Buffer-aided successive opportunistic relaying with inter-relay interference cancellation

Νομικός, Νικόλαος; Charalambous, Themistoklis; Krikidis, Ioannis; Skoutas, Dimitrios N.; Vouyioukas, Demosthenes; Johansson, Mikael

doi:10.1109/pimrc.2013.6666343

Cited by 25 publications

(31 citation statements)

References 12 publications

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“…With beamforming and taking inter-relay interference [16] proposes two buffer-aided relay selection schemes. Interference cancellation is employed in [17] to allow opportunistic relaying selection maximizing the average capacity of the network. For a practical system, OFDMA based cellular resource allocation schemes are proposed in [18] for multiple relay stations (RS) with adaptive RS activation.…”

Section: Related Workmentioning

confidence: 99%

Network-level performance evaluation of a two-relay cooperative random access wireless system

et al. 2015

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In wireless networks relay nodes can be used to assist the users transmissions to reach their destination. Work on relay cooperation, from a physical layer perspective, has up to now yielded well-known results. This paper takes a different stance focusing on network-level cooperation. Extending previous results for a single relay, we investigate here the benefits from the deployment of a second one. We assume that the two relays do not generate packets of their own and the system employs random access to the medium; we further consider slotted time and that the users have saturated queues. We obtain analytical expressions for the arrival and service rates of the queues of the two relays and the stability conditions. We investigate a model of the system, in which the users are divided into clusters, each being served by one relay, and show its advantages in terms of aggregate and throughput per user. We quantify the above, analytically for the case of the collision channel and through simulations for the case of multi-packet reception (MPR), and we provide insight on when the deployment of a second relay in the system can yield significant advantages.

Funding Agencies|European Union [324515, 612361]

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Section: Related Workmentioning

confidence: 99%

Network-level performance evaluation of a two-relay cooperative random access wireless system

et al. 2015

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Funding Agencies|European Union [324515, 612361]

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“…Compared with half-duplex systems, full-duplex systems can provide a better performance in terms of transmission rate. An opportunistic relay scheme has been applied to bufferaided systems in [20], [21] and [22]. In the opportunistic relay scheme, the inter-relay interference (IRI) is an important aspect that should be taken into account.…”

Section: A Prior and Related Workmentioning

confidence: 99%

“…In the opportunistic relay scheme, the inter-relay interference (IRI) is an important aspect that should be taken into account. In [20], IRI cancellation has been combined for the first time with buffer-aided relays and power adaptation to mitigate IRI and minimize the energy consumption. With one source and one destination, a new relay selection policy has been analyzed in terms of outage probability and diversity.…”

Section: A Prior and Related Workmentioning

confidence: 99%

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Opportunistic relay and jammer cooperation techniques for physical-layer security in buffer-aided relay networks

Lamare

2015

2015 International Symposium on Wireless Communication Systems (ISWCS)

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In this paper, we investigate opportunistic relay and jammer cooperation schemes in multiple-input multiple-output (MIMO) buffer-aided relay networks. The network consists of one source, an arbitrary number of relay nodes, legitimate users and eavesdroppers, with the constraints of physical layer security. We propose an algorithm to select a set of relay nodes to enhance the legitimate users' transmission and another set of relay nodes to perform jamming of the eavesdroppers. With Inter-Relay interference (IRI) taken into account, interference cancellation can be implemented to assist the transmission of the legitimate users. Secondly, IRI can also be used to further increase the level of harm of the jamming signal to the eavesdroppers. By exploiting the fact that the jamming signal can be stored at the relay nodes, we also propose a hybrid algorithm to set a signal-to-interference and noise ratio (SINR) threshold at the node to determine the type of signal stored at the relay node. With this separation, the signals with high SINR are delivered to the users as conventional relay systems and the low SINR performance signals are stored as potential jamming signals. Simulation results show that the proposed techniques obtain a significant improvement in secrecy rate over previously reported algorithms.

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“…In order to alleviate this loss, buffer-aided successive schemes have been proposed where two relays are concurrently activated, one for reception and the other for transmission, thus mimicking full-duplexity but at the cost of inter-relay interference (IRI). Works from this field include [7] where inter-relay interference was considered negligible and [8], [9] where IRI was mitigated to some extent through avoidance or cancellation. These studies have shown improved performance and the half-duplex loss has been recovered to a significant extend.…”

Section: Introductionmentioning

confidence: 99%

Hybrid cooperation through full-duplex opportunistic relaying and max-link relay selection with transmit power adaptation

Νομικός

Charalambous

Krikidis

et al. 2014

2014 IEEE International Conference on Communications (ICC)

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In this work, we study a cooperative network with multiple full-duplex buffer-aided relays. A hybrid cooperative relaying policy is proposed that employs power adaptation and consists of two alternative schemes: (i) full-duplex transmission through the relay which requires the least total power expenditure and loop interference is mitigated through power adaptation; (ii) buffer-aided max − link selection with power adaptation, when full-duplexity is not feasible. Aiming to reduce the overhead of channel state information (CSI) acquisition and processing, we propose a suboptimal distributed method for relay selection, for which the network performance is not degraded significantly. We show that power adaptation offers reduced overhead of CSI acquisition. Numerical results and comparisons with other state-of-the-art relaying schemes are provided and performance evaluation in terms of throughput, power minimization and switching rate, show the benefits of the proposed hybrid scheme.Index Terms-Cooperative networks, full-duplex, opportunistic relaying, buffer-aided relays, hybrid relay selection.

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Buffer-aided successive opportunistic relaying with inter-relay interference cancellation

Cited by 25 publications

References 12 publications

Network-level performance evaluation of a two-relay cooperative random access wireless system

Network-level performance evaluation of a two-relay cooperative random access wireless system

Opportunistic relay and jammer cooperation techniques for physical-layer security in buffer-aided relay networks

Hybrid cooperation through full-duplex opportunistic relaying and max-link relay selection with transmit power adaptation

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