WO2007022697A1

WO2007022697A1 - A METHOD FOR COMMUNICATING BETWEEN THE IPv6 COMMUNICATION PARTNER AND THE MOBILE IPv6 NODE AS WELL AS THE COMMUNICATION PARTNER AGENT GATEWAY

Info

Publication number: WO2007022697A1
Application number: PCT/CN2006/002078
Authority: WO
Inventors: Ru Liang
Original assignee: Huawei Technologies Co., Ltd.
Priority date: 2005-08-24
Filing date: 2006-08-16
Publication date: 2007-03-01
Also published as: JP2008541516A; CN1870819A; CN101160927B; CN101160927A

Abstract

A method for communicating between the IPv6 communication partner and the mobile IPv6 node includes: when the mobile IPv6 node communicates with the IPv6 communication partner using the routing optimization manner, the communication partner agent gateway processes the transinformation between the mobile IPv6 node and the IPv6 communication partner instead of said IPv6 communication partner. By the present invention, not only implementing the mobile IPv6 communication highly efficiency, but also enabling to complete the extension process of the routing optimization for much communication partners by the few gateway agents, therefore enabling much type terminals to implement the communication between the general IPv6 communication partner and the mobile IPv6 node using the routing optimization of the mobile IPv6 without providing the special support for the mobile IPv6, thus it may lower the upgrade cost, while it also reduce the complexity for implementing the IPv6 communication partner, easy to deploy for the mobile IPv6 application. Also, the invention provides a communication partner agent gateway.

Description

TECHNICAL FIELD The present invention relates to the field of communications, and in particular, to a method for communicating IPv6 communication partners and mobile IPv6 nodes, and a communication partner proxy gateway.

Background technique

With the development of network technology and the emergence of a large number of mobile terminals, such as laptops, personal digital assistants (PDAs), mobile phones, in-vehicle devices, etc., the mobile computing boom has been launched, and more and more users can pass each A variety of terminals, connected to the Internet (Internet) through a public mobile wireless network at any location.

To address the needs of mobile services, Mobile IP (Mobile IP) technology was introduced at the network level.

The basic principle of Mobile IP technology is to enable the mobile node to use the initial IP (Internet Protocol) address for IP communication during the mobile process, so as to ensure that the upper layer applications carried by the IP network layer remain uninterrupted and splicable in the mobile. Sex.

With the expansion of the network scale, IPv6 technology will gradually replace the current IPv4 technology with its huge address space. Mobile IPv6-based Mobile IP, Mobile IPv6 technology, is becoming more and more popular in the Mobile IP field with the help of IPv6's own technical advantages and improvements to Mobile IPv4 technology.

The basic principles of Mobile IPv6 technology are described below in conjunction with Figure 1:

1 When mobile node 111 is connected to its home network 110, it will work in the same way as other fixed nodes.

2 The mobile node 111 detects whether it has roamed to the foreign network through the IPv6 neighbor discovery mechanism: The IPv6 gateway periodically sends a router advertisement message, which includes the prefix of the network, and after the mobile node 111 receives the router advertisement message of the gateway, If the prefix of the network is checked to be different from the prefix of the home network, it is considered to have roamed to the foreign network.

3 If the mobile node 111 finds that it has moved to the foreign network 120, it will automatically configure the process through a stateful or stateless address based on the received router announcement information. The care-of address on the foreign network 120 is obtained. At this time, the mobile node 111 has both the home address and the care-of address.

4 The mobile node 111 registers its care-of address with the "Binding Update" message to the home agent 113.

© Mobile node 111 can also notify this communication partner of its care-of address via the "Binding Update" message registration. Before registration, the Return Routability detection process needs to be performed between the mobile node 111 and the communication partner 130, that is, the mobile node 111 first sends a Home Init Test message and a Cai'e-of Init Test (transfer). The test initialization message is sent to the communication partner 130, and after the communication partner 130 processes, returns a Home Test message and a Care-of Test message to the mobile node.

6 If the communication partner 130 of the mobile node 111 does not know its care-of address, the data message will be sent to the home network 110 of the mobile node 111 according to the home address of the mobile node 111, and then the home agent 113 will intercept the datagram. Then, according to the current care-of address of the mobile node 111, the data message is forwarded to the mobile node 111 by using a tunnel mechanism.

The message sent by the mobile node 111 to the communication partner 130 is also sent to the home agent 113 through the reverse tunnel, and then forwarded to the communication partner 130 by the home agent 113.

Because in this way, the data message between the communication partner 130 and the mobile node 111 is transited by the home agent 130, so it is called a "triangular routing" mode.

7 If the communication partner 130 knows the care-of address of the mobile node 111 through the "binding update", the data message is directly transmitted to the mobile node 111 by using the IPv6 routing extension header. Since the first destination address of the data packet is the care-of address and the second destination address is the home address, the data packet is directly sent to the mobile node 111 in the foreign network 120 without being transited by the home agent 113.

