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| Number | Title | Issue Date |
| 8175456 | Burst scheduling methods in optical burst switching system Provided is a burst scheduling method in an Optical Burst Switching (OBS) system in which a plurality of nodes are connected through a mesh-type network. When a TDB which has used many network resources via a plurality of nodes and an SHG burst generated in a previo... | 05/08/2012 |
| 8073327 | System and method for improving the efficiency of routers on the internet and/or cellular networks and/or other networks and alleviating bottlenecks and overloads on the network Optical routers are currently unable to do packet switching except by translating the data to electronic data and then back, which is very inefficient. The present invention solves this problem by optically marking and detecting the packet headers or parts of them, ... | 12/06/2011 |
| 8041214 | Photonic network packet routing method and packet router for photonic network A photonic network packet routing method includes the steps of optically encoding destination address information attached to an IP packet using light attributes, discriminating the encoded address information of the IP packet by optical correlation processing, swit... | 10/18/2011 |
| 7899327 | Photonic network packet routing method and packet router for photonic network A photonic network packet routing method includes the steps of optically encoding destination address information attached to an IP packet using light attributes, discriminating the encoded address information of the IP packet by optical correlation processing, swit... | 03/01/2011 |
| 7873275 | Photonic network packet routing method and packet router for photonic network A photonic network packet routing method includes the steps of optically encoding destination address information attached to an IP packet using light attributes, discriminating the encoded address information of the IP packet by optical correlation processing, swit... | 01/18/2011 |
| 7751708 | Optical switching transmission system with timing correction An optical transmission system capable of time difference correction without lengthening guard times, thereby improving optical packet transmission efficiency. A switching processor sets identical switching timing for input ports thereof such that signals input from... | 07/06/2010 |
| 7693421 | Optical packet buffering device and method A device that accepts input of asynchronously-arriving variable-length optical packets transmitted over a plurality of lightpaths, and outputs same to a single optical path, comprising: in order to prevent the optical packets from overlapping in the output lightpath... | 04/06/2010 |
| 7577358 | Apparatus, system and method for optical packet switching using frequency header In the present invention, a single-frequency tone is used as addressing header for each optical packet. The frequency of the single-frequency tone is situated within the baseband of the digital payload signal and is preferably a radio-frequency tone. The single-freq... | 08/18/2009 |
| 7561800 | Optical burst switching system and method using duplicate burst transmission An optical burst switching (OBS) system and a method using duplicate optical burst transmission is provided. In accordance with the present invention, optical bursts do not have the same priority when the duplicate optical bursts are transmitted in an OBS network so... | 07/14/2009 |
| 7539414 | Optical network with a void filling protocol independent of bit rate A communications station (4-i) for a WDM ring network is adapted to insert into an optical fiber (2) packets of optical signals carried by at least one wavelength and having a propagation direction in common with at least one other communication... | 05/26/2009 |
| 7529483 | Communication systems A communication system for the mutual interconnection of a plurality of lower traffic level (5 Terabit) switch nodes via a relatively higher traffic level (Petabit) connection bus, which system comprises in operative association with each node, a two part TDM optica... | 05/05/2009 |
| 7526203 | Apparatus and method for optical switching at an optical switch fabric Embodiments of the present invention provide a system and method for providing non-blocking routing of optical data through an optical switch fabric. The optical switch fabric can include an optical switching matrix with a plurality of inputs intersecting wit... | 04/28/2009 |
| 7440696 | Data multiplexing network, wavelength multiplexer, and data multiplexing transmission method In a data multiplexing network system, a first wavelength multiplexing function unit sets a plurality of different wavelengths which correspond to a plurality of different service classes, respectively, and maps each packet into each correspondent-wavelength which c... | 10/21/2008 |
| 7433597 | Deflection routing address method for all-optical packet-switched networks with arbitrary topologies A method of deflection routing a packet in an all-optical communication network is described. Routing and destination information is contained in the address header of the packet and is generated by the originating node while still in the electrical domain before co... | 10/07/2008 |
| 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 |
| 7421202 | Photonic label switching architecture A photonic label switching architecture. The architecture includes a photonic label extractor to split an externally input first optical packet data into a photonic label and a payload. Then, the photonic label is input to a photonic label processing and swapping de... | 09/02/2008 |
| 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 |
| 7412168 | MPLS application to optical cross-connect using wavelength as a label A label switching routing protocol for establishing a datapath as a sequence of locally unique labels in an optical communications network, is provided. A wavelength on an optical cross-connect is considered as a label, or one portion of a label. Timeslots may be as... | 08/12/2008 |
