Abstract
This paper proposes a buffer-aided relay selection that is capable of exploiting both half-duplex and virtual full-duplex (VFD) transmissions in a hybrid manner. In the proposed scheme, we consider a two-hop cooperative network where each node is equipped with a single antenna, and no direct link between the source to the destination exists. The proposed scheme consists of five relay selection modes: two unicast modes, a broadcast mode, a cooperative beamforming mode, and a VFD mode. Owing to the broadcast mode, multiple relay nodes can seamlessly have a common packet; this mode is capable of solving the inter-relay interference problem imposed on the VFD mode. The proposed scheme’s theoretical performance bounds on the throughput, the outage probability, and the delay are derived. It is demonstrated in our simulations that the proposed scheme attains higher performance in terms of a throughput and an outage probability than the conventional schemes while maintaining an acceptable average end-to-end delay profile.
Highlights
T HE classic relay-assisted cooperative communications [1, 2] were designed for exploiting the spatial diversity gain, increasing the capacity and coverage
Motivated by the above-mentioned backcloth, the novel contribution of this paper is that we propose buffer-aided relaying selection that relies on hybrid exploitation of virtual full-duplex (VFD) and HD transmission to increase an average throughput
Since the relay nodes can share a packet with the aid of our broadcast mode, it is possible to carry out canceling of the effects of inter-relay interference (IRI) imposed at a receiving relay node based on ideal successive interference cancellation (SIC)
Summary
Sufficient selfinterference cancellation with a practical terminal cost is still an open issue To combat this limitation, the concept of FD transmission is incorporated into buffer-aided relay selection with HD relay nodes, which is referred to as virtual fullduplex (VFD) [35,36,37]. Motivated by the above-mentioned backcloth, the novel contribution of this paper is that we propose buffer-aided relaying selection that relies on hybrid exploitation of VFD and HD transmission to increase an average throughput. Since the relay nodes can share a packet with the aid of our broadcast mode, it is possible to carry out canceling of the effects of IRI imposed at a receiving relay node based on ideal successive interference cancellation (SIC).
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