| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 398063000 | Passive star | 29 |
| 20080226294 | Passive optical network system and method of data transmission in the passive optical network - Regarding the passive optical network (PON) system of the present invention, in an OLT, data of different bit rates is framed, and framed data rows are subjected to FEC encoding processing without changing the line up of the data, and a check bit is added to the end of the frame, and an optical signal that has been modulated in accordance with the data row to which the check bit has been added is transmitted to the optical transmission line. Then in an ONU that corresponds to a high speed bit rate to which an optical signal from the OLT has been applied via a power splitter, forward error correction of the reception data is performed. As a result in a PON system in which data of different bit rates coexist, the minimum reception rate of a high speed ONU can be improved without having an influence on a low speed ONU. | 09-18-2008 |
| 20080310841 | Long-Reach Wavelength Division Multiplexing Passive Optical Network (Wdm-Pon) - The present invention relates to a long-reach wavelength division multiplexing passive optical network(WDM-PON), and especially to the long-reach WDM-PON capable of ensuring economic and stable QoS (Quality of Service). The Long-reach WDM-PON in accordance with the present invention includes an optical transmitter/receiver located at central office and each optical network termination; wavelength division multiplexer/demultiplexer located at said central office and remote node; and broadband incoherent light source which is connected with a long-reach single-mode fiber to said wavelength division multiplexer/demultiplexer and spectrum-sliced and injected into the transmitters located at said central office and each optical network termination. | 12-18-2008 |
| 20090016720 | Problem detection device at ONU end in PON system and method thereof - A problem detection device at an optical network unit (ONU) end in a passive optical network (PON) system and a method thereof are provided, which aim at solving the problem that the user cannot check out photo-physical data on the physical architecture, logical signal information on the logical architecture, and parameter information on the network communication protocol of the PON system economically, quickly, and accurately, once a connection error occurs at the ONU end. The technical lies in using an optical network signal to pass through the integrated optical path analysis module, the ONU module, and the network communication protocol message analysis module included in the problem detection device to achieve the detection and analysis of the problem of the ONU connection error at one time once the problem detection device is connected to the PON system. | 01-15-2009 |
| 20090022494 | OPTICAL NETWORK TERMINAL, METHOD FOR CONFIGURING RATE LIMITING ATTRIBUTES OF PORTS, AND METHOD FOR PROCESSING PACKETS - The present invention relates to an optical network terminal (ONT), a method for configuring rate limiting attributes of ports, and a method for processing packets. The ONT includes a passive optical network (PON) protocol processing module, and a user network interface (UNI) module, which are connected through an internal interface. The ONT also includes a port rate limiting module connected to a UNI. The port rate limiting module stores rate limiting attributes, and the ONT uses these attributes to control the traffic of the UNI. The port rate limiting attributes are configured for the ONT through an ONT management and control interface (OMCI) message of an optical line terminal (OLT). In this way, when the ONT receives data from the UNI, it can control the traffic of the UNI according to the port rate limiting attributes. The present invention enables the port rate limiting function for the ONT, prevents overflow of the internal receiving buffer of the ONT, and prevents denial of service (DoS) attacks from illegal users. | 01-22-2009 |
| 20090110398 | Electrical point-to-multipoint repeater for PON - The present invention relates to an electrical point-to-multipoint repeater for Passive Optical Networks (PONs). A multiport passive optical network extender ( | 04-30-2009 |
| 20090202242 | PASSIVE OPTICAL NETWORK SYSTEM, OPTICAL LINE TERMINATOR AND, COMMUNICATION METHOD OF PASSIVE OPTICAL NETWORK SYSTEM - A passive optical network system (PON) has a plurality of OLTs and ONUs with different transmission rates. OLTs with different transmission rates share information of priority frames and destinations, and determine timing for frame transmission to ONUs so that the signal from each of the OLTs does not collide when multiplied in a splitter. OLTs transmit the data to the ONU as a burst signal to prevent the signals with different rates from colliding. ONU acquires the information of the following burst frames. ONU receives only the signal addressed to the own ONU or with the transmission rate of own ONU, therefore errors in ONUs can be avoided. OLT receives only the signal with the transmission rate of own OLT from ONUs based on the transmission timing from the ONUs shared by the line terminators, errors in OLTs can be avoided. | 08-13-2009 |
