TCP Behaviour in Quality of Service Networks
Monday, July 2nd 2007, 13:00, Turing Lecture Hall
Professor Harsha SirisenaElectrical and Computer Engineering |
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It is a great pleasure for us to announce a talk from Prof. Harsha Sirisena from the University of Canterbury, New Zealand.
Abstract of the Talk
Many networks are being transformed to QoS networks, of which most are DiffServ domains. However, it is extremely difficult to overhaul the transport layer protocols such as TCP running on end nodes. TCP, which was designed to run on a Best Effort network, fails to deliver the performance guarantees expected of DiffServ. In this talk two aspects of TCP performance in a DiffServ network are discussed. First, a deterministic model of TCP is presented that intrinsically captures flow aggregation absent in previous models. Second, the transient behaviour of TCP is studied to show how DiffServ alters TCP dynamics. Then techniques that improve TCP performance over DiffServ are presented and validated through ns-2 simulation studies.
Background
Harsha Sirisena holds a BSc (Eng) degree with First Class Honours in Electrical Engineering from the University of Ceylon and a PhD degree in Control Engineering from the University of Cambridge.
He joined the University of Canterbury after working in Sri Lanka as an Engineer in the Government Electricity Department and then as a Lecturer in Electrical Engineering at the University of Ceylon. He is currently an Associate Professor in the Department of Electrical and Computer Engineering and leads the Networking research group.
During periods of study leave, he has held visiting academic positions at the Universities of Calgary, Lund and Minnesota, the Australian National University, the Hong Kong Polytechnic University and the National University of Singapore.
