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Spectral Efficient and Fair User Pairing for Full-Duplex Communication in Cellular Networks
KTH, School of Electrical Engineering (EES), Automatic Control.ORCID iD: 0000-0002-4503-4242
KTH, School of Electrical Engineering (EES), Automatic Control. Ericsson Research.ORCID iD: 0000-0002-2289-3159
KTH, School of Electrical Engineering (EES), Automatic Control.ORCID iD: 0000-0001-9810-3478
2016 (English)In: IEEE Transactions on Wireless Communications, ISSN 1536-1276, E-ISSN 1558-2248, Vol. 15, no 11, 7578-7593 p.Article in journal (Refereed) Published
Abstract [en]

—A promising new transmission mode in cellular networks is the three-node full-duplex mode, which involves a base station with full-duplex capability and two half-duplex user transmissions on the same frequency channel for uplink and downlink. The three-node full-duplex mode can increase spectral efficiency, especially in the low transmit power regime, without requiring full-duplex capability at user devices. However, when a large set of users is scheduled in this mode, self-interference at the base station and user-to-user interference can substantially hinder the potential gains of full-duplex communications. This paper investigates the problem of grouping users to pairs and assigning frequency channels to each pair in a spectral efficient and fair manner. Specifically, the joint problem of user uplink/downlink frequency channel pairing and power allocation is formulated as a mixed integer nonlinear problem that is solved by a novel joint fairness assignment maximization algorithm. Realistic system level simulations indicate that the spectral efficiency of the users having the lowest spectral efficiency is increased by the proposed algorithm, while a high ratio of connected users in different loads and self-interference levels is maintained.

Place, publisher, year, edition, pages
IEEE Press, 2016. Vol. 15, no 11, 7578-7593 p.
Keyword [en]
full-duplex, power control, channel assignment, spectral efficient, cellular communications
National Category
Communication Systems
Research subject
Electrical Engineering; Information and Communication Technology
Identifiers
URN: urn:nbn:se:kth:diva-192314DOI: 10.1109/TWC.2016.2604802ISI: 000388674700026Scopus ID: 2-s2.0-84988354730OAI: oai:DiVA.org:kth-192314DiVA: diva2:967628
Projects
Wireless@KTH BUSE
Funder
Lars Hierta Memorial Foundation, FO20150976Swedish National Infrastructure for Computing (SNIC)Wireless@kth, BUSE
Note

QC 20161019

Available from: 2016-09-09 Created: 2016-09-09 Last updated: 2017-09-18Bibliographically approved
In thesis
1. Spectral Efficiency and Fairness Maximization in Full-Duplex Cellular Networks
Open this publication in new window or tab >>Spectral Efficiency and Fairness Maximization in Full-Duplex Cellular Networks
2017 (English)Licentiate thesis, comprehensive summary (Other academic)
Abstract [en]

Future cellular networks, the so-called 5G, are expected to provide explosive data volumes and data rates. To meet such a demand, the research communities are investigating new wireless transmission technologies. One of the most promising candidates is in-band full-duplex communications. These communications are characterized by that a wireless device can simultaneously transmit and receive on the same frequency channel. In-band full-duplex communications have the potential to double the spectral efficiencywhen compared to current half duplex systems. The traditional drawback of full-duplex was the interference that leaks from the own transmitter to its own receiver, the so- called self-interference, which renders the receiving signal unsuitable for communication.However, recent advances in self-interference suppression techniques have provided high cancellation and reduced the self-interference to noise floor levels, which shows full-duplex is becoming a realistic technology component of advanced wireless systems.

Although in-band full-duplex promises to double the data rate of existing wireless technologies, its deployment in cellular networks is challenging due to the large number of legacy devices working in half-duplex. A viable introduction in cellular networks is offered by three-node full-duplex deployments, in which only the base stations are full-duplex, whereas the user- or end-devices remain half-duplex. However, in addition to the inherent self-interference, now the interference between users, the user-to-user interference, may become the performance bottleneck, especially as the capability to suppress self-interference improves. Due to this new interference situation, user pairing and frequency channel assignment become of paramount importance, because both mechanisms can help to mitigate the user-to-user interference. It is essential to understand the trade-offs in the performance of full-duplex cellular networks, specially three-node full-duplex, in the design of spectral and energy efficient as well as fair mechanisms.

This thesis investigates the design of spectral efficient and fair mechanisms to improve the performance of full-duplex in cellular networks. The novel analysis proposed in this thesis suggests centralized and distributed user pairing, frequency channel assignment and power allocation solutions to maximize the spectral efficiency and fairness in future full-duplex cellular networks. The investigations are based on distributed optimization theory with mixed integer-real variables and novel extensions of Fast-Lipschitz optimization. The analysis sheds lights on two fundamental problems of standard cellular networks, namely the spectral efficiency and fairness maximization, but in the new context of full-duplex communications. The results in this thesis provide important understanding in the role of user pairing, frequency assignment and power allocation, and reveal the special behaviourbetween the legacy self-interference and the new user-to-user interference. This thesis can provide input to the standardization process of full-duplex communications, and have the potential to be used in the implementation of future full-duplex in cellular networks.

Place, publisher, year, edition, pages
Stockholm: KTH Royal Institute of Technology, 2017
Series
TRITA-EE, ISSN 1653-5146 ; 2017:027
Keyword
full-duplex, power control, user assignment, cellular networks, fairness, spectral efficiency
National Category
Telecommunications
Research subject
Telecommunication
Identifiers
urn:nbn:se:kth:diva-204607 (URN)978-91-7729-347-7 (ISBN)
Presentation
2017-04-28, Q2, Osquldas Väg 10, Stockholm, 10:00 (English)
Opponent
Supervisors
Note

QC 20170403

Available from: 2017-04-05 Created: 2017-04-03 Last updated: 2017-04-05Bibliographically approved

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