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| Number | Title | Issue Date |
| 8023819 | Method and apparatus for network fault detection and protection switching using optical switches with integrated power detectors Current network switching architectures require communication with a higher level network control plane, which can be slow to reroute communications, resulting in unacceptable losses of communications for customers. Examples embodiments of the present invention rero... | 09/20/2011 |
| 7877011 | Optical switch and optical crossconnect apparatus An optical switch is constructed by: first and second optical switches each having ports of k inputs and k outputs; a third optical switch of k inputs and k outputs which can perform a bi-directional transmission; 2k first optical circulators; 2k second optical circ... | 01/25/2011 |
| 7856183 | Circuit for transmitting signals in a network node, particularly for a channel card for an optical wavelength division multiplex (WDM) signal trasmitting device A circuit for transmitting signals in a network node, particularly for a channel card for an optical WDM signal transmission device, with a first holding device assigned to the local side of the network node, which can be freely equipped by means of a local-side tra... | 12/21/2010 |
| 7466915 | Mirror controller for optical switch A mirror controller of an optical switch comprises a signal generator (10, 82, 83) for passing the optical signal on the same light path as the one for optical communication using the optical switch, and an image analyzer (15, 16, 81) detecting the opt... | 12/16/2008 |
| 7421198 | Method for implementing the reconstruction of an optical network A method for implementing the reconstruction of an optical network. In the operating system (OS) side, the OS with trail function calculates data of the OS side and the network element side needed by the reconstruction base on the inputted physical information relat... | 09/02/2008 |
| 7398019 | Control apparatus and control method of optical signal exchanger An object of the invention is to provide a control apparatus and a control method having a simple constitution, which can stably perform switching of optical path in an optical signal exchanger, while suppressing an influence on a control due to the mechanical reson... | 07/08/2008 |
| 7394985 | Wavelength access server (WAS) architecture A wavelength access server (WAS) architecture provides aggregation of traffic streams of diverse data communication protocols as well as provision of wavelength resources in an optical transport network. The WAS provides functions such as service traffic adaptation,... | 07/01/2008 |
| 7389046 | Simplified switching interconnect using wavelength division multiplexing A network of spine switches and leaf switches is disclosed wherein the spine switches and leaf switches are coupled using a simplified interconnect made up of multiple signal carrying media (SCM's). In the simplified interconnect, “virtual” links are used rather... | 06/17/2008 |
| 7369765 | Optical network with selective mode switching A method for communicating optical traffic in a network comprising a plurality of network nodes includes receiving traffic to be added to the network at a network node. The network is operable to communicate received traffic in an optical signal comprising one or mo... | 05/06/2008 |
| 7366413 | Modular cross connect system with 3D-MEMS for optical telecommunication networks A modular cross connect system for optical telecommunication networks has the optical unit divided in at least two main bodies with one section for connection comprising the collimators and a main commutation section with MEMS devices. The first section is a fixed p... | 04/29/2008 |
| 7366417 | Delivering multicast services on a wavelength division multiplexed network using a configurable four-port wavelength selective crossbar switch A method and a system in which selected wavelengths of a wavelength division multiplexed (WDM) signal are modulated with multicast data for multicasting data services on an optical network. The WDM signal is received from a hub node of the optical network, such as a... | 04/29/2008 |
| 7356259 | Optical bypass upgrade configuration Optical bypass node upgrade configurations are disclosed: (1) a configuration where optical taps are pre-positioned in wavelength division multiplex (WDM) line systems terminating at optical-electrical-optical (OEO) core switching nodes to allow for future upgrade o... | 04/08/2008 |
| 7352966 | Method and apparatus for capacity-efficient restoration in an optical communication system A method and system provide capacity-efficient restoration within an optical fiber communication system. The system includes a plurality of nodes each interconnected by optical fibers. Each optical fiber connection between nodes includes at least three channel group... | 04/01/2008 |
