Patent ID: 9048971
Filing Date: 2015-06-02
Classification: H04J

Abstract:
1. A method for an optical communication network including a first and a second network element, the first network element comprising a first service transmitter and the second network element comprising a second service transmitter, the method comprising: transmitting data from the first network element by means of a first optical data signal on a first data carrier; transmitting first service information from the first service transmitter by means of a first optical service signal on a first service carrier; transmitting data from the second network element by means of a second optical data signal on a second data carrier; transmitting second service information from the second service transmitter by means of a second optical service signal on a second service carrier; characterized in that: the offset between the frequency of the first data carrier and the frequency of the first service carrier is substantially equal to the offset between the frequency of the second data carrier and the frequency of the second service carrier.