CoMPflex: CoMP for In-Band Wireless Full Duplex

Thomsen, Henning; Popovski, Petar; Carvalho, Elisabeth de; Pratas, Nuno K.; Kim, Dong-Min; Boccardi, Federico

doi:10.1109/lwc.2015.2510636

Cited by 31 publications

(20 citation statements)

References 9 publications

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“…Cross-link cooperation: If both users have cross directional traffic, the UL-gNB can exploit information provided from the DL-BS via Xn interface to execute Interference Cancellation (IC) to perform IC-CoMP [14]. It is assumed that UL and DL share the same frequency.…”

Section: Coordinated Multi-point Connectivity For Low-latencymentioning

confidence: 99%

Multi-Channel Access Solutions for 5G New Radio

Mahmood

Laselva²,

Palacios

et al. 2019

2019 IEEE Wireless Communications and Networking Conference Workshop (WCNCW)

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Multi-channel access is a family of multi-service radio resource management solutions that enable a user equipment to aggregate radio resources from multiple sources. The objective is multi-fold: throughput enhancement through access to a larger bandwidth tailored for enhanced mobile broadband, reliability improvement by increasing the diversity order and/or coordinated transmission/reception tailored for ultra-reliable low latency communication service classes, as well as flexibility and load balancing improvement by decoupling the downlink and the uplink access points, for both service classes. This paper presents several multi-channel access solutions for 5G New Radio multi-service scenarios. In particular, throughput enhancement and latency reduction concepts like multi-connectivity, carrier aggregation, downlink-uplink decoupled access and coordinated multi-point connectivity are discussed. Moreover, novel design solutions exploiting these concepts are proposed. Numerical evaluation of the introduced solutions indicates significant performance gains over state-ofthe-art schemes; for example, our proposed component carrier selection mechanism leads to a median throughput gain of up to 100% by means of an implicit load balance. Therefore, the proposed multi-channel access solutions have the potential to be key multi-service enablers for 5G New Radio.

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Section: Coordinated Multi-point Connectivity For Low-latencymentioning

confidence: 99%

Multi-Channel Access Solutions for 5G New Radio

Mahmood

Laselva²,

Palacios

et al. 2019

2019 IEEE Wireless Communications and Networking Conference Workshop (WCNCW)

Self Cite

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“…In [6], the performance of cloud radio access network (C-RAN) with CCFD remote antenna units (RAUs) was studied by using an information theoretic approach and the analytical results confirmed the significant potential advantages of the C-RAN architecture for in-band full-duplex systems. Coordinated multi-point transmissions (CoMP) for in-band wireless full-duplex (CoMPflex) was proposed in [7], by considering emulation of a full-duplex cellular base-station (BS) and using two spatially separated and coordinated half-duplex BSs. The simulation results in [8] have shown that due to the increased density of BSs, the outage performances of both uplink and downlink in CoMPflex are better than that in cellular systems with CCFD BSs.…”

Section: Introductionmentioning

confidence: 99%

Performance of Network-Assisted Full-Duplex for Cell-Free Massive MIMO

Wang

Zhu

et al. 2020

IEEE Trans. Commun.

