Title: QoS/QoE Based Handover Decision in Multi-Tier LTE Networks

Issue Number: Vol. 8, No. 2
Year of Publication: Jun - 2018
Page Numbers: 133-138
Authors: Malak Sadik, Nadine Akkari, Ghadah Aldabbagh
Journal Name: International Journal of Digital Information and Wireless Communications (IJDIWC)
- Hong Kong
DOI:  http://dx.doi.org/10.17781/P002420


With the increasing demand on data rate in 5G mobile networks, the deployment of small cells such as Femto Access Points (FAP) and device-device (D2D) communications in parallel with macro-cells have been adopted as key technologies for improving spectral efficiency to support the vision of 1000x capacity in 5G systems. One major challenge in the future heterogeneous wireless networks (HetNet) is the mobility and handover management of the increased number of users. FAPs alone cannot sufficiently support data rate to users’ equipment (UEs) in crowded areas. Such UEs may benefit from Device-to-Device (D2D) assistance from nearby devices. Moreover, the traditional handover decision may result in a large number of handovers and increased handover blocking probability. For these reasons, a Fuzzy TOPSIS algorithm is proposed for the handover decision and network selection in the context of LTE FAPs and D2D communications. The proposed algorithm determines whether to perform a handover or not and then selects the best candidate network based on the Quality of Service (QoS) and Quality of Experience (QoE) scores, respectively. The proposed algorithm showed reduced number of unnecessary handovers, blocking probability and improved user throughput.