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| Number | Title | Issue Date |
| 7580635 | Method, apparatus and system for optical communications The present invention discloses an optical communication system, a sub-rate multiplexing/de-multiplexing apparatus and the method thereof such that the optical communication system could meet the demand of Metropolitan Area Network (MAN) communications using the exi... | 08/25/2009 |
| 7424222 | Optical packet exchanger An optical packet exchanger is provided which prevents a transmittable capacity of an information signal from decreasing, and which facilitates the extracting an address signal even if a modulation speed for the information signal becomes high. An optical modulation... | 09/09/2008 |
| 7415207 | Digital cross-connect A digital cross-connect (DXC) (10) comprises: a plurality of ports (30-100) for receiving/outputting signals and switching and switching means (20) for selectively cross-connecting signals applied to one port to one or more other ports. T... | 08/19/2008 |
| 7394988 | Dual band wireless communication having high availability and high bandwidth A communication system receives information from a first communication link. The communication system transfers a free-space optical signal carrying the information and transfers a high-GHz wireless signal carrying the information. The communication system receives ... | 07/01/2008 |
| 7394983 | Method and apparatus for detecting optical switch fault by monitoring optical output transitions Provided are a method and an apparatus for detecting the fault of an optical switch. The apparatus includes an optical monitoring signal generator, a coupler, a splitter, a plurality of optical detecting and output power transition sensing units, and a fault determi... | 07/01/2008 |
| 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 |
| 7359592 | Single fiber links for full duplex aircraft data network A method for creating a full duplex fiber optic network using one single fiber optic cable of the multimode fiber type for simultaneous transmission and reception is described. The method includes the steps of equipping end user devices and switches with bidirection... | 04/15/2008 |
| 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 |
| 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 |
| 7336900 | Byte-wide optical backplane switch A byte-wide optical switch and switching method are provided. The optical switch includes a first set of ports for receiving in parallel an optical byte of data, and multiple second sets of ports each capable of outputting in parallel the optical byte of data. An ar... | 02/26/2008 |
| 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 |
| 7315694 | Apparatus for switching optical channel overhead in optical supervisory channel of optical transport network system and apparatus for forwarding optical channel maintenance signal A switching apparatus for switching an optical channel overhead in an optical supervisory channel is disclosed. The switching apparatus can suppress a terminated optical channel defect occurred by a defect of upper layers of the optical channel or a defect of the op... | 01/01/2008 |
| 7310479 | Multi-wavelength optical packet switch system with shared output buffer A multi-wavelength optical packet switch system with shared output buffer is disclosed, which includes N input fibers, N output fibers, an input device, a wavelength converter, a wavelength router, an output buffer, a wavelength classifier and a control device. The ... | 12/18/2007 |
| 7302186 | Optical transceiver and host adapter with memory mapped monitoring circuitry A host adaptor is configured to monitor operation of an optoelectronic transceiver. The host adapter includes a transceiver interface, memory, comparison logic and a host interface. The transceiver interface receives from the optoelectronic transceiver digital value... | 11/27/2007 |
| 7292785 | Optical transmission system constructing method and system An optical transmission system accomplishes optical transmission over a long distance by combining a multiplexing line terminal with optical amplifiers, linear repeaters, and regenerators with optical amplifiers combined together. The system also accomplishes the op... | 11/06/2007 |
| 7283746 | Optical virtual local area network The maximum number of virtual local area networks (VLANs) is increased beyond the number provided solely with the VLAN ID, by a factor related to the number of wavelengths of a Wavelength Division Multiplexing (WDM) used by a network switching. An optical VLAN numbe... | 10/16/2007 |
| 7277640 | Optical add/drop multiplexing systems The present invention overcomes problems associated with switch isolation, noise and crosstalk suppression, insertion loss, spurious reflections, wavelength tolerance, and compactness that are present in varying degrees in other add/drop systems. The present inventi... | 10/02/2007 |
| 7277639 | Bi-directional optical add/drop multiplexer for WDM optical networks Disclosed is a bi-directional optical add/drop multiplexer connected to an optical fiber for transmitting optical signals multiplexed in a wavelength division multiplexing optical network and which performs adding/dropping of the optical signals. The optical add/dro... | 10/02/2007 |
| 7272309 | System and method of routing data at a photonic core Embodiments of the present invention provide a system and method for routing optical data. In one embodiment of the present invention, data can routed in a non-blocking fashion from a plurality of the ingress edge units to a plurality of egress edge units by selecti... | 09/18/2007 |
| 7272312 | Optical router An optical router for selecting optical paths for optical signals and outputting the optical signals. The optical router includes an optical delay device to delay the optical signals containing routing information in a header. An optical switch having input ports' a... | 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 |
