The modeling and analysis of data communication system (DCS) in communication based train control (CBTC) with colored petri nets

Communication Based Train Control (CBTC) system will be based on mobile communication and overcome fixed blocks in order to increase track utilization and train safety. As an Intelligent Autonomous Decentralized Systems (IADS), Data Communication System (DCS) between trains and Zone Center (ZC) are crucial factors for the safe and efficient operation of CBTC system. The real-time behavior under various transmission conditions needs to be modeled and evaluated The paper presents a DCS model and evaluates the influence of communication collision and message length on the transfer delay. Performance evaluation of the Coloured Petri net model shows that the communication collision caused by two trains in one cell does not result in the unacceptable train operation situations. But the message length may have much influence on the transfer delay.