Full duplex communications in 5G small cells

Mahmood, Nurul Huda; Sarret, Marta Gatnau; Berardinelli, Gilberto; Mogensen, Preben

doi:10.1109/iwcmc.2017.7986534

Cited by 26 publications

(15 citation statements)

References 13 publications

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“…In order to address the demand for increased network throughput, next-generation cellular networks will have to combine several innovative techniques, such as full-duplex (FD) radio [1], [2], millimeter wave (mmWave) communications [3], [4] and heterogeneous networks [1]. FD is a well investigated technology which could potentially double the spectral efficiency with respect to the half-duplex (HD) counterpart, as it employs simultaneous transmission and reception using non-orthogonal channels [5]. However, the non-orthogonal operation creates a loop-interference (LI) between the input and the output antennas.…”

Section: Introductionmentioning

confidence: 99%

Heterogeneous FD-mm-Wave Cellular Networks With Cell Center/Edge Users

Skouroumounis¹,

Psomas²,

Krikidis³

2019

IEEE Trans. Commun.

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In this paper, we assess the effect of full-duplex (FD) radio in the context of millimeter-wave (mmWave) communications. Particularly, we propose an analytical framework, based on stochastic geometry, to evaluate the performance of heterogeneous FD-mmWave cellular networks for two user location-based classifications, namely cell-center users (CCUs) and cell-edge users (CEUs). Moreover, we evaluate the performance of the considered networks with successive interference cancellation (SIC) capabilities. Based on the proposed framework, analytical expressions for the coverage and sum-rate performance are derived. We investigate the impact of FD-mmWave communications on the network performance of CCUs/CEUs and quantify the associated performance gains under different network parameter settings. Our results demonstrate the beneficial combination of FD radio with heterogeneous mmWave cellular networks, since it increases the spectral efficiency but also alleviates the effects of the multi-user interference. Furthermore, we present the trade-off between the coverage and sum-rate performance of heterogeneous FD-mmWave cellular networks for the considered user classifications. The results show that half-duplex mode is beneficial for the CEUs to achieve better network performance, as opposed to the CCUs for which FD mode is more efficient. Finally, we show the effectiveness of SIC on the network performance, with significant performance gains for the CEUs. Index TermsFull-duplex, heterogeneous networks, millimeter-wave, successive interference cancellation, stochastic geometry.Christodoulos Skouroumounis, Constantinos Psomas and Ioannis Krikidis are with the communications due to its abundant spectrum resources, which can lead to multi-Gbps rates [14]. As a result of their unique features such as directivity, sensitivity to blockages, and higher path losses, mmWave communications have fundamental differences with the current sub-6 GHz communications [14]. Due to these differences, the unique features of mmWave communications are required to be considered in the design of network architectures and protocols to fully exploit the potentials of mmWave communications. Network densification is proposed to address the large path-loss attenuation of mmWave frequencies, by bringing the transmitter closer to the receiver. This results in increased reliability, improved spectrum efficiency, and increased network capacity. Another important technique to compensate the large path-loss attenuation is the employment of directional antennas, which becomes feasible due to the short wavelength of mmWave signals. In addition to the difficulties caused by the unique features of the mmWave signals, recent studies have shown that these features also cause a positive effect on the network performance, which is the mitigation of the overall interference [15], [16], [18], [19]. Thus, the co-design of FD radio and mmWave networks is of critical importance in order to combat the severe multi-user interference caused by the FD technology by exploiting...

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Section: Introductionmentioning

confidence: 99%

Heterogeneous FD-mm-Wave Cellular Networks With Cell Center/Edge Users

Skouroumounis¹,

Psomas²,

Krikidis³

2019

IEEE Trans. Commun.

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“…Recent studies revealed that SI generated in FD radios can be significantly reduced via passive and active approaches [1][2][3][4]. The aforementioned SI suppression techniques enabled the practical feasibility of FD radios for 5G [6]. The aforementioned SI suppression techniques enabled the practical feasibility of FD radios for 5G [6].…”

mentioning

confidence: 99%

“…In [5], an FD WiFi-ready design is implemented such that the SI is limited to an extremely minimum level. The aforementioned SI suppression techniques enabled the practical feasibility of FD radios for 5G [6]. In multiple-input multiple-output (MIMO) FD systems, joint transmit and receive antenna selection is considered to obtain better system performance [7,8].…”

