CN1972321A - An acquisition method and system for configuration information of home network related to IPv6 address - Google Patents

Abstract

The invention discloses a method for acquiring IPv6 address-related home network configuration information. Including: A. The access service network gateway sends an access authentication request message to the authentication authentication and accounting server according to the terminal request, and the access authentication request message carries the terminal identifier; B. Authentication authentication and accounting The server obtains the home network configuration information related to the IPv6 address according to the terminal identifier, and sends it to the access service network gateway; C. The access service network gateway sends the home network configuration information related to the IPv6 address to the terminal. The invention also discloses a system for obtaining configuration information of the home network related to the IPv6 address. The scheme of the invention provides a scheme for obtaining configuration information of the home network related to the IPv6 address in the WiMAX network, which can facilitate users to obtain the configuration information of the home network related to the IPv6 address.

Description

A method and system for obtaining IPv6 address-related home network configuration information

technical field

The invention relates to the communication field, in particular to a method and a system for acquiring IPv6 address-related home network configuration information.

Background technique

WiMAX (Worldwide Interoperability for Microwave Access), the Chinese full name is global access microwave interoperability, is a wireless metropolitan area network technology based on the IEEE 802.16 standard. The WiMAX network is mainly composed of three parts: client (MSS/SS), access service network (ASN) (including base station (BS Base Station) and access service network gateway (ASN GW ASN Gateway)), and connection service network (CSN Connectivity Service Network) (including prepaid server (PPSPrepaid Server), authentication authentication and accounting server (AAA Server Authentication, Authorization and Accounting Server)) and other logical entities. The wireless side of the WiMAX network is a wireless metropolitan area network access technology based on the IEEE 802.16d/e standard. Now it mainly follows the IEEE 802.16-2004 (802.16d) standard formulated in July 2004. IEEE 802.16-2004 (802.16d) standard working frequency band is 2GHz to 11GHz, which is a mixed frequency band of licensed and unlicensed. Using the physical layer of OFDM Orthogonal Frequency Division Multiplexing and Orthogonal Frequency Division Multiplex Access (OFDMA, Orthogonal Frequency Division Multiplex Access), it can effectively resist multipath fading. In the case of optimal channel fading, the transmission rate can approach 75Mbps. The IEEE802.16-2004 (802.16d) standard is used for the non-line-of-sight point-to-multipoint technology in the metropolitan area network, mainly in the form of fixed and nomadic networks. The IEEE 802.16e under discussion will add support for simple mobile communications. technology.

As shown in Figure 1, SS/MSS (Subscriber Station/Mobile Subscriber Station) represents a WiMAX terminal, which is connected to the ASN in a wireless manner.

The role of ASN mainly includes the following aspects:

Ensure the establishment of Layer 2 connections between WiMAX terminals and WiMAX base stations;

radio resource management;

Network discovery and the best choice for WiMAX user network service providers;

In the proxy mobile IP mode, act as a proxy server to control WiMAX user authentication and billing messages;

Provide relay for the establishment of WiMAX terminal layer 3 application connection;

The role of CSN mainly includes the following aspects:

Assign IP addresses to WiMAX user sessions;

provide Internet access;

Act as an authentication authentication and accounting proxy server or an authentication authentication and accounting server;

Policy and access control based on user subscription data;

Support the establishment of tunnels between ASN and CSN;

Support the generation of WiMAX user bills and the settlement of WiMAX services between operators;

Support the establishment of roaming tunnels between CSNs;

Support mobility between ASNs;

Support multiple WiMAX services, such as location-based services, end-to-end services, multimedia broadcast and multicast services, etc.;

IPv6 (Internet Protocol version 6) is the next version of the Internet protocol. It was originally proposed because with the rapid development of the Internet, the limited address space defined by IPv4 will be exhausted, and the lack of address space will definitely affect the further development of the Internet. develop. In order to expand the address space, it is planned to redefine the address space through IPv6. IPv4 adopts 32-bit address length, only about 4.3 billion addresses are estimated to be allocated between 2005 and 2010, while IPv6 adopts 128-bit address length, which can provide almost unlimited addresses. In addition to solving the address shortage problem once and for all in the design process of IPv6, other problems that cannot be solved well in IPv4 are also considered. The main advantages of IPv6 are reflected in the following aspects: expanding the address space, improving the overall throughput of the network, improving the quality of service (QoS), better security assurance, supporting plug and play and mobility, and better realizing multicast Function.

