US 12,273,142 B2
Power saving for multi-wavelength passive optical network (PON)
Marek Hajduczenia, Castle Rock, CO (US)
Assigned to Charter Communications Operating, LLC, St. Louis, MO (US)
Filed by Charter Communications Operating, LLC, St. Louis, MO (US)
Filed on Aug. 5, 2021, as Appl. No. 17/395,101.
Prior Publication US 2023/0040541 A1, Feb. 9, 2023
Int. Cl. H04B 10/077 (2013.01); H04J 14/02 (2006.01)
CPC H04B 10/077 (2013.01) [H04J 14/0245 (2013.01); H04J 14/0249 (2013.01)] 30 Claims
OG exemplary drawing
 
1. A method of reducing power consumption in a multi-channel passive optical network (PON), comprising:
detecting a currently inactive channel based on a result of monitoring individual channels in the multi-channel PON;
determining whether the detected inactive channel has remained inactive for an extended period of time;
deactivating the detected inactive channel by deenergizing a transmitter associated with the detected inactive channel in response to determining that the detected inactive channel has remained inactive for an extended period of time;
periodically probing the deactivated channel to determine whether an optical signal is reliably present on the deactivated channel by:
determining a ratio between a number of probes within a time period that detected a presence of the signal and a total number of probes within that time period; and
determining whether the determined ratio exceeds a threshold value; and
reactivating the channel by reenergizing the transmitter associated with the inactive channel in response to determining that the optical signal has been reliably present on the deactivated channel.