WO2017214850A1 - 一种用户上下文获取、查找方法和相关设备 - Google Patents

一种用户上下文获取、查找方法和相关设备 Download PDF

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Publication number
WO2017214850A1
WO2017214850A1 PCT/CN2016/085683 CN2016085683W WO2017214850A1 WO 2017214850 A1 WO2017214850 A1 WO 2017214850A1 CN 2016085683 W CN2016085683 W CN 2016085683W WO 2017214850 A1 WO2017214850 A1 WO 2017214850A1
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WIPO (PCT)
Prior art keywords
network element
control plane
plane network
identifier
user
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PCT/CN2016/085683
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English (en)
French (fr)
Inventor
李岩
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华为技术有限公司
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Priority to PCT/CN2016/085683 priority Critical patent/WO2017214850A1/zh
Publication of WO2017214850A1 publication Critical patent/WO2017214850A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/0005Control or signalling for completing the hand-off
    • H04W36/0011Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0033Control or signalling for completing the hand-off for data sessions of end-to-end connection with transfer of context information
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W76/00Connection management
    • H04W76/20Manipulation of established connections

Definitions

  • the embodiments of the present invention relate to the field of communications, and in particular, to a user context acquisition, a search method, and related devices.
  • EPC Evolved Packet Core
  • EPC Evolved Packet Core
  • PDN Packet Data Network
  • the service gateway includes a control plane serving gateway 107 and a user plane serving gateway 108
  • the packet data gateway includes control The packet data gateway 109 and the user plane packet data gateway 110.
  • the evolved terrestrial radio access network 101 can be used to implement all functions related to the evolved network radio.
  • the mobility management entity 104 is responsible for the mobility management of the control plane, including user context and mobility state management, assigning user temporary identity.
  • the home subscriber server 103 is used to store subscriber subscription information.
  • the serving gateway includes a user plane serving gateway 108 and a control plane serving gateway 107, which is a forwarding plane anchor between the 3GPP access networks, terminating the interface of the evolved terrestrial radio access network 101.
  • the packet data gateway includes a user plane packet data gateway 110 and a control plane packet data gateway 109, which is a forwarding plane anchor point between the 3GPP access network and the non-3GPP access network, and is connected to the external packet data network 102, and is responsible for policy execution and Billing.
  • the policy and charging rule function 106 is responsible for formulating QoS (Quality of Service, QoS, Quality of Service) and charging related policies based on the subscription information, the service demand information from the packet data network 102, and the number of packets.
  • QoS Quality of Service
  • the user attribute memory 105 is used to store subscription information related to user QoS and charging.
  • the service gateway and the packet data gateway have both control plane and user plane functions.
  • the control plane function is mainly responsible for establishing the bearer of the forwarding plane, maintaining the bearer context, and providing an interface for communication with other control plane network elements or functions.
  • the user plane function is mainly responsible for receiving the uplink and downlink packets for the user equipment 100, and forwarding the packets according to the indication of the function of the gateway control plane, and performing operations such as QoS and statistics.
  • the service gateway and the packet data gateway are generally deployed in one. It should be noted that once the user equipment 100 is connected to the network and assigned an IP address, the packet data gateway connected by the user is anchored to ensure the IP address continuity of the user equipment 100, even if the user equipment 100 is mobile. The mobile management entity 104 and the service gateway are replaced. Since the packet data gateway has not changed, the message sent to the user equipment 100 is still routed to the original packet data gateway, and the packet data gateway is in the service that the packet is currently connected through the user equipment 100. The gateway and the universal terrestrial radio access network 101 (e.g., evolved nodes) are sent to the user equipment 100 to achieve business continuity.
  • the gateway and the universal terrestrial radio access network 101 e.g., evolved nodes
  • the new mobility management entity needs to access the user context from the mobile management entity 104 connected before the location update of the user equipment and the packet data gateway as the IP anchor gateway.
  • the interaction process of the method for obtaining the user context is too It is cumbersome and the efficiency of obtaining user context is low.
  • the technical problem to be solved by the embodiments of the present invention is to provide a user context acquisition, a search method, and a related device, which can solve the problem that the signaling process for obtaining a user context in the prior art is too cumbersome and has low acquisition efficiency.
  • the application provides a method for obtaining a user context, including:
  • the second service control plane network element receives the request message sent by the radio access network, where the request message carries the first global unique temporary identifier GUTI, and the first GUTI includes at least the identifier for identifying the first service control plane network element.
  • the first service control plane network element identifier and the first user temporary identifier;
  • the second serving control plane network element acquires a user context corresponding to the first GUTI.
  • the network element of the service control plane controls the network element identifier of the anchor point carried in the GUIT, and the network element of the service control plane can directly obtain the user context, establish a connection with the network element of the anchor control plane, and avoid Obtaining the user context in the old service control plane network element reduces the number of signaling interactions and improves the efficiency of acquiring the user context.
  • the first GUTI further includes an anchor control plane network element identifier for identifying an anchor control plane network element
  • the acquiring, by the second service control plane, the user context corresponding to the first GUTI includes:
  • the second serving control plane network element receives the user context returned by the anchor control plane network element.
  • the service control plane network element can directly determine the anchor point control plane network element and obtain the user context from the anchor point control plane network element by extending the anchor point control plane network element identifier carried in the GUIT. Establishing a connection with the network element of the anchor control plane avoids obtaining the user context from the old service control plane network element, reduces the number of signaling interactions, and improves the efficiency of acquiring the user context.
  • the acquiring, by the second serving control plane network element, the user context corresponding to the first GUTI includes:
  • the second serving control plane network element searches the user context of the second serving control plane network element by using the first serving control plane network element identifier and the first user temporary identifier as a context index;
  • the second serving control plane network element acquires the user context corresponding to the first serving control plane network element identifier and the first user temporary identifier.
  • the user equipment can send the anchor point control plane network element identifier, save signaling, and avoid redundant signaling process. I, improve the efficiency of getting user context.
  • the second service control plane network element acquires a user context corresponding to the first GUTI acquisition, and further includes:
  • the second serving control plane network element requests the user equipment to identify the anchor control plane network element identifier of the anchor control plane network element;
  • the second serving control plane network element receives the user context returned by the anchor control plane network element.
  • Also after the second serving control plane network element receives the user context returned by the anchor control plane network element ,Also includes:
  • the second service control plane network element allocates a second user temporary identifier and a second service control plane network element identifier for identifying the second service control plane network element;
  • the second serving control plane network element generates a second GUTI according to the second user temporary identifier and the second service control plane network element identifier;
  • the second serving control plane network element returns a context response message to the anchor control plane network element, where the context response message carries the second GUTI, and the context response message is used to indicate the anchor point control
  • the face network element updates the context index used to find the user context.
  • the method further includes:
  • the second serving control plane network element returns a response message to the radio access network; wherein the response message carries the second GUTI.
  • the second serving control plane network element receives the user context returned by the anchor control plane network element After that, it also includes:
  • the second service control plane network element is configured to identify the second service control plane network element identifier of the second service control plane network element, and generate a second GUTI according to the second service control plane network element identifier;
  • the second serving control plane network element returns a response message to the radio access network, where the accept message carries the second GUTI.
  • the method further includes:
  • the second serving control plane network element sends a paging message to the radio access network, where the paging message carries the anchor control plane network element identifier and the first user temporary identifier.
  • the application provides a user context search method, including:
  • the anchor control plane network element receives the context request message sent by the second serving control plane network element, where the context request message carries a first global unique temporary identifier GUTI, and the first GUTI includes a first user temporary identifier;
  • the anchor control plane network element searches for a user context according to the first GUTI
  • the anchor control plane network element returns the user context to the second serving control plane network element.
  • the anchor control plane network element directly sends the user context to the service control plane network element according to the request of the service control plane network element, and the service control plane network element establishes and controls the anchor point according to the received user context.
  • the connection of the surface network element prevents the network element of the service control plane from obtaining the user context from the old service control plane network element, reduces the number of signaling interactions, and improves the efficiency of acquiring the user context.
  • the first GUTI further includes a first service control plane network element identifier for identifying a first serving control plane network element
  • the finding, by the anchor control plane network element, the user context according to the first GUTI includes:
  • the anchor control plane network element searches the user context by using the first service control plane network element identifier and the first user temporary identifier as a context index.
  • the anchor control plane network element and the first serving control plane network element are the same network element;
  • the anchor control plane network element Before receiving the context request message sent by the second serving control plane network element, the anchor control plane network element further includes:
  • the anchor control plane network element is configured to identify an anchor control plane network element identifier of the anchor control plane network element, the first service control plane network element identifier, and the first user temporary identifier, and create a site Describe a user context, the first service control plane network element identifier and the first user temporary identifier as a context index for finding the user context;
  • the anchor control plane network element generates the first GUTI, and returns a response message carrying the first GUTI to the radio access network, where the response message is used to indicate that the user equipment saves the first GUTI .
  • the anchor control plane network element receives the context response message sent by the second serving control plane network element, where the context response message carries a second GUTI, and the second GUTI includes the second service identifier a second service control plane network element identifier of the control plane network element and a second user temporary identifier;
  • the anchor control plane network element updates the context index used to find the user context according to the second serving control plane network element identifier and the second user temporary identifier.
  • the method before the receiving, by the anchor control plane network element, the context request message sent by the second serving control plane network element, the method further includes:
  • the anchor control plane network element receives the session establishment request message sent by the first serving control plane network element, where the session establishment request message carries the first service control plane network element identifier and the first user temporary identifier ;
  • the anchor control plane network element creates the user context, and uses the first service control plane network element identifier and the first user temporary identifier as a context index for searching the user context;
  • the anchor control plane network element returns a session creation success message carrying the control plane network element identifier to the first serving control plane network element; the session creation success message is used to indicate the first service control plane network The element generates the first GUTI.
  • the first GUTI further includes an anchor control plane network element identifier for identifying the anchor control plane network element
  • the finding, by the anchor control plane network element, the user context according to the first GUTI includes:
  • the anchor control plane network element searches the user context by using the anchor control plane network element identifier and the first user temporary identifier as a context index.
  • the anchor control plane network element identifier and the user temporary identifier are used as indexes of the user context, and the service control plane network element can search for the associated user context from the anchor control plane network element, and the anchor control plane The NE does not need to update the index of the user context, which further reduces the number of interactions and improves the efficiency of obtaining the user context.
  • the anchor control plane network element and the first serving control plane network element are the same network element;
  • the anchor control plane network element Before receiving the context request message sent by the second serving control plane network element, the anchor control plane network element further includes:
  • the anchor control plane network element allocates the anchor control plane network element identifier, the first service control plane network element identifier used to identify the first service control plane network element, and the first user temporary identifier, and creates a user context. And using the anchor control plane network element identifier and the first user temporary identifier to search for a context index of the user context;
  • the anchor control plane network element generates the first GUTI, and returns a response message carrying the first GUTI to the radio access network, where the response message is used to indicate that the user equipment saves the first GUTI.
  • the method before the receiving, by the anchor control plane network element, the context request message sent by the second serving control plane network element, the method further includes:
  • the anchor control plane network element receives the session establishment request message sent by the first serving control plane network element, where the session establishment request message carries a first service control plane for identifying the first service control plane network element Network element identifier;
  • the anchor control plane network element creates the user context, allocates the first user temporary identifier and the anchor control plane network element identifier, and identifies the anchor control plane network element identifier and the first user a temporary identifier as a context index for finding the user context;
  • a session creation success message to the first service control plane network element, where the session creation success message carries the anchor control plane network element identifier and the first user temporary identifier
  • the session creation success message is used to instruct the first service control plane network element to create the first GUTI.
  • the application provides a service control plane network element, including:
  • a receiving module configured to receive a request message sent by the radio access network, where the request message carries a first global unique temporary identifier GUTI, where the first GUTI includes at least a first identifier for identifying a first serving control plane network element The service control plane network element identifier and the first user temporary identifier;
  • an obtaining module configured to acquire a user context corresponding to the first GUTI.
  • the first GUTI further includes an anchor control plane network element identifier for identifying an anchor control plane network element
  • the obtaining module is used to:
  • the network element receives the user context returned by the anchor control plane network element.
  • the acquiring module is configured to:
  • the search result of the searching unit is yes, acquiring the user context corresponding to the first service control plane network element identifier and the first user temporary identifier.
  • the acquiring module is further configured to:
  • a fourth possible implementation manner after the acquiring module performs the receiving the user context returned by the anchor control plane network element, Also used for:
  • context response message carries the second GUTI
  • context response message is used to indicate that the anchor control plane network element update is used to search for the The context index of the user context.
  • the method further includes:
  • a returning module configured to return a response message to the radio access network, where the response message carries the second GUTI.
  • a sixth possible implementation after the acquiring module performs the receiving the user context returned by the anchor control plane network element, Also used for:
  • the method further includes:
  • a paging module configured to send a paging message to the radio access network, where the paging message carries the anchor control plane network element identifier and the first user temporary identifier.
  • an anchor control plane network element including:
  • a first receiving module configured to receive a context request message sent by the second serving control plane network element, where the context request message carries a first global unique temporary identifier GUTI, where the first GUTI includes a first user temporary identifier;
  • a searching module configured to search for a user context according to the first GUTI
  • the first GUTI further includes a first service control plane network element identifier for identifying a first serving control plane network element
  • the lookup module is used to:
  • the first service control plane network element identifier and the first user temporary identifier are used as a context index to search for the user context.
  • the anchor control plane network element and the first serving control plane network element are the same network element;
  • the anchor control plane network element further includes:
  • a second receiving module configured to receive a request message sent by the radio access network
  • a creating module configured to allocate an anchor control plane network element identifier for identifying the anchor control plane network element, the first service control plane network element identifier, and the first user temporary identifier, and create the user context Determining, by using the first service control plane network element identifier and the first user temporary identifier as a context index for searching the user context;
  • the first response module is configured to generate the first GUTI, and return a response message carrying the first GUTI to the radio access network, where the response message is used to indicate that the user equipment saves the first GUTI.
  • the anchor control plane network element further includes:
  • a third receiving module configured to receive a context response message sent by the second serving control plane network element, where the context response message carries a second GUTI, and the second GUTI includes the second service control a second service control plane network element identifier of the polygon network element and a second user temporary identifier;
  • An index update module configured to update, according to the second service control plane network element identifier and the second user temporary identifier, the context index used to search for the user context.
  • the anchor control plane network element further includes:
  • a fourth receiving module configured to receive a session establishment request message sent by the first service control plane network element, where the session establishment request message carries the first service control plane network element identifier and the first user temporary identifier;
  • a second creating module configured to create the user context, and use the first service control plane network element identifier and the first user temporary identifier as a context index for searching the user context;
  • a second response module configured to return a session creation success message carrying the control plane network element identifier to the first serving control plane network element, where the session creation success message is used to indicate the first service control plane network element Generating the first GUTI.
  • the first GUTI further includes an anchor control plane network element identifier for identifying the anchor control plane network element
  • the lookup module is used to:
  • the anchor control plane network element identifier and the first user temporary identifier are used as a context index to search for the user context.
  • the anchor control plane network element and the first serving control plane network element are the same network element;
  • the anchor control plane network element further includes:
  • a fifth receiving module configured to receive a request message sent by the radio access network
  • a third creating module configured to allocate the anchor control plane network element identifier, the first service control plane network element identifier used to identify the first service control plane network element, and the first user temporary identifier, and create a user context, Using the anchor control plane network element identifier and the first user temporary identifier to search for a context index of the user context;
  • a third response module configured to generate the first GUTI, and return a response message carrying the first GUTI to the radio access network, where the response message is used to indicate that the user equipment saves the first GUTI .
  • the anchor control plane network element further includes:
  • a sixth receiving module configured to receive a session establishment request message sent by the first serving control plane network element, where the session establishment request message carries a first service control plane network for identifying a first service control plane network element Meta-identification
  • a fourth creating module configured to create the user context, assign the first user temporary identifier and the anchor control plane network element identifier, and set the anchor control plane network element identifier and the first user temporary Identifying a context index as a lookup for the user context;
  • a fourth response module configured to return a session creation success message to the first service control plane network element, where the session creation success message carries the anchor control plane network element identifier and the first user temporary identifier, The session creation success message is used to instruct the first service control plane network element to create the first GUTI.
  • the application provides a service control plane network element, including:
  • processors One or more processors, memories, bus systems, transceivers, and one or more programs, the processor, the memory, and the transceiver being coupled by the bus system;
  • the one or more programs are stored in the memory, the one or more programs comprising instructions that, when executed by the service control plane network element, cause the service control plane network element to perform The method of any one of the first possible aspect of the first aspect.
  • the present application provides a computer readable storage medium storing one or more programs, the one or more programs including instructions that, when executed by a service control plane network element, cause the service to be controlled
  • the face network element performs the method of one of the first aspect to the seventh possible implementation of the first aspect.
  • an anchor control plane network element including:
  • processors One or more processors, memories, bus systems, transceivers, and one or more programs, the processor, the memory, and the transceiver being coupled by the bus system;
  • the one or more packages Enclosing instructions that, when executed by the anchor control plane network element, cause the anchor control plane network element to perform any of the seventh possible implementations of the second aspect to the second aspect Methods.
  • the present application provides a computer readable storage medium storing one or more programs, the one or more programs including instructions that, when executed by an anchor control surface network element, cause the anchor
  • the point control plane network element performs the method according to any of the second aspect to the seventh possible implementation of the second aspect.
  • 1 is a schematic structural diagram of an existing EPC network
  • FIG. 2 is a schematic structural diagram of a next generation mobile communication system
  • FIG. 3 is another schematic structural diagram of a next generation mobile communication system
  • FIG. 4 is a schematic flowchart of a method for acquiring a user context according to an embodiment of the present invention
  • FIG. 5 is a schematic flowchart of a user context searching method according to an embodiment of the present invention.
  • FIG. 6 is a schematic diagram of interaction of a user context acquisition method according to a first embodiment of the present invention.
  • FIG. 7 is a schematic diagram of interaction of a user context acquisition method according to a second embodiment of the present invention.
  • FIG. 8 is a schematic diagram of interaction of a user context acquisition method according to a third embodiment of the present invention.
  • FIG. 9 is a schematic diagram of interaction of a user context acquisition method according to a fifth embodiment of the present invention.
  • FIG. 10 is a schematic diagram of interaction of a user context acquisition method according to a sixth embodiment of the present invention.
  • FIG. 11 is a schematic diagram of interaction of a user context acquisition method according to a seventh embodiment of the present invention.
  • FIG. 12 is a schematic diagram of interaction of a calling method according to an embodiment of the present invention.
  • FIG. 13 is a schematic structural diagram of a service control plane network element according to an embodiment of the present disclosure.
  • FIG. 14 is another schematic structural diagram of a service control plane network element according to an embodiment of the present disclosure.
  • 15 is a schematic structural diagram of an anchor point control plane network element according to an embodiment of the present invention.
  • FIG. 16 is another schematic structural diagram of an anchor point control plane network element according to an embodiment of the present invention.
  • FIG. 2 is a schematic structural diagram of a next-generation communication system according to an embodiment of the present invention.
  • the control plane functions of the service gateway and the packet data gateway are further separated, and the separated control plane functions through a standard interface. Control the forwarding plane function of the gateway. Because the separated control plane functions and other existing control plane network elements (such as MME) have duplicate functions, the separated control plane functions and other control plane network elements are merged into a merged control plane.
  • the network element hereinafter referred to as the control plane network element is used to reduce functional redundancy and reduce interaction between control plane functions.
  • the next generation communication system includes a user equipment, at least one radio access network, a control plane network element, a user plane network element, a subscription database, and a packet data network, wherein each control plane network element is uniquely associated with one user plane network element, and each The radio access network can be connected to one or more control plane network elements.
  • the radio access network and the control plane network element with the connection relationship are connected through the S1-C interface; the control plane network element and the corresponding user plane device 2 are connected through the S18 interface; the user plane device and the wireless connection with the connection relationship
  • the network is connected through the S1-U interface.
  • the control plane network element is used for transmission control, and the control plane network element combines the functions of multiple network entities.
  • control plane network element specifically integrates the functions of the mobility management entity MME, the control plane serving gateway, and the control plane packet data gateway.
  • the control plane network element can be used for user authentication, authorization, and mobility management network elements, and generates forwarding rules and delivers them to the user plane for execution.
  • the contract database integrates the functions of HSS and SPR. Multiple control plane network elements can share a subscription database, and multiple control plane network elements and user plane network elements share a packet data network.
  • the user plane device has a programmable function, and the user plane device is used to transmit service data.
  • the next generation communication system includes: user equipment 200, subscription database 201, control plane network element 202, packet data network 203, radio access network 204, user plane equipment 205, control plane network element 206, user plane equipment 208, and
  • the location update process is: the user equipment 200 initially accesses the radio access network 204, and the control plane network element 202 connected to the radio access network 204 is the service control plane network element and the anchor control network.
  • the control plane network element 202 allocates an IP address and a user context to the user equipment 200, and the control plane network element 202 establishes a connection between the associated user plane equipment 205.
  • the control plane network element 206 connected to the radio access network 207 is a service control plane network element, and the control plane network element 206 needs to acquire the user equipment.
  • FIG. 3 is a schematic structural diagram of another next generation communication system according to an embodiment of the present invention.
  • the communication system includes: at least one radio access network, mobility management network element, session management network element, user plane device, and packet data network.
  • the subscription database and the user equipment, each mobility management network element is associated with a session management network element, and each mobility management network element and the session management network element are respectively connected to one user plane device, and each wireless access network can be connected to one
  • the mobility management network element MM, Mobility Management, mobility management network element
  • the session management network element SM, Session Management, and the session management network element
  • the S1C interfaces are connected to each other through the S1-C interface.
  • the radio access network and the user plane device with the connection relationship are connected through the S1-U interface.
  • the mobility management NE and the associated session management NE pass S11.
  • the interface is connected, and the session management NE is connected to the associated user plane device through the S18 interface.
  • the contract database integrates the functions of HSS and SPR.
  • the user plane device associated with the mobility management network element and the user plane device associated with the session management network element have programmable functions; the session management network element is mainly used for authenticating authorized users, IP address allocation, selecting and managing user plane devices; mobility management The network element is mainly used for mobility management network elements, including location update, paging, handover, selection, and management of user plane devices.
  • the user plane device associated with the mobility management network element and the user plane device associated with the session management network element may be unified. For example, the user plane device connected to the packet data network may simultaneously connect to the current radio access network, and then the two user plane devices. For the same device.
  • the next generation communication system includes: a user equipment 300, a subscription database 301, a radio access network 302, a packet data network 303, a mobility management network element 304, and a session management network element 305.
