中文摘要：

无线传感器网络是由传感器节点和汇聚节点组成的以数据为中心的无线网络.汇聚节点根据一个或多个源节点传送的采集数据对事件进行监测和判断,而数据传输的可靠性直接影响到监测和判断的准确性.在无线传感器网络中,一方面,网络拓扑结构是动态变化的,数据传输的可靠性与网络拓扑结构有关;另一方面,网络中的传感器节点是能量受限的,因此传输的可靠性还与节点的能量密切相关.针对无线传感器网络的特点,给出了无线传感器网络的传输可靠性概念,提出一种传输可靠性度量,分别在有数据融合和无效据融合两种情况下,对网络节点的能耗情况进行了分析,获得了网络节点正常工作的概率随时间的变化关系,并导出数学表达式,用于计算节点所产生的数据包成功传输给汇聚节点的概率,从而获得了求整个网络传输可靠性的计算方法.

英文摘要：

Wireless Sensor Networks（WSNs）are data based systems which consist of sink and sensor nodes.Reliable event detection at the sink is based on one or several source nodes. Hence,the transmission reliability of data affects the event detection and estimation directly. In WSN,on one hand,the network topology is dynamically various,so the transmission reliability of data is related to the network topology;on the other hand,sensor nodes are energy limited,so the transmission reliability is also closely related to the energy of sensor nodes.Aiming at the characteristics of WSN,the transmission reliability conception and a measure to evaluate the transmission reliability of WSN is proposed.By analyzing the energy consumption of sensors in transmitting with and without data aggregation respectively,the probability function of a node that works normally with the time varying is achieved,and a method for calculating transmission reliability in WSN by analyzing the energy consumption of sensor nodes is introduced.