Informatisches Colloquium Hamburg
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Wenn nicht anders angegeben, finden die Vorträge montags um 17.15 Uhr im Informatikum, Konrad-Zuse-Hörsaal, Gebäude B, Vogt-Kölln-Str. 30, Hamburg-Stellingen statt. |
17.5.2004 |
Prof. A.E. Krzesinski |
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Value-Based Bandwidth Re-Configuration in Connection-Oriented Networks
Market price systems constitute a well understood class of mechanisms that under certain conditions provide effective decentralization of decision making with minimal communication overhead. This seminar presents a model of a co-operative market for bandwidth re-allocation in connection-oriented networks.A bandwidth manager is assigned to each end-to-end route. The managers are autonomous, acting without centralized control from a system coordinator and behave entirely according to local rules. The managers are aware of local resource demands and bandwidth prices. The managers re-allocate bandwidth among themselves in order to maintain the Quality of Service (QoS) of their routes.
We present a simulation model of the bandwidth market. Two fictitious network
models are investigated: a 30-node 46-link European network and a 23-node
37-link USA network.
The European network model considers traffics whose average
parameters
are time-invariant. In the USA network model the average call arrival rates
are
subject to time dependent variations which could model a daily traffic
pattern.
Furthermore, the USA network nodes are located in different time zones.
The time zones give rise to local variations in the call arrival rates which
capacity re-allocation may be able to exploit in order to improve the route
revenues.
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Kontakt
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Prof. Dr. B. Page Telefon +49 40 42883 2426 |