NDLI: Optimization of time-to-trigger parameter on handover performance in LTE high-speed railway networks

Content Provider	IEEE Xplore Digital Library
Author	Yifan Zhang Muqing Wu Shunming Ge Linlin Luan Ankang Zhang
Copyright Year	2012
Description	Author affiliation: Beijing Key Laboratory of Network System Architecture and Convergence, Beijing University of Posts and Telecommunications, Beijing, China 100876 (Yifan Zhang; Muqing Wu; Shunming Ge; Linlin Luan; Ankang Zhang)
Abstract	Handover (HO) is one of the key procedures ensuring that user equipments (UE) can move through the network freely in long term evolution (LTE) systems. The basic idea is to use the handover control parameters, such as HO hysteresis and time-to-trigger (TTT), to enhance the HO success rate. Although TTT can mitigate the ping-pong handover (PPHO) effect, it also causes radio link failure (RLF) due to delayed HO. In this paper, we propose a HO parameter optimization algorithm where TTT is replaced by a statistical threshold value — Sthreshold, which can reduce the RLF rate. Both HO hysteresis and Sthreshold have been designed and implemented in a dynamic system level simulator and have been discussed for adaptive parameter combinations depending on different UE speed ranges in a high-speed railway scenario. Simulation results show that the optimized algorithm performs better than the traditional A3 event-based HO algorithm in high-speed railway networks.
Starting Page	251
Ending Page	255
File Size	711961
Page Count	5
File Format	PDF
ISBN	9781467345330
ISSN	18825621
e-ISBN	9789860334074
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-09-24
Publisher Place	Taiwan
Access Restriction	Subscribed
Rights Holder	NiCT
Subject Keyword	Algorithm design and analysis Statistical Threshold Heuristic algorithms Time-to-Trigger Rail transportation LTE High-speed Railway Networks Optimization Hysteresis
Content Type	Text
Resource Type	Article

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