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Evaluation of Grouping Strategies for an Hierarchical SDMA/TDMA Scheduling Process

Authors
Hoymann, Christian and Ellenbeck, Jan and Pabst, Ralf and Schinnenburg, Marc
Department of Communication Networks (ComNets), Faculty 6, RWTH Aachen University Kontakt: Christian Hoymann

In Proceedings of the IEEE International Conference on Communications 2007, p. 6, Glasgow, UK, 2007.
Publication Date: Jun, 2007
On page(s):6
ISBN: 1-4244-0353-7
Abstract
Modern wireless communication systems, such as the metropolitan area network IEEE 802.16, provide means to support smart antenna techniques. Applying beamforming techniques, adaptive antennas are able to increase cell capacity by reducing inter-cell interference and by allowing concurrent transmissions. However, smart antennas are only beneficial, if the system is able to leverage the advantages, e.g, spatial separability of stations. Additionally, the system has to cope with the disadvantages, e.g., intra-cell interference as well as increased scheduling complexity. The scheduler is one of the most important modules of such systems, since it allocates the radio resources to subscriber stations. Thus, it controls the medium access in the space- and time- (and maybe frequency- and code-) domain. In order to reduce the complexity and to improve the flexibility of a SDMA/TDMA scheduler, the scheduling process can be subdivided into two parts, namely the spatial grouping and the group scheduling. First, the process of grouping separates the subscribers into spatial groups. Second, the group scheduling allocates resources of the time domain to the spatial groups. This paper focuses on the first step of the hierarchical SDMA/TDMA scheduling process, i.e., the spatial grouping. It outlines different grouping strategies and it analyses their complexity. Finally, the paper evaluates their grouping performance. With respect to complexity and performance, a grouping strategy is recommended for wireless networks capable of SDMA.
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Bibtex
@INPROCEEDINGS{hoyJkePabMsg_icc07,
  AUTHOR          = {Hoymann, C. and Ellenbeck, J. and Pabst, R. and Schinnenburg, M.},
  TITLE           = {Evaluation of Grouping Strategies for an Hierarchical SDMA/TDMA
                    Scheduling Process},
  YEAR            = {2007},
  MONTH           = {Jun},
  PAGES           = {6},
  ADDRESS         = {Glasgow, UK},
  BOOKTITLE       = {Proceedings of the IEEE International Conference on Communications 2007},
  AFFILIATION     = {Department of Communication Networks (ComNets), Faculty 6, RWTH Aachen University},
  ISBN            = {1-4244-0353-7},
  ANNOTE          = {SDMA, scheduling, wimax},
  URL             = {http://www.comnets.rwth-aachen.de} 
}
Signature in CN-Library = {Qi 022 (2007)}
Letzte Änderung:  8.05.2008 12.16