基于LED光通信的按需路由协议实现

Implementation of On-Demand Routing Protocol Based on LED Light Communication

目前LED(Light Emitting Diode)光通信协议仅局限于点对点的短距离通信,为了延长室内点与点之间的通信距离,设计了基于按需路由算法的光通信协议,并组建了自组织自恢复室内无线局域网系统。对室内两节点经过两次路由选择的通信过程进行了仿真验证与系统测试。结果表明,收发单元使用点对点半双工可靠通讯方式,测试两节点间通讯速率达到30 bit/s,实现了光照空间范围内传感数据的自适应路径选取与可靠路由传输,通信距离约是点对点短距离直接通信的3倍。

The LED（Light Emitting Diode）light communication protocol is currently limited to point to point short-distance communication,in order to improve the communication distance between indoor points,a light communication protocol based on the on-demand routing algorithm is designed,setting up a self-organizing and self-healing wireless LAN（Local Area Network） indoor system.Simulation experiment and system testing is performed in the communication process between two indoor nodes after twice routings.Transceiver unit uses a point-to-point half-duplex reliable communication.In the experiment,the communication rate is up to 30 bit/s and communication distance is about as three times as the direct communication,we find that the communication system based on this protocol can achieve the reliable routing path selection and adaptive transmission of sensor data in the space taht the light can illuminate.