一种无线传感网的Sink节点移动路径规划算法研究

为寻找传感节点均匀分布时Sink节点的最优移动路径和最大网络生存时间,提出一种无线传感网的Sink节点移动路径规划算法(MPOA).在MPOA算法中,将Sink节点的数据收集范围分解成多个圆环,将监测区域分解成多个网格.根据Sink节点的停留位置和多跳通信方式,采用数学公式表示每一个网格的单位节点能耗,从而获得Sink节点移动的网络生存时间优化模型.采用修正的混合粒子群算法求解该优化模型,获得网络生存时间、Sink节点的停留位置和移动路径的最优方案.仿真结果表明:MPOA算法可寻找到Sink节点的最优移动路径,从而平衡网络能耗,提高网络生存时间.在一定的条件下,MPOA算法比Circle,Rect和Rand算法更优.

Study on the Movement Path Optimization Algorithm of Sink Node for Wirless Sensor Networks

To find the optimal movement path of Sink node and maximum network lifetime when sensor nodes were uniformly distributed,movement path optimization algorithm( MPOA) of Sink node for mobile sensor networks was proposed. In the MPOA algorithm,data collection range of Sink node was divided into multiple rings,and the moni-toring area was divided into multiple grids. According to positions of Sink node and multi-hop communication,unit node energy consumption of each grid was expressed by mathematical formula, and network lifetime optimization model with mobile Sink node was obtained. Modified hybrid particle swarm optimization algorithm was adopted to solve the optimization model. Optimal scheme of network lifetime,sojourn positions and movement path of Sink node was obtained. Simulation results show that MPOA algorithm can find the optimal movement path of Sink node,bal-ance network energy consumption and prolong network lifetime. Under certain conditions,MPOA algorithm outper-forms Circle,Rect and Rand algorithms.