WO2010108321A1 - Procédé, appareil et système pour fournir un serveur de routage pour un routeur de dispositif côté client - Google Patents

Procédé, appareil et système pour fournir un serveur de routage pour un routeur de dispositif côté client Download PDF

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Publication number
WO2010108321A1
WO2010108321A1 PCT/CN2009/071014 CN2009071014W WO2010108321A1 WO 2010108321 A1 WO2010108321 A1 WO 2010108321A1 CN 2009071014 W CN2009071014 W CN 2009071014W WO 2010108321 A1 WO2010108321 A1 WO 2010108321A1
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Prior art keywords
router
vrf
access
access device
routing
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PCT/CN2009/071014
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English (en)
Chinese (zh)
Inventor
罗鹏
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Priority to PCT/CN2009/071014 priority Critical patent/WO2010108321A1/fr
Priority to CN200980159438.1A priority patent/CN102362467B/zh
Publication of WO2010108321A1 publication Critical patent/WO2010108321A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/20—Selecting an access point

Definitions

  • the present invention relates to communication technologies, and in particular, to a method, device and system for providing a routing service. Background technique
  • wireless routers With the wide application of wireless communication technologies, routers supporting wireless access have emerged in the industry, referred to as wireless routers, and wireless access technologies are used in the uplink direction.
  • the wireless router can be regarded as a CE Router (Customer Edge Router).
  • the GGSN (Gateway GPRS Support Node) uses the wireless router as an MS (Mobile Station) to route hosts in the station to which the wireless router is connected. Summary of the invention
  • the main technical problem to be solved by the embodiments of the present invention is to provide a method, device and system for providing a routing service, so that an accurate route can be provided for a host in a site connected to a user edge router.
  • an embodiment of the present invention provides a method for providing a routing service, including: determining whether an access device is a user edge device router CE Router, and the CE Router uplink supports wireless access; When it is a CE Router, it provides routes for the site corresponding to the CE Router.
  • the embodiment of the present invention further provides a device for providing a routing service, including: a first unit, configured to determine whether an access device is a user edge device router CE Router, the CE Router uplink supports wireless access; and a second unit And when the first unit determines that the access device is a CE router, providing a routing service for the site corresponding to the CE router.
  • a device for providing a routing service including: a first unit, configured to determine whether an access device is a user edge device router CE Router, the CE Router uplink supports wireless access; and a second unit And when the first unit determines that the access device is a CE router, providing a routing service for the site corresponding to the CE router.
  • the embodiment of the present invention further provides a system for providing a routing service, including: the device that provides the routing service, and the CE router that communicates with the device, where the CE Router supports wireless access.
  • the PE router determines whether the access device is a CE Router, and if so, provides a routing service for the corresponding site. In this way, the problem that only the wireless router can be accessed as a normal MS in the prior art is solved.
  • FIG. 1 is a schematic diagram of a network structure of a solution in the prior art
  • FIG. 2 is a network structure diagram provided by an embodiment of the present invention.
  • FIG. 3 is a flowchart of a method according to an embodiment of the present invention.
  • FIG. 5 is a flowchart of another method according to an embodiment of the present invention.
  • FIG. 6 is a schematic structural diagram of a device according to an embodiment of the present invention. detailed description
  • 3G router 3G Router
  • ADSL Asymmetric Digital Subscriber Line
  • the radio access technology is used in the uplink direction, for example, GPRS (General Packet Radio Service) / UMTS ( Universal Mobile Telecommunications System, /HSPA (High-Speed Packet Access) technology.
  • GPRS General Packet Radio Service
  • UMTS Universal Mobile Telecommunications System
  • HSPA High-Speed Packet Access
  • FIG. 1 it is a schematic structural diagram of a prior art solution, where a 3G router corresponds to one site, and the corresponding network segment of the site is 10.111.1.0/24, and multiple hosts are connected in the network segment (for example, The IP addresses are 10.111.1.1, 10.111.1.2 and 10.111.1.3).
