Dynamic decentralised algorithms for cognitive radio relay networks with multiple primary and secondary users utilising matching theory

Abstract

ABSTRACTWe propose a distributed spectrum access algorithm for cognitive radio relay networks with multiple primary users (PUs) and multiple secondary users (SUs). The key idea behind the proposed algorithm is that the PUs negotiate with the SUs on both the amount of monetary compensation, and the amount of time the SUs are either (i) allowed spectrum access, or (ii) cooperatively relaying the PU's data, such that both the PUs' and the SUs' minimum rate requirements are satisfied. The proposed algorithm is shown to be flexible in prioritising either the PUs or the SUs. We prove that the proposed algorithm will result in the best possible stable matching and is weak Pareto optimal. Numerical analysis also reveals that the distributed algorithm can achieve a performance comparable to an optimal centralised solution, but with significantly less overhead and complexity. Copyright © 2013 John Wiley & Sons, Ltd.