  • the user equipment 300 is initially connected to the radio access network 302.
  • the mobility management network element 304 connected to the radio access network 302 is a service control plane network element
  • the session management network element 305 associated with the mobility management network element 304 is an anchor control network. yuan.
  • the mobility management network element connected to the radio access network 308 is another serving control plane network element.
  • FIG. 4 is a schematic flowchart of a method for acquiring a user context according to an embodiment of the present invention.
  • the method includes:
  • the second service control plane network element receives the request message sent by the radio access network, where the request message carries a first global unique temporary identifier GUTI, where the first GUTI includes at least the first service control plane network.
  • the first service control plane network element identifier of the element and the first user temporary identifier.
  • the radio access network has a connection relationship with the second service control plane network element, and the request message may be a location update request message or a re-attach request message; the request message is forwarded by the user equipment to the second through the radio access network.
  • Service control plane network element The request message carries the first service control plane network element identifier and the first user temporary identifier, where the first service control plane network element identifier is used to identify the identity of the first service control plane network element, and the first user temporary identifier is used to identify the user equipment.
  • the identity of the user for example, the user temporary identifier may be M-TMS (M-Temporary Mobile Subscriber Identity, M-TMSI).
  • the second serving control plane network element acquires a user context corresponding to the first GUTI.
  • the second service control plane network element acquires a user context corresponding to the first GUTI, where the second service control plane network element can locally obtain the user context corresponding to the first GUTI, or the second service control plane network element
  • the user context corresponding to the first GUTI is obtained on other network elements, and the present invention is not limited.
  • the network element of the service control plane controls the network element identifier of the anchor point carried in the GUIT, and the network element of the service control plane can directly obtain the user context, establish a connection with the network element of the anchor control plane, and avoid Obtaining the user context in the old service control plane network element reduces the number of signaling interactions and improves the efficiency of acquiring the user context.
  • the first GUTI further includes an anchor control plane network element identifier for identifying an anchor control plane network element
  • the acquiring, by the second service control plane, the user context corresponding to the first GUTI includes:
  • the second serving control plane network element receives the user context returned by the anchor control plane network element.
  • the first GUTI includes a first service control plane network element, a first user temporary identifier, and an anchor control plane network element identifier, and the anchor control plane network element identifier is used to identify an identity of the anchor control plane network element.
  • the method for the second service control plane network element to obtain the user context corresponding to the first GUTI may be: the second service control plane network element sends a context request message carrying the first GUTI to the anchor control plane network element, and the anchor point control network The UE receives the context request message, and the first GUTI is carried in the context request message to search for the user context corresponding to the first GUTI, and the second serving control plane network element receives the user context returned by the anchor control plane network element.
  • the acquiring, by the second serving control plane network element, the user context corresponding to the first GUTI includes:
  • the second serving control plane network element searches the user context of the second serving control plane network element by using the first serving control plane network element identifier and the first user temporary identifier as a context index;
  • the second serving control plane network element acquires the user context corresponding to the first serving control plane network element identifier and the first user temporary identifier.
  • the second service control plane network element device stores the user context of the user equipment locally, and then the user equipment subsequently connects to the second service control plane network element.
  • the second service control plane network element can directly obtain the locally stored user up and down, and perform the process of the subsequent IP connection.
  • the second serving control plane network element may obtain the user context corresponding to the first GUTI by using the first serving control plane network element and the first user temporary identifier as the context index in the second serving control plane network element.
  • User context if the user context is found, the second service control plane network element will find the user context.
  • the second service control plane network element acquires a user context corresponding to the first GUTI acquisition, and further includes:
  • the second serving control plane network element requests the user equipment to identify the anchor control plane network element identifier of the anchor control plane network element;
  • the second serving control plane network element receives the user context returned by the anchor control plane network element.
  • the first service control plane network element and the first user temporary identifier are used as the context index to search for the user context on the second service control plane network element. If the user context is not queried, the second service control plane network element obtains the user context from the user equipment.
  • the identifier of the anchor control plane network element for identifying the network element of the anchor control plane, the second service control plane network element acquiring the control plane network element identifier returned by the user equipment, and the second service control plane network element identifier to the anchor point control plane network The element sends a context request message carrying the first GUTI, and the anchor control plane network element can search for the user context according to the first service control plane network element identifier and the first user temporary identifier carried in the first GUTI, and the second service control plane network element Receives the user context returned by the anchor control plane network element.
  • the method further includes:
  • the second service control plane network element allocates a second user temporary identifier and a second service control plane network element identifier for identifying the second service control plane network element;
  • the second serving control plane network element generates a second GUTI according to the second user temporary identifier and the second service control plane network element identifier;
  • the second serving control plane network element returns a context response message to the anchor control plane network element, where the context response message carries the second GUTI, and the context response message is used to indicate the anchor point control
  • the face network element updates the context index used to find the user context.
  • the second service control plane network element allocates the second user temporary identifier and the second service control plane network element identifier, and the second service control
  • the face network element identifier is used to identify the identity of the second service control plane network element
  • the second temporary identifier is used to identify the identity of the user on the user equipment. For security reasons, each time a location update occurs, a new one needs to be allocated. User temporary identification.
  • the method for generating the second GUTI by the second serving control plane network element according to the second user temporary identifier and the second serving control plane network element identifier may be: the second serving control plane network element replaces the first user temporary identifier in the first GUTI For the second user temporary identifier, the first service control plane network element identifier is replaced with the second service control plane network element identifier, and the anchor control plane network element identifier remains unchanged. After the replacement is completed, the first GUTI is changed to the second GUTI. That is, the second GUTI includes the second service control plane network element identifier, the anchor control plane network element identifier, and the second user temporary identifier.
  • Second service control plane network element Returning a context response message to the anchor control plane network element, where the context response message carries the second GUTI or the context response message carries the second service control plane network element identifier and the second user temporary identifier, and the context response message is used to indicate the anchor control plane network
  • the meta update is used to look up the context index of the user context.
  • it also includes:
  • the second serving control plane network element returns a response message to the radio access network; wherein the response message carries the second GUTI.
  • the second serving control plane network element After the second serving control plane network element generates the second GUTI, the second serving control plane network element returns a response message to the radio access network, where the response message is corresponding to the request message, and the request message is a location update request message, and the response message is sent.
  • the message is received for the location update; when the request message is a reattach request message, the response message is a reattach response message.
  • the radio access network returns a response message carrying the second GUTI to the user equipment, and after receiving the response message, the user equipment updates the stored first GUTI to the second GUTI.
  • the method further includes:
  • the second service control plane network element is configured to identify the second service control plane network element identifier of the second service control plane network element, and generate a second GUTI according to the second service control plane network element identifier;
  • the second serving control plane network element returns a response message to the radio access network, where the accept message carries the second GUTI.
  • the second service control plane network element allocates the second service control plane network element identifier, and the second service control plane network element identifier is used. Identifying the identity of the second service control plane, the second service control plane network element replacing the first service control plane network element identifier in the first GUTI with the second service control plane network element identifier, the first user temporary identifier and the anchor point control The first network element is changed to the second GUTI, that is, the second GUTI includes the second service control plane network element identifier, the first user temporary identifier, and the anchor control plane network element identifier.
  • the second service control plane network element returns a response message carrying the second GUTI to the radio access network, and the radio access network returns the second GUTI to the user equipment, and the user equipment receives the response message, and replaces the stored first GUTI with the first Two GUTI.
  • the method further includes:
  • the second serving control plane network element sends a paging message to the radio access network, where the paging message carries the anchor control plane network element identifier and the first user temporary identifier.
  • FIG. 5 is a schematic flowchart of a method for searching a user context according to an embodiment of the present invention.
  • the method includes:
  • the anchor control plane network element receives the context request message sent by the second serving control plane network element, where the context request message carries a first global unique temporary identifier GUTI, and the first GUTI includes a first user temporary identifier.
  • the first GUTI is used to identify the identity of the user on the user equipment. For security reasons, each time a location update occurs, a new temporary identifier of the user needs to be allocated.
  • the anchor control plane network element searches for a user context according to the first GUTI.
  • the anchor control plane network element stores the user context of the user equipment, and establishes a mapping relationship between the first GUTI and the user context, and the anchor control plane network element queries and according to the mapping relationship.
  • the anchor control plane network element returns the user context to the second serving control plane network element.
  • the anchor control plane network element returns the searched user context to the second service control plane network element, and the second service control plane network element establishes an IP connection with the anchor control plane network element according to the user context, and maintains the IP session continuity. Sex.
  • the context request message carrying the GUIT sent by the network element of the control plane of the anchor control plane network is directly returned to the service control plane network element to the user context, so that the service control plane network element can be based on the user context.
  • Establishing a connection with the network element of the anchor control plane prevents the network element of the service control plane from obtaining the user context from the old service control plane network element, reduces the number of signaling interactions, and improves the efficiency of acquiring the user context.
  • the first GUTI further includes a first service control plane network element identifier used to identify the first serving control plane network element;
  • the finding, by the anchor control plane network element, the user context according to the first GUTI includes:
  • the anchor control plane network element searches the user context by using the first service control plane network element identifier and the first user temporary identifier as a context index.
  • the anchor control plane network element and the first service control plane network element are the same network element;
  • the anchor control plane network element Before receiving the context request message sent by the second serving control plane network element, the anchor control plane network element further includes:
  • the anchor control plane network element is configured to identify an anchor control plane network element identifier of the anchor control plane network element, the first service control plane network element identifier, and the first user temporary identifier, and create a site Describe a user context, the first service control plane network element identifier and the first user temporary identifier as a context index for finding the user context;
  • the anchor control plane network element generates the first GUTI, and returns a response message carrying the first GUTI to the radio access network, where the response message is used to indicate that the user equipment saves the first GUTI .
  • the method further includes:
  • the anchor control plane network element receives the context response message sent by the second serving control plane network element, where the context response message carries a second GUTI, and the second GUTI includes the second service identifier a second service control plane network element identifier of the control plane network element and a second user temporary identifier;
  • the anchor control plane network element updates the context index used to find the user context according to the second serving control plane network element identifier and the second user temporary identifier.
  • the method before receiving, by the anchor control plane network element, the context request message sent by the second serving control plane network element, the method further includes:
  • the anchor control plane network element receives the session establishment request message sent by the first serving control plane network element, where the session establishment request message carries the first service control plane network element identifier and the first user temporary identifier ;
  • the anchor control plane network element creates the user context, and uses the first service control plane network element identifier and the first user temporary identifier as a context index for searching the user context;
  • the anchor control plane network element returns a session creation success message carrying the control plane network element identifier to the first serving control plane network element; the session creation success message is used to indicate the first service control plane network The element generates the first GUTI.
  • the first GUTI further includes an anchor control plane network element identifier for identifying the anchor control plane network element
  • the finding, by the anchor control plane network element, the user context according to the first GUTI includes:
  • the anchor control plane network element searches the user context by using the anchor control plane network element identifier and the first user temporary identifier as a context index.
  • the anchor control plane network element and the first service control plane network element are the same network element;
  • the anchor control plane network element Before receiving the context request message sent by the second serving control plane network element, the anchor control plane network element further includes:
  • the anchor control plane network element allocates the anchor control plane network element identifier, the first service control plane network element identifier used to identify the first service control plane network element, and the first user temporary identifier, and creates a user context. And using the anchor control plane network element identifier and the first user temporary identifier to search for a context index of the user context;
  • the anchor control plane network element generates the first GUTI, and returns a response message carrying the first GUTI to the radio access network, where the response message is used to indicate that the user equipment saves the first GUTI.
  • the method before receiving, by the anchor control plane network element, the context request message sent by the second serving control plane network element, the method further includes:
  • the anchor control plane network element receives the session establishment request message sent by the first serving control plane network element, where the session establishment request message carries a first service control plane for identifying the first service control plane network element Network element identifier;
  • the anchor control plane network element creates the user context, allocates the first user temporary identifier and the anchor control plane network element identifier, and identifies the anchor control plane network element identifier and the first user a temporary identifier as a context index for finding the user context;
  • a session creation success message to the first service control plane network element, where the session creation success message carries the anchor control plane network element identifier and the first user temporary identifier
  • the session creation success message is used to instruct the first service control plane network element to create the first GUTI.
  • FIG. 6 is a schematic diagram of interaction of a method for acquiring a user context according to a first embodiment of the present disclosure.
  • the method is applicable to the network architecture of FIG. 2, where the method includes:
  • the user equipment 200 establishes an RRC connection with the radio access network 204.
  • the user equipment 200 sends an attach request message to the radio access network 204.
  • the attach request message carries an empty control plane network element identifier, and the control plane network element identifier is used to indicate the identity of the control plane network element.
  • the radio access network 204 selects a service according to a load of each control plane network element connected to itself. Control plane network element.
  • the radio access network 204 receives the attach request message sent by the user equipment 200, and the radio access network 204 cannot select the service control plane network according to the indication of the attach request message due to the empty control plane network element identifier carried in the attach request message.
  • the radio access network 204 can obtain the load parameters of the network elements of the control planes that have the connection jurisdiction of the radio access network 204.
  • the load parameters can be one or more of the number of users, the throughput, and the transmission delay.
  • the access network 204 can select the lightest control plane network element as the service control plane network element according to the load parameter, and assume that the selected service control plane network element is the control plane network element 202.
  • the control plane network element 202 selected here is both an anchor point control plane network element and a service control. Face network element.
  • the radio access network 202 sends an attach request message to the control plane network element 202.
  • the attach request message carries an IMSI (International Mobile Subscriber Identification Number, IMSI for short) of the user equipment 200.
  • IMSI International Mobile Subscriber Identification Number
  • the control plane network element 202 completes the UE attach procedure, authenticates the authorized user, assigns an IP address, and the control plane network element 202 instructs the associated user plane device 205 to establish a connection to the packet data network 203; the control plane network element 202 creates the user equipment.
  • a user context of 200 generates a first GUTI.
  • the first GUTI includes a first service control plane network element identifier, an anchor control plane network element identifier, and a first user temporary identifier of the user equipment 200.
  • the above three identifiers can be implemented by fields in the GUTI.
  • the control plane network element 202 uses the first service control plane network element identifier and the first user temporary identifier as the context index of the created user context.
  • the anchor control plane network element identifier indicates the identity of the control plane network element 202.
  • the first service control plane network element identifier indicates the identity of the control plane network element 202, and the service control plane of the first service control plane network element identifier identifier
  • the network element has a connection relationship with the radio access network 204 where the user equipment 200 is located, and the first user temporary identifier is used to indicate the current identity of the user equipment 200.
  • the control plane network element 202 can be regarded as both an anchor control plane network element and a service control plane network element.
  • the control plane network element 202 returns an attach accept message to the radio access network 204, and the attach accept message carries the first GUTI.
  • the radio access network 204 receives the attach accept message carrying the first GUTI sent by the control plane network element 202, and forwards the attach accept message to the user equipment 200.
  • the user equipment 200 receives an attach accept message carrying the first GUTI returned by the radio access network 204, and stores the first GUTI locally in the user equipment 200.
  • the user equipment 200 sends a location update request message to the radio access network 207.
  • the location update request message carries the first GUTI and the first service control plane network element identifier.
  • the user equipment 200 when the user equipment 200 moves or because the user equipment 200 reselects the PLMN, the user equipment 200 needs to select a new radio access network for access, assuming that the user equipment 200 selects the radio access network 207 to establish an RRC connection.
  • the user equipment 200 After establishing the RRC connection, the user equipment 200 acquires the locally stored first GUTI and sends a location update request message to the radio access network 207.
  • the first GUTI is a control plane message, and the radio access network 207 is invisible to the first GUTI. Therefore, the location update request message further carries a separate first service control plane network element identifier.
  • the radio access network 207 selects a service control plane network element.
  • the radio access network 207 receives the location update request message that carries the first GUTI and the first service control plane network element identifier, and extracts the first service control plane network element identifier in the location update request message, and determines the radio access network 207. Whether the control plane network element represented by the first service control plane network element identifier is used as the service control plane network element; if there is a connection relationship, the control plane network element represented by the first service control plane network element identifier is used as the service control plane network element; if there is no connection For the relationship, the radio access network 207 selects the service control plane network element according to the load of each control plane network element that has a connection relationship with itself. For the method of selection, refer to the description of S403. It is assumed that the service control plane network element selected by the radio access network 207 is the control plane network element 206.
  • the radio access network 207 sends a location update request message carrying the first GUTI to the selected control plane network element 206.
  • the control plane network element 206 determines the anchor point control plane network element according to the anchor point control plane network element identifier.
  • control plane network element 206 receives the location update request that carries the first GUTI sent by the radio access network 207, extracts the anchor point control plane network element identifier in the first GUTI, and determines the control corresponding to the anchor point control plane network element identifier. Face network element 202.
  • the control plane network element 206 sends a context request message to the control plane network element 202, where the context request message carries the first GUTI.
  • the control plane network element 202 receives the context request message sent by the control plane network element 206, and extracts the first service control plane network element identifier and the first user temporary identifier in the first GUTI, and identifies the first service control plane network element identifier and The first user temporary identifier is used as a context index to find a corresponding user context.
  • the control plane network element 202 returns a context response message to the control plane network element 206.
  • the context response message carries the searched user context.
  • control plane network element 206 receives the user context returned by the control plane network element 202, and the control plane network element 206 saves the user context, establishes a connection relationship with the control plane network element 202 according to the user context, and establishes and user equipment according to the user context. Secure signaling channel between 200.
  • the control plane network element 206 allocates the second user temporary identifier and the second service control plane network element identifier, and the control plane network element 206 generates the second GUTI according to the second user temporary identifier and the second service control plane network element identifier.
  • the method for generating the second GUTI may be: the control plane network element 206 replaces the first user temporary identifier in the first GUTI with the second user temporary identifier, and replaces the first service control plane network element identifier with the second service control plane.
  • the network element identifier, the network element identifier of the anchor control plane remains unchanged, and the second GUTI is generated after the replacement, and the second GUTI includes the second service control plane network element identifier, the anchor control plane network element identifier, and the second user temporary identifier.
  • the second service control plane network element identifier is used to identify the identity of the control plane network element 206.
  • the user temporary identifier may be M-TMSI. When the control plane network element to which the user equipment 200 belongs changes, the user temporary identifier correspondingly occurs.
  • the user temporary identifier is unique only in the same control plane network element. Different control plane NEs may be assigned the same user temporary identifier.
  • the control plane network element 206 returns a context response message carrying the second GUTI to the control plane network element 202.
  • the control plane network element 202 receives the context response message, extracts the second service control plane network element identifier and the second user temporary identifier in the second GUTI, and updates the context index of the user context, specifically: the second service control plane network
  • the meta-identity and the second user temporary identity are new context indexes as user contexts.
  • the control plane network element 206 returns a location update accept message to the radio access network 207, where the location update accept message carries the second GUTI.
  • the radio access network 207 receives the location update accept message sent by the control plane network element 206, and forwards the location update accept message to the user equipment 200.
  • the location update accept message carries the second GUTI.
  • the user equipment 200 receives the location update accept message returned by the radio access network 207, completes the location update process, extracts the second GUTI in the location update accept message, and updates the locally stored first GUTI to the second GUTI.
  • the anchor point control network element identifier carried by the GUTI is served.
  • the control plane network element can directly determine the anchor point control plane network element, and obtain the user context from the anchor point control plane network element, establish a connection with the anchor point control plane network element, and prevent the service control plane network element from updating from the user equipment location before updating.
  • the user context of the service control plane network element is obtained, which reduces the number of signaling interactions and improves the efficiency of acquiring the user context.
  • FIG. 7 is a schematic diagram of interaction of a method for acquiring a user context according to a second embodiment of the present disclosure.
  • the method is applicable to the network architecture of FIG. 3, where the method includes:
  • the user equipment 300 establishes an RRC connection with the radio access network 302.
  • the user equipment 300 sends an attach request message to the radio access network 302, where the attach request message carries an empty control plane network element identifier, and the control plane network element identifier represents the control plane network element (including the mobility management network element and the session management network element) )identity of.
  • the radio access network 302 selects a service control plane network element according to the load.
  • the radio access network 302 receives the attach request message sent by the user equipment 300. Because the attach request message carries an empty control plane network element identifier, the radio access network 302 cannot identify the network element of the control plane that is hollow according to the attach request message. Instructing to select a service control plane network element, the radio access network 302 can select a service control plane network element according to the load of each mobility management network element that has a connection relationship with itself, and the selected method may be: the radio access network 302 Obtaining load parameters of each mobility management network element that has a connection relationship with itself, and the load parameter includes one or more of the number of users, throughput, and transmission delay, and selects the lightest mobility management network element according to the load parameter. As the service control plane network element, it is assumed that the service control plane network element selected by the radio access network 302 is the mobility management network element 304.
  • the radio access network 302 sends an attach request message to the selected mobility management network element 304, where the attach request message carries the IMSI of the user equipment 300.
  • the mobility management network element 304 receives the attach request message, and allocates the first service control plane network element identifier and the first user temporary identifier, where the first service control plane network element identifier is used to identify the identity of the mobility management network element 304. .
  • the mobility management network element 304 sends a session establishment request message to the session management network element 305, where the session establishment request message carries the first service control plane network element identifier and the first user temporary identifier.
  • the mobility management network element 304 uses the associated session management network element 305 as an anchor control plane network element.
  • the session management network element 305 authenticates the authorized user, assigns an IP address, and instructs the corresponding user plane device 307 to establish a connection to the packet data network 303.
  • the session management network element 305 generates a user context of the user equipment 300, and controls the first service.
  • the face network element identifier and the first user temporary identifier are used as the context index of the user context, and the session management network element 305 obtains the identity of the user as the anchor control plane network element identifier.
  • the session management network element 305 returns a session creation success message to the mobility management network element 304.
  • the session creation success message carries the anchor control plane network element identifier.
  • the mobility management network element 304 generates a first GUTI according to the allocated first service control plane network element identifier and the first user temporary identifier, and the anchor session identifier sent by the session management network element 305.
  • the first GUTI includes a first service control plane network element identifier, an anchor control plane network element identifier, and a first user temporary identifier. The above three identifiers can be implemented by the fields of the GUTI.
  • the mobility management network element 304 returns an attach accept message carrying the first GUTI to the radio access network 302.
  • the radio access network 302 receives the attach accept message carrying the first GUTI sent by the mobility management network element 304, and forwards the attach accept message to the user equipment 300.
  • the user equipment 300 receives the attach accept message sent by the radio access network 302, completes the attach procedure, and extracts the first GUTI in the attach accept message, and the user equipment 300 stores the first GUTI locally.
  • the user equipment 300 sends a location update request message carrying the first GUTI to the radio access network 308.
