Communication method for internet protocol version (IPv)4/IPv6 translation and tunnel combination of unsymmetrical digital subscriber loop

Abstract

The invention discloses a method for internet protocol version (IPv)4 / IPv6 translation and tunnel combination of an unsymmetrical digital subscriber loop for operators, and relates to the technical field of computer network. In the method, 1:N stateless IPv4 / IPv6 translation and RFC2473 package / de-package are performed at a broadband access server side; a single IPv6 / 64 prefix is allocated to a home gateway connected to each user, wherein the prefix not only comprises a common IPv6 address but also comprises a special IPv6 address in which a shared public IPv4 address is embedded; the IPv4 / IPv6 translation comprising an interface collision detection is performed and the RFC2473 package / de-package is performed on the special IPv6 address on the home gateway of the user; and the shared public IPv4 address and the common IPv6 address are allocated to a computer of the user through the home gateway to ensure that the user can share scarce public IPv4 addresses and perform a two-way initiated end-to-end communication without an application layer gateway with the global IPv4 internet, and simultaneously, the user can perform a full-function communication with the global IPv6 internet.

Description

technical field [0001] The invention relates to the technical field of computer networks, in particular to an IPv4 / IPv6 translation and tunnel combination communication method of an asymmetric digital subscriber loop. Background technique [0002] The Internet has become the most important information infrastructure in the world, but the addressing range of IPv4, the fourth version of the network protocol widely used on the Internet, is only 2 32 , that is, 4.3 billion addresses, and the current IPv4 addresses are about to be allocated. [0003] At present, the absolute number of Internet users in China has become the first in the world, but the penetration rate of the Internet is only 23%, far below the level of developed countries (70%). At the same time, each Chinese Internet user has only 0.6 IPv4 addresses on average. Therefore, for China, IPv4 addresses cannot meet the demand. This problem is very serious for India and other Asian countries and African countries. ...

AI Technical Summary

Problems solved by technology

Its advantage is that the header structure of the IPv4 packet can be completely preserved, and its disadvantage is that it increases the overhead of the tunnel (increasing 20 bytes)

The present invention adds RFC2473 encapsulation / decapsulation on the basis of the basic IPv4 / IPv6 translation method of the asymmetric digital subscriber loop, and has the characteristics of completely retaining the header structure of the IPv4 packet, while maintaining the basic asymmetric digital subscriber loop The characteristics of the IPv4 / IPv6 translation method, such as the core network translator being stateless, supporting two-way initiated communication, etc., its only disadvantage is that it cannot be compatible with the IVI packet structure

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