Virtual full-duplex buffer-aided relaying in the presence of inter-relay interference

Kim, Sumin; Bengtsson, Mats

doi:10.1109/twc.2015.2514103

Cited by 40 publications

(38 citation statements)

References 43 publications

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“…If we have the direct transmission option, by considering the matrix H S,D , we also have to calculate the same expressions described in (21), multiplied by 2. Note that these examples were considered by adopting BPSK, but other constellations (QPSK, 16-QAM...) can be adopted.…”

Section: A Impact Of the MMD And Qn Criteria On Relay Selectionmentioning

confidence: 99%

Cloud-Aided Max-Link Relay Selection for Two-Way Cooperative Multi-Antenna Systems

Duarte

Lamare

2019

2019 53rd Asilomar Conference on Signals, Systems, and Computers

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In this work, we present a switched relaying framework for multiple-input multiple-output (MIMO) relay systems where a source node may transmit directly to a destination node or aided by relays. We also investigate relay selection techniques for the proposed switched relaying framework, whose relays are equipped with buffers. In particular, we develop a novel relay selection protocol based on switching and the selection of the best link, denoted as Switched Max-Link. We then propose the Maximum Minimum Distance (MMD) relay selection criterion for MIMO systems, which is based on the optimal Maximum Likelihood (ML) principle and can provide significant performance gains over other criteria, along with algorithms that are incorporated into the proposed Switched Max-Link protocol. An analysis of the proposed Switched Max-Link protocol and the MMD relay selection criterion in terms of computational cost, pairwise error probability, sum-rate and average delay is carried out. Simulations show that Switched Max-Link using the MMD criterion outperforms previous works in terms of sum-rate, pairwise error probability, average delay and bit error rate.

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Section: A Impact Of the MMD And Qn Criteria On Relay Selectionmentioning

confidence: 99%

Cloud-Aided Max-Link Relay Selection for Two-Way Cooperative Multi-Antenna Systems

Duarte

Lamare

2019

2019 53rd Asilomar Conference on Signals, Systems, and Computers

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“…Now, since the source is assumed to be backlogged, we can set the transmission rate at the source in time slot i, R SR (i), to R SR (i) = C SR (i), where C SR (i) is given by (8). As a result, the achievable rate on the S-R channel during N → ∞ time slots, denoted byR SR , is obtained…”

Section: A Problem Formulation For Buffer-aided Relaying With Adaptimentioning

confidence: 99%

On Buffer-Aided Relaying for the Two-Hop Full Duplex Relay Channel with Self-Interference

Razlighi

Zlatanov

2017

GLOBECOM 2017 - 2017 IEEE Global Communications Conference

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In this paper, we investigate the fading two-hop full-duplex (FD) relay channel with self-interference, which is comprised of a source, an FD relay impaired by self-interference, and a destination, where a direct source-destination link does not exist. For this channel, we propose three buffer-aided relaying schemes with adaptive reception-transmission at the FD relay for the cases when the source and the relay both perform adaptive-rate transmission with adaptive-power allocation, adaptive-rate transmission with fixed-power allocation, and fixed-rate transmission, respectively. The proposed buffer-aided relaying schemes enable the FD relay to adaptively select to either receive, transmit, or simultaneously receive and transmit in a given time slot based on the qualities of the receiving, transmitting, and self-interference channels; a degree-of-freedom unavailable without buffer-aided relaying. Our numerical results show that significant performance gains are achieved using the proposed buffer-aided relaying schemes compared to conventional FD relaying, where the FD relay is forced to always simultaneously receive and transmit, and to buffer-aided half-duplex relaying, where the half-duplex relay cannot simultaneously receive and transmit. The main implication of this work is that FD relaying systems without buffer-aided relaying miss-out on significant performance gains.

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“…For fixed rate transmission, the proposed min − power solution proposed in [24], combining power adaptation and interference cancellation, provides a performance close to the upper bound of SFD-MMRS. In addition, Kim and Bengtsson [26,27] proposed buffer-aided relay selection and beamforming schemes taking the IRI into consideration; they consider a model which can be regarded as an example of relay-assisted device-to-device (D2D) communications, where the source and destination are low-cost devices with a single antenna and the relays comprise more powerful relays with buffers and multiple antennas. Numerical results show that their approach outperforms SFD-MMRS when interference is taken into consideration, and when the number of relays and antennas increases they approach the performance of the interference-free SFD-MMRS, herein called the ideal SFD-MMRS.…”

Section: Introductionmentioning

confidence: 99%

“…In many practical considerations (e.g., wireless sensors), the relay nodes are hardware-limited to be HD while the source can be a more powerful wireless device with large buffers and multiple antennas. Although this observation is not always true (e.g., in D2D communications [26,27]), it is a reasonable and common practical scenario. Towards this end, we study a network which consists of a buffer-aided source with a single or multiple antennas, multiple HD buffer-aided relays and a destination.…”

Section: Introductionmentioning

confidence: 99%

Relay-pair selection in buffer-aided successive opportunistic relaying using a multi-antenna source

et al. 2019

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We study a cooperative network with a buffer-aided multi-antenna source, multiple half-duplex (HD) buffer-aided relays and a single destination. Such a setup could represent a cellular downlink scenario, in which the source can be a more powerful wireless device with a buffer and multiple antennas, while a set of intermediate less powerful devices are used as relays to reach the destination. The main target is to recover the multiplexing loss of the network by having the source and a relay to simultaneously transmit their information to another relay and the destination, respectively. Successive transmissions in such a cooperative network, however, cause inter-relay interference (IRI). First, by assuming global channel state information (CSI), we show that the detrimental effect of IRI can be alleviated by precoding at the source, mitigating or even fully cancelling the interference. A cooperative relaying policy is proposed that employs a joint precoding design and relay-pair selection. Note that both fixed rate and adaptive rate transmissions can be considered. For the case when channel state information is only available at the receiver side (CSIR), we propose a relay selection policy that employs a phase alignment technique to reduce the IRI. The performance of the two proposed relay pair selection policies are evaluated and compared with other state-of-the-art relaying schemes in terms of outage and throughput. The results show that the use of a powerful source can provide considerable performance improvements.

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Virtual full-duplex buffer-aided relaying in the presence of inter-relay interference

Cited by 40 publications

References 43 publications

Cloud-Aided Max-Link Relay Selection for Two-Way Cooperative Multi-Antenna Systems

Cloud-Aided Max-Link Relay Selection for Two-Way Cooperative Multi-Antenna Systems

On Buffer-Aided Relaying for the Two-Hop Full Duplex Relay Channel with Self-Interference

Relay-pair selection in buffer-aided successive opportunistic relaying using a multi-antenna source

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