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A Framework for Development and Evaluation of a Dynamic Subchannel Allocation Scheme in an OFDMA System

Authors
Roy, Banani and Einhaus, Michael and Roy, Chanchal Kumar
Department of Communication Networks (ComNets), Faculty 6, RWTH Aachen University Kontakt: Michael Einhaus

In The Journal of Supercomputing, p. 30, http://www.springerlink.com/content/t383m3640405425l/,Springer Netherlands, 2008.
Publication Date: Mar, 2008
On page(s):30
ISBN:

Abstract
This paper presents a framework for allocating radio resources to the Ac- cess Points (APs) introducing an Access Point Controller (APC). Radio resources can be either time slots or subchannels. The APC assigns subchannels to the APs using a dynamic subchannel allocation scheme. The developed framework evaluates the dynamic subchannel allocation scheme for a downlink multicellular Orthogonal Fre- quency Division Multiple Access (OFDMA) system. In the considered system, each AP and the associated Mobile Terminals (MTs) are not operating on a frequency channel with fixed bandwidth, rather the channel bandwidth for each AP is dynam- ically adapted according to the traffic load. The subchannels assignment procedure is based on quality estimations due to the interference measurements and the current traffic load. The traffic load estimation is realized with the measurement of the utiliza tion of the assigned radio resources. The reuse partitioning for the radio resources is done by estimating mutual Signal to Interference Ratio (SIR) of the APs. The devel- oped dynamic subchannel allocation ensures Quality of Service (QoS), better traffic adaptability, and higher spectrum efficiency with less computational complexity.
Author Keywords
Access Point Controller, OFDMA System, Frequency Reuse, Hierarchical Radio Resource Management, Decision Function, Dynamic Subchannel Allocation
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Bibtex
@ARTICLE{RoyEinRoy2008,
  AUTHOR          = {Roy, B. and Einhaus, M. and Roy, C.},
  TITLE           = {A Framework for Development and Evaluation of a Dynamic Subchannel
                    Allocation Scheme in an OFDMA System},
  JOURNAL         = {The Journal of Supercomputing},
  YEAR            = {2008},
  MONTH           = {Mar},
  PAGES           = {30},
  PUBLISHER       = {Springer Netherlands},
  ADDRESS         = {http://www.springerlink.com/content/t383m3640405425l/},
  HOWPUBLISHED    = {Online publication},
  AFFILIATION     = {Department of Communication Networks (ComNets), Faculty 6, RWTH Aachen University},
  ISSN            = {1573-0484},
  KEYWORDS        = {Access Point Controller, OFDMA System, Frequency Reuse, Hierarchical
                    Radio Resource Management, Decision Function, Dynamic Subchannel
                    Allocation

},
  URL             = {http://www.comnets.rwth-aachen.de} 
}
Letzte Änderung:  8.05.2008 12.16