Problems of organizing of a radiotrack on a section of a high-speed railway line

Abstract

Implementation of such a large-scale project as the design and construction of a high-speed railway cannot be carried out without communication facilities. Undoubtedly, such a project should use the most modern communication facilities that satisfy both the operation of infrastructure facilities and rolling stock, and directly passengers. In Russia, mobile objects have never been provided with cellular communications in operational mode at speeds from 250 to 400 km/h. Naturally, the radio path in this case must be implemented on the currently modern LTE cellular communication standard. In this regard, conducting an analysis of the main factors influencing the organization of stable communications along the entire section of the high-speed railway is an urgent task. The results of the study are the definitions of problematic issues for organizing wireless communications at high speeds (over 250 km/h), such as the Doppler effect, signal level, the process of servicing mobile subscribers when transmitting them from one base station to another during a call or when transmitting information messages (handover) and the analysis of existing solutions for the implementation by leading Russian and world-famous manufacturers of 5G LTE network equipment. The practical significance of the study lies in the developed recommendations for organizing the management of a communication network in rail transport, namely, using joint cells between the nearest cellular cells by combining them into one logical cell.