WO2009006848A1 - Procédé de commutation de réseau d'accès, dispositif de gestion d'ancrage, et dispositif d'accès mobile - Google Patents

Procédé de commutation de réseau d'accès, dispositif de gestion d'ancrage, et dispositif d'accès mobile Download PDF

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Publication number
WO2009006848A1
WO2009006848A1 PCT/CN2008/071601 CN2008071601W WO2009006848A1 WO 2009006848 A1 WO2009006848 A1 WO 2009006848A1 CN 2008071601 W CN2008071601 W CN 2008071601W WO 2009006848 A1 WO2009006848 A1 WO 2009006848A1
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WIPO (PCT)
Prior art keywords
anchor
mobility management
management protocol
address corresponding
address
Prior art date
Application number
PCT/CN2008/071601
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English (en)
French (fr)
Inventor
Yu Yin
Ying Hu
Shanshan Wang
Original Assignee
Huawei Technologies Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Priority to EP08773155A priority Critical patent/EP2169849B1/en
Publication of WO2009006848A1 publication Critical patent/WO2009006848A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W8/00Network data management
    • H04W8/02Processing 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
    • H04W8/06Registration at serving network Location Register, VLR or user mobility server
    • 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
    • H04W36/0022Control or signalling for completing the hand-off for data sessions of end-to-end connection for transferring data sessions between adjacent core network technologies
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/14Reselecting a network or an air interface
    • H04W36/144Reselecting a network or an air interface over a different radio air interface technology
    • H04W36/1443Reselecting a network or an air interface over a different radio air interface technology between licensed networks
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W8/00Network data management
    • H04W8/02Processing 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
    • H04W8/08Mobility data transfer
    • H04W8/087Mobility data transfer for preserving data network PoA address despite hand-offs
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W8/00Network data management
    • H04W8/26Network addressing or numbering for mobility support
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W88/00Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/16Gateway arrangements

Definitions

  • Access network switching method anchor management device, mobile access device
  • the present invention relates to the field of mobile communications technologies, and in particular, to an access network switching method, an anchor management device, and a mobile access device.
  • the wireless communication network defined by the standard organization of the 3GPP is generally composed of a 3GPP radio access network and a 3GPP wireless core network.
  • the third generation mobile communication system architecture evolution (SAE, 3GPP System Architecture Evolution) network supports mobility between 3GPP access technologies, non-3GPP (non-3GPP) access technologies, and heterogeneous access networks.
  • SAE Packet Data Network Gateway
  • PDN GW Packet Data Network Gateway
  • the SAE network uses the PDN GW as an anchor device for inter-system handover, and is supported by a network element such as Home Subscriber Server (HSS).
  • HSS Home Subscriber Server
  • the AAA Server, Authentication, Authorization and Accounting Sever is used to manage the anchor information currently used by the mobile terminal.
  • the mobility management entity When the mobile terminal is handed over from one access network to another access network, the mobility management entity obtains the anchor point currently used by the mobile terminal from the HSS/AAA and acts as a target anchor for the new data channel connection. In this way, as long as the mobile terminal uses the same anchor point to access the data packet network before and after the handover, the same IP address allocation can be obtained, thereby achieving continuity of data services.
  • SAE uses the Mobile IP (MIP, Mobile IP) protocol to achieve mobility between heterogeneous networks.
  • the mobile terminal moves from an EMU (Evolved UMTS Terrestrial Radio Access Network) (E-UTRAN) to a wireless local area network (WLAN, Wireless Local) Area Network), after the E-UTRAN establishes a connection successfully, the mobile terminal stores the home address (HA) address of the used PDN GW, that is, the HA address of the MIP protocol, in the HSS/AAA.
  • the Proxy Mobility Agent PMA obtains the HA address of the saved PDN GW from the HSS/AAA, and sends a PMIP registration request to the PDN GW to establish a PMIP tunnel with the PDN GW.
  • the IP connectivity establishment of the mobile terminal in the WLAN access network to the PDN GW is completed. Since the mobile terminal establishes a PMIP tunnel with the PDN GW with the same IP address before and after the handover, the continuity of the data service can be achieved.
  • the handover of the heterogeneous access technology when the handover of the heterogeneous access technology is used, the same mobility management protocol MIP is used. If the 3GPP access technology can also use the General Packet Radio Service (GPRS) GPRS Tunneling Protocol (GTP), the handover of the heterogeneous access technology has different handovers of the mobility management protocol, such as the GTP protocol. Switching between MIP protocols.
  • GPRS General Packet Radio Service
  • GTP General Packet Radio Service Tunneling Protocol
  • the GTP Control Plane (GTP-C) address of the PDN GW is stored in HSS/AAA.
  • HSS/AAA is an address of the same network as the service address assigned to the terminal, and is a user plane address.
  • the HA address of the PDN GW and the GTP-C are usually two different addresses on the PDN GW.
  • the prior art scheme cannot realize the continuity of data service when switching between networks using different mobility management protocols.
  • the embodiments of the present invention provide an access network handover method, an anchor management device, and a mobile access device, which can enable a mobile terminal to maintain data service continuity when switching between access networks using different mobility management protocols. Sex.
  • An embodiment of the present invention provides a method for switching an access network, including:
  • the access gateway or the mobility management entity acquires an anchor address corresponding to the second mobility management protocol
  • the anchor address corresponding to the second mobility management protocol indicates an anchor device used by the mobile terminal in the first network
  • the access gateway or the mobility management entity uses the second mobility management protocol to establish an access gateway or a mobility management entity according to the anchor address corresponding to the second mobility management protocol.
  • An embodiment of the present invention further provides an anchor management device, including:
  • a receiving unit configured to receive an anchor address corresponding to the mobility management protocol of the anchor device currently used by the mobile terminal
  • a storage unit configured to record anchor point information of the anchor device, and update according to an anchor address corresponding to the mobility management protocol received by the receiving unit, where the anchor point information includes multiple movements of the anchor device The anchor address corresponding to the management protocol;
  • a selecting unit configured to select, according to an anchor address received by the receiving unit, an anchor address corresponding to a mobility management protocol used by a network to which the mobile terminal switches to the anchor device;
  • a sending unit configured to send an anchor address selected by the selecting unit.
  • the embodiment of the invention further provides a mobile access device, which includes:
  • An obtaining unit configured to obtain an anchor address corresponding to the mobility management protocol of the anchor device currently used by the mobile terminal
  • a selecting unit configured to select, according to an anchor address obtained by the acquiring unit, an anchor address corresponding to a mobility management protocol used by a network to which the mobile terminal switches to the anchor device;
  • connection establishing unit configured to establish a connection by using a corresponding mobility management protocol according to the anchor address selected by the selecting unit.
  • An embodiment of the present invention further provides an access network switching system, including: a first network using a first mobility management protocol, a second network using a second mobility management protocol, and an access gateway connected to the first network, a mobility management entity connected to the second network, wherein:
  • the mobility management entity acquires an anchor address corresponding to the second mobility management protocol, where the second mobility management protocol corresponds An anchor point indicating an anchor device used by the mobile terminal in the first network; and establishing the mobility management entity using the second mobility management protocol according to the anchor address corresponding to the second mobility management protocol a connection to an anchor device indicated by an anchor address corresponding to the second mobility management protocol;
  • the access gateway acquires an anchor address corresponding to the first mobility management protocol, where the first mobility management protocol corresponds
  • the anchor address indicates an anchor device used by the mobile terminal in the second network; and according to the first move
  • the anchor address corresponding to the management protocol is used to establish, by using the first mobility management protocol, the connection of the access gateway to the anchor device indicated by the anchor address corresponding to the first mobility management protocol.
  • the anchor point management device saves an anchor point address corresponding to multiple different mobility management protocols of the anchor point device, when the mobile terminal uses
  • the anchor management device provides the mobile terminal with an anchor address corresponding to another mobility management protocol of the anchor device, according to the The anchor address establishes a connection between the mobile terminal and the access network. Therefore, the continuity of data services can be maintained when switching between access networks using different mobility management protocols.
  • FIG. 1 is a signaling flowchart of a first embodiment of an access network handover method according to the present invention
  • FIG. 2 is a signaling flowchart of a second embodiment of an access network handover method according to the present invention.
  • FIG. 3 is a schematic structural diagram of an embodiment of a mobile network system according to the present invention.
  • FIG. 1 is a signaling flowchart of a first embodiment of an access network handover method according to the present invention.
  • the mobile terminal UE, User Equipment
  • the access network switching process includes:
  • Step 101 The mobile terminal detects a signal of the non-3GPP access network and connects to the non-3GPP access network.
  • Step 102 The non-3GPP access gateway finds that the mobile terminal needs to access the SAE core network, and sends the mobile terminal access authentication request to the anchor management device HSS/AAA, and the non-3GPP access network acquires the subscription of the mobile terminal in the authentication process.
