ADDRESS TRANSLATOR, MESSAGE PROCESSING METHOD AND EQUIPMENT

• US 20090150567A1
• Filed: 02/17/2009
• Published: 06/11/2009
• Est. Priority Date: 12/07/2001
• Status: Active Grant

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: Takeda, Yukiko, Inouchi, Hidenori
• Granted Patent: US 7,788,408 B2
• Time in Patent Office: Days
• US Class Current: 709/245
• CPC Class Codes: H04L 45/741 Routing in networks with a plurality of addressing schemes, e.g. with both IPv4 and IPv6
• CPC Class Codes: H04L 61/00 Network arrangements, protocols or services for addressing or naming
• CPC Class Codes: H04L 61/251 between different IP versions
• CPC Class Codes: H04L 61/2564 for a higher-layer protocol, e.g. for session initiation protocol [SIP]
• CPC Class Codes: H04L 61/2575 using address mapping retrieval, e.g. simple traversal of user datagram protocol through session traversal utilities for NAT [STUN]
• CPC Class Codes: H04L 61/2585 through application level gateway [ALG]
• CPC Class Codes: H04L 69/08 Protocols for interworking; Protocol conversion
• CPC Class Codes: H04L 69/16 Implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP]
• CPC Class Codes: H04L 69/167 Adaptation for transition between two IP versions, e.g. between IPv4 and IPv6 translation of Internet protocol [IP] addresses H04L61/2503
• CPC Class Codes: H04L 69/22 Parsing or analysis of headers
• CPC Class Codes: H04L 9/40 Network security protocols

Abstract

An address translator includes an SIP message detecting function. Upon detection of an SIP message, the address translator sends the SIP message to an SIP address translator. The SIP address translator extracts addresses for translation, and makes a query to the address translator. The SIP address translator translates an IP address included in the SIP message, using translation information of the address translator. Thus, an SIP communication is accomplished between terminals belonging to different regions in association of the address translator and the SIP address translator.

Claims

1. An address translator for connecting a network A conforming to a protocol P to a network B conforming to a protocol Q, said address translator comprising:

an address translating function for translating an address conforming to the protocol P to an address conforming to the protocol Q, or vice versa; and

a detecting function for detecting a communication conforming to a particular protocol,

wherein said address translator translates an address described in a first region of communication data by said address translation function, and

when said address translator detects a communication conforming to said particular protocol, said address translator creates translation information including a correspondence relationship between addresses in the protocol P and addresses in protocol Q for translating an address described in a second region of the communication data.