| Summary: | 碩士 === 國立成功大學 === 電機工程學系碩博士班 === 94 === Energy-efficient communication protocol is an important issue in wireless sensor networks. The well-known LEACH (Low-Energy Adaptive Clustering Hierarchy), a cluster method protocol, cluster heads aggregate the sensing data and transfer the aggregated data to base station. LEACH uses randomly rotation of cluster head to evenly distribute the energy load among the sensor nodes in the network
In LEACH, the real number of cluster heads may differ form the expect number of cluster heads. In this thesis, we propose an improved LEACH communication protocol to improve the cluster head selection algorithm, so that the number of cluster heads approaches the expect number of cluster heads. Finally, the simulation results of the continue model, all sensor nodes have data to transmit, and hot-area model, some sensor nodes have data to transmit demonstrate that the lifetime of the sensor network is extended.
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