WO2021164763A1 - 模式切换的方法及设备 - Google Patents

模式切换的方法及设备 Download PDF

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Publication number
WO2021164763A1
WO2021164763A1 PCT/CN2021/077043 CN2021077043W WO2021164763A1 WO 2021164763 A1 WO2021164763 A1 WO 2021164763A1 CN 2021077043 W CN2021077043 W CN 2021077043W WO 2021164763 A1 WO2021164763 A1 WO 2021164763A1
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Prior art keywords
mode switching
user terminal
information
message
network function
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PCT/CN2021/077043
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English (en)
French (fr)
Inventor
谢振华
柯小婉
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维沃移动通信有限公司
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Application filed by 维沃移动通信有限公司 filed Critical 维沃移动通信有限公司
Priority to KR1020227032016A priority Critical patent/KR20220143713A/ko
Priority to JP2022549105A priority patent/JP2023515393A/ja
Priority to BR112022016076A priority patent/BR112022016076A2/pt
Priority to EP21757124.9A priority patent/EP4109966A4/en
Publication of WO2021164763A1 publication Critical patent/WO2021164763A1/zh
Priority to US17/878,326 priority patent/US20220377507A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0007—Control or signalling for completing the hand-off for multicast or broadcast services, e.g. MBMS
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00—Network arrangements, protocols or services for addressing or naming
    • H04L61/50—Address allocation
    • H04L61/5069—Address allocation for group communication, multicast communication or broadcast communication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/02—Arrangements for optimising operational condition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/18—Selecting a network or a communication service
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/40—Connection management for selective distribution or broadcast
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/11—Allocation or use of connection identifiers

Definitions

  • the embodiment of the present invention relates to the field of communication technology, and in particular to a method and device for mode switching.
  • MBMS Multimedia Broadcast/Multicast Service
  • the mobility of the user may cause the user to move from the current MBMS-covered cell to another cell that is not covered by the MBMS, and an inter-cell handover is required. If the user is interested in the current MBMS or is receiving the current MBMS, the user needs to consider the issue of switching between the multicast bearer and the unicast bearer of the MBMS service between the multicast cell and the unicast cell when switching between cells. .
  • An object of the embodiments of the present invention is to provide a method and device for mode switching to solve the problem of switching between multicast and unicast modes.
  • an embodiment of the present invention provides a method for mode switching, which is applied to the first network function, and includes:
  • the parameters of the mode switching operation include first information, and the first information includes a mode switching command;
  • the mode switching command is used to notify the target party to perform a mode switching operation.
  • an embodiment of the present invention provides a method for mode switching, which is applied to a second network function, and includes:
  • the mode switching operation is invoked by the first network function, and the parameters of the mode switching operation include first information, and the first information includes: a mode switching command;
  • the parameter of the service operation includes the content of the mode switching command, or sending the mode switching command to the user terminal, or sending the mode switching command to the wireless access network node .
  • an embodiment of the present invention provides a method for mode switching, which is applied to a user terminal, and includes:
  • Send a first message to the network side where the first message is used by the user terminal to establish a service data transmission unicast channel or a multicast channel with the network side, or used by the user terminal to send a second message to the application server Message, the second message is used to notify the application server to send service data to the user terminal.
  • an embodiment of the present invention provides a network function, which is a first network function and includes:
  • the first invoking module is used to invoke the mode switching operation of the second network function, the parameters of the mode switching operation include first information, and the first information includes the mode switching command; wherein, the mode switching command is used to notify the target Perform the mode switching operation.
  • embodiments of the present invention provide a network function, which is a second network function, and includes:
  • the second invoking module is used to invoke the mode switching operation by the first network function, the parameters of the mode switching operation include first information, and the first information includes: a mode switching command;
  • the first sending module is used to call the service operation of the fifth network function, the parameter of the service operation includes the content of the mode switching command, or the mode switching command is sent to the user terminal, or the mode switching command is sent to the wireless access network.
  • the node sends the mode switching command.
  • an embodiment of the present invention provides a user terminal, including:
  • the receiving module is used to receive the mode switching command on the network side
  • the second sending module is configured to send a first message to the network side, where the first message is used to establish a service data transmission unicast channel or a multicast channel with the network side, or send a second message to the application server, so The second message is used to notify the application server to send service data to the user terminal.
  • an embodiment of the present invention provides a communication device, including: a processor, a memory, and a program stored on the memory and running on the processor, and the program is implemented when the processor is executed It includes the steps of the mode switching method as described in the first aspect, the second aspect, or the third aspect.
  • an embodiment of the present invention provides a computer-readable storage medium having a computer program stored on the computer-readable storage medium. The steps of the mode switching method described in the third aspect.
  • the network function in the core network can initiate the mode switching operation of the multicast service or the unicast service, so that the user can switch between the multicast bearer and the unicast bearer in the 5G network, and improve the reliability of the communication system sex.
  • FIG. 1 is one of the flowcharts of the mode switching method according to the embodiment of the present invention.
  • FIG. 2 is the second flowchart of the mode switching method according to the embodiment of the present invention.
  • FIG. 3 is the third flowchart of the mode switching method according to the embodiment of the present invention.
  • FIG. 4 is one of the flowcharts of the core network performing broadcast mode switching according to the embodiment of the present invention.
  • FIG. 5 is the second flowchart of the core network performing broadcast mode switching according to the embodiment of the present invention.
  • FIG. 6 is the third flowchart of the core network performing broadcast mode switching according to the embodiment of the present invention.
  • FIG. 7 is the fourth flow chart of the core network performing broadcast mode switching according to the embodiment of the present invention.
  • FIG. 8 is the fifth flowchart of the core network performing broadcast mode switching according to the embodiment of the present invention.
  • FIG. 9 is a sixth flowchart of the core network performing broadcast mode switching according to an embodiment of the present invention.
  • FIG. 10 is the seventh flowchart of the core network performing broadcast mode switching according to the embodiment of the present invention.
  • FIG. 11 is a schematic diagram of a first network function according to an embodiment of the present invention.
  • FIG. 12 is a schematic diagram of a second network function according to an embodiment of the present invention.
  • FIG. 13 is a schematic diagram of a user terminal according to an embodiment of the present invention.
  • Fig. 14 is a schematic diagram of a communication device according to an embodiment of the present invention.
  • words such as “exemplary” or “for example” are used to represent examples, illustrations, or illustrations. Any embodiment or design solution described as “exemplary” or “for example” in the embodiments of the present invention should not be construed as being more preferable or advantageous than other embodiments or design solutions. To be precise, words such as “exemplary” or “for example” are used to present related concepts in a specific manner.
  • the network function may be realized by a network entity device, or may also be realized by an instance in a virtual machine, that is, the network function may be a physical device or a virtual device.
  • LTE Long Time Evolution
  • LTE-A Long Time Evolution
  • CDMA Code Division Multiple Access
  • TDMA Time Division Multiple Access
  • FDMA Frequency Division Multiple Access
  • OFDMA Orthogonal Frequency Division Multiple Access
  • SC-FDMA Single Carrier Frequency Single-carrier Frequency-Division Multiple Access
  • the terms “system” and “network” are often used interchangeably.
  • the CDMA system can implement radio technologies such as CDMA2000 and Universal Terrestrial Radio Access (UTRA).
  • UTRA includes Wideband Code Division Multiple Access (WCDMA) and other CDMA variants.
  • the TDMA system can implement radio technologies such as the Global System for Mobile Communication (GSM).
  • OFDMA system can realize such as Ultra Mobile Broadband (UMB), Evolved UTRA (Evolution-UTRA, E-UTRA), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDM, etc. Radio technology.
  • UMB Ultra Mobile Broadband
  • Evolution-UTRA Evolved UTRA
  • E-UTRA IEEE 802.11
  • WiMAX IEEE 802.16
  • IEEE 802.20 Flash-OFDM
  • Flash-OFDM Flash-OFDM
  • LTE and more advanced LTE are new UMTS versions that use E-UTRA.
  • UTRA, E-UTRA, UMTS, LTE, LTE-A, and GSM are described in documents from an organization named "3rd Generation Partnership Project” (3GPP).
  • CDMA2000 and UMB are described in documents from an organization named “3rd Generation Partnership Project 2" (3GPP2).
  • the techniques described in this article can be used for the systems and radio technologies mentioned above, as well as other systems and radio technologies.
  • the user terminal provided in the embodiment of the present invention may be a mobile phone, a tablet computer, a notebook computer, an ultra-mobile personal computer (Ultra-Mobile Personal Computer, UMPC), a netbook or a personal digital assistant (Personal Digital Assistant, PDA), and a mobile Internet device (Mobile Internet Device (MID), Wearable Device (Wearable Device), or in-vehicle equipment, etc.
  • Ultra-Mobile Personal Computer Ultra-Mobile Personal Computer
  • PDA Personal Digital Assistant
  • MID Mobile Internet Device
  • Wearable Device Wearable Device
  • in-vehicle equipment etc.
  • an embodiment of the present invention provides a method for mode switching.
  • the execution subject of the method may be a first network function, and the first network function is a network function in the core network, such as a multicast broadcast service function (Multicast Broadcast).