| 7409158 | Large-capacity optical router using electric buffer A large-capacity optical router is disclosed that exchanges data traffic such as IP packets, Ethernet frames, etc., at high speed in units of optical frames. The large-capacity optical router uses an electric buffer including input ports, output ports, an add port f... | 08/05/2008 |
| 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 |
| 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 |
| 7343104 | Apparatus and method for receiving a quadrature differential phase shift key modulated optical pulsetrain An optical differential phase shift key (DPSK) receiver, a method of demodulating an optical DPSK modulated signal and an optical processor capable of operating as either a DPSK receiver or DPSK transmitter. In one embodiment, the DPSK receiver includes: (1) an opti... | 03/11/2008 |
| 7340168 | System and method for optically labeled packet transmission A system and method for transmitting optically labeled packets using DPSK/ASK modulation. The system comprises a transmitter including at least two modulators adapted to provide DPSK modulation of a payload portion of optically labeled packets and ASK modulation for... | 03/04/2008 |
| 7340185 | Optical signal receiver with dual stage soft detection An optical receiver including a plurality of time delay elements and threshold decision elements configured to receive a signal representative of an optical signal. Each of the time delay elements is configured to impart an associated time delay to the signal. Each ... | 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 |
| 7327759 | Sequence-preserving deep-packet processing in a multiprocessor system Packets or frames of data may be compressed, encrypted/decrypted, filtered, classified, searched or subjected to other deep-packet processing operations before being distributed through the internet. The microprocessor system and method of the present invention prov... | 02/05/2008 |
| 7327747 | System and method for communicating data using a common switch fabric A communication system includes a first ingress content processor that receives information associated with a first traffic type. The first ingress content processor places the information associated with the first traffic type into a system cell having a common sys... | 02/05/2008 |
| 7324752 | Optical packet switching apparatus and methods An optical packet switch switches optical packets according to bit-rates at which the optical packets are provided. For example, optical packets that are received at similar bit-rates may be routed to a destination at separate time slots over a single channel wavele... | 01/29/2008 |
| 7324500 | Router network protection using multiple facility interfaces A router line card is partitioned to separate the packet forwarding functions from physical port interfacing. For each packet forwarding card, at least one redundant port interface is provided. Identical input packets are transmitted via these redundant input port i... | 01/29/2008 |
| 7317726 | Scheduling in a fast optical switch In a fast optical switch comprising a plurality of star couplers, channel switching, Time Division Multiplex (TDM) switching, or both may be provided. The operation of the fast optical switch is enabled by a fast scheduler comprising at least two scheduler modules. ... | 01/08/2008 |
| 7313328 | Node used in photonic network, and photonic network A multi-layer photonic network and nodes used therein are provided. The multi-layer photonic network comprises a packet network which performs switching and transfer in packet units, and a photonic network comprising optical transmission lines and photonic switches,... | 12/25/2007 |
| 7313094 | Node, an optical/electrical path integrated network using the node, and a program which controls the node The invention relates to a node, an optical/electrical path integrated network using this node, and a program which controls the node. The node according to the invention is suited to use in an optical/electrical path integrated network constructed from a plurality ... | 12/25/2007 |
| 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 |
| 7301896 | Redundant changeover apparatus A redundant changeover apparatus causing no frame synchronization loss even upon occurrence of changeover between working system and protection system. In case of an in-apparatus synchronization system, when two input signals which are mutually asynchronous in phase... | 11/27/2007 |
| 7298973 | Architecture, method and system of multiple high-speed servers to network in WDM based photonic burst-switched networks A modular reconfigurable multi-server system for use in a wavelength-division-multiplexed based photonic burst switched (PBS) network with variable time slot provisioning. An optical high-speed I/O module within the multi-server system enables it to serve as an edge... | 11/20/2007 |
| 7286755 | Method and apparatus for testing an optical component The present invention relates to a system for testing the connection paths of a switch fabric by using a spontaneously emitted signal as a test signal. The system includes at least one first module and at least one second module, wherein each one of the second modul... | 10/23/2007 |
| 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 |
| 7272310 | Generic multi-protocol label switching (GMPLS)-based label space architecture for optical switched networks An architecture and method for performing coarse-grain reservation of lightpaths within wavelength-division-multiplexed (WDM) based photonic burst switched (PBS) networks with variable time slot provisioning. The method employs a generalized multi-protocol label swi... | 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 |