In the opposite direction, the source address of the data message sent by the mobile node 111 to the communication partner 130 is the care-of address, and the home address is stored in the destination extension header of the data message. In this way, the data message can also be sent to the home agent 113 without a reverse tunnel, but directly to the communication partner 130.

In this way, the "triangular routing" method corresponding to 6 is called the "route optimization" mode. In the prior art, when a communication between a mobile IPv6 node and an IPv6 communication partner is implemented by means of "triangular routing", communication data packets between all mobile nodes and communication partners are required. The transfer of home agents makes the home agent easy to become a bottleneck, which also leads to increased network traffic and reduced network efficiency.

When the "route optimization" mode is adopted in the prior art to implement communication between the mobile IPv6 node and the IPv6 communication partner, the data message can be directly sent to the mobile node in the foreign network according to the care-of address, without the need to transit through the home agent. Therefore, the efficiency of mobile IPv6 communication can be improved. However, communication partners are required to process mobile IPv6 messages such as "binding updates", participate in the Return Routability detection process, and also handle special IPv6 extension headers. Therefore, for communication partners in the "route optimization" mode, it is required to be in ordinary IPv6. Extend the upgrade based on the node.

The prior art Mobile IPv6 technology can solve the mobile communication problem between the mobile IPv6 node and the ordinary IPv6 communication partner, but there are some problems: In the "triangular routing" mode, any ordinary IPv6 communication partner does not need to perform any expansion, It can communicate with mobile IPv6 nodes without any sense, but this scheme has efficiency problems; while the "route optimization" mode, although the communication efficiency is high, it must be extended to the ordinary IPv6 communication partners to support Mobile IPv6 technology, thus requiring the network. The various IPv6 devices existed in the network, especially the host nodes, including a large number of IPv6 terminals, all of which support Mobile IPv6 extension and upgrade, which will result in high application cost, thus limiting the mobile IPv6 "route optimization" mode to some extent. Applications.

Summary of the invention

The invention provides a method for communication between an IPv6 communication partner and a mobile IPv6 node and a communication partner proxy gateway, which can implement communication between a common IPv6 communication partner and a mobile IPv6 node in a route optimization manner of mobile IPv6, thereby reducing the upgrade cost and simultaneously It also reduces the complexity of IPv6 communication partner implementation and facilitates the deployment of mobile IPv6 applications.

According to one aspect of the present invention, a method for communicating between an IPv6 communication partner and a mobile IPv6 node includes:

When the mobile IPv6 node communicates with the IPv6 communication partner by using a route optimization manner, the communication partner proxy gateway proxyes the IPv6 communication partner to process the interaction information between the mobile IPv6 node and the IPv6 communication partner.

Optionally, the communication partner proxy gateway includes:

Setting a default gateway device in the communication link when the mobile IPv6 node interacts with the IPv6 communication partner, and setting the information exchange between the mobile IPv6 node and the IPv6 communication partner. A designated gateway device within the communication link, a key gateway device disposed at the gateway between the networks, or a designated gateway device disposed at the gateway between the networks.

Optionally, before the communication partner proxy gateway proxyes the interaction information between the mobile IPv6 node and the IPv6 communication partner by the IPv6 communication partner, the method further includes:

The communication partner proxy gateway determines, according to the in-link IPv6 neighbor information it maintains, the interaction between the mobile IPv6 node and the IPv6 communication partner for the IPv6 communication partner agent.

The communication partner proxy gateway determines, by using the routing information, that the interaction information between the mobile IPv6 node and the IPv6 communication partner can be processed for the IPv6 communication partner agent;

Or,

The communication partner proxy gateway determines through the configuration information thereon that the interaction information between the mobile IPv6 node and the IPv6 communication partner can be handled for the IPv6 communication partner.

Optionally, the mobile IPv6 node communicating with the IPv6 communication partner by using a route optimization manner includes: sending, after the mobile IPv6 node registers the obtained care-of address to the IPv6 communication partner, the mobile IPv6 node sends a Home Test Init message. Representing his hometown agent and sending it to the IPv6 communication partner through the home agent; and,

Send a Care-of Test Init message to an IPv6 communication partner;

The communication partner proxy gateway is configured to process the interaction information between the mobile IPv6 node and the IPv6 communication partner by the IPv6 communication partner, and specifically includes:

The communication partner proxy gateway intercepts the message sent to the IPv6 communication partner and proxies the IPv6 communication partner to process the intercepted message.

Optionally, the process of processing, by the proxy, the intercepted message by the proxy by the IPv6 communication partner includes:

The communication partner proxy gateway detects the mobile IPv6 node according to the intercepted message;

After the detection is passed, the communication partner proxy gateway proxyes the IPv6 communication partner to maintain information required during the detection process, and responds to the home agent of the mobile IPv6 node with a Home Test message, which is forwarded by the home agent to the Mobile IPv6 node; and, Responding to the Mobile-IPv6 node with a Care-of Test message.

