On Monday. Feb. 12, at 10.00 am
Mohammad will give a seminar summarizing his PhD thesis,
just one hour before his PhD oral examination ...
Krys
--
* Dr Krzysztof Pawlikowski, Associate Professor
* Dept. of Computer Science ph. +(643) 3642987
ex.7772
* University of Canterbury fax. +(643) 3642569
* Christchurch, New Zealand URL: www.cosc.canterbury.ac.nz/~krys
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TITLE: A Scalable Distributed Cache
Architecture for Quality-of-Service (QoS) Routing in Large Communication
Networks
SPEAKER: Mohammad Rezvan
Department of Computer
Science
University
of Canterbury
VENUE: Room 031 Cosc/Math building - University of Canterbury
DATE: Monday, February 12, 2001
TIME: 10:00 to 11:00 followed
by questions
ABSTRACT: The rapid advances in telecommunication and Internet technologies is thedriving force behind the emergence of a new generation of network-orientedmultimedia applications such as Internet telephony and real time video.The Quality-of-Service (QoS) requirements of these applications are oftenone or more quantity such as bandwidth or delay. To successfully deploythese new applications, the communication networks should be QoS capableso that the network resources such as bandwidth can be reserved during thelifetime of an application. The most fundamental element of a QoS-capablenetwork is the QoS routing. A QoS routing architecture employs complicated routing algorithms to compute routes that can satisfy a set of QoSconstraints. The computing load caused by frequent execution of suchalgorithms, especially in large networks is a concern. Additionally,QoS routing algorithms need up-to-date network topology and state informationto compute the QoS routes. This mandates regular distribution of the stateand topology information across the network. The overhead traffic caused byfrequent update and redistribution of state and topology information,especially in large networks is a concern.In this thesis, we propose a distributed cache architecture to reduce theroute computing load caused by execution of the QoS routing algorithms,assuming a bandwidth-based QoS model.The distributed cache architecture has been designed to easily scale tolarge networks. In addition, we show that such architecture helps increasingthe robustness of QoS routing in the presence of inaccurate network stateinformation caused by long network state update intervals. This means thatthe proposed distributed cache architecture can also reduce the overheadtraffic caused by frequent distribution of the network state information,while achieving good performance.
all welcome ..
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