WO2016173296A1 - 一种移动网络分级架构的接入方法及*** - Google Patents

一种移动网络分级架构的接入方法及*** Download PDF

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Publication number
WO2016173296A1
WO2016173296A1 PCT/CN2016/070277 CN2016070277W WO2016173296A1 WO 2016173296 A1 WO2016173296 A1 WO 2016173296A1 CN 2016070277 W CN2016070277 W CN 2016070277W WO 2016173296 A1 WO2016173296 A1 WO 2016173296A1
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gcf
terminal
lcf
access
request
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PCT/CN2016/070277
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English (en)
French (fr)
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宗在峰
袁知贵
姚强
朱进国
吴瑟
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中兴通讯股份有限公司
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
    • H04W8/08—Mobility data transfer
    • H04W8/14—Mobility data transfer between corresponding nodes

Definitions

  • This paper relates to the field of access technology of mobile network hierarchical architecture, and in particular relates to a mobile network hierarchical architecture access method and system.
  • FIG. 1 is a network architecture diagram of a fourth generation mobile communication technology (4G) Evolved Packet System (EPS) of the related art.
  • 4G fourth generation mobile communication technology
  • EPS Evolved Packet System
  • the network architecture of 4G EPS includes:
  • E-UTRAN Evolved UMTS Terrestrial Radio Access Network
  • Mobility Management Entity which is responsible for control plane mobility management, including user context and mobility state management, assigning user temporary identity, etc.
  • SGW Serving Gateway
  • PGW packet data network gateway
  • UE User Equipment
  • PDN packet data network
  • PCRF Policy and Charging Rule Function
  • HSS Home Subscriber Server
  • SGSN Serving GPRS Supporting Node
  • the PGW and the SGW may be combined in one physical entity.
  • LTE-Uu is the interface between the UE and the E-UTRAN
  • S1-MME is the interface between the E-UTRAN and the MME
  • S1-U is the interface between the E-UTRAN and the SGW
  • S3 is The interface between the SGSN and the MME
  • S4 is the interface between the SGSN and the SGW
  • S5 is the interface between the SGW and the PGW
  • S11 is the interface between the MME and the SGW
  • S12 is the UMTS terrestrial radio access network (UTRAN, UMTS) Interface between the Terrestrial Radio Access Network and the SGW
  • SGi is the interface between the PGW and the Carrier Network Protocol (IP) service network
  • Gx is the reference point between the PCRF and the PGW
  • Rx is the PCRF and the carrier IP service network. The reference point between.
  • the MME when the MME is deployed close to the access point location, although the distance of the MME from the access point becomes closer, the access delay is reduced, but since the MME's service range becomes smaller, the tracking area (TA, Tracking) The coverage of the area list is also reduced.
  • TA Tracking Area Update
  • TAU Tracking Area Update
  • the technical problem to be solved by the present invention is to provide a mobile network hierarchical architecture access method and system, which can solve the problem that the access delay of the access signaling from the access point to the core network device in the traditional 4G network is longer and The problem of frequent interaction of signaling.
  • An access method for a mobile network hierarchical architecture comprising:
  • the local control function (LCF) sends a location update request to the global control function (GCF);
  • the GCF allocates a tracking area list and a terminal temporary identifier to the terminal, and sends the tracking area list and the terminal temporary identifier to the LCF.
  • the access request is an attach request or a tracking area update request.
  • the method further includes:
  • the GCF sets the LCF accessed by the terminal to the currently served LCF in the context information of the terminal.
  • the method further includes:
  • the LCF selects a new GCF to serve the terminal.
  • the method further includes:
  • the new GCF acquires context information of the terminal from the last served GCF.
  • the method further includes:
  • the LCF acquires context information of the terminal from the GCF or through the GCF from the last served GCF.
  • the method further includes:
  • the GCF sends the subscription data of the terminal to the LCF.
  • the method further includes:
  • the LCF authenticates the terminal with an authentication vector.
  • the method before the step of the LCF authenticating the terminal by using an authentication vector, the method further includes:
  • the LCF obtains the authentication vector from the GCF or through the GCF from a home network server of the terminal.
  • An access system for a mobile network hierarchical architecture including a Local Control Function (LCF) and a Global Control Function (GCF), wherein:
  • LCF Local Control Function
  • GCF Global Control Function
  • the LCF is configured to: after receiving an access request of the terminal, send a location update request to the GCF;
  • the GCF is configured to: allocate a tracking area list and a terminal temporary identifier to the terminal, and send the tracking area list and the terminal temporary identifier to the LCF.
  • the access request is an attach request or a tracking area update request.
  • the GCF is further configured to: after the LCF sends a location update request to the GCF, before the GCF allocates the tracking area list and the terminal temporary identifier to the terminal, the terminal is accessed in the context information of the terminal.
  • the LCF is set to the LCF of the current service.
  • the LCF is further configured to: after receiving the location request of the terminal, before sending the location update request to the GCF, the GCF corresponding to the GCF identifier of the last service carried by the access request cannot continue to be When the terminal service is described, a new GCF is selected to serve the terminal.
  • the LCF is further configured to: before receiving the location request from the terminal, before sending the location update request to the GCF, when the LCF does not have the context information of the terminal, from the GCF or through the GCF from the last time The serving GCF obtains context information of the terminal.
  • the GCF is further configured to: when the tracking area list and the terminal temporary identifier are sent to the LCF, send the subscription data of the terminal to the LCF.
  • the LCF is further configured to: after receiving the access request of the terminal, use the authentication vector to authenticate the terminal before sending the location update request to the GCF.
  • the LCF is further configured to: before the authenticating the terminal by using an authentication vector, when the LCF does not have a valid authentication vector, from the GCF or through the GCF, from the terminal home network server Obtain the authentication vector.
  • the local control function after receiving the access request of the terminal, the local control function sends a location update request to the global control function; the global control function allocates a tracking area list and a terminal temporary identifier to the terminal, and the tracking area list and the terminal The temporary ID is sent to the local control function.
  • the access request processing function is moved down by the local control function and the global control function, so that the access request of the terminal can be The processing is performed nearby, and frequent signaling interactions are avoided, and the access delay experience is improved without increasing the system signaling overhead.
  • FIG. 1 is a network architecture diagram of a related art 4G EPS
  • FIG. 2 is a schematic diagram of a hierarchical structure of a mobile network according to a preferred embodiment of the present invention
  • FIG. 3 is a schematic diagram of deployment of the architecture shown in FIG. 2;
  • FIG. 4 is a schematic diagram showing the correspondence between LCF and GCF in FIG. 3;
  • FIG. 5 is a flowchart of a method for accessing a mobile network hierarchical architecture according to a preferred embodiment of the present invention
  • FIG. 6 is a flowchart of a UE attaching according to a preferred embodiment of the present invention.
  • FIG. 7 is a flowchart of a UE starting a tracking area update according to a preferred embodiment of the present invention.
  • FIG. 8 is a schematic structural diagram of an access system of a mobile network hierarchical architecture according to a preferred embodiment of the present invention.
