Did You Know...
...that the Slinky toy was the result of a failed attempt by engineer Richard James to produce an antivibration device for ship instruments? His goal was to develop a spring that would instantaneously counterbalance the wave motion that rocks a ship at sea. Instead, he developed the Slinky.
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| Number | Title | Issue Date |
| 8180224 | Method, apparatus and system for transmitting Ethernet signals in optical transport network A method, apparatus and system for transmitting Ethernet signals in an OTN are provided. The method may include: mapping the Ethernet signals to timeslot units, where a VCG composed of multiple OPUs is divided into the timeslot units; mapping the Ethernet signals in... | 05/15/2012 |
| 8090262 | Service handover method, optical network system, handover equipment and PE equipment in an OVPN An optical network system disclosed in an embodiment of the present invention contains a PE and a handover equipment located between the PE and a CE. The PE is adapted to provide optical network access for the CE. The handover equipment is adapted to disconnect a CE... | 01/03/2012 |
| 7653312 | Multiple bit rate optical communication method, optical network unit and optical line terminal The present invention is a method of transmitting data of different bit rates in a simple manner and, if positive minimal multiples whose multiple operation values on the bit time lengths 1/Ai for a plurality of communication bit rates Ai become common are minimal m... | 01/26/2010 |
| 7620325 | Transmission apparatus with function of multi-step bandwidth assignment to other communication apparatuses A transmission apparatus for use in fixed bandwidth communications and variable bandwidth communications. The transmission apparatus has a memory unit, which stores information contained in a frame and indicating the amount of data to be transmitted from a terminal ... | 11/17/2009 |
| 7583898 | Signal-detect-based ranging technique for burst-mode optical systems In a passive optical network (PON), a burst-mode receiver of an optical line terminator (OLT) is initialized during an initialization phase, such as ranging, by asserting one or more reset signals in response to detecting the presence of a packet signal. For example... | 09/01/2009 |
| 7558482 | Method for dynamically establishing logical link in PON systems and an optical network unit for the method The invention is applied to a PON system including an optical line terminal (OLT) at a center station, a plurality of optical network units (ONUs) at subscribers' sites, and an optical transmission line shared by the plurality ONUs to optically connect between the O... | 07/07/2009 |
| 7437076 | Data transmission method in gigabit ethernet passive optical network Disclosed is a upstream data transmission method in a gigabit Ethernet-passive optical network (GE-PON) system. In the GE-PON system including an optical line termination having a scheduler and optical network units connected to the optical line termination, the opt... | 10/14/2008 |
| 7428385 | Ethernet PON using time division multiplexing to converge broadcasting/video with data An Ethernet passive optical network provides a subscriber with a high speed and large capacity data service and a real time digital broadcast/video service. The network includes an optical line terminal for frame-multiplexing broadcast/video signals, which are obtai... | 09/23/2008 |
| 7421203 | Method for transmitting packet in wireless access network based on wavelength identification code scheme A method for transmitting a packet in a wireless access network based on a wavelength identification code scheme. The method comprises the steps of connecting n number of RNCs (Radio Network Controllers) to one sub-ring where the “n” is a positive integer, and a... | 09/02/2008 |
| 7412169 | FTTH system for convergence of broadcasting and communication through switched broadcasting A fiber to the home FTTH network for convergence of broadcasting and communication is disclosed. The network includes: an OLT for receiving and converting a first predetermined number of broadcast signals and an Ethernet signal into a plurality of converted optical ... | 08/12/2008 |
| 7409114 | Optical modulator An optical modulator using a thin plate including a portion having 20 μm or less thickness, capable of selecting a specific polarized wave from a light wave which propagates in an optical waveguide in the modulator without reduced productivity. The modulator includ... | 08/05/2008 |
| 7398021 | Optical transmitter and passive optical network using the same An optical transmitter including a multi-lambda source to output injection light consisting of a plurality of injection wavelengths in channels, a circulator having a first port, a second port, and a third port, the circulator receiving the injection light at the fi... | 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 |
| 7389048 | Optical wavelength-division multiple access system and optical network unit The present invention provides an optical wavelength-division multiple access system and a corresponding optical network unit. A wavelength band Da (wavelengths λd1 to λdn) for downlink optical signals corresponding to the n ONUs, a wavelength band Ua (wave... | 06/17/2008 |
| 7389047 | Optical ring transmission network The network comprises an optical ring link (F) and a concentrator (HUB) that sends via one end of the link “downlink” optical signals carried by respective wavelengths and receives “uplink” optical signals via the other end of the link. The link is divided i... | 06/17/2008 |
| 7386236 | Multiple wavelength TDMA optical network A passive optical network which employs multiple wavelengths to increase overall system bandwidth, with each wavelength being shared by multiple optical network units (ONUs) according to a time division multiple access (TDMA) protocol. The upstream TDMA traffic ther... | 06/10/2008 |
| 7382982 | Ethernet passive optical network for integrating broadcast and communication based on time division multiplexing scheme An Ethernet-PON integrates broadcast/communication through time division multiplexing, which provides users with high-speed, high-volume communication data and high-quality, real-time digital broadcast/image data. An OLT performs a switching operation on a plurality... | 06/03/2008 |
| 7373084 | Optical network termination device for use in passive optical network based on WDM/SCM scheme A termination device for use in a WDM-SCM PON system can effectively support a multi-channel integration function of a WDM/SCM PON system. The termination device contained in a termination end of a WDM/SCM (Wavelength Division Multiplexing/Sub-Carrier Multiplexing) ... | 05/13/2008 |
| 7369771 | Optical network terminator and optical network connection method using it An optical network terminator of the present invention includes an optical wavelength division multiplexer for receiving an optical signal and incoherent light. An optical detection unit converts a downstream high speed and low speed optical signals into electrical ... | 05/06/2008 |