  • Multicast Broadcast Multicast Broadcast
  • Service Function, MBSF including: step 101.
  • Step 101 Invoke a mode switching operation of a second network function, the parameters of the mode switching operation include first information, and the first information includes a mode switching command;
  • the mode switching command is used to notify the target party to perform a mode switching operation, where the mode switching operation includes: switching from a unicast mode to a multicast mode, and switching from a multicast mode to a unicast mode.
  • the target party may be a user terminal or a wireless access network node (for example, a base station). That is, the user terminal can switch from unicast mode to multicast mode based on the trigger of the core network element, or switch from multicast mode to unicast mode, or the base station can switch from unicast mode to multicast based on the trigger of the core network element. Mode, or switch from multicast mode to unicast mode.
  • the second network function may be a multicast broadcast session management function (MB-SMF) or an access and mobility management function (Access and Mobility Management Function, AMF), but of course it is not Limited to this.
  • M-SMF multicast broadcast session management function
  • AMF Access and Mobility Management Function
  • the method before step 101, the method further includes:
  • the mode switching operation of invoking the second network function is executed, for example, from The mode switching operation of switching from the unicast mode to the multicast mode, or the mode switching operation of switching from the multicast mode to the unicast mode.
  • the number of users of the foregoing multicast service may be the total number of users of the multicast service.
  • the number of users in the foregoing multicast service area may be the number of users in the multicast service tracking area.
  • the above-mentioned service operation being invoked includes: the multicast service operation is invoked (for example, the application server invokes the MBSF business operation, or the MB-SMF invokes the MBSF business operation) or the application server invokes the unicast business operation.
  • the mode switching operation For example, if the total number of users of the multicast service, or the number of users in the multicast service area is greater than the preset value, or the multicast service operation is invoked, perform the mode switching operation of invoking the second network function to switch from the unicast mode It is a multicast mode.
  • the unicast service operation executes the mode switching operation of invoking the second network function, and switch from the multicast mode Switch to unicast mode.
  • the first information further includes one or more of the following:
  • User Information such as User ID, such as Subscriber Permanent Identifier (SUPI) or International Mobile Subscriber Identity (IMSI);
  • SUPI Subscriber Permanent Identifier
  • IMSI International Mobile Subscriber Identity
  • the AMF identifier for example, the Globally Unique AMF ID (GUAMI)
  • the method before step 101, further includes: querying the unified data management function (Unified Data Manager, UDM) for AMF information.
  • UDM Unified Data Manager
  • the mode switching command includes: service information (or called multicast service information), or session information;
  • business information is used for any one of the following:
  • the user terminal sends a first message to the network side, where the first message is used for the user terminal to establish a service data transmission unicast channel or a multicast channel with the network side;
  • the user terminal sends a second message to the application server, where the second message is used to notify the application server to send service data to the user terminal;
  • the session information is used for any one of the following:
  • the radio access network node (e.g., base station) sends a third message to the core network, and the third message radio access network node is used to communicate with a third network function (e.g., multicast broadcast user plane function (MB) -UPF)) Establish or maintain a service data transmission multicast channel; or, the third message is used by the radio access network node to establish service data with a fourth network function (for example, User Plane Function (UPF)) Transmission unicast channel;
  • a third network function e.g., multicast broadcast user plane function (MB) -UPF)
  • MB multicast broadcast user plane function
  • UPF User Plane Function
  • the radio access network node does not send a message to maintain a service data transmission multicast channel with a third network function (for example, MB-UPF).
  • a third network function for example, MB-UPF
  • the above unicast channel is a core network user plane function (such as UPF) to establish a service data transmission channel with each user terminal to send service data to each user terminal, including: the core network user plane function and the channel between the wireless access network nodes and The channel between the wireless access network node and the user terminal.
  • a core network user plane function such as UPF
  • the above-mentioned multicast channel includes the core network user plane function (such as MB-UPF) and the service data transmission channel between the radio access network nodes.
  • This channel allows the core network user plane function to send service data to each radio access network node separately.
  • the wireless access network node sends service data to all user terminals covered by the wireless access network node, and the channel is shared by all user terminals of the service under the wireless access node.
  • the mode switching command includes one or more of the following:
  • TMGI Temporary Mobile Group Identity
  • Multicast address such as IP multicast address
  • Protocol data unit session ID (PDU session ID).
  • the network function in the core network can initiate the mode switching operation of the multicast service or the unicast service.
  • an embodiment of the present invention also provides a method for mode switching.
  • the execution subject of the method may be a second network function, and the second network function is a network function in the core network, such as MB-SMF or AMF, including :
  • Step 201 The mode switching operation is invoked by the first network function, the parameters of the mode switching operation include first information, and the first information includes: a mode switching command
  • the first network function is a network function in the core network, such as MBSF.
  • Step 202 Invoke the service operation of the fifth network function.
  • the service operation parameter includes the content of the mode switching command, or the mode switching command is sent to the user terminal, or the mode switching command is sent to the radio access network node. Mode switching command.
  • the fifth network function is AMF.
  • the first information may further include one or more of the following:
  • User information such as user identification, such as SUPI or IMSI;
  • the AMF identifier for example, GUAMI.
  • the method may further include: querying the unified data management function for information about the AMF serving the user terminal.
  • the network function in the core network can initiate the mode switching operation of the multicast service or the unicast service, so that the user can switch between the multicast bearer and the unicast bearer in the 5G network, and improve the reliability of the communication system sex.
  • an embodiment of the present invention also provides a method for mode switching.
  • the execution subject of the method may be a user terminal, and includes: step 301 and step 302.
  • Step 301 Receive a mode switching command from the network side
  • the mode switching command is acquired by the second network function through a mode switching operation parameter invoked by the first network function.
  • the mode switching command includes: service information; wherein the service information is used for any one of the following: the user terminal sends a first message to the network side, and the first message is used for the user terminal and the network
  • the network side establishes a service data transmission unicast channel or a multicast channel; the user terminal sends a second message to the application server, and the second message is used to notify the application server to send service data to the user terminal.
  • the mode switching command includes one or more of the following: TMGI; multicast address.
  • Step 302 Send a first message to the network side, where the first message is used for the user terminal to establish a service data transmission unicast channel or multicast channel with the network side, or for the user terminal to send a second message to the application server The second message is used to notify the application server to send service data to the user terminal.
  • the first message includes: service information.
  • the service information is used for: the user terminal sends a first message to the network, and the first message is used for establishing a service data transmission unicast channel or a multicast channel with the network, or,
  • the service information is used for: the user terminal sends a second message to an application server (for example, a content provider), and the second message is used for notifying the application server to send service data to the user terminal.
  • an application server for example, a content provider
  • the service information includes one or more of the following: (1) TMGI; multicast address, such as IP multicast address.
  • the user terminal can switch between the multicast bearer and the unicast bearer based on the mode switching operation of the multicast service or the unicast service initiated by the network function in the core network, thereby improving the reliability of the communication system.
  • the first network element is MBSF
  • the second network element is a radio access network node
  • the third network element is MB-UPF
  • the fourth network element is MB-UPF.
  • UPF the fifth network element is MB-SMF.
  • MBSF When MBSF decides to switch mode, it needs to notify MB-SMF to establish a shared channel between MB-UPF and RAN node (unicast to multicast) or notify the user terminal (User Equipment, UE) to establish a protocol data unit session (PDU session) ( Multicast to unicast), so that MB-UPF can forward multicast data through a shared channel, or perform data forwarding (unicast) for each user terminal (per UE) through a PDU session between the UPF and the UE.
  • PDU session Multicast to unicast
  • FIG. 4 illustrates the process of the core network performing multicast mode switching, including steps: 401-409.
  • Step 401 MBSF decides to trigger mode switching based on the number of multicast service users, or the number of multicast service users in the same area, or the service operation is invoked, for example, the content provider (Content Provider) invokes the service operation of MBSF, or MB- SMF invoked the business operations of MBSF;
  • the content provider Content Provider
  • MB- SMF MB- SMF
  • MB-UPF After MB-UPF receives a multicast data message, it replaces the destination address (multicast address) of the data message with the address of each user terminal in the multicast service and then forwards it (that is, using unicast mode). The data message will be routed to the UPF that has established a session connection with the corresponding user terminal, and the UPF will then forward the data message to the user terminal.
  • MBSF decides to switch the unicast mode to the multicast mode based on the number of users of the multicast service, or the number of users of the multicast service in one or more areas (such as tracking areas, or base station nodes, etc.).
  • Step 402 MBSF obtains information of AMF serving the user from UDM.
  • MBSF requests UDM for information about AMF serving a certain user terminal, such as an AMF identifier (for example, Globally Unique AMF ID (GUAMI)).
  • AMF identifier for example, Globally Unique AMF ID (GUAMI)
  • Step 403 MBSF invokes the mode switching operation of MB-SMF
  • the Nmbsmf_ModeSwitch operation is called to carry a mode switching command sent to the base station.
