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학술대회 Analysis of Handover Failures in LTE Femtocell Systems
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저자
배형득, 유병한, 박남훈
발행일
201111
출처
Australian Telecommunication Networks and Applications Conference (ATNAC) 2011, pp.1-5
DOI
https://dx.doi.org/10.1109/ATNAC.2011.6096636
협약과제
11MI1700, LTE-Advanced 시스템을 위한 SON 및 Femtocell 기술 개발, 박남훈
초록
In this paper, we evaluate handover (HO) performance when user equipment (UE) moves between femto cell and macro cell in long term evolution (LTE) systems. The focus is on the HO performance for inbound and outbound mobility which corresponds to handoff between the femtocell and the macro cell. Due to the severe signal-to-interference noise ratio (SINR) degradation near the edge area of femtocell, HO triggering for inbound and outbound mobility needs to be carefully selected than that of the macro cell. Too late HO triggering leads to radio link failures (RLF), whereas too early HO triggering causes ping-pong HO. In this paper, we take the neighbouring cell configurations into account to keep the allowable RLF rate and low ping-pong rates. We propose a cell-types adaptive handover margins algorithm, which assigns different handover margins in line with neighbouring cell types. Simulation results indicate that the low ping-pong rate and the low RLF rate are achieved simultaneously by using the proposed algorithm. © 2011 IEEE.
KSP 제안 키워드
Cell configuration, Cell types, Handover failure, LTE femtocell, Link failure, Long term Evolution(LTE), Macro cell, Ping-pong, User equipment(UE), radio link, signal-to-interference-plus-noise ratio(SINR)