Optionally, the method further includes:

After the mobile IPv6 node receives the Home Test message and the Care-of Test message that the communication partner proxy gateway responds, the detection process ends.

Optionally, the mobile IPv6 node communicating with the IPv6 communication partner by using a route optimization manner includes: when the mobile IPv6 node registers the obtained care-of address with an IPv6 communication partner, the mobile IPv6 node sends a binding update message. For IPv6 communication partners;

The communication partner proxy gateway intercepts the binding update message;

And proxying the IPv6 communication partner to process the binding update message.

Optionally, the process of processing, by the proxy, the IPv6 communication partner, the binding update message includes:

The communication partner proxy gateway performs legality verification on the intercepted binding update message according to the information maintained in the detection process;

After the verification is passed, the home address and the care-of address of the mobile IPv6 node in the binding update message are recorded in the binding cache, and the binding confirmation message is sent to the mobile IPv6 node.

Optionally, the mobile IPv6 node communicating with the IPv6 communication partner by using a route optimization manner includes: after the mobile IPv6 node registers the obtained care-of address with the IPv6 communication partner, the mobile IPv6 node sends by using a route optimization manner The IPv6 data packet is sent to the IPv6 communication partner; the destination address in the IPv6 data packet is an IPv6 address corresponding to the IPv6 communication partner, and the source address is a care-of address of the mobile IPv6 node;

The communication partner proxy gateway intercepts the IPv6 data packet sent by the mobile IPv6 node, and processes the IPv6 data packet;

And sending the processed IPv6 data packet to a corresponding IPv6 communication partner.

Optionally, the process of processing the IPv6 data packet includes:

The communication partner proxy gateway is in the binding cache according to the care-of address of the mobile IPv6 node Find and get the corresponding home address in the message;

The home address of the data packet is replaced with a care-of address in the source address of the data packet; and the destination address extension header of the IPv6 data packet is discarded.

Optionally, the mobile IPv6 node communicates with the IPv6 communication partner by using a route optimization manner, and further includes:

The IPv6 communication partner returns an IPv6 data packet to the mobile IPv6 node, and the destination address of the returned IPv6 data packet is an IPv6 home address corresponding to the IPv6 source address in the data packet received by the IPv6 communication partner;

The communication partner proxy gateway is configured to process the interaction information between the mobile IPv6 node and the IPv6 communication partner by the IPv6 communication partner, and further includes:

The communication partner proxy gateway intercepts the IPv6 data packet returned by the IPv6 communication partner, and processes the IPv6 data packet returned by the IPv6 communication partner;

The communication partner IPv6 proxy gateway to the data processing ¹ ^ Gen sending to the mobile IPv6 node.

Optionally, the processing, where the IPv6 data packet returned by the IPv6 communication partner is processed, specifically includes:

The communication partner proxy gateway searches for a corresponding care-of address in the corresponding binding cache of the mobile IPv6 node according to the destination address of the home address in the data packet, and replaces the datagram when the transfer destination is confirmed. Destination address in the text;

Generating the processed data packet to generate a new IPv6 routing extension header, and storing the IPv6 home address therein.

Optionally, the communication partner proxy gateway sends the processed IPv6 data packet to the mobile IPv6 node, specifically:

Transmitting, by the communication partner proxy gateway, the converted data packet to the mobile IPv6 node according to the IPv6 care-of address;

The mobile IPv6 node communicates with the IPv6 communication partner by using a route optimization method, and further includes:

Receiving, by the mobile IPv6 node, a data packet sent by the communication partner proxy gateway, and replacing the IPv6 care-of address with the IPv6 home address; And uploading the data packet to the application layer according to the IPv6 home address, and completing the receiving process of the data packet.

According to another aspect of the present invention, a communication partner proxy gateway includes:

The interaction information obtaining unit is configured to obtain interaction information when the mobile IPv6 node communicates with the IPv6 communication partner by using a route optimization manner;

The interaction information processing unit is configured to proxy the interaction information between the mobile IPv6 node and the IPv6 communication partner by the IPv6 communication partner.

Optionally, the gateway further includes:

a capability determining unit, configured to determine, according to intra-link IPv6 neighbor information, or routing information maintained by the communication partner proxy gateway, or configuration information on the communication partner proxy gateway, whether the IPv6 communication partner agent can process the Interaction information between a mobile IPv6 node and an IPv6 communication partner.

Optionally, the interaction information obtaining unit includes: a detection message intercepting unit, configured to intercept a Home Test Init message sent by the mobile IPv6 node and forwarded to the IPv6 communication partner via the home agent, and the mobile IPv6 node sends the message to the IPv6 node The interaction information processing unit of the communication partner includes: a detection message processing unit, configured to detect the mobile IPv6 node according to the intercepted message; and proxy the IPv6 after the detection is passed The communication partner maintains information required during the detection process and responds to the Home Test message to the home agent of the mobile IPv6 node; and responds to the Mobile IPv6 node with a Care-of Test message.