  • FIG. 2 is a schematic diagram of a hierarchical structure of a mobile network according to a preferred embodiment of the present invention. As shown in FIG. 2, the hierarchical structure includes the following network elements:
  • the Global Control Function is configured to be responsible for the allocation of the UE temporary identifier (ID, Identity), the allocation of the TA list, the context information of the UE, and the interface with the HSS;
  • the Local Control Function is set to: terminate the network attached storage (NAS) signaling, and is responsible for access authentication, NAS security protection, and participation in the mobility management process.
  • NAS network attached storage
  • the base station is configured to: terminate the air interface with the UE, allocate radio resources to the UE, and provide wireless access to the UE;
  • Packet data network gateway PGW in a traditional 4G network
  • the home network server HSS is configured to: store user subscription data.
  • X1 The interface between the GCFs is set to: pass context information
  • X2 The interface between the LCFs, set to: pass context information when moving across the LCF;
  • X3 The interface between the LCF and the SGW is set to: management of the session and bearer;
  • the interface between the GCF and the LCF is set to: the LCF obtains the user subscription data from the GCF, applies the temporary ID, and the TA list, and transmits the context information between the LCF and the GCF;
  • X5 an interface between the GCF and the HSS, configured to: obtain user subscription data from the HSS, update the current location of the UE to the HSS, and the like;
  • X6 The interface between the LCF and the base station is set to: transfer NAS messages, session management, radio resource management, and the like between the base station and the LCF.
  • FIG. 3 is a schematic diagram of deployment of the architecture shown in FIG. 2.
  • one base station can be connected to multiple LCFs through RRC (Radio Resource Control); one LCF can also be connected to multiple base stations; one GCF corresponds to multiple LCFs; one LCF also corresponds to Multiple GCFs.
  • RRC Radio Resource Control
  • the relationship between the base station and the SGW is a many-to-many relationship, and the relationship between the SGW and the PGW is also a many-to-many relationship.
  • FIG. 4 is a schematic diagram of the correspondence between LCF and GCF in FIG. 3.
  • the LCF and GCF can be grouped, and the functions of the LCF and GCF in the same group are identical.
  • different GCF and/or LCF groups can be planned for different network requirements during network planning to form a virtual private network to serve specific network requirements.
  • one GCF group can plan one or more LCF groups.
  • GCF group 1 is planned to have two LCF groups (LCF group 1 and LCF group 2)
  • GCF group 2 is planned to have two LCF groups (LCF group 3 and LCF group 4).
  • the GCF is deployed in a relatively centralized location, such as a provincial center, where the LCF is deployed close to the base station, such as the regional center. In some scenarios, the LCF can even be deployed in a base station.
  • the TA list and the temporary identity of the UE are allocated by the GCF. Since the location of the GCF is relatively concentrated, the scope governed by the GCF can be large, for example, across the entire province.
  • the setting of the TA list managed by the GCF can also cover a large range, so that the UE does not need to initiate a TAU when moving within a large range, and does not need to replace the temporary identifier.
  • FIG. 5 is a flowchart of a method for accessing a mobile network hierarchical architecture according to a preferred embodiment of the present invention. As shown in FIG. 5, the access method of the mobile network hierarchical architecture provided by the preferred embodiment of the present invention includes the following steps:
  • Step 11 After receiving the access request from the terminal, the local control function sends a location update request to the global control function.
  • the access request is an attach request or a tracking area update request.
  • the method further includes: when the access request carries the global control function of the last service When the global control function corresponding to the identifier cannot continue to serve the terminal, the local control function selects a new global control function to serve the terminal. After the local control function selects a new global control function to serve the terminal, the new global control function acquires the context information of the terminal from the global control function of the last service.
  • the method further includes: when the local control function does not have the context information of the terminal, the local control function is The global control function obtains the context information of the terminal from the global control function of the last service through the global control function.
  • the method further includes: the local control function authenticating the terminal by using the authentication vector. Wherein, when the local control function does not have a valid authentication vector, the local control function acquires the authentication vector from the home network server from the global control function or through the global control function.
  • Step 12 The global control function allocates a tracking area list and a terminal temporary identifier to the terminal, and The tracking area list and the terminal temporary identifier are sent to the local control function.
  • the method further comprises: the global control function setting the local control function of the terminal access to the local control function of the current service in the context information of the terminal.
  • the subscription data of the terminal is also sent to the local control function.
  • FIG. 6 is a flow chart of a UE when it is attached according to a preferred embodiment of the present invention. As shown in Figure 6, the detailed steps are described as follows:
  • Step 101 The UE sends a NAS message attach request to the base station.
  • the NAS message is encapsulated in an RRC message and sent to the base station.
  • the old temporary ID saved by the UE the last accessed GCF (referred to as S-GCF) ID, and the last accessed LCF. (S-LCF for short) is sent to the base station, and in the RRC message, the UE sends the PLMN ID of the selected Public Land Mobile Network (PLMN) to the base station.
  • PLMN Public Land Mobile Network
  • the RRC message may also carry information such as wireless capability information, attributes of the UE, and the like.
  • Step 102 The base station selects an LCF for the attach request of the UE. Specifically, the base station may select the LCF group according to the attribute information and the PLMN ID carried in the RRC message sent by the UE in step 101. If the RRC message sent by the UE does not carry the attribute information, the base station may select the default configured LCF group to serve the UE. After the LCF group is selected, if the LCF group is composed of multiple LCFs, the base station is the UE in the LCF group. Select an LCF to serve the UE. Here, the selected LCF is called Target LCF, referred to as T-LCF.
  • T-LCF Target LCF
  • Step 103 The base station sends a NAS message attach request to the T-LCF, where the attach request carries the temporary ID and Access Point Name (APN) information saved by the UE.
  • the RRC message of the UE also carries other information such as core network capability information, and the base station sends the radio capability information of the UE together with the attach request to the T-LCF.
  • Step 104 The T-LCF determines whether it is necessary to select another LCF for the UE according to the UE's subscription, the capability information of the UE, and other attributes of the UE. If another LCF is selected, the T-LCF sends a redirect request to the base station, and the NAS message is sent. Redirect to the new LCF.
  • the T-LCF selects a GCF for the UE's access, which can be used when selecting the GCF.
  • a GCF for the UE's access
  • the selected GCF is called Target GCF, referred to as T-GCF.
  • Step 105 If there is no context information of the UE in the T-LCF, the T-LCF sends a context request message to the T-GCF to obtain context information of the UE. In the context request message, the T-LCF sends the global temporary ID of the UE and the LCF Code of the last accessed LCF (S-LCF) to the T-GCF.
  • S-LCF LCF Code of the last accessed LCF
  • Step 106 If there is no context information of the UE in the T-GCF, the T-GCF obtains the identifier of the last accessed GCF (S-GCF) from the global temporary identifier of the UE.
  • the global temporary identifier of the UE is: S-GCF Group ID+S-GCF Code+UE Code, where the global identifier of the S-GCF is: S-GCF Group ID+S-GCF Code.
  • the T-GCF acquires context information of the UE from the S-GCF.
