三指示信息确定第二网络设备的小区内或者服务区域内具体是哪个订阅第一多播业务的终端设备离开了。
具体地，第一网络设备确定第二网络设备之后，第一网络设备通过第一网络设备和第二网络设备间的Xn接口(或其他接口，例如X2接口)向第二网络设备发送第三指示信息，第二网络设备接收到该第三指示信息后，第二网络设备可以知道订阅第一多播业务的终端 设备离开该第二网络设备的小区，从而更新订阅第一多播业务的终端设备的数量。
通过本申请实施例提供的方法，第一网络设备向该第二网络设备发送第三指示信息的方式，第二网络设备根据第三指示信息可以确定第二网络设备的小区中的终端设备的离开，从而及时的更新终端设备的数量，避免因数量更新不及时导致传输策略不准确的情况。
在一种可选的方案中，第一网络设备接收来自终端设备的第一消息，所述第一消息用于指示第二网络设备的配置信息，具体的，该第一消息包括第五指示信息，第一网络设备向核心网设备发送第五指示信息，该第五指示信息用于指示第二网络设备的配置信息，该第五指示信息中包括核心网设备确定第二网络设备时所需要的所有信息。
具体地，若终端设备处于空闲态或非激活态，第一消息可以承载于随机接入消息中，随机接入消息为Msg1、Msg3、Msg5或MsgA。若终端设备处于连接态，第一消息承载于媒体接入控制控制元素(media access control control element,MAC CE)、控制协议数据单元(control protocol data unit，Control PDU)或者RRC消息中。该第五指示信息包括该第一多播业务的标识信息、第一标识信息和第二标识信息，该第一标识信息包括源网络设备的标识信息和/或该终端设备的标识信息，该第二标识信息包括跟踪区标识(tracking area identity，TAI)、小区全球标识(cell global identifier，CGI)和公共陆地移动网络身份标识(public land mobile network identity，PLMN ID)中至少一项，不限于这里列举的标识信息，以及不限定标识的名称，仅作为示例。
在一种可能的实例中，第一网络设备确定第二网络设备之后，由于第一网络设备发现第一网络设备和第二网络设备间没有直接可用的接口或者其他的原因，导致需要核心网设备进行转发，由于之前的终端设备发送的第二指示信息可能不足以使核心网设备能够寻址到第二网络设备，因此第一网络设备可以向终端设备发送第一请求消息请求更多的信息使得核心网能够寻址到第二网络设备，终端设备接收到第一请求消息后向第一网络设备发送第一消息，该第一消息包括第五指示信息，该第五指示信息中包括核心网设备确定第二网络设备时所需要的所有信息，第一网络设备向核心网设备发送第五指示信息，核心网设备接收到第五指示信息后，根据第五指示信息寻址到第二网络设备，向第二网络设备发送通知消息，通知第二网络设备订阅第一多播业务的某个终端设备离开第二网络设备的小区，第二网络设备接收到通知消息之后，根据通知消息更新第二网络设备的小区订阅第一多播业务的终端设备的数量。
在一种可选的方案中，第一网络设备接收来自终端设备的第二消息，该第二消息包括第六指示信息，第一网络设备向核心网设备发送第六指示信息和/或第二指示信息。
具体地，所述第二消息用于指示第二网络设备的配置信息，该第六指示信息用于指示第二网络设备的配置信息，该第六指示信息中包括核心网设备确定第二网络设备时所需要的部分信息，该第二指示信息中包括核心网设备确定第二网络设备时所需要的另一部分信息。
具体地，若终端设备处于空闲态或非激活态，第二消息可以承载于随机接入消息中，随机接入消息为Msg1、Msg3、Msg5或MsgA。若终端设备处于连接态，第二消息承载于媒体接入控制控制元素(media access control control element,MAC CE)、控制协议数据单元 (control protocol data unit，Control PDU)或者RRC消息中。该第二指示信息包括第一标识信息和该第一多播业务的标识信息，该第一标识信息包括源网络设备的标识信息和/或该终端设备的标识信息，该第六指示信息包括跟踪区标识TAI、小区全球标识CGI和公共陆地移动网络身份标识PLMN ID中至少一项，相应的，第二指示信息中包括核心网设备确定第二网络设备时所需要的部分信息，第六指示信息中包括核心网设备确定第二网络设备时所需要的另一部分信息，不限于这里列举的标识信息，以及不限定标识的名称，仅作为示例。
在一种可能的示例中，第一网络设备确定第二网络设备之后，由于第一网络设备发现第一网络设备和第二网络设备间没有直接可用的Xn接口或者其他的原因，则导致需要核心网设备进行转发，由于之前的终端设备发送的第二指示信息可能不能够足以使核心网设备能够寻址到第二网络设备，因此，第一网络设备可以向终端设备发送第二请求消息请求更多的信息使得核心网能够寻址到第二网络设备，相应地，终端设备接收到第二请求消息后向第一网络设备发送第二消息，第二消息包括第六指示信息，第六指示信息中包括除了第二指示信息外核心网设备确定第二网络设备时所需要的另外的一部分信息，第一网络设备向核心网设备发送第三消息，第三消息包括第六指示信息和/或第二指示信息，核心网设备收到第三消息后，根据第三消息寻址到第二网络设备，向第二网络设备发送通知消息，用于通知第二网络设备订阅第一多播业务的某个终端设备离开第二网络设备的小区，第二网络设备接收到通知消息之后，根据通知消息更新第二网络设备的小区内或者服务区域内订阅第一多播业务的终端设备的数量。这种情况下，由于终端设备已经在第二指示信息中上报了一些用于寻址第二网络设备的信息，所以在第六指示信息中无需重复上报，仅上报核心网设备寻址第二网络设备所需要的额外的信息。本发明所有实施例中的指示信息的内容均不限于里面列举的标识信息，以及不限定标识的名称，仅作为示例。
