US 12,476,726 B2
Technique for performing time synchronization
Ahmet Burak Ozyurt, Edinburgh (GB); Yekta Turk, Ankara (TR); and Athanasios Stavridis, Malmö (SE)
Assigned to Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
Appl. No. 18/039,448
Filed by Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
PCT Filed Mar. 9, 2021, PCT No. PCT/EP2021/055840
§ 371(c)(1), (2) Date May 30, 2023,
PCT Pub. No. WO2022/117234, PCT Pub. Date Jun. 9, 2022.
Prior Publication US 2024/0007213 A1, Jan. 4, 2024
Int. Cl. H04J 3/06 (2006.01); H04B 10/112 (2013.01)
CPC H04J 3/0661 (2013.01) [H04B 10/112 (2013.01); H04J 3/0644 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for performing time synchronization between a master device and a slave device, the method being performed by the master device and comprising:
transmitting, using optical wireless signals, a timestamp representative of a clock time of the master device to the slave device, wherein the timestamp is encoded using a color-based optical coding scheme and is to be used by the slave device to set a clock time of the slave device in accordance with the timestamp to thereby synchronize the clock time of the slave device with the clock time of the master device;
wherein the color-based optical coding scheme is implemented using a predefined color codebook according to which different timestamps are encoded by different shades of color.