Transmitter buffer behaviour of stop-and-wait ARQ schemes with repeated transmissions

The statistical analysis of a number of previously proposed ARQ protocols of the stop-and-wait type is performed. Specifically, a method is described to find the tail distribution (i.e. the probability of exceeding a certain threshold) for the delay time of the transmitted data blocks and the queue or buffer occupancy at the transmitter side. A performance comparison of the schemes is given, based on both throughput and tail probability considerations.