摘要
在无线传感器网络中,部分传感器节点由于担任过多数据中转任务,需要消耗较多的能量,使其过早死亡,缩短了网络的寿命。本文提出基于sink节点移动的策略,将感知区域分割成有限个虚拟单元格,并以每个虚拟单元格的中心作为sink节点的备选移动位置。然后,通过解线性规划问题确定sink节点的移动位置和停留时间。通过此方法,在一定程度上均衡了传感器节点的负载,延长了网络寿命。
In wireless sensor networks, sensors taking on forwarding data consume much more energy and die earlier than others, so the lifetime of the networks is shortened sharply. This paper proposes a strategy based on sink mobility, which divides interest region into finite virtual cells, and these cells consist of optional positions set for sink mobility. Then it decides the best sink mobility positions and sojourn time by work out a linear programming problem. By this way, the loads on sensors are balanced to some extent, and the lifetime of the networks is prolonged.
关键词
无线传感器网络
网络寿命
负载均衡
虚拟单元格
线性规划
wireless sensor networks
networks lifetime
load-balancing
virtual cells
linear programming
