A transmission control scheme for media access in sensor networks
Proceedings of the 7th annual international conference on Mobile computing and networking
Energy-Efficient Communication Protocol for Wireless Microsensor Networks
HICSS '00 Proceedings of the 33rd Hawaii International Conference on System Sciences-Volume 8 - Volume 8
Network correlated data gathering with explicit communication: NP-completeness and algorithms
IEEE/ACM Transactions on Networking (TON)
IEEE Communications Magazine
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This work addresses the uneven energy consumption problem in data gathering sensor networks where the nodes closer to the sink tend to consume more energy than those of the farther nodes. This energy unfairness can significantly shorten the life time of a sensor network. We propose a novel cross-sensor coding technique using On-Off keying which exploits (a) the trade-off between delay and bandwidth and (b) the network topology in order to reduce the overall energy consumption of the network, and to alleviate the problem of unequal energy consumption. We formulate our coding problem as an integer programming problem, and construct a number of codes based on different criteria. We show that using our proposed technique under certain assumptions, the energy consumption can be reduced significantly and the unequal energy consumption problem can be practically eliminated.