Dynamic sub-carrier assignment in OFDM systems
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United States of America Patent
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Apr 13, 2004
Grant Date -
N/A
app pub date -
Sep 29, 2000
filing date -
Sep 29, 2000
priority date (Note) -
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Abstract
A method and apparatus are provided for selecting and signaling the identity of sub-carriers to be used for transmission of data in a radio communication system, and for using other sub-carriers. A remote unit determines which sub-carriers are acceptable for use in data transmission by comparing the signal to interference ratio of each sub-carrier with a threshold. A base station transmits data over the acceptable sub-carriers at the optimum Link Mode or Link Modes. The base station may use some of the unacceptable sub-carriers for transmission of low sensitivity data at the optimum Link Mode, and may use some of the unacceptable sub-carriers for transmission of data at a lower Link Mode. The transmission power any unused unacceptable sub-carriers can be diverted to other sub-carriers.
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