民航机场特种车辆监控网络MAC层节能设计

Energy saving algorithm on MAC for civil aviation airport special vehicles monitoring network

针对机场特种车辆监控系统在现场测试中能量消耗快所造成的定位计算精度和实时性下降等问题,在原有网络MAC层基础上,提出了一种基于网络环境、电池和车辆状态监测的对超帧占空比动态控制的网络能量优化方法,是一种闭环控制。利用OPNET软件建立场景进行网络仿真,结果表明,基于此方法设计的网络协议较原MAC协议在延长网络生命周期、优化网络性能方面都有显著提高,解决了实际应用问题。

With the existing MAC layer protocol, a closedloop dynamic control over the duty cycle of the superframe in energy optimization based on network state and working condition monitoring is proposed considering the problem of excessive energy consumption, which leads to descending the positioning accuracy and realtime issues in the test of airport special vehicle monito ring system. With the scenarios created by OPNET network simulation software, the analysis on simulation result indicates that the optimized network protocol performs remarkablely better than the original one in prolonging the life span of network, and many other indicators. Therefore, the optimized mechanism is a better solution to the practical applications.