  • the GGSN treats the 3G Router as a normal MS and assigns it an MS IP Address (for example, 200.131.69.83).
  • the 3G router can provide Internet services for hosts in the site through the IP address.
  • the GGSN since the GGSN only knows the IP address of the node (3G Router) and does not have the routing information of the 10.111.1.0/24 network segment, it cannot send the headquarters. The packet is correctly routed to the host under the node. Therefore, the 3G Router cannot be used as the CE Router to access the VPN (Virtual Private Network).
  • the GGSN cannot provide VPN routes for the node.
  • the embodiment of the present invention provides the following solutions.
  • the embodiments of the present invention are applicable to UMTS, WIFI (Wireless Fidelity), WIMAX (Worldwide Interoperability for Microwave Access), HSPA, LTE (long time evolution, long term evolution, etc.) system.
  • WIFI Wireless Fidelity
  • WIMAX Worldwide Interoperability for Microwave Access
  • HSPA High Speed Packet Access
  • LTE Long time evolution, long term evolution, etc.
  • a wireless router (such as a 3G router) can serve as a CE router, and the CE Router belongs to a part of the user network, and interfaces with a PE (Provider Edge, Service Provider Edge Router).
  • the GGSN on the core network side can act as a PE Router, and the PE router belongs to a part of the service provider network connected to the CE router.
  • the CE Router and the PE Router can access the VPN (Virtual Private Network) at the same time.
  • the wireless router that can be used as the CE Router is not limited to the 3G Router.
  • the network device that can be used as the PE router is not limited to the GGSN.
  • it may be a PDSN (Packet Data Serving Node), an ASN GW (Access Service Network Gateway), a PDN. GW (Public Data Network Gateway), Serving GW (Serving Gateway), etc.
  • 3G Routers may be connected to multiple sites (or networks). These sites may be SMEs (Small and medium enterprises) or a network of multiple individual users. Each site has a corresponding network segment.
  • the hosts in the site can be PC (Personal Computer), lapto laptop, MS (Mobile Station), Router Router, PDA (Personal Digital Assistant., Pocket PC). , Workstation workstations, Server servers and other terminal devices that support the TCP/IP protocol.
  • the CE router is a 3G router
  • the PE router is a GGSN
  • the host is a PC.
  • the description is not limited to this.
  • a method for providing a routing service including the following steps: Step A: determining whether the access device is a user edge device router CE Router, and the CE Router uplink supports wireless access; Step B: when determining access When the device is a CE Router, it provides routes for the sites corresponding to the CE Router.
  • the technical solution provided by the embodiment of the present invention provides a method for identifying whether the access device is a CE.
  • the mechanism of the router can be used to provide a route for the corresponding site when the access device is a CE router. This solves the problem that the wireless router cannot access the VPN as a CE in the prior art.
  • the CE router is a 3G router
  • the PE router is a GGSN
  • the host is a PC.
  • FIG. 2 is a schematic diagram of a network structure provided by an embodiment of the present invention
  • FIG. 3 is a schematic flowchart of a method for providing a routing service according to an embodiment of the present invention.
  • Step 301 The GGSN determines whether the access device is a 3G router or a normal access terminal. If it is a 3G router, go to step 302. If it is a normal MS, go to step 305.
  • the method for determining may be: The GGSN determines that the access device is 3G according to the identifier of the access device.
  • the Router is also an ordinary access terminal.
  • the foregoing judgment may be implemented in the process of the 3G Router applying to the GGSN to activate the PDP Context.
  • the basis for the judgment may be the type of the access device (which can be understood as a terminal), and the type of the access device may be mapped to the identifier of the access device, such as IMEI (International Mobile Station Equipment Identity), IMSI (IMSI) International Mobile Subscriber Identity, International Mobile Subscriber Identity). Therefore, the GGSN can judge (or determine/identify) the access device as a 3G Router or an ordinary access terminal according to the identifier of the access device.