在一种可选的方案中，第一网络设备接收来自该第二网络设备的切换请求消息。
具体地，该切换请求消息包括第四指示信息，该第四指示信息包括该第一多播业务的标识信息。
具体地，若终端设备处于连接态，当正在接收第一多播业务的终端设备发生移动后，如果满足切换条件，即终端设备向第二网络设备(源基站)发送测量报告，第二网络设备根据测量报告知道终端设备当前小区的服务质量较差，则第二网络设备根据测量报告确定信号质量较好的小区所在的第一网络设备(目标基站)，并向第一网络设备发送切换请求消息，第一网络设备回复第二网络设备确认消息后，第二网络设备向终端设备发送切换命令，终端设备切换到第一网络设备的小区，与第一网络设备进行通信，完成切换过程。从一个小区切换到另一个小区，在切换过程中第二网络设备可以得知订阅第一多播业务的终端设备已经离开，从而可以得知第二网络设备的服务小区中订阅第一多播业务的终端设备减少了一个；而进一步的，第二网络设备可以在切换请求消息中承载第四指示信息，指示该切换的终端设备订阅第一多播业务，第一网络设备可以根据第四指示信息得知第一网络设备的服务小区中订阅第一多播业务的终端设备增加了一个，因此对于连接态的UE发生移动以后，第一网络设备和第二网络设备均可以通过切换过程更新订阅第一多播业务的终端设备的数量。
通过本申请实施例提供的通信方法，第一网络设备通过接收第二网络设备的切换请求消息，可以确定第二网络设备的小区的一个终端设备切换到第一网络设备的小区，有利于第一网络设备及时更新订阅第一多播业务的终端设备的数量，从而更准确的维护多播业务的传输。
步骤S403：第一网络设备接收来自终端设备的第一指示信息。
可选的，本申请实施例还包括如下步骤：
步骤S404：第一网络设备根据第一指示信息确定终端设备的接收状态。
具体地，第一指示信息以及接收状态的含义参考步骤S402中，这里不再赘述。
例如，当第一指示信息包括第一多播业务的标识信息和终端设备的标识信息时，第一网络设备可以根据该终端设备的标识信息确定是具体哪个终端设备发送的第一指示信息，假设之前针对该第一多播业务维护的信息中没有该终端设备的标识信息，则第一网络设备通过该第一指示信息确定具体哪个终端设备订阅第一多播业务，从而确定订阅第一多播业务的终端设备的数量增加了一个；假设之前针对该第一多播业务维护的信息中有该终端设备的标识信息，则第一网络设备通过该第一指示信息确定具体哪个终端设备不订阅第一多播业务，从而确定订阅第一多播业务的终端设备的数量减少了一个。
例如，该第一指示信息包括第一多播业务的标识信息和开始指示，该开始指示用于指示该终端设备订阅第一多播业务，则第一网络设备通过开始指示确定订阅第一多播业务的终端设备多了一个。或者该第一指示信息包括第一多播业务的标识信息和停止指示，该停止指示用于指示该终端设备不订阅第一多播业务，则第一网络设备通过停止指示确定订阅第一多播业务的终端设备少了一个。
步骤S405:第一网络设备根据该终端设备的接收状态确定订阅第一多播业务的终端设备的数量。
具体地，若终端设备的接收状态为订阅第一多播业务，则第一网络设备确定订阅第一多播业务的终端设备的数量增加1个，若终端设备的接收状态为不订阅第一多播业务，则第一网络设备确定订阅第一多播业务的终端设备的数量减少1个。
步骤S406:第一网络设备根据订阅第一多播业务的终端设备的数量确定该第一多播业务的传输策略。
具体地，该订阅第一多播业务的终端设备的数量用于指代开始接收第一多播业务、正在接收第一多播业务、即将接收第一多播业务、希望(预期)接收第一多播业务、或者对第一多播业务的接收感兴趣的终端设备的数量，该传输策略与终端设备的数量相关，该传输策略用于维护多播业务的传输，该传输策略包括建立、修改或者释放MBMS业务传输通道(例如MBMS PDU SESSION或者QoS flow或者GTP-U隧道，以及采用专用承载的方式发送该第一多播业务或者采用多播的方式发送该第一多播业务等。
例如，当对订阅第一多播业务的终端设备的数量大于第一阈值时，如果是以单播形式发送，则需要为每个终端设备建立各自专用承载分别进行发送，消耗大量的资源，为了避免造成大量资源的浪费，第一网络设备可以在订阅第一多播业务的终端设备的数量大于第 一阈值时，采用多播传输方式发送给终端设备；当订阅第一多播业务的终端设备的数量小于第二阈值时，第一网络设备可以为每个终端设备建立各自专用承载分别进行发送；当第一网络设备的小区内没有订阅第一多播业务的终端设备时，第一网络设备向核心网设备发送指示信息，用于指示核心网设备释放与第一网络设备之间的多播业务传输通道，停止第一多播业务的发送；而当第一网络设备的小区内订阅第一多播业务的终端设备的数量从无到有的时候，第一网络设备向核心网设备发送指示信息，指示核心网设备建立与第一网络设备之间的多播业务传输通道，开始第一多播业务的发送；另外也可以对已经建立的多播业务传输通道进行修改。
在图4所述的方法中，在一个小区内，终端设备订阅第一多播业务的时候，需要上报网络设备；当终端设备发生移动的时候，终端设备也需要上报网络设备，通过这样的方式，网络设备可以实时知道各个小区下订阅第一多播业务的终端设备的数量，并根据该数量维护多播业务的传输。
请参见图5，图5是本申请实施例提供的又一种通信方法，该方法包括但不限于如下步骤：
步骤S501:终端设备确定对第一业务的接收状态。
具体地，步骤S501是可选的步骤。该第一业务可以为多播业务或单播业务或者其他的业务，本方案不做限定。
