WO2012088849A1 - Procédé et système pour obtenir des données de connexion - Google Patents

Procédé et système pour obtenir des données de connexion Download PDF

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Publication number
WO2012088849A1
WO2012088849A1 PCT/CN2011/076251 CN2011076251W WO2012088849A1 WO 2012088849 A1 WO2012088849 A1 WO 2012088849A1 CN 2011076251 W CN2011076251 W CN 2011076251W WO 2012088849 A1 WO2012088849 A1 WO 2012088849A1
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WO
WIPO (PCT)
Prior art keywords
connection information
peer
server
identifier
location
Prior art date
Application number
PCT/CN2011/076251
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English (en)
Chinese (zh)
Inventor
周娜
王志海
霍玉臻
Original Assignee
中兴通讯股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN201010607711.7A external-priority patent/CN102572681B/zh
Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Publication of WO2012088849A1 publication Critical patent/WO2012088849A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/12—Discovery or management of network topologies
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/50—Network services
    • H04L67/52—Network services specially adapted for the location of the user terminal

Definitions

  • the present invention relates to the field of mobile communications, and in particular to a connection information acquisition method, a system, a connection information server, and a location server.
  • IP address in the Transmission Control Protocol/Internet Protocol which is widely used in the Internet, has a dual function, and serves as the location identifier of the communication terminal host network interface of the network layer in the network topology. And as the identity of the transport layer host network interface.
  • IP address of the host changes, not only the route changes, but also the identity of the communication terminal host changes. This will cause the routing load to become heavier and heavy, and the change of the host identity will also cause the application and connection to be interrupted.
  • FIG. 1 shows an architecture of an identity identification and location separation network.
  • the network topology of the architecture is divided into an access network and a backbone network without overlapping relationships in the topology relationship.
  • the access network is located at the edge of the backbone network and is responsible for all terminals.
  • the access, the backbone network is responsible for the routing and forwarding of data packets between the terminals.
  • the terminal identifier is used to indicate the user identity of the terminal, which is always unchanged during the terminal movement; the terminal location is used to indicate the location identifier assigned by the network to the terminal, and is used in the backbone network.
  • the identity and location identifiers may have different names in different communication architectures and should be considered equivalent.
  • the terminal may be one or more of a mobile terminal, a fixed terminal, and a nomadic terminal, such as a mobile phone, a landline phone, a computer, a server, and the like.
  • the access network is used to provide a layer 2 (physical layer and link layer) access means for the terminal, and maintains a physical access link between the terminal and the access gateway.
  • the main network elements of the backbone network include: an access gateway, which is used to allocate location information to the terminal.
  • the access gateway accesses the backbone network.
  • the location information assigned by the access gateway points to the access gateway, that is, the address information of the access gateway, and the location information is used as the destination address of the data packet, and the data packet is routed to the access gateway.
  • a common router (CR) is configured to perform routing based on location information in the data packet, and forward the data packet with the location information as the destination address.
  • the location server is configured to process registration, logout, and query of terminal location information, and save and maintain identity information and location information mapping information of the home user terminal.
  • the backbone network may further include: a packet forwarding function (PTF), which is also referred to as a packet forwarding function node, configured to perform communication according to the data packet after receiving the data packet sent by the home user terminal.
  • PTF packet forwarding function
  • the peer identifier finds the location information of the communication peer end and encapsulates it in the packet header and forwards it to the generalized forwarding plane.
  • An Interconnect Service Node (ISN) has an interface with a general-purpose router, an access gateway, and a location server for interconnecting two networks.
  • the above location server, or location server and PTF constitute a mapping forwarding plane of the backbone network.
  • CR, or CR and ISN form the generalized forwarding plane of the backbone network.
  • the network based on the identity location separation architecture, because the identity and location of the terminal are separated, the terminal and the communication peer identify the other party through the terminal identifier, and use the location information to implement routing and forwarding of data packets.
  • the identity of the terminal does not change, so as to maintain the communication relationship between the terminal and the communication peer.
