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Frequent-handover Mitigation in Ultra-dense Heterogeneous Networks
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- Authors
- Md Mehedi Hasan, Sungoh Kwon, Sangchul Oh
- Issue Date
- 2019-01
- Citation
- IEEE Transactions on Vehicular Technology, v.68, no.1, pp.1035-1040
- ISSN
- 0018-9545
- Publisher
- IEEE
- Language
- English
- Type
- Journal Article
- Abstract
- In a heterogeneous network (HetNet) with ultra-dense small-cell deployment, fast-moving users may experience frequent handovers between small cells owing to the small coverage areas of those cells. Moreover, due to shadowing and channel fading, static or slow-moving users can also experience frequent handovers, called ping-pongs. Such redundant handovers are unacceptable, and can cause packet losses or packet delays leading to a poor user experience. To solve these unwanted handover problems, we propose a frequent handover mitigation algorithm for ultra-dense HetNets. Based on mobility behavior, the proposed algorithm categorizes frequent handover-experience users as either fast-moving or ping-pong users. Fast-moving users are then handed over to the macro layer, and ping-pong users are managed by adjustment of handover parameters. However, if ping-pongs cannot be avoided through handover-parameter adjustment, ping-pong users are handed over to the macro layer as well. Simulation results show that the proposed algorithm can reduce 79.56% of the overall handovers, and increase network throughput by 10.82%.
- KSP Keywords
- Channel fading, Dense heterogeneous networks(HetNets), Handover parameters, Mobility behavior, Parameter Adjustment, Ping-pong, Small cells, Ultra-dense, User experience, cell deployment, network throughput