Optical: systems and elements – Deflection using a moving element – Using a periodically moving element
Patent
1997-06-02
1999-11-09
Negash, Kinfe-Michael
Optical: systems and elements
Deflection using a moving element
Using a periodically moving element
359110, 359125, 370222, 370405, H04B 1020, H04J 1400
Patent
active
059825170
ABSTRACT:
A service restoration system and method for a mixed SONET/WDM optical fiber telecommunication networks comprising a plurality of self healing SONET rings and at least one WDM link which is shared by these SONET rings, provides protection on the optical layer of at least one WDM link in case of fiber or cable cut. The WDM link protection is provided by rerouting the WDM link traffic through a dedicated protection ring which is selected from the plurality of self healing SONET rings, via color blind optical fiber-to-fiber switches. The WDM working equipment protection is provided by rerouting the SONET traffic via additional optical switches and wavelength converters through WDM link. Wavelength converter aligns the wavelength of the optical signal to match the wavelength of failed WDM channel, to localize and heal the failure of the WDM working equipment without reporting to the adjacent nodes.
REFERENCES:
patent: 5448389 (1995-09-01), Peacock
patent: 5576875 (1996-11-01), Chawki et al.
patent: 5757768 (1998-05-01), Goto et al.
patent: 5760935 (1998-06-01), Sabry et al.
Fishman Bella
Fishman Consulting
Negash Kinfe-Michael
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