TinyDB: an acquisitional query processing system for sensor networks
ACM Transactions on Database Systems (TODS) - Special Issue: SIGMOD/PODS 2003
Radio Sleep Mode Optimization in Wireless Sensor Networks
IEEE Transactions on Mobile Computing
Mobile Sampling of Sensor Field Data Using Controlled Broadcast
IEEE Transactions on Mobile Computing
Energy-Efficient Wake-Up Scheduling for Data Collection and Aggregation
IEEE Transactions on Parallel and Distributed Systems
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This paper proposes an energy-efficient sensor node control mechanism to prolong sensor networks' lifespan by minimizing and equalizing energy consumption of sensor nodes. The proposed scheme newly defines three operational modes of a sensor node, which are normal, power-saving, and inactive. When the remaining energy of a sensor node is lower than the average remaining energy of all sensor nodes in the same network or cluster, it operates in the power-saving or inactive mode. This makes it possible to minimize and equalize energy consumption of each sensor node. The proposed mechanism additionally includes another scheme to prevent a sensor node transmitting duplicate sensed data. When a sensor node takes sensed data, it compares them with pre-sensed data to decide their duplicity. This makes it possible to avoid unnecessary energy consumption caused by transmitting duplicate sensed data. We implemented and simulated the proposed schemes with TinyOS and NS-2, respectively. The simulation results show that the proposed mechanism can efficiently reduce and equalize energy consumption, and therefore prolong sensor networks' lifespan.