A Survey on ZigBee Communications Efficiency for Subway Additional Services

Subway transportation is very efficient in crowded cities. The subway infrastructure and interlocking equipment are exploited on a continuous basis and there remains short time intervals for revisions. A solution to this problem would be the usage of robotic carts, having different embedded sensors and capable of transmitting live data regarding different safety parameters measured. In this paper we investigate possible usability of ZigBee communications in tunnels for this application. A series of experimental tests have been performed in different conditions on M4 line in Bucharest subway mainline and comparative results are presented in this paper.