  • the user equipment 300 needs to select a new radio access network to access due to mobility or the user equipment 300 reselects the PLMN, etc., and assume that the user equipment selects the radio access network 308 to establish an RRC connection.
  • the user equipment 300 obtains the locally stored first GUTI, and sends a location update request message carrying the first GUTI to the radio access network 308.
  • the first GUTI is a control plane message, and the radio access network 308 is invisible to the first GUTI.
  • the location update request message also carries a separate first service control plane network element identifier.
  • the radio access network 308 determines a service control plane network element.
  • the radio access network 308 receives the location update request message sent by the user equipment, and extracts the first service control plane network element identifier in the location update request message, and the radio access network 2 determines the first service control plane network element identifier representation. Whether the control plane network element has a connection relationship. If there is a connection relationship, select the control plane network element indicated by the first service control plane network element identifier as the service control plane network element, if there is no connection connection The radio access network 308 determines the service control plane network element according to the load of each control plane network element that has a connection relationship with itself. The method for selecting may refer to S503, and assume that the service control plane network element determined by the radio access network 308 is mobile. Sex management network element 309.
  • the radio access network 308 sends a location update request message to the selected mobility management network element 309, where the location update request message carries the first GUTI.
  • the mobility management network element 309 receives the location update request message that is sent by the radio access network 308 and carries the first GUTI, and extracts the anchor control plane network element identifier in the first GUTI, and determines that the anchor control plane network element identifier indicates the session. Management network element 305.
  • the mobility management network element 309 sends a context request message to the session management network element 305, where the context request message carries the first GUTI.
  • the session management network element 305 indexes the user context according to the first service control plane network element identifier and the first user temporary identifier.
  • the session management network element 305 receives the context request message that is sent by the mobility management network element 309 and carries the first GUTI, and extracts the first service control plane network element identifier and the first user temporary identifier in the first GUTI, and the first The service control plane network element identifier and the first user temporary identifier are used as context indexes to search for corresponding user contexts.
  • the session management network element 305 returns a context response message to the mobility management network element 309, where the context response message carries the found user context.
  • the service control plane network element 309 receives the context response message sent by the session management network element 305, establishes a connection relationship with the session management network element 305 according to the user context in the context response message, and the service control plane network element 309 allocates the second.
  • the service control plane network element identifier and the second user temporary identifier replace the first service control plane network element identifier in the first GUTI with the second service control plane network element identifier, and the second service control plane network element is used to identify the service control The identity of the face network element 309.
  • the service control plane network element 309 generates a second GUTI according to the second user temporary identifier, and the method for generating the second GUTI may be: the service control plane network element 309 replaces the first user temporary identifier with the second user temporary identifier, and the anchor control plane The network element identifier remains unchanged, and the second GUTI is generated after the replacement operation.
  • the second GUTI includes the second service control plane network element identifier, the second user temporary identifier, and the anchor control plane network element identifier.
  • the service control plane network element 309 returns a context response message to the session management network element 305, where the context response message carries the second service control plane network element identifier and the second user temporary identifier.
  • the session management network element 305 receives the context response message sent by the service control plane network element 309, and updates the context index of the user context according to the second service control plane network element identifier and the second user temporary identifier in the context response message.
  • the service control plane network element 309 returns a location update accept message to the radio access network 308, where the location update accept message carries the second GUTI.
  • the radio access network 308 receives the location update accept message carrying the second GUTI returned by the service control plane network element 309, and forwards the location update accept message to the user equipment 300.
  • the user equipment 300 receives the location update accept message sent by the radio access network 308, completes the location update process, and updates the locally stored first GUTI by using the second GUTI.
  • the service control plane network element can directly determine the anchor point control plane network element, and obtain the user context from the anchor point control plane network element, and establish The connection with the network element of the anchor control plane prevents the network element of the service control plane from obtaining the user context from the network element of the service control plane before the location update of the user equipment, which reduces the number of signaling interactions and improves the efficiency of acquiring the user context.
  • FIG. 8 is a schematic diagram of an interaction process of a user context acquisition method according to a third embodiment of the present invention, which is applicable to the network architecture of FIG. 2, where the method includes:
  • the user equipment 200 establishes an RRC connection with the radio access network 204.
  • the user equipment 200 sends an attach request message to the radio access network 204, where the attach request message carries an empty control plane network element identifier.
  • the radio access network 204 receives the attach request message sent by the user equipment 200, and selects the target control plane network element according to the load of each control plane network element connected to the self-control plane.
  • the target control plane network element is both the service control plane network element and the The anchor control plane network element, and the selected target control plane network element is the control plane network element 202.
  • the radio access network 204 sends an attach request message to the selected control plane network element 202, where the attach request message carries the IMSI of the user equipment 200.
  • the control plane network element 202 completes the attaching process, authenticates the authorized user, instructs the associated user plane device 205 to establish a connection with the packet data network 203, and the control plane network element 202 creates a user context of the user equipment 200, and allocates the first service control plane.
  • NE identifier, anchor control plane network element identifier, and first use The temporary identifier of the user generates a first GUTI, where the first GUTI includes a first service control plane network element identifier, an anchor control plane network element identifier, and a first user temporary identifier.
  • the control plane network element 202 uses the first service control plane network element identifier and the first user temporary identifier as context indices for retrieving the user context.
  • the control plane network element 202 returns an attach request message to the radio access network 204, where the attach request message carries the first GUTI.
  • the radio access network 204 receives the attach request message that is sent by the control plane network element 202 and carries the first GUTI, and forwards the attach request message to the user equipment 200.
  • the user equipment 200 receives the attach request message sent by the radio access network 204, and locally stores the first GUTI in the attach request message.
  • S801-S808 is the same as the S601-S608 in FIG. 6.
  • the user equipment 200 sends a location update request message to the radio access network 207, where the location update request carries the first GUTI, where the first GUTI includes the first service control plane network element identifier and the first user temporary identifier, and does not include the anchor control plane.
  • the network element identifier because the first GUTI is the control plane message, the radio access network 207 is invisible, and the location update request message also carries a separate first service control plane network element identifier.
  • the radio access network 207 receives the location update request sent by the user equipment 200, selects the service control plane network element, and assumes that the selected service control plane network element is the control plane network element 206.
  • the radio access network 207 receives the location update request sent by the user equipment 200, selects the service control plane network element, and assumes that the selected service control plane network element is the control plane network element 206.
  • the specific process refer to the description of S610 of FIG. I will not repeat them here.
  • the radio access network 207 sends a location update request message to the selected control plane network element 206.
  • the location update request message carries the first GUTI.
  • the first GUTI includes the first service control plane network element identifier and the first user temporary identifier. Including the anchor control plane network element identifier.
  • the control plane network element 206 indexes the user context according to the first service control plane network element identifier and the first user temporary identifier. If the user equipment 200 is not the first access control plane network element 206, the control plane network element 206 may store the user equipment. In the user context of 200, the control plane network element 206 determines whether the user context associated with the first service control plane network element identifier and the first user temporary identifier is retrieved. If it is retrieved, S813 is performed.
  • the control plane network element 206 establishes a connection relationship with the control plane network element 202 according to the user context.
  • control plane network element 206 may request the anchor control plane network element identifier from the user equipment 200 through the radio access network 207.
  • the subsequent steps are the same as S612-S622 in FIG. 6, and the specific process may refer to The description of S612-S622 in FIG. 6 will not be repeated here.
  • the user equipment does not need to send the anchor point control plane network element identifier, save signaling, and reduce the load of the signaling process. Degree, providing the efficiency of getting the user context.
  • FIG. 9 is an interaction flowchart of a user context acquisition method according to a fifth embodiment of the present invention, which is applicable to the network structure of FIG. 3.
  • S901-S911 is the same as S701-S711 in FIG.
  • the device After the user equipment 300 establishes an RRC connection with the radio access network 308, the device sends a location update request message to the radio access network 308.
  • the location update request message carries the first GUTI, where the first GUTI includes the first service control plane network element identifier. And the first user temporary identifier, excluding the anchor control plane network element identifier.
  • the first GUTI is not visible to the radio access network 308, and the location update request message further carries a separate first serving control plane network element identifier.
  • the radio access network 308 receives the location update request message sent by the user equipment 300, and extracts the first service control plane network element identifier carried in the location update request message, and the radio access network 308 determines the identifier indicated by the network element identifier of the service control plane.
  • the radio access network 308 sends a location update request message to the control plane network element indicated by the service control plane network element identifier; if there is no connection relationship, the radio access network 308 according to the The load of each control plane network element having its own connection relationship selects the lightest control plane network element as the service control plane network element, and assumes that the service control plane network element selected by the radio access network 308 is the session management network element 309.
  • the radio access network 308 sends a location update request message to the session management network element 309.
  • the location update request message carries the first GUTI, where the first GUTI includes the first service control plane network element identifier and the first user temporary identifier, and does not include an anchor. Point control plane NE ID.
  • the service control plane network element 309 receives the location update request message, and according to the user context associated with the first service control plane network element identifier and the first user temporary identifier index, if the index is reached, S916 is performed.
  • the mobility management network element 309 establishes a connection relationship with the session management network element 305.
  • the mobility management network element 309 may provide the user equipment 300 to the user equipment 300 through the radio access network 308.
  • the anchor control plane IP element identifier is requested.
  • the subsequent steps are the same as those of S715-S724 in FIG. 7. For specific process, refer to S715 in FIG. 7. The description of S724 will not be repeated here.
  • the user equipment can send the anchor point control plane network element identifier, save signaling, and avoid redundant signaling process. I, improve the efficiency of getting user context.
  • FIG. 10 is a schematic diagram of an interaction process of a method for acquiring a user context according to a seventh embodiment of the present invention, which is applicable to the network architecture of FIG. 2, where the method includes:
  • the user equipment 200 establishes an RRC connection with the radio access network 204.
  • the user equipment 200 sends an attach request message to the radio access network 204.
  • the attach request message carries an empty control plane network element identifier, and the control plane network element identifier is used to indicate the identity of the control plane network element.
  • the radio access network 204 selects a target control plane network element according to the load of each control plane network element connected to itself.
  • the radio access network 204 receives the attach request message sent by the user equipment 200, and the radio access network 204 cannot select the target control plane network according to the indication of the attach request message due to the empty control plane network element identifier carried in the attach request message.
  • the radio access network 204 can obtain the load parameters of the network elements of the control planes that are connected to the radio access network 204.
  • the load parameters can be one or more of the number of users, the throughput, and the transmission delay.
  • the access network 204 can select the lightest control plane network element as the target control plane network element according to the load parameter, where the user equipment is the initial access, and the selected target control plane network element is both the anchor point control plane network element and the service.
  • the control plane network element assumes that the radio access network selects the control plane network element 202.
  • the radio access network 204 sends an attach request message to the selected control plane network element 202, where the attach request message carries the IMSI of the user equipment 200.
  • the control plane network element 202 completes the attachment process of the user equipment 200, authenticates the authorized user, assigns an IP address, and instructs the associated user plane device 205 to establish a connection to the packet data network 203; the control plane network element 202 creates a user of the user equipment 200.
  • Context, assigning the first service control plane network element The first GUTI is generated by the identifier, the anchor control plane network element identifier, and the first user temporary identifier.
  • the GUTI includes the first service control plane network element identifier, the anchor control plane network element identifier, and the first user temporary identifier. The above three identifiers can be implemented by the fields in the first GUTI.
  • the control plane network element 202 uses the anchor control plane network element identifier and the first user temporary identifier as the context index of the created user context; wherein the anchor control plane network element identifier represents the identity of the control plane network element 202, and the service control plane network
  • the meta-identity indicates the identity of the control plane network element that has a connection relationship with the radio access network 204 in which the user equipment 200 is located, and the first user temporary identifier is used to indicate the current identity of the user equipment 200.
  • the control plane network element 202 returns an attach accept message to the radio access network 204, and the attach accept message carries the first GUTI.
  • the radio access network 204 receives the attach accept message carrying the first GUTI sent by the control plane network element 202, and forwards the attach accept message to the user equipment 200.
  • the user equipment 200 receives an attach accept message carrying the first GUTI returned by the radio access network 204, and the user equipment 200 stores the first GUTI locally.
  • the user equipment 200 sends a location update request message to the radio access network 207, where the location update request message carries the first GUTI.
  • the user equipment needs to reselect a new radio access network due to the mobility of the user equipment 200 or the user equipment 200 reselecting the PLMN.
  • the user equipment selects the radio access network 207 to establish an RRC connection, after establishing the RRC connection.
  • the user equipment 200 obtains the locally stored first GUTI, and sends a location update request message to the radio access network 207.
  • the first GUTI is a message of the control plane, and the radio access network 207 is invisible to the first GUTI, and therefore the location update request message. It also carries a separate first service control plane network element identifier.
  • the radio access network 207 selects a service control plane network element.
  • the radio access network 207 receives the location update request message that carries the first GUTI and the first service control plane network element identifier, and extracts the first service control plane network element identifier in the location update request message, and determines the first service control. Whether the control plane network element indicated by the surface network element identifier has a connection relationship. If there is a connection relationship, the first service control plane network element identifier indicates that the control plane network element is used as the service control plane network element; if there is no connection relationship, the radio access network The 207 selects the service control plane network element according to the load of each control plane network element that has a connection relationship with itself. For the method of selection, refer to the description of S403. Assume that the service control plane network element selected by the radio access network is the control plane network element 206.
  • the radio access network 207 sends a location update request message carrying the first GUTI to the selected control plane network element 206.
  • the control plane network element 206 determines the anchor point control plane network element according to the anchor point control plane network element identifier.
  • control plane network element 206 receives the location update request that carries the first GUTI sent by the radio access network 207, extracts the anchor control plane network element identifier in the first GUTI, and determines the anchor represented by the anchor control plane network element identifier.
  • the point control plane network element is the control plane network element 202.
  • the control plane network element 206 sends a context request message to the control plane network element 202.
  • the context request message may carry the first GUTI, or the context request message carries only the anchor control plane network element identifier and the first user temporary identifier.
  • the control plane network element 202 associates with the user context associated with the anchor point control plane network element identifier and the first user temporary identifier index.
  • the control plane network element 202 returns a context response message carrying the retrieved user context to the control plane network element 206.
  • the control plane network element 206 receives the context response message, and establishes a connection relationship with the control plane network element 202 according to the user context carried by the control plane.
  • the control plane network element 206 allocates the second service control plane network element identifier, and the control plane network element 206 generates the second GUTI according to the second service control plane network element, and the method for generating the second GUTI may be: the control plane network element 206
  • the first service control plane network element identifier in the first GUTI is replaced by the second service control plane network element identifier, and the first user temporary identifier and the anchor control plane network element identifier remain unchanged, and the second GUTI is generated after the replacement;
  • the control plane network element indicated by the second service control plane network element identifier has a connection relationship with the radio access network 207 currently connected to the user equipment 200.
  • the control plane network element 206 returns a location update accept message to the radio access network 207, where the location update accept message carries the second GUTI.
  • the radio access network 207 receives the location update accept message sent by the control plane network element 206, and forwards the location update accept message to the user equipment 200.
  • the location update accept message carries the second GUTI.
  • the user equipment 200 receives the location update accept message returned by the radio access network 207, completes the location update process, extracts the second GUTI in the location update accept message, and updates the locally stored first GUTI to the second GUTI.
  • the anchor control plane network element identifier and the user temporary identifier are used as users.
  • Context index after the service control plane network element finds the associated user context from the anchor control plane network element, it does not need to allocate a new user temporary identifier and does not need to indicate the index of the anchor control plane network element to update the user context, further reducing The number of interactions increases the efficiency of getting the user context.
  • FIG. 11 is a schematic diagram of an interaction process of a method for acquiring a user context according to an eighth embodiment of the present invention, which is applicable to the network architecture of FIG. 3.
  • the method includes:
  • the user equipment 300 establishes an RRC connection with the radio access network 302.
  • the user equipment 300 sends an attach request message to the radio access network 302.
  • the attach request message carries an empty control plane network element identifier, and the control plane network element identifier indicates the identity of the control plane network element, and the control plane network element includes the mobility management network. Meta or session management network element.
  • the radio access network 302 selects a service control plane network element according to the load.
  • the radio access network 302 receives the attach request message sent by the user equipment 300. Because the attach request message carries an empty control plane network element identifier, the radio access network 302 cannot select the service control plane network element according to the indication of the attach request message. At this time, the radio access network 1 can select the network element of the service control plane according to the load of the network element of each control plane connected to itself, and the method for selecting may be: the radio access network 1 acquires the network elements of each control plane connected to itself.
  • the load parameter includes one or more of the number of users, the throughput, and the transmission delay.
  • the control plane network element with the lightest load is selected as the service control plane network element according to the load parameter. It is assumed that the service control plane network element selected by the radio access network 302 is the mobility management network element 304.
  • the radio access network 302 sends an attach request message to the selected mobility management network element 304, where the attach request message carries the IMSI of the user equipment 300.
  • the mobility management network element 304 receives the attach request message, and allocates the first service control plane network element identifier and the first user temporary identifier, where the control plane network element represented by the first service control plane network element identifier and the radio access network 302 have Connection relationship.
  • the mobility management network element 304 determines that the associated session management network element 305 is an anchor control plane network element, and sends a session establishment request message to the session management network element 305.
  • the session management network element 305 authenticates the authorized user, assigns an IP address, and instructs the corresponding user plane device 307 to establish a connection to the packet data network 303.
  • the session management network element 305 generates a user context of the user equipment 300, and allocates an anchor control plane.
  • the network element identifier and the first user temporary identifier will be anchored
  • the control plane network element identifier and the first user temporary identifier are used as the context index of the user context, and the anchor control plane network element is identified as the identifier of the session management network element 305.
  • the session management network element 305 returns a session creation success message to the mobility management network element 304.
  • the session creation success message carries the anchor control plane network element identifier and the first user temporary identifier.
  • the mobility management network element 304 receives the session creation success message, allocates the first service control plane network element identifier, and according to the allocated first service control plane network element identifier and the received anchor control plane network element identifier and the first user.
  • the temporary identifier generates a first GUTI, and the first GUTI includes the above three identifiers.
  • the mobility management network element 304 returns an attach receipt message carrying the first GUTI to the radio access network 302.
  • the radio access network 302 receives the attach accept message carrying the first GUTI sent by the mobility management network element 304, and forwards the attach accept message to the user equipment 300.
  • the user equipment 300 receives the attach accept message sent by the radio access network 302, completes the attach procedure, extracts the first GUTI in the attach accept message, and stores the first GUTI locally.
  • S1112 The user equipment 300 sends a location update request message carrying the first GUTI to the radio access network 308.
  • the user equipment 300 needs to select a new radio access network due to mobility or the user equipment 300 reselects the PLMN.
  • the user equipment 300 selects the radio access network 308 to establish an RRC connection, after the RRC connection is established.
  • the user equipment 300 obtains the locally stored first GUTI, and sends a location update request message carrying the first GUTI to the radio access network 308.
  • the first GUTI is a message of the control plane, and the radio access network 308 is invisible to the first GUTI. Therefore, the location update request message also carries a separate first service control plane network element identifier.
  • the radio access network 308 determines a service control plane network element.
  • the radio access network 308 receives the location update request message sent by the user equipment 300, and extracts the first service control plane network element identifier in the location update request message, and the radio access network 308 determines the first service control plane network element identifier. Whether the control plane network element has a connection relationship, and if yes, the control plane network element indicated by the first service control plane network element identifier is selected as the service control plane network element, and if not, the radio access network 308 has The load of the control plane network element of the connection relationship determines the network element of the service control plane. For the method of selection, refer to S303. It is assumed that the service control plane network element determined by the radio access network 308 is the mobility management network element 309.
  • the radio access network 309 sends a location update request to the selected mobility management network element 309.
  • the message, the location update request message carries the first GUTI.
  • the mobility management network element 309 receives the location update request message that is sent by the radio access network 308 and carries the first GUTI, and extracts the anchor control plane network element identifier in the first GUTI, and determines the anchor according to the anchor point control plane network element identifier.
  • the point control plane network element is the session management network element 305.
  • the service control plane network element 309 sends a context request message to the session management network element 305, where the context request message carries the first user temporary identifier.
  • the session management network element 305 obtains its own identity as the anchor control plane network element identifier, and uses the anchor control plane network element identifier and the user temporary identifier as the context index to search for the associated user context.
  • the session management network element 305 returns a context response message to the mobility management network element 309, where the context response message carries the found user context.
  • the mobility management network element 309 receives the context response message, and establishes a connection relationship with the session management network element 305 according to the user context carried therein, and the mobility management network element 309 allocates the second service control plane network element identifier, where the second The service control plane network element identifier identifies the identity of the second service control plane network element, and the second service control plane network element has a connection relationship with the radio access network 308.
  • the mobility management network element 309 generates the second GUTI according to the second serving control plane network element, and the method for generating the second GUTI may be: the mobility management network element 309 replaces the first service control plane network element identifier in the first GUTI with The second service control plane network element identifier, the anchor control plane network element identifier and the first user temporary identifier remain unchanged, and the second GUTI is generated after the replacement.
  • the mobility management network element 309 returns a location update accept message to the radio access network 308, where the location update accept message carries the second GUTI.
  • the radio access network 308 receives the location update accept message carrying the second GUTI returned by the session management network element 309, and forwards the location update accept message to the user equipment 300.
  • the user equipment 300 receives the location update accept message sent by the radio access network 308, completes the location update process, and updates the locally stored first GUTI by using the second GUTI.
  • the anchor control plane network element identifier and the user temporary identifier are used as indexes of the user context, and the service control plane network element does not need to allocate new information after finding the associated user context from the anchor control plane network element.
  • the user temporary identifier and the index that does not need to indicate that the anchor control plane network element updates the user context further reduces the number of interactions and improves the efficiency of acquiring the user context.
  • FIG. 12 is a schematic diagram of interaction of a call method according to an embodiment of the present invention.
  • the anchor control plane network element (control plane network element 202) allocates a temporary identifier of the user, Special processing is required during paging, and the anchor message control plane network element identifier is carried in the paging message to achieve the purpose of uniquely identifying the paging user.
  • the process is as follows:
  • the service control plane network element sends a paging message to the radio access network in the location area list corresponding to the user equipment, where the paging message carries S-TMSI, (Short-Temporary Mobile Subscriber Identity, short temporary user identifier, referred to as S- TMSI), the S-TMSI includes the anchor control plane network element identifier and the user temporary identifier assigned by the anchor control plane network element.
  • S-TMSI Short-Temporary Mobile Subscriber Identity, short temporary user identifier, referred to as S- TMSI
  • the radio access network sends a paging message to the user equipment by using a broadcast channel, where the paging message carries the S-TMSI.
