US 12,127,250 B2
Improving operation of cellular communication networks on unlicensed frequency bands
Esa Tapani Tiirola, Oulu (FI); Kari Juhani Hooli, Oulu (FI); and Timo Erkki Lunttila, Espoo (FI)
Assigned to Nokia Technologies Oy, Espoo (FI)
Appl. No. 17/286,994
Filed by Nokia Technologies Oy, Espoo (FI)
PCT Filed Nov. 2, 2018, PCT No. PCT/EP2018/080024
§ 371(c)(1), (2) Date Apr. 20, 2021,
PCT Pub. No. WO2020/088775, PCT Pub. Date May 7, 2020.
Prior Publication US 2021/0392684 A1, Dec. 16, 2021
Int. Cl. H04W 74/0816 (2024.01); H04W 72/0453 (2023.01); H04W 72/1268 (2023.01); H04W 74/00 (2009.01)
CPC H04W 74/0816 (2013.01) [H04W 72/0453 (2013.01); H04W 72/1268 (2013.01); H04W 74/006 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method for a cellular wireless device, comprising:
obtaining, from a cellular base station, a first opportunity for an uplink data transmission on an unlicensed frequency band, wherein the first opportunity is within a first period reserved for first transmission opportunities on a frequency channel;
upon detecting that the frequency channel is occupied at a beginning of the first opportunity, determining a second opportunistic resource for the uplink data transmission or a downlink transmission using dynamic link direction change within a Channel Occupancy Time (COT); and
receiving or transmitting using the second opportunistic resource, wherein a starting time of the second opportunistic resource is aligned with a Physical Downlink Control Channel (PDCCH) monitoring occasion of the cellular wireless device.