Communication system, gateway equipment, communication method and authentication method
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H04Q-007/20
H04L-012/28
H04L-012/56
출원번호
US-0619572
(2003-07-16)
등록번호
US-7328014
(2008-02-05)
우선권정보
JP-2003-069722(2003-03-14)
발명자
/ 주소
Takeda,Yukiko
Inouchi,Hidenori
Takeuchi,Keisuke
Suzuki,Shinsuke
출원인 / 주소
Hitachi, Ltd.
대리인 / 주소
Mattingly, Stanger, Malur & Brundidge, P.C.
인용정보
피인용 횟수 :
11인용 특허 :
0
초록▼
A communication method and system allowing MN (mobile nodes) to acquire a home address in a visited network. The communication system includes a home network installed with a home agent for holding mobile terminal location information and, a visited network installed with a radio communications devi
A communication method and system allowing MN (mobile nodes) to acquire a home address in a visited network. The communication system includes a home network installed with a home agent for holding mobile terminal location information and, a visited network installed with a radio communications device for communicating with that mobile terminal, and gateway equipment in the visited network for forming an interface with the home network. The radio communication device includes an access request transfer unit for forwarding access requests from a mobile terminal of the visited network to the gateway equipment which makes an acquisition request to the home agent for an identifier of that mobile terminal, and forwards that acquired identifier to that mobile terminal.
대표청구항▼
What is claimed is: 1. A communication system comprising: a home network installed with a home agent for holding mobile terminal location information of a mobile terminal, the mobile terminal using a first home address in the home network; a visited network installed with a radio communications dev
What is claimed is: 1. A communication system comprising: a home network installed with a home agent for holding mobile terminal location information of a mobile terminal, the mobile terminal using a first home address in the home network; a visited network installed with a radio communications device for communicating with a mobile terminal; and gateway equipment in said visited network for forming an interface with said home network, wherein said radio communication device contains an access request transfer means for forwarding access requests from said mobile terminal having moved to the visited network to said gateway equipment, wherein said gateway equipment comprises: a prefix request means for requesting a prefix for said mobile terminal having moved to the visited network from said home agent in response to an access request from said mobile terminal having moved to the visited network, and a prefix transfer means for receiving the requested prefix from said home agent and forwarding the received prefix to said mobile terminal having moved to the visited network, and wherein the prefix is used, by said mobile terminal, to generate a second home address of said mobile terminal having moved to the visited network, wherein along with making a prefix acquisition request, said prefix request means also requests acquisition of Domain Name Server (DNS) server information from said home agent, and wherein said prefix transfer means forwards the acquired DNS server information along with said prefix to said mobile terminal having moved to the visited network. 2. A communication system according to claim 1, further comprising: decision means for deciding whether or not authentication processing of said mobile terminal having moved to the visited network is required, utilizing a source address of the access request from said mobile terminal having moved to the visited network; and authentication means for starting authentication processing of said mobile terminal having moved to the visited network when said decision means decides that authentication processing is required, wherein said prefix request means makes a request to said home agent for acquisition of said mobile terminal prefix after said authentication is successful. 3. A communication system according to claim 2, wherein said gateway equipment further comprises: location information holding means for holding location information on said mobile terminal having moved to the visited network, wherein said authentication means starts said authentication processing after said location information holding means has received a location registration request from said mobile terminal having moved to the visited network. 4. A communication system according to claim 3, wherein said location information holding means holds location information on said mobile terminal having moved to the visited network after said authentication processing was successful. 5. A communication system according to claim 1, further comprising: network management equipment connected to said home network and said visited network, wherein said home agent and said gateway equipment comprise acquisition means for acquiring, from said network management equipment, programs and data required for distributing prefixes and authenticating said mobile terminal. 6. A communication system comprising: a home network installed with a home agent for holding mobile terminal location information of a mobile terminal, the mobile terminal using a first home address in the home network, a visited network installed with a radio communications device for communicating with a mobile terminal; and gateway equipment in said visited network for forming an interface with said home network, wherein said radio communication device contains an access request transfer means for forwarding access requests from said mobile terminal having moved to the visited network to said gateway equipment, wherein said gateway equipment comprises: a prefix request means for requesting a prefix for said mobile terminal having moved to the visited network from said home agent in response to an access request from said mobile terminal having moved to the visited network, and a prefix transfer means