The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 09, 2009
Filed:
Jun. 27, 2002
Daichi Funato, Mountain View, CA (US);
Carl Williams, Palo Alto, CA (US);
Atsushi Takeshita, Sunnyvale, CA (US);
Daichi Funato, Mountain View, CA (US);
Carl Williams, Palo Alto, CA (US);
Atsushi Takeshita, Sunnyvale, CA (US);
NTT DoCoMo, Inc., Tokyo, JP;
Abstract
A geographically adjacent access router discovery system discovers geographically adjacent access routers through a distributed process in which mobile node(s) associated with a current access router may receive beacon signals from geographically adjacent access points. A link layer ID included in the beacon signals may be used by the system to identify corresponding geographically adjacent access routers. Network layer addresses of geographically adjacent access routers may be mapped to corresponding link layer IDs and cached by the system. The cache may be used to identify a network layer address from the link layer ID received in a beacon signal.