METHOD AND APPARATUS FOR ENHANCING UL THROUGHPUT IN OFDMA SYSTEMS
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United States of America Patent
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Issued Date -
Aug 25, 2011
app pub date -
Feb 21, 2011
filing date -
Feb 19, 2010
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Abandoned
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Abstract
A method is provided for enhancing uplink frame throughput in an OFDMA system. The method includes an uplink map fill phase for at least one mobile station including allocation of grants in said uplink frame for the at least one mobile station. After the fill phase, the method includes at least one iteration of: a subchannel expansion in which at least one slot is allocated for transmission, for a current grant, to a mobile station in the layer of the uplink frame, the expansion being performed for at least one of the at least two mobile stations, and the expansion delivering an expanded uplink map; and a slot compression step, from the expanded uplink map, in which an improvement of a modulation and coding scheme is realized by changing the modulation and coding scheme of a grant dependent on an current pair's optimizing mutual capacity, delivering an improved uplink map.
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