具体地，所述接收状态用于指示终端设备对于第一业务的接收状态或订阅状态或感兴趣状态，包括：开始接收第一业务、正在接收第一业务、停止接收第一业务、即将接收第一业务、希望接收第一业务、对第一业务的接收感兴趣和对第一业务的接收不感兴趣中至少一项。接收状态还可以称为感兴趣或者不感兴趣，相应的，终端设备确定对第一业务感兴趣是指终端设备开始接收第一业务、正在接收第一业务、即将接收第一业务、希望接收第一业务中任意一项，终端设备确定对第一业务不感兴趣是指终端设备停止接收或者对第一业务的接收不感兴趣中任意一项。需要说明的是，终端设备在接下来的步骤中需要发送所述接收状态给网络设备，以便网络设备可以确定所述终端设备是否需要接收第一业务，进一步，网络设备可以统计对于第一业务感兴趣的终端设备个数，也就是说，所述接收状态用于指示终端设备预期接收第一业务或者不预期接收第一业务，本申请实施例不限定接收状态的具体定义和发送形式，该第一业务后续具体以第一多播业务为例进行描述。
步骤S502：终端设备向第一核心网设备或应用服务器发送第一指示信息。
具体地，该第一指示信息是终端设备经由第一网络设备中转发给第一核心网设备或应用服务器的。该第一指示信息用于指示该终端设备对第一多播业务的接收状态，该第一指示信息包括该第一多播业务的标识信息，例如可以是临时移动组标识(temporary mobile group identity，TMGI)或者其他用于标识第一多播业务的标识信息。该第一指示信息还包括：该终端设备的标识信息和第二标识信息，该终端设备的标识信息例如国际移动用户识别码(international mobile subscriber identification number，IMSI)或者临时移动用户标识(temporary mobile subscriber identity，TMSI)或者SAE临时移动用户标识(SAE-temporary mobile subscriber identity，S-TMSI)或者全球唯一临时UE标识(globally unique temporary UE  Identity，GUTI)或者小区无线网络临时标识(cell-Radio network temporary identifier，C-RNTI)等，该第二标识信息包括跟踪区标识(tracking area identity，TAI)、小区全球标识(cell global identifier，CGI)和公共陆地移动网络身份标识(public land mobile network identity，PLMN ID)中至少一项。
具体地，当终端设备处于空闲态或非激活态，第一指示信息可以承载于随机接入过程中的消息中，随机接入消息为Msg1、Msg3、Msg5或MsgA，随机接入可以是四步随机接入或者两步随机接入。当终端设备处于连接态时，第一指示信息承载于媒体接入控制控制元素(media access control control element,MAC CE)、控制协议数据单元(control protocol data unit，Control PDU)或者RRC消息中。
可选的，在步骤S502之前，本实施例还包括步骤S5021，终端设备确定经由网络设备中转向第一核心网设备或应用服务器发送第一指示信息。具体可参考上述步骤S4021，这里不再赘述。
可选的，在步骤S502之前还包括步骤S5022：网络设备指示终端设备是否上报订阅状态，相应的，终端设备根据来自网络设备的指示信息确定是否上报订阅状态。关于步骤S5022的定义，可以参考步骤S4022的相关说明，此处不再赘述。
在一种可选的方案中，终端设备对第一多播业务的接收状态发生改变的时候，终端设备经由网络设备向该第一核心网设备或应用服务器发送该第一指示信息。
具体地，该接收状态发生改变可以是订阅第一多播业务变为不订阅第一多播业务等等。
例如，假若终端设备确定对第一多播业务的接收状态为订阅第一多播业务变为不订阅第一多播业务时，则终端设备经由网络设备向该第一核心网设备或应用服务器发送第一指示信息，相应地，第一核心网设备或应用服务器根据该第一指示信息确定第一核心网设备的小区内或应用服务器的小区内订阅第一多播业务的终端设备的数量减少一个。
例如，假若终端设备确定对第一多播业务的接收状态从不订阅第一多播业务变为订阅第一多播业务，则终端设备经由网络设备向该第一核心网设备或应用服务器发送第一指示信息，相应地，该第一核心网设备或应用服务器根据该第一指示信息确定第一核心网设备的小区内或应用服务器的小区内订阅第一多播业务的终端设备的数量增加一个。
在一种可选的方案中，终端设备的RRC状态发生改变的时候，终端设备经由网络设备向该第一核心网设备或应用服务器发送该第一指示信息。
具体地，终端设备的RRC状态发生改变前，终端设备经由网络设备向该第一核心网设备或应用服务器发送该第一指示信息，和/或终端设备的RRC状态发生改变后，终端设备向经由网络设备向该第一核心网设备或应用服务器发送第一指示信息。
例如，终端设备的RRC状态从连接态转换为空闲态，则终端设备在转换前处于连接态时上报第一指示信息和/或终端设备在转换后处于空闲态时上报第一指示信息。
例如，终端设备的RRC状态从非激活态转换为连接态，则终端设备在转换前处于非激活态时上报第一指示信息，和/或终端设备在转换后处于连接态时上报第一指示信息。
在一种可选的方案中，终端设备的RRC连接发生重建或者重配或者恢复过程后，终端设备经由网络设备向该第一核心网设备或应用服务器发送该第一指示信息。
具体地，当处于连接态的终端设备时，如果出现切换失败、无线链路失败、完整性保护失败以及RRC重配置失败情况，将会触发RRC连接重建过程，那么终端设备可以在重建过程中或者重建完成以后经由网络设备向该第一核心网设备或应用服务器发送第一指示信息。当网络设备为连接态的终端设备重新配置参数时，会发送RRC重配命令，那么重配完成后终端设备可以经由网络设备向该第一核心网设备或应用服务器发送第一指示信息。当终端设备从非激活态转换为连接态时，将会触发RRC恢复过程，则终端设备可以在RRC恢复过程中或者RRC恢复过程完成以后经由网络设备向该第一核心网设备或应用服务器发送第一指示信息。