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confidence: 99%

Link selection based on switching between full‐duplex and half‐duplex modes

Kim

2019

ETRI Journal

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wileyonlinelibrary.com/journal/etrij | INTRODUCTIONFull-duplex (FD) two-way communication is a promising technique for doubling the spectral efficiency of conventional half-duplex (HD) systems via simultaneously performing both signal transmission and reception on the same frequency at the same time slot at a communication node [1,2]. In contrast to conventional HD communication, self-interference (SI) occurs between the transmitter and receiver at the same communication node. Recent studies revealed that SI generated in FD radios can be significantly reduced via passive and active approaches [1][2][3][4]. In [5], an FD WiFi-ready design is implemented such that the SI is limited to an extremely minimum level. The aforementioned SI suppression techniques enabled the practical feasibility of FD radios for 5G [6]. In multiple-input multiple-output (MIMO) FD systems, joint transmit and receive antenna selection is considered to obtain better system performance [7,8]. However, residual SI still exits and affects the FD system performance. When the residual SI is relatively high, its symbol error rate (SER) performance is highly constrained by the error floors.Specifically, the FD communication mode can achieve higher spectral efficiency than HD mode while HD outperforms FD in the high SI situation. Hence, the MIMO system performance can be improved if it is possible to exploit advantages of both the transmission modes. Thus, an effective method to enhance the system performance corresponds to a communication mode selection between FD and HD [9-13]. A hybrid FD/HD switching scheme (called X-duplex) in [9][10][11] is proposed for the relay system. In Multiple-input multiple-output systems can achieve a full sum rate (SR) via full duplex (FD). However, its performance is degraded by self-interference (SI) that occurs between the transmitter and receiver at the same node and thus is constrained by error floors. Conversely, half duplex (HD) can avoid the SI albeit at lower spectral efficiency, and the slope of its error curve is determined by the diversity order. In this study, a link selection scheme based on switching between FD and HD is examined as a simple method to improve the bit error rate (BER) performance of FD systems.In the proposed link selection algorithm, either FD or HD is selected based on the received minimum distance and signal-to-interference plus noise ratio. Simulation results indicate that the proposed hybrid FD/HD switching system offers significant BER performance improvement when compared with that of the conventional FD and FD based on only the received minimum distance under the same fixed SR.Under relatively sufficient SI cancellation, it is demonstrated to outperform the HD with a diversity advantage in low and medium signal-to-noise ratio region. K E Y W O R D Sfull duplex (FD), half duplex (HD), joint transmit and receive antenna selection, maximum likelihood (ML) receiver, X-duplex (XD) where he worked on a range of research projects in the field of wireless/mobile communications. Since 20...

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“…Until recently, most studies on FD communication have investigated its potential in according a throughput gain [3]- [8], and/or improving the transmission latency [9], [10]. It has been shown that the expected throughput gains are conditioned on three strong assumptions [11], namely i ) perfect SIC, ii) available traffic at both ends to exploit the arising transmission opportunities, and iii) similar levels of network interference with FD and HD transmissions. Simultaneous transmission from both ends leads to higher inter-cell interference (ICI) for a network of FD nodes compared to conventional HD nodes [3], [6].…”

mentioning

confidence: 99%

“…Such increased ICI, along with any residual self interference power, results in a reduction of the possible throughput gains. Additionally considering a practical downlink heavy traffic profile limits the instances where the simultaneous transmission/reception capabilities of FD communication can be utilized, resulting in a further reduction of the throughput gains [10], [11].…”

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confidence: 99%

Physical-Layer Security With Full-Duplex Transceivers and Multiuser Receiver at Eve

Mahmood

Ansari

Popovski

et al. 2017

IEEE Trans. Commun.

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Full-duplex communication enables simultaneous transmission from both ends of a communication link, thereby promising significant performance gains. Generally, it has been shown that the throughput and delay gains of full-duplex communication are somewhat limited in realistic network settings, leading researchers to study other possible applications that can accord higher gains. The potential of full-duplex communication in improving the physical-layer security of a communication link is investigated in this contribution. We specifically present a thorough analysis of the achievable ergodic secrecy rate and the secrecy degrees of freedom with full-duplex communication in the presence of a half-duplex eavesdropper node, with both single-user decoding and multiuser decoding capabilities. For the latter case, an eavesdropper with successive interference cancellation and joint decoding capabilities is assumed. Irrespective of the eavesdropper capabilities and channel strengths, the ergodic secrecy rate with full-duplex communication is found to grow linearly with the log of the direct channel signal-tonoise-ratio (SNR) as opposed to the flattened out secrecy rate with conventional half-duplex communication. Consequently, the secrecy degrees of freedom with full-duplex is shown to be two as opposed to that of zero in half-duplex mode.

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Full duplex communications in 5G small cells

Cited by 26 publications

References 13 publications

Heterogeneous FD-mm-Wave Cellular Networks With Cell Center/Edge Users

Heterogeneous FD-mm-Wave Cellular Networks With Cell Center/Edge Users

Link selection based on switching between full‐duplex and half‐duplex modes

Physical-Layer Security With Full-Duplex Transceivers and Multiuser Receiver at Eve

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