US 11,889,528 B2
Systems and methods for LTE operation in unlicensed bands
J. Patrick Tooher, Montreal (CA); Janet A. Stern-Berkowitz, Little Neck, NY (US); Pouriya Sadeghi, San Diego, CA (US); Moon-il Lee, Melville, NY (US); and Marian Rudolf, Montreal (CA)
Assigned to InterDigital Patent Holdings, Inc., Wilmington, DE (US)
Filed by InterDigital Patent Holdings, Inc., Wilmington, DE (US)
Filed on Aug. 17, 2022, as Appl. No. 17/890,214.
Application 17/890,214 is a continuation of application No. 15/565,113, granted, now 11,457,433, previously published as PCT/US2016/026442, filed on Apr. 7, 2016.
Claims priority of provisional application 62/144,910, filed on Apr. 8, 2015.
Prior Publication US 2022/0394691 A1, Dec. 8, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H04W 72/23 (2023.01); H04W 74/08 (2009.01); H04W 16/14 (2009.01); H04W 72/12 (2023.01)
CPC H04W 72/23 (2023.01) [H04W 16/14 (2013.01); H04W 74/0808 (2013.01); H04W 72/1215 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A wireless transmit/receive unit (WTRU) comprising:
a transceiver, the transceiver configured at least to receive downlink control information (DCI), the DCI comprising:
an indication of an uplink (UL) grant for an UL transmission; and
an indication of one or more parameters associated with a channel assessment occasion, the channel assessment occasion corresponding to a time period to conduct one or more channel assessments; and
a processor, the processor configured at least to:
determine a start time for the UL transmission based at least on the UL grant;
determine a start time of the channel assessment occasion based at least on the start time for the UL transmission and at least one of the one or more parameters associated with the channel assessment occasion indicated in the DCI, wherein the channel assessment occasion is before the start time for the UL transmission, wherein a length of time between the start time of the channel assessment occasion and the start time for the UL transmission is based on the at least one of the one or more parameters associated with the channel assessment occasion indicated in the DCI;
perform the one or more channel assessments on a channel during the channel assessment occasion;
determine whether the channel is available based on the one or more channel assessments; and
send, via the transceiver, the UL transmission at the start time for the UL transmission via the channel on a condition that the channel is determined to be available.