KSII Transactions on Internet and Information Systems (TIIS)

Korean Society for Internet Information (한국인터넷정보학회)
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Analytical Study on Inter-Cell Handover via Non-Concentric Circles in Wireless Heterogeneous Small Cell Networks

  • Gu, Hangyu (College of Computer Science and Electronic Engineering, Hunan University) ;
  • Li, Shuangchun (College of Computer Science and Electronic Engineering, Hunan University) ;
  • Havyarimana, Vincent (Department of Applied Sciences, Ecole Normale Superieure) ;
  • Wang, Dong (College of Computer Science and Electronic Engineering, Hunan University) ;
  • Xiao, Zhu (College of Computer Science and Electronic Engineering, Hunan University)
  • Received : 2017.10.27
  • Accepted : 2018.01.09
  • Published : 2018.05.31
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Abstract

In this paper, we propose a novel inter-cell handover approach from a new perspective in dense Heterogeneous and Small Cell Networks (HetSNets). We first devise a cell selection mechanism to choose a proper candidate small cell for the UEs that tend to implement inter-small cell handover (ICH). By exploiting the property of a typical non-concentric circle, i.e., circle of Apollonius, we then propose a novel analytical method for modeling inter-cell handover regions and present mathematical derivation to prove that the inter-small cell handover issues fit the property of the circle of Apollonius. We design an inter-cell handover algorithm (ICHA) by means of our proposed handover model to dynamically configure hysteresis margin and properly implement handover decision in terms of UE's mobility. Simulation results demonstrate that the proposed ICHA yields lower call drop rate and radio link failure rate than the conventional methods and hence achieve high Handover Performance Indicator (HPI).

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