WO2014161319A1 - Procédé et système de réseau d'accès pour mettre en œuvre une séparation entre une commande et un porteur - Google Patents

Procédé et système de réseau d'accès pour mettre en œuvre une séparation entre une commande et un porteur Download PDF

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Publication number
WO2014161319A1
WO2014161319A1 PCT/CN2013/087604 CN2013087604W WO2014161319A1 WO 2014161319 A1 WO2014161319 A1 WO 2014161319A1 CN 2013087604 W CN2013087604 W CN 2013087604W WO 2014161319 A1 WO2014161319 A1 WO 2014161319A1
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WIPO (PCT)
Prior art keywords
pbg
pdsn
user terminal
route
bearer
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PCT/CN2013/087604
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English (en)
Chinese (zh)
Inventor
王飞
Original Assignee
中兴通讯股份有限公司
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Publication of WO2014161319A1 publication Critical patent/WO2014161319A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/12—Setup of transport tunnels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/16—Gateway arrangements

Definitions

  • the present invention relates to communication technologies, and in particular, to a method for implementing control and bearer separation and an access network system. Background technique
  • China Telecom's wireless broadband service integration called Code Division Multiple Access (CDMA) + 3G, the 3rd Generation network + WLAN (Wireless Local Area Networks)
  • CDMA Code Division Multiple Access
  • 3G the 3rd Generation network + WLAN (Wireless Local Area Networks)
  • CDMA Code Division Multiple Access
  • WLAN Wireless Local Area Networks
  • C+W The abbreviation "C+W” network is a key product for China Telecom to transform from a fixed-line operator to a full-service operator. Users of China Telecom's C+W service can choose which network to use under the coverage of telecom signals.
  • FIG. 1 is a schematic diagram of the existing C+W network architecture.
  • WAG wireless access gateway
  • the WAG server forwards data from a packet service data node (PDSN, Package Data Service Node) on the network side.
  • PDSN packet service data node
  • the WAG server handles both control plane data and bearer plane data.
  • WAG servers are rare resources, and each province's WAG servers have only one or two; and, when there are two WAG servers, they are divided into primary servers and standby servers, which actually work. Only the primary WAG server works, and the standby WAG server works only when the primary WAG server crashes.
  • the main purpose of the embodiments of the present invention is to provide a method for implementing control and bearer separation and an access network system, which can reduce the load of the WAG server and improve the stability of the C+W service.
  • An embodiment of the present invention provides a method for implementing control and bearer separation, where the method is applied to an access network system, where the access network system includes a wireless access gateway WAG server, a packet service data node PDSN, and one or more point-to-point protocols.
  • the data bearer gateway PBG; the method further includes:
  • the WAG server When receiving the service request sent by the user terminal, the WAG server selects, for the user terminal, a PBG that carries bearer plane data of the service;
  • Transmitting plane data of the service related to the user terminal is transmitted through a route between the PBG and the PDSN.
  • the method further includes:
  • the WAG server notifies the user terminal of the information of the PBG
  • the method further includes:
  • the WAG server When receiving the service termination request sent by the user terminal, the WAG server notifies the PBG to release the route between the PBG and the PDSN.
  • the method further includes:
  • the route between the user terminal and the PBG is released.
  • the notifying the PBG to establish a route between the PBG and the PDSN includes:
  • the PBG establishes a PBG to PDSN route according to the Internet Protocol IP address information and port information allocated by the PDSN carried in the request for the enhanced bearer channel to the user terminal, and
  • the WAG server returns the bearer channel identity code assigned to the user terminal by the PBG.
  • the notifying the PBG to release the route between the PBG and the PDSN includes:
  • the PBG deletes the route from the PBG to the PDSN according to the bearer channel ID carried in the request for deleting the bearer channel, and returns a response of deleting the bearer channel to the WAG server.
