CAC schemes taking advantage of additional information

Generally speaking, the parameter-based call admission control (CAC) approaches are conservative and lead to low network utilization since they use a worst-case model to ensure complete commitment conformance. Even if additional information of the new connection is available, they cannot take advantage of it. In this paper, we introduce some enhancements to the existing parameter based CAC algorithms for those applications in which one or two simple additional traffic characteristics are available, i.e. mean rate of the new connection and its rate variance. As well as showing how to do this, we give the reasons why we do this. We show that with these simple additional parameters, a much higher network utilization can be achieved. The numerical results demonstrate that the number of calls admitted to the network with our schemes is very close to (even equals) the best value