端到端IP组播技术及其在PIS中的应用  

End-to-end IP Multicast Technology and Its Application in Passenger Information System

作　　者：孙大为[1] 曲博[2] 李晓[2] 江早[1] 常桂然[1] 

机构地区：[1]东北大学信息科学与工程学院,沈阳110004 [2]沈阳地铁有限公司,沈阳110011

出　　处：《计算机工程》2010年第16期232-233,236,共3页Computer Engineering

基　　金：沈阳地铁一号线通信基金资助项目(D1/ZBSB-2007-003);辽宁省自然科学基金资助项目(20042042)

摘　　要：针对IP组播在网络层中使用UDP协议不能有效保证数据可靠传输的问题,提出一种高效、稳定的在端系统间保证数据可靠传输系统。使用CRC-32、端到端差错恢复和端到端拥塞控制等关键技术。该技术成功应用于沈阳地铁乘客资讯系统(PIS)。测试结果表明,该系统保持IP组播技术节省带宽资源、提高数据传输效率等优点,保证了数据的可靠传输。Aiming at the problems that IP multicast depending on UDP protocol in the network layer can not guarantee reliable transmission,an end-to-end reliable transmission system with the properties of high-speed,high efficiency and stability to all kinds of application is proposed,the key technologies include CRC-32,end-to-end error recovery,end-to-end congestion control and so on.It is successfully applied in Passenger Information System（PIS） of Shenyang subway.The implementation of end-to-end reliable transmission system is tested and analyzed.Test results indicate that the system can guarantee reliable transmission among the end-to-end systems,as well as maintaining the advantages of saving network bandwidth resources and improving the data transmission efficiency in IP multicast.

关 键 词：IP组播 可靠传输 差错恢复 拥塞控制 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]