  • the location information can be redistributed as the terminal moves, thereby supporting the terminal to perform mobility without a fixed anchor point, and solving the packet path bypass.
  • the access gateway receives the uplink data packet to encapsulate and forward the location information.
  • the location information of the communication peer is locally queried, for example, the location information of the communication peer is used as the destination address, and the terminal location information is used as the source address in the data packet including the terminal identifier and the communication peer identifier.
  • the generalized forwarding plane forwards to the access gateway accessed by the communication peer. If the query is not available, the location information of the communication peer is queried to the home location server of the communication peer and stored locally. In this case, the location information of the terminal may be encapsulated in the packet, and then forwarded to the generalized forwarding plane through the mapping forwarding plane, or after the location information of the communication peer end is queried, the access gateway may query the local query as described above.
  • the access gateway When the location information of the opposite end is communicated Row location information encapsulation and forwarding processing.
  • the access gateway encapsulates the solution location information, strips the location information, and sends the location information to the terminal. It can be seen that, in order to implement normal forwarding of packets, the access gateway needs to allocate location information to the terminal when the terminal accesses, and register the location information to the location server to update the location information of the terminal in the location server. The access gateway also needs to maintain the identity and location information mapping information of the terminal and its communication peer to implement the encapsulation of the location information of the packet.
  • the access gateway maintains the communication relationship between the terminal and the communication peer for each terminal, which is referred to as the peer information of the terminal, and the peer information includes the correspondence relationship between the terminal identifier and the communication peer identifier.
  • the identification and location information mapping information of the terminal may also be included.
  • the access gateway uniformly maintains the identity and location information mapping information of the communication peers of all terminals.
  • the access gateway it is also possible for the access gateway to separately maintain the identity and location information mapping information of all communication peers of the terminal, including the peer information of the terminal.
  • the peer information is maintained. When the terminal switches, the access gateway on the side of the terminal can determine which communication peers the terminal has, so that the terminal can access the new location information of the terminal to the access gateway accessed by the communication peer.
  • the access gateway accessing the communication peer After the access gateway accessing the communication peer is updated, the data packet sent by the communication peer can be directly routed to the access gateway to which the terminal switches. In the case of multiple connections, the terminal location information needs to be queried according to the connection information. At this time, when the communication peer sends data to the terminal, the communication peer access gateway needs to obtain the connection information corresponding to the peer network (such as the network). Name), the prior art can use the way that the terminal informs when the connection is established, or can be obtained by the static configuration method of the access gateway. These methods have special requirements for the terminal, or increase the system management burden, and cannot be flexible. Effectively realize the acquisition function of connection information.
  • connection information acquisition method comprising: the connection information server transmitting the connection information to the peer access gateway, and the peer access gateway connecting The information is transmitted to the location server, or the connection information server transmits the connection information directly to the location server.
  • the method further includes: the location server returning location information of the terminal to the peer access gateway according to the connection information.
  • the method further includes: the peer access gateway sending an inquiry request message to the connection information server, carrying the identifier of the peer, The connection information server acquires the connection information according to the identifier of the peer.
  • the method further includes: the data sent by the peer end to the terminal reaches the connection information server via the peer access gateway;
  • the connection information server obtains the connection information according to the identifier of the peer end; or the peer access gateway sends an inquiry request message to the connection information server, and carries the identifier of the peer end, where the connection information server is configured according to the The peer end identifier obtains the connection information; or the peer access gateway sends a query location information request to the location server, and carries the identifier of the peer end; the location server sends a query connection to the connection information server.
  • the information request carries the identifier of the peer; and the connection information server acquires the connection information according to the identifier of the peer.
  • the method further includes: the location server buffering a correspondence between the peer identifier and the connection information.
  • the connection information includes one or a combination of the following: a network name, a public land mobile communication network identifier, a quality of service parameter, and charging information.
  • the present invention further provides a connection information obtaining system, where the system includes a connection information server and a location server, or includes a connection information server, a peer access gateway, and a location server, where: the connection information The server is configured to: transmit the connection information to the peer access gateway; or transmit the connection information directly to the location server; the peer access gateway is configured to: transmit the connection information to the location server.
