传感器网络节点数目算法的比较研究

Comparison between node number algorithms in wireless sensor networks

节点数目的确定问题直接影响着网络的运行成本和工作效率,是传感器网络研究中一个基本的研究课题。介绍并分析了基于瞬时和长时两种不同感应模型的节点计算算法,即基于调度的节点数量确定算法和基于暴露量的节点数量确定算法,给出了覆盖滑动窗口的概念,归纳出两种算法在精度、性能指标和应用范围等方面的差异,得出两种方法均能有效确定满足覆盖节点数目的门限值,只是各自的覆盖滑动窗口的尺寸有所不同的结论。

The number of node in wireless sensor networks is an important research topic,which directly affecte the cost and efficiency of network operation.This paper introduced the two different algorithms named the sensor number based on schedule and sensor number based on exposure,which were based on instantaneous and long-time sensing models,and gave the conception about the covering sliding window.It generalized the differences between the two methods,such as the accuracy,the algorithm performance and the application scope.Conclusions were drawn,that the two algorithms both could effectively obtain the threshold numbers meeting the coverage demands but these windows＇dimensions are distinct.