累积链路质量无线传感器网络路由算法研究

针对无线传感器网络链路特点，在实验基础上，引入底层通信链路质量参数指示LQI，改进ETX，提出一种新的基于累积链路质量的无线传感器网络路由算法。算法利用累积链路质量作为路由选择的标准，避免大量探测包的使用，并且为信道编码的负载添加提供了准确依据，减少冗余和能量消耗。仿真实验结果表明，该算法能有效提高数据传输吞吐量和路径有效利用率、减少节点传输压力，平衡网络负载及延长网络生存时间。

Cumulative link quality routing algorithm research on WSN

Based on Link Quality Indicate appearance and experiment results,a novel routing algorithm is provided to meet the characters and requests of wireless sensor network.The proposed algorithm improves ETX and uses cumulative link quali- ty to be the routing choosing metric.For avoiding probe packets used,it decreases the redundancy and sensor motes power consuming by utilizing LQI to attain the link quality.Meanwhile,it helps erasure channel code add overhead accurately.Simula- tion results exhibit that it can significantly improve throughput,path efficiency and reduce node transmission pressure.It also can balance the network load and extend the surviving time.