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WO2004112319A1 - Procede de demande d'informations d'acheminement dans un environnement wlan interagissant avec un reseau mobile - Google Patents

Procede de demande d'informations d'acheminement dans un environnement wlan interagissant avec un reseau mobile Download PDF

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Publication number
WO2004112319A1
WO2004112319A1 PCT/CN2004/000646 CN2004000646W WO2004112319A1 WO 2004112319 A1 WO2004112319 A1 WO 2004112319A1 CN 2004000646 W CN2004000646 W CN 2004000646W WO 2004112319 A1 WO2004112319 A1 WO 2004112319A1
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WO
WIPO (PCT)
Prior art keywords
authentication server
routing
user
packet data
address
Prior art date
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Ceased
Application number
PCT/CN2004/000646
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English (en)
Chinese (zh)
Inventor
Zhiming Li
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Filing date
Publication date
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Publication of WO2004112319A1 publication Critical patent/WO2004112319A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H04L45/42—Centralised routing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/06—Authentication
    • H04W12/062—Pre-authentication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/24—Connectivity information management, e.g. connectivity discovery or connectivity update
    • H04W40/246—Connectivity information discovery
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/26—Network addressing or numbering for mobility support
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/10—Small scale networks; Flat hierarchical networks
    • H04W84/12—WLAN [Wireless Local Area Networks]

Definitions

  • the present invention relates to a route query technology in wireless communication, and in particular, to a method for querying a route in the case of interworking between a wireless local area network and a Third Generation Partnership Project (WLAN-3GPP) network.
  • WLAN-3GPP Third Generation Partnership Project
  • WLAN and wireless mobile communication networks include the Global System for Mobile Communications (GSM), Code Division Multiple Access (CDMA), Wideband Code Division Multiple Access (WCDMA), Time Division Synchronous Code Division Multiple Access (TD) -SCDMA) and the integration of CDMA2000 and other networks are becoming the focus of current research.
  • GSM Global System for Mobile Communications
  • CDMA Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • TD-SCDMA Time Division Synchronous Code Division Multiple Access
  • CDMA2000 belongs to 3GPP2.
  • 3GPP TS23.234 defines the WLAN-3GPP interworking scenario 3 as follows: After the UE is authorized by the 3GPP home network service, a tunnel establishment process is performed between the UE and the PDG. At this time, the PDG's subscription information and tunnel information are stored in the PDG. And other related information, this process is a mobile station initiated (MO) process.
  • MO mobile station initiated
  • FIG. 1 a simplified network structure diagram in a non-roaming scenario where a WLAN and a 3GPP network interworking scenario 3 is not shown.
  • the WLAN access network 102 is directly connected to the external Internet (intranet) or intranet (intranet) 104, and the user equipment (UE) 101 and the 3GPP home network (3GPP Home Network) 3GPP authentication and authorization plan respectively through the WLAN access network 102
  • a charge server (AS, 3GPP AAA Server) 103 is connected to a packet data gateway (PDG, Packet Data Gateway) 105, and the PDG 105 is connected to a packet data network (PDN, Packet Data Network) that is part of an external network through a Wi interface.
  • PDG Packet Data Gateway
  • the UE 101 may apply for a service of the interworking scenario 2 to the 3GPP home network. If the UE 101 also wants to access 3GPP packet switching (PS) domain services, and accesses the PDN through the WLAN-3GPP network, it may further apply to the 3GPP home network for an interworking scenario 3 service. That is, the UE 101 initiates a service authorization process request for the interworking scenario 3 to the AS 103 of the 3GPP home network. The AS 103 of the 3GPP home network performs service authentication and authorization on the service request. If successful, the AS 103 sends an access permission message to the user.
  • PS packet switching
  • the AS 103 allocates the corresponding PDG 105 to the UE 101, and a tunnel is established between the UE 101 and the allocated PDG 105.
  • the charging gateway (CGw) 107a / charging information collection system (CCF) 107a / online charging system (OCS) 107b records charging information according to the network usage of the UE 101.
  • the tunnel established for non-roaming situations is UE-WLAN-PDG.
