Ciena

About: Ciena is a company organization based out in Hanover, Maryland, United States. It is known for research contribution in the topics: Signal & Node (networking). The organization has 1259 authors who have published 1557 publications receiving 25989 citations.

Network resource optimization based on time-varying traffic in optical networks

Abstract: Systems and methods of network resource optimization based on time-varying traffic in an optical network with a filterless architecture include determining traffic variations based on the time-varying traffic in the optical network; and adjusting one or more of transceivers and wavelengths between nodes in the optical network based on the traffic variations and using the filterless architecture. The adjusting minimizes the number of the transceivers and the wavelengths based on the traffic variations and the time-varying traffic. The optical network can geographically span multiple time zones, contributing to the time-varying traffic.

Blank module with conduit retainer

Abstract: An optical module blank includes a base portion, and a pair of retainers disposed on the base portion. The pair of retainers retains conduits at a predetermined location of the base portion to enable the conduits to be connected to an optical component, such as a laser module, if the optical module blank is replaced with an optical module. A line module of an optical communications equipment may be populated with one or more optical module blanks. However, if the entire line module is to be totally populated with optical module blanks, then a line module blank may be used. Such a device includes a tray portion, and a retainer portion disposed on a front section of the tray portion. The retainer portion has abutting base plates with four pairs of retainers disposed on one base plate and another four pairs of retainers disposed on the other base plate. The pairs of retainers retain conduits at predetermined locations of the base plates to enable the conduits to be connected to optical components if the line module blank is replaced with a line module.

Tracking physical route changes in optical switching network

Abstract: A method and system for tracking physical route changes in an optical switching network. One embodiment comprises a method for detecting changes in physical routes of connections within an optical switching network. The method includes receiving an event message from a node of the optical switching network where the event message relates to an event at the node, applying a filtering function to the event message to determine whether the event message may be ignored, ignoring the event message if the event message does not pass the filtering function, and processing the event message if the event message passes the filtering function.

G.8032 prioritized ring switching systems and methods

Abstract: A prioritized G.8032 ring switching systems and methods implemented in a node include receiving a defined priority level for each of a plurality of virtual rings at the node, wherein the priority level is one of N levels of priority, N being an integer; and, responsive to a link failure that affects the plurality of virtual rings, performing G.8032 traffic restoration in order based on each of the N levels of priority, wherein each set of the plurality of virtual rings at a same defined priority level are processed concurrently to minimize hardware access. The plurality of virtual rings can be processed concurrently through flushing their Forwarding Databases at a same time for each of the set on a per virtual ring basis. The receiving is via a Ring Automated Protection Switching (R-APS) Protocol Data Unit (PDU) for each virtual ring with the defined priority level included therein.

High-degree reconfigurable optical add-drop multiplexing systems using bi-directional wavelength selective switches

Abstract: The present disclosure provides high-degree reconfigurable optical add-drop multiplexing (ROADM) systems using bi-directional wavelength selective switches (WSSs) and optical circulators. A single WSS is utilized on each degree of a node in a bi-directional manner, i.e. both ingress and egress share the same WSS. Advantageously, the present invention eliminates conventional splitters/combiners thereby capping intra-node insertion loss to a certain value regardless of the number of degrees. More importantly, the present invention reduces noise penalty associated with high-degree nodes while minimizing cost.