Method and system for transporting ancillary network data

Details Method and system for transporting ancillary network data Method and system for transporting ancillary network data

1996-06-28

2000-08-22

Pascal, Leslie

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359110, 359161, 359173, H04J 1402, H04B 1008

Patent

active

061081132

ABSTRACT:
A method and system for transporting ancillary network data is provided. A sub-carrier modulation signal containing ancillary network data is superimposed on a high bit-rate data signal prior to transport over an optical link. The monitoring subcarrier signal is significantly lower in both frequency and amplitude than the main data signal so as to not impact reliable reception of the main data signal. A low-pass filter filters the sub-carrier modulation signal from the data signal. By demodulating the sub-carrier signal, the ancillary network data is recovered. The ancillary network data includes any combination of data type information related to different network elements. The recovered ancillary network data is useful for any network management purpose. Especially important applications include restoration, wavelength re-use and routing, and any other general network management operation.

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