The rapid development of high-speed railway has brought new opportunities to GSM-R,but the high reliability requirements of high-speed railway pose a severe challenge to GSM-R,which serves as the platform for carrying train control information.Wireless access part of GSM-R system is a weak link,so the reliability of the wireless part will determine the overall system reliability.At the same time,fast movement of high-speed trains leads to frequent handover failure,which has a serious impact on the communication,so rational radio planning is needed to ensure the continuity and reliability of the communication.In this papar,focused on the high-speed railway scenario,the pros and cons of the different means of radio redundancy coverage scheme are compared.Cell coverage radius and distance between base stations are planned meeting the requirements of train control.The relationship between train speed and the overlap zone is analyzed with performance simulation.
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