在一种可选的方案中，第一核心网设备或应用服务器接收来自该第一网络设备的第二指示信息。
具体地，该第二指示信息用于指示该终端设备到达第一核心网设备的小区，该第二指示信息包括该第一多播业务的标识信息、该终端设备的标识信息、源网络设备的标识信息和该第一网络设备的标识信息中的至少一项。可选的，该第二指示信息还可以包括到达指示信息。
具体地，若终端设备处于连接态，当正在接收第一多播业务的终端设备发生移动后，如果满足切换条件，从一个小区切换到另一个小区，切换过程如果执行路径切换流程，假若终端设备从第二网络设备的小区切换到第一网络设备的小区时，第二网络设备向第一网络设备发送切换请求消息，第一网络设备回复第二网络设备确认消息，第二网络设备收到确认消息之后，第二网络设备向第一核心网设备发送通知消息，通知第一核心网设备第二网络设备要进行切换了，第一核心网设备根据第二网络设备发送的包括第一网络设备的标识信息的指示信息寻址到第一网络设备，和第一网络设备建立连接，核心网设备释放和第二网络设备之间的连接。第一核心网设备就会确定第二网络设备下的一个终端设备切换到第一网络设备下，第一核心网设备可以通过路径切换流程得知终端设备从哪里切换到哪里，从而更新各小区终端设备的数量；若不执行路径切换流程，则切换后的第一网络设备向第一核心网设备发送第二指示信息，用于指示终端设备到达第一网络设备的小区，或者切换前的第二网络设备向第一核心网设备发送指示信息，用于指示终端设备离开第二网络设备的小区，相应地，第一核心网设备可以根据指示信息更新订阅第一多播业务的终端设备的数量。
在一种可选的方案中，在执行小区重选或者更换服务小区或者更换服务区域(比如多播业务区域，可以包含至少一个小区)之后，终端设备向第一核心网设备或应用服务器发送该第三指示信息。
具体地，该第三指示信息包括第一标识信息和该第一多播业务的标识信息，该第一标识信息包括源网络设备的标识信息和/或该终端设备的标识信息。
具体地，在执行小区重选或者更换服务小区或者更换服务区域(比如多播业务区域， 可以包含至少一个小区)之后，终端设备经由网络设备中转向第一核心网设备发送该第三指示信息，第一核心网设备接收来自终端设备的第三指示信息后，根据源网络设备的标识信息或者终端设备的标识信息(例如，非激活态的终端设备的标识信息)寻址到第二网络设备，然后第一核心网设备向第二网络设备发送通知消息，该通知消息用于通知第二网络设备订阅第一多播业务的终端设备离开第二网络设备的小区，相应的，第二网络设备更新订阅第一多播业务的终端设备的数量。
在一种可选的方案中，第一核心网设备或应用服务器向第二核心网设备发送请求信息，该请求信息用于请求该终端设备的上下文信息；第一核心网设备或应用服务器接收来自该第二核心网设备的上下文信息，该上下文信息包括该第一多播业务的标识信息。
具体地，每个核心网设备都会维护一个注册区域，假如当某个终端设备从第二核心网设备的注册区域移到第一核心网设备的注册区域的时候，会向第一核心网设备重新发起注册流程或者发起注册更新流程，第一核心网设备通过该终端设备发起的注册流程或者注册更新流程确定该终端设备是从第二核心网设备移动过来的，则第一核心网设备向第二核心网设备发送请求信息，请求该终端设备的上下文信息，第二核心网设备根据该请求信息确定某个终端设备离开，并更新第二核心网设备的小区中订阅第一多播业务终端设备的数量，第二核心网设备向第一核心网设备发送上下文信息时，上下文信息中包括该终端设备感兴趣接收或者正在接收的第一多播业务的标识信息，相应地，第一核心网设备根据该上下文信息更新第一核心网设备的小区订阅第一多播业务的终端设备的数量。
步骤S503：第一核心网设备或应用服务器接收来自终端设备的第一指示信息。
可选的，本申请实施例还包括如下步骤：
步骤S504：第一核心网设备或应用服务器根据该第一指示信息确定该终端设备的接收状态。
具体地实现方式可以参考上述实施例中的步骤S404，本步骤不再赘述。
步骤S505:第一核心网设备或应用服务器根据该终端设备的接收状态确定订阅第一多播业务的终端设备的数量。
可选地，第一核心网设备或应用服务器将终端设备的接收状态转发给第一网络设备，由第一网络设备统计确定订阅第一多播业务的终端设备的数量，由第一网络设备确定该第一多播业务的传输策略。
具体地实现方式可以参考上述实施例中的步骤S405，本步骤不再赘述。
步骤S506:第一核心网设备或应用服务器根据订阅第一多播业务的终端设备的数量确定该第一多播业务的传输策略。
具体地，订阅第一多播业务的终端设备的数量用于指代开始接收第一多播业务、正在接收第一多播业务、即将接收第一多播业务、希望(预期)接收第一多播业务、或者对第一多播业务的接收感兴趣的终端设备的数量，该传输策略与终端设备的数量相关，该传输策略用于维护多播业务的传输，该传输策略包括建立，修改，或者释放MBMS业务传输通道(例如MBMS PDU SESSION或者QoS flow或者GTP-U隧道，以及采用专用承载的方 式发送该第一多播业务或者采用多播的方式发送该第一多播业务等。
可选的，核心网设备或应用服务器将订阅第一多播业务的终端设备的数量发送给第一网络设备，由第一网络设备确定该第一多播业务的传输策略。
例如，当核心网设备的小区没有订阅第一多播业务的终端设备时，核心网设备释放与第一网络设备之间的多播业务传输通道，停止第一多播业务的发送；而当核心网设备的小区内订阅第一多播业务的终端设备的数量从无到有的时候，核心网设备建立与第一网络设备之间的多播业务传输通道，开始第一多播业务的发送；另外也可以对已经建立的多播业务传输通道进行修改。
在图5所述的方法中，在一个小区内，终端设备订阅第一多播业务的时候，需要上报核心网设备或应用服务器；当终端设备发生移动的时候，终端设备也需要上报核心网设备或应用服务器，通过这样的方式，核心网设备/应用服务器可以实时知道各个小区下的订阅第一多播业务的终端设备的数量，并根据该数量维护多播业务的传输。
