中文摘要：

链路质量的预测对无线传感器网络上层协议设计尤为重要,它为上层协议选择稳定,高质量的数据传输链路提供了充分的判断依据,然而RSSI、LQI等链路质量量度却存在着不同方面的不足。针对这个问题,在RSSI、LQI、RNP、PRR原理分析和性能比较的基础上,运用WMEWMA对PRR进行平滑化处理,综合考虑链路中的不对称性,提出了一种基于SPRR的链路质量预测算法。实验证明,该算法在稳定性上比PRR量度有很大的提高,而且通过修改SPRR的参数值,可以对链路质量进行最优预测。

英文摘要：

The prediction of link quality is of great importance to the design of ULP in Wireless Sensor Networks.It has provided upper layer protocol an adequate judgment ground in choosing steady and high-quality date transfer link.Even so,various dissatisfactions have still been found in the quality measurement of link like RSSI,LQI.In view of this problem and based on the analysis and comparison between the principle and performance of RSSI,LQI,RNP,PRR,this paper makes smoothing treatment to PRR with WMEWMA,considers synthetically on the asymmetry of link,and proposes SPRR-based link prediction algorithm.It has proved that this algorithm has been greatly improved in stability compared to PRR measurement and throught revision on parameters of SPRR,link quality can be optimizedly predicted.