Queueing characteristics of a telephone data transmission system with feedback

Experimental error data were used to measure the queueing characteristics of a simulated detect and repeat telephone data transmission system operating with a constant rate source. The maximum queue varied considerably as a function of the telephone circuit error sample and data system. Several ratios of source rate to channel rate were used and with ratios of one-half or lower queues of more than 100,000 bits were found. Measurements were also made of the frequency of exceeding a buffer which was smaller than the maximum queue.