Improving small cell capacity with common-carrier full duplex radios

Goyal, Sanjay; Liu, Pei; Panwar, Shivendra S.; DiFazio, Robert A.; Yang, Rui; Li, Jialing; Bala, Erdem

doi:10.1109/icc.2014.6884111

Cited by 95 publications

(89 citation statements)

References 8 publications

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“…RELATED WORKS The impact of FD radios on cellular systems has been analysed recently in [6], [11], [12], which provide valuable insights into the design aspects and performance of such systems in terms of rate and energy performance. However, the problem of distributed joint power and user-frequency channel allocation in TNFD networks has not been addressed in these works.…”

Section: Introductionmentioning

confidence: 99%

Fast-Lipschitz Power Control and User-Frequency Assignment in Full-Duplex Cellular Networks

Silva

Fodor

Fischione

2017

IEEE Trans. Wireless Commun.

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Abstract-In cellular networks, the three-node full-duplex transmission mode has the potential to increase spectral efficiency without requiring full-duplex capability of users. Consequently, three-node full-duplex in cellular networks must deal with selfinterference and user-to-user interference, which can be managed by power control and user-frequency assignment techniques. This paper investigates the problem of maximizing the sum spectral efficiency by jointly determining the transmit powers in a distributed fashion, and assigning users to frequency channels. The problem is formulated as a mixed-integer nonlinear problem, which is shown to be non-deterministic polynomial-time hard. We investigate a close-to-optimal solution approach by dividing the joint problem into a power control problem and an assignment problem. The power control problem is solved by FastLipschitz optimization, while a greedy solution with guaranteed performance is developed for the assignment problem. Numerical results indicate that compared to the half-duplex mode, both spectral and energy efficiencies of the system are increased by the proposed algorithm. Moreover, results show that the power control and assignment solutions have important, but opposite roles in scenarios with low or high self-interference cancellation. When the self-interference cancellation is high, user-frequency assignment is more important than power control, while power control is essential at low self-interference cancellation. I. INTRODUCTIONIn order to meet the need for explosive data volumes and data rates, wireless network operators seek to enhance the spectral efficiency in lower-frequency bands [1], and to exploit higher-frequency bands such as the millimiter waves. The research and standardization communities are currently studying physical layer technologies, including massive MIMO systems, spectrum sharing in mmWave networks, new waveforms, non-orthogonal multiple access technologies, and full-duplex communications [2], [3].In-band full-duplex (FD) transceivers are expected to improve the attainable spectral efficiency of traditional wireless networks operating with half-duplex (HD) transceivers by a factor of two [3]. Due to recent advancements in mitigating the inherent self-interference (SI) by means of passive suppression, analog and/or digital cancellation, in-band FD technology is quickly approaching the phase of commercial deployments in low-power wireless networks [4].

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Section: Introductionmentioning

confidence: 99%

Fast-Lipschitz Power Control and User-Frequency Assignment in Full-Duplex Cellular Networks

Silva

Fodor

Fischione

2017

IEEE Trans. Wireless Commun.

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“…We assume that each PU is equipped with N receive antennas. 3 The channel state information (CSI) of the self-interference channel can be acquired by using pilot signals. Since the pilot signal of a FD node is echoed back to itself, and the received power of this echoed-backed pilot signal is very high (due to small distances between transmit and receive antennas of a node), the self-interference channel can be estimated with high accuracy [1].…”

Section: (A)mentioning

confidence: 99%

“…We compare the proposed algorithm with the HD algorithm under the 3GPP LTE specifications for small cell deployments [62]. We consider small cells, since they are considered to be suitable for deployment of FD technology due to low transmit powers, short transmission distances and low mobility [2], [3], [63]. A single hexagonal cell having a BS in the center with M 0 = 2 transmit and N 0 = 2 receive antennas with randomly distributed K = 3 UL and J = 3 DL users equipped with 2 antennas is simulated.…”

Section: B Cellular Systemmentioning

confidence: 99%

MSE-Based Transceiver Designs for Full-Duplex MIMO Cognitive Radios

Cırık

Wang

Rong

et al. 2015

IEEE Trans. Commun.

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Abstract-We study two scenarios of full-duplex (FD) multipleinput-multiple-output cognitive radio networks: FD cognitive ad hoc networks and FD cognitive cellular networks. In FD cognitive ad hoc networks (also referred as interference channels), each pair of secondary users (SUs) operate in FD mode and communicate with each other within the service range of primary users (PUs). Each SU experiences not only self-interference but also interuser interference from all other SUs, and all SUs generate interference on PUs. We address two optimization problems: one is to minimize the sum of mean-squared errors (MSE) of all estimated symbols, and the other is to minimize the maximum per-SU MSE of estimated symbols, both of which are subject to power constraints at SUs and interference constraints projected to each PU. We show that these problems can be cast as a second-order cone programming, and joint design of transceiver matrices can be obtained through an iterative algorithm. Moreover, we show that the proposed algorithm is not only applicable to interference channels but also to FD cellular systems, in which a base station operating in FD mode simultaneously serves multiple uplink and downlink users, and it is shown to outperform HD scheme significantly.

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“…For a scenario where only APs are IBFD capable with 85 dB SI cancellation capability, the throughput was improved by 69% in DL and 81% in UL. But the work in [12] is limited to a single-cell scenario. The authors of [13] studied a multi-cell scenario where only APs are IBFD capable with intelligent scheduler, power allocation, and selection of MSs that maximize the throughput.…”

Section: Introductionmentioning

confidence: 99%

“…As we discussed earlier, it is far from being a realistic assumption considering the size limitation of the handheld devices. In [12], a hybrid scheduler was proposed that shifts between the IBFD and half duplex based on the best available circumstances. For a scenario where only APs are IBFD capable with 85 dB SI cancellation capability, the throughput was improved by 69% in DL and 81% in UL.…”

Section: Introductionmentioning

confidence: 99%

A performance comparison of in-band full duplex and dynamic TDD for 5G indoor wireless networks

Al-Saadeh

Sung

2017

J Wireless Com Network

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In-band full duplex has emerged as a solution for high data rate and low access delay for 5G wireless networks after its feasibility has been demonstrated. However, the impact of the in-band full duplex on the system-level performance of multi-cell wireless networks has not been investigated thoroughly. In this paper, we conduct an extensive simulation study to investigate the performance of in-band full duplex for indoor 5G small cell wireless networks. Particularly, we compare the in-band full duplex with static and dynamic time division duplexing schemes which require much less hardware complexity. We examine the effects of beamforming and interference cancellation under various traffic demands and asymmetry situations in the performance comparison. Our objective is to identify under which condition and with which technology support the in-band full duplex becomes advantageous over the simpler duplexing schemes. Numerical results indicate that for highly utilized wireless networks, in-band full duplex should be combined with interference cancellation and beamforming in order to achieve a performance gain over traditional duplexing schemes. Only then in-band full duplex is considered to be advantageous at any number of active mobile stations in the network and any downlink to uplink traffic proportion. Our results also suggest that in order to achieve a performance gain with the in-band full duplex in both links, the transmit power of the access points and the mobile stations should be comparable.

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Improving small cell capacity with common-carrier full duplex radios

Cited by 95 publications

References 8 publications

Fast-Lipschitz Power Control and User-Frequency Assignment in Full-Duplex Cellular Networks

Fast-Lipschitz Power Control and User-Frequency Assignment in Full-Duplex Cellular Networks

MSE-Based Transceiver Designs for Full-Duplex MIMO Cognitive Radios

A performance comparison of in-band full duplex and dynamic TDD for 5G indoor wireless networks

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