Improvements to Multimedia Content Delivery over IEEE 802.11 Networks

Abstract

This Ph.D. has marked a before and an after in my life. It has been four years of sacrifices, endless nights of working, tears and smiles that have also made me improve as a person. There is always some light at the end of the tunnel, but sometimes we need somebody to show it to us. That is why I would like to dedicate this Doctoral Thesis to all the people that have supported me in one way or another on this journey.First I want to thank my supervisors, José Miguel and Antonio, for giving me the opportunity of completing this Ph.D. Thank you for encouraging my research and for all the time you have always been willing to spend on me when I have needed it. I greatly appreciate your priceless patience with me, your ideas, your guidance and your support, especially at those tough times in the course of the Ph.D. I have been very lucky to have you as supervisors. Furthermore, I would like to thank my advisor during my internships in Italy, Roberto, since over time I have come to regard you as one of my supervisors. Thank you for giving me the chance to work with such an excellent team and for always treating me as part of the group. I am very thankful for your time, your immeasurable patience, your contributions and your invaluable support. Your enthusiasm and motivation have made me grow, achieve my goals and acquire greater confidence as a researcher.

Performance Analysis of Wireless Local Area Network for a High-/Low-Priority Traffic Ratio at Different Numbers of Access Categories

“…Nowadays, many works are devoted to study and improve the access method to the physical environment defined by IEEE 802.11 standard. A variety of research methods are used, for example, network simulator [2]; Markov chain [3]; Colored Petri Net [4]; machine learning [5]; to provide QoS to specific flows in network traffic, such as voice [11]; video [12]; downloading large files [13]; signaling [14], and integrated traffic [15].…”

“…As the higher-priority frames now have a better chance to be transmitted, the channel utilization is reduced. Many research works [2][3][4][5][6][7][8][9][10] are aimed to improve the performance of MAC sublayer by using different methods and research approaches [2,4,5]. Moreover, most of them aims to ensure the transmission of various traffic types with different requirements, however, the impact of different ratios of various traffic types on the network performance has not yet been studied.…”

A Novel Successive-Interference-Cancellation- Aware Design for Wireless Networks Using Software-Defined Networking

“…Existing studies of SDN-aware protocols mainly consider exploiting SDN for wireless MAC access [9], [10], [11], [12], [13]. However, none of these studies supports SIC transmission.…”

“…In OpenTDMF, the controller adopts a central coordination method to synchronize a wireless network's channel selection and time synchronization. Wi-Balance [13] uses an SDN controller to monitor network traffic data for calculating optimized contention parameters in EDCA, complying with different QoS requirements for different services.…”

An Algorithmic Approach to Identify the Optimum Network Architecture and WLAN Protocol for VoIP Application

“…It is crucial to introduce real-time traffic such as VoIP over WLAN with the continuous motion of business operation and end-users towards Wireless LAN (WLAN). These days, WLAN has become famous because deployment is fast and quick [1]. By providing reliable access to the network resources and implementing real-time traffic such as video and audio in business, institutional and home networks, WLAN has become service-dominant and has increased in popularity.…”