关键词: 无线传感器网络, 分簇, 能耗, 通信半径

Abstract:

This study focuses on how to optimize the communication radii of sensor nodes in hierarchically clustered sensor networks to minimize the total energy consumption. The energy model is E=a(d^α+c), where R denotes the range of sensor networks and K is the number of layers. When the radii of sensor nodes are fixed, the upper bound of the optimal radii of sensor nodes is proved to be  α c/(α-1)  if α=2,c≤4R², or if α=4, c≤4R²,K≤ 6 R. When the radii are adjustable and α=2, the radii are obtained by minimizing the average energy consumption layer by layer.

Key words: wireless sensor networks, clustering, energy consumption, communication radius