WO2018161796A1 - 多接入场景中的连接处理方法和装置 - Google Patents

多接入场景中的连接处理方法和装置 Download PDF

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Publication number
WO2018161796A1
WO2018161796A1 PCT/CN2018/076763 CN2018076763W WO2018161796A1 WO 2018161796 A1 WO2018161796 A1 WO 2018161796A1 CN 2018076763 W CN2018076763 W CN 2018076763W WO 2018161796 A1 WO2018161796 A1 WO 2018161796A1
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WIPO (PCT)
Prior art keywords
access
session
communication network
information
user equipment
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PCT/CN2018/076763
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English (en)
French (fr)
Inventor
于游洋
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Priority claimed from CN201810037231.8A external-priority patent/CN108574969B/zh
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP18764410.9A priority Critical patent/EP3576471B1/en
Publication of WO2018161796A1 publication Critical patent/WO2018161796A1/zh
Priority to US16/563,236 priority patent/US11290974B2/en
Priority to US17/688,434 priority patent/US11737045B2/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W60/00—Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration
    • H04W60/005—Multiple registrations, e.g. multihoming

Definitions

  • the embodiments of the present invention relate to communication technologies, and in particular, to a connection processing method and apparatus in a multiple access scenario.
  • the 3GPP standards group developed the next generation Next Generation System, called 5G network architecture, at the end of 2016.
  • the architecture not only supports the access of the 3GPP core group (such as LTE, 5G RAN, etc.) access to the core network side (5G Core network), but also supports the non-3GPP (non-3GPP) access technology through the non-3GPP conversion function (non -3GPP Interworking Function, N3IWF) or next generation packet data gateway (ngPDG) accesses the core network side.
  • N3IWF non -3GPP Interworking Function
  • ngPDG next generation packet data gateway
  • the current 3GPP communication protocol has not specified how the user equipment (User Equipment, UE) can simultaneously register to the 3GPP network and the non-3GPP network, that is, the requirement for the UE to double register with the 3GPP network and the non-3GPP network cannot be satisfied.
  • UE User Equipment
  • the embodiments of the present invention provide a connection processing method and apparatus in a multiple access scenario to meet the requirements of multiple registrations of the UE in the first communication network and the second communication network.
  • an embodiment of the present invention provides a connection processing method in a multiple access scenario, including:
  • the mobility management function entity receives the first transmission message sent by the access network device, where the first transmission message includes a registration request message, where the registration request message may include the first multiple access indication information and the identifier information, where the identifier information is used to obtain At least one of context information of the user equipment and a selected network function entity;
  • the mobility management function entity performs a registration process of the user equipment in the second communication network.
  • the multi-access registration of the user equipment in the first communication network and the second communication network can be implemented by the connection processing method in the multiple access scenario provided by the first aspect, so as to satisfy the user equipment in the first communication network and the second communication network. Multiple registration requirements.
  • the mobility management function entity determines, according to the first multiple access indication information and the identification information, that the user equipment is registered in the first communication network and initiated in the second
  • the registration of the communication network may specifically include:
  • the mobility management function entity acquires context information of the user equipment according to the identifier information
  • the mobility management function entity determines, according to the first multiple access indication information, that the user equipment initiates registration in the second communication network.
  • the first transmission message further includes access type indication information, the mobility management function entity Determining, according to the first multiple access indication information and the identifier information, that the user equipment is registered in the first communications network and initiates registration in the second communications network, including:
  • the mobility management function entity determines, according to the access type indication information, the first multiple access indication information, and the identification information, that the user equipment is registered in the first communication network and initiates registration in the second communication network.
  • connection processing method in a multiple access scenario including:
  • the mobility management function entity receives the first transmission message sent by the access network device, where the first transmission message includes an access type indication information and a registration request message, where the registration request message includes identification information, and the identifier information is used to obtain At least one of context information of the user equipment and a selected network function entity;
  • the mobility management function entity executes the user equipment The registration process of the second communication network.
  • the multi-access registration of the user equipment in the first communication network and the second communication network can be implemented by the connection processing method in the multiple access scenario provided by the second aspect, so as to satisfy the user equipment in the first communication network and the second communication network. Multiple registration requirements.
  • the mobility management function entity determines, according to the access type indication information and the identifier information, that the user equipment is registered in the first communication network. And initiated registration in the second communication network, including:
  • the mobility management function entity acquires context information of the user equipment according to the identifier information
  • the mobility management function entity determines, according to the access type indication information, that the user equipment initiates registration in the second communication network.
  • the mobility management function entity performs the registration process of the user equipment in the second communication network, and the method further includes:
  • the mobility management function entity determines, according to the subscription information of the user equipment, that the user equipment is allowed to register in the first communication network and the second communication network.
  • the method further includes:
  • the mobility management function entity determines that the user equipment is not allowed to register in the first communication network and the second communication network according to the subscription information or the local configuration information of the user equipment, the mobility management function entity executes the user The registration process of the device in the second communication network, and initiates a deregistration process of the user equipment in the first communication network or deletes a registration status of the user equipment in the first communication network.
  • the method further includes: the second multiple access indication information, the method further includes:
  • the mobility management function entity sends a second transmission message to the session management function entity, where the second transmission message includes a permanent identifier of the user equipment and PDU session establishment request information, where the PDU session establishment request information includes the session identifier and the second
  • the multi-access indication information is used to indicate that the user equipment requests to establish a multi-access PDU session for the session service corresponding to the session identifier.
  • the establishment of a multi-access PDU session can be achieved by the connection processing method in the multiple access scenario provided by this embodiment.
  • the second transmission message further includes third multiple access indication information, where the third multiple access indication information includes any one of a multiple access registration indication, a multiple access permission indication, and a multiple access status indication;
  • the multiple access registration indication is used to indicate that the user equipment is in multiple access registration in the first communication network and the second communication network, where the multiple access permission indication is used to indicate that the user equipment is allowed to access the first a communication network and the second communication network, the multiple access status indication is used to indicate that the user equipment accesses the first communication network and the second communication network at the same time.
  • the mobility management function entity is selected by the access network device according to the identifier information.
  • an embodiment of the present invention provides a connection processing method in a multiple access scenario, including:
  • the session management function entity receives a second transmission message sent by the mobility management function entity, where the second transmission message includes a permanent identifier of the user equipment and PDU session establishment request information, where the PDU session establishment request information includes the session identifier and the location a second multiple access indication information, where the second multiple access indication information is used to indicate that the user equipment requests to establish a multiple access PDU session for the session service corresponding to the session identifier;
  • the session management function entity establishes a multiple access session for the session service corresponding to the session identifier according to the PDU session establishment request information.
  • the establishment of a multi-access PDU session can be achieved by the connection processing method in the multiple access scenario provided by the third aspect.
  • connection processing method in the multiple access scenario provided by the third aspect the establishment of the multiple access session can be performed.
  • the session management function entity before the establishing a multiple access session for the session service corresponding to the session identifier, according to the PDU session establishment request information, the method also includes:
  • the session management function entity acquires subscription information of the user equipment based on the permanent identifier of the user equipment;
  • the session management function entity determines, according to the session service subscription data in the subscription information, that the session service corresponding to the session identifier allows a multi-access PDU session to be established.
  • the second transmission message further includes a third multiple access indication
  • the session management function entity determines, according to the third multiple access indication information, that the session service corresponding to the session identifier is allowed to establish a multi-access PDU session.
  • the method further includes:
  • the session management function entity initiates a PDU session creation or update process to the user plane function entity UPF, where the PDU session new or update process includes the session management function entity sending a PDU session new or update request message, the PDU session is newly created or The update request message is used to instruct the UPF to create a tunnel identifier corresponding to the access network side of the second communication network for the session service.
  • the session management function entity if the session management function entity is determined according to the session service subscription data in the subscription information The session service corresponding to the session identifier is not allowed to establish a multi-access PDU session, and the method further includes:
  • the session management function entity initiates a PDU session update or a new process to the UPF, where the PDU session update process includes the session management function entity sending a PDU session update or a new request message, where the PDU session update or new request message is used to indicate
  • the UPF updates the access network side tunnel identifier of the session service, and the access network side tunnel identifier that updates the session service includes storing a tunnel identifier corresponding to the access network side of the second communication network, and deleting or updating A tunnel identifier corresponding to the access network side of the first communication network.
  • the method further includes: the session management function entity sends the user plane function entity UPF Corresponding relationship between the access type information and the access network side tunnel identifier; or the session management function entity sends the correspondence between the access type information and the access network side tunnel identifier to the UPF, and the forwarding rule of the data packet;
  • the forwarding rule of the data packet includes a correspondence between the data flow description information and the access type information.
  • the method further includes: the session management function entity to the mobility management function The entity sends the fifth multiple access indication information and the session identifier, where the fifth multiple access indication information is used to indicate that the session corresponding to the session identifier is a multiple access PDU session.
  • the method further includes: the session management function entity sends the policy control function entity PCF The seventh multiple access indication information, the session identifier, and the access type information, where the seventh multiple access indication information is used to indicate that the PDU session corresponding to the session identifier is a multiple access PDU session; or the session The management function entity sends a fourth transmission message to the PCF, where the fourth transmission message includes the session identifier, access type information of the first communication network, and access type information of the second communication network, the first communication
  • the access type information of the network and the access type information of the second communication network are used to indicate that the PCF stores the binding of the session identifier with the access type information of the first communication network and the access type information of the second communication network. relationship.
  • the embodiment of the present invention provides a connection processing method in a multiple access scenario, including:
  • the user equipment When the user equipment registers successfully in the first communication network and needs to register in the second communication network, the user equipment sends a registration request message or parameter to the access network device of the second communication network, where the registration request message or parameter is The first multiple access indication information and the identification information are included;
  • the first multiple access indication information is used by the network side access and the mobility management function entity.
  • the mobility management function entity performs the user equipment according to the first multiple access indication information and the identifier information.
  • the registration of the second communication network is used to select at least one of the network function entity and the context information of the user equipment.
  • the registration request message or parameter further includes second multiple access indication information, where the second multiple access indication information is used by the user After the device successfully registers with the second communication network, the session management function entity establishes a multiple access session according to the second access indication information.
  • the identification information may include at least one of a temporary identifier of the user equipment and network slice selection assistance information, in combination with any one of the foregoing aspects, or any one of the foregoing possible implementation manners.
  • the first multiple access indication information includes at least one of multiple access capability indication information and location area registration indication information.
  • an embodiment of the present invention provides a mobility management function entity, where the mobility management function entity has a function of implementing an activity of a mobility management function entity in the foregoing method embodiment.
  • This function can be implemented in hardware or in hardware by executing the corresponding software.
  • the hardware or software includes one or more modules corresponding to the functions described above.
  • an embodiment of the present invention provides a mobility management function entity, including: a processor, a memory, a bus, and a communication interface; the memory is configured to store a computer execution instruction, and the processor is connected to the memory through the bus.
  • the processor when executed by the processor, executes the computer-executed instructions stored by the memory to cause the mobility management function entity to perform multiple access according to any one of the foregoing first aspect or the second aspect The connection processing method in the scene.
  • an embodiment of the present invention provides a computer readable storage medium, configured to store computer software instructions used by the mobility management function entity, when executed on a computer, to enable the computer to perform the first aspect.
  • the connection processing method in the multiple access scenario of any one of the second aspect or the second aspect.
  • an embodiment of the present invention provides a computer program product comprising instructions, which when executed on a computer, enable the computer to perform multiple access according to any one of the above first aspects or the second aspect The connection processing method in the scene.
  • the ninth aspect, the embodiment of the present invention provides a session management function entity, which has the function of implementing the behavior of the session management function entity in the foregoing method embodiment.
  • This function can be implemented in hardware or in hardware by executing the corresponding software.
  • the hardware or software includes one or more modules corresponding to the functions described above.
  • an embodiment of the present invention provides a session management function entity, including: a processor, a memory, a bus, and a communication interface; the memory is configured to store a computer execution instruction, and the processor is connected to the memory through the bus, when When the session management function entity is running, the processor executes the computer execution instruction stored in the memory to cause the session management function entity to perform the connection processing method in the multiple access scenario according to any of the above third aspects.
  • an embodiment of the present invention provides a computer readable storage medium, configured to store computer software instructions used by the session management function entity, when executed on a computer, to enable the computer to perform the foregoing third aspect.
  • the embodiment of the present invention provides a computer program product including instructions, which when executed on a computer, enable the computer to perform the connection processing method in the multiple access scenario of any of the above third aspects .
  • an embodiment of the present invention provides a user equipment, where the user equipment has a function of implementing a behavior of a session management function entity in the foregoing method embodiment.
  • This function can be implemented in hardware or in hardware by executing the corresponding software.
  • the hardware or software includes one or more modules corresponding to the functions described above.
  • an embodiment of the present invention provides a user equipment, including: a processor, a memory, a bus, and a communication interface; the memory is configured to store a computer execution instruction, and the processor is connected to the memory through the bus, when the user When the device is running, the processor executes the computer-executed instructions stored in the memory to cause the user equipment to perform the connection processing method in the multiple access scenario according to any of the above fourth aspects.
  • the embodiment of the present invention provides a communication system, comprising the mobility management function entity according to the sixth aspect, and the session management function entity according to the tenth aspect.
  • the embodiment of the present invention provides a connection processing method in a multiple access scenario, including:
  • the session management function entity receives a second transmission message sent by the mobility management function entity, the second transmission message includes a multiple access PDU session parameter, and the multiple access PDU session parameter includes a PDU session establishment request message, the PDU session
  • the establishment request message includes a second multiple access indication information and a session identifier, or the multiple access PDU session parameter includes a third multiple access indication information and the session identifier;
  • the session management function entity establishes a multi-access PDU session for the user equipment according to the multiple access PDU session parameter;
  • the second multiple access indication information is used to indicate that the user equipment requests to establish a multiple access PDU session for the session service corresponding to the session identifier
  • the third multiple access indication information is used to indicate that the permission is allowed.
  • the session service corresponding to the session identifier establishes a multi-access PDU session.
  • the method before the session management function entity establishes a multiple access PDU session for the user equipment according to the multiple access PDU session parameter, the method also includes:
  • the session management function entity acquires subscription information of the user equipment
  • the session management function entity establishes a multi-access PDU session for the session service corresponding to the session identifier according to at least one of the subscription information or the policy information or the second multiple access indication information or the third multiple access indication information. .
  • the method further includes:
  • the session management function entity sends a session new or update message to the user plane function entity UPF, where the session new or update message is used to indicate that the UPF creates a tunnel identifier corresponding to the access network side of the second communication network for the session service. .
  • the session management function entity when configured according to the session service in the subscription information The subscription data is determined that the session service corresponding to the session identifier is not allowed to establish a multi-access PDU session, and the method further includes:
  • the session management function entity sends a session new or update message to the UPF, where the session update or new message is used to instruct the UPF to update the access network side tunnel identifier of the session service, where the update of the session service is performed.
  • the network side tunnel identifier includes storing a tunnel identifier corresponding to the access network side of the second communication network, and deleting or updating the tunnel identifier corresponding to the access network side of the first communication network.
  • the method further includes:
  • the session management function entity searches for a UPF corresponding to the PDU session based on the session identifier
  • the session management function entity sends a session new or update message to the user plane function entity UPF, including:
  • the session management function entity selects an N3 interface UPF or an uplink classification UPF or a branch point UPF or an anchor UPF in the UPF to send the session new or update message.
  • the method further includes:
  • the session management function entity sends a fourth multiple access indication information and/or access type information to the UPF, where the fourth multiple access indication information and/or access type information is used to indicate that the first communication network and the first The access network side tunnel identifier of the second communication network.
  • the method further includes:
  • the session management function entity sends a correspondence between the access type information and the tunnel identifier to the UPF; or
  • the forwarding rule of the data packet includes a correspondence between the data flow description information and the access type information.
  • the method further includes:
  • the session management function entity sends a fifth multiple access indication information and a session identifier to the mobility management function entity, where the fifth multiple access indication information is used to indicate that the session service corresponding to the session identifier is multiple access PDU session.
  • the method further includes:
  • the session management function entity sends a seventh multiple access indication information, a session identifier, and an access type information to the PCF, where the seventh multiple access indication information is used to indicate that the PDU session corresponding to the session identifier is a multiple access PDU. Conversation; or,
  • the session management function entity sends a fourth transmission message to the PCF, where the fourth transmission message includes a session identifier, access type information of the first communication network, and access type information of the second communication network, where the fourth The transmission message is used to instruct the PCF to store a binding relationship between the session identifier and access type information of the first communication network and access type information of the second communication network.
  • the embodiment of the present invention provides a connection processing method in a multiple access scenario, including:
  • the user equipment initiates registration in the first communication network and the second communication network; after the registration is successful, the user equipment sends a non-access stratum message to the core network device, where the non-access stratum message includes multiple access PDU session parameters. ;
  • the multi-access PDU session parameter is used to indicate that the user equipment requests to establish a multi-access PDU session.
  • the multiple access PDU session parameter includes a second multiple access indication information and a session identifier, where the second multiple access indication The information is used to indicate that the user equipment requests to establish a multi-access PDU session for the session corresponding to the session identifier; or
  • the multiple access PDU session parameter includes a multiple access PDU session identifier list, the multiple access PDU session identifier list includes at least one session identifier, and the multiple access PDU session identifier list is used to indicate that the user equipment request is The sessions corresponding to the at least one session identifier respectively establish a multi-access PDU session.
  • the method further includes:
  • the user equipment determines whether the first communication network and the second communication network belong to the same PLMN; and/or, the user equipment determines whether a PDU session has been established in the first communication network or the second communication network.
  • the user equipment sends a non-access stratum message to the core network device, including :
  • the user equipment When the first communication network and the second communication network belong to the same PLMN, the user equipment sends a non-access stratum message to the core network function entity; or
  • the user equipment When the first communication network and the second communication network belong to the same PLMN, and the user equipment has established the PDU session in the first communication network or the second communication network, the user equipment provides the core network function The entity sends a non-access stratum message.
  • the user equipment sends a non-access stratum message to the core network device, including :
  • the user equipment When the user equipment determines that the established PDU session is in the connected state, the user equipment sends a non-access stratum transmission message to the core network functional entity, where the multi-access PDU session parameter includes the second multi-access indication information and the session. logo.
  • the user equipment sends a non-access stratum message to the core network device, including :
  • the user equipment When the user equipment determines that the established PDU session is in an inactive state, the user equipment sends the service request message to the core network device, where the service request message includes the multiple access PDU session identifier list.
  • the above core network device may include a mobility management function entity or a session management function entity.
  • the embodiment of the present invention provides a connection processing method in a multiple access scenario, including:
  • the user plane function entity UPF receives the fourth multiple access indication information sent by the session management function entity SMF;
  • the UPF stores, according to the fourth multiple access indication information, an access network side tunnel identifier of the first communication network and an access network side tunnel identifier of the second communication network for the PDU session.
  • the method further includes:
  • the UPF receives a correspondence between the access type information sent by the SMF and the access network side tunnel identifier, and the UPF stores a correspondence between the access type information and an access network side tunnel identifier, where the access network
  • the side tunnel identifier includes an access network side tunnel identifier of the first communication network or an access network side tunnel identifier of the second communication network.
  • the method further includes:
  • the UPF receives a forwarding rule of the data packet sent by the SMF, where the forwarding rule of the data packet includes a correspondence between the data flow description information and the access type information, where the UPF stores the data flow description information and the access type information.
  • the UPF sends the data packet to the access corresponding to the access type information according to the access type information corresponding to the data packet and the correspondence between the access type information and the access network side tunnel identifier. Network side tunnel.
  • the embodiment of the present invention provides a connection processing method in a multiple access scenario, including:
  • the user plane function entity UPF receives the access type information sent by the session management function entity SMF;
  • the UPF stores, according to the access type information, a correspondence between the access network side tunnel identifier and the access type information for the PDU session, where the access network side tunnel identifier includes the access network of the first communication network.
  • the method further includes:
  • the UPF receives a forwarding rule of the data packet sent by the SMF, where the forwarding rule of the data packet includes a correspondence between the data flow description information and the access type information, where the UPF stores the data flow description information and the access type information.
  • the embodiment of the present invention provides a session management function entity, where the session management function entity has the function of implementing the behavior of the session management function entity in the foregoing method embodiment.
  • This function can be implemented in hardware or in hardware by executing the corresponding software.
  • the hardware or software includes one or more modules corresponding to the functions described above.
  • an embodiment of the present invention provides a session management function entity, including: a processor, a memory, a bus, and a communication interface; the memory is configured to store a computer execution instruction, and the processor is connected to the memory through the bus.
  • the processor executes the computer execution instruction stored in the memory, so that the session management function entity performs a connection processing method in a multiple access scenario according to any one of the sixteenth aspects above. .
  • an embodiment of the present invention provides a computer readable storage medium, configured to store computer software instructions used by the session management function entity, when executed on a computer, to enable the computer to execute the tenth A connection processing method in a multiple access scenario of any of the six aspects.
  • an embodiment of the present invention provides a computer program product comprising instructions, which when executed on a computer, enable the computer to perform the connection in the multiple access scenario of any of the sixteenth aspects above Approach.
  • the embodiment of the present invention provides a user equipment, including:
  • a registration module configured to initiate registration in the first communication network and the second communication network
  • a processing module configured to send, by the sending module, a non-access stratum message to the core network device after the registration is successful, where the non-access stratum message includes a multi-access PDU session parameter, where the multi-access PDU session parameter And used to instruct the user equipment to request to establish a multi-access PDU session.
  • the multiple access PDU session parameter includes a second multiple access indication information and a session identifier, where the second multiple connection
  • the instructing information is used to indicate that the user equipment requests to establish a multi-access PDU session for the session corresponding to the session identifier;
  • the multiple access PDU session parameter includes a multiple access PDU session identifier list, the multiple access PDU session identifier list includes at least one session identifier, and the multiple access PDU session identifier list is used to indicate that the user equipment request is The sessions corresponding to the at least one session identifier respectively establish a multi-access PDU session.
  • the processing module is further configured to send to a core network functional entity Before the non-access stratum message, determining whether the first communication network and the second communication network belong to the same PLMN; and/or determining that a PDU session has been established in the first communication network or the second communication network.
  • an embodiment of the present invention provides a user equipment, including: a processor, a memory, a bus, and a communication interface; the memory is configured to store a computer execution instruction, and the processor is connected to the memory through the bus, when When the user equipment is in operation, the processor executes the computer-executed instruction stored in the memory to cause the user equipment to perform the connection processing method in the multiple access scenario according to any one of the above seventeenth aspects.
  • an embodiment of the present invention provides a computer readable storage medium for storing computer software instructions used by the user equipment, when the computer is running on a computer, so that the computer can execute the above seventeenth aspect
  • an embodiment of the present invention provides a computer program product comprising instructions, which when executed on a computer, enable the computer to perform the connection in the multiple access scenario of any of the above seventeenth aspects Approach.
  • an embodiment of the present invention provides a user plane function entity, where the user plane function entity has a function of implementing a user plane function entity behavior in the foregoing method embodiment.
  • This function can be implemented in hardware or in hardware by executing the corresponding software.
  • the hardware or software includes one or more modules corresponding to the functions described above.
  • an embodiment of the present invention provides a user plane function entity, including: a processor, a memory, a bus, and a communication interface; the memory is configured to store a computer execution instruction, and the processor is connected to the memory through the bus.
  • the processor executes the computer execution instruction stored in the memory, so that the user plane function entity performs the multi-connection according to any one of the above eighteenth aspects or the nineteenth aspect. The connection processing method into the scene.
  • an embodiment of the present invention provides a computer readable storage medium, configured to store computer software instructions used by the user plane functional entity, and when executed on a computer, enable the computer to execute the foregoing eighteenth A method of connection processing in a multiple access scenario according to any one of the nineteenth aspects.
  • the embodiment of the present invention provides a computer program product comprising instructions, which when executed on a computer, enable the computer to perform any one of the eighteenth aspect or the nineteenth aspect Connection processing method in multiple access scenarios.
  • connection processing method and apparatus in the multiple access scenario of the embodiment of the present invention may implement that the user equipment reconnects to the second communication network after the first communication network is successfully registered, thereby implementing the user equipment in the first communication network and the second communication.
  • FIG. 1 is a schematic structural diagram of a communication system 100 according to an embodiment of the present invention.
  • FIG. 2 is a schematic structural diagram of another system according to an embodiment of the present invention.
  • FIG. 3 is a schematic structural diagram of an AMF 200 according to an embodiment of the present disclosure.
  • FIG. 4 is a flowchart of a connection processing method in a multiple access scenario according to an embodiment of the present invention
  • FIG. 5 is a flowchart of a connection processing method in another multiple access scenario according to an embodiment of the present invention.
  • FIG. 6 is a flowchart of a connection processing method in another multiple access scenario according to an embodiment of the present invention.
  • FIG. 7 is a flowchart of a connection processing method in another multiple access scenario according to an embodiment of the present invention.
  • FIG. 8 is a flowchart of a connection processing method in another multiple access scenario according to an embodiment of the present invention.
  • FIG. 9 is a schematic structural diagram of a mobility management function entity according to an embodiment of the present invention.
  • FIG. 10 is a schematic structural diagram of a session management function entity according to an embodiment of the present invention.
  • FIG. 11 is a schematic structural diagram of a user equipment according to an embodiment of the present invention.
  • FIG. 12 is a schematic structural diagram of another system according to an embodiment of the present invention.
  • FIG. 13 is a flowchart of a connection processing method in another multiple access scenario according to an embodiment of the present invention.
  • FIG. 14 is a flowchart of a connection processing method in another multiple access scenario according to an embodiment of the present invention.
  • FIG. 15 is a schematic structural diagram of another user equipment according to an embodiment of the present invention.
  • FIG. 16 is a schematic structural diagram of another user plane function entity according to an embodiment of the present invention.
  • FIG. 17 is a schematic structural diagram of another session management function entity according to an embodiment of the present invention.
  • FIG. 1 is a schematic structural diagram of a communication system 100 according to an embodiment of the present invention.
  • the communication system 100 of this embodiment may include a mobility management function entity 101 and a session management function entity 102, where mobility management functions are provided.
  • the entity 101 is in communication with the session management function entity 102.
  • the mobility management function entity 101 can determine, according to the first multiple access indication information and the identification information, that the user equipment is registered in the first communication network and initiates registration in the second communication network.
  • the user equipment registers multiple accesses in the first communication network and the second communication network to meet the requirement for the user equipment to register in the first communication network and the second communication network.
  • the session management function entity 102 may receive the second transmission message sent by the mobility management function entity 101, where the second transmission message includes the permanent identifier of the user equipment and PDU session establishment request information, the PDU session establishment request information includes the session identifier and the second multiple access indication information, and the second multiple access indication information is used to indicate that the user equipment requests the session And identifying the corresponding session service to establish a multiple access PDU session, and the session management function entity 102 establishes a multiple access session for the session service corresponding to the session identifier according to the PDU session establishment request information, so that the establishment of the multiple access session can be implemented.