  • Step 103 After the HSS/AAA successfully performs access authentication on the mobile terminal, the access gateway proxyes the mobile terminal, and initiates a request for establishing a connection to the anchor device PDN GW by using the PMIP protocol;
  • the non-3GPP access gateway sends a Binding Update message to the packet data gateway PDN GW.
  • the PDN GW acts as a packet data gateway for mobile terminals and is also an anchor device for non-3GPP/3GPP mobile mobility. It supports multiple mobility management protocols and therefore has anchor addresses corresponding to different mobility management protocols. For example, the PDN GW has an anchor point corresponding to the PMIP protocol. Address.
  • Step 104 After receiving the request for establishing a connection, the PDN GW provides an anchor address corresponding to multiple mobility management protocols of the PDN GW to the HSS/AAA, and the HSS/AAA updates the saved anchor according to the anchor address provided by the PDN GW. Point information, the HSS/AAA returns a response message that the anchor information has been updated to the PDN GW;
  • the HSS/AAA is an anchor management device, which can save and maintain anchor point information of the anchor device, where the anchor point information includes an anchor address corresponding to a different mobility management protocol of the anchor device; HSS/AAA It is also possible to provide the mobility management entity, the access gateway or the mobile terminal with an anchor address of an anchor device currently used by the mobile terminal, the anchor address corresponding to a plurality of mobility management protocols.
  • Step 105 The PDN GW returns a response message to the access gateway.
  • the PDN GW returns a Binding Ack message to the access gateway according to the Binding Update message sent by the access gateway using the PMIP protocol.
  • the above steps 101 to 105 are processes for the mobile terminal to access the SAE core network through the non-3GPP access network based on the PMIP protocol.
  • the 3GPP E-UTRAN access network uses GTP as the mobility management protocol.
  • Step 106 The mobile terminal sends an attach request (Attached Request) to the base station of the E-UTRAN access network;
  • Step 107 The base station of the E-UTRAN access network forwards the attach request to the mobility management entity (MME, Mobility Management Entity);
  • MME Mobility Management Entity
  • Step 108 The MME sends a mobile terminal access authentication request to the HSS/AAA, and the HSS/AAA completes the access authentication to the mobile terminal, and returns an authentication request response message to the MME.
  • Step 109 The MME initiates a location update request to the HSS/AAA, and registers the MME address to
  • the HSS/AAA simultaneously sends the subscription data of the mobile terminal to the MME, and sends the anchor address corresponding to the GTP protocol in the saved anchor information to the MME;
  • the HSS/AAA functions as an anchor management device, it can save and maintain the anchor address corresponding to different mobility management protocols of the anchor device, and thus can save the saved anchor point corresponding to the GTP protocol.
  • the address is sent to the MME.
  • the HSS/AAA may provide multiple anchor addresses corresponding to multiple mobility management protocols (including the GTP mobility management protocol) to the MME, or may only provide an anchor address corresponding to the GTP mobility management protocol, ie, GTP-C. Address to the MME.
  • Step 110 The MME selects a serving gateway (Serving GW) that supports the GTP protocol, sends a bearer setup request (Create Bearer Request) thereto, and provides the anchor address corresponding to the GTP protocol to the Serving GW;
  • Serving GW serving gateway
  • Bearer setup request Create Bearer Request
  • the MME When the HSS/AAA only provides the anchor address corresponding to the GTP mobility management protocol to the MME, the MME only provides the GTP-C address corresponding to the GTP mobility management protocol, that is, the GTP-C address to the Serving GW.
  • the MME may provide anchor devices and different mobility management protocols (including the GTP mobility management protocol).
  • the corresponding multiple anchor addresses are given to the Serving GW, and the anchor address corresponding to the GTP mobility management protocol, that is, the GTP-C address, may be selected and provided to the Serving GW.
  • Step 111 The Serving GW forwards the bearer setup request to the PDN GW according to the anchor address corresponding to the GTP protocol.
  • the Serving GW forwards the bearer setup request to the PDN GW according to the anchor address corresponding to the GTP mobility management protocol provided by the MME;
  • the MME When the MME provides multiple anchor addresses corresponding to multiple mobility management protocols (including the GTP mobility management protocol) of the anchor device to the Serving GW, since the protocol supported by the Serving GW is the GTP protocol, the Serving GW selects and the GTP mobility management.
  • the anchor address corresponding to the protocol forwards the bearer setup request to the PDN GW.
  • Step 112 After receiving the bearer setup request, the PDN GW provides an anchor address corresponding to multiple mobility management protocols used by the anchor device currently used by the mobile terminal, and the HSS/AAA updates the anchor information of the saved anchor device.
  • Step 113 The PDN GW returns a response bearer setup message (Create Bearer Response) to the Serving GW, and carries the anchor address of the anchor device currently used by the mobile terminal.
  • Bearer Response a response bearer setup message
  • Step 114 The Serving GW forwards the response bearer setup response message to the MME, and carries the mobile
  • the anchor address of the anchor device is currently used by the terminal;
  • Step 115 After receiving the response bearer setup response message, the MME sends the anchor address of the anchor device to the HSS/AAA, and the HSS/AAA updates the anchor information of the saved anchor device, and the HSS/AAA to the PDN.
  • the GW returns a response message that the anchor information has been updated;
  • Step 116 The MME sends an attach response message to the base station of the E-UTRAN access network.
  • Step 117 A radio bearer is established between the base station of the E-UTRAN access network and the mobile terminal.
  • Step 118 The base station of the E-UTRAN access network The MME returns a response message that the attachment is completed.
  • the manner in which the anchor management device obtains and updates the anchor address corresponding to the multiple mobility management protocols of the anchor device may be managed by the anchor device, the mobility management entity, or the mobile terminal to the anchor point in the process of establishing a connection between the mobile terminal and the mobile terminal.
  • the device provides an anchor address corresponding to multiple mobility management protocols of the anchor device currently used by the mobile terminal.
  • the anchor device PDN GW provides the anchor address corresponding to the multiple mobility management protocols currently used by the anchor device of the mobile terminal to The anchor management device HSS/AAA is updated;
  • step 112 when the mobile terminal switches to the 3GPP network, in the bearer setup request process, the anchor device PDN GW provides the anchor point address currently used by the mobile terminal and the anchor address corresponding to multiple mobility management protocols to the anchor point management.
  • the device HSS/AAA is updated;
  • step 115 when the mobile terminal switches to the 3GPP network, after the bearer setup request, the mobility management entity provides the anchor address corresponding to the multiple mobility management protocols currently used by the mobile terminal to the anchor management device HSS/ AAA is updated.
  • one or more of steps 104, 112, 115 provide the anchor management device with an anchor address corresponding to the plurality of mobility management protocols of the anchor device currently used by the mobile terminal.
  • the anchor address is identification information that can be addressed to the anchor point, and may be an anchor IP address or an anchor domain name.
  • the specific address of the anchor address corresponding to a certain mobility management protocol may be an IP address and corresponding protocol information, for example: GTP IP1; corresponding to multiple mobility management protocols.
  • the specific address of the anchor address may be a correspondence between multiple IP addresses and different mobility management protocols, for example, GTP ⁇ : 1P1; PMIP-IP2; the anchor address corresponding to multiple mobility management protocols may be a specific form Correspondence between IP address and different mobility management protocols, examples For example, GTP - IP1; PMIP ⁇ IP1.
  • the specific address of the anchor address corresponding to a certain mobility management protocol may be a domain name and corresponding protocol information GTP ⁇ sina.com or the domain name contains protocol information sina.GTP.com
  • the specific form of the anchor address corresponding to the multiple mobility management protocols may be multiple domain names and corresponding protocol information, for example: GTP ⁇ domain name 1, PMIP ⁇ domain name 2, or multiple multiple protocol information Domain name, for example, sina.GTP.com, sina.PMIP.com, or a domain name that does not contain the protocol information part, for example: sina.com, the protocol information needs to be selected by the network element of the protocol, ie MME, access gateway, or The Serving GW is added. For example, if the MME chooses to use the GTP protocol, the domain name is constructed as sina.GTP.com when the domain name is resolved.
  • step 109 when the anchor address acquired by the MME, the access gateway, or the Serving GW is an anchor address corresponding to multiple mobility management protocols, the MME, the access gateway, or the Serving GW may perform according to its own configuration or policy. Selecting a mobility management protocol and using the anchor address corresponding to the mobility management protocol to establish a connection to the anchor device indicated by the anchor address.
  • the specific manner is: when the anchor address corresponding to the multiple mobility management protocols is multiple anchor IP addresses corresponding to multiple mobility management protocols, the MME, the access gateway, or the Serving GW selects one according to its own configuration or policy. a mobility management protocol, and using the IP address of the anchor corresponding to the mobility management protocol as the IP address of the destination anchor device, establishing a connection to the anchor device indicated by the IP address;
  • the MME, the access gateway, or the Serving GW may select a mobility management protocol according to its own configuration or policy, and Using the anchor domain name corresponding to the mobility management protocol, including constructing an anchor domain name corresponding to the mobility management protocol as described above, and then obtaining an anchor IP address through the domain name resolution service, and using the anchor IP address as the destination anchor device The IP address establishes a connection to the anchor device indicated by the IP address.
