Entries |
Document | Title | Date |
20080253771 | Method and apparatus for configuring Optical Network Terminals (ONT) in a network - A method and system allowing a network operator to change services on a large group of Optical Network Terminals (ONTs) at one time through the use of profiles. At least one profile is configured, and at least one of the profiles is associated with at least one Optical Network Terminal (ONT) having a number of ports. A configuration for the ONTs is generated based on the profiles and, upon a request by an ONT, the configuration is forwarded to the requesting ONT. The method and system may include a graphical user interface (GUI) for entering information used in configuring the profiles, and may assign the profiles to multiple ONTs. Further, the GUI may automatically gather and provide statistics relating to the ONTs to the network operator. Additionally, in a Session Initiation Protocol (SIP) network, the method and system may communicate with the ONTs without using a SIP protocol stack. | 10-16-2008 |
20080273878 | METHOD, SYSTEM AND OPTICAL NETWORK TERMINAL FOR MAPPING A SERVICE FLOW INTO A SERVICE TRANSMISSION CHANNEL - A method for mapping a service flow to a service transmission channel includes: configuring determined configuration parameters for a message characteristic into an Optical Network Terminal (ONT); the ONT ensures that the received service flow matches the configured message characteristic; mapping the service flow to a specified service transmission channel. A system and an ONT for mapping the service flow to the service transmission channel are also provided, and the system sets a general service flow mapping module in the ONT. Service flows may be mapped to different service transmission channels based on any predetermined message characteristic by the method, system, and ONT of this invention and it meets the demand of the subdivision service QoS. | 11-06-2008 |
20090016721 | Method and apparatus for enhanced power diagnostics - Example embodiments of the invention provide a system for monitoring a battery backup unit (BBU) deployed in a network. The BBU typically communicates in a unidirectional manner with an external device, such as an Optical Network Terminal (ONT), is able to communicate in a bidirectional manner. The useful improvements of communicating in a bidirectional manner include installation integrity, real-time troubleshooting, and software upgrades. Moreover, the BBU is able to monitor an output power or status information of a primary power source, such as an Optical Network Terminal (ONT) Power Supply Unit (OPSU). Specifically, example embodiments allow the BBU to be enabled in an event of a loss of primary power to the ONT. The BBU may communicate in a bidirectional manner between the BBU and the device external from the BBU to receive status request signals and provide information responsive thereto about the BBU, including information about the battery. | 01-15-2009 |
20090041460 | Method and apparatus to provide bonded optical network devices - An apparatus and corresponding method for a bonded Optical Network Terminals (ONT) enhances throughput, redundancy and user-port flexibility by Passive Optical Network (PON) services, such as Gigabit-capable (GPON), Broadband PON (BPON), Ethernet PON (EPON) and future PON services, by mechanically or logically externally managing a plurality of individual ONTs as a single bonded ONT while maintaining individual internal management. Further, multiple OLTs may communicate with the same ONT, thereby increasing throughput and providing redundancy. For manufacturers, user-port flexibility reduces time-to-market for unique products to meet specific user needs. That is, different applications may require multiple ONTs to be managed as a single device, yet provide the port counts from various ONTs. For service providers, mechanical or logical combination(s) of ONTs allows management from a user perspective, providing an opportunity for servicing a single device, improving accounting, billing, inventory, etc. | 02-12-2009 |
20090067840 | Method of providing multi-staged IP filters in a point-to-multipoint environment - Various service providers have different architectures to deliver Internet Protocol Television (IPTV) to their subscribers. Some service providers equipment is based on layer 2 IPTV protocol, and other equipment is based on layer 3 IPTV protocol. Within a Passive Optical Network (PON) environment, there may be multiple service providers that employ different delivery techniques to Optical Network Terminals (ONTs). Example embodiments of the invention accommodate these different delivery mechanisms by supporting layer 2 and layer 3 delivery by dynamically configuring traffic filters as a function of a layer and content of an upstream traffic request. | 03-12-2009 |
20090196611 | Method and system for providing a return path for signals generated by legacy terminals in an optical network - A return path system includes inserting RF packets between regular upstream data packets, where the data packets are generated by communication devices such as a computer or internet telephone. The RF packets can be derived from analog RF signals that are produced by legacy video service terminals. In this way, the present invention can provide an RF return path for legacy terminals that shares a return path for regular data packets in an optical network architecture. | 08-06-2009 |
20090202244 | Bidirectional optical transceiver module using a single optical fiber cable - Present invention is related to optical transceiver module using optical fiber cable and the detail is related to optical transceiver module transforming bi-directional transmission by single fiber cable using two different wavelength lights. Optical module is formed by modularized light emitting device, light receiving device, filter and lens and their optical alignment is accomplished by connecting them. In order to make accurate alignment, transmitter module with light emitting device included and receiver module with light receiving device included are connected to lens module by guide hole and guide pin molded by machined precisely. Lens module includes lens shape part to make light focusing effectively. | 08-13-2009 |
20090208211 | Optical communications network and intensity adjustment method for optical communications network - An optical communications network in which one optical line terminal is connected to multiple optical network units and in which code division multiplexing communication is carried out between the optical line terminal and the optical network units. The optical intensities of upstream optical signals transmitted from each optical network unit are made constant at the time of multiplexing by an optical directional coupler, and the optical intensity of a downstream optical signal received by an optical network unit and an upstream optical signal received by the optical line terminal is contained within a dynamic range. Each optical network unit is provided with a variable optical attenuator that is common for an upstream optical signal and a downstream optical signal. The upstream optical signal and the downstream optical signal are attenuated by an equal attenuation. Moreover, the optical line terminal controls the attenuation at the variable optical attenuator. | 08-20-2009 |
20090263133 | OPTICAL COMMUNICATION NETWORK SYSTEM, PARENT STATION OPTICAL COMMUNICATION DEVICE, AND CHILD STATION OPTICAL COMMUNICATION DEVICE - In a downstream channel communication, an individual downstream channel wavelength is allocated to each group of user nodes, and for user nodes in a same group, a central office performs a downstream-signal communication by a same communication method using the individual downstream channel wavelength. In an upstream channel communication, all user nodes perform an upstream-signal communication with the central office using a single upstream channel. A downstream signal from the central office is distributed to the groups for each individual downstream channel wavelength, and upstream signals from the user nodes are transmitted to the central office in a multiplexing manner. | 10-22-2009 |
20090279892 | OPTICAL NETWORK DEVICE GENERATING MULTI-CHANNEL - Disclosed herein is an optical network device for generating a multi-channel. The optical network device is connected to a plurality of sectors. Each of the sectors has one or more subscriber terminals as component members, divides a frequency band assigned to a wired network, and provides resulting frequency bands to respective subscriber terminals. The optical network device includes one or more channel cards, and a media converter. The channel cards are mounted on a motherboard having a bus, and allow a frequency band, assigned to any one of the sectors, to be reused for at least one remaining sector in such a way as to provide an identical frequency band to the sectors at a node where the sectors branch off, thus generating a multi-channel for the frequency band. The media converter converts signals between an optical network and the motherboard. | 11-12-2009 |
20090304387 | OPTICAL DATA NETWORK FOR BILATERAL COMMUNICATION BETWEEN A PLURALITY OF COMMUNICATION NODES - A fiber optic bidirectional communications network includes a plurality of decentralized communication nodes each including a receiver for receiving electromagnetic radiation at a wavelength λ | 12-10-2009 |
20090317082 | Passive Optical Network System, Optical Network Unit, and Optical Line Terminal - An optical line terminal (OLT), an optical network unit (ONT) and a passive optical network (PON) system are provided. A user of the ONU or a terminal connected with the ONU can accurately recognize the amount of a bandwidth allocated to the ONU without estimating the communication bandwidth. The OLT notifies each ONU of the amount of the bandwidth allocated to the ONU in response to a request transmitted from the ONU to the OLT. Each ONU receives bandwidth information from the OLT and displays thereon the bandwidth information or notifies the terminal connected with the ONU of the bandwidth information. | 12-24-2009 |
20100003030 | OPTIMISATION OF PASSIVE OPTICAL NETWORKS - The present invention relates to communications network design, and in particular the use of passive optical networks (PONs) for optimising an existing large network infrastructure such as a backhaul network. The present invention provides a computer implemented method of designing a PON based network, the method comprising: receiving data representing a plurality of network nodes having cable interconnection routes; determining a combination of core nodes from the network nodes, the core nodes being selected by allocating a combined cost to a series of core node combinations and selecting the lowest combined cost core node combination, the combined cost of each core node combination comprising a cost allocated for each of a number of core node selection criteria; allocating a number of network nodes to each core node in the selected core node combination; for each core node in the selected core node combination, determining a combination of PONS having respective cable interconnection routes for servicing the respective allocated nodes from the core node, the PONS being selected by allocating a combined cost to a series of PON combinations and selecting the lowest combined cost PON combination, the combined cost of each PON combination comprising a cost allocated to each PON within the respective combination for each of a number of PON selection criteria; and outputting data representing each of the lowest cost PON combinations. | 01-07-2010 |
