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| Number | Title | Issue Date |
| 8155521 | Multi-degree cross-connector system, operating method and optical communication network using the same Provided are a network node which has a wavelength switching cross-connection function and can thus interconnect paths of a wavelength-division-multiplexed optical signal and convert wavelengths, and an operating method of the network node. Accordingly, it is possib... | 04/10/2012 |
| 8155520 | Multi-fabric shelf for a transport network A network element of a transport network has three fabrics housed within a single shelf of a telco rack, namely a packet fabric, an electrical fabric and an optical fabric. The shelf also includes inter-fabric circuitry, to bridge between the fabrics, e.g. packet-el... | 04/10/2012 |
| 8121478 | Method and apparatus for implementing non-blocking computer interconnection network using bidirectional optical switch According to an embodiment of the present disclosure, a bidirectional communications system includes a first non-blocking network including a bidirectional optical switch, a plurality of nodes, a plurality of optical transceivers connected between the bidirectional ... | 02/21/2012 |
| 8041213 | Optical transmission equipment and optical network In order to insert a regenerator into a wavelength cross-connect equipment, there is provided at least one port that demultiplexes one wavelength among the wavelength multiplexed signals that are input to a wavelength selective switch. An output of the port that dem... | 10/18/2011 |
| 8027585 | Optical communication method, optical communication device, and optical communication system The present invention relates to controlling wavelength switching in a plurality of nodes that are provided to increase the distance of signal transmission in inverse MUX transmission in which a high-speed line is divided into a plurality of low-speed lines for tran... | 09/27/2011 |
| 7983560 | Modular WSS-based communications system with colorless add/drop interfaces Modular WSS-based Communications system with colorless and network-port transparent add/drop interfaces is described herein. According to certain aspects of the invention, equipment architecture is provided that enables a linear, ring, and mesh optical network. The ... | 07/19/2011 |
| 7933519 | Optical cross-connect using wavelength selective switches An optimally-sized optical cross-connect that switches optical signal paths with a minimum number of wavelength selective switches and their interconnections. To switch optical signals of N routes (N=1, 2, . . . ), an optical cross-connect includes a 2×N (2-input, ... | 04/26/2011 |
| 7899326 | System for utilizing wavelength reachability and wavelength occupation status information to describe cross-connection capabilities in optical networks A system for communicating cross-connection information within an optical network by use of wavelength information is provided. Cross-connection information in Wavelength Division Multiplexing (WDM) devices is abstracted, to produce wavelength reachability informati... | 03/01/2011 |
| 7817918 | Path protection method for a WDM network and according node In a wavelength division multiplex (WDM) optical communications network having a plurality of nodes, each of which comprises a wavelength selective optical cross-connect having a plurality of switching matrices, each switching matrix being provided for switching wav... | 10/19/2010 |
| 7796884 | Wavelength path switching node apparatus and wavelength path allocation method A wavelength path switching node apparatus is provided that improves the utilization efficiency of wavelength resources by allocating wavelength paths by following traffic variations in packet units. A node apparatus on the wavelength path start point side includes:... | 09/14/2010 |
| 7787768 | Optical cross-connector containing multi-stage Clos network in which a single-stage matrix comprises one stage of the Clos network A WDM optical cross-connect has input and output channels for through traffic. A first group of matrices connects the input channels to the output channels. Each input channel is connected to an input of a matrix of the first group and each output channel is connect... | 08/31/2010 |
| 7764883 | Circuit structure for a transmission network node for transmitting high-bit, IP-based time division-multiplex signals, especially for a Multi-Gigabit Ethernet A circuit structure for a transmission network node for transmitting high bit-rate, IP-based time division-multiplexed signals, especially for an optical Multi-Gigabit Ethernet. The structure includes a bidirectional remote ports at two sides, each receiving and tra... | 07/27/2010 |
| 7702239 | Cross-connector for optical signals A cross connector for the transparent switching of optical signals is disclosed, comprising a first switching module with one or several switching modules of varying granularity, such as patch panel, wavelength groups or/and wavelengths. A second switching device is... | 04/20/2010 |
| 7672587 | Reconfigurable semitransparent optical switching device An optical switching device is provided. The device includes an input stage (1) comprising broadcast modules (MD1-MD3) that provide duplicates of the same multiplex, an output stage (2) comprising programmable multiplexer modules (OWS1... | 03/02/2010 |
| 7653307 | Optical switching device for a transparent node of high switching degree adapted to spectral equalization A device (D) dedicated to optical switching in a switching node (NC) comprises at least one first switching matrix (MC1) and one second switching matrix (MC2) coupled to each other and each comprising i) a first stage including Ni diffusion ... | 01/26/2010 |
