无线传感器网络TTDD协议的研究与改进

无线传感器网络中路由协议的研究是一个重点，特别是如何在路由协议中解决汇聚节点的移动性和延长网络生命期的已成为研究热点。该文首先研究和分析了双层数据分发协议TTDD，介绍了TTDD基本原理，然后作者基于TTDD的不足提出了改进算法和模型，最后用Madab进行性能分析，结果表明，改进后的算法有效的缩短了消息和数据包转发路径，节省了能量开销，延长了网络生命期，同时，该算法具有良好的可扩展性。

An Improvemnt on TTDD for Wierless Sensor Networks

In the fields of WSNs, how to deal with the movement of sinks and prolong the lifecycle are some hot spots. Firstly, this paper makes a study and analysis on the two-tier data dissemination algorithm （TTDD） and introduces its basic principles. Then, we bring a improved algorithm and model based on the lack of TTDD. In the end, we give a performance analysis with Matlab, the result shows that the improved algorithm shortens the transmit path effectively, saves energy costs and prolongs the network tifecycle, at the same time, the improved algorithm holds the characteristic of expansibility.