20100054739 | METHOD FOR COORDINATING AN UPLINK TDMA ACCESS SHARED BY SEVERAL SUB-NETWORKS OF A PASSIVE OPTICAL NETWORK (PON) - A Passive Optical Network (PON) comprises at least a first sub-network ( | 03-04-2010 |
20100067910 | 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 correspondence between a multicast group identifier and an address of a user terminal participating in a multicast group. When the ONU receives a request message of participation in the multicast group from the user terminal, the ONU registers the correspondence between the multicast group identifier indicated by the received message and the user terminal address. A new received message is deleted without being sent to the OLT if another user terminal address is registered already, along with a correspondence with the same multicast group identifier, in the multicast group management table. | 03-18-2010 |
20100080559 | Synchronized code division multiplexing communication method and synchronized code division multiplexing communication system - A synchronized CDM communication system performs 1-to-N communication by CDM between a central office and first to N-th optical network units (ONU). The synchronized CDM communication system adds structural elements for realizing a connection state acquisition section to a conventional synchronized CDM communication system. A central office includes a presence check section, a ranging processing section and the connection state acquisition section. The presence check section checks the ONUs that are connected with the central office and the ONUs that are not connected. The ranging processing section performs transmission timing adjustments for the ONUs that are connected. The connection state acquisition section verifies whether all of ONUs are connected with the central office, and performs a discovery of a ONU, among the ONUs that were not connected at the time of the check, that has resumed participation in communication since the check ended. | 04-01-2010 |
20100104287 | RETURN PATH FOR USPSTREAM COMMUNICATIONS ORIGINATING FROM OPTICAL NODE - This disclosure describes techniques for providing a communication path for upstream communications originating from a node of an optical network. In particular, methods and devices are described for combining upstream communications originating from the node of the optical network with upstream communications originating from subscriber devices coupled to the node. The upstream communication originating from the node may, for example, include status information about the node. The upstream communication, which may include status information about the node, essentially piggy-backs onto upstream communication originating from the subscriber devices coupled to the node. | 04-29-2010 |
20100104288 | METHOD, APPARATUS AND SYSTEM FOR BEARING IP PACKETS OVER PASSIVE OPTICAL NETWORK - A method, apparatus and system for bearing Internet Protocol (IP) packets over a Passive Optical Network (PON) are disclosed. The method includes obtaining an IP packet, converting the IP packet into a Gigabit PON Encapsulation Method (GEM) frame. The method further includes performing a Gigabit PON Transmission Convergence (GTC) framing on the GEM frame to obtain a GTC frame and performing a PON physical layer processing on the GTC frame. | 04-29-2010 |
20100111532 | METHOD, SYSTEM AND DEVICE FOR REALIZING DATA TRANSMISSION EXTENSION IN PASSIVE OPTICAL NETWORK - A method, a device, and a system for realizing data transmission extension in a passive optical network (PON) are provided. Between a burst-mode clock and data recovery (BCDR) module and an electrical-optical (E/O) amplification module, the device includes a delimiter matching module and a preamble buffering and compensating module. The delimiter matching module is adapted to receive a data frame sent by the BCDR module and determine a location of a delimiter in the data frame. An optical-electrical (O/E) amplification module performs O/E conversion, amplification, and shaping on the data frame. The BCDR module then performs clock and data recovery processing on the data frame. The preamble buffering and compensating module is adapted to receive and buffer the data frame output from the delimiter matching module, insert a compensation preamble in the data frame according to the location of the delimiter in the data frame determined by the delimiter matching module, and send the data frame to the E/O amplification module according to a retiming clock of a downstream direction. Therefore, the data transmission extension is realized in an optical-electrical-optical (OEO) manner. | 05-06-2010 |
20100183305 | OPTICAL COMMUNICATION USING COUPLED OPTICALLY PUMPED AMPLIFIERS - Coupling of optically pumped amplifiers between two nodes of an optical communications system. Optical pump power from one direction of the bi-direction communication is diverted to power optically pumped amplifiers in the opposite direction of the bi-directional communication. The optical link in the optical communications system may include both forward and backward Raman amplifiers, as well as forward and backward optically (for example, remote optically) pumped amplifiers for any given optical communication direction. Such coupling has the potential to increase reliability and/or efficiency of the optical communications system. | 07-22-2010 |
20100189439 | OPTICAL FIBER DISTRIBUTED WIRELESS PERSONAL AREA NETWORK - A Wireless Personal Area Network that provides multiple users with multi-gigabit-per-second data rate wireless connectivity and is integrated with an optical fiber distribution network is disclosed. Embodiments relate generally to an integrated fiber optic WPAN architecture that comprises multiple 57-66 GHz remotely located wireless access points interconnected with a centrally located distribution point using optical fiber links. The integrated network provides an efficient, flexible and scalable 57-66 GHz WPAN architecture since the fiber optic links accommodate the delivery of bandwidth intensive services to large numbers of users while seamlessly supporting the diversity of multi-gigabit-per-second data applications. Two approaches for the transport of the WPAN signals over the optical fiber signal distribution network are described. One technique for interconnecting the remote radio access points in the fiber distributed 57-66 GHz WPAN is via an optical fiber network which can transport the wireless signals over the fiber as ‘analog over fiber’. An alternative ‘digital over fiber’ signal transport scheme for the fiber distributed 57-66 GHz WPAN is also described which supports the transport of the multi-gigabit-per-second WPAN digital data streams over fiber. | 07-29-2010 |
20100209108 | REFLECTIVE SEMICONDUCTOR OPTICAL AMPLIFIER (RSOA), RSOA MODULE HAVING THE SAME, AND PASSIVE OPTICAL NETWORK USING THE SAME - A Reflective Semiconductor Optical Amplifier (RSOA) for compensating for light loss in an optical link, an RSOA module for improving polarization dependency using the RSOA, and a Passive Optical Network (PON) for increasing economical efficiency and practical use of a bandwidth using the RSOA are provided. The PON includes a central office comprising a plurality of optic sources transmitting a downstream signal and a plurality of first receivers receiving an upstream signal; at least one optical network terminal (ONT) including a second receiver receiving the downstream signal and an RSOA which receives the downstream signal, remodulates the downstream signal into the upstream signal, and transmits the upstream signal in loopback mode; and a remote node interfacing the central office with the ONT. The upstream signal and the downstream signal are transmitted between the remote node and the ONT via a single optical fiber. The remote node includes an optical power splitter at its port connected to the ONT. | 08-19-2010 |
20100215368 | SINGLE WAVELENGTH SOURCE-FREE OFDMA-PON COMMUNICATION SYSTEMS AND METHODS - Methods and systems for processing communication signals in an Orthogonal Frequency Division Multiple Access (OFDMA)-Passive Optical Network (PON) are disclosed. An optical carrier at a wavelength generated at an optical line terminal (OLT) may be reused by optical network units (ONUs) in the network for upstream transmission of data signals to the OLT. In addition, each ONU may perform carrier suppression to avoid broadband beating noise resulting from the simultaneous transmission of upstream data signals on the same wavelength. Further, the optical source at the OLT used to generate the optical carrier may be reused as a local oscillator for coherent detection of received upstream signals to minimize any frequency offsets. | 08-26-2010 |
20100215369 | Upgraded Bandwidth Map for Ten Gigabit Passive Optical Network - An apparatus comprising an optical line terminal (OLT) configured to transmit a bandwidth map (BWmap) for a plurality of burst signals to be transmitted by a plurality of optical network units (ONUs), wherein the BWmap comprises a plurality of allocations, and wherein each allocation comprises a start time for the allocation, a grant size for the allocation, and a header error correction (HEC) for the allocation. | 08-26-2010 |
20100221007 | 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 perform communication individually. With respect to signals in the downstream direction, each of the OLTs includes a transmitter to transmit the first wavelength and plural transmitters to transmit the second wavelengths used for the individual communication with the respective ONUs. Each of the ONUs includes a receiver to receive the first wavelength and a receiver to receive the second wavelength used in the ONU itself. The OLT transmits data of the IP broadcast by the first wavelength and transmits individual data of each of the ONUs by the second wavelength corresponding to the ONU. | 09-02-2010 |
20100272440 | 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 of single rate devices (OLT and ONU) functionally connected to provide the double rate capability. The methods include packet-by-packet multiplexing, bit-by-bit line code interleaving, doubling an inter-packet gap (IPG) length, defining windows of transmission for different transmission rates, using the 8B/10B code, removing the 8B/10B code from just the downlink transmission and symbol-by-symbol multiplexing is downlink transmissions from the double rate OLT. | 10-28-2010 |
20100278534 | PEER-TO-PEER VOICE OVER INTERNET PROTOCOL - An optical network terminal receives, from a user device associated with the optical network terminal, a call to a called party, and checks a table, which may be locally cached in the optical network terminal, for a network location of another optical network terminal associated with the called party. The device also establishes a connection with another user device associated with the other optical network terminal, based on the network location, and exchanges voice data with the other user device associated with the other optical network terminal via the connection. | 11-04-2010 |