  • the UE 101 can access the 3GPP PS domain services, and the UE 101 can communicate with the PDN belonging to the external network through the tunnel with the PDG 105.
  • the PDN includes all packet data networks other than mobile networks such as Intemet and Intranet.
  • the roaming situation in the WLAN access network and 3GPP interworking scenario 3 is similar to the non-roaming situation, and its tube network structure is shown in FIG. 2.
  • the WLAN access network 102 is connected to the 3GPP home network through a 3GPP Visited Network.
  • the WLAN access network 102 is connected to a UE 101, a 3GPP AAA server proxy (AS Proxy) 201, an Internet / Intranet 104, and a wireless access gateway (WAG) 202.
  • the UE 101 may apply to the 3GPP home network for the interworking scenario 2 service access to the Internet / Intranet 104 through the 3GPP access network.
  • the UE 101 needs to initiate a service authorization process to the 3GPP home network through the 3GPP access network. This process is also between the UE 101 and the AS 103 of the 3GPP home network.
  • the AS 103 allocates the corresponding home PDG 105 to the UE 101, and the UE 101 establishes a tunnel between the WAG 202 and the allocated PDG 105 through the 3GPP access network.
  • the established tunnel is UE-WLAN-WAG-PDG.
  • UE 101 can access 3GPP PS domain services of the home network.
  • the UE can access the 3GPP PS domain services through the PDG, that is, after the data sent by the UE reaches the PDG through the tunnel, the PDG decapsulates the data. The data is then sent to the external network via the Wi interface.
  • the main object of the present invention is to provide a method for querying a route in a WLAN-3GPP interworking network, so that the PDG device can easily query the route to the authentication server to which the target UE belongs.
  • a method for querying routing in the case of wireless local area network and mobile network interworking includes the following steps: a) storing an IP address and a user identification of a user equipment in a packet data gateway, and establishing a mapping relationship between the IP address and the user identification;
  • the data of the external network reaches the packet data gateway and triggers a routing query, and the packet data gateway searches for the user ID corresponding to the IP address in itself according to the IP address of the target user equipment contained in the received data;
  • the packet data gateway sends a routing query request including the user identity to the routing storage device
  • the routing registration device searches for the authentication service to which the current target user equipment belongs according to the mapping relationship between the user identifier of the contracted user equipment established by itself and the routing information of the associated authentication server.
  • the router routes information and returns the search results.
  • the user identity of the user equipment is an international mobile subscription user identity (IMSI) of the user equipment, or a wireless local area network temporary mobile subscription user identity (WTMSI).
  • IMSI international mobile subscription user identity
  • WTMSI wireless local area network temporary mobile subscription user identity
  • the route registration device is a home subscription user service device.
  • Step a) further includes: establishing a communication connection between the packet data gateway and the route registration device.
  • the routing storage device in this method is a home subscription user service device
  • Step c) further includes: the packet data gateway sends a routing query request to an authentication server connected to the packet data gateway, and the authentication server forwards the query request to the routing storage device;
  • Step d) further includes: the routing registration device sends the search result to the authentication server, and the authentication server forwards the search result to the packet data gateway.
  • the routing storage device in the method is a home subscription user service device and an authentication server connected to the packet data gateway; and further includes:
  • the packet data gateway sends a routing query request to the authentication server, and the authentication server searches for the routing information of the authentication server to which the current target user equipment belongs in itself, and if found, returns the packet server to the packet data gateway.
  • the response information of the routing information ends the routing query process; otherwise, the authentication server forwards the routing query request to the home subscription user service device;
  • the home subscription user service device searches itself for the routing information of the authentication server to which the current target user equipment belongs, and if found, returns the response information containing the routing information of the authentication server to the authentication server; otherwise, returns to the authentication server Carry response information with error reason;
  • the authentication server forwards the received response information to the packet data gateway.
  • the method further includes: the authentication server includes the target user equipment included in the response message The own authentication server route is saved.
  • the route registration device is an authentication server connected to the packet data gateway.
  • Step a) further includes: storing in the authentication server the routing information of the authentication servers to which all contracted user equipment belongs, and establishing each contracted user. The mapping relationship between the device user ID and the routing information of the authentication server to which it belongs.
