Comparison of go-back-N and selective reject ARQ modes of HDLC over half-duplex and full-duplex IR links and the effects of window size and processor speed in utilization

In this paper, we present the performance of go-back-N and selective-reject automatic repeat request modes of high level data link control (HDLC) and the effect of the window size, packet error rate and processor speed in the maximum utilization in infrared wireless transmission systems. The maximum utilization (efficiency) performance of these protocols in half-duplex and full-duplex environments are being driven under different channel conditions. We demonstrate which link parameter is dominant in the performance under different link conditions, and also optimal packet sizes for ARQ schemes. It is also concluded that processing time affects the performance more than channel capacity after accomplishing a certain bit error rate.