| Summary: | 碩士 === 靜宜大學 === 資訊管理學系研究所 === 96 === Recent advances in wireless communications and micro-electronics have enabled the development of small, low-cost sensor nodes for applications of surveillance or target tracking. In general, a wireless sensor network is composed of several sinks and a large number of sensor nodes.
Every node in the network sensing area is limited in power supply, computational capacities, and memory. Under these constraints, no sensor node is able to perform complex operations alone. Macroscopic functions of the entire network are accomplished via the cooperative operations of sensor nodes. To accomplish the complicated functions such as message routing or target tracking, sensor nodes may apply some self-organization strategies. Self-organization, in our definition, means that all works are done via the exchanges of simple messages among sensor nodes and simple computations performed in sensor nodes. In this thesis, we propose a series of self-organization strategies for sensor nodes to obtain their logical address, route messages to sinks, and decide its sleep schedule. Experimental results show that, these simple self-organization strategies can achieve high degree of energy-saving without losing the sensing coverage or losing messages.
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