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Mobile Information Systems
Volume 2016 (2016), Article ID 2368427, 11 pages
http://dx.doi.org/10.1155/2016/2368427
Research Article

Data-Driven Handover Optimization in Next Generation Mobile Communication Networks

Department of Communications Engineering, Yuan Ze University, Taoyuan 320, Taiwan

Received 1 April 2016; Revised 3 July 2016; Accepted 5 July 2016

Academic Editor: Young-June Choi

Copyright © 2016 Po-Chiang Lin et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Network densification is regarded as one of the important ingredients to increase capacity for next generation mobile communication networks. However, it also leads to mobility problems since users are more likely to hand over to another cell in dense or even ultradense mobile communication networks. Therefore, supporting seamless and robust connectivity through such networks becomes a very important issue. In this paper, we investigate handover (HO) optimization in next generation mobile communication networks. We propose a data-driven handover optimization (DHO) approach, which aims to mitigate mobility problems including too-late HO, too-early HO, HO to wrong cell, ping-pong HO, and unnecessary HO. The key performance indicator (KPI) is defined as the weighted average of the ratios of these mobility problems. The DHO approach collects data from the mobile communication measurement results and provides a model to estimate the relationship between the KPI and features from the collected dataset. Based on the model, the handover parameters, including the handover margin and time-to-trigger, are optimized to minimize the KPI. Simulation results show that the proposed DHO approach could effectively mitigate mobility problems.