Multiplex communications – Pathfinding or routing – Switching a message which includes an address header
Reexamination Certificate
2007-03-20
2007-03-20
To, Doris H. (Department: 2616)
Multiplex communications
Pathfinding or routing
Switching a message which includes an address header
C370S466000
Reexamination Certificate
active
11179501
ABSTRACT:
In an apparatus, there are provided an IP transmitting and receiving unit for transmitting and receiving an IPv4 packet and an IPv6 packet; an IP header converting unit for performing a mutual conversion of the IPv4 packet and the IPv6 packet by an IP header conversion; a DNS substituting unit for receiving a domain information capturing request sent from an IPv4 terminal or an IPv6 terminal and substituting its process; an IPv4 address capturing unit for capturing an IPv4 address from a DHCP server; and an IP address conversion information holding unit for holding an IPv6 address of the IPv6 terminal and the IPv4 address captured by the IPv4 address capturing unit in correspondence to each other. Thus, a communication with the IPv4 terminal can be executed without preliminarily fixedly allocating the IPv4 address to the IPv6 terminal.
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Atarashi Yoshifumi
Hamamoto Shinichi
Higuchi Hidemitsu
Ikeda Naoya
Miyamoto Takahisa
Hitachi , Ltd.
Mattingly ,Stanger ,Malur & Brundidge, P.C.
Nguyen Phuongchau Ba
To Doris H.
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