112

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Network assisted full-duplex (NAFD) is a spatial-division duplex technique for future wireless networks with cellfree massive multiple-input multiple-output (CF massive MIMO) network, where a large number of remote antenna units (RAUs), either using half-duplex or full-duplex, jointly support truly flexible duplex including time-division duplex, frequency-division duplex and full duplex on demand of uplink and downlink traffic by using network MIMO methods. With NAFD, bi-directional data rates of the wireless network could be increased and end-to-end delay could be reduced. In this paper, the spectral efficiency of NAFD communications in CF massive MIMO network with imperfect channel state information (CSI) is investigated under spatial correlated channels. Based on large dimensional random matrix theory, the deterministic equivalents for the uplink sum-rate with minimum-mean-square-error (MMSE) receiver as well as the downlink sum-rate with zero-forcing (ZF) and regularized zero-forcing (RZF) beamforming are derived. Numerical results show that under various environmental settings, the deterministic equivalents are accurate in both a large-scale system and system with a finite number of antennas. It is also shown that with the downlink-touplink interference cancellation, the uplink spectral efficiency of CF massive MIMO with NAFD could be improved.The spectral efficiencies of NAFD with different duplex configurations such as in-band full-duplex, and half-duplex are compared. With the same total numbers of transmit and receive antennas, NAFD with half-duplex RAUs offers a higher spectral efficiency. To alleviate the uplink-to-downlink interference, a novel genetic algorithm based user scheduling strategy (GAS) is proposed. Simulation results show that the achievable downlink sum-rate by using the GAS is greatly improved compared to that by using the random user scheduling. Index TermsNetwork-assisted full-duplex, cell-free massive MIMO, full-duplex, spectral efficiency, deterministic equivalent, scheduling Recently, a novel concept called cell-free (CF) massive multiple-input multiple-output (MIMO) was proposed to overcome the inter-cell interference by innovating the cellular architecture [18], [19]. Compared to small-cell network, CF massive MIMO potentially has a large spectral efficiency [19]. From the point of view of baseband transmission, the performance gain of CF massive MIMO comes from the joint processing of a large number of geographically distributed RAUs [20]. Our recent prototyping system in large-scale distributed MIMO has demonstrated that the data rate of 10Gbps could be achieved by a 128x128 large-scale distributed MIMO (or CF massive MIMO) with 100MHz bandwidth [21]. Different from the existing works, in this paper, we propose a network-assisted full duplex (NAFD) to unify the flexible duplex, hybrid-duplex, full-duplex, and other duplex methods [7], [14], [15], [22] under the CF massive MIMO network, and solve the CLI problem to achieve truly flexible duplex, which is essential in the 5G NR [...

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“…By employing a combination of analog and digital cancellation techniques [2], [3], it was shown that as much as 110 dB of SI cancellation is achieved. Another approach to avoid SI is to emulate a FD base station using two spatially separated and coordinated half duplex (HD) base stations [4]. The performance of FD is investigated in [5], [6] using tools from stochastic geometry.…”

Section: Introduction and Related Workmentioning

confidence: 99%

Resource optimization and power allocation in in-band full duplex-enabled non-orthogonal multiple access networks

Elbamby

Bennis

Saad

et al. 2017

IEEE J. Select. Areas Commun.

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Abstract-In this paper, the problem of uplink (UL) and downlink (DL) resource optimization, mode selection and power allocation is studied for wireless cellular networks under the assumption of in-band full duplex (IBFD) base stations, nonorthogonal multiple access (NOMA) operation, and queue stability constraints. The problem is formulated as a network utility maximization problem for which a Lyapunov framework is used to decompose it into two disjoint subproblems of auxiliary variable selection and rate maximization. The latter is further decoupled into a user association and mode selection (UAMS) problem and a UL/DL power optimization (UDPO) problem that are solved concurrently. The UAMS problem is modeled as a many-to-one matching problem to associate users to small cell base stations (SBSs) and select transmission mode (half/fullduplex and orthogonal/non-orthogonal multiple access), and an algorithm is proposed to solve the problem converging to a pairwise stable matching. Subsequently, the UDPO problem is formulated as a sequence of convex problems and is solved using the concave-convex procedure. Simulation results demonstrate the effectiveness of the proposed scheme to allocate UL and DL power levels after dynamically selecting the operating mode and the served users, under different traffic intensity conditions, network density, and self-interference cancellation capability. The proposed scheme is shown to achieve up to 63% and 73% of gains in UL and DL packet throughput, and 21% and 17% in UL and DL cell edge throughput, respectively, compared to existing baseline schemes.

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CoMPflex: CoMP for In-Band Wireless Full Duplex

Cited by 31 publications

References 9 publications

Multi-Channel Access Solutions for 5G New Radio

Multi-Channel Access Solutions for 5G New Radio

Performance of Network-Assisted Full-Duplex for Cell-Free Massive MIMO

Resource optimization and power allocation in in-band full duplex-enabled non-orthogonal multiple access networks

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