US 12,463,729 B2
System and method for wavelength control in frequency referenced passive optical network
Jinlong Wei, Shenzhen (CN); Zhicheng Ye, Dongguan (CN); and Zhixin Liu, London (GB)
Assigned to Huawei Technologies Co., Ltd., Shenzhen (CN)
Filed by HUAWEI TECHNOLOGIES CO., LTD., Shenzhen (CN)
Filed on Sep. 1, 2023, as Appl. No. 18/460,296.
Application 18/460,296 is a continuation of application No. PCT/EP2021/055988, filed on Mar. 10, 2021.
Prior Publication US 2023/0412278 A1, Dec. 21, 2023
Int. Cl. H04B 10/572 (2013.01); H04B 10/27 (2013.01); H04B 10/50 (2013.01); H04B 10/516 (2013.01)
CPC H04B 10/572 (2013.01) [H04B 10/27 (2013.01); H04B 10/503 (2013.01); H04B 10/516 (2013.01)] 24 Claims
OG exemplary drawing
 
1. A system for wavelength control in a passive optical network (PON) with a point to multi-point (P2MP) topology comprising a central node and a plurality of end nodes, the system comprising:
a central node transceiver configured to broadcast to the plurality of end nodes a reference signal carrying a management information, wherein the management information indicates a target frequency assigned to each end node of the plurality of end nodes; and
an end node transceiver in each end node of the plurality of end nodes, configured to:
determine, for the particular end node, the particular target frequency by extracting the management information from the reference signal,
generate, for the particular end node, a particular beating frequency by beating the reference signal with an uplink laser signal, and
control, for the particular end node, a wavelength of the uplink laser signal to lock to the particular target frequency based on the beating frequency.