Comments on "Capacity with explicit delay guarantees for generic sources over correlated Rayleigh channel"

TL;DR

This paper critiques a previous work on effective capacity calculation for correlated Rayleigh channels, demonstrating a fundamental flaw in their analytical approach and providing corrected quantification using a correlated ON-OFF process.

Contribution

It identifies a critical error in the prior method of calculating effective capacity and offers a corrected analytical approach with empirical quantification.

Findings

The previous method incorrectly applied the limit of the cumulative process.

The authors demonstrate the correct approach using the moment generating function.

Quantitative results are provided for a correlated ON-OFF process.

Abstract

We address a major flaw in the abovementioned paper, which proposes to calculate effective capacity of random channels by the use of central limit theorem. We analytically show that the authors are incorrect in finding the effective capacity by first taking the limit of cumulative random process rather than taking the limit of moment generating function of the same process. We later quantify our results over a correlated ON-OFF process.