MIPv6 (Mobile Internet Protocol version 6) is Mobile IPv6, which is a mobile version protocol for IPv6. The main goal of moving IPv6 is to make the mobile node always address by the home address in the IPv6 network, no matter it is connected to the home network or moves to a foreign network. Mobile IPv6 is completely transparent to the protocol layer above the IP layer, which makes the application running on the node still available without modification or configuration when the mobile node moves between different subnets. As shown in Figure 2, it is the network communication architecture under the mobile IPv6 solution, where the network operation of the mobile IPv6 network is as follows:

The mobile node uses the IPv6 version of Router Discovery to determine its care-of address;

A mobile node acts like any fixed host and router when connected to its home network;

When the mobile node is connected to a foreign network, it uses the address auto-configuration method defined by IPv6 to obtain the care-of address on the foreign network;

The mobile node notifies the home agent of its care-of address;

If the security of the operation can be guaranteed, the mobile node also notifies the correspondent node of its care-of address;

The data packets sent by the correspondent node that does not know the care-of address of the mobile node are routed in the same way as in mobile IPv4, that is, they are first routed to the home network of the mobile node, and then the home agent tunnels them to the care-of address of the mobile node ;

The data packet sent by the communication node that knows the care-of address of the mobile node can be directly sent to the mobile node by using the IPv6 routing header, and the routing header uses the care-of address of the mobile node as an intermediate destination address;

In the opposite direction, data packets sent by mobile nodes are routed directly to their destinations using special mechanisms. However, when there is filtering in the ingress direction, the mobile node can send the data packet to the home agent through the tunnel, and the source address of the tunnel is the care-of address of the mobile node

The following are explanations of some terms commonly used in Mobile IPv6.

Mobile node: that is what we usually call a mobile terminal. When it is in the home network, the communication process is the same as that of the ordinary network.

The communication process is the same, but when it moves to a foreign network, the mobile IPv6 communication process is adopted.

Communication node: The communication node is a node that communicates with the mobile node, and its own address can be IPv4 or IPv6.

Home network: The network where the mobile node resides for a long time or when it opens an account and registers.

Home agent: Also called home agent, it is generally a router in the home network of the mobile node.

Home address: the IP address assigned by the mobile terminal in the home network.

Foreign network: the non-home network where the mobile node is after moving.

Care-of address: the temporary IP address allocated by the mobile node for communication in a foreign network.

Link-local address (link-local address: IPv6 stipulates that all network interfaces must have at least one link-local address, and its format is: FE80::/64 bit+network interface identifier/64bit.

As shown in Figure 3, it is a schematic flow chart of the principle of MIPv6 application in WiMAX networks in the prior art. The light-colored line in the figure indicates that special processing may be required (multiple methods can be used), but its processing method does not involve this The content described in the technical solution of the invention is not described here. For related content, please refer to [RFC 3775].

IPv6 address home network configuration information includes available DNS server list information or NTP server information, etc. This information is very important for terminals. Currently, there are two methods for assigning IPv6 address home network configuration information in IPv6 networks:

Stateful autoconfiguration and hybrid autoconfiguration.

But there are following problems in prior art:

1. There is no plan to explain how to obtain the home network configuration information related to the IPv6 address in the WiMAX network, and there is no implementation plan for the specific process, bearer cells, and messages;

2. Terminals in a WiMAX network can only obtain configuration information through the DHCPv6 protocol, which may include IPv6 address-related home network configuration information. This acquisition method is single and not flexible, which is not conducive to expansion.

