日批在线视频_内射毛片内射国产夫妻_亚洲三级小视频_在线观看亚洲大片短视频_女性向h片资源在线观看_亚洲最大网

We have launched E-mail Alert service,subscribers can receive the latest catalogues free of charge

 
 
You Are Here: Home > Experts> Duan Bingde> Working Papers

Duan Bingde

High-speed Communication Technology: A Must for China’s High-speed Railway(Special Issues, No 65, 2015)

2016-02-18

By Xie Hengyuan, Cheng Lili & Zhu Xianqiang, Research Team on “Roadmap for the Development of China’s High-speed Railway IC Technology”, Information Center, DRC

Research Report, Special Issues, No 65, 2015 (Total NO 1468) 2015-12-31

Abstract: The railway communication system is an integrated and complete communication system especially for offering audio, visual and digital communication services for transportation and operation management. The railway communication system has evolved from cabled to wireless, from wireless radio dispatching systems of 150MHz or 450MHz to the GSM-R mobile railway communication system, witha more reliable traffic control system and higher communication quality. However, with the further development of high-speed railway, the current general GSM-R system is found hard to ensure reliable and higher-speed access to the communication system. Therefore, in order to leverage to the fullest the role of high-speed railway as the robust economic booster, it is imperative and crucial to introduce the high-speed communication system into China’s high-speed railway. The current railway communication system consists of the backbone network, the mobile communication network and the business network. The back bone network is mainly fiber-optical, the mobile communication network high-speed and the railway business network integrated, all of which feature a smart trend performance. The mobile communication network is the focus of all topics in our research. Generally speaking, the railway communication system is driven by the development needs of railway and integrated with technological development and communications industry.

Key words: railway communication system, GSM-R, mobile communication network, business network

 
主站蜘蛛池模板: 人人射视频| 日韩欧美爱爱 | 亚洲国产美女 | 亚洲999 | 亚洲精品视频二区 | 丁香婷婷激情 | 草草草在线观看 | 久久99深爱久久99精品 | 久久黑丝 | 香蕉视频h | a在线观看免费 | 欧美淫视频 | 国产精品二区视频 | 国产精品第一区 | 成年人网站免费在线观看 | 自拍视频在线 | 黄在线观看| 围产精品久久久久久久 | 亚洲成人少妇 | 一区二区三区四区精品 | 九九热精彩视频 | 日韩在线一二三区 | 日韩精品中文字幕在线观看 | 91麻豆精品国产91久久综合 | 亚洲自拍三区 | 激情五月婷婷网 | 99色在线视频 | 亚洲免费在线视频 | 国产精品超碰 | 婷婷中文字幕 | 色人阁av | 国产一区自拍视频 | 国产精品久久久久久久久久久久久久久久 | 青草综合 | 日本一区二区视频在线 | 亚洲自拍三区 | 成人一级黄色片 | 成人黄色片网站 | www.色婷婷| 久久先锋 | 日韩二区在线观看 |