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Bandwidth measurement and management for end-to-end connectivity over IP networks

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3 Author(s)
Ravindran, K. ; Dept. of Comput. Sci., City Univ. of New York, New York, NY ; Rabby, M. ; Liu, X.

The paper describes a policy-based model for cost-effective dasiadata connectivitypsila provisioning between session-level end-points. The connectivity provider (SP) may employ an architecture for end-to-end QoS control between data aggregation points. It involves: i) maintaining multiple diffserv-type connections between end-points with parameterizable QoS differentiation between them; and ii) admission control at end-points with intserv-type bandwidth management over connections. (ii) aggregates data flows with closely-similar QoS needs over a single end-to-end connection. (i) apportions the available infrastructure bandwidth between various end-to-end connections that carry (aggregated) data flows with distinct QoS levels. Flow aggregation over a connection allows reaping the statistical multiplexing gains in bandwidth, i.e., meets the SP's revenue incentives. Whereas, connection-level bandwidth allocation allows meeting the QoS needs of data flows, i.e., guarantees the end-user's utility. The management functions of SP monitor the changes and/or outages in network bandwidth in a dynamic setting (as in IP-based networks), and maps them onto the connectivity costs incurred for QoS control. Our model allows installing policy functions at end-points for cost-optimal connectivity provisioning.

Published in:

Communication Systems and Networks and Workshops, 2009. COMSNETS 2009. First International

Date of Conference:

5-10 Jan. 2009