| 7352758 | Dynamic bandwidth management using signaling protocol and virtual concatenation A communication system (10) employs switching circuits, such as an add/drop multiplexer (70) and another add/drop multiplexer (110). The bandwidth of a circuit switched connection between the switching circuits is altered without taking down the... | 04/01/2008 |
| 7343096 | Method and apparatus for in-service upgrading of OADM to wavelength selective switch of higher degree System and methods for upgrading an optical add-drop multiplexer (OADM) to higher degree wavelength selective router (WSR)/wavelength selective switch (WSS) are disclosed. For example, an OADM of degree-2 may be provisioned for upgrades to degree-3 and higher. The e... | 03/11/2008 |
| 7340175 | Non-uniform optical waveband aggregator and deaggregator and hierarchical hybrid optical cross-connect system Hierarchical hybrid optical networking is based on balancing cost and performance of optical networks by providing transparent (optical) switching of subsets of wavelengths in addition to opaque (electrical) switching of individual light paths. Effective use of wave... | 03/04/2008 |
| 7332234 | Optoelectronic device capable of participating in in-band traffic An optoelectronic device that has a network address (e.g., IF address) and participates in in-band traffic for purposes of performing functions (e.g., network diagnostics, network control, network provisioning, fault isolation, etc.) that are traditionally performed... | 02/19/2008 |
| 7313329 | All optical variable buffer queue useful in optical packet networks A variable optical buffer queue, particularly useful either as an input or an output queue in an optical packet router in a wavelength-division multiplexing (WDM) communication network. An input queue includes plural separately controllable optical delay units dispo... | 12/25/2007 |
| 7283739 | Multiple subnets in an optical ring network and method An optical network includes an optical ring and at least three subnets. Each subnet includes a plurality of add/drop nodes coupled to the optical ring. The add/drop nodes are operable to passively add a first traffic stream in a first direction on the optical ring a... | 10/16/2007 |
| 7283740 | Optical ring network with optical subnets and method An optical network includes a plurality of subnets. The subnets each include a plurality of add/drop nodes coupled to the optical ring and operable to passively add and drop traffic to and from the optical ring. The network further includes a plurality of gateway no... | 10/16/2007 |
| 7283745 | Methods and apparatus for constructing switch arrays for routing of optical signals so as to minimize power dissipation Techniques and systems for design of optical switch arrays so as to minimize power requirements are described. A design system includes a computer system hosting a design program. The design program receives parameters for the switch array, including a number N of o... | 10/16/2007 |
| 7277608 | Optical transmitter A wavelength-division multiplexing transmitter that is capable of enhancing its ability to compensate for a difference in light intensity between wavelengths. The wavelength-division multiplexing transmitter includes an optical branching part for branching a wavelen... | 10/02/2007 |
| 7277637 | Fiber to the home broadband home unit An apparatus and system are provided for delivering communication services such as video, data and telephony services to individual residential units. According to one embodiment, an optical network terminal (ONT) for providing communication services to a sin... | 10/02/2007 |
| 7274655 | Method and system for rehoming a digital subscriber line access Multiplexer A method and system are provided for rehoming a digital subscriber line access multiplexer between a first data switch and a second data switch or ports on a single data switch. An extension permanent virtual circuit is established between the first data switch and ... | 09/25/2007 |
| 7274873 | Optical transmission systems including optical switching devices, control apparatuses, and methods The optical systems of the present invention include optical switching device generally configured to control signal characteristic profiles over the pluralities of signal channels, or wavelengths, to provide desired signal characteristic profiles at the output port... | 09/25/2007 |
| 7272307 | Virtual protection channel for fiber optic ring network A single, normally inactive, protection ring, provides protection against a working channel failure in a fiber optic ring network. The protection channel is established and put into operation by a series of steps that are triggered by the detection of signal degrada... | 09/18/2007 |