| 7620323 | Method and apparatus for interconnecting a plurality of optical transducers with a wavelength division multiplexed optical switch In a WDM optical communication system that includes a plurality of nodes interconnected by communication links, a node is provided that includes a first plurality of transponders each generating and/or receiving an information-bearing optical signal at a different c... | 11/17/2009 |
| 7444047 | Multiplexing optical system A multiplexing optical system includes collimator lenses, a first condensing lens, a second condensing lens and an optical fiber. The collimator lenses collimate divergent laser beams that have been emitted from semiconductor lasers. The first condensing lens conden... | 10/28/2008 |
| 7437071 | Distributive optical switching control system A localized and distributive optical switching control system is separated into three localized systems: a sensor system, a processor system, and a position driver system. The sensor system detects the light transmission efficiency from the input port to the output ... | 10/14/2008 |
| 7437072 | Optical cross-connect with path selecting function An optical cross-connect for selecting a path between an access-line connected to a router and a trunk-line connected to another optical cross-connect the optical cross-connect has a hash-table H for randomly specifying a trunk-line number k as elements h(i,j)=k in ... | 10/14/2008 |
| 7430346 | Non-blocking cyclic AWG-based node architectures An optical switching architecture utilizing a multiple stage configuration of wavelength division multiplexed (WDM) component wavelength converters and cyclic arrayed waveguide grating (AWG) router. ... | 09/30/2008 |
| 7428383 | Architecture, method and system of WDM-based photonic burst switched networks An intelligent photonic burst switched (PBS) network includes edge nodes and switching nodes. The PBS edge node includes a flow classifier, flow manager, and ingress/egress PBS MAC layer components. The flow classifier classifies information received from outside th... | 09/23/2008 |
| 7400832 | Resilient switch A switch for the switching of communications system signals, with m input ports and n output ports, comprising two or more parallel switch matrices, each of size m×n, combined so that each switch matrix contributes to the available output power at each output port.... | 07/15/2008 |
| 7397792 | Virtual burst-switching networks A time-shared network comprising edge nodes and optical core nodes may be dynamically divided into several embedded networks, each of which covering selected edge nodes. At least one of the edge nodes may host an embedded-network controller operable to form multiple... | 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 |
| 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 |
| 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 |
| 7362974 | Method for planning or provisioning data transport networks A tool for static or dynamic planning of a WDM network with dedicated protection. The WDM network is represented by a layered graph having image nodes for each node of the network and horizontal arcs for each link of the network, so as to replicate in each layer the... | 04/22/2008 |
| 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 |
| 7349594 | Bidirectional wavelength cross connect architectures using wavelength routing elements Bidirectional wavelength cross connects include a plurality of ports, each configured to receive an input optical signals, each input optical signal having a plurality of spectral bands. At least one of the plurality of ports is disposed to simultaneously transmit a... | 03/25/2008 |
| 7349387 | Digital cross-connect Two or more cross-connect ICs are interconnected. Each IC directly receives some, but not all, of the system inputs, and outputs to some, but not all, outputs. Each cross-connect IC has a switch matrix that has the same number of inputs as the system, and a lesser n... | 03/25/2008 |
| 7349670 | Modular wireless test architecture and method A modular test chassis for use in testing wireless devices includes a backplane and a channel emulation module coupled to the backplane. The channel emulation module comprises circuitry for emulating the effects of a dynamic physical environment (including air, inte... | 03/25/2008 |
| 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 |
| 7330617 | Wavelength selective optical switch, and optical device provided with spectroscopic function A wavelength selective optical switch of the present invention separates a WDM light emitted from an input port of an input and output optical system, according to wavelengths, by a diffraction grating, and thereafter, condenses the lights of respective wavelengths ... | 02/12/2008 |
| 7317873 | Optical packet switching system An optical packet switching system in which transmission quality, reliability, and system management in optical packet switching control are improved. An optical packet switch section includes semiconductor optical amplifiers as gate switches multistage-connected on... | 01/08/2008 |
| 7310683 | Message relaying scheme based on switching in units of flows A message relay device suitable for contructing a ultra-high-speed message relaying system is disclosed. In the message relay device, a flow is detected by a prescribed condition, while a bypass channel capable of transferring messages with an amount of calculations... | 12/18/2007 |
| 7305186 | Method and apparatus for scheduling communication using a star switching fabric In one embodiment, a scheduler for use with a star switching fabric includes a scheduling star switching fabric operable to receive a plurality of packets each associated with one of a plurality of wavelengths and a plurality of selecting elements associated with th... | 12/04/2007 |