  • the mode switching command carries session information, such as TMGI or IP multicast address, which is used to notify the base station to establish a shared data channel with MB-UPF;
  • SUPI Subscribe Permanent Identifier
  • IMSI International Mobile Subscriber Identity
  • AMF information such as GUAMI.
  • Step 404 MB-SMF invokes the AMF multicast session operation
  • MB-SMF requests Unified Data Manager (UDM) for information about AMF serving a certain user terminal, such as GUAMI, MB-SMF invokes Namf_MBSession operation of AMF, and carries user identification and/or mode switching commands.
  • UDM Unified Data Manager
  • Step 405 The AMF forwards the mode switching command to the base station (gNB) serving the user terminal.
  • gNB base station
  • Step 406 The base station reserves multicast resources and sends a mode switch response to the AMF;
  • the mode switching response may carry one or more of the following: (1) information of the base station; (2) channel identification information.
  • the base station If the base station has established a shared data channel with the MB-UPF, it directly sends the information of the existing shared channel to the AMF, or sends an indication that the channel does not need to be established, or does not send a message.
  • Step 407 After receiving the mode switching response sent by the base station, the AMF returns the multicast session operation result to the MB-SMF.
  • the multicast session operation result may carry the received mode switching response.
  • Step 408 Perform connection update between MB-SMF and MB-UPF;
  • MB-SMF judges that MB-UPF needs to be updated through the mode switch response (that is, establishes a shared channel between MB-UPF and the corresponding base station), and orders MB-UPF to update the multicast session, including informing the address information of the base station corresponding to MB-UPF and Channel identification.
  • Step 409 The MB-SMF may return the result of the mode switching operation to the MBSF.
  • MB-UPF can forward the received multicast data message to each shared channel with the base station.
  • FIG. 5 the figure illustrates the process of the core network performing multicast mode switching, including steps: 501-508.
  • Steps 501 to 502 The descriptions of steps 401 to 402 in the first embodiment are the same.
  • Step 503 MBSF calls the AMF mode switching operation, such as Namf_Communicatioon_N1N2MessageTransfer, which carries a mode switching command sent to the base station system.
  • the mode switching command carries session information, such as TMGI, which is used to notify the base station system to establish a shared data channel with MB-UPF , Which can carry MB-UPF address information, and can also carry user identification, such as SUPI or IMSI.
  • Steps 504 to 508 same as the description of steps 405 to 409 in the first embodiment.
  • FIG. 6 illustrates the process of the core network performing multicast mode switching, including steps: 601-608.
  • Steps 601 to 602 The descriptions of steps 401 to 402 in the first embodiment are the same.
  • Step 603 MBSF calls the AMF mode switching operation, such as Namf_Communicatioon_N1N2MessageTransfer, which carries the mode switching command sent to the user terminal.
  • the mode switching command carries service information, such as TMGI, which is used to notify the user terminal to initiate the multicast session establishment process, and can also carry User ID, such as SUPI or IMSI.
  • Step 604 The AMF forwards the mode switching command to the user terminal.
  • Step 605 The user terminal initiates a multicast session establishment request, such as sending a PDU session establishment message carrying TMGI or IP multicast address to trigger the multicast session establishment process.
  • MBSF notifies MB-SMF to establish base station node and MB-UPF Shared data channel between.
  • FIG 7 the figure illustrates the process of the core network performing multicast mode switching, including steps 701-708.
  • Step 701 MBSF decides to trigger mode switching based on the number of multicast service users, or the number of multicast service users in the same area, or the service operation is invoked, for example, Content Provider invokes MBSF business operation, or MB-SMF invokes MBSF Business operation
  • MB-UPF After MB-UPF receives the multicast data message, it forwards the data messages to the base station (multicast mode) through the shared channel with each base station one by one, and then forwards the data messages to each user terminal by the base station.
  • MBSF decides to switch the multicast mode to unicast based on the number of users of the multicast service, or the number of users of the multicast service in one or more areas (such as one or more tracking areas, or one or more base station nodes, etc.) .
  • Step 702 MBSF obtains information of AMF serving the user from UDM;
  • MBSF requests UDM for information about AMF serving a certain user terminal, such as AMF identification (GUAMI).
  • GUI AMF identification
  • Step 703 MBSF invokes the mode switching operation of MB-SMF serving the user terminal;
  • calling the Nmbsmf_ModeSwitch operation carries a mode switching command sent to the user terminal.
  • the mode switching command can carry service information, such as TMGI or IP multicast address, to notify the user terminal to establish a unicast data connection with the core network.
  • AMF information such as AMF identification (GUAMI).
  • Step 704 MB-SMF invokes the AMF multicast session operation
  • MB-SMF requests UDM for information about AMF serving a certain user terminal, such as an AMF identifier (GUAMI), and MB-SMF invokes AMF multicast session operations, such as invoking Namf_MBSession operations.
  • GUI AMF identifier
  • the multicast session operation carries the user identification and/or the mode switching command.
  • Step 705 The AMF forwards the mode switching command to the user terminal.
  • Step 706 The user terminal initiates a session establishment request to the core network
  • the user terminal sends a request message, and the request message includes one or more of the following:
  • PDU session establishment PDU session establishment
  • Multicast session establishment request message for example, MB Service Request
  • the request message can carry service information, such as TMGI or IP multicast address.
  • Step 707 MB-SMF invokes the multicast operation of MBSF
  • MB-SMF calls MBSF's multicast operation during the establishment of a multicast session, such as calling the Nmbsf_UserAuth operation, carrying service information, such as TMGI or IP multicast address.
  • Step 708 The MBSF judges that the mode switching operation has been performed for the multicast service, and returns the result of the multicast operation to the MB-SMF.
  • the multicast operation result may carry a unicast mode indication, or the mode indication may not be carried to indicate the use of the unicast mode.
  • FIG 8 the figure illustrates the process of the core network performing multicast mode switching, including steps 801-808.
  • Steps 801 to 802 The descriptions of steps 701 to 702 in the fourth embodiment are the same.
  • Step 803 MBSF calls the AMF mode switching operation, such as calling Namf_Communicatioon_N1N2MessageTransfer, carrying the mode switching command sent to the user terminal.
  • the mode switching command carries service information, such as TMGI, which is used to notify the user terminal to use a unicast data connection, and it can also carry User ID, such as SUPI or IMSI.
  • Steps 804 to 807 The descriptions of steps 705 to 708 in the fourth embodiment are the same.
  • FIG 9 the figure illustrates the process of the core network performing multicast mode switching, including steps 901-907.
  • Steps 901 to 902 The descriptions of steps 701 to 702 in the fourth embodiment are the same.
  • Step 903 MBSF invokes the AMF mode switching operation, such as Namf_Communicatioon_N1N2MessageTransfer, which carries the mode switching command sent to the base station system.
  • the mode switching command carries session information, such as PDU session ID, or TMGI, or IP multicast address, used to notify the base station
  • the system initiates a session update process to establish a unicast data connection between the user terminal and the core network, and can also carry a user identification, such as SUPI or IMSI.
  • Step 904 The AMF forwards the mode switching command to the base station node serving the user.
  • Step 905 The base station node initiates a session update process, such as sending a message carrying the PDU session ID and TMGI to the AMF.
  • Step 906 MB-SMF calls MBSF's multicast operation, such as Nmbsf_UserAuth operation, to carry service information, such as TMGI or IP multicast address, during the process of performing the multicast session update.
  • MBSF's multicast operation such as Nmbsf_UserAuth operation
  • Step 907 The MBSF judges that the mode switching operation has been performed for the multicast service, and returns the result of the multicast operation to the MB-SMF, carrying the unicast mode indication or not carrying the mode indication to indicate the use of the unicast mode.
  • FIG. 10 illustrates the process of the core network performing multicast mode switching, including steps 1001-1005.
  • Steps 1001 to 1002 same as the description of steps 701 to 702 in the fourth embodiment.
  • Step 1003 MBSF calls the AMF mode switching operation, such as Namf_Communicatioon_N1N2MessageTransfer, which carries the mode switching command sent to the user terminal.
  • the mode switching command carries service information, such as TMGI or IP multicast address, which is used to notify the user terminal to use a unicast data connection. It can also carry user identification, such as SUPI or IMSI.
  • Step 1005 The user terminal sends a mode switching notification to the content provider (Content Provider), which is used to notify the content provider to send service data with the user terminal as the target.
  • Content provider Content Provider
  • an embodiment of the present invention also provides a first network function, and the first network function 1100 includes:
  • the first invoking module 1101 is used to invoke the mode switching operation of the second network function, the parameters of the mode switching operation include first information, and the first information includes the mode switching command; wherein, the mode switching command is used to notify The target performs a mode switching operation.
  • the first network function 1100 further includes:
  • the judging module is used to execute the mode switching operation of calling the second network function based on the number of users of the multicast service, or the number of users in the multicast service area, or the service operation is invoked.
  • the first information further includes one or more of the following: user information, information about the AMF serving the user terminal.
  • the first network function 1100 further includes: a first query module, configured to query the unified data management function for AMF information.
  • the target party is a user terminal or a radio access network node.
