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학술지 High Speed Train Communications in 5G: Design Elements to Overcome Very High Mobility
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저자
노고산, 회빙, 김일규
발행일
202012
출처
IEEE Wireless Communications, v.27 no.6, pp.98-106
ISSN
1536-1284
출판사
IEEE
DOI
https://dx.doi.org/10.1109/MWC.001.2000034
협약과제
20HH3100, [사회문제] 통신비 부담 경감을 위한 대중교통수단에서의 공공와이파이 체감 품질 개선, 정희상
초록
5G wireless technology is expected to provide much improved performance in terms of data rate, reliability, latency, and mobility in various use cases and deployment scenarios. One of these promising 5G deployment scenarios is the high speed train scenario, which aims to offer broadband access to passengers on a high speed train running up to 500 km/h. Such very high mobility imposes considerable technical challenges to be dealt with during the 5G standardization phases. This article introduces the technical specifications of 5G NR with particular attention on the high speed train scenario. Based on the concrete high speed train scenario description, various NR design elements to achieve such very high mobility are discussed including numerology, frame structure, reference signals, multi-antenna schemes, cell search, random access, and mobility support. Discussions on the challenges and perspectives for high speed train communications of Beyond 5G are also provided.
KSP 제안 키워드
5G wireless technology, Cell search, Design elements, Frame structure, High Mobility, High Speed Train, Random Access, Technical Challenges, Technical specifications, Train running, Use Cases