oCast: Optimal Multicast Routing Protocol for Wireless Sensor Networks

In this paper, we describe oCast, an energy-optimal multicast routing protocol for wireless sensor networks. The general minimum-energy multicast problem is NP-hard. Intermittent connectivity that results from duty-cycling further complicates the problem. Nevertheless, we present both a centralized and distributed algorithm that are provably optimal when the number of destinations is small. This model is motivated by scenarios where sensors report to a small number of base stations or where data needs to be replicated on a small number of other nodes. We further propose an extended version of oCast, called delay bounded oCast (DB-oCast), which can discover optimal multicast trees under a predefined delay bound. Finally, we demonstrate the advantages of our schemes through both theoretical analysis and simulations.

icnp09ocast.pdf
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In  Proceedings of the 17th IEEE International Conference on Network Protocols (ICNP 2009)

Publisher  IEEE Computer Society

Details

TypeInproceedings
Pages151-160
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