Method and apparatus for translating protocol
First Claim
1. A method for protocol translation in a network system where an IPv6 network connected to a Mobile IPv6 terminal is connected via a translation apparatus to an IPv4 network connected to an IPv4 terminal, the method comprising:
- retaining a first correlation between a home address of said Mobile IPv6 terminal and a virtual IPv4 address assigned to 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 the virtual IPv4 address corresponding to the home address of the packet from said Mobile IPv6 terminal in accordance with said first correlation in said translation apparatus, and transmitting the packet from the translation apparatus to said IPv4 network.
1 Assignment
0 Petitions
Accused Products
Abstract
A translation apparatus retains a first correlation between a Mobile IPv6 terminal'"'"'s home address and virtual IPv4 address. When the Mobile IPv6 terminal transmits a packet 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, the translation apparatus changes the packet'"'"'s source address to a virtual IPv4 address that corresponds to the packet'"'"'s home address in accordance with the first correlation, and then transmits the packet to an IPv4 network. Mobile IPv6 terminal-to-IPv4 terminal communication can then be established between an IPv6 network to which Mobile IPv6 terminals are connected and an IPv4 network to which IPv4 terminals are connected.
14 Citations
9 Claims
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1. A method for protocol translation in a network system where an IPv6 network connected to a Mobile IPv6 terminal is connected via a translation apparatus to an IPv4 network connected to an IPv4 terminal, the method comprising:
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retaining a first correlation between a home address of said Mobile IPv6 terminal and a virtual IPv4 address assigned to 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 the virtual IPv4 address corresponding to the home address of the packet from said Mobile IPv6 terminal in accordance with said first correlation in said translation apparatus, and transmitting the packet from the translation apparatus to said IPv4 network. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for protocol translation in a network system where an IPv6 network connected to a Mobile IPv6 terminal is connected via a translation apparatus to an IPv4 network connected to an IPv4 terminal, the method comprising:
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retaining a first correlation between a home address of said Mobile IPv6 terminal and a virtual IPv4 address assigned to 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 the virtual IPv4 address corresponding to the home address of the packet from said Mobile Ipv6 terminal in accordance with said first correlation in said translation apparatus, and transmitting the packet from the translation apparatus to said IPv4 network, wherein said virtual IPv4 address contained in the packet that may be received by the IPv4 terminal remains unchanged, even if the care-of address is changed due to a move of the Mobile IPv6 terminal.
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8. A protocol translation apparatus connectable between an IPv6 network connected to a Mobile IPv6 terminal and an IP4 network connected to an IPv4 terminal, the apparatus comprising:
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a means for retaining a correlation between a home address of said Mobile IPv6 terminal and a virtual IPv4 address assigned to the Mobile IPv6 terminal; and a means for receiving a packet transmitted to said IPv6 network by said Mobile IPv6 terminal with a care-of address specified as the packet transmission source and a home address specified in the extension header and transmitting the packet to said IPv4 network with the packet'"'"'s source address changed to a virtual IPv4 address that corresponds to the packet'"'"'s home address in accordance with said first correlation. - View Dependent Claims (9)
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Specification