Multicast is essential for wireless sensor network （WSN） applications. Existing multicast protocols in WSNs are often designed in a P2P pattern, assuming small number of destination nodes and frequent changes in net...Multicast is essential for wireless sensor network （WSN） applications. Existing multicast protocols in WSNs are often designed in a P2P pattern, assuming small number of destination nodes and frequent changes in network topologies. In order to truly adopt multicast in WSNs, we propose a base-station model-based multicast, SenCast, to meet the general requirements of applications. SenCast is scalable and energy-efficient for large group communications in WSNs. Theoretical analysis shows that SenCast is able to approximate the Minimum Nonleaf Nodes （MNN） problem to a ratio of in IRI （R is the set of all destinations）, the best known lowest bound. We evaluate our design through comprehensive simulations and prototype implementations on Mica2 motes. Experimental results demonstrate that SenCast outperforms previous multicast protocols including the most recent work uCast.展开更多
基金supported by the National Natural Science Foundation of China under Grant Nos. 60433040 and 60736013the National Grand Fundamental Research 973 Program of China under Grant Nos. 2002CB312105 and 2006CB3030000the China 973 WSNs Joint Lab at Shanghai.
文摘Multicast is essential for wireless sensor network （WSN） applications. Existing multicast protocols in WSNs are often designed in a P2P pattern, assuming small number of destination nodes and frequent changes in network topologies. In order to truly adopt multicast in WSNs, we propose a base-station model-based multicast, SenCast, to meet the general requirements of applications. SenCast is scalable and energy-efficient for large group communications in WSNs. Theoretical analysis shows that SenCast is able to approximate the Minimum Nonleaf Nodes （MNN） problem to a ratio of in IRI （R is the set of all destinations）, the best known lowest bound. We evaluate our design through comprehensive simulations and prototype implementations on Mica2 motes. Experimental results demonstrate that SenCast outperforms previous multicast protocols including the most recent work uCast.
