PERFORMANCE ANALYSIS OF AN INTEGRATED DATA VOICE LINK

Abstract

We study the performance of a communication channel carrying data and voice traffic. The capacity of the channel is assumed to be insufficient for both types of traffic during periods of peak demand. Data is therefore buffered. We model such a communications channel. Data is assumed to arrive at a constant fixed rate. Voice is generated by multiple sources that turn on and off randomly. The probability that voice occupies the maximum allowable capacity is the measure of voice performance and the distribution of data buffer lengths and data waiting times measures data performance. We obtain closed form expressions for the performance parameters. The 95th percentile of the probability distribution of buffer length and waiting time is used to produce design curves for an integrated data voice channel. We investigate the effect of various system parameters on the performance for data and voice traffic.