WSNs断网情况下汇聚点选取与优化研究

Research on selection and optimization of collection points in WSNs under condition of broken network

无人值守的无线传感器网络(WSNs)在严酷环境中易出现断网情况,数据的传输受到限制,造成网络不可用。利用移动Sink访问汇聚点(CP)收集数据是一种有效的解决方案。但现有的研究中没有明确给出最佳CP的存在区域和CP的选取对Sink节点移动路径的影响。为此,提出了最佳CP存在区域的划分方法,并确定了该区域大小。在含有100个节点的WSNs上进行仿真验证,结果表明:该划分方法下Sink节点最优移动路径的变化呈单调递减,并最终趋于稳定。

Wireless sensor networks （WSNs） that operates unattended in extreme environmental conditions may off the Internet and data transmission is restricted, which make WSNs unavailable. Use mobile sink visit collection points（CP） and collect datas is an effective solution. However, the existing studies do not give solution of how to select the optimum CP and its impact on moving routes are not given. So, present a partition method to find the area where optimal CP placed and ascertain that area size. Simulation test on WSNs that contains 100 nodes is carried out and its results indicate variation of the optimal moving route of sink node is monotone decreasing until stable by this partition method.