US 12,273,185 B2
Optical transport network protection architecture, nodes and method
Annamaria Fulignoli, Genoa (IT); Stefano Orsi, Genoa (IT); Riccardo Ceccatelli, Genoa (IT); and Stefano Parodi, Genoa (IT)
Assigned to Telefonaktiebolaget LM Ericsson (Publ), Stockholm (SE)
Appl. No. 18/005,205
Filed by Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
PCT Filed Jul. 17, 2020, PCT No. PCT/EP2020/070393
§ 371(c)(1), (2) Date Jan. 12, 2023,
PCT Pub. No. WO2022/012763, PCT Pub. Date Jan. 20, 2022.
Prior Publication US 2023/0224067 A1, Jul. 13, 2023
Int. Cl. H04J 14/02 (2006.01); H04B 10/40 (2013.01); H04B 10/50 (2013.01); H04B 10/60 (2013.01)
CPC H04J 14/0294 (2013.01) [H04B 10/40 (2013.01); H04B 10/50 (2013.01); H04B 10/60 (2013.01); H04J 2203/006 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A communications network remote node comprising:
a downstream optical circuit configured to receive downstream, DS, optical signals at downstream wavelengths from an active main node and from a standby main node, the downstream optical circuit switchable between a working mode and a protection mode, in the working mode the downstream optical circuit is configured to demultiplex downstream optical signals carrying encapsulated client signals received from the active main node and in the protection mode the downstream optical circuit is configured to demultiplex downstream optical signals carrying encapsulated client signals received from the standby main node;
a plurality of optical receivers configured to receive the demultiplexed downstream optical signals and output encapsulated downstream client signals;
a plurality of optical transmitters configured to receive encapsulated upstream client signals and to transmit upstream, US, optical signals at upstream wavelengths carrying the encapsulated upstream client signals;
an upstream optical circuit configured to multiplex the upstream optical signals carrying the encapsulated upstream client signals and to send the upstream optical signals to both the active main node and the standby main node; and
processing circuitry configured to:
extract downstream client signals and alignment data from encapsulated downstream client signals; and
form encapsulated upstream client signals by encapsulating upstream client signals and alignment data.