  • the authentication server is a 3GPP authentication, authorization and accounting server (AS), and the routing information of the authentication server is an address of the AS.
  • AS 3GPP authentication, authorization and accounting server
  • the home subscription user service device is a home subscription user server (HSS).
  • the home subscription user service device is a home location register (HLR)
  • step a) further includes: saving the routing information of the authentication server to which the subscription user device belongs in the home location register, and establishing the user identity and belonging of the subscription user device. Mapping relationship of authentication server routing information.
  • the method for querying routing in the interworking network of the present invention implements the WLAN-3GPP interworking network by configuring related information of the contracted mobile user equipment in the packet data gateway and querying the routing storage device.
  • the query on the routing of the authentication server to which the target UE belongs, thereby laying a foundation for the external network data to be sent to the user equipment through the WLAN-3GPP interworking network.
  • FIG. 1 is a schematic structural diagram of a non-roaming scenario in a WLAN and 3GPP network interworking scenario
  • FIG. 2 is a schematic structural diagram of a roaming situation in a WLAN and 3GPP network interworking scenario
  • FIG. 3 is a schematic structural diagram of a network structure according to Embodiment 1 of the present invention
  • FIG. 5 is a schematic diagram of a network structure according to Embodiments 2 and 3 of the present invention.
  • FIG. 8 is a schematic diagram of a network structure according to Embodiment 4 of the present invention.
  • FIG. 9 is a working flowchart of Embodiment 4 of the present invention. Mode of Carrying Out the Invention
  • the information about the UE stored in the home subscription service device of the 3GPP network includes: the user identity of the UE, the subscription information of the UE, and the security parameters of the UE.
  • the address of the AS to which the UE belongs is also stored in the HLR / HSS, and it is stored in the 3GPP AS: the user identity of the UE, the HLR / HSS address, the status information of the UE, and the UE's subscription Information, UE authentication, authorization parameters and other information.
  • the user identifier may be the IMSI or WTMSI of the user.
  • the present invention configures parameters such as the IP address of the UE and the user identifier in the PDG in advance, and establishes a mapping relationship between the IP address of the UE and the user identifier.
  • the data sent from the external network arrives at the PDG and triggers a routing query.
  • the PDG finds the user ID of the user based on the IP address of the target user in the data, and then sends a query request containing the user ID to the routing storage device to query the target UE's ownership.
  • the route registration device may be a home subscription user service device.
  • the home subscription user service device has stored the user identifier of the UE, the address of the AS to which the UE belongs, and the mapping relationship between the user identifier of the UE and the address of the own AS. Convenience.
  • the route registration device may also use an AS adjacent to the PDG. Since the user identity of the UE already exists in the AS, it is necessary to add the address of the AS to which the UE belongs in the AS serving as the route registration device.
  • Solution 1 The PDG directly queries the HLR / HSS for routing: first, the PDG and the HLR, or A direct interface is established between the PDG and the HSS.
  • the PDG directly sends a routing query message to the HLR / HSS, and the HLR / HSS returns the routing information of the AS to which the UE belongs.
  • the process of implementing route query using HSS includes:
  • Step 401 The PDG sends a request message to the HSS to query the AS routing information of the UE through the Wc interface.
  • the request message includes the HSS address, the PDG address, and the UE's user identifier.
  • Step 402 After receiving the request message, the HSS searches for the routing information of the AS to which the requested UE belongs according to the user identifier of the request message, and returns a response message to the requested PDG. If the HSS finds the requested routing information, The response message includes the user identifier of the UE and the address of the AS to which the UE belongs; if the HSS cannot find the requested routing information, the response message returned contains the corresponding error cause.
  • HLR For the case of using HLR to implement route query, since the traditional HLR does not involve AS-related services, there is no AS routing entry in the HLR routing table. Existing parameters and signaling of General Packet Radio Service (GPRS) are not involved. AS part. In order to make the best use of existing resources, this solution uses Gc.
  • the interface connects PDG and HLR. This interface still uses the existing parameters and signaling of GPRS.
  • the routing information of AS will be saved in the form of MSC / SGSN routing in HLR That is, save the AS's route as the route of a certain MSC or SGSN in The routing position of the MSC or SGSN, so that the PDG queries the routing information of the AS to which the UE belongs through this interface.