Optionally, the interaction information acquiring unit includes: a binding update message intercepting unit, configured to intercept a binding update message sent by the mobile IPv6 node to an IPv6 communication partner;

The interaction information processing unit includes: a binding update message processing unit, configured to perform legality verification on the binding update message after the column is cut according to the information maintained in the detection process; and after the verification is passed, in the binding cache Recording a home address and a care-of address of the mobile IPv6 node in the binding update message, and responding to the mobile IPv6 node with a binding acknowledgement message.

Optionally, the interaction information acquiring unit includes: a first data packet intercepting unit, configured to intercept an IPv6 data packet sent by the mobile IPv6 node to the IPv6 communication partner by using a route optimization manner; and the IPv6 data packet The destination address is the IPv6 address corresponding to the IPv6 communication partner. The address is the care-of address of the mobile IPv6 node;

The interaction information processing unit includes: a first data packet processing unit, configured to search for and obtain a corresponding home address in the binding cache information according to the care-of address of the mobile IPv6 node; and replace the searched home address with the data The care-of address in the source address of the packet; the destination address extension header of the IPv6 data packet is discarded and forwarded to the IPv6 communication partner.

Optionally, the interaction information obtaining unit further includes: a second data packet intercepting unit, configured to intercept an IPv6 data packet returned by the IPv6 communication partner to the mobile IPv6 node, and the returned IPv6 datagram The destination address of the text is an IPv6 home address corresponding to the IPv6 source address in the data packet received by the IPv6 communication partner;

The interaction information processing unit further includes: a second data packet processing unit, configured to search for a corresponding care-of address in a corresponding binding cache of the mobile IPv6 node according to the destination address of the home address in the data packet, when the confirmation is performed When the care-of address is obtained, the destination address in the data packet is replaced by the destination address; the processed data packet is used to generate a new IPv6 routing extension header, and the IPv6 home address is stored therein; according to the IPv6 The care-of address transmits the converted data message to the mobile IPv6 node.

Optionally, the communication partner proxy gateway is configured to set a default gateway device in a communication link when the mobile IPv6 node performs information interaction with the IPv6 communication partner, and set a communication when the mobile IPv6 node performs information interaction with the IPv6 communication partner. A specified gateway device in the link, a key gateway device set in the gateway between the networks, or a designated gateway device set in the gateway between the networks.

In the technical solution provided by the present invention, when the mobile IPv6 node communicates with the IPv6 communication partner by using a route optimization manner, the communication partner proxy gateway requests the IPv6 communication partner to process the interaction information between the mobile IPv6 node and the IPv6 communication partner. . The invention can not only realize high-efficiency mobile IPv6 communication, but also enable a large number of communication partners to perform extended processing of "route optimization", which is completed by a small number of gateway device agents, thus making a large number of terminal types, such as ordinary IPv6 communication partners, unnecessary By providing dedicated support for mobile IPv6, it is possible to implement common IPv6 communication partners to communicate with mobile IPv6 nodes in the mobile IPv6 route optimization mode, thereby reducing the upgrade cost and reducing the complexity of IPv6 communication partners. Deployment of mobile IPv6 applications.

DRAWINGS FIG. 1 is a schematic diagram of the basic principle of the existing Mobile IPv6 technology;

2 is a schematic diagram showing the principle of implementing communication between a mobile IPv6 node and an IPv6 communication partner by using a "route optimization" method of Mobile IPv6 according to an embodiment of the present invention;

3 is a flow chart of an embodiment of a method for communicating between a mobile IPv6 node and an IPv6 communication partner.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In order to implement communication between a mobile node and a normal communication partner in a route optimization mode, the present invention provides a method for implementing communication between a mobile IPv6 node and an IPv6 communication partner, the main idea of which is: due to Mobile IPv6, a communication partner It is necessary to participate in the special message processing of the "route optimization" mode and the special processing of the received and sent data messages. Therefore, the present invention introduces the role of a communication partner proxy gateway (called a CN proxy gateway) through which the IPv6 communication partner is represented. The special processing related to "route optimization" is completed, so that any communication partner without extension can communicate with the mobile IPv6 node in a "route optimization" manner.

The CN proxy gateway may be configured as a default gateway device in a communication link when the mobile IPv6 node interacts with the IPv6 communication partner, and in a communication link when the mobile IPv6 node interacts with the IPv6 communication partner. Specifies the gateway device, the key gateway device that is set to the gateway between the networks, or the designated gateway device that is set up and down between the networks.

Referring to FIG. 2, in the embodiment of the present invention, when the mobile IPv6 node 211 communicates with the IPv6 communication partner 231 by using a route optimization manner, the communication partner proxy gateway 221 represents the IPv6 communication partner 231 to the mobile IPv6 node 211 and The interaction information between the IPv6 communication partners 231 is processed.