  • the location server is further configured to: return location information of the terminal to the peer access gateway according to the connection information.
  • the peer access gateway is further configured to: send a query request message to the connection information server, and carry the identifier of the peer end; the connection information server is further configured to: obtain the location according to the identifier of the peer end The connection information.
  • the peer access gateway is further configured to: transmit data sent by the peer to the terminal to the connection information server; and the connection information server is further configured to: acquire the location according to the identifier of the peer.
  • the connection information is further configured to: send a query request message to the connection information server, and carry the identifier of the peer end; the connection information server is further configured to: according to the identifier of the peer end Obtaining the connection information; or
  • the peer access gateway is further configured to: send a query location information request to the location server, and carry the identifier of the peer end; the location server is further configured to: send the query connection information to the connection information server, The connection information server is further configured to: obtain the connection information according to the identifier of the peer end.
  • the location server is further configured to: cache a correspondence between the peer identifier and the connection information.
  • the connection information includes one or a combination of the following: a network name, a public land mobile communication network identifier, a quality of service parameter, and charging information.
  • the present invention further provides a connection information server, which is configured to: transmit connection information to a peer access gateway, so that the peer access gateway transmits the connection information to a location server; Alternatively, the connection information is transmitted directly to the location server.
  • the connection information server is further configured to: receive a query request message that is sent by the peer access gateway to the connection information server and that carries the identifier of the peer end; and obtain the connection information according to the identifier of the peer end.
  • the connection information server is further configured to: receive data sent by the peer to the terminal sent by the peer access gateway to the terminal; and obtain the connection information according to the identifier of the peer; or receive the peer access a query request message that is sent by the gateway to the connection information server and carries the identifier of the peer end; and obtains the connection information according to the identifier of the peer end; or, the receiving location server receives the peer access gateway to the location server After the sent request carries the identifier of the peer to query the location information request, the location server sends a query connection information request that is sent by the connection information server to carry the identifier of the peer end; and acquires the connection information according to the identifier of the peer end.
  • connection information server the connection information includes one or a combination of the following: a network name, a public land mobile communication network identifier, a quality of service parameter, and charging information.
  • the present invention further provides a location server, which is configured to: receive connection information sent by the connection information server to the location server through the peer access gateway; or receive the connection information server directly to the location Connection information sent by the server.
  • the location server is further configured to: return location information of the terminal to the peer access gateway according to the connection information.
  • the location server is further configured to: receive a query location information request sent by the peer access gateway to the location server, where the query location information request carries the identifier of the peer end; and send the query connection information to the connection information server The request, the query connection information request carries the identifier of the peer, so that the connection information server obtains the connection information according to the identifier of the peer.
  • the location server is further configured to: cache a correspondence between the peer identifier and the connection information.
  • the connection information includes one or a combination of the following: a network name, a public land mobile communication network identifier, a quality of service parameter, and charging information.
  • the invention combines an identity location separation network to propose a connection information acquisition method, a system, a connection information server and a location server, so that the peer can obtain the correct location information when transmitting data to the terminal, and the terminal or the peer access gateway does not.
  • the connection information corresponding to the peer network needs to be maintained in advance, which effectively reduces the management burden of the current method on the system and improves the system processing efficiency.
  • FIG. 1 is a schematic diagram of a wireless communication network connection in the prior art
  • FIG. 2 is a flow chart of a process of querying terminal location information when a peer transmits data to a terminal in the prior art
  • FIG. 4 is a flowchart of a process for querying terminal location information when a peer end transmits data to a terminal
  • FIG. 5 is a flowchart of a process for querying terminal location information when a peer end transmits data to a terminal
  • Figure 6 is a flow chart 4 of the process of querying the terminal location information when the peer end transmits data to the terminal.
  • connection information acquisition method comprising: a connection information server transmitting connection information to a peer access gateway, and a peer access gateway transmitting connection information to a location server; or, the connection information server connecting information Directly transmitted to the location server; and the location server returns the location information of the terminal to the peer access gateway according to the connection information.
