Exact analysis of adaptive go-back-NARQ scheme

The analysis of the adaptive go-back-N scheme reported by Yao contains some mathematical inaccuracies, which have further been used by Annamalai et al. The authors provide an exact analysis of the adaptive scheme under identical operating conditions     

Analysis and Optimization of an Adaptive Selective-Repeat Scheme for Time-Varying Channels with Feedback Errors

In this article, an adaptive SR ARQ scheme is analyzed and optimized in a time-varying channel environment with unreliable feedback. Two-state Markov models are assumed for both the forward and the returnchannel.This enables the time behaviour of the entire system to be modelledby a Markov chain. To have an easy-to-implement scheme, we choose the smaller packet size to be half of the bigger one. Thus, there is only oneindependent design parameter related to packet size. The other two parametersare associated with channel sensing. The performance of the adaptive schemeis measured by its average throughput, which is upper-bounded by the throughput of the so-called ideal adaptive scheme. This upper bound is very useful in the optimization of the packet size and other design parameters. From the results, it can be concluded that the selection of the packet size is at least as critical as the optimization of the other parameters. The feedback errors degrade the throughput of the scheme, but their effect on the parameter optimization turns out to be almost negligible.     

On the performance of an adaptive GBN scheme in a time-varyingchannel

This paper presents a Markov model and an exact analysis of the performance of an adaptive go-back-N (GBN) scheme in a time-varying channel. This analysis provides fundamental insight into the operation of the scheme in a time-varying channel, and the effects of various system parameters and system design parameters     

Analysis of an Adaptive Selective-Reject Scheme in Time-Varying Channel with Non-Negligible Round-Trip Delay and Erroneous Feedback

In this article, an adaptive SR ARQ scheme is analyzed and optimized in a time-varying channel environment with unreliable feedback. To have an operational scheme, we choose the smaller packet size to be half of the bigger one. Thus, there is only one independent design parameter related to packet size. The other two parameters are associated with channel sensing. The performance of the adaptive scheme is measured by its average throughput, which is upper-bounded by the throughput of the so-called ideal adaptive scheme. This upper bound is very useful in the optimization of the packet size and other design parameters.