Prior to implementing the present invention, the mobile IPv6 node 211 is connected to its home network 210 and obtains its home address through information exchange with the home network 210;

The mobile IPv6 node 211 detects whether it has roamed to the foreign network 220 through the IPv6 neighbor discovery mechanism, and obtains the care-of address of the foreign network 220 through the address configuration process when it finds that it has moved to the foreign network 220.

According to a first embodiment of the present invention, when a mobile IPv6 node communicates with an IPv6 communication partner by using a route optimization manner, the interaction information passes through the communication partner proxy gateway, and the communication partner proxy gateway needs to determine that it can be processed by the IPv6 communication partner proxy. Mobile IPv6 node and IPv6 pass The interaction information between the partners includes specific methods including but not limited to the following methods:

The communication partner proxy gateway determines, according to the intra-link IPv6 neighbor information it maintains, whether the interaction message between the mobile IPv6 node and the IPv6 communication partner can be processed for the communication partner agent, or the communication partner proxy gateway determines whether the The communication partner agent processes the interaction information between the mobile IPv6 node and the IPv6 communication partner;

Alternatively, the communication partner proxy gateway determines, via the configuration information thereon, whether the interaction information between the mobile IPv6 node and the IPv6 communication partner can be handled for the communication partner agent.

The implementation flow of the implementation method of the communication method of the present invention is as shown in FIG. 3, including: Step 1: The mobile IPv6 node registers the obtained care-of address with the binding update message to the home agent.

In the "route optimization" mode, the mobile IPv6 node also attempts to register with the communication partner. Before registering with the communication partner, the mobile IPv6 node initiates a Return Routability detection process to the IPv6 communication partner. The specific implementation process includes:

Step 2: The mobile IPv6 node sends a Home Test Init message to its home agent, and sends the message to the IPv6 communication partner through the home agent; and sends a Care-of Test Init message to the IPv6 communication partner.

Step 3: The communication partner proxy gateway intercepts the message sent to the IPv6 communication partner, and proxyes the IPv6 communication partner to process the intercepted message. During this process, the IPv6 communication partner does not perceive all the processes of the communication partner proxy gateway proxy. The specific implementation process is as follows:

Step 1: The communication partner proxy gateway detects the mobile IPv6 node according to the intercepted message.

Step 2: After the detection is passed, the communication partner proxy gateway proxyes the IPv6 communication partner to maintain information required during the detection process, such as keygen token, nonce, etc., and responds to the Home Test message to the home agent of the mobile IPv6 node. Transmitting, by the home agent, the Home Test message to the mobile IPv6 node; and responding to the mobile IPv6 node with a Care-of Test message.

Step 4: When the mobile IPv6 node receives the response from the communication partner proxy gateway After the Home Test message and the Care-of Test message, record information such as keygen tokens and then end the detection process.

Step 5: After the detecting process ends, the mobile IPv6 node registers with the IPv6 communication partner by binding the update message.

The communication partner proxy gateway performs legality verification on the intercepted binding update message; after the verification is passed, records the home address, the care-of address, and the mobile IPv6 node's home address and the care-of address in the binding cache. Information such as time to live, and responding to the binding confirmation message to the mobile IPv6 node. The implementation process is as follows:

Step 1: The mobile IPv6 node sends a binding update message to the IPv6 communication partner.

Step 2: The communication partner proxy gateway intercepts the binding update message once it is confirmed as the communication partner proxy, and proxies the IPv6 communication partner to process the binding update message. Specifically include:

First, the communication partner proxy gateway performs legality verification on the intercepted binding update message according to the information maintained during the detection process.

After the verification is passed, the communication partner proxy gateway records information such as the home address and the care-of address of the mobile IPv6 node in the binding update message in the binding cache of the mobile IPv6 node, and responds to the binding confirmation to the mobile IPv6 node. Message.

When the mobile IPv6 node performs data packet interaction with the IPv6 communication partner, the specific implementation process includes:

Step 6: The mobile IPv6 node sends an IPv6 data packet to the IPv6 communication partner by using a route optimization mode.

The destination address of the IPv6 data packet is an IPv6 address corresponding to the IPv6 communication partner, and the source address is a care-of address of the mobile IPv6 node; the home address is carried in the destination address extension header of the data packet, and then the data packet does not pass through the hometown. Agent, and directly to the IPv6 communication partner.

Step 7: The communication partner proxy gateway intercepts the IPv6 data packet, and the

The IPv6 data is processed.

Since the destination address of the data packet is the IPv6 address of the communication partner, the data packet will be routed to the communication partner proxy gateway, and the IPv6 source address at this time is the care-of address. In the present invention, the communication partner proxy gateway, once confirmed as the communication partner proxy, first passes the communication partner maintained in step 5. The information of the binding cache is searched for the home address corresponding to the care-of address, and then the source address of the data transfer message for the care-of address is replaced with the home address that is found, and the destination address of the data packet is used by the communication partner proxy gateway. The extension header is discarded. The specific implementation process includes:

Step 1: The communication partner proxy gateway intercepts the IPv6 data packet sent by the mobile IPv6 node, and searches for and obtains the corresponding home address in the binding cache information according to the care-of address of the mobile IPv6 node.