  • IMEI International Mobile Station Equipment Identity
  • IMSI International Mobile Subscriber Identity
  • whether the access device is a 3G router information (which can be represented by a mapping relationship between the identifier and the device) can be saved in an external server or configured locally in the GGSN.
  • Figure 2 shows the above two implementations: First, the local configuration mode: The mapping relationship between the IMSI and the 3G Router is saved in the GGSN. In this way, the GGSN can find (or check) the saved mapping relationship after learning the IMSI of the current access device to determine whether the access device corresponding to the IMSI is a 3G Router. Second, the way the mapping relationship is saved on the external server: The mapping between the IMSI and the 3G Router is stored in the external server.
  • the external server can be: Radius (Remote Authentication Dial-In User Service), PCRF (Policy Control and Charging Rules Function) Control and charging rules function nodes) and so on.
  • Radius Remote Authentication Dial-In User Service
  • PCRF Policy Control and Charging Rules Function
  • Control and charging rules function nodes and so on.
  • the mapping relationship may be searched (or checked) in a manner of accessing the external server, and matched with the IMSI of the current access device to determine.
  • the operator may assign a special identification number segment (such as an IMSI number segment) to the 3G router, or may allocate discrete
  • the identification number is given to the 3G Router and the normal MS, which is not limited by the solution of the embodiment of the present invention.
  • the GGSN may also determine whether the access device is a 3G Router by using an access point name (Access Point Name) that the access device requests to access.
  • access point Name access point Name
  • the mapping relationship between the APN and the 3G Router can also be used in the local configuration of the GGSN or the external server, and will not be described in detail.
  • the VRF attribute information of the corresponding site Site can be obtained.
  • the VRF attribute information can be configured locally in advance or from an external server (which can be understood as a user database, such as a Profile Server).
  • the above attribute information may include: VRF name, RT (Route Target), RD (Route Distinguishes).
  • the RD is used to identify a VRF.
  • the RT can also be called a VPN target attribute. It is mainly used to implement communication between different VRFs. For example, it defines which sites a VPN route can receive, and which sites the PE can receive. The route sent. For example, the subsidiary A and the subsidiary B, A and B of the parent company are different (that is, the VRF is different), but the RT is the same, then the other party's route is imported into each other.
  • Step 302 The GGSN generates a VRF for the site corresponding to the 3G router.
  • the GGSN may generate a VRF for the corresponding site of the 3G Router according to the obtained VRF attribute information.
  • VRF VPN Routing/Forwarding instance
  • a VRF is an abbreviation of VPN routing and forwarding instance. It is usually only found on the PE Router. The routing of each site under the same VPN is controlled by VRF. For each site, there is usually a corresponding VRF.
  • a VRF is defined VPN membership of the customer site connected to the PE router.
  • a VPN is a virtual private network, which can help remote users, company branches, business partners and suppliers establish a trusted and secure connection with the company's intranet and ensure data. Safe transmission.
  • a VRF data can include an IP routing table, a derived Cisco Express Forwarding (CEF) table, a set of interfaces that use forwarding tables, a set of rules that control information in the routing table, and routing protocol parameters.
  • CEF Cisco Express Forwarding
  • the GGSN can maintain multiple VRFs. Each VRF can be relatively independent. Different VRFs can be distinguished by VRF RD. A site with the same VRF RD can form a VPN. Different VPNs can communicate or be isolated. In addition, the GGSNs that process different sites may be the same GGSN or may belong to different GGSNs.
  • the corresponding VRF A is generated for the site Site A-1.
  • a VRF can correspond to multiple 3G Router sites.
  • the processing result can be: Sites Site A-1, A-2, and A-3 use the same VRF A to form a VPN A, and Sites Site B-1 and B-2 use the same VRF B to form a common A VPN B.
  • Step 303 The GGSN generates a route of the VRF by using a routing protocol.
  • the GGSN obtains routing information of the 3G Router through a static route or a dynamic routing protocol.
  • the VRF can be understood as a data structure that points to the routing table.
  • the routing information obtained by the GGSN can be configured into the generated VRF, whether through a static route or a dynamic routing protocol.