  • the S-GCF needs to obtain the context information of the UE from the S-LCF.
  • Step 107 The T-GCF sends the context information of the UE to the T-LCF.
  • the T-GCF sends the information such as the International Mobile Subscriber Identification Number (IMSI) and the authentication vector of the UE to the UE.
  • IMSI International Mobile Subscriber Identification Number
  • T-LCF T-LCF.
  • Step 108 If the T-LCF fails to obtain the valid context information of the UE, the T-LCF sends an ID request message to the UE, requesting the UE to send the IMSI.
  • Step 109 The UE sends an ID response to the T-LCF, and sends the IMSI to the T-LCF.
  • Step 110 If there is no valid authentication vector in the T-LCF, the T-LCF requests an authentication vector from the T-GCF. If there is no valid authentication vector in the T-GCF, the T-GCF acquires the authentication vector of the UE from the HSS. .
  • Step 111 If the T-LCF decides to perform identity authentication on the UE, the T-LCF sends an authentication request to the UE.
  • Step 112 The UE sends an authentication response to the T-LCF.
  • Step 113 The T-LCF sends a location update request message to the T-GCF, and the T-LCF sends the temporary access temporary ID carried by the UE in the attach request, the last allocated TA list, and the like to the T-GCF.
  • Step 114 The T-GCF sets the current serving LCF of the UE to the T-LCF in the context information of the UE.
  • the T-GCF registers the current location of the UE with the HSS, and the T-GCF sends the global identifiers of the T-LCF and the T-GCF to the HSS, and the HSS saves the above information in the context information of the UE.
  • HSS The subscription data of the UE is sent to the T-GCF.
  • the T-GCF decides whether to assign a new temporary ID and TA list to the UE.
  • Step 115 The T-GCF sends a location update response message to the T-LCF, in which the T-GCF sends the new temporary ID and TA list allocated to the UE, and the subscription data of the UE acquired from the HSS to the T- LCF.
  • Step 116 The T-LCF selects the SGW and the PGW for the UE.
  • the T-LCF sends a PDN connection establishment request to the SGW, and sends the PPN information selected by the APN and the T-LCF sent by the UE in the NAS message attach request to the SGW.
  • Step 117 The SGW allocates a tunnel endpoint identifier (TEID) for the bearer required for the PDN connection, and sends a setup session request to the PGW.
  • TEID tunnel endpoint identifier
  • Step 118 The PGW allocates an IP address to the PDN connection of the UE, allocates a TEID to the bearer, and saves the foregoing information, and the TEID, APN, and the like of the SGW received from the SGW, into the context information of the UE.
  • the PGW sends a session establishment response to the SGW, and sends information such as an IP address, a TEID, and an uplink and downlink TFT allocated by the PGW to the SGW.
  • Step 119 The SGW sends a PDN connection setup response to the T-LCF.
  • Step 120 The T-LCF sends an initial UE context setup request to the base station, where the T-LCF carries the Attach Response NAS message to the UE. In the above attach response NAS message, the T-LCF sends the uplink TFT of the UE to the UE.
  • Step 121 The base station allocates the air interface resource to each bearer of the UE, and allocates the air interface resource to the UE through the RRC message, and carries the attach response NAS message to the UE in the RRC message.
  • Step 122 The base station allocates the TEID of the X7 interface to each bearer of the UE, and sends an initial UE context setting response to the T-LCF, and sends the TEID of the X7 interface to the T-LCF.
  • Step 123 The UE sends an attach complete message to the T-LCF.
  • Step 124 The T-LCF sends an update tunnel request to the SGW, and sends the TEID of the X7 interface allocated by the base station to the SGW.
  • Step 125 The SGW sends an update tunnel response to the T-LCF.
  • FIG. 7 is a flow chart of a UE initiating a tracking area update (TAU) according to a preferred embodiment of the present invention.
  • the flow shown in Figure 7 can be used for location updates for periodic location updates and tracking area changes.
  • Tracking area change The changed location update is initiated when the UE moves into an idle area in the idle state and the tracking area is not in the current tracking area list of the UE.
  • the UE does not remove the service range of the currently saved tracking area list.
  • the detailed steps are described as follows:
  • Step 201 The UE sends a NAS message TAU request to the base station (NodeB), and the NAS message is encapsulated in an RRC message and sent to the base station.
  • the UE transmits the saved old temporary ID, the last accessed GCF (S-GCF) ID, and the last accessed LCF (S-LCF) ID to the base station.
  • the UE may also transmit information such as radio capability information, attributes of the UE, and the like.
  • Step 202 The base station selects an LCF for the TAU request of the UE. Specifically, the base station may select an LCF group according to the attribute information carried in the RRC message sent by the UE in step 201 and the LCF type that was accessed last time. After the LCF group is selected, if the LCF group is composed of multiple LCFs, the base station selects an LCF for the UE to serve the UE in the LCF group. Among them, the selected LCF is called Target LCF, referred to as T-LCF.
  • Step 203 The base station sends a NAS message TAU request to the T-LCF.
  • the temporary ID and the TA list saved by the UE are carried in the TAU request message.
  • the base station transmits the radio capability information of the UE together with the TAU request message to the T-LCF.
  • Step 204 If the GCF identified by the last accessed GCF ID carried by the UE in the TAU request cannot continue to serve the UE (for example, the tracking area where the UE is currently located is not within the service range of the last accessed GCF) ), then the T-LCF selects a new GCF for the UE to serve.
  • the GCF information such as capability information, subscription, and the like of the UE may be considered.
  • the selected GCF is called Target GCF, referred to as T-GCF.
  • Step 205 If there is no context information of the UE in the T-LCF, the T-LCF sends a context request message to the T-GCF to obtain context information of the UE. In the context request message, the T-LCF sends the global temporary ID of the UE to the T-GCF.
  • Step 206 If there is no context information of the UE in the T-GCF, the T-GCF obtains the identifier of the last accessed GCF (S-GCF) from the global temporary identifier of the UE.
  • the global temporary identifier of the UE is: S-GCF Group ID+S-GCF Code+UE Code, where the global identifier of the S-GCF is: S-GCF Group ID+S-GCF Code.
  • the T-GCF acquires context information of the UE from the S-GCF.
  • Step 207 The T-GCF sends the context information of the UE to the T-LCF, and the context information of the UE.
  • the T-GCF sends information such as the IMSI and the authentication vector of the UE to the T-LCF.
  • Step 208 If the T-LCF fails to obtain the valid context information of the UE, the T-LCF sends an ID request message to the UE, requesting the UE to send the IMSI.
  • Step 209 The UE sends an ID response to the T-LCF, and sends the IMSI to the T-LCF.
  • Step 210 If there is no valid authentication vector in the T-LCF, the T-LCF requests an authentication vector from the T-GCF. If there is no valid authentication vector in the T-GCF, the T-GCF acquires the authentication vector of the UE from the HSS. .
  • Step 211 If the T-LCF decides to perform identity authentication on the UE, the T-LCF sends an authentication request to the UE.
  • Step 212 The UE sends an authentication response to the T-LCF.
