Mobile node, mobile agent and network system

Claim 1

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; and movement 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.

Claim 14

A method of controlling a mobile node by a mobile agent in a network system in which a first IP (Internet Protocol) network capable of executing communication in accordance with first and second kinds of IPs and a second IP network capable of executing communication in accordance with only said first kind of IP are connected with each other, so that said mobile node capable of executing communication in accordance with said second kind of IP can communicate with other nodes belonging to said first IP network in accordance with said second kind of IP when said mobile node moves from said first IP network to said second IP network, comprising the steps of: adding a first kind of IP header in which an IP address, in accordance with said first kind of IP, of a second mobile agent belonging to said second IP network is set as a foreign address by a first mobile agent belonging to said first IP network and an IP address, in accordance with said first kind of IP, of said first mobile agent is set as a home address, to an IP packet in accordance with said second kind of IP, transmitted from said other nodes to said mobile node, and transmitting said IP packet to said second mobile agent; and deleting said first kind of IP header by said second mobile agent and transmitting said IP packet to said mobile node.

Claim 15

A method of controlling a mobile node by a mobile agent in a network system in which a first IP (Internet Protocol) network capable of executing communication in accordance with first and second kinds of IPs and a second IP network capable of executing communication in accordance with only said first kind of IP are connected with each other, so that said mobile node capable of executing communication in accordance with said second kind of IP can communicate with other nodes belonging to said first IP network in accordance with said second kind of IP when said mobile node moves from said first IP network to said second IP network, comprising the steps of: adding a first kind of IP header in which an IP address, in accordance with said first kind of IP, of a second mobile agent belonging to said second IP network is set as a foreign address by a first mobile agent belonging to said first IP network and an IP address, in accordance with said first kind of IP, of said first mobile agent is set as a home address, to an IP packet in accordance with said second kind of IP, transmitted from said other nodes to said mobile node, and transmitting said IP packet to said second mobile agent; and deleting said first kind of IP header by said second mobile agent and transmitting said IP packet to said mobile node.

Claim 16

A method of controlling a mobile node by a mobile agent in a network system in which a first IP (Internet Protocol) network capable of executing communication in accordance with first and second kinds of IPs and a second IP network capable of executing communication in accordance with only said first kind of IP, so that said mobile node capable of executing communication in accordance with said second kind of IP can communicate with other nodes belonging to said first IP network in accordance with said second kind of IP when said mobile node moves from said first IP network to said second IP network, comprising the steps of: adding a second kind of an IP header, in which an IP address, in accordance with said second kind of IP, of said mobile node relating to said second IP network is set as a foreign address by a first mobile agent belonging to said first IP network and an IP address, in accordance with said second kind of IP, of said first mobile agent is set as a home address, to an IP packet, in accordance with said second kind of IP, transmitted from said other nodes to said mobile node, adding further a first kind of IP header, in which an IP address, in accordance with said first kind of IP, of said second mobile agent belonging to said second IP network is set as a foreign address and an IP address, in accordance with said first kind of IP, of said first mobile agent is set as a home address, and transmitting said packet to said second mobile agent; and deleting said first kind of said IP header by said second mobile agent and transmitting said IP packet to said mobile node.

Claim 17

A method of controlling a mobile node by a mobile agent in a network system in which a first IP (Internet Protocol) network capable of executing communication in accordance with first and second kinds of IPs and a second IP network capable of executing communication in accordance with only said first kind of IP, so that said mobile node capable of executing communication in accordance with said second kind of IP can communicate with other nodes belonging to said first IP network in accordance with said second kind of IP when said mobile node moves from said first IP network to said second IP network, comprising the steps of: adding a second kind of an IP header, in which an IP address, in accordance with said second kind of IP, of said mobile node relating to said second IP network is set as a foreign address by a first mobile agent belonging to said first IP network and an IP address, in accordance with said second kind of IP, of said first mobile agent is set as a home address, to an IP packet, in accordance with said second kind of IP, transmitted from said other nodes to said mobile node, adding further a first kind of IP header, in which an IP address, in accordance with said first kind of IP, of said second mobile agent belonging to said second IP network is set as a foreign address and an IP address, in accordance with said first kind of IP, of said first mobile agent is set as a home address, and transmitting said packet to said second mobile agent; and deleting said first kind of said IP header by said second mobile agent and transmitting said IP packet to said mobile node.

