Class / Patent application number | Description | Number of patent applications / Date published |
398041000 | DUPLEX | 38 |
20080232799 | Method and apparatus for duplex communication in hybrid fiber-radio systems - An apparatus and method for enabling cost-effective duplex communication by diplexing one of down stream signals for frequency up-conversion in a hybrid fiber-radio system includes diplexing an unmodulated mode signal among beating signals between a master laser and an injection-locked slave laser and using the diplexed signal for down-conversion in upstream transmission, thereby eliminating the need for expensive high-frequency local oscillators for frequency conversion. Higher radio frequency signals can be generated using beating between basic modes and satellite modes such as FWM conjugates of the master laser and slave laser. Cost-effective systems, stabilization of a light source and improved transmission performance may be achieved by using a diplexer instead of an expensive high-frequency local oscillator. | 09-25-2008 |
20080253766 | Synchronization and Processing of Secure Information Via Optically Transmitted Data - A method and device enables data communication via optical pulses from a light source of an electronic device. A data transfer interface is provided to support processing of selected data by a processor of the electronic device. The electronic device comprises an illumination light source, which is selectively utilized for illuminating a component in the electronic device and for transmitting data via optical pulses. An optical receiver also receives optically transmitted data. The transmission and receiving of the data is provided on a bidirectional duplex communication link created with a second optical receiver and an optical data transmission mechanism of a second electronic device. | 10-16-2008 |
20080260380 | Method of Providing Duplex Optical Communications and Optical Modulator Therefor - Methods of providing duplex free-space optical, communication comprising receiving a time-shift keying (TSK) encoded signal and selectively re-modulating—and optionally retro-reflecting—received TSK pulses so as to transmit an on-off keying (OOK) signal. Related apparatus and signals are also provided. | 10-23-2008 |
20090028558 | Method for providing visible light communication in a visible light communication system - A method of providing a visible light communication in a data link layer of a visible light communication system adopting an infrared communication link connection protocol includes: broadcasting a discovery exchange station identification (D-XID) frame; generating a visible frame to provide a visibility to a link for a specified waiting time period for responding to the broadcast D-XID frame; exchanging a set normal response mode (SNRM) frame and an unnumbered acknowledgement (UA) frame for requesting a link setting between the transmitting and receiving terminals; generating visible frames for a waiting time for receiving the SNRM frame and the UA frame; exchanging an information transfer frame (I-frame) and a receive ready (RR) frame, which is a response to the I-frame, between the transmitting and receiving terminals; and generating visible frames for a specified waiting period for receiving the I-frame and the RR frame. | 01-29-2009 |
20090103917 | Bidirectional HDCP-based data transmission apparatus using single optical fiber - The present invention provides a bidirectional HDCP-based data transmission apparatus using an optical fiber which includes a core having a first facet and a second facet. The bidirectional HDCP-based data transmission apparatus includes a forward transmission module and a backward transmission module. The forward transmission module is used for emitting at least two forward light signals into a first end of a core of the optical fiber when being driven. Afterward, the at least two forward light signals are transmitted over the optical fiber immediately. The backward transmission module is used for receiving the at least two forward light signals transmitted over the optical fiber and emitting at least one backward light signal into a second end of the core of the optical fiber when being driven. Then, the backward light signal is immediately transmitted over the optical fiber, wherein the forward transmission module also receives the at least one backward light signal transmitted over the optical fiber. | 04-23-2009 |
