US 11,743,942 B2
Listen before talk procedure and uplink switching
Alireza Babaei, Fairfax, VA (US); Esmael Hejazi Dinan, McLean, VA (US); Hyoungsuk Jeon, Centreville, VA (US); Hua Zhou, Vienna, VA (US); Ali Cagatay Cirik, Chantilly, VA (US); and Kyungmin Park, Vienna, VA (US)
Assigned to Ofinno, LLC, Reston, VA (US)
Filed by Ofinno, LLC, Reston, VA (US)
Filed on Jan. 27, 2022, as Appl. No. 17/585,647.
Application 17/585,647 is a continuation of application No. 16/536,689, filed on Aug. 9, 2019, granted, now 11,272,540.
Claims priority of provisional application 62/716,806, filed on Aug. 9, 2018.
Prior Publication US 2022/0150964 A1, May 12, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H04W 74/08 (2009.01); H04W 72/23 (2023.01)
CPC H04W 74/0808 (2013.01) [H04W 72/23 (2023.01)] 20 Claims
OG exemplary drawing
 
1. A method comprising:
receiving, by a wireless device, radio resource control (RRC) messages comprising configuration parameters of a plurality of carriers of an unlicensed cell, wherein the plurality of carriers comprise a downlink carrier and two or more uplink carriers comprising a normal uplink carrier and a supplementary uplink carrier;
determining a first contention window for a first listen before talk (LBT) procedure for a first channel of the normal uplink carrier;
based on switching from the normal uplink carrier to the supplementary uplink carrier, determining a second contention window to be a minimum contention window, of a plurality of contention windows, for a second LBT procedure of a second channel of the supplementary uplink carrier; and
transmitting, via the supplementary uplink carrier, a transport block based on the second LBT procedure using the second contention window.