Step 2: Replace the found home address with a care-of address in the source address of the data packet.

Step 3: Discard the destination address extension header of the IPv6 data packet.

Step 8: The communication partner proxy gateway sends the processed IPv6 data packet to the corresponding IPv6 communication partner. The IPv6 communication partner returns an IPv6 data packet to the mobile IPv6 node according to the IPv6 source address carried in the received data packet, and the returned destination address of the IPv6 data packet is the IPv6 hometown corresponding to the mobile node. address.

Step 9. The return data packet of the communication partner arrives at the communication partner proxy gateway. The communication partner proxy gateway searches for the corresponding record in the corresponding binding cache of the mobile IPv6 node according to the destination address of the data packet, that is, the home address, and if so, replaces the datagram with the care-of address corresponding to the home address. The destination address of the text, at the same time, the communication partner proxy gateway generates a new IPv6 route extension header for the converted data message, and saves the home address as the second destination address. The specific implementation process includes:

Step 1: The communication partner proxy gateway intercepts the IPv6 data packet, and according to the destination address of the home address in the data packet, finds whether there is a corresponding care-of address in the corresponding binding cache of the mobile IPv6 node, when it is confirmed that sometimes Then, the destination address in the data message is replaced by the care-of address.

Step 2: Generate a new IPv6 routing extension header by using the processed data packet, and save the IPv6 home address in the processed data packet.

Step 10: The communication partner proxy gateway sends the processed IPv6 data packet to the mobile IPv6 node for processing.

The first destination address of the processed data packet is the care-of address, which is directly sent to the mobile node in the foreign network, without the need to transit through the home agent. The mobile node receives the communication partner After the data packet is sent, the destination address is replaced with the second destination address, that is, the home address, and continues to be sent to itself to complete the processing of receiving the data packet. The specific implementation process includes:

Step 1: The communication partner proxy gateway sends the converted IPv6 data packet to the mobile IPv6 node according to the IPv6 care-of address;

Since the first destination address of the converted data packet is the care-of address, it is sent directly to the mobile IPv6 node in the foreign network without going through the home agent relay.

Step 2: The mobile IPv6 node receives the IPv6 data packet sent by the communication partner proxy gateway, and replaces the IPv6 care-of address with the IPv6 home address.

Step 3: The IPv6 data packet is uploaded to the application layer according to the IPv6 home address, and the data packet is received and processed.

In step 2 and step 3, after receiving the data packet sent by the communication partner, the mobile IPv6 node replaces the destination address with the second destination address, that is, the home address, and continues to send it to itself to complete the reception of the data packet. deal with.

In the foregoing embodiment, the communication partner proxy gateway needs to modify the data packet, such as modifying the source address and the destination address of the data packet, or discarding the destination address extension header of the data packet, so it may be necessary to modify the Payload in the data packet. Checksum. When modifying the checksum of Payload in the data message, you can fine tune the checksum according to the difference between the content before and after the modification, without having to recalculate.

In an embodiment of the invention, the communication partner proxy gateway includes:

An interaction information processing unit, configured to proxy, by the IPv6 communication partner, interaction information between the mobile IPv6 node and an IPv6 communication partner;

In an embodiment of the present invention, the interaction information acquiring unit includes: a detection message intercepting unit, a binding update message intercepting unit, a first data packet intercepting unit, and a second data packet intercepting unit. The interaction information processing unit includes: a detection message processing unit, a binding update message processing unit, a first data message processing unit, and a second data message processing unit.

Detecting a message intercepting unit, configured to intercept a Home Test Init message sent by the mobile IPv6 node and forwarded to the IPv6 communication partner via the home agent thereof, and a Care-of Test Init message sent by the mobile IPv6 node to the IPv6 communication partner;

a detection message processing unit, configured to detect, according to the message after the column is cut, the mobile IPv6 node; when the detection is passed, proxy the IPv6 communication partner to maintain information required during the detection process, and move to the mobile The home agent of the IPv6 node responds to the Home Test message; and responds to the Mobile IPv6 node with a Care-of Test message.

a binding update message bar intercepting unit, configured to intercept a binding update message sent by the mobile IPv6 node to an IPv6 communication partner;

a binding update message processing unit, configured to perform legality verification on the intercepted binding update message according to the information maintained in the detecting process; and after the verification is passed, record the binding update message in the binding cache The home address and the care-of address of the mobile IPv6 node are transmitted, and the binding confirmation message is sent to the mobile IPv6 node.

a first data packet intercepting unit, configured to intercept an IPv6 data packet sent by the mobile IPv6 node to the IPv6 communication partner by using a route optimization manner; the destination address of the IPv6 data packet is an IPv6 address corresponding to the IPv6 communication partner, and the source The address is a care-of address of the mobile IPv6 node; the first data packet processing unit is configured to search for and obtain a corresponding home address in the binding cache information according to the care-of address of the mobile IPv6 node; and replace the found home address The care-of address in the source address of the data packet; discarding the destination address extension header of the IPv6 data packet and forwarding the packet to the IPv6 communication partner.

