Restoration systems for an optical telecommunications network

Details Restoration systems for an optical telecommunications network Restoration systems for an optical telecommunications network

1995-12-29

1999-06-22

Pascal, Leslie

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359110, 359128, 370221, H04B 1020, H04J 1402

Patent

active

059147989

ABSTRACT:
An optical telecommunication network has a plurality of optical cross-connect switching nodes linked together by optical cables to form transmission paths for traffic between sending and destination stations. A centralized operation support system (OSS) is coupled to each node for receiving failure alarms and port status messages for failed cables from the switching nodes and terminal sites. The collected data is used to select alternate routes through the network using the spare capacity of the optical cross-connect switches and available wavelengths within the network. Any connection(s) to put into effect an alternate routing plan is broadcast to the affected nodes or terminal sites. A Real-Time Multiple Wavelength Routing (RMWR) algorithm is used by the OSS or by decentralized switching nodes to select, coordinate and route traffic among selected paths to bypass the failed cable such that wavelength collisions or adjacent cross-talk do not degrade the network performance. The OSS is updated when network restoration is performed by a switching node in the path of the failed cable.

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Ayanoglu, "Reduction of Restoration Capacity Requiredments in advanced Optical Networks", Globecom '95, pp. 1018-1022, Nov. 1995.

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