Performance analysis of improved stutter go‐back‐n arq scheme

In the stutter go-back-N ARQ scheme proposed by Towsley, a packet is transmitted by sending its copies in idle slots. Thus, it can achieve very small packet delay at light-offered traffic load, but the maximum throughput is small. The stutter go-back-N scheme is improved by sending a multiple copy of a negatively acknowledged packet at retransmission time. The improved scheme is analyzed, and average packet delay, maximum throughput, and so on, are derived. Furthermore, from numerical examples, it is shown that the improved scheme can achieve higher throughput and smaller average packet delay than the basic go-back-N and the original stutter go-back-N schemes.