  • the user equipment receives the paging message, determines that the paging object is itself according to the S-TMSI, and establishes an RRC connection with the radio access network.
  • the user equipment After establishing an RRC connection, the user equipment sends a service request message to the radio access network, where the service request message carries the S-TMSI.
  • the radio access network receives the service request message, selects a service control plane network element, and sends a service request message to the selected service control plane network element to execute a corresponding service process.
  • FIG. 13 is a schematic structural diagram of a service control plane network element according to an embodiment of the present invention.
  • the service control plane network element used in the embodiment of the present invention is used to perform the method for acquiring a user context in FIG. 4, and the terminology and The process can be described with reference to the embodiment of FIG. 4.
  • the service control plane network element 13 includes a receiving module 1301 and an obtaining module 1302.
  • the receiving module 1301 is configured to receive a request message sent by the radio access network, where the request message carries a first global unique temporary identifier GUTI, where the first GUTI includes at least a first identifier for identifying the first serving control plane network element.
  • GUTI global unique temporary identifier
  • the obtaining module 1302 is configured to acquire a user context corresponding to the first GUTI.
  • the first GUTI further includes an anchor control plane network element identifier for identifying an anchor control plane network element
  • the obtaining module 1302 is used to:
  • the network element receives the user context returned by the anchor control plane network element.
  • the obtaining module 1302 includes:
  • the search result of the searching unit is yes, acquiring the user context corresponding to the first service control plane network element identifier and the first user temporary identifier.
  • the obtaining module 1302 is further configured to:
  • the acquiring module 1302 is further configured to:
  • context response message carries the second GUTI
  • context response message is used to indicate that the anchor control plane network element update is used to search for the The context index of the user context.
  • the service control plane network element further includes:
  • a returning module configured to return a response message to the radio access network, where the response message carries the second GUTI.
  • the acquiring module 1302 is further configured to:
  • the service control plane network element further includes:
  • a paging module configured to send a paging message to the radio access network, where the paging message carries the anchor control plane network element identifier and the first user temporary identifier.
  • FIG. 14 is another schematic structural diagram of a service control plane network element according to an embodiment of the present invention.
  • the service control plane network element 14 includes a processor 1401, a memory 1402, and a transceiver 1403.
  • the transceiver 1403 is configured to send and receive data with and from an external device.
  • the number of processors 1401 in the service control plane network element 14 may be one or more.
  • the processor 1401, the memory 1402, and the transceiver 1403 may be connected by a bus system or other means.
  • the service control plane network element 14 can be used to perform the method illustrated in FIG. For the meaning and examples of the terms involved in the embodiment, reference may be made to the corresponding embodiment of FIG. I will not repeat them here.
  • the program code is stored in the memory 1402.
  • the processor 1401 is configured to call the program code stored in the memory 1402 to perform the following operations:
  • the request message carries a first global unique temporary identifier GUTI, where the first GUTI includes at least a first serving control plane network element for identifying a first serving control plane network element Identification and first user temporary identification;
  • the first GUTI further includes an anchor control plane network element identifier for identifying an anchor control plane network element
  • the performing, by the processor 1401, the acquiring the user context corresponding to the first GUTI includes:
  • the performing, by the processor 1401, the acquiring a user context corresponding to the first GUTI includes:
  • the user context corresponding to the first service control plane network element identifier and the first user temporary identifier is obtained.
  • the processor 1401 performs the acquiring the user context corresponding to the first GUTI acquisition, and further includes:
  • the processor is further configured to:
  • context response message carries the second GUTI
  • context response message is used to indicate that the anchor control plane network element update is used to search for the The context index of the user context.
  • processor 1401 is further configured to:
  • the processor 1401 is further configured to:
  • processor 1401 is further configured to:
  • FIG. 15 is a schematic structural diagram of an anchor point control plane network element according to an embodiment of the present invention.
  • the anchor point control plane network element used in the embodiment of the present invention is configured to perform the user context search method in FIG. 5, and the terminology involved is used. The process can be described with reference to the embodiment of FIG. 5.
  • the anchor control plane network element 15 includes a first receiving module 1501, a searching module 1502, and a returning module 1503.
  • the first receiving module 1501 is configured to receive a context request message sent by the second serving control plane network element, where the context request message carries a first global unique temporary identifier GUTI, and the first GUTI includes a first user temporary identifier.
  • the searching module 1502 is configured to search for a user context according to the first GUTI.
  • the returning module 1503 is configured to return the user context to the second service control plane network element.
  • the first GUTI further includes a first service control plane network element identifier used to identify the first serving control plane network element;
  • the lookup module 1502 is used to:
  • the first service control plane network element identifier and the first user temporary identifier are used as a context index to search for the user context.
  • the anchor control plane network element and the first service control plane network element are the same network element;
  • the anchor control plane network element 15 further includes:
  • a second receiving module configured to receive a request message sent by the radio access network
  • a creating module configured to allocate an anchor control plane network element identifier for identifying the anchor control plane network element, the first service control plane network element identifier, and the first user temporary identifier, and create the user context Determining, by using the first service control plane network element identifier and the first user temporary identifier as a context index for searching the user context;
  • the first response module is configured to generate the first GUTI, and return a response message carrying the first GUTI to the radio access network, where the response message is used to indicate that the user equipment saves the first GUTI.
  • the anchor control plane network element 15 further includes:
  • a third receiving module configured to receive a context response message sent by the second serving control plane network element, where the context response message carries a second GUTI, and the second GUTI includes the second service control a second service control plane network element identifier of the polygon network element and a second user temporary identifier;
  • An index update module configured to update, according to the second service control plane network element identifier and the second user temporary identifier, the context index used to search for the user context.
  • the anchor control plane network element 15 further includes:
  • a fourth receiving module configured to receive a session establishment request message sent by the first service control plane network element, where the session establishment request message carries the first service control plane network element identifier and the first user temporary identifier;
  • a second creating module configured to create the user context, and use the first service control plane network element identifier and the first user temporary identifier as a context index for searching the user context;
  • a second response module configured to return a session creation success message carrying the control plane network element identifier to the first serving control plane network element, where the session creation success message is used to indicate the first service control plane network element Generating the first GUTI.
  • the first GUTI further includes an anchor control plane network element identifier for identifying the anchor control plane network element
  • the lookup module 1502 is used to:
  • the anchor control plane network element identifier and the first user temporary identifier are used as a context index to search for the user context.
  • anchor control plane network element 1502 and the first service control plane network element are the same network element;
  • the anchor control plane network element 1502 further includes:
  • a fifth receiving module configured to receive a request message sent by the radio access network
  • a third creating module configured to allocate the anchor control plane network element identifier, the first service control plane network element identifier used to identify the first service control plane network element, and the first user temporary identifier, and create a user context, Using the anchor control plane network element identifier and the first user temporary identifier to search for a context index of the user context;
  • a third response module configured to generate the first GUTI, and return a response message carrying the first GUTI to the radio access network, where the response message is used to indicate that the user equipment saves the first GUTI .
  • the anchor control plane network element 15 further includes:
  • a sixth receiving module configured to receive a session establishment request message sent by the first serving control plane network element, where the session establishment request message carries a first service control plane network for identifying a first service control plane network element Meta-identification
  • a fourth creating module configured to create the user context, assign the first user temporary identifier and the anchor control plane network element identifier, and set the anchor control plane network element identifier and the first user temporary Identifying a context index as a lookup for the user context;
  • a fourth response module configured to return a session creation success message to the first service control plane network element, where the session creation success message carries the anchor control plane network element identifier and the first user temporary identifier, The session creation success message is used to instruct the first service control plane network element to create the first GUTI.
  • FIG. 16 is another schematic structural diagram of an anchor point control plane network element according to an embodiment of the present invention.