  • the GGSN configures the routing information of the obtained 3G router to the VRF generated for the corresponding site, that is, the route of the VRF is generated (the route can be periodically updated or falsified).
  • the GGSN and the 3G router can run a static routing protocol and/or a dynamic routing protocol, and the routing information is exchanged by using the routing protocol.
  • the routing information of the 3G router can be obtained from the perspective of the GGSN.
  • the routing information can include 3G.
  • Network information of the site corresponding to the router such as IP address, network mask, next hop address, and hop count.
  • a site corresponding to a 3G router may have one or more network segments. There are multiple IP addresses under one network segment, and one IP address may correspond to one host.
  • the static route is a fixed routing table set in the router.
  • the static route does not change unless the network administrator intervenes.
  • the GGSN can obtain routing information under the corresponding site of the 3G Router through local configuration or an external server, as described above, externally.
  • the server can be a Radius Server, a PCRF, or the like.
  • the network planning that is, the IP address segment
  • Dynamic routing is the process of routing routing information between routers in a network and updating the router table with the received routing information.
  • the GGSN exchanges routing information with the 3G router to update the routing table according to the latest routing information.
  • the dynamic routing protocol can be OSPF (Open Shortest Path First), RIP (Routing Information Protocol), and BGP (Border Gateway Protocol).
  • Step 304 The GGSN provides a routing service for the site corresponding to the 3G router according to the generated route of the VRF.
  • the routing service is a VPN service as an example.
  • the GGSN can be used as a PE router to access the MPLS (Multiprotocol Label Switching) VPN network, and provide MPLS VPN services to the sites (including hosts in the site) of the 3G router, that is, 3G.
  • the site corresponding to the Router forwards the service data.
  • the MPLS VPN is only one type of VPN.
  • the technical solution provided by the embodiment of the present invention is also applicable to the PPTP point-to-point tunneling protocol, the L2F Layer 2 forwarding protocol, the L2TP Layer 2 tunneling protocol, and the GRE (Generic). Routing Encapsulation, Generic Routing Encapsulation Protocol, and VPNs such as IPSec IP Security.
  • Step 305 The GGSN processes the normal access terminal according to an existing process.
  • the GGSN allocates one to the MS.
  • IP Address correspondingly, there is only an absolute route (PDP Context) to the address on the GGSN. Since it is an existing technology, it will not be described again.
  • the technical solution provided by the embodiment of the present invention determines the type of the access device by the PE router. If the access device is a CE router, the routing information is exchanged according to the obtained routing information. The site provides routing.
  • the technical solution provided by the embodiment of the present invention is to use the 3G router as the CE router as a gateway, and the PE router can learn the routing information of the CE router, so that the 3G router can be used as a CE to access the VPN. Therefore, it is possible to support the use of VPN services by connecting multiple networks (such as enterprise networks) or connecting multiple user equipments (mobile devices or fixed devices) under the CE Router, which provides an implementation possibility for the extension of the carrier service. For example, provide some value-added VPN features for SMB customers.
  • the CE router is a 3G router
  • the PE router is a GGSN
  • the host is a PC.
  • Figs. 4 and 5 is a network structure diagram of an embodiment of the present invention
  • FIG. 5 is a schematic flowchart of a method according to an embodiment of the present invention. The program includes the following steps:
  • Step 501 The GGSN determines that the access device is a 3G Router.
  • step 301 is similar to step 301 and will not be described in detail. It should be noted that this embodiment does not pay attention to the case where the access device is a normal MS, and thus is not described.
  • Step 502 The GGSN configures a predefined user policy for the site corresponding to the 3G router.
  • the configured user policy can be static, for example, pre-defined before the PDP is activated.
  • the user policy can be configured locally or by a policy server (Policy Server as shown in Figure 4).
  • the user policy can include any one or a combination of the following policies: Routing Policy / Business Policy / QoS Policy.
  • the configuration policy may be performed for the entire site, or may be performed for a certain network segment (or part of the network segment) of a certain site, or for a specific IP address.
