Development Study on CBTC Related Techniques Based on Systematically Analyzing Granted Patents of Alstom Company

Communication based train control (CBTC) system, which has been employed in the train-ground wireless communication scenario of modern train operation and control systems (OCS), can realize fast and accurate information transmission and enhance train operation efficiency and safety. Many companies, especially the ones in those countries with traditional technology advantages in railway system construction and operation, are developing and improving CBTC related technologies, and have applied for huge amount of related innovative patents. By considering that patents can not only help to protect related technologies from their corresponding companies and give related engineers or researchers in rail transit industry valuable methods or ideas for reference, but reflect the development of related techniques as well, in this paper, Alstom, which is a famous and representative company in railway signal industry in not only France but also the whole world and has applied abundant innovative patents during past decades, has been chosen as the research object, a thorough development study has been done on CBTC related techniques based on systematically analyzing granted patents of this company, and some ideas have been summarized and provided on CBTC development and application.