| 7369769 | Ethernet passive optical network ring and its method of authorization and collision detection An Ethernet passive optical network (EPON) ring for providing protection against fiber failures. The optical network unit (ONU) is coupled to the ring fiber by a three-port passive optical splitting module that has three two-way optical passages. By the three two-wa... | 05/06/2008 |
| 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 |
| 7359637 | Self-healing passive optical network A self-healing passive optical network is disclosed. The network includes a central office and a remote node connected to the central office through a main optical fiber. The remote node transmits one portion of power of the upstream optical signal, which has been i... | 04/15/2008 |
| 7356209 | Method and apparatus for optically powering and multiplexing distributed fiber optic sensors An optical power converting apparatus is provided that may be used with remote sensors. A plurality of remote sensors may be coupled to a backbone optical fiber with each sensor having an optical power converter that receives an optical signal from a head end of tha... | 04/08/2008 |
| 7349629 | Methods and systems for creating a digital interconnect fabric An optical network provides a digital interconnect fabric allowing nodes to seamlessly communicate with each other. Each node is connected to a bi-directional optical bus through passive optical interface devices. The optical interface devices route signals from eac... | 03/25/2008 |
| 7340171 | FTTH system for broadcast/communication convergence using IEEE 1394 A broadcast/communication convergence system, and an FTTH (Fiber To The Home) system that can accommodate broadcast signals of various channels and variable band signals by converging broadcast and communication signals and transmitting the converged broadcast and c... | 03/04/2008 |
| 7321730 | Method and apparatus for the transmission fault detection in an access network An optical network unit (ONU) interconnected by passive optical network (PON) equipment to an optical line terminal (OLT) is identified using secondary modulation of the optical carrier to impress an identifier of the ONU onto the carrier. This resolves a recurring ... | 01/22/2008 |
| 7315695 | Method and apparatus for defining optical broadband services on an optical communication network A method and apparatus for defining optical broadband services on an optical communication network enables broadband optical services to be built from basic service building blocks. According to an embodiment, a service definition software platform includes the abil... | 01/01/2008 |
| 7308205 | Optical transmission apparatus In an optical transmission apparatus in which a plurality of nodes are optically connected to one another via an optical transmission path, a light signal which is coded so that a mixture ratio of 1 and 0 constituting data is made close to 50% is transmitted through... | 12/11/2007 |
| 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 |
| 7286759 | System and method for dynamic wavelength assignment in wavelength division multiplex ring networks System and method for dynamically assigning wavelengths wavelength division multiplex (“WDM”) ring networks is described. In one embodiment, the invention comprises a method for dynamic wavelength assignment on a ring in a WDM network comprising, for each new re... | 10/23/2007 |
| 7283594 | Impedance modulation signaling Signalling between transmitting means and receiving means wherein signals from the transmitting means are subjected by the receiving means to deliberate reflections and resulting signals are transmitted back as meaningful at the transmitting means, different deliber... | 10/16/2007 |
| 7283749 | Fiber and wire communication system This invention provides a new architecture for a communication system between head-ends and end-users which expands bandwidth and reliability of the communication system. A mux-node receives communication signals from a head-end and forwards the received communicati... | 10/16/2007 |
| 7280719 | Wideband optical module and PON using the same A wideband optical module includes a downward wideband light source for generating downward light, an upward wideband light source for generating upward light, a first circulator including a first to a third port for outputting multiplexed downward optical signals t... | 10/09/2007 |
| 7272321 | Passive optical network A passive optical network. The optical network has an optical fiber ring with ends terminating at an optical line terminal. The optical line terminal transmits signals through the fiber ring to optical network units passively connected to the fiber ring. The optical... | 09/18/2007 |
| 7263245 | Method and apparatus for optically powering and multiplexing distributed fiber optic sensors An optical power converting apparatus is provided that may be used with remote sensors. A plurality of remote sensors may be coupled to a backbone optical fiber with each sensor having an optical power converter that receives an optical signal from a head end of tha... | 08/28/2007 |
| 7248802 | Distribution of a synchronization signal in an optical communication system The invention relates to the distribution of a synchronization signal in an optical communication system which is inherently asynchronous. In order to accomplish a cost-efficient mechanism for transmitting a synchronization signal in such a system, the amplitude of ... | 07/24/2007 |
| 7239813 | Bit synchronization circuit and central terminal for PON systems A bit synchronization circuit composed of a multiphase data sampling unit for converting each received burst data sets to multiphase data trains, a phase determination unit for generating a control signal indicating an optimum phase data train, an output data select... | 07/03/2007 |
| 7209663 | Apparatus and method for repeating signal by using wireless optical transmission A repeating apparatus and method using wireless optical transmission is disclosed. The repeating apparatus includes a donor device for transmitting two identical copies of an optical signal by receiving a RF signal from a base station and electro-optic converting th... | 04/24/2007 |
| 7203422 | Optical network unit, wavelength splitter, and optical wavelength-division multiplexing access system In an optical wavelength division multiplexed access system, a center unit (OSU) and n optical network units (ONUs) are connected together via a wavelength splitter and optical fiber transmission lines, and downstream optical signals from the OSU to the ONUs and ups... | 04/10/2007 |
| 7190903 | Fiber and wire communication system This invention provides a new architecture for a communication system between head-ends and end-users which expands bandwidth and reliability of the communication system. A mux-node receives communication signals from a head-end and forwards the received communicati... | 03/13/2007 |