  • the domain name resolution service may be provided by the MME, the access gateway, or the Serving GW itself, or by a third-party domain name resolution server (DNS Domain Name Server).
  • DNS Domain Name Server a third-party domain name resolution server
  • Step 201 The mobile terminal sends an attach request to a base station of the 3GPP access network.
  • the 3GPP access network is an E-UTRAN network.
  • the E-UTRAN network uses GTP as the mobility management protocol.
  • Step 202 The base station of the 3GPP access network forwards the attach request to the MME.
  • Step 203 The MME sends a mobile terminal access authentication request to the HSS/AAA, and the HSS/AAA completes the access authentication to the mobile terminal, and returns an authentication request response message to the MME.
  • Step 204 The MME initiates a location update request to the HSS/AAA, and registers the MME address to the HSS/AAA.
  • the HSS/AAA simultaneously delivers the subscription data of the mobile terminal to the MME, and saves the saved anchor point corresponding to the GTP protocol.
  • the address is sent to the MME;
  • the HSS/AAA is an anchor management device, which can save and maintain anchor point information of the anchor device, where the anchor point information includes an anchor address corresponding to a different mobility management protocol of the anchor device; HSS/AAA It is also possible to provide the mobility management entity, the access gateway or the mobile terminal with an anchor address of an anchor device currently used by the mobile terminal, the anchor address corresponding to a plurality of mobility management protocols.
  • the HSS/AAA may provide multiple anchor addresses corresponding to multiple mobility management protocols (including the GTP mobility management protocol) to the MME, or may only provide an anchor address corresponding to the GTP mobility management protocol, ie, GTP-C. Address to the MME. If the terminal first accesses the HSS/AAA without providing an anchor address, the MME may select an anchor point based on other information (e.g., access point name APN) or policy (e.g., support GTP protocol).
  • other information e.g., access point name APN
  • policy e.g., support GTP protocol
  • Step 205 The MME selects a Serving GW that supports the GTP protocol, sends a bearer setup request thereto, and provides an anchor address corresponding to the GTP protocol allocated by the PDN GW to the Serving GW;
  • the MME When the HSS/AAA only provides the anchor address corresponding to the GTP mobility management protocol to the MME, the MME only provides the anchor address corresponding to the GTP mobility management protocol to the Serving GW, that is, the GTP-C address.
  • the MME may provide anchor devices and different mobility management protocols (including the GTP mobility management protocol).
  • the corresponding multiple anchor addresses are given to the Serving GW, and the anchor address corresponding to the GTP mobility management protocol may also be selected and provided to the Serving GW, that is, the GTP-C address.
  • Step 206 The Serving GW forwards the bearer setup request to the PDN GW according to the anchor address corresponding to the GTP protocol.
  • the Serving GW forwards the bearer setup request to the PDN GW according to the anchor address corresponding to the GTP mobility management protocol provided by the MME;
  • the MME When the MME provides multiple anchor addresses corresponding to multiple mobility management protocols (including the GTP mobility management protocol) of the anchor device to the Serving GW, since the protocol supported by the Serving GW is the GTP protocol, the Serving GW selects and the GTP mobility management.
  • the anchor address corresponding to the protocol forwards the bearer setup request to the PDN GW.
  • Step 207 After receiving the bearer setup request, the PDN GW provides an anchor point corresponding to multiple mobility management protocols used by the anchor device currently used by the mobile terminal to the HSS/AAA, and the HSS/AAA updates the anchor point of the anchor device saved.
  • Step 208 The PDN GW returns a response message to the Serving GW, and carries the anchor address of the anchor device currently used by the mobile terminal.
  • Step 209 The Serving GW forwards the response bearer setup response message to the MME, and carries the anchor address of the anchor device currently used by the mobile terminal.
  • Step 210 After receiving the response bearer setup response message, the MME forwards the anchor address of the anchor device to the HSS/AAA, and the HSS/AAA updates the anchor information of the anchor device, and HSS/AAA to the PDN GW. Returns a response message with updated anchor information;
  • Step 211 The MME sends an attach response message to the base station of the 3GPP access network.
  • Step 212 Establish a radio bearer between the base station of the 3GPP access network and the mobile terminal.
  • Step 213 The base station of the 3GPP access network returns a response message of the attachment completion to the MME.
  • the foregoing step 201 to step 213 are a process in which the mobile terminal accesses the SAE core network through the 3GPP access network based on the GTP protocol.
  • the non-3GPP access network uses PMIP as the mobility management protocol.
  • Step 214 The mobile terminal establishes a connection with the non-3GPP access network.
  • Step 215 The non-3GPP access network discovers that the mobile terminal needs to access the SAE core network, and sends a mobile terminal access authentication request to the HSS/AAA, and the non-3GPP access network acquires the authentication process.
  • Step 216 The access gateway proxy mobile terminal initiates a connection establishment request to the PDN GW by using a PMIP protocol according to an anchor address corresponding to the PMIP protocol.
  • the access gateway sends a Binding Update message to the PDN GW.
  • the PDN GW acts as a packet data gateway for mobile terminals and is also an anchor device for mobile between non-3GPP/3GPP. It supports multiple mobility management protocols and therefore has anchor addresses corresponding to different mobility management protocols. For example, the PDN GW has an anchor address corresponding to the PMIP protocol.
  • Step 217 After receiving the request for establishing a connection, the PDN GW manages the device to the anchor point.
  • the HSS/AAA provides the anchor address corresponding to the multiple mobility management protocols of the anchor device currently used by the mobile terminal, and the HSS/AAA updates the saved anchor information according to the anchor address provided by the PDN GW, and the HSS/AAA returns to the PDN GW.
  • Step 218 The PDN GW returns a response message to the access gateway.
  • the PDN GW returns a Binding Ack message to the access gateway.
  • the manner in which the anchor management device obtains and updates the anchor address corresponding to the multiple mobility management protocols of the anchor device may be managed by the anchor device, the mobility management entity, or the mobile terminal to the anchor point in the process of establishing a connection between the mobile terminal and the mobile terminal.
  • the device provides an anchor address corresponding to multiple mobility management protocols of the anchor device currently used by the mobile terminal.
  • the mobile terminal provides the anchor address corresponding to the multiple mobility management protocols of the anchor device currently used by the mobile terminal by the anchor device PDN GW in the bearer setup request process in the 3GPP network.
  • step 210 after the mobile terminal establishes a bearer setup request in the 3GPP network, the mobility management entity provides the anchor point device currently used by the mobile terminal and the anchor address corresponding to multiple mobility management protocols to the anchor management device HSS/AAA. Update.
  • the anchor device PDN GW when the mobile terminal switches to the non-3GPP network, after the access authentication, the anchor device PDN GW provides the anchor address corresponding to the multiple mobility management protocols used by the anchor device currently used by the mobile terminal. Update the anchor management device HSS/AAA.
  • one or more of steps 207, 210, 217 may be provided to the anchor management device.
  • Another embodiment of the present invention further provides an access network switching method.
  • An IP address is used as the anchor IP address of the mobility management protocol during the access network handover.
  • the anchor device monitors whether the signaling of the different mobility management protocol is received on the interface to which the IP address belongs, and forwards the intercepted signaling to the actual mobile protocol processing module for processing.
  • the anchor device supports both GTP and MIP mobility management protocols, with the HAIP address as the anchor IP address.
  • the HA IP address is registered to the anchor management device, which is the same as the general MIP protocol processing.
  • the mobile terminal moves to the network using GTP as the mobility management protocol, since the anchor IP address is the HA IP address and is different from the GTP-C address, it is necessary to listen to the user data packet protocol (UDP) on the anchor IP address. , User Datagram Protocol) port number, filter the GTP-C signaling message, and forward the filtered signaling message to the GTP protocol processing module for processing.
  • UDP user data packet protocol
  • the anchor device supports both the GTP and MIP mobility management protocols and uses the GTP-C IP address as the anchor IP address.
  • the mobile terminal uses the MIP protocol
  • IPv4 uses the UDP port number and IPv6 to move the extension header through the IP.
  • the MIP message is forwarded to the corresponding HA for processing, and the tunnel terminal address of the user plane terminal to the HA is That is, the real HA address can be carried in the MIP response message and returned to the other end device of the MIP tunnel.
  • the control plane anchor IP is the address of the GTP-C, which is the same as the general GTP protocol process.
  • the anchor address is identification information that can be addressed to the anchor point, and may be an anchor IP address or an anchor domain name. It is basically the same as the first embodiment described above, and therefore will not be further described herein.
