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About the session
Vehicle-Communication-Based Train Control System (VBTC) is one of the next generation train control systems based on the vehicleto- vehicle communication. Unlick the traditional centralized train control systems which are based on the bidirectional communications between the on-board controller and wayside controller, the VBTC system is a decentralized train control system where train operation is self-disciplined by the on-board controllers. Based on the operation plan scheduled by the ATS,
the on-board controller of a VBTC system obtains and calculates essential information, such as the train moving direction, speed and position data, and movement authority (MA), protecting the safety movements of train. Limited by the communication capacity of the radio communication system, communication with all the other on-board controllers in the network at the same time is unachievable. Therefore, we propose a vehicle-vehiclecommunication
model which divides all the trains into Direct Relation Trains (DRT), Indirect Relation Trains (IRT) and None
Relation Trains (NRT), according to their relative positions on the network. Each train on the network can distinguish its DRTs, IRTs, and NRTs by the proposed model so that it can communicate directly with its DRTs, communicate with its IRTs via its DRTs, and not communicate with its NRTs. As a result, a train can at least acquire information of two trains in one direction on the network without overloading the radio communication system. The vehicle-to-vehicle communication model is verified on our engineering prototype of a VBTC system. The verification results indicate that the model can resolve the challenging of the
vehicle-to-vehicle communication in the VBTC system.
