Performance Evaluation of Coordinated Beamforming in LTE-Advanced Systems
Author(s): Wolz,B.
Chair of Communication Networks (ComNets), Faculty 6, RWTH Aachen University
Contact: publications@comnets.rwth-aachen.de
Ph. D. Dissertation
, ABMT
72
,
p.
183
, ISBN: 978-3-95886-014-8
Wissenschaftsverlag Mainz,
Year: 2014
On page(s):183
ISBN: 978-3-95886-014-8
Abstract In telecommunications, new application areas in social, private and business sector are developing, such as eHealth, Connected Car, Mobile Payment, Smart Energy, Cloud Media, Maschine-2-Maschine communication. The new services will demand the Internet to be available everywhere and will contribute to the current exponential growth in data traffic. In wireless communication systems such as IMT- Advanced systems, key features to increase mean spectral efficiencies are integrating multi antenna techniques and mitigating inter-cell interference by coordination. On the one hand, beamforming is the most promising MIMO technique in macro cell scenarios since it allows for both increased system capacity and extended cell range. On the other hand, coordination of neighbour cells can further improve beamforming by overcoming the so called flash light effect and mitigating inter-cell interference by avoiding harmful beam combinations. In this thesis, a beam coordination algorithm is designed called “Synchronised Cycles of Coordinated Beams” which aims to achieve ubiquitous high rate coverage by reducing interference, especially at the cell edge. Several coordinated beamforming schemes are discussed and evaluated such as the coordination of cells of the same base station, the coordination in systems with adaptive beamforming using multiple beams (SDMA), and region coordination. Beam coordination schemes are quantitatively analytically evaluated on system level in cellular scenario in the framework of the ITU-R evaluation guidelines, the LTE-Advanced standard and detailed models of beamforming techniques. The evaluation model comprises a detailed antenna and channel model and considers MAC and PHY layer functions, such as link adaptation, error recovery, and protocol overhead. Important parameters of system configurations are indentified and their impact on the performance of beam coordination is studied, such as the scheduling strategy, frequency reuse scheme, and number of available beams. The results can assist operators and manufacturers to decide under which circumstances beam coordination schemes can be employed most beneficially in terms of cell spectral efficiency and cell edge user spectral efficiency.
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@PHDTHESIS{DissWolz2014
AUTHOR = {Wolz,B.} ,
TITLE = {Performance Evaluation of Coordinated Beamforming in LTE-Advanced Systems} ,
YEAR = {2014} ,
MONTH = {Feb} ,
VOLUME = {72},
PAGES = {183},
PUBLISHER = {Wissenschaftsverlag Mainz},
ADDRESS = {Aachen, Germany},
SERIES = {ABMT},
AFFILIATION = {Chair of Communication Networks (ComNets), Faculty 6, RWTH Aachen University},
ISBN = {978-3-95886-014-8 },
URL = {https://www.comnets.rwth-aachen.de}