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Agenda

26/05/2017

Doctorate thesis defense of Imen JOUILI MABROUK




Doctorate thesis defense on May 26th 2017 at 10H00 AM ,in Amphi, ISET'COM.


Entitled :IMPROVING THE QUALITY OF SERVICE DURING HANDOVER IN LTE-ADVANCED NETWORKS

Presented by :Imen JOUILI MABROUK





Committee


President

Sihem GUEMARA

Professor, Sup’Com , Tunisia

 

 

 

Examiner

Zied CHOUKAIR

Professor, Sup'Com, Tunisia

   

Reviewers

Francine KRIEF

Professor , ENSEIRB ,France

 

Lamia CHAARI

A.Professor, ISIMS, Tunisia

 

Thesis Director

Mounir FRIKHA

Professor at Sup'Com, Tunisia

 

Abstract


Given the rapid expansion of Long Term Evolution (LTE) systems, Quality of Service (QoS) have always been a key factor when it comes to users’ Quality of Experience (QoE). Operators and service providers are, more than ever, focused on providing better data rate and more reliable services especially under higher mobility circumstances. However, in high speed case, QoS in LTE-Advanced (LTE-A) systems still poses quite a challenge especially for Real-Time (RT) ser-vices. Within highly dynamic nodes, handover occurs so often that currently used resources in a “source node” may not be available in the “target node” during the handover decision.


In this work, we propose two approaches to maintain QoS during high speed handover scenarios. The first approach is an Extended Soft Handover Algorithm (EHSA) based on Carrier Aggrega-tion (CA) and Coordinated Multiple Point (CoMP) technologies. The second approach is a Net-work Coding Algorithm (NCA), which combines Network Coding and CoMP technologies. A comparative analysis proved that both methods optimize resource assignment and sustain better levels of QoS during handover decision by reference to the conventional CoMP handover. Nev-ertheless, the ESHA based approach seems to fit most, real time applications. While NCA ap-proach, handles more efficiently resource allocation in scarce resource conditions.


Keywords


LTE-A, Handover, Carrier Aggregation, CoMP, Resource Blocs, QoS, Network coding.