Surendra K Gupta

US Patent:

8224180, Jul 17, 2012

Filed:

Jan 13, 2010

Appl. No.:

12/686611

Inventors:

Surendra Gupta - Richardson TX, US
Vijay Khopade - Richardson TX, US
Raghu Rajan - Murphy TX, US
Manlio Marquez - Plano TX, US

Assignee:

Fujitsu Limited - Kawasaki

International Classification:

H04B 10/00

US Classification:

398 5, 398 12, 398 19

Abstract:

A method is provided for protection switching in an optical network. The method may include: (i) establishing a baseline power level for a channel and a threshold value for the channel approximately equal to a predetermined threshold value; (ii) receiving a signal associated with the channel via each of a first path of the optical network and a second path of the optical network; (iii) monitoring a power intensity of the signal received via the first path; (iv) determining an average power intensity of the signal received via the first path based on the monitored power intensity; (v) modifying at least one of the baseline power level and the threshold value in response to a determination that the average power intensity exceeds the baseline power level; and (vi) protection switching from the signal received via the first path to the signal received via the second path in response to a determination that the baseline power level exceeds the power intensity of the signal received via the first path by the threshold.

US Patent:

8335428, Dec 18, 2012

Filed:

Jan 13, 2010

Appl. No.:

12/686596

Inventors:

Surendra Gupta - Richardson TX, US
Vijay Khopade - Richardson TX, US
Raghu Rajan - Murphy TX, US
Manlio Marquez - Plano TX, US

Assignee:

Fujitsu Limited - Kawasaki-shi

International Classification:

H04B 10/00

US Classification:

398 5, 398 12, 398 19

Abstract:

A method is provided for protection switching in an optical network. The method may include establishing a baseline power level for a channel. The method may further include receiving a signal associated with the channel via each of a first path of the optical network and a second path of the optical network. The method may also include monitoring a power intensity of the signal received via the first path. The method may additionally include protection switching from the signal received via the first path to the signal received via the second path in response to a determination that the baseline power level exceeds the power intensity of the signal received via the first path by a predetermined threshold.