20110002690 | PON ONU configured in the form of a Gigabit Interface Converter (GBIC) - A Passive Optical Network (PON) component, such as a Gigabit Interface Converter (GBIC) or similar pluggable transceiver, provides the combined functionality of the GBIC (or similar device) and an Optical Network Unit (ONU). The result is a device with a reduced form factor by eliminating redundant components and simplified fault management of the end-system. | 01-06-2011 |
20110110664 | METHOD, DEVICE AND SYSTEM FOR MANAGING INFORMATION OF AN OPTICAL NODE IN AN OPTICAL DISTRIBUTION NETWORK - The present invention discloses a method, device and system for managing information of an optical node in an optical distribution network, relates to management of information of an optical node in an optical distribution network, is capable of solving the problem of manual entry of information of an optical node being cumbersome, and is not limited by installation locations of the optical node. The method for managing information of an optical node in an optical distribution network includes: obtaining an identity code of an optical node; querying a pre-established optical node information table according to the identity code of the optical node, wherein the optical node information table comprises the identity code of the optical node and the installation location information of the optical node. The present invention is suitable for management of information of an optical node in an optical distribution network. | 05-12-2011 |
20110182583 | DISTRIBUTED CABLE MODEM TERMINATION SYSTEM - Distributed CMTS device for a HFC CATV network serving multiple neighborhoods by multiple individual cables, in which the QAM modulators that provide data for the individual cables are divided between QAM modulators located at the cable plant, and remote QAM modulators ideally located at the fiber nodes. A basic set of CATV QAM data waveforms may be transmitted to the nodes using a first fiber, and a second set of IP/on-demand data may be transmitted to the nodes using an alternate fiber or alternate fiber frequency, and optionally other protocols such as Ethernet protocols. The nodes will extract the data specific to each neighborhood and inject this data into unused QAM channels, thus achieving improved data transmission rates through finer granularity. A computerized “virtual shelf” control system for this system is also disclosed. The system has high backward compatibility, and can be configured to mimic a conventional cable plant CMTS. | 07-28-2011 |
20110200333 | METHOD AND APPARATUS FOR BIDIRECTIONAL OPTICAL LINK USING A SINGLE OPTICAL CARRIER AND COLORLESS DEMODULATION AND DETECTION OF OPTICAL FREQUENCY SHIFT KEYED DATA - A method for enabling bidirectional data communication using a single optical carrier and a single laser source with the aid of an integrated, colorless demodulator and detector for frequency modulated signals, and a reflective modulator. A receiving optical system holds a technique for demodulation and detection of optical frequency modulated signals, enabling remodulation of the incoming signal to establish bidirectional communication with the transmitting optical system, without introducing a high penalty. A colorless demodulator and detector, which provides the functionality of a periodic filtering device for demodulation of the downstream, and also detection capability. The principle of operation of the CDD relies on the introduction of a comb transfer function with the help of a Semiconductor Optical Amplifier, by providing a reflected feedback signal to the CDD's active element. This periodic transfer function is obtained by an optical cavity and allows for wavelength-independent operation on a given wavelength grid. | 08-18-2011 |
20110211837 | Method of Recovery From Sleep State of an Onu in a Pon System Capable of Power Saving - There is a need to recover an ONU from a sleep state for communication with the PON before a specified sleep cancel time in a short period of time without degrading the band use efficiency. An OLT manages an electric state of each ONU connected to a PON. When at least one ONU is in sleep mode, the OLT transmits a grant to allocate a band for a sleep cancel report to the ONU. When the sleep-mode ONU requires communication, the ONU transmits the sleep cancel report to the OLT using the band for the sleep cancel report. When receiving the sleep cancel report, the OLT changes the managed ONU to a normal state and resumes the communication with the PON. | 09-01-2011 |
20110217044 | VISIBLE LIGHT MULTIPLEX COMMUNICATION SYSTEM - A visible light multiplex communication system, and more particularly, a visible light multiplex communication system in which identification (ID) information and data information can be simultaneously transmitted and received to and from a server and a plurality of clients by using visible light, is disclosed. Visible light communication can be smoothly performed in a state where visible light ID communication and visible light data communication do not interfere with each other in the same space. In addition, data can be efficiently transmitted and received to and from a plurality of ID clients and a plurality of data clients by using visible light. In addition, visible light ID communication and visible light data communication can be efficiently performed in a state where interference between a plurality of clients using different protocols does not occur in the same place. Furthermore, a specific unit that is capable of efficiently transmitting and receiving data to and from a plurality of clients by using visible light can be provided. | 09-08-2011 |
20110236021 | Passive Optical Networks - A passive optical network system, a line coding method and an optical network unit are described. The optical network unit comprises a downlink optical receiver configured to receive a first portion of a downstream data signal, and an uplink optical remodulator configured to receive a second portion of the downstream data signal and remodulate it to generate a return-to-zero line coded upstream data signal. The downstream data signal may be inverse-return-to-zero line coded. | 09-29-2011 |
20110268444 | Passive Optical Network System - A system for providing bi-directional RF services over a point-to-multipoint Passive Optical Network (PON). A system that can transport upstream RF signals generated by devices such as a set top box or a cable modem, through a passive Optical Network while simultaneously supporting downstream RF video and bi-directional base-band services on the PON. | 11-03-2011 |
20110280577 | Optical power distribution device and method - A network for delivering optical power over an optical conduit includes at least one optical power source delivering optical power to multiple outlet power subsystems the subsystem managing demands for power from the multiple outlet sinks. | 11-17-2011 |
20110280578 | PASSIVE OPTICAL NETWORK, ACCESS METHOD THEREOF, OPTICAL NETWORK UNIT AND OPTICAL LINE TERMINATION - A method for accessing a Passive Optical Network (PON) is disclosed. The method includes: obtaining a first distance parameter of an Optical Network Unit (ONU), where the first distance parameter indicates the location of the ONU relative to an Optical Line Termination (OLT); receiving an ONU information request message delivered by the OLT, and returning an ONU information response message to the OLT when a second distance parameter carried in the ONU information request message corresponds to the first distance parameter; and receiving a ranging request message, where the ranging request message is delivered by the OLT according to the ONU information response message, returning a ranging response message as a basis for the OLT to obtain an Equalization Delay (EQD) value of the ONU, and connecting the ONU to the PON according to the EQD value. An ONU, an OLT, and a PON are also disclosed. The embodiments of the present invention enable the ONUs located at different distances from a same PON port to access the PON in lossless mode, thereby making full use of port resources and ensuring efficient running of devices. | 11-17-2011 |
20110293278 | DYNAMIC INTELLIGENT BIDIRECTIONAL OPTICAL AND WIRELESS ACCESS COMMUNICATION SYSTEM - According to one embodiment of the present invention, a wavelength-shifted dynamic intelligent bidirectional access optical system utilizes key optical elements such as: a quantum dot enabled semiconductor optical amplifier, a phase modulator and an intensity modulator to provide upstream optical signals. These key optical elements reduce the Rayleigh backscattering effect on the transmission of optical signals. Reduced Rayleigh backscattering effect enables a longer-reach access network topology (more than any other current access network topology) between a subscriber unit and a super node (e.g., many local nodes collapsed into one super node). Such a longer-reach access network topology eliminates operational costs and capital costs related to a vast array of middle equipment such as routers and switches, which would otherwise be needed between super nodes and many remote nodes. Furthermore, a wavelength to a subscriber unit may be protected and dynamically varied for on-Demand bandwidth, information and services and also a subscriber's unit may be configured with any array of connectivity options. Integrated micro-processors, wireless devices, wireless sensors, RFID sensors, and batteries incorporated into an intelligent device may be used to sense the environment, to process information, to initiate action and to communicate with other similar devices. Data interpretation, pattern recognition and reasoning technologies may be utilized to allow these devices to communicate with and/or without human intervention and to operate independently and intelligently. Such independent interactions with other similar devices (integrated with micro-processors, wireless devices, wireless sensors, RFID sensors and batteries) can enable the Internet of Things and/or machine-to-machine communication via an embedded algorithm/software. Such an intelligent device can also act as the remote-control for life and health. | 12-01-2011 |
20110318009 | PON SYSTEM, OPTICAL NETWORK UNIT USED THEREIN, AND TRANSMISSION CONTROL METHOD THEREFOR - An object of the present invention is to improve the accuracy of bandwidth control by an optical line terminal | 12-29-2011 |
20120008954 | RECEIVING UNIT, OPTICAL LINE TERMINAL, AND FREQUENCY CALIBRATION METHOD FOR CLOCK AND DATA RECOVERY CIRCUIT - In the present invention, a receiving unit using a voltage-controlled oscillator, and the like are allowed to compensate for the frequency characteristics of the voltage-controlled oscillator resulting from temperature change, without adding a capacitive element for temperature compensation. A receiving unit and an optical line terminal of the present invention include a clock and data recovery circuit | 01-12-2012 |
