Router reachability verification in IPv6 networks
US7564801B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 17, 2004 |
| Grant date | Jul 21, 2009 |
| Priority date | — |
| Expiry date | Nov 23, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W80/04
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.