基于分组差错控制的轨道交通ATS信号可靠组播技术研究  

Research of reliable multicast technology for rail transit ATS signal based on grouping error control

作　　者：刘德欣 朱文杰 申桂成[2] 

机构地区：[1]北车建设工程有限责任公司,北京100078 [2]沈阳东软集团有限公司,辽宁沈阳110179

出　　处：《中国测试》2013年第6期104-106,113,共4页China Measurement & Test

摘　　要：为解决轨道交通中ATS信号组播丢包问题,拟定一种基于分组差错控制的可靠组播传输协议。该协议不需要路由器的支持,在每个接收节点都定义一个申请重传权值列表,根据组播丢包情况,动态更新接收节点的权值列表,从而为接收节点选择最佳的重传请求处理节点,以提高数据重传效率。仿真实验表明:在多个分组中,将该文所提出的基于分组差错控制的可靠组播传输协议应用于轨道交通中ATS信号仿真系统中,与传统的可靠组播传输协议相比,能有效减少差错修复时延,并提高系统整体的吞吐率。Facing to the packet loss problem of the ATS signal multicast for rail traffic, a reliable multicast transport protocol based on grouping error control was developed. The protocol needn’t to be supported by the router. A list of applications to retransmission weight values was defined at each receiving node. The receiving node weights list was dynamically updated according to the multicast packet loss situations, then the optimum retransmission request processing node for the receiving node was selected and the efficiency of data retransmission was improved. Simulation results show that when reliable multicast transport protocol based on packet error recovery proposed in this paper was used in the ATS signal rail transportation simulation systems,it can effectively reduce the error control latency and improve overall system throughput in several groups compared with traditional reliable multicast transport protocol.

关 键 词：ATS信号 可靠组播 权值列表 差错修复 

分 类 号：U292.9[交通运输工程—交通运输规划与管理] TN915.04[交通运输工程—道路与铁道工程]