Method for realizing protocol edition compatible between apparatuses in mobile IP network

Abstract

Adding extension field of protocol version number to registered information message of mobile IP, the method makes party of sending message possible to inform party of receiving message that protocol version number is adopted in the party of sending message. According to version number, the party of receiving message determines relevant protocol process mode so as to guarantee compatibility between devices of implementing new / old version according to mobile IP protocol. The invention guarantees that mobile nodes can obtain mobile IP protocol service reliably, and ensures interoperability between devices from different manufacturers. The method does not need to add new entitative device in mobile IP network, and will not increase additional cost of building network for multiple versions in protocol.

Description

technical field [0001] The invention relates to the technical field of network communication, in particular to a method for realizing protocol version compatibility between devices in a mobile IP network. Background technique [0002] Mobile IPv4 is a communication protocol that provides mobile support functions based on the network layer on the Internet (Internet). Continuity of communication between nodes for Mobile IP functionality. [0003] Because the mobile IPv4 technology solves the problem that users can freely realize network access during roaming, the 3G standard IMT2000 has clearly stipulated that the third-generation mobile communication system must support mobile IP packet services. [0004] With the continuous evolution of IETF (Internet Engineering Task Force) standardization work on mobile IP, IETF has released two sets of mobile IP protocol standards: RFC 2002 and RFC 3344, of which RFC 3344 is the latest version and is used to replace the original RFC 2002...

AI Technical Summary

Problems solved by technology

At this time, the home agent can only calculate the authentication value according to the protocol implemented by itself, which will inevitably reject the registration requests of some mobile nodes with inconsistent protocols due to authentication failure, resulting in the failure of mobile nodes following a certain RFC standard to obtain mobile IP service, although there is no problem with the protocol implementation of the mobile node itself

[0022] Therefore, due to the existence of multiple standards in mobile IP, and the design of mobile IP does not consider the issue of compatibility between versions, it is difficult to ensure interoperability between devices from different equipment vendors

Furthermore, the modification of RFC 3344 to the authentication calculation method of the registration message is likely to cause the mobile node in the wireless network to be unable to obtain the mobile IP service normally due to the different protocol versions.

[0023] Of course, in order to solve the problem of version compatibility between devices, the network operator can also add multiple physical devices to provide support for different versions of the mobile IP protocol, but this will greatly increase the network construction cost of the network operator

Images