  • FIG. 3 is a structural diagram of an embodiment of a mobile network system according to the present invention.
  • the mobile network system includes a mobile terminal 10, a non-3GPP access gateway 20, a 3GPP access network base station 30, an anchor device 40, an anchor management device 50, a mobility management entity 60, and a serving gateway 70.
  • the PDN GW can be used as the anchor device, and the HSS/AAA is used as the anchor management device.
  • the mobile terminal switches from the non-3GPP network to the 3GPP network.
  • the specific process for the mobile terminal 10 to access the non-3GPP network is:
  • the mobile terminal 10 initiates a mobile terminal access authentication request to the anchor management device 50 through the non-3GPP access gateway 20, and the anchor management device 50 performs access authentication on the mobile terminal 10.
  • the mobile terminal 10 After the access authentication, the mobile terminal 10 initiates a connection establishment request to the anchor device 40 by using the MIP protocol by the non-3GPP access gateway 20.
  • the anchor device 40 After receiving the connection establishment request, the anchor device 40 provides the anchor management device 50 with The anchor address corresponding to the MIP protocol returns a response message of the connection establishment request to the mobile terminal 10, and the mobile terminal successfully accesses the non-3GPP network.
  • the anchor management device 50 updates the saved anchor information according to the anchor address provided by the anchor device 40, the anchor information including at least one anchor address corresponding to the mobility management protocol of the anchor device.
  • the specific process of the mobile terminal 10 switching to the 3GPP network includes:
  • the mobile terminal 10 sends an attach request to the 3GPP network base station 30, and the 3GPP network base station 30 forwards the attach request to the mobility management entity 60, and the mobility management entity 60 sends an access authentication request to the mobile terminal 10 to the anchor management device 50;
  • the anchor management device 50 After the access authentication request, the anchor management device 50 sends an anchor address corresponding to the GTP protocol to the mobility management entity 60, and the mobility management entity 60 sends the GTP protocol through the serving gateway 70 according to the anchor address corresponding to the GTP protocol.
  • the bearer setup request is sent to the anchor device 40.
  • the anchor device 40 After receiving the bearer setup request, the anchor device 40 provides an anchor address corresponding to the GTP protocol to the anchor management device 50, and returns a response message of the bearer setup request to the mobility management entity 60.
  • the mobile terminal 10 successfully attaches to the 3GPP network.
  • the anchor management device includes a receiving unit, a storage unit, a selecting unit, and a sending unit.
  • the receiving unit is configured to receive an anchor point address corresponding to the mobility management protocol of the anchor device currently used by the mobile terminal, where the storage unit is configured to save anchor point information of the anchor point device, and receive according to the receiving unit Updating, an anchor address corresponding to the mobility management protocol, where the anchor information includes at least one anchor address corresponding to the mobility management protocol of the anchor device;
  • the selecting unit is configured to use the The anchor point obtained by the receiving unit selects an anchor address of the anchor device corresponding to the mobility management protocol used by the network to which the mobile terminal is switched;
  • the sending unit is configured to send the anchor address selected by the selecting unit Give the access gateway or mobile management entity.
  • the mobility management entity, the access gateway, or the serving gateway are all mobile access devices, and include an obtaining unit, a selecting unit, and a connection establishing unit.
  • the acquiring unit is configured to acquire an anchor point address corresponding to the mobility management protocol of the anchor device currently used by the mobile terminal, and the selecting unit is configured to select the anchor device and the mobile device according to the anchor point address acquired by the acquiring unit.
