基于时隙侦听的无线纳米传感器网络接入机制

摘要

Aiming at problem that sensor nodes of wireless nano sensor networks have low processing ability and low power consumption,present a sensor nodes access scheme based on time-slot interception.Time is divided into equal-length frames.Master control node achieves frame synchronization of all the nodes in the whole network by emitting frame synchronization signal.When a data transmission request arises,sensor node look for an idle time slot to send data by listening for each time slot. This scheme eliminates control information interaction process between the master node and access nodes,which is simple and easy to realize. frame period setting is also optimized,and an anti-collision method is proposed.Simulation results show that the proposed scheme can achieve high data throughput with low collision probability.%针对太赫兹无线纳米传感器网络节点处理能力弱,功耗低的问题,提出了一种基于时隙侦听的传感器节点接入方案.将时间划分成等长的帧,主控节点通过发送帧同步信号实现整个网络所有节点的帧同步.当传感器节点出现发送数据请求时,通过侦听每个时隙,寻找一个空闲时隙发送数据,省去了主控节点与接入节点间控制信息的交互,具有简单、易于实现的优点.优化了帧周期设定,并提出了一种避冲突方法.仿真结果显示:方案可以在冲突概率较低的同时,实现高数据吞吐量.