Contents of the invention

The present invention provides a method for obtaining configuration information of a home network related to an IPv6 address, which is used to solve the problem in the prior art that a terminal cannot obtain the configuration information of a home network related to an IPv6 address.

The inventive method comprises:

A method for acquiring IPv6 address-related home network configuration information, comprising:

A. The access service network gateway sends an access authentication request message to the authentication authentication and accounting server according to the terminal request, and the access authentication request message carries the terminal identifier;

B. The authentication authentication and accounting server obtains the home network configuration information related to the IPv6 address according to the terminal identification, and sends it to the access service network gateway;

C. The access service network gateway sends the home network configuration information related to the IPv6 address to the terminal.

In the step A, the terminal identifier is the network access identifier of the terminal.

In the described step C, also include:

C1. The access service network gateway saves the home network configuration information related to the IPv6 address;

C2. The access service network gateway sends the home network configuration information related to the IPv6 address to the terminal according to the terminal request.

The step C1 also includes:

C11. The access service network gateway sends an access authentication success message to the terminal.

In the step B, the authentication authentication and accounting server sends an access request acceptance message to the access service network gateway, and the access request acceptance message carries the IPv6 address correlation Home network configuration information.

The home network configuration information related to the IPv6 address includes:

Domain name server information or network time protocol server information or default gateway information of the home network.

The authentication authorization and accounting server may be a home authentication authorization and accounting server, or a visiting authentication authorization and accounting server.

The inventive system includes:

A system for obtaining IPv6 address-related home network configuration information, including an access service network gateway and an authentication authentication and accounting server, and also includes:

A terminal identification identification unit, located in the authentication authentication and accounting server, for identifying the terminal identification;

The IPv6 address-related home network configuration information setting unit is located in the authentication and billing server, and is used to, in the first message sent to the access service network gateway, according to the identification result sent by the terminal identification identification unit Set the home network configuration information related to the IPv6 address.

The system also includes:

The storage unit is located at the access service network gateway, and is used to store the first message sent by the access authentication and authentication server, and send it to the terminal according to the terminal's request.

The technical scheme of the invention provides a new method for obtaining IPv6 address-related home network configuration information in a WiMAX network, which improves the flexibility of the system and facilitates expansion.

Description of drawings

FIG. 1 is a schematic diagram of a logical architecture of a WiMAX network in the prior art;

FIG. 2 is a schematic diagram of a mobile IPv6 network communication architecture in the prior art;

FIG. 3 is a schematic flow diagram of the principle of applying MIPv6 in a WiMAX network in the prior art;

Fig. 4 is a schematic flow chart of scheme one of the present invention;

Fig. 5 is a schematic flow diagram of the second scheme of the present invention;

FIG. 6 is a schematic diagram of a network structure of a system for obtaining IPv6 address-related home network configuration information according to the present invention.

Detailed ways

The specific implementation manners of the present invention will be described below in conjunction with the accompanying drawings.

A method of obtaining IPv6 address-related home network configuration information in the present invention is to send the IPv6 address-related home network configuration information directly to the terminal or to the ASN-GW through the authentication and authentication message in the WiMAX IPv6 network, and the terminal Either directly obtain it from the authentication message, or obtain it from the ASN-GW.

According to the above idea, there are two processes to obtain the home network configuration information related to the IPv6 address from the network side.

Option One:

IPv6 address-related home network configuration information is directly sent to the terminal at the completion of authentication and authentication. The related process is shown in Figure 4. It can be seen from the figure that it mainly includes the following steps:

S11. The terminal initiates an access authentication request.

The terminal initiates an access authentication request to the ASN-GW, and the ASN-GW is responsible for interacting with the access authentication on the network side.