20090196604 | System for combining high-definition video control signals for transmission over an optical fiber - An apparatus and method are provided for combining, transmitting and receiving two or more high definition video control signals, namely, DDC and HDCP over a single bi-directional optical fiber or a duplex optical fiber, wherein a source and a sink are in communication with each other through the apparatus, and wherein the sink includes EDID and HDCP registers. A single transmitter module and receiver module pair are provided wherein the transmitter module includes replications of the sink EDID and HDCP registers, whereby any write request from the source to the sink is stored within the replicated EDID and HDCP registers so that any read request from the source to the sink can be answered immediately. Optional high definition video control signals may also be included in the system including Hot Plug, CEC, 5V and infrared. | 08-06-2009 |
20090220227 | SMALL FORM FACTOR PLUGGABLE (SFP) OPTICAL TRANSCEIVER MODULE AND METHOD - A small form factor pluggable (SFP) optical transceiver module and method for performing optical communications are provided. The SFP optical transceiver module has a housing to which a duplex receptacle is secured. The duplex receptacle has a C-shaped opening, the upper and lower portions of which are defined by upper and lower flexible retaining elements for receiving and retaining a duplex optical connector therein. An electrical assembly of the module is secured within the transceiver module housing. The electrical assembly comprises a PCB, the back end of which is configured as a plug end for removably plugging the PCB into a receptacle of an external communications management system. | 09-03-2009 |
20090279889 | Method and Apparatus for Transporting Computer Bus Protocols Over an Optical Link - A system is provided for implementing PCI Express protocol signals over an optical link. A transmission circuit is used to provide an electrical-to-optical conversion, a receiving circuit provides an optical-to-electrical conversion, and a sideband circuit is used to provide and receive control information. | 11-12-2009 |
20100104278 | NETWORK INTERFACE UNIT FOR MODULAR FURNITURE - A network interface unit (NIU) for a modular workstation includes a housing. One or more input network adapters on the housing receive input connectors of a first multi-network cable that is connected to a distribution network. One or more output network adapters on the housing receive output connectors of a second multi-network cable that is connected to another NIU of another modular workstation to provide for a daisy chain connection. One or more workstation adapters are provided on the housing for providing connections to one or more networks of various security levels. Cables that are connected to one or more CPUs or telephones of the workstation are connected to respective ones of the workstation adapters. The workstation adapters of the NIU may provide one or more of visual, physical, and geographical verification and segregation of the network connections to enhance the integrity of the security of the various networks available at the NIU. | 04-29-2010 |
20100111524 | METHOD AND TERMINAL FOR TRANSMITTING DATA - Embodiments of the present invention provide a method for transmitting data, a Coaxial-cable Line Terminal (CLT) and a Coaxial-cable Network Unit (CNU). The method, applicable to a coaxial network including at least one Coaxial-cable Line Terminal (CLT) and multiple Coaxial-cable Network Units (CNUs), the CLT being connected with each of the CNUs through a shared coaxial medium, includes: transmitting, by the CLT, a control message to each of the CNUs. The control message contains information of an uplink transmission period of time that can be occupied by each CNU during one period, and uplink transmission periods of time for the CNUs are not overlapped with one another so that uplink data transmitted by the CNUs do not collide with each other. The embodiments of the present invention allocate a shared transmission medium in an EPCN system, and guarantee normal physical layer communications of the EPCN system. | 05-06-2010 |
20100183300 | OPTICAL ACCESS NETWORK - Provided is an optical access network capable of realizing protection control without affecting an E-PON for providing an Ethernet service. In the optical access network comprising the E-PON having a transmission line which is duplexed between an OLT and a plurality of ONTs, the OLT includes a layer- | 07-22-2010 |
20100239247 | OPTICAL NETWORK UNIT | 09-23-2010 |
20100278530 | DISTRIBUTED ANTENNA SYSTEM FOR WIRELESS NETWORK SYSTEMS - A distributed antenna system is provided for communicating with a plurality of base stations. The distributed antenna system includes a system controller and a master unit communicating with at least one of the plurality of base stations. A remote unit communicates over a high data rate media with the master unit and/or a downstream remote unit. Alternatively, the distributed antenna system includes a controller and a digital time/space crosspoint switch controlled by the controller. A digitizing transceiver is in communication with the digital time/space crosspoint switch. The crosspoint switch is configured to transmit and receive digital data through the digitizing transceiver. | 11-04-2010 |
