Performance Study of an Improved Resource Allocation Scheme with Full-Duplex Relaying

Abstract

In this paper, performance of an improved resource allocation scheme with half-duplex and full-duplex relaying strategies in a cooperative cognitive radio network is studied. An improved resource allocation scheme in this work refers to an improved joint channel allocation and relay assignment (JCARA) scheme. The problem of maximizing the spectrum efficiency among multiple cognitive radio (CR) source–destination pairs, under both relaying strategies is studied with the number of channels, CR source- destination pairs, and CR relays. An improved channel allocation and relay assignment is carried out in the proposed algorithm to further increase spectrum efficiency. It is also shown that an improved JCARA results in better performance in terms of maximized minimum transmission rate than the results which are obtained through existing algorithm given in the literature. It is also demonstrated that the full-duplex relaying strategy which is first studied in this resource allocation scheme, results in an increased spectrum efficiency than the half-duplex relaying and CR relays are better utilized in full-duplex relaying. Numerical results are presented to show the effectiveness of an improved JCARA with full-duplex relaying and with half-duplex relaying.