A Energy Conservation Scheme to Maintain Data Aggregation Tree in Sensor Networks

The lifetime of sensor nodes increases mainly in proportion to limited battery capacity in wireless sensor networks. All sensor nodes must reduce energy consumption for maximizing network lifetime. The part of the most energy consumption in the wireless sensor networks is wireless transmission part. Many researches that minimize energy consumption of wireless transmission part are progressing to maximize lifetime of sensors. Especially, the aggregation tree method accomplishes the undertaken job to use that a few representative sensor nodes cover all area. If one of representative sensor nodes occurs break down by battery exhaustion, fault tolerance is achieved by the algorithm that new one replaces old one. Although multiform algorithms have proposed for it, those have the problem that all sensor nodes take unnecessary battery consumption for periodical message transmission due to fault tolerance. This paper proposes an epochal saving mechanism for reducing battery consumption in fault tolerant process