  • the mode switching command includes: service information or session information;
  • business information is used for any one of the following:
  • the user terminal sends a first message to the network side, where the first message is used for the user terminal to establish a service data transmission unicast channel or a multicast channel with the network side;
  • the user terminal sends a second message to the application server, where the second message is used to notify the application server to send service data to the user terminal;
  • the session information is used for any one of the following:
  • the radio access network node sends a third message to the core network, and the third message is used by the radio access network node to establish or maintain a service data transmission multicast channel with the third network function; or the radio access network The node establishes a service data transmission unicast channel with the fourth network function;
  • the radio access network node does not send a message to maintain a service data transmission multicast channel with the third network function.
  • the mode switching command includes one or more of the following:
  • Multicast address such as IP multicast address
  • the first network function provided by the embodiment of the present invention can execute the method embodiment shown in FIG.
  • an embodiment of the present invention also provides a second network function, and the second network function 1200 includes:
  • the second calling module 1201 is configured to be called by a first network function for a mode switching operation, the parameters of the mode switching operation include first information, and the first information includes: a mode switching command;
  • the first sending module 1202 is used to call the service operation of the fifth network function, and the parameter of the service operation includes the content of the mode switching command, or sending the mode switching command to the user terminal, or to the wireless access
  • the network node sends the mode switching command.
  • the first information further includes one or more of the following: user information, information serving the access and mobility management functions of the user terminal.
  • the second network function 1200 further includes:
  • the second query module is used to query the unified data management function for information about the access and mobility management functions that serve the user terminal.
  • the second network function provided in the embodiment of the present invention can execute the method embodiment shown in FIG.
  • an embodiment of the present invention also provides a user terminal, and the user terminal 1300 includes:
  • the receiving module 1301 is used to receive a mode switching command from the network side;
  • the second sending module 1302 is configured to send a first message to the network side, where the first message is used for the user terminal to establish a service data transmission unicast channel or a multicast channel with the network side, or send a second message to the application server Message, the second message is used to notify the application server to send service data to the user terminal.
  • the mode switching command is acquired by the second network function through a mode switching operation parameter invoked by the first network function.
  • the mode switching command includes: business information
  • the service information is used for any one of the following: the user terminal sends a first message to the network side, and the first message is used for the user terminal and the network side to establish a service data transmission unicast channel or multiple Broadcast channel; the user terminal sends a second message to the application server, the second message is used to notify the application server to send service data to the user terminal.
  • the mode switching command includes one or more of the following: TMGI; multicast address.
  • the user terminal provided in the embodiment of the present invention can execute the method embodiment shown in FIG. 3, and its implementation principles and technical effects are similar, and details are not described in this embodiment here.
  • FIG. 14 is a structural diagram of a communication device applied in an embodiment of the present invention.
  • the communication device 1400 includes: a processor 1401, a transceiver 1402, a memory 1403, and a bus interface, in which:
  • the communication device 1400 further includes: a computer program stored in the memory 1403 and capable of running on the processor 1401.
  • a computer program stored in the memory 1403 and capable of running on the processor 1401.
  • the computer program shown in FIG. 1, FIG. 2 or FIG. 3 is implemented. Shows the steps in the embodiment.
  • the bus architecture may include any number of interconnected buses and bridges. Specifically, one or more processors represented by the processor 1401 and various circuits of the memory represented by the memory 1403 are linked together.
  • the bus architecture can also link various other circuits such as peripheral devices, voltage regulators, power management circuits, etc., which are all known in the art, and therefore, will not be further described herein.
