Power minimization in multi-tier networks with flexible duplexing

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URI: http://hdl.handle.net/10902/18038
ISBN: 978-1-4799-8131-1
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Autoría
Fanjul Fernández, Jacobo; Santamaría Caballero, Luis IgnacioAutoridad Unican
Fecha
2019
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© 2019 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Publicado en
IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), Brighton, Reino Unido, 2019, 4699-4703.
Editorial
Institute of Electrical and Electronics Engineers Inc.
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Palabras clave
Convex optimization
Discrete optimization
Flexible duplexing
Heterogeneous networks
Power efficiency
Resumen/Abstract
In this paper we present an algorithm to minimize transmit power in multiple-input multiple-output (MIMO) heterogeneous networks (HetNets) with flexible duplexing, a promising strategy that allows the coexistence of uplink and downlink cells within the same time and frequency resource block. First, the proposed algorithm minimizes transmit power for a given uplink/downlink (UL/DL) combination, and afterwards, the optimal solution out of the explored UL/DL combinations is selected. To reduce the computational cost of exploring all the UL/DL settings, we propose a hierarchical switching (HS) approach that considers a reduced subset of transmit directions. By means of Monte Carlo simulations, we show that the proposed technique provides significant power savings with respect to a conventional time-division duplex (TDD) scheme.
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