  • the system shown in FIG. 1 may further include a user equipment, an access network device of the second communication network, and the like, where the user equipment is successfully registered in the first communication network and needs to be registered in the second communication network.
  • the access network device of the second communication network sends a registration request message, where the registration request message specifically includes the first multiple access indication information and the identification information, and the access network device selects the mobility management of the first communication network according to the identification information.
  • the function entity 101, the access network device sends the first transmission message to the mobility management function entity 101, where the first transmission message includes a registration request message and access type indication information, and the mobility management function entity 101
  • the first transmission message is received to implement multi-access registration of the user equipment in the first communication network and the second communication network.
  • the first transmission message may further include the foregoing PDU session establishment request information to implement establishment of a multiple access session.
  • the mobility management function entity, the session management function entity, and the like in the system shown in FIG. 1 are only one name, and the name is not limited to the device itself.
  • the network element or the entity corresponding to the mobility management function entity and the session management function entity may be other names, which are not specifically limited in the embodiment of the present invention.
  • the mobility management function entity may be replaced by a mobility management function or mobility management, etc.
  • the session management function entity may also be replaced with a session management function or session management, etc. No longer.
  • the specific manifestation of the mobility management function entity in the 5G network may be a Core Access and Mobility Management Function (AMF), and the specific expression of the session management function entity may be a session management function entity. (Session Management Function, SMF).
  • AMF Core Access and Mobility Management Function
  • SMF Session Management Function
  • the system architecture shown in FIG. 2 may be a specific representation of the communication system shown in FIG. 1.
  • the system architecture of this embodiment may be It is called a 5G network architecture.
  • the network architecture can support the wireless network (such as LTE, 5G RAN, etc.) defined by the 3GPP standard group to access the core network.
  • the core network side of the embodiment of the present invention can be called the 5G core network side (5G Core). Network), and supports non-3GPP access technology through non-3GPP Interworking Function (N3IWF) or next generation packet data gateway (ngPDG) or fixed network access gateway or The non-3GPP access gateway accesses the core network side.
  • N3IWF non-3GPP Interworking Function
  • ngPDG next generation packet data gateway
  • the non-3GPP access gateway accesses the core network side.
  • the system architecture of the embodiment of the present invention supports the UE accessing the 5G core network side through different access technologies.
  • the core network functions are divided into a user plane function element (UPF) and a control plane network element (CPF).
  • the user plane network element functional entity is mainly responsible for packet data packet forwarding, QoS control, or accounting information statistics.
  • the control plane network element function entity is mainly responsible for user registration authentication, mobility management, sending a packet forwarding policy to the user plane (UPF), or a QoS control policy.
  • the CPF can be further subdivided into a Core Access and Mobility Management Function (AMF) and a Session Management Function (SMF).
  • AMF Core Access and Mobility Management Function
  • SMF Session Management Function
  • the AMF is responsible for the registration process when the user accesses and the location management during the user's movement.
  • the SMF is responsible for establishing a corresponding session connection on the core network side when the user initiates the service, and providing specific services for the user.
  • the core network side may also include an independent Authentication Server Function (AUSF), which is responsible for authenticating the authenticity of the user based on the authentication vector in the user subscription data when the user registers.
  • the user subscription data is stored in a Subscriber/User Data Management (SDM/UDM), where the authentication-related key and the authentication vector are stored in an Authentication Credential Repository and Processing Function (Authentication Credential Repository and Processing Function, ARPF).
  • SDM/UDM Subscriber/User Data Management
  • ARPF Authentication Credential Repository and Processing Function
  • the access technology of the first communication network or the access technology of the second communication network includes: 3GPP access technology, non3GPP access technology, fixed network access technology (or fixed network access technology, wired access technology), WLAN access Incoming technology, trusted WLAN access technology, non-trusted WLAN access technology, 5G RAN access technology, LTE access technology, etc.
  • the foregoing access technology may be indicated by access type information or wireless access type information.
  • the access type information may also be referred to as access type indication information.
  • the UE may be connected to the AMF through the RAN and/or the N3IWF, the AMF is connected to the SMF, the SDM/UDM, and the ARPF, the SMF is connected to the UPF, and the UPF is connected to the Data Network (DN).
  • the DN may be the Internet or an IMS network.
  • the interfaces and connections in the system architecture include: NG1, NG2, NG3, NG4, and NG11.
  • the NG1 is a control plane connection between the user equipment and the AMF, and is used for transmitting control signaling between the user equipment and the control plane of the core network.
  • the message in the specific NG1 connection may be a connection between the UE and the RAN, and the RAN.
  • the NG2 connection between the AMF and the AMF is transmitted, or may be transmitted by a connection between the UE and the N3IWF, and an NG2 connection between the N3IWF and the AMF.
  • NG2 is a control plane connection between the RAN and the AMF, and a control plane connection between the N3IWF and the AMF is used for transmitting control signaling between the core network control plane and the RAN or N3IWF, and between the UE and the core network control plane.
  • NG3 is a connection between the RAN, the N3IWF, and the user plane function, and is used to support a Protocol Data Unit (PDU) session connection established for the user equipment.
  • NG4 is the connection between the SMF and the user plane function to convey control signaling between the SMF and the user plane functions.
  • NG11 is a connection between AMF and SMF for transmitting control information related to session services.
  • the AMF, the SMF, and the UE shown in FIG. 2 may perform the steps of the following method embodiments to implement the UE to connect to the 3GPP side after the non-3GPP registration succeeds, and the network side may implement the UE on the 3GPP side and the non- - 3GPP side registration.
  • the network side can implement multiple registrations of the UE on the 3GPP side and the non-3GPP side when the UE is reconnected to the non-3GPP side after the 3GPP is successfully registered.
  • the multi-access session establishment can be simultaneously implemented on the premise that the UE is multi-registered, the session establishment delay is saved, and the user service experience is effectively improved.
  • the AMF, the SMF, the UPF, and the like in the system architecture shown in FIG. 2 may have other functions in addition to the functions in the embodiments of the present invention, which are not specifically limited in the embodiment of the present invention.
  • the Radio Access Network (RAN) device involved in this document is a device that connects a terminal to a wireless network, and may be a Global System of Mobile communication (GSM) or Base Transceiver Station (BTS) in Code Division Multiple Access (CDMA), or base station (NodeB, NB) in Wideband Code Division Multiple Access (WCDMA). It may be an evolved base station (Evolutional Node B, eNB or eNodeB) in a Long Term Evolution (LTE), or a relay station or an access point, or a base station in a future 5G network, and the like, which is not limited herein.
  • GSM Global System of Mobile communication
  • BTS Base Transceiver Station
  • CDMA Code Division Multiple Access
  • NodeB, NB base station
  • WCDMA Wideband Code Division Multiple Access
  • It may be an evolved base station (Evolutional Node B, eNB or eNodeB) in a Long Term Evolution (LTE), or a relay station or an access point, or a
  • the User Equipment may represent any applicable end user equipment, and may include (or may represent) a wireless transmit/receive unit (WTRU), a mobile station, a mobile node, Mobile devices, fixed or mobile contracting units, pagers, mobile phones, personal digital assistants (PDAs), smart phones, notebook computers, computers, touch screen devices, wireless sensors or consumer electronics devices.
  • WTRU wireless transmit/receive unit
  • a "mobile" station/node/device herein refers to a station/node/device connected to a wireless (or mobile) network and is not necessarily related to the actual mobility of the station/node/device.
  • a plurality refers to two or more. "and/or”, describing the association relationship of the associated objects, indicating that there may be three relationships, for example, A and/or B, which may indicate that there are three cases where A exists separately, A and B exist at the same time, and B exists separately.
  • the character "/" generally indicates that the contextual object is an "or" relationship.
  • non-3GPP access gateway in the embodiment of the present invention may be the foregoing N3IWF, or may be an ngPDG, and may also be another name that supports the non-3GPP access. .
  • the multiple access registration in the embodiment of the present invention may also be referred to as a multi-area registration, that is, the “multi-access” may be replaced by a “multi-region”, which is not limited in the embodiment of the present invention.
  • first transmission message and the “second transmission message” involved in the example of the present invention are only used to distinguish transmission messages of different interfaces, and the message names are not limited thereto.
  • FIG. 3 is a schematic structural diagram of an AMF 200 according to an embodiment of the present invention.
  • the AMF 200 includes: at least one processor 201, at least one network interface 203, a memory 204, and at least one communication bus 202.
  • Communication bus 202 is used to implement connection communication between these components.
  • Memory 204 can include read only memory and random access memory and provides instructions and data to processor 201.
  • a portion of memory 204 may also include non-volatile random access memory (NVRAM).
  • NVRAM non-volatile random access memory
  • the processor 201 is configured to perform the steps of the following method embodiments by using the program or the instruction stored in the memory 204, so that the user equipment can be connected to the second connection again after the first communication network is successfully registered.
  • the communication network further implements multi-access registration of the user equipment in the first communication network and the second communication network to meet the requirement of the user equipment to register in the first communication network and the second communication network, and the specific implementation process can be referred to the following Method embodiment.
  • AMF in the embodiment of the present invention may also be implemented by using Network Function Virtualization (NFV) technology.
  • NFV Network Function Virtualization
  • the AMF, the SMF, and the UPF in the embodiments of the present invention may be implemented by one physical device, or may be implemented by multiple physical devices, which is not specifically limited in this embodiment of the present application. That is, it can be understood that the AMF, the SMF, the UPF, and the like in the embodiment of the present invention may be a logical function module in the physical device, or may be a logical function module composed of multiple physical devices, which is implemented by the present invention. This example does not specifically limit this.
  • the "first communication network” and the “second communication network” referred to herein are only used to distinguish different communication networks, wherein the “first communication network” is used to indicate the network that the UE has registered, and the “second communication network” is used. After indicating that the UE has registered to the first communication network, the registered network to another communication network.
  • the first communication network and the second communication network may be the same core network of different access networks. As shown in FIG. 2, the UE may access the core network through different access network devices.
  • the first communication network is a 3GPP network
  • the access network device of the first communication network is a RAN device
  • the second communication network is a Non-3GPP network
  • the access network device of the second communication network is N3IWF.
  • the second communication network is a 3GPP network
  • the access network of the second communication network is a RAN.
  • FIG. 4 is a flowchart of a connection processing method in a multiple access scenario according to an embodiment of the present invention. As shown in FIG. 4, the method in this embodiment may include:
  • Step 101 When the user equipment registers successfully in the first communication network and needs to register in the second communication network, the user equipment sends a registration request message or parameter to the access network device of the second communication network.
  • the access network device of the second communication network receives the registration request message or parameter.
  • the registration request message or the parameter may specifically include the first multiple access indication information and the identifier information.
  • the first multiple access indication information is used by the AMF to perform registration of the user equipment in the second communication network according to the first multiple access indication information and the identifier information, where the identifier information is used.
  • the identifier information may be a temporary identifier (Temporary ID), and the temporary identifier information may be a temporary user ID (Temporary User ID) or a temporary device ID (Temporary UE ID). Of course, it can be other information, and no longer one by one.
  • the temporary identification information includes AMF information, such as an AMF device identifier. For example, if the UE has registered to the network through non-3GPP before the UE establishes a connection with the RAN side, the temporary identifier is a temporary identifier assigned by the network side acquired by the UE from the non-3GPP side.
  • the temporary identifier is a temporary identifier allocated by the network side acquired by the UE from the 3GPP side.
  • the access network device If the user equipment sends the parameter to the access network device of the second communication network, and the access network device of the second communication network receives the parameter, the access network device generates the registration request according to the parameter. Message.
  • Step 102 The access network device selects an AMF of the first communication network according to the identifier information.
  • the access network device needs to determine the AMF according to the identification information, where the AMF is The AMF registered by the user equipment in the first communication network, where the AMF stores the context information and the subscription information of the UE.
  • Step 103 The access network device sends a first transmission message to the AMF.
  • the AMF receives the first transmission message sent by the access network device.
  • the first transmission message may be a first transmission message or other information, which is not limited by the embodiment of the present invention.
  • the first transmission message includes a registration request message and a radio access type (RAT type) information.
  • the registration request message is the registration request message sent by the user equipment in step 101.
  • the access type indication information is generated by the access network device.
  • the access type indication information is any one of a 3GPP access type, a radio access network RAN access type, or a long term evolution LTE access type.
  • the access type indication information is any one of a non-3GPP access type, a wireless local area network WLAN access type, or a fixed network access type.
  • Step 104 The AMF determines, according to the access type indication information and the identifier information, or the AMF, that the user equipment is in the first communication network according to the first multiple access indication information and the identifier information. Registration and initiation of registration in the second communication network.
  • Step 105 The AMF performs a registration process of the user equipment in the second communication network.
  • the AMF determines that the user equipment is registered in the first communication network and initiates registration in the second communication network, and directly performs step 105 to complete registration of the user equipment in the second communication network, so that the user equipment is in the first
  • the communication network and the second communication network are registered, that is, multiple access registration is implemented.
  • the implementation manner of the foregoing step 104 may specifically include the following three implementation manners:
  • the AMF obtains the context information of the user equipment according to the identifier information, and the AMF determines, according to the context information of the user equipment, that the user equipment is registered in the first communication network, and the AMF is configured according to the The access type indication information determines that the user equipment initiated registration at the second communication network.
  • the first multiple access indication information may include at least one of the multiple access capability indication information and the location area registration indication information
  • the specific implementation of the step 104 is: the AMF obtains according to the identifier information.
  • the context information of the user equipment the AMF determines, according to the context information of the user equipment, that the user equipment is registered in the first communications network, and the AMF is configured according to the multiple access capability indication information or location area registration indication information. Determining that the user equipment initiates registration at the second communication network.
  • the implementation manner that the first multiple access indication information is the multiple access capability indication information may be: setting the UE capability parameter to a multi-access capability indication.
  • the AMF determines, according to the access type indication information, the first multiple access indication information, and the identifier information, that the user equipment is registered in the first communication network and initiated in the second communication network. registered.
  • the user equipment when the first communication network is successfully registered and needs to be registered in the second communication network, the user equipment sends a registration request message to the access network device of the second communication network, where the registration request message specifically includes the first multiple access indication.
  • the access network device selects an AMF of the first communication network according to the identification information, and the access network device sends a first transmission message to the AMF, where the first transmission message includes a registration request message
  • the access type indication information the AMF determining, according to the access type indication information and the identifier information, or the first multiple access indication information and the identifier information, that the user equipment is in the first communication network Registering and initiating the registration of the second communication network, performing the registration process of the user equipment in the second communication network, so that the user equipment can be connected to the second communication network again after the first communication network is successfully registered.
  • FIG. 5 is a flowchart of a connection processing method in another multiple access scenario according to an embodiment of the present invention. As shown in FIG. 5, the method in this embodiment may include:
  • Steps 201 to 204 are the same as steps 101 to 104.
  • steps 101 to 104 For detailed explanation, refer to steps 101 to 104 of the embodiment shown in FIG. 4, and details are not described herein again.
  • Step 205 The AMF determines, according to the subscription information of the user equipment, whether the user equipment is allowed to register in the first communication network and the second communication network. If yes, step 206 is performed; otherwise, step 207 is performed.
  • the AMF may obtain context information of the user equipment, where the context information includes a permanent identifier of the user equipment, where the permanent identifier may be an International Mobile Subscriber Identification Number (IMSI), and the AMF is based on The permanent identifier acquires subscription information of the user equipment, and determines, according to the subscription information, whether the user equipment is allowed to register in the first communication network and the second communication network.
  • IMSI International Mobile Subscriber Identification Number
  • Step 206 The AMF performs a registration process of the user equipment in the second communication network.
  • the AMF completes the registration process of the user equipment in the second communication network, and stores the state in which the user equipment is registered in the first communication network and the second communication network, that is, the user equipment is in the first communication network and the second communication. The status of the network registration at the same time.
  • Step 207 The AMF performs a registration process of the user equipment in the second communications network, and initiates a deregistration process of the user equipment in the first communications network or deletes the user equipment in the first The registration status of the communication network.
  • the AMF performs the registration process of the user equipment in the second communication network, and initiates the user when the user equipment is in the connected state.
  • the deregistration process of the device in the first communication network deletes the registration status of the user equipment in the first communication network when the user equipment is in an idle state.
  • An optional implementation manner is to determine whether the user equipment is allowed to register in the first communication network and the second communication network, and the AMF may determine, according to the subscription information and/or the local configuration information, whether the user equipment is allowed to be in the first The communication network and the second communication network are registered.
  • the local configuration information is specifically a local policy configured by the operator.
  • the local configuration information is not directly related to a single UE.
  • the local configuration information may be a larger granularity control. For example, the carrier configures the roaming user. Allow multiple access registrations, or do not allow users to register multiple accesses in different PLMNs.
  • the AMF may further include sending a registration success message to the UE, and the UE returns a registration completion message to the AMF.
  • the user equipment when the user equipment needs to connect to the second communication network after the first communication network is successfully registered, it is determined whether the user equipment is allowed to be connected in the first communication network and the second communication network according to the subscription information of the user equipment.
  • the registration is entered to meet the requirement of the user equipment to register multiple accesses in the first communication network and the second communication network.
  • the embodiments shown in FIG. 4 and FIG. 5 are used to implement multiple registrations of the user equipment in the first communication network and the second communication network in the multiple access scenario.
  • the embodiment of the present invention may also be used.
  • the registration request message in the embodiment shown in FIG. 4 and FIG. 5 further includes second multiple access indication information, and the AMF completes the user equipment in the second communication network.
  • the establishment of the multiple access session is completed by using the embodiment shown in FIG. 6 below. For details, refer to the explanation of the embodiment shown in FIG. 6.
  • FIG. 6 is a flowchart of a connection processing method in another multiple access scenario according to an embodiment of the present invention. As shown in FIG. 6, the method in this embodiment may include:
  • Step 301 When the user equipment registers successfully in the first communication network and needs to register in the second communication network, the user equipment sends a registration request message or parameter to the access network device of the second communication network.
  • the access network device of the second communication network receives the registration request message or parameter sent by the user equipment.
  • the registration request message or parameter further includes PDU session establishment request information, where the PDU session establishment request information includes second multiple access indication information and a session identifier.
  • the second multiple access indication information is used to indicate that the user equipment requests to establish a multiple access PDU session for the session service corresponding to the session identifier.
  • Step 302 The access network device selects an AMF of the first communication network according to the identifier information.
  • Step 303 The access network device sends a first transmission message to the AMF.
  • the AMF receives the first transmission message sent by the access network device.
  • the first transmission message further includes the PDU session establishment request information on the basis of the foregoing embodiment.
  • Step 304 The AMF determines, according to the access type indication information and the identifier information, or the AMF, that the user equipment is in the first communication network according to the first multiple access indication information and the identifier information. Registration and initiation of registration in the second communication network.
  • Step 305 The AMF performs a registration process of the user equipment in the second communication network.
  • Step 306 The AMF sends a second transmission message to the SMF.
  • the SMF receives the second transmission message sent by the AMF.
  • the second transmission message may be a N11 interface transmission message, or may be another message, which is not limited by the embodiment of the present invention.
  • the second transmission message includes a user equipment permanent identifier and PDU session establishment request information, where the PDU session establishment request information includes a session identifier (PDU session ID) and the second multiple access indication information, and the second multiple connection
  • the instructing information is used to indicate that the user equipment requests to establish a multi-access PDU session for the session service corresponding to the session identifier.
  • Step 307 The SMF acquires subscription information of the user equipment based on the permanent identifier of the user equipment.
  • Step 308 The SMF determines, according to the session service subscription data in the subscription information, whether the session service corresponding to the session identifier is allowed to establish a multi-access PDU session. If yes, step 309 is performed, and if no, step 310 is performed.
  • Step 309 The SMF sends a PDU session new or update request message to the UPF, where the PDU session new or update request message is used to indicate that the UPF creates a tunnel identifier corresponding to the access network side of the second communication network for the session service.
  • a tunnel identifier corresponding to the access network side of the second communication network for the session service.
  • F-TEID IP address-Tunnel Endpoint Identifier
  • the UPF is the UPF stored in the context information of the user equipment, that is, the SMF searches for the UPF corresponding to the same PDU connection of the first communication network according to the PDU session ID, and the UPF newly creates a new or updated request message according to the PDU session for the session service.
  • a tunnel identifier corresponding to the access network side of the second communication network and notifying the tunnel network identifier of the access network device of the second communication network, thereby establishing a tunnel between the access network device of the second communication network and the UPF To achieve multi-access session establishment.
  • Step 310 The SMF sends a PDU session update or a new request message to the UPF, where the PDU session update or the new request message is used to instruct the UPF to update the access network side tunnel identifier of the session service.
  • the UPF receives the PDU session update or the new request message sent by the SMF.
  • the access network side tunnel identifier that updates the session service includes storing a tunnel identifier corresponding to an access network side of the second communication network, and deleting or updating a tunnel corresponding to the access network side of the first communication network.
  • Step 311 The UPF sends a connection setup reply message to the SMF.
  • the SMF receives the connection setup reply message sent by the UPF.
  • the second transmission message further includes third multiple access indication information, where the third multiple access indication information includes multiple access registration indication, multiple access permission indication, and multiple access status indication Any one of the multiple access registration indications for indicating that the user equipment is multi-access registered in the first communication network and the second communication network, the multiple access permission indication is used to indicate that the user is allowed to be The device accesses the first communication network and the second communication network at the same time, and the multiple access status indication is used to indicate that the user equipment accesses the first communication network and the second communication network at the same time .
  • the step 308 is to determine, according to the third multi-access indication information and the session service subscription data in the subscription information, whether the session service corresponding to the session identifier is allowed to establish a multi-access PDU session.
  • multi-access session establishment on the basis of implementing multi-access registration of the user equipment in the first communication network and the second communication network, multi-access session establishment can be further implemented.
  • the embodiment shown in FIG. 4 is explained when the access network device of the first communication network is the N3IWF and the access network device of the second communication network is the RAN device.
  • FIG. 7 is a flowchart of a connection processing method in another multiple access scenario according to an embodiment of the present invention. As shown in FIG. 7, the method in this embodiment may include:
  • the UE When the UE successfully registers with the Non-3GPP network and needs to register with the 3GPP network, the UE sends a registration request message to the RAN device.
  • the RAN device receives a registration request message sent by the UE.
  • the registration request message may include the first multiple access indication information and the identification information.
  • the RAN device selects an AMF of the Non-3GPP network according to the identifier information.
  • the RAN device sends a first transmission message to the AMF.
  • the AMF receives the first transmission message sent by the RAN device.
  • the first transmission message includes a registration request message and a radio access type (RAT type) information.
  • RAT type radio access type
  • the AMF determines, according to the access type indication information and the identifier information, or the AMF, according to the first multiple access indication information and the identifier information, that the UE is registered in the Non-3GPP network and initiates registration in the 3GPP network.
  • the UE and the network side complete two-way authentication and authentication.
  • the AMF determines, according to the subscription information of the UE, whether to allow the UE to register in the Non-3GPP network and the 3GPP network. If yes, execute S407. Otherwise, execute S408.
  • the AMF performs a registration process of the UE in the 3GPP network.
  • the AMF performs a registration process of the UE in the 3GPP network, and initiates a deregistration process of the UE in the Non-3GPP network or deletes a registration status of the UE in the Non-3GPP network.
  • the specific implementation manner of initiating the de-registration process of the UE in the Non-3GPP network or deleting the registration status of the UE in the Non-3GPP network may be: the AMF sends a de-registration request message to the N3IWF, where the de-registration request message may include the UE permanent identifier. Or the temporary identification information or the like, the N3IWF deletes the context information of the UE based on the deregistration request message, releases the connection with the UPF, and sends a registration response message to the AMF.
  • the UE determines whether to allow the UE to register multiple access in the 3GPP network and the Non-3GPP network according to the subscription information of the UE, so as to satisfy the UE in the 3GPP.
  • Network and Non-3GPP network multi-access registration requirements when the UE needs to connect to the 3GPP network after the registration of the Non-3GPP network is successful, the UE determines whether to allow the UE to register multiple access in the 3GPP network and the Non-3GPP network according to the subscription information of the UE, so as to satisfy the UE in the 3GPP. Network and Non-3GPP network multi-access registration requirements.
  • the embodiment shown in FIG. 4 is explained when the access network device of the first communication network is the RAN device and the access network device of the second communication network is the N3 IWF.
  • FIG. 8 is a flowchart of a connection processing method in another multiple access scenario according to an embodiment of the present invention.
  • a UE first establishes a connection with a network side through a 3GPP access network (such as a RAN), and completes the UE to the network.
  • the registration process of the side, the subsequent UE establishes a connection with the non-3GPP access network (such as the WLAN access network), and initiates the registration process of the non-3GPP side.
  • the method in this embodiment may include:
  • the UE discovers a non-3GPP access network, and the UE establishes a wireless connection with the non-3GPP access network.
  • the UE initiates a non-3GPP side registration process, and generates a registration related parameter.
  • the registration related parameter may include first multiple access indication information and identification information.
  • the registration-related parameters further include the PDU connection request information, and the PDU connection request information can be specifically explained in the explanation example of the embodiment shown in FIG. 5.
  • the UE sends an IKE_SA_INIT initial connection setup message to the N3IWF.
  • the N3IWF receives the IKE_SA_INIT initial connection setup message sent by the UE.
  • the IKE_SA_INIT initial connection setup message is used to negotiate an IPSec tunnel security-related parameter between the UE and the N3IWF, so that the UE establishes an IPSec tunnel with the N3IWF.
  • the UE sends an IKE_AUTH request message to the N3IWF.
  • the N3IWF receives the IKE_AUTH request message sent by the UE.
  • the IKE_AUTH request message includes registration-related parameters generated by S502.
  • the N3IWF selects the AMF according to the identification information.
  • the N3WIF sends a registration request message (Registration Request) to the AMF.
  • the AMF receives the registration request message sent by the N3WIF.
  • the registration request message is specifically carried in the first transmission message and sent to the AMF.
  • the embodiment of the present invention does not limit the name of the first transmission message including the registration request message.
  • the first transmission message may also be referred to as a NAS Transport message, an Uplink NAS Transport message, or an authentication request message.
  • the registration request message includes registration-related parameters generated in S502.
  • the N3IWF sets the access type Access type to non-3GPP access, or WLAN access, or non-trusted WLAN access, etc. in the first transport message.
  • the AMF performs a registration authentication process of the UE on the non-3GPP side.
  • the network side performs authentication authentication on the UE.
  • the following steps are also required to be performed.
