High-speed Railway Safety Fiber Optic Lan

With the development of high-speed railway and increasing speed of runingtrains, the used signalling technology is not enough for the safely running of high-speed train, in which safety information transmits in copper cable. Using technologyof optical communication, compuler and network, the Local Area NetWork for safetyinformation of high-speed railway can transmit safety signal more safely, reliably,real-timely lt is importan improvement in transmission of railway safety signal,In this thesis, after analysis of topology structure, media access control methodand data link control protocol, we discussed two netWorks. One is the high-speedrailway false-safe LAN. The other is the Integrated Information Access Network ofrailway These two networks are both for transmission of raiIway safety information.And in this thesis the software and hardwar of network node equipment wasdiscussed too. We have finished two networks for trial in lab. In trial, both of themcan transmit safety signal safely, reliably, real-timely.