  • Step 213 The T-LCF sends a location update request message to the T-GCF, and the T-LCF brings the temporary access temporary ID carried by the UE in the TAU request, the last allocated TA list, and the like to the T-GCF.
  • Step 214 The T-GCF sets the current serving LCF of the UE to the T-LCF in the context information of the UE, and registers the current location of the UE with the HSS, and the T-GCF sends the global identifiers of the T-LCF and the T-GCF to the T-GCF.
  • the HSS, HSS saves the above information in the context information of the UE.
  • the HSS sends the subscription data of the UE to the T-GCF.
  • the T-GCF decides whether to assign a new temporary ID to the UE and assign a new TA list.
  • Step 215 The T-GCF sends a TAU response message to the T-LCF. If the T-GCF allocates a new temporary ID and a new TA list, the T-GCF allocates the temporary ID and TA list to the UE in the message. And the subscription data of the UE acquired from the HSS is sent to the T-LCF.
  • Step 216 The T-LCF selects an SGW for the UE.
  • the T-LCF sends a session establishment request to the SGW.
  • the session context information of the UE is sent to the SGW.
  • Step 217 The SGW allocates a TEID for each bearer in the UE session context, and sends a session modification request to the corresponding PGW.
  • Step 218 The S5 tunnel TEID received by the PGW from the SGW is saved in the bearer context corresponding to the session of the UE.
  • the PGW sends a session modification response to the SGW.
  • Step 219 The SGW sends a session establishment response to the T-LCF, and sends the X7 interface tunnel TEID allocated by the SGW to the T-LCF.
  • Step 220 The T-LCF sends a TAU accepting NAS message to the UE, and the T-LCF sends the newly allocated UE temporary ID and the TA list to the UE.
  • Step 221 The UE sends a TAU complete message to the T-LCF.
  • the preferred embodiment of the present invention further provides an access system for a mobile network hierarchical architecture, as shown in FIG. 8, including:
  • the local control function 801 is configured to: after receiving the access request of the terminal, send a location update request to the global control function;
  • the global control function 802 is configured to: allocate a tracking area list and a terminal temporary identifier to the terminal, and send the tracking area list and the terminal temporary identifier to the local control function.
  • the access request is an attach request or a tracking area update request.
  • the global control function 802 is further configured to: after the local control function sends the location update request to the global control function, before the global control function allocates the tracking area list and the terminal temporary identifier to the terminal, at the terminal In the context information, the local control function of the terminal access is set as the local control function of the current service.
  • the local control function 801 is further configured to: after receiving the access request of the terminal, before sending the location update request to the global control function, the global control function of the last service carried by the access request When the corresponding global control function cannot continue to serve the terminal, the new global control function is selected to serve the terminal.
  • the local control function 801 is further configured to: after receiving the access request of the terminal, before sending the location update request to the global control function, when the local control function does not have the context information of the terminal, from the global The control function obtains the context information of the terminal from the global control function of the last service through the global control function.
