An Enhanced RED-Based Scheme for Differentiated Loss Guarantees
ABSTRACT Recently, researchers have explored to provide a queue management scheme with differentiated loss guarantees for the future
Internet. The Bounded Random Drop (BRD), known as the best existing scheme, is one of such efforts which guarantees strong
loss differentiation to the level of traffic in the different service classes. Even though BRD has several benefits such as
low complexities and good functionalities, we identify that it has some shortcomings such as low throughput, long queuing
delays, and selection problem of optimal values of parameters. Specifically, the shortcomings stem from calculating drop probabilities
based on the arrival rate estimation and dropping incoming packets randomly with calculated drop probabilities without considering
the current buffer occupancy. A multiple queue management scheme based on differential drop probability, called MQDDP, is
proposed to overcome BRD’s shortcomings as well as support absolute loss differentiation. This scheme extends the original
Random Early Detection (RED), recommended by IETF for next generation Internet gateways, into multiple class-based queues
by deriving the drop probability equations based on a queueing model. We also compare MQDDP to BRD for high traffic intensity
and show that MQDDP has the better performance in terms of packet drop rate.
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ABSTRACT: In this paper, the admission control mechanism inspired in the framework of proportional differentiated services has been investigated. The mechanism provides a predictable and controllable network service for real-time traffic in terms of blocking probability. Implementation of proportional differentiated admission control is a complicated computational problem. Previously, asymptotic assumptions have been used to simplify the problem, but it is unpractical for real world applications. We improve previous solutions of the problem and offer an efficient non-asymptotic method for implementation of proportional differentiated admission control. KeywordsQoS-resource management-admission control09/2010: pages 91-97;
EURASIP J. Wireless Comm. and Networking. 01/2011; 2011.