摘要
针对传感器网络能源有限的特征,提出一种适用于传感器网络的链路报文丢失率测量方法。根据在汇聚节点(sink)获取的网络数据报文,将链路报文丢失率推测形式化为MLE问题并用EM算法解决推测问题。仿真试验证明,算法在不增加网络负担的前提下,能够有效地推测链路的报文丢失率;随着网络规模的扩大,算法仍能准确地反映网络内部的链路性能。
Due to the inherent stringent bandwidth and energy constraints,a link loss rate inference method applied to wireless sensor network is proposed.According to the sequence of data loss/receipt collected in the sink,the problem is formulated as a Maximum-Likelihood Estimation problem and is solved using the Expectation-Maximization algorithm.Simulation resuits demonstrate that the proposed methodology can infer the loss rate of packet accurately without any burden on network, and scale to networks size.
出处
《计算机工程与应用》
CSCD
北大核心
2010年第29期86-88,共3页
Computer Engineering and Applications
基金
2010安徽省级高校自然科学研究项目(No.KJ2010B002)