  • the bus interface provides the interface.
  • the transceiver 1402 may be a plurality of elements, that is, including a transmitter and a receiver, and provide a unit for communicating with various other devices on the transmission medium.
  • the processor 1401 is responsible for managing the bus architecture and general processing, and the memory 1403 can store data used by the processor 1401 when performing operations.
  • the communication device provided by the embodiment of the present invention can execute the method embodiment shown in FIG. 1, FIG. 2 or FIG.
  • the steps of the method or algorithm described in conjunction with the disclosure of the present invention can be implemented in a hardware manner, or can be implemented in a manner that a processor executes software instructions.
  • Software instructions can be composed of corresponding software modules, which can be stored in random access memory (Random Access Memory, RAM), flash memory, read-only memory (Read-Only Memory, ROM), erasable programmable read-only memory (Erasable PROM, EPROM), Electrically Erasable Programmable Read-Only Memory (Electrically EPROM, EEPROM), registers, hard disk, mobile hard disk, CD-ROM, or any other form of storage medium known in the art.
  • An exemplary storage medium is coupled to the processor, so that the processor can read information from the storage medium and can write information to the storage medium.
  • the storage medium may also be an integral part of the processor.
  • the processor and the storage medium may be located in the ASIC.
  • the ASIC may be located in the core network interface device.
  • the processor and the storage medium may also exist as discrete components in the core network interface device.
  • the functions described in the present invention can be implemented by hardware, software, firmware, or any combination thereof.
  • these functions can be stored in a computer-readable medium or transmitted as one or more instructions or codes on the computer-readable medium.
  • the computer-readable medium includes a computer storage medium and a communication medium, where the communication medium includes any medium that facilitates the transfer of a computer program from one place to another.
  • the storage medium may be any available medium that can be accessed by a general-purpose or special-purpose computer.
  • the embodiments of the present invention may be provided as a method, a system, or a computer program product. Therefore, the embodiments of the present invention may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the embodiments of the present invention may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.
  • computer-usable storage media including but not limited to disk storage, CD-ROM, optical storage, etc.
  • These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing equipment to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing equipment can be used to generate It is a device that realizes the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.
  • These computer program instructions can also be stored in a computer-readable memory that can guide a computer or other programmable data processing equipment to work in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture including the instruction device.
  • the device implements the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.
  • These computer program instructions can also be loaded on a computer or other programmable data processing equipment, so that a series of operation steps are executed on the computer or other programmable equipment to produce computer-implemented processing, so that the computer or other programmable equipment is executed
  • the instructions provide steps for implementing the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.

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Abstract

本发明实施例提供一种模式切换的方法及设备，该方法包括：调用第二网络功能的模式切换操作，所述模式切换操作的参数包括第一信息，所述第一信息包括模式切换命令；其中，所述模式切换命令用于通知目标方执行模式切换操作。

Description

模式切换的方法及设备
相关申请的交叉引用
本申请主张在2020年2月21日在中国提交的中国专利申请号No.202010108819.5的优先权，其全部内容通过引用包含于此。
技术领域
本发明实施例涉及通信技术领域，具体涉及一种模式切换的方法及设备。
背景技术
不同于针对固定接收机的广播方式，多媒体广播多播业务(Multimedia Broadcast/Multicast Service，MBMS)的用户是可移动的。用户的移动性可能会造成用户从当前MBMS覆盖小区有移动到另外一个MBMS不覆盖的小区，则需要进行小区间的切换。若用户对当前的MBMS感兴趣或正在接收当前的MBMS，则用户进行小区间的切换时还需要考虑到MBMS业务在多播小区和单播小区之间的多播承载和单播承载的切换问题。
目前，如何在第五代移动通信技术(5th generation，5G)网络中进行多播承载和单播承载的切换是亟待解决的问题。
发明内容
本发明实施例的一个目的在于提供一种模式切换的方法及设备，解决多播和单播模式切换的问题。
第一方面，本发明实施例提供一种模式切换的方法，应用于第一网络功能，包括：
调用第二网络功能的模式切换操作，所述模式切换操作的参数包含第一信息，所述第一信息包括模式切换命令；
其中，所述模式切换命令用于通知目标方执行模式切换操作。
第二方面，本发明实施例提供一种模式切换的方法，应用于第二网络功能，包括：
模式切换操作被第一网络功能调用，所述模式切换操作的参数包含第一信息，所述第一信息包括：模式切换命令；
调用第五网络功能的业务操作，所述业务操作的参数包含所述模式切换命令的内容，或者，向用户终端发送所述模式切换命令，或者，向无线接入网节点发送所述模式切换命令。
第三方面，本发明实施例提供一种模式切换的方法，应用于用户终端，包括：
接收来自网络侧的模式切换命令；
向网络侧发送第一消息，所述第一消息用于所述用户终端与所述网络侧建立业务数据传输单播通道或多播通道，或者，用于所述用户终端向应用服务器发送第二消息，所述第二消息用于通知所述应用服务器向所述用户终端发送业务数据。
第四方面，本发明实施例提供一种网络功能，该网络功能为第一网络功能，包括：
第一调用模块，用于调用第二网络功能的模式切换操作，所述模式切换操作的参数包括第一信息，所述第一信息包括模式切换命令；其中，所述模式切换命令用于通知目标方执行模式切换操作。
第五方面，本发明实施例提供一种网络功能，该网络功能为第二网络功能，包括：
第二调用模块，用于模式切换操作被第一网络功能调用，所述模式切换操作的参数包括第一信息，所述第一信息包括：模式切换命令；
第一发送模块，用于调用第五网络功能的业务操作，所述业务操作的参数包含所述模式切换命令的内容，或者，向用户终端发送所述模式切换命令，或者，向无线接入网节点发送所述模式切换命令。
第六方面，本发明实施例提供一种用户终端，包括：
接收模块，用于网络侧接收模式切换命令；
第二发送模块，用于向网络侧发送第一消息，所述第一消息用于与所述网络侧建立业务数据传输单播通道或多播通道，或者，向应用服务器发送第二消息，所述第二消息用于通知所述应用服务器向所述用户终端发送业务数 据。
