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Considering that full-duplex relaying (FDR) can achieve higher spectral efficiency than traditional half-duplex relaying (HDR), a spectrum sharing protocol based on FDR is proposed in this paper. We investigate a two-phase FDR spectrum sharing protocol in cognitive two-way relay networks. Analytical expressions for the outage probabilities of the primary and secondary systems under the proposed protocol...
In this letter, we study a classic three-node relay network with two end nodes and one relay. A unified signal model is proposed to represent four typical relay modes, namely, one-way half-duplex, two-way half-duplex, one-way full-duplex, and two-way full-duplex. This unified model is then applied to conveniently formulate the sum data rate of a multicarrier relay network with hybrid relay modes on...
In this paper, we study a new full duplex relaying (FDR) network in which the relay has a buffer and works in decode-and-forward (DF) protocol. We investigate the performance of three models in terms of throughput, i.e., Full duplex relay without buffer-aided (conventional FDR), full duplex relay with unlimited buffer, and full duplex relay with limited buffer, respectively, and derive the closed-form...
Spectrum sharing for cognitive two-way relaying is considered in this paper. A secondary relay is used to assist two-way communications between two primary users, and as a return, the secondary relay is allowed to transmit its own secondary signal by using some of the licensed primary spectrum. Three different spectrum sharing strategies are studied in this paper. In the baseline superposition coding...
Cognitive two-way relaying is studied in this paper. A secondary relay is used to assist bidirectional communication between a pair of primary users. As a return, the secondary relay is allowed to transmit its own secondary signal on the licensed primary spectrum. For this purpose, superposition coding is employed at the relay to superimpose the secondary signal on the primary signals. Three typical...
In this paper, we study a cognitive two-way relay network in which orthogonal frequency division multiplexing (OFDM) technique is adopted within the secondary system and a pair of secondary source nodes communicate with each other through a relay node by using amplify-and-forward two-way relaying strategy. We propose an optimal power allocation scheme to maximize the smaller data rate of the secondary...
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