Distributed algorithms for multicast path setup in data networks
IEEE/ACM Transactions on Networking (TON)
Directed diffusion for wireless sensor networking
IEEE/ACM Transactions on Networking (TON)
The Impact of Data Aggregation in Wireless Sensor Networks
ICDCSW '02 Proceedings of the 22nd International Conference on Distributed Computing Systems
Determination of Aggregation Points in Wireless Sensor Networks
EUROMICRO '04 Proceedings of the 30th EUROMICRO Conference
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Energy consumption is one of the most crucial issues in wireless sensor networks since sensor nodes are commonly battery-driven. Recently, several aggregation methods have been proposed to save energy by reducing the number of transmissions from source to the sink. They assumed a single sink for aggregation of data. In this paper, we propose an aggregation scheme for wireless sensor networks with multiple sinks. In our scheme, each node caches the gradient information collected from its local neighbors to determine the aggregation point for merging data to be delivered to multiple sinks. The experimental results show that our scheme can reduce the number of transmissions and thus save the energy more than the greedy incremental tree scheme and the shortest path scheme.