Interference avoidance with dynamic vertical beamsteering in real deployments

Halbauer, Hardy; Saur, Stephan; Koppenborg, Johannes; Hoek, Cornelis

doi:10.1109/wcncw.2012.6215509

Cited by 36 publications

(17 citation statements)

References 3 publications

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“…Therefore, it is not straightforward whether the overall BE performance as well as the cell edge UE can be improved. The preliminary study in [93] shows that dynamic vertical beam pattern adaptation can provide BE performance gains even with either simplified or suboptimum approaches. Meanwhile, there exists some work on coordinated vertical beamforming with well-known ICIC schemes applied in LTE such as FFR [94].…”

Section: A Inter-cell Interference Coordinationmentioning

confidence: 99%

Survey of Large-Scale MIMO Systems

Zheng

Zhao

Mei

et al. 2015

IEEE Commun. Surv. Tutorials

282

172

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Abstract-The escalating teletraffic growth imposed by the proliferation of smartphones and tablet computers outstrips the capacity increase of wireless communications networks. Furthermore, it results in substantially increased carbon dioxide emissions. As a powerful countermeasure, in the case of full-rank channel matrices, MIMO techniques are potentially capable of linearly increasing the capacity or decreasing the transmit power upon commensurately increasing the number of antennas. Hence, the recent concept of large-scale MIMO (LS-MIMO) systems has attracted substantial research attention and been regarded as a promising technique for next-generation wireless communications networks. Therefore, this paper surveys the state of the art of LS-MIMO systems. First, we discuss the measurement and modeling of LS-MIMO channels. Then, some typical application scenarios are classified and analyzed. Key techniques of both the physical and network layers are also detailed. Finally, we conclude with a range of challenges and future research topics.Index Terms-Large-scale MIMO, 3-D MIMO, channel modeling, physical layer, networking.

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Section: A Inter-cell Interference Coordinationmentioning

confidence: 99%

Survey of Large-Scale MIMO Systems

Zheng

Zhao

Mei

et al. 2015

IEEE Commun. Surv. Tutorials

282

172

View full text Add to dashboard Cite

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“…The interference among the cells with different coverage becomes harder to be managed and it exacerbates the performance. As a promising method to restrain interference, 3D Beamforming (3D-BF) is proposed in recent years [4][5][6][7][8][9]. By steering the azimuth and elevation angles of a thin beam to the UE served, 3D BF can increase useful signal and decrease interference.…”

Section: Introductionmentioning

confidence: 99%

“…However, it is not effective for UEs in the same horizontal direction but different vertical directions. In recent years, vertical plane beam control 978-1-4799-4719-5114/$31.00 ©2014 IEEE 222 has been discussed [6][7][8][9]. Via adjusting antenna tilt, served UEs can gain stronger useful signal power and interference can be eliminated effectively.…”

Section: Introductionmentioning

confidence: 99%

A 3D-beamforming scheme for throughput optimization in Heterogeneous Network

Tang

Cui

Zou

et al. 2014

2014 IEEE 3rd International Conference on Cloud Computing and Intelligence Systems

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Beamforming (BF) is an effective method to restrain interference in cellular communication systems. Steering beam direction in 3D space can improve useful signal power that user equipments (UEs) received and eliminate interference effectively. In this paper, we focus on how to choose 3D-BF angles of beam and propose a cooperative angle selecting scheme based on maximum signal to leakage plus noise ratio (SLNR) (CAS-MSLNR) to increase sum throughput of Heterogeneous Network (HetNet). In the proposed scheme, 3D-BF angles of every node in the same group node (ON) are chosen preliminarily by centralized coordination method to restrain intra-ON interference. Then, in each ON, the macro cell base station (MBS) adjusts the 3D-BF angles to maximize SLNR. Simulation result demonstrates that CAS-MSLNR 3D BF outperforms 2D-BF and UE-specific 3D-BF in terms of sum throughput and cell-edge throughput.

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“…It can also be used to suppress the intercell interference in a multicell setup, e.g., by using a large tilt at the BS [5], [6]. In [7], the authors have proposed a scheme in which the tilt selection is coordinted among the neighboring cells to achieve a tradeoff between maximizing the desired signal power at an intended user and the intercell interference mitigation.…”

Section: Introductionmentioning

confidence: 99%

“…In [7], the authors have proposed a scheme in which the tilt selection is coordinted among the neighboring cells to achieve a tradeoff between maximizing the desired signal power at an intended user and the intercell interference mitigation. In addition, switched beam tilting has also been shown to be a promising adaptive tilting scheme which is of lower complexity compared to userspecific tilting [4]- [6]. These previous studies are, however, only based on system-level simulation and do not provide any guideline for, e.g., how to determine vertical regions' borders, how to choose the antenna tilts for different regions, or how to fairly schedule the transmission to different regions.…”

Section: Introductionmentioning

confidence: 99%

Throughput optimization in MU-MIMO systems via exploiting bs antenna tilt

Seifi

Coldrey

Svensson

2012

2012 IEEE Globecom Workshops

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In this paper, we propose a novel framework to enhance the throughput in a single-cell multiuser multiple-input multiple-output (MU-MIMO) system via adaptive base station (BS) antenna tilting. The key idea is to partition the cell into so-called vertical regions and to apply one out of a finite number of tilt and vertical half-power beamwidth (HPBW) pairs at the BS when serving each vertical region. This strategy results in an increased average received signal-to-noise ratio (SNR) over the coverage area. A scheduler is then employed to schedule the transmission to one of the vertical regions at each time-slot with the objective to maximize a suitable utility function of users' achievable throughput. MU-MIMO zero-forcing beamforming in the horizontal plane is used at the BS to serve the users in each vertical region. Simulation results show that the proposed adaptive BS tilting scheme is a promising approach to provide a noticeable throughput gain compared to a conventional scheme employing a fixed tilt at the BS. The proposed framework also achieves a superior performance-complexity tradeoff compared to a conventional system in which the tilt can be adapted to the location of the served users at each time-slot.

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Interference avoidance with dynamic vertical beamsteering in real deployments

Cited by 36 publications

References 3 publications

Survey of Large-Scale MIMO Systems

Survey of Large-Scale MIMO Systems

A 3D-beamforming scheme for throughput optimization in Heterogeneous Network

Throughput optimization in MU-MIMO systems via exploiting bs antenna tilt

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