Item Details

An Efficient Solution to Traffic Characterization of VBR Video in Quality-of-Service Networks

Liebeherr, Jorg; Wrege, Dallas
Format
Report
Author
Liebeherr, Jorg
Wrege, Dallas
Abstract
A network that offers deterministic, i.e., worst-case, quality-of-service (QoS) guarantees to variable-bit-rate (VBR) video must provide a resource reservation mechanism that allocates bandwidth, buffer space, and other resources for each video connection. Such a resource reservation scheme must be carefully designed, otherwise network resources are wasted. A key issue for the design of a resource reservation scheme is the selection of a traffic characterization that specifies the traffic arrivals on a video connection. The traffic characterization should accurately describe the actual arrivals so that a large number of connections can be supported, but it must also map directly into efficient traffic policing mechanisms that monitor arrivals on each connection. In this study, we present a fast and accurate traffic characterization method for stored VBR video in networks with a deterministic service. Our characterization approach approximates the so-called empirical envelope of a video sequence. We use this approximation to obtain a traffic characterization that can be efficiently policed by a small number of leaky buckets. We present a case study where we apply our characterization method to networks that employ a dynamic resource reservation scheme with renegotiation. We use traces from a set of 25-30 minute MPEG sequences to evaluate our method against other characterization schemes from the literature.
Language
English
Date Received
20121029
Published
University of Virginia, Department of Computer Science, 1996
Published Date
1996
Collection
Libra Open Repository
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