20120106964 | Novel RFoG CPE device offering enhanced services overlay - A method includes: receiving a downstream optical signal propagating away from a head end; dividing the downstream optical signal into a downstream high portion and a downstream low portion; diplexing the downstream low portion with an upstream low portion; combining the upstream low portion and an upstream high portion; and transmitting the combined upstream portions as an upstream optical signal propagating toward a head end. An apparatus includes: an optical receiver; an optical divider coupled to the optical receiver; an optical diplexer coupled to the optical divider; an optical combiner coupled to the optical diplexer; and an optical transmitter coupled to the optical combiner. | 05-03-2012 |
20120128359 | METHOD AND SYSTEM FOR BIDIRECTIONAL OPTICAL COMMUNICATION - A method for bidirectional optical communication comprising the steps of:—at a first optical line terminal, directly modulating a laser source to generate a downstream optical signal which has an optical power spectrum comprising two peaks having a frequency separation and a non zero power difference at generation;—propagating said downstream optical signal at a distance along an optical line comprising at least a first optical fiber propagating said downstream optical signal to a second optical line terminal;—at the second optical line terminal: power splitting said downstream optical signal to generate a first and a second power portion of said downstream optical signal, spatially separated; passive filtering said first power portion of said downstream optical signal so as to increase in absolute value a respective power difference of said two peaks, so as to obtain a filtered optical signal which is thereafter detected; and amplitude modulating the second power portion of the downstream optical signal so as to obtain an upstream optical signal having a second amplitude modulation;—propagating back along said optical line the upstream optical signal to the first optical line terminal;—at said first optical line terminal, detecting said upstream optical signal; wherein the method further comprises the step of passive filtering said downstream optical signal and/or said second power portion of the downstream optical signal and/or said upstream optical signal, so as to lower, in absolute value, a respective non zero power difference of said two peaks. | 05-24-2012 |
20120148250 | Wavelength Division Multiplexing Filter - The present invention discloses a Wavelength Division Multiplexing Filter which can satisfy coexistence requirements of different PON systems and an optical line detecting system. The Wavelength Division Multiplexing Filter comprises a plurality of filters that are configured: in a downlink direction, to receive a first optical pulse signal output by a first PON system, a second optical pulse signal output by a second PON system or gained by coupling an output signal of the second PON system and a video signal, and a third optical pulse signal sent from an Optical Time Domain Reflectometer, and to couple the first optical pulse signal, the second optical pulse signal and the third optical pulse signal into an Optical Division Network; and in an uplink direction, to split an uplink optical pulse signal according to wavelength bands, to transmit an optical pulse signal in a first uplink wavelength range to the first PON system, to transmit an optical pulse signal in a second uplink wavelength range to the second PON system, and to transmit an optical signal in a third uplink wavelength range to the Optical Time Domain Reflectometer. | 06-14-2012 |
20120163818 | PASSIVE OPTICAL NETWORK APPARATUS FOR TRANSMITTING OPTICAL SIGNAL - Disclosed herein are a remote node and a telephone station terminal in a passive optical network (PON). The remote node includes an optical circulator that transmits downlink signals input from a downlink optical backbone network to a wavelength distributor and transmits uplink signals input from the wavelength distributor to an uplink optical backbone network different from a downlink optical backbone network; and a wavelength distributor that distributes the downlink signal input from the optical circulator into a plurality of wavelengths to be connected to an optical distribution network and connects the uplink signals input from the optical distribution network to the optical circulator. | 06-28-2012 |
20120294613 | METHOD FOR ONU REGISTRATION IN A PASSIVE OPTICAL NETWORK - Embodiments of the invention include a system for registering an optical network unit (ONU) installed in a passive optical network (PON), including a mobile terminal, a registration server, and an optical line terminal (OLT). The mobile terminal is configured to collect an ONU identification from the ONU, collect a subscriber identification, and transmit the ONU identification and the subscriber identification to a registration server via a communication system. The registration server is configured to receive the ONU identification and subscriber identification from the mobile terminal via the communication system, retrieve subscriber information from a subscriber database based on the subscriber identification, associate the ONU with the subscriber information, and transmit, to an optical line terminal, an association between the ONU and the subscriber information. The optical line terminal (OLT) is configured to serve as an endpoint for the ONU in the PON. | 11-22-2012 |
20120294614 | Symmetric Coherent OFDMA-PON Configuration with Low-Speed ONU-Side - A method by an optical network unit ONU includes, for downstream transmission, using a first tunable laser for coherent detection on a sub-band basis to increase receiver sensitivity and reduce analog-to-digital conversion ADC and digital signal processor DSP requirements within the ONU, and for upstream transmission, using a second tunable laser and using an optical signal beating between the first and second tunable lasers to generate a tunable radio frequency RF signal source for upstream multi-band OFDMA signal generation thereby avoiding need for an otherwise more costly RF clock source within the ONU, enabling low-speed digital-to-analog conversion DAC operation and rendering the ONU colorless in both optical and radio frequency RF domains. | 11-22-2012 |
20120315046 | PASSIVE OPTICAL NETWORK (PON)-BASED SYSTEM AND METHOD FOR PROVIDING HANDOVER AMONG OPTICAL NETWORK TERMINALS (ONTS) - A Passive Optical Network (PON)-based system and method for providing handover between Optical Network Terminals (ONTs) are provided. The PON-based system may include an Optical Line Terminal (OLT), and an ONT to relay communication between the OLT and a mobile terminal. When the mobile terminal is connected to the ONT, the ONT may transmit a WiFi location update alarm message to the OLT, and the OLT may update a Look-Up Table (LUT) in response to the WiFi location update alarm message. | 12-13-2012 |
20120321315 | SCHEDULING DELIVERY OF UPSTREAM TRAFFIC BASED ON DOWNSTREAM TRAFFIC IN OPTICAL NETWORKS - In general, techniques are described for monitoring downstream traffic in order to schedule delivery of upstream traffic in a computer network. The techniques may be implemented by an optical line terminal (OLT) comprising a control unit and an interface. The control unit determines an amount of upstream data that is waiting at one of a plurality of ONTs to be transmitted upstream to the OLT, and determines an amount of downstream data that is transmitted by the OLT to this ONT. The control unit increases the determined amount of upstream data based on the determined amount of downstream data transmitted by the OLT to the ONTs and, after increasing the determined amount of upstream data, generates an upstream grant map that grants time slots to the ONTs based on the determined amount of upstream data. The interface transmits the upstream grant map downstream to the ONTs. | 12-20-2012 |
20120321316 | REFLECTIVE OPTICAL NETWORKS - A reflective optical network ( | 12-20-2012 |
20120328295 | Optical Fiber Communication System and Methods for Optical Fiber Communication - An optical fiber communication system is provided, including a central office and an optical network unit. The central office generates a first downstream signal and a second downstream signal according to a radio frequency signal and a baseband signal, respectively. The optical network unit is coupled to the central office to receive the first downstream signal and the second downstream signal through a first fiber and a second fiber different from the first fiber, respectively, such that the optical network unit only modulates the second downstream signal to generate an upstream signal and then delivers the upstream signal to the central office through the first fiber, thereby decreasing signal Rayleigh backscatter noise. | 12-27-2012 |
20130034355 | Method and system for realizing power saving mechanism management between optical network unit (ONU) and optical line terminal (OLT) - The disclosure provides a method and system for realizing power saving mechanism management between an Optical Network Unit (ONU) and an Optical Line Terminal (OLT). The method includes: passing power saving information between the ONU and the OLT through an extended Operation Administration and Maintenance (OAM) frame; closing/opening an optical module of the ONU based on the obtained power saving information. With the method of the disclosure, the optical module is closed in time when the optical module of the ONU is not needed, thus reducing power consumption of the ONU, and enabling interaction between the ONU and the OLT to meet the requirement for power saving and emission reduction. | 02-07-2013 |
20130045013 | METHOD FOR PERFORMING NETWORK FUNCTIONS, TELECOMMUNICATION'S ACCESS NETWORK, CENTRAL UNIT, NETWORK-SIDED NETWORK TERMINATION UNIT, AND SUBSCRIBER-SIDED NETWORK ACCESS UNIT - The invention relates to a method for performing network functions for a subscriber-sided (CPE) network access unit (ONT) in a telecommunication's access network with a central unit (CO, OLT), a distribution network (AN), and a multiple of network-sided network termination units (DPD) with subscriber-sided network access units (ONT) connected or connectable thereto, in which network a bidirectional communication path ( | 02-21-2013 |
20130114961 | METHOD AND APPARATUS FOR RAMAN CROSS-TALK MITIGATION - Disclosed are an apparatus and method configured to process video data signals operating on a passive optical network (PON). One example method of operation may include receiving a data signal at an optical distribution network node (ODN) and identifying signal interference in the data signal. The method may also include modifying a shape of the data signal in the electrical domain and transmitting the modified data signal to at least one optical termination unit (ONT). | 05-09-2013 |
20130114962 | COMMUNICATION DEVICE, COMMUNICATION SYSTEM, COMMUNICATION METHOD, AND PROGRAM - The communication device is connected with a plurality of user-side devices via a splitter. The communication device includes a matching means for performing matching to determine whether each of a burst delimiter, positioned at a start position of frame data which is a synchronization target in a burst optical signal transmitted from each of the user-side devices, and sync pattern data, positioned from the beginning of the burst optical signal to the burst delimiter in the burst optical signal, matches a predetermined pattern. The communication device also includes a synchronization means for, if matching of the sync pattern data and matching of the burst delimiter by the matching means succeeded, performing synchronization of the frame data on the basis of the position of the burst delimiter in the burst optical signal. The matching means performs matching of the burst delimiter after successful matching of the sync pattern data. | 05-09-2013 |
