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Identifier uch.csd.msc//2001margetis
Title Παροχή διαφοροποιημένων υπηρεσιών με μηχανισμούς ελέγχου συμφόρησης από άκρη - σε - άκρη
Creator Margetis, George I
Abstract The Differentiated Services (DiffServ) architecture provides one solution for service differentiation in the Internet. It follows the logic that, a small number of forwarding behaviors implemented at the routers are sufficient for providing service differentiation. The drawbacks of the approach are the increased complexity, compared to the Internet today and the need for co-operation among the routers in order to provide end ? to ? end services. Α different approach considers a network that provides a simple feedback mechanism, namely Explicit Congestion Notification (ECN), which is based on packet marking every time there is congestion. This mechanism sends congestion information to intelligent end-systems, which adjust their transmission rate in response to feedback. The bulk of the research in this Master?s thesis deals with the study of algorithms, both for the congestion avoidance and fast convergence phases, which provide service differentiation according to the above approach. In parallel, we studied, how different packet marking algorithms, affected to the algorithms we studied. The implementation of the algorithms and the execution of our experiments was done, both in simulation, using Network Simulator 2 (NS2) and in a real test-bed, which is comprised of three workstations running the Unix based operation system, FreeBSD.
Issue date 2001-11-01
Date available 2001-11-27
Collection   School/Department--School of Sciences and Engineering--Department of Computer Science--Post-graduate theses
  Type of Work--Post-graduate theses
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