a second data packet intercepting unit, configured to intercept an IPv6 data packet returned by the IPv6 communication partner to the mobile IPv6 node, where the returned destination address of the IPv6 data packet is a datagram received by the IPv6 communication partner The IPv6 home address corresponding to the IPv6 source address in the text;

a second data packet processing unit, configured to search for a corresponding care-of address in a corresponding binding cache of the mobile IPv6 node according to the destination address of the home address in the data packet, and when the transfer destination address is confirmed, Replacing the destination address in the data packet; generating a new IPv6 routing extension header for the processed data packet, and storing the IPv6 home address therein; And transmitting the converted data packet to the mobile IPv6 node according to the IPv6 care-of address. Based on the present invention, the communication partner proxy gateway may be a default gateway device disposed in a communication link when the mobile IPv6 node interacts with the IPv6 communication partner, and is configured to perform information interaction between the mobile IPv6 node and the IPv6 communication partner. A specified gateway device in the communication link, a key gateway device set in the gateway between the networks, or a designated gateway device set in the gateway between the networks.

It can be seen from the technical solution provided by the present invention that when the mobile IPv6 node communicates with the IPv6 communication partner by using the route optimization manner, the present invention is based on the communication partner proxy gateway proxying the IPv6 communication partner to communicate with the mobile IPv6 node and the IPv6 node. Interaction information between partners is processed. The invention can not only realize high-efficiency mobile IPv6 communication, but also enable a large number of communication partners to perform extended processing of "route optimization", which is completed by a small number of gateway device agents, thus making a large number of terminal types, such as ordinary IPv6 communication partners, unnecessary By providing dedicated support for mobile IPv6, it is possible to implement common IPv6 communication partners to communicate with mobile IPv6 nodes in the mobile IPv6 route optimization mode, thereby reducing the upgrade cost and reducing the complexity of IPv6 communication partners. Deployment of mobile IPv6 applications.

The above is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or within the technical scope disclosed by the present invention. Alternatives are intended to be covered by the scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

Rights request

A method for communicating between an IPv6 communication partner and a mobile IPv6 node, the method comprising: when a mobile IPv6 node communicates with an IPv6 communication partner by using a route optimization manner, the communication partner proxy gateway proxyes the IPv6 communication partner to The interaction information between the mobile IPv6 node and the IPv6 communication partner is processed.

2. The method according to claim 1, wherein the communication partner proxy gateway comprises:

Setting a default gateway device in a communication link when the mobile IPv6 node interacts with the IPv6 communication partner, setting a gateway device in the communication link when the mobile IPv6 node interacts with the IPv6 communication partner, and setting the network in the network A key gateway device between the gateways or a designated gateway device that is set up between the gateways.

The method according to claim 1, wherein before the communication partner proxy gateway agent processes the interaction information between the mobile IPv6 node and the IPv6 communication partner, the IPv6 communication partner further includes:

The communication partner proxy gateway determines that the interaction between the mobile IPv6 node and the IPv6 communication partner can be handled for the IPv6 communication partner agent according to the intra-link IPv6 neighbor information it maintains.

Or,

The method according to any one of claims 1 to 3, wherein the mobile IPv6 node communicates with the IPv6 communication partner by using a route optimization manner, including: when the mobile IPv6 node obtains the care-of address to the IPv6 Before the communication partner performs registration, the mobile IPv6 node sends a Home Test Init message to its home agent, and sends it to the IPv6 communication partner through the home agent;

Send a Care-of Test Init message to the IPv6 communication partner; The communication partner proxy gateway is configured to process the interaction information between the mobile IPv6 node and the IPv6 communication partner by the IPv6 communication partner, and specifically includes:

The method according to claim 4, wherein the process of processing the intercepted message by the proxy by the IPv6 communication partner comprises:

After the detection is passed, the communication partner proxy gateway proxyes the IPv6 communication partner to maintain information required during the detection process, and responds to the home agent of the mobile IPv6 node with a Home Test message, which is forwarded by the home agent to the Mobile IPv6 node; and,

The Care-of Test message is replied to the mobile IPv6 node.