20130121699 | PON SYSTEM AND TERMINAL OPERATION REGISTERING METHOD - In a PON system in which communication is performed at a plurality of types of transmission rate (L, M, and H) in an upstream direction from a plurality of terminals connected to a station apparatus through optical fibers, within a discovery period for allowing an unregistered terminal to be recognized by station apparatus, the terminal makes a discovery response at one type of transmission rate (L). With this configuration, station apparatus can wait for a discovery response with a receive function being allowed to support transmission rate (L). | 05-16-2013 |
20130142515 | Apparatus and Method for Registering a Coaxial Network Unit on an Optical Network - A method comprising receiving a coaxial network unit (CNU) registration request from a CNU via a coaxial portion of a network, wherein the registration request is addressed to an optical line terminal (OLT), and forwarding the CNU registration request to the OLT via an optical portion of the network. Included is an OLT comprising a processor configured to receive a registration request including a logical node identifier (LNID) assigned to a coaxial line terminal (CLT) in a payload of the registration request, wherein the CLT intermediates between the OLT via an optical portion of a unified optical-coaxial network and a CNU via an electrical network portion of the unified optical-coaxial network, assign a logical link identifier (LLID) to the CNU, and send the LLID to the CNU via the CLT. | 06-06-2013 |
20130156432 | OPTICAL DOWNLINK SYSTEM - Optical downlink system ( | 06-20-2013 |
20130230325 | OPTICAL NETWORK UNITS (ONUs) FOR HIGH BANDWIDTH CONNECTIVITY, AND RELATED COMPONENTS AND METHODS - Optical network units (ONUs) for high bandwidth connectivity, and related components and methods are disclosed. A fiber optical network ends at an ONU, which may communicate with a subscriber unit wirelessly at an extremely high frequency avoiding the need to bury cable on the property of the subscriber. In one embodiment, an optical network unit (ONU) is provided. The ONU comprises a fiber interface configured to communicate with a fiber network. The ONU further comprises an optical/electrical converter configured to receive optical downlink signals at a first frequency from the fiber network through the fiber interface and convert the optical downlink signals to electrical downlink signals. The ONU further comprises electrical circuitry configured to frequency convert electrical downlink signals to extremely high frequency (EHF) downlink signals at an EHF, and a wireless transceiver configured to transmit the EHF downlink signals to a proximate subscriber unit through an antenna. | 09-05-2013 |
20130230326 | METHOD, SYSTEM, AND RELAY APPARATUS FOR REALIZING PASSIVE OPTICAL NETWORK REACH EXTENSION - Embodiments of the present invention disclose a method and a system for realizing PON reach extension, and a relay apparatus for realizing this method. The method includes: extracting an overhead in an upstream data stream that is sent by an ONU to an OLT, obtaining a payload in the upstream data stream through de-mapping, and storing it into a buffer; extracting bandwidth authorization information in an downstream data stream that is sent by the OLT to the ONU; and reorganizing a stored payload according to the bandwidth authorization information and inserting a corresponding overhead to generate a new upstream data stream and send it to the OLT. | 09-05-2013 |
20130236178 | MULTI-POINT CONTROL PROTOCOL PROXY ARCHITECTURE IN A NETWORK WITH OPTICAL AND COAXIAL DOMAINS - A method of registering a coax network unit (CNU) in a network is performed at an optical-coax unit (OCU). In the method, a first discovery message is broadcasted to a plurality of CNUs. In response, a first registration request is received from a first CNU of the plurality of CNUs. In response to the first registration request, a proxy entity corresponding to the first CNU is implemented in the OCU. A second discovery message is received from an optical line terminal (OLT). In response to the second discovery message, a second registration request is transmitted to the OLT requesting registration of the proxy entity with the OLT. | 09-12-2013 |
20130236179 | PASSIVE OPTICAL NETWORK USER TERMINAL AND METHOD OF POWER SUPPLY CONTROL AND POWER SUPPLY STATE REPORTING FOR THE SAME - The present disclosure discloses a method, wherein the method comprises generating a passive optical network (PON) protocol message, wherein the PON protocol message comprises an identifier of a PON user terminal and an action indication indicating that the PON user terminal intends to exercise a first power supply mode that is a power-saving mode. The present disclosure further provides a method for controlling the PON power supply and for reporting the power supply state. The present disclosure allows control of the energy usage of the PON user terminal to save power when a service in the PON user terminal is not used or when the user terminal uses a backup pow | 09-12-2013 |
20130243435 | Method and Apparatus for Link Sharing Among Multiple EPONS - One embodiment of the present invention provides an optical line terminal (OLT) in an Ethernet passive optical network (EPON). The OLT includes a number of bi-directional optical transceivers. At least one bi-directional optical transceiver is coupled to an optical network unit (ONU) group that includes a number of ONUs. The OLT further includes a first downstream media access control (MAC) interface configured to provide a first downstream control signal and a splitter configured to split the first downstream control signal to a number of sub-signals. At least one sub-signal is configured to control downstream transmission of a corresponding bi-directional optical transceiver to a corresponding ONU-group. | 09-19-2013 |
20130259482 | OPTICAL NETWORK UNIT REGISTRATION METHOD - In a network that includes one or a plurality of optical line terminals, a plurality of branches, and an optical routing unit, the optical network unit registration method includes a first process in which the optical line terminals transmit a discovery gate to the optical network units, and a second process in which, in response to the discovery gate, an unregistered optical network unit transmits a register request to a separate optical line terminal from the terminal that transmitted the discovery gate. A discovery window is provided in the optical line terminal that receives the register request. This optical line terminal receives the register request in the discovery window. | 10-03-2013 |
20130287399 | Upgraded Bandwidth Map for Ten Gigabit Passive Optical Network - An apparatus comprising an optical line terminal (OLT) configured to transmit a bandwidth map (BWmap) for a plurality of burst signals to be transmitted by a plurality of optical network units (ONUs), wherein the BWmap comprises a plurality of allocations, and wherein each allocation comprises a start time for the allocation, a grant size for the allocation, and a header error correction (HEC) for the allocation. | 10-31-2013 |
20130294775 | EPON With Power-Saving Features - A system and method for reducing power consumption in a Passive Optic Network (PON). The system comprises an optical line terminal (OLT), an optical network unit (ONU), a traffic-detection module configured to detect status of traffic to and from the ONU, and a power-management module configured to place the ONU in sleep mode based on the detected traffic status. The ONU includes transmitting and receiving components that are selectively powered down during the sleep mode based on a type of traffic in the ONU. | 11-07-2013 |
20130294776 | Passive Optical Networks with Mode Coupling Receivers - Disclosed herein is an apparatus comprising a plurality of separators configured to forward a plurality of optical signals from a plurality of optical network terminals (ONTs) along a plurality of single mode waveguides, a mode coupler coupled to the single mode waveguides and configured to receive the optical signals from the plurality of separators and combine the optical signals into a multi-mode waveguide, and an optical receiver coupled to the mode coupler via the multi-mode waveguide and configured to detect the optical signals. Also disclosed is a method comprising receiving a plurality of single mode optical channels, coupling the single mode optical channels into a multimode channel, and detecting the optical modes corresponding to the channels in the multimode channel. | 11-07-2013 |
20130315595 | TIME DIVISION DUPLEXING FOR EPoC - A method, system and computer program for implementing TDD in an EPoC network. An OLT or CLT scheduler segregates the US traffic from the DS traffic to avoid collisions. An OLT transmits and receives payloads through an OCU. An OLT or CLT transmits downstream payloads and GATE grants destined for CNUs during the TDD downstream phases. The OLT or CLT schedules IPGs between TDD phases. The OLT or CLT schedules payloads and REPORTs to be transmitted from CNUs only during the TDD upstream phase according to the GATE grants in the DS phase. The OLT or CLT receives CNU REPORTs late in the upstream phase that inform the scheduler about pending upstream traffic to be granted in subsequent TDD phases. | 11-28-2013 |
20130315596 | OPTIMIZED DYNAMIC BANDWIDTH SCHEDULER - A method allocating timeslots for transmission of data packets and REPORT messages in a communication network including plural logical links managed by a terminal, including: implemented at each cycle by the terminal receiving at least one REPORT message from at least one logical link, the REPORT message including an updated queue length expressed in timeslots of the logical link and, upon receiving the REPORT message, updating the image queue length, based on the updated queue length; allocating to logical links having non-zero image queue length at least one timeslot in a next cycle based on a theoretical transmission time for transmitting data packets or REPORT messages and based on a fraction of overhead associated with the transmission, until all timeslots of the next cycle are allocated or all image queue lengths are zero, and incrementing the theoretical transmission time of each logical link based on its required minimum bit rate. | 11-28-2013 |
20130322882 | Method and Apparatus of Building a Coaxial Convergence Layer in Ethernet Passive Optical Network (PON) over Coaxial Network (EPoC) - An apparatus comprising a data framer comprising a physical layer protocol stack comprising a coax convergence layer, a coax framing layer next to the convergence layer, wherein the coax framing layer is configured to decompose and assemble data packets in a coax network, a coax coding layer next to the coax frame layer, wherein the coax coding layer is configured to protect the coax transmissions from impairments, a coax modulation layer next to the coax coding layer, wherein the coax modulation layer is configured to modulate the data according to a coax physical layer (PHY), and a radio frequency layer next to the coax modulation layer and configured to interface to an electrical medium for a coaxial network. | 12-05-2013 |