for receiving the requested prefix from said home agent and forwarding the received prefix to said mobile terminal having moved to the visited network, wherein said mobile terminal comprises: home address creation means for acquiring said prefix from said prefix transfer means of said gateway equipment and creating, by said mobile terminal, based on said prefix, a second home address, and binding information registration means for registering information corresponding to said second home address created from said prefix and identification information of said mobile terminal having moved to the visited network at a Domain Name Server (DNS) server in the visited network, relay network or in a home network; wherein along with making a prefix acquisition request, said prefix request means also requests acquisition of Domain Name Server (DNS) server information from said home agent, and wherein said prefix transfer means forwards the acquired DNS server information along with said prefix to said mobile terminal having moved to the visited network. 7. A gateway equipment, installed in a visited network containing a radio communications device for communicating with a mobile terminal, for forming an interface with a home network containing a home agent for holding location information on said mobile terminal, the mobile terminal using a first home address in the home network, said gateway equipment comprising: a prefix acquisition request means for requesting acquisition of a prefix for said mobile terminal having moved to the visited network from said home agent in response to an access request from said mobile terminal having moved to the visited network; and a prefix transfer means for receiving the requested prefix from said home agent and forwarding the received prefix to said mobile terminal having moved to the visited network; wherein the prefix is used, by said mobile terminal, to generate a second home address of said mobile terminal having moved to the visited network, wherein said prefix request means makes a prefix acquisition request and a Domain Name Server (DNS) server information request to said home agent, and wherein said prefix transfer means forwards the acquired DNS server information along with said prefix to said mobile terminal having moved to the visited network. 8. A gateway equipment according to claim 7, further comprising: decision means for deciding whether or not authentication processing using a source address for the access request from said mobile terminal having moved to the visited network is required; and authentication means for starting authentication processing of said mobile terminal having moved to the visited network when said decision means decides that authentication is required, wherein said prefix request means makes a request to said home agent to acquire the prefix of said mobile terminal having moved to the visited network after said authentication was successful. 9. A gateway equipment according to claim 8, further comprising: location information holding means for holding information of a location of said mobile terminal having moved to the visited network, wherein said authentication means starts said authentication processing after receiving a location registration request from said mobile terminal having moved to the visited network for said location information holding means. 10. A gateway equipment according to claim 9, wherein said location information holding means holds location information of said mobile terminal having moved to the visited network after said authentication was successful. 11. A communication method in a communication system including a home network installed with a home agent for holding mobile terminal location information of a mobile terminal, a visited network installed with a radio communication device for communicating with a mobile terminal, and gateway equipment in said visited network for forming an interface with said home network, the mobile terminal using a first home address in the home network, said communication method comprising: forwarding, by said radio communication device, an access request from said mobile terminal having moved to the visited network to said gateway equipment; making, by said gateway equipment, an acquisition request to said home agent for a prefix for said mobile terminal having moved to the visited network and forwarding an acquired prefix to said mobile terminal having moved to the visited network; and creating, by said mobile terminal having moved to the visited network, a second home address based on said prefix acquired from said gateway equipment, searching a Domain Name Server (DNS) terminal and forwarding a packet addressed to said mobile terminal having moved to the visited network by registering mapping information along with said second home address generated from said prefix and a mobile terminal identification information in a DNS server within a relay network or home network, making, by said gateway equipment, a DNS server information acquisition request and a prefix request to said home agent, and forwarding said acquired DNS server information and identifier to said mobile terminal having moved to the visited network. 12. A communication method according to claim 11, further comprising: deciding, by said gateway equipment, whether or not authentication processing is required using a source address of the access request from said mobile terminal having moved to the visited network; starting, by said gateway equipment, the authentication processing for the mobile terminal having moved to the visited network when it is decided by said deciding step that authentication is required; and requesting, by said gateway equipment, acquisition of a prefix for said mobile terminal from said home agent after the authentication was successful. 13. A communication method according to claim 12, further comprising: holding, by said gateway equipment, the location information of said mobile terminal having moved to the visited network; and starting, by said gateway equipment, said authentication processing after receiving a location registration request from said mobile terminal having moved to the visited network. 