Tie-breaking in shortest path determination

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United States of America Patent

PATENT NO 8699329
SERIAL NO

13023823

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Abstract

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A consistent tie-breaking decision between equal-cost shortest (lowest cost) paths is achieved by comparing an ordered set of node identifiers for each of a plurality of end-to-end paths. Alternatively, the same results can be achieved, on-the-fly, as a shortest path tree is constructed, by making a selection of an equal-cost path using the node identifiers of the diverging branches of the tree. Both variants allow a consistent selection to be made of equal-cost paths, regardless of where in the network the shortest paths are calculated. This ensures that traffic flow between any two nodes, in both the forward and reverse directions, will always follow the same path through the network.

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Patent Owner(s)

  • RPX CLEARINGHOUSE LLC

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Allan, David Ottawa, CA 113 3768
Ashwood, Smith Peter Gatineau, CA 46 1346
Bragg, Nigel Waaton Colville, GB 72 3675
Chiabaut, Jerome Ottawa, CA 27 1091

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