Throughput analysis of buffered continuous ARQ scheme with multiple copy retransmission

Abstract

In this paper, we provide a quantitative analysis of the effect of improving the throughput characteristics by installation of a sequence control buffer in the receiver applied to the continuous ARQ (go-back-N) scheme, which is a typical method of transmission control in data communication networks, for the case when a simultaneous retransmission of multiple copies is allowed. A known method of improvement of the transmission characteristics is to store the correctly received data blocks in a buffer in cases when error recovery procedures are initiated, although no methods of accurate evaluation under the conditions of a reduced throughput have been proposed. In this paper, the error recovery process is expressed as a two-step hierarchical model. In the analysis model prepared for the purposes of this study, the retransmission cycles repeated for error recovery purposes and retransmission sets corresponding to the continuous error recovery operations are represented in the form of a two-step retransmission diagram. Using this model, we have demonstrated that, based on the 1223-type revised mean-value analysis that allows for the estimation of mean values of the influence between the sets, it is possible to considerably reduce the volume of calculations. Using the proposed method of analysis, it is possible to estimate the actual transmission rate within 2.5% of its absolute value, and the round trip delay with a time-dependent remote control can also be approximated. © 2000 Scripta Technica, Electron Comm Jpn Pt 1, 84(1): 49–58, 2001