Patent ID: 6172986
Filing Date: 2001-01-09
Classification: H04L,H04W

Abstract:
A mobile node moving between IP (Internet Protocol) networks, comprising:IPv4 (Internet Protocol version 4) processing means for executing services in accordance with said IPv4;IPv6 (Internet Protocol version 6) processing means for executing services in accordance with said IPv6;communication processing means for executing transmission/reception control of packets to and from said networks; andmovement registration processing means for adding an IPv4 header (an IP header used for said IPv4), in which an IPv4 address of a mobile agent is set as a foreign address and an IPv4 address of said mobile node usable in a foreign IPv4 network is set as a home address, to a message used for said IPv6 so as to register the movement of said mobile node to said mobile agent connected to an IPv4/v6 network (a network capable of executing communication by utilizing both of said IPv4 and said IPv6) for assisting the movement of said mobile node when said mobile node moves from said IPv4/v6 network to an IPv4 network (a network capable of executing communication by utilizing only said IPv4), and transmitting said message.