  • the AS routing query request message sent by the PDG may use the existing MAP_SEND_ROUTING_IP_FOR_ GPRS request message to be sent to the HLR through the Gc interface to query the AS routing information to which the UE belongs.
  • the UE is represented by a user identifier IMSI or WTMIS.
  • the HLR receives the message, and after the search is completed in itself, the existing MAP_SEND_ROUTING_INFO JFOR_GPRS response message is used as a response message to return the query result to the PDG. If the search is successful, it is included in the message. Contains the user identity of the UE and the address of the AS to which the UE belongs. Among them, the information element (IE) "GSN Address" of the MAP_SEND_ ROUTING_ INFO_ FOR_ GPRS response message is used to place the address identifying the AS to which the UE belongs. If the HLR cannot query the routing information of the AS to which the UE belongs, the response message contains the corresponding error cause.
  • IE information element
  • the PDG queries the HLR / HSS for routing through the AS forwarding request: Unlike the first scheme, the PDG sends the route query message to the AS connected to it, and then the AS forwards the route query message to the HLR7HSS. After the route search is completed, , HLR7HSS returns a route query response message to the PDG via the AS.
  • FIG. 5a is a network using HSS 106a as a home subscriber service device, and PDG 105 and HSS 106a are indirectly connected through AS 103.
  • FIG. 5b is a network using HLR 106 b as a home subscriber service device, PDG 105 It is indirectly connected to HLR 106b through AS 103.
  • the situation of using HSS to query the route includes:
  • Step 601 The PDG sends a PDG query message to the AS through the Wm interface to query the routing information of the AS to which the target UE belongs.
  • the destination address of the request message is the HSS address
  • the source address is the PDG address
  • the UE identifier is included.
  • Step 602 The request message is first sent to the AS via the Wm interface. After receiving the request message, the AS performs protocol conversion on the message and forwards the message to the HSS through the Wx interface.
  • Step 603 After receiving the request message, the HSS searches for AS routing information of the requested UE in itself and returns a response message to the PDG.
  • the source address of the response message is the HSS address and the destination address is the PDG. If the HSS finds the requested routing information, the response message contains the user ID of the UE and the address of the AS to which the UE belongs; if the HSS does not find the requested routing information, the response message returned contains the corresponding error cause.
  • This step The same as described in step 402.
  • Step 604 the response message is sent to the AS via the Wx interface, and the AS performs protocol conversion on the received response message and returns it to PDGo.
  • the method of saving AS routes in HLR and HLR using query response signaling is the same as scheme one, that is, when AS passes D, interface or Gr, the interface forwards PDG to HLR to query the route of AS to which the UE belongs.
  • For information messages use MAP_SEND_ ROUTING_ INFO_ FOR_ GPRS request message as the routing information message for the PDG to query the AS of the UE, and use MAP_SEND_ ROUTING_ INFO_ FOR_ the GPRS response message as the PDG to query the routing information for the AS of the UE.
  • Response message Use the IE "GSN Address" of the MAP-SEND- ROUTING- INFO- FOR- GPRS response message to place the address identifying the AS to which the UE belongs.
  • the other processes are the same as in the case of HSS.
  • Solution 3 The PDG queries the AS for the route, and the AS queries the HLR / HSS for the route: The PDG directly queries the AS for the routing information of the AS to which the UE belongs through the Wm interface, and the AS then The HLR / HSS queries the routing information of the AS to which the UE belongs, and then the AS returns the routing information returned from the HLR / HSS to the PDG.
  • Step 701 The PDG queries the AS for the routing information of the AS to which the UE belongs.
  • the PDG sends a PDG query routing information message to the AS through the Wm interface to the AS to which the target UE belongs.
  • the destination address in the message is the AS address, the source address is the PDG address, and the user identifier of the UE is included.
  • Step 702 After receiving the request message, the AS first searches the AS route to which the target UE belongs in itself. If the AS finds the routing information of the AS to which the requested target UE belongs, it returns a corresponding message containing the routing information to the PDG. Find the AS route to which the target UE of the request belongs, and then perform protocol conversion on the message, and forward the request message to the HSS through the Wx interface according to the HSS address stored in the AS. In the forwarded message, the destination address is changed to an HSS address, and the source address is an AS address.
