Partner node migration control unit and method

• US 20060227755A1
• Filed: 06/12/2006
• Published: 10/12/2006
• Est. Priority Date: 02/10/1992
• Status: Active Grant

• Current Assignee: Hiromi Wada, Takashi Yozawa, Tatsuya Ohnishi
• Original Assignee: Hiromi Wada, Takashi Yozawa, Tatsuya Ohnishi
• Inventors: Wada, Hiromi, Yozawa, Takashi, Ohnishi, Tatsuya
• Granted Patent: US 7,620,025 B2
• Time in Patent Office: Days
• US Class Current: 370/338
• CPC Class Codes: H04L 61/00 Network arrangements, protocols or services for addressing or naming
• CPC Class Codes: H04L 61/25 of the same type
• CPC Class Codes: H04L 61/2503 Translation of Internet protocol [IP] addresses
• CPC Class Codes: H04L 61/255 Maintenance or indexing of mapping tables
• CPC Class Codes: H04L 61/5007 Internet protocol [IP] addresses
• CPC Class Codes: H04L 61/5084 Providing for device mobility network addressing or numbering for mobility support in wireless networks H04W8/26; mobile IP H04W80/04
• CPC Class Codes: H04W 36/0011 for data sessions of end-to-end connection
• CPC Class Codes: H04W 36/0019 adapted for mobile IP [MIP]
• CPC Class Codes: H04W 4/18 Information format or content conversion, e.g. adaptation by the network of the transmitted or received information for the purpose of wireless delivery to users or terminals
• CPC Class Codes: H04W 60/00 Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration
• CPC Class Codes: H04W 8/04 Registration at HLR or HSS [Home Subscriber Server]
• CPC Class Codes: H04W 8/26 Network addressing or numbering for mobility support
• CPC Class Codes: H04W 80/04 Network layer protocols, e.g. mobile IP [Internet Protocol]
• CPC Class Codes: H04W 88/06 adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
• CPC Class Codes: H04W 88/16 Gateway arrangements

Abstract

Disclosed is a migration communication control device constructed to control a continuous communication between a mobile node and a node unaffected the mobile node'"'"'s migration. The migration communication control device comprises a first migration control unit, a second migration control unit on the mobile node, and a third migration control unit on the partner node. The first migration control unit comprises a packet transfer unit and an address post unit. The packet transfer unit receives a packet which was destined for an outdated address of the mobile node, generates a conversion packet which holds an updated address instead of the outdated address, and then transmits the conversion packet, while an address post unit transmits an address post message which indicates the updated address to the third migration control unit. The second migration control unit comprises a migration post unit and a packet resumption unit. The migration post unit transmits to the first migration control unit a migration post message which indicates the updated address when the mobile node migrates to another network while a packet resumption unit receives the conversion packet from both the first migration control unit and the third migration control unit and resumes an original packet from the conversion packet. The third migration control unit comprises a packet conversion unit which converts a destination address of a packet into the updated address, then transmits it to the mobile node.

Claims

1. A mobile node comprising:

(a) an address obtaining unit that obtains a temporary address that is assigned to the mobile node for each network to which the mobile node migrates;

(b) an address post processing unit that posts an address post message including the temporary address to a home migration host position control unit that manages addresses of the mobile node.

2. The mobile node of claim 1, wherein

after the address post message is posted, the temporary address is held, in correspondence with a home address that is et in advance, by an address hold unit.

3. The mobile node of claim 1, wherein

the address post message includes a flag that indicates a request for a response message that acknowledges that the address of the mobile node has been registered.

4. The mobile node of claim 1, wherein

the address post message includes a sequence field for making a correspondence with a response message.

5. The mobile node of claim 1, wherein

the address post processing unit receives a response message that is transmitted from a home migration host position control unit to acknowledge a reception of the address post message posted by the address post processing unit.

6. The mobile node of claim 5, wherein

the response message includes a field that indicates presence or absence of an error in registration of the address of the mobile node.

7. The mobile node of claim 1 further comprising

a transfer packet reception processing unit that performs a reception process if a destination address of the received packet is a temporary address assigned to the mobile node.

8. The mobile node of claim 7, wherein

the transfer packet reception processing unit extracts a noncapsulated data packet from the received packet, and supplies data contained in the extracted noncapsulated data packet to an upper layer processing unit.

9. The mobile node of claim 1 further comprising

a packet transmission processing unit that performs a capsulating process in which a header, which indicates a source address by a temporary address, to a noncapsulated data packet to be transmitted, and transmits a packet resulted form the capsulating process to the home migration host position control unit.