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WO2008040212A1 - Procédé, système et dispositif d'accès au réseau - Google Patents

Procédé, système et dispositif d'accès au réseau Download PDF

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Publication number
WO2008040212A1
WO2008040212A1 PCT/CN2007/070658 CN2007070658W WO2008040212A1 WO 2008040212 A1 WO2008040212 A1 WO 2008040212A1 CN 2007070658 W CN2007070658 W CN 2007070658W WO 2008040212 A1 WO2008040212 A1 WO 2008040212A1
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WO
WIPO (PCT)
Prior art keywords
function entity
user
address
distribution
nass
Prior art date
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Ceased
Application number
PCT/CN2007/070658
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English (en)
Chinese (zh)
Inventor
Weilong Ouyang
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Filing date
Publication date
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Publication of WO2008040212A1 publication Critical patent/WO2008040212A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00—Network architectures or network communication protocols for network security
    • H04L63/08—Network architectures or network communication protocols for network security for authentication of entities
    • H04L63/0815—Network architectures or network communication protocols for network security for authentication of entities providing single-sign-on or federations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/70—Admission control; Resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00—Network architectures or network communication protocols for network security
    • H04L63/20—Network architectures or network communication protocols for network security for managing network security; network security policies in general
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00—Network architectures or network communication protocols for network security
    • H04L63/10—Network architectures or network communication protocols for network security for controlling access to devices or network resources
    • H04L63/104—Grouping of entities

Definitions

  • the present invention relates to access technologies, and more particularly to a method, system and device for implementing network access. Background of the invention
  • FIG. 1 is a schematic diagram of a prior art TISPAN QoS architecture.
  • a transport control layer that is, a resource admission subsystem (RACS)
  • AF service layer
  • RACS transport layer
  • the RACS is composed of a Service Policy Decision Function Entity (SPDF) and an Access Network Resource Admission Control Function Entity (A-RACF), where the SPDF is used to manage the access network and the core according to the resource and policy control request of the service delivered by the AF.
  • Network resource and policy control; A-RACF is used for resource admission control and policy deployment of the access network according to the user's profile.
  • the AF is used to request network resources and policy control according to the user's service request, and to provide services for the user.
  • the AF finds the A-RACF through the SPDF, thereby implementing control of the access network resources, such as resource application and release, and QoS policy. Deployment, etc.
  • the AF requests the user to use the resource and control policy of the service through the Gq' interface, and the RACS sends the resource request and control policy to the edge node (IP Edge) of the corresponding access network and the core border node device (Core Border Node). Perform resource allocation and policy enforcement.
  • IP Edge edge node
  • Core Border Node core border node
  • the IP Edge is connected to the IP transport network; the Network Connection Management Subsystem (NASS) has only data and control interfaces with the IP Edge, and is used for authentication, authorization, and address assignment of users on the access network, and through the e4 interface.
  • the RACS notifies the user of the user information such as the attribute and the user IP address.
  • the IP Edge includes a Layer 2 Transport Termination Function (L2TF) entity and a Resource Control Execution Function Entity (RCEF), where the L2TF is used to terminate the Layer 2 transmission information of the user packet.
  • the RCEF is used to execute the resource control and policy control commands delivered by the RACS.
  • the core border node is configured to perform corresponding resource control and policy control according to a control instruction of a core network edge gateway function entity (C-BGF), where the C-BGF performs resource control and policy for the core network delivered by the SPDF according to the profile of the service. Controlled instructions.
  • C-BGF core network edge gateway function entity
  • the Customer Premises Equipment is used to carry the user's message on the corresponding line technology and transmit it to the access node (AN, Access Node), and the AN is responsible for terminating the access line of the user, such as xDSL, PON, Wimax, and the like.
  • the NGN network of the TISPAN QoS architecture supports the user's mobility, that is, when the user moves, the mobile IP, such as MIPv4 or MIPv6, can be used to solve the problem that the user's IP address does not change.
  • SPDF does not store user information, and the information related to the network carried by the AF is only the user IP address, and the topology relationship between SPDF and A-RACF in the TISPAN QoS architecture is a pre-configured static configuration.
  • Information for example, the SPDF configures the communication address of the A-RACF to which it belongs according to the address segment of the access network.
