Analytical Study on Inter-Cell Handover via Non-Concentric Circles in Wireless Heterogeneous Small Cell Networks

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). Keywords：Heterogeneous and Small cell Networks (HetSNets); Inter-Small cell Handover; Circle of Apollonius.

Handover Decision-Making Algorithm for 5G Heterogeneous Networks

“…Using multiple criteria in performing handover decisions can provide a better handover performance than conventional handover algorithms that depend on one or two handover parameters. Fifth-generation network is the latest mobile wireless technology and is highly preferred because of its high data transmission rate and low latency [5]. However, the 5G network cell coverage is much smaller than its predecessor, the 4G network.…”

“…The proposed algorithm avoids unnecessary handover by estimating the connection time to a 5G small cell network using the dwell time prediction technique, while the network evaluation and selection are performed by the TOPSIS algorithm [6]. Fifth-generation network is the latest mobile wireless technology and is highly preferred because of its high data transmission rate and low latency [5]. However, the 5G network cell coverage is much smaller than its predecessor, the 4G network.…”