一种消除无线传感器网络簇间干扰的TDMA协议及实现

TDMA Scheduling Protocol and Implementation for Avoiding Inter-Cluster Interference of Wireless Sensor Network

针对基于簇路由的无线传感器网络的媒体接入控制层(MAC)存在的簇间干扰问题,提出了一种消除簇间干扰的时分多址(TDMA)调度协议。该协议通过各簇首监听和分析周边节点消息,生成TDMA调度表来消除簇间的干扰。该协议假设网络只有单一的物理信道,所以不依赖于特殊硬件,具有一定通用性。采用TinyOS软件平台和MICA2硬件平台来实现协议。通过测试协议的簇首生成情况、组网开销、组网丢包率和传感数据的正确传输率,可知协议减少了簇间干扰,并且具有一定的可靠性。

A time division multiple access （TDMA） scheduling protocol of avoiding inter-cluster interference （ICI） is proposed to solve the ICI of medium access control （MAC） in cluster-based wireless sensor networks （WSN）. Through each cluster-head snooping at the neighbor nodes＇ network-organizing packets and constructing the TDMA schedule based on these packets, the protocol can avoid ICI. The protocol is implemented in an assumed single-physical-channel network, thus its implementation does not depend on specific hardware, and has the advantage of generality. The implementation of the protocol is based on TinyOS software platform and MICA2 hardware platform. The generation of the cluster-heads, the networkorganizing cost, the network-organizing packet loss rate and the accuracy of sensing data transmission are tested, and the results show that the protocol can avoid the ICI and has moderate reliability.