第七方面，本发明实施例提供一种通信设备，包括：处理器、存储器及存储在所述存储器上并可在所述处理器上运行的程序，所述程序被所述处理器执行时实现包括如第一方面、第二方面或第三方面所述的模式切换的方法的步骤。
第八方面，本发明实施例提供一种计算机可读存储介质，所述计算机可读存储介质上存储有计算机程序，所述计算机程序被处理器执行时实现包括如第一方面、第二方面或第三方面所述的模式切换的方法的步骤。
在本发明实施例中，核心网中的网络功能可以发起多播业务或单播业务的模式切换操作，使得用户可以在5G网络中进行多播承载和单播承载的切换，提高通信系统的可靠性。
附图说明
通过阅读下文优选实施方式的详细描述，各种其他的优点和益处对于本领域普通技术人员将变得清楚明了。附图仅用于示出优选实施方式的目的，而并不认为是对本发明的限制。而且在整个附图中，用相同的参考符号表示相同的部件。在附图中：
图1为本发明实施例模式切换的方法的流程图之一；
图2为本发明实施例模式切换的方法的流程图之二；
图3为本发明实施例模式切换的方法的流程图之三；
图4为本发明实施例的核心网执行播模式切换的流程图之一；
图5为本发明实施例的核心网执行播模式切换的流程图之二；
图6为本发明实施例的核心网执行播模式切换的流程图之三；
图7为本发明实施例的核心网执行播模式切换的流程图之四；
图8为本发明实施例的核心网执行播模式切换的流程图之五；
图9为本发明实施例的核心网执行播模式切换的流程图之六；
图10为本发明实施例的核心网执行播模式切换的流程图之七；
图11为本发明实施例的第一网络功能的示意图；
图12为本发明实施例的第二网络功能的示意图；
图13为本发明实施例的用户终端的示意图；
图14为本发明实施例的通信设备的示意图。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
本申请的说明书和权利要求书中的术语“包括”以及它的任何变形，意图在于覆盖不排他的包含，例如，包含了一系列步骤或单元的过程、方法、系统、产品或设备不必限于清楚地列出的那些步骤或单元，而是可包括没有清楚地列出的或对于这些过程、方法、产品或设备固有的其它步骤或单元。此外，说明书以及权利要求中使用“和/或”表示所连接对象的至少其中之一，例如A和/或B，表示包含单独A，单独B，以及A和B都存在三种情况。
在本发明实施例中，“示例性的”或者“例如”等词用于表示作例子、例证或说明。本发明实施例中被描述为“示例性的”或者“例如”的任何实施例或设计方案不应被解释为比其它实施例或设计方案更优选或更具优势。确切而言，使用“示例性的”或者“例如”等词旨在以具体方式呈现相关概念。
在本发明实施例中，网络功能可以通过网络实体设备来实现，或者也可以通过虚拟机中的实例实现，即网络功能可以是实体设备，也可以是虚拟的装置。
本文所描述的技术不限于长期演进型(Long Time Evolution，LTE)/LTE的演进(LTE-Advanced，LTE-A)系统，并且也可用于各种无线通信系统，诸如码分多址(Code Division Multiple Access，CDMA)、时分多址(Time Division Multiple Access，TDMA)、频分多址(Frequency Division Multiple Access，FDMA)、正交频分多址(Orthogonal Frequency Division Multiple Access，OFDMA)、单载波频分多址(Single-carrier Frequency-Division Multiple Access，SC-FDMA)和其他系统。
术语“系统”和“网络”常被可互换地使用。CDMA系统可实现诸如 CDMA2000、通用地面无线电接入(Universal Terrestrial Radio Access，UTRA)等无线电技术。UTRA包括宽带CDMA(Wideband Code Division Multiple Access，WCDMA)和其他CDMA变体。TDMA系统可实现诸如全球移动通信系统(Global System for Mobile Communication，GSM)之类的无线电技术。OFDMA系统可实现诸如超移动宽带(Ultra Mobile Broadband，UMB)、演进型UTRA(Evolution-UTRA，E-UTRA)、IEEE 802.11(Wi-Fi)、IEEE 802.16(WiMAX)、IEEE 802.20、Flash-OFDM等无线电技术。UTRA和E-UTRA是通用移动电信系统(Universal Mobile Telecommunications System，UMTS)的部分。LTE和更高级的LTE(如LTE-A)是使用E-UTRA的新UMTS版本。UTRA、E-UTRA、UMTS、LTE、LTE-A以及GSM在来自名为“第三代伙伴项目”(3rd Generation Partnership Project，3GPP)的组织的文献中描述。CDMA2000和UMB在来自名为“第三代伙伴项目2”(3GPP2)的组织的文献中描述。本文所描述的技术既可用于以上提及的系统和无线电技术，也可用于其他系统和无线电技术。
本发明实施例提供的用户终端可以为手机、平板电脑、笔记本电脑、超级移动个人计算机(Ultra-Mobile Personal Computer，UMPC)、上网本或者个人数字助理(Personal Digital Assistant，PDA)、移动上网装置(Mobile Internet Device，MID)、可穿戴式设备(Wearable Device)或车载设备等。
参见图1，本发明实施例提供一种模式切换的方法，该方法的执行主体可以为第一网络功能，该第一网络功能为核心网中的网络功能，例如多播广播业务功能(Multicast Broadcast Service Function，MBSF)，包括：步骤101。
步骤101：调用第二网络功能的模式切换操作，所述模式切换操作的参数包含第一信息，所述第一信息包括模式切换命令；
其中，所述模式切换命令用于通知目标方执行模式切换操作，其中模式切换操作包括：单播模式切换到多播模式，多播模式切换到单播模式。
在一些实施方式中，所述目标方可以为用户终端或无线接入网节点(例如基站)。也就是，用户终端可以基于核心网网元的触发执行单播模式切换到多播模式，或者多播模式切换到单播模式，或者基站基于核心网网元的触发执行单播模式切换到多播模式，或者多播模式切换到单播模式。
在一些实施方式中，第二网络功能可以为多播广播会话管理功能(Multicast Broadcast Session Management Function，MB-SMF)或接入和移动性管理功能(Access and Mobility Management Function，AMF)，当然并不限于此。
在一些实施方式中，在步骤101之前，所述方法还包括：
基于多播业务的用户数(例如多播业务的总的用户数)，或多播业务区域中的用户数，或业务操作被调用，执行所述调用第二网络功能的模式切换操作，例如从单播模式转换为多播模式的模式切换操作，或者从多播模式转换为单播模式的模式切换操作。
上述多播业务的用户数可以是多播业务的总的用户数。
上述多播业务区域的用户数可以是多播业务跟踪区的用户数。
上述业务操作被调用包括：多播业务操作被调用(比如应用服务器调用了MBSF的业务操作，或MB-SMF调用了MBSF的业务操作)或者应用服务器调用单播业务操作。
例如，如果多播业务的总的用户数，或多播业务区域中的用户数大于预设数值，或多播业务操作被调用，执行调用第二网络功能的模式切换操作，从单播模式转换为多播模式。
又例如，如果多播业务的总的用户数，或多播业务区域中的用户数小于预设数值，或单播业务操作被调用，执行调用第二网络功能的模式切换操作，从多播模式转换为单播模式。
在一些实施方式中，所述第一信息还包括以下一项或多项：
(1)用户信息(User Information)，例如用户标识(User ID)，比如用户永久标识符(Subscription Permanent Identifier，SUPI)或国际移动用户识别码(International Mobile Subscriber Identity，IMSI)；
(2)服务于用户终端的AMF的信息，比如，AMF标识(例如，全球唯一AMF标识(Globally Unique AMF ID，GUAMI))。
在一些实施方式中，在步骤101之前，所述方法还包括：向统一数据管理功能(Unified Data Manager，UDM)查询AMF的信息。
在一些实施方式中，所述模式切换命令包括：业务信息(或者称为多播 业务信息)，或者会话信息；
其中，所述业务信息用于以下任意一项：
(1)所述用户终端向网络侧发送第一消息，所述第一消息用于用户终端与所述网络侧建立业务数据传输单播通道或多播通道；
(2)所述用户终端向应用服务器发送第二消息，所述第二消息用于通知所述应用服务器向所述用户终端发送业务数据；
其中，所述会话信息用于以下任意一项：
(1)所述无线接入网节点(例如基站)向核心网发送第三消息，所述第三消息无线接入网节点用于与第三网络功能(例如，多播广播用户面功能(MB-UPF))建立或保持业务数据传输多播通道；或者，所述第三消息用于无线接入网节点与第四网络功能(例如，用户面功能(User Plane Function，UPF))建立业务数据传输单播通道；
(2)所述无线接入网节点不发送消息以与第三网络功能(例如，MB-UPF)保持业务数据传输多播通道。
上述单播通道为核心网用户面功能(比如UPF)与每个用户终端建立业务数据传输通道以分别向各用户终端发送业务数据，包括：核心网用户面功能与无线接入网节点间通道以及无线接入网节点与用户终端间通道。
上述多播通道包含核心网用户面功能(比如MB-UPF)与无线接入网节点间业务数据传输通道，该通道使得核心网用户面功能分别向各无线接入网节点发送业务数据就可以让无线接入网节点向该无线接入网节点覆盖的所有用户终端发送业务数据，该通道为该无线接入节点下所有该业务的用户终端所共享。
在一些实施方式中，所述模式切换命令包括以下一项或多项：
(1)所述第三网络功能的信息，例如MB-UPF的地址信息；
(2)临时移动组标识(Temporary Mobile Group Identity，TMGI)；
(3)多播地址(multicast address)，例如IP multicast address；
(4)协议数据单元会话标识(PDU session ID)。
在本发明实施例中，核心网中的网络功能可以发起多播业务或单播业务的模式切换操作。
参见图2，本发明实施例还提供一种模式切换的方法，该方法的执行主体可以为第二网络功能，该第二网络功能为核心网中的网络功能，例如MB-SMF或者AMF，包括：
步骤201：模式切换操作被第一网络功能调用，所述模式切换操作的参数包括第一信息，所述第一信息包括：模式切换命令
可以理解的是，该第一网络功能为核心网中的网络功能，例如MBSF。
步骤202：调用第五网络功能的业务操作，所述业务操作的参数包含所述模式切换命令的内容，或者，向用户终端发送所述模式切换命令，或者，向无线接入网节点发送所述模式切换命令。
可以理解的是，若第二网络功能为MB-SMF时，第五网络功能为AMF。
在一些实施方式中，所述第一信息还可以包括以下一项或多项：
(1)用户信息，例如用户标识，比如SUPI或IMSI；
(2)服务于用户终端的AMF的信息，比如，AMF标识，例如，GUAMI。
在一些实施格式中，在步骤201之前，方法还可以包括：向统一数据管理功能查询服务于用户终端的AMF的信息。
在本发明实施例中，核心网中的网络功能可以发起多播业务或单播业务的模式切换操作，使得用户可以在5G网络中进行多播承载和单播承载的切换，提高通信系统的可靠性。
参见图3，本发明实施例还提供一种模式切换的方法，该方法的执行主体可以为用户终端，包括：步骤301和步骤302。
步骤301：接收来自网络侧的模式切换命令；
可选地，所述模式切换命令是所述第二网络功能通过第一网络功能调用的模式切换操作参数获取的。
可选地，模式切换命令包括：业务信息；其中，所述业务信息用于以下任意一项：所述用户终端向网络侧发送第一消息，所述第一消息用于所述用户终端与所述网络侧建立业务数据传输单播通道或多播通道；所述用户终端向应用服务器发送第二消息，所述第二消息用于通知所述应用服务器向所述用户终端发送业务数据。
可选地，所述模式切换命令包括以下一项或多项：TMGI；多播地址。
