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A lot of work has been focused on designing and analyzing various cooperative diversity protocols for wireless relay networks.To provide a unified queuing analytic framework,we formulate an embedded Markov chain,which turns out to be a Quasi-Birth-and-Death (QBD) process.Using the Matrix-Geometric method,we can analyze the average delay in a unified way.Theoretical analysis is validated by simulation results.We show that the delay performances of Amplify-and-Forward or Decode-and-Forward (AF/DF) and incremental AF/DF schemes can be analyzed in the unified way.Thus,we can always choose the best cooperative diversity scheme in different scenarios for delay minimization.
A lot of work has been focused on designing and analyzing various cooperative diversity protocols for wireless relay networks. To provide a unified queuing analytic framework, we formulate an embedded Markov chain, which turns out to be a Quasi-Birth-and-Death (QBD Using the Matrix-Geometric method, we can analyze the average delay in a unified way. The optical analysis is validated by simulation results. We show that the delay performances of Amplify-and-Forward or Decode-and-Forward (AF / DF) and incremental AF / DF schemes can be analyzed in the unified way .hus, we can always choose the best cooperative diversity scheme in different scenarios for delay minimization.