Full-Duplex User Relaying for NOMA System With Self-Energy Recycling

Wang, Zhenling; Yue, Xinwei; Peng, Zhangyou

doi:10.1109/access.2018.2876859

Cited by 25 publications

(17 citation statements)

References 31 publications

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“…Recently there has been some interest towards using some of the self interference cancellation techniques developed for full-duplex communication in the context of Non Orthogonal Multiple Access cellular topologies [2,21,81] for cancelling inter-node interference in the near-far scenario. Full-Duplex techniques have also been proposed for defense and security applications [26,37,87] where downlink transmit signal from the full duplex base station is used to jam the reception at an eavesdropper trying to sniff the authenticated user uplink signals.…”

Section: Discussionmentioning

confidence: 99%

Full Duplex Radios

Singh

Gadre

Kumar

2020

Proceedings of the 19th ACM Workshop on Hot Topics in Networks

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Full duplex communication has been well explored in the past decade, with several physical layer designs proposed for effectively doubling the throughput of mobile devices. However, these systems are far from being well-deployed in the Wi-Fi and cellular applications, where most of the research has been done. In this paper, we investigate some of the fundamental pragmatic challenges in deploying full duplex that explain the reluctance from industry players in deploying this feature in commercial end-user devices and base stations at a large scale. Upon doing so, we identify that the problems lie not quite at the radio layer-but at layers below and above it. At the hardware layer, we find that the power and complexity of IC-implementations of full duplex far exceeds that of other existing technologies that achieve similar throughput gain, such as multiuser MIMO. We further identified how higher-layer cellular and Wi-Fi traffic patterns and MAC protocols are fundamentally ill-suited to the full duplex paradigm. We report empirical analysis from the power consumption of an IC-implementation of a full duplex cancellation circuit, demonstrating that full duplex cancellation circuitry would consume at least 57% more power than a MIMO system achieving identical throughput gains. We also show how current traffic patterns reduce the benefits of full duplex to 1.25× instead of the expected 2×. CCS CONCEPTS • Networks → Network performance analysis; Network components; • Theory of computation → Circuit complexity; • Hardware → Integrated circuits; Circuits power issues.

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Section: Discussionmentioning

confidence: 99%

Full Duplex Radios

Singh

Gadre

Kumar

2020

Proceedings of the 19th ACM Workshop on Hot Topics in Networks

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“…We discuss the feasibility of the KKT condition for the NDR network given in (19) to (38). In the first step, we examine those in (29), (30), (31), (32) and (38). Since P 1 , P 2 , P 3 and P 4 are positive numbers which ensures data transmission is performed in both the upper and the lower branches, λ 6 , λ 7 , λ 8 and λ 9 must be zeros undoubtedly.…”

Section: Appendix Bmentioning

confidence: 99%

“…The gain from FD is shown, and the timing for switching between half-duplex (HD) and FD is also discussed. Last but not least, the authors in [30]- [33] combine a new energy-harvesting (EH) technique with the concept of simultaneous wireless information and power transfer (SWIPT) to reduce the total energy consumption of the network. The focus is how EH/SWIPT can benefit the network in terms of different performance measures.…”

Section: Introductionmentioning

confidence: 99%

Joint Power Allocation for NOMA-Based Diamond Relay Networks With and Without Cooperation

Huang

Lee

Sou

2020

IEEE Open J. Commun. Soc.

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Non-orthogonal multiple access (NOMA)-based diamond relaying (NDR) is an efficient approach for combining NOMA and relaying techniques in such a way as to enhance the achievable rate from the source to the destination in the network. This paper examines the problem of joint power allocation among all the transmission phases during the operation of such networks. Based on the Karush-Kuhn-Tucker (KKT) condition and the second-order sufficient condition (SOSC), at least the local optimal solution is derived and analyzed. In addition, a new protocol for NDR networks based on cooperative communications is introduced and the associated joint power-allocation problem is examined. It is shown that this cooperative NDR (C-NDR) network further improves the achievable rate in some typical placements of the relays. Simulation results verify the correctness of the deviation and confirm the effectiveness of the proposed joint power-allocation method for both NDR and C-NDR networks. INDEX TERMS Non-orthogonal multiple access (NOMA), relay networks, NOMA-based diamond relaying (NDR), cooperative communications, Karush-Kuhn-Tucker (KKT) condition, second-order sufficient condition (SOSC), joint power allocation, achievable rate.

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“…The outage behavior and ergodic rate of NOMA users were investigated where the users were deployed randomly [8]. In addition, the power transfer have been applied to cooperative NOMA from the perspective of enhancing spectrum efficiency and energy efficiency [16,17]; the main feature is that the user relay harvests energy from BS. Especially, the system performance of [16] was comprehensively analyzed with considering DF and amplify-and-forward (AF) protocols.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, the power transfer have been applied to cooperative NOMA from the perspective of enhancing spectrum efficiency and energy efficiency [16,17]; the main feature is that the user relay harvests energy from BS. Especially, the system performance of [16] was comprehensively analyzed with considering DF and amplify-and-forward (AF) protocols. Moreover, cooperative NOMA schemes with dedicated relays have been widely investigated.…”

Section: Introductionmentioning

confidence: 99%

Performance Analysis of Cooperative NOMA Systems with Incremental Relaying

Wang

Peng

Pei

et al. 2020

Wireless Communications and Mobile Computing

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In this paper, we investigate the performance of the non-orthogonal multiple access (NOMA) system with incremental relaying, where the relay is employed with amplify-and-forward (AF) or decode-and-forward (DF) protocols. To characterize the outage behaviors of the incremental cooperative NOMA (ICN) system, new closed-form expressions of both exact and asymptotic outage probability for two users are derived. In addition, the performance of the conventional cooperative NOMA (CCN) system is analyzed as a benchmark for the the purpose of comparison. We confirm that the outage performance of the distant user is enhanced when ICN system is employed. Numerical results are presented to demonstrate that (1) the near user of the ICN system achieves better outage behavior than that of the CCN system in the low signal-to-noise ratio (SNR) region; (2) the outage performance of distant user for the DF-based ICN system is superior to that of the AF-based ICN system when the system works in cooperative NOMA transmission mode; and (3) in the low SNR, the throughput of the ICN system is higher than that of the CCN system. authors of [9] have researched the performance of a downlink single-cell NOMA network when assuming imperfect channel state information (CSI) and second-order statistics. Furthermore, the authors in [10] consider the scenario that each user only feedback one bit of its CSI to a base station (BS) and analyzed the outage performance. Apart from these researches, there are a lot of studies on improving the secrecy performance of multiple users [11,12], where the external and internal eavesdropping scenarios have been considered. Up to now, NOMA has been extended to cooperative communication systems [13, 14], as the higher diversity and extended coverage can be obtained in wireless networks. The authors have analyzed the outage performance of NOMA system with decode and forward (DF) relay employing full-duplex (FD) and half-duplex (HD) mode, where the near user was selected as a relay to deliver information and improve transmission reliability of distance users [15]. Inspired by this, simultaneous wireless information and

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Full-Duplex User Relaying for NOMA System With Self-Energy Recycling

Cited by 25 publications

References 31 publications

Full Duplex Radios

Full Duplex Radios

Joint Power Allocation for NOMA-Based Diamond Relay Networks With and Without Cooperation

Performance Analysis of Cooperative NOMA Systems with Incremental Relaying

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