Power Control for Full-Duplex Relay-Enhanced Cellular Networks With QoS Guarantees

Huang, Xiaoyan; Yang, Kun; Wu, Fan; Leng, Supeng

doi:10.1109/access.2017.2682279

Cited by 12 publications

(8 citation statements)

References 23 publications

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“…Our current paper considers the more general scenario in which the frequency bands of the two communication links can be arbitrarily aligned and their bandwidth ratio is an integer. The considered setting corresponds to the practical interference scenarios in satellite communications [20], [21] and terrestrial communications, e.g., full-duplex relay [32], [33].…”

Section: System Model and Problem Statementmentioning

confidence: 99%

Interference Cancellation, Channel Estimation, and Symbol Detection for Communications on Overlapping Channels

Nguyen

2020

IEEE Access

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In this paper, we propose the joint interference cancellation, fast fading channel estimation, and data symbol detection for a general interference setting where the interfering source and the interfered receiver are unsynchronized and occupy overlapping channels of different bandwidths. The interference must be canceled before the channel estimation and data symbol detection of the desired communication are performed. To this end, we have to estimate the Effective Interference Coefficients (EICs) and then the desired fast fading channel coefficients. We construct a two-phase framework where the EICs and desired channel coefficients are estimated using the joint maximum likelihood-maximum a posteriori probability (JML-MAP) criteria in the first phase; and the MAP based data symbol detection is performed in the second phase. Based on this two-phase framework, we also propose an iterative algorithm for interference cancellation, channel estimation and data detection. We analyze the channel estimation error, residual interference, symbol error rate (SER) achieved by the proposed framework. We then discuss how to optimize the pilot density to achieve the maximum throughput. Via numerical studies, we show that our design can effectively mitigate the interference for a wide range of SNR values, our proposed channel estimation and symbol detection design can achieve better performances compared to the existing method. Moreover, we demonstrate the improved performance of the iterative algorithm with respect to the non-iterative counterpart.

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Section: System Model and Problem Statementmentioning

confidence: 99%

Interference Cancellation, Channel Estimation, and Symbol Detection for Communications on Overlapping Channels

Nguyen

2020

IEEE Access

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“…Here, represents the total sum of the received powers from all neighboring BSs. When 0 has a distance and fading strength ∼ exp ( ) from to the neighboring BS , is expressed as = ∑ ∈Φ − (12) where Φ denotes the set of all interfering BSs. Moreover, represents the total sum of the received powers from all other UL users.…”

Section: Downlink Outage Probabilitymentioning

confidence: 99%

“…As a result, coexistence of both UL and DL transmission on the same channel at the same time in the FD cellular network causes 2 Wireless Communications and Mobile Computing so-called interuser interference from UL users to DL users. Therefore, smart interference management techniques are necessary to manage this interuser interference and several algorithms including resource management, power control, user pairing/scheduling, and their optimization have been investigated to enhance performances in terms of system throughput, outage probability, and coverage [9][10][11][12][13][14][15][16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

“…In [11], energy efficient resource allocation was invented to minimize total transmit power in FD cellular networks. Regarding the power control, the transmit powers of the UL UE, BS, and relay were coordinated to mitigate the interference in an FD relay-enhanced cellular network [12]. In [13], an effective power control scheme was proposed to suppress interference between D2D and cellular communications for FD relay-assisted device-to-device communication.…”

Section: Introductionmentioning

confidence: 99%

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Outage Analysis of User Pairing Algorithm for Full-Duplex Cellular Networks

Choi

Noh

2019

Wireless Communications and Mobile Computing

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In a full-duplex (FD) cellular network, a base station transmits data to the downlink (DL) user and receives data from uplink (UL) users at the same time; thereby the interference from UL users to DL users occurs. One of the possible solutions to reduce this interuser interference in the FD cellular network is user pairing, which pairs a DL user with a UL user so that they use the same radio resource at the same time. In this paper, we consider a user pairing problem to minimize outage probability and formulate it as a nonconvex optimization problem. As a solution, we design a low-complexity user pairing algorithm, which first controls the UL transmit power to minimize the interuser interference and then allows the DL user having a worse signal quality to choose first its UL user giving less interference to minimize the outage probability. Then, we perform theoretical outage analysis of the FD cellular network on the basis of stochastic geometry and analyze the performance of the user pairing algorithm. Results show that the proposed user pairing significantly decreases the interuser interference and thus improves the DL outage performance while satisfying the requirement of UL signal-to-interference-plus-noise ratio, compared to the conventional HD mode and a random pairing. We also reveal that there is a fundamental tradeoff between the DL outage and UL outage according to the user pairing strategy (e.g., throughput maximization or outage minimization) in the FD cellular network.

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“…For relays without buffers, a hybrid FD/HD scheme was proposed in [3], outperforming schemes based on either FD or HD relaying. Focusing on multi-user networks, [4] studied power adaptation with QoS guarantees, imposing rate and transmit power constraints. The proposed algorithms allow the efficient integration of FD relaying by mitigating LI and uplink/downlink interference.…”

Section: Introductionmentioning

confidence: 99%

Power Adaptation in Buffer-Aided Full-Duplex Relay Networks With Statistical CSI

Νομικός

Charalambous

Vouyioukas

et al. 2018

IEEE Trans. Veh. Technol.

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In networks with multiple wireless nodes and especially in fast changing environments, the continuous acquisition of Channel State Information (CSI) may become infeasible. In this paper, we study the relay selection problem for a cooperative network, where Full-Duplex (FD) relays are equipped with buffers and only statistical CSI is available at the transmitters (CSIT). For this setting, a novel relay selection algorithm is proposed, named HyQoS, relying only on statistical CSIT and performing power adaptation. HyQoS solves an optimization problem for selecting the optimal set of relays. We consider two optimization approaches: 1) minimization of the total power consumed in the network, and 2) maximization of the throughput per energy unit, while guaranteeing a specific Quality of Service (QoS), in terms of Successful Transmission Probability (STP). The power allocation problem is formulated as a nonlinear optimization one, taking into account inter-relay interference and residual loop interference. Numerical results show that HyQoS can reduce the power expenditure and increase the throughput, by using only statistical CSIT.

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Power Control for Full-Duplex Relay-Enhanced Cellular Networks With QoS Guarantees

Cited by 12 publications

References 23 publications

Interference Cancellation, Channel Estimation, and Symbol Detection for Communications on Overlapping Channels

Interference Cancellation, Channel Estimation, and Symbol Detection for Communications on Overlapping Channels

Outage Analysis of User Pairing Algorithm for Full-Duplex Cellular Networks

Power Adaptation in Buffer-Aided Full-Duplex Relay Networks With Statistical CSI

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