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2007

Flow-level QoS for a dynamic load of rate adaptive sessions sharing a bottleneck link

8 years 10 months ago
Flow-level QoS for a dynamic load of rate adaptive sessions sharing a bottleneck link
We consider the flow-level quality of service (QoS) seen by a dynamic load of rate adaptive sessions sharing a bottleneck link based on fair share bandwidth allocation. This is of interest both in considering wired networks supporting rate adaptive multimedia sessions and wireless networks supporting voice with rate adaptation to realize graceful degradation during congested periods. Two QoS metrics are considered: the time-average instantaneous utility of the allocated bandwidth, and the time-average of transition penalties associated with the changes in allocation seen by a flow. We present a simple model for rate adaptation, where (heterogeneous) flows can vary their rates within (different) ranges, and present closedform results for these perceived flow-level QoS metrics. We then prove asymptotic results for large capacity systems exhibiting the salient features of rate adaptation in a dynamic network. Finally, we provide a concrete example, showing how the QoS seen by sessio...
Steven Weber, Gustavo de Veciana
Added 12 Dec 2010
Updated 12 Dec 2010
Type Journal
Year 2007
Where CN
Authors Steven Weber, Gustavo de Veciana
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