关键词: 无线传感器网络, 能量空洞, 可调发射功率, 最短路径树, 网络生命时间

Abstract: Due to the many-to-one characteristic of the data collection in wireless sensor network(WSN), lack of original network coverage or failure to reach the sink node would often occur because of the early energy depletion, which would lead to the effect of energy holes. An ATPAEH algorithm was proposed which could solve the problem of energy holes. In the algorithm, the nodes were firstly classified into the threshold nodes and the sufficient nodes according to residual energy of each node. In succession, the threshold nodes were sent to the sink node using multi-hops through the shortest path tree, and the sufficient nodes were sent to the sink node directly after adjusting transmission power according to the distance of each corresponding node and the sink node. Finally, the experimental results demonstrated the performances advantage of the proposed algorithm through being compared with the MILD algorithm. With the proposed algorithm, the energy consumption of the network was effectively balanced and the energy-hole was avoided so that the lifetime of the entire network was prolonged.