  • the anchor address corresponding to the mobility management protocol used by the network to which the terminal is switched; the connection establishing unit is configured to establish a connection according to the anchor address selected by the selecting unit by using a corresponding mobility management protocol.
  • the anchor address is identification information that can be addressed to the anchor point, and may be an anchor IP address or an anchor domain name. It is basically the same as the first embodiment described above, and therefore will not be further described herein.
  • the anchor point management device saves an anchor point address corresponding to multiple different mobility management protocols of the anchor point device, when the mobile terminal
  • the anchor management device provides the mobile terminal with an anchor address corresponding to another mobility management protocol of the anchor device, according to the The anchor address is set, and the connection of the mobile terminal to the access network is established. Therefore, the continuity of data services can be maintained when switching between access networks using different mobility management protocols.

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Description

接入网络切换方法、 锚点管理设备、 移动接入设备
本申请要求于 2007 年 7 月 12 日提交中国专利局、 申请号为 200710137421.9、 发明名称为"接入网络切换方法、 锚点管理设备 "的中国专利 申请的优先权, 要求于 2007 年 12 月 7 日提交中国专利局、 申请号为 200710195947.2、 发明名称为"接入网络切换方法、 锚点管理设备、 移动接入 设备"的中国专利申请的优先权, 其全部内容通过引用结合在本申请中。
技术领域
本发明涉及移动通信技术领域, 特别涉及一种接入网络切换方法、锚点管 理设备、 移动接入设备。
背景技术
目前, 典型的第三代合作伙伴计划 (3GPP, The 3rd Generation Partnership Project)标准组织定义的无线通信网络一般是由 3GPP无线接入网络和 3GPP无 线核心网络所构成的。
第三代移动通信系统架构演进 (SAE, 3GPP System Architecture Evolution) 网络支持 3GPP接入技术、 非 3GPP(non-3GPP)接入技术以及异种接入网络之 间的移动性。 SAE 网络中, 分组数据网关 (PDN GW, Packet Data Network Gateway)为移动终端分配 IP地址。 为了支持移动终端在异种无线接入网络之 间的移动性, SAE网络把 PDN GW作为异种系统间切换的锚点设备, 并由一 个网元例如归属用户服务器 (HSS, Home Subscriber Sever)/认证、 授权与计费 月良务器 (AAA Server, Authentication, Authorization and Accounting Sever)来管理 移动终端当前所使用的锚点信息。
当移动终端由一种接入网络切换到另一种接入网络时, 移动管理实体从 HSS/AAA中获取移动终端当前所使用的锚点, 并作为新的数据通道连接的目 标锚点。 这样, 只要切换前和切换后, 移动终端使用相同的锚点访问数据报文 网, 就能获取相同的 IP地址分配, 从而实现数据业务的连续性。 目前 SAE釆用 移动 IP(MIP, Mobile IP)协议来实现异种网络间的移动性。
例如, 移动终端从演进的通用移动通信系统 (UMTS, Universal Mobile Telecommunications System)陆地无线接入网(E-UTRAN, Evolved UMTS Terrestrial Radio Access Network)移动到无线局域网 (WLAN, Wireless Local Area Network), 移动终端在 E-UTRAN建立连接成功后, 把使用的 PDN GW 的家乡地址 (HA, Home Address)地址, 即 MIP 协议的 HA 地址, 保存在 HSS/AAA中。 移动终端切换到 WLAN时, 代理移动注册 IP代理 (PMA, Proxy Mobility Agent)从 HSS/AAA中获取已保存的 PDN GW的 HA地址,并向 PDN GW发送 PMIP注册请求 ,与 PDN GW建立 PMIP隧道,完成移动终端在 WLAN 接入网到 PDN GW的 IP连通性建立。 由于切换前后移动终端以相同的 IP地 址与 PDN GW建立 PMIP隧道, 因此可以实现数据业务的连续性。
上述现有技术中在异种接入技术的切换时, 釆用了相同的移动管理协议 MIP。 如果 3GPP接入技术也可以使用通用无线分组业务 (GPRS, General Packet Radio Service)隧道协议 (GTP, GPRS Tunneling Protocol)时, 异种接入技术的切 换就存在不同移动管理协议的切换, 如 GTP协议与 MIP协议之间的切换。
如果建立业务连接使用 GTP协议时,会在 HSS/AAA中保存 PDN GW的 GTP 控制面 (GTP-C)地址。 但与此同时, 对于 MIP协议, 会在 HSS/AAA中保存 PDN GW的 HA地址, 它是和分配给终端的业务地址相同网络的一个地址,是一个用 户面地址。 PDN GW的 HA地址和 GTP-C通常在 PDN GW上是两个不同的地址。
因此,在进行本发明创造过程中,发明人发现现有技术中至少存在如下问 题: 现有技术方案在使用不同移动管理协议的网络间切换时, 无法实现数据业 务的连续性。
发明内容
本发明实施例提供了一种接入网络切换方法、锚点管理设备、移动接入设 备, 能够使移动终端在釆用不同移动管理协议的接入网络间切换时,仍能保持 数据业务的连续性。
本发明实施例提供一种接入网络切换方法, 包括:
当移动终端从使用第一移动管理协议的第一网络移动至使用第二移动管 理协议的第二网络时,接入网关或者移动管理实体获取与所述第二移动管理协 议相对应的锚点地址,所述与第二移动管理协议相对应的锚点地址指示移动终 端在第一网络中使用的锚点设备;
所述接入网关或者移动管理实体根据所述与第二移动管理协议相对应的 锚点地址,使用所述第二种移动管理协议, 建立接入网关或者移动管理实体到 所述第二移动管理协议相对应的锚点地址指示的锚点设备的连接。 本发明实施例还提供一种锚点管理设备, 包括:
接收单元,用于接收移动终端当前使用的锚点设备与移动管理协议对应的 锚点地址;
存储单元, 用于记录所述锚点设备的锚点信息, 并根据所述接收单元接收 的与移动管理协议对应的锚点地址进行更新,所述锚点信息包括锚点设备的与 多种移动管理协议对应的锚点地址;
选择单元, 用于根据所述接收单元接收的锚点地址,选择所述锚点设备的 与移动终端切换到的网络使用的移动管理协议对应的锚点地址;
发送单元, 用于发送所述选择单元所选择的锚点地址。
本发明实施例还提供一种移动接入设备, 其包括:
获取单元,用于获取移动终端当前使用的锚点设备与移动管理协议对应的 锚点地址;
选择单元,用于根据所述获取单元获取的锚点地址选择所述锚点设备的与 移动终端切换到的网络使用的移动管理协议对应的锚点地址;
连接建立单元,用于根据所述选择单元所选择的锚点地址使用对应的移动 管理协议建立连接。
本发明实施例还提供一种接入网络切换系统, 包括: 使用第一移动管理协 议的第一网络、使用第二移动管理协议的第二网络、与所述第一网络相连的接 入网关、 与所述第二网络相连的移动管理实体, 其中:
当移动终端从所述第一网络移动至所述第二网络时,所述移动管理实体获 取与所述第二移动管理协议相对应的锚点地址,所述与第二移动管理协议相对 应的锚点地址指示移动终端在第一网络中使用的锚点设备;并根据所述与第二 移动管理协议相对应的锚点地址,使用所述第二种移动管理协议, 建立所述移 动管理实体到所述第二移动管理协议相对应的锚点地址指示的锚点设备的连 接;
当移动终端从所述第二网络移动至所述第一网络时 ,所述接入网关获取与 所述第一移动管理协议相对应的锚点地址,所述与第一移动管理协议相对应的 锚点地址指示移动终端在第二网络中使用的锚点设备;并根据所述与第一移动 管理协议相对应的锚点地址,使用所述第一种移动管理协议, 建立接入网关到 所述第一移动管理协议相对应的锚点地址指示的锚点设备的连接。
本发明实施例提供的接入网络切换方法、 锚点管理设备、 移动接入设备, 锚点管理设备保存了锚点设备的与多个不同移动管理协议对应的锚点地址,当 移动终端从使用一种移动管理协议的网络切换至使用另一种移动管理协议的 网络时,锚点管理设备向移动终端提供所述锚点设备的与另一种移动管理协议 对应的锚点地址, 根据所述锚点地址, 建立移动终端到接入网的连接。 因此在 釆用不同移动管理协议的接入网中切换时, 仍能保持数据业务的连续性。 附图说明