  • the global control function 802 is further configured to: when the tracking area list and the terminal temporary identifier are sent to the local control function, send the subscription data of the terminal to the local control function.
  • the local control function 801 is further configured to: after receiving the access request of the terminal, use the authentication vector to forward the terminal before sending the location update request to the global control function. Line certification.
  • the local control function 801 is further configured to: before the authentication of the terminal by using the authentication vector, when the local control function does not have a valid authentication vector, from the global control function or through the global control function The home network server obtains the authentication vector.
  • the embodiment of the invention also discloses a computer program, comprising program instructions, which when executed by a computer, enable the computer to perform an access method of any of the above mobile network hierarchical architectures.
  • the embodiment of the invention also discloses a carrier carrying the computer program.
  • the local control function after receiving the access request of the terminal, the local control function sends a location update request to the global control function; the global control function allocates a tracking area list and a terminal temporary identifier to the terminal, and the tracking area list and the terminal The temporary ID is sent to the local control function.
  • the access control processing function is moved down by the local control function and the global control function, so that the access request of the terminal can be processed nearby, and frequent signaling interaction is avoided, and the access delay experience is improved without increasing the system information. Make the cost. Therefore, the present invention has strong industrial applicability.

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  • Mobile Radio Communication Systems (AREA)

Abstract

一种移动网络分级架构的接入方法及***，包括：当收到终端的接入请求后，本地控制功能向全局控制功能发送位置更新请求；全局控制功能为所述终端分配跟踪区列表和终端临时标识，并将所述跟踪区列表和终端临时标识发送给本地控制功能。本发明技术方案公开的移动网络分级架构的接入方法及***，能够解决传统4G网络中接入信令从接入点传输至核心网设备存在的接入时延较长及信令频繁交互的问题。

Description

一种移动网络分级架构的接入方法及*** 技术领域
本文涉及移动网络分级架构的接入技术领域，尤其涉及一种移动网络分级架构的接入方法及***。
背景技术
移动通信在二十多年的时间内得到了飞速的发展，给人们的生活方式、工作方式以及社会政治、经济等各方面都带来了巨大的影响。人类社会进入高效的信息化时代，各个方面业务应用需求呈现爆发式增长，给未来无线移动带宽***在频率、技术以及运营等各方面都带来巨大的挑战。
图1为相关技术的***移动通信技术(4G)演进分组***(EPS，Evolved Packet System)的网络架构图。如图1所示，4G EPS的网络架构包括：
演进的UMTS陆地无线接入网(E-UTRAN，Evolved UMTS Terrestrial Radio Access Network)，用于实现所有与演进网络有关的无线功能；
移动管理实体(MME，Mobility Management Entity)，用于负责控制面移动管理，包括用户上下文和移动状态管理，分配用户临时身份标识等；
作为用户面实体的服务网关(SGW，Serving Gateway)，用于负责用户面数据路由处理；
分组数据网网关(PGW，Packet Data Network Gateway)，用于负责用户终端(UE，User Equipment)接入分组数据网(PDN，Packet Data Network)的网关功能；
计费和策略控制实体(PCRF，Policy and Charging Rule Function)，用于策略控制决定和流计费控制功能；
归属网络服务器(HSS，Home Subscriber Server)，用于存储用户签约数据；
服务GPRS支持节点(SGSN，Serving GPRS Supporting Node)。
其中，PGW和SGW可能合设在一个物理实体中。
如图1所示，LTE-Uu为UE与E-UTRAN之间的接口，S1-MME为E-UTRAN与MME之间的接口，S1-U为E-UTRAN与SGW之间的接口，S3为SGSN与MME之间的接口，S4为SGSN与SGW之间的接口，S5为SGW与PGW之间的接口，S11为MME与SGW之间的接口，S12为UMTS陆地无线接入网(UTRAN，UMTS Terrestrial Radio Access Network)与SGW之间的接口，SGi为PGW与运营商网络协议(IP)业务网之间的接口，Gx为PCRF与PGW之间的参考点，Rx为PCRF与运营商IP业务网之间的参考点。
在传统4G网络中，核心网设备(包括MME、SGSN、PGW、SGW等)一般集中部署在省中心，用户接入4G网络时，接入信令需要从接入点发送到离接入点遥远的省中心MME或SGSN进行处理，这种长距离传输增加了接入时延，不能满足第五代移动通信技术(5G)中对低时延的需求。
此外，当把MME部署到靠近接入点位置时，虽然MME离接入点的距离变近了，接入时延减小了，但是，由于MME的服务范围变小，跟踪区(TA，Tracking Area)列表(list)的覆盖范围也变小，UE移动时很容易就移出TA list的覆盖范围，从而导致UE频繁发起跟踪区更新(TAU，Tracking Area Update)流程，使得***信令增加。
发明内容
本发明要解决的技术问题是提供一种移动网络分级架构的接入方法及***，以解决传统4G网络中接入信令从接入点传输至核心网设备存在的接入时延较长及信令频繁交互的问题。
