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| Number | Title | Issue Date |
| 8184976 | Passive optical network system and operating method thereof The passive optical network includes a master station and slave stations connected via an optical fiber network including an optical splitter and a plurality of optical fibers. The master station includes a bandwidth control unit which decides a volume of a transmis... | 05/22/2012 |
| 8184975 | Passive optical network system and optical line terminator In a passive optical network system in which signals from a master station to plural slave stations are time-division multiplexed and transmitted, the slave stations different in transmission speed are mixedly contained. The master station (OLU) performs ranging for... | 05/22/2012 |
| 8150261 | Universal remote control device A universal remote control device controls both first and second electronic devices that may be remote from each other, via different communication channels. The remote control device is used with an optical fiber network, including a first optical transceiver coupl... | 04/03/2012 |
| 8145057 | Method for localizing an optical termination device in a passive optical network A method for localizing an optical network termination (ONT) of a passive optical network is disclosed. The passive optical network comprises an optical line terminal (OLT) and an optical distribution network (ODN) having a plurality of optical links. The ONT is con... | 03/27/2012 |
| 8139939 | Upgradeable passive optical network A passive optical network is upgraded by a subsystem PON2 for additional high speed communication. The additional subsystem PON2 enables independent high speed communication between a new type of optical network terminations with second downstream time... | 03/20/2012 |
| 8090261 | Network system, optical line terminating apparatus, and optical network apparatus A general object of the present invention is to provide an optical communication system in which an optical transmission power of an optical communication apparatus is controlled to be a required minimum power that apparatuses of all subscribers in the optical commu... | 01/03/2012 |
| 8086102 | Passive optical network based on reflective semiconductor optical amplifier Provided is a passive optical network (PON) based on a reflective semiconductor optical amplifier (RSOA). In the PON, seed-light-injection RSOAs are used in an optical line terminal (OLT) to achieve the color-less management of the wavelengths of OLT optic sources, ... | 12/27/2011 |
| 8050561 | Asymmetrical PON with multiple return channels A passive optical network (PON) system comprising a plurality of optical network units (ONUs) having one downstream receiver and one upstream transmitter, an optical line terminal (OLT) having a downstream transmitter and a plurality of upstream receivers, wherein e... | 11/01/2011 |
| 8041215 | ONT discovery in a DWDM hybrid PON LT configuration A method, a computer readable medium, and a system for discovering an Optical Network Terminal (ONT) in a Dense Wave Division Multiplex (DWDM) hybrid Passive Optical Network (PON) Line Terminal (LT), comprises implementing, by an Optical Line Termination (OLT), a ra... | 10/18/2011 |
| 8036532 | Passive optical network system, optical line terminal, and optical network unit In a PON system by WDM, IP broadcast can be received without oppressing a band used by a user for Internet communication. An OLT provides a first wavelength received in common by respective ONUs and plural second wavelengths by which the OLT and the respective ONUs ... | 10/11/2011 |
| 8036531 | Hybrid switch for optical networks A optical switch and switching system is provided for effecting a switchover from a first optical fiber to a second optical fiber includes a first, large scale switching component and a second, small scale switching component. The first, large scale switching compon... | 10/11/2011 |
| 8023821 | Low cost network architecture using thin optical transport layer This is a method for use in architecting low cost networks using a thin optical transport layer. A long reach hot pluggable interface is inserted onto an electrical switch resulting in a standardization of the optical layer. Standardized parts like the long reach ho... | 09/20/2011 |
| 8005362 | Passive optical network system and optical line terminal In order to be able to moderate the inclination of the PON burst reception characteristics and to improve the FEC effect, a first offset is used in a ranging window field, and a second offset, which is lower than the first offset value, is used in a burst data field... | 08/23/2011 |
| 8005361 | Station-side optical network terminal apparatus, subscriber-side optical network terminal apparatus, and optical communication system While continuously providing a service in an existing optical communication system, a service at another communication speed is realized at low cost. For this reason, a station-side optical network terminal apparatus is configured so that to one light-emitting unit ... | 08/23/2011 |
| 7965939 | Passive optical network system for the delivery of bi-directional RF services A system for providing bi-directional RF services over relating to a point-to-multipoint Passive Optical Network (PON). ... | 06/21/2011 |
| 7962037 | PON system and optical network unit Provided is an ONU that suppresses transmission of a useless multicast control message to a PON section and enables a communication bandwidth of the PON section to be effectively used. The ONU of the PON system has a multicast group management table that shows a cor... | 06/14/2011 |
| 7936991 | Optical line terminating apparatus and optical communication system An optical access communication apparatus and an optical access communication system for the coexistence of two wideband PON systems without using an expensive optical device or module. A low-speed PON and a high-speed PON have a same upstream wavelength, and an OLT... | 05/03/2011 |
| 7936992 | Apparatus of adjusting optical signal transmission timing In a light reception element such as an APD (Avalanche Photo Diode) used for receiving a high-speed and weak optical signal, it is possible to prevent the phenomenon of distortion of a signal inputted after a large-level light is received. A PON (Passive Optical Net... | 05/03/2011 |
| 7885542 | Format converter with smart multitap and upstream signal regulator Systems and methods for signal conversion with smart multitap are disclosed. Embodiments of the systems can be scalable to model different signal topologies, transmission frequencies, bandwidths, and distances. An exemplary embodiment of the systems and methods incl... | 02/08/2011 |
