Research on handover strategy of heterogeneous networks based on user service quality

Abstract

Summary In view of the handover problem of visible light communication (VLC) and WiFi, most of existing works focus on optimization of vertical handover algorithm of heterogeneous network. However, cooperative handover strategy of horizontal handover (HHO) and vertical handover (VHO) was rarely studied. In the situation, this paper proposes a cooperative horizontal VHO (CHVHO) strategy for heterogeneous network based on quality of experience (QoE). This strategy mainly coordinates the HHO and VHO of the network from the aspects of building servers and the simplification of indoor movement model, which improves the QoE allocated to users. Simulation results demonstrate that, compared with traditional immediate VHO (IVHO) and dwell VHO (DVHO), this strategy can be adaptive to user movement and get higher average QoE.

Heterogeneous Network Switching Strategy Based on Communication Blind Area Dwell Time

“…The research in this article is presented in the model of a user quality of serv switching strategy for heterogeneous networks [10], which first detects the dw the user receiving device under the visible channel, sets a threshold value, and horizontal and vertical switching by comparing the dwell time with the thresh Although this model improves the communication quality, it ignores the comm in the channel fading region, so the communication stability is not strong. Base this paper uses ACO-OFDM technology to reduce multipath interference in chan mission while using the BER of the signal receiver to determine the indoor comm blind zone, which not only enhances the signal communication stability but also the recognition of the communication blind zone.…”

“…The research in this article is presented in the model of a user quality of service-based switching strategy for heterogeneous networks [10], which first detects the dwell time of the user receiving device under the visible channel, sets a threshold value, and performs horizontal and vertical switching by comparing the dwell time with the threshold value. Although this model improves the communication quality, it ignores the communication in the channel fading region, so the communication stability is not strong.…”

“…Wu [9] made use of mines as an application scenario to learn the heterogeneous networks and proposed a received signal strength (RSS) horizontal handover scheme on the basis of fast Fourier transformation (FFT) fading detection for coal mine working faces and a dynamic residence time vertical handover scheme for roadways, while the communication between coal mine working faces and roadway handover areas failed to be considered. Wang et al [10] proposed a heterogeneous network handover strategy that depended on the quality of service of users, using network dwell time as the handover mechanism and combining vertical handover algorithms on top of horizontal handover, but also failed to analyze the communication in the region of severe fading of visible light signals.…”