为了达到上述技术目的，采用如下技术方案：
一种移动网络分级架构的接入方法，包括：
当收到终端的接入请求后，本地控制功能(LCF)向全局控制功能(GCF)发送位置更新请求；
所述GCF为所述终端分配跟踪区列表和终端临时标识，并将所述跟踪区列表和终端临时标识发送给所述LCF。
可选地，所述接入请求为附着请求或跟踪区更新请求。
可选地，在所述LCF向GCF发送位置更新请求的步骤之后，所述GCF为所述终端分配跟踪区列表和终端临时标识的步骤之前，该方法还包括：
所述GCF在所述终端的上下文信息中将所述终端接入的LCF设置为当前服务的LCF。
可选地，当收到终端的接入请求的步骤之后，在所述LCF向GCF发送位置更新请求的步骤之前，该方法还包括：
当所述接入请求携带的上次服务的GCF标识对应的GCF无法继续为所述终端服务时，所述LCF选择新的GCF为所述终端服务。
可选地，在所述LCF选择新的GCF为所述终端服务的步骤之后，该方法还包括：
所述新的GCF从上次服务的GCF获取所述终端的上下文信息。
可选地，当收到终端的接入请求的步骤之后，在所述LCF向GCF发送位置更新请求的步骤之前，该方法还包括：
当所述LCF没有所述终端的上下文信息时，所述LCF从所述GCF或通过所述GCF从上次服务的GCF获取所述终端的上下文信息。
可选地，所述GCF将所述跟踪区列表和终端临时标识发送给所述LCF时，该方法还包括：
所述GCF将所述终端的签约数据发送给所述LCF。
可选地，当收到终端的接入请求的步骤之后，在所述LCF向GCF发送位置更新请求的步骤之前，该方法还包括：
所述LCF利用认证向量对所述终端进行认证。
可选地，在所述LCF利用认证向量对所述终端进行认证的步骤之前，该方法还包括：
当所述LCF没有有效的认证向量时，所述LCF从所述GCF或者通过所述GCF从所述终端的归属网络服务器获取所述认证向量。
一种移动网络分级架构的接入***，包括本地控制功能(LCF)和全局控制功能(GCF)，其中：
所述LCF设置成：当收到终端的接入请求后，向所述GCF发送位置更新请求；
所述GCF设置成：为所述终端分配跟踪区列表和终端临时标识，并将所述跟踪区列表和终端临时标识发送给所述LCF。
可选地，所述接入请求为附着请求或跟踪区更新请求。
可选地，所述GCF还设置成：在LCF向GCF发送位置更新请求之后，在GCF为所述终端分配跟踪区列表和终端临时标识之前，在终端的上下文信息中将所述终端接入的LCF设置为当前服务的LCF。
可选地，所述LCF还设置成：当收到终端的接入请求后，向GCF发送位置更新请求之前，当所述接入请求携带的上次服务的GCF标识对应的GCF无法继续为所述终端服务时，选择新的GCF为所述终端服务。
可选地，所述LCF还设置成：当收到终端的接入请求后，向GCF发送位置更新请求之前，当LCF没有终端的上下文信息时，从所述GCF或通过所述GCF从上次服务的GCF获取所述终端的上下文信息。
可选地，所述GCF还设置成：在将所述跟踪区列表和终端临时标识发送给所述LCF时，将所述终端的签约数据发送给所述LCF。
可选地，所述LCF还设置成：当收到终端的接入请求后，在向GCF发送位置更新请求之前，利用认证向量对所述终端进行认证。
可选地，所述LCF还设置成：在利用认证向量对所述终端进行认证之前，当所述LCF没有有效的认证向量时，从所述GCF或者通过所述GCF从所述终端归属网络服务器获取所述认证向量。
在本发明技术方案中，当收到终端的接入请求后，本地控制功能向全局控制功能发送位置更新请求；全局控制功能为终端分配跟踪区列表和终端临时标识，并将跟踪区列表和终端临时标识发送给本地控制功能。通过本地控制功能和全局控制功能将接入请求处理功能下移，使得终端的接入请求可以 就近处理，并且避免了频繁的信令交互，在提升接入时延体验的同时不会增加***信令开销。
附图概述
图1为相关技术的4G EPS的网络架构图；
图2为本发明较佳实施例提供的移动网络分级架构的示意图；
图3为图2所示架构的部署示意图；
图4为图3中LCF与GCF的对应关系示意图；
图5为本发明较佳实施例提供的移动网络分级架构的接入方法的流程图；
图6为本发明较佳实施例中，UE附着时的流程图；
图7为本发明较佳实施例中，UE发起跟踪区更新的流程图；
图8本发明较佳实施例的移动网络分级架构的接入***的结构示意图。
本发明的较佳实施方式
以下是对本文详细描述的主题的概述。本概述并非是为了限制权利要求的保护范围。
以下结合附图对本发明的优选实施例进行详细说明，应当理解，以下所说明的优选实施例仅用于说明和解释本发明，并不用于限定本发明。
图2为本发明较佳实施例提供的移动网络分级架构的示意图。如图2所示，上述分级架构包括以下各网元：
全局控制功能(GCF，Global Control Function)，设置成：负责UE临时标识(ID，Identity)的分配、TA list的分配，保存UE的上下文信息，负责与HSS的接口等；
本地控制功能(LCF，Local Control Function)，设置成：终结网络附属存储(NAS，Network Attached Storage)信令，负责对UE进行接入认证、NAS安全保护、参与移动性管理流程等；
基站，设置成：终结与UE间的空中接口，为UE分配无线资源，为UE提供无线接入等；
传统4G网络中的服务网关SGW；
传统4G网络中的分组数据网网关PGW；
归属网络服务器HSS，设置成：存储用户签约数据。
另外，图2中各接口的说明如下：
X1：GCF间的接口，设置成：传递上下文信息；
X2：LCF间的接口，设置成：在跨LCF移动时传递上下文信息；
X3：LCF与SGW间的接口，设置成：会话和承载的管理；
X4：GCF与LCF间的接口，设置成：LCF向GCF获取用户签约数据、申请临时ID、TA list，在LCF与GCF间传递上下文信息；
X5：GCF与HSS间的接口，设置成：向HSS获取用户签约数据，向HSS更新UE当前位置等；
X6：LCF与基站间的接口，设置成：在基站和LCF间传递NAS消息、会话管理、无线资源管理等。
图3为图2所示架构的部署示意图。如图3所示，在控制面，一个基站通过无线资源控制(RRC，Radio Resource Control)可以和多个LCF相连；一个LCF也可连接多个基站；一个GCF对应多个LCF；一个LCF也对应多个GCF。在用户面，基站与SGW的关系是多对多的关系，SGW与PGW的关系也是多对多的关系。
图4为图3中LCF与GCF的对应关系示意图。如图4所示，可将LCF和GCF分组，同一组中的LCF和GCF的功能完全相同。为了适应5G网络多样性的需求，可在网络规划时为不同的网络需求规划不同的GCF和/或LCF组，组成虚拟专用网络，为特定的网络需求服务。
具体而言，一个GCF组可规划一个或多个LCF组。例如，如图4所示，GCF组1规划有两个LCF组(LCF组1及LCF组2)，GCF组2规划有两个LCF组(LCF组3及LCF组4)。
在如图2所示的架构下，GCF部署在相对集中的位置，如省中心，LCF部署在靠近基站的位置，如区域中心。在某些场景下，LCF甚至可部署在基站中。TA list和UE的临时标识由GCF分配，由于GCF所处的位置相对集中，因此，GCF所管辖的范围可以很大，比如，横跨整个省。由GCF管理的TA list的设置也可以做到覆盖一个大范围，使得UE在大范围内移动时无需发起TAU，也不需要更换临时标识。
图5为本发明较佳实施例提供的移动网络分级架构的接入方法的流程图。如图5所示，本发明较佳实施例提供的移动网络分级架构的接入方法包括以下步骤：
步骤11：当收到终端的接入请求后，本地控制功能向全局控制功能发送位置更新请求。
在本实施例中，接入请求为附着请求或跟踪区更新请求。
在一实施例中，当收到终端的接入请求后，在本地控制功能向全局控制功能发送位置更新请求之前，该方法还包括：当所述接入请求携带的上次服务的全局控制功能标识对应的全局控制功能无法继续为所述终端服务时，本地控制功能选择新的全局控制功能为所述终端服务。其中，在本地控制功能选择新的全局控制功能为所述终端服务后，所述新的全局控制功能从上次服务的全局控制功能获取所述终端的上下文信息。
在一实施例中，当收到终端的接入请求后，在本地控制功能向全局控制功能发送位置更新请求之前，该方法还包括：当本地控制功能没有终端的上下文信息时，本地控制功能从所述全局控制功能或通过所述全局控制功能从上次服务的全局控制功能获取所述终端的上下文信息。
在一实施例中，当收到终端的接入请求后，在本地控制功能向全局控制功能发送位置更新请求之前，该方法还包括：本地控制功能利用认证向量对所述终端进行认证。其中，当本地控制功能没有有效的认证向量时，本地控制功能从全局控制功能或者通过全局控制功能从归属网络服务器获取所述认证向量。
步骤12：全局控制功能为终端分配跟踪区列表和终端临时标识，并将所 述跟踪区列表和终端临时标识发送给本地控制功能。