  • Step 703 After receiving the request message, the HSS searches for the requested routing information and returns a response message to the AS.
  • the destination address of the response information is the AS address and the source address is the HSS address. If the HSS finds the requested routing information, the response message contains the user ID of the UE and the address of the AS to which the UE belongs. If the routing query fails, the response message contains the corresponding error cause.
  • step 704 the AS receives the response message, performs protocol conversion on the response message, and returns it to the PDG.
  • the destination address of the response message is changed to the PDG address, and the source address is the AS address.
  • the AS can also save the AS address of the target UE in the response message.
  • the PDG next queries the AS for the AS address of the target UE, the AS can directly return the AS address to the PDG without Need to check with HSS again.
  • the interface adopts MAP_SEND_ROUTING_INFO — FOR—
  • the GPRS request message is used as the routing information message for the PDG query ⁇ owning AS
  • the MAP_SEND — ROUTING — INFO — FOR — GPRS response message is used as the PDG query routing information response message for the AS to which the UE belongs.
  • the other processes are the same as in the case of HSS.
  • the PDG queries the AS for routing:
  • the PDG directly sends routing query information to the AS through the Wm interface, and the AS directly returns the routing information to the PDG.
  • the AS adjacent to the PDG should also store at least the AS addresses of all authorized interworking network users. See Figure 8 for its network structure.
  • PDG 105 is directly connected to AS 103, which is a route registration device. Since this solution does not involve the HLR / HSS part, it can be connected or not connected with the HLR / HSS. Any structure shown in Figures 3 and 5 can be used.
  • Step 901 The PDG queries the AS for routing information of the AS to which the UE belongs.
  • the PDG sends a PDG query to the AS for the routing information message of the AS to which the UE belongs.
  • the destination address of the message is the AS address
  • the source address is the PDG address
  • the UE identifier is included.
  • Step 902 After receiving the message, the AS searches for the AS routing information of the requested target UE according to the user identifier of the request message, and then returns a response message to the PDG. If the AS finds the AS routing information of the requested target user, it responds The message contains the user identifier of the UE and the address of the AS to which the UE belongs. If the query routing process fails, the response message contains the corresponding error cause.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un procédé de demande d'informations d'acheminement dans un environnement WLAN interagissant avec un réseau mobile. Ce procédé comporte les étapes consistant à : stocker l'adresse IP d'un dispositif d'utilisateur et l'ID d'utilisateur dans une passerelle de réseau de données en paquets, et mettre en oeuvre le mappage de l'adresse IP et de l'ID d'utilisateur ; selon l'adresse IP contenue dans les données reçues, la passerelle de réseau de données en paquets effectue une recherche de l'ID d'utilisateur correspondant à cette adresse et envoie la demande d'informations d'acheminement contenant l'ID d'utilisateur à un dispositif d'enregistrement d'acheminement ; en fonction du mappage de l'ID d'utilisateur du dispositif connecté et des informations d'acheminement du serveur d'authentification attributif, le dispositif d'enregistrement d'acheminement effectue une recherche dans les informations d'acheminement du serveur d'authentification attributif du dispositif d'utilisateur cible et renvoie les résultats. L'invention permet d'effectuer des demandes d'informations d'acheminement de serveur d'authentification attributif d'UE dans un réseau d'interactions WLAN-3GPP.
PCT/CN2004/000646 2003-06-17 2004-06-17 Procede de demande d'informations d'acheminement dans un environnement wlan interagissant avec un reseau mobile Ceased WO2004112319A1 (fr)

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CN03142524.0 2003-06-17
CNB031425240A CN1315302C (zh) 2003-06-17 2003-06-17 无线局域网和移动网互通情况下查询路由的方法

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US20020085516A1 (en) * 2000-12-28 2002-07-04 Symbol Technologies, Inc. Automatic and seamless vertical roaming between wireless local area network (WLAN) and wireless wide area network (WWAN) while maintaining an active voice or streaming data connection: systems, methods and program products
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