US 11,943,772 B2
Method and apparatuses for performing unscheduled uplink transmissions on an unlicensed band
Evanny Obregon, Solna (SE); Jung-Fu Cheng, Fremont, CA (US); Amitav Mukherjee, Fremont, CA (US); Reem Karaki, Aachen (DE); and Du Ho Kang, Upplands Väsby (SE)
Assigned to Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
Appl. No. 16/088,484
Filed by TELEFONAKTIEBOLAGET LM ERICSSON (PUBL), Stockholm (SE)
PCT Filed Apr. 21, 2017, PCT No. PCT/SE2017/050395
§ 371(c)(1), (2) Date Sep. 26, 2018,
PCT Pub. No. WO2017/184071, PCT Pub. Date Oct. 26, 2017.
Claims priority of provisional application 62/326,292, filed on Apr. 22, 2016.
Prior Publication US 2019/0110310 A1, Apr. 11, 2019
Int. Cl. H04W 16/14 (2009.01); H04W 72/21 (2023.01); H04W 72/541 (2023.01); H04W 74/02 (2009.01); H04W 74/08 (2009.01); H04L 1/1812 (2023.01); H04W 72/23 (2023.01); H04W 88/02 (2009.01)
CPC H04W 72/21 (2023.01) [H04W 72/541 (2023.01); H04W 74/02 (2013.01); H04L 1/1812 (2013.01); H04W 72/23 (2023.01); H04W 88/02 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method, for a user equipment, UE, for performing an unscheduled uplink transmission in an unlicensed portion of a radio spectrum, the method comprising:
performing, by the UE, a listen before talk, LBT, operation in the unlicensed portion of the radio spectrum, wherein the LBT operation comprises sensing the unlicensed portion of the radio spectrum for a pre-determined minimum amount of time for traffic; and, if no traffic was sensed;
performing the unscheduled uplink transmission, by the UE, of data in an unscheduled mode of operation for at least one transmission burst, wherein performing the unscheduled uplink transmission, by the UE, of data in an unscheduled mode of operation for at least one transmission burst is repeated until an earliest opportunity to transmit a scheduling request, SR, occurs, and wherein the transmission of the SR can occur on one of a licensed carrier or an unlicensed carrier.