Tropic Networks Inc.

Alcatel-lucent Canada Inc.

John Frederick Groves

Ping Wai Wan

Derrick Remedios

Colin Geoffrey Kelly

Eddie Kai Ho Ng

Arthur Emery Castonguay

A method and system for fault isolation within a network element in an optical network is described. A single fault in the system can give rise to multiple alarms detected at multiple points. Finding the root cause alarm corresponding to the fault that has triggered these alarms is important for fault isolation and is the focus of attention for this invention. The network element is modeled by a directed acyclic graph that captures the interactions among various components in the network element. Using a graph-based technique the invention analyzes the various topological faults raised and their locations for identifying root cause alarms and masking all correlated alarms.

Method and system for fault isolation within a network element in an optical network

A method and system for multi-level power management in an optical network is provided. They include three levels of power management. The first level of power management dynamically changes equipment settings in each module of equipment so that required module setpoint values in each module are achieved. The second level of power management determines module setpoint values for each module of equipment within each node in the optical link so that required node setpoint values are achieved. The third level of power management determines node setpoint values at each node in the optical link so that the optical link meets predetermined power specifications. If any of the three levels cannot achieve the required setpoint values, an error signal is generated by that level of power management and sent to the level of power management above it, thus initiating a higher level of power management. As a result, a dynamic and automatic adjustment to changing operating conditions and configurations in the network is provided, which allows to maintain relatively stable network powers. Each level of power management is implemented such that sections of the network can operate independent of each other, thus increasing the survivability of the network.

System and method for power management in an optical network

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Ottawa, Canada

John Frederick Groves