  • the SMF determines, according to the session service subscription data in the subscription information, whether the session service corresponding to the session identifier is allowed to establish a multi-access PDU session. If yes, execute S510. If not, execute step 511.
  • the SMF sends a PDU session new or update request message to the UPF, where the PDU session new or update request message is used to indicate that the UPF creates a tunnel identifier corresponding to the non-3GPP access network side for the session service, such as F-TEID.
  • the UPF receives a PDU session new or update request message sent by the SMF.
  • the SMF sends a PDU session update or a new request message to the UPF, where the PDU session update or the new request message is used to instruct the UPF to update the access network side tunnel identifier of the session service.
  • the UPF receives the PDU session update or the new request message sent by the SMF.
  • the access network side tunnel identifier that updates the session service includes storing a tunnel identifier corresponding to the access network side of the non-3GPP, and deleting or updating the tunnel identifier corresponding to the access network side of the 3GPP.
  • the UE when the UE needs to connect to the Non-3GPP network after the 3GPP network is successfully registered, it is determined whether the UE is allowed to register in the 3GPP network and the Non-3GPP network according to the subscription information of the UE, so as to satisfy the UE in the 3GPP. Network and Non-3GPP network multi-access registration requirements. And further establish a multi-access session establishment.
  • the user equipment implements multiple access registration in the first communication network and the second communication network, and then the session management function entity may also provide the user to the user in the process of establishing a multiple access session.
  • the interface function entity UPF sends a correspondence between the access type information and the access network side tunnel identifier; or the session management function entity sends the access type information to the access network side tunnel identifier corresponding to the access network side, and the data packet And a forwarding rule of the data packet, where the forwarding rule of the data packet includes a correspondence between the data flow description information and the access type information.
  • the user plane function entity may store the correspondence between the access type information and the access network side tunnel identifier, or the storage access type information and the access network side tunnel identifier correspondence relationship, and the data packet forwarding rule, and the stored information may be used. For subsequent data forwarding.
  • the specific user plane function entity refer to the method performed by the user plane function entity in the embodiment shown in FIG. 13 described below.
  • the session management function entity may further send a fifth multiple access indication information and the session identifier to the mobility management function entity, where the fifth multiple access indication information is used to indicate that the session corresponding to the session identifier is Multiple access PDU sessions.
  • the mobility management function entity may mark the session corresponding to the session identifier as a multiple access PDU session according to the fifth multiple access indication information.
  • the session management function entity may further send a seventh multiple access indication information, the session identifier, and access type information to the policy control function entity PCF, where the seventh multiple access indication information is used to indicate that the session identifier corresponds to The PDU session is a multiple access PDU session; or the session management function entity may further send a fourth transport message to the PCF, where the fourth transport message includes the session identifier, an access type of the first communication network Information and access type information of the second communication network, the access type information of the first communication network and the access type information of the second communication network are used to instruct the PCF to store the session identifier and the first communication network The binding relationship between the access type information and the access type information of the second communication network.
  • the specific PCF refer to the method performed by the PCF in the embodiment shown in FIG. 13 described below.
  • the method performed by the session management function entity may refer to the method performed by the session management function entity in the embodiment shown in FIG. 13 described below.
  • FIG. 9 is a schematic structural diagram of a mobility management function entity according to an embodiment of the present invention.
  • the apparatus in this embodiment may include: a receiving module 11, a determining module 12, and a processing module 13, wherein the receiving module 11 And a first transmission message that is sent by the access network device, where the first transmission message includes a registration request message, where the registration request message includes a first multiple access indication information and identifier information, where the identifier information is used to acquire a user.
  • Determining module 12 configured to determine, according to the first multiple access indication information and the identification information, that the user equipment is registered in the first communication network and initiated at the first one of the context information of the device The registration of the second communication network, the processing module 13 is configured to perform a registration process of the user equipment in the second communication network.
  • the determining module 12 is specifically configured to: obtain context information of the user equipment according to the identifier information, and determine, according to the context information of the user equipment, that the user equipment is registered in the first communications network; Determining, according to the first multiple access indication information, that the user equipment initiates registration in the second communication network.
  • the first transmission message further includes access type indication information, where the determining module 12 is specifically configured to: according to the access type indication information, the first multiple access indication information, and the identifier The information determines that the user equipment has been registered with the first communication network and initiated registration with the second communication network.
  • the apparatus of this embodiment may further include: a determining module 14 configured to: before the mobility management function entity performs the registration process of the user equipment in the second communications network Determining, according to the subscription information of the user equipment, that the user equipment is allowed to register in the first communication network and the second communication network.
  • a determining module 14 configured to: before the mobility management function entity performs the registration process of the user equipment in the second communications network Determining, according to the subscription information of the user equipment, that the user equipment is allowed to register in the first communication network and the second communication network.
  • the determining module 14 is further configured to: if it is determined, according to the subscription information or the local configuration information of the user equipment, that the user equipment is not allowed to register in the first communication network and the second communication network, The processing module 13 performs a registration process of the user equipment in the second communication network, and initiates a deregistration process of the user equipment in the first communication network or deletes the user equipment in the first communication. The registration status of the network.
  • the registration request message further includes a second multiple access indication information
  • the mobility management function entity further includes: a sending module 15; the sending module 15 is configured to send the second to the session management function entity Transmitting a message, where the second transmission message includes a permanent identifier of the user equipment and PDU session establishment request information, where the PDU session establishment request information includes a session identifier and a second multiple access indication information, and the second multiple access indication information
  • the user equipment is requested to establish a multi-access PDU session for the session service corresponding to the session identifier.
  • the device in this embodiment may be used to implement the technical solution of the foregoing method embodiment, and the implementation principle and the technical effect are similar, and details are not described herein again.
  • FIG. 10 is a schematic structural diagram of a session management function entity according to an embodiment of the present invention.
  • the apparatus in this embodiment may include: a receiving module 21 and a processing module 22, where the receiving module 21 is configured to receive mobility.
  • a second transmission message sent by the management function entity where the second transmission message includes a permanent identifier of the user equipment and PDU session establishment request information, where the PDU session establishment request information includes a session identifier and a second multiple access indication information
  • the second multiple access indication information is used to indicate that the user equipment requests to establish a multiple access PDU session for the session service corresponding to the session identifier
  • the processing module 22 is configured to use the PDU session establishment request information as the session identifier corresponding to the session identifier.
  • the session service establishes a multi-access session.
  • the session management function entity further includes a determining module 23, where the determining module 23 is configured to establish a multi-access session for the session service corresponding to the session identifier according to the PDU session establishment request information, based on the The permanent identifier of the user equipment acquires the subscription information of the user equipment, and determines that the session service corresponding to the session identifier is allowed to establish a multi-access PDU session according to the session service subscription data in the subscription information.
  • the second transmission message further includes a third multiple access indication, where the processing module 22 is further configured to determine, according to the third multiple access indication information, that the session service corresponding to the session identifier is allowed to be established. Into the PDU session.
  • the session management function entity further includes: a sending module 24, where the sending module 24 is configured to initiate a PDU session creation or update process to the user plane function entity UPF, where the PDU session new or update process includes the session
  • the management function entity sends a PDU session new or update request message, and the PDU session new or update request message is used to instruct the UPF to create a tunnel identifier corresponding to the access network side of the second communication network for the session service.
  • the sending module 24 is further configured to:
  • the UPF initiates a PDU session update or a new process
  • the PDU session update process includes the session management function entity sending a PDU session update or a new request message
  • the PDU session update or new request message is used to instruct the UPF to update the session
  • An access network side tunnel identifier of the service where the access network side tunnel identifier for updating the session service includes storing a tunnel identifier corresponding to an access network side of the second communication network, and deleting or updating the connection with the first communication network Enter the tunnel ID corresponding to the network side.
  • the device in this embodiment may be used to implement the technical solution of the foregoing method embodiment, and the implementation principle and the technical effect are similar, and details are not described herein again.
  • FIG. 11 is a schematic structural diagram of a user equipment according to an embodiment of the present invention.
  • the apparatus in this embodiment may include: a sending module 31 and a processing module 32, where the processing module 32 is used in the first communications network.
  • the sending module 31 sends a registration request message to the access network device of the second communication network, where the registration request message includes the first multiple access indication information and the identifier.
  • the identification information is used to select at least one of a network function entity and context information of the user equipment.
  • the registration request message further includes second multiple access indication information, where the second multiple access indication information is used by the user equipment after the second communication network is successfully registered, and the session management function entity is configured according to the The second access indication information establishes a multiple access session.
  • the device in this embodiment may be used to implement the technical solution of the foregoing method embodiment, and the implementation principle and the technical effect are similar, and details are not described herein again.
  • FIG. 12 is a schematic diagram of another system architecture according to an embodiment of the present invention.
  • the system architecture shown in FIG. 12 may be a specific representation of the communication system shown in FIG. 1.
  • the system architecture of this embodiment may be It is called a 5G network architecture.
  • the network architecture can support the wireless network (such as LTE, 5G RAN, etc.) defined by the 3GPP standard group to access the core network.
  • the core network side of the embodiment of the present invention can be called the 5G core network side (5G Core). Network), and supports non-3GPP access technology through non-3GPP Interworking Function (N3IWF) or next generation packet data gateway (ngPDG) or fixed network access gateway or The non-3GPP access gateway accesses the core network side.
  • N3IWF non-3GPP Interworking Function
  • ngPDG next generation packet data gateway
  • the non-3GPP access gateway accesses the core network side.
  • the system architecture of the embodiment of the present invention supports the UE accessing the 5G core network side through different access technologies.
  • the core network functions are divided into a user plane function element (UPF) and a control plane network element (CPF).
  • the user plane network element functional entity is mainly responsible for packet data packet forwarding, QoS control, or accounting information statistics.
  • the control plane network element function entity is mainly responsible for user registration authentication, mobility management, sending a packet forwarding policy to the user plane (UPF), or a QoS control policy.
  • the CPF can be further subdivided into a Core Access and Mobility Management Function (AMF) and a Session Management Function (SMF).
  • AMF Core Access and Mobility Management Function
  • SMF Session Management Function
  • the AMF is responsible for the registration process when the user accesses and the location management during the user's movement.
  • the SMF is responsible for establishing a corresponding session connection on the core network side when the user initiates the service, and providing specific services for the user.
  • the core network side may further include an independent Policy Control Function (PCF) and a Subscriber/User Data Management (SDM/UDM), and the user subscription data is stored in the SDM/UDM.
  • PCF Policy Control Function
  • SDM/UDM Subscriber/User Data Management
  • the UE may be connected to the AMF through the RAN and/or the N3IWF, and the AMF is respectively connected to the SMF, the SDM/UDM, and the PCF, and the SMF is respectively connected to the AMF, the SDM/UDM, the PCF, and the UPF, and the UPF and the data.
  • the network (Data Network, DN) is connected.
  • the DN may be the Internet or an IMS network.
  • the interfaces and connections in the system architecture include: NG1, NG2, NG3, NG4, and NG11.
  • the NG1 is a control plane connection between the user equipment and the AMF, and is used for transmitting control signaling between the user equipment and the control plane of the core network.
  • the message in the specific NG1 connection may be a connection between the UE and the RAN, and the RAN.
  • the NG2 connection between the AMF and the AMF is transmitted, or may be transmitted by a connection between the UE and the N3IWF, and an NG2 connection between the N3IWF and the AMF.
  • NG2 is a control plane connection between the RAN and the AMF, and a control plane connection between the N3IWF and the AMF is used for transmitting control signaling between the core network control plane and the RAN or N3IWF, and between the UE and the core network control plane.
  • NG3 is a connection between the RAN, the N3IWF, and the user plane function, and is used to support a Protocol Data Unit (PDU) session connection established for the user equipment.
  • NG4 is the connection between the SMF and the user plane function to convey control signaling between the SMF and the user plane functions.
  • NG11 is a connection between AMF and SMF for transmitting control information related to session services.
  • the AMF, SMF, UPF, PCF, UDM, and UE shown in FIG. 12 may perform the steps of the following method embodiments to implement establishing a multi-access PDU session.
  • DETAILED DESCRIPTION OF THE INVENTION Reference can be made to the explanation of the following embodiments.
  • FIG. 13 is a flowchart of a method for processing a connection in another multiple access scenario according to an embodiment of the present invention. This embodiment is used to implement the establishment of a multiple access session. As shown in FIG. 13 , the method in this embodiment may include:
  • Step 601 The user equipment sends a non-access stratum (NAS) message to the access network device.
  • the access network device receives a non-access stratum (NAS) message sent by the user equipment.
  • NAS non-access stratum
  • the non-access stratum (NAS) message includes a multi-access PDU session parameter, where the multi-access PDU session parameter is used to indicate that the user equipment requests to establish a multi-access PDU session, where the non-access stratum (NAS)
  • the message can be a non-access layer transport (NAS Transport) message or a service request message.
  • the user equipment can complete the multi-access registration in the first communication network and the second communication network by using the embodiment shown in FIG. 4 or FIG. 5 above. After the user equipment registers with the second communication network and the second communication network is successful, the user equipment may perform step 601 to request to establish a multi-access PDU session.
  • the user equipment can complete multiple access registration in the first communication network and the second communication network by using the embodiment shown in FIG. 4 or FIG. 5 above.
  • the user equipment initiates a PDU session establishment process in one of the first communication network and the second communication network, as in the existing process.
  • the user equipment initiates the PDU in the other communication network in the first communication network and the second communication network by performing the steps of the present embodiment.
  • the session establishment process that is, adding an access technology of another communication network to the PDU session, thereby establishing a multi-access PDU session.
  • the user equipment determines that the established PDU session is in an active state, the user equipment establishes a multiple access session in another communication network by using the steps in this embodiment.
  • the access network device is an access network device of another communication network in the first communication network and the second communication network.
  • the user equipment sends a non-access layer transport (NAS Transport) message to the access network device, and the non-access layer transport (NAS Transport) message may also be replaced by other NAS messages.
  • NAS Transport non-access layer transport
  • the non-access stratum transmission (NAS Transport) message or other NAS message includes a PDU session establishment request or a PDU session update message, where the PDU session establishment request and the PDU session update message include the second multi-access indication information.
  • session ID PDU session ID
  • the PDU session establishment request and the PDU session update message may be collectively referred to as a Session Management NAS (SM NAS) message.
  • SM NAS Session Management NAS
  • the second multi-access indication information and the session identifier are included in a non-access stratum transmission (NAS Transport) message or other NAS message.
  • NAS Transport non-access stratum transmission
  • the second multiple access indication information is used to indicate that the user equipment requests to establish a multiple access PDU session for the session service corresponding to the session identifier.
  • the specific implementation of the second multiple access indication information may be an additional access indication or a multi-access indication, etc., which is not limited in this application.
  • the session identifier is a session identifier of a PDU session that the user equipment has established over one of the first communication network and the second communication network. In the following embodiment, after the PDU session is successfully established in the first communication network, the user equipment initiates a multiple access session establishment process in the second communication network as an example.
  • the user equipment may determine whether the first communication network and the second communication network belong to the same PLMN.
  • the user equipment performs step 601 to initiate multiple access. PDU session establishment process.
  • the user equipment can determine whether a PDU session has been established in the first communication network or the second communication network. When it is determined that the user equipment has established a PDU session in the first communication network or the second communication network, the user equipment performs step 601 above to initiate a multi-access PDU session establishment procedure.
  • the user equipment may determine whether the first communication network and the second communication network belong to the same PLMN, and determine whether a PDU session has been established in the first communication network or the second communication network.
  • the user equipment performs step 601 above to initiate multiple access. PDU session establishment process.
  • Step 602 The access network device sends a first transmission message to the AMF.
  • the AMF receives the first transmission message sent by the access network device.
  • the first transmission message includes the foregoing NAS Transport message or other NAS message.
  • NAS transport message or other NAS messages For details of the content included in the NAS transport message or other NAS messages, refer to step 601, and details are not described herein.
  • the user equipment sends a non-access layer transport (NAS Transport) message or other NAS message to the AMF through the radio bearer of the access network device.
  • NAS Transport non-access layer transport
  • Step 603 The AMF searches for an SMF identifier corresponding to the PDU session according to the session identifier.
  • Step 604 The AMF sends a second transmission message to the SMF corresponding to the SMF identifier.
  • the SMF receives the second transmission message sent by the AMF.
  • the second transmission message may be an N11 interface transmission message, an Nsmf_PDU Session_Update SMContext message (a PDU session, a Context Update message), or other information, which is not limited in this embodiment of the present invention.
  • the second transmission message includes a user equipment permanent identifier and a PDU session establishment request message.
  • the PDU session establishment request message includes a session identifier (PDU session ID) and the second multiple access indication information, where the second multiple access indication information is used to indicate that the user equipment request is corresponding to the session identifier.
  • the session service establishes a multi-access PDU session.
  • the second transmission message includes a user equipment permanent identifier, a second multiple access indication information, and a session identifier (PDU session ID).
  • PDU session ID a session identifier
  • the AMF sends the second multiple access indication information and the session identifier to the SMF through the second transmission message.
  • the second transmission message may further include access type information.
  • the AMF determines, according to at least one of the second multiple access indication information, the UE subscription information, the UE policy information, or the UE multiple access registration status, whether to allow access to another communication network for the PDU session or It is determined whether the above PDU session is allowed to be accessed in the current access technology. For example, when the UE is in the multi-access registration state or when the UE is in the multi-access registration state in the same PLMN, the AMF allows the access technology of another communication network to be added to the PDU session or allows the PDU session to be currently connected. Into technology access.
  • the AMF allows another communication to be added for the PDU session.
  • the AMF allows the access technology of another communication network to be added to the PDU session or allows the PDU session to be accessed by the current access technology.
  • the "current access technology" involved in the embodiment and the embodiment shown in FIG. 14 specifically refers to an access technology in which a user equipment adds a communication network to a PDU session, thereby establishing a multi-access PDU session.
  • the second multi-access indication information sent by the AMF to the SMF through the second transmission message, or the AMF generates the third
  • the multiple access indication information is sent to the SMF to the third multi-access indication information by using the second transmission message.
  • the third multiple access indication information includes any one of a multiple access registration indication, a multiple access permission indication, a multiple access status indication, and a multiple access session indication; wherein the multiple access registration indication Instructing the user equipment to register multiple accesses in the first communication network and the second communication network, where the multiple access permission indication is used to indicate that the user equipment is allowed to access the first communication network and the In the second communication network, the multiple access status indication is used to indicate that the user equipment accesses the first communication network and the second communication network at the same time.
  • Step 605 The SMF acquires subscription information of the user equipment based on the permanent identifier of the user equipment.
  • the SMF may send the subscription information of the user equipment from the UDM.
  • the SMF sends the sixth multiple access indication information and the session identifier to the UDM.
  • the SMF further sends at least one of access type information or radio access type (RAT type) information to the UDM.
  • the sixth multiple access indication information is used to indicate that the PDU session is a multiple access session.
  • the above Access type information or RAT type information is used to indicate an access technology of the second communication network.
  • the UDM sends the subscription information corresponding to the access technology of the second communication network to the SMF, such as the charging policy subscription data of the access technology of the user equipment in the second communication network to the SMF.
  • Step 606 The SMF searches for a session connection corresponding to the PDU session between the SMF and the PCF based on the session identifier, and the SMF sends a third transmission message to the PCF on the session connection.
  • the third transmission message includes a seventh multiple access indication information, a session identifier, and access type information of the second communication network, where the seventh multiple access indication information indicates that the PDU session is multiple access PDU session.
  • the third transmission message includes a session identifier, access type information of the first communication network, and access type information of the second communication network.
  • Step 607 The PCF stores a binding relationship between the session identifier and the access type information of the first communication network and the access type information of the second communication network.
  • Step 608 The PCF sends the policy information of the PDU session to the SMF.
  • the SMF receives the policy information of the PDU session sent by the PCF.
  • the policy information of the PDU session may include the offload policy information.
  • the offloading policy information may include data flow description information and a corresponding policy.
  • the traffiction policy information may include data flow description information and access type information corresponding to the data flow description information.
  • Step 609 The SMF determines, according to at least one of the session service subscription data or the policy information or the second multiple access indication information or the third multiple access indication information in the subscription information, whether the session service corresponding to the session identifier is allowed to be established.
  • the multiple access PDU session or the current access technology is allowed. If yes, step 610 is performed, and if no, step 611 is performed.
  • the SMF is based on the session service subscription data or the policy information in the subscription information.
  • the DN network Data Network
  • the access technology of the second communication network is allowed to be added for the above PDU session.
  • the SMF according to the second multiple access indication information or the third multiple access indication information, is configured to add an access technology of the second communication network to the PDU session.
  • Step 610 The SMF sends an N4 session creation or update request message to the UPF.
  • the UPF receives the N4 session new or update request message sent by the SMF.
  • the fourth multiple access indication information or the access type information is included in the N4 session new or update request message.
  • the SMF searches for the N4 session connection corresponding to the PDU session based on the session identifier, and sends an N4 Session Establishment/Modification Request message on the N4 session connection.
  • the fourth multiple access indication information may be in the same parameter form as the second multiple access indication information, such as an additional access indication, or a different parameter form.
  • the access type information indicates the access technology of the second communication network, such as 3GPP access, non3GPP access, trusted WLAN access, untrusted WLAN access technology, 5G RAN access, and fixed network connection. Into technology, LTE access technology, etc.
  • the SMF selects the N3 interface UPF or ULCL UPF (Uplink Classifier UPF) or the Branching point UPF or the Anchor UPF to send the PDU session new or update request message, and includes the fourth multiple access indication.
  • Information or access type information adding access network tunnel information of the second communication network to the selected UPF.
  • the PDU session new or update request message or the fourth multiple access indication information or the access type information is used to indicate that the UPF creates a tunnel identifier corresponding to the access network side of the second communication network for the session service, such as F-TEID (IP address-Tunnel Endpoint Identifier). That is, the UPF simultaneously stores the access network side tunnel identifier of the first communication network and the access network side tunnel identifier of the second communication network for the PDU session.
  • F-TEID IP address-Tunnel Endpoint Identifier
  • the SMF may also send a correspondence between the access type information and the access network side tunnel identifier to the UPF.
  • the UPF stores the binding relationship between the access type information and the access side tunnel identifier.
  • the SMF sends a packet forward rule to the UPF, and the forwarding rule of the data packet includes a correspondence between the data flow description information (such as at least one of the packet quintuple information) and the access type information.
  • the UPF matches the data packet based on the data flow description information, searches for the corresponding access side tunnel identifier based on the access type information, and sends the matched data packet to the corresponding access network side tunnel.
  • the UPF allocates, according to the PDU session new or update request message or the fourth multiple access indication information and/or the access type information, the UPF side tunnel identifier corresponding to the access network side of the second communication network, and The tunnel identifier notifies the access network device of the second communication network, thereby establishing a tunnel between the access network device of the second communication network and the UPF, and implementing multi-access session establishment.
  • the UPF stores the access network side tunnel identifier of the first communication network and the access network of the second communication network for the PDU session based on the PDU session new or update request message or the fourth multiple access indication information or the access type information. Side tunnel identification.
  • the UPF receives the fourth multiple access indication information sent by the SMF.
  • the UPF stores the access network side tunnel identifier of the second communication network for the session service according to the fourth multiple access indication information, and the UPF reserves the first communication that is stored when the session service is accessed by the first communication network.
  • the access network side tunnel identifier of the network may also receive the correspondence between the access type information sent by the SMF and the access network side tunnel identifier of the first communication network or the access network side tunnel identifier of the second communication network, and the UPF storage access type information and Corresponding relationship between the access network side tunnel identifier of the first communication network or the access network side tunnel identifier of the second communication network.
  • the UPF may further receive a forwarding rule of the data packet sent by the SMF, where the forwarding rule of the data packet includes a correspondence between the data flow description information and the access type information, and the UPF stores the data flow. Corresponding relationship between the information and the access type information; the UPF receiving the data packet, determining, according to the correspondence between the data flow description information and the access type information, the access type information corresponding to the data packet; Corresponding relationship between the access type information corresponding to the data packet, the access type information, the access network side tunnel identifier of the first communication network, or the access network side tunnel identifier of the second communication network, The data packet is sent to the access network side tunnel corresponding to the access type information corresponding to the data packet.
  • the UPF receives the access type information sent by the SMF, and the UPF stores, according to the access type information, the access network side tunnel identifier of the second communication network. Specifically, the UPF determines whether the access network side tunnel identifier corresponding to the access type information is already stored. If not, the UPF stores the access network side tunnel identifier. Otherwise, the UPF searches for the access side tunnel identifier stored before based on the access type, and replaces the original access network side tunnel identifier with the access network side tunnel identifier.
  • the UPF stores the access network side tunnel identifier of the first communication network and its corresponding access type information, the access network side tunnel identifier of the second communication network, and its corresponding access type for the PDU session based on the access type information.
  • the information that is, the correspondence between the tunnel identifier and the access type information is stored.
  • the UPF may further receive a forwarding rule of the data packet sent by the SMF, where the forwarding rule of the data packet includes a correspondence between the data flow description information and the access type information, and the UPF stores the data flow. Corresponding relationship between the information and the access type information; the UPF receiving the data packet, determining, according to the correspondence between the data flow description information and the access type information, the access type information corresponding to the data packet; The access type information of the data packet, the access network side tunnel identifier of the first communication network and the corresponding access type information of the first communication network, the access network side tunnel identifier of the second communication network, and the corresponding The access type information is sent to the access network side tunnel corresponding to the access type information corresponding to the data packet.
  • Step 611 If the multi-access session is not allowed to be established, the SMF sends an N4 session update or a new request message to the UPF, where the N4 session update or the new request message is used to indicate that the UPF updates the access network side of the session service. Tunnel identification. The UPF receives an N4 session update or a new request message sent by the SMF.
  • the access network side tunnel identifier that updates the session service includes storing a tunnel identifier corresponding to an access network side of the second communication network, and deleting or updating a tunnel corresponding to the access network side of the first communication network.
  • Steps 611 and 610 are respectively applicable to different scenarios, and are not triggered at the same time.
  • Step 612 The UPF sends a connection setup reply message to the SMF.
  • the SMF receives the connection setup reply message sent by the UPF.
  • Step 613 The SMF sends an information transmission message or a Namf_Communication_N1N2MessageTransfer message or an Nsmf_PDUSession_UpdateSMContext Response to the AMF.
  • the SMF sends the message, where the message may include access type information and fifth multi-access indication information.
  • the implementation manner of the fifth multiple access indication information may be an additional access indication, or a different parameter form, like the second multiple access indication information.
  • the fifth multiple access indication information indicates that the AMF adds another access technology to the PDU, and the access technology is indicated by the access type.
  • the above message contains an additional access parameter indicating another access technology added.
  • the additional access parameter values are 3GPP Access, non3GPP access, 5G RAN, fixed network access, or WLAN access.
