用于无线监控的ZigBee多跳网络时延分析

Analysis on the Delay of Multi-hop Wireless Network of ZigBee Applied to Wireless Supervising

为证明多跳自组的ZigBee网络在船舶自动化监控中的应用价值,以及这种分析方法在无线监控应用方面的可行性和通用性,建立一个实际的多跳无线网络,测量其无线数据包的各跳时延,在满足工控实时应用的条件下,进行无线网络实时测量性能的仿真和优化。结果表明,应用于无线监控的ZigBee网络具有30跳以内网络深度的扩展能力,并且在降低数据包等待时延和提高无线数据采样率时,ZigBee网络的低时延特性更加明显。

In order to prove sufficient merits of multi-hop and ad-hoc ZigBee network,and the feasibility and universality of this analysis way in automatic supervising application,a real multi-hop wireless network was built,and the transmission delay of the wireless packet was measured in different number of hops in the network.With the premise of real-time characteristics in the industrial control application,the real-time performance of the wireless measuring network was simulated and optimized.The results showed that the ZigBee network oriented to wireless supervising should be designed to be less than 30 hops and the short-delay advantage of ZigBee network was more evident when decreasing the waiting delay of packets and increasing the sampling rate of wireless data.