Supervisors info:
Λάζαρος Μεράκος, Καθηγητής, Πληροφορικής και Τηλεπικοινωνιών, Εθνικό και Καποδιστριακό Πανεπιστήμιο Αθηνών
Summary:
Nowadays, due to the continuous increase in Internet-based multimedia services, there is placed great emphasis in the design of networks that can support those services with adequate quality of service. In mobile networks, there has been observed a rapid transition from having the need to measure the Quality of Service to assess the user’s Quality of Experience. Due to this fact, this thesis focuses on the concept and the assessment of the QoE, with the aid of network simulators by demonstrating results of the analysis in realistic simulation examples. Initially, the architecture of the LTE-A system is presented and its’ basic concepts related to the networks’ operation, in order to guarantee the user’s expected quality of experience. Then, the QoS (Quality of Service) is described and how it can be differentiated for selected providers (OTT( Over The Top Providers)). Next, NS3 simulator is described as well as some scenarios that test the performance of the LTE-A networking technology. Finally, the QoE Monitor tool is shown, which has been created, within the NS3 simulator, to predict through objective measurements the quality of the video or audio as it is perceived by the end user. To export simulation results, user experience is examined on two real scenarios of cross traffic on different network topologies.
Keywords:
LTE-Advanced system, NS3 Simulator, QoE monitoring, Over the top providers, Quality of Experience