在步骤11之后，步骤12之前，该方法还包括：全局控制功能在终端的上下文信息中将所述终端接入的本地控制功能设置为当前服务的本地控制功能。
在一实施例中，全局控制功能将所述跟踪区列表和终端临时标识发送给所述本地控制功能时，还将所述终端的签约数据发送给所述本地控制功能。
图6为本发明较佳实施例中，UE附着时的流程图。如图6所示，详细步骤描述如下：
步骤101：UE给基站发送NAS消息附着请求。具体而言，该NAS消息封装在RRC消息中发送给基站，在RRC消息中，UE将保存的旧的临时ID、上次接入的GCF(简称S-GCF)ID和上次接入的LCF(简称S-LCF)ID发送给基站，同时，在RRC消息中，UE将选择的公共陆地移动网络(PLMN，Public Land Mobile Network)的PLMN ID发送给基站。此外，RRC消息还可能携带无线能力信息、UE的属性等信息。
步骤102：基站为该UE的附着请求选择LCF。具体而言，基站可根据步骤101中UE发送的RRC消息携带的属性信息和PLMN ID选择LCF组。若UE发送的RRC消息没有携带属性信息，基站可选择缺省配置的LCF组为该UE服务，在选定LCF组后，若该LCF组由多个LCF组成，基站在该LCF组中为UE选择一个LCF为该UE服务。在此，选中的LCF称为Target LCF，简称T-LCF。
步骤103：基站将NAS消息附着请求发送给T-LCF，其中，在附着请求中携带UE保存的临时ID和接入点(APN，Access Point Name)信息。此外，UE的RRC消息还携带核心网能力信息等其他信息，基站将UE的无线能力信息和附着请求一起发送给T-LCF。
步骤104：T-LCF根据UE的签约、UE的能力信息、UE的其他属性决定是否需要为UE选择其他的LCF，若选择其他的LCF，则T-LCF向基站发送重定向请求，将NAS消息重定向到新的LCF。
而且，T-LCF为UE的接入选择一个为其服务的GCF，在选择GCF时可 考虑UE的能力信息、签约、UE所选的PLMN ID等信息。其中，所选中的GCF称为Target GCF，简称T-GCF。
步骤105：若T-LCF中没有UE的上下文信息，则T-LCF向T-GCF发送上下文请求消息，获取UE的上下文信息。在该上下文请求消息中，T-LCF将UE的全局临时ID和上次接入的LCF(S-LCF)的LCF Code发送给T-GCF。
步骤106：若T-GCF中没有UE的上下文信息，则T-GCF从UE的全局临时标识中获取上次接入的GCF(S-GCF)的标识。UE的全局临时标识为：S-GCF Group ID+S-GCF Code+UE Code，其中，S-GCF的全局标识为：S-GCF Group ID+S-GCF Code。T-GCF从S-GCF中获取UE的上下文信息。另外，在某些场景下(如非正常关机)，S-GCF需从S-LCF中获取UE的上下文信息。
步骤107：T-GCF给T-LCF发送UE的上下文信息，在UE的上下文信息中，T-GCF将UE的国际移动用户识别码(IMSI，International Mobile Subscriber Identification Number)、认证向量等信息发送给T-LCF。
步骤108：若T-LCF未能获取到UE的有效上下文信息，则T-LCF给UE发送ID请求消息，请求UE发送IMSI。
步骤109：UE给T-LCF发送ID响应，将IMSI发送给T-LCF。
步骤110：若T-LCF中没有有效的认证向量，则T-LCF向T-GCF请求认证向量；若T-GCF中也没有有效的认证向量，则T-GCF向HSS获取该UE的认证向量。
步骤111：若T-LCF决定要对UE进行身份认证，则T-LCF给UE发送认证请求。
步骤112：UE给T-LCF发送认证响应。
步骤113：T-LCF给T-GCF发送位置更新请求消息，T-LCF将UE在附着请求中携带的上次接入的临时ID、上次分配的TA list等发送给T-GCF。
步骤114：T-GCF在UE的上下文信息中将UE的当前服务LCF设置为T-LCF。T-GCF向HSS注册UE当前所在的位置，T-GCF将T-LCF和T-GCF的全局标识发送给HSS，HSS将上述信息保存在UE的上下文信息中。HSS 将UE的签约数据发送给T-GCF。T-GCF决定是否给UE分配新的临时ID和TA list。
步骤115：T-GCF给T-LCF发送位置更新响应消息，在该消息中T-GCF将其给UE分配的新的临时ID和TA list、以及从HSS获取的UE的签约数据发送给T-LCF。
步骤116：T-LCF为UE选择SGW和PGW。T-LCF给SGW发送PDN连接建立请求，并将UE在NAS消息附着请求中发送的APN、T-LCF选择的PGW信息发送给SGW。
步骤117：SGW为该PDN连接所需的承载分配隧道端点标识(TEID)，并给PGW发送建立会话请求。
步骤118：PGW为该UE的PDN连接分配IP地址、为承载分配TEID，并将上述信息，以及从SGW收到的SGW的TEID、APN等信息保存到UE的上下文信息中。PGW给SGW发送建立会话响应，将PGW为UE分配的IP地址、TEID、上下行TFT等信息发送给SGW。
步骤119：SGW给T-LCF发送PDN连接建立响应。
步骤120：T-LCF给基站发送初始UE上下文设置请求，在该消息中，T-LCF将附着响应NAS消息携带给UE。在上述附着响应NAS消息中，T-LCF将UE的上行TFT发送给UE。
步骤121：基站为UE的各承载分配空口资源，并通过RRC消息将空口资源配置给UE，并且在RRC消息中将附着响应NAS消息携带给UE。
步骤122：基站为UE的各承载分配X7接口上的TEID，并给T-LCF发送初始UE上下文设置响应，将X7接口的TEID发送给T-LCF。
步骤123：UE给T-LCF发送附着完成消息。
步骤124：T-LCF给SGW发送更新隧道请求，将基站分配的X7接口的TEID发送给SGW。
步骤125：SGW给T-LCF发送更新隧道响应。
图7为本发明较佳实施例中，UE发起跟踪区更新(TAU)的流程图。如图7所示的流程可用于周期性位置更新和跟踪区改变的位置更新。跟踪区改 变的位置更新是当UE在空闲态移动进入一个新的跟踪区，且该跟踪区不在UE当前的跟踪区列表时发起的。在周期性跟踪区更新流程中，UE没有移出当前所保存跟踪区列表的服务范围。如图7所示，详细步骤描述如下：
步骤201：UE给基站(NodeB)发送NAS消息TAU请求，该NAS消息封装在RRC消息中发送给基站。在RRC消息中，UE将保存的旧的临时ID、上次接入的GCF(S-GCF)ID和上次接入的LCF(S-LCF)ID发送给基站。在RRC消息中，UE还可能将无线能力信息、UE的属性等信息进行发送。
步骤202：基站为该UE的TAU请求选择LCF。具体而言，基站可根据步骤201中UE发送的RRC消息携带的属性信息以及上次接入的LCF类型选择LCF组。在选定LCF组后，若该LCF组由多个LCF组成，基站在该LCF组中为UE选择一个LCF为该UE服务。其中，选中的LCF称为Target LCF，简称T-LCF。
步骤203：基站将NAS消息TAU请求发送给T-LCF。其中，在TAU请求消息中携带UE保存的临时ID和TA list。基站将UE的无线能力信息和TAU请求消息一起发送给T-LCF。
步骤204：若UE在TAU请求中携带的上次接入的GCF ID所标识的GCF无法继续为该UE服务(如，UE当前所在位置的跟踪区不在上次接入的GCF的服务范围之内)，则T-LCF为UE选择一个新的GCF为其服务。在选择GCF时可考虑UE的能力信息、签约等信息。其中，所选中的GCF称为Target GCF，简称T-GCF。
步骤205：若T-LCF中没有UE的上下文信息，则T-LCF向T-GCF发送上下文请求消息，获取UE的上下文信息。在该上下文请求消息中，T-LCF将UE的全局临时ID发送给T-GCF。
步骤206：若T-GCF中没有UE的上下文信息，T-GCF从UE的全局临时标识中获取上次接入的GCF(S-GCF)的标识。UE的全局临时标识为：S-GCF Group ID+S-GCF Code+UE Code，其中，S-GCF的全局标识为：S-GCF Group ID+S-GCF Code。T-GCF从S-GCF中获取UE的上下文信息。
步骤207：T-GCF给T-LCF发送UE的上下文信息，在UE的上下文信息 中，T-GCF将UE的IMSI、认证向量等信息发送给T-LCF。
步骤208：若T-LCF未能获取到UE的有效上下文信息，则T-LCF给UE发送ID请求消息，请求UE发送IMSI。
步骤209：UE给T-LCF发送ID响应，将IMSI发送给T-LCF。
步骤210：若T-LCF中没有有效的认证向量，则T-LCF向T-GCF请求认证向量；若T-GCF中也没有有效的认证向量，则T-GCF向HSS获取该UE的认证向量。