图 1为本发明接入网络切换方法第一实施例的信令流程图;
图 2为本发明接入网络切换方法第二实施例的信令流程图;
图 3为本发明移动网络系统一个实施例的结构示意图。
具体实施方式
为使本发明的技术方案更加清楚明白, 以下参照附图并列举实施例,对本 发明进一步详细说明。
请参照图 1 , 为本发明接入网络切换方法第一实施例的信令流程图。 本实 施例中, 移动终端 (UE, User Equipment)从 non-3GPP接入网络切换至 3GPP接 入网络。 所述接入网络切换过程包括:
步骤 101 :移动终端探测到 non-3GPP接入网络的信号,并连接到 non-3GPP 接入网络;
步骤 102: non-3GPP接入网关发现移动终端需要接入 SAE核心网, 向锚 点管理设备 HSS/AAA发送移动终端接入认证请求, non-3GPP接入网络在认 证过程中获取移动终端的签约信息;
步骤 103 : HSS/AAA对移动终端进行接入认证成功后, 由接入网关代理 移动终端, 使用 PMIP协议向锚点设备 PDN GW发起建立连接的请求;
本实施例中, non-3GPP接入网关发送 Binding Update (绑定更新)消息给分 组数据网关 PDN GW。 PDN GW作为移动终端的分组数据网关, 同时也是 non-3GPP/3GPP间移动的锚点设备, 支持多种移动管理协议, 因此具有与不同 移动管理协议对应的锚点地址。 例如, PDN GW具有与 PMIP协议对应的锚点 地址。
步骤 104: PDN GW接收所述建立连接的请求后, 向 HSS/AAA提供 PDN GW的与多种移动管理协议对应的锚点地址, HSS/AAA根据 PDN GW提供的 锚点地址更新已保存的锚点信息, HSS/AAA向 PDN GW返回锚点信息已更 新的响应消息;
本实施例中, HSS/AAA为锚点管理设备, 能够保存和维护锚点设备的锚 点信息, 所述锚点信息包括锚点设备的与不同移动管理协议对应的锚点地址; HSS/AAA还能够向移动管理实体、 接入网关或者移动终端提供移动终端当前 使用的锚点设备的锚点地址, 所述锚点地址与多种移动管理协议相对应。
步骤 105: PDN GW向接入网关返回响应消息。
本实施例中, PDN GW根据接入网关釆用 PMIP协议发送的 Binding Update 消息, 向接入网关返回 Binding Ack (绑定确认)消息。
上述步骤 101到步骤 105为移动终端基于 PMIP协议通过 non-3GPP接入 网络接入 SAE核心网的过程。
随着移动终端的位置移动,移动终端移动到 3GPP 的 E-UTRAN覆盖的无 线网络, 因此当前位置下的 non-3GPP接入信号变差, E-UTRAN的信号增强, 于是移动终端需要切换到 E-UTRAN接入网络。 3GPP的 E-UTRAN接入网络 使用 GTP作为移动管理协议。
步骤 106: 移动终端向 E-UTRAN接入网络的基站发送附着请求 (Attached Request);
步骤 107: E-UTRAN接入网络的基站转发所述附着请求给移动管理实体 (MME, Mobility Management Entity);
步骤 108: MME向 HSS/AAA发送移动终端接入认证请求, HSS/AAA对 移动终端完成接入认证, 并向 MME返回认证请求响应消息;
步骤 109: MME发起到 HSS/AAA的位置更新请求,将 MME地址登记到
HSS/AAA上, HSS/AAA同时下发移动终端的签约数据给 MME, 并将所保存 锚点信息中的与 GTP协议对应的锚点地址发送给 MME;
由于 HSS/AAA作为锚点管理设备, 能够保存和维护锚点设备的与不同移 动管理协议对应的锚点地址, 因此能够将所保存的与 GTP协议对应的锚点地 址发送给 MME。
HSS/AAA可以提供锚点设备与多种移动管理协议 (包括 GTP移动管理协 议)对应的多个锚点地址给 MME, 也可以仅提供与 GTP移动管理协议对应的 锚点地址, 即 GTP-C地址给 MME。
步骤 110: MME选择支持 GTP协议的服务网关 (Serving GW), 向其发送 承载建立请求 (Create Bearer Request),并且提供所述与 GTP协议对应的锚点地 址给所述 Serving GW;
当 HSS/AAA仅提供与 GTP移动管理协议对应的锚点地址给 MME时, MME仅提供与 GTP移动管理协议对应的锚点地址即 GTP-C地址给 Serving GW。
当 HSS/AAA提供锚点设备的与多种移动管理协议 (包括 GTP移动管理协 议)对应的多个锚点地址给 MME时, MME可以提供锚点设备与不同移动管理 协议(包括 GTP移动管理协议)对应的多个锚点地址给 Serving GW, 也可以选 择与 GTP移动管理协议对应的锚点地址即 GTP-C地址,并提供给 Serving GW。
步骤 111 : Serving GW根据与 GTP协议对应的锚点地址, 转发所述承载 建立请求给 PDN GW;
当 MME仅提供与 GTP移动管理协议对应的锚点地址给 Serving GW时, Serving GW根据 MME提供的与 GTP移动管理协议对应的锚点地址, 转发所 述承载建立请求给 PDN GW;
当 MME提供锚点设备的与多种移动管理协议(包括 GTP移动管理协议) 对应的多个锚点地址给 Serving GW时, 由于 Serving GW支持的协议是 GTP 协议, 因此 Serving GW选择与 GTP移动管理协议对应的锚点地址, 转发所述 承载建立请求给 PDN GW。
步骤 112: 接收所述承载建立请求后, PDN GW提供移动终端当前使用的 锚点设备与多种移动管理协议对应的锚点地址, HSS/AAA更新保存的锚点设 备的锚点信息;
步骤 113: PDN GW返回响应承载建立的应答消息 (Create Bearer Response) 给 Serving GW, 并携带移动终端当前使用锚点设备的锚点地址;
步骤 114: Serving GW转发响应承载建立应答消息给 MME, 并携带移动 终端当前使用锚点设备的锚点地址;
步骤 115: MME收到响应承载建立应答消息后, 发送移动终端当前使用 锚点设备的锚点地址给 HSS/AAA, HSS/AAA更新已保存的锚点设备的锚点信 息, HSS/AAA向 PDN GW返回锚点信息已更新的响应消息;
步骤 116: MME向 E-UTRAN接入网络的基站发送附着应答消息; 步骤 117: E-UTRAN接入网络的基站与移动终端之间建立无线承载; 步骤 118: E-UTRAN接入网络的基站向 MME返回附着完成的响应消息。 锚点管理设备获取和更新锚点设备的与多种移动管理协议对应锚点地址 的方式可以在移动终端发起网络建立连接的过程中, 由锚点设备、移动管理实 体或者移动终端向锚点管理设备提供移动终端当前使用的锚点设备与多种移 动管理协议对应的锚点地址。
例如,在本实施例步骤 104中,移动终端在 non-3GPP网络的接入认证后, 由锚点设备 PDN GW提供移动终端当前使用的锚点设备与多种移动管理协议 对应的锚点地址给锚点管理设备 HSS/AAA进行更新;
在步骤 112中, 移动终端切换到 3GPP网络时, 在承载建立请求过程中, 由锚点设备 PDN GW提供移动终端当前使用的锚点设备与多种移动管理协议 对应的锚点地址给锚点管理设备 HSS/AAA进行更新;
在步骤 115中, 移动终端切换到 3GPP网络时, 在承载建立请求后, 由移 动管理实体提供移动终端当前使用的锚点设备与多种移动管理协议对应的锚 点地址给锚点管理设备 HSS/AAA进行更新。
可以选择通过步骤 104、 112、 115的其中一个或者多个向锚点管理设备提 供移动终端当前使用的锚点设备与多种移动管理协议对应的锚点地址。
所述锚点地址是能寻址到锚点的标识信息, 可以为锚点的 IP地址或者锚 点域名等。
当锚点地址是锚点设备 IP地址时, 所述与某种移动管理协议对应的锚点 地址其具体形式可以是 IP地址与对应的协议信息, 例如: GTP IP1 ; 与多种 移动管理协议对应的锚点地址其具体形式可以是多个 IP地址与不同移动管理 协议的对应关系, 例如, GTP〜: 1P1 ; PMIP - IP2; 与多种移动管理协议对应的 锚点地址其具体形式可以是一个 IP地址与不同移动管理协议的对应关系, 例 如, GTP - IP1; PMIP ~ IP1。
当锚点地址是锚点设备域名时,所述与某种移动管理协议对应的锚点地址 其具体形式可以是域名及对应的协议信息 GTP~sina.com或者域名包含协议信 息 sina.GTP.com;相应的所述与多种移动管理协议对应的锚点地址的具体形式 可以是多个域名及对应的协议信息, 例如: GTP〜域名 1、 PMIP〜域名 2, 或者 多个包含多种协议信息的域名, 例如, sina.GTP.com, sina.PMIP.com, 或者不 包含协议信息部分的域名, 例如: sina.com, 协议信息需要由选择协议的网元, 即 MME、 接入网关、 或者 Serving GW添加, 例如, MME选择使用 GTP协 议, 则解析域名时构造域名为 sina.GTP.com。
在步骤 109中, 当 MME、 接入网关、 或者 Serving GW获取的锚点地址 是与多种移动管理协议对应的锚点地址时, MME、接入网关、或者 Serving GW 可以根据自己的配置或策略选择一种移动管理协议,并使用该移动管理协议对 应的锚点地址, 建立到所述锚点地址指示的锚点设备的连接。 其具体方式为: 当与多种移动管理协议对应的锚点地址是与多种移动管理协议对应的多 个锚点 IP地址, MME、 接入网关、 或者 Serving GW根据自己的配置或策略 选择一种移动管理协议, 并使用该移动管理协议对应的锚点 IP地址作为目的 锚点设备的 IP地址, 建立到所述 IP地址指示的锚点设备的连接;
当与多种移动管理协议对应的锚点地址是与多种移动管理协议对应的锚 点域名时, MME、 接入网关、 或者 Serving GW可以根据自己的配置或策略选 择一种移动管理协议, 并使用该移动管理协议对应的锚点域名, 包括如上述方 式构造该移动管理协议对应的锚点域名, 然后通过域名解析服务获取锚点 IP 地址, 并使用该锚点 IP地址作为目的锚点设备的 IP地址, 建立到所述 IP地 址指示的锚点设备的连接。