步骤302：向网络侧发送第一消息，所述第一消息用于用户终端与所述网络侧建立业务数据传输单播通道或多播通道，或者，用于用户终端向应用服务器发送第二消息，所述第二消息用于通知所述应用服务器向用户终端发送业务数据。
在一些实施方式中，所述第一消息包括：业务信息。
其中，所述业务信息用于：所述用户终端向网络发送第一消息，所述第一消息用于与所述网络建立业务数据传输单播通道或多播通道，或者，
所述业务信息用于：所述用户终端向应用服务器(例如内容提供方)发送第二消息，所述第二消息用于通知所述应用服务器向用户终端发送业务数据。
在一些实施方式中，所述业务信息包括以下一项或多项：(1)TMGI；多播地址，例如IP multicast address。
在本发明实施例中，用户终端可以基于核心网中的网络功能发起的多播业务或单播业务的模式切换操作进行多播承载和单播承载的切换，提高通信系统的可靠性。
下面结合实施例一至实施例七介绍本发明的实施方式，其中第一网元为MBSF，第二网元为无线接入网节点，第三网元为MB-UPF，所述第四网元为UPF，第五网元为MB-SMF。
当MBSF决定切换模式时，需要通知MB-SMF建立MB-UPF和RAN节点间的共享通道(单播转多播)或通知用户终端(User Equipment，UE)建立协议数据单元会话(PDU session)(多播转单播)，使得MB-UPF可以通过共享通道转发多播数据，或通过UPF与UE间的PDU session进行每个用户终端(per UE)的数据转发(单播)。
实施例一
参见图4，图中示意核心网执行多播模式切换的流程，包括步骤：401-409。
步骤401：MBSF基于多播业务的用户数，或同一区域的多播业务用户数决定触发模式切换，或业务操作被调用，比如内容提供方(Content Provider)调用了MBSF的业务操作，或MB-SMF调用了MBSF的业务操作；
例如，MB-UPF接收到多播数据报文后，将数据报文的目标地址(多播 地址)逐个替换为多播业务中各用户终端的地址再转发(即使用单播模式)，转发的数据报文会被路由到与对应用户终端建立了会话连接的UPF，UPF再将数据报文转发给用户终端。MBSF基于多播业务的用户数，或一个或多个区域(比如跟踪区，或基站节点等)的多播业务的用户数决定要转换单播模式为多播模式。
可以理解的是，以下步骤为针对每个用户终端逐个执行。
步骤402：MBSF从UDM获取服务于用户的AMF的信息。
例如，MBSF向UDM请求服务于某个用户终端的AMF的信息，比如，AMF标识(例如，全球唯一AMF标识(Globally Unique AMF ID，GUAMI))。
步骤403：MBSF调用MB-SMF的模式切换操作；
比如，调用Nmbsmf_ModeSwitch操作，携带发送给基站的模式切换命令，该模式切换命令携带会话信息，比如TMGI或IP multicast address，用于通知基站建立与MB-UPF间的共享数据通道；
其中，还可以携带以下一项或多项：
(1)MB-UPF的地址信息；
(2)用户标识，比如，用户永久标识符(Subscription Permanent Identifier，SUPI)或国际移动用户识别码(International Mobile Subscriber Identity，IMSI)；
(3)AMF的信息，比如GUAMI。
步骤404：MB-SMF调用AMF的多播会话操作；
MB-SMF向统一数据管理(Unified Data Manager，UDM)请求服务于某个用户终端的AMF的信息，比如：GUAMI，MB-SMF调用AMF的Namf_MBSession操作，携带用户标识和/或模式切换命令。
步骤405：AMF向服务用户终端的基站(gNB)转发模式切换命令。
步骤406：基站预留多播资源，向AMF发送模式切换响应；
其中，模式切换响应可以携带以下一项或多项：(1)基站的信息；(2)通道标识信息。
如果基站已经与MB-UPF建立了共享数据通道，则直接向AMF发送已经存在的共享通道的信息，或发送无需建立通道的指示，或不发送消息。
步骤407：在接收基站发送的模式切换响应之后，AMF向MB-SMF返回 多播会话操作结果。
其中，多播会话操作结果可以携带接收到的模式切换响应。
步骤408：MB-SMF和MB-UPF之间进行连接更新；
例如，MB-SMF通过模式切换响应判断需要更新MB-UPF(即建立MB-UPF与对应基站的共享通道)，命令MB-UPF更新多播会话，包括告知MB-UPF对应的基站的地址信息和通道标识。
步骤409：MB-SMF可以向MBSF返回模式切换操作结果。
至此，MB-UPF可以将接收到的多播数据报文向各个与基站间的共享通道转发。
实施例二
参见图5，图中示意核心网执行多播模式切换的流程，包括步骤：501-508。
步骤501～502：与实施例一的步骤401～402的描述相同。
可以理解的是，以下步骤为针对每个用户逐个执行。
步骤503：MBSF调用AMF的模式切换操作，比如Namf_Communicatioon_N1N2MessageTransfer，携带发送给基站系统的模式切换命令，该模式切换命令携带会话信息，比如TMGI，用于通知基站系统建立与MB-UPF间的共享数据通道，其中可以携带有MB-UPF的地址信息，还可以携带用户标识，比如SUPI或IMSI。
步骤504～508：与实施例一的步骤405～409描述相同。
实施例三
参见图6，图中示意核心网执行多播模式切换的流程，包括步骤：601-608。
步骤601～602：与实施例一的步骤401～402的描述相同。
可以理解的是，以下步骤为针对每个用户逐个执行。
步骤603：MBSF调用AMF的模式切换操作，比如Namf_Communicatioon_N1N2MessageTransfer，携带发送给用户终端的模式切换命令，该模式切换命令携带业务信息，比如TMGI，用于通知用户终端发起多播会话建立过程，还可以携带用户标识，比如SUPI或IMSI。
步骤604：AMF向用户终端转发模式切换命令。
步骤605：用户终端发起多播会话建立请求，比如发送携带TMGI或IP  multicast address的PDU session establishment消息，以触发多播会话建立过程，MBSF在这个过程中通知MB-SMF建立基站节点与MB-UPF间的共享数据通道。
实施例四
参见图7，图中示意核心网执行多播模式切换的流程，包括步骤701-708。
步骤701：MBSF基于多播业务的用户数，或同一区域的多播业务用户数决定触发模式切换，或业务操作被调用，比如Content Provider调用了MBSF的业务操作，或MB-SMF调用了MBSF的业务操作；
例如，MB-UPF接收到多播数据报文后，将数据报文逐个通过与各个基站间的共享通道转发给基站(多播模式)，再由基站转发给各个用户终端。MBSF基于多播业务的用户数，或一个或多个区域(比如一个或多个跟踪区，或一个或多个基站节点等)的多播业务的用户数决定要转换多播模式为单播模式。
可以理解的是，以下步骤为针对每个用户终端逐个执行。
步骤702：MBSF从UDM获取服务于用户的AMF的信息；
比如，MBSF向UDM请求服务于某个用户终端的AMF的信息，比如AMF标识(GUAMI)。
步骤703：MBSF调用服务于该用户终端的MB-SMF的模式切换操作；
比如，调用Nmbsmf_ModeSwitch操作，携带发送给用户终端的模式切换命令，该模式切换命令可以携带业务信息，比如TMGI或IP multicast address，用于通知用户终端建立与核心网的单播数据连接。
进一步地，还可以携带以下一项或多项：(1)用户标识，比如：SUPI或IMSI；(2)AMF的信息，比如AMF标识(GUAMI)。
步骤704：MB-SMF调用AMF的多播会话操作；
比如，MB-SMF向UDM请求服务于某个用户终端的AMF的信息，比如AMF标识(GUAMI)，MB-SMF调用AMF的多播会话操作，比如调用Namf_MBSession操作。
其中，多播会话操作携带用户标识和/或模式切换命令。
步骤705：AMF向用户终端转发模式切换命令。
步骤706：用户终端向核心网发起会话建立请求；
比如，用户终端发送请求消息，请求消息包括以下一项或多项：
(1)PDU会话建立(PDU session establishment)消息；
(2)PDU会话修改(PDU session modification)消息；
(3)服务请求(Service Request)消息；
(4)多播会话建立请求消息(比如，多播服务请求(MB Service Request)消息；
其中，请求消息中可以携带业务信息，比如，TMGI或IP multicast address。
步骤707：MB-SMF调用MBSF的多播操作；
比如，MB-SMF在执行多播会话建立过程中，调用MBSF的多播操作，比如，调用Nmbsf_UserAuth操作，携带业务信息，比如TMGI或IP multicast address。
步骤708：MBSF判断已经针对该多播业务执行模式切换操作，向MB-SMF返回多播操作结果。
其中，多播操作结果中可以携带单播模式指示，或不携带模式指示用于指示使用单播模式。
实施例五
参见图8，图中示意核心网执行多播模式切换的流程，包括步骤801-808。
步骤801～802：与实施例四的步骤701～702的描述相同。
可以理解的是，以下步骤为针对每个用户逐个执行。
步骤803：MBSF调用AMF的模式切换操作，比如调用Namf_Communicatioon_N1N2MessageTransfer，携带发送给用户终端的模式切换命令，该模式切换命令携带业务信息，比如TMGI，用于通知用户终端使用单播数据连接，还可以携带用户标识，比如SUPI或IMSI。
步骤804～807：与实施例四的步骤705～708的描述相同。
实施例六
参见图9，图中示意核心网执行多播模式切换的流程，包括步骤901-907。
步骤901～902：与实施例四的步骤701～702的描述相同。
可以理解的是，以下步骤为针对每个用户逐个执行。
步骤903：MBSF调用AMF的模式切换操作，比如Namf_Communicatioon_N1N2MessageTransfer，携带发送给基站系统的模式切换命令，该模式切换命令携带会话信息，比如，PDU session ID，或者TMGI，或者IP multicast address，用于通知基站系统发起会话更新过程，以建立用户终端与核心网的单播数据连接，还可以携带用户标识，比如SUPI或IMSI。
步骤904：AMF向服务于用户的基站节点转发模式切换命令。
步骤905：基站节点发起会话更新过程，比如向AMF发送携带PDU session ID和TMGI的消息。
步骤906：MB-SMF在执行多播会话更新过程中，调用MBSF的多播操作，比如Nmbsf_UserAuth操作，携带业务信息，比如TMGI或IP multicast address。
步骤907：MBSF判断已经针对该多播业务执行模式切换操作，向MB-SMF返回多播操作结果，携带单播模式指示，或不携带模式指示用于指示使用单播模式。
实施例七
参见图10，图中示意核心网执行多播模式切换的流程，包括步骤1001-1005。
步骤1001～1002：与实施例四的步骤701～702的描述相同。
以下步骤为针对每个用户逐个执行。
步骤1003：MBSF调用AMF的模式切换操作，比如Namf_Communicatioon_N1N2MessageTransfer，携带发送给用户终端的模式切换命令，该模式切换命令携带业务信息，比如TMGI或IP multicast address，用于通知用户终端使用单播数据连接，还可以携带用户标识，比如SUPI或IMSI。
步骤1005：用户终端向内容提供方(Content Provider)发送模式切换通知，用于通知内容提供方以用户终端为目标发送业务数据。
参见图11，本发明实施例还提供一种第一网络功能，该第一网络功能1100包括：
第一调用模块1101，用于调用第二网络功能的模式切换操作，所述模式 切换操作的参数包含第一信息，所述第一信息包括模式切换命令；其中，所述模式切换命令用于通知目标方执行模式切换操作。
在一些实施方式中，第一网络功能1100还包括：
判断模块，用于基于多播业务的用户数，或多播业务区域中的用户数，或业务操作被调用，执行所述调用第二网络功能的模式切换操作。
在一些实施方式中，所述第一信息还包括以下一项或多项：用户信息，服务于所述用户终端的AMF的信息。
在一些实施方式中，所述第一网络功能1100还包括：第一查询模块，用于向统一数据管理功能查询AMF的信息。