  • Step 614 The AMF marks the PDU session as a multiple access PDU session.
  • the AMF stores a binding relationship between the session identifier and the access type information of the first communication network and the access type information of the second communication network.
  • multi-access session establishment on the basis of implementing multi-access registration of the user equipment in the first communication network and the second communication network, multi-access session establishment can be further implemented.
  • FIG. 14 is a flowchart of a connection processing method in another multiple access scenario according to an embodiment of the present invention.
  • the multiple access PDU session parameter in the embodiment shown in FIG. 13 is a service request message, and the service request message is used.
  • the method of the multi-access PDU session identifier is specifically explained. As shown in FIG. 14, the method in this embodiment may include:
  • Step 701 The user equipment sends a service request message (Service Request) to the access network device.
  • the access network device receives the service request message sent by the user equipment.
  • the user equipment can complete the multi-access registration in the first communication network and the second communication network by using the embodiment shown in FIG. 4 or FIG. 5 above.
  • the user equipment After the user equipment is successfully registered with the first communication network and the second communication network, the user equipment initiates a PDU session establishment process in one of the first communication network and the second communication network, which is the same as the existing process.
  • the PDU session is established after one of the first communication network and the second communication network is established, and the user equipment determines that the first communication network and the second communication network belong to the same PLMN, the user equipment is in the first communication network and the second Another communication network in the communication network establishes a multiple access session by the steps of this embodiment.
  • the user equipment when the user equipment determines that the established PDU session is in an inactive state, the user equipment establishes a multiple access session in another communication network by using the steps in this embodiment. Specifically, the user equipment sends a Service Request message (Service Request) to the AMF on another communication network.
  • the service request message includes a multi-access PDU session identifier list, where the list includes at least one session identifier of the established PDU session.
  • the list is used to indicate that the UE requests to add another access technology to the PDU session in the list, ie, the PDU session becomes a multiple access PDU session.
  • Step 702 The access network device sends a first transmission message to the AMF.
  • the AMF receives the first transmission message sent by the access network device.
  • the first transmission message includes a service request message.
  • Step 703 The AMF obtains a multi-access PDU session identifier list, and the AMF determines whether the PDU session in the list can support multiple access or determine whether the PDU session is allowed to access in the current access technology.
  • the AMF determines, according to at least one of the UE subscription information, or the UE policy information, or the UE multiple access registration status, whether to allow another access technology to be added to the PDU connection, or whether the PDU session is allowed in the current access technology. Access. For example, when the UE is in the multi-access registration state, or when the UE is in the multi-access registration state in the same PLMN, the AMF allows another access technology to be added to the PDU session, or allows the PDU session to be accessed in the current access technology. .
  • the AMF allows another access technology to be added to the PDU session or Allow PDU sessions to be accessed at the current access technology.
  • the AMF receives the multi-access PDU session identification list, the AMF allows another access technology to be added to the PDU session in the list, or allows the PDU session to be accessed at the current access technology.
  • the AMF searches for the SMF identifier corresponding to the PDU session based on the session identifier, and sends a second transmission message to the SMF.
  • the AMF searches for the SMF identifier corresponding to the at least one PDU session based on the session identifier in the multiple access PDU session identifier list.
  • the AMF may send second transmission messages to different SMFs, each of the second transmission messages includes a session identifier and a third multi-access indication information, where the session identifier is processed on the SMF.
  • the session identifier of the PDU session that is, the PDU session identifier contained in the multi-access PDU session identifier list.
  • Each SMF establishes a multiple access PDU session for the PDU session based on the session identity and the third multiple access indication information.
  • multi-access session establishment can be further implemented.
  • a multi-access PDU session can be established on the other side communication network based on the above procedure.
  • the embodiment of the invention further provides a user equipment, which adopts the same structure as the AMF shown in FIG.
  • the processor of the user equipment is configured to execute the steps of the user equipment of the foregoing method embodiment of FIG. 13 or FIG. 14 by calling a program or instruction stored in the memory, thereby implementing the user equipment in the first communication network and the second
  • the establishment of the multiple access session can be further implemented.
  • the specific implementation process refer to the foregoing method embodiments.
  • the embodiment of the present invention further provides an UPF, which adopts the same structure as the AMF shown in FIG.
  • the processor of the UPF is configured to execute the steps of the UPF of the foregoing method embodiment of FIG. 13 or FIG. 14 by calling a program or instruction stored in the memory, thereby implementing the user equipment in the first communication network and the second communication network.
  • the multi-access session can be further established.
  • the specific implementation process refer to the foregoing method embodiments.
  • the embodiment of the present invention further provides an SMF, which adopts the same structure as the AMF shown in FIG.
  • the processor of the SMF is configured to execute the steps of the SMF of the foregoing method embodiment of FIG. 13 or FIG. 14 by calling a program or instruction stored in the memory, thereby implementing the user equipment in the first communication network and the second communication network.
  • the multi-access session can be further established.
  • the specific implementation process refer to the foregoing method embodiments.
  • FIG. 15 is a schematic structural diagram of another user equipment according to an embodiment of the present invention.
  • the apparatus in this embodiment may include: a registration module 41, a processing module 42, and a sending module 43.
  • the registration is initiated on the first communication network and the second communication network.
  • the processing module 42 is configured to send a non-access stratum message to the core network device by using the sending module 43 after the registration is successful, where the non-access stratum message includes multiple Accessing PDU session parameters, wherein the multiple access PDU session parameter is used to indicate that the user equipment requests to establish a multiple access PDU session.
  • the multiple access PDU session parameter includes a second multiple access indication information and a session identifier, where the second multiple access indication information is used to indicate that the user equipment request is corresponding to the session identifier.
  • the session establishes a multiple access PDU session; or the multiple access PDU session parameter includes a multiple access PDU session identifier list, the multiple access PDU session identifier list includes at least one session identifier, and the multiple access PDU session identifier The list is used to indicate that the user equipment requests to establish a multiple access PDU session for the session corresponding to the at least one session identifier.
  • the processing module 42 is further configured to: before sending the non-access stratum message to the core network function entity, determining whether the first communications network and the second communications network belong to the same PLMN; and/or, It is judged that a PDU session has been established in the first communication network or the second communication network.
  • the device in this embodiment may be used to implement the technical solution of the foregoing method embodiment, and the implementation principle and the technical effect are similar, and details are not described herein again.
  • FIG. 16 is a schematic structural diagram of another user plane function entity according to an embodiment of the present invention.
  • the apparatus in this embodiment may include: a receiving module 51 and a processing module 52, where the receiving module 51 is configured to receive The fourth multi-access indication information sent by the session management function entity SMF; the processing module 52, configured to store the access network side tunnel identifier and the second communication of the first communication network for the PDU session based on the fourth multiple access indication information The access network side tunnel identifier of the network.
  • the receiving module 51 is further configured to: receive the access type information sent by the SMF, and the access network side tunnel identifier of the first communications network or the access network side tunnel of the second communications network.
  • the processing module 52 is further configured to store a correspondence between the access type information and the access network side tunnel identifier, where the access network side tunnel identifier includes the access network side tunnel of the first communication network. Identifying or accessing the network side tunnel identity of the second communication network.
  • the receiving module 51 is further configured to: receive a forwarding rule of the data packet sent by the SMF, where the forwarding rule of the data packet includes a correspondence between the data flow description information and the access type information, where the processing module The storage data flow description information and the access type information are corresponding to each other; the receiving module 51 is further configured to receive the data packet, and the processing module 52 is further configured to: according to the corresponding relationship between the data flow description information and the access type information Determining the access type information corresponding to the data packet; sending the data packet to the office according to the access type information corresponding to the data packet and the correspondence between the access type information and the access network side tunnel identifier The access network side tunnel corresponding to the access type information.
  • the device in this embodiment may be used to implement the technical solution of the foregoing method embodiment, and the implementation principle and the technical effect are similar, and details are not described herein again.
  • the embodiment of the present application further provides another user plane function entity, which may be the same as that of FIG. 20, wherein the receiving module is configured to receive access type information sent by the session management function entity SMF, and a processing module, configured to The access type information is a PDU session storage access network side tunnel identifier and the access type information correspondence, the access network side tunnel identifier includes an access network side tunnel identifier of the first communication network, or the The access network side tunnel identifier of the second communication network.
  • the receiving module is further configured to: receive a forwarding rule of the data packet sent by the SMF, where the forwarding rule of the data packet includes a correspondence between the data flow description information and the access type information, where the processing module further Corresponding relationship between the data flow description information and the access type information; the receiving module is further configured to receive the data packet, where the processing module is further configured to determine, according to the correspondence between the data flow description information and the access type information The access type information corresponding to the data packet; according to the access type information corresponding to the data packet, the correspondence between the access network side tunnel identifier and the access type information stored by the UPF, The data packet is sent to the access network side tunnel corresponding to the access type information.
  • the device in this embodiment may be used to implement the technical solution of the foregoing method embodiment, and the implementation principle and the technical effect are similar, and details are not described herein again.
  • FIG. 17 is a schematic structural diagram of another session management function entity according to an embodiment of the present invention.
  • the apparatus in this embodiment may include: a receiving module 61 and a processing module 62, where the receiving module 61 is configured to receive a second transmission message sent by the mobility management function entity, the second transmission message includes a multiple access PDU session parameter, and the multiple access PDU session parameter includes a PDU session establishment request message, where the PDU session establishment request message is included a second multiple access indication information and a session identifier, or the multiple access PDU session parameter includes a third multiple access indication information and the session identifier; and the processing module 62 is configured to use the multiple access PDU session parameter Establishing a multiple access PDU session for the user equipment, where the second multiple access indication information is used to indicate that the user equipment requests to establish a multiple access PDU session for the session service corresponding to the session identifier, where the The three-multiple access indication information is used to indicate that a multi-access PDU session is allowed to be established for the session