  • the main purpose of the present invention is to provide a method for implementing network access, which can dynamically establish a topology relationship between a central policy decision function entity and a distribution or access policy function entity, so as to ensure that the user normally implements network access.
  • Another object of the present invention is to provide a system for implementing network access and a central policy decision function entity, which can dynamically establish a topology relationship between a central policy decision function entity and a distribution or access policy function entity to ensure that the user normally implements network access.
  • a method for implementing network access including:
  • the central policy decision function entity establishes a correspondence between the user and the distribution or access policy functional entity according to the user route information sent by the distribution or access policy function entity and the information of the distribution or access policy function entity.
  • a system for implementing network access comprising: a network connection management subsystem NASS, a central policy decision function entity, and a distribution or access policy function entity, the NASS through a distribution or access policy functional entity and a central policy decision function
  • the entities are connected, and the user accesses the network through NASS.
  • the distribution or access policy function entity receives user information from the NASS carrying the user address, the currently available central policy decision function entity address, or the distribution or access policy function entity receiving the carried user address from the NASS User information;
  • the available or designated central policy decision function entity receives user routing information carrying a user address from a distributed or access policy functional entity, and establishes a correspondence between the user and the distribution or access policy functional entity.
  • a central policy decision function entity including:
  • a distribution or access policy function entity interface unit configured to receive user routing information sent by the distribution or access policy function entity, and provide the information to the corresponding relationship establishing unit;
  • the correspondence establishing unit is configured to establish a correspondence between the user and the distribution or access policy functional entity according to the user routing information received by the distribution or access policy function entity interface unit and the distribution or access policy function entity information.
  • the user dynamically establishes a correspondence between a user and a current network distribution or an access policy functional entity in a central policy decision function entity in a process of user network access, that is, dynamically establishing a central policy.
  • the topological relationship between the decision function entity and the distribution or access policy function entity In this way, when the AF sends a resource request to the central policy decision function entity, the central policy decision function entity may find the distribution or access to which the central policy decision function entity belongs according to the corresponding relationship between the user and the distribution or access policy function entity.
  • the policy function entity realizes the topology automatic discovery of the central policy decision function entity and the distribution or access policy function entity, ensuring that the user normally implements network access.
  • the central policy decision function entity may be specifically SPDF, and the distribution or access policy function entity may be specifically A-RACF.
  • FIG. 1 is a schematic diagram of a prior art TISPAN QoS architecture
  • Figure 2 is a flow chart of the method of the present invention
  • FIG. 3 is a schematic diagram of a system according to Embodiment 1 of the present invention.
  • FIG. 4 is a schematic structural diagram of an SPDF according to Embodiment 1 of the present invention.
  • Figure 5 is a flow chart of Embodiment 1 of the present invention.
  • FIG. 6 is a schematic diagram of a system according to Embodiment 2 of the present invention.
  • FIG. 7 is a flow chart of Embodiment 2 of the present invention.
  • FIG. 8 is a schematic diagram of a system according to Embodiment 3 of the present invention.
  • Embodiment 9 is a flowchart of Embodiment 3 of the present invention.
  • FIG. 10 is a schematic diagram of an IP lookup table. Mode for carrying out the invention
  • the core idea of the present invention is: a user access network, a distribution or access policy function entity sends user routing information to a central policy decision function entity; a central policy decision function entity according to received user routing information and a distribution or access policy via Functional entity information, establishing a correspondence between a user and a distribution or access policy functional entity.
  • the central policy decision function entity may be specifically SPDF, and the distribution or access policy function entity may be specifically A-RACF.
  • the SPDF is used as the central policy decision function entity, and the A-RACF is used as the The distribution or access policy function entity is described as an example.
  • each access network is controlled by NASS and A-RACF.
  • FIG. 2 is a flowchart of the method of the present invention.
  • the user accesses the network, and the NASS sends user information to the A-RACF.
  • the user accesses the network, and the user authenticates and succeeds when requesting to use the service.
  • the user IP address is assigned. This process belongs to the prior art. For details, refer to related protocols, and details are not described here.
  • the method of the invention further comprises the following steps:
  • Step 200 A-RACF sends user routing information to SPDF.
  • the SPDF in this step may be a preset SPDF available in the N AS S or a designated SPDF pre-configured in the A-RACF. Different SPDFs can be distinguished by different SPDF addresses.