14. A communication method according to claim 13, further comprising: holding, by said gateway equipment, said mobile terminal location information after said authentication was successful. 15. A communication method according to claim 11, further comprising: acquiring, by said mobile terminal, having moved to the visited network said prefix from said gateway equipment and creating a second home address for said mobile terminal having moved to the visited network, and registering mapping information, with said second home address generated from said prefix and said mobile terminal identification information, in a DNS server within a home network, or a visited network or relay network. 16. A communication method according to claim 11, wherein said communication system further includes a network management equipment connected to said home network and said visited network, wherein said home agent and said gateway equipment acquire programs and data from said network management equipment required for distributing the prefixes and authenticating mobile terminals. 17. An authentication method for a mobile terminal used in a communication system which includes a home network installed with a home agent for holding mobile terminal location information of a mobile terminal, a visited network installed with a radio communications device for communicating with a mobile terminal, and gateway equipment in said visited network for forming an interface with said home network, the mobile terminal using a first home address in the home network, wherein said radio communication device forwards an access request from said mobile terminal having moved to the visited network to said gateway equipment, said authentication method comprising: making, by said gateway equipment, an acquisition request to said home agent for a prefix for said mobile terminal having moved to the visited network, forwarding an acquired prefix to said mobile terminal having moved to the visited network, and authenticating said mobile terminal, wherein the prefix is used, by said mobile terminal, to generate a second home address in said mobile terminal having moved to the visited network, wherein along with making a prefix acquisition request, said gateway also requests acquisition of Domain Name Server (DNS) server information from said home agent, and wherein said gateway forwards the acquired DNS server information along with said prefix to said mobile terminal having moved to the visited network. 18. An authentication method according to claim 17, further comprising: deciding, by said gateway equipment, whether or not authentication processing is required using a source address of the access request from said mobile terminal having moved to the visited network, and performing, by said gateway equipment, authentication processing when it is decided that authentication is necessary. 19. An authentication method according to claim 18, further comprising: holding, by said gateway equipment, the location information of said mobile terminal having moved to the visited network, and performing, by said gateway equipment, authentication processing after receiving a location registration request from said mobile terminal having moved to the visited network. 20. An authentication method according to claim 18, further comprising: holding, by said gateway equipment, said mobile terminal location information after said authentication was successful. 21. An authentication method for a mobile terminal used in a communication system which includes a home network installed with a home agent for holding mobile terminal location information of a mobile terminal, a visited network installed with a radio communications device for communicating with a mobile terminal, and gateway equipment in said visited network for forming an interface with said home network, the mobile terminal using a first home address in the home network, wherein said radio communication device forwards an access request from said mobile terminal having moved to the visited network to said gateway equipment, said authentication method comprising: making, by said gateway equipment, an acquisition request to said home agent for a prefix for said mobile terminal having moved to the visited network, forwarding an acquired prefix to said mobile terminal having moved to the visited network and authenticating said mobile terminal having moved to the visited network; acquiring, by said mobile terminal having moved to the visited network, said prefix from said gateway equipment and creating, by said mobile terminal, a second home address for said mobile terminal having moved to the visited network; and registering mapping information, with said second home address generated from said prefix and a mobile terminal identification information, in a Domain Name Server (DNS) server within a home network, or a visited network or relay network, wherein along with making a prefix acquisition request, said gateway equipment also requests acquisition of Domain Name Server (DNS) server information from said home agent, and wherein said gateway equipment forwards the acquired DNS server information along with said prefix to said mobile terminal having moved to the visited network. 22. An authentication method according to claim 17, wherein said communication system further includes a network management equipment connected to said home network and said visited network, wherein said home agent and said gateway equipment acquire programs and data from said network management equipment required for distributing the prefixes and authenticating mobile terminals.
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이 특허를 인용한 특허 (11)
Popoviciu, Ciprian P.; Ahmed, Adeel; Droms, Ralph E.; Asadullah, Salman; Sudan, Madhu; Hain, Anthony L., Controlling advertisement of management prefixes.
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