中文摘要：

无线传感器网络是由大量传感器节点组成的自组织网络，具有密集性和随意分布的特点，可实现恶劣环境下的数据监测。根据网络的逻辑结构，可将面向WSN的路由协议分为平面路由和分层路由两种。典型的分层路由协议是LEACH协议和PEGASIS协议。树型无线传感器网络路由协议REET是在LEACH算法的基础上的改进，该协议可以有效降低节点能耗，使能耗均匀地分布在整个网络。

英文摘要：

The wireless sensor networks is self--organized networks being composed of large number of sensor nodes and distributed randomly, which allows users to accurately monitor a＇severe environment. This paper introduces and analyzes two typical routing protocols and proposes a new reliability and energy--efficient tree routing protocol for WSN . REET.