| 20090232499 | Passive optical network communication method and system - A passive optical network communication system transmits an optical time-division multiplexed signal from a central office through a passive optical coupler to a number of subscribers, and transmits optical encoded signals from the subscribers through the passive optical coupler to the central office. Optical encoded signals from different subscribers are separated by a decoding process performed at the central office. All operations can be synchronized with a clock signal which is generated at the central office and recovered from the optical time-division multiplexed signal by the subscribers' equipment. The communication range can be extended inexpensively by using a single high-power light source at the central office while using relatively low-power light sources at the subscribers' equipment. | 09-17-2009 |
| 20090257749 | Upgradeable Passive Optical Network - A passive optical network is upgraded by a subsystem PON | 10-15-2009 |
| 20100074619 | LASER SOURCE FOR A PASSIVE OPTICAL NETWORK - A method comprises: receiving a RF signal; providing a RF signal level; varying a laser power DC set point linearly with the RF signal level over a selected range; and modulating with the RF signal laser output power about the DC set point. The RF signal level can be RF signal amplitude or RF signal power. An apparatus comprises: a laser; a RF detector adapted to receive the RF signal and to provide the RF signal level; a laser power control circuit coupled to the RF detector and to the laser and adapted to vary the laser power DC set point substantially linearly with respect to the RF signal level over a selected range; and a laser modulator coupled to the laser and adapted to receive the RF signal and to modulate therewith laser output power about the DC set point. | 03-25-2010 |
| 20100098419 | GIGABIT PASSIVE OPTICAL NETWORK (GPON) RESIDENTIAL GATEWAY - A gigabit passive optical network (GPON) residential gateway comprising a microprocessor for at least processing packets including voice data and packets including video data; dual packet processors for performing GPON and residential gateway processing tasks; a plurality of Ethernet media access control (MAC) adapters for interfacing with a plurality of subscriber devices; a GPON MAC adapter for interfacing with an optical line terminal (OLT) of the GPON; and a digital signal processor (DSP) for processing voice signals. | 04-22-2010 |
| 20100135660 | OPTICAL LINE TERMINAL IN GIGABIT PASSIVE OPTICAL NETWORK AND METHOD FOR TRANSMITTING BROADCAST FRAME USING THE SAME - Disclosed are an optical line terminal in a gigabit passive optical network and a method for transmitting a broadcast frame using the same. The optical line terminal allocates second port identifiers to optical network units such that a broadcast frame is prevented from being retransmitted to an optical network unit which has transmitted the broadcast frame to the optical line terminal. | 06-03-2010 |
| 20100239253 | Passive Optical Network System Supporting Wireless Communication - A passive optical network (PON) system supporting wireless communication includes an optical line terminal (OLT) configured on a central office, an optical distribution network (ODN), and a plurality of optical network units (ONUs) respectively configured on user ends. The ODN is connected to the OLT and the ONUs in a one-to-many manner. The OLT sends a downstream optical signal to the ODN, and receives an upstream optical signal. The ODN circularly guides the optical signal to each ONU. Each ONU receives and reflects the downstream optical signal, processes the received downstream optical signal, receives and processes the upstream optical signal, carries an electrical signal to be uploaded into the upstream optical signal, and carries data received by a remote antenna into the upstream optical signal. Through the above architecture, the PON system supports wireless communication. | 09-23-2010 |
| 20100322626 | MULTIPLE PASSIVE OPTICAL NETWORK SYSTEM - Disclosed are a multiple passive optical network system and a wavelength splitter/combiner used in the same. The multiple passive optical network (PON) system includes a first PON, and a second PON which provides a service different in speed and capacity from the first PON while partially sharing network resources with the first PON. Thereby a subscriber can receive service through a network having a desired capacity and speed. | 12-23-2010 |
| 20110020001 | TIME DIVISION MULTIPLE ACCESS OVER WAVELENGTH DIVISION MULTIPLEXED PASSIVE OPTICAL NETWORK - Provided is a time division multiple access over wavelength division multiplexed passive optical network (TDM-over-WDM-PON) system. According to the TDM-over-WDM-PON system, a downstream optical signal is separated according to a wavelength in a remote node, transmitted to an optical amplifying device located in subscriber equipment, amplified in the optical amplifying device, transmitted back to the remote node, and then transmitted to the subscriber equipment. Also, an upstream optical signal is transmitted to a wavelength converting device located in the subscriber equipment from the remote node, wavelength-converted in the wavelength converting device, returned back to the remote node, and then transmitted to a central office. | 01-27-2011 |