  • the site is associated with the VRF, it can be understood as the configuration of the VRF for the site corresponding to the 3G Router (the user policy can be understood as one of the attributes of the VRF).
  • the implementation of the VRF is specifically described in the previous embodiment, and will not be described again here. If you want to configure the network segment or IP address, you need to know the network information under the site first. (The network information can be statically configured in advance, for example, statically configured locally.)
  • Site MyHome for a VRF
  • QoS: 1M bps etc.
  • Site MyOffice corresponding to a VRF
  • IP address Dynamic (dynamically assigned IP address)
  • QoS: 2M bps etc.
  • the network segment or the IP address is configured as the configuration object, you can configure different routing policies for different network segments or IP addresses on the Router. For example, the network segment of the president's office directly forwards the data of the common employee network segment. Configure an information security check on a server. ⁇ Configure different service policies for different network segments or IP addresses on the Router (for example, whether to allow P2P services, access to the Internet, etc.); IP Address configures different QoS policies (for example, the president's office network segment needs to guarantee 2M bps bandwidth).
  • it may also include:
  • Step 503 The GGSN dynamically updates the configured policy according to the network information of the 3G Router.
  • the routing policy between the GGSN and the 3G router can be dynamically updated according to the network information of the 3G Router. For example, when a network segment/IP address is added, modified, or deleted under the 3G router, the GGSN can exchange the routing information with the 3G router according to the latest network information. The strategy is updated in real time. Of course, due to the characteristics of the routing protocol itself, the GGSN and the 3G Router can periodically exchange routing information.
  • the technical solution provided by the embodiment of the present invention can provide different user policies for the site corresponding to the CE Router, so as to meet different sites (corresponding to different interfaces) on the premise that the access device is a CE router. Differentiated service requirements for the network or user group).
  • multiple user policies can be flexibly combined, and can be configured for site level, network segment level, or specific IP address, further implementing refined differential configuration management.
  • FIG. 6 is a schematic structural diagram of a device.
  • the device includes: a first unit 601, configured to determine whether the access device is a user edge device router CE Router, the CE Router uplink supports wireless access, and a second unit 602, configured to: when the first unit determines that the access device is a CE The router provides routing services for the sites corresponding to the CE Router.
  • the first unit 601 may be implemented by the following sub-units (not shown): for example, the first sub-unit is configured to determine, according to the identifier of the access device, whether the access device is a CE Router; or, The second subunit is configured to determine the access according to the access point name APN that the access device requests to access. Whether the device is a CE Router.
  • the identifier of the access device may be an IMEI or an IMSI, and the mapping between the identifier of the access device and the CE router may be saved locally or in an external server. The method embodiment has been described in detail herein. Let me repeat.
  • the second unit 602 may be implemented by a sub-unit (not shown): the third sub-list generates a route for the VRF generated by the third sub-unit through a routing protocol; and a fifth sub-unit, configured to The route of the VRF generated by the four sub-units forwards the service data for the site corresponding to the CE Router.
  • the specific implementation of the route for generating the VRF may be as follows: The routing information of the 3G router is obtained through the static route or the dynamic routing protocol, and is configured to be generated into the generated VRF. The method embodiment has been described in detail, and will not be described here.
  • the foregoing third sub-unit may be implemented by the following sub-module (shown in the figure): an obtaining sub-module, configured to acquire a CE Router during or after determining whether the access device is a CE Router in the first unit.
  • the VRF attribute information of the corresponding site and a generating submodule, configured to generate a VRF for the site corresponding to the CE Router according to the VRF attribute information acquired by the acquiring submodule.
  • the device may further include: a third unit, configured to configure a corresponding user policy for the site corresponding to the CE router, or configured for different network segments or IP addresses of the site corresponding to the CE Router The corresponding user policy.
  • the user policy includes any one or a combination of the following policies: a routing policy, a business policy, or a QoS policy.
  • the device may further include a fourth unit, configured to dynamically update the user policy configured by the third unit according to the network information under the CE Router.
