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Ip address translator and packet transfer apparatus

A conversion device and technology of address conversion, applied in transmission systems, digital transmission systems, data exchange networks, etc., can solve the problem that IPv4 SIP servers and IPv6 SIP servers do not have communication processing functions.

Inactive Publication Date: 2005-02-02
HITACHI COMM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, the address translation device does not receive an inquiry of the IP address of the destination terminal from the sender terminal as in Patent Documents 1 and 2.
In addition, the IPv4 SIP server and the IPv6 SIP server do not have a communication processing function for assigning a virtual IP address to each terminal on the sending side and the receiving side
[0014] Therefore, the allocation method of the virtual IP address of each terminal on the sending side and the receiving side and the notification method of the virtual IP address of the other terminal become a problem
In addition, for the address translation device, how to set the address translation table information required in the IP address translation of the data packets communicated between terminals has also become a problem

Method used

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  • Ip address translator and packet transfer apparatus
  • Ip address translator and packet transfer apparatus
  • Ip address translator and packet transfer apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0078] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0079] FIG. 1 shows an example of a communication network to which the address translator of the present invention is applied.

[0080] In Fig. 1, 1 is a packet transmission device having the address conversion table function between the IPv4 address and the IPv6 address described later, which connects a plurality of IP networks 2 (2-1 to 2-m) and serves as the payload of the SIP message. SIP-ALG (Application Level Port) 7 for transducer function. In the illustrated example, in the packet transfer device 1, IPv4 networks 2-1, 2-2, ... with IPv4 SIP servers 3-1, 3-2, ... are connected, and IPv6 SIP servers 3-k , ..., 3-m IPv6 network 2-k, ..., 2-m.

[0081] In IPv4 network 2-1, 2-2, ..., accommodate IPv4 terminal 5 (5A, 5B, 5C, ...) and server 8 (8A, 8C, ...), in IPv6 network 2~k , . . . , 2-m accommodate IPv6 terminals ( 6A, 6B, . . . , 6N) and servers 9 ( 6A, . . . ...

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Abstract

An IP address translator comprising: SIP-ALG message processing unit for assigning a virtual IP address in a process of establishing a session between an IPv4 apparatus and an IPv6 apparatus via a SIP server; an address translation table for storing a relation between an IPv4 address and a virtual IPv6 address, a relation between an IPv6 address and a virtual IPv4 address, and filter information in association with each of the virtual addresses; and a processor for performing address translation on the IPv4 and IPv6 packets according to the address translation table, wherein header information of received packets is checked on the basis of the filter information before the address translation to discard a packet which does not adapt to the filter information.

Description

technical field [0001] The present invention relates to an IP address conversion device and a packet transmission device, and more specifically, relates to effective IP address conversion when performing packet communication between two terminal devices connected to IP networks with different address systems through a virtual session (dialogue) device and packet transfer device. Background technique [0002] Along with the rapid popularization of the IP (Internet Protocol) network, due to the lack of addresses in the IPv4 (Internet Protocol Version 4) network applicable to 32-bit length addresses, a new communication protocol IPv6 (Internet Protocol Version 4) using 128-bit length addresses has been proposed. 6). When a communication device connected to an IPv4 network (hereinafter referred to as an IPv4 terminal) communicates with a communication device connected to an IPv6 network (hereinafter referred to as an IPv6 terminal), in the connection device between the IPv4 net...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/70H04L12/46H04L12/66H04L29/06H04L29/08H04L29/12
CPCH04L69/16H04L69/167H04L61/251H04L69/161H04L29/12556H04L61/2585H04L61/2564H04L29/125H04L67/14H04L29/12358
Inventor 续木彰人末吉范行
Owner HITACHI COMM TECH