Admission control schemes to provide class-level QoS in multiservice networks

In this work, we consider the scenario where different classes of traffic w ith differing bandwidth requirements are to be supported over a link with f inite capacity. The network will be required to meet class-level quality-of -service (QoS) constraints that are specified as relations between the call blocking probabilities of these traffic classes. The network will also be required to maintain maximum throughput performance. We develop two differe nt admission control schemes that consider these two important criteria. Fi rst, we choose an objective that maximizes the throughput subject to the co nstraint that the maximum deviation from the desired class-level QoS is sma ller than a certain pre-specified quantity. In the second approach, we choo se an objective that minimizes the deviation from the desired class-level Q oS subject to the throughput being greater than a pre-specified minimum val ue. We show how these problems can be converted to linear programming probl ems. We illustrate our schemes using numerical examples. (C) 2001 Elsevier Science B.V. All rights reserved.