A Study of Providing Statistical QoS in a Differentiated Sevices Network

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Executive Summary

In this paper, authors propose and analyze a methodology for providing statistical guarantees within the diffserv model in a network that uses static-priority schedulers. They extend the previous work on statistical delay analysis and develop a method that can be used to derive delay bounds without specific information on flow population. With this new method, authors are able to successfully employ a utilization based admission control approach for flow admission. This approach does not require explicit delay computation at admission time and hence is scalable to large systems. They systematically analyze the performance of the approaches in terms of system utilization. As expected, the experimental data show that statistical services can achieve much higher utilization than deterministic services.

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