  • the embodiment of the present invention further provides an access network system that implements control and bearer separation, and the access network system includes: a wireless access gateway WAG server, a packet service data node PDSN, and one or more point-to-point protocol data bearer gateways PBG; among them,
  • the WAG server is configured to: when receiving the service request sent by the user terminal, select a PBG that carries the bearer plane data of the service for the user terminal; and notify the PBG to establish a route between the PBG and the PDSN. ;
  • the PBG is configured to establish a route between the PBG and the PDSN, and transmit, by using the route between the PBG and the PDSN, bearer plane data of the service related to the user terminal.
  • the WAG server is further configured to notify the user terminal of the information of the PBG, so that the user terminal establishes a route between the user terminal and the PBG.
  • the WAG server is further configured to notify the PBG to release a route between the PBG and the PDSN when receiving a service termination request sent by the user terminal.
  • the WAG server is further configured to send an increase bearer channel request to the PDSN;
  • the PBG is further configured to: establish a PBG-to-PDSN route according to the Internet Protocol IP address information and port information allocated by the PDSN carried in the request to the user terminal, and return the PBG to the WAG server. Adding a bearer channel ID of the bearer channel identity code assigned by the user terminal;
  • the WAG server is further configured to send a delete bearer channel request to the PDSN;
  • the PBG is further configured to delete a route of the PBG to the PDSN according to the bearer channel ID carried in the request for deleting the bearer channel, and return a response of deleting the bearer channel to the WAG server.
  • the WAG server separates the control plane data from the bearer plane data, and the Point to Point Protocol Bearing Gateway (PBG) is based on the WAG month.
  • PBG Point to Point Protocol Bearing Gateway
  • the increased bearer channel sent by the server requests to establish a PBG-to-PDSN route.
  • the user terminal After the user-to-PBG route and the PBG-to-PDSN route are established, the user terminal performs bearer data transmission through the PBG and the PDSN. In this way, by adding PBG to process the bearer plane data, the load of the WAG server is reduced, and the capacity and performance of the WAG server are effectively improved.
  • Figure 1 is a schematic diagram of an existing C+W network architecture
  • FIG. 2 is a schematic diagram of an implementation process of a method for implementing control and bearer separation according to an embodiment of the present invention
  • FIG. 3 is a schematic structural diagram of a structure of an access network system for implementing control and bearer separation according to an embodiment of the present invention
  • 4 is a schematic structural diagram of an access network system for implementing control and bearer separation according to an embodiment of the present invention
  • FIG. 5 is a schematic diagram of an authentication process according to an embodiment of the present invention
  • FIG. 6 is a schematic flowchart of PPP dialing processing after successful authentication according to an embodiment of the present invention
  • FIG. 7 is a schematic flowchart of disconnecting PPP dialing processing according to an embodiment of the present invention.
  • the user terminal, the WAG server, and the PBG respectively support the following conditions:
  • the user terminal supports the following conditions:
  • the WAG server supports the following conditions:
  • the WAG server encapsulates parameters such as an IP address, a port number, and a bearer channel ID of the PBG application into a private header field, and adds the message to the Invite 200 OK message.
  • the format of the Invite 200 OK message is as follows:
  • tunnelID-id XXX 0
  • the WAG server (1) receiving an increase bearer channel request from the WAG server, and establishing a PBG to PDSN route request according to the Internet Protocol IP address information and port information allocated by the PDSN carried in the bearer channel request to the user terminal;
  • the WAG server returns an increased bearer channel response carrying a bearer channel identity code (ID, IDentity) allocated by the PBG to the user terminal;
  • ID bearer channel identity code
  • FIG. 2 is a schematic flowchart of an implementation of a method for implementing control and bearer separation according to an embodiment of the present invention.
  • the method is applied to an access network system, where the access network system includes a WAG server, a PDSN, and one or more PBGs;
  • the method for implementing control and bearer separation in this embodiment includes the following steps:
  • Step 201 When the WAG server receives the service request sent by the user terminal, the PBG that carries the bearer plane data of the service is selected for the user terminal.
  • Step 202 The PBG is notified to establish a route between the PBG and the PDSN, and the bearer plane data of the service related to the user terminal is transmitted through a route between the PBG and the PDSN.