| 7822344 | System for communication of video, audio, data, control or other signals over fiber in a self-healing ring topology A system for communication of signals between remote devices and monitoring and control devices via fiber. The system in accordance with one aspect of the invention includes a plurality of remote interface units each coupled to a corresponding one of the remote devi... | 10/26/2010 |
| 7783195 | Format converter with smart multitap with digital forward and reverse Systems and methods for signal conversion with smart multitap are disclosed. Embodiments of the systems can be scalable to model different signal topologies, transmission frequencies, bandwidths, and distances. An exemplary embodiment of the systems and methods incl... | 08/24/2010 |
| 7778545 | Methods and systems for bandwidths doubling in an ethernet passive optical network Systems and methods for bandwidth doubling in an Ethernet passive optical network (EPON) enable an optical line terminal (OLT) to transmit downlink to at least one double rate optical network unit (ONU). The double rate transmission is preferably facilitated by use ... | 08/17/2010 |
| 7734178 | Passive optical network system, optical line terminal, and optical network unit In a PON system by WDM, IP broadcast can be received without oppressing a band used by a user for Internet communication. An OLT provides a first wavelength received in common by respective ONUs and plural second wavelengths by which the OLT and the respective ONUs ... | 06/08/2010 |
| 7725029 | Technique for asymmetric transport A technique for asymmetric transport is disclosed. In one particular exemplary embodiment, the technique may be realized by/as a method for asymmetric transport. The method may comprise transmitting, from a network element, at least one first signal through at least... | 05/25/2010 |
| 7684702 | Optical link monitoring system and method for passive optical network The present invention provides an optical link monitoring system for the passive optical network. The system includes a master monitoring device connected to an optical line terminal and a plurality of response devices respectively connected to a plurality of optica... | 03/23/2010 |
| 7680414 | Passive optical network system and operating method thereof A Passive Optical Network system implementing a parent station capable of receiving high-speed burst signals transmitted from a plurality of subsidiary stations to a parent station, with excellent bandwidth utilization efficiency in the link from the stations to the... | 03/16/2010 |
| 7643753 | Enhanced passive optical network (PON) processor An enhanced passive optical network (PON) processor adapted to serve a plurality of PON applications is disclosed. The PON processor is a highly integrated communications processor that can operate in different PON modes including, but not limited to, a gigabit PON ... | 01/05/2010 |
| 7630637 | PON system and optical network unit Provided is an ONU that suppresses transmission of a useless multicast control message to a PON section and enables a communication bandwidth of the PON section to be effectively used. The ONU of the PON system has a multicast group management table that shows a cor... | 12/08/2009 |
| 7616890 | System, device and method of expanding the operational bandwidth of a communication infrastructure Embodiments of the invention include a method, device an/or system of expanding the operational bandwidth of a communication infrastructure. An optical gathering box may include, according to some demonstrative embodiments of the invention, an optical connector to o... | 11/10/2009 |
| 7609967 | Method and apparatus for automatically upgrading passive optical networks (PONs) An apparatus automatically maintains bi-directional communication between an optical network unit (ONU) and a central office (CO) in a passive optical network (PON) when the CO changes from a first PON mode to a second PON mode. The apparatus senses a PON mode relat... | 10/27/2009 |
| 7596317 | Long-reach wavelength division multiplexing passive optical networks by using the position adjustment of broadband light source An optical network system includes a central office (CO) comprising an A-band BLS to be injected into a light source for downstream signals, an A-band BLS coupling device for coupling the A-band BLS, a first wavelength-division multiplexer/demultiplexer connected to... | 09/29/2009 |
| 7548694 | Apparatus of adjusting optical signal transmission timing In a light reception element such as an APD (Avalanche Photo Diode) used for receiving a high-speed and weak optical signal, it is possible to prevent the phenomenon of distortion of a signal inputted after a large-level light is received. A PON (Passive Optical Net... | 06/16/2009 |
| 7529484 | Triplexer transceiver using parallel signal detection An optical triplexer transceiver that utilizes parallel signal detection for use in broadband passive optical networks (B-PONs). The triplexer transceiver includes an optical filter comprising a first port coupled to a laser for receiving upstream optical data signa... | 05/05/2009 |
| 7440701 | Fiber-to-the-premise optical communication system An optical communication system includes a first wavelength filter, a bidirectional amplifier, and a second wavelength filter. The first wavelength filter can receive a downstream broad-spectrum signal and output a downstream spectrum-sliced signal in response to th... | 10/21/2008 |
| 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 |
| 7418204 | Passive optical network system providing simultaneously both broadcasting service and data service A passive optical network system is disclosed that simultaneously provides both broadcasting service and data service. The passive optical network (PON) amplifies the optical signals for the broadcasting service in an optical amplifier media of the local office by p... | 08/26/2008 |
| 7415205 | Wavelength division multiplexed self-healing passive optical network using wavelength injection method A wavelength division multiplexed self-healing passive optical network using a wavelength injection method includes a central office for coupling modulated multiplexed optical signals (MMOS) and broadband optical signals (BOS)for an upstream light source into one si... | 08/19/2008 |
| 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 |
| 7409154 | System and method for a protected optical access ring network An optical access network employs a ring topology in which connections between the network units and between the network units and the optical line terminal are via a protection switch. The protection switch monitors connections from the optical network units to det... | 08/05/2008 |