  • the method further includes: after receiving the connection information, the location server buffers the correspondence between the peer identifier and the connection information; wherein, the connection information may refer to the connection information of the terminal network or the peer network, and if it is the information of the terminal network, There is a correspondence between the peer networks.
  • the connection information includes one or a combination of the following information: a network name, a Public Land Mobile Network Identifier (PLMN ID), a Quality of Service (QoS) parameter, and charging information.
  • the network name is an Access Point Name (APN), a domain name/identity, and a Packet Data Network name/identity.
  • the QoS parameter may be a QoS Class Identifier (QCI).
  • the billing information may be a rate, and a tariff level.
  • the peer identifier may be an Access Identifier (AID), an International Mobile Subscriber Identity (IMSI), an Identifier, a Network Access Identifier (NAI), and an IP address.
  • AID Access Identifier
  • IMSI International Mobile Subscriber Identity
  • NAI Network Access Identifier
  • IP address IP address
  • the location information of the terminal may be an access gateway address/identity currently serving the terminal, or an IP address allocated by the access gateway for the terminal.
  • the method includes: the peer access gateway sends a query request message to the connection information server, and carries the identifier of the peer end, where the connection information server transmits the connection information to the peer access gateway. Obtaining the connection information according to the identifier of the peer end.
  • the method further includes: the data sent by the peer end to the terminal reaches the connection information server via the peer access gateway; the connection The information server obtains the connection information according to the identifier of the peer end; or the peer access gateway sends an inquiry request message to the connection information server, and carries the identifier of the peer end, where the connection information server is according to the pair The identifier of the end acquires the connection information; Or the peer access gateway sends a query location information request to the location server, and carries the identifier of the peer end; the location server sends a query connection information request to the connection information server, and carries the identifier of the peer end; And the connection information server acquires the connection information according to the identifier of the peer end.
  • FIG. 3 is a flowchart of a process of querying terminal location information when a peer end transmits data to a terminal based on the scenario of the system architecture of FIG. 1.
  • the peer access gateway requests and obtains connection information from the connection information server.
  • the specific steps are as follows: Step 301: The data sent by the peer end to the terminal reaches the peer access gateway. Step 302: Optionally, if the terminal does not cache the location identifier information, the peer access gateway may Step 303: The peer access gateway sends a connection information query message to the connection information server, and carries the peer identifier.
  • Step 304 The connection information server obtains the connection information according to the peer identifier, and replies to the peer access gateway.
  • the information query response carries the connection information.
  • Step 306 The peer access gateway requests the location server to query the location information of the terminal, and carries the terminal identifier and the connection information.
  • the terminal access gateway sends the data to the terminal.
  • the peer access gateway may cache the peer identifier, the terminal identifier, and the terminal location information, and optionally save the connection information, so that the subsequent packet sent by the peer end to the terminal is routed to the access gateway of the terminal without performing execution. The operation of querying the location server.
  • FIG. 4 is a flow chart of a process for querying terminal location information when a peer end transmits data to a terminal based on the scenario of the system architecture of FIG. 1.
  • the peer access gateway sends data to the connection information server, and the connection information server performs connection information acquisition and data forwarding.
  • Step 401 The data sent by the peer end to the terminal arrives at the connection information server by the peer access gateway; Step 402, the connection information server obtains the connection information according to the peer identifier; Step 403, the connection information server requests the location server Querying the terminal location information, carrying the terminal identifier and the connection information; Step 404, the location server returns to query the terminal location information response, and carries the location information; Step 405: The connection information server sends the data to the access gateway corresponding to the acquired location information ( Terminal access gateway), the terminal access gateway sends the data to the terminal.
  • connection information server may cache the peer identifier, the terminal identifier, and the terminal location information, and optionally save the connection information, so as to route the subsequent packet sent by the peer end to the terminal to the access gateway of the terminal without performing the location location.
  • the server performs the query operation.
  • FIG. 5 is a flowchart of a process for querying terminal location information when a peer end transmits data to a terminal according to the scenario of the system architecture of FIG. 1.