20130336655 | Method of Operating a Primary Optical Node and a Secondary Optical Node - The invention relates to a method of operating a primary optical node, particularly an optical line terminal (OLT), for an optical communications system, wherein said OLT is configured to receive at least one upstream optical signal (uos) from at least one secondary optical node, particularly an optical networking unit (ONU), within at least a first wavelength range (wr | 12-19-2013 |
20140029947 | Method and Apparatus for Detecting Optical Network Unit, and Passive Optical Network System - Embodiments of the present invention disclose a method and an apparatus for detecting an ONU, and a passive optical network system. The method includes detecting an identity code of an ONU in an open uplink empty window or an empty timeslot, and determining that an ONU corresponding to the identity code of the ONU is a rogue ONU according to the identity code of the ONU. A corresponding apparatus and passive optical network system are also provided in the embodiments of the present invention. In the passive optical network system, a rogue ONU is detected and determined quickly and efficiently, and an effect on an uplink service is reduced. | 01-30-2014 |
20140064730 | OPTIC DISTRIBUTED ANTENNA SYSTEM SUPPORTING MULTI-BAND MULTI-CARRIER SERVICE OVER A REDUCED NUMBER OF OPTIC CORE LINES - An optic Distributed Antenna System includes a Head End (HE) configured to adjust a first signal for a first carrier at a first band to a first level, to adjust a second signal having at least a carrier different from the first carrier or a band different from the first band to a second level, to combine the first and second signals, to perform Electronic/Optic conversion on the combined signal, and to optic-distribute and send the combined optic signal, and a plurality of Remote Units (RUs) each connected to the HE over a corresponding single optic line, wherein each of the RUs is configured to perform Optic/Electronic conversion on the combined optic signal, to adjust the converted signal for each signal band, to perform high-power amplification on the adjusted signals, to multiplex the amplified signals, and to transmit the multiplexed signal to a Mobile station via at least one antenna. | 03-06-2014 |
20140072304 | Ethernet Passive Optical Network Over Coaxial (EPoC) Physical Layer Link and Auto-Negotiation - A PHY auto-negotiation and link up procedure for Ethernet Passive Optical Network Over Coax (EPOC) is provided. The procedure is compliant with the Ethernet Passive Optical Network (EPON) standard and can be used to bring an EPOC network to user traffic readiness. In addition, the procedure, or a variation thereof, can be used to enable periodic maintenance of the coaxial link of the EPOC network, thereby maintaining adequate communication conditions. | 03-13-2014 |
20140079396 | COMMUNICATION METHOD, OPTICAL COMMUNICATION SYSTEM, STATION-SIDE OPTICAL-LINE TERMINAL APPARATUS, AND USER-SIDE OPTICAL-LINE TERMINAL APPARATUS - An ONU includes the optical transceiver capable of an operation in a power-saving mode in which power consumption is reduced by stopping transmission while continuing reception, and a control device that controls to tentatively validate transmission of the optical transceiver and outputs a response signal when a control signal is received from an OLT during an operation in a power-saving state. Moreover, the OLT includes the control device that allocates a transmission bandwidth to the ONU even while the optical transceiver of the ONU operates in a power-saving mode and stops transmission and determines whether a communication failure occurs or the ONU is in operation in a power-saving mode based on the response signal received by a transceiver of the OLT. | 03-20-2014 |
20140079397 | SERIALLY-DISTRIBUTED DEVICES IN A COMMUNICATION NETWORK - Serially-distributed devices in a communication network include a cable including communication wires, a plurality of devices connected in series with the communication wires along a length of the cable, and a headend interface connected at one end of the cable and operable to provide a communication interface with the devices. | 03-20-2014 |
20140099114 | OPTICAL SIGNAL TRANSMITTING APPARATUS, OPTICAL FREQUENCY DIVISION MULTIPLEX TRANSMISSION SYSTEM, AND OPTICAL SIGNAL COMMUNICATION METHOD - An optical signal transmitting apparatus is disposed in an optical frequency division multiplex transmission system that includes plural nodes that are in an optical transmission path and respectively use a unique frequency to frequency-multiplex information with a carrier wave to transmit the information to an optical signal receiving apparatus in the optical transmission path. The optical signal transmitting apparatus outputs the carrier wave and includes a transmitting unit into which information to be delivered to the nodes is input, the transmitting unit transmitting the information using a frequency that does not overlap the unique frequencies used by the nodes; and a multiplexing unit that frequency-multiplexes output of the transmitting unit and the carrier wave, and sends the frequency-multiplexed output to the optical transmission path. | 04-10-2014 |
20140105603 | Systems and Methods for Advanced Power Management for Optical network Terminal Systems on Chip - Systems and methods are provided for customer premises equipment (CPE) on a passive optical network (PON). A system includes a packet processor having at least an active mode and a sleep mode, the packet processor configured to processes streams of data packets received in a data plane from an optical line terminal (OLT) through the PON when in an active mode and to enter the sleep mode when not receiving data packets in the data plane. A system further includes a micro-controller, separate from the packet processor, configured to receive from an OLT operation and management (OAM) messages that are transmitted in a control plane, and to process the OAM messages by, selectively transmitting to a central office, without waking up the packet processor, an acknowledgement message, or waking up the packet processor to receive data packets in the data plane. | 04-17-2014 |
20140126910 | System and Method for Passive Optical Network Communication - In one embodiment, a method for passive optical network (PON) communication includes broadcasting, by an optical line terminal (OLT), a first message including a first start time of a first quiet window and a first allocation identification number (Alloc-ID), where the first Alloc-ID indicates a first supported upstream line rate associated with the first quiet window. The method also includes receiving, by the OLT from a first optical network unit (ONU) during the first quiet window, a first serial number response, wherein a first transmitting upstream line rate of the first ONU is equal to the first supported upstream line rate. | 05-08-2014 |
20140147118 | APPARATUS FOR TRANSMITTING/RECEIVING VARIABLE-WAVELENGTH OPTICAL SIGNAL - There is provided an optical transceiver apparatus including an optical transmitter configured to transmit light of variable wavelength, an optical receiver configured to receive light generated from an opposite light source, and a controller configured to perform initialization to a wavelength corresponding to when an intensity of light received by the optical receiver is greater than or equal to a reference power, while varying the wavelength of light output by the optical transmitter. | 05-29-2014 |
20140161453 | AMPLIFICATION APPARATUS AND COMMUNICATION SYSTEM - An amplification apparatus includes: a circulator to receive, at a first terminal, first signal light transmitted from OLT to ONU and first light having a predetermined wavelength different from the first signal light and, at a third terminal, second signal light transmitted from ONU to OLT and second light having the predetermined wavelength; a first reflector to output reflected light back to a second terminal; a first optical amplifier to have an amplification band characteristic of amplifying at least the first signal light; a second reflector to output reflected light back to a fourth terminal; a second optical amplifier to have an amplification band characteristic of amplifying the second signal light without amplifying the second light having the predetermined wavelength; and a first partial reflector to have a wavelength transmission characteristic of outputting the light having a wavelength different from the predetermined wavelength to the second optical amplifier. | 06-12-2014 |
20140193150 | COMMUNICATION SYSTEM, STATION-SIDE COMMUNICATION DEVICE, USER-SIDE COMMUNICATION DEVICE, COMMUNICATION METHOD, AND CONTROL DEVICE - An OLT includes an OLT control unit that generates a control signal for controlling a power saving operation of an ONU by specifying a different idle period with respect to a first power saving operation in which an optical receiver is operated while an optical transmitter of the ONU is controlled to a power saving state and a second power saving operation for controlling the optical transmitter and the optical receiver to the power saving state, and a station-side transmitter that transmits the control signal generated by the OLT control unit to the ONU. The ONU includes an ONU control unit that receives the control signal via the optical receiver to selectively perform the first power saving operation and the second power saving operation based on the idle period specified by the control signal. | 07-10-2014 |
20140193151 | BUS-BASED OPTICAL NETWORK SYSTEM - A bus-based optical network system comprising optical fibers, optical line terminals (OLTs), and a plurality of optical network units (ONUs) is revealed. The OLT consists of the near part (OLTN) and the far part (OLTF). Optical fibers respectively form the transmitting and receiver buses (T Bus and R Bus) with the technique of time-division multiple access (TDMA). The slot flows on both buses are in opposite directions. The OLTN performing traffic control is situated in or near a central office (CO) while the OLTF is far from the CO. ONUs, whose MAC performs traffic control, connect with two buses and share their bandwidth. The MAC with traffic control keeps the performance of the network from degradation. The required numbers of COs and optical fibers for establishing the bus-based network are so smaller that the cost of the network can be significantly reduced. | 07-10-2014 |