  • the device can be used as a PE router, and specifically: a GGSN, a PDSN, an ASN GW, a PDN GW, a Serving GW, and the like.
  • a further embodiment of the present invention further provides a system for providing a routing service, including a device for providing a routing service, and a CE router for communicating with the device, where the CE Router supports wireless access.
  • the CE Router can be a wireless router, and the wireless router that can be used as the CE Router is not limited to the 3G Router. For example, it can also support 2G, 2.5G, 4G, and other possible support for other systems in the future. Into the wireless router, it can also support multiple wireless systems at the same time The wireless router that is connected, and it can also be a router that supports both wireless and wired access. In addition, there may be multiple types of networks connected to the wireless router, and there may be multiple types of hosts in the network, which are not described here.
  • the system may also include other network elements, for example, the UMTS system between the 3G Router and the GGSN as shown in FIG. 1 (which may specifically include a base station and a base station control device), as shown in FIG. 2
  • the external server server is configured to save the mapping relationship between the access device identifier/APN and the wireless router, such as the policy server Policy Server in FIG. 4, for storing the user policy, and can be used by the GGSN or other devices providing the routing service for querying.
  • the type of the access device is determined by the PE router. If the access device is a CE router, the routing information is exchanged with the routing information, and the obtained routing information is the corresponding site. Provide routing.
  • the technical solution provided by the embodiment of the present invention is to use the 3G router as the CE router as a gateway, and the PE router can obtain the routing information of the CE router, so that the 3G router can be used as a CE to access the VPN. Therefore, it is possible to support the connection of multiple networks (such as enterprise networks) or connect multiple user equipments (mobile devices or fixed devices) under the CE Router to use VPN services, which provides opportunities for the expansion of carrier services, for example, for SMEs. Customers offer some value-added VPN features.
  • the access device is a CE router
  • different user policies are provided/configured for the site corresponding to the CE router, thereby satisfying different services of different sites (corresponding to different networks or user groups).
  • multiple user policies can be flexibly combined, and can be configured for site level, network segment level, or specific IP address, further implementing refined differential configuration management.
  • receiving in the embodiment of the present invention may be understood as being actively acquired from other modules, or may be receiving information sent by other modules.
  • each functional unit in various embodiments of the present invention may be integrated into one processing module. It is also possible that each unit physically exists alone, or two or more units may be integrated in one module.
  • the above integrated modules can be implemented in the form of hardware or in the form of software functional modules.
  • the integrated modules, if implemented in the form of software functional modules and sold or used as separate products, may also be stored in a computer readable storage medium.
  • the above-mentioned storage medium may be a read only memory, a magnetic disk or an optical disk or the like.

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  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention porte sur un procédé, un appareil et un système pour fournir un service de routage. Le procédé comprend les étapes suivantes : il est déterminé si l'appareil d'accès est ou non un routeur de dispositif côté client (routeur CE), et si le routeur CE supporte un accès sans fil en liaison montante; lorsqu'il est confirmé que l'appareil d'accès est le routeur CE, le service de routage est fourni pour le site correspondant au routeur CE. Selon la solution technique décrite par le mode de réalisation de la présente invention, le problème de l'état de la technique dû au fait que le routeur sans fil est uniquement accessible en tant que MS commun peut être résolu.
PCT/CN2009/071014 2009-03-26 2009-03-26 Procédé, appareil et système pour fournir un serveur de routage pour un routeur de dispositif côté client Ceased WO2010108321A1 (fr)

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PCT/CN2009/071014 WO2010108321A1 (fr) 2009-03-26 2009-03-26 Procédé, appareil et système pour fournir un serveur de routage pour un routeur de dispositif côté client
CN200980159438.1A CN102362467B (zh) 2009-03-26 2009-03-26 一种提供路由服务的方法、设备和系统

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PCT/CN2009/071014 WO2010108321A1 (fr) 2009-03-26 2009-03-26 Procédé, appareil et système pour fournir un serveur de routage pour un routeur de dispositif côté client

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