  • an anchor point control plane network element 16 includes a processor 1601, a memory 1602, and a transceiver 1603. .
  • the transceiver 1603 is configured to transmit and receive data with and from an external device.
  • the number of processors 1601 in the anchor control plane network element 16 may be one or more.
  • the processor 1601, the memory 1602, and the transceiver 1603 may be connected by a bus system or other means.
  • the anchor control plane network element 16 can be used to perform the method illustrated in FIG. For the meaning and examples of the terms involved in the embodiment, reference may be made to the embodiment corresponding to FIG. 5. I will not repeat them here.
  • the program code is stored in the memory 1602.
  • the processor 1601 is configured to call the program code stored in the memory 1602 to perform the following operations:
  • the first GUTI further includes a first service control plane network element identifier used to identify the first serving control plane network element;
  • the processor 1601 performs the searching for the user context according to the first GUTI, including:
  • the first service control plane network element identifier and the first user temporary identifier are used as a context index to search for the user context.
  • the anchor control plane network element and the first service control plane network element are the same network element;
  • the method further includes:
  • the method further includes:
  • the context response message carries a second GUTI
  • the second GUTI includes a second service for identifying the second serving control plane network element Control plane network element identifier and second user temporary identifier
  • the processor 1601 before the processor 1601 performs the receiving the context request message sent by the second serving control plane network element, the processor 1601 is further configured to:
  • a session creation success message carrying the control plane network element identifier; the session creation success message is used to instruct the first serving control plane network element to generate the first GUTI.
  • the first GUTI further includes an anchor control plane network element identifier for identifying the anchor control plane network element
  • the processor 1601 performs the searching for the user context according to the first GUTI, including:
  • the anchor control plane network element and the first service control plane network element are the same network element;
  • the processor 1601 Before the processor 1601 performs the receiving the context request message sent by the second serving control plane network element, the processor 1601 is further configured to:
  • the network element identifier and the first user temporary identifier are used to find a context index of the user context;
  • the processor 1601 before the processor 1601 performs the receiving the context request message sent by the second serving control plane network element, the processor 1601 is further configured to:
  • the session creation success message carries the anchor control plane network element identifier and the first user temporary identifier, where the session creation success message is used
  • the first service control plane network element is instructed to create the first GUTI.
  • the storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).

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  • Mobile Radio Communication Systems (AREA)

Abstract

本申请提供了一种用户上下文获取、查找方法和相关设备,服务控制面网元通过GUIT中携带的锚点控制面网元标识,服务控制面网元可以直接获取用户上下文,建立和锚点控制面网元的连接,避免从旧的服务控制面网元中获取用户上下文,减少了信令交互的次数,提高了获取用户上下文的效率。

Description

一种用户上下文获取、查找方法和相关设备 技术领域
本发明实施例涉及通信领域,尤其涉及一种用户上下文获取、查找方法和相关设备。
背景技术
在3GPP(3rd Generation Partnership Project,第三代合作伙伴计划,简称3GPP)标准版本R8阶段,发展出一种全新的EPC(Evolved Packet Core,简称EPC,演进的分组核心)网络架构,其系统架构如图1所示,包括:用户设备(UE,User Equipment)100、演进的演进陆地无线接入网(E-UTRAN,Evolved Universal Terrestrial Radio Access Network)101、分组数据网络(PDN,Packet Data Network)102、归属用户服务器(HSS,Home Subscriber Server)103、移动性管理实体(MME,Mobility Management Entity)104、用户属性存储器(SPR,Subscription Profile Repository)105、策略和计费规则功能(PCRF,Policy and Charging Rules Function)106、服务网关(S-GW:Serving Gateway)和分组数据网关(P-GW,Packet Data Network Gateway),服务网关包括控制面服务网关107和用户面服务网关108,分组数据网关包括控制面分组数据网关109和用户面分组数据网关110。其中,演进陆地无线接入网101可用于实现所有与演进网络无线有关的功能。移动管理实体104负责控制面的移动性管理,包括用户上下文和移动状态管理,分配用户临时身份标识。例如:GUTI(Globally Unique Temporary Identity,简称GUTI,全局唯一的临时标识)等。归属用户服务器103用于存储用户签约信息。服务网关包括用户面服务网关108和控制面服务网关107,是3GPP接入网络间的转发面锚点,终止演进陆地无线接入网101的接口。分组数据网关包括用户面分组数据网关110和控制面分组数据网关109,是3GPP接入网络和非3GPP接入网络之间的转发面锚点,和外部的分组数据网102连接,负责策略执行和计费。策略和计费规则功能106负责根据签约信息,来自于分组数据网102里业务需求信息,制定QoS(Quality of Service,简称QoS,服务质量)以及计费相关的策略并在分组数 据网关执行,用户属性存储器105用于存储用户QoS和计费相关的签约信息。在EPC网络架构里,服务网关和分组数据网关同时具有控制面和用户面功能,其中控制面功能主要负责建立转发面的承载,维护承载上下文,提供与其他控制面网元或者功能通信的接口。用户面功能主要负责接收针对用户设备100的上下行报文,并根据网关控制面功能的指示,对报文进行转发并执行QoS和统计等操作。在具体实现中,服务网关和分组数据网关一般合一部署。需要说明的是,一旦用户设备100连接到网络并分配IP地址后,用户连接的分组数据网关就会锚定不变,以保证用户设备100的IP地址连续性,这样即使用户设备100因为移动性更换了移动管理实体104和服务网关,由于分组数据网关没有改变,发往用户设备100的报文仍会路由到原先的分组数据网关,分组数据网关在把报文通过用户设备100当前连接的服务网关和通用陆地无线接入网101(例如演进节点)发往用户设备100,从而实现了业务连续性。
在目前的位置更新流程中,当用户设备100由当前的移动管理实体104移动到新的移动管理实体管辖的新的无线接入网时,为了使用户设备100连接到新的无线接入网实现IP连续性,新的移动管理实体需要从用户设备发生位置更新前连接的移动管理实体104和作为IP锚点网关的分组数据网关进行交互获取用户上下文,这种获取用户上下文的方法的交互流程过于繁琐,获取用户上下文的效率低。
发明内容
本发明实施例所要解决的技术问题在于,提供一种用户上下文获取、查找方法和相关设备,可解决现有技术中获取用户上下文的信令过程过于繁琐和获取效率低的问题。
第一方面,本申请提供了一种用户上下文的获取方法,包括:
第二服务控制面网元接收无线接入网发送的请求消息;其中,所述请求消息携带第一全球唯一临时标识GUTI,所述第一GUTI至少包括用于标识第一服务控制面网元的第一服务控制面网元标识和第一用户临时标识;
所述第二服务控制面网元获取与所述第一GUTI对应的用户上下文。
从上述实施例可以看出,服务控制面网元通过GUIT中携带的锚点控制面网元标识,服务控制面网元可以直接获取用户上下文,建立和锚点控制面网元的连接,避免从旧的服务控制面网元中获取用户上下文,减少了信令交互的次数,提高了获取用户上下文的效率。
结合第一方面,在第一种可能的实施方式中,所述第一GUTI还包括用于标识锚点控制面网元的锚点控制面网元标识;
所述第二服务控制面网元获取与第一GUTI对应的用户上下文包括:
所述第二服务控制面网元向所述锚点控制面网元发送携带所述第一GUTI的上下文请求消息;
所述第二服务控制面网元接收所述锚点控制面网元返回的所述用户上下文。
从上述实施例可以看出,通过扩展GUIT中携带的锚点控制面网元标识,服务控制面网元可以直接确定锚点控制面网元,以及从锚点控制面网元中获取用户上下文,建立和锚点控制面网元的连接,避免从旧的服务控制面网元中获取用户上下文,减少了信令交互的次数,提高获取用户上下文的效率。
结合第一方面,在第二种可能的实施方式中,所述第二服务控制面网元获取与所述第一GUTI对应的用户上下文包括:
所述第二服务控制面网元将所述第一服务控制面网元标识和所述第一用户临时标识作为上下文索引在所述第二服务控制面网元查找所述用户上下文;
若查找到所述用户上下文,所述第二服务控制面网元获取与所述第一服务控制面网元标识和所述第一用户临时标识对应的所述用户上下文。
从上述实施例可以看出,在服务控制面网元上存储有用户设备的用户上下文的情况下,用户设备能不需要发送锚点控制面网元标识,节省信令,避免信令流程的冗余,提高了获取用户上下文的效率。
结合第一方面的第二种可能的实施方式,在第三种可能的实施方式中,所述第二服务控制面网元获取与所述第一GUTI获取对应的用户上下文,还包括:
若未查询到所述用户上下文,所述第二服务控制面网元向用户设备请求用于标识锚点控制面网元的锚点控制面网元标识;
所述第二服务控制面网元获取所述锚点控制面网元标识;
所述第二服务控制面网元根据所述锚点控制面网元标识向所述锚点控制面网元发送携带所述第一GUTI的上下文请求消息;
所述第二服务控制面网元接收所述锚点控制面网元返回的所述用户上下文。
结合第一方面的第一或第三种可能的实施方式,在第四种可能的实施方式中所述第二服务控制面网元接收所述锚点控制面网元返回的所述用户上下文之后,还包括:
所述第二服务控制面网元分配第二用户临时标识和用于标识所述第二服务控制面网元的第二服务控制面网元标识;
所述第二服务控制面网元根据所述第二用户临时标识和所述第二服务控制面网元标识生成第二GUTI;
所述第二服务控制面网元向所述锚点控制面网元返回上下文应答消息;其中,所述上下文应答消息携带所述第二GUTI,所述上下文应答消息用于指示所述锚点控制面网元更新用于查找所述用户上下文的所述上下文索引。
结合第一方面的第四种可能的实施方式,在第五种可能的实施方式中,还包括:
所述第二服务控制面网元向所述无线接入网返回响应消息;其中,所述响应消息携带所述第二GUTI。
结合第一方面的第一或第三种可能的实施方式,在第六种可能的实施方式中,所述第二服务控制面网元接收所述锚点控制面网元返回的所述用户上下文之后,还包括:
所述第二服务控制面网元分配用于标识所述第二服务控制面网元的第二服务控制面网元标识,根据所述第二服务控制面网元标识生成第二GUTI;
所述第二服务控制面网元向所述无线接入网返回响应消息,其中,所述接受消息携带所述第二GUTI。
结合第一方面的第一、第三、第四、第五和第六种中任意一种实施方式,在第七种可能的实施方式中,还包括:
所述第二服务控制面网元向所述无线接入网发送寻呼消息;其中,所述寻呼消息携带所述锚点控制面网元标识和所述第一用户临时标识。
第二方面,本申请提供了一种用户上下文查找方法,包括:
锚点控制面网元接收第二服务控制面网元发送的上下文请求消息;其中,所述上下文请求消息携带第一全球唯一临时标识GUTI,所述第一GUTI包括第一用户临时标识;
所述锚点控制面网元根据所述第一GUTI查找用户上下文;
所述锚点控制面网元向所述第二服务控制面网元返回所述用户上下文。
从上述实施例可以看出,锚点控制面网元根据服务控制面网元的请求,直接将用户上下文发送给服务控制面网元,服务控制面网元根据接收的用户上下文建立和锚点控制面网元的连接,避免服务控制面网元从旧的服务控制面网元中获取用户上下文,减少了信令交互的次数,提高获取用户上下文的效率。
结合第二方面,在第一种可能的实施方式中,所述第一GUTI还包括用于标识第一服务控制面网元的第一服务控制面网元标识;
所述锚点控制面网元根据所述第一GUTI查找用户上下文包括:
所述锚点控制面网元将所述第一服务控制面网元标识和第一所述用户临时标识作为上下文索引查找所述用户上下文。
结合第二方面的第一种可能的实施方式,在第二种可能的实施方式中,所述锚点控制面网元和所述第一服务控制面网元为同一网元;
所述锚点控制面网元接收第二服务控制面网元发送的上下文请求消息之前,还包括:
所述锚点控制面网元接收无线接入网发送的请求消息;
所述锚点控制面网元分配用于标识所述锚点控制面网元的锚点控制面网元标识、所述第一服务控制面网元标识和所述第一用户临时标识,创建所述用户上下文,将所述第一服务控制面网元标识和所述第一用户临时标识作为查找所述用户上下文的上下文索引;
所述锚点控制面网元生成所述第一GUTI,向所述无线接入网返回携带所述第一GUTI的响应消息;其中,所述响应消息用于指示用户设备保存所述第一GUTI。
结合第二方面的第一或第二种可能的实施方式,在第三种可能的实施方式中,所述锚点控制面网元向所述服务控制面网元返回所述用户上下文之后,还包括:
所述锚点控制面网元接收所述第二服务控制面网元发送的上下文应答消息;其中,所述上下文应答消息携带第二GUTI,所述第二GUTI包括用于标识所述第二服务控制面网元的第二服务控制面网元标识和第二用户临时标识;
所述锚点控制面网元根据所述第二服务控制面网元标识和所述第二用户临时标识更新用于查找所述用户上下文的所述上下文索引。
结合第二方面的第一种可能的实施方式,在第四种可能的实施方式中,所述锚点控制面网元接收第二服务控制面网元发送的上下文请求消息之前,还包括:
所述锚点控制面网元接收第一服务控制面网元发送的会话建立请求消息;其中,所述会话建立请求消息携带所述第一服务控制面网元标识和所述第一用户临时标识;
所述锚点控制面网元创建所述用户上下文,将所述第一服务控制面网元标识和所述第一用户临时标识作为查找所述用户上下文的上下文索引;
所述锚点控制面网元向所述第一服务控制面网元返回携带所述控制面网元标识的会话创建成功消息;所述会话创建成功消息用于指示所述第一服务控制面网元生成所述第一GUTI。
结合第二方面,在第五种可能的实施方式中,所述第一GUTI还包括用于标识所述锚点控制面网元的锚点控制面网元标识;
所述锚点控制面网元根据所述第一GUTI查找用户上下文包括:
所述锚点控制面网元将所述锚点控制面网元标识和所述第一用户临时标识作为上下文索引查找所述用户上下文。
从上述实施例可以看出,以锚点控制面网元标识和用户临时标识作为用户上下文的索引,服务控制面网元可以从锚点控制面网元查找关联的用户上下文后,锚点控制面网元不需要更新用户上下文的索引,进一步减少了交互的次数,提高的获取用户上下文的效率。
结合第二方面的第五种可能的实施方式,在第六种可能的实施方式中,所述锚点控制面网元和所述第一服务控制面网元为同一网元;
所述锚点控制面网元接收第二服务控制面网元发送的上下文请求消息之前,还包括:
所述锚点控制面网元接收无线接入网发送的请求消息;
所述锚点控制面网元分配所述锚点控制面网元标识、用于标识第一服务控制面网元的第一服务控制面网元标识和所述第一用户临时标识,创建用户上下文,将所述锚点控制面网元标识和所述第一用户临时标识用于查找所述用户上下文的上下文索引;
所述锚点控制面网元生成所述第一GUTI,以及向所述无线接入网返回携带所述第一GUTI的响应消息;其中,所述响应消息用于指示用户设备保存所述第一GUTI。
结合第二方面的第五种可能的实施方式,在第七种可能的实施方式中,所述锚点控制面网元接收第二服务控制面网元发送的上下文请求消息之前,还包括:
所述锚点控制面网元接收所述第一服务控制面网元发送的会话建立请求消息;其中,所述会话建立请求消息携带用于标识第一服务控制面网元的第一服务控制面网元标识;
所述锚点控制面网元创建所述用户上下文,分配所述第一用户临时标识和所述锚点控制面网元标识,以及将所述锚点控制面网元标识和所述第一用户临时标识作为查找所述用户上下文的上下文索引;
所述锚点控制面网元向所述第一服务控制面网元返回会话创建成功消息;其中,所述会话创建成功消息携带所述锚点控制面网元标识和所述第一用户临时标识,所述会话创建成功消息用于指示所述第一服务控制面网元创建所述第一GUTI。
第三方面,本申请提供了一种服务控制面网元,包括:
接收模块,用于接收无线接入网发送的请求消息;其中,所述请求消息携带第一全球唯一临时标识GUTI,所述第一GUTI至少包括用于标识第一服务控制面网元的第一服务控制面网元标识和第一用户临时标识;
获取模块,用于获取与所述第一GUTI对应的用户上下文。
结合第三方面,在第一种可能的实施方式中,所述第一GUTI还包括用于标识锚点控制面网元的锚点控制面网元标识;
所述获取模块用于:
向所述锚点控制面网元发送携带所述第一GUTI的上下文请求消息;
网元接收所述锚点控制面网元返回的所述用户上下文。
结合第三方面,在第二种可能的实施方式中,所述获取模块用于:
将所述第一服务控制面网元标识和所述第一用户临时标识作为上下文索引在所述服务控制面网元查找所述用户上下文;
若所述查找单元的查找结果为是,获取与所述第一服务控制面网元标识和所述第一用户临时标识对应的所述用户上下文。
结合第三方面的第二种可能的实施方式,在第三种可能的实施方式中,所述获取模块还用于:
若未查询到所述用户上下文,向用户设备请求用于标识锚点控制面网元的锚点控制面网元标识;
获取所述锚点控制面网元标识;
根据所述锚点控制面网元标识向所述锚点控制面网元发送携带所述第一GUTI的上下文请求消息;
接收所述锚点控制面网元返回的所述用户上下文。
结合第三方面的第一或第三种可能的实施方式,在第四种可能的实施方式中,所述获取模块执行所述接收所述锚点控制面网元返回的所述用户上下文之后,还用于:
分配第二用户临时标识和用于标识所述服务控制面网元的第二服务控制面网元标识;
根据所述第二用户临时标识和所述第二服务控制面网元标识生成第二GUTI;
向所述锚点控制面网元返回上下文应答消息;其中,所述上下文应答消息携带所述第二GUTI,所述上下文应答消息用于指示所述锚点控制面网元更新用于查找所述用户上下文的所述上下文索引。
结合第三方面的第四种可能的实施方式,在第五种可能的实施方式中,还包括:
返回模块,用于向所述无线接入网返回响应消息;其中,所述响应消息携带所述第二GUTI。
结合第三方面的第一或第三种可能的实施方式,在第六种可能的实施方式中,所述获取模块执行所述接收所述锚点控制面网元返回的所述用户上下文之后,还用于:
分配用于标识所述服务控制面网元的第二服务控制面网元标识,根据所述第二服务控制面网元标识生成第二GUTI;
向所述无线接入网返回响应消息,其中,所述接受消息携带所述第二GUTI。
结合第三方面的第一、第二、第四、第五和第六中的任意一种实施方式,在第七种可能的实施方式中,还包括:
寻呼模块,用于向所述无线接入网发送寻呼消息;其中,所述寻呼消息携带所述锚点控制面网元标识和所述第一用户临时标识。
第四方面,本发明实施例提供了一种锚点控制面网元,包括:
第一接收模块,用于接收第二服务控制面网元发送的上下文请求消息;其中,所述上下文请求消息携带第一全球唯一临时标识GUTI,所述第一GUTI包括第一用户临时标识;
查找模块,用于根据所述第一GUTI查找用户上下文;
返回模块,用于向所述第二服务控制面网元返回所述用户上下文。
结合第四方面,在第一种可能的实施方式中,所述第一GUTI还包括用于标识第一服务控制面网元的第一服务控制面网元标识;
所述查找模块用于:
将所述第一服务控制面网元标识和第一所述用户临时标识作为上下文索引查找所述用户上下文。
结合第四方面的第一种实施方式,在第二种可能的实施方式中,所述锚点控制面网元和所述第一服务控制面网元为同一网元;
所述锚点控制面网元还包括:
第二接收模块,用于接收无线接入网发送的请求消息;
创建模块,用于分配用于标识所述锚点控制面网元的锚点控制面网元标识、所述第一服务控制面网元标识和所述第一用户临时标识,创建所述用户上下文,将所述第一服务控制面网元标识和所述第一用户临时标识作为查找所述用户上下文的上下文索引;
第一响应模块,用于生成所述第一GUTI,向所述无线接入网返回携带所述第一GUTI的响应消息;其中,所述响应消息用于指示用户设备保存所述第一GUTI。
结合第四方面的第一或第二种实施方式,在第三种可能的实施方式中,所述锚点控制面网元还包括:
第三接收模块,用于接收所述第二服务控制面网元发送的上下文应答消息;其中,所述上下文应答消息携带第二GUTI,所述第二GUTI包括用于标识所述第二服务控制面网元的第二服务控制面网元标识和第二用户临时标识;
索引更新模块,用于根据所述第二服务控制面网元标识和所述第二用户临时标识更新用于查找所述用户上下文的所述上下文索引。
结合第四方面的第一种实施方式,在第四种可能的实施方式中,所述锚点控制面网元还包括:
第四接收模块,用于接收第一服务控制面网元发送的会话建立请求消息;其中,所述会话建立请求消息携带所述第一服务控制面网元标识和所述第一用户临时标识;
第二创建模块,用于创建所述用户上下文,将所述第一服务控制面网元标识和所述第一用户临时标识作为查找所述用户上下文的上下文索引;
第二响应模块,用于向所述第一服务控制面网元返回携带所述控制面网元标识的会话创建成功消息;所述会话创建成功消息用于指示所述第一服务控制面网元生成所述第一GUTI。
结合第四方面,在第五种可能的实施方式中,所述第一GUTI还包括用于标识所述锚点控制面网元的锚点控制面网元标识;
所述查找模块用于:
将所述锚点控制面网元标识和所述第一用户临时标识作为上下文索引查找所述用户上下文。
结合第四方面的第五种可能的实施方式,在第六种可能的实施方式中,所述锚点控制面网元和所述第一服务控制面网元为同一网元;
所述锚点控制面网元还包括:
第五接收模块,用于接收无线接入网发送的请求消息;
第三创建模块,用于分配所述锚点控制面网元标识、用于标识第一服务控制面网元的第一服务控制面网元标识和所述第一用户临时标识,创建用户上下文,将所述锚点控制面网元标识和所述第一用户临时标识用于查找所述用户上下文的上下文索引;
第三响应模块,用于生成所述第一GUTI,以及向所述无线接入网返回携带所述第一GUTI的响应消息;其中,所述响应消息用于指示用户设备保存所述第一GUTI。