  • the processing module 62 is further configured to acquire subscription information of the user equipment; At least one of the subscription information or policy information or the second multiple access indication information or the third multiple access indication information allows a multi-access PDU session to be established for the session service corresponding to the session identifier.
  • the session management function entity further includes a sending module 63, where the sending module 63 is configured to send a session new or update message to the user plane function entity UPF, where the session new or update message is used to indicate that the UPF is The session service is newly created with a tunnel identifier corresponding to the access network side of the second communication network.
  • the sending module is further configured to: send a session to the UPF to create or An update message, the session update or new message is used to indicate that the UPF updates the access network side tunnel identifier of the session service, and the access network side tunnel identifier that updates the session service includes storing and a second communication network.
  • the access network side corresponds to the tunnel identifier, and deletes or updates the tunnel identifier corresponding to the access network side of the first communication network.
  • the processing module is further configured to: search, according to the session identifier, a UPF corresponding to the PDU session; and the sending module is further configured to: select, by using the processing module, an N3 interface UPF or an uplink classification UPF in the UPF or The branch point UPF or anchor point UPF sends the session new or update message.
  • the sending module is further configured to: send fourth multiple access indication information and/or access type information to the UPF, where the fourth multiple access indication information and/or access type information is used to indicate storage.
  • the sending module is further configured to: send, by the session management function entity, a correspondence between the access type information and the tunnel identifier to the UPF; or, the session management function entity sends a forwarding rule of the data packet to the UPF Or the session management function entity sends a correspondence between the access type information and the tunnel identifier, and a forwarding rule of the data packet to the UPF; wherein the forwarding rule of the data packet includes data flow description information and access The correspondence of type information.
  • the sending module is further configured to: send the fifth multiple access indication information and the session identifier to the mobility management function entity, where the fifth multiple access indication information is used to indicate that the session identifier corresponds to The session service is a multiple access PDU session.
  • the sending module is further configured to: send, to the PCF, the seventh multiple access indication information, the session identifier, and the access type information, where the seventh multiple access indication information is used to indicate the PDU corresponding to the session identifier.
  • the session is a multiple access PDU session; or, the fourth transmission message is sent to the PCF, where the fourth transmission message includes a session identifier, access type information of the first communication network, and access type information of the second communication network, The fourth transmission message is used to instruct the PCF to store a binding relationship between the session identifier and access type information of the first communication network and access type information of the second communication network.
  • the device in this embodiment may be used to implement the technical solution of the foregoing method embodiment, and the implementation principle and the technical effect are similar, and details are not described herein again.
  • the embodiment of the present invention further provides a computer readable storage medium, where the computer readable storage medium is used for storing the mobility.
  • the computer software instructions used by the management function entity when run on a computer, cause the computer to perform the connection processing methods in various possible multiple access scenarios in the above method embodiments.
  • the processes or functions described in accordance with embodiments of the present invention may be generated in whole or in part.
  • the computer instructions can be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium, such as cellular communication, infrared, short-range wireless, microwave Etc.) Transfer to another website site, computer, server, or data center.
  • the computer readable storage medium can be any available media that can be accessed by a computer or a data storage device such as a server, data center, or the like that includes one or more available media.
  • the usable medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium (such as a solid state disk (SSD)).
  • the embodiment of the present invention further provides a computer readable storage medium, where the computer readable storage medium is used for storing the session management.
  • the computer software instructions used by the functional entity when run on a computer, cause the computer to perform the connection processing methods in various possible multiple access scenarios in the above method embodiments.
  • the processes or functions described in accordance with embodiments of the present invention may be generated in whole or in part.
  • the computer instructions can be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium, such as cellular communication, infrared, short-range wireless, microwave Etc.) Transfer to another website site, computer, server, or data center.
  • the computer readable storage medium can be any available media that can be accessed by a computer or a data storage device such as a server, data center, or the like that includes one or more available media.
  • the usable medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium (eg, an SSD) or the like.
  • an embodiment of the present invention further provides a computer program product, that is, a software product, which, when run on a computer, causes the computer to perform a connection processing method in various possible multiple access scenarios in the foregoing method embodiments. .
  • a computer program product that is, a software product, which, when run on a computer, causes the computer to perform a connection processing method in various possible multiple access scenarios in the foregoing method embodiments. .
  • the implementation principle and technical effect are similar, and will not be described here.

Abstract

本发明实施例提供一种多接入场景中的连接处理方法和装置。所述多接入场景中的连接处理方法，包括：移动性管理功能实体接收接入网设备发送的第一传输消息，所述第一传输消息包括注册请求消息，所述注册请求消息包括第一多接入指示信息和标识信息；所述移动性管理功能实体根据所述第一多接入指示信息和所述标识信息确定所述用户设备在第一通信网络已注册且发起了在第二通信网络的注册；所述移动性管理功能实体执行所述用户设备在所述第二通信网络的注册流程。本发明实施例可以有效提升数据库集群的处理性能。本发明实施例可以实现用户设备在第一通信网络和第二通信网络的多接入注册。

Description

多接入场景中的连接处理方法和装置
本申请要求了2017年3月8日提交的、申请号为201710133194.6、发明名称为“多接入场景中的连接处理方法和装置”的中国申请的优先权，以及2018年1月15日提交的、申请号为201810037231.8、发明名称为“多接入场景中的连接处理方法和装置”的中国申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明实施例涉及通信技术，尤其涉及一种多接入场景中的连接处理方法和装置。
背景技术
为了应对无线宽带技术的挑战，保持3GPP网络的领先优势，3GPP标准组在2016年底制定了下一代移动通信网络架构(Next Generation System)，称为5G网络架构。该架构不但支持3GPP标准组定义的无线技术(如LTE、5G RAN等)接入核心网络侧(5G Core network)，而且支持非3GPP(non-3GPP)接入技术通过non-3GPP转换功能(non-3GPP Interworking Function，N3IWF)或下一代接入网关(next Generation packet data Gateway，ngPDG)接入核心网络侧。
当前的3GPP通信协议中尚未规定用户设备(User Equipment，UE)如何同时注册至3GPP网络与non-3GPP网络，即无法满足UE在3GPP网络与non-3GPP网络双注册的需求。
发明内容
本发明实施例提供一种多接入场景中的连接处理方法和装置，以满足UE在第一通信网络与第二通信网络多注册的需求。
第一方面，本发明实施例提供一种多接入场景中的连接处理方法，包括：
移动性管理功能实体接收接入网设备发送的第一传输消息，该第一传输消息包括注册请求消息，该注册请求消息可以包括第一多接入指示信息和标识信息，该标识信息用于获取用户设备的上下文信息和选择网络功能实体中的至少一个；
该移动性管理功能实体根据所述第一多接入指示信息和所述标识信息确定所述用户设备在第一通信网络已注册且发起了在第二通信网络的注册；
该移动性管理功能实体执行所述用户设备在所述第二通信网络的注册流程。
通过第一方面提供的多接入场景中的连接处理方法，可以实现用户设备在第一通信网络和第二通信网络的多接入注册，以满足用户设备在第一通信网络与第二通信网络多注册的需求。
结合第一方面，在第一方面的一种可能的实施方式中，移动性管理功能实体根据第一多接入指示信息和标识信息确定用户设备在第一通信网络已注册且发起了在第二通信网络的注册，具体可以包括：
该移动性管理功能实体根据该标识信息获取该用户设备的上下文信息；
该移动性管理功能实体根据该用户设备的上下文信息确定该用户设备在第一通信网络已注册；
该移动性管理功能实体根据该第一多接入指示信息确定该用户设备发起了在所述第二通信网络的注册。
结合第一方面以及上述第一方面的一种可能的实施方式，在第一方面的另一种可能的实施方式中，该第一传输消息还包括接入类型指示信息，该移动性管理功能实体根据该第一多接入指示信息和该标识信息确定该用户设备在第一通信网络已注册且发起了在第二通信网络的注册，包括：
该移动性管理功能实体根据该接入类型指示信息、该第一多接入指示信息和该标识信息确定该用户设备在第一通信网络已注册且发起了在第二通信网络的注册。
第二方面，本发明实施例提供一种多接入场景中的连接处理方法，包括：
移动性管理功能实体接收接入网设备发送的第一传输消息，所述第一传输消息包括接入类型指示信息和注册请求消息，所述注册请求消息包括标识信息，所述标识信息用于获取用户设备的上下文信息和选择网络功能实体中的至少一个；
该移动性管理功能实体根据该接入类型指示信息和该标识信息确定该用户设备在第一通信网络已注册且发起了在第二通信网络的注册；该移动性管理功能实体执行该用户设备在所述第二通信网络的注册流程。
通过第二方面提供的多接入场景中的连接处理方法，可以实现用户设备在第一通信网络和第二通信网络的多接入注册，以满足用户设备在第一通信网络与第二通信网络多注册的需求。
结合第二方面，在第二方面的一种可能的实施方式中，所述移动性管理功能实体根据所述接入类型指示信息和所述标识信息确定所述用户设备在第一通信网络已注册且发起了在第二通信网络的注册，包括：
所述移动性管理功能实体根据所述标识信息获取所述用户设备的上下文信息；
所述移动性管理功能实体根据所述用户设备的上下文信息确定所述用户设备在第一通信网络已注册；
所述移动性管理功能实体根据所述接入类型指示信息确定所述用户设备发起了在第二通信网络的注册。
结合第一方面以及上述第一方面的一种可能的实施方式、或者结合第二方面以及上述第二方面的一种可能的实施方式，在第一方面或第二方面的另一种可能的实施方式中，该移动性管理功能实体执行该用户设备在该第二通信网络的注册流程之前，所述方法还包括：
该移动性管理功能实体根据该用户设备的签约信息确定允许该用户设备在该第一通信网络和该第二通信网络注册。
结合第一方面以及上述第一方面的一种可能的实施方式、或者结合第二方面以及上述第二方面的一种可能的实施方式，在第一方面或第二方面的另一种可能的实施方式中，所述方法还包括：
若该移动性管理功能实体根据该用户设备的签约信息或本地配置信息确定不允许该用户设备在所述第一通信网络和所述第二通信网络注册，则该移动性管理功能实体执行该 用户设备在该第二通信网络的注册流程，并发起该用户设备在该第一通信网络的去注册流程或删除该用户设备在所述第一通信网络的注册状态。
结合第一方面以及上述第一方面的一种可能的实施方式、或者结合第二方面以及上述第二方面的一种可能的实施方式，在第一方面或第二方面的另一种可能的实施方式中，该注册请求消息还包括第二多接入指示信息，所述方法还包括：
该移动性管理功能实体向会话管理功能实体发送第二传输消息，所述第二传输消息包括用户设备的永久标识和PDU会话建立请求信息，该PDU会话建立请求信息包括该会话标识和该第二多接入指示信息，该第二多接入指示信息用于指示该用户设备请求为该会话标识对应的会话业务建立多接入PDU会话。
通过本实施方式提供的多接入场景中的连接处理方法，可以实现多接入PDU会话的建立。
结合第一方面以及上述第一方面的一种可能的实施方式、或者结合第二方面以及上述第二方面的一种可能的实施方式，在第一方面或第二方面的另一种可能的实施方式中，该第二传输消息还包括第三多接入指示信息，该第三多接入指示信息包括多接入注册指示、多接入允许指示、和多接入状态指示中的任意一个；
其中，该多接入注册指示用于指示该用户设备在该第一通信网络和第二通信网络多接入注册，该多接入允许指示用于指示允许所述用户设备同时接入所述第一通信网络与所述第二通信网络，所述多接入状态指示用于指示所述用户设备同时接入所述第一通信网络与所述第二通信网络的状态。
结合第一方面以及上述第一方面的一种可能的实施方式、或者结合第二方面以及上述第二方面的一种可能的实施方式，在第一方面或第二方面的另一种可能的实施方式中，所述移动性管理功能实体为所述接入网设备根据所述标识信息选取的。
第三方面，本发明实施例提供一种多接入场景中的连接处理方法，包括：
会话管理功能实体接收移动性管理功能实体发送的第二传输消息，所述第二传输消息包括用户设备的永久标识和PDU会话建立请求信息，所述PDU会话建立请求信息包括所述会话标识和所述第二多接入指示信息，所述第二多接入指示信息用于指示所述用户设备请求为所述会话标识对应的会话业务建立多接入PDU会话；
所述会话管理功能实体根据所述PDU会话建立请求信息为所述会话标识对应的会话业务建立多接入会话。
通过第三方面提供的多接入场景中的连接处理方法，可以实现多接入PDU会话的建立。
通过第三方面提供的多接入场景中的连接处理方法，可以多接入会话的建立。
结合第三方面，在第三方面的一种可能的实现方式中，所述会话管理功能实体根据所述PDU会话建立请求信息为所述会话标识对应的会话业务建立多接入会话之前，所述方法还包括：
所述会话管理功能实体基于所述用户设备的永久标识获取所述用户设备的签约信息；
所述会话管理功能实体根据所述签约信息中的会话业务签约数据确定所述会话标识对应的会话业务允许建立多接入PDU会话。
结合第三方面以及上述第三方面的一种可能的实施方式，在第三方面的另一种可能的 实施方式中，所述第二传输消息还包括第三多接入指示；
所述会话管理功能实体根据所述第三多接入指示信息确定允许所述会话标识对应的会话业务建立多接入PDU会话。
结合第三方面以及上述第三方面的一种可能的实施方式，在第三方面的另一种可能的实施方式中，所述方法还包括：
所述会话管理功能实体向用户面功能实体UPF发起PDU会话新建或更新流程，所述PDU会话新建或更新流程包括所述会话管理功能实体发送PDU会话新建或更新请求消息，所述PDU会话新建或更新请求消息用于指示所述UPF为所述会话业务新建与第二通信网络的接入网侧对应的隧道标识。
结合第三方面以及上述第三方面的一种可能的实施方式，在第三方面的另一种可能的实施方式中，若所述会话管理功能实体根据所述签约信息中的会话业务签约数据确定所述会话标识对应的会话业务不允许建立多接入PDU会话，所述方法还包括：
所述会话管理功能实体向UPF发起PDU会话更新或新建流程，所述PDU会话更新流程包括所述会话管理功能实体发送PDU会话更新或新建请求消息，所述PDU会话更新或新建请求消息用于指示所述UPF更新所述会话业务的接入网侧隧道标识，所述更新所述会话业务的接入网侧隧道标识包括存储与第二通信网络的接入网侧对应隧道标识，并删除或更新与第一通信网络的接入网络侧对应的隧道标识。
结合第三方面以及上述第三方面的一种可能的实施方式，在第三方面的另一种可能的实施方式中，所述方法还包括：所述会话管理功能实体向用户面功能实体UPF发送接入类型信息与接入网侧隧道标识的对应关系；或者，所述会话管理功能实体向所述UPF发送接入类型信息与接入网侧隧道标识的对应关系、以及数据包的转发规则；其中，所述数据包的转发规则包括数据流描述信息和接入类型信息的对应关系。
结合第三方面以及上述第三方面的一种可能的实施方式，在第三方面的另一种可能的实施方式中，所述方法还包括：所述会话管理功能实体向所述移动性管理功能实体发送第五多接入指示信息和所述会话标识，所述第五多接入指示信息用于指示所述会话标识对应的会话为多接入PDU会话。
结合第三方面以及上述第三方面的一种可能的实施方式，在第三方面的另一种可能的实施方式中，所述方法还包括：所述会话管理功能实体向策略控制功能实体PCF发送第七多接入指示信息、所述会话标识和接入类型信息，所述第七多接入指示信息用于指示所述会话标识对应的PDU会话为多接入PDU会话；或者，所述会话管理功能实体向所述PCF发送第四传输消息，所述第四传输消息包括所述会话标识、第一通信网络的接入类型信息与第二通信网络的接入类型信息，所述第一通信网络的接入类型信息与第二通信网络的接入类型信息用于指示所述PCF存储所述会话标识与第一通信网络的接入类型信息及第二通信网络的接入类型信息的绑定关系。
第四方面，本发明实施例提供一种多接入场景中的连接处理方法，包括：
用户设备在第一通信网络注册成功且需要在第二通信网络注册时，所述用户设备向所述第二通信网络的接入网设备发送注册请求消息或参数，所述注册请求消息或参数中包括第一多接入指示信息和标识信息；
其中，所述第一多接入指示信息用于网络侧接入与移动性管理功能实体移动性管理功能实体根据所述第一多接入指示信息和所述标识信息执行所述用户设备在所述第二通信网络的注册，所述标识信息用于选择网络功能实体和获取用户设备的上下文信息中的至少一个。
结合第四方面，在第四方面的一种可能的实现方式中，所述注册请求消息或参数中还包括第二多接入指示信息，所述第二多接入指示信息用于所述用户设备在所述第二通信网络注册成功后，会话管理功能实体根据所述第二接入指示信息建立多接入会话。
结合上述任一方面或者任一方面的任一种可能的实现方式，所述标识信息具体可以包括所述用户设备的临时标识和网络切片选择辅助信息中至少一项。
结合上述任一方面或者任一方面的任一种可能的实现方式，第一多接入指示信息包括多接入能力指示信息和位置区域注册指示信息中的至少一项。
第五方面，本发明实施例提供一种移动性管理功能实体，该移动性管理功能实体具有实现上述方法实施例中移动性管理功能实体行为的功能。该功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。该硬件或软件包括一个或多个与上述功能相对应的模块。
第六方面，本发明实施例提供一种移动性管理功能实体，包括：处理器、存储器、总线和通信接口；该存储器用于存储计算机执行指令，该处理器与该存储器通过该总线连接，当该移动性管理功能实体运行时，该处理器执行该存储器存储的该计算机执行指令，以使该移动性管理功能实体执行如上述第一方面任意一项或者第二方面任意一项的多接入场景中的连接处理方法。
第七方面，本发明实施例提供了一种计算机可读存储介质，用于储存为上述移动性管理功能实体所用的计算机软件指令，当其在计算机上运行时，使得计算机可以执行上述第一方面中任意一项或者第二方面任意一项的多接入场景中的连接处理方法。
第八方面，本发明实施例提供了一种包含指令的计算机程序产品，当其在计算机上运行时，使得计算机可以执行上述第一方面中任意一项或者第二方面任意一项的多接入场景中的连接处理方法。
另外，第五方面至第八方面中任一种设计方式所带来的技术效果可参见第一方面中不同设计方式所带来的技术效果，此处不再赘述。
第九方面，本发明实施例提供一种会话管理功能实体，该会话管理功能实体具有实现上述方法实施例中会话管理功能实体行为的功能。该功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。该硬件或软件包括一个或多个与上述功能相对应的模块。
第十方面，本发明实施例提供一种会话管理功能实体，包括：处理器、存储器、总线和通信接口；该存储器用于存储计算机执行指令，该处理器与该存储器通过该总线连接，当该会话管理功能实体运行时，该处理器执行该存储器存储的该计算机执行指令，以使该会话管理功能实体执行如上述第三方面任意一项的多接入场景中的连接处理方法。
第十一方面，本发明实施例提供了一种计算机可读存储介质，用于储存为上述会话管理功能实体所用的计算机软件指令，当其在计算机上运行时，使得计算机可以执行上述第三方面中任意一项的多接入场景中的连接处理方法。
第十二方面，本发明实施例提供了一种包含指令的计算机程序产品，当其在计算机上 运行时，使得计算机可以执行上述第三方面中任意一项的多接入场景中的连接处理方法。
另外，第九方面至第十二方面中任一种设计方式所带来的技术效果可参见第三方面中不同设计方式所带来的技术效果，此处不再赘述。
第十三方面，本发明实施例提供一种用户设备，该用户设备具有实现上述方法实施例中会话管理功能实体行为的功能。该功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。该硬件或软件包括一个或多个与上述功能相对应的模块。
第十四方面，本发明实施例提供一种用户设备，包括：处理器、存储器、总线和通信接口；该存储器用于存储计算机执行指令，该处理器与该存储器通过该总线连接，当该用户设备运行时，该处理器执行该存储器存储的该计算机执行指令，以使该用户设备执行如上述第四方面任意一项的多接入场景中的连接处理方法。
另外，第十三方面至第十四方面中任一种设计方式所带来的技术效果可参见第四方面中不同设计方式所带来的技术效果，此处不再赘述。
第十五方面，本发明实施例提供一种通信系统，包括如第六方面所述的移动性管理功能实体、以及如第十方面所述的会话管理功能实体。
第十六方面，本发明实施例提供一种多接入场景中的连接处理方法，包括：
会话管理功能实体接收移动性管理功能实体发送的第二传输消息，所述第二传输消息包括多接入PDU会话参数，所述多接入PDU会话参数包括PDU会话建立请求消息，所述PDU会话建立请求消息中包括第二多接入指示信息和会话标识，或者，所述多接入PDU会话参数包括第三多接入指示信息和所述会话标识；
所述会话管理功能实体根据所述多接入PDU会话参数为所述用户设备建立多接入PDU会话；
其中，所述第二多接入指示信息用于指示所述用户设备请求为所述会话标识对应的会话业务建立多接入PDU会话，所述第三多接入指示信息用于指示允许为所述会话标识对应的会话业务建立多接入PDU会话。
结合第十六方面，在第十六方面的一种可能的实现方式中，所述会话管理功能实体根据所述多接入PDU会话参数为所述用户设备建立多接入PDU会话之前，所述方法还包括：
所述会话管理功能实体获取所述用户设备的签约信息；
所述会话管理功能实体根据所述签约信息或策略信息或第二多接入指示信息或第三多接入指示信息中的至少一个允许为所述会话标识对应的会话业务建立多接入PDU会话。
结合第十六方面或第十六方面的一种可能的实现方式，在第十六方面的另一种可能的实现方式中，所述方法还包括：
