能量有效的无线传感器网络数据收集协议

Energy efficient data collection protocol for wireless sensor networks

针对无线传感器网络(wireless sensor networks,WSNs)中数据收集易丢失的特点,提出了一种能量有效的数据收集协议。该协议引入链路质量门限来构造骨干投递网,提高链路可靠性。在构造算法中分配的核结点和非核节点分别采用2种不同的时隙调度表来进行数据传输,该调度算法让暂时不参与数据传输的节点进入睡眠模式,降低节点能量消耗。协议采用管道投递(pipeline delivery)模式进行数据传输,避免传输过程中的互干扰。TOSSIM实验仿真表明,与CTP(collection tree protocol)协议相比,该协议在不计算睡眠调度算法获得的能量增益情况下,仍获得较好的传输开销和更高的能量利用率,减小了网络整体能耗。

Aiming at the problem of packet loss during data collection in wireless sensor networks （WSN）, this paper pro- poses an efficient data collection protocol. This protocol eonstructes a backbone delivery network by utilizing the threshold of link, which can improve the reliability of link. The core nodes and non-core nodes constructed by this algorithm use two kinds of sleep scheduling strategy to deliver data packet respectively, which can save much energy by making the nodes for sleep mode as far as possible. Meanwhile, this protocol can also avoid self-interference by exploiting the method of pipeline data delivery. The simulation results in TOSSIM show that the proposed protocol, compared with CTP protocol, obtains better delivery cost and improves the whole energy efficiency of network, although excluding the gain from the sleep scheduling algorithm.