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Opportunistic Routing With Congestion Diversity in Wireless Ad Hoc Networks
  • Opportunistic Routing With Congestion Diversity in Wireless Ad Hoc Networks

Opportunistic Routing With Congestion Diversity in Wireless Ad Hoc Networks

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Opportunistic Routing With Congestion Diversity in Wireless Ad Hoc Networks

While ensuring bounded expected delay, the problem of routing packets across a multi-hop network consisting of multiple sources of traffic and wireless links is considered. Each packet transmission can be overheard by a random subset of receiver nodes among which the next relay is selected opportunistically. Balancing the trade-off between routing the packets along the shortest paths to the destination and distributing the traffic according to the maximum back pressure is the main challenge in the design of minimum-delay routing policies.

The proposed system provides a systematic development of a distributed opportunistic routing policy with congestion diversity (D-ORCD) by combining the important aspects of shortest path and backpressure routing. D-ORCD uses a measure of draining time to opportunistically identify and route packets along the paths with an expected low overall congestion.

D-ORCD with single destination is proved to ensure a bounded expected delay for all networks and under any admissible traffic, so long as the rate of computations is sufficiently fast relative to traffic statistics.Opportunistic Routing With Congestion Diversity in Wireless Ad Hoc Networks.

The proposed system also provides a practical implementation of D-ORCD which empirically optimizes critical algorithm parameters and their effects on delay as well as protocol overhead. Realistic QualNet simulations for 802.11-based networks demonstrate a significant improvement in the average delay over comparable solutions in the literature.

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