6. The method according to claim 5, further comprising:

The method according to any one of claims 1 to 3, wherein the mobile IPv6 node communicates with the IPv6 communication partner by using a route optimization manner, including: when the mobile IPv6 node obtains the care-of address to the IPv6 When the communication partner performs registration, the mobile IPv6 node sends a binding update message to the IPv6 communication partner;

The communication partner proxy gateway intercepts the binding update message;

The method according to claim 7, wherein the process of processing, by the proxy, the IPv6 communication partner to the binding update message comprises:

The method according to any one of claims 1 to 3, wherein the mobile IPv6 node communicates with the IPv6 communication partner by using a route optimization manner, including: when the mobile IPv6 node obtains the care-of address to the IPv6 After the communication partner registers, the mobile IPv6 node sends an IPv6 data packet to the IPv6 communication partner by using a route optimization manner; the destination address in the IPv6 data packet is an IPv6 address corresponding to the IPv6 communication partner, and the source address is a mobile IPv6 node. Care-of address

The method according to claim 9, wherein the processing the IPv6 data packet specifically includes:

The communication partner proxy gateway searches for and obtains a corresponding home address in the binding cache information according to the care-of address of the mobile IPv6 node;

The method according to claim 10, wherein the mobile IPv6 node communicates with the IPv6 communication partner by using a route optimization manner, and the method further includes:

The communication partner proxy gateway sends the processed IPv6 data message to the mobile IPv6 node.

12. The method according to claim 11, wherein said pair of said ν6 communication The IPv6 data packets returned by the partner are processed, including:

The communication partner proxy gateway searches for a corresponding care-of address in the corresponding binding cache of the mobile IPv6 node according to the destination address of the home address in the data, and replaces the data when the transfer destination is confirmed. The destination address in the message;

The method according to claim 11, wherein the communication partner proxy gateway sends the processed IPv6 data packet to the mobile IPv6 node, specifically: the communication partner proxy gateway Transmitting the converted data packet to the mobile IPv6 node according to the IPv6 care-of address;

Receiving, by the mobile IPv6 node, a data packet sent by the communication partner proxy gateway, and replacing the IPv6 care-of address with the IPv6 home address;

And uploading the data packet to the application layer according to the IPv6 home address, and completing the receiving process of the data packet.

14. A communication partner proxy gateway, comprising:

The communication partner proxy gateway according to claim 14, further comprising: a capability determining unit, configured to use, according to the communication partner proxy gateway, intra-link IPv6 neighbor information, or routing information, or The configuration information on the communication partner proxy gateway determines whether the interaction information between the mobile IPv6 node and the IPv6 communication partner can be handled for the IPv6 communication partner agent.

The communication partner proxy gateway according to claim 14, wherein the interaction information acquisition unit comprises: a detection message intercepting unit, configured to intercept the mobile IPv6 node to send and forward to the IPv6 communication partner via the home agent thereof Home Test Init And a Care-of Test In message sent by the mobile IPv6 node to the IPv6 communication partner; the interaction information processing unit includes: a detection message processing unit, configured to: the mobile IPv6 node according to the truncated message Performing detection; after the detection passes, proxying the IPv6 communication partner to maintain information required during the detection process, and responding to the home agent of the mobile IPv6 node with a Home Test message; and responding to the mobile IPv6 node with a Care-of Test Message.

The communication partner proxy gateway according to claim 14, wherein the interaction information acquisition unit comprises: a binding update message intercepting unit, configured to intercept a binding update sent by the mobile IPv6 node to an IPv6 communication partner. Message

The interaction information processing unit includes: a binding update message processing unit, configured to perform legality verification on the intercepted binding update message according to information maintained in the detection process; and after the verification is passed, record in the binding cache The home address and the care-of address of the mobile IPv6 node in the binding update message, and responding to the mobile IPv6 node with a binding acknowledgement message.

The communication partner proxy gateway according to claim 14, wherein the interaction information acquisition unit comprises: a first data packet intercepting unit, configured to intercept the mobile IPv6 node and send the IPv6 communication by using a route optimization manner The IPv6 data packet of the partner; the destination address of the IPv6 data packet is an IPv6 address corresponding to the IPv6 communication partner, and the source address is a care-of address of the mobile IPv6 node;

The communication partner proxy gateway according to claim 18, wherein the interaction information obtaining unit further comprises: a second data packet intercepting unit, configured to intercept the IPv6 communication partner and return the mobile IPv6 node The IPv6 data packet, the returned IPv6 data ^=the destination address of the IPv6 communication address is the IPv6 home address corresponding to the IPv6 source address in the data packet received by the IPv6 communication partner;

The interaction information processing unit further includes: a second data packet processing unit, configured to search for a corresponding care-of address in a corresponding binding cache in the mobile IPv6 node according to the destination address of the home address in the data; When it is confirmed that the care-of address is obtained, it is used to replace the data message. Generating a destination address; generating a new IPv6 routing extension header in the processed data packet, and storing the IPv6 home address therein; and transmitting the converted data packet to the IPv6 care-of address according to the IPv6 care-of address Mobile IPv6 node.

The communication partner proxy gateway according to any one of claims 14 to 19, wherein the communication partner proxy gateway is in a communication link set when the mobile IPv6 node performs information interaction with the IPv6 communication partner. The provincial gateway device, the designated gateway device in the communication link when the mobile IPv6 node interacts with the IPv6 communication partner, the key gateway device set in the gateway between the networks, or the designated gateway device set in the gateway between the networks.