所述会话管理功能实体向用户面功能实体UPF发送会话新建或更新消息，所述会话新建或更新消息用于指示所述UPF为会话业务新建与第二通信网络的接入网侧对应的隧道标识。
结合第十六方面或第十六方面的任一种可能的实现方式，在第十六方面的另一种可能的实现方式中，当所述会话管理功能实体根据所述签约信息中的会话业务签约数据确定会话标识对应的会话业务不允许建立多接入PDU会话，所述方法还包括：
所述会话管理功能实体向UPF发送会话新建或更新消息，所述会话更新或新建消息用 于指示所述UPF更新所述会话业务的接入网侧隧道标识，所述更新所述会话业务的接入网侧隧道标识包括存储与第二通信网络的接入网侧对应隧道标识，并删除或更新与第一通信网络的接入网络侧对应的隧道标识。
结合第十六方面或第十六方面的任一种可能的实现方式，在第十六方面的另一种可能的实现方式中，所述方法还包括：
所述会话管理功能实体基于所述会话标识查找PDU会话对应的UPF；
所述会话管理功能实体向用户面功能实体UPF发送会话新建或更新消息，包括：
所述会话管理功能实体选择所述UPF中的N3接口UPF或上行分类UPF或分支点UPF或锚点UPF发送所述会话新建或更新消息。
结合第十六方面或第十六方面的任一种可能的实现方式，在第十六方面的另一种可能的实现方式中，所述方法还包括：
所述会话管理功能实体向UPF发送第四多接入指示信息和/或接入类型信息，所述第四多接入指示信息和/或接入类型信息用于指示存储第一通信网络与第二通信网络的接入网侧隧道标识。
结合第十六方面或第十六方面的任一种可能的实现方式，在第十六方面的另一种可能的实现方式中，所述方法还包括：
所述会话管理功能实体向UPF发送接入类型信息与隧道标识的对应关系；或者，
所述会话管理功能实体向所述UPF发送数据包的转发规则；或者，
所述所述会话管理功能实体向所述UPF发送接入类型信息与隧道标识对应关系、以及数据包的转发规则；
其中，所述数据包的转发规则包括数据流描述信息和接入类型信息的对应关系。
结合第十六方面或第十六方面的任一种可能的实现方式，在第十六方面的另一种可能的实现方式中，所述方法还包括：
所述会话管理功能实体向所述移动性管理功能实体发送第五多接入指示信息和会话标识，所述第五多接入指示信息用于指示所述会话标识对应的会话业务为多接入PDU会话。
结合第十六方面或第十六方面的任一种可能的实现方式，在第十六方面的另一种可能的实现方式中，所述方法还包括：
所述会话管理功能实体向PCF发送第七多接入指示信息、会话标识和接入类型信息，所述第七多接入指示信息用于指示所述会话标识对应的PDU会话为多接入PDU会话；或者，
所述会话管理功能实体向所述PCF发送第四传输消息，所述第四传输消息包括会话标识、第一通信网络的接入类型信息与第二通信网络的接入类型信息，所述第四传输消息用于指示所述PCF存储所述会话标识与第一通信网络的接入类型信息及第二通信网络的接入类型信息的绑定关系。
第十七方面，本发明实施例提供一种多接入场景中的连接处理方法，包括：
用户设备在第一通信网络和第二通信网络发起注册；在注册成功之后，所述用户设备向核心网网络设备发送非接入层消息，所述非接入层消息包括多接入PDU会话参数；
其中，所述多接入PDU会话参数用于指示所述用户设备请求建立多接入PDU会话。
结合第十七方面，在第十七方面的一种可能的实现方式中，所述多接入PDU会话参数 包括第二多接入指示信息和会话标识，其中，所述第二多接入指示信息用于指示所述用户设备请求为所述会话标识对应的会话建立多接入PDU会话；或者，
所述多接入PDU会话参数包括多接入PDU会话标识列表，所述多接入PDU会话标识列表包括至少一个会话标识，所述多接入PDU会话标识列表用于指示所述用户设备请求为所述至少一个会话标识对应的会话分别建立多接入PDU会话。
结合第十七方面或第十七方面的一种可能的实现方式，在第十七方面的另一种可能的实现方式中，所述用户设备向核心网功能实体发送非接入层消息之前，所述方法还包括：
所述用户设备判断所述第一通信网络和所述第二通信网络是否属于相同的PLMN；和/或，用户设备判断是否已经在第一通信网络或第二通信网络建立PDU会话。
结合第十七方面或第十七方面的一种可能的实现方式，在第十七方面的另一种可能的实现方式中，所述用户设备向核心网网络设备发送非接入层消息，包括：
当所述第一通信网络和所述第二通信网络属于相同的PLMN时，所述用户设备向所述核心网功能实体发送非接入层消息；或者，
当所述第一通信网络和所述第二通信网络属于相同的PLMN，且用户设备已经在第一通信网络或第二通信网络建立所述PDU会话时，所述用户设备向所述核心网功能实体发送非接入层消息。
结合第十七方面或第十七方面的一种可能的实现方式，在第十七方面的另一种可能的实现方式中，所述用户设备向核心网网络设备发送非接入层消息，包括：
所述用户设备确定已经建立的PDU会话处于连接态时，所述用户设备向核心网功能实体发送非接入层传输消息，所述多接入PDU会话参数包括第二多接入指示信息和会话标识。
结合第十七方面或第十七方面的一种可能的实现方式，在第十七方面的另一种可能的实现方式中，所述用户设备向核心网网络设备发送非接入层消息，包括：
所述用户设备确定已经建立的PDU会话处于非激活态时，所述用户设备向所述核心网网络设备发送所述服务请求消息，所述服务请求消息包括所述多接入PDU会话标识列表。
上述核心网网络设备可以包括移动性管理功能实体或会话管理功能实体。
第十八方面，本发明实施例提供一种多接入场景中的连接处理方法，包括：
用户面功能实体UPF接收会话管理功能实体SMF发送的第四多接入指示信息；
所述UPF基于所述第四多接入指示信息为PDU会话存储第一通信网络的接入网侧隧道标识与第二通信网络的接入网侧隧道标识。
结合第十八方面，在第十八方面的一种可能的实现方式中，所述方法还包括：
所述UPF接收所述SMF发送的接入类型信息与接入网侧隧道标识的对应关系，所述UPF存储所述接入类型信息与接入网侧隧道标识的对应关系，所述接入网侧隧道标识包括所述第一通信网络的接入网侧隧道标识或所述第二通信网络的接入网侧隧道标识。
结合第十八方面或第十八方面的一种可能的实现方式，在第十八方面的另一种可能的实现方式中，所述方法还包括：
所述UPF接收所述SMF发送的数据包的转发规则，所述数据包的转发规则包括数据流描述信息和接入类型信息的对应关系，所述UPF存储数据流描述信息与接入类型信息的对应关系；
所述UPF接收数据包，根据所述数据流描述信息与接入类型信息的对应关系确定所述数据包对应的接入类型信息；
所述UPF根据所述数据包对应的接入类型信息、以及所述接入类型信息与接入网侧隧道标识的对应关系，将所述数据包发送给所述接入类型信息对应的接入网侧隧道。
第十九方面，本发明实施例提供一种多接入场景中的连接处理方法，包括：
用户面功能实体UPF接收会话管理功能实体SMF发送的接入类型信息；
所述UPF基于所述接入类型信息为PDU会话存储接入网侧隧道标识和所述接入类型信息的对应关系，所述接入网侧隧道标识包括所述第一通信网络的接入网侧隧道标识或所述第二通信网络的接入网侧隧道标识。
结合第十九方面，在第十九方面的一种可能的实现方式中，所述方法还包括：
所述UPF接收所述SMF发送的数据包的转发规则，所述数据包的转发规则包括数据流描述信息和接入类型信息的对应关系，所述UPF存储数据流描述信息与接入类型信息的对应关系；
所述UPF接收数据包，根据所述数据流描述信息与接入类型信息的对应关系确定所述数据包对应的接入类型信息；
所述UPF根据所述数据包对应的接入类型信息、所述UPF存储的所述接入网侧隧道标识和所述接入类型信息的对应关系，将所述数据包发送给所述接入类型信息对应的接入网侧隧道。
第二十方面，本发明实施例提供一种会话管理功能实体，该会话管理功能实体具有实现上述方法实施例中会话管理功能实体行为的功能。该功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。该硬件或软件包括一个或多个与上述功能相对应的模块。
第二十一方面，本发明实施例提供一种会话管理功能实体，包括：处理器、存储器、总线和通信接口；该存储器用于存储计算机执行指令，该处理器与该存储器通过该总线连接，当该移动性管理功能实体运行时，该处理器执行该存储器存储的该计算机执行指令，以使该会话管理功能实体执行如上述第十六方面任意一项的多接入场景中的连接处理方法。
第二十二方面，本发明实施例提供了一种计算机可读存储介质，用于储存为上述会话管理功能实体所用的计算机软件指令，当其在计算机上运行时，使得计算机可以执行上述第十六方面中任意一项的多接入场景中的连接处理方法。
第二十三方面，本发明实施例提供了一种包含指令的计算机程序产品，当其在计算机上运行时，使得计算机可以执行上述第十六方面中任意一项的多接入场景中的连接处理方法。
第二十四方面，本发明实施例提供一种用户设备，包括：
注册模块，用于在第一通信网络和第二通信网络发起注册；
处理模块，用于在注册成功之后，通过发送模块向核心网网络设备发送非接入层消息，所述非接入层消息包括多接入PDU会话参数，其中，所述多接入PDU会话参数用于指示所述用户设备请求建立多接入PDU会话。
结合第二十四方面，在第二十四方面的一种可能的实现方式中，所述多接入PDU会话 参数包括第二多接入指示信息和会话标识，其中，所述第二多接入指示信息用于指示所述用户设备请求为所述会话标识对应的会话建立多接入PDU会话；或者，
所述多接入PDU会话参数包括多接入PDU会话标识列表，所述多接入PDU会话标识列表包括至少一个会话标识，所述多接入PDU会话标识列表用于指示所述用户设备请求为所述至少一个会话标识对应的会话分别建立多接入PDU会话。
结合第二十四方面或第二十四方面的一种可能的实现方式，在第二十四方面的另一种可能的实现方式中，所述处理模块还用于在向核心网功能实体发送非接入层消息之前，判断所述第一通信网络和所述第二通信网络是否属于相同的PLMN；和/或，判断已经在第一通信网络或第二通信网络建立PDU会话。
第二十五方面，本发明实施例提供一种用户设备，包括：处理器、存储器、总线和通信接口；该存储器用于存储计算机执行指令，该处理器与该存储器通过该总线连接，当该用户设备运行时，该处理器执行该存储器存储的该计算机执行指令，以使该用户设备执行如上述第十七方面任意一项的多接入场景中的连接处理方法。
第二十六方面，本发明实施例提供了一种计算机可读存储介质，用于储存为上述用户设备所用的计算机软件指令，当其在计算机上运行时，使得计算机可以执行上述第十七方面中任意一项的多接入场景中的连接处理方法。
第二十七方面，本发明实施例提供了一种包含指令的计算机程序产品，当其在计算机上运行时，使得计算机可以执行上述第十七方面中任意一项的多接入场景中的连接处理方法。
第二十八方面，本发明实施例提供一种用户面功能实体，该用户面功能实体具有实现上述方法实施例中用户面功能实体行为的功能。该功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。该硬件或软件包括一个或多个与上述功能相对应的模块。
第二十九方面，本发明实施例提供一种用户面功能实体，包括：处理器、存储器、总线和通信接口；该存储器用于存储计算机执行指令，该处理器与该存储器通过该总线连接，当该用户面功能实体运行时，该处理器执行该存储器存储的该计算机执行指令，以使该用户面功能实体执行如上述第十八方面任意一项或第十九方面任意一项的多接入场景中的连接处理方法。
第三十方面，本发明实施例提供了一种计算机可读存储介质，用于储存为上述用户面功能实体所用的计算机软件指令，当其在计算机上运行时，使得计算机可以执行上述第十八方面任意一项或第十九方面任意一项的多接入场景中的连接处理方法。
第三十一方面，本发明实施例提供了一种包含指令的计算机程序产品，当其在计算机上运行时，使得计算机可以执行上述第十八方面任意一项或第十九方面任意一项的多接入场景中的连接处理方法。
本发明实施例多接入场景中的连接处理方法和装置，可以实现用户设备在第一通信网络注册成功后再次连接注册至第二通信网络，从而实现用户设备在第一通信网络和第二通信网络的多接入注册，以满足用户设备在第一通信网络与第二通信网络多注册的需求。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作一简单地介绍。
图1为本发明实施例的一个通信系统100的结构示意图；
图2为本发明实施例的另一个系统架构示意图；
图3为本发明实施例提供的一种AMF 200的结构示意图；
图4为本发明实施例一种多接入场景中的连接处理方法的流程图；
图5为本发明实施例另一种多接入场景中的连接处理方法的流程图；
图6为本发明实施例另一种多接入场景中的连接处理方法的流程图；
图7为本发明实施例另一种多接入场景中的连接处理方法的流程图；
图8为本发明实施例另一种多接入场景中的连接处理方法的流程图；
图9为本发明实施例的一种移动性管理功能实体的结构示意图；
图10为本发明实施例的一种会话管理功能实体的结构示意图；
图11为本发明实施例的一种用户设备的结构示意图；
图12为本发明实施例的另一个系统架构示意图；
图13为本发明实施例另一种多接入场景中的连接处理方法的流程图；
图14为本发明实施例另一种多接入场景中的连接处理方法的流程图；
图15为本发明实施例的另一种用户设备的结构示意图；
图16为本发明实施例的另一种用户面功能实体的结构示意图；
图17为本发明实施例的另一种会话管理功能实体的结构示意图。
具体实施方式
为使本发明实施例的目的、技术方案和优点更加清楚，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。
图1为本发明实施例的一个通信系统100的结构示意图，如图1所示，本实施例的通信系统100可以包括移动性管理功能实体101和会话管理功能实体102，其中，移动性管理功能实体101与会话管理功能实体102通信连接，移动性管理功能实体101可以根据第一多接入指示信息和标识信息确定用户设备在第一通信网络已注册且发起了在第二通信网络的注册，或者可以根据接入类型指示信息和标识信息确定用户设备在第一通信网络已注册且发起了在第二通信网络的注册，执行所述用户设备在所述第二通信网络的注册流程，从而实现用户设备在第一通信网络和第二通信网络的多接入注册，以满足用户设备在第一通信网络与第二通信网络多注册的需求。在用户设备在第一通信网络与第二通信网络注册成功后，会话管理功能实体102可以接收移动性管理功能实体101发送的第二传输消息，所述第二传输消息包括用户设备的永久标识和PDU会话建立请求信息，所述PDU会话建立请求信息包括所述会话标识和所述第二多接入指示信息，所述第二多接入指示信息用于指示所述用户设备请求为所述会话标识对应的会话业务建立多接入PDU会话，会话管理功能实体102根据所述PDU会话建立请求信息为所述会话标识对应的会话业务建立多接入会话，从而可以实现多接入会话的建立。
可选的，图1所示的系统还可以包括用户设备、第二通信网络的接入网设备等，其中，用户设备在第一通信网络注册成功且需要在第二通信网络注册时，向第二通信网络的接入网设备发送注册请求消息，该注册请求消息具体包括第一多接入指示信息和标识信息，接入网设备根据所述标识信息选择所述第一通信网络的移动性管理功能实体101，所述接入网设备向所述移动性管理功能实体101发送该第一传输消息，该第一传输消息包括注册请求消息和接入类型指示信息，所述移动性管理功能实体101接收该第一传输消息，以实现用户设备在第一通信网络和第二通信网络的多接入注册。可选的，该第一传输消息还可以包括上述PDU会话建立请求信息，以实现多接入会话的建立。
需要说明的是，上述图1所示的系统中的移动性管理功能实体、会话管理功能实体等仅是一个名字，名字对设备本身不构成限定。在未来的5G网络以及未来其它的网络中，移动性管理功能实体、会话管理功能实体所对应的网元或实体也可以是其他的名字，本发明实施例对此不作具体限定。例如，该移动性管理功能实体还有可能被替换为移动性管理功能或者移动性管理等，该会话管理功能实体还有可能被替换为会话管理功能或者会话管理等，在此进行统一说明，以下不再赘述。在5G网络中该移动性管理功能实体的具体表现形式可以是接入与移动性管理功能实体(Core Access and Mobility Management Function，AMF)，该会话管理功能实体的具体表现形式可以是会话管理功能实体(Session Management Function，SMF)。下述实施例具体采用AMF和SMF对本发明实施例的多接入场景中的连接处理方法进行具体解释说明。
图2为本发明实施例的另一个系统架构示意图，图2所示的系统架构可以是图1所示的通信系统的一种具体表现形式，如图2所示，本实施例的系统架构可以称为5G网络架构，该网络架构不但支持3GPP标准组定义的无线技术(如LTE，5G RAN等)接入核心网络侧，本发明实施例的核心网络侧可以称为5G核心网络侧(5G Core network)，而且支持non-3GPP接入技术通过non-3GPP转换功能实体(non-3GPP Interworking Function，N3IWF)或下一代接入网关(next Generation packet data Gateway，ngPDG)或固网接入网关或可信non3GPP接入网关接入核心网络侧。即本发明实施例的系统架构支持UE通过不同的接入技术接入5G核心网络侧。其中核心网功能分为用户面网元功能实体(User plane function，UPF)与控制面网元功能实体(Control plane function，CPF)。用户面网元功能实体主要负责分组数据包的转发、QoS控制、或计费信息统计等。控制面网元功能实体主要负责用户注册认证、移动性管理、向用户面(UPF)下发数据包转发策略、或QoS控制策略等。其中，CPF可以进一步细分为接入与移动性管理功能实体(Core Access and Mobility Management Function，AMF)与会话管理功能实体(Session Management Function，SMF)。具体的，AMF负责用户接入时的注册流程及用户移动过程中的位置管理。SMF负责用户发起业务时核心网络侧建立相应的会话连接，为用户提供具体服务等。此外，核心网络侧还可以包括独立的鉴权认证功能实体(Authentication Server Function，AUSF)，负责用户注册时基于用户签约数据中的鉴权向量对用户真实性进行认证。用户签约数据存储在用户签约数据管理功能实体(Subscriber/User Data Management，SDM/UDM)中，其中鉴权认证相关的密钥和鉴权向量存储在鉴权证书库中(Authentication Credential Repository and Processing Function，ARPF)。
第一通信网络的接入技术或第二通信网络的接入技术包括：3GPP接入技术，non3GPP接入技术，固定网络接入技术(或固网接入技术、有线接入技术)，WLAN接入技术，可信WLAN接入技术，非可信WLAN接入技术，5G RAN接入技术，LTE接入技术等。
上述接入技术可以通过接入类型信息或无线接入类型信息进行指示。其中，接入类型信息也可以称之为接入类型指示信息。
具体的，如图2所示，UE可以通过RAN和/或N3IWF与AMF连接，AMF分别与SMF、SDM/UDM和ARPF连接，SMF与UPF连接，UPF与数据网络(Data Network，DN)连接，DN具体可以是Internet，也可以是IMS网络。
如图2所示，系统架构中的接口和连接包括：NG1、NG2、NG3、NG4、和NG11。其中，NG1为用户设备和AMF之间的控制面连接，用于传输用户设备和核心网控制面之间的控制信令，具体的NG1连接中的消息可以由UE和RAN之间的连接、RAN和AMF之间的NG2连接进行传输，或者可以由UE和N3IWF之间的连接、N3IWF和AMF之间的NG2连接进行传输。NG2为RAN和AMF之间的控制面连接，N3IWF和AMF之间的控制面连接，用于传输核心网控制面和RAN或者N3IWF之间的控制信令，以及支持UE和核心网控制面之间的NG1连接。NG3为RAN、N3IWF和用户面功能之间的连接，用于支持为用户设备建立的协议数据单元(Protocol Data Unit，简称PDU)会话连接。NG4为SMF和用户面功能之间的连接，用于传递SMF和用户面功能之间的控制信令。NG11为AMF和SMF之间的连接，用于传输会话业务相关的控制信令。
具体的，如图2所示的AMF、SMF以及UE可以执行下述方法实施例的步骤以实现UE从non-3GPP注册成功后再次连接到3GPP侧时，网络侧可以实现UE在3GPP侧与non-3GPP侧多注册。或者，实现UE从3GPP注册成功后再次连接到non-3GPP侧时，网络侧可以实现UE在3GPP侧与non-3GPP侧多注册。
进一步的，还可以实现在UE多注册的前提下同时实现多接入会话建立，节省会话建立时延，有效提升用户业务体验。
需要说明的是，上述图2所示的系统架构中的AMF、SMF、UPF等除了具备本发明实施例中的功能，还可能具备其他的功能，本发明实施例对此不作具体限定。
需要说明的是，本文所涉及的无线接入网(Radio Access Network，RAN)设备，是一种将终端接入到无线网络的设备，可以是全球移动通讯(Global System of Mobile communication，GSM)或码分多址(Code Division Multiple Access，CDMA)中的基站(Base Transceiver Station，BTS)，也可以是宽带码分多址(Wideband Code Division Multiple Access，WCDMA)中的基站(NodeB，NB)，还可以是长期演进(Long Term Evolution，LTE)中的演进型基站(Evolutional Node B，eNB或eNodeB)，或者中继站或接入点，或者未来5G网络中的基站等，在此并不限定。
本文所涉及的用户设备(User Equipment，UE)可以表示任意适用的端用户设备，可以包括(或可以表示)诸如无线发送/接收单元(wireless transmit/receive unit，WTRU)、移动站、移动节点、移动设备、固定或移动签约单元、寻呼机、移动电话、掌上电脑(personal digital assistant，PDA)、智能手机、笔记本型电脑、计算机、触摸屏设备、无线传感器或消费电子设备等设备。此处的“移动”站/节点/设备表示与无线(或移动)网络连接 的站/节点/设备，而并不一定与该站/节点/设备的实际移动性有关。
本文所涉及的“多个”是指两个或两个以上。“和/或”，描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。字符“/”一般表示前后关联对象是一种“或”的关系。
需要说明的是，本发明实施例所涉及的Non-3GPP接入网关名称可以为上述N3IWF，也可以为ngPDG，还可以是其他支持non-3GPP接入的名称，本发明实施例对此不作限制。
需要说明的是，本发明实施例所涉及的多接入注册，也可以称之为多区域注册，即“多接入”可以采用“多区域”替换，本发明实施例对此不作限制。
需要说明的是，本发明实例所涉及的“第一传输消息”和“第二传输消息”仅用于区分不同接口的传输消息，其消息名称并不以此作为限制。
图3为本发明实施例提供的一种AMF 200的结构示意图，该AMF 200包括：至少一个处理器201、至少一个网络接口203、存储器204和至少一个通信总线202。通信总线202用于实现这些组件之间的连接通信。存储器204可以包括只读存储器和随机存取存储器，并向处理器201提供指令和数据。存储器204的一部分还可以包括非易失性随机存取存储器(NVRAM)。
在本发明实施例中，通过调用存储器204存储的程序或指令，处理器201用于执行下述方法实施例的步骤，从而可以实现用户设备在第一通信网络注册成功后再次连接注册至第二通信网络，进而实现用户设备在第一通信网络和第二通信网络的多接入注册，以满足用户设备在第一通信网络与第二通信网络多注册的需求，具体实现过程可以参见下述各方法实施例。
需要说明的是，本发明实施例的上述AMF也可以采用网络功能虚拟化(Network Function Virtualization，简称NFV)技术实现。
需要说明的是，本发明实施例所涉及的AMF、SMF和UPF，均可能由一个实体设备实现，也可能由多个实体设备共同实现，本申请实施例对此不作具体限定。即，可以理解的是，本发明实施例中的AMF、SMF、UPF等，都可能是实体设备内的一个逻辑功能模块，也可能是由多个实体设备组成的一个逻辑功能模块，本发明实施例对此不作具体限定。
本文所涉及的“第一通信网络”和“第二通信网络”仅用于区分不同的通信网络，其中，“第一通信网络”用于表示UE已注册的网络，“第二通信网络”用于表示UE已注册到第一通信网络后，向另一个通信网络的注册的网络。第一通信网络和第二通信网络可以是不同的接入网相同的核心网，即如图2所示，UE可以通过不同的接入网设备接入核心网。举例而言，当第一通信网络为3GPP网络，第一通信网络的接入网设备即为RAN设备，那么第二通信网络为Non-3GPP网络，第二通信网络的接入网设备即为N3IWF，换言之，当第一通信网络为Non-3GPP网络，第一通信网络的接入网设备即为N3IWF，那么第二通信网络为3GPP网络，第二通信网络的接入网即为RAN。
图4为本发明实施例一种多接入场景中的连接处理方法的流程图，如图4所示，本实施例的方法可以包括：
步骤101、用户设备在第一通信网络注册成功且需要在第二通信网络注册时，所述用户设备向所述第二通信网络的接入网设备发送注册请求消息或参数。第二通信网络的接入 网设备接收该注册请求消息或参数。
其中，所述注册请求消息或参数中具体可以包括第一多接入指示信息和标识信息。
其中，所述第一多接入指示信息用于AMF根据所述第一多接入指示信息和所述标识信息执行所述用户设备在所述第二通信网络的注册，所述标识信息用于选择网络功能实体和获取用户设备的上下文信息中的至少一个。
具体的，标识信息具体可以是临时标识(Temporary ID)信息，该临时标识信息可以为网络侧为用户分配的用户临时标识信息(Temporary User ID)或用户设备临时标识信息(Temporary UE ID)等，当然还可以是其他信息，这里不再一一举例说明。该临时标识信息中含有AMF信息，如AMF设备标识等。举例而言，如果UE与RAN侧建立连接之前UE已经通过non-3GPP注册到网络中，则临时标识为UE从non-3GPP侧获取的网络侧分配的临时标识。可以理解的，如果UE与N3IWF侧建立连接之前UE已经通过3GPP注册到网络中，则临时标识为UE从3GPP侧获取的网络侧分配的临时标识。
其中，如果用户设备向所述第二通信网络的接入网设备发送的是上述参数，第二通信网络的接入网设备接收该参数，则由该接入网设备根据该参数生成该注册请求消息。
步骤102、所述接入网设备根据所述标识信息选择所述第一通信网络的AMF。
具体的，由于用户设备已经在第一通信网络注册成功且需要在第二通信网络注册，要实现用户设备在第二通信网络的注册，首先接入网设备需要根据标识信息确定AMF，该AMF为用户设备在第一通信网络注册的AMF，该AMF上存储有该UE的上下文信息和签约信息。
步骤103、所述接入网设备向所述AMF发送第一传输消息。
AMF接收接入网设备发送的第一传输消息。该第一传输消息具体可以是第一传输消息，也可以是其他消息，本发明实施例对此不作限制。
其中，所述第一传输消息包括注册请求消息和接入类型指示(Radio Access type，RAT type)信息。其中，该注册请求消息即为步骤101中用户设备发送的注册请求消息。该接入类型指示信息为接入网络设备生成的。
具体的，所述接入网设备为3GPP无线接入网设备时，所述接入类型指示信息为3GPP接入类型、无线接入网络RAN接入类型、或长期演进LTE接入类型中任意一个；或者，所述接入网设备为非3GPP接入转换功能实体N3IWF时，所述接入类型指示信息为非3GPP接入类型、无线局域网WLAN接入类型、或固定网络接入类型任意一个。
步骤104、所述AMF根据所述接入类型指示信息和所述标识信息、或者所述AMF根据所述第一多接入指示信息和所述标识信息确定所述用户设备在第一通信网络已注册且发起了在第二通信网络的注册。
步骤105、所述AMF执行所述用户设备在所述第二通信网络的注册流程。
具体的，AMF在确定用户设备在第一通信网络已注册且发起了在第二通信网络的注册，则直接执行步骤105，完成用户设备在第二通信网络的注册，从而使得用户设备在第一通信网络和第二通信网络中注册，即实现多接入注册。
可选的，上述步骤104的实现方式具体可以包括以下三种实现方式：
方式一，所述AMF根据所述标识信息获取所述用户设备的上下文信息，所述AMF根据所述用户设备的上下文信息确定所述用户设备在第一通信网络已注册，所述AMF根据所述 接入类型指示信息确定所述用户设备发起了在第二通信网络的注册。
方式二，第一多接入指示信息具体可以包括多接入能力指示信息和位置区域注册指示信息中的至少一项，相应的，步骤104具体实现方式为：所述AMF根据所述标识信息获取所述用户设备的上下文信息，所述AMF根据所述用户设备的上下文信息确定所述用户设备在第一通信网络已注册，所述AMF根据所述多接入能力指示信息或位置区域注册指示信息确定所述用户设备发起了在所述第二通信网络的注册。
其中，第一多接入指示信息为多接入能力指示信息的实现方式可以为：将UE能力参数设置为多接入能力指示(multi-access capability indication)。
方式三，所述AMF根据所述接入类型指示信息、所述第一多接入指示信息和所述标识信息确定所述用户设备在第一通信网络已注册且发起了在第二通信网络的注册。
本实施例，用户设备在第一通信网络注册成功且需要在第二通信网络注册时，向第二通信网络的接入网设备发送注册请求消息，该注册请求消息具体包括第一多接入指示信息和标识信息，接入网设备根据所述标识信息选择所述第一通信网络的AMF，所述接入网设备向所述AMF发送第一传输消息，所述第一传输消息包括注册请求消息和接入类型指示信息，所述AMF根据所述接入类型指示信息和所述标识信息、或者所述第一多接入指示信息和所述标识信息确定所述用户设备在第一通信网络已注册且发起了在第二通信网络的注册，执行所述用户设备在所述第二通信网络的注册流程，从而可以实现用户设备在第一通信网络注册成功后再次连接注册至第二通信网络，从而实现用户设备在第一通信网络和第二通信网络的多接入注册，以满足用户设备在第一通信网络与第二通信网络多注册的需求。
下面采用一个具体的实施例，对图4所示方法实施例的技术方案进行详细说明。
图5为本发明实施例另一种多接入场景中的连接处理方法的流程图，如图5所示，本实施例的方法可以包括：
步骤201-步骤204，同步骤101-步骤104，其具体解释说明可以参见图4所示实施例步骤101-步骤104，此处不再赘述。
步骤205、所述AMF根据所述用户设备的签约信息判断是否允许所述用户设备在第一通信网络和第二通信网络注册，若是，则执行步骤206，否则，执行步骤207。
具体的，在步骤204中AMF可以获取用户设备的上下文信息，该上下文信息中包括该用户设备的永久标识，该永久标识可以是国际移动用户识别码(International Mobile Subscriber Identification Number，IMSI)，AMF根据该永久标识获取该用户设备的签约信息，根据该签约信息判断是否允许所述用户设备在第一通信网络和第二通信网络注册。
步骤206、所述AMF执行所述用户设备在所述第二通信网络的注册流程。
具体的，AMF完成用户设备在所述第二通信网络的注册流程，存储用户设备在第一通信网络和第二通信网络多接入注册的状态，即用户设备在第一通信网络和第二通信网络同时注册的状态。
步骤207、所述AMF执行所述用户设备在所述第二通信网络的注册流程，并发起所述用户设备在所述第一通信网络的去注册流程或删除所述用户设备在所述第一通信网络的注册状态。
具体的，由于不允许用户设备在第一通信网络和第二通信网络同时注册，所以AMF执 行所述用户设备在所述第二通信网络的注册流程，并且当用户设备处于连接态时，发起用户设备在所述第一通信网络的去注册流程，当用户设备处于空闲态时，删除所述用户设备在所述第一通信网络的注册状态。
可选的一种实现方式，判断是否允许所述用户设备在第一通信网络和第二通信网络注册，还可以是AMF根据签约信息和/或本地配置信息判断是否允许所述用户设备在第一通信网络和第二通信网络注册，该本地配置信息具体为运营商配置的本地策略，该本地配置信和单个UE没有直接关系，本地配置信息可以是更大粒度的控制，比如运营商配置漫游用户不允许多接入注册，或不允许用户在不同的PLMN多接入注册。
可选的，在步骤206之后，还可以包括AMF发送注册成功消息给UE，UE回复注册完成消息给AMF。
本实施例，可以实现用户设备在第一通信网络注册成功后需要连接注册至第二通信网络时，根据用户设备的签约信息判断是否允许用户设备在第一通信网络和第二通信网络的多接入注册，以满足用户设备在第一通信网络与第二通信网络多接入注册的需求。
上述图4和图5所示实施例均为用于在多接入场景下实现用户设备在第一通信网络和第二通信网络多注册，在上述实施例的基础上，本发明实施例还可以实现多接入会话的建立，具体的，上述图4和图5所示实施例中的注册请求消息还包括第二多接入指示信息，AMF完成所述用户设备在所述第二通信网络的注册流程后，通过下述图6所示实施例完成多接入会话的建立，具体详见图6所示实施例的解释说明。
图6为本发明实施例另一种多接入场景中的连接处理方法的流程图，如图6所示，本实施例的方法可以包括：
步骤301、用户设备在第一通信网络注册成功且需要在第二通信网络注册时，所述用户设备向所述第二通信网络的接入网设备发送注册请求消息或参数。第二通信网络的接入网设备接收用户设备发送的该注册请求消息或参数。
在上述实施例基础上，该注册请求消息或参数中还包括PDU会话建立请求信息，该PDU会话建立请求信息包括第二多接入指示信息和会话标识。该第二多接入指示信息用于指示所述用户设备请求为所述会话标识对应的会话业务建立多接入PDU会话。
步骤302、所述接入网设备根据所述标识信息选择所述第一通信网络的AMF。
步骤303、所述接入网设备向所述AMF发送第一传输消息。AMF接收接入网设备发送的第一传输消息。
该第一传输消息在上述实施例的基础上还包括该PDU会话建立请求信息。
