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Multi-Cell Interference Exploitation: Enhancing the Power Efficiency in Cell Coordination

Wei, Z; Christos, M; Kat-kit, W; Xin, K; (2020) Multi-Cell Interference Exploitation: Enhancing the Power Efficiency in Cell Coordination. IEEE transaction on wireless communications , 19 (1) pp. 547-562. 10.1109/TWC.2019.2946818. Green open access

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Abstract

In this paper, we propose a series of novel coordination schemes for multi-cell downlink communication. Starting from full base station (BS) coordination, we first propose a fully-coordinated scheme to exploit beneficial effects of both inter-cell and intra-cell interference, based on sharing both channel state information (CSI) and data among the BSs. To reduce the coordination overhead, we then propose a partiallycoordinated scheme where only intra-cell interference is designed to be constructive while inter-cell is jointly suppressed by the coordinated BSs. Accordingly, the coordination only involves CSI exchange and the need for sharing data is eliminated. To further reduce the coordination overhead, a third scheme is proposed, which only requires the knowledge of statistical inter-cell channels, at the cost of a slight increase on the transmission power. For all the proposed schemes, imperfect CSI is considered. We minimize the total transmission power in terms of probabilistic and deterministic optimizations. Explicitly, the former statistically satisfies the users’ signal-to-interferenceplus-noise ratio (SINR) while the latter guarantees the SINR requirements in the worst case CSI uncertainties. Simulation verifies that our schemes consume much lower power compared to the existing benchmarks, i.e., coordinated multi-point (CoMP) and coordinated-beamforming (CBF) systems, opening a new dimension on multi-cell coordination.

Type: Article
Title: Multi-Cell Interference Exploitation: Enhancing the Power Efficiency in Cell Coordination
Open access status: An open access version is available from UCL Discovery
DOI: 10.1109/TWC.2019.2946818
Publisher version: https://doi.org/10.1109/TWC.2019.2946818
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Multi-Cell Coordination, Constructive Interference, Robust Optimization, Power Efficiency
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng
URI: https://discovery.ucl.ac.uk/id/eprint/10083209
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