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Journal Article Mobility Robustness Optimization for Handover Failure Reduction in LTE Small-Cell Networks
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Authors
Minh Thang Nguyen, 권성오, Kim Hong Soog
Issue Date
201805
Source
IEEE Transactions on Vehicular Technology, v.67 no.5, pp.4672-4676
ISSN
0018-9545
Publisher
IEEE
DOI
https://dx.doi.org/10.1109/TVT.2017.2787602
Project Code
17HF1600, Development of 5G Mobile Communication Technologies for Hyper-connected smart services, Chung Hyun Kyu
Abstract
In this paper, we propose a distributed mobility robustness optimization algorithm to minimize handover failures due to radio link failures by adjusting time-to-trigger and offset parameters. According to the reason for failure, the algorithm classifies handover failure into three categories (too late, too early, and wrong cell), and simultaneously optimizes three handover parameters according to the dominant failure. Moreover, the algorithm considers handover failures to each neighboring cell and adjusts handover parameters individually. Via simulation, we show how the proposed algorithm adaptively optimizes the parameters and outperforms previous algorithms in various mobile environments.
KSP Keywords
Distributed mobility, Handover failure, Handover parameters, Link failure, Mobility Robustness Optimization, Optimization algorithm, Small Cell Network(SCN), mobile environment, radio link, time to trigger(TTT)