Analysis of Measured Loss Probability and Grade-of-Service in ISDNs
Abstract The accuracy of measured call congestion in a trunk group shared by various types of traffic is analyzed. An asymptotic approximation is derived using the respective variances of the number of arrivals and the number of lost calls and their covariance in a measurement period. Comparisons of the accuracy of the measured call congestion and of a measured time congestion indicate the performance of measurement methods in ISDNs. In addition, it is shown that the grade-of-services in busy hours may be degraded as a result of integration. These results are significant for management and control of ISDNs.