  • the available or specified SPDF can be an SPDF corresponding to the service, for example, service 1 corresponds to SPDF1, SPDF2, and service 2 corresponds to SPDF1, SPDF3, and the like.
  • the specific implementation can be configured according to the actual situation.
  • a communication negotiation parameter between the SPDF and the A-RACF is preset, and the communication negotiation parameter refers to a parameter for establishing a communication link between the A-RACF and the SPDF, such as a key and the like, in the home network. It may be referred to as a home communication negotiation parameter, which may be referred to as a visited communication negotiation parameter in a visited network.
  • the NASS After the user accesses the network, the NASS sends the user information to the A-RACF.
  • the user information includes at least the successfully assigned user IP address, the currently available or designated SPDF address, and may also include the communication negotiation parameters between the SPDF and the A-RACF.
  • the A-RACF After receiving the user information, the A-RACF will generally send a response to the NASS.
  • the method further includes the A-RACF performing communication link negotiation with the SPDF corresponding to the SPDF address by using the received communication negotiation parameter to establish a communication link.
  • SPDF learns the A-RACF information such as the A-RACF address;
  • A-RACF sends user routing information such as user IP address to SPDF through the established communication link.
  • Step 201 The SPDF establishes a correspondence between the user and the A-RACF according to the received user routing information and the A-RACF information.
  • the correspondence between the user and the A-RACF in this step can be represented by a correspondence table between the user IP address and the A-RACF address.
  • FIG. 10 is a schematic diagram of an IP lookup table.
  • the index of the IP lookup table is a user IP address, and the content of the IP lookup table may include:
  • Basic information such as the user's IP address, the user's current location information (attribution or place of visit), etc.
  • Home location information such as home A-RACF address, home SPDF address, etc.
  • visit information such as the user's care-of address, visit A-RACF address, visit SPDF address, etc.
  • the shortest match and hash (HASH) methods can be used to reduce the memory requirements of the IP lookup table and improve the search speed.
  • the shortest match and the HASH method belong to the prior art, and are not described here.
  • FIG. 3 is a schematic diagram of a system according to Embodiment 1 of the present invention.
  • SPDF is connected to two access networks, and is respectively connected to A-RACF1 and A-RACF2, and it is assumed that the user accesses the network through the home network. Access the network, and pre-configure the available SPDF addresses such as domain name or IP address correspondence and communication negotiation parameters such as keys in NASS1.
  • FIG. 4 is a schematic structural diagram of an SPDF according to Embodiment 1 of the present invention, which is a specific implementation manner of a central policy decision function entity provided by the present invention, and can be applied to the system shown in FIG. 3.
  • the SPDF includes: an A-RACF interface unit and a correspondence establishing unit.
  • the A-RACF interface unit is configured to receive the user routing information sent by the A-RACF, provide the corresponding relationship establishing unit, and negotiate with the A-RACF to obtain the A-RACF information, and provide the corresponding information.
  • Relationship building unit Correspondence relationship establishment And a unit, configured to establish a correspondence between the user and the A-RACF according to the user routing information received by the A-RACF interface unit and the A-RACF information.
  • FIG. 5 is a flowchart of Embodiment 1 of the present invention. Referring to FIG. 3 and FIG. 4, the following steps are included: Step 500: A user accesses a network through NASS1.
  • the user successfully connects to the network, such as successfully completing the authentication, and the user's IP address is successfully assigned.
  • the specific implementation is related to the prior art.
  • Step 501 ?? Step 502 NASS1 sends the user information carrying the user IP address, SPDF address and communication negotiation parameters to A-RACF1, and A-RACF1 returns a response to NASS1.
  • Step 503 A-RACF1 performs communication link negotiation with the SPDF corresponding to the SPDF address to establish a communication link.
  • the communication link negotiation is performed between the A-RACF1 and the SPDF by using the communication negotiation parameters in the user information from the NASS1.
  • the SPDF learns the information of the A-RACF1, such as the A-RACF1 address.
  • Step 504 A-RACF1 sends the user routing information carrying the user IP address to the SPDF through the established communication link.
  • Step 505 The SPDF establishes a correspondence between the user IP address and the A-RACF1 address according to the received user routing information and the A-RACF1 address obtained in the communication link negotiation.
