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Method and apparatus for translating protocol

  • US 20030185236A1
  • Filed: 09/05/2002
  • Published: 10/02/2003
  • Est. Priority Date: 03/27/2002
  • Status: Active Grant
First Claim
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1. A method for protocol translation in a network system where an IPv6 network to which a Mobile IPv6 terminal is connected is connected via a translation apparatus to an IPv4 network to which an IPv4 terminal is connected, comprising steps of:

  • retaining a first correlation between a home address of said Mobile IPv6 terminal and a virtual IPv4 address of the Mobile IPv6 terminal in said translation apparatus;

    transmitting a packet from said Mobile Ipv6 terminal to said IPv6 network with a care-of address specified as the packet'"'"'s source address and a home address specified in an extension header; and

    changing the packet'"'"'s source address to a virtual IPv4 address corresponding to the home address of the packet in accordance with said first correlation in said translation apparatus, and transmitting the packet from the translation apparatus to said IPv4 network.

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