  • the location information is requested by the peer access gateway to the connection information server, and the connection information server performs the connection information acquisition operation. The specific steps are described below:
  • Step 501 The data sent by the peer end to the terminal reaches the peer access gateway.
  • Step 502 Optionally, if the terminal identifier location mapping information is not cached, the peer access gateway may cache the data.
  • Step 504 The location server returns a query terminal location information response to the peer access gateway via the connection server, and carries the location information.
  • the access gateway sends (terminal access gateway), and the terminal access gateway sends the data to the terminal.
  • the peer access gateway may cache the peer identifier, the terminal identifier, and the terminal location information, so as to route the subsequent packet sent by the peer end to the terminal to the access gateway of the terminal without performing an operation of querying the location server. .
  • Step 601 The data sent by the peer end to the terminal reaches the peer access gateway.
  • Step 602 Optionally, if the terminal does not cache the location identifier information, the peer access gateway may Step 603: The peer access gateway sends a query request message to the location server, and carries the local end (ie, the peer end identifier) and the terminal identifier.
  • Step 604 The location server sends a connection information query message to the connection information server, and carries the local end
  • the connection information server replies with the connection information query response to the location server, and carries the connection information.
  • Step 606 optionally, the location server caches the correspondence between the peer identifier and the connection information, so as to The subsequent query request message sent by the access gateway can obtain the connection information locally without performing the operation of querying the connection information server, thereby effectively improving the execution efficiency; the location server returns an information query response to the peer access gateway, and carries the location information;
  • the peer access gateway may cache the peer identifier, the terminal identifier, and the terminal location information, so as to route the subsequent packet sent by the peer end to the terminal to the access gateway of the terminal without performing an operation of querying the location server.
  • the terminal access gateway After the terminal moves, the terminal access gateway is required to perform a location update process for the terminal. During the handover process, the terminal access gateway carries the terminal identifier, the new location, the connection information, or the terminal location information when transmitting the new location information of the terminal to the peer access gateway. Peer identification.
  • connection information is obtained by taking the access gateway to query the connection information server for the connection information or the location information and the location server for the location information.
  • the peer access gateway function may also be moved to the peer end, and the peer end queries the connection information server for the connection information or the location information, and queries the location server for the location information.
  • connection information may be one or more of the following: a network name, a PLMN ID, a QoS parameter, and charging information.
  • the connection information may refer to the information of the terminal network or the peer network. If it is the information of the terminal network, it has a corresponding relationship with the peer network.
  • the network name can be one or more of APN, Domain Name/Identity, PDN Name/Identity.
  • the QoS parameter can be QCI.
  • the billing information can be a rate and/or a tariff level.
  • the terminal identifier may be one or more of an AID, an IMSL ID, an NAI, and an IP address.
  • the location information may be an access gateway address/identity, or an IP address assigned by the access gateway.
  • the present invention also provides a connection information acquisition system, where the system includes a connection information server and a location server, or includes a connection information server, a peer access gateway, and a location server, where:
  • the connection information server is configured to: transmit the connection information to the peer access gateway; or transmit the connection information directly to the location server; the peer access gateway is configured to: transmit the connection information to the location server.
  • the location server is further configured to: return location information of the terminal to the peer access gateway according to the connection information.
  • the peer access gateway is further configured to: send a query request message to the connection information server, and carry the identifier of the peer end; the connection information server is configured to: obtain the connection according to the identifier of the peer end information.
  • the peer access gateway is further configured to: transmit the data sent by the peer to the terminal to the connection information server; the connection information server is configured to: obtain the connection according to the identifier of the peer And the peer access gateway is further configured to: send a query request message to the connection information server, and carry the identifier of the peer end; the connection information server is configured to: obtain the location according to the identifier of the peer end.
  • the connection information is further configured to: send the query location information request to the location server, and carry the identifier of the peer end; the location server is further configured to: send the connection information server Querying the connection information request, carrying the identifier of the peer end; the connection information server is configured to acquire the connection information according to the identifier of the peer end.
  • the location server is further configured to: cache a correspondence between the peer identifier and the connection information.
