System and method for interworking between IPv4 (internet protocol version 4) and IPv6 (internet protocol version 6) based on DHT (distributed hash table)

Abstract

The invention provides a system and method for interworking between the IPv4 (internet protocol version 4) and the IPv6 (internet protocol version 6) based on a DHT (distributed hash table). The system only improves a terminal and takes a new double stack gateway which is arranged at the network perimeter between the IPv4 and the IPv6 as an application layer gateway rather than changing the othernetwork element equipment arranged in the original IPv4 or IPv6 network. The common point of the terminal and the application layer gateway is that an application later is additionally provided with five sequence connection modules, namely an address conversion module, a DHT layer building and maintaining module, a route path querying module, a shortest route path computing module and a data packet transmitting module; and on the basis of the added modules, each application layer gateway is logically mapped to form a DHT converge network. In order to realize the interconnection and the intercommunication of the IPv4 node and the IPv6 node, the terminal is further additionally provided with a scene judging module. The invention is used for realizing the interconnection and the intercommunication of the IPv4 and the IPv6 on the basis that the existing IPv4 protocol and IPv6 protocol are minimally changed. In the invention, the address difference of the original IPv4 network node and IPv6 network node is eliminated, and the data communication is completed by two different host machines according to an IP (internet protocol) address sequence with a set rule. By adopting the DHT technology, the invention is good in expandability and scalability.

Description

technical field [0001] The invention relates to a system and method for realizing IPv4 and IPv6 intercommunication based on distributed hash table DHT, which is used to solve the problem of smooth transition from IPv4 to IPv6, and belongs to the technical field of realizing IPv4 and IPv6 intercommunication in the Internet. Background technique [0002] At present, the 32-bit space of IPv4 addresses has become more and more exhausted, and the problem of exhaustion of IPv4 address resources will soon be faced in the future. The 128-bit address space of IPv6 can solve the problem of exhaustion of IPv4 addresses. At the same time, IPv6 also Can bring many good features, such as security, mobility and quality of service management. However, due to the difference in address length and packet header structure between IPv4 and IPv6, the two packets cannot communicate directly. E.g, figure 1 In the network topology shown, the light-colored and colorless clouds in the lower part of ...

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Problems solved by technology

[0010] In view of this, the purpose of the present invention is to provide a system and method for realizing IPv4 and IPv6 intercommunication based on distributed hash table DHT, thereby on the basis of minimizing changing IPv4 and IPv6 agreement, solve the existing IPv4 and IPv6 hybrid network The problem of node interconnection in

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