步骤211：若T-LCF决定要对UE进行身份认证，则T-LCF给UE发送认证请求。
步骤212：UE给T-LCF发送认证响应。
步骤213：T-LCF给T-GCF发送位置更新请求消息，T-LCF将UE在TAU请求中携带的上次接入的临时ID、上次分配的TA list等带给T-GCF。
步骤214：T-GCF在UE的上下文信息中将UE的当前服务LCF设为T-LCF，并向HSS注册UE当前所在的位置，T-GCF将T-LCF和T-GCF的全局标识发送给HSS，HSS将上述信息保存在UE的上下文信息中。HSS将UE的签约数据发送给T-GCF。T-GCF决定是否给UE分配新的临时ID和分配新的TA list。
步骤215：T-GCF给T-LCF发送TAU响应消息，若T-GCF分配了新的临时ID和新TA list，则在该消息中T-GCF将其给UE分配的临时ID和TA list、以及从HSS获取的UE的签约数据发送给T-LCF。
步骤216：T-LCF为UE选择SGW。T-LCF给SGW发送会话建立请求。将UE的会话上下文信息发送给SGW。
步骤217：SGW为UE会话上下文中的每个承载分配TEID，并给相应的PGW发送会话修改请求。
步骤218：PGW从SGW收到的S5隧道TEID保存到UE的会话对应的承载上下文中。PGW给SGW发送会话修改响应。
步骤219：SGW给T-LCF发送会话建立响应，将SGW分配的X7接口隧道TEID发送给T-LCF。
步骤220：T-LCF给UE发送TAU接受NAS消息，T-LCF将新分配的UE临时ID和TA list发送给UE。
步骤221：UE给T-LCF发送TAU完成消息。
此外，本发明较佳实施例还提供一种移动网络分级架构的接入***，如图8所示，包括：
本地控制功能801，设置成：当收到终端的接入请求后，向全局控制功能发送位置更新请求；
全局控制功能802，设置成：为所述终端分配跟踪区列表和终端临时标识，并将所述跟踪区列表和终端临时标识发送给本地控制功能。
在一实施例中，接入请求为附着请求或跟踪区更新请求。
在一实施例中，全局控制功能802，还设置成：在本地控制功能向全局控制功能发送位置更新请求之后，在全局控制功能为所述终端分配跟踪区列表和终端临时标识之前，在终端的上下文信息中将所述终端接入的本地控制功能设置为当前服务的本地控制功能。
在一实施例中，本地控制功能801，还设置成：当收到终端的接入请求后，向全局控制功能发送位置更新请求之前，当所述接入请求携带的上次服务的全局控制功能标识对应的全局控制功能无法继续为所述终端服务时，选择新的全局控制功能为所述终端服务。
在一实施例中，本地控制功能801，还设置成：当收到终端的接入请求后，向全局控制功能发送位置更新请求之前，当本地控制功能没有终端的上下文信息时，从所述全局控制功能或通过所述全局控制功能从上次服务的全局控制功能获取所述终端的上下文信息。
在一实施例中，全局控制功能802，还设置成：在将所述跟踪区列表和终端临时标识发送给所述本地控制功能时，将所述终端的签约数据发送给所述本地控制功能。
在一实施例中，本地控制功能801，还设置成：当收到终端的接入请求后，在向全局控制功能发送位置更新请求之前，利用认证向量对所述终端进 行认证。
在一实施例中，本地控制功能801，还设置成：在利用认证向量对所述终端进行认证之前，当所述本地控制功能没有有效的认证向量时，从全局控制功能或者通过全局控制功能从归属网络服务器获取所述认证向量。
此外，上述***的具体处理流程同上述方法所述，故于此不再赘述。
本发明实施例还公开了一种计算机程序，包括程序指令，当该程序指令被计算机执行时，使得该计算机可执行上述任意的移动网络分级架构的接入方法。
本发明实施例还公开了一种载有所述的计算机程序的载体。
在阅读并理解了附图和详细描述后，可以明白其他方面。
以上显示和描述了本发明的基本原理和主要特征和本发明的优点。本发明不受上述实施例的限制，上述实施例和说明书中描述的只是说明本发明的原理，在不脱离本发明精神和范围的前提下，本发明还会有各种变化和改进，这些变化和改进都落入要求保护的本发明范围内。
工业实用性
在本发明技术方案中，当收到终端的接入请求后，本地控制功能向全局控制功能发送位置更新请求；全局控制功能为终端分配跟踪区列表和终端临时标识，并将跟踪区列表和终端临时标识发送给本地控制功能。通过本地控制功能和全局控制功能将接入请求处理功能下移，使得终端的接入请求可以就近处理，并且避免了频繁的信令交互，在提升接入时延体验的同时不会增加***信令开销。因此本发明具有很强的工业实用性。

Claims (17)

  1. 一种移动网络分级架构的接入方法，包括：
    当收到终端的接入请求后，本地控制功能(LCF)向全局控制功能(GCF)发送位置更新请求；
    所述GCF为所述终端分配跟踪区列表和终端临时标识，并将所述跟踪区列表和终端临时标识发送给所述LCF。
  2. 如权利要求1所述的接入方法，其中：所述接入请求为附着请求或跟踪区更新请求。
  3. 如权利要求1所述的接入方法，其中：在所述LCF向GCF发送位置更新请求的步骤之后，所述GCF为所述终端分配跟踪区列表和终端临时标识的步骤之前，该方法还包括：
    所述GCF在所述终端的上下文信息中将所述终端接入的LCF设置为当前服务的LCF。
  4. 如权利要求1所述的接入方法，其中：当收到终端的接入请求的步骤之后，在所述LCF向GCF发送位置更新请求的步骤之前，该方法还包括：
    当所述接入请求携带的上次服务的GCF标识对应的GCF无法继续为所述终端服务时，所述LCF选择新的GCF为所述终端服务。
  5. 如权利要求4所述的接入方法，其中：在所述LCF选择新的GCF为所述终端服务的步骤之后，该方法还包括：
    所述新的GCF从上次服务的GCF获取所述终端的上下文信息。
  6. 如权利要求1所述的接入方法，其中：当收到终端的接入请求的步骤之后，在所述LCF向GCF发送位置更新请求的步骤之前，该方法还包括：
    当所述LCF没有所述终端的上下文信息时，所述LCF从所述GCF或通过所述GCF从上次服务的GCF获取所述终端的上下文信息。
  7. 如权利要求1所述的接入方法，其中：所述GCF将所述跟踪区列表和终端临时标识发送给所述LCF时，该方法还包括：
    所述GCF将所述终端的签约数据发送给所述LCF。
  8. 如权利要求1所述的接入方法，其中：当收到终端的接入请求的步骤之后，在所述LCF向GCF发送位置更新请求的步骤之前，该方法还包括：
    所述LCF利用认证向量对所述终端进行认证。
  9. 如权利要求8所述的接入方法，其中：在所述LCF利用认证向量对所述终端进行认证的步骤之前，该方法还包括：
    当所述LCF没有有效的认证向量时，所述LCF从所述GCF或者通过所述GCF从所述终端的归属网络服务器获取所述认证向量。
  10. 一种移动网络分级架构的接入***，包括本地控制功能(LCF)和全局控制功能(GCF)，其中：
    所述LCF设置成：当收到终端的接入请求后，向所述GCF发送位置更新请求；
    所述GCF设置成：为所述终端分配跟踪区列表和终端临时标识，并将所述跟踪区列表和终端临时标识发送给所述LCF。
  11. 如权利要求10所述的接入***，其中：所述接入请求为附着请求或跟踪区更新请求。
  12. 如权利要求10所述的接入***，其中：所述GCF还设置成：在LCF向GCF发送位置更新请求之后，在GCF为所述终端分配跟踪区列表和终端临时标识之前，在终端的上下文信息中将所述终端接入的LCF设置为当前服务的LCF。
  13. 如权利要求10所述的接入***，其中：所述LCF还设置成：当收到终端的接入请求后，向GCF发送位置更新请求之前，当所述接入请求携带的上次服务的GCF标识对应的GCF无法继续为所述终端服务时，选择新的GCF为所述终端服务。
  14. 如权利要求10所述的接入***，其中：所述LCF还设置成：当收到终端的接入请求后，向GCF发送位置更新请求之前，当LCF没有终端的上下文信息时，从所述GCF或通过所述GCF从上次服务的GCF获取所述终端的上下文信息。
  15. 如权利要求10所述的接入***，其中：所述GCF还设置成：在将 所述跟踪区列表和终端临时标识发送给所述LCF时，将所述终端的签约数据发送给所述LCF。
  16. 如权利要求10所述的接入***，其中：所述LCF还设置成：当收到终端的接入请求后，在向GCF发送位置更新请求之前，利用认证向量对所述终端进行认证。
  17. 如权利要求16所述的接入***，其中：所述LCF还设置成：在利用认证向量对所述终端进行认证之前，当所述LCF没有有效的认证向量时，从所述GCF或者通过所述GCF从所述终端归属网络服务器获取所述认证向量。
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