城市轨道交通综合监控系统的实时性设计

综合监控系统的实时性指标是评价系统性能优劣的重要指标,其性能直接影响地铁运营调度的质量.通过对城市轨道交通综合监控系统核心平台及其集成子系统网络结构的分析,构建了一个度量系统实时性的分析计算模型.以该模型为基础,分析研究网络拓扑结构、数据通信机制等因素对系统实时性的影响,并提出了优化系统实时性设计的措施:尽量减少网络层级,推荐集成子系统与综合监控系统核心平台一体化设计;均衡分配每个数据传递路径中低速数据通信设备的数量;根据各层级网络实时数据的容量和网络传输能力,合理确定各层级网络的数据通信机制,底层网络可采用轮询方式,上层网络可采用变化数据主动上传方式;合理提高网络设备的性能,避免通信瓶颈.

Real-time Property Design of the Integrated Supervisory Control System for Urban Mass Transit

Real-time property index of the integrated supervisory control system is a key indicator to evaluate the performance of a system and also an influential factor over the quality of subway operation.After analyzing the core platform and sub-systems of the integrated supervisory control system (ISCS) for urban mass transit(UMT),this paper builds up a model to measure its real-time property.Based on this model,the paper analyzes the factors which influence the real-time property of ISCS,like the network topolog...