On the issue of using digital radio communications of the DMR standard to control the train traffic on Russian railways

Presented research is dedicated to the gradual transition from analogue types of railway radio communications to digital radio standards, mainly to the DMR standard. It was found that there is a lack of theoretical basis for this problem. The article set and solved the following tasks: determination of the volume of information transfers between trains and railway infrastructure, calculation of the information load arising in this case in the radio channel, determination of the required number of radio channels depending on the intensity of train traffic and the frequency of information transmissions. Moreover, a formalization of the methodology for calculating the radio range of a frequency band of 160 MHz, the dependences of the radio range on the level of reliability, power of base station, antennas installation heights and types of track complexity was carried out. The theoretical models and the graphs can be useful in the design and operation of railway traffic control systems, the principle of which is based on the use of a digital radio channel.