步骤304、所述AMF根据所述接入类型指示信息和所述标识信息、或者所述AMF根据所述第一多接入指示信息和所述标识信息确定所述用户设备在第一通信网络已注册且发起了在第二通信网络的注册。
步骤305、所述AMF执行所述用户设备在所述第二通信网络的注册流程。
上述步骤301-步骤305的具体解释说明可以参见图4和图5，此处不再一一赘述。
步骤306、所述AMF向所述SMF发送第二传输消息。SMF接收AMF发送的第二传输消息。
其中，所述第二传输消息具体可以是N11接口传输消息，也可以是其他消息，本发明 实施例对此不作限制。所述第二传输消息包括用户设备永久标识和PDU会话建立请求信息，所述PDU会话建立请求信息包括会话标识(PDU session ID)和所述第二多接入指示信息，所述第二多接入指示信息用于指示所述用户设备请求为所述会话标识对应的会话业务建立多接入PDU会话。
步骤307、SMF基于所述用户设备的永久标识获取所述用户设备的签约信息。
步骤308、SMF根据所述签约信息中的会话业务签约数据判断所述会话标识对应的会话业务是否允许建立多接入PDU会话，若是，则执行步骤309，若否，则执行步骤310。
步骤309、SMF向UPF发送PDU会话新建或更新请求消息，所述PDU会话新建或更新请求消息用于指示所述UPF为所述会话业务新建与第二通信网络的接入网侧对应的隧道标识，如F-TEID(IP address-Tunnel Endpoint Identifier)。
其中，该UPF为该用户设备的上下文信息中存储的UPF，即SMF根据PDU session ID查找第一通信网络相同PDU连接对应的UPF，UPF根据该PDU会话新建或更新请求消息为所述会话业务新建与第二通信网络的接入网侧对应的隧道标识，并将该隧道标识通知该第二通信网络的接入网设备，从而建立第二通信网络的接入网设备与该UPF之间的隧道，实现多接入会话建立。
步骤310、SMF向UPF发送PDU会话更新或新建请求消息，所述PDU会话更新或新建请求消息用于指示所述UPF更新所述会话业务的接入网侧隧道标识。UPF接收SMF发送的PDU会话更新或新建请求消息。
具体的，所述更新所述会话业务的接入网侧隧道标识包括存储与第二通信网络的接入网侧对应隧道标识，并删除或更新与第一通信网络的接入网络侧对应的隧道标识。
步骤311、UPF向SMF发送连接建立回复消息。SMF接收UPF发送的连接建立回复消息。
可选的，所述第二传输消息还包括第三多接入指示信息，所述第三多接入指示信息包括多接入注册指示、多接入允许指示、和多接入状态指示中的任意一个；其中，所述多接入注册指示用于指示所述用户设备在所述第一通信网络和第二通信网络多接入注册，所述多接入允许指示用于指示允许所述用户设备同时接入所述第一通信网络与所述第二通信网络，所述多接入状态指示用于指示所述用户设备同时接入所述第一通信网络与所述第二通信网络的状态。相应的，步骤308可以为SMF根据所述第三多接入指示信息和所述签约信息中的会话业务签约数据判断所述会话标识对应的会话业务是否允许建立多接入PDU会话。
本实施例，在实现用户设备在第一通信网络和第二通信网络的多接入注册的基础上，进一步可以实现多接入会话建立。
下面采用一个具体的实施例对应用场景为第一通信网络的接入网设备为N3IWF，第二通信网络的接入网设备为RAN设备时，图4所示实施例进行解释说明。
图7为本发明实施例另一种多接入场景中的连接处理方法的流程图，如图7所示，本实施例的方法可以包括：
S401、UE在Non-3GPP网络注册成功且需要在3GPP网络注册时，UE向RAN设备发送注册请求消息。RAN设备接收UE发送的注册请求消息。
其中，该注册请求消息可以包括第一多接入指示信息和标识信息，详见上述实施例的 具体解释说明，此处不再赘述。
S402、RAN设备根据所述标识信息选择Non-3GPP网络的AMF。
S403、RAN设备向AMF发送第一传输消息。AMF接收RAN设备发送的第一传输消息。
其中，第一传输消息包括注册请求消息和接入类型指示(Radio Access type，RAT type)信息。
S404、AMF根据接入类型指示信息和标识信息、或者AMF根据第一多接入指示信息和标识信息确定UE在Non-3GPP网络已注册且发起了在3GPP网络的注册。
S405、UE与网络侧完成双向鉴权认证。
S406、AMF根据UE的签约信息判断是否允许UE在Non-3GPP网络和3GPP网络注册，若是，则执行S407，否则，执行S408。
S407、AMF执行UE在3GPP网络的注册流程。
S408、AMF执行UE在3GPP网络的注册流程，并发起UE在Non-3GPP网络的去注册流程或删除UE在Non-3GPP网络的注册状态。
其中，发起UE在Non-3GPP网络的去注册流程或删除UE在Non-3GPP网络的注册状态的具体实现方式可以为：AMF向N3IWF发送去注册请求消息，该去注册请求消息可以包括UE永久标识或者临时标识信息等，N3IWF基于去注册请求消息删除UE的上下文信息，释放与UPF之间的连接，向AMF发送去注册响应消息。
本实施例可以实现UE在Non-3GPP网络注册成功后需要连接注册至3GPP网络时，根据UE的签约信息判断是否允许UE在3GPP网络和Non-3GPP网络的多接入注册，以满足UE在3GPP网络和Non-3GPP网络多接入注册的需求。
下面采用一个具体的实施例对应用场景为第一通信网络的接入网设备为RAN设备，第二通信网络的接入网设备为N3IWF时，图4所示实施例进行解释说明。
图8为本发明实施例另一种多接入场景中的连接处理方法的流程图，本实施例中，UE首先通过3GPP接入网(如RAN)与网络侧建立连接，并完成UE到网络侧的注册流程，后续UE与non-3GPP接入网(如WLAN接入网)建立连接，并发起non-3GPP侧的注册流程，如图8所示，本实施例的方法可以包括：
S501、UE发现non-3GPP接入网，UE与non-3GPP接入网建立无线连接。
S502、UE发起non-3GPP侧注册流程，生成注册相关的参数。
其中，该注册相关的参数可以包括第一多接入指示信息和标识信息。
具体的，上述参数的设置方式可以参见图4所示实施例，此处不再赘述。
可以理解的，如果UE在注册流程中同时发起会话连接建立流程，则上述注册相关的参数还包括PDU连接请求信息，该PDU连接请求信息具体可以参见图5所示实施例的解释说明。
S503、UE向N3IWF发送IKE_SA_INIT初始连接建立消息。N3IWF接收UE发送的IKE_SA_INIT初始连接建立消息。
该IKE_SA_INIT初始连接建立消息用于协商UE与N3IWF之间的IPSec隧道安全相关参数，从而使得UE与N3IWF建立IPSec隧道。
S504、UE向N3IWF发送IKE_AUTH请求消息。N3IWF接收UE发送的IKE_AUTH请求消 息。
该IKE_AUTH请求消息中包括S502生成的注册相关的参数。
S505、N3IWF根据标识信息选择AMF。
S506、N3WIF向AMF发送注册请求消息(Registration Request)。AMF接收N3WIF发送的注册请求消息。
该注册请求消息具体携带在第一传输消息中发送给AMF。本发明实施例不对包括注册请求消息的第一传输消息的名称做限制，比如第一传输消息也可以称为NAS Transport消息，Uplink NAS Transport消息、或鉴权请求消息等。该注册请求消息包括S502中生成的注册相关的参数。此外，N3IWF在第一传输消息中将接入类型Access type设置为non-3GPP接入，或WLAN接入、或非可信WLAN接入等。
S507、AMF进行UE在non-3GPP侧的注册认证流程。
其中，S507具体实施方式可以参见步骤204-步骤207的具体解释说明，此处不再赘述。
S508、网络侧对UE进行鉴权认证。
如果S506中的第一传输消息包括PDU连接请求信息，则还需要执行下述步骤。
S509、SMF根据所述签约信息中的会话业务签约数据判断所述会话标识对应的会话业务是否允许建立多接入PDU会话，若是，则执行S510，若否，则执行步骤511。
S510、SMF向UPF发送PDU会话新建或更新请求消息，所述PDU会话新建或更新请求消息用于指示所述UPF为所述会话业务新建与non-3GPP的接入网侧对应的隧道标识，如F-TEID。UPF接收SMF发送的PDU会话新建或更新请求消息。
S511、SMF向UPF发送PDU会话更新或新建请求消息，所述PDU会话更新或新建请求消息用于指示所述UPF更新所述会话业务的接入网侧隧道标识。UPF接收SMF发送的PDU会话更新或新建请求消息。
具体的，所述更新所述会话业务的接入网侧隧道标识包括存储与non-3GPP的接入网侧对应隧道标识，并删除或更新与3GPP的接入网络侧对应的隧道标识。
本实施例可以实现UE在3GPP网络注册成功后需要连接注册至Non-3GPP网络时，根据UE的签约信息判断是否允许UE在3GPP网络和Non-3GPP网络的多接入注册，以满足UE在3GPP网络和Non-3GPP网络多接入注册的需求。并进一步建立多接入会话建立。
在上述任一实施例的基础上，用户设备实现在第一通信网络和第二通信网络的多接入注册，之后在实现建立多接入会话过程中，所述会话管理功能实体还可以向用户面功能实体UPF发送接入类型信息与接入网侧隧道标识的对应关系；或者，所述会话管理功能实体向所述UPF发送接入类型信息与接入网侧隧道标识对应关系、以及数据包的转发规则；其中，所述数据包的转发规则包括数据流描述信息和接入类型信息的对应关系。用户面功能实体可以存储接入类型信息与接入网侧隧道标识的对应关系，或者存储接入类型信息与接入网侧隧道标识对应关系、以及数据包的转发规则，存储的上述信息可以用于后续数据转发。具体的用户面功能实体所执行的方法可以参见下述图13所示实施例中用户面功能实体所执行的方法。
所述会话管理功能实体还可以向所述移动性管理功能实体发送第五多接入指示信息 和所述会话标识，所述第五多接入指示信息用于指示所述会话标识对应的会话为多接入PDU会话。移动性管理功能实体可以根据第五多接入指示信息将所述会话标识对应的会话标注为多接入PDU会话。
所述会话管理功能实体还可以向策略控制功能实体PCF发送第七多接入指示信息、所述会话标识和接入类型信息，所述第七多接入指示信息用于指示所述会话标识对应的PDU会话为多接入PDU会话；或者，所述会话管理功能实体还可以向所述PCF发送第四传输消息，所述第四传输消息包括所述会话标识、第一通信网络的接入类型信息与第二通信网络的接入类型信息，所述第一通信网络的接入类型信息与第二通信网络的接入类型信息用于指示所述PCF存储所述会话标识与第一通信网络的接入类型信息及第二通信网络的接入类型信息的绑定关系。具体的PCF所执行的方法可以参见下述图13所示实施例中PCF所执行的方法。
具体的，会话管理功能实体所执行的方法可以参见下述图13所示实施例中会话管理功能实体所执行的方法。
图9为本发明实施例的一种移动性管理功能实体的结构示意图，如图9所示，本实施例的装置可以包括：接收模块11、确定模块12和处理模块13，其中，接收模块11用于接收接入网设备发送的第一传输消息，所述第一传输消息包括注册请求消息，所述注册请求消息包括第一多接入指示信息和标识信息，所述标识信息用于获取用户设备的上下文信息和选择网络功能实体中的至少一个，确定模块12用于根据所述第一多接入指示信息和所述标识信息确定所述用户设备在第一通信网络已注册且发起了在第二通信网络的注册，处理模块13用于执行所述用户设备在所述第二通信网络的注册流程。
可选的，所述确定模块12，具体可以用于：根据所述标识信息获取所述用户设备的上下文信息；根据所述用户设备的上下文信息确定所述用户设备在第一通信网络已注册；根据所述第一多接入指示信息确定所述用户设备发起了在所述第二通信网络的注册。
可选的，所述第一传输消息还包括接入类型指示信息，所述确定模块12，具体用于：根据所述接入类型指示信息、所述第一多接入指示信息和所述标识信息确定所述用户设备在第一通信网络已注册且发起了在第二通信网络的注册。
可选的，本实施例的装置进一步地，还可以包括：判断模块14，该判断模块14用于在所述移动性管理功能实体执行所述用户设备在所述第二通信网络的注册流程之前，根据所述用户设备的签约信息确定允许所述用户设备在所述第一通信网络和所述第二通信网络注册。
可选的，所述判断模块14还用于：若根据所述用户设备的签约信息或本地配置信息确定不允许所述用户设备在所述第一通信网络和所述第二通信网络注册，则所述处理模块13执行所述用户设备在所述第二通信网络的注册流程，并发起所述用户设备在所述第一通信网络的去注册流程或删除所述用户设备在所述第一通信网络的注册状态。
可选的，所述注册请求消息还包括第二多接入指示信息，所述移动性管理功能实体还包括：发送模块15；所述发送模块15用于向所述会话管理功能实体发送第二传输消息，所述第二传输消息包括用户设备的永久标识和PDU会话建立请求信息，所述PDU会话建立请求信息包括会话标识和第二多接入指示信息，所述第二多接入指示信息用于指示所述用 户设备请求为所述会话标识对应的会话业务建立多接入PDU会话。
本实施例的装置，可以用于执行上述方法实施例的技术方案，其实现原理和技术效果类似，此处不再赘述。
图10为本发明实施例的一种会话管理功能实体的结构示意图，如图10所示，本实施例的装置可以包括：接收模块21和处理模块22，其中，接收模块21用于接收移动性管理功能实体发送的第二传输消息，所述第二传输消息包括用户设备的永久标识和PDU会话建立请求信息，所述PDU会话建立请求信息包括会话标识和第二多接入指示信息，所述第二多接入指示信息用于指示所述用户设备请求为所述会话标识对应的会话业务建立多接入PDU会话，处理模块22用于根据所述PDU会话建立请求信息为所述会话标识对应的会话业务建立多接入会话。
可选的，所述会话管理功能实体还包括确定模块23，所述确定模块23用于在根据所述PDU会话建立请求信息为所述会话标识对应的会话业务建立多接入会话之前，基于所述用户设备的永久标识获取所述用户设备的签约信息；根据所述签约信息中的会话业务签约数据确定所述会话标识对应的会话业务允许建立多接入PDU会话。
可选的，所述第二传输消息还包括第三多接入指示；所述处理模块22还用于根据所述第三多接入指示信息确定允许所述会话标识对应的会话业务建立多接入PDU会话。
可选的，所述会话管理功能实体还包括：发送模块24，所述发送模块24用于向用户面功能实体UPF发起PDU会话新建或更新流程，所述PDU会话新建或更新流程包括所述会话管理功能实体发送PDU会话新建或更新请求消息，所述PDU会话新建或更新请求消息用于指示所述UPF为所述会话业务新建与第二通信网络的接入网侧对应的隧道标识。
可选的，若所述会话管理功能实体根据所述签约信息中的会话业务签约数据确定所述会话标识对应的会话业务不允许建立多接入PDU会话，所述发送模块24还用于：向UPF发起PDU会话更新或新建流程，所述PDU会话更新流程包括所述会话管理功能实体发送PDU会话更新或新建请求消息，所述PDU会话更新或新建请求消息用于指示所述UPF更新所述会话业务的接入网侧隧道标识，所述更新所述会话业务的接入网侧隧道标识包括存储与第二通信网络的接入网侧对应隧道标识，并删除或更新与第一通信网络的接入网络侧对应的隧道标识。
本实施例的装置，可以用于执行上述方法实施例的技术方案，其实现原理和技术效果类似，此处不再赘述。
图11为本发明实施例的一种用户设备的结构示意图，如图11所示，本实施例的装置可以包括：发送模块31和处理模块32，其中，处理模块32用于在第一通信网络注册成功且需要在第二通信网络注册时，通过所述发送模块31向所述第二通信网络的接入网设备发送注册请求消息，所述注册请求消息包括第一多接入指示信息和标识信息；其中，所述第一多接入指示信息用于网络侧接入与移动性管理功能实体移动性管理功能实体根据所述第一多接入指示信息和所述标识信息执行所述用户设备在所述第二通信网络的注册，所述标识信息用于选择网络功能实体和获取用户设备的上下文信息中的至少一个。
可选的，所述注册请求消息还包括第二多接入指示信息，所述第二多接入指示信息用于所述用户设备在所述第二通信网络注册成功后，会话管理功能实体根据所述第二接入指 示信息建立多接入会话。
本实施例的装置，可以用于执行上述方法实施例的技术方案，其实现原理和技术效果类似，此处不再赘述。
上述各个装置与其他通信网元的交互过程可以具体参见上述方法实施例的解释说明，其有益效果可以参见上述方法实施例所带来的有益效果，在此不再赘述。
图12为本发明实施例的另一个系统架构示意图，图12所示的系统架构可以是图1所示的通信系统的一种具体表现形式，如图12所示，本实施例的系统架构可以称为5G网络架构，该网络架构不但支持3GPP标准组定义的无线技术(如LTE，5G RAN等)接入核心网络侧，本发明实施例的核心网络侧可以称为5G核心网络侧(5G Core network)，而且支持non-3GPP接入技术通过non-3GPP转换功能实体(non-3GPP Interworking Function，N3IWF)或下一代接入网关(next Generation packet data Gateway，ngPDG)或固网接入网关或可信non3GPP接入网关接入核心网络侧。即本发明实施例的系统架构支持UE通过不同的接入技术接入5G核心网络侧。其中核心网功能分为用户面网元功能实体(User plane function，UPF)与控制面网元功能实体(Control plane function，CPF)。用户面网元功能实体主要负责分组数据包的转发、QoS控制、或计费信息统计等。控制面网元功能实体主要负责用户注册认证、移动性管理、向用户面(UPF)下发数据包转发策略、或QoS控制策略等。其中，CPF可以进一步细分为接入与移动性管理功能实体(Core Access and Mobility Management Function，AMF)与会话管理功能实体(Session Management Function，SMF)。具体的，AMF负责用户接入时的注册流程及用户移动过程中的位置管理。SMF负责用户发起业务时核心网络侧建立相应的会话连接，为用户提供具体服务等。此外，核心网络侧还可以包括独立的策略控制功能实体(Policy Control Function，PCF)和用户签约数据管理功能实体(Subscriber/User Data Management，SDM/UDM)，用户签约数据存储在SDM/UDM中。
具体的，如图12所示，UE可以通过RAN和/或N3IWF与AMF连接，AMF分别与SMF、SDM/UDM和PCF连接，SMF分别与AMF、SDM/UDM、PCF以及UPF连接，UPF与数据网络(Data Network，DN)连接，DN具体可以是Internet，也可以是IMS网络。
如图12所示，系统架构中的接口和连接包括：NG1、NG2、NG3、NG4、和NG11。其中，NG1为用户设备和AMF之间的控制面连接，用于传输用户设备和核心网控制面之间的控制信令，具体的NG1连接中的消息可以由UE和RAN之间的连接、RAN和AMF之间的NG2连接进行传输，或者可以由UE和N3IWF之间的连接、N3IWF和AMF之间的NG2连接进行传输。NG2为RAN和AMF之间的控制面连接，N3IWF和AMF之间的控制面连接，用于传输核心网控制面和RAN或者N3IWF之间的控制信令，以及支持UE和核心网控制面之间的NG1连接。NG3为RAN、N3IWF和用户面功能之间的连接，用于支持为用户设备建立的协议数据单元(Protocol Data Unit，简称PDU)会话连接。NG4为SMF和用户面功能之间的连接，用于传递SMF和用户面功能之间的控制信令。NG11为AMF和SMF之间的连接，用于传输会话业务相关的控制信令。
具体的，如图12所示的AMF、SMF、UPF、PCF、UDM以及UE可以执行下述方法实施例的步骤以实现建立多接入PDU会话。具体实施方式可以参见下述实施例的解释说明。
图13为本发明实施例另一种多接入场景中的连接处理方法的流程图，本实施例用于实现多接入会话的建立，如图13所示，本实施例的方法可以包括：
步骤601、用户设备向接入网设备发送非接入层(NAS)消息。接入网设备接收用户设备发送的非接入层(NAS)消息。
该非接入层(NAS)消息包括多接入PDU会话参数，所述多接入PDU会话参数用于指示所述用户设备请求建立多接入PDU会话，其中，该非接入层(NAS)消息可以为非接入层传输(NAS Transport)消息或服务请求消息。
其中，用户设备可以通过上述图4或图5所示实施例完成在第一通信网络和第二通信网络的多接入注册。当用户设备在第一通信网络与第二通信网络注册成功后，用户设备可以执行步骤601以请求建立多接入PDU会话。
一种可实现方式，用户设备可以通过上述图4或图5所示实施例完成在第一通信网络和第二通信网络的多接入注册。用户设备在第一通信网络和第二通信网络中的一个通信网络发起PDU会话建立流程，同现有流程。当PDU会话在第一通信网络和第二通信网络中的一个通信网络建立完成后，用户设备通过执行本实施例的步骤，在第一通信网络和第二通信网络中的另一个通信网络发起PDU会话建立流程，即增加另一个通信网络的接入技术到该PDU会话，从而建立多接入PDU会话。或者，用户设备确定已经建立的PDU会话处于激活态时，则用户设备在另一个通信网络通过本实施例的步骤建立多接入会话。上述接入网络设备即为第一通信网络和第二通信网络中的另一个通信网络的接入网设备。
具体的，用户设备向接入网设备发送非接入层传输(NAS Transport)消息，该非接入层传输(NAS Transport)消息也可以使用其他NAS消息替换。
一种可实现方式，非接入层传输(NAS Transport)消息或其他NAS消息中包括PDU会话建立请求或PDU会话更新消息，该PDU会话建立请求和PDU会话更新消息包括第二多接入指示信息和会话标识(PDU session ID)。其中，该PDU会话建立请求和PDU会话更新消息可以统称为会话管理NAS(Session Management NAS，SM NAS)消息。
另一种可实现方式，非接入层传输(NAS Transport)消息或其他NAS消息中包括第二多接入指示信息和会话标识。
其中，该第二多接入指示信息用于指示所述用户设备请求为所述会话标识对应的会话业务建立多接入PDU会话。第二多接入指示信息的具体实现形式可以为附加接入指示(additional access indication)或多接入指示(multi-access indication)等，本申请对此不做限制。该会话标识为用户设备已经在第一通信网络和第二通信网络中的一个通信网络建立的PDU会话的会话标识。以下实施例以PDU会话首先在第一通信网络建立成功后，用户设备在第二通信网络发起多接入会话建立流程为例进行举例说明。
可选的，用户设备可以判断第一通信网络与第二通信网络是否属于相同PLMN，当确定第一通信网络与第二通信网络属于相同PLMN时，用户设备执行上述步骤601，以发起多接入PDU会话建立流程。
可选的，用户设备可以判断是否已经在第一通信网络或第二通信网络建立PDU会话。当确定用户设备已经在第一通信网络或第二通信网络建立PDU会话时，用户设备执行上述步骤601，以发起多接入PDU会话建立流程。
可选的，用户设备可以判断第一通信网络与第二通信网络是否属于相同PLMN，和判断是否已经在第一通信网络或第二通信网络建立PDU会话。当所述第一通信网络和所述第二通信网络属于相同的PLMN，且用户设备已经在第一通信网络或第二通信网络建立PDU会话时，用户设备执行上述步骤601，以发起多接入PDU会话建立流程。
步骤602、接入网设备向AMF发送第一传输消息。AMF接收接入网设备发送的第一传输消息。
其中，该第一传输消息包括上述非接入层传输(NAS Transport)消息或其他NAS消息。该非接入层传输(NAS Transport)消息或其他NAS消息中包括的具体内容可以参见步骤601，此处不再赘述。
即用户设备通过接入网设备的无线承载将非接入层传输(NAS Transport)消息或其他NAS消息发送给AMF。
步骤603、所述AMF根据会话标识查找PDU会话对应的SMF标识。
步骤604、所述AMF向所述SMF标识对应的SMF发送第二传输消息。SMF接收AMF发送的第二传输消息。
其中，所述第二传输消息具体可以是N11接口传输消息，Nsmf_PDU Session_Update SMContext消息(PDU会话SM上下文更新消息)，也可以是其他消息，本发明实施例对此不作限制。
一种可实现方式，所述第二传输消息包括用户设备永久标识和PDU会话建立请求消息。所述PDU会话建立请求消息包括会话标识(PDU session ID)和所述第二多接入指示信息，所述第二多接入指示信息用于指示所述用户设备请求为所述会话标识对应的会话业务建立多接入PDU会话。
另一种可实现方式，第二传输消息包括用户设备永久标识、第二多接入指示信息与会话标识(PDU session ID)。
即AMF通过第二传输消息将第二多接入指示信息与会话标识发送给SMF。
上述第二传输消息还可以包括接入类型信息。
可选的，AMF根据第二多接入指示信息、UE签约信息、UE策略信息、或UE多接入注册状态中的至少一个判断是否允许为上述PDU会话增加另一个通信网络的接入技术或者判断是否允许上述PDU会话在当前接入技术接入。举例而言，当UE为多接入注册状态时或当UE在同一PLMN为多接入注册状态时，AMF允许为上述PDU会话增加另一个通信网络的接入技术或允许上述PDU会话在当前接入技术接入。或者，基于UE签约信息或策略信息，当PDU会话对应的DN网络(Data Network)允许另一个通信网络的接入技术或允许多接入技术接入时，AMF允许为上述PDU会话增加另一个通信网络的接入技术或允许上述PDU会话在当前接入技术接入。或者，当AMF收到第二多接入指示信息时，AMF允许为上述PDU会话增加另一个通信网络的接入技术或允许上述PDU会话在当前接入技术接入。
本实施例以及图14所示实施例所涉及的“当前接入技术”具体指用户设备向PDU会话增加一个通信网络的接入技术，从而建立多接入PDU会话，
当AMF允许为上述PDU会话建立多接入连接或允许上述PDU会话在当前接入技术接入时，则AMF通过第二传输消息向SMF发送的第二多接入指示信息，或AMF生成第三多接入 指示信息，通过第二传输消息向SMF发送给该第三多接入指示信息。
其中，所述第三多接入指示信息包括多接入注册指示、多接入允许指示、多接入状态指示、和多接入会话指示中的任意一个；其中，所述多接入注册指示用于指示所述用户设备在所述第一通信网络和第二通信网络多接入注册，所述多接入允许指示用于指示允许所述用户设备同时接入所述第一通信网络与所述第二通信网络，所述多接入状态指示用于指示所述用户设备同时接入所述第一通信网络与所述第二通信网络的状态。
步骤605、SMF基于所述用户设备的永久标识获取所述用户设备的签约信息。
其中，SMF可以从UDM发送获取用户设备的签约信息。
具体的，SMF向UDM发送第六多接入指示信息与会话标识。可选的，SMF还发送接入类型(Access type)信息或无线接入类型(RAT type)信息中的至少一个给UDM。上述第六多接入指示信息用于指示上述PDU会话为多接入会话。上述Access type信息或RAT type信息用于指示第二通信网络的接入技术。UDM发送第二通信网络的接入技术对应的签约信息给SMF，如用户设备在第二通信网络的接入技术的计费策略签约数据给SMF。
步骤606、SMF基于会话标识查找SMF与PCF之间的PDU会话对应的会话连接，SMF在会话连接上向PCF发送第三传输消息。
一种可实现方式，该第三传输消息包括第七多接入指示信息、会话标识和第二通信网络的接入类型信息，上述第七多接入指示信息指示所述PDU会话为多接入PDU会话。
另一种可实现方式，该第三传输消息包括会话标识、第一通信网络的接入类型信息与第二通信网络的接入类型信息。
步骤607、PCF存储会话标识与第一通信网络的接入类型信息及第二通信网络的接入类型信息的绑定关系。
步骤608、PCF向SMF发送PDU会话的策略信息。SMF接收PCF发送的PDU会话的策略信息。
具体的，该PDU会话的策略信息可以包括分流策略信息。其中，该分流策略信息可以包括数据流描述信息和相应策略，举例而言，该分流策略信息可以包括数据流描述信息和与数据流描述信息对应的接入类型信息。
步骤609、SMF根据所述签约信息中的会话业务签约数据或策略信息或第二多接入指示信息或第三多接入指示信息中的至少一个判断所述会话标识对应的会话业务是否允许建立多接入PDU会话或允许当前接入技术，若是，则执行步骤610，若否，则执行步骤611。
一种可实现方式，SMF基于签约信息中的会话业务签约数据或策略信息，当PDU会话对应的DN网络(Data Network)允许第二通信网络的接入技术或允许多接入技术接入时，允许为上述PDU会话增加第二通信网络的接入技术。
另一种可实现方式，SMF根据第二多接入指示信息或第三多接入指示信息，允许为上述PDU会话增加第二通信网络的接入技术。
步骤610、SMF向UPF发送N4会话新建或更新请求消息。UPF接收SMF发送的N4会话新建或更新请求消息。
其中，该N4会话新建或更新请求消息中包括第四多接入指示信息或接入类型信息。
具体的，SMF基于会话标识查找上述PDU会话对应的N4会话连接，并在上述N4会话 连接上发送N4会话新建或更新请求(N4Session Establishment/Modification request)消息。上述第四多接入指示信息可以与第二多接入指示信息为相同参数形式，如additional access indication，或者不同的参数形式。上述接入类型(access type)信息指示第二通信网络的接入技术，如3GPP接入，non3GPP接入，可信WLAN接入，非可信WLAN接入技术、5G RAN接入，固网接入技术、LTE接入技术等。
可选的，当有多个UPF为该PDU会话服务时，即当上述PDU会话隧道上存在多个UPF时，如包括上行分类UPF(Uplink Classifier UPF，ULCL UPF)或分支点UPF(Branching point UPF)或锚点UPF(Anchor UPF)时，则SMF选择N3接口UPF或ULCL UPF(Uplink Classifier UPF)或Branching point UPF或Anchor UPF发送上述PDU会话新建或更新请求消息，且包含第四多接入指示信息或接入类型信息，在被选定的上述UPF上增加第二通信网络的接入网隧道信息。
所述PDU会话新建或更新请求消息或第四多接入指示信息或接入类型信息用于指示所述UPF为所述会话业务新建与第二通信网络的接入网侧对应的隧道标识，如F-TEID(IP address-Tunnel Endpoint Identifier)。即UPF针对上述PDU会话同时存储第一通信网络的接入网侧隧道标识与第二通信网络的接入网侧隧道标识。
此外，可选的，SMF还可以发送接入类型(access type)信息与接入网侧隧道标识的对应关系给UPF。UPF存储上述接入类型信息与接入侧隧道标识的绑定关系。或者，SMF发送数据包的转发规则(packet forward rules)给UPF，数据包的转发规则中包括数据流描述信息(如数据包五元组信息中的至少一个)与接入类型信息的对应关系。UPF基于数据流描述信息匹配数据包，基于接入类型信息查找对应的接入侧隧道标识，将匹配的数据包发送到相应的接入网侧隧道。
UPF根据该PDU会话新建或更新请求消息或第四多接入指示信息和/或接入类型信息为所述会话业务分配与第二通信网络的接入网侧对应的UPF侧隧道标识，并将该隧道标识通知该第二通信网络的接入网设备，从而建立第二通信网络的接入网设备与该UPF之间的隧道，实现多接入会话建立。
并且，UPF基于该PDU会话新建或更新请求消息或第四多接入指示信息或接入类型信息，为PDU会话存储第一通信网络的接入网侧隧道标识与第二通信网络的接入网侧隧道标识。
具体的，一种可实现方式，UPF接收SMF发送的第四多接入指示信息。UPF根据该第四多接入指示信息为所述会话业务存储与第二通信网络的接入网侧隧道标识，同时UPF保留所述会话业务在第一通信网络接入时存储的与第一通信网络的接入网侧隧道标识。UPF还可以接收SMF发送的接入类型信息与所述第一通信网络的接入网侧隧道标识或所述第二通信网络的接入网侧隧道标识的对应关系，UPF存储接入类型信息与所述第一通信网络的接入网侧隧道标识或所述第二通信网络的接入网侧隧道标识的对应关系。
在数据转发过程中，所述UPF还可以接收所述SMF发送的数据包的转发规则，所述数据包的转发规则包括数据流描述信息和接入类型信息的对应关系，所述UPF存储数据流描述信息与接入类型信息的对应关系；所述UPF接收数据包，根据所述数据流描述信息与接入类型信息的对应关系确定所述数据包对应的接入类型信息；所述UPF根据所述数据包对 应的接入类型信息、所述接入类型信息与所述第一通信网络的接入网侧隧道标识或所述第二通信网络的接入网侧隧道标识的对应关系，将所述数据包发送给与所述数据包对应的接入类型信息对应的接入网侧隧道。
另一种可实现方式，UPF接收SMF发送的接入类型信息，UPF根据该接入类型信息为所述会话业务存储与第二通信网络的接入网侧隧道标识。具体的，UPF判断是否已经存储了上述接入类型信息对应的接入网侧隧道标识。如果没有，则UPF存储上述接入网侧隧道标识。否则，UPF基于接入类型查找之前存储的接入侧隧道标识，并用上述接入网侧隧道标识替换原有接入网侧隧道标识。UPF基于所述接入类型信息为PDU会话存储第一通信网络的接入网侧隧道标识和其对应的接入类型信息、第二通信网络的接入网侧隧道标识和其对应的接入类型信息，即存储有隧道标识和接入类型信息的对应关系。
在数据转发过程中，所述UPF还可以接收所述SMF发送的数据包的转发规则，所述数据包的转发规则包括数据流描述信息和接入类型信息的对应关系，所述UPF存储数据流描述信息与接入类型信息的对应关系；所述UPF接收数据包，根据所述数据流描述信息与接入类型信息的对应关系确定所述数据包对应的接入类型信息；所述UPF根据所述数据包的接入类型信息、所述UPF存储的所述第一通信网络的接入网侧隧道标识和其对应的接入类型信息、第二通信网络的接入网侧隧道标识和其对应的接入类型信息，将所述数据包发送给与所述数据包对应的接入类型信息对应的接入网侧隧道。