20140219660 | ARRANGEMENT FOR DEPLOYING CO-EXISTING GPON AND XGPON OPTICAL COMMUNICATION SYSTEMS - A passive, coexisting 10 Gb/s passive optical network (XGPON) and Gb/s passive optical network (GPON) is created by using a pair of counter-propagating laser pump sources at a network-based optical line terminal, in combination with a feeder fiber, to create distributed Raman amplification for the upstream signals associated with both GPON and XGPON systems. A passive remote node is located at the opposite end of the feeder fiber, in the vicinity of a group of end-user locations, and includes a cyclic WDM and a pair of power splitters for the GPON and XGPON signals such that the GPON signals are thereafter directed through a first power splitter into optical network units (ONUs) specifically configured for GPON wavelengths and XGPON signals are directed through a second power splitter into ONUs configured for the XGPON wavelengths. The arrangement of the remote node allows for the reach and split ratios of the GPON and XGPON systems to be individually designed for optimum performance. | 08-07-2014 |
20140233951 | Antenna System and Methods for Wireless Optical Network Termination - Optical network termination systems, devices and methods including an optical network terminal (ONT) having a processor in communication with an external optical fiber. The ONT processors further in communication with a wireless access point and at least one electrically conductive internal transport medium, both providing for the communication of telecommunication signals with devices located within a customer premises. The wireless access point and in certain instances the processor are back powered over the electrically conductive internal transport medium from AC power within the premises. In certain embodiments, the wireless access point communicates with devices within the premises over a distributed antenna. | 08-21-2014 |
20140241723 | Bandwidth Distribution Based on Prior Granting Cycles - An apparatus comprises a receiver configured to receive a reported queue depth for a current granting cycle, and a processor coupled to the receiver and configured to determine accumulated bandwidth credits from at least one granting cycle prior to the current granting cycle. An apparatus comprises a transmitter configured to transmit a reported queue depth for a second granting cycle, a processor coupled to the transmitter, and a receiver coupled to the processor and configured to receive a transmission grant size that is based on the reported queue depth and accumulated bandwidth credits from a first granting cycle prior to the second granting cycle. | 08-28-2014 |
20140241724 | Transmission Prioritization Based on Polling Time - An apparatus comprises a receiver configured to receive a plurality of instructions, a plurality of first messages, and a plurality of second messages, a processor coupled to the receiver and configured to process the instructions, the first messages, and the second messages, and a transmitter coupled to the processor and configured to transmit the second messages based on the instructions, wherein the instructions instruct the processor to transmit the second messages based on polling times. An apparatus comprises a processor configured to compile instructions, wherein the instructions instruct prioritizing of data transmissions based on propagation delays, and a transmitter coupled to the processor and configured to transmit the instructions. | 08-28-2014 |
20140241725 | Wavelength Assignment for Multiple Operator Support - An apparatus comprising a plurality of optical line terminals (OLTs) corresponding to different providers that share an optical distribution network (ODN), a plurality of optical network units (ONUs) coupled to the OLTs via the same ODN and configured to communicate with the different OLTs using different corresponding pairs of upstream and downstream channels, wherein the upstream and downstream channels are interleaved across a plurality of wavelength bands and comprise a sequence of alternating and contiguous upstream and downstream channels, are aligned with a plurality of wavelength division multiplexing (WDM) channels, and satisfy a plurality of design requirements for the OLTs and ONUs. | 08-28-2014 |
20140255030 | METHOD AND APPARATUS FOR AUTHENTICATION IN PASSIVE OPTICAL NETWORK - A method and apparatus for authentication in a passive optical network are disclosed. In the disclosure, a first terminal serial number of an ONU and a first logic registration code are transmitted from the ONU to an OLT; if the OLT determines that the first terminal serial number does not match a second terminal serial number stored on the OLT, the OLT judges whether the first logic registration code received from the ONU matches a second logic registration code stored on the OLT; the OLT stores the first terminal serial number received from the ONU on the OLT if the first logic registration code matches the second logic registration code. | 09-11-2014 |
20140270774 | Systems and Methods of Hybrid DWDM Aggregation and Extension for Time Division Multiplexing Passive Optical Networks - Example embodiments of the systems and methods of hybrid DWDM aggregation and extension for time division multiplexing passive optical networks as disclosed herein solves problems facing cable operators and telecommunications operators by using WDM and DWDM technologies for time division multiplexing passive optical network aggregation and by extending the reach of the TDM PON beyond standard reach limits. An example system uses a downstream optical amplifier and an upstream repeater to extend the reach and for DWDM aggregation of the time division passive optical network. | 09-18-2014 |
20140270775 | METHOD FOR REGISTERING OPTICAL NETWORK UNIT IN TELECOMMUNICATIONS NETWORK AND OPTICAL NETWORK UNIT THEREFOR - In a telecommunications network including an optical line terminal (OLT) having optical subscriber units (OSUs) and an optical network unit (ONU) connected to the OLT, bandwidth allocation signals are periodically transmitted at a first period from the respective OSUs to the ONU, and an acknowledgement request signal is transmitted from at least one of the OSUs to the ONU at a second period having a value corresponding to the first period multiplied by a constant. If an ONU is registered in none of the OSUs, the first period is determined from reception intervals of the assignment signals, and a second period is calculated from the first period. Transmissive wavelength of a variable-wavelength (VW) filter in the ONU is periodically changed at a third period longer than the second period. In the OSU having transmitted the request signal, the unregistered ONU having received the request signal is registered. | 09-18-2014 |
20140314412 | SYSTEM AND METHOD FOR A SUBSCRIBER-POWERED NETWORK ELEMENT - A system for powering a network element of a fiber optic wide area network is disclosed. When communication data is transferred between a central office (CO) and a subscriber terminal using a network element to convert optical to electrical (O-E) and electrical to optical (E-O) signals between a fiber from the central office and twisted wire pair, coaxial cable or Ethernet cable transmission lines from the subscriber terminal, techniques related to local powering of a network element or drop site by the subscriber terminal or subscriber premise remote powering device are provided. Certain advantages and/or benefits are achieved using the present invention, such as freedom from any requirement for additional meter installations or meter connection charges and does not require a separate power network. | 10-23-2014 |
20140314413 | Access System, Communication Method and Device for Optical Fiber Network - Embodiments of the present invention provide an access system and a communication method for an optical fiber network. A virtual ONU located on a user side is established, and an ONU control plane function, a PON MAC function, and a QoS function on an existing ONU is moved downwards to a virtual ONU. After the forgoing function modules are removed from the existing ONU, the existing ONU becomes an ONU physical converter and only has a function of converting the PON physical layer frame and the first user side physical layer frame. | 10-23-2014 |
20140369689 | Dynamic Wavelength Management using Bi-directional Communication for the prevention of Optical Beat Interference - Preventing optical beat interference includes dynamically managing an adjustable optical transmitter wavelength of each of a plurality of customer premises equipment, wherein each of the plurality of customer premises equipment is in bidirectional communication with a customer premises equipment controller. A bidirectional communication system includes a customer premises equipment controller; and a plurality of customer premises equipment coupled to the customer premises equipment controller, each of the plurality of customer premises equipment having an adjustable optical transmitter wavelength, wherein each of the plurality of customer premises equipment is in bidirectional communication with the customer premises equipment controller to prevent optical beat interference by dynamically managing the adjustable optical transmitter wavelength of each of the plurality of customer premises equipment. | 12-18-2014 |
20150050022 | Method and Apparatus for Providing Optical Networking Using a Pluggable High-speed Interface - One embodiment of the present invention illustrates a high-speed PON converter (“HPC”) configured to be a pluggable high-speed PON conversion device used for coupling a user equipment (“UE”) to an optical network. HPC, in embodiment, includes a passive optical network (“PON”) interface, a high-speed electrical (“HSE”) interface, and a conversion component. The PON interface, which is coupled to an optical network via an optical fiber, is able to receive optical information from the optical fiber. The HSE interface is configured to be pluggable to the UE, such as a personal computer (“PC”), laptop, or tablet via a predefined removable connector. The conversion component converts and transmits signals between the HSE and PON interfaces. | 02-19-2015 |
20150050023 | Frequency Sub-Band Coding of Digital Signals - A transmitter, using frequency sub-band coding, can output a plurality of narrowcast and/or broadcast signals to a plurality of sub-groups or nodes along a single optical link. The transmitter can output the plurality of signals as multiple slices of spectrum, wherein each slice of spectrum is designated for a particular sub-group or node. The transmitter can further instruct each receiver or node as to which slice of spectrum to use and at which frequency to output the associated signal information to its intended subscribers. Thus, a single transmitter can feed narrowcast information to multiple nodes or receivers along a single optical link. In embodiments, channels can be monitored and manipulated on a channel-by-channel basis, and channels delivered using different network solutions can be combined. | 02-19-2015 |
20150063812 | COMPENSATOR FOR WAVELENGTH DRIFT DUE TO VARIABLE LASER INJECTION CURRENT AND TEMPERATURE IN A DIRECTLY MODULATED BURST MODE LASER - An optical node comprises a tunable optical transceiver having a laser and a temperature element. The optical node also comprises a wavelength shift stabilization circuit configured to adjust current provided to the temperature element such that wavelength shifts, due to changes in a drive current applied to the tunable optical transceiver, are reduced. | 03-05-2015 |
