H - Electricity – 04 – Q
Patent
H - Electricity
04
Q
H04Q 3/42 (2006.01) H04L 12/56 (2006.01)
Patent
CA 2053397
METHOD AND APPARATUS FOR DISTANCE VECTOR ROUTING ON DATAGRAM POINT-TO-POINT LINKS ABSTRACT OF THE DISCLOSURE A technique for distributing updated distance vectors used in routers, which are connected by point- to-point links having datagram service. Distance vec- tors 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 ser- vice does not normally ensure that such update messages will reach other routers, but the technique of the invention uses unique sequence numbers on all informa- tion packets containing distance vector update mes- sages, and achieves efficient and timely distribution of updated distance vector information with only a modest storage requirements. Unlike reliable service, which requires each message to be delivered exactly once and in the order sent, the invention allows subse- quent update messages to be delivered to the same neigh- boring router even if previous messages have not yet been received and processed. The invention also pro- vides for retransmission of unacknowledged distance vector information, but without the burden of having to store all transmitted packets until they are acknow- ledged. Figure 3.
Harvey George A.
Perlman Radia J.
Digital Equipment Corporation
Harvey George A.
Perlman Radia J.
Smart & Biggar
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