结合第四方面的第五种可能的实施方式,在第七种可能的实施方式中,所述锚点控制面网元还包括:
第六接收模块,用于接收所述第一服务控制面网元发送的会话建立请求消息;其中,所述会话建立请求消息携带用于标识第一服务控制面网元的第一服务控制面网元标识;
第四创建模块,用于创建所述用户上下文,分配所述第一用户临时标识和所述锚点控制面网元标识,以及将所述锚点控制面网元标识和所述第一用户临时标识作为查找所述用户上下文的上下文索引;
第四响应模块,用于向所述第一服务控制面网元返回会话创建成功消息;其中,所述会话创建成功消息携带所述锚点控制面网元标识和所述第一用户临时标识,所述会话创建成功消息用于指示所述第一服务控制面网元创建所述第一GUTI。
第五方面,本申请提供了一种服务控制面网元,包括:
一个或多个处理器、存储器、总线系统、收发器以及一个或多个程序,所述处理器、所述存储器和所述收发器通过所述总线系统相连;
其中所述一个或多个程序被存储在所述存储器中,所述一个或多个程序包括指令,所述指令当被所述服务控制面网元执行时使所述服务控制面网元执行如第一方面至第一方面的第七种可能的实施方式中任一项所述的方法。
第六方面,本申请提供了一种存储一个或多个程序的计算机可读存储介质,所述一个或多个程序包括指令,所述指令当被服务控制面网元执行时使所述服务控制面网元执行如第一方面至第一方面的第七种可能的实施方式中一项所述方法。
第七方面,本申请提供了一种锚点控制面网元,包括:
一个或多个处理器、存储器、总线系统、收发器以及一个或多个程序,所述处理器、所述存储器和所述收发器通过所述总线系统相连;
其中所述一个或多个程序被存储在所述存储器中,所述一个或多个程序包 括指令,所述指令当被所述锚点控制面网元执行时使所述锚点控制面网元执行如第二方面至第二方面的第七种可能的实施方式中任一项所述的方法。
第八方面,本申请提供了一种存储一个或多个程序的计算机可读存储介质,所述一个或多个程序包括指令,所述指令当被锚点控制面网元执行时使所述锚点控制面网元执行根据第二方面至第二方面的第七种可能的实施方式中任一项所述方法。
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,下面将对实施例中所需要使用的附图作简单地介绍,显而易见地,下面描述中的附图仅仅是本发明的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图获得其他的附图。
图1是现有的EPC网络的结构示意图;
图2是下一代移动通信系统的结构示意图;
图3是下一代移动通信系统的另一结构示意图;
图4是本发明实施例提供的一种用户上下文获取方法的流程示意图;
图5是本发明实施例提供的一种用户上下文查找方法的流程示意图;
图6是本发明第一实施例提供的一种用户上下文获取方法的交互示意图;
图7是本发明第二实施例提供的一种用户上下文获取方法的交互示意图;
图8是本发明第三实施例提供的一种用户上下文获取方法的交互示意图;
图9是本发明第五实施例提供的一种用户上下文获取方法的交互示意图;
图10是本发明第六实施例提供的一种用户上下文获取方法的交互示意图;
图11是本发明第七实施例提供的一种用户上下文获取方法的交互示意图;
图12是本发明实施例提供的一种呼叫方法的交互示意图;
图13是本发明实施例提供的一种服务控制面网元的结构示意图;
图14是本发明实施例提供的一种服务控制面网元的另一结构示意图;
图15是本发明实施例提供的一种锚点控制面网元的结构示意图;
图16是本发明实施例提供的一种锚点控制面网元的另一结构示意图。
具体实施方式
下面将结合本发明实施例中的附图,对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅仅是本发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。
参见图2,为本发明实施例的一种下一代通信系统的结构示意图,下一代通信系统中,服务网关和分组数据网关的控制面功能进一步分离出来,分离出来的控制面功能通过标准的接口控制网关的转发面功能,由于分离出来的控制面功能和现有其他控制面网元(如MME)等存在功能重复,将分离出来的控制面功能和其他控制面网元合并成融合的控制面网元(本申请以下简称控制面网元),以减少功能冗余和减少控制面功能之间的交互。下一代通信系统包括用户设备、至少一个无线接入网、控制面网元、用户面网元、签约数据库和分组数据网,其中,每个控制面网元唯一关联一个用户面网元,每个无线接入网可连接一个或多个控制面网元。无线接入网与具有连接关系的控制面网元之间通过S1-C接口连接;控制面网元与对应的用户面设备2之间通过S18接口连接;用户面设备与具有连接关系的无线接入网之间通过S1-U接口连接。控制面网元用于传输控制,控制面网元融合了多种网络实体的功能。例如,控制面网元具体集成了移动性管理实体MME、控制面服务网关、控制面分组数据网关的功能。控制面网元可用于用户的认证、授权、移动性管理网元、生成转发规则并下发到用户面执行。签约数据库集成了HSS和SPR的功能,多个控制面网元可共有一个签约数据库,多个控制面网元和用户面网元共用一个分组数据网。用户面设备具有可编程的功能,用户面设备用于传输业务数据。
举例说明,下一代通信系统包括:用户设备200、签约数据库201、控制面网元202、分组数据网203、无线接入网204、用户面设备205、控制面网元206、用户面设备208和无线接入网207,位置更新的过程为:用户设备200初始接入无线接入网204,无线接入网204连接的控制面网元202即为服务控制面网元又为锚点控制面网元,即在用户设备300初始接入时服务控制面网元 和锚点控制面网元合一部署,控制面网元202为用户设备200分配IP地址和用户上下文,控制面网元202建立关联的用户面设备205之间的连接。后续由于用户设备200的位置更新移动到无线接入网207管辖的范围内,无线接入网207连接的控制面网元206为服务控制面网元,此时控制面网元206需要获取用户设备200的用户上下文(包括安全上下文信息、承载上下文信息等),从而确保用户设备200能合法接入网络,控制面网元206关联的用户面设备208建立与控制面网元202(锚点控制面网元)的连接,从而实现IP会话的连续性。
参见图3为本发明实施例提供的另一种下一代通信系统的结构示意图,通信系统包括:至少一个无线接入网、移动性管理网元、会话管理网元、用户面设备、分组数据网络、签约数据库和用户设备,每个移动性管理网元关联一个会话管理网元,同时每个移动性管理网元和会话管理网元分别连接一个用户面设备,每个无线接入网可连接一组或多组移动性管理网元和会话管理网元,多个会话管理网元可共用一个签约数据库,多个会话管理网元以及多个会话管理网元关联的用户面设备可共用一个分组数据网。移动性管理网元(MM,Mobility Management,移动性管理网元)和会话管理网元(SM,Session Management,会话管理网元)均为控制面网元,无线接入网与具有连接关系的移动性管理网元之间通过S1-C接口连接,无线接入网与具有连接关系的用户面设备之间通过S1-U接口连接,移动性管理网元与关联的会话管理网元之间通过S11接口连接,会话管理网元与关联的用户面设备之间通过S18接口连接。签约数据库集成了HSS和SPR的功能。移动性管理网元关联的用户面设备和会话管理网元关联的用户面设备具有可编程功能;会话管理网元主要用于认证授权用户、IP地址分配、选择和管理用户面设备;移动性管理网元主要用于移动性管理网元,包括位置更新、寻呼、切换、选择和管理用户面设备。移动性管理网元关联的用户面设备和会话管理网元关联的用户面设备可以合一,例如:连接分组数据网络的用户面设备可以同时连接当前的无线接入网,则两个用户面设备为同一个设备。
在本发明实施例中,下一代通信系统包括:用户设备300、签约数据库301、无线接入网302、分组数据网303、移动性管理网元304、会话管理网元305、 用户面设备306、用户面设备307、无线接入网308、移动性管理网元309、会话管理网元311、用户面设备311和用户面设备312。用户设备300初始连接无线接入网302,无线接入网302连接的移动性管理网元304为服务控制面网元,移动性管理网元304关联的会话管理网元305为锚点控制面网元。后续由于用户设备300的移动性因位置更新移动到无线接入网308的管辖范围内,则无线接入网308连接的移动性管理网元为另一个服务控制面网元。
参见图4,为本发明实施例提供的一种用户上下文获取方法的流程示意图,在本发明实施例中,所述方法包括:
S401、第二服务控制面网元接收无线接入网发送的请求消息;其中,所述请求消息携带第一全球唯一临时标识GUTI,所述第一GUTI至少包括用于标识第一服务控制面网元的第一服务控制面网元标识和第一用户临时标识。
具体的,无线接入网与第二服务控制面网元具有连接关系,请求消息可以是位置更新请求消息,也可以是重附着请求消息;请求消息由用户设备通过无线接入网转发给第二服务控制面网元。请求消息中携带第一服务控制面网元标识和第一用户临时标识,第一服务控制面网元标识用于标识第一服务控制面网元的身份,第一用户临时标识用于标识用户设备上用户的身份,例如:用户临时标识可以是M-TMSI((M-Temporary Mobile Subscriber Identity,临时用户标识,简称M-TMSI)。
S402、所述第二服务控制面网元获取与所述第一GUTI对应的用户上下文
具体的,第二服务控制面网元获取与第一GUTI对应的用户上下文,其中,第二服务控制面网元可在本地获取与第一GUTI对应的用户上下文,或者第二服务控制面网元在其他网元上获取与第一GUTI对应的用户上下文,本发明不作限制。
从上述实施例可以看出,服务控制面网元通过GUIT中携带的锚点控制面网元标识,服务控制面网元可以直接获取用户上下文,建立和锚点控制面网元的连接,避免从旧的服务控制面网元中获取用户上下文,减少了信令交互的次数,提高了获取用户上下文的效率。
可选的,所述第一GUTI还包括用于标识锚点控制面网元的锚点控制面网元标识;
所述第二服务控制面网元获取与第一GUTI对应的用户上下文包括:
所述第二服务控制面网元向所述锚点控制面网元发送携带所述第一GUTI的上下文请求消息;
所述第二服务控制面网元接收所述锚点控制面网元返回的所述用户上下文。
具体的,第一GUTI包括第一服务控制面网元、第一用户临时标识和锚点控制面网元标识,锚点控制面网元标识用于标识锚点控制面网元的身份。第二服务控制面网元获取与第一GUTI对应的用户上下文的方法可以是:第二服务控制面网元向锚点控制面网元发送携带第一GUTI的上下文请求消息,锚点控制面网元接收上下文请求消息,根据上下文请求消息中携带第一GUTI,查找与第一GUTI对应的用户上下文,第二服务控制面网元接收锚点控制面网元返回的用户上下文。
可选的,所述第二服务控制面网元获取与所述第一GUTI对应的用户上下文包括:
所述第二服务控制面网元将所述第一服务控制面网元标识和所述第一用户临时标识作为上下文索引在所述第二服务控制面网元查找所述用户上下文;
若查找到所述用户上下文,所述第二服务控制面网元获取与所述第一服务控制面网元标识和所述第一用户临时标识对应的所述用户上下文。
具体的,用户设备如果是首次连接第二服务控制面网元,第二服务控制面网元设备会根据会在本地存储用户设备的用户上下文,那么用户设备在后续连接第二服务控制面网元时,第二服务控制面网元可直接获取本地存储的用户上下,进行后面的IP连接的流程。基于这种情况,第二服务控制面网元获取与第一GUTI对应的用户上下文可以是:将第一服务控制面网元和第一用户临时标识作为上下文索引在第二服务控制面网元查找用户上下文,若查找到用户上下文,第二服务控制面网元将查找到的用户上下文。
可选的,所述第二服务控制面网元获取与所述第一GUTI获取对应的用户上下文,还包括:
若未查询到所述用户上下文,所述第二服务控制面网元向用户设备请求用于标识锚点控制面网元的锚点控制面网元标识;
所述第二服务控制面网元获取所述锚点控制面网元标识;
所述第二服务控制面网元根据所述锚点控制面网元标识向所述锚点控制面网元发送携带所述第一GUTI的上下文请求消息;
所述第二服务控制面网元接收所述锚点控制面网元返回的所述用户上下文。
具体的,将第一服务控制面网元和第一用户临时标识作为上下文索引在第二服务控制面网元查找用户上下文,若没有查询到用户上下文,第二服务控制面网元向用户设备获取用于标识锚点控制面网元的锚点控制面网元标识,第二服务控制面网元获取用户设备返回的控制面网元标识,第二服务控制面网元标识向锚点控制面网元发送携带第一GUTI的上下文请求消息,锚点控制面网元可根据第一GUTI中携带的第一服务控制面网元标识和第一用户临时标识查找用户上下文,第二服务控制面网元接收锚点控制面网元返回的用户上下文。
可选的,所述第二服务控制面网元接收所述锚点控制面网元返回的所述用户上下文之后,还包括:
所述第二服务控制面网元分配第二用户临时标识和用于标识所述第二服务控制面网元的第二服务控制面网元标识;
所述第二服务控制面网元根据所述第二用户临时标识和所述第二服务控制面网元标识生成第二GUTI;
所述第二服务控制面网元向所述锚点控制面网元返回上下文应答消息;其中,所述上下文应答消息携带所述第二GUTI,所述上下文应答消息用于指示所述锚点控制面网元更新用于查找所述用户上下文的所述上下文索引。
具体的,第二服务控制面网元接收锚点控制面网元返回的用户上下文之后,第二服务控制面网元分配第二用户临时标识和第二服务控制面网元标识,第二服务控制面网元标识用于标识第二服务控制面网元的身份,第二临时标识用于标识用户设备上用户的身份,出于安全性的考虑,每次发生位置更新时,就需要分配新的用户临时标识。第二服务控制面网元根据第二用户临时标识和第二服务控制面网元标识生成第二GUTI的方法可以是:第二服务控制面网元将第一GUTI中的第一用户临时标识替换为第二用户临时标识,第一服务控制面网元标识替换为第二服务控制面网元标识,锚点控制面网元标识保持不变,替换完成后,第一GUTI变更为第二GUTI,即第二GUTI包括第二服务控制面网元标识、锚点控制面网元标识和第二用户临时标识。第二服务控制面网元 向锚点控制面网元返回上下文应答消息,上下文应答消息携带第二GUTI或者上下文应答消息携带第二服务控制面网元标识和第二用户临时标识,上下文应答消息用于指示锚点控制面网元更新用于查找用户上下文的上下文索引。
可选的,还包括:
所述第二服务控制面网元向所述无线接入网返回响应消息;其中,所述响应消息携带所述第二GUTI。
具体的,第二服务控制面网元生成第二GUTI之后,第二服务控制面网元向无线接入网返回响应消息,响应消息与请求消息对应,请求消息为位置更新请求消息时,响应消息为位置更新接收消息;请求消息为重附着请求消息时,响应消息为重附着响应消息。无线接入网向用户设备返回携带第二GUTI的响应消息,用户设备接收响应消息之后,将存储的第一GUTI更新为第二GUTI。
可选的,所述第二服务控制面网元接收所述锚点控制面网元返回的所述用户上下文之后,还包括:
所述第二服务控制面网元分配用于标识所述第二服务控制面网元的第二服务控制面网元标识,根据所述第二服务控制面网元标识生成第二GUTI;
所述第二服务控制面网元向所述无线接入网返回响应消息,其中,所述接受消息携带所述第二GUTI。
具体的,第二服务控制面网元接收锚点控制面网元返回的用户上下文之后,第二服务控制面网元分配第二服务控制面网元标识,第二服务控制面网元标识用于标识第二服务控制面的身份,第二服务控制面网元将第一GUTI中的第一服务控制面网元标识替换为第二服务控制面网元标识,第一用户临时标识和锚点控制面网元标识保持不变,替换完成后第一GUTI变更为第二GUTI,即第二GUTI包括第二服务控制面网元标识、第一用户临时标识和锚点控制面网元标识。第二服务控制面网元向无线接入网返回携带第二GUTI的响应消息,无线接入网向第二GUTI返回给用户设备,用户设备接收到响应消息,将存储的第一GUTI替换为第二GUTI。
可选的,所述方法还包括:
所述第二服务控制面网元向所述无线接入网发送寻呼消息;其中,所述寻呼消息携带所述锚点控制面网元标识和所述第一用户临时标识。
参见图5,为本发明实施例提供的一种用户上下文查找方法的流程示意图,在本发明实施例中,所述方法包括:
S501、锚点控制面网元接收第二服务控制面网元发送的上下文请求消息;其中,所述上下文请求消息携带第一全球唯一临时标识GUTI,所述第一GUTI包括第一用户临时标识。
具体的,第一GUTI用于标识用户设备上用户的身份,出于安全性的考虑,每次发生位置更新时,就需要分配新的用户临时标识。
S502、所述锚点控制面网元根据所述第一GUTI查找用户上下文。
具体的,在用户设备初始接入时,锚点控制面网元存储有用户设备的用户上下文,并建立有第一GUTI与用户上下文的映射关系,锚点控制面网元根据该映射关系查询与第一GUTI对应的用户上下文。
S503、所述锚点控制面网元向所述第二服务控制面网元返回所述用户上下文。
具体的,锚点控制面网元向第二服务控制面网元返回查找的用户上下文,第二服务控制面网元根据用户上下文建立与锚点控制面网元的IP连接,保持IP会话的连续性。
从上述实施例可以看出,锚点控制面网元服务控制面网元发送的携带GUIT的上下文请求消息,直接向用户上下文返回给服务控制面网元,这样服务控制面网元可根据用户上下文建立和锚点控制面网元的连接,避免服务控制面网元从旧的服务控制面网元中获取用户上下文,减少了信令交互的次数,提高了获取用户上下文的效率。
可选的,所述第一GUTI还包括用于标识第一服务控制面网元的第一服务控制面网元标识;
所述锚点控制面网元根据所述第一GUTI查找用户上下文包括:
所述锚点控制面网元将所述第一服务控制面网元标识和第一所述用户临时标识作为上下文索引查找所述用户上下文。
可选的,所述锚点控制面网元和所述第一服务控制面网元为同一网元;
所述锚点控制面网元接收第二服务控制面网元发送的上下文请求消息之前,还包括:
所述锚点控制面网元接收无线接入网发送的请求消息;
所述锚点控制面网元分配用于标识所述锚点控制面网元的锚点控制面网元标识、所述第一服务控制面网元标识和所述第一用户临时标识,创建所述用户上下文,将所述第一服务控制面网元标识和所述第一用户临时标识作为查找所述用户上下文的上下文索引;
所述锚点控制面网元生成所述第一GUTI,向所述无线接入网返回携带所述第一GUTI的响应消息;其中,所述响应消息用于指示用户设备保存所述第一GUTI。
可选的,所述锚点控制面网元向所述服务控制面网元返回所述用户上下文之后,还包括:
所述锚点控制面网元接收所述第二服务控制面网元发送的上下文应答消息;其中,所述上下文应答消息携带第二GUTI,所述第二GUTI包括用于标识所述第二服务控制面网元的第二服务控制面网元标识和第二用户临时标识;
所述锚点控制面网元根据所述第二服务控制面网元标识和所述第二用户临时标识更新用于查找所述用户上下文的所述上下文索引。
可选的,所述锚点控制面网元接收第二服务控制面网元发送的上下文请求消息之前,还包括:
所述锚点控制面网元接收第一服务控制面网元发送的会话建立请求消息;其中,所述会话建立请求消息携带所述第一服务控制面网元标识和所述第一用户临时标识;
所述锚点控制面网元创建所述用户上下文,将所述第一服务控制面网元标识和所述第一用户临时标识作为查找所述用户上下文的上下文索引;
所述锚点控制面网元向所述第一服务控制面网元返回携带所述控制面网元标识的会话创建成功消息;所述会话创建成功消息用于指示所述第一服务控制面网元生成所述第一GUTI。
可选的,所述第一GUTI还包括用于标识所述锚点控制面网元的锚点控制面网元标识;
所述锚点控制面网元根据所述第一GUTI查找用户上下文包括:
所述锚点控制面网元将所述锚点控制面网元标识和所述第一用户临时标识作为上下文索引查找所述用户上下文。
可选的,所述锚点控制面网元和所述第一服务控制面网元为同一网元;
所述锚点控制面网元接收第二服务控制面网元发送的上下文请求消息之前,还包括:
所述锚点控制面网元接收无线接入网发送的请求消息;
所述锚点控制面网元分配所述锚点控制面网元标识、用于标识第一服务控制面网元的第一服务控制面网元标识和所述第一用户临时标识,创建用户上下文,将所述锚点控制面网元标识和所述第一用户临时标识用于查找所述用户上下文的上下文索引;
所述锚点控制面网元生成所述第一GUTI,以及向所述无线接入网返回携带所述第一GUTI的响应消息;其中,所述响应消息用于指示用户设备保存所述第一GUTI。
可选的,所述锚点控制面网元接收第二服务控制面网元发送的上下文请求消息之前,还包括:
所述锚点控制面网元接收所述第一服务控制面网元发送的会话建立请求消息;其中,所述会话建立请求消息携带用于标识第一服务控制面网元的第一服务控制面网元标识;
所述锚点控制面网元创建所述用户上下文,分配所述第一用户临时标识和所述锚点控制面网元标识,以及将所述锚点控制面网元标识和所述第一用户临时标识作为查找所述用户上下文的上下文索引;
所述锚点控制面网元向所述第一服务控制面网元返回会话创建成功消息;其中,所述会话创建成功消息携带所述锚点控制面网元标识和所述第一用户临时标识,所述会话创建成功消息用于指示所述第一服务控制面网元创建所述第一GUTI。
参见图6,为本发明第一实施例提供的一种用户上下文获取方法的交互示意图,适用于图2的网络架构,在本发明实施例中,所述方法包括:
S601、用户设备200与无线接入网204建立RRC连接。
S602、用户设备200向无线接入网204发送附着请求消息,附着请求消息携带空的控制面网元标识,控制面网元标识用于表示控制面网元的身份。
S603、无线接入网204根据与自身连接的各个控制面网元的负载选择服务 控制面网元。
具体的,无线接入网204接收用户设备200发送的附着请求消息,由于附着请求消息中携带的空的控制面网元标识,无线接入网204无法根据附着请求消息的指示选择服务控制面网元,此时无线接入网204可获取与自身具有连接管辖的各个控制面网元的负载参数,负载参数可以为:用户数量、吞吐量和传输时延中的一种或多种,无线接入网204根据负载参数可选择负载最轻的控制面网元作为服务控制面网元,假设选择的服务控制面网元为控制面网元202。需要说明的是,用户设备200为初始接入,服务控制面网元和锚点控制面网元合一部署,此处选择的控制面网元202既为锚点控制面网元又为服务控制面网元。
S604、无线接入网202向控制面网元202发送附着请求消息,附着请求消息携带用户设备200的IMSI(International Mobile Subscriber Identification Number,国际移动用户识别码,简称IMSI)。
S605、控制面网元202完成UE附着流程、认证授权用户、分配IP地址,并控制面网元202指示关联的用户面设备205建立到分组数据网203的连接;控制面网元202创建用户设备200的用户上下文,生成第一GUTI。例如,第一GUTI包括第一服务控制面网元标识、锚点控制面网元标识和用户设备200的第一用户临时标识。上述三种标识可通过GUTI中的字段来实现。控制面网元202将第一服务控制面网元标识和第一用户临时标识作为创建的用户上下文的上下文索引。其中,锚点控制面网元标识表示控制面网元202的身份,此时第一服务控制面网元标识表示控制面网元202的身份,第一服务控制面网元标识标识的服务控制面网元与用户设备200所在的无线接入网204有连接关系,第一用户临时标识用于表示用户设备200当前的身份。在用户设备200此时为初始接入状态,控制面网元202可视为既是锚点控制面网元又是服务控制面网元。
S606、控制面网元202向无线接入网204返回附着接受消息,附着接受消息携带第一GUTI。
S607、无线接入网204接收控制面网元202发送的携带第一GUTI的附着接受消息,向用户设备200转发附着接受消息。
S608、用户设备200接收无线接入网204返回的携带第一GUTI的附着接受消息,在用户设备200的本地存储第一GUTI。
S609、用户设备200向无线接入网207发送位置更新请求消息,位置更新请求消息携带第一GUTI和第一服务控制面网元标识。
例如,当用户设备200发生移动或因为用户设备200重新选择PLMN时,用户设备200需要选择新的无线接入网进行接入,假设用户设备200会选择无线接入网207来建立RRC连接。在建立RRC连接后,用户设备200获取本地存储的第一GUTI,向无线接入网207发送位置更新请求消息。第一GUTI为控制面的消息,无线接入网207对第一GUTI不可见,因此位置更新请求消息中还携带一个单独的第一服务控制面网元标识。
S610、无线接入网207选择服务控制面网元。
具体的,无线接入网207接收携带第一GUTI和第一服务控制面网元标识的位置更新请求消息,提取位置更新请求消息中的第一服务控制面网元标识,判断无线接入网207与第一服务控制面网元标识表示的控制面网元是否有连接关系,如果有连接关系,将第一服务控制面网元标识表示的控制面网元作为服务控制面网元;如果没有连接关系,无线接入网207根据与自身有连接关系的各个控制面网元的负载来选择服务控制面网元,选择的方法可参照S403的描述。假设无线接入网207选择的服务控制面网元为控制面网元206。
S611、无线接入网207向选择的控制面网元206发送携带第一GUTI的位置更新请求消息。
S612、控制面网元206根据锚点控制面网元标识确定锚点控制面网元。
具体的,控制面网元206接收无线接入网207发送的携带第一GUTI的位置更新请求,提取第一GUTI中的锚点控制面网元标识,确定锚点控制面网元标识对应的控制面网元202。
S613、控制面网元206向控制面网元202发送上下文请求消息,上下文请求消息携带第一GUTI。
S614、控制面网元202接收控制面网元206发送的上下文请求消息,提取第一GUTI中的第一服务控制面网元标识和第一用户临时标识,将第一服务控制面网元标识和第一用户临时标识作为上下文索引查找对应的用户上下文。
S615、控制面网元202向控制面网元206返回上下文响应消息,上下文响应消息携带查找的用户上下文。
S616、控制面网元206接收到控制面网元202返回的用户上下文,控制面网元206保存用户上下文,根据用户上下文建立与控制面网元202的连接关系,以及根据用户上下文建立和用户设备200之间的安全信令通道。
S617、控制面网元206分配第二用户临时标识和第二服务控制面网元标识,控制面网元206根据第二用户临时标识和第二服务控制面网元标识生成第二GUTI。生成第二GUTI的方法可以是:控制面网元206将第一GUTI中的第一用户临时标识替换为第二用户临时标识,以及将第一服务控制面网元标识替换为第二服务控制面网元标识,锚点控制面网元标识保持不变,替换后生成第二GUTI,第二GUTI包括第二服务控制面网元标识、锚点控制面网元标识和第二用户临时标识。其中,第二服务控制面网元标识用于标识控制面网元206的身份,用户临时标识可以为M-TMSI,在用户设备200所属的控制面网元发生变化时,用户临时标识相应的发生更新,用户临时标识只在同一个控制面网元内唯一,不同的控制面网元可能分配相同的用户临时标识。
S618、控制面网元206向控制面网元202返回携带第二GUTI的上下文应答消息。
S619、控制面网元202接收上下文应答消息,提取第二GUTI中的第二服务控制面网元标识和第二用户临时标识,更新用户上下文的上下文索引,具体为:将第二服务控制面网元标识和第二用户临时标识作为用户上下文的新的上下文索引。
S620、控制面网元206向无线接入网207返回位置更新接受消息,位置更新接受消息携带第二GUTI。
S621、无线接入网207接收控制面网元206发送的位置更新接受消息,向用户设备200转发位置更新接受消息,位置更新接受消息携带第二GUTI。
