Analysis of GSM-R Dual-Layer Network Coverage Technology

Railway operations is closely related to people´s livelihood, and the reliability, availability, maintainability and security of railway communication system are the focus and key issues of railway information construction. There are series of problems, such as the deterioration of communication performance (difficult to meet the needs of train control and train scheduling) because of the wireless coverage blind area and the serious small-scale decline, which will affect the reliable communication of high-speed railway traffic seriously. Then, it´s imperative to research railway communication technology and emergency protection strategy that suit the characteristics of railway with high reliability. This article focuses on high reliable networking key technology which is applicable for train control and train scheduling services.