20100322624 | BIDIRECTIONAL TRANSMISSION NETWORK APPARATUS BASED ON TUNABLE RARE-EARTH-DOPED FIBER LASER - The present invention discloses a bidirectional transmission network apparatus based on a tunable rare-earth-doped fiber laser source. It is useful in wavelength-division-multiplexing access networks. The fiber ring laser not only generates downstream data traffic but also serves as the wavelength-selecting injection light source for the Fabry-Pérot lasers (or vertical cavity surface emitting lasers) located at the subscriber site. The fiber laser is constructed based on optical filtering, polarization control and noise suppression techniques. | 12-23-2010 |
20100329669 | HIGH-SPEED OPTICAL TRANSCEIVER, A BI-DIRECTIONAL DUPLEX OPTICAL FIBER LINK, AND A METHOD FOR PROVIDING A BI-DIRECTIONAL DUPLEX OPTICAL FIBER LINK - A duplex optical fiber link is provided that includes two bi-directional optical fiber links. Each of the bi-directional links includes a multimode optical fiber and an optical transceiver connected to each of the ends of each of the fibers. Each of the optical transceivers includes a bi-directional optical multiplexer (MUX) that is configured to simultaneously optically couple optical data signals produced by a laser diode of the transceiver into an end of one of the fibers and to optically couple an optical data signal passing out of the end of one of the fibers onto a photodiode of the transceiver. The laser diodes operate at a data rate of at least 10 Gb/s such that each optical transceiver transmits and receives optical data signals at an aggregate data rate of at least 20 Gb/s. Consequently, the bi-directional duplex optical link has an aggregate data rate of at least 40 Gb/s. | 12-30-2010 |
20110019998 | SMALL FORM FACTOR PLUGGABLE (SFP) OPTICAL TRANSCEIVER MODULE AND METHOD - A small form factor pluggable (SFP) optical transceiver module and method for performing optical communications are provided. The SFP optical transceiver module has a housing to which a duplex receptacle is secured. The duplex receptacle has a C-shaped opening, the upper and lower portions of which are defined by upper and lower flexible retaining elements for receiving and retaining a duplex optical connector therein. An electrical assembly of the module is secured within the transceiver module housing. The electrical assembly comprises a PCB, the back end of which is configured as a plug end for removably plugging the PCB into a receptacle of an external communications management system. | 01-27-2011 |
20110026919 | HALF-DUPLEX, SINGLE-FIBER (S-F) OPTICAL TRANSCEIVER MODULE AND METHOD - A half-duplex, single-fiber (S-F) optical transceiver module is provided in which a light source, such as a laser diode or a light-emitting diode (LED), is mounted on an edge region of a photodiode to increase the amount of surface area of the photodiode that is available for absorbing light received in the optical transceiver module. The S-F optical transceiver module has a relatively simple optical coupling system for coupling light between an end face of an optical fiber and the photodiode and laser diode or LED with high optical coupling efficiency and reduced optical crosstalk. | 02-03-2011 |
20110081145 | DEVICE AND METHOD TO ALLOW FOR UNI-DIRECTIONAL TRAFFIC ON LOCAL AREA NETWORKS - A communication network access device is adapted for duplex communication and provides transmit and receive signal paths. A controllable socket is coupled to the transmit and receive signal paths and linked to a control interface for activating/deactivating the control interface. A pluggable module is coupled to the transmit and receive signal paths via the controllable socket in an activated status and to a transmission path carrying uni-directional signals. The module includes a first optical device and a splitter in the transmission path and is coupled to a second optical device via the splitter. The second optical device responds to a portion of uni-directional signals provided by the splitter for placing the communication access device in a link up condition for uni-directional signals provided by the first optical device to the transmission path serving an optical local area network. | 04-07-2011 |
20110200329 | METHOD AND SYSTEM FOR BI-DIRECTIONAL COMMUNICATION OVER A SINGLE OPTICAL FIBER - Gigabit Ethernet connectivity is realized using off-the-shelf GIGABIT INTERFACE CONVERTER transceivers, wave division multiplexer/demultiplexers, and a single optical fiber. Simultaneous and bi-directional optical communication over a single optical fiber connecting two or more nodes is achieved by using at least one GIGABIT INTERFACE CONVERTER transceiver having at least one optical signal output and an optical signal input that are of different wavelengths from each other. | 08-18-2011 |