  • the SPDF can find the A-RACF1 to which the SPDF belongs according to the correspondence between the user IP address and the A-RACF1 address that has been established, thereby realizing the SPDF and the A-RACF1. Topology automatically discovers.
  • a Home Agent is a router on a home network, and can act as a mobile node.
  • the anchor point for communication can also send the packet data to the mobile node that is roaming through the tunnel.
  • the Visiting Agent is a router that visits a connection point acting as a mobile node in the network, and the FA can forward the packet data sent by the HA to the mobile node.
  • a mobile node is a terminal device capable of network roaming.
  • the home A-RACF and the visited A-RACF are connected to the same SPDF, and the connection between the home NASS and the visited NASS. It is assumed that the correspondence between available SPDF addresses such as domain names or IP addresses, and home communication negotiation parameters and visited communication negotiation parameters are pre-configured in the home NASS and the roaming NASS, respectively.
  • the home network has completed the network access of the user in the home network according to the flow shown in FIG. 4, that is, the user IP address and the attribution have been established in the SPDF. Correspondence between A-RACF addresses.
  • FIG. 7 is a flowchart of Embodiment 2 of the present invention.
  • the method includes the following steps: Step 700: A user accesses a network by visiting a NASS.
  • the user obtains the care-of address of the user in the visited network.
  • the care-of address is the location information of the user currently in the visited network.
  • the method for obtaining the care-of address can be referred to the related protocol and has nothing to do with the method of the present invention, and details are not described herein again.
  • Step 701 Visiting the NASS to obtain the home information of the user including the user IP address from the home NASS.
  • the interaction between the visited NASS and the home NASS belongs to the prior art, and the specific implementation can be referred to the related protocol.
  • Step 702 ?? Step 703 Visiting NASS sends the user information carrying the user IP address, the care-of address, the SPDF address, and the visited communication negotiation parameters to the visited A-RACF, and visits the A-RACF to return a response to the visited NASS.
  • Step 704 Visiting the A-RACF and the SPDF corresponding to the SPDF address to perform communication link negotiation and establishing a communication link.
  • the communication communication negotiation parameter in the information is used for communication link negotiation.
  • the SPDF learns the information of the visited A-RACF, such as the visited A-RACF address.
  • Step 705 Visiting the A-RACF to send the user routing information carrying the user IP address and the care-of address to the SPDF through the established communication link.
  • Step 706 The SPDF establishes a correspondence between the user IP address, the care-of address, and the visited A-RACF address according to the received user routing information and the visited A-RACF address obtained in the communication link negotiation.
  • the SPDF can find the visited A-RACF according to the correspondence between the user IP address, the care-of address and the visited A-RACF address established by itself, and when the AF is directed to the SPDF,
  • the SPDF may search for a correspondence between the user IP address established by the user, the care-of address and the visited A-RACF address, and the correspondence between the user IP address and the home A-RACF address. Go to the home A-RACF and visit the A-RACF to achieve topology auto-discovery of SPDF and visit/attribute A-RACF.
  • FIG. 8 is a schematic diagram of a system according to Embodiment 3 of the present invention.
  • the home A-RACF and the visited A-RACF are respectively connected to the home SPDF and the visited SPDF in the respective networks, and the connection between the home SPDF and the visited SPDF is attributed.
  • the connection between NASS and visiting NASS It is assumed that the corresponding relationship between the available home SPDF address, such as a domain name or an IP address, and the parameters of the home communication negotiation parameter, such as a key, are pre-configured in the home NASS; the corresponding visited SPDF address such as the domain name or the IP address is pre-configured in the visited NASS. Relationships, as well as visiting parameters such as communication negotiation parameters such as keys.
  • FIG. 9 is a flowchart of Embodiment 3 of the present invention. Referring to FIG. 9, the following steps are included: Step 900: A user accesses a network by visiting a NASS.
  • the user obtains the care-of address of the user in the visited network.
  • Step 901 The visited NASS obtains the home subscriber information including the user IP address and the home SPDF address from the home NASS.
  • the interaction between the visited NASS and the home NASS belongs to the prior art. For the specific implementation, refer to the related protocol. The difference is that the home subscriber information also includes the home SPDF address.
  • Step 902 ⁇ Step 903: Visiting NASS sends the user information carrying the user IP address, the care-of address, the home SPDF address, the visited SPDF address, and the visited communication negotiation parameters to the visited A-RACF, and visits the A-RACF to return a response to the visited NASS.
