Routing, Resource Allocation and Network Design for Overlay Networks

To my wife Yan, and my parents, for their love, support and encouragement iii ACKNOWLEDGEMENTS My first, and most earnest, acknowledgment must go to my advisor Dr. Mostafa Ammar, who led me into the exciting area of networking and telecommunications. His insights, experience, encouragement, and uncompromising emphasis on quality research guided me through my entire program of study. Much of this thesis work is collaboration with Dr. Constantine Dovrolis. I have learned substantially from his detail-oriented attitude, enthusiasm and dedication to precise and high quality research. I owe a lot to Dr. Admela Jukan for her compassion, dedication, and constant encouragement during my early work in optical networks. This experience provided many important insights and valuable techniques to the thesis work presented here. Dr. Jun Xu offered me opportunities to work on network security projects and I am grateful for his help at different stages of my graduate study. I thank the rest of my thesis committee members: Dr. Ellen Zegura and Dr. Chuanyi Ji for their time and efforts in reviewing this work. Their valuable feedback helped me to improve the dissertation in many ways. I also thank all students and staffs in the Networking and Telecommunications Group, whose friendship and support have turned my journey through graduate school into a pleasure. Finally, I want to thank my parents, without whom none of these would be possible. I am especially indebted to my wonderful wife Yan, who has continually offered love, support, and inspiration. She also provided valuable help with remarkable intelligence in tackling some challenging problems in my thesis work. 7 Time scales for the measurement and dissemination of overlay link-state at the i'th overlay node. M i represents the start of an avail-bw measurement for all the egress overlay links of the i'th overlay node. R i is a link-state refresh event, and it takes place at the end of the last avail-bw measurement. R i,j a represents the arrival of the new link-state from overlay node i to node j. 22 8 A sketch of the native network topology (also showing the location of the overlay nodes).