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학술대회 Handover Delay Mitigation for Korean Radio-based Train Control System
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오상철, 윤병식, 오우식, 김동준, 성동일
International Symposium on Personal, Indoor, and Mobile Radio Communication (PIMRC) 2019, pp.1-6
19GH1100, 자동운전을 지원하는 ETCS L3급 고속철도용 열차제어시스템 핵심기술 및 궤도회로 기능 대체기술 개발, 윤병식
This paper presents handover delay mitigation method by steering handover parameters in association with a speed variation of train in high-speed railway systems such as Korean radio-based train control system (KRTCS). The handover delay time, standard deviation and minimum average handover delay time along with train speed variation have been evaluated and compared through computer simulations in the paper.As the results indicates, increase of handover delay at high speed mobility came from quick channel variations that exceed the variation range, although link adaptation and channel dependent scheduling in sub-band level was applied. This brings increase of handover delay as well. Hence, we can conclude that a better handover delay performance can be achieved from the dynamic control of offset values regarding both reference signal received power (RSRP) and reference signal received quality (RSRQ) depending on train speed.
KSP 제안 키워드
Computer simulation(MC and MD), Delay Time, Dynamic control, Handover delay, Handover parameters, Link Adaptation(LA), Railway system, Reference Signal Received Power, Speed variation, Standard deviation(STD), Train control system