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학술지 Handover based on Maximum Cell Residence Time and Adaptive TTT for LTE-R High-Speed Railways
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저자
조한벽, 한동혁, 신성진, 조형준, 이창성, 임고은, 강민구, 정종문
발행일
201708
출처
KSII Transactions on Internet and Information Systems, v.11 no.8, pp.4061-4076
ISSN
1976-7277
출판사
한국인터넷정보학회
DOI
https://dx.doi.org/10.3837/tiis.2017.08.017
협약과제
17GS1100, 철도전용 무선통신망 표준화 연구, 조한벽
초록
With the development of high-speed railway technologies, train velocities can now reach speeds up to 350 km/h, and higher in the future. In high-speed railway systems (HSRs), loss of communication can result in serious accidents, especially when the train is controlled through wireless communications. For to this reason, operators of Long Term Evolution for Railway (LTE-R) communication systems install eNodeBs (eNBs) with high density to achieve highly reliable communications. However, densely located eNBs can result in unnecessary frequent handovers (HOs) resulting in instability because, during every HO process, there is a period of time in which the communication link is disconnected. To solve this problem, in this paper, an HO scheme based on the maximum cell residence time (CRT) and adaptive time to trigger (aTTT), which are collectively called CaT, is proposed to reduce unnecessary HOs (using CRT estimations) and decrease HO failures by improving the handover command transmission point (HCTP) in LTE-R HSR communications.
키워드
Handover, High-speed railway, LTE-R
KSP 제안 키워드
Cell residence time, Communication link, Communication system, High-density, LTE-R, Long term Evolution(LTE), Railway system, command transmission, high-speed railway, highly reliable, time to trigger(TTT)