Shumji Fujii

Performance analysis of go-back-N ARQ scheme with selective repeat in intra-block

The performances of the go-back-N ARQ scheme with selective repeat in intra-block (GBN-SR) and revised GBN-SR (Rev-GBN-SR) schemes are analyzed. Using the derived generating function of the service time of a packet, the throughputs of the proposed schemes are compared with that of Benellis (1986) scheme. It is shown that the proposed Rev-GBN-SR scheme shows good performance in a wider range from low to high packet error rate regions.

Throughput analysis of go-back-N ARQ scheme with selective repeat in intra-block

In this paper, we determine an exact formula for the throughput performance of the GBN SR scheme, in which the go-back-N ARQ scheme is used for inter-block transmission and the selective repeat scheme is used for intra-block transmission. Using that formula, the throughput performance of GBN SR scheme is compared with that of Benellis (1986, 1993) scheme in a numerical manner. As a result, it is shown that the throughput performance of the GBN SR scheme is superior to that of Benellis scheme in a wider range of packet error rate from low to medium, but is inferior at high packet error rates.

Effectiveness of copy-transmission in Go-Back-N ARQ system with selective repeat in intra-block and with limited retransmissions

In this paper, we consider the effectiveness of copy-transmission for a class of Go-Back-N ARQ scheme with block of multiple frames and with limited number of retransmissions (M). The retransmitted block is consisted from multiple-copies (C) of each requested frame. Based on the exact formulas of the probability generating function of slots needed to transmit a block and numerical examples, it is shown how to determine C and M for maximizing the throughput and minimizing the average transmission delay of a block within a specified tolerable value of unrecovered frame error rate.