请参见图6，图6是本申请实施例提供的又一种通信方法，该方法包括但不限于如下步骤：
步骤S601：第一网络设备确定第二网络设备。
具体地，第一网络设备根据来自非激活态的终端设备的标识信息确定第二网络设备。
例如，第一网络设备根据I-RNTI确定第二网络设备。
步骤S602：第一网络设备向第二网络设备发送请求信息。
具体地，该请求信息用于获取该终端设备的上下文信息。
具体地，第一网络设备向第二网络设备发送请求信息后，相应地，第二网络设备获得该请求信息后，根据该请求信息确定订阅第一多播业务的终端设备离开第二网络设备的小区，从而可以得知第二网络设备的小区中订阅第一多播业务的终端设备减少了一个。
步骤S603：第二网络设备接收来自第一网络设备的请求信息。
步骤S604：第二网络设备向第一网络设备发送终端设备的上下文信息。
具体地，该上下文信息包括第一多播业务的标识信息。
步骤S605：第一网络设备接收来自该第二网络设备终端设备的上下文信息。
具体地，该上下文信息包括该第一多播业务的标识信息。第一网络设备接收上下文信息后，根据上下文信息中的第一多播业务的标识信息，确定该终端设备订阅第一多播业务，从而第一网络设备可以根据上下文信息得知第一网络设备的小区中订阅第一多播业务的增加了一个。
在一种可选的方案中，第一网络设备配置无线接入网RAN通知区仅包括一个小区。
具体地，每个RNA都会包含一个小区列表，这里规定RNA只包含一个小区，当终端设备的RNA定时器超时或者终端设备移动出了RNA范围时，会发起RNAU过程，如果发起了RNAU过程，第一网络设备会向第二网络设备索取终端设备的上下文，第二网络设备可以确定第二网络设备的小区中订阅第一多播业务的终端设备离开，从而可以得知第二网络设备的小区中订阅第一多播业务的终端设备减少了一个。
在一种可选的方案中，第一网络设备接收来自终端设备的第一指示信息，该第一指示信息用于指示该终端设备对第一多播业务的接收状态，该第一指示信息包括该第一多播业务的标识信息。
具体实施方式如上述实施例中的步骤402，这里不再赘述。
在图6所述的方法中，针对的是处于inactive态的终端设备，对于处于空闲态的终端设备如果要接收多播业务，可选的，可以先进入inactive态，这样便可以采用该方法进行信息上报。该实施例可以尽可能重用现有的RNAU流程，完成对第一多播业务的接收感兴趣的终端设备的数量的统计，提高通信系统的通信效率，同时由于RNAU流程启用了安全保护，所以相比空闲态终端设备上报更加安全，在这种方法中可以限制空闲态终端设备进行信息上报，这样可以防止有空闲态的终端设备进行恶意上报导致网络设备统计出错。
上述详细阐述了本申请实施例的方法，下面提供了本申请实施例的装置。
请参见图7，图7是本申请实施例提供的一种通信装置的结构示意图，该通信装置可以为上述终端设备，或者终端设备中的器件。该通信装置可以包括处理单元701和通信单元702，其中，各个单元的详细描述如下。
处理单元701，用于确定对第一多播业务的接收状态；
通信单元702，用于向第一网络设备发送第一指示信息，所述第一指示信息用于指示所述终端设备对第一多播业务的接收状态，所述第一指示信息包括所述第一多播业务的标识信息。
在一种可选的方案中，所述接收状态包括：开始接收所述第一多播业务、正在接收所述第一多播业务、停止接收所述第一多播业务、即将接收所述第一多播业务、希望接收所述第一多播业务、对所述第一多播业务的接收感兴趣和对第一多播业务的接收不感兴趣中至少一项。
在又一种可选的方案中，所述第一指示信息还包括所述终端设备的标识信息。
在又一种可选的方案中，所述通信单元702，还用于接收来自所述第一网络设备的调度信息，所述调度信息用于指示所述第一指示信息的时频资源，所述调度信息承载于系统信息、无线资源控制RRC信令、随机接入消息或下行控制信息DCI中。
在又一种可选的方案中，所述处理单元701，还用于启动定时器；所述处理单元701，还用于确定所述定时器超时；所述通信单元702，还用于向所述第一网络设备发送所述第一指示信息。
在又一种可选的方案中，所述通信单元702，还用于在执行小区重选或者更换服务小区后，向所述第一网络设备发送所述第二指示信息，所述第二指示信息包括第一标识信息和所述第一多播业务的标识信息，所述第一标识信息包括源网络设备的标识信息和/或所述终端设备的标识信息。
需要说明的是，各个单元的实现及有益效果还可以对应参照图4所示的方法实施例的相应描述。
请参见图8，图8是本申请实施例提供的一种通信装置的结构示意图，该通信装置可 以为上述第一网络设备，或者第一网络设备中的器件。该通信装置可以包括通信单元801和处理单元802，其中，各个单元的详细描述如下。
通信单元801，用于接收来自终端设备的第一指示信息，所述第一指示信息用于指示所述终端设备对第一多播业务的接收状态，所述第一指示信息包括所述第一多播业务的标识信息；
处理单元802，用于根据所述第一指示信息确定所述终端设备的接收状态。
在一种可选的方案中，所述接收状态包括：开始接收所述第一多播业务、正在接收所述第一多播业务、停止接收所述第一多播业务、即将接收所述第一多播业务、希望接收所述第一多播业务、对所述第一多播业务的接收感兴趣和对第一多播业务的接收不感兴趣中至少一项。
在又一种可选的方案中，所述第一指示信息还包括所述终端设备的标识信息。
在又一种可选的方案中，所述通信单元801，还用于向所述终端设备发送调度信息，所述调度信息用于指示所述第一指示信息的时频资源，所述调度信息承载于系统信息、无线资源控制RRC信令、随机接入消息或下行控制信息DCI中。