S12. The ASN-GW sends an access request message Access-Request to the H-AAA server.

According to the access authentication request sent by the terminal, the ASN-GW sends an access request message Access-Request to the H-AAA server. The access request message Access-Request carries the identification information of the terminal. Here, the terminal The Network Access Identifier NAI.

S13. The H-AAA server finds the IPv6 address-related home network configuration information related to the terminal on the network side according to the network access identifier NAI.

According to the network access identifier NAI, the H-AAA server searches the home network configuration information related to the IPv6 address corresponding to the terminal on the network side, and the home network configuration information related to the IPv6 address may include the following content:

Including the domain name server (DNS Domain Name Server) information of the home network, the network time protocol server (NTP Network Time Protocol) information or the default gateway information, etc.

S14. The H-AAA server sends an access request acceptance message Access-Accept to the ASN-GW, and the message carries IPv6 address-related home network configuration information.

The H-AAA server responds to the ASN-GW with an access request acceptance message Access-Accept, which carries home network configuration information related to the IPv6 address of the corresponding terminal NAI.

S15. The ASN-GW sends an access authentication success message to the terminal, and the message carries IPv6 address-related home network configuration information.

The H-AAA server in the scheme can also use the V-AAA server according to the location of the user terminal.

After receiving the access request acceptance message Access-Accept, the ASN-GW sends an access authentication success message to the terminal, which carries home network configuration information related to the IPv6 address corresponding to the terminal NAI.

In the above scheme 1, after receiving the access request acceptance message Access-Accept sent by the H-AAA server, the ASN-GW directly transparently transmits the home network configuration information related to the IPv6 address of the corresponding terminal NAI, and transparently transmits it to terminal.

Option II:

The home network configuration information related to the IPv6 address is sent to the ASN-GW at the completion of authentication and authentication, and is stored by the ASN-GW. The terminal then obtains it from the ASN-GW using a DHCPv6 message, as shown in Figure 5, including the following steps:

S21. The terminal initiates an access authentication request.

The terminal initiates an access authentication request to the ASN-GW, and the ASN-GW is responsible for interacting with the access authentication on the network side.

S22. The ASN-GW sends an Access-Request message to the H-AAA server, which carries the NAI identifying the terminal.

S23. The H-AAA server finds the IPv6 address-related home network configuration information related to the terminal on the network side according to the network access identifier NAI.

S24. The H-AAA server responds to the ASN-GW with an Access-Accept message, which carries home network configuration information related to the IPv6 address of the corresponding terminal NAI.

S25. The ASN-GW saves the home network configuration information related to the IPv6 address of the corresponding terminal NAI.

Different from the direct transparent transmission of the IPv6 address-related home network configuration information in the first solution, in the second solution, the ASN-GW first reserves the IPv6 address-related home network configuration information, and does not directly send it to the terminal.

S26. The ASN-GW sends an access authentication success message to the terminal, notifying that the access authentication is successful.

S27. The terminal completes registration, establishment of a data channel, acquisition of a link-local address, and DAD detection according to the access authentication success message.

In step S27, the format of the link-local address is: FE80::/64 bit+InterfaceIdentifier (network interface identifier)/64bit, wherein FE::80 is a known local link prefix; interface identifier is It is 64 bits long and can be calculated based on the EUI-64 method. For example, we can calculate its 64-bit interface identifier based on the 48-bit MAC address of MSS. If the DAD detection is performed on this address, it is found that there is no conflict with any address on the local link, that is, the link-local address of the MSS is unique on the local link. Then it can be considered that the interface identifier of the MSS is also unique on the local link. There are known solutions for the specific generation algorithm of the Interface Identifier and how to perform DAD detection, so this article will not discuss it.

S28. The terminal sends an Information Request message to the ASN-GW, indicating that the home network configuration information related to the IPv6 address is requested.

