Dynamic fractional frequency reuse in OFDMA networks
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United States of America Patent
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May 8, 2012
Grant Date -
May 6, 2010
app pub date -
Oct 31, 2008
filing date -
Oct 31, 2008
priority date (Note) -
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Abstract
A method allocates resources in an orthogonal frequency-division multiple access (OFDMA) network including a set of base stations (BSs), and a set of mobile stations (MSs) for each BS. Each cell includes a center and edge zone. A node weighted constraint graph is constructed for the network. Maximal independent sets in the graph are searched as sub-channels are allocated to the MSs in edge zones. Remaining bandwidth is allocated to the MSs in the center zones. Power is assigned to the sub-channels so that inter-cell interference is minimized and traffic load is maximized.
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