| 7272314 | Optical crossconnect apparatus and optical transmission system An optical crossconnect apparatus which includes one terminal connected to a transmission path from one optical transmission terminal station and another terminal connected to a transmission path from another optical transmission terminal station, a first optical si... | 09/18/2007 |
| 7266297 | Optical cross-connect A bit-rate-transparent electrical space-division switching matrix is employed in an optical cross-connect and the input/output stage is constructed from simple, broadband optical receivers and transmitters. Since the switching matrix operates in unclocked manner, i.... | 09/04/2007 |
| 7266294 | Coupler-based optical cross-connect An optical cross-connect includes multiple input ports that each receives an optical input signal and multiple output ports that each output an optical output signal. The optical cross-connect also includes a distributing amplifier associated with each input port th... | 09/04/2007 |
| 7266295 | Modular reconfigurable multi-server system and method for high-speed networking within photonic burst-switched network A modular reconfigurable multi-server system with hybrid optical and electrical switching fabrics for high-speed networking within a wavelength-division-multiplexed based photonic burst-switched (PBS) network with variable time slot provisioning. An optical high-spe... | 09/04/2007 |
| 7263289 | Optical dynamic burst switch The present invention relates to a node used in an optical communication network, and comprises functions for transferring and receiving data, and a unit for establishing and releasing a cut through path to a node of the next stage, the establishing and releasing un... | 08/28/2007 |
| 7254328 | Reconfigurable directional optical system A reconfigurable directional optical system comprises N ports that can be configured individually as inputs or outputs. A system of this kind comprises at least one optical device having unidirectional inputs and outputs the total number of which is equal to or less... | 08/07/2007 |
| 7251416 | Container based crossconnect Systems and methods for optical cross connects which switch data at a container (packet) level. In one embodiment, a plurality of optical switch edges are coupled to an optical switch core via a minimal number of optical fibers. The switch core is configured to opti... | 07/31/2007 |
| 7248799 | Method and an improved device for controlling the power delivered at the output of a node of an optical network that switches bands of wavelengths A device (D) is dedicated to controlling the power of optical signals in a transparent switching node of an optical communication network that switches bands of wavelengths. The device includes, firstly, a controller (12) for comparing input optical power mea... | 07/24/2007 |
| 7242664 | Hybrid protection using mesh restoration and 1:1 protection A method, architecture and service of providing a multiple tiered pricing structure for providing a first service level to priority traffic where the priority traffic is protected via a 1:1 protection system, and a second service level for non-priority or extra traf... | 07/10/2007 |
| 7242861 | Optical path cross-connect and optical wavelength multiplexing diversity communication system using the same A protection system protects paths of internetwork communication between WDM ring networks, and includes a plurality of optical wavelength multiplexing networks having a plurality of nodes and a network management system for monitoring conditions of the plurality of... | 07/10/2007 |
| 7242860 | Optical protection switching using 2 by 2 switching functions A network is protected against interruption of service while one or more faulty switches or optical fiber transmission lines are repaired or replaced, by an interconnecting configuration of small N×N optical input/output switches, where N is 2 or greater than 2. Th... | 07/10/2007 |
| 7242859 | Method and system for providing protection in an optical ring communication network A method and system for providing tandem protection in a communication system. Path protection is provided using at least two redundant communication paths and selecting the communication having higher signal quality. Interface protection is provided through a prote... | 07/10/2007 |
| 7218857 | Method, apparatus and system for a re-configurable optical add-drop multiplexer A re-configurable optical add/drop apparatus separates an optical input signal into a first signal having a plurality of channels and a second signal having a plurality of channels and includes a channel router with drop ports, a wavelength-selective channel attenua... | 05/15/2007 |
| 7212739 | Protection switching arrangement for an optical switching system A protection arrangement for an optical switching system includes protection switching for switch planes in the optical core and for ports in the tributary cards. For a multiple layer switch core protection is also provided between layers. A first layer is for switc... | 05/01/2007 |
