Existing mobility protocols adopt centralized gateways to provide session continuity for mobile users. The centralized nature and the absence of effective selective traffic offload mechanism lead to inefficient data forwarding plane problem that congests 4G Evolved Packet Core (EPC). Despite the endless efforts of 3GPP, IETF, vendors, and researchers, these problems persist and restrict operators’ offering for residential/enterprise indoor services and session continuity in wide area motion as train or cars crossing cities’ boundaries. Existing mobility protocols, that struggle when connecting mobile users to static locations, can never satisfy the requirements of Internet of Things (IoT) for real time collaborative interactions between moving users and terminals attached to 5G edges as drones, robots, smart vehicles …etc. New mobility paradigm becomes a key enabler for collaborative interactions in IoT real time cognitive services as self-driving car, drones, remote health monitoring, smart homes/offices/farms …etc. The research provides a novel mobility framework based on Software Defined Network (SDN) to solve existing mobility problems, satisfy IoT collaborative interactions, and extend mobility coverage cross service providers under Service Level Agreements (SLAs) while ensuring the security of involved entities. Mobility is achieved through dynamic establishment of SDN overlay network that can cross any type of LAN/WAN/Cellular topology. The framework is fully aligned to Next Generation Network (NGN) where mobility is offered as a service and provides smooth integration to existing infrastructure. The mobility scope incorporates both intra-domain and inter-domain mobility. The former refers to mobility within a single SDN administrative domain while the later refers to that between multiple SDN domains. Intra-domain mobility scope targets existing mobility challenges as core network congestion problem, unified access in campus and enterprise for wireless/wired networks, and session continuity in standard and wide area motion for 3G/4G/5G mobile operators. Inter-domain mobility scope addresses three main challenges. The first is extension of indoor services for residential/enterprise using any type of communication as DSL/cable without enforcing Distributed Antenna System (DAS) or any small cell setup while ensuring the security of involved entities. The second is extending WiFi mobility cross enterprises with optimized usage of communicating WAN links while ensuring unified access to both wireless and wired networks regardless of overlapping configurations as IP subnets/VLAN that can exist in their intranets. The third is facilitating collaborative communication between static/moving users, servers, and terminals when joining from different carriers under Service Level Agreements (SLA).


Computer Science & Engineering Department

Graduation Date


Submission Date

May 2017

First Advisor

Mikhail, Mikhail N.

Committee Member 1

El-Kassas, Sherif

Committee Member 2

El-Kadi, Amr


152 p.

Document Type

Doctoral Dissertation


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Institutional Review Board (IRB) Approval

Not necessary for this item


First and foremost, my deepest gratitude and thanks are to GOD, the most beneficent and merciful for granting me the power to proceed and accomplish this work, regardless the limited resources available in Egypt to prototype technologies as those adopted in 5G next generation networks. This dissertation is dedicated to the soul of my beloved mother; Prof. Laila Fathalla. May God forgive her, grant her peace, and admit her to the highest ranks in Paradise. I will forever be indebted to her. Thank for her selfless and endless love. She has been the main motivator for me to complete my postgraduate studies. No word can describe what she has done for me. My deepest gratitude to my sister; Dr. Lamyaa Farouk, for her patience and encouragement while spending endless hours in experimenting and completing my writing up. It is an honor for me to work my PhD research under supervision of Prof. Mikhail N. Mikhail. I take the chance to show him my sincerest gratitude. His encouragement, guidance, and support throughout my research enabled me to develop a deep understanding of the subject. This research would not have been possible without his patience and knowledge. He has made his support available all the time while granting me a room to express my ideas and thoughts. His experience and analysis for my ideas are the key factors for developing the proposed architecture with such practical and structural vision. One simply could not wish for a better or friendlier supervisor. I am indebted to Prof. Amr El-Kadi and Prof. Sherif El-Kassas. Their lectures in “Distributed Systems” facilitate for me the designing of such scalable architecture. Their comments during the proposal of this research definitely supported me to highlights the strength of my contributions when comparing my results to existing mobility standards. Lastly, I would like to thank both PhD and Computer Science and Engineering departments in American University for providing me the support during my research period. Special thanks to the program director Prof. Mohamed Moustafa. His continuous advices and follow up have helped me to proceed faster in my research. Also, I offer my regards and thanks to all who supported me in any respect during my research completion.