Implementation problems of retransmission protocols: SR-ARQ revisited

This paper addresses some specific problems of the retransmission protocols, collectively known as automatic repeat request (ARQ), which enhance the link quality overlaid on noisy channels. Because the foundation for almost all the efficient versions of ARQ such as hybrid-ARQ is the selective-repeat ARQ, this paper revisits this protocol and identifies a few key issues which affect the practical implementation. It reiterates some of the procedures described in the previous literature but suggests fine adjustments required.