US 9,813,184 B2
Method and communication control device for establishing a communication channel in a communication network
Mirko Lawin, Meiningen (DE); and Stephan Pachnicke, Dortmund (DE)
Assigned to Adva Optical Networking SE, Meiningen (DE)
Filed by ADVA Optical Networking SE, Meiningen (DE)
Filed on Sep. 17, 2015, as Appl. No. 14/857,019.
Claims priority of application No. 14003258 (EP), filed on Sep. 19, 2014.
Prior Publication US 2016/0087749 A1, Mar. 24, 2016
Int. Cl. H04J 14/02 (2006.01); H04Q 11/00 (2006.01)
CPC H04J 14/0258 (2013.01) [H04J 14/025 (2013.01); H04J 14/0246 (2013.01); H04J 14/0257 (2013.01); H04J 14/0276 (2013.01); H04J 14/0282 (2013.01); H04Q 11/0066 (2013.01); H04J 14/0267 (2013.01); H04Q 2011/0016 (2013.01); H04Q 2011/0077 (2013.01); H04Q 2011/0086 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A method for establishing a communication channel, preferably an embedded control channel, between a central network node and at least one network unit to be integrated in a communication network comprising the central network node and an arbitrary but limited number of network units, the central network node being adapted to create and output a wavelength-division multiplex (WDM) downstream signal comprising downstream channel signals to be transmitted to the network units and to receive a WDM upstream signal comprising upstream channel signals created by the network units, the method comprising the steps of:
(a) in a setup mode, creating a setup channel signal at the at least one network unit, the frequency spectrum of which comprises, as a modulation component, a setup label which is selected from a predetermined set of at least two setup labels, a predetermined setup address label being associated with each setup label, and transmitting, from the at least one network unit, the setup channel signal in the direction of the central network node;
(b) detecting, at the central network node, the presence of a new upstream channel signal created by the at least one network unit within the WDM upstream signal by detecting a respective new setup label and determining the setup address label associated with the setup label detected, and creating, at the central network node, a downstream channel signal receivable by the at least one network unit by modulating the WDM downstream signal according to a downstream modulation signal comprising, as information to be transmitted to the at least one network unit, a setup information and an address information comprising the setup address label associated with the setup label detected, wherein the setup information comprises a unique operating address label that has been assigned to the at least one network unit, wherein the operating address label is selected from a set of operating address labels different from the setup address labels; and
(c) at the at least one network unit, receiving the respective downstream channel signal and extracting and further processing the setup information in case the setup address label included within the respective downstream channel signal equals the setup address label associated with the setup label of the setup channel signal that has been sent by the at least one network unit.