20110211832 | 2-TO-1 OPTICAL COUPLER THAT UTILIZES D-SHAPED PLASTIC OPTICAL FIBERS (POFs), A BI-DIRECTIONAL OPTICAL COMMUNICATIONS LINK THAT EMPLOYS THE 2-TO-1 POF OPTICAL COUPLER, AND A METHOD - D-shaped POFs are used to form a 2-to-1 optical coupler. The D-shaped POFs are produced via an extrusion process that is relatively inexpensive to perform and that can be performed with relatively high manufacturing throughput. The D-shaped POFs are bonded together to form a coupler end face having a generally circular cross-sectional area. The coupler end face is interfaced with an end face of a main POF that is generally circular in cross-sectional shape. The resulting D-shaped 2-to-1 optical POF couplers have relatively low insertion loss and relatively high optical coupling efficiency. | 09-01-2011 |
20110262131 | METHOD AND ARRANGEMENT FOR TRANSMITTING SIGNALS IN A POINT TO MULTIPOINT NETWORK - Bidirectional data signals are exchanged between a central unit and a plurality of network terminals. The optical carrier frequencies of the downstream and upstream signals are chosen so that reflections do not interfere with the selected signal at the optical network unit and not with the received upstream signals at the central unit. The optical network units select their associated downstream signal and generate an associated upstream signal. | 10-27-2011 |
20110305455 | Dynamic Scheduling Using PON Bandwidth Allocation On Lower Aggregation Levels - The present invention relates transmission network, which involves Passive Optical Network and thereto connected units, e.g. Optical Network Units. It is an object of the present invention to provide a solution to the upstream data packet traffic congestion problem in transmission networks that comprises a PON system. Said problem is solved by providing adapted node devices and methods for such scheduling control that within the prescribed standard requirements, e.g. QoS, for passive optical network systems eliminate the congestion problem. | 12-15-2011 |
20110318000 | OPTICAL BUS - An optical bus. Optical sub-assemblies are used to connect lengths of optical fiber to form a single optical fiber that is a bus. A master transceiver may be connected to one end of the fiber and nodes can be connected to the optical sub-assemblies. Each optical sub-assembly includes a center fiber with a mirror that enables each connector to reflect optical signals out of the fiber and that enables a node to launch optical signals on the optical bus. The optical bus can also be connected with a second transceiver that may be used to deliver optical power to the attached nodes. Some nodes include two optical subassemblies to enable bidirectional communication on the optical bus. | 12-29-2011 |
20120163811 | ULTRA-HIGH BANDWIDTH, MULTIPLE-CHANNEL FULL-DUPLEX, SINGLE-CHIP CMOS OPTICAL TRANSCEIVER - A novel parallel optical module having combined optical signal transmit and receive function for high-speed performance. The optical module includes a plurality, e.g., sixteen 10-Gb/s transmitter and receiver channels for a 160-Gb/s bidirectional aggregate data rate. The module utilizes a single-chip CMOS optical transceiver containing both transmitter and receiver circuits. 16-channel high-speed photodiode (PD) and VCSEL arrays are flip-chip attached to the low-power CMOS IC. The substrate emitting/illuminated VCSEL and PD arrays operate at 985 nm and include collimating lenses integrated into the backside of the substrate. The IC-OE assembly is then flip-chip attached to a high density organic package forming the transceiver optical module. The exclusive use of flip-chip packaging for both the IC-to-optoelectronic (OE) devices and for the IC-to-organic package minimizes the module footprint and associated packaging parasitics. | 06-28-2012 |
20130028600 | Configurable Multi-Format Transceiver System - A communication system includes a configurable transceiver that accommodates multi-band, multi-format signals by incorporating a duplex transceiver circuit, a simplex transceiver circuit and at least two switches. A first switch may be operated so as to configure the configurable transceiver to propagate duplex signals, such as for example, frequency division multiplexed (FDD) signals. The second switch may be operated so as to configure the simplex transceiver circuit to provide signal propagation of various types of signals in either a receive direction or a transmit direction. The various types of signals include time division multiplexed (TDD) signals. | 01-31-2013 |
