| Summary: | 碩士 === 國立聯合大學 === 資訊工程學系碩士班 === 105 === A wireless sensor network (WSN) consists of a great number of sensor nodes which are randomly deployed in a region of interest. Each sensor nodes are used to sense the useful and aggregate data with limited energy resources, than transmit it to the base station. Usually numerous of the sensor nodes are deployed in a large scale of sensor field, where the amount of data collected by nodes is very large, and it will increase the energy consumption for the transmission. Due to the limited energy in sensors, it would be difficult to recharge and replace the batteries in a large scale of WSN. Therefore an efficient data aggregation scheme is very important for WSNs. This study proposes a grid-based power efficient data aggregation protocol, or called GB-PEDAP. WSN will be divided into several cells by the grid infrastructure. Each cell will select a sensor node with the highest remaining energy as the cell head node. Then it will establish the tree structure to connected the cell heads by using the minimum spanning tree algorithm. This proposed scheme can avoid excessive energy consumption in the data transmission. Furthermore, it can evenly distribute the energy consumption. Simulation result show that the proposed scheme compare with the previous is more efficient to extend the lifetime of the wireless sensor network.
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