Measure Of OTN Equipments And Optimization Of The Railway Transport Network

Recently with the increasing of railway new service demand, such as: integrated video surveillance, Internet ticketing, real-name ticketing etc. Railway optical transport network bandwidth and large particles business demand has increased dramatically. The safe, rapid, efficient operation mode of the high-speed railway and the passenger railway lines put forward higher requirements for railway communication network. In addition, with the application of the new optical transport technology and its OTN node equipment, railway transport network topology develops from chain and ring topologies structures to the mesh one. As information carrier network of railway communication, railway transport network carries information such as driving, scheduling, video monitoring, ticketing, mobile communications, emergency communication. Network components failure can lead to data transmission interrupt, therefore causes huge economic loss and potential security risks. In the12th five-year plan of the railway, the railway transport network is facing a new round of expansion and upgrade, the author has the honor to participate in the key topics’interconnection technology research and the application of Optical transport network in railway’, participates in interconnection testing and transport network optimization.This paper’s main work is as follow:1. Testing of OTN equipment from different manufacturers in railway transport network expansion and upgrade, in order to ensure that the railway transport network’s safety and responsibility on equipment and system level. Test data provides strong support for the transformation of the future railway OTN network.2. Railway transport network survivability design under static demand. Firstly, basing on railway transport network fault analysis, this paper chooses dedicated path protection and shared path protection to ensure network survivability. Secondly, this paper analyzes the deficiencies of traditional routing algorithm, then propose MTW algorithm, which takes consideration of routing problem and resource consumption. Simulation result shows that the algorithm effectively avoids routing failure with high resource utilization.3. Railway transport network survivability design problem under large-scale failure. This paper introduces Zone concept in the Shared Risk Link Group. Basing on MTW algorithm, this paper proposes a MTW algorithm under Zone restrictions. Simulation result shows that the algorithm reduces the impact of large-scale network failures, and improves the efficiency of network restoration work under limited resources of repair.The research in this paper can be used as a reference to the optimization and planning of the railway transport network.