| 摘要 |
This invention relates to a method to effect hop-by-hop routing in a network segment where different nodes have different views of the network topology. In particular, the methods of this invention are applicable when each node in a network or network segment may be aware of only a subset of the communication links in the network, without perceiving other communication links. Based on each node's individual view of the network, the method introduces the concept of a visibility set that includes all visible communication links. More specifically, an efficient algorithm is disclosed for searching for a family of one-to-all optimal feasible paths in communication network where different nodes may have different views of the network topology. The algorithm comprises (a) restricting the set of available paths to a destination node to the set of feasible paths from the source node to the destination node; and choosing as the optimal route the feasible path which has the lowest cost, wherein a path is a feasible path if (i) the path does not contain a cycle, and (ii) for each intermediate node visited by the path, the subpath from that intermediate node to the destination node is visible from the intermediate node.
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