Fast handoff using GPS technology for mobile telematics

• US 8,718,066 B2
• Filed: 06/17/2010
• Issued: 05/06/2014
• Est. Priority Date: 03/29/2004
• Status: Expired due to Fees

• Current Assignee: Telcordia Technologies Incorporated (Telefonaktiebolaget LM Ericsson), Toyota Motor Corporation
• Original Assignee: Telcordia Technologies Incorporated (Telefonaktiebolaget LM Ericsson), Toyota Motor Corporation
• Inventors: Dutta, Ashutosh, Chen, Wai, Altintas, Onur, Madhani, Sunil, Suwa, Yoshihisa, Cai, Shengwei
• Primary Examiner(s): Zhu, Alvin
• Application Number:
  US12/817,427
• Publication Number:
  US 20100254350A1
• Time in Patent Office: 1,419 Days
• Field of Search: 370/329, 370/331, 370/395, 370/3, 370/395.31, 370/395.54, 455/435.1, 455/436, 455/437, 455/438, 455/439, 455/440, 455/443, 455/444, 455/445, 455/446
• US Class Current: 370/395.2
• 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 36/14 Reselecting a network or an air interface
• CPC Class Codes: H04W 64/00 Locating users or terminals or network equipment for network management purposes, e.g. mobility management
• CPC Class Codes: H04W 8/26 Network addressing or numbering for mobility support
• CPC Class Codes: H04W 80/00 Wireless network protocols or protocol adaptations to wireless operation
• CPC Class Codes: H04W 80/04 Network layer protocols, e.g. mobile IP [Internet Protocol]

Abstract

The present invention relates to the reduction of handoff delays for mobile telematics applications. In particular, the present invention provides a method employing GPS technology to define IP addresses in a mobile environment in order to reduce delays and transient data loss caused by handoff from one network to another.

Claims

1. A method of storing a list of available IP addresses in a mobile coverage area, said method comprising:

providing an information gateway server having a GPS device and associated with said mobile coverage area, said information gateway server enabled to gather IP address information from mobile and non-mobile devices, and from neighboring information gateway servers in a new coverage area and storage means for storing a list of available IP addresses in said mobile coverage area in accordance with said gathered IP address information and with data from the GPS device; and

dynamically updating said list of available IP addresses maintained by the information gateway server.

2. A method according to claim 1, wherein said step of dynamically updating comprises performing an address conflict resolution process on said available IP addresses.

3. A method according to claim 2, wherein said address conflict resolution process comprises obtaining ARP-cache information from neighboring routers within the mobile coverage area.

4. A method according to claim 3, wherein said ARP-cache information from neighboring routers is obtained using SNMP.