  • the method further includes:
  • the WAG server notifies the user terminal of the information of the PBG
  • the method further includes:
  • the WAG server When receiving the service termination request sent by the user terminal, the WAG server notifies the PBG to release the route between the PBG and the PDSN.
  • the method further includes:
  • the route between the user terminal and the PBG is released.
  • the service termination request generally refers to a Bye request.
  • the notifying the PBG to establish a route between the PBG and the PDSN includes:
  • the PBG establishes a PBG to PDSN route according to the IP address information and the port information allocated by the PDSN carried in the request for the user terminal, and returns a bearer channel that the PBG carries the terminal to the WAG server.
  • the increase in ID carries the channel response.
  • the method further includes:
  • the WAG server After receiving the Invite message sent by the user equipment, the WAG server initiates a Generic Routing Encapsulation (GRE) tunnel registration request to the PDSN, and requests the PDSN to establish a GRE tunnel.
  • GRE Generic Routing Encapsulation
  • the PDSN After completing the establishment of the GRE tunnel, the PDSN returns a GRE tunnel registration response to the WAG server; after receiving the GRE tunnel registration response, the WAG server sends an add bearer channel request to the PBG.
  • the method further includes:
  • the WAG server After receiving the service termination request message sent by the user terminal, the WAG server obtains the bearer channel ID of the current PBG from the service termination request message, and sends a delete bearer channel to the PBG. Request.
  • the method further includes:
  • the WAG server returns an Invite success message carrying the private header field information of the PBG to the user terminal;
  • the terminal After receiving the Invite success message, the terminal locally establishes a route from the terminal to the PBG.
  • the private header domain information of the PBG includes at least the following information:
  • channel ID of the PBG IP address, port number, and 7
  • IP address, port number, and flow identifier of the PDSN IP address, port number, and flow identifier of the PDSN
  • the request to increase the bearer channel includes at least the following information:
  • WIFI IP and port number PDSN IP and port
  • the GRE tunnel registration response message carries the private header field information of the PDSN.
  • the method before the WAG server receives the Invite message sent by the user terminal, the method further includes:
  • the user terminal automatically initiates unified authentication and authentication, and sends an Invite message to the WAG server after the authentication succeeds.
  • the notifying the PBG to release the route between the PBG and the PDSN includes:
  • the PBG deletes the route from the PBG to the PDSN according to the bearer channel ID carried in the request for deleting the bearer channel, and returns a response of deleting the bearer channel to the WAG server.
  • FIG. 3 is a schematic structural diagram of a structure of an access network system for implementing control and bearer separation according to an embodiment of the present invention.
  • the access network system includes: a WAG server, a PDSN, and a On PBG; among them,
  • the WAG server is configured to: when receiving the service request sent by the user terminal, select a PBG that carries the bearer plane data of the service for the user terminal; and notify the PBG to establish a route between the PBG and the PDSN. ;
  • the PBG is configured to establish a route between the PBG and the PDSN, and transmit, by using the route between the PBG and the PDSN, bearer plane data of the service related to the user terminal.
  • the WAG server is further configured to notify the user terminal of the information of the PBG, so that the user terminal establishes a route between the user terminal and the PBG.
  • the WAG server is further configured to: when receiving the service termination request sent by the user terminal, notify the PBG to release the route between the PBG and the PDSN.
  • the WAG server is further configured to send an increase bearer channel request to the PDSN;
  • the PBG is further configured to: establish a PBG-to-PDSN route according to the Internet Protocol IP address information and port information allocated by the PDSN carried in the request to the user terminal, and return the PBG to the WAG server.
  • the WAG server is further configured to send a delete bearer channel request to the PDSN;
  • the PBG is further configured to delete a route of the PBG to the PDSN according to the bearer channel ID carried in the request for deleting the bearer channel, and return a response of deleting the bearer channel to the WAG server.
  • FIG. 4 is a schematic structural diagram of an access network system for implementing control and bearer separation according to an embodiment of the present invention.
  • the access network system architecture includes: a user terminal, an access node (AP, Access Point), and an interface.
  • An access node configured to provide a WIFI wireless link for the user terminal
  • the access node ensures that the user terminal can access the network side.