所述的域名解析服务可以由 MME、 接入网关、 或者 Serving GW自己提 供, 或者通过第三方域名解析服务器 (DNS Domain Name Server)提供。 请参照 图 2, 为本发明接入网络切换方法第二实施例的信令流程图。 本实施例中, 移 动终端从 3GPP接入网络切换至 non-3GPP接入网络。 所述接入网络之间的切 换过程包括:
步骤 201: 移动终端向 3GPP接入网络的基站发送附着请求; 本实施例中, 3GPP接入网络为 E-UTRAN网络。 E-UTRAN网络釆用 GTP 作为移动管理协议。
步骤 202: 3GPP接入网络的基站转发所述附着请求给 MME;
步骤 203: MME向 HSS/AAA发送移动终端接入认证请求, HSS/AAA对 移动终端完成接入认证, 并向 MME返回认证请求响应消息;
步骤 204: MME发起到 HSS/AAA的位置更新请求,将 MME地址登记到 HSS/AAA上, HSS/AAA同时下发移动终端的签约数据给 MME, 并将所保存 的与 GTP协议对应的锚点地址发送给 MME;
本实施例中, HSS/AAA为锚点管理设备, 能够保存和维护锚点设备的锚 点信息, 所述锚点信息包括锚点设备的与不同移动管理协议对应的锚点地址; HSS/AAA还能够向移动管理实体、 接入网关或者移动终端提供移动终端当前 使用的锚点设备的锚点地址, 所述锚点地址与多种移动管理协议相对应。
HSS/AAA可以提供锚点设备与多种移动管理协议 (包括 GTP移动管理协 议)对应的多个锚点地址给 MME, 也可以仅提供与 GTP移动管理协议对应的 锚点地址, 即 GTP-C地址给 MME。 如果是终端第一次接入 HSS/AAA没有提 供锚点地址, 则 MME可以根据其他信息(例如, 接入点名 APN )或策略(例 如, 支持 GTP协议)选择一个锚点。
步骤 205: MME选择支持 GTP协议的 Serving GW, 向其发送承载建立请 求, 并且提供 PDN GW所分配的与 GTP协议对应的锚点地址给所述 Serving GW;
当 HSS/AAA仅提供与 GTP移动管理协议对应的锚点地址给 MME时, MME仅提供与 GTP移动管理协议对应的锚点地址给 Serving GW, 即 GTP-C 地址。
当 HSS/AAA提供锚点设备的与多种移动管理协议 (包括 GTP移动管理协 议)对应的多个锚点地址给 MME时, MME可以提供锚点设备与不同移动管理 协议(包括 GTP移动管理协议)对应的多个锚点地址给 Serving GW, 也可以选 择与 GTP移动管理协议对应的锚点地址并提供给 Serving GW,即 GTP-C地址。
步骤 206: Serving GW根据与 GTP协议对应的锚点地址, 转发所述承载 建立请求给 PDN GW; 当 MME仅提供与 GTP移动管理协议对应的锚点地址给 Serving GW时, Serving GW根据 MME提供的与 GTP移动管理协议对应的锚点地址, 转发所 述承载建立请求给 PDN GW;
当 MME提供锚点设备的与多种移动管理协议(包括 GTP移动管理协议) 对应的多个锚点地址给 Serving GW时, 由于 Serving GW支持的协议是 GTP 协议, 因此 Serving GW选择与 GTP移动管理协议对应的锚点地址, 转发所述 承载建立请求给 PDN GW。
步骤 207: 接收所述承载建立请求后, PDN GW提供移动终端当前使用的 锚点设备与多种移动管理协议对应的锚点地址给 HSS/AAA, HSS/AAA更新保 存的锚点设备的锚点信息;
步骤 208: PDN GW返回响应承载建立的应答消息给 Serving GW, 并携 带移动终端当前使用锚点设备的锚点地址;
步骤 209: Serving GW转发响应承载建立应答消息给 MME, 并携带移动 终端当前使用锚点设备的锚点地址;
步骤 210: MME收到响应承载建立应答消息后, 转发移动终端当前使用 锚点设备的锚点地址给 HSS/AAA, HSS/AAA 更新保存的锚点设备的锚点信 息, HSS/AAA向 PDN GW返回锚点信息已更新的响应消息;
步骤 211 : MME向 3GPP接入网络的基站发送附着应答消息;
步骤 212: 3GPP接入网络的基站与移动终端之间建立无线承载; 步骤 213: 3GPP接入网络的基站向 MME返回附着完成的响应消息。 上述步骤 201到步骤 213为移动终端基于 GTP协议通过 3GPP接入网络 接入 SAE核心网的过程。
随着移动终端的位置移动, 移动终端移动到 non-3GPP覆盖的无线网络, 因此当前位置下的 E-UTRAN接入信号变差, non-3GPP接入网的信号增强, 于是移动终端需要切换到 non-3GPP 的接入网络。 non-3GPP接入网络使用 PMIP作为移动管理协议。
步骤 214: 移动终端与 non-3GPP接入网络建立连接;
步骤 215: non-3GPP接入网络发现移动终端需要接入 SAE核心网, 向 HSS/AAA发送移动终端接入认证请求, non-3GPP接入网络在认证过程中获取 移动终端的签约信息, 且在 HSS/AAA对移动终端进行接入认证成功后, HSS/AAA将移动终端当前使用的锚点设备与 PMIP协议对应的锚点地址提供 给接入网关;
步骤 216: 接入网关代理移动终端, 根据与 PMIP协议对应的锚点地址, 使用 PMIP协议, 向 PDN GW发起建立连接的请求;
本实施例中, 接入网关发送 Binding Update (绑定更新)消息给 PDN GW。 PDN GW作为移动终端的分组数据网关, 同时也是 non-3GPP/3GPP间移动的 锚点设备, 支持多种移动管理协议, 因此具有与不同移动管理协议对应的锚点 地址。 例如, PDN GW具有与 PMIP协议对应的锚点地址。
步骤 217 : PDN GW 接收所述建立连接的请求后, 向锚点管理设备
HSS/AAA提供移动终端当前使用的锚点设备与多种移动管理协议对应的锚点 地址, HSS/AAA根据 PDN GW提供的锚点地址更新已保存的锚点信息, HSS/AAA向 PDN GW返回锚点信息已更新的响应消息;
步骤 218: PDN GW向接入网关返回响应消息。
本实施例中 , PDN GW向接入网关返回 Binding Ack (绑定确认)消息。 锚点管理设备获取和更新锚点设备的与多种移动管理协议对应锚点地址 的方式可以在移动终端发起网络建立连接的过程中, 由锚点设备、移动管理实 体或者移动终端向锚点管理设备提供移动终端当前使用的锚点设备与多种移 动管理协议对应的锚点地址。
例如, 在本实施例的步骤 207中, 移动终端在 3GPP网络中的承载建立请 求过程中, 由锚点设备 PDN GW提供移动终端当前使用的锚点设备与多种移 动管理协议对应的锚点地址给锚点管理设备 HSS/AAA进行更新;
在步骤 210中, 移动终端在 3GPP网络中的承载建立请求后, 由移动管理 实体提供移动终端当前使用的锚点设备与多种移动管理协议对应的锚点地址 给锚点管理设备 HSS/AAA进行更新。
在本实施例步骤 217中, 移动终端切换到 non-3GPP网络时, 在接入认证 后, 由锚点设备 PDN GW提供移动终端当前使用的锚点设备与多种移动管理 协议对应的锚点地址给锚点管理设备 HSS/AAA进行更新。
可以选择通过步骤 207、 210、 217的其中一个或者多个向锚点管理设备提 供移动终端当前使用的锚点设备与多种移动管理协议对应的锚点地址。
本发明实施例还提供另一种接入网络切换方法。在接入网切换过程中使用 某个 IP地址作为移动管理协议的锚点 IP地址。 锚点设备在所述 IP地址所属 的接口上,监听是否有接收到不同移动管理协议的信令,把截获的信令转交到 实际的移动协议处理模块进行处理。
例如, 锚点设备同时支持 GTP与 MIP移动管理协议, 并以 HAIP地址作 为锚点 IP地址。
移动终端使用 MIP协议时, MIP连接建立成功后, 登记所述 HA IP地址 到锚点管理设备,与一般 MIP协议处理过程相同。当移动终端移动到使用 GTP 作移动管理协议的网络时, 由于锚点 IP地址是 HA IP地址, 与 GTP-C地址不 同, 这时, 需要在锚点 IP地址上监听用户数据报文协议 (UDP, User Datagram Protocol)端口号, 筛选 GTP-C的信令报文, 把筛选到的信令报文转交到 GTP 协议处理模块进行处理。
再例如, 锚点设备同时支持 GTP与 MIP移动管理协议, 并以 GTP-C IP 地址作为锚点 IP地址。
移动终端使用 MIP协议时, 由于 GTP-C IP地址一般不是 HA IP地址, 因 此需要在 GTP-C IP地址上监听是否有 MIP信令注册消息 (IPv4通过 UDP端口 号、 IPv6通过 IP移动扩展头),再通过解析报文家乡地址 (HoA, Home Address) 地址或者扩展携带的要访问的外部网络的信息,转交此 MIP报文给相应的 HA 进行处理, 对于用户面终端到 HA的隧道终端地址, 即真实的 HA地址, 可以 携带在 MIP应答消息中返回给 MIP隧道的另一端设备。 当移动终端移动到使 用 GTP作为移动管理协议的网络时, 控制面锚点 IP就是 GTP-C的地址, 与 一般 GTP协议处理过程相同。
所述锚点地址是能寻址到锚点的标识信息, 可以为锚点的 IP地址或者锚 点域名等。 与上述实施例一基本相同, 因此这里不再进一步描述。
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步骤 是可以通过程序来指令相关的硬件来完成,所述的程序可以存储于一计算机可 读取存储介质中, 所述的存储介质, 如: ROM/RAM、 磁碟、 光盘等。
请参照图 3 , 为本发明移动网络系统一个实施例的结构图。 如图 3所示, 该移动网络系统包括移动终端 10、 non-3GPP接入网关 20、 3GPP接入网络基站 30、 锚点设备 40、 锚点管理设备 50、 移动管理实体 60以 及服务网关 70。 可以釆用 PDN GW作为所述锚点设备, 釆用 HSS/AAA作为 所述锚点管理设备。
本实施例中, 移动终端从 non-3GPP网络切换至 3GPP网络。
移动终端 10接入 non-3GPP网络的具体过程为:
移动终端 10通过 non-3GPP接入网关 20向锚点管理设备 50发起移动终 端接入认证请求, 锚点管理设备 50对移动终端 10进行接入认证;
