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A Multi-Stream Pricing-Based Precoding and Power Control Algorithm for Dynamic TDD Networks
KTH, School of Electrical Engineering and Computer Science (EECS), Intelligent systems, Decision and Control Systems (Automatic Control). Ericsson Research, Stockholm, Sweden.ORCID iD: 0000-0002-2289-3159
2019 (English)In: 2019 IEEE Conference on Standards for Communications and Networking, CSCN 2019, Institute of Electrical and Electronics Engineers Inc. , 2019Conference paper, Published paper (Refereed)
Abstract [en]

Dynamic time division duplexing (DTDD) cellular networks enable to adapt the number of uplink and downlink time slots to the prevailing traffic demands in each cell at the expense of base station (BS)-to-BS and user equipment (UE)-to-UE interference. Recognizing the importance of mitigating the effect of these additional interference types, previous works proposed multicell coordinated beamforming to realize the full potential of DTDD systems that employ multiple antennas at the BSs. Unfortunately, the previously proposed mechanisms suffer from slow convergence, which renders such schemes impractical in fast fading and highly mobile environments. In this paper, we formulate the multicell multi-stream DTDD beamforming problem as an optimization task, and propose a near-optimal pricing-based algorithm to determine the beam directions and transmit power levels for each stream at the BSs. The proposed distributed precoding and power control algorithm not only improves the downlink performance, but it also substantially mitigates the BS-to-BS interference levels, and thereby improves the uplink performance as well. Simulation results indicate that the proposed algorithm exhibits faster convergence than previously proposed near-optimal schemes at the expense of some small performance degradation in terms of the achieved signal-to-interference-plus-noise-ratio (SINR).

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers Inc. , 2019.
Keywords [en]
Beamforming, Costs, Mobile telecommunication systems, Signal interference, Signal to noise ratio, Time division multiplexing, Coordinated beamforming, Distributed pre-coding, Downlink performance, Interference level, Mobile environments, Near-optimal pricing, Performance degradation, Signal to interference plus noise ratio, Power control
National Category
Control Engineering
Identifiers
URN: urn:nbn:se:kth:diva-268038DOI: 10.1109/CSCN.2019.8931407Scopus ID: 2-s2.0-85077821527ISBN: 9781728108643 (print)OAI: oai:DiVA.org:kth-268038DiVA, id: diva2:1416168
Conference
2019 IEEE Conference on Standards for Communications and Networking, CSCN 2019, Granada, Spain, October 28-30, 2019
Note

QC 20200322

Available from: 2020-03-22 Created: 2020-03-22 Last updated: 2020-03-22Bibliographically approved

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