The architecture of a middleware layer for controlling the quality of multimedia sessions |
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Authors: | Alaa Youssef Hussein Abdel-Wahab Kurt Maly |
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Institution: | (1) IBM Thomas J. Watson Research Center, P.O. Box 704, Yorktown Heights, NY 10598, USA;(2) Department of Computer Science, Old Dominion University, Norfolk, VA 23529, USA |
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Abstract: | Collaborative multimedia systems demand overall session quality control beyond the level of Quality of Service (QoS) as pertaining
to individual streams in isolation of others. To this end, we have recently introduced the concept of Quality of Session (QoSess)
control. At every instant in time, the quality of the session depends on the actual QoS offered by the system to each of the
application streams, as well as on the relative priorities of these streams according to the application semantics. In this
paper, we present the architecture of a middleware layer for controlling the quality of a session. In addition, we describe
the inter-stream bandwidth adaptation mechanisms, which are used by the QoSess layer to dynamically control the bandwidth
shares of the streams belonging to a session.
This revised version was published online in July 2006 with corrections to the Cover Date. |
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