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.

Outdoor hardened exo-modular and multi-phy switch

Abstract: The present invention relates to a data distribution device comprising of a core electronics suite having at least two data ports where each port is in communication with its own network transport medium. At least two broadband transceivers, each in communication with its own broadband data port, enable sending and receiving of broadband data signals. At least two converters, each in communication with its own transceiver, enable the conversion of RF modulated data signals into data packets and the conversion of data packets into RF modulated data signals. The device includes a data switch, in communications with at least two converters and at least two broadband transceivers, for inspecting and routing data packets between data ports; a processor in communication with the data switch that controls the sending and receiving of data packets between at least two converters; and an exterior housing that is sealed and environmentally hardened to allow the data switch, the processor, and the converters with their transceivers, to operate in an outdoor environment.

Communication link bandwidth fragmentation avoidance

Abstract: A method and system for routing a connection on a communication network. A first bandwidth pool is classified as a long lived bandwidth pool and a second bandwidth pool is classified as a short lived bandwidth pool. The long lived bandwidth pool is used to route connections having a duration that are expected to equal or exceed a predetermined time. The short lived bandwidth pool is used to route connections having a duration that are not expected to exceed the predetermined time. A request to route a connection on the communication network is received. At least one characteristic of the connection is determined and is used to determine whether to route the connection on the long lived bandwidth pool or short lived bandwidth pool.

Reduced complexity multiprotocol label switching

Abstract: A reduced complexity Multiprotocol Label Switching (MPLS) method, 30, a MPLS network element, 40, and a MPLS network, 10, utilize an MPLS operating regime whereby disjoint sets of one or more MPLS labels are uniquely and specifically associated with just one switch, i.e. each switch node is assigned one or more non-overlapping labels from the RFC 3032 20 bit label space to bind to particular service end-points; which then enables these labels to embody the core properties of a destination address (DA) in the network sub-domain in which they are used. The central property is that these DA labels are constant for a given forwarding path across the entire sub-domain, remaining unchanged at any extends in the network. Once that is achieved, any and all hop-by-hop signaling protocols are unnecessary, since there is no need for label swapping, and the label-switching-node binding information can be flooded by interior routing protocols only.

Use of tunable laser for optical performance monitoring in WDM system

Abstract: Consistent with the present invention, a tunable laser emits a monitoring signal which is combined with the WDM channels typically at the transmit side of a WDM system. At each monitoring point along the WDM system, the WDM channels are filtered out, the monitoring signal is sensed, and desired systems parameters (e.g., gain flatness, dispersion, PMD and OSNR) are measured. Accordingly, a single tunable element, i.e., the tunable laser, can be provided, thereby reducing costs. Moreover, system performance can be ascertained regardless of whether WDM channels are present.

Method for rapid determination of lowest cost wavelength routes through a photonic network based on pre-validated paths

Abstract: A method of setting up an end-to end connection between two end-points in an optical network. A plurality of validated paths in the network are defined. Each validated path extends between a respective pair of wavelength termination points and has requisite physical resources to carry signal traffic between its pair of wavelength termination points. A graph of the network is generated. An edge of the graph corresponds with a respective validated path, and a vertex of the of the graph corresponds with at least one wavelength termination point. The graph is analyzed to compute an end-to-end path between two vertices respectively corresponding with end-points of the end-to-end connection, and the end-to-end connection set up using the computed path.