  • the connection information includes one or a combination of the following: a network name, a public land mobile communication network identifier, a quality of service parameter, and charging information.
  • the embodiment further provides a connection information server, which is configured to: transmit the connection information to the peer access gateway, so that the peer access gateway transmits the connection information to the location server; or, the connection is The information is directly transmitted to the location server; the connection information server is further configured to: receive a query request message that is sent by the peer access gateway to the connection information server and that carries the identifier of the peer end; and obtain the identifier according to the identifier of the peer end The connection information.
  • a connection information server which is configured to: transmit the connection information to the peer access gateway, so that the peer access gateway transmits the connection information to the location server; or, the connection is The information is directly transmitted to the location server; the connection information server is further configured to: receive a query request message that is sent by the peer access gateway to the connection information server and that carries the identifier of the peer end; and obtain the identifier according to the identifier of the peer end The connection information.
  • the connection information server is further configured to: receive data sent by the peer end gateway to the connection information server to the terminal, and obtain the connection information according to the identifier of the peer end; or And the query request message sent by the gateway to the connection information server that carries the identifier of the peer end; and acquiring the connection information according to the identifier of the peer end; or, the receiving location server receives the peer access gateway to the location After the server sends a request for querying the location information of the peer, the location server sends a query connection information request to the connection information server that carries the identifier of the peer; and obtains the connection information according to the identifier of the peer.
  • connection information includes one or a combination of the following: a network name, a public land mobile communication network Identification, quality of service parameters, and billing information.
  • the embodiment further provides a location server, which is configured to: receive connection information sent by the connection information server to the location server through the peer access gateway; or receive a connection directly sent by the connection information server to the location server information.
  • the location server is further configured to: return location information of the terminal to the peer access gateway according to the connection information.
  • the location server is further configured to: receive a query location information request sent by the peer access gateway to the location server, where the query location information request carries the identifier of the peer end; and send the query connection information to the connection information server The request, the query connection information request carries the identifier of the peer, so that the connection information server obtains the connection information according to the identifier of the peer.
  • the location server is further configured to: cache a correspondence between the peer identifier and the connection information.
  • the connection information includes one or a combination of the following: a network name, a public land mobile communication network identifier, a quality of service parameter, and charging information.
  • modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device, such that they may be stored in the storage device by the computing device, or they may be separately fabricated into individual integrated circuit modules, or they may be Multiple modules or steps are made into a single integrated circuit module.
  • the invention is not limited to any specific combination of hardware and software.
  • the above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.
  • the present invention in conjunction with the identity location separation network, proposes a method for obtaining connection information, so that the peer can obtain the correct location information when transmitting data to the terminal, and the terminal or the peer access gateway does not need to maintain the peer network correspondingly.
  • the connection information effectively reduces the management burden of the current method on the system and improves the system processing efficiency.

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  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention se rapporte à un procédé adapté pour obtenir des données de connexion. Le procédé selon l'invention comprend les étapes suivantes : un serveur de données de connexion envoie des données de connexion à une passerelle d'accès d'une extrémité opposée, et la passerelle d'accès de l'extrémité opposée envoie les données de connexion à un serveur de données de position; ou bien le serveur de données de connexion envoie les données de connexion directement au serveur de données de position. La présente invention se rapporte d'autre part à un système adapté pour obtenir des données de connexion, et se rapporte également à un serveur de données de connexion ainsi qu'à un serveur de données de position. Selon la présente invention, l'extrémité opposée peut obtenir des données de position correctes quand des données sont envoyées au terminal, et la passerelle d'accès du terminal ou de l'extrémité opposée n'a pas besoin de conserver à l'avance les données de connexion correspondant à un réseau opposé. Le procédé selon la présente invention permet de réduire efficacement la charge de gestion du système et d'améliorer l'efficacité de traitement du système.
PCT/CN2011/076251 2010-12-27 2011-06-24 Procédé et système pour obtenir des données de connexion WO2012088849A1 (fr)

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CN201010607711.7A CN102572681B (zh) 2010-12-27 一种连接信息获取方法和系统

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