S622、用户设备200接收无线接入网207返回的位置更新接受消息,完成位置更新流程,提取位置更新接受消息中的第二GUTI,将本地存储的第一GUTI更新为第二GUTI。
从上述实施例可以看出,通过GUTI中携带的锚点控制面网元标识,服务 控制面网元可以直接确定锚点控制面网元,以及从锚点控制面网元中获取用户上下文,建立和锚点控制面网元的连接,避免服务控制面网元从用户设备位置更新前所属的服务控制面网元中获取用户上下文,减少了信令交互的次数,提高了获取用户上下文的效率。
参见图7,为本发明第二实施例提供的一种用户上下文获取方法的交互示意图,适用于图3的网络架构,在本发明实施例中,所述方法包括:
S701、用户设备300与无线接入网302建立RRC连接。
S702、用户设备300向无线接入网302发送附着请求消息,附着请求消息携带空的控制面网元标识,控制面网元标识表示控制面网元(包括移动性管理网元和会话管理网元)的身份。
S703、无线接入网302根据负载选择服务控制面网元。
具体的,无线接入网302接收用户设备300发送的附着请求消息,由于附着请求消息中携带空的控制面网元标识,无线接入网302无法根据附着请求消息中空的控制面网元标识的指示选择服务控制面网元,此时无线接入网302可根据与自身有连接关系的各个移动性管理网元的负载来选择服务控制面网元,选择的方法可以是:无线接入网302获取与自身有连接关系的各个移动性管理网元的负载参数,负载参数包括用户数量、吞吐量和传输时延中的一种或多种,根据负载参数选择负载最轻的移动性管理网元作为服务控制面网元,假设无线接入网302选择的服务控制面网元为移动性管理网元304。
S704、无线接入网302向选择的移动性管理网元304发送附着请求消息,附着请求消息携带用户设备300的IMSI。
S705、移动性管理网元304接收附着请求消息,分配第一服务控制面网元标识和第一用户临时标识,其中,第一服务控制面网元标识用于标识移动性管理网元304的身份。
S706、移动性管理网元304向会话管理网元305发送会话建立请求消息,会话建立请求消息携带第一服务控制面网元标识和第一用户临时标识。
具体的,移动性管理网元304将关联的会话管理网元305作为锚点控制面网元。
S707、会话管理网元305认证授权用户、分配IP地址、并指示对应的用户面设备307建立到分组数据网络303的连接,会话管理网元305生成用户设备300的用户上下文,将第一服务控制面网元标识和第一用户临时标识作为将用户上下文的上下文索引,会话管理网元305获取自身的标识作为锚点控制面网元标识。
S708、会话管理网元305向移动性管理网元304返回会话创建成功消息,会话创建成功消息携带锚点控制面网元标识。
S709、移动性管理网元304根据分配的第一服务控制面网元标识和第一用户临时标识,以及会话管理网元305发送的锚点会话标识生成第一GUTI。第一GUTI包括第一服务控制面网元标识、锚点控制面网元标识和第一用户临时标识。上述三种标识可通过GUTI的字段实现。移动性管理网元304向无线接入网302返回携带第一GUTI的附着接受消息。
S710、无线接入网302接收移动性管理网元304发送的携带第一GUTI的附着接受消息,向用户设备300转发该附着接受消息。
S711、用户设备300接收无线接入网302发送的附着接受消息,完成附着流程,提取附着接受消息中的第一GUTI,用户设备300在本地存储第一GUTI。
S712、用户设备300向无线接入网308发送携带第一GUTI的位置更新请求消息。
具体的,用户设备300由于移动性或用户设备300重新选择PLMN等原因,需要选择新的无线接入网进行接入,假设用户设备选择无线接入网308建立RRC连接,在RRC连接建立后,用户设备300获取本地存储的第一GUTI,向无线接入网308发送携带第一GUTI的位置更新请求消息,第一GUTI为控制面的消息,无线接入网308对第一GUTI不可见,因此位置更新请求消息中还携带单独的第一服务控制面网元标识。
S713、无线接入网308确定服务控制面网元。
具体的,无线接入网308接收用户设备发送的位置更新请求消息,提取位置更新请求消息中的第一服务控制面网元标识,无线接入网2判断与第一服务控制面网元标识表示的控制面网元是否具有连接关系,若有连接关系,选择第一服务控制面网元标识表示的控制面网元作为服务控制面网元,若没有连接关 系,无线接入网308根据与自身有连接关系的各个控制面网元的负载确定服务控制面网元,选择的方法可参照S503,假设无线接入网308确定的服务控制面网元为移动性管理网元309。
S714、无线接入网308向选择的移动性管理网元309发送位置更新请求消息,位置更新请求消息携带第一GUTI。
S715、移动性管理网元309接收无线接入网308发送的携带第一GUTI的位置更新请求消息,提取第一GUTI中的锚点控制面网元标识,确定锚点控制面网元标识表示会话管理网元305。
S716、移动性管理网元309向会话管理网元305发送上下文请求消息,上下文请求消息携带第一GUTI。
S717、会话管理网元305根据第一服务控制面网元标识和第一用户临时标识索引用户上下文。
具体的,会话管理网元305接收移动性管理网元309发送的携带第一GUTI的上下文请求消息,提取第一GUTI中的第一服务控制面网元标识和第一用户临时标识,将第一服务控制面网元标识和第一用户临时标识作为上下文索引查找对应的用户上下文。
S718、会话管理网元305向移动性管理网元309返回上下文响应消息,上下文响应消息携带查找到的用户上下文。
S719、服务控制面网元309接收会话管理网元305发送的上下文响应消息,根据上下文响应消息中的用户上下文建立与会话管理网元305之间的连接关系,服务控制面网元309分配第二服务控制面网元标识和第二用户临时标识,将第一GUTI中的第一服务控制面网元标识替换为第二服务控制面网元标识,第二服务控制面网元用于标识服务控制面网元309的身份。服务控制面网元309根据第二用户临时标识生成第二GUTI,生成第二GUTI的方法可以是:服务控制面网元309将第一用户临时标识替换为第二用户临时标识,锚点控制面网元标识保持不变,替换操作后生成第二GUTI,第二GUTI包括第二服务控制面网元标识、第二用户临时标识和锚点控制面网元标识。
S720、服务控制面网元309向会话管理网元305返回上下文应答消息,上下文应答消息中携带第二服务控制面网元标识和第二用户临时标识。
S721、会话管理网元305接收服务控制面网元309发送的上下文应答消息,根据上下文应答消息中的第二服务控制面网元标识和第二用户临时标识更新用户上下文的上下文索引。
S722、服务控制面网元309向无线接入网308返回位置更新接受消息,位置更新接受消息携带第二GUTI。
S723、无线接入网308接收服务控制面网元309返回的携带第二GUTI的位置更新接受消息,将该位置更新接受消息转发给用户设备300。
S724、用户设备300接收无线接入网308发送的位置更新接受消息,完成位置更新流程,采用第二GUTI更新本地存储的第一GUTI。
从上述实施例可以看出,通过GUIT中携带的锚点控制面网元标识,服务控制面网元可以直接确定锚点控制面网元,以及从锚点控制面网元中获取用户上下文,建立和锚点控制面网元的连接,避免服务控制面网元从用户设备位置更新前的服务控制面网元中获取用户上下文,减少了信令交互的次数,提高了获取用户上下文的效率。
参见图8,为本发明第三实施例提供的一种用户上下文获取方法的交互流程示意图,适用于图2的网络架构,在本发明实施例中,所述方法包括:
S801、用户设备200与无线接入网204建立RRC连接。
S802、用户设备200向无线接入网204发送附着请求消息,附着请求消息携带空的控制面网元标识。
S803、无线接入网204接收用户设备200发送的附着请求消息,根据与自身连接的各个控制面网元的负载选择目标控制面网元,目标控制面网元既为服务控制面网元又为锚点控制面网元,选择的目标控制面网元为控制面网元202。
S804、无线接入网204向选择的控制面网元202发送附着请求消息,附着请求消息携带用户设备200的IMSI。
S805、控制面网元202完成附着流程,认证授权用户,指示关联的用户面设备205建立与分组数据网络203的连接,控制面网元202创建用户设备200的用户上下文,分配第一服务控制面网元标识、锚点控制面网元标识和第一用 户临时标识,生成第一GUTI,第一GUTI包括第一服务控制面网元标识、锚点控制面网元标识和第一用户临时标识。控制面网元202将第一服务控制面网元标识和第一用户临时标识作为检索用户上下文的上下文索引。
S806、控制面网元202向无线接入网204返回附着请求消息,附着请求消息携带第一GUTI。
S807、无线接入网204接收控制面网元202发送的携带第一GUTI的附着请求消息,向用户设备200转发该附着请求消息。
S808、用户设备200接收无线接入网204发送的附着请求消息,在本地存储附着请求消息中的第一GUTI。
需要说明的是,S801-S808和图6中的S601-S608相同,具体过程可参照图2的描述,此处不再赘述。
S809、用户设备200向无线接入网207发送位置更新请求消息,位置更新请求携带第一GUTI,第一GUTI包括第一服务控制面网元标识和第一用户临时标识,不包括锚点控制面网元标识,由于第一GUTI为控制面的消息,无线接入网207不可见,位置更新请求消息中还携带单独的第一服务控制面网元标识。
S810、无线接入网207接收用户设备200发送的位置更新请求,选择服务控制面网元,假设选择的服务控制面网元为控制面网元206,具体过程可参照图6的S610的描述,此处不再赘述。
S811、无线接入网207向选择的控制面网元206发送位置更新请求消息,位置更新请求消息携带第一GUTI,第一GUTI包括第一服务控制面网元标识和第一用户临时标识,不包括锚点控制面网元标识。
S812、控制面网元206根据第一服务控制面网元标识和第一用户临时标识索引用户上下文,如果用户设备200并非首次接入控制面网元206,控制面网元206可能存储有用户设备200的用户上下文,控制面网元206判断是否检索到第一服务控制面网元标识和第一用户临时标识关联的用户上下文,若检索到,执行S813。
S816、控制面网元206根据用户上下文建立与控制面网元202的连接关系。
可选的,若控制面网元206在S812若未检索到用户上下文,控制面网元 206可通过无线接入网207向用户设备200请求锚点控制面网元标识,在请求到锚点控制面网元标识之后,后续的步骤和图6中的S612-S622相同,具体过程可参照图6中的S612-S622的描述,此处不再赘述。
从上述实施例可以看出,在服务控制面网元上存储有用户设备的用户上下文的情况下,用户设备不需要发送锚点控制面网元标识,节省信令,减少了信令流程的负载度,提供了获取用户上下文的效率。
参见图9,为本发明第五实施例提供的用户上下文获取方法的交互流程图,适用于图3的网络结构,在本发明实施例中,S901-S911和图7中的S701-S711相同,具体过程可参照图7中S701-S711的描述,此处不再赘述;
S912、用户设备300与无线接入网308建立RRC连接后,向无线接入网308发送位置更新请求消息,位置更新请求消息携带第一GUTI,其中第一GUTI包括第一服务控制面网元标识和第一用户临时标识,不包括锚点控制面网元标识。第一GUTI对于无线接入网308不可见,位置更新请求消息中还携带单独的第一服务控制面网元标识。
S913、无线接入网308接收用户设备300发送的位置更新请求消息,提取位置更新请求消息中携带的第一服务控制面网元标识,无线接入网308判断与服务控制面网元标识表示的控制面网元是否有连接关系,如果有连接关系,无线接入网308向服务控制面网元标识表示的控制面网元发送位置更新请求消息;如果没有连接关系,无线接入网308根据与自身有连接关系的各个控制面网元的负载,选择负载最轻的控制面网元作为服务控制面网元,假设无线接入网308选择的服务控制面网元为会话管理网元309。
S914、无线接入网308向会话管理网元309发送位置更新请求消息,位置更新请求消息携带第一GUTI,第一GUTI包括第一服务控制面网元标识和第一用户临时标识,不包括锚点控制面网元标识。
S915、服务控制面网元309接收位置更新请求消息,根据其携带的第一服务控制面网元标识和第一用户临时标识索引关联的用户上下文,若索引到,执行S916。
S916、移动性管理网元309建立与会话管理网元305之间的连接关系。
可选的,若移动性管理网元309根据第一服务控制面网元标识和第一用户临时标识未索引对应的用户上下文,移动性管理网元309可通过无线接入网308向用户设备300请求锚点控制面网元标识,移动性管理网元309在接收到锚点控制面网元标识后,后续执行的步骤和图7中的S715-S724相同,具体过程可参照图7中S715-S724的描述,此处不再赘述。
从上述实施例可以看出,在服务控制面网元上存储有用户设备的用户上下文的情况下,用户设备能不需要发送锚点控制面网元标识,节省信令,避免信令流程的冗余,提高了获取用户上下文的效率。
参见图10,为本发明第七实施例提供的一种用户上下文获取方法的交互流程示意图,适用于图2的网络架构,在本发明实施例中,所述方法包括:
S1001、用户设备200与无线接入网204建立RRC连接。
S1002、用户设备200向无线接入网204发送附着请求消息,附着请求消息携带空的控制面网元标识,控制面网元标识用于表示控制面网元的身份。
S1003、无线接入网204根据与自身连接的各个控制面网元的负载选择目标控制面网元。
具体的,无线接入网204接收用户设备200发送的附着请求消息,由于附着请求消息中携带的空的控制面网元标识,无线接入网204无法根据附着请求消息的指示选择目标控制面网元,此时无线接入网204可获取与自身有连接关系的各个控制面网元的负载参数,负载参数可以为:用户数量、吞吐量和传输时延中的一种或多种,无线接入网204根据负载参数可选择负载最轻的控制面网元作为目标控制面网元,此处用户设备为初始接入,选择的目标控制面网元既为锚点控制面网元又为服务控制面网元,假设无线接入网选择控制面网元202。
S1004、无线接入网204向选择的控制面网元202发送附着请求消息,附着请求消息携带用户设备200的IMSI。
S1005、控制面网元202完成用户设备200附着流程、认证授权用户、分配IP地址,并指示关联的用户面设备205建立到分组数据网络203的连接;控制面网元202创建用户设备200的用户上下文,分配第一服务控制面网元标 识、锚点控制面网元标识和第一用户临时标识,生成第一GUTI,GUTI包括第一服务控制面网元标识、锚点控制面网元标识和第一用户临时标识。上述三种标识可通过第一GUTI中的字段来实现。控制面网元202将锚点控制面网元标识和第一用户临时标识作为创建的用户上下文的上下文索引;其中,锚点控制面网元标识表示控制面网元202的身份,服务控制面网元标识表示与用户设备200所在的无线接入网204有连接关系的控制面网元的身份,第一用户临时标识用于表示用户设备200的当前身份。
S1006、控制面网元202向无线接入网204返回附着接受消息,附着接受消息携带第一GUTI。
S1007、无线接入网204接收控制面网元202发送的携带第一GUTI的附着接受消息,向用户设备200转发附着接受消息。
S1008、用户设备200接收无线接入网204返回的携带第一GUTI的附着接受消息,用户设备200在本地存储第一GUTI。
S1009、用户设备200向无线接入网207发送位置更新请求消息,位置更新请求消息携带第一GUTI。
具体的,由于用户设备200的移动性或用户设备200重新选择PLMN等原因,用户设备需要重新选择新的无线接入网,假设用户设备选择无线接入网207建立RRC连接,在建立RRC连接后,用户设备200获取本地存储的第一GUTI,向无线接入网207发送位置更新请求消息,第一GUTI为控制面的消息,无线接入网207对第一GUTI不可见,因此位置更新请求消息中还携带一个单独的第一服务控制面网元标识。
S1010、无线接入网207选择服务控制面网元。
具体的,无线接入网207接收携带第一GUTI和第一服务控制面网元标识的位置更新请求消息,提取位置更新请求消息中的第一服务控制面网元标识,判断与第一服务控制面网元标识表示的控制面网元是否有连接关系,如果有连接关系,将第一服务控制面网元标识表示控制面网元作为服务控制面网元;如果没有连接关系,无线接入网207根据与自身有连接关系的各个控制面网元的负载来选择服务控制面网元,选择的方法可参照S403的描述。假设无线接入网选择的服务控制面网元为控制面网元206
S1011、无线接入网207向选择的控制面网元206发送携带第一GUTI的位置更新请求消息。
S1012、控制面网元206根据锚点控制面网元标识确定锚点控制面网元。
具体的,控制面网元206接收无线接入网207发送的携带第一GUTI的位置更新请求,提取第一GUTI中的锚点控制面网元标识,确定锚点控制面网元标识表示的锚点控制面网元为控制面网元202。
S1013、控制面网元206向控制面网元202发送上下文请求消息,上下文请求消息可携带第一GUTI,或者上下文请求消息只携带锚点控制面网元标识和第一用户临时标识。
S1014、控制面网元202根据锚点控制面网元标识和第一用户临时标识索引关联的用户上下文。
S1015、控制面网元202向控制面网元206返回携带检索到的用户上下文的上下文响应消息。
S1016、控制面网元206接收上下文响应消息,根据其携带的用户上下文建立与控制面网元202的连接关系。
S1017、控制面网元206分配第二服务控制面网元标识,控制面网元206根据第二服务控制面网元生成第二GUTI,生成第二GUTI的方法可以是:控制面网元206将第一GUTI中的第一服务控制面网元标识替换为第二服务控制面网元标识,第一用户临时标识和锚点控制面网元标识保持不变,替换后生成第二GUTI;其中第二服务控制面网元标识表示的控制面网元与用户设备200当前连接的无线接入网207有连接关系。
S1018、控制面网元206向无线接入网207返回位置更新接受消息,位置更新接受消息携带第二GUTI。
S1019、无线接入网207接收控制面网元206发送的位置更新接受消息,向用户设备200转发位置更新接受消息,位置更新接受消息携带第二GUTI。
S1020、用户设备200接收无线接入网207返回的位置更新接受消息,完成位置更新流程,提取位置更新接受消息中的第二GUTI,将本地存储的第一GUTI更新为第二GUTI。
从上述实施例可以看出,以锚点控制面网元标识和用户临时标识作为用户 上下文的索引,服务控制面网元从锚点控制面网元查找到关联的用户上下文后,不需要分配新的用户临时标识以及不需要指示锚点控制面网元更新用户上下文的索引,进一步减少的交互的次数,提高了获取用户上下文的效率。
参见图11,为本发明第八实施例提供的一种用户上下文获取方法的交互流程示意图,适用于图3的网络架构,在本发明实施例中,所述方法包括:
S1101、用户设备300与无线接入网302建立RRC连接。
S1102、用户设备300向无线接入网302发送附着请求消息,附着请求消息携带空的控制面网元标识,控制面网元标识表示控制面网元的身份,控制面网元包括移动性管理网元或会话管理网元。
S1103、无线接入网302根据负载选择服务控制面网元。
具体的,无线接入网302接收用户设备300发送的附着请求消息,由于附着请求消息中携带空的控制面网元标识,无线接入网302无法根据附着请求消息的指示选择服务控制面网元,此时无线接入网1可根据与自身连接的各个控制面网元的负载来选择服务控制面网元,选择的方法可以是:无线接入网1获取与自身连接的各个控制面网元的负载参数,负载参数包括用户数量、吞吐量和传输时延中的一种或多种,根据负载参数将负载最轻的控制面网元选择为服务控制面网元。假设无线接入网302选择的服务控制面网元为移动性管理网元304。
S1104、无线接入网302向选择的移动性管理网元304发送附着请求消息,附着请求消息携带用户设备300的IMSI。
S1105、移动性管理网元304接收附着请求消息,分配第一服务控制面网元标识和第一用户临时标识,第一服务控制面网元标识表示的控制面网元与无线接入网302具有连接关系。
S1106、移动性管理网元304确定关联的会话管理网元305为锚点控制面网元,向会话管理网元305发送会话建立请求消息。
S1107、会话管理网元305认证授权用户、分配IP地址、并指示对应的用户面设备307建立到分组数据网络303的连接,会话管理网元305生成用户设备300的用户上下文,分配锚点控制面网元标识和第一用户临时标识,将锚点 控制面网元标识和第一用户临时标识作为将用户上下文的上下文索引,锚点控制面网元标识为会话管理网元305的标识。
S1108、会话管理网元305向移动性管理网元304返回会话创建成功消息,会话创建成功消息携带锚点控制面网元标识和第一用户临时标识。
S1109、移动性管理网元304接收会话创建成功消息,分配第一服务控制面网元标识,根据分配的第一服务控制面网元标识以及接收到的锚点控制面网元标识和第一用户临时标识生成第一GUTI,第一GUTI包括上述三种标识。移动性管理网元304向无线接入网302返回携带第一GUTI的附着接收消息。
S1110、无线接入网302接收移动性管理网元304发送的携带第一GUTI的附着接受消息,向用户设备300转发该附着接受消息。
S1111、用户设备300接收无线接入网302发送的附着接受消息,完成附着流程,提取附着接受消息中的第一GUTI,在本地存储第一GUTI。
S1112、用户设备300向无线接入网308发送携带第一GUTI的位置更新请求消息。
具体的,用户设备300由于移动性或用户设备300重新选择PLMN等原因,用户设备300需要选择新的无线接入网,假设用户设备300选择无线接入网308建立RRC连接,在RRC连接建立后,用户设备300获取本地存储的第一GUTI,向无线接入网308发送携带第一GUTI的位置更新请求消息,第一GUTI为控制面的消息,无线接入网308对第一GUTI不可见,因此位置更新请求消息中还携带单独的第一服务控制面网元标识。
S1113、无线接入网308确定服务控制面网元。
具体的,无线接入网308接收用户设备300发送的位置更新请求消息,提取位置更新请求消息中的第一服务控制面网元标识,无线接入网308判断与第一服务控制面网元标识表示的控制面网元是否具有连接关系,若为是,选择第一服务控制面网元标识表示的控制面网元作为服务控制面网元,若为否,无线接入网308根据与自身具有连接关系的控制面网元的负载确定服务控制面网元,选择的方法可参照S303。假设无线接入网308确定的服务控制面网元为移动性管理网元309。
S1114、无线接入网309向选择的移动性管理网元309发送位置更新请求 消息,位置更新请求消息携带第一GUTI。
S1115、移动性管理网元309接收无线接入网308发送的携带第一GUTI的位置更新请求消息,提取第一GUTI中的锚点控制面网元标识,根据锚点控制面网元标识确定锚点控制面网元为会话管理网元305。
S1116、服务控制面网元309向会话管理网元305发送上下文请求消息,上下文请求消息携带第一用户临时标识。
S1117、会话管理网元305获取自身的标识作为锚点控制面网元标识,将锚点控制面网元标识和用户临时标识作为上下文索引查找关联的用户上下文。
S1118、会话管理网元305向移动性管理网元309返回上下文响应消息,上下文响应消息携带查找到的用户上下文。
S1119、移动性管理网元309接收上下文响应消息,根据其中携带的用户上下文建立与会话管理网元305的连接关系,移动性管理网元309分配第二服务控制面网元标识,其中,第二服务控制面网元标识标识第二服务控制面网元的身份,第二服务控制面网元与无线接入网308具有连接关系。移动性管理网元309根据第二服务控制面网元生成第二GUTI,生成第二GUTI的方法可以是:移动性管理网元309将第一GUTI中的第一服务控制面网元标识替换为第二服务控制面网元标识,锚点控制面网元标识和第一用户临时标识保持不变,替换后生成第二GUTI。
S1120、移动性管理网元309向无线接入网308返回位置更新接受消息,位置更新接受消息携带第二GUTI。
S1121、无线接入网308接收会话管理网元309返回的携带第二GUTI的位置更新接受消息,将该位置更新接受消息转发给用户设备300。
S1122、用户设备300接收无线接入网308发送的位置更新接受消息,完成位置更新流程,采用第二GUTI更新本地存储的第一GUTI。
从上述实施例可以看出,以锚点控制面网元标识和用户临时标识作为用户上下文的索引,服务控制面网元从锚点控制面网元查找到关联的用户上下文后,不需要分配新的用户临时标识以及不需要指示锚点控制面网元更新用户上下文的索引,进一步减少了交互的次数,提高了获取用户上下文的效率。
参见图12,为本发明实施例提供的一种呼叫方法的交互示意图,在本发明实施例续图8的实施例,由于锚点控制面网元(控制面网元202)分配用户临时标识,在寻呼时需要做特殊处理,在寻呼消息中携带锚点控制面网元标识,以实现唯一标识寻呼用户的目的,流程如下:
S1201、服务控制面网元向用户设备对应的位置区列表下的无线接入网发送寻呼消息,寻呼消息携带S-TMSI,(Short-Temporary Mobile Subscriber Identity,短临时用户标识,简称S-TMSI),S-TMSI包含锚点控制面网元标识和锚点控制面网元分配的用户临时标识。
S1202、无线接入网通过广播信道向用户设备发送寻呼消息,寻呼消息携带S-TMSI。
S1203、用户设备接收到寻呼消息,根据S-TMSI确定寻呼对象为自身,与无线接入网建立RRC连接。
S1204、建立RRC连接后,用户设备向无线接入网发送业务请求消息,业务请求消息携带S-TMSI。
S1205、无线接入网接收到该业务请求消息,选择服务控制面网元,将业务请求消息发送给选择的服务控制面网元,执行相应的业务流程。
参见图13,为本发明实施例提供的一种服务控制面网元的结构示意图,本发明实施例的服务控制面网元用于执行图4中的用户上下文的获取方法,所涉及的术语和过程可参照图4实施例的描述。服务控制面网元13包括:接收模块1301和获取模块1302。
接收模块1301,用于接收无线接入网发送的请求消息;其中,所述请求消息携带第一全球唯一临时标识GUTI,所述第一GUTI至少包括用于标识第一服务控制面网元的第一服务控制面网元标识和第一用户临时标识。
获取模块1302,用于获取与所述第一GUTI对应的用户上下文。
可选的,所述第一GUTI还包括用于标识锚点控制面网元的锚点控制面网元标识;
获取模块1302用于:
向所述锚点控制面网元发送携带所述第一GUTI的上下文请求消息;
网元接收所述锚点控制面网元返回的所述用户上下文。
可选的,获取模块1302包括:
将所述第一服务控制面网元标识和所述第一用户临时标识作为上下文索引在所述服务控制面网元查找所述用户上下文;
若所述查找单元的查找结果为是,获取与所述第一服务控制面网元标识和所述第一用户临时标识对应的所述用户上下文。
可选的,获取模块1302还用于:
若未查询到所述用户上下文,向用户设备请求用于标识锚点控制面网元的锚点控制面网元标识;
获取所述锚点控制面网元标识;
根据所述锚点控制面网元标识向所述锚点控制面网元发送携带所述第一GUTI的上下文请求消息;
接收所述锚点控制面网元返回的所述用户上下文。
可选的,获取模块1302执行所述接收所述锚点控制面网元返回的所述用户上下文之后,还用于:
分配第二用户临时标识和用于标识所述服务控制面网元的第二服务控制面网元标识;
根据所述第二用户临时标识和所述第二服务控制面网元标识生成第二GUTI;
向所述锚点控制面网元返回上下文应答消息;其中,所述上下文应答消息携带所述第二GUTI,所述上下文应答消息用于指示所述锚点控制面网元更新用于查找所述用户上下文的所述上下文索引。
