Di erentiated Tra c-basedInterconnection Agreements for NextGeneration NetworksInauguraldissertationzur Erlangung des akademischen Gradeseines Doktors der Naturwissenschaftender Universit at Mannheimvorgelegt vonM.Sc. Ruzana Davoyanaus Tbilissi, GeorgienMannheim, 2010Dekan: Professor Dr. Felix Freiling, Universit at MannheimReferent: Dr. Wolfgang E elsberg, Universit at MannheimKorreferent: Professor Dr. J orn Altmann, Seoul National UniversityTag der mundlic hen Prufun g: 21. Juli 2010iCopyrightc 2010 by Ruzana DavoyanAll rights reservedii\I am enough of an artist to draw freely upon my imagination."Albert EinsteinAbstractRuzana DavoyanThe issue of inter-provider cost distribution in international interconnection has been asubject of intense debate in the past few years. For various reasons, developing countrieshave had to bear high costs for international Internet connectivity. The transition ofcommunication networks to IP-based networks enhances the urgency to resolve the ap-parent lack of fairness in international interconnection. This is due to the developmentof cheap technologies for voice communications, which reduces the revenues of develop-ing countries received from international telephone calls, and at the same time, placesthe burden of international Internet connectivity costs on developing countries.