  • Step 904 Visiting the A-RACF and visiting the SPDF to negotiate a communication link and establish a communication link.
  • visit A-RACF and visit SPDF use the communication communication negotiation parameters from the user information of the visited NASS to conduct communication link negotiation, and visit the SPDF to learn the information of the visited A-RACF through the communication link negotiation process.
  • A-RACF address, etc. There are many ways to implement negotiation, which are prior art and will not be described in detail here.
  • Step 905 Visiting the A-RACF to send the user routing information carrying the user IP address, the care-of address, and the home SPDF address to the visited SPDF through the established communication link.
  • Step 906 Visiting SPDF establishes a correspondence between the user IP address, the care-of address, and the visited A-RACF address and the home SPDF address according to the received user routing information and the visited A-RACF address obtained in the communication link negotiation.
  • Steps 907 to 908 The communication link negotiation between the SPDF and the home SPDF is performed, and the user who carries the user IP address, the care-of address, and the visited A-RACF address is sent to the home SPDF through the communication link established after the negotiation. Routing information. Through the communication link negotiation process, the home SPDF is informed of the information such as the SPDF address.
  • the home SPDF can find a visit to the SPDF and visit based on the correspondence between the user IP address, the care-of address, the visited A-RACF address, and the visited SPDF address.
  • the home SPDF is based on the correspondence between the user IP address established by itself and the home A-RACF address, and the user IP address, the care-of address, and the visited A-RACF address. Correspond to the visit to the SPDF address, find the home A-RACF and visit the SPDF, and then visit the A-RACF by visiting the SPDF to achieve attribution. Visit SPDF and attribution/visit
  • the NASS accesses the network.
  • the visited NASS authenticates the user through the home NASS, obtains the profile and the visited/home SPDF address, and then visits the NASS to directly allocate the user to the user. IP address;
  • Visit NASS chooses to use SPDF or home SPDF according to the agreement with the home NASS operator, and then sends the user's profile and SPDF address to visit A-RACF. If the home SPDF is the same as the visited SPDF, there is no need to choose.
  • visit A-RACF to negotiate with the visited/home SPDF and establish a communication link; visit the user IP address, attribution/visit SPDF address of the user who visited the visited/home SPDF through the established communication link through the established communication link. And user routing information such as user information of the home/visit communication negotiation parameter;
  • visit/home SPDF establishes the user based on the received user routing information.
  • the visited/home SPDF can find the visited A-RACF according to the correspondence between the household IP address and the visited A-RACF address, thereby implementing SPDF and A-RACF.
  • the topology is automatically discovered.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Computer Hardware Design (AREA)
  • Computing Systems (AREA)
  • General Engineering & Computer Science (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

L'invention concerne un procédé d'accès au réseau, selon lequel la fonction de décision de politique centrale établit une relation entre l'utilisateur et la fonction de politique d'accès ou de distribution associée d'après les informations de routage de l'utilisateur transmises par la fonction de politique d'accès ou de distribution et les informations de la fonction de politique d'accès ou de distribution. L'invention concerne également un système d'accès au réseau. Lors du processus d'accès au réseau par l'utilisateur, la relation entre l'utilisateur et la fonction A-RACF du réseau actuel dans lequel il demeure est établie dynamiquement dans la fonction SPDF, c'est-à-dire que la relation topologique entre la fonction SPDF et la fonction A-RACF est établie dynamiquement. Ainsi, lorsque l'AF envoie une demande de ressources à la fonction SPDF, cette dernière peut trouver la fonction A-RACF à laquelle la SPDF appartient d'après la relation entre l'utilisateur et la fonction A-RACF, de sorte que la découverte de topologie automatique entre les fonctions SPDF et A-RACF peut être mise en oeuvre et l'accès au réseau utilisateur normal peut être assuré.
PCT/CN2007/070658 2006-09-07 2007-09-07 Procédé, système et dispositif d'accès au réseau Ceased WO2008040212A1 (fr)

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CN200610126866.2 2006-09-07
CN200610126866A CN100579070C (zh) 2006-09-07 2006-09-07 一种实现网络接入的方法及系统

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CN101141379A (zh) 2008-03-12

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