在又一种可选的方案中，所述处理单元802，还用于根据来自所述终端设备的第二指示信息确定第二网络设备，所述第二指示信息包括所述第一多播业务的标识信息和第一标识信息，所述第一标识信息包括所述第二网络设备的标识信息和/或所述终端设备的标识信息。
在又一种可选的方案中，所述通信单元801，还用于向所述第二网络设备发送第三指示信息，所述第三指示信息用于指示所述终端设备离开，所述第三指示信息包括所述第一多播业务的标识信息和/或所述终端设备的标识信息。
在又一种可选的方案中，所述通信单元801，还用于接收来自所述第二网络设备的切换请求消息，所述切换请求消息包括第四指示信息，所述第四指示信息包括所述第一多播业务的标识信息。
在又一种可选的方案中，所述通信单元801，还用于向核心网设备发送第五指示信息，所述第五指示信息包括所述第一多播业务的标识信息、所述终端设备的标识信息和第二标识信息，所述第二标识信息包括跟踪区标识TAI、小区全球标识CGI和公共陆地移动网络身份标识PLMN ID中至少一项。
需要说明的是，各个单元的实现及有益效果还可以对应参照图4所示的方法实施例的相应描述。
请参见图9，图9是本申请实施例提供的一种通信装置900，该装置900包括处理器901和收发器903，可选的，该通信装置900还包括存储器902，所述处理器901、存储器902和收发器903通过总线904相互连接。
存储器902包括但不限于是随机存储记忆体(random access memory，RAM)、只读存储器(read-only memory，ROM)、可擦除可编程只读存储器(erasable programmable read only memory，EPROM)、或便携式只读存储器(compact disc read-only memory，CD-ROM)，该存储器902用于相关计算机程序及数据。收发器903用于接收和发送数据。
处理器901可以是一个或多个中央处理器(central processing unit，CPU)，在处理器901是一个CPU的情况下，该CPU可以是单核CPU，也可以是多核CPU。
该装置900中的处理器901读取所述存储器902中存储的计算机程序，用于执行以下操作：
确定对第一多播业务的接收状态；
向第一网络设备发送第一指示信息，所述第一指示信息用于指示所述终端设备对第一多播业务的接收状态，所述第一指示信息包括所述第一多播业务的标识信息。
在一种可选的方案中，所述接收状态包括：开始接收所述第一多播业务、正在接收所述第一多播业务、停止接收所述第一多播业务、即将接收所述第一多播业务、希望接收所述第一多播业务、对所述第一多播业务的接收感兴趣和对第一多播业务的接收不感兴趣中至少一项。
在又一种可选的方案中，所述第一指示信息还包括所述终端设备的标识信息。
在又一种可选的方案中，处理器901，用于通过收发器903接收来自所述第一网络设备的调度信息，所述调度信息用于指示所述第一指示信息的时频资源，所述调度信息承载于系统信息、无线资源控制RRC信令、随机接入消息或下行控制信息DCI中。
在又一种可选的方案中，处理器901还用于启动定时器；确定所述定时器超时；处理器901，用于通过收发器903向所述第一网络设备发送所述第一指示信息。
在又一种可选的方案中，处理器901，用于通过收发器903在执行小区重选或者更换服务小区后，向所述第一网络设备发送所述第二指示信息，所述第二指示信息包括第一标识信息和所述第一多播业务的标识信息，所述第一标识信息包括源网络设备的标识信息和/或所述终端设备的标识信息。
需要说明的是，各个操作的实现及有益效果还可以对应参照图4所示的方法实施例的相应描述。
请参见图10，图10是本申请实施例提供的一种通信装置1000，该装置1000包括处理器1001和收发器1003，可选的，该通信装置1000还包括存储器1002，所述处理器1001、存储器1002和收发器1003通过总线1004相互连接。
存储器1002包括但不限于是随机存储记忆体(random access memory，RAM)、只读存储器(read-only memory，ROM)、可擦除可编程只读存储器(erasable programmable read only memory，EPROM)、或便携式只读存储器(compact disc read-only memory，CD-ROM)，该存储器1002用于相关计算机程序及数据。收发器1003用于接收和发送数据。
处理器1001可以是一个或多个中央处理器(central processing unit，CPU)，在处理器1001是一个CPU的情况下，该CPU可以是单核CPU，也可以是多核CPU。
该装置1000中的处理器1001读取所述存储器1002中存储的计算机程序，用于执行以下操作：
接收来自终端设备的第一指示信息，所述第一指示信息用于指示所述终端设备对第一多播业务的接收状态，所述第一指示信息包括所述第一多播业务的标识信息；
根据所述第一指示信息确定所述终端设备的接收状态。
在一种可选的方案中，所述接收状态包括：开始接收所述第一多播业务、正在接收所述第一多播业务、停止接收所述第一多播业务、即将接收所述第一多播业务、希望接收所述第一多播业务、对所述第一多播业务的接收感兴趣和对第一多播业务的接收不感兴趣中至少一项。
在又一种可选的方案中，所述第一指示信息还包括所述终端设备的标识信息。
在又一种可选的方案中，所述处理器1001，还用于通过收发器1003向所述终端设备发送调度信息，所述调度信息用于指示所述第一指示信息的时频资源，所述调度信息承载于系统信息、无线资源控制RRC信令、随机接入消息或下行控制信息DCI中。
在又一种可选的方案中，所述处理器1001，还用于根据来自所述终端设备的第二指示信息确定第二网络设备，所述第二指示信息包括所述第一多播业务的标识信息和第一标识信息，所述第一标识信息包括所述第二网络设备的标识信息和/或所述终端设备的标识信息。