在一些实施方式中，所述目标方为用户终端或无线接入网节点。
在一些实施方式中，所述模式切换命令包括：业务信息或会话信息；
其中，所述业务信息用于以下任意一项：
(1)用户终端向网络侧发送第一消息，所述第一消息用于用户终端与所述网络侧建立业务数据传输单播通道或多播通道；
(2)用户终端向应用服务器发送第二消息，所述第二消息用于通知所述应用服务器向所述用户终端发送业务数据；
其中，所述会话信息用于以下任意一项：
(1)所述无线接入网节点向核心网发送第三消息，所述第三消息用于无线接入网节点与第三网络功能建立或保持业务数据传输多播通道；或者无线接入网节点与第四网络功能建立业务数据传输单播通道；
(2)所述无线接入网节点不发送消息以与第三网络功能保持业务数据传输多播通道。
在一些实施方式中，所述模式切换命令包括以下一项或多项：
(1)所述第三网络功能的信息；
(2)临时移动组标识；
(3)多播地址，例如IP multicast address；
(4)协议数据单元会话标识。
本发明实施例提供的第一网络功能，可以执行上述图1所示方法实施例，其实现原理和技术效果类似，本实施例此处不再赘述。
参见图12，本发明实施例还提供一种第二网络功能，该第二网络功能1200包括：
第二调用模块1201，用于模式切换操作被第一网络功能调用，所述模式切换操作的参数包含第一信息，所述第一信息包括：模式切换命令；
第一发送模块1202，用于调用第五网络功能的业务操作，所述业务操作的参数包含所述模式切换命令的内容，或者，向用户终端发送所述模式切换命令，或者，向无线接入网节点发送所述模式切换命令。
在一些实施方式中，所述第一信息还包括以下一项或多项：用户信息，服务于所述用户终端的接入和移动性管理功能的信息。
在一些实施方式中，第二网络功能1200还包括：
第二查询模块，用于向统一数据管理功能查询服务于用户终端的接入和移动性管理功能的信息。
本发明实施例提供的第二网络功能，可以执行上述图2所示方法实施例，其实现原理和技术效果类似，本实施例此处不再赘述。
参见图13，本发明实施例还提供一种用户终端，该用户终端1300包括：
接收模块1301，用于接收来自网络侧的模式切换命令；
第二发送模块1302，用于向网络侧发送第一消息，所述第一消息用于用户终端与所述网络侧建立业务数据传输单播通道或多播通道，或者，向应用服务器发送第二消息，所述第二消息用于通知所述应用服务器向所述用户终端发送业务数据。
可选地，所述模式切换命令是所述第二网络功能通过第一网络功能调用的模式切换操作参数获取的。
在一些实施方式中，所述模式切换命令包括：业务信息；
其中，所述业务信息用于以下任意一项：所述用户终端向网络侧发送第一消息，所述第一消息用于所述用户终端与所述网络侧建立业务数据传输单播通道或多播通道；所述用户终端向应用服务器发送第二消息，所述第二消息用于通知所述应用服务器向所述用户终端发送业务数据。
在一些实施方式中，所述模式切换命令包括以下一项或多项：TMGI；多播地址。
本发明实施例提供的用户终端，可以执行上述图3所示方法实施例，其实现原理和技术效果类似，本实施例此处不再赘述。
请参阅图14，图14是本发明实施例应用的通信设备的结构图，如图14所示，通信设备1400包括：处理器1401、收发机1402、存储器1403和总线接口，其中：
在本发明的一个实施例中，通信设备1400还包括：存储在存储器上1403并可在处理器1401上运行的计算机程序，计算机程序被处理器1401执行时实现图1、图2或图3所示实施例中的步骤。
在图14中，总线架构可以包括任意数量的互联的总线和桥，具体由处理器1401代表的一个或多个处理器和存储器1403代表的存储器的各种电路链接在一起。总线架构还可以将诸如外围设备、稳压器和功率管理电路等之类的各种其他电路链接在一起，这些都是本领域所公知的，因此，本文不再对其进行进一步描述。总线接口提供接口。收发机1402可以是多个元件，即包括发送机和接收机，提供用于在传输介质上与各种其他装置通信的单元。
处理器1401负责管理总线架构和通常的处理，存储器1403可以存储处理器1401在执行操作时所使用的数据。
本发明实施例提供的通信设备，可以执行上述图1、图2或图3所示方法实施例，其实现原理和技术效果类似，本实施例此处不再赘述。
结合本发明公开内容所描述的方法或者算法的步骤可以硬件的方式来实现，也可以是由处理器执行软件指令的方式来实现。软件指令可以由相应的软件模块组成，软件模块可以被存放于随机存取存储器(Random Access Memory，RAM)、闪存、只读存储器(Read-Only Memory，ROM)、可擦除可编程只读存储器(Erasable PROM，EPROM)、电可擦除可编程只读存储器(Electrically EPROM，EEPROM)、寄存器、硬盘、移动硬盘、只读光盘或者本领域熟知的任何其它形式的存储介质中。一种示例性的存储介质耦合至处理器，从而使处理器能从该存储介质读取信息，且可向该存储介质写入信息。当然，存储介质也可以是处理器的组成部分。处理器和存储介质可以位于ASIC中。另外，该ASIC可以位于核心网接口设备中。当然，处理器和存储介质也可以作为分立组件存在于核心网接口设备中。
本领域技术人员应该可以意识到，在上述一个或多个示例中，本发明所描述的功能可以用硬件、软件、固件或它们的任意组合来实现。当使用软件实现时，可以将这些功能存储在计算机可读介质中或者作为计算机可读介质上的一个或多个指令或代码进行传输。计算机可读介质包括计算机存储介质和通信介质，其中通信介质包括便于从一个地方向另一个地方传送计算机程序的任何介质。存储介质可以是通用或专用计算机能存取的任何可用介质。
以上所述的具体实施方式，对本发明的目的、技术方案和有益效果进行了进一步详细说明，所应理解的是，以上所述仅为本发明的具体实施方式而已，并不用于限定本发明的保护范围，凡在本发明的技术方案的基础之上，所做的任何修改、等同替换、改进等，均应包括在本发明的保护范围之内。
本领域内的技术人员应明白，本发明实施例可提供为方法、系统、或计算机程序产品。因此，本发明实施例可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且，本发明实施例可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器、CD-ROM、光学存储器等)上实施的计算机程序产品的形式。
本发明实施例是参照根据本发明实施例的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上， 使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
显然，本领域的技术人员可以对本发明实施例进行各种改动和变型而不脱离本发明的精神和范围。这样，倘若本发明实施例的这些修改和变型属于本发明权利要求及其等同技术的范围之内，则本发明也意图包含这些改动和变型在内。

Claims (22)

  1. 一种模式切换的方法，应用于第一网络功能，包括：
    调用第二网络功能的模式切换操作，所述模式切换操作的参数包含第一信息，所述第一信息包括模式切换命令；
    其中，所述模式切换命令用于通知目标方执行模式切换操作。
  2. 根据权利要求1所述的方法，其中，在所述调用第二网络功能的模式切换操作之前，所述方法还包括：
    基于多播业务的用户数，或多播业务区域中的用户数，或业务操作被调用，决定执行所述调用第二网络功能的模式切换操作。
  3. 根据权利要求1所述的方法，其中，所述第一信息还包括以下一项或多项：用户信息，服务于用户终端的接入和移动性管理功能的信息。
  4. 根据权利要求1所述的方法，还包括：
    向统一数据管理功能查询接入和移动性管理功能的信息。
  5. 根据权利要求1所述的方法，其中，所述目标方为用户终端或无线接入网节点。
  6. 根据权利要求5所述的方法，其中，所述模式切换命令包括：业务信息或会话信息；
    其中，所述业务信息用于以下任意一项：
    所述用户终端向网络侧发送第一消息，所述第一消息用于所述用户终端与所述网络侧建立业务数据传输单播通道或多播通道；
    所述用户终端向应用服务器发送第二消息，所述第二消息用于通知所述应用服务器向所述用户终端发送业务数据；
    其中，所述会话信息用于以下任意一项：
    所述无线接入网节点向核心网发送第三消息，所述第三消息用于所述无线接入网节点与第三网络功能建立或保持业务数据传输多播通道；或者所述无线接入网节点与第四网络功能建立业务数据传输单播通道；
    所述无线接入网节点不发送消息以与第三网络功能保持业务数据传输多播通道。
  7. 根据权利要求5所述的方法，其中，所述模式切换命令包括以下一项或多项：
    第三网络功能的信息；
    临时移动组标识TMGI；
    多播地址；
    协议数据单元会话标识。
  8. 一种模式切换的方法，应用于第二网络功能，包括：
    模式切换操作被第一网络功能调用，所述模式切换操作的参数包含第一信息，所述第一信息包括：模式切换命令；
    调用第五网络功能的业务操作，所述业务操作的参数包含所述模式切换命令的内容，或者，向用户终端发送所述模式切换命令，或者，向无线接入网节点发送所述模式切换命令。
  9. 根据权利要求8所述的方法，其中，所述第一信息还包括以下一项或多项：用户信息，服务于所述用户终端的接入和移动性管理功能的信息。
  10. 根据权利要求8所述的方法，还包括：
    向统一数据管理功能查询服务于所述用户终端的接入和移动性管理功能的信息。
  11. 一种模式切换的方法，应用于用户终端，包括：
    接收来自网络侧的模式切换命令；
    向所述网络侧发送第一消息，所述第一消息用于所述用户终端与所述网络侧建立业务数据传输单播通道或多播通道，或者，用于所述用户终端向应用服务器发送第二消息，所述第二消息用于通知所述应用服务器向所述用户终端发送业务数据。
  12. 根据权利要求11所述的方法，其中，所述模式切换命令包括：业务信息；
    其中，所述业务信息用于以下任意一项：
    所述用户终端向网络侧发送第一消息，所述第一消息用于所述用户终端与所述网络侧建立业务数据传输单播通道或多播通道；
    所述用户终端向应用服务器发送第二消息，所述第二消息用于通知所述 应用服务器向所述用户终端发送业务数据。
  13. 根据权利要求11所述的方法，其中，所述模式切换命令包括以下一项或多项：
    TMGI；
    多播地址。
  14. 一种网络功能，所述网络功能为第一网络功能，包括：
    第一调用模块，用于调用第二网络功能的模式切换操作，所述模式切换操作的参数包括第一信息，所述第一信息包括模式切换命令，所述模式切换命令用于通知目标方执行模式切换操作。
  15. 一种网络功能，所述网络功能为第二网络功能，包括：
    第二调用模块，用于模式切换操作被第一网络功能调用，所述模式切换操作的参数包括第一信息，所述第一信息包括：模式切换命令；
    第一发送模块，用于调用第五网络功能的业务操作，所述业务操作的参数包含所述模式切换命令的内容，或者，向用户终端发送所述模式切换命令，或者，向无线接入网节点发送所述模式切换命令。
  16. 一种用户终端，包括：
    接收模块，用于从网络侧接收模式切换命令；
    第二发送模块，用于向所述网络侧发送第一消息，所述第一消息用于与所述网络侧建立业务数据传输单播通道或多播通道，或者，向应用服务器发送第二消息，所述第二消息用于通知所述应用服务器向所述用户终端发送业务数据。
  17. 一种通信设备，包括：处理器、存储器及存储在所述存储器上并可在所述处理器上运行的程序，所述程序被所述处理器执行时实现包括如权利要求1至13中任一项所述的模式切换的方法的步骤。
  18. 一种计算机可读存储介质，所述计算机可读存储介质上存储有计算机程序，所述计算机程序被处理器执行时实现包括如权利要求1至13中任一项所述的模式切换的方法的步骤。
  19. 一种计算机程序产品，所述程序产品被至少一个处理器执行以实现如权利要求1-13任一项所述的模式切换的方法。
  20. 一种网络功能，用于执行如权利要求1-7任一项所述的模式切换的方法。
  21. 一种网络功能，用于执行如权利要求8-10任一项所述的模式切换的方法。
  22. 一种用户终端，用于执行如权利要求11-13任一项所述的模式切换的方法。
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