Fujitsu Corporation

Raghu Rajan

Manlio Marquez

Vijay Khopade

Danny Dharamraj

Surendra Gupta

Catherine Yuan

Vikas Mittal

Milind Kulkarni

Yanbing Li

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.

Method and system for protection switching

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.

Determining an active/standby state for an interface unit includes determining an entity active/standby state for each entity of one or more entities of the interface unit. If each entity active/standby state is standby, then an aggregated active/standby state of the interface unit is established to be standby.

Determining an aggreagated active/standby state for an interface unit form entity active/standby states

A protection method and system for equipment in a network element receives a protection request for an equipment item. A priority of the request and a priority of the equipment item is evaluated relative to all other outstanding protection requests for equipment items in a protection group with the equipment item. A highest priority protection request for a highest priority equipment item is performed.

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Murphy, TX, United States of America

Raghu Rajan