  • the AN-AAA server is configured to provide authentication data and authentication data for the WAG server, and charge the access user.
  • the PDSN is configured to establish a user terminal Point-to-Point Protocol (PPP) link, transmit a route of the terminal service flow to the service network, and perform charging for the terminal service flow.
  • PPP Point-to-Point Protocol
  • the access node, the AN-AAA server, and the PDSN have the same functions as the access network system in the C+W network in the prior art.
  • the access network system architecture further includes: a WAG server and one or more PBGs;
  • the WAG server is configured to separate the control plane data from the bearer plane data; and is further configured to send a request for adding or deleting a bearer channel to the PBG;
  • the PBG is configured to establish/release a route of the PBG to the PDSN according to the add/delete bearer channel request sent by the WAG server.
  • the WAG server is configured to process signaling conversion, service differentiation and aggregation, service flow routing, and the like when the terminal accesses the mobile core network, and shields the broadband network from the mobile core network.
  • the PBG is configured to carry PPP service data separated from the WAG server.
  • the system further includes: a local area network switch (LANS), configured to aggregate routes of each PBG, and configured to forward IP packets.
  • LSS local area network switch
  • the PBG is further configured to:
  • the PBG to the PDSN After receiving the request for the increase of the bearer channel sent by the WAG server, the PBG to the PDSN is established according to the IP address information and the port information allocated by the PDSN carried in the request to the user terminal, and is returned to the WAG server. PBG is the user terminal The assigned 7
  • the route of the PBG to the PDSN is deleted according to the bearer channel ID carried in the request for deleting the bearer channel, and the response of the bearer channel is deleted from the WAG server.
  • the WAG server is further configured to: after receiving the Invite message sent by the user terminal, initiate a GRE tunnel registration request to the PDSN, requesting the PDSN to establish a GRE tunnel;
  • the PDSN is further configured to return a GRE tunnel registration response to the WAG server after the GRE tunnel is established;
  • the WAG server is further configured to send an boost to the PBG after receiving the GRE tunnel registration response. 7 channel request;
  • the WAG server is further configured to: after receiving the service termination request message sent by the terminal, obtain the bearer channel ID of the current PBG from the service termination request, and send a request to delete the bearer channel to the PBG.
  • the WAG server is further configured to: after the PBG returns an increased bearer channel response carrying the bearer channel ID allocated by the PBG to the terminal, return the private header domain information carrying the PDSN and the private header field of the PBG to the terminal.
  • the Invite success message of the information is further configured to establish a route from the terminal to the PBG locally after receiving the Invite success message.
  • the private header domain information of the PBG includes at least the following information:
  • channel ID of the PBG IP address, port number, and 7
  • IP address, port number, and stream ID of the PDSN IP address, port number, and stream ID of the PDSN
  • the request to increase the bearer channel includes at least the following information:
  • WIFI IP and port PDSN IP and port
  • the GRE tunnel registration response message carries the private header domain information of the PDSN.
  • the user terminal automatically initiates a unified authentication and authentication before receiving the Invite message sent by the user terminal, and sends an Invite message to the WAG server after the authentication succeeds.
  • the user terminal performs bearer data transmission by using the PBG and the PDSN after the user terminal establishes the route of the user terminal to the PBG and the PBG establishes a PBG to the PDSN.
  • FIG. 5 is a schematic diagram of an authentication process according to an embodiment of the present invention. As shown in FIG. 5, the process includes the following steps:
  • Step 501 The terminal initiates a SIP (Signal) request message to the WAG server.
  • the WIFI switch on the terminal is turned on, scanning the open hotspots around, and automatically connecting to the hotspot with higher priority, and then automatically sending a Register request message to the WAG server through the WIFI link.
  • the terminal scans to three open hotspots, according to the order of priority: ChinaNet_HomeCW, ChinaNet_CW, ChinaNet, then the terminal will automatically connect to the highest priority ChinaNet_HomeCW hotspot.
  • the register request message of the SIP signaling carries the type of the authentication algorithm supported by the user identity card of the terminal.
  • the authentication algorithm may be a Cellular Authentication and Voice Encryption Algorithm (CAVE) or a Message Digest Algorithm 5 (MD5).
