IPv6/IPv4 translator

• US 20050185672A1
• Filed: 02/14/2005
• Published: 08/25/2005
• Est. Priority Date: 02/23/2004
• Status: Abandoned Application

• Current Assignee: Yokogawa Electric Corporation
• Original Assignee: Yokogawa Electric Corporation
• Inventors: Ozoe, Nobumichi, Endo, Masahito, Miyata, Hiroshi
• Application Number:
  US11/056,124
• Publication Number:
  US 20050185672A1
• Time in Patent Office: Days
• US Class Current: 370/466
• 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 65/1101 Session protocols
• CPC Class Codes: H04L 65/1104 Session initiation protocol [SIP]
• 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

Abstract

An object of the present invention is to realize packet communication between an IPv6 terminal connected to an IPv6 network and an IPv4 terminal connected to an IPv4 network. Another object of the present invention is to realize RTP communication for establishing sessions in accordance with SIP between an IPv6 terminal connected to an IPv6 network and an IPv4 terminal connected to an IPv4 network. For these objects, the present invention provides an IPv6/IPv4 translator for translating packets between IPv6 and IPv4 with means of translating addresses described in SIP messages into IPv6 addresses or IPv4 addresses. Moreover, the present invention provides the aforementioned IPv6/IPv4 translator with means of translating addresses described in SDP messages into IPv6 addresses or IPv4 addresses. These SDP messages shall be related to media data transmissions. Furthermore, the IPv6/IPv4 translator can be directly connected to a terminal connected to an IPv6 network and to a terminal connected to an IPv4 network, or can be connected via SIP proxy to an SIP terminal connected to an IPv6 network and to an SIP terminal connected to an IPv4 network. According to the present invention, the IPv6/IPv4 translator translates addresses described in SIP messages into IPv6 addresses or IPv4 addresses when translating packets from IPv6 to IPv4 or from IPv4 to IPv6. Therefore, it will be possible to perform communication from a terminal supporting IPv6 only to a terminal supporting IPv4 only. Also, it will be possible to perform communication from a terminal supporting IPv4 only to a terminal supporting IPv6 only. In addition, the IPv6/IPv4 translator translates addresses described in SDP messages into IPv6 addresses or IPv4 addresses when translating packets from IPv6 to IPv4 or from IPv4 to IPv6. Therefore, it will be possible to perform RTP communication for establishing sessions in accordance with SIP from IPv6 to IPv4 or conversely from IPv4 to IPv6, which is suitable for media data transmissions such as IP phone services.

Claims

1. An IPv6/IPv4 translator for translating packets between IPv6 and IPv4, wherein means of translating addresses described in SIP messages into IPv6 addresses or IPv4 addresses is provided.

2. The IPv6/IPv4 translator of claim 1, wherein means of translating addresses described in SDP messages into IPv6 addresses or IPv4 addresses is provided.

3. The IPv6/IPv4 translator of claim 2, wherein said SDP messages are related to media data transmissions.

4. The IPv6/IPv4 translator of any of claims 1 to 3, wherein said IPv6/IPv4 translator is directly connected to a terminal connected to an IPv6 network and to a terminal connected to an IPv4 network.

5. The IPv6/IPv4 translator of any of claims 1 to 3, wherein said IPv6/IPv4 translator is connected via SIP Proxy to an SIP terminal connected to an IPv6 network and to an SIP terminal connected to an IPv4 network.