LTE/LTE—A uplink carrier aggregation using unlicensed spectrum
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United States of America Patent
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Jan 30, 2018
Grant Date -
Dec 11, 2014
app pub date -
Dec 4, 2013
filing date -
Jun 11, 2013
priority date (Note) -
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Abstract
Methods, systems, and apparatuses are described for wireless communications. In one method, an uplink grant may be received over a licensed spectrum. A clear channel assessment (CCA) may be performed in response to the uplink grant to determine availability of an unlicensed spectrum. The CCA may be performed prior to a transmission associated with the uplink grant. In another method, scheduling information may be received over a licensed spectrum. An uplink grant may be transmitted over the licensed spectrum. The uplink grant may be based at least in part on the scheduling information. The uplink grant may be configured to trigger a CCA to determine availability of an unlicensed spectrum prior to a transmission associated with the uplink grant.
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