Method and apparatus for distance vector routing on datagram point-to-point links
CA 2053397 A1 · Owner: Harvey, George A. · Inventors: Harvey, George A.; Perlman, Radia J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A technique for distributing updated distance vectors used in routers, which are connected by pointto-point links having datagram service. Distance vectors are used by routers to route messages over the most desirable paths, but must be continually modified as a result of update messages passed between routers to reflect changes in network topology. Datagram service does not normally ensure that such update messages will reach other routers, but the technique of the invention uses unique sequence numbers on all information packets containing distance vector update messages, and achieves efficient and timely distribution of updated distance vector information with only a modest storage …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed October 11, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 11, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 11, 2013.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
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Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.