Unlicensed frequency band with licensed frequency band timing
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United States of America Patent
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Oct 9, 2018
Grant Date -
Jan 25, 2018
app pub date -
Sep 26, 2017
filing date -
May 22, 2014
priority date (Note) -
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Abstract
The timing used by communication equipment in a licensed frequency band by is used by the communication equipment for communication in an unlicensed frequency band. Time divisions, such as frames, subframes, timeslots, and symbol times, defined for use in the licensed frequency band are used by the communication equipment to communicate in the unlicensed frequency band. Before a transmitting device transmits within the unlicensed frequency band, the unlicensed frequency band is monitored for radio frequency energy to determine if the spectrum is currently being used. If no energy is detected, or the level is below a threshold, it is determined that the unlicensed band can be used by the transmitter.
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