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:
Jul. 21, 2009
Filed:
Aug. 17, 2004
Sathya Narayanan, Plainsboro, NJ (US);
Sathya Narayanan, Plainsboro, NJ (US);
Panasonic Corporation, Osaka, JP;
Abstract
A method of router reachability verification for hosts in computer networks such as IPv6 networks is presented where hosts transmit router solicitations including information identifying a current router, and possibly one or more previous routers. A router that receives the router solicitations may then determine if it is the current router or one of the previous routers from the router solicitation information. If a router receiving the router solicitation is the current router, it waits a first delay before transmitting a router advertisement (RA). If the router is not a current router, it waits a second, longer delay. Accordingly, hosts may receive RAs from their current router before any other routers, thereby preventing unnecessary hand-offs. Also, RAs may include target host addresses so that hosts receiving the RAs may be aware of router reachability and avoid attempting to configure to undesirable routers.