Redundancy for dual optical ring concentrator

Details Redundancy for dual optical ring concentrator Redundancy for dual optical ring concentrator

2008-01-08

2008-01-08

Vu, Huy D. (Department: 2616)

Multiplex communications

Fault recovery

Bypass an inoperative station

C370S222000, C370S223000

Reexamination Certificate

active

07317681

ABSTRACT:
A novel and useful mechanism for optical ring networks providing concentrator redundancy in the event of a failure of a concentrator. The nodes in a network are connected to dual concentrators to form bi-directional dual counter-rotating optical rings. The failure of one of the concentrators is detected and the internal connections of the surviving concentrator are reconfigured to form a single ring that provides an alternate communication path thus preventing the collapse of the ring. Reliability of optical rings is improved by enabling the ring to continue to function in the event of a concentrator failure.

REFERENCES:
patent: 5663950 (1997-09-01), Lee et al.
“Dynamic Packet Transport Technology and Performance”,Cisco Systems White Paper, pp. 1-13, (2000).
“Enhanced Intelligent Protection Switching (E-IPS)”,Cisco Systems White Paper, pp. 1-7, (2000).
“Spatial Reuse Protocol Technology”,Cisco Systems White Paper, pp. 1-37, (2000).
Tsiang, D., et al., “The Cisco SRP MAC Layer Protocol”,RFC 2892, pp. 1-43, (Aug. 2000).

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