可选的,服务控制面网元还包括:
返回模块,用于向所述无线接入网返回响应消息;其中,所述响应消息携带所述第二GUTI。
可选的,获取模块1302执行所述接收所述锚点控制面网元返回的所述用户上下文之后,还用于:
分配用于标识所述第二服务控制面网元的服务控制面网元标识,根据所述第二服务控制面网元标识生成第二GUTI;
向所述无线接入网返回响应消息,其中,所述接受消息携带所述第二 GUTI。
可选的,服务控制面网元还包括:
寻呼模块,用于向所述无线接入网发送寻呼消息;其中,所述寻呼消息携带所述锚点控制面网元标识和所述第一用户临时标识。
本发明实施例和图4的方法实施例基于同一构思,其带来的技术效果也相同,具体过程可参照方法实施例一的描述,此处不再赘述。
参见图14,为本发明实施例提供的一种服务控制面网元的另一结构示意图,在本发明实施例中,服务控制面网元14包括处理器1401、存储器1402和收发器1403。收发器1403用于与外部设备之间收发数据。服务控制面网元14中的处理器1401的数量可以是一个或多个。本发明的一些实施例中,处理器1401、存储器1402和收发器1403可通过总线系统或其他方式连接。服务控制面网元14可以用于执行图4所示的方法。关于本实施例涉及的术语的含义以及举例,可以参考图4对应的实施例。此处不再赘述。
其中,存储器1402中存储程序代码。处理器1401用于调用存储器1402中存储的程序代码,用于执行以下操作:
接收无线接入网发送的请求消息;其中,所述请求消息携带第一全球唯一临时标识GUTI,所述第一GUTI至少包括用于标识第一服务控制面网元的第一服务控制面网元标识和第一用户临时标识;
获取与所述第一GUTI对应的用户上下文。
可选的,所述第一GUTI还包括用于标识锚点控制面网元的锚点控制面网元标识;
处理器1401执行所述获取与第一GUTI对应的用户上下文包括:
向所述锚点控制面网元发送携带所述第一GUTI的上下文请求消息;
接收所述锚点控制面网元返回的所述用户上下文。
可选的,处理器1401执行所述获取与所述第一GUTI对应的用户上下文包括:
将所述第一服务控制面网元标识和所述第一用户临时标识作为上下文索引在所述服务控制面网元查找所述用户上下文;
若查找到所述用户上下文,获取与所述第一服务控制面网元标识和所述第一用户临时标识对应的所述用户上下文。
可选的,处理器1401执行所述获取与所述第一GUTI获取对应的用户上下文,还包括:
若未查询到所述用户上下文,向用户设备请求用于标识锚点控制面网元的锚点控制面网元标识;
获取所述锚点控制面网元标识;
根据所述锚点控制面网元标识向所述锚点控制面网元发送携带所述第一GUTI的上下文请求消息;
接收所述锚点控制面网元返回的所述用户上下文。
可选的,处理器执行所述接收所述锚点控制面网元返回的所述用户上下文之后,还用于执行:
分配第二用户临时标识和用于标识所述服务控制面网元的第二服务控制面网元标识;
根据所述第二用户临时标识和所述第二服务控制面网元标识生成第二GUTI;
向所述锚点控制面网元返回上下文应答消息;其中,所述上下文应答消息携带所述第二GUTI,所述上下文应答消息用于指示所述锚点控制面网元更新用于查找所述用户上下文的所述上下文索引。
可选的,处理器1401还用于执行:
向所述无线接入网返回响应消息;其中,所述响应消息携带所述第二GUTI。
可选的,处理器1401执行所述接收所述锚点控制面网元返回的所述用户上下文之后,还用于执行:
分配用于标识所述服务控制面网元的第二服务控制面网元标识,将所述第二服务控制面网元标识替换所述第一服务控制面网元标识后生成第二GUTI;
向所述无线接入网返回响应消息,其中,所述接受消息携带所述第二GUTI。
可选的,处理器1401还用于执行:
向所述无线接入网发送寻呼消息;其中,所述寻呼消息携带所述锚点控制 面网元标识和所述第一用户临时标识。
参见图15,为本发明实施例提供的一种锚点控制面网元的结构示意图,本发明实施例的锚点控制面网元用于执行图5中的用户上下文查找方法,所涉及的术语和过程可参照图5实施例的描述。锚点控制面网元15包括:第一接收模块1501、查找模块1502和返回模块1503。
第一接收模块1501,用于接收第二服务控制面网元发送的上下文请求消息;其中,所述上下文请求消息携带第一全球唯一临时标识GUTI,所述第一GUTI包括第一用户临时标识。
查找模块1502,用于根据所述第一GUTI查找用户上下文。
返回模块1503,用于向所述第二服务控制面网元返回所述用户上下文。
可选的,所述第一GUTI还包括用于标识第一服务控制面网元的第一服务控制面网元标识;
查找模块1502用于:
将所述第一服务控制面网元标识和第一所述用户临时标识作为上下文索引查找所述用户上下文。
可选的,所述锚点控制面网元和所述第一服务控制面网元为同一网元;
锚点控制面网元15还包括:
第二接收模块,用于接收无线接入网发送的请求消息;
创建模块,用于分配用于标识所述锚点控制面网元的锚点控制面网元标识、所述第一服务控制面网元标识和所述第一用户临时标识,创建所述用户上下文,将所述第一服务控制面网元标识和所述第一用户临时标识作为查找所述用户上下文的上下文索引;
第一响应模块,用于生成所述第一GUTI,向所述无线接入网返回携带所述第一GUTI的响应消息;其中,所述响应消息用于指示用户设备保存所述第一GUTI。
可选的,锚点控制面网元15还包括:
第三接收模块,用于接收所述第二服务控制面网元发送的上下文应答消息;其中,所述上下文应答消息携带第二GUTI,所述第二GUTI包括用于标识所述第二服务控制面网元的第二服务控制面网元标识和第二用户临时标识;
索引更新模块,用于根据所述第二服务控制面网元标识和所述第二用户临时标识更新用于查找所述用户上下文的所述上下文索引。
可选的,锚点控制面网元15还包括:
第四接收模块,用于接收第一服务控制面网元发送的会话建立请求消息;其中,所述会话建立请求消息携带所述第一服务控制面网元标识和所述第一用户临时标识;
第二创建模块,用于创建所述用户上下文,将所述第一服务控制面网元标识和所述第一用户临时标识作为查找所述用户上下文的上下文索引;
第二响应模块,用于向所述第一服务控制面网元返回携带所述控制面网元标识的会话创建成功消息;所述会话创建成功消息用于指示所述第一服务控制面网元生成所述第一GUTI。
可选的,所述第一GUTI还包括用于标识所述锚点控制面网元的锚点控制面网元标识;
查找模块1502用于:
将所述锚点控制面网元标识和所述第一用户临时标识作为上下文索引查找所述用户上下文。
可选的,锚点控制面网元1502和所述第一服务控制面网元为同一网元;
锚点控制面网元1502还包括:
第五接收模块,用于接收无线接入网发送的请求消息;
第三创建模块,用于分配所述锚点控制面网元标识、用于标识第一服务控制面网元的第一服务控制面网元标识和所述第一用户临时标识,创建用户上下文,将所述锚点控制面网元标识和所述第一用户临时标识用于查找所述用户上下文的上下文索引;
第三响应模块,用于生成所述第一GUTI,以及向所述无线接入网返回携带所述第一GUTI的响应消息;其中,所述响应消息用于指示用户设备保存所述第一GUTI。
可选的,锚点控制面网元15还包括:
第六接收模块,用于接收所述第一服务控制面网元发送的会话建立请求消息;其中,所述会话建立请求消息携带用于标识第一服务控制面网元的第一服务控制面网元标识;
第四创建模块,用于创建所述用户上下文,分配所述第一用户临时标识和所述锚点控制面网元标识,以及将所述锚点控制面网元标识和所述第一用户临时标识作为查找所述用户上下文的上下文索引;
第四响应模块,用于向所述第一服务控制面网元返回会话创建成功消息;其中,所述会话创建成功消息携带所述锚点控制面网元标识和所述第一用户临时标识,所述会话创建成功消息用于指示所述第一服务控制面网元创建所述第一GUTI。
本发明实施例和图5的方法实施例基于同一构思,其带来的技术效果也相同,具体过程可参照方法实施例二的描述,此处不再赘述。
参见图16,为本发明实施例提供的一种锚点控制面网元的另一结构示意图,在本发明实施例中,锚点控制面网元16包括处理器1601、存储器1602和收发器1603。收发器1603用于与外部设备之间收发数据。锚点控制面网元16中的处理器1601的数量可以是一个或多个。本发明的一些实施例中,处理器1601、存储器1602和收发器1603可通过总线系统或其他方式连接。锚点控制面网元16可以用于执行图5所示的方法。关于本实施例涉及的术语的含义以及举例,可以参考图5对应的实施例。此处不再赘述。
其中,存储器1602中存储程序代码。处理器1601用于调用存储器1602中存储的程序代码,用于执行以下操作:
接收第二服务控制面网元发送的上下文请求消息;其中,所述上下文请求消息携带第一全球唯一临时标识GUTI,所述第一GUTI包括第一用户临时标识;
根据所述第一GUTI查找用户上下文;
向所述第二服务控制面网元返回所述用户上下文。
可选的,所述第一GUTI还包括用于标识第一服务控制面网元的第一服务控制面网元标识;
处理器1601执行所述根据所述第一GUTI查找用户上下文包括:
将所述第一服务控制面网元标识和第一所述用户临时标识作为上下文索引查找所述用户上下文。
可选的,所述锚点控制面网元和所述第一服务控制面网元为同一网元;
处理器1601执行所述接收第二服务控制面网元发送的上下文请求消息之前,还包括:
接收无线接入网发送的请求消息;
分配用于标识所述锚点控制面网元的锚点控制面网元标识、所述第一服务控制面网元标识和所述第一用户临时标识,创建所述用户上下文,将所述第一服务控制面网元标识和所述第一用户临时标识作为查找所述用户上下文的上下文索引;
生成所述第一GUTI,向所述无线接入网返回携带所述第一GUTI的响应消息;其中,所述响应消息用于指示用户设备保存所述第一GUTI。
可选的,处理器1601执行所述向所述服务控制面网元返回所述用户上下文之后,还包括:
接收所述第二服务控制面网元发送的上下文应答消息;其中,所述上下文应答消息携带第二GUTI,所述第二GUTI包括用于标识所述第二服务控制面网元的第二服务控制面网元标识和第二用户临时标识;
根据所述第二服务控制面网元标识和所述第二用户临时标识更新用于查找所述用户上下文的所述上下文索引。
可选的,处理器1601执行所述接收第二服务控制面网元发送的上下文请求消息之前,还用于执行:
接收第一服务控制面网元发送的会话建立请求消息;其中,所述会话建立请求消息携带所述第一服务控制面网元标识和所述第一用户临时标识;
创建所述用户上下文,将所述第一服务控制面网元标识和所述第一用户临时标识作为查找所述用户上下文的上下文索引;
向所述第一服务控制面网元返回携带所述控制面网元标识的会话创建成功消息;所述会话创建成功消息用于指示所述第一服务控制面网元生成所述第一GUTI。
可选的,所述第一GUTI还包括用于标识所述锚点控制面网元的锚点控制面网元标识;
处理器1601执行所述根据所述第一GUTI查找用户上下文包括:
将所述锚点控制面网元标识和所述第一用户临时标识作为上下文索引查 找所述用户上下文。
可选的,所述锚点控制面网元和所述第一服务控制面网元为同一网元;
处理器1601执行所述接收第二服务控制面网元发送的上下文请求消息之前,还用于执行:
接收无线接入网发送的请求消息;
分配所述锚点控制面网元标识、用于标识第一服务控制面网元的第一服务控制面网元标识和所述第一用户临时标识,创建用户上下文,将所述锚点控制面网元标识和所述第一用户临时标识用于查找所述用户上下文的上下文索引;
生成所述第一GUTI,以及向所述无线接入网返回携带所述第一GUTI的响应消息;其中,所述响应消息用于指示用户设备保存所述第一GUTI。
可选的,处理器1601执行所述接收第二服务控制面网元发送的上下文请求消息之前,还用于执行:
接收所述第一服务控制面网元发送的会话建立请求消息;其中,所述会话建立请求消息携带用于标识第一服务控制面网元的第一服务控制面网元标识;
创建所述用户上下文,分配所述第一用户临时标识和所述锚点控制面网元标识,以及将所述锚点控制面网元标识和所述第一用户临时标识作为查找所述用户上下文的上下文索引;
向所述第一服务控制面网元返回会话创建成功消息;其中,所述会话创建成功消息携带所述锚点控制面网元标识和所述第一用户临时标识,所述会话创建成功消息用于指示所述第一服务控制面网元创建所述第一GUTI。
本领域普通技术人员可以理解实现上述实施例方法中的全部或部分流程,是可以通过计算机程序来指令相关的硬件来完成,所述的程序可存储于一计算机可读取存储介质中,该程序在执行时,可包括如上述各方法的实施例的流程。其中,所述的存储介质可为磁碟、光盘、只读存储记忆体(Read-Only Memory,ROM)或随机存储记忆体(Random Access Memory,RAM)等。
以上所揭露的仅为本发明一种较佳实施例而已,当然不能以此来限定本发明之权利范围,本领域普通技术人员可以理解实现上述实施例的全部或部分流程,并依本发明权利要求所作的等同变化,仍属于发明所涵盖的范围。

Claims (30)

  1. 一种用户上下文获取方法,其特征在于,包括:
    第二服务控制面网元接收无线接入网发送的请求消息;其中,所述请求消息携带第一全球唯一临时标识GUTI,所述第一GUTI至少包括用于标识第一服务控制面网元的第一服务控制面网元标识和第一用户临时标识;
    所述第二服务控制面网元获取与所述第一GUTI对应的用户上下文。
  2. 如权利要求1所述的方法,其特征在于,所述第一GUTI还包括用于标识锚点控制面网元的锚点控制面网元标识;
    所述第二服务控制面网元获取与第一GUTI对应的用户上下文包括:
    所述第二服务控制面网元向所述锚点控制面网元发送携带所述第一GUTI的上下文请求消息;
    所述第二服务控制面网元接收所述锚点控制面网元返回的所述用户上下文。
  3. 如权利要求1所述的方法,其特征在于,所述第二服务控制面网元获取与所述第一GUTI对应的用户上下文包括:
    所述第二服务控制面网元将所述第一服务控制面网元标识和所述第一用户临时标识作为上下文索引在所述第二服务控制面网元查找所述用户上下文;
    若查找到所述用户上下文,所述第二服务控制面网元获取与所述第一服务控制面网元标识和所述第一用户临时标识对应的所述用户上下文。
  4. 如权利要求3所述的方法,其特征在于,所述第二服务控制面网元获取与所述第一GUTI获取对应的用户上下文,还包括:
    若未查询到所述用户上下文,所述第二服务控制面网元向用户设备请求用于标识锚点控制面网元的锚点控制面网元标识;
    所述第二服务控制面网元获取所述锚点控制面网元标识;
    所述第二服务控制面网元根据所述锚点控制面网元标识向所述锚点控制 面网元发送携带所述第一GUTI的上下文请求消息;
    所述第二服务控制面网元接收所述锚点控制面网元返回的所述用户上下文。
  5. 如权利要求2或4所述的方法,其特征在于,所述第二服务控制面网元接收所述锚点控制面网元返回的所述用户上下文之后,还包括:
    所述第二服务控制面网元分配第二用户临时标识和用于标识所述第二服务控制面网元的第二服务控制面网元标识;
    所述第二服务控制面网元根据所述第二用户临时标识和所述第二服务控制面网元标识生成第二GUTI;
    所述第二服务控制面网元向所述锚点控制面网元返回上下文应答消息;其中,所述上下文应答消息携带所述第二GUTI,所述上下文应答消息用于指示所述锚点控制面网元更新用于查找所述用户上下文的所述上下文索引。
  6. 如权利要求2或4所述的方法,其特征在于,所述第二服务控制面网元接收所述锚点控制面网元返回的所述用户上下文之后,还包括:
    所述第二服务控制面网元分配用于标识所述第二服务控制面网元的第二服务控制面网元标识,根据所述第二服务控制面网元标识生成第二GUTI;
    所述第二服务控制面网元向所述无线接入网返回响应消息,其中,所述接受消息携带所述第二GUTI。
  7. 一种用户上下文查找方法,其特征在于,包括:
    锚点控制面网元接收第二服务控制面网元发送的上下文请求消息;其中,所述上下文请求消息携带第一全球唯一临时标识GUTI,所述第一GUTI包括第一用户临时标识;
    所述锚点控制面网元根据所述第一GUTI查找用户上下文;
    所述锚点控制面网元向所述第二服务控制面网元返回所述用户上下文。
  8. 如权利要求7所述的方法,其特征在于,所述第一GUTI还包括用于标识第一服务控制面网元的第一服务控制面网元标识;
    所述锚点控制面网元根据所述第一GUTI查找用户上下文包括:
    所述锚点控制面网元将所述第一服务控制面网元标识和第一所述用户临时标识作为上下文索引查找所述用户上下文。
  9. 如权利要求7所述的方法,其特征在于,所述锚点控制面网元和所述第一服务控制面网元为同一网元;
    所述锚点控制面网元接收第二服务控制面网元发送的上下文请求消息之前,还包括:
    所述锚点控制面网元接收无线接入网发送的请求消息;
    所述锚点控制面网元分配用于标识所述锚点控制面网元的锚点控制面网元标识、所述第一服务控制面网元标识和所述第一用户临时标识,创建所述用户上下文,将所述第一服务控制面网元标识和所述第一用户临时标识作为查找所述用户上下文的上下文索引;
    所述锚点控制面网元生成所述第一GUTI,向所述无线接入网返回携带所述第一GUTI的响应消息;其中,所述响应消息用于指示用户设备保存所述第一GUTI。
  10. 如权利要求8或9所述的方法,其特征在于,所述锚点控制面网元向所述服务控制面网元返回所述用户上下文之后,还包括:
    所述锚点控制面网元接收所述第二服务控制面网元发送的上下文应答消息;其中,所述上下文应答消息携带第二GUTI,所述第二GUTI包括用于标识所述第二服务控制面网元的第二服务控制面网元标识和第二用户临时标识;
    所述锚点控制面网元根据所述第二服务控制面网元标识和所述第二用户临时标识更新用于查找所述用户上下文的所述上下文索引。
  11. 如权利要求8所述的方法,其特征在于,所述锚点控制面网元接收第二服务控制面网元发送的上下文请求消息之前,还包括:
    所述锚点控制面网元接收第一服务控制面网元发送的会话建立请求消息;其中,所述会话建立请求消息携带所述第一服务控制面网元标识和所述第一用户临时标识;
    所述锚点控制面网元创建所述用户上下文,将所述第一服务控制面网元标识和所述第一用户临时标识作为查找所述用户上下文的上下文索引;
    所述锚点控制面网元向所述第一服务控制面网元返回携带所述控制面网元标识的会话创建成功消息;所述会话创建成功消息用于指示所述第一服务控制面网元生成所述第一GUTI。
  12. 如权利要求7所述的方法,其特征在于,所述第一GUTI还包括用于标识所述锚点控制面网元的锚点控制面网元标识;
    所述锚点控制面网元根据所述第一GUTI查找用户上下文包括:
    所述锚点控制面网元将所述锚点控制面网元标识和所述第一用户临时标识作为上下文索引查找所述用户上下文。
  13. 如权利要求12所述的方法,其特征在于,所述锚点控制面网元和所述第一服务控制面网元为同一网元;
    所述锚点控制面网元接收第二服务控制面网元发送的上下文请求消息之前,还包括:
    所述锚点控制面网元接收无线接入网发送的请求消息;
    所述锚点控制面网元分配所述锚点控制面网元标识、用于标识第一服务控制面网元的第一服务控制面网元标识和所述第一用户临时标识,创建用户上下文,将所述锚点控制面网元标识和所述第一用户临时标识用于查找所述用户上下文的上下文索引;
    所述锚点控制面网元生成所述第一GUTI,以及向所述无线接入网返回携带所述第一GUTI的响应消息;其中,所述响应消息用于指示用户设备保存所述第一GUTI。
  14. 如权利要求12所述的方法,其特征在于,所述锚点控制面网元接收第二服务控制面网元发送的上下文请求消息之前,还包括:
    所述锚点控制面网元接收所述第一服务控制面网元发送的会话建立请求消息;其中,所述会话建立请求消息携带用于标识第一服务控制面网元的第一服务控制面网元标识;
    所述锚点控制面网元创建所述用户上下文,分配所述第一用户临时标识和所述锚点控制面网元标识,以及将所述锚点控制面网元标识和所述第一用户临时标识作为查找所述用户上下文的上下文索引;
    所述锚点控制面网元向所述第一服务控制面网元返回会话创建成功消息;其中,所述会话创建成功消息携带所述锚点控制面网元标识和所述第一用户临时标识,所述会话创建成功消息用于指示所述第一服务控制面网元创建所述第一GUTI。
  15. 一种服务控制面网元,其特征在于,包括:
    接收模块,用于接收无线接入网发送的请求消息;其中,所述请求消息携带第一全球唯一临时标识GUTI,所述第一GUTI至少包括用于标识第一服务控制面网元的第一服务控制面网元标识和第一用户临时标识;
    获取模块,用于获取与所述第一GUTI对应的用户上下文。
  16. 如权利要求15所述的服务控制面网元,其特征在于,所述第一GUTI还包括用于标识锚点控制面网元的锚点控制面网元标识;
    所述获取模块用于:
    向所述锚点控制面网元发送携带所述第一GUTI的上下文请求消息;
    网元接收所述锚点控制面网元返回的所述用户上下文。
  17. 如权利要求15所述的服务控制面网元,其特征在于,所述获取模块用于:
    将所述第一服务控制面网元标识和所述第一用户临时标识作为上下文索引在所述服务控制面网元查找所述用户上下文;
    若所述查找单元的查找结果为是,获取与所述第一服务控制面网元标识和所述第一用户临时标识对应的所述用户上下文。
  18. 如权利要求17所述的服务控制面网元,其特征在于,所述获取模块还用于:
    若未查询到所述用户上下文,向用户设备请求用于标识锚点控制面网元的 锚点控制面网元标识;
    获取所述锚点控制面网元标识;
    根据所述锚点控制面网元标识向所述锚点控制面网元发送携带所述第一GUTI的上下文请求消息;
    接收所述锚点控制面网元返回的所述用户上下文。
  19. 如权利要求16或18所述的服务控制面网元,其特征在于,所述获取模块执行所述接收所述锚点控制面网元返回的所述用户上下文之后,还用于:
    分配第二用户临时标识和用于标识所述服务控制面网元的第二服务控制面网元标识;
    根据所述第二用户临时标识和所述第二服务控制面网元标识生成第二GUTI;
    向所述锚点控制面网元返回上下文应答消息;其中,所述上下文应答消息携带所述第二GUTI,所述上下文应答消息用于指示所述锚点控制面网元更新用于查找所述用户上下文的所述上下文索引。
  20. 如权利要求19所述的服务控制面网元,其特征在于,还包括:
    返回模块,用于向所述无线接入网返回响应消息;其中,所述响应消息携带所述第二GUTI。
  21. 如权利要求16或18所述的服务控制面网元,其特征在于,所述获取模块执行所述接收所述锚点控制面网元返回的所述用户上下文之后,还用于:
    分配用于标识所述服务控制面网元的第二服务控制面网元标识,根据所述第二服务控制面网元标识生成第二GUTI;
    向所述无线接入网返回响应消息,其中,所述接受消息携带所述第二GUTI。
  22. 如权利要求16、18、19、20和21任意一项所述的服务控制面网元,其特征在于,还包括:
    寻呼模块,用于向所述无线接入网发送寻呼消息;其中,所述寻呼消息携 带所述锚点控制面网元标识和所述第一用户临时标识。
  23. 一种锚点控制面网元,其特征在于,包括:
    第一接收模块,用于接收第二服务控制面网元发送的上下文请求消息;其中,所述上下文请求消息携带第一全球唯一临时标识GUTI,所述第一GUTI包括第一用户临时标识;
    查找模块,用于根据所述第一GUTI查找用户上下文;
    返回模块,用于向所述第二服务控制面网元返回所述用户上下文。
  24. 如权利要求23所述的锚点控制面网元,其特征在于,所述第一GUTI还包括用于标识第一服务控制面网元的第一服务控制面网元标识;
    所述查找模块用于:
    将所述第一服务控制面网元标识和第一所述用户临时标识作为上下文索引查找所述用户上下文。
  25. 如权利要求24所述的锚点控制面网元,其特征在于,所述锚点控制面网元和所述第一服务控制面网元为同一网元;
    所述锚点控制面网元还包括:
    第二接收模块,用于接收无线接入网发送的请求消息;
    创建模块,用于分配用于标识所述锚点控制面网元的锚点控制面网元标识、所述第一服务控制面网元标识和所述第一用户临时标识,创建所述用户上下文,将所述第一服务控制面网元标识和所述第一用户临时标识作为查找所述用户上下文的上下文索引;
    第一响应模块,用于生成所述第一GUTI,向所述无线接入网返回携带所述第一GUTI的响应消息;其中,所述响应消息用于指示用户设备保存所述第一GUTI。
  26. 如权利要求24或25所述的锚点控制面网元,其特征在于,所述锚点控制面网元还包括:
    第三接收模块,用于接收所述第二服务控制面网元发送的上下文应答消 息;其中,所述上下文应答消息携带第二GUTI,所述第二GUTI包括用于标识所述第二服务控制面网元的第二服务控制面网元标识和第二用户临时标识;
    索引更新模块,用于根据所述第二服务控制面网元标识和所述第二用户临时标识更新用于查找所述用户上下文的所述上下文索引。
  27. 如权利要求24所述的锚点控制面网元,其特征在于,所述锚点控制面网元还包括:
    第四接收模块,用于接收第一服务控制面网元发送的会话建立请求消息;其中,所述会话建立请求消息携带所述第一服务控制面网元标识和所述第一用户临时标识;
    第二创建模块,用于创建所述用户上下文,将所述第一服务控制面网元标识和所述第一用户临时标识作为查找所述用户上下文的上下文索引;
    第二响应模块,用于向所述第一服务控制面网元返回携带所述控制面网元标识的会话创建成功消息;所述会话创建成功消息用于指示所述第一服务控制面网元生成所述第一GUTI。
  28. 如权利要求23所述的锚点控制面网元,其特征在于,所述第一GUTI还包括用于标识所述锚点控制面网元的锚点控制面网元标识;
    所述查找模块用于:
    将所述锚点控制面网元标识和所述第一用户临时标识作为上下文索引查找所述用户上下文。
  29. 如权利要求28所述的锚点控制面网元,其特征在于,所述锚点控制面网元和所述第一服务控制面网元为同一网元;
    所述锚点控制面网元还包括:
    第五接收模块,用于接收无线接入网发送的请求消息;
    第三创建模块,用于分配所述锚点控制面网元标识、用于标识第一服务控制面网元的第一服务控制面网元标识和所述第一用户临时标识,创建用户上下文,将所述锚点控制面网元标识和所述第一用户临时标识用于查找所述用户上下文的上下文索引;
    第三响应模块,用于生成所述第一GUTI,以及向所述无线接入网返回携带所述第一GUTI的响应消息;其中,所述响应消息用于指示用户设备保存所述第一GUTI。
  30. 如权利要求28所述的锚点控制面网元,其特征在于,所述锚点控制面网元还包括:
    第六接收模块,用于接收所述第一服务控制面网元发送的会话建立请求消息;其中,所述会话建立请求消息携带用于标识第一服务控制面网元的第一服务控制面网元标识;
    第四创建模块,用于创建所述用户上下文,分配所述第一用户临时标识和所述锚点控制面网元标识,以及将所述锚点控制面网元标识和所述第一用户临时标识作为查找所述用户上下文的上下文索引;
    第四响应模块,用于向所述第一服务控制面网元返回会话创建成功消息;其中,所述会话创建成功消息携带所述锚点控制面网元标识和所述第一用户临时标识,所述会话创建成功消息用于指示所述第一服务控制面网元创建所述第一GUTI。
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