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.

Highly channelized port polling in a telecommunications switch

Abstract: A method of telecommunication network switch port polling enables very highly channelized ports to be polled. A polling engine reads information from at least one of a plurality of poll registers, and each of the plurality of poll registers is associated with a unique identifier. Depending on the information read from the at least one poll register, the polling engine reads a channel number representing the channel to be polled from a location in channel memory. The polling engine determines the location from the unique identifier associated with the at least one poll register from which the information is read. The polling engine polls channel represented by the read channel number.

System for group-based distributed protection switching

Abstract: System for providing distributed group-based protection switching at a network element in a communication network. The communication network includes a plurality of interconnected network elements, and wherein the network element includes first and second card logic coupled to the communication network to transmit and receive network traffic. The system comprises selector logic distributed between the first and second card logic that includes first and second switching engines that have associated activity states that indicate how the network traffic is routed at the network element. The switching engines generate new activity states based on selected fault indicators. A processing system operates to detect fault conditions, generate the selected fault indicators, and receive the new activity states from the switching engines to perform one or more switch reconfigurations at the network element based on the new activity states, and thereby implement the distributed group-based protection switching.

Neural Network Training for OSNR Estimation from Prototype to Product

Abstract: A method for in-service OSNR measurement with a coherent transceiver is presented and experimentally verified. A neural network is employed to identify and remove the nonlinear noise contribution to the estimated OSNR.

Upper layer network device including a physical layer test port

Abstract: The present invention provides an upper layer network device with one or more physical layer data test ports The data supplied to the test ports reflects the data received by the network device with minimal modification and no upper layer translation or processing, and supplying the data to the test ports does not impact or disrupt the service provided by the network device Only a small portion of the network device need be operable to send data to the test ports In addition, the test ports are programmable while the network device is operating and without impacting its operation Moreover, because the test ports are programmable—that is, they are not dedicated—they may be re-programmed for normal device operation

Systems and methods improving optical restoration time in networks

Abstract: Systems and methods for improving optical restoration time in a network include maintaining a status of wavelength load for a plurality of optical links in the network; utilizing the wavelength load to estimate a restoration time for one or more wavelengths being added to each of the plurality of optical links; and determining one or more restoration paths for the one or more wavelengths in the network and considering a total service restoration time in selecting a path for each of the one or more wavelengths, wherein each of the one or more restoration paths comprises one or more of the plurality of optical links.