  • Step 502 After receiving the Register request message sent by the terminal, the WAG server selects an algorithm carried in the Register request message, and then returns an Unauthorized challenge message to the terminal.
  • the Unauthorized challenge message carries an authentication random number corresponding to the WAG selected authentication algorithm.
  • Step 503 After receiving the Unauthorized challenge message, the terminal parses the authentication random number from the Unauthorized challenge message, and calculates the authentication data according to the agreed authentication algorithm by the user identity card of the terminal. After the authentication data is calculated, the Register request message is re-initiated to the WAG server.
  • the Register Request message initiated to the WAG server carries both the authentication random number and the calculated authentication data.
  • Step 504 to step 505 After receiving the Register request message re-initiated by the terminal, the WAG server parses out the authentication random number and the authentication data, and sends the authentication random number, the authentication data, and the authentication algorithm. Go to the AN-AAA server for authentication.
  • Step 506 After receiving the authentication data sent by the WAG server, the AN-AAA server calculates the authentication data according to the authentication algorithm according to the authentication random number.
  • the authentication success message is returned to the WAG server, indicating that the authentication succeeds; if not, the authentication failure message is returned.
  • Step 507 to step 508 After receiving the authentication response message sent by the AN-AAA server, the WAG server returns the authentication response message to the terminal.
  • the terminal after receiving the authentication response message, the terminal presents the authentication result to the user in the form of a dialog box or a voice.
  • the terminal receives the authentication success response message, that is, after the authentication succeeds, the PPP dialing process flow as shown in FIG. 6 can be performed.
  • FIG. 6 is a schematic flowchart of PPP dialing processing after successful authentication according to an embodiment of the present invention. As shown in FIG. 6, the process includes the following steps:
  • Step 601 The terminal initiates an Invite message to the WAG server.
  • Step 602 to step 603 After receiving the Invite message sent by the terminal, the WAG server returns a tring response message to the terminal, and initiates a GRE tunnel registration request (Register Req) message to the PDSN to request the PDSN to establish a GRE tunnel of the A10 interface.
  • the WAG server After receiving the Invite message sent by the terminal, the WAG server returns a tring response message to the terminal, and initiates a GRE tunnel registration request (Register Req) message to the PDSN to request the PDSN to establish a GRE tunnel of the A10 interface.
  • a GRE tunnel registration request (Register Req) message
  • Step 604 After successfully establishing the GRE tunnel of the A10 interface, the PDSN returns a GRE tunnel registration reply (Register Reply) message to the WAG server.
  • GRE tunnel registration reply (Register Reply)
  • Step 605 After receiving the Register Reply message sent by the PDSN, the WAG server sends a Tunnel Establish Req message to the PBG.
  • the bearer channel setup request message carries the IP address and port information of the WIFI, the IP address and port information of the PDSN.
  • Step 606 to Step 607 After receiving the bearer channel setup request message sent by the WAG server, the PBG performs the following operations:
  • the tunnel Establish Reply message carries the channel ID information.
  • Step 608 After receiving the bearer channel setup response message sent by the PBG, the WAG server returns an invite success message to the terminal.
  • the message carries the GRE tunnel parameter allocated by the PDSN for the terminal: IP + Port
  • Step 609 to Step 610 After receiving the invite success response message returned by the WAG server, the terminal performs the following operations:
  • the parameters configured by the terminal for the PPP dialup process include: the IP and port number of the PBG, And the flow identification of the PDSN.
  • Step 611 After receiving the PPP dialing negotiation request sent by the terminal, the PBG finds the corresponding channel according to the IP address and the port number, and forwards the PPP dialing negotiation request message to the PDSN.
  • Step 612 to step 613 The PDSN returns a PPP dial-up negotiation response to the terminal through the PBG,
  • the identity security authentication may be performed by using a Challenge Handshake Authentication Protocol (CHP).
  • CHP Challenge Handshake Authentication Protocol
  • the CHAP is a 3-way handshake authentication protocol in the prior art, and does not directly transmit the user's plaintext password, and provides a secure identity verification by using the MD5 and the corresponding mechanism of the challenge.