20130039654 | SCHEME FOR REMOTE CONTROL OF THE OUTPUT POWER OF A TRANSMITTER IN A SMART SFP TRANSCEIVER - A scheme is described for remote control of the output power of a transmitter in a smart SFP (or SFP+, or XFP) duplex (or BiDi, or SWBiDi) transceiver in a communication system using an operating system with OAM and PP functions, an OAM, PP & Payload Processor, a transceiver, an optical power meter (optional), a BERT, and an optical link in the field. | 02-14-2013 |
20130343753 | METHODS AND SYSTEMS FOR IMPLEMENTING TIME-DIVISION DUPLEXING IN THE PHYSICAL LAYER - A physical-layer device includes a first sublayer to receive a first continuous bitstream from a media-independent interface and to provide a second continuous bitstream to the media-independent interface. The physical-layer device also includes a second sublayer to transmit first signals corresponding to the first continuous bitstream onto an external link during a first plurality of time windows and to receive second signals corresponding to the second continuous bitstream from the external link during a second plurality of time windows. The second plurality of time windows is distinct from the first plurality of time windows. | 12-26-2013 |
20140178064 | SIGNAL TRANSMISSION DEVICE, RECEIVING CIRCUIT, AND ELECTRONIC APPARATUS - There is provided a signal transmission device including reception processing units for respective channels, so as to enable multichannel transmission by dividing frequency bands. The total number of channels is equal to or greater than three. When full-duplex two-way communication is applied in any combination of two channels, one of reception processing unit include a signal suppressing unit configured to suppress a signal component of a channel other than a self channel. | 06-26-2014 |
20140219652 | Compact Small Form-Factor Pluggable Transceiver - An apparatus, in accordance with particular embodiments, includes an interface configured to establish connections within a copper network. The apparatus also includes a receptacle configured to receive a conventional small form-factor pluggable (SFP) module or a compact SFP module and to direct the SFP modules to a first connector. The first connector connects either of the SFP modules to the node. A pin of the first connector is configured to receive a module detection signal and to transmit data to the compact SFP module. The apparatus also includes a low pass filter coupled to the pin of the first connector that passes the module detection signal to the node. The apparatus is further configured to establish two duplex connections with an optical fiber network if the compact SFP module is connected and to establish one duplex connection with the optical fiber network if the conventional SFP module is connected. | 08-07-2014 |
20140270758 | OPTICAL COMMUNICATION APPARATUS AND PCB INCLUDING OPTICAL INTERFACE FOR REALIZING CONCURRENT READ AND WRITE OPERATIONS - An optical communication apparatus and printed circuit board (PCB), which include an optical interface for realizing concurrent read and write operations, and a data processing system including a memory module and the PCB are provided. The optical communication apparatus includes an optical interface unit configured to output optical signal of first data and receive optical signal of second data simultaneously, and an optical bus configured to transmit the optical signals between the first optical interface unit and a second optical interface unit, the second optical interface unit being configured to receive the optical signal of the first data and output the optical signal of the second data simultaneously. The optical signal of the first data and the optical signal of the second data have polarizations, respectively, orthogonal to each other. | 09-18-2014 |
20150055949 | NODE INTERCONNECT ARCHITECTURE TO IMPLEMENT HIGH-PERFORMANCE SUPERCOMPUTER - Node interconnect architectures to implement a high performance supercomputer are provided. For example, a node interconnect architecture for connecting a multitude of nodes (or processors) of a supercomputer is implemented using an all-to-all electrical and optical connection network which provides two independent communication paths between any two processors of the supercomputer, wherein a communication path includes at most two electrical links and one optical link. | 02-26-2015 |
20150372871 | Resource Management Method and System in Photoelectric Hybrid System - A method and system for managing resources in a photoelectric hybrid system are disclosed. The method includes: for a Coaxial Network Unit (CNU) operating in a half-duplex operating mode, an Optical Line Terminal (OLT) managing uplink bandwidth resources of the CNU according to uplink bandwidth information of the CNU and an ONU; and the OLT and an OCU together managing downlink bandwidth resources of the CNU. | 12-24-2015 |
398042000 | Wavelength division | 6 |
