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Dynamic resource allocation for interference management in orthogonal frequency division multiple access cellular communications

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2 Author(s)
Wang, M.M. ; Qualcomm Res. Center, San Diego, CA, USA ; Ji, T.

Next generation wireless communications rely on large bandwidths and orthogonal frequency division multiple access (OFDMA) techniques to achieve high data rates. In an OFDMA-based cellular network, interference management is key to system performance characteristics, such as capacity, coverage and stability. Conventional cellular systems typically employ frequency reuse, such as 1/3, or 1/7 frequency reuse, to reduce inter-cell interference, resulting in low bandwidth efficiency. This study introduces a frequency resource and interference management scheme for use in an OFDMA cellular communication system, referred to as dynamic frequency resource allocation, in which the network divides frequency band into multiple partitions with various inter-sector interference blocking capabilities. In addition, an interference identification scheme that allows the network to acquire a terminal's interference properties is also proposed. Therefore the terminals under different inter-sector interference can be dynamically assigned with the most efficient frequency resources depending on the interference sources, enabling the network to optimise both bandwidth usage and cell edge performance with increased flexibility and accuracy.

Published in:

Communications, IET  (Volume:4 ,  Issue: 6 )

Date of Publication:

April 16 2010

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