  • the terminal After the PPP channel is successfully established, the terminal performs data services through the established PPP channel.
  • FIG. 7 is a schematic diagram of a process for disconnecting a PPP dialing process according to an embodiment of the present invention. As shown in FIG. 7, the process includes the following steps:
  • Step 701 The terminal initiates a Terminate Req message to the PBG.
  • the terminal closes the data switch and sends a Terminate Req request to the PBG.
  • Step 702 The PBG forwards the termination request message sent by the terminal to the PDSN.
  • Step 703 to step 704 After receiving the termination request message, the PDSN releases the Stream ID allocated to the terminal locally, and returns a Terminate Ack message to the terminal through the PBG. Steps 705 to 706: After the terminal waits for the set duration Terminating the connection; then initiating a Downe Req message to the WAG server;
  • the set duration may be set according to actual conditions, for example, may be set to 2s.
  • the Bye Req message carries an X-CT-Tunnel and a Pbg-timnel.
  • Step 707 After receiving the Bye Req message sent by the terminal, the WAG server initiates a GRE tunnel registration request (Unregister Req) message to the PDSN.
  • GRE tunnel registration request Unregister Req
  • Step 708 After receiving the removal registration request message, the PDSN returns a GRE tunnel registration response (Unregister Reply) message to the WAG.
  • GRE tunnel registration response Unregister Reply
  • Step 709 After receiving the Unregister Reply message sent by the PDSN, the WAG server initiates a Tunnel Del Req message to the PBG.
  • the Tunnel Del Req message carries the channel ID assigned by the PDSN to the terminal.
  • the channel ID that is, the tunnel ID.
  • Step 710 After receiving the bearer channel deletion request message sent by the WAG server, the PBG deletes the established channel according to the channel ID carried in the request message, and then returns a Tunnel Del Reply message to the WAG server.
  • Step 712 After receiving the Tunnel Del Reply message sent by the PBG, the WAG server returns a downlink success response message to the terminal.
  • the terminal may be a terminal, or a tablet computer, or a terminal such as a smart TV.
  • the invention can process the bearer plane data by adding PBG, which not only can reduce the load of the WAG server, but also can effectively improve the capacity and performance of the WAG server, and can also greatly improve the stability of the C+W service.
  • the WAG server when receiving the service request sent by the user terminal, the WAG server selects a PBG that carries the bearer plane data of the service for the user terminal, and notifies the PBG to establish a route between the PBG and the PDSN. Transmitting plane data of the service related to the user terminal by using a route between the PBG and the PDSN. So, not only has it been reduced
  • the load of the WAG server effectively improves the capacity and performance of the WAG server, and also improves the stability of the C+W service.

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

Abstract

L'invention concerne un procédé pour mettre en œuvre une séparation entre une commande et un porteur. Le procédé peut être appliqué à un système de réseau d'accès. Le système de réseau d'accès comprend un serveur de passerelle d'accès sans fil (WAG), un nœud de service de données de progiciel (PDSN), et plus d'une passerelle de porteur de données de protocole (PBG) point à point. Le procédé consiste à : lorsque le serveur de WAG reçoit une requête de service envoyée par un terminal utilisateur, sélectionner une PBG pour porter des données de plan de porteur d'un service pour le terminal utilisateur ; donner l'instruction à la PBG d'établir une route entre la PBG et le PDSN ; et transmettre les données de plan de porteur du service pertinent au terminal utilisateur par l'intermédiaire de la route entre la PBG et le PDSN. Egalement, l'invention concerne en outre un système de réseau d'accès pour mettre en œuvre une séparation entre une commande et un porteur.
PCT/CN2013/087604 2013-09-16 2013-11-21 Procédé et système de réseau d'accès pour mettre en œuvre une séparation entre une commande et un porteur WO2014161319A1 (fr)

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CN201310422843.6A CN104469844B (zh) 2013-09-16 2013-09-16 一种实现控制与承载分离的方法及接入网系统
CN201310422843.6 2013-09-16

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