Performance analysis of ARQ error controls under Markovian block error pattern

The authors investigate the effect of forward/backward channel memory (statistical dependence in the occurrence of transmission errors) on ARQ error controls. To take into account the effect of backward channel errors in the performance analysis, they suppose some modified ARQ schemes that have an effective retransmission strategy to prevent the deadlock incurred by the errors on acknowledgments. They consider two modified go-back-N schemes with timer control and with buffer control, one modified selective-repeat scheme and one modified stop-and-wait scheme. By analytical and simulation results, they show how much the performance in throughput and delay of the modified ARQ schemes is affected by the degree of error burstiness when the forward and backward channels are governed by a first-order Markovian block error pattern. They also show that there exists a large difference between the performances with the burst and independent error cases