Claim 18

A method of controlling a mobile node by a mobile agent in a network system in which a first IP (Internet Protocol) network capable of executing communication in accordance with first and second kinds of IPs and a second IP network capable of executing communication in accordance with only said first kind of IP are connected with each other, so that said mobile node capable of executing communication in accordance with said second kind of IP can communicate with other nodes belonging to said first IP network in accordance with said second kind of IP when said mobile node moves from said first IP network to said second IP network, comprising the steps of: adding a first kind of an IP header, in which an IP address, in accordance with said first kind of IP, of a first mobile agent belonging to said first IP network is set as a foreign address by a second mobile agent belonging to said second IP network and an IP address, in accordance with said first kind of IP, of said second mobile agent is set as a home address, to an IP packet in accordance with said second kind of IP transmitted from said mobile node to said other node, and transmitting said IP packet to said first mobile agent; and deleting said first kind of IP header by said first mobile agent and transmitting said IP packet to said other node.

Claim 19

A method of controlling a mobile node by a mobile agent in a network system in which a first IP (Internet Protocol) network capable of executing communication in accordance with first and second kinds of IPs and a second IP network capable of executing communication in accordance with only said first kind of IP are connected with each other, so that said mobile node capable of executing communication in accordance with said second kind of IP can communicate with other nodes belonging to said first IP network in accordance with said second kind of IP when said mobile node moves from said first IP network to said second IP network, comprising the steps of: adding a first kind of an IP header, in which an IP address, in accordance with said first kind of IP, of a first mobile agent belonging to said first IP network is set as a foreign address by a second mobile agent belonging to said second IP network and an IP address, in accordance with said first kind of IP, of said second mobile agent is set as a home address, to an IP packet in accordance with said second kind of IP transmitted from said mobile node to said other node, and transmitting said IP packet to said first mobile agent; and deleting said first kind of IP header by said first mobile agent and transmitting said IP packet to said other node.

Claim 20

A method of controlling a mobile node by a mobile agent in a network system in which a first IP (Internet Protocol) network capable of executing communication in accordance with first and second kinds of IPs and a second IP network capable of executing communication in accordance with only said first kind of IP, so that said mobile node capable of executing communication in accordance with said second kind of IP can communicate with other nodes belonging to said first IP network in accordance with said second kind of IP when said mobile node moves from said first IP network to said second IP network, comprising the steps of: adding a first kind of an IP header, in which an IP address, in accordance with said first kind of IP, of a first mobile agent belonging to said first IP network is set as a foreign address by a second mobile agent belonging to said second IP network and an IP address, in accordance with said first kind of IP, of said second mobile agent is set as a home address, to a movement registration request message in accordance with said second kind of IP received from said mobile node, and transmitting said message to said first mobile agent; adding a first kind of an IP header, in which an IP address, in accordance with said first kind of IP, of said second mobile agent is set as a foreign address by said first mobile agent and an IP address, in accordance with said first kind of IP, of said first mobile agent is set as a home address, to a message in accordance with said second kind of IP for permitting the movement, and transmitting said message to said second mobile agent; and deleting said first kind of said IP header by said second mobile agent and transmitting said message to said mobile node.

Claim 21

A method of controlling a mobile node by a mobile agent in a network system in which a first IP (Internet Protocol) network capable of executing communication in accordance with first and second kinds of IPs and a second IP network capable of executing communication in accordance with only said first kind of IP, so that said mobile node capable of executing communication in accordance with said second kind of IP can communicate with other nodes belonging to said first IP network in accordance with said second kind of IP when said mobile node moves from said first IP network to said second IP network, comprising the steps of: adding a first kind of an IP header, in which an IP address, in accordance with said first kind of IP, of a first mobile agent belonging to said first IP network is set as a foreign address by a second mobile agent belonging to said second IP network and an IP address, in accordance with said first kind of IP, of said second mobile agent is set as a home address, to a movement registration request message in accordance with said second kind of IP received from said mobile node, and transmitting said message to said first mobile agent; adding a first kind of an IP header, in which an IP address, in accordance with said first kind of IP, of said second mobile agent is set as a foreign address by said first mobile agent and an IP address, in accordance with said first kind of IP, of said first mobile agent is set as a home address, to a message in accordance with said second kind of IP for permitting the movement, and transmitting said message to said second mobile agent; and deleting said first kind of said IP header by said second mobile agent and transmitting said message to said mobile node.