In this step, the home network configuration information related to the IPv6 address is obtained through the active request of the terminal. After the terminal completes the registration, the establishment of the data channel, the acquisition of the link-local address and the DAD detection, it directly sends the Information Request to the ASN-GW message, requesting IPv6 address-related home network configuration information.

S29. The ASN-GW replies a response message Reply to the terminal, which carries the home network configuration information related to the IPv6 address requested by the terminal.

After receiving the Information Request message sent by the terminal, the ASN-GW replies to the terminal with a response message Reply, which carries the IPv6 address-related home network configuration information requested by the terminal.

In the above scheme 2, after receiving the access request acceptance message Access-Accept sent by the H-AAA server, the ASN-GW directly saves the home network configuration information related to the IPv6 address of the corresponding terminal NAI, and does not directly transparently transmit it to the terminal , after the terminal completes related operations such as registration, data channel establishment, link-local address acquisition and DAD detection, and then transmits it to the terminal according to the terminal request.

As shown in Figure 6, it is a schematic diagram of the system network structure of the present invention to obtain IPv6 address-related home network configuration information. In this network structure, it includes an access service network gateway and an access authentication authentication and accounting server, and also includes:

A terminal identification identification unit, located in the authentication authentication and accounting server, for identifying the terminal identification;

The IPv6 address-related home network configuration information setting unit is located in the authentication and billing server, and is used to, in the first message sent to the access service network gateway, according to the identification result sent by the terminal identification identification unit Set the home network configuration information related to the IPv6 address.

Further, the network structure may also include:

The storage unit is located at the access service network gateway, and is used to store the first message sent by the access authentication and accounting server, and send it to the terminal according to the terminal's request.

The technical scheme of the invention provides a new method for obtaining IPv6 address-related home network configuration information in a WiMAX network, which improves the flexibility of the system and facilitates expansion.

Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these modifications and variations.

Claims (9)

1. A method for obtaining IPv6 address-related home network configuration information, characterized in that: A. The access service network gateway sends an access authentication request message to the authentication authentication and accounting server according to the terminal request, and the access authentication request message carries the terminal identifier; B. The authentication authentication and accounting server obtains the home network configuration information related to the IPv6 address according to the terminal identification, and sends it to the access service network gateway; C. The access service network gateway sends the home network configuration information related to the IPv6 address to the terminal. 2. The method according to claim 1, wherein in the step A, the terminal identifier is a network access identifier of the terminal. 3. The method according to claim 1, characterized in that, in the step C, further comprising: C1. The access service network gateway saves the home network configuration information related to the IPv6 address; C2. The access service network gateway sends the home network configuration information related to the IPv6 address to the terminal according to the terminal request. 4. The method according to claim 3, characterized in that said step C1 further comprises: C11. The access service network gateway sends an access authentication success message to the terminal. 5. The method according to claim 1, characterized in that, in the step B, the authentication authentication and accounting server sends an access request acceptance message to the access service network gateway, and the The access request acceptance message carries the home network configuration information related to the IPv6 address. 6. The method according to claim 1, wherein said IPv6 address-related home network configuration information includes: Domain name server information or network time protocol server information or default gateway information of the home network. 7. The method according to claim 1, characterized in that said authentication, authorization and accounting server can be a home authentication, authorization and accounting server, or a visiting authentication, authorization and accounting server. 8. A system for obtaining IPv6 address-related home network configuration information, including an access service network gateway and an authentication and accounting server, characterized in that it also includes: A terminal identification identification unit, located in the authentication authentication and accounting server, for identifying the terminal identification; The IPv6 address-related home network configuration information setting unit is located in the authentication and billing server, and is used to, in the first message sent to the access service network gateway, according to the identification result sent by the terminal identification identification unit Set the home network configuration information related to the IPv6 address. 9. The system of claim 8, further comprising: The storage unit is located at the access service network gateway, and is used to store the first message sent by the access authentication and authentication server, and send it to the terminal according to the terminal's request.