步骤611、如果不允许建立多接入会话，则SMF向UPF发送N4会话更新或新建请求消息，所述N4会话更新或新建请求消息用于指示所述UPF更新所述会话业务的接入网侧隧道标识。UPF接收SMF发送的N4会话更新或新建请求消息。
具体的，所述更新所述会话业务的接入网侧隧道标识包括存储与第二通信网络的接入网侧对应隧道标识，并删除或更新与第一通信网络的接入网络侧对应的隧道标识。
步骤611与步骤610分别适用于不同场景，不会同时触发。
步骤612、UPF向SMF发送连接建立回复消息。SMF接收UPF发送的连接建立回复消息。
步骤613、SMF向AMF发送信息传输消息或Namf_Communication_N1N2MessageTransfer消息或Nsmf_PDUSession_UpdateSMContext Response(PDU会话SM上下文更新回复消息)。
具体的，在多接入会话建立成功后，SMF发送上述消息，该消息可以包括接入类型(access type)信息，与第五多接入指示信息。上述第五多接入指示信息的实现形式可以与第二多接入指示信息一样为additional access indication，或者不同的参数形式。第五多接入指示信息指示AMF为此PDU新增另一接入技术，上述接入技术由access type指示。或者，上述消息中含有additional access参数，指示新增的另一接入技术。additional access参数值为3GPP Access，non3GPP access，5G RAN，固网接入，或WLAN接入等。
步骤614、AMF将上述PDU会话标记为多接入PDU会话。或者，AMF存储会话标识与第一通信网络的接入类型信息和第二通信网络的接入类型信息的绑定关系。
本实施例，在实现用户设备在第一通信网络和第二通信网络的多接入注册的基础上，进一步可以实现多接入会话建立。
图14为本发明实施例另一种多接入场景中的连接处理方法的流程图，本实施例对图 13所示实施例的多接入PDU会话参数为服务请求消息，所述服务请求消息包括多接入PDU会话标识列表，进行具体解释说明，如图14所示，本实施例的方法可以包括：
步骤701、用户设备向接入网设备发送服务请求消息(Service Request)。接入网设备接收用户设备发送的服务请求消息。
其中，用户设备可以通过上述图4或图5所示实施例完成在第一通信网络和第二通信网络的多接入注册。当用户设备在第一通信网络与第二通信网络注册成功后，用户设备在第一通信网络和第二通信网络中的一个通信网络发起PDU会话建立流程，同现有流程。当PDU会话在第一通信网络和第二通信网络中的一个通信网络建立完成后，且用户设备确定第一通信网络与第二通信网络属于相同PLMN时，用户设备在第一通信网络和第二通信网络中的另一个通信网络通过本实施例的步骤建立多接入会话。或者，用户设备确定已经建立的PDU会话处于非激活态时，则用户设备在另一个通信网络通过本实施例的步骤建立多接入会话。具体的，用户设备在另一通信网络发送服务请求消息(Service Request)给AMF。其中，服务请求消息包括多接入PDU会话标识列表，上述列表中包括至少一个已经建立的PDU会话的会话标识。该列表用于指示UE请求为列表中的PDU会话增加另一接入技术，即将PDU会话变成多接入PDU会话。
步骤702、接入网设备向AMF发送第一传输消息。AMF接收接入网设备发送的第一传输消息。
该第一传输消息包括服务请求消息。
步骤703、AMF获取多接入PDU会话标识列表，AMF判断上述列表中的PDU会话是否可以支持多接入或判断上述PDU会话是否允许在当前接入技术接入。
具体的，AMF基于UE签约信息、或UE策略信息、或UE多接入注册状态中的至少一个判断是否允许为上述PDU连接增加另一接入技术，或是否允许上述PDU会话在当前接入技术接入。例如，当UE为多接入注册状态时、或当UE在同一PLMN为多接入注册状态时，AMF允许为上述PDU会话增加另一接入技术，或允许PDU会话在当前接入技术接入。或者，基于UE签约信息或策略信息，当PDU会话对应的DN网络(Data Network)允许当前接入技术、或允许多接入技术接入时，AMF允许为上述PDU会话增加另一接入技术或允许PDU会话在当前接入技术接入。或者，当AMF收到多接入PDU会话标识列表，AMF允许为列表中的PDU会话增加另一接入技术，或允许PDU会话在当前接入技术接入。
对于允许的PDU会话，AMF基于会话标识查找PDU会话对应的SMF标识，并发送第二传输消息给上述SMF。
具体的，AMF基于多接入PDU会话标识列表中的会话标识查找至少一个PDU会话对应的SMF标识，当多接入PDU会话标识列表存在多个PDU会话，且多个PDU会话对应不同的SMF标识，即对应不同的SMF，则AMF可以分别向不同的SMF发送第二传输消息，每个第二传输消息中包括会话标识和第三多接入指示信息，其中该会话标识为SMF上进行处理的PDU会话的会话标识，即多接入PDU会话标识列表中含有的PDU会话标识。每个SMF基于会话标识和第三多接入指示信息为PDU会话建立多接入PDU会话。
其中，每个SMF和UDM、PCF和UPF在建立多接入PDU会话过程所执行的后续操作可以参见上述步骤605到步骤614，此处不再赘述。
本实施例，在实现用户设备在第一通信网络和第二通信网络的多接入注册的基础上，进一步可以实现多接入会话建立。尤其，当已经建立的PDU会话在第一通信网络或第二通信网络处于非激活态时，可以基于上述流程在另一侧通信网络建立多接入PDU会话。
本发明实施例还提供一种用户设备，该用户设备采用与图3所示AMF相同的结构。
在本发明实施例中，通过调用存储器存储的程序或指令，用户设备的处理器用于执行上述图13或图14方法实施例的用户设备的步骤，从而实现用户设备在第一通信网络和第二通信网络的多接入注册的基础上，进一步可以实现多接入会话建立，具体实现过程可以参见上述各方法实施例。
本发明实施例还提供一种UPF，该UPF采用与图3所示AMF相同的结构。
在本发明实施例中，通过调用存储器存储的程序或指令，UPF的处理器用于执行上述图13或图14方法实施例的UPF的步骤，从而实现用户设备在第一通信网络和第二通信网络的多接入注册的基础上，进一步可以实现多接入会话建立，具体实现过程可以参见上述各方法实施例。
本发明实施例还提供一种SMF，该SMF采用与图3所示AMF相同的结构。
在本发明实施例中，通过调用存储器存储的程序或指令，SMF的处理器用于执行上述图13或图14方法实施例的SMF的步骤，从而实现用户设备在第一通信网络和第二通信网络的多接入注册的基础上，进一步可以实现多接入会话建立，具体实现过程可以参见上述各方法实施例。
图15为本发明实施例的另一种用户设备的结构示意图，如图15所示，本实施例的装置可以包括：注册模块41、处理模块42和发送模块43，其中，注册模块41，用于在第一通信网络和第二通信网络发起注册；处理模块42，用于在注册成功之后，通过发送模块43向核心网网络设备发送非接入层消息，所述非接入层消息包括多接入PDU会话参数，其中，所述多接入PDU会话参数用于指示所述用户设备请求建立多接入PDU会话。
可选的，所述多接入PDU会话参数包括第二多接入指示信息和会话标识，其中，所述第二多接入指示信息用于指示所述用户设备请求为所述会话标识对应的会话建立多接入PDU会话；或者，所述多接入PDU会话参数包括多接入PDU会话标识列表，所述多接入PDU会话标识列表包括至少一个会话标识，所述多接入PDU会话标识列表用于指示所述用户设备请求为所述至少一个会话标识对应的会话分别建立多接入PDU会话。
可选的，所述处理模块42还用于在向核心网功能实体发送非接入层消息之前，判断所述第一通信网络和所述第二通信网络是否属于相同的PLMN；和/或，判断已经在第一通信网络或第二通信网络建立PDU会话。
本实施例的装置，可以用于执行上述方法实施例的技术方案，其实现原理和技术效果类似，此处不再赘述。
图16为本发明实施例的另一种用户面功能实体的结构示意图，如图16所示，本实施例的装置可以包括：接收模块51和处理模块52，其中，接收模块51，用于接收会话管理功能实体SMF发送的第四多接入指示信息；处理模块52，用于基于所述第四多接入指示信息为PDU会话存储第一通信网络的接入网侧隧道标识与第二通信网络的接入网侧隧道标识。
可选的，所述接收模块51还用于：接收所述SMF发送的接入类型信息与所述第一通 信网络的接入网侧隧道标识或所述第二通信网络的接入网侧隧道标识的对应关系，所述处理模块52还用于存储接入类型信息与接入网侧隧道标识的对应关系，所述接入网侧隧道标识包括所述第一通信网络的接入网侧隧道标识或所述第二通信网络的接入网侧隧道标识。
可选的，所述接收模块51还用于：接收所述SMF发送的数据包的转发规则，所述数据包的转发规则包括数据流描述信息和接入类型信息的对应关系，所述处理模块52存储数据流描述信息与接入类型信息的对应关系；所述接收模块51还用于接收数据包，所述处理模块52还用于根据所述数据流描述信息与接入类型信息的对应关系确定所述数据包对应的接入类型信息；根据所述数据包对应的接入类型信息、以及所述接入类型信息与接入网侧隧道标识的对应关系，将所述数据包发送给所述接入类型信息对应的接入网侧隧道。
本实施例的装置，可以用于执行上述方法实施例的技术方案，其实现原理和技术效果类似，此处不再赘述。
本申请实施例还提供另一种用户面功能实体，其结构可以与图20相同，其中，接收模块，用于接收会话管理功能实体SMF发送的接入类型信息；处理模块，用于基于所述接入类型信息为PDU会话存储接入网侧隧道标识和所述接入类型信息对应关系，所述接入网侧隧道标识包括所述第一通信网络的接入网侧隧道标识或所述第二通信网络的接入网侧隧道标识。
可选的，所述接收模块还用于：接收所述SMF发送的数据包的转发规则，所述数据包的转发规则包括数据流描述信息和接入类型信息的对应关系，所述处理模块还用于存储数据流描述信息与接入类型信息的对应关系；所述接收模块还用于接收数据包，所述处理模块还用于根据所述数据流描述信息与接入类型信息的对应关系确定所述数据包对应的接入类型信息；根据所述数据包对应的接入类型信息、所述UPF存储的所述接入网侧隧道标识和所述接入类型信息的对应关系，将所述数据包发送给所述接入类型信息对应的接入网侧隧道。
本实施例的装置，可以用于执行上述方法实施例的技术方案，其实现原理和技术效果类似，此处不再赘述。
图17为本发明实施例的另一种会话管理功能实体的结构示意图，如图17所示，本实施例的装置可以包括：接收模块61和处理模块62，其中，接收模块61，用于接收移动性管理功能实体发送的第二传输消息，所述第二传输消息包括多接入PDU会话参数，所述多接入PDU会话参数包括PDU会话建立请求消息，所述PDU会话建立请求消息中包括第二多接入指示信息和会话标识，或者，所述多接入PDU会话参数包括第三多接入指示信息和所述会话标识；处理模块62，用于根据所述多接入PDU会话参数为所述用户设备建立多接入PDU会话；其中，所述第二多接入指示信息用于指示所述用户设备请求为所述会话标识对应的会话业务建立多接入PDU会话，所述第三多接入指示信息用于指示允许为所述会话标识对应的会话业务建立多接入PDU会话。
可选的，所述会话管理功能实体根据所述多接入PDU会话参数为所述用户设备建立多接入PDU会话之前，所述处理模块62还用于获取所述用户设备的签约信息；根据所述签约信息或策略信息或第二多接入指示信息或第三多接入指示信息中的至少一个允许为所 述会话标识对应的会话业务建立多接入PDU会话。
可选的，所述会话管理功能实体还包括发送模块63，所述发送模块63用于向用户面功能实体UPF发送会话新建或更新消息，所述会话新建或更新消息用于指示所述UPF为会话业务新建与第二通信网络的接入网侧对应的隧道标识。
可选的，当所述处理模块根据所述签约信息中的会话业务签约数据确定会话标识对应的会话业务不允许建立多接入PDU会话，所述发送模块还用于：向UPF发送会话新建或更新消息，所述会话更新或新建消息用于指示所述UPF更新所述会话业务的接入网侧隧道标识，所述更新所述会话业务的接入网侧隧道标识包括存储与第二通信网络的接入网侧对应隧道标识，并删除或更新与第一通信网络的接入网络侧对应的隧道标识。
可选的，所述处理模块还用于基于所述会话标识查找PDU会话对应的UPF；所述发送模块还用于：通过所述处理模块选择所述UPF中的N3接口UPF或上行分类UPF或分支点UPF或锚点UPF发送所述会话新建或更新消息。
可选的，所述发送模块还用于：向UPF发送第四多接入指示信息和/或接入类型信息，所述第四多接入指示信息和/或接入类型信息用于指示存储第一通信网络与第二通信网络的接入网侧隧道标识。
可选的，所述发送模块还用于：所述会话管理功能实体向UPF发送接入类型信息与隧道标识的对应关系；或者，所述会话管理功能实体向所述UPF发送数据包的转发规则；或者，所述所述会话管理功能实体向所述UPF发送接入类型信息与隧道标识对应关系、以及数据包的转发规则；其中，所述数据包的转发规则包括数据流描述信息和接入类型信息的对应关系。
可选的，所述发送模块还用于：向所述移动性管理功能实体发送第五多接入指示信息和会话标识，所述第五多接入指示信息用于指示所述会话标识对应的会话业务为多接入PDU会话。
可选的，所述发送模块还用于：向PCF发送第七多接入指示信息、会话标识和接入类型信息，所述第七多接入指示信息用于指示所述会话标识对应的PDU会话为多接入PDU会话；或者，向所述PCF发送第四传输消息，所述第四传输消息包括会话标识、第一通信网络的接入类型信息与第二通信网络的接入类型信息，所述第四传输消息用于指示所述PCF存储所述会话标识与第一通信网络的接入类型信息及第二通信网络的接入类型信息的绑定关系。
本实施例的装置，可以用于执行上述方法实施例的技术方案，其实现原理和技术效果类似，此处不再赘述。
上述各个装置与其他通信网元的交互过程可以具体参见上述方法实施例的解释说明，其有益效果可以参见上述方法实施例所带来的有益效果，在此不再赘述。
当本发明实施例的多接入场景中的连接处理方法的至少一部分功能通过软件实现时，本发明实施例还提供一种计算机可读存储介质，计算机可读存储介质用于储存为上述移动性管理功能实体所用的计算机软件指令，当其在计算机上运行时，使得计算机可以执行上述方法实施例中各种可能的多接入场景中的连接处理方法。在计算机上加载和执行所述计算机执行指令时，可全部或部分地产生按照本发明实施例所述的流程或功能。所述计算机 指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，所述传输可以通过无线(例如蜂窝通信、红外、短距离无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质，(例如，软盘、硬盘、磁带)、光介质(例如，DVD)、或者半导体介质(例如固态硬盘Solid State Disk(SSD))等。
当本发明实施例的多接入场景中的连接处理方法的至少一部分功能通过软件实现时，本发明实施例还提供一种计算机可读存储介质，计算机可读存储介质用于储存为上述会话管理功能实体所用的计算机软件指令，当其在计算机上运行时，使得计算机可以执行上述方法实施例中各种可能的多接入场景中的连接处理方法。在计算机上加载和执行所述计算机执行指令时，可全部或部分地产生按照本发明实施例所述的流程或功能。所述计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，所述传输可以通过无线(例如蜂窝通信、红外、短距离无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质，(例如，软盘、硬盘、磁带)、光介质(例如，DVD)、或者半导体介质(例如SSD)等。
此外，本发明实施例还提供一种包含指令的计算机程序产品，即软件产品，当其在计算机上运行时，使得计算机执行上述方法实施例中各种可能的多接入场景中的连接处理方法。其实现原理和技术效果类似，此处不再赘述。
最后应说明的是：以上各实施例仅用以说明本申请的技术方案，而非对其限制；尽管参照前述各实施例对本申请进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分或者全部技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本申请各实施例技术方案的范围。

Claims (43)

  1. 一种多接入场景中的连接处理方法，其特征在于，包括：
    移动性管理功能实体接收接入网设备发送的第一传输消息，所述第一传输消息包括注册请求消息，所述注册请求消息包括第一多接入指示信息和标识信息，所述标识信息用于获取用户设备的上下文信息和选择网络功能实体中的至少一个；
    所述移动性管理功能实体根据所述第一多接入指示信息和所述标识信息确定所述用户设备在第一通信网络已注册且发起了在第二通信网络的注册；
    所述移动性管理功能实体执行所述用户设备在所述第二通信网络的注册流程。
  2. 根据权利要求1所述的方法，其特征在于，所述标识信息包括所述用户设备的临时标识和网络切片选择辅助信息中至少一项。
  3. 根据权利要求1或2所述的方法，其特征在于，第一多接入指示信息包括多接入能力指示信息和位置区域注册指示信息中的至少一项。
  4. 根据权利要求1至3任一项所述的方法，其特征在于，所述移动性管理功能实体根据所述第一多接入指示信息和所述标识信息确定所述用户设备在第一通信网络已注册且发起了在第二通信网络的注册，包括：
    所述移动性管理功能实体根据所述标识信息获取所述用户设备的上下文信息；
    所述移动性管理功能实体根据所述用户设备的上下文信息确定所述用户设备在第一通信网络已注册；
    所述移动性管理功能实体根据所述第一多接入指示信息确定所述用户设备发起了在所述第二通信网络的注册。
  5. 根据权利要求1至3任一项所述的方法，其特征在于，所述第一传输消息还包括接入类型指示信息，所述移动性管理功能实体根据所述第一多接入指示信息和所述标识信息确定所述用户设备在第一通信网络已注册且发起了在第二通信网络的注册，包括：
    所述移动性管理功能实体根据所述接入类型指示信息、所述第一多接入指示信息和所述标识信息确定所述用户设备在第一通信网络已注册且发起了在第二通信网络的注册。
  6. 根据权利要求1至5任一项所述的方法，其特征在于，所述移动性管理功能实体执行所述用户设备在所述第二通信网络的注册流程之前，所述方法还包括：
    所述移动性管理功能实体根据所述用户设备的签约信息确定允许所述用户设备在所述第一通信网络和所述第二通信网络注册。
  7. 根据权利要求6所述的方法，其特征在于，所述方法还包括：
    若所述移动性管理功能实体根据所述用户设备的签约信息或本地配置信息确定不允许所述用户设备在所述第一通信网络和所述第二通信网络注册，则所述移动性管理功能实体执行所述用户设备在所述第二通信网络的注册流程，并发起所述用户设备在所述第一通信网络的去注册流程或删除所述用户设备在所述第一通信网络的注册状态。
  8. 根据权利要求1至7任一项所述的方法，其特征在于，所述注册请求消息还包括第二多接入指示信息，所述方法还包括：
    所述移动性管理功能实体向所述会话管理功能实体发送第二传输消息，所述第二传输消息包括用户设备的永久标识和PDU会话建立请求信息，所述PDU会话建立请求信息包括会话标识和第二多接入指示信息，所述第二多接入指示信息用于指示所述用户设备请求为所述会 话标识对应的会话业务建立多接入PDU会话。
  9. 根据权利要求8所述的方法，其特征在于，所述第二传输消息还包括第三多接入指示信息，所述第三多接入指示信息包括多接入注册指示、多接入允许指示、和多接入状态指示中的任意一个；
    其中，所述多接入注册指示用于指示所述用户设备在所述第一通信网络和第二通信网络多接入注册，所述多接入允许指示用于指示允许所述用户设备同时接入所述第一通信网络与所述第二通信网络，所述多接入状态指示用于指示所述用户设备同时接入所述第一通信网络与所述第二通信网络的状态。
  10. 一种多接入场景中的连接处理方法，其特征在于，包括：
    会话管理功能实体接收移动性管理功能实体发送的第二传输消息，所述第二传输消息包括用户设备的永久标识和PDU会话建立请求信息，所述PDU会话建立请求信息包括会话标识和第二多接入指示信息，所述第二多接入指示信息用于指示所述用户设备请求为所述会话标识对应的会话业务建立多接入PDU会话；
    所述会话管理功能实体根据所述PDU会话建立请求信息为所述会话标识对应的会话业务建立多接入会话。
  11. 根据权利要求10所述的方法，其特征在于，所述会话管理功能实体根据所述PDU会话建立请求信息为所述会话标识对应的会话业务建立多接入会话之前，所述方法还包括：
    所述会话管理功能实体基于所述用户设备的永久标识获取所述用户设备的签约信息；
    所述会话管理功能实体根据所述签约信息中的会话业务签约数据确定所述会话标识对应的会话业务允许建立多接入PDU会话。
  12. 根据权利要求10或11所述的方法，其特征在于，所述第二传输消息还包括第三多接入指示；
    所述会话管理功能实体根据所述第三多接入指示信息确定允许所述会话标识对应的会话业务建立多接入PDU会话。
  13. 根据权利要求10至12任一项所述的方法，其特征在于，所述方法还包括：
    所述会话管理功能实体向用户面功能实体UPF发起PDU会话新建或更新流程，所述PDU会话新建或更新流程包括所述会话管理功能实体发送PDU会话新建或更新请求消息，所述PDU会话新建或更新请求消息用于指示所述UPF为所述会话业务新建与第二通信网络的接入网侧对应的隧道标识。
  14. 根据权利要求11所述的方法，其特征在于，若所述会话管理功能实体根据所述签约信息中的会话业务签约数据确定所述会话标识对应的会话业务不允许建立多接入PDU会话，所述方法还包括：
    所述会话管理功能实体向UPF发起PDU会话更新或新建流程，所述PDU会话更新流程包括所述会话管理功能实体发送PDU会话更新或新建请求消息，所述PDU会话更新或新建请求消息用于指示所述UPF更新所述会话业务的接入网侧隧道标识，所述更新所述会话业务的接入网侧隧道标识包括存储与第二通信网络的接入网侧对应隧道标识，并删除或更新与第一通信网络的接入网络侧对应的隧道标识。
  15. 根据权利要求10至14任一项所述的方法，其特征在于，所述方法还包括：
    所述会话管理功能实体向用户面功能实体UPF发送接入类型信息与接入网侧隧道标识的对应关系；或者，
    所述会话管理功能实体向所述UPF发送接入类型信息与接入网侧隧道标识的对应关系、以及数据包的转发规则；
    其中，所述数据包的转发规则包括数据流描述信息和接入类型信息的对应关系。
  16. 根据权利要求10至15任一项所述的方法，其特征在于，所述方法还包括：
    所述会话管理功能实体向所述移动性管理功能实体发送第五多接入指示信息和所述会话标识，所述第五多接入指示信息用于指示所述会话标识对应的会话为多接入PDU会话。
  17. 根据权利要求10至16任一项所述的方法，其特征在于，所述方法还包括：
    所述会话管理功能实体向策略控制功能实体PCF发送第七多接入指示信息、所述会话标识和接入类型信息，所述第七多接入指示信息用于指示所述会话标识对应的PDU会话为多接入PDU会话；或者，
    所述会话管理功能实体向所述PCF发送第四传输消息，所述第四传输消息包括所述会话标识、第一通信网络的接入类型信息与第二通信网络的接入类型信息，所述第一通信网络的接入类型信息与第二通信网络的接入类型信息用于指示所述PCF存储所述会话标识与第一通信网络的接入类型信息及第二通信网络的接入类型信息的绑定关系。
  18. 一种多接入场景中的连接处理方法，其特征在于，包括：
    用户设备在第一通信网络注册成功且需要在第二通信网络注册时，所述用户设备向所述第二通信网络的接入网设备发送注册请求消息或参数，所述注册请求消息或参数中包括第一多接入指示信息和标识信息；
    其中，所述第一多接入指示信息用于网络侧接入与移动性管理功能实体移动性管理功能实体根据所述第一多接入指示信息和所述标识信息执行所述用户设备在所述第二通信网络的注册，所述标识信息用于选择网络功能实体和获取用户设备的上下文信息中的至少一个。
  19. 根据权利要求18所述的方法，其特征在于，所述注册请求消息或参数中还包括第二多接入指示信息，所述第二多接入指示信息用于所述用户设备在所述第二通信网络注册成功后，会话管理功能实体根据所述第二接入指示信息建立多接入会话。
  20. 一种移动性管理功能实体，其特征在于，包括：
    接收模块，用于接收接入网设备发送的第一传输消息，所述第一传输消息包括注册请求消息，所述注册请求消息包括第一多接入指示信息和标识信息，所述标识信息用于获取用户设备的上下文信息和选择网络功能实体中的至少一个；
    确定模块，用于根据所述第一多接入指示信息和所述标识信息确定所述用户设备在第一通信网络已注册且发起了在第二通信网络的注册；
    处理模块，用于执行所述用户设备在所述第二通信网络的注册流程。
  21. 根据权利要求20所述的移动性管理功能实体，其特征在于，所述确定模块，具体用于：
    根据所述标识信息获取所述用户设备的上下文信息；
    根据所述用户设备的上下文信息确定所述用户设备在第一通信网络已注册；
    根据所述第一多接入指示信息确定所述用户设备发起了在所述第二通信网络的注册。
  22. 根据权利要求20所述的移动性管理功能实体，其特征在于，所述第一传输消息还包括接入类型指示信息，所述确定模块，具体用于：
    根据所述接入类型指示信息、所述第一多接入指示信息和所述标识信息确定所述用户设备在第一通信网络已注册且发起了在第二通信网络的注册。
  23. 根据权利要求20至22任一项所述的移动性管理功能实体，其特征在于，所述移动性管理功能实体还包括判断模块，所述判断模块用于在所述处理模块执行所述用户设备在所述第二通信网络的注册流程之前，根据所述用户设备的签约信息确定允许所述用户设备在所述第一通信网络和所述第二通信网络注册。
  24. 根据权利要求23所述的移动性管理功能实体，其特征在于，所述判断模块还用于：
    若根据所述用户设备的签约信息或本地配置信息确定不允许所述用户设备在所述第一通信网络和所述第二通信网络注册，则所述处理模块执行所述用户设备在所述第二通信网络的注册流程，并发起所述用户设备在所述第一通信网络的去注册流程或删除所述用户设备在所述第一通信网络的注册状态。
  25. 根据权利要求20至24任一项所述的移动性管理功能实体，其特征在于，所述注册请求消息还包括第二多接入指示信息，所述移动性管理功能实体还包括：发送模块；
    所述发送模块，用于向所述会话管理功能实体发送第二传输消息，所述第二传输消息包括用户设备的永久标识和PDU会话建立请求信息，所述PDU会话建立请求信息包括会话标识和第二多接入指示信息，所述第二多接入指示信息用于指示所述用户设备请求为所述会话标识对应的会话业务建立多接入PDU会话。
  26. 一种会话管理功能实体，其特征在于，包括：
    接收模块，用于接收移动性管理功能实体发送的第二传输消息，所述第二传输消息包括用户设备的永久标识和PDU会话建立请求信息，所述PDU会话建立请求信息包括会话标识和第二多接入指示信息，所述第二多接入指示信息用于指示所述用户设备请求为所述会话标识对应的会话业务建立多接入PDU会话；
    处理模块，用于根据所述PDU会话建立请求信息为所述会话标识对应的会话业务建立多接入会话。
  27. 根据权利要求26所述的会话管理功能实体，其特征在于，所述会话管理功能实体还包括确定模块，所述确定模块用于在根据所述PDU会话建立请求信息为所述会话标识对应的会话业务建立多接入会话之前，基于所述用户设备的永久标识获取所述用户设备的签约信息；
    根据所述签约信息中的会话业务签约数据确定所述会话标识对应的会话业务允许建立多接入PDU会话。
  28. 根据权利要求26或27所述的会话管理功能实体，其特征在于，所述第二传输消息还包括第三多接入指示；
    所述处理模块还用于根据所述第三多接入指示信息确定允许所述会话标识对应的会话业务建立多接入PDU会话。
  29. 根据权利要求26至28任一项所述的会话管理功能实体，其特征在于，所述会话管理功能实体还包括：发送模块；
    所述发送模块用于向用户面功能实体UPF发起PDU会话新建或更新流程，所述PDU会话新建或更新流程包括发送PDU会话新建或更新请求消息，所述PDU会话新建或更新请求消息用于指示所述UPF为所述会话业务新建与第二通信网络的接入网侧对应的隧道标识。
  30. 根据权利要求29所述的会话管理功能实体，其特征在于，若所述确定模块根据所述签约信息中的会话业务签约数据确定所述会话标识对应的会话业务不允许建立多接入PDU会话，所述发送模块还用于：
    向UPF发起PDU会话更新或新建流程，所述PDU会话更新流程包括发送PDU会话更新或 新建请求消息，所述PDU会话更新或新建请求消息用于指示所述UPF更新所述会话业务的接入网侧隧道标识，所述更新所述会话业务的接入网侧隧道标识包括存储与第二通信网络的接入网侧对应隧道标识，并删除或更新与第一通信网络的接入网络侧对应的隧道标识。
  31. 一种用户设备，其特征在于，包括：
    发送模块和处理模块；
    所述处理模块用于在第一通信网络注册成功且需要在第二通信网络注册时，通过所述发送模块向所述第二通信网络的接入网设备发送注册请求消息或参数，所述注册请求消息或参数中包括第一多接入指示信息和标识信息；
    其中，所述第一多接入指示信息用于网络侧接入与移动性管理功能实体移动性管理功能实体根据所述第一多接入指示信息和所述标识信息执行所述用户设备在所述第二通信网络的注册，所述标识信息用于选择网络功能实体和获取用户设备的上下文信息中的至少一个。
  32. 根据权利要求31所述的用户设备，其特征在于，所述注册请求消息或参数中还包括第二多接入指示信息，所述第二多接入指示信息用于所述用户设备在所述第二通信网络注册成功后，会话管理功能实体根据所述第二接入指示信息建立多接入会话。
  33. 一种通信系统，其特征在于，包括如权利要求20至25任一项所述的移动性管理功能实体、以及如权利要求26至30任一项所述的会话管理功能实体。
  34. 一种多接入场景中的连接处理方法，其特征在于，包括：
    用户设备在第一通信网络和第二通信网络发起注册；
    在注册成功之后，所述用户设备向核心网网络设备发送非接入层消息，所述非接入层消息包括多接入PDU会话参数，其中，所述多接入PDU会话参数用于指示所述用户设备请求建立多接入PDU会话。
  35. 根据权利要求34所述的方法，其特征在于，所述多接入PDU会话参数包括第二多接入指示信息和会话标识，其中，所述第二多接入指示信息用于指示所述用户设备请求为所述会话标识对应的会话建立多接入PDU会话；或者，
    所述多接入PDU会话参数包括多接入PDU会话标识列表，所述多接入PDU会话标识列表包括至少一个会话标识，所述多接入PDU会话标识列表用于指示所述用户设备请求为所述至少一个会话标识对应的会话分别建立多接入PDU会话。
  36. 根据权利要求34或35所述的方法，其特征在于，所述用户设备向核心网功能实体发送非接入层消息之前，所述方法还包括：
    所述用户设备判断所述第一通信网络和所述第二通信网络是否属于相同的PLMN；和/或，用户设备判断已经在第一通信网络或第二通信网络建立PDU会话。
  37. 一种用户设备，其特征在于，包括：
    注册模块，用于在第一通信网络和第二通信网络发起注册；
    处理模块，用于在注册成功之后，通过发送模块向核心网网络设备发送非接入层消息，所述非接入层消息包括多接入PDU会话参数，其中，所述多接入PDU会话参数用于指示所述用户设备请求建立多接入PDU会话。
  38. 根据权利要求37所述的用户设备，其特征在于，所述处理模块还用于在向核心网功能实体发送非接入层消息之前，判断所述第一通信网络和所述第二通信网络是否属于相同的PLMN；和/或，判断已经在第一通信网络或第二通信网络建立PDU会话。
  39. 一种用户面功能实体，其特征在于，包括：
    接收模块，用于接收会话管理功能实体SMF发送的第四多接入指示信息；
    处理模块，用于基于所述第四多接入指示信息为PDU会话存储第一通信网络的接入网侧隧道标识与第二通信网络的接入网侧隧道标识。
  40. 根据权利要求39所述的用户面功能实体，其特征在于，所述接收模块还用于：接收所述SMF发送的接入类型信息与所述第一通信网络的接入网侧隧道标识或所述第二通信网络的接入网侧隧道标识的对应关系，所述处理模块还用于存储接入类型信息与接入网侧隧道标识的对应关系，所述接入网侧隧道标识包括所述第一通信网络的接入网侧隧道标识或所述第二通信网络的接入网侧隧道标识。
  41. 根据权利要求40所述的用户面功能实体，其特征在于，所述接收模块还用于：接收所述SMF发送的数据包的转发规则，所述数据包的转发规则包括数据流描述信息和接入类型信息的对应关系，所述处理模块存储数据流描述信息与接入类型信息的对应关系；所述接收模块还用于接收数据包，所述处理模块还用于根据所述数据流描述信息与接入类型信息的对应关系确定所述数据包对应的接入类型信息；根据所述数据包对应的接入类型信息、以及所述接入类型信息与接入网侧隧道标识的对应关系，将所述数据包发送给所述接入类型信息对应的接入网侧隧道。
  42. 一种用户面功能实体，其特征在于，包括：
    接收模块，用于接收会话管理功能实体SMF发送的接入类型信息；
    处理模块，用于基于所述接入类型信息为PDU会话存储接入网侧隧道标识和所述接入类型信息对应关系，所述接入网侧隧道标识包括所述第一通信网络的接入网侧隧道标识或所述第二通信网络的接入网侧隧道标识。
  43. 根据权利要求42所述的用户面功能实体，其特征在于，所述接收模块还用于：接收所述SMF发送的数据包的转发规则，所述数据包的转发规则包括数据流描述信息和接入类型信息的对应关系，所述处理模块还用于存储数据流描述信息与接入类型信息的对应关系；
    所述接收模块还用于接收数据包，所述处理模块还用于根据所述数据流描述信息与接入类型信息的对应关系确定所述数据包对应的接入类型信息；根据所述数据包对应的接入类型信息、所述UPF存储的所述接入网侧隧道标识和所述接入类型信息的对应关系，将所述数据包发送给所述接入类型信息对应的接入网侧隧道。
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