| 20110020002 | OPTICAL LINE TERMINAL, METHOD FOR OPERATING OPTICAL RECEPTION INTERFACE, AND METHOD FOR PROCESSING CONTINUOUS MODE SIGNAL OF OPTICAL LINE TERMINAL - An Optical Line Terminal (OLT) configuring a Passive Optical Network (PON) is provided. The OLT includes an optical transmitter that transmits an optical signal to Optical Network Units (ONUs) in a downstream direction, an optical receiver that includes general Continuous Mode (CM) signal processing elements to recover clocks and data from optical signals transmitted by ONUs in an upstream direction, and a controller that controls the ONUs such that the optical receiver continuously receives an optical signal. An OLT interface for receiving an optical signal can be implemented using the general CM signal processing elements. | 01-27-2011 |
| 20110064410 | COLOR FREE WDM PON BASED ON BROADBAND OPTICAL TRANSMITTERS - A Wavelength Division Multiplexed Passive Optical Network (WDM-PON) includes a plurality of broadband light sources, each broadband light source being connected to receive a respective data signal and generating a corresponding modulated broadband optical signal. An Array Waveguide Grating (AWG) is connected for receiving each modulated broadband optical signal through a respective branch port and for generating a filtered broadband signal. The AWG implements a filter function comprising a respective pass-band associated with each branch port such that the filtered broadband signal exhibits a respective intensity peak associated with each pass-band. Each intensity peak is modulated with data from a respective one of the broadband light sources. A bandwidth of the respective modulated broadband optical signal generated by each broadband light source is at least equal to the width of a channel-band of the AWG. | 03-17-2011 |
| 20110091211 | OPTICAL LINE TERMINAL CAPABLE OF ACTIVE BANDWIDTH ALLOCATION FOR PASSIVE OPTICAL NETWORK SYSTEM - In a GPON system conforming to ITU-T Recommendations G.984.3, an optical line terminal is provided which has an active bandwidth allocation function that preferentially puts small bandwidth signals in a particular segment of a frame, e.g., at a head of the frame, to prevent fragmentations that may occur particularly when allocating small bandwidths of about 100 kbits/s. | 04-21-2011 |
| 20110150474 | PACKET TRANSPORT LAYER PASSIVE OPTICAL NETWORK (PTL-PON) PROVIDING SYSTEM AND METHOD - A packet transport layer passive optical network providing method controls an optical line termination device and an optical network terminal or an optical network unit of the subscriber end to transport packet transport layer passive optical network packets between the optical network terminals or the optical network units and the optical line termination device, and the optical network terminals or the optical network unit of the subscriber end becomes an end point of a packet transport layer connection. | 06-23-2011 |
| 20110150475 | System and Method for Pluggable Optical Modules for Passive Optical Networks - An optical local area network includes a passive optical distribution fabric interconnecting a plurality of nodes including a first node and a plurality of remaining nodes, a hub that includes the first node and a control module, and a client network adapter coupled to each of the remaining nodes for responding to the control module. The control module controls timing for each of the client network adapters to transmit signals over the passive optical distribution fabric and distribution of signals to each of the nodes. | 06-23-2011 |
| 20110150476 | DELAY CONTROL METHOD IN PASSIVE OPTICAL NETWORK, AN OPTICAL LINE TERMINAL AND A PASSIVE OPTICAL NETWORK - A method for controlling delay in a Passive Optical Network (PON) is applicable when a Precision Timing Protocol (PTP) message is transmitted in a downlink direction. The method includes obtaining a buffer duration of the PTP message destined for an Optical Network Unit (ONU), storing the PTP message destined for the ONU, and sending the PTP message to the ONU when a duration for storing the PTP message reaches the buffer duration. | 06-23-2011 |
| 20110243560 | Passive optical communication network system extendable with codec modules - In a passive optical communication network system, an optical signal OCDM-coded is transmitted from an OLT to a first port of a circulator, which in turn transfers the signal from its second port to one end of a first SSFBG. The first SSFBG then decodes the signal of one channel to output the decoded signal from its one end to the second port of the circulator, which in turn transmits the decoded signal from its third port to an ONU. When the ONU transmits an optical signal to the third port of the circulator, the circulator transfers the signal from its fourth port to one end of a second SSFBG, which in turn encodes the signal to output the encoded signal from its one end to the fourth port of the circulator. The circulator then transmits the encoded signal from its first port to the OLT. | 10-06-2011 |
| 20120106960 | RELIABLE LOAD-BALANCED MULTI-PHOTONIC STAR CONFIGURATION - A photonic-based distributed network switch that utilizes multiple photonic broadcast stars and separate optical transmitters to improve overall reliability, allow load balancing, and provide failover for the network switch and the network with which the switch is used. | 05-03-2012 |
| 20120106961 | METHOD FOR