20090052893 | Optical Transmission System - An optical transmission system comprises a metropolitan core network operated in a wavelength division multiplexing mode and connected via metro connection devices to access connections to optical network terminals connected by means of a passive optical splitter. The metro connection devices contain regenerators and wavelength converters, so that data regeneration takes place between the network terminals and the central management and switching unit. This makes it possible to cover distances around 100 km. | 02-26-2009 |
20100104279 | METHOD AND SYSTEM FOR CONFIGURING A CONNECTION-ORIENTED PACKET NETWORK OVER A WAVELENGTH DIVISION MULTIPLEXED OPTICAL NETWORK - A network planning tool and method for configuring a connection-oriented packet network over a WDM optical network without an optical control layer, such as a SONET/SDH layer. The optical network includes a plurality of optical fibers interconnected through nodes and the connection-oriented packet network, such an Ethernet network, MPLS network, or pseudowire network, includes two or more terminal devices. The method and tool function by building an association between the components of the physical layer, such as the optical fiber, and their geographic location or path. The connection-oriented packet network is configured by building multi-link trunks (MLTs) between terminal devices, where the MLTs are built by aggregating lightpaths that traverse distinctive geographic paths. The MLTs are planned and configured through aggregating lightpaths that traverse incongruent sets of photonic elements. A predetermined target for resiliency to physical failure events may determine the degree of congruence allowed between the sets of photonic elements associated with lightpaths in the same MLT. | 04-29-2010 |
20110008042 | Cell phone/internet communication system for RF isolated areas - A communication system for providing downlink and uplink communication between Service Providers, and users located in RF remotely located isolated areas, includes the sequential series connection of Service Provider signal sectors to Radio Interface Modules (RIM's), Service Combiner Units (SCU's), Fiber Transceiver Units (FTU's), Optical Multiplexer Units (OMU's), and Remote Fiber Nodes (RFN's), with only the RFN's being located in the RF isolated areas. The RIM's provide level control of RF signals bidirectional flowing between the Service Providers and SCU's. The SCU's both multiplex and split received downlink RF signals for inputting to the FTU's, and also combine and split RF uplink signals received from the FTU's for feed to the RIM's. The FTU's convert downlink RF signals into optical signals, and split the optical signals for connection to the OMU's. The FTU's also convert uplink optical signals received from the OMU's into uplink RF signals for connection to the SCU's. The OMU's combine downlink optical signals received from the FTU's for inputting into the RFN's, and demultiplex uplink optical signals received from the RFN's for connection to the FTU's. The RFN's convert downlink optical signals into RF signals, and amplify and feed these signals into an antenna system. The RFN's also receive RF uplink signals from devices of users in RF isolated areas, and converts the RF uplink signals into optical uplink signals for connection to the OMU's. | 01-13-2011 |
20110052189 | OPTICAL DEVICE FOR REARRANGING WAVELENGTH CHANNELS - An optical device for rearranging wavelength channels in an optical network is disclosed. The optical device has a wavelength selective coupler having one input port and a plurality of output ports coupled to a plurality of input ports of an optical grating demultiplexor such as an arrayed waveguide grating. The wavelength channels in each of the input ports are dispersed by the demultiplexor and are directed to a plurality of output ports of the optical grating demultiplexor. As a result, at least one wavelength channel at each of the input ports of the optical grating demultiplexor is coupled into a common output port. The optical device is useful in passive optical networks wherein a same demultiplexor is used for simultaneous multiplexing and demultiplexing of wavelength channels. | 03-03-2011 |
20120315035 | CELL PHONE/INTERNET COMMUNICATION SYSTEM FOR RF ISOLATED AREAS - A communication system for providing downlink and uplink communication between Service Providers, and users located in RF remotely located isolated areas, includes the sequential series connection of Service Provider signal sectors to Radio Interface Modules (RIM's), Service Combiner Units (SCU's), Fiber Transceiver Units (FTU's), Optical Multiplexer Units (OMU's), and Remote Fiber Nodes (RFN's), with only the RFN's being located in the RF isolated areas. | 12-13-2012 |
20140328590 | OPTICAL TRANSCEIVER - An optical transceiver ( | 11-06-2014 |