Route optimization technique for mobile IP

• US 20020080752A1
• Filed: 12/22/2000
• Published: 06/27/2002
• Est. Priority Date: 12/22/2000
• Status: Active Grant

• Current Assignee: Mind Fusion, LLC (Ascend Innovation Management, LLC)
• Original Assignee: Interactive People Unplugged AB
• Inventors: Forslow, Jan, Johansson, Fredrik
• Granted Patent: US 7,333,482 B2
• Time in Patent Office: Days
• US Class Current: 370/338
• CPC Class Codes: H04L 45/54 Organization of routing tables
• CPC Class Codes: H04L 61/2514 between local and global IP addresses
• CPC Class Codes: H04L 61/2517 using port numbers
• CPC Class Codes: H04L 61/2564 for a higher-layer protocol, e.g. for session initiation protocol [SIP]
• 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: H04L 63/0823 using certificates cryptographic mechanisms or cryptographic arrangements for entity authentication involving certificates H04L9/3263
• CPC Class Codes: H04L 67/1001 for accessing one among a plurality of replicated servers
• CPC Class Codes: H04L 67/10015 Access to distributed or replicated servers, e.g. using brokers
• CPC Class Codes: H04L 67/1006 with static server selection, e.g. the same server being selected for a specific client
• CPC Class Codes: H04L 67/1014 based on the content of a request
• CPC Class Codes: H04L 69/164 Adaptation or special uses of UDP protocol
• CPC Class Codes: H04L 9/40 Network security protocols
• CPC Class Codes: H04W 40/36 due to handover
• CPC Class Codes: H04W 8/082 for traffic bypassing of mobility servers, e.g. location registers, home PLMNs or home agents
• CPC Class Codes: H04W 80/04 Network layer protocols, e.g. mobile IP [Internet Protocol]

Abstract

The present invention relates to mobile data communications in general, and more specifically, the present invention describes a route optimization technique requiring no awareness of the Mobile IP protocol by a Correspondent Node when forwarding traffic using the shortest path between a Mobile Node and the Correspondent Node in a visiting domain. The invention describes the management of route entries, network address translations and firewall filters in order to provide a secure, yet, flexible deployment of Mobile IP route optimization. Specific considerations are described for the case of separate Foreign Agent and co-located care-of address respectively.

Claims