LTE 기반 철도통합망(LTE-R)과 재난통신망(PS-LTE)의 기능 분석

초록

Due to the evolution of wireless communications technology, Long Term Evolution (LTE), which is a 4thgeneration mobile communications system, has been adopted as a railway communications system. This LTE Railway(LTE-R) system is composed of various elemental functions, which are largely categorized into public safety and wirelesscommunications for train control. Research on the public safety functions of railway communications have theirroots in TRS based national public safety communication systems, and research on wireless communications functionsfor train control have their roots GSM-R, which is utilized by the ETCS in Europe. Based on these circumstances, thispaper first analyzes the requirements for developing public safety technology in LTE-R, and compares those requirementswith the functions of public safety LTE (PS-LTE), which is being deployed for the first time in the world by theSouth Korean government. Based on an analysis of the common and specific functions of LTE-R and PS-LTE, we concludethat there is little problem in integrating LTE-R and PS-LTE from the perspective of functionality. Second, thispaper provides a comparison of the LTE-R requirements for the Quality of Service (QoS) with those of GSM-R utilizedby the ETCS. This offers a guideline to allow LTE-R to be applied to a 500km/h train control system.

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