US 2014/0112660 A1 · SYSTEMS AND METHODS FOR CHANNEL ADDITIONS OVER MULTIPLE CASCADED OPTICAL NODES

Abstract

A method, an optical node, and an optical network include a power controller configured to bring channels in-service in parallel over multiple cascaded optical nodes quickly, efficiently, and in a non-service affecting manner. The method, node, and network utilize multiple states of a control loop that maintains a stable response in downstream optical nodes as channels are added in parallel. Further, the power controller is configured to operate independently alleviating dependencies on other power controllers and removing the need for coordination between power controllers. The method, node, and network provide efficient turn up of dense wave division multiplexing (DWDM) services which is critical to optical layer functionality including optical layer restoration.

Claims20

Dependent claims

A method, comprising:

introducing a channel through a first node and a second node, wherein the channel is introduced in parallel over the first node and the second node;
measuring power of the channel entering the first node and the channel entering the second node;
determining a first measured error of the channel based on a target power and the measured power at the first node and a second measured error of the channel based on a target power and the measured power at the second node;
performing a control loop using the first measured error at the first node and using the second measured error at the second node, wherein the first node and the second node perform the control loop independently of one another;
modifying parameters of the control loop at each of the first node and the second node with a plurality of states to maintain a stable response;
and
adjusting power of the channel based on the modified control loop at each of the first node and the second node.

4 more elements

An optical node, comprising:

at least one degree comprising components configured to selectively alter power of a channel being added to the at least one degree;
an optical power monitor measuring an output power of the channel out of the at least one degree;
and
a power controller communicatively coupled to the at least one degree and the optical power monitor, wherein the power controller is configured to:
measure power of the channel being added to the at least one degree, wherein the channel is being added in parallel over at least one additional node;
determine a measured error of the channel based on a target power and the measured power;
perform a control loop using the measured error, wherein the at least one additional node performs the control loop concurrently and independently of the optical node;
modify parameters of the control loop with a plurality of states to maintain a stable response;
and
adjust power of the channel based on the modified control loop using the components to selectively alter the power.

7 more elements

Dependencies are inferred from the claim text.

Systems and methods for channel additions over multiple cascaded optical nodes

Life of this patent

Systems and methods for channel additions over multiple cascaded optical nodes

Life of this patent

Abstract

Claims20