20150104173 | Timestamp Adjustment in Multi-Point Control Protocol (MPCP) Messages For Ethernet Passive Optical Network (PON) Protocol Over Coaxial Network - A method performed by a FCU comprising receiving a MPCP request message from a CNU via an electrical network, wherein the MPCP request message comprises a first timestamp, adjusting the first timestamp in the MPCP request message by an electrical network delay, and forwarding the MPCP request message with the adjusted timestamp to an OLT via an optical network. Also disclosed is a method performed by an OLT comprising receiving a MPCP message from a CNU via a FCU and an optical network, obtaining an arrival time of the MPCP message, adjusting a timestamp in the MPCP message by subtracting an electrical network delay from the timestamp, and computing a RTT delay based on the timestamp and the arrival time. | 04-16-2015 |
20150104174 | METHOD OF CONTROLLING OPTICAL NETWORK UNIT (ONU) IN SLEEP MODE - Provided is a method of saving power in a passive optical network (PON) system including an optical line terminal (OLT) and a plurality of optical network units (ONUs), the OLT including an optical transceiver to communicate with at least one ONU through an optical line, and a controller to control the optical transceiver to transmit an upstream bandwidth map to the ONU at a predetermined transmission interval, wherein the transmission interval is determined based on a desired upstream data service delay time. | 04-16-2015 |
20150304034 | N-INPUT RECEIVER: RFOG OBI MITIGATION WITH RETRANSMISSION - A multimode combiner or coupler (MMC) may combine the inputs into a larger core multimode fiber. The multimode combiner may be combined with a re-transmitting laser for detecting and re-transmitting signals. Thus, the multi-mode combiner may detect and combine input signals, and then retransmit the detected, combined signal. The detection can be implemented with multiple single mode fibers to small single mode detectors or a multi-mode coupler with a larger multi-mode detectors. In embodiments of the MMC, a bi-directional optical splitter/combiner includes a transmitter for re-transmitting an RF signal received at a receiver, a first wave division multiplexer (WDM) combiner combining the output of the first transmitter in an upstream direction to a downstream signal in a downstream direction, and a second WDM combiner combining split downstream signals in the downstream direction with upstream signals received via at least two optical fiber inputs. | 10-22-2015 |
20150304042 | OPTICAL AND RF TECHNIQUES FOR AGGREGATION OF PHOTO DIODE ARRAYS - An active receiver structure that combines a large number of detectors without bandwidth penalty may provide a better signal-to-noise ratio (SNR) than conventional Radio Frequency over Glass (RFoG) networks. A transmission line receiver is used to combine a large number of optical detectors into a single radio frequency (RF) signal without a bandwidth penalty and a modest penalty in noise performance that results in an SNR that is much better than traditional optical combining techniques that are followed by a single detector. An optical multiplexer structure may be designed around the active splitter such that passive optical network (PON) operation is not impeded. | 10-22-2015 |
20150304744 | SEAMLESS BANDWIDTH GROWTH WITH RFOG - A radio frequency over glass (RFoG) system may be modified to extend a downstream band. A transimpedance amplifier with a downstream path may be used in the RFoG system in combination with an upstream path having greater than 200 MHz radio frequency (RF) bandwidth to provide the greater than 1.2 GHz downstream bandwidth overlapping with the greater than 200 MHz upstream bandwidth. | 10-22-2015 |
20150319028 | PREAMBLE DESIGN AND DETECTION FOR RANGING IN AN OPTICAL OFDMA COMMUNICATION NETWORK - The invention relates to an optical OFDMA communication network, comprising a plurality of optical network units (ONUs), wherein each one of the ONUs is configured to generate a ranging sequence for upstream synchronization of the ONUs, a receiving unit for receiving signals of the ONUs, the receiving unit being also configured to receive the ranging sequences of the ONUs. The receiving unit comprises a correlator unit in which a plurality of ranging sequences is stored. The receiving unit is configured to perform a ranging detection operation including performing a correlation operation with a plurality of the received ranging sequences using at least one of the stored ranging sequences and to transmit a ranging response to the ONUs depending on the result of the correlation operation. | 11-05-2015 |
20150341136 | REFLECTING METHOD AND DEVICE FOR PERFORMING THE RECEIVING FUNCTION OF AN OPTICAL ACCESS NETWORK USING WAVELENGTH DIVISION MULTIPLEXING - The invention relates to a receiving device (Rx | 11-26-2015 |
20150341137 | DISCOVERY METHOD, OPTICAL COMMUNICATION METHOD, AND OPTICAL COMMUNICATION SYSTEM - A discovery method, an optical communication method, and an optical communication system which can reduce an error of RTTs when an identifier is fixed after an allocated wavelength has been changed in wavelength-tunable WDM/TDM-PON and can prevent lowering of the bandwidth utilization efficiency. A table, in which a correspondence between child nodes and fixed identifiers as well as the RTTs of a frame with each of the identifiers in all combinations of allocated wavelengths are recorded, is created through a discovery process. | 11-26-2015 |
20150365190 | METHOD OF CONFIGURING AUTOMATICALLY WAVELENGTH OF OPTICAL NETWORK UNIT - In one embodiment, an optical line terminal judges whether the optical network unit operates at a correct uplink wavelength and a correct downlink wavelength during an optical network unit activation progress; and broadcasts a wavelength configuration message if the optical network unit does not operate at the correct uplink wavelength and the correct downlink wavelength to instruct the optical network unit to tune its uplink wavelength and downlink wavelength respectively to the correct uplink wavelength and the correct downlink wavelength. | 12-17-2015 |
20150365191 | METHOD OF TUNING WAVELENGTH IN TIME AND WAVELENGTH DIVISION MULTIPLEXING-PASSIVE OPTICAL NETWORK (TWDM-PON) - A method of tuning a wavelength in a TWDM-PON which has a plurality of operable channels is provided. First, a second channel is added as an operating channel of the TWDM-PON in which at least a first channel is working, and then an OLT that is providing a service to an ONU through the first channel requests the ONU to tune to the second channel. In response to receiving the request, the ONU determines whether a downstream wavelength of the second channel has been recorded thereon. According to the determination result, the ONU sends to the OLT an ACK message that indicates that the ONU is able to perform wavelength tuning and then commences wavelength tuning to the second channel, or the ONU sends to the OLT a NACK message that indicates that the ONU is unable to perform wavelength tuning. | 12-17-2015 |
20150381306 | Optical Line Terminal (OLT) Support of Optical Network Unit (ONU) Calibration - An optical line terminal (OLT) channel termination (CT) comprises a receiver configured to receive an upstream message which comprises a correlation tag from an optical network unit (ONU), wherein the correlation tag represents a unique number, a processor coupled to the receiver and configured to process the upstream message, and generate a downstream message based on the upstream message, wherein the downstream message comprises the correlation tag, and a transmitter coupled to the processor and configured to transmit the downstream message to the ONU. | 12-31-2015 |
20160087745 | SUPPORTING AN ADD-ON REMOTE UNIT (RU) IN AN OPTICAL FIBER-BASED DISTRIBUTED ANTENNA SYSTEM (DAS) OVER AN EXISTING OPTICAL FIBER COMMUNICATIONS MEDIUM USING WAVELENGTH DIVISION MULTIPLEXING (WDM) - Embodiments disclosed in the detailed description include supporting an add-on remote unit(s) (RU) in an optical fiber-based distributed antenna system (DAS) over existing optical fiber communication medium using wavelength division multiplexing (WDM). An existing DAS comprises at least one existing head end equipment (HEE) communicatively coupled to a plurality of existing RUs through an optical fiber communication medium. In aspects disclosed herein, an add-on RU is added to the existing DAS to support additional wireless communications. No new optical fibers are required to be deployed to support communications to the add-on RU in the DAS. Instead, the DAS is configured to support the add-on RU through the existing optical fiber communication medium using WDM. Thus, the add-on RU can be added to the existing DAS without adding new optical fibers, thus leading to reduced service disruptions and deployment costs. | 03-24-2016 |
20160087748 | USING NOISY WINDOW FOR UNCALIBRATED OPTICAL NETWORK UNIT ACTIVATION - A method of Noisy Window and associated management messages to support set splitting if activating ONUs with uncalibrated transmitter, offering a power grant for unmodulated upstream transmission, measuring the average received optical power in all upstream wavelength channels and providing downstream indication of the upstream activation in the optical communication network wavelength channel with abnormally high average received power. | 03-24-2016 |
20160105237 | BI-DIRECTIONAL TRAFFIC ACCESS POINT - When a bi-directional TAP receives via a first multimode bi-directional fiber a signal transmitted by a storage array to a server, a collimator collimates the light of the signal towards a splitter. The splitter splits the signal into two portions. One portion is output to a second multimode bi-directional fiber connected to the server and the other portion is output to a monitoring system for analysis. When the bi-directional TAP receives via the second fiber a signal transmitted by the server to the storage array, the collimator collimates the light of the signal towards the splitter. The splitter splits the signal into two portions. One portion is output to the first fiber so that it can be received by the storage array. The other portion is output to the monitoring system. The bi-directional TAP can be a reflective or a transmitted type of TAP. | 04-14-2016 |
20160105253 | Upstream Wavelength Calibration in Optical Networks - An optical line terminal (OLT) comprises a processor configured to designate an extended quiet window having a start time and a stop time. The processor may be further configured to suspend upstream transmission during the extended quiet window. The OLT further comprises a transmitter that transmits a serial number (SN) grant to an optical network unit (ONU) during the extended quiet window. Upon receiving the SN grant, the ONU may transmit a plurality of calibration request messages during the extended quiet window. Each of the calibration request messages correspond to a different attempt wavelength. The OLT may receive one of the calibration request messages at a successful attempt wavelength. The OLT transmits a calibration response message identifying the successful attempt wavelength. | 04-14-2016 |
20160134374 | ELECTROMAGNETIC SIGNAL TRANSPORT AND DISTRIBUTION SYSTEM - An electromagnetic signal transport and distribution system and method provides for aggregating signals from multiple transport media and for distributing the signals to multiple end points in one or multiple formats to suit end user devices. | 05-12-2016 |