US 12,341,602 B2
Optical line terminal, optical network unit, and optical communications system
Huafeng Lin, Dongguan (CN); Wei Ling, Dongguan (CN); and Xiaofei Zeng, Dongguan (CN)
Assigned to HUAWEI TECHNOLOGIES CO., LTD., Shenzhen (CN)
Filed by Huawei Technologies Co., Ltd., Shenzhen (CN)
Filed on Jul. 22, 2022, as Appl. No. 17/814,324.
Application 17/814,324 is a continuation of application No. PCT/CN2020/128729, filed on Nov. 13, 2020.
Claims priority of application No. 202010117620.9 (CN), filed on Feb. 25, 2020.
Prior Publication US 2022/0360356 A1, Nov. 10, 2022
Int. Cl. H04B 10/00 (2013.01); H04B 10/294 (2013.01); H04B 10/572 (2013.01); H04J 14/02 (2006.01); H04Q 11/00 (2006.01); H04J 14/00 (2006.01)
CPC H04J 14/0246 (2013.01) [H04B 10/294 (2013.01); H04B 10/572 (2013.01); H04J 14/025 (2013.01); H04Q 11/0067 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A first optical line terminal (OLT), comprising:
an electrical multiplexer, configured to receive downlink data frames of M1 paths, and multiplex the downlink data frames of the M1 paths into one high-speed downlink bit stream, wherein M1 is a positive integer;
a first optical modulator, configured to convert the one high-speed downlink bit stream into a physical electrical signal, and modulate the physical electrical signal into a downlink optical signal having a wavelength of λo;
N2 uplink optical receivers, wherein N2 is a positive integer greater than 1, and wherein different optical receivers in the N2 uplink optical receivers are configured to receive uplink optical signals of different wavelengths; and
N3 uplink optical receivers, wherein N3 is a positive integer, and wherein a channel in which the other N3 uplink optical receivers are located is a management and backup channel.