基于区域通信的车车通信模型研究

The Research of Regional Communication Based on Vehicle-to-Vehicle Communication Model

摘要: 基于车车通信列控系统是以车为主体的下一代列控系统。与采用集中控制方式的基于车地通信列控系统相比，基于车车通信列控系统是一套分散自律的列控系统。列车以ATS发送的运营计划为基础，通过与其他列车通信，获取其运行方向、位置等信息，进行移动授权的计算，保证行车安全。受限于系统通信能力，列车不可能与其他所有列车建立通信，因此车车通信模型是基于车车通信列控系统的核心技术之一。针对车车通信模型，本文提出了基于区域通信的车车通信模型。基于区域通信的车车通信模型是以列车为中心，将线路进行区域划分，分为直接通信区域、间接通信区域和无通信区域。处于直接通信区域的列车间将建立物理通信连接，处于间接通信区域的列车通过其直接通信区域的列车进行速度、位置、运行方向等信息的传递，从而保证在列车能够获取到同一路径方向上至少两列车的信息的前提下降低系统的通信负载。通过实验室系统样机测试证明，本文提出的基于区域连接的车车通信模型能够在降低系统通信负载的情况下实现车车通信问题，为后续工程应用提供理论和技术支撑，具有实际的应用价值。

Abstract: Vehicle-Communication-Based Train Control System (VBTC) is one of the next generation train control systems based on the vehicle-to-vehicle communication. Unlike 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 regional communication based on Vehicle-to-Vehicle Communication model which divides all the trains into direct communication regional, indirect communication regional and no communication regional, according to their relative positions on the network. According to the regional defined, each train on the network can distinguish its direct communication trains, indirect communication trains, and no communication trains. By the proposed model so that it can communicate directly with its direct communication trains, communicate with its indirect communication trains via its direct communication trains. 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 verification results indicate that the model can resolve the challenging of the vehicle-to-vehicle communication in the VBTC system, supporting the development of the VBTC system theoretically and practically.