| 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 |
| 7245830 | Method and apparatus for scheduling transmission of data bursts in an optical burst switching network Apparatus and method for scheduling transmission of data bursts in an OBS network are described. One embodiment is a router in an OBS network, the router comprising a grouper module for collecting a group of BHPs arriving during a BHP collecting period and classifyi... | 07/17/2007 |
| 7236707 | All-optical compression systems An all-optical data compression system comprising: an input encoding unit having at least one input for receiving a data channel; an output decoding unit having at least one output for providing a data channel; a radiation guide fo... | 06/26/2007 |
| 7236699 | High capacity optical node An optical core node that includes optical switching planes interfaces, at input, with multi-channel input links and, at output, with multi-channel output links. The number of channels per link can differ significantly among the links, necessitating that the input (... | 06/26/2007 |
| 7206509 | Method and apparatus for temporally shifting one or more packets using wavelength selective delays A method and apparatus are disclosed for temporally shifting one or more packets using wavelength selective delays. The header information associated with each packet, together with a routing algorithm, routing topology information and internal OPTR state, is used t... | 04/17/2007 |
| 7194206 | Variable-density optical cross-connect architectures and upgrades An optical cross connect architecture is provided in which the density of spectral bands on optical signals through the cross connect may vary. The general functionality of such variable-density optical cross connect is to receive input optical signals that each hav... | 03/20/2007 |
| 7187865 | Hybrid photonic/electronic switching in a multi-channel network A system for hybrid electronic/photonic switching of traffic in a node of a communications network includes a plurality of interfaces; an electronic cross-connect (EXC); and a photonic cross-connect (PXC). Each interface is designed to translate a respective traffic... | 03/06/2007 |
| 7184661 | Transmission equipment for network and network transmission system According to the invention, in a transmission apparatus, there are provided an equipment supervision unit detecting an obstacle in the equipment and a switching control unit controlling the switching operation of transmission lines. When the equipment supervision un... | 02/27/2007 |
| 7174101 | Optical switching method and system therefor A method capable of optical packet switching even in a case where physical optical data in an optical packet switch has not the shape of a packet but the shape of continuous data, and a system therefore are provided. The optical switching method includes the steps o... | 02/06/2007 |
| 7173753 | Optical data receiver systems An optical data receiver for the distribution and demodulation of compressed TDM data packages comprises, optical distributor means to which the data packages are applied for selective distribution to a plurality of AWG optical demultiplexer/detector arrays, so that... | 02/06/2007 |
| 7171072 | Fast optical switch A fast optical switch is needed to realize an economical and scaleable optical-core network. In the disclosed optical switch, switching is effected by rapid wavelength conversion. Either channel switching, Time Division Multiplex (TDM) switching or both may be provi... | 01/30/2007 |
| 7171117 | Optical router An optical router is disclosed having at least one frequency router. The frequency router includes a plurality of input ports and a plurality of output ports. At least one input port simultaneously receives at least two optical signals to be frequency routed, while ... | 01/30/2007 |
| 7158724 | Method of detecting switching subnodes for switching wavelength division multiplexes A method of detecting switching subnodes in a monoblock wavelength division multiplex optical switching node, each subnode corresponding to a given level of granularity and to a given switching function. The method includes collecting information concerning how traf... | 01/02/2007 |
| 7149432 | Method and apparatus for equalization across plural data channels Optical equalization across N (an integer, N>1) channels of a multi-channel link of a communications network, is accomplished by averaging effects of optical performance variations within each of the M (an integer, M>1) parallel data signals. At a transmitting end n... | 12/12/2006 |
| 7136587 | System and method for providing simulated hardware-in-the-loop testing of wireless communications networks A system and method for efficiently and effectively simulating hardware-in-the-loop testing of a wireless communications network. The system and method employs an optical matrix-vector multiplier (MVM) for performing optical signal processing to simulate radio frequ... | 11/14/2006 |
| 7133616 | Wavelength-selective routing using an optical add/drop architecture A wavelength-selective routing capability is provided in a single network element by configuring the network element using a combination of add/drop network elements to route individual optical channels of WDM signals among a plurality of optical transmission paths ... | 11/07/2006 |
| 7133613 | Address determination circuit and optical communication system An address determination circuit makes an address determination of an optical packet to which a destination address and a source address are assigned on a bit-by-bit basis. The address determination circuit has an optical branching section which divides the optical ... | 11/07/2006 |
