MOBILITY MANAGEMENT IN FUTURE WIRELESS CELLULAR NETWORKS: AN ANALYTICAL STUDY FOR INTERACTION OF 5G NETWORKS AND MACRO-CELLS

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Tezin Türü: Yüksek Lisans

Tezin Yürütüldüğü Kurum: Orta Doğu Teknik Üniversitesi, Odtü Kuzey Kıbrıs Kampusu (Kktc-Güzelyurt), Bilgisayar Mühendisliği Bölümü, Türkiye

Tezin Onay Tarihi: 2020

Tezin Dili: İngilizce

Öğrenci: Mahnoor Yaqoob

Danışman: Enver Ever

Özet:

The unprecedented growth in the number of mobile nodes, connected devices, and data traffic lead to the dense deployment of fifth generation (5G) networks. In such networks, small cells or femtocell are becoming quite popular mainly because of their features such as consistent coverage regardless of the location, transmit power adjustment, energy efficiency, and their ability of providing higher data rates compared to traditional cellular networks. Their ability of using energy more efficiently has caused the demand for this technology to grow rapidly. The use of Femtocell based technologies has a positive impact on the standard of our lifestyle in so many ways such as healthcare services, e-commerce, e-government and so on. Considering the future of cellular technologies such as LTE Femtocells, and fifth generation cellular networks, it is necessary to study the integration of femtocell concept with the new enabling technologies and application areas. Although the aim of increased number of femtocells is to satisfy high data traffic in next-generation 5G networks, the high number of small cell deployments in such networks may result in unnecessary, frequent, and back-and-forth handovers. The frequent handover problem gives rise to a key issue of Mobility Management in wireless systems.  Therefore, the need for improvement and optimization in femtocells regarding handover paradigms and coexistence with other technologies should be investigated.  For different scenarios based on the mobility of the user equipment mobile station should be able to seamlessly perform vertical handover between cellular networks and femtocells. This study aims to propose an analytical model to analyse the integration of femtocells into integrated heterogeneous wireless cellular network.  Such an interaction between the integrated networks will be modelled using two dimensional Markov Chains, to analyse the performance of the wireless systems in terms of mobility of the user.