接入认证后, 移动终端 10通过 non-3GPP接入网关 20使用 MIP协议, 向 锚点设备 40发起连接建立请求, 锚点设备 40接收所述连接建立请求后, 向 锚点管理设备 50提供与 MIP协议对应的锚点地址, 并向移动终端 10返回连 接建立请求的响应消息, 移动终端成功接入 non-3GPP网络。锚点管理设备 50 根据锚点设备 40提供的锚点地址, 更新保存的锚点信息, 所述锚点信息包括 锚点设备的至少一个与移动管理协议对应的锚点地址。
移动终端 10切换至 3GPP网络具体过程包括:
移动终端 10向 3GPP网络基站 30发送附着请求, 3GPP网络基站 30转发 所述附着请求给移动管理实体 60, 移动管理实体 60发送对移动终端 10的接 入认证请求给锚点管理设备 50;
接入认证请求后,锚点管理设备 50发送与 GTP协议对应的锚点地址给移 动管理实体 60, 移动管理实体 60根据与 GTP协议对应的锚点地址, 通过服 务网关 70发送釆用 GTP协议的承载建立请求给锚点设备 40, 锚点设备 40接 收所述承载建立请求后,向锚点管理设备 50提供与 GTP协议对应的锚点地址, 并向移动管理实体 60返回承载建立请求的响应消息, 移动终端 10成功附着 3GPP网络。
其中,所述锚点管理设备包括接收单元、存储单元、选择单元和发送单元。 所述接收单元用于接收移动终端当前使用的锚点设备与移动管理协议对应的 锚点地址; 所述存储单元用于保存所述锚点设备的锚点信息, 并根据所述接收 单元接收的与移动管理协议对应的锚点地址进行更新,所述锚点信息包括锚点 设备的至少一个与移动管理协议对应的锚点地址;所述选择单元用于根据所述 接收单元获取的锚点地址选择所述锚点设备的与移动终端切换到的网络使用 的移动管理协议对应的锚点地址;所述发送单元用于将所述选择单元所选择的 锚点地址发送给接入网关或移动管理实体。
所述移动管理实体、接入网关或者服务网关均为移动接入设备, 其包括获 取单元、 选择单元、 连接建立单元。 所述获取单元用于获取移动终端当前使用 的锚点设备与移动管理协议对应的锚点地址;所述选择单元用于根据所述获取 单元获取的锚点地址选择所述锚点设备的与移动终端切换到的网络使用的移 动管理协议对应的锚点地址;所述连接建立单元用于根据所述选择单元所选择 的锚点地址使用对应的移动管理协议建立连接。
所述锚点地址是能寻址到锚点的标识信息, 可以为锚点的 IP地址或者锚 点域名等。 与上述实施例一基本相同, 因此这里不再进一步描述。
通过本发明实施例提供的接入网络切换方法、锚点管理设备、移动接入设 备, 锚点管理设备保存了锚点设备的与多个不同移动管理协议对应的锚点地 址,当移动终端从使用一种移动管理协议的网络切换至使用另一种移动管理协 议的网络时,锚点管理设备向移动终端提供所述锚点设备的与另一种移动管理 协议对应的锚点地址, 根据所述锚点地址, 建立移动终端到接入网的连接。 因 此在釆用不同移动管理协议的接入网中切换时, 仍能保持数据业务的连续性。
以上对本发明所提供的一种接入网络切换方法、锚点管理设备、移动接入 了阐述,以上实施例的说明只是用于帮助理解本发明所揭示的技术方案;同时, 对于本领域的一般技术人员,依据本发明的思想, 在具体实施方式及应用范围 上均会有改变之处, 综上所述, 本说明书内容不应理解为对本发明的限制。

Claims

权 利 要 求
1.一种接入网络切换方法, 其特征在于, 所述方法包括:
当移动终端从使用第一移动管理协议的第一网络移动至使用第二移动管 理协议的第二网络时,接入网关或者移动管理实体获取与所述第二移动管理协 议相对应的锚点地址,所述与第二移动管理协议相对应的锚点地址指示移动终 端在第一网络中使用的锚点设备;
所述接入网关或者移动管理实体根据所述与第二移动管理协议相对应的 锚点地址,使用所述第二种移动管理协议, 建立接入网关或者移动管理实体到 所述第二移动管理协议相对应的锚点地址指示的锚点设备的连接。
2. 根据权利要求 1 所述的接入网络切换方法, 其特征在于, 所述接入网 关或者移动管理实体从锚点管理设备获取与所述第二移动管理协议相对应的 锚点地址。
3. 根据权利要求 1 所述的接入网络切换方法, 其特征在于, 所述方法还 包括:
所述接入网关或者移动管理实体从锚点管理设备获取与移动管理协议相 对应的锚点地址之前,锚点设备、移动管理实体或者移动终端向锚点管理设备 提供锚点设备与移动管理协议相对应的锚点地址,其中包括与第二移动管理协 议相对应的锚点地址。
4. 根据权利要求 3 所述的接入网络切换方法, 其特征在于, 所述锚点设 备向锚点管理设备提供与第二移动管理协议相对应的锚点地址包括:
对移动终端进行接入认证后 ,锚点设备向锚点管理设备提供移动终端当前 使用的锚点设备与移动管理协议对应的锚点地址;
所述锚点管理设备保存所述锚点设备提供的与移动管理协议对应的锚点 地址。
5. 根据权利要求 3 所述的接入网络切换方法, 其特征在于, 所述锚点设 备向锚点管理设备提供与第二移动管理协议相对应的锚点地址包括:
在承载建立请求过程中,锚点设备向锚点管理设备提供移动终端当前使用 的锚点设备与移动管理协议对应的锚点地址;
所述锚点管理设备保存所述锚点设备提供的与移动管理协议对应的锚点 地址。
6. 根据权利要求 3 所述的接入网络切换方法, 其特征在于, 所述移动管 理实体向锚点管理设备提供与第二移动管理协议相对应的锚点地址包括:
在承载建立请求过程中,移动管理实体向锚点管理设备提供移动终端当前 使用的锚点设备与移动管理协议对应的锚点地址;
所述锚点管理设备保存所述移动管理实体提供的与移动管理协议对应的 锚点地址。
7. 根据权利要求 6所述的接入网络切换方法, 其特征在于, 所述移动管 理实体向所述锚点管理设备提供的与第二移动管理协议相对应的锚点地址,是 由锚点设备提供给移动管理实体的。
8. 根据权利要求 1-7中任一项所述的接入网络切换方法,其特征在于,所 述与移动管理协议对应的锚点地址为与移动管理协议对应的锚点 IP地址或者 与移动管理协议对应的锚点域名。
9. 根据权利要求 8所述的接入网络切换方法, 其特征在于, 所述与移动 管理协议对应的锚点域名中包括对应的移动管理协议信息。
10. 根据权利要求 9所述的接入网络切换方法, 其特征在于, 所述与移动 管理协议对应的锚点地址为与多种移动管理协议对应的锚点 IP地址;
所述建立接入网关或者移动管理实体到所述与第二移动管理协议相对应 的锚点地址指示的锚点设备的连接包括:
所述移动管理实体或者接入网关根据自己的配置或策略选择一种移动管 理协议作为第二移动管理协议, 并使用所述第二移动管理协议对应的锚点 IP 地址作为目的锚点设备的 IP地址,建立到所述 IP地址指示的锚点设备的连接。
11. 根据权利要求 8所述的接入网络切换方法, 其特征在于, 所述与移动 管理协议对应的锚点地址为与多种移动管理协议对应的锚点域名;
所述建立接入网关或者移动管理实体到所述与第二移动管理协议相对应 的锚点地址指示的锚点设备的连接包括:
所述移动管理实体或者接入网关根据自己的配置或策略选择一种移动管 理协议作为第二移动管理协议,并将所述第二移动管理协议对应的锚点域名进 行域名解析, 获取锚点 IP地址, 并使用该锚点 IP地址作为目的锚点设备的 IP 地址, 建立到所述 IP地址指示的锚点设备的连接。
12. 根据权利要求 11 所述的接入网络切换方法, 其特征在于, 当所述第 二移动管理协议对应的锚点域名中未包含所述第二移动管理协议信息时,所述 将第二移动管理协议对应的锚点域名进行域名解析, 获取锚点 IP地址包括: 在所述第二移动管理协议对应的锚点域名中添加所述第二移动管理协议 信息;
对添加了所述第二移动管理协议信息的锚点域名进行域名解析,获取锚点 IP地址。
13. 一种锚点管理设备, 其特征在于, 包括:
接收单元,用于接收移动终端当前使用的锚点设备与移动管理协议对应的 锚点地址;
存储单元, 用于记录所述锚点设备的锚点信息, 并根据所述接收单元接收 的与移动管理协议对应的锚点地址进行更新,所述锚点信息包括锚点设备的与 多种移动管理协议对应的锚点地址;
选择单元, 用于根据所述接收单元接收的锚点地址,选择所述锚点设备的 与移动终端切换到的网络使用的移动管理协议对应的锚点地址;
发送单元, 用于发送所述选择单元所选择的锚点地址。
14. 根据权利要求 13 所述的锚点管理设备, 其特征在于, 所述锚点管理 设备为归属用户服务器或者认证、 授权与计费服务器。
15. 一种移动接入设备, 其特征在于, 包括:
获取单元,用于获取移动终端当前使用的锚点设备与移动管理协议对应的 锚点地址;
选择单元,用于根据所述获取单元获取的锚点地址选择所述锚点设备的与 移动终端切换到的网络使用的移动管理协议对应的锚点地址;
连接建立单元,用于根据所述选择单元所选择的锚点地址使用对应的移动 管理协议建立连接。
16. 根据权利要求 15所述的移动接入设备, 其特征在于, 所述移动接入 设备为移动管理实体、 接入网关或者服务网关。
17. 一种接入网络切换系统, 包括: 使用第一移动管理协议的第一网络、 使用第二移动管理协议的第二网络、与所述第一网络相连的接入网关、 与所述 第二网络相连的移动管理实体, 其特征在于:
当移动终端从所述第一网络移动至所述第二网络时,所述移动管理实体获 取与所述第二移动管理协议相对应的锚点地址,所述与第二移动管理协议相对 应的锚点地址指示移动终端在第一网络中使用的锚点设备;并根据所述与第二 移动管理协议相对应的锚点地址,使用所述第二种移动管理协议, 建立所述移 动管理实体到所述第二移动管理协议相对应的锚点地址指示的锚点设备的连 接;
当移动终端从所述第二网络移动至所述第一网络时 ,所述接入网关获取与 所述第一移动管理协议相对应的锚点地址,所述与第一移动管理协议相对应的 锚点地址指示移动终端在第二网络中使用的锚点设备;并根据所述与第一移动 管理协议相对应的锚点地址,使用所述第一种移动管理协议, 建立接入网关到 所述第一移动管理协议相对应的锚点地址指示的锚点设备的连接。
18. 根据权利要求 17所述的接入网络切换系统, 其特征在于, 还包括: 锚点管理设备,用于接收并存储移动终端当前使用的锚点设备与移动管理 协议对应的锚点地址;
所述接入网关从所述锚点管理设备获取与所述第二移动管理协议相对应 的锚点地址;
所述移动管理实体从所述锚点管理设备获取与所述第一移动管理协议相 对应的锚点地址。
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