在又一种可选的方案中，所述处理器1001，还用于通过收发器1003向所述第二网络设备发送第三指示信息，所述第三指示信息用于指示所述终端设备离开，所述第三指示信息包括所述第一多播业务的标识信息和/或所述终端设备的标识信息。
在又一种可选的方案中，所述处理器1001，还用于通过收发器1003向核心网设备发送第五指示信息，所述第五指示信息包括所述第一多播业务的标识信息、所述终端设备的标识信息和第二标识信息，所述第二标识信息包括跟踪区标识TAI、小区全球标识CGI和公共陆地移动网络身份标识PLMN ID中至少一项。
需要说明的是，各个操作的实现及有益效果还可以对应参照图4所示的方法实施例的相应描述。
本申请实施例还提供一种芯片系统，所述芯片系统包括至少一个处理器，存储器和接口电路，所述存储器、所述收发器和所述至少一个处理器通过线路互联，所述至少一个存储器中存储有计算机程序；所述计算机程序被所述处理器执行时，实现图4所示实施例中终端设备的操作，或者实现图4所示实施例中第一网络设备的操作，实现图5所示实施例中终端设备的操作，或者实现图5所示实施例中第一核心网设备或服务器的操作，实现图6所示实施例中第一网络设备的操作，或者实现图6所示实施例中第二网络设备的操作。
本申请实施例还提供一种计算机可读存储介质，所述计算机可读存储介质中存储有计算机程序，当其在处理器上运行时，实现图4所示实施例中终端设备的操作，或者实现图4所示实施例中第一网络设备的操作，实现图5所示实施例中终端设备的操作，或者实现图5所示实施例中第一核心网设备或服务器的操作，实现图6所示实施例中第一网络设备的操作，或者实现图6所示实施例中第二网络设备的操作。
本申请实施例还提供一种通信系统，所述通信系统包括终端设备，第一核心网设备或服务器，第一网络设备和第二网络设备，当其在终端设备或网络设备或核心网设备或应用服务器上运行时，实现图4所示实施例中终端设备的操作，或者实现图4所示实施例中第一网络设备的操作，实现图5所示实施例中终端设备的操作，或者实现图5所示实施例中第一核心网设备或服务器的操作，实现图6所示实施例中第一网络设备的操作，或者实现图6所示实施例中第二网络设备的操作。
本申请实施例还提供一种计算机程序产品，当所述计算机程序产品在处理器上运行时，实现图4所示实施例中终端设备的操作，或者实现图4所示实施例中第一网络设备的操作，实现图5所示实施例中终端设备的操作，或者实现图5所示实施例中第一核心网设备或服务器的操作，实现图6所示实施例中第一网络设备的操作，或者实现图6所示实施例中第二网络设备的操作。
本领域普通技术人员可以理解实现上述实施例方法中的全部或部分流程，该流程可以由计算机程序来计算机程序相关的硬件完成，该计算机程序可存储于计算机可读取存储介质中，该计算机程序在执行时，可包括如上述各方法实施例的流程。而前述的存储介质包括：ROM或随机存储记忆体RAM、磁碟或者光盘等各种可存储计算机程序代码的介质。

Claims (30)

  1. 一种通信方法，其特征在于，所述方法适用于终端设备，包括：
    确定对第一多播业务的接收状态；
    向第一网络设备发送第一指示信息，所述第一指示信息用于指示所述终端设备对第一多播业务的接收状态，所述第一指示信息包括所述第一多播业务的标识信息。
  2. 根据权利要求1所述的方法，其特征在于，所述接收状态包括：开始接收所述第一多播业务、正在接收所述第一多播业务、停止接收所述第一多播业务、即将接收所述第一多播业务、希望接收所述第一多播业务、对所述第一多播业务的接收感兴趣和对第一多播业务的接收不感兴趣中至少一项。
  3. 根据权利要求1或2所述的方法，其特征在于，所述第一指示信息还包括所述终端设备的标识信息。
  4. 根据权利要求1-3任一项所述的方法，其特征在于，所述方法还包括：
    接收来自所述第一网络设备的调度信息，所述调度信息用于指示所述第一指示信息的时频资源，所述调度信息承载于系统信息、无线资源控制RRC信令、随机接入消息或下行控制信息DCI中。
  5. 根据权利要求1-4任一项所述的方法，其特征在于，所述向第一网络设备发送第一指示信息之后，所述方法还包括：
    启动定时器；
    确定所述定时器超时；
    向所述第一网络设备发送所述第一指示信息。
  6. 根据权利要求1-5任一项所述的方法，其特征在于，所述方法还包括：
    执行小区重选或者更换服务小区后，向所述第一网络设备发送所述第二指示信息，所述第二指示信息包括第一标识信息和所述第一多播业务的标识信息，所述第一标识信息包括源网络设备的标识信息和/或所述终端设备的标识信息。
  7. 一种通信方法，其特征在于，所述方法适用于第一网络设备，包括：
    接收来自终端设备的第一指示信息，所述第一指示信息用于指示所述终端设备对第一多播业务的接收状态，所述第一指示信息包括所述第一多播业务的标识信息；
    根据所述第一指示信息确定所述终端设备的接收状态。
  8. 根据权利要求7所述的方法，其特征在于，所述接收状态包括：开始接收所述第一多播业务、正在接收所述第一多播业务、停止接收所述第一多播业务、即将接收所述第一 多播业务、希望接收所述第一多播业务、对所述第一多播业务的接收感兴趣和对第一多播业务的接收不感兴趣中至少一项。
  9. 根据权利要求7或8所述的方法，其特征在于，所述第一指示信息还包括所述终端设备的标识信息。
  10. 根据权利要求7-9任一项所述的方法，其特征在于，所述方法还包括：
    向所述终端设备发送调度信息，所述调度信息用于指示所述第一指示信息的时频资源，所述调度信息承载于系统信息、无线资源控制RRC信令、随机接入消息或下行控制信息DCI中。
  11. 根据权利要求7-10任一项所述的方法，其特征在于，所述方法还包括：
    根据来自所述终端设备的第二指示信息确定第二网络设备，所述第二指示信息包括所述第一多播业务的标识信息和第一标识信息，所述第一标识信息包括所述第二网络设备的标识信息和/或所述终端设备的标识信息。
  12. 根据权利要求7-11任一项所述的方法，其特征在于，所述方法还包括：
    向所述第二网络设备发送第三指示信息，所述第三指示信息用于指示所述终端设备离开，所述第三指示信息包括所述第一多播业务的标识信息和/或所述终端设备的标识信息。
  13. 根据权利要求7-10任一项所述的方法，其特征在于，所述方法还包括：
    接收来自所述第二网络设备的切换请求消息，所述切换请求消息包括第四指示信息，所述第四指示信息包括所述第一多播业务的标识信息。
  14. 根据权利要求7-10任一项所述的方法，其特征在于，所述方法还包括：
    向核心网设备发送第五指示信息，所述第五指示信息包括所述第一多播业务的标识信息、所述终端设备的标识信息和第二标识信息，所述第二标识信息包括跟踪区标识TAI、小区全球标识CGI和公共陆地移动网络身份标识PLMN ID中至少一项。
  15. 一种通信装置，其特征在于，包括：
    处理单元，用于确定对第一多播业务的接收状态；
    通信单元，用于向第一网络设备发送第一指示信息，所述第一指示信息用于指示所述终端设备对第一多播业务的接收状态，所述第一指示信息包括所述第一多播业务的标识信息。
  16. 根据权利要求15所述的装置，其特征在于，所述接收状态包括：开始接收所述第一多播业务、正在接收所述第一多播业务、停止接收所述第一多播业务、即将接收所述第一多播业务、希望接收所述第一多播业务、对所述第一多播业务的接收感兴趣和对第一多 播业务的接收不感兴趣中至少一项。
  17. 根据权利要求15或16所述的装置，其特征在于，所述第一指示信息还包括所述终端设备的标识信息。
  18. 根据权利要求15-17任一项所述的装置，其特征在于，
    所述通信单元，还用于接收来自所述第一网络设备的调度信息，所述调度信息用于指示所述第一指示信息的时频资源，所述调度信息承载于系统信息、无线资源控制RRC信令、随机接入消息或下行控制信息DCI中。
  19. 根据权利要求15-18任一项所述的装置，其特征在于，
    所述处理单元，还用于启动定时器；
    所述处理单元，还用于确定所述定时器超时；
    所述通信单元，还用于向所述第一网络设备发送所述第一指示信息。
  20. 根据权利要求15-19任一项所述的装置，其特征在于，
    所述通信单元，还用于在执行小区重选或者更换服务小区后，向所述第一网络设备发送所述第二指示信息，所述第二指示信息包括第一标识信息和所述第一多播业务的标识信息，所述第一标识信息包括源网络设备的标识信息和/或所述终端设备的标识信息。
  21. 一种通信装置，其特征在于，包括：
    通信单元，用于接收来自终端设备的第一指示信息，所述第一指示信息用于指示所述终端设备对第一多播业务的接收状态，所述第一指示信息包括所述第一多播业务的标识信息；
    处理单元，用于根据所述第一指示信息确定所述终端设备的接收状态。
  22. 根据权利要求21所述的装置，其特征在于，所述接收状态包括：开始接收所述第一多播业务、正在接收所述第一多播业务、停止接收所述第一多播业务、即将接收所述第一多播业务、希望接收所述第一多播业务、对所述第一多播业务的接收感兴趣和对第一多播业务的接收不感兴趣中至少一项。
  23. 根据权利要求21或22所述的装置，其特征在于，所述第一指示信息还包括所述终端设备的标识信息。
  24. 根据权利要求21-23任一项所述的装置，其特征在于，
    所述通信单元，还用于向所述终端设备发送调度信息，所述调度信息用于指示所述第一指示信息的时频资源，所述调度信息承载于系统信息、无线资源控制RRC信令、随机接入消息或下行控制信息DCI中。
  25. 根据权利要求21-24任一项所述的装置，其特征在于，
    所述处理单元，还用于根据来自所述终端设备的第二指示信息确定第二网络设备，所述第二指示信息包括所述第一多播业务的标识信息和第一标识信息，所述第一标识信息包括所述第二网络设备的标识信息和/或所述终端设备的标识信息。
  26. 根据权利要求21-25任一项所述的装置，其特征在于，
    所述通信单元，还用于向所述第二网络设备发送第三指示信息，所述第三指示信息用于指示所述终端设备离开，所述第三指示信息包括所述第一多播业务的标识信息和/或所述终端设备的标识信息。
  27. 根据权利要求21-24任一项所述的装置，其特征在于，
    所述通信单元，还用于接收来自所述第二网络设备的切换请求消息，所述切换请求消息包括第四指示信息，所述第四指示信息包括所述第一多播业务的标识信息。
  28. 根据权利要求21-24任一项所述的装置，其特征在于，
    所述通信单元，还用于向核心网设备发送第五指示信息，所述第五指示信息包括所述第一多播业务的标识信息、所述终端设备的标识信息和第二标识信息，所述第二标识信息包括跟踪区标识TAI、小区全球标识CGI和公共陆地移动网络身份标识PLMN ID中至少一项。
  29. 一种通信装置，其特征在于，包括至少一个处理器和收发器，其中，所述至少一个处理器用于通过所述收发器与其它装置通信，所述存储器用于存储计算机程序，所述处理器调用所述计算机程序，用于执行如权利要求1至14中任一项所述的方法。
  30. 一种计算机可读存储介质，其特征在于，所述计算机存储介质存储有计算机程序，所述计算机程序当被处理器执行时使所述处理器执行如权利要求1-14中任一项所述的方法。
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