Application Of MSTP Technology Based On SDH In Rail Transit Communication System

Nowadays, our country is in the stage of rapid developments. With the rapid developments of industry、agriculture、electronics technology, our economic conditions have great progress, constantly improve people’s standard of living. But, at the same time, many problems gradually appear. Living in a second tier city, citizen income, savings gradually become rich, many people began to have private motor vehicles. The situation has buried the huge hidden trouble -- more and more motor vehicles occupied almost the main ground city traffic resources, the speed of city traffic infrastructure construction is far less than the rapid growth of the number of the car, ground traffic becomes crowd. So, lots of cities look on the development of city rail traffic as one of the most important goal of city public facilities construction.Since 1868,the first underground railway built in London,78 cities in the world had the construction of an underground railway.The total operation line has a distance of 5500km. The opration lines contain a special communication system, most of these lines also have a civilian communication system. The special communication system is used for scheduling, rail transit and rail transit company’s working. And civil communication is built for passenger,so that the people can use their cell phone and serve on line in the riding process (especially the underground rail transit).This article is about the MSTP transmisson system used in special communication,and the civil communication system is same as ISP.In this paper, the author has a deeply study in base knowledge whitch contains SDH、MPLS VPN and RPR.I also have a deeply analysis in the found of communication system in rail transit and the mode of its architecture.The analysis is mainly in the demand of bearing mode、band width、 number of the port and the collections of the total demand.The author will make the designs of network、 protection、usage、hardware、demand and slots by involved in a construction project in the situation of mastering the base knowledge and demand.We can make a implementing plan for network paraments setting up by the guide of the design.At last,let’s check if the MSTP devices whitch was set up can meet the demand.The paper will record and collect the whole studying researching,and the technology plan will be took shape.The author also will take a future looking of the technology’s development,take a analtsis of the shortcomings of MSTP.We can develop this technology by avoiding these shortcomings.At the same time,we must know whether the new developed technology can use in the project or not at present.We can get experiences from mainstream technology,get new thinking from new technology.By gathering experirnces and thinkings,we can use any technology when the situation is suitable.Author will master the whole usage of MSTP in rail transit system,get the abilities on demand of analysis、 system construction、design、implement.