The Application Of Programmable Logic Device In Optical LAN

With the development of high-speed railway and increasing speed of running trains, the traditional signaling technology is not enough for the safely running of high-speed train, in which safety information transmits in copper cable. Using technology of optical communication, computer and network, the Local Area Network for safety information of high-speed railway can transmit the information effectively, reliably, real-timely.In the area of electronic design technology, Programmable Logic Device with high reliability, high speed and low power, widely used in the developed countries and make great progress for digital system's design. Now the technology is at primary stage in China, but more and more professional engineer take attention to it.This paper mainly introduces how to design railway false-safe LAN with high speed, stability, great capacity and reliability by using Programmable Logic Device, analyzes the Programmable Logic Device technology, the topology structure, the media access control method and data link control protocol of the railway false-safe LAN, provides the solution using AlteraACEX IK device to design railway false-safe LAN's core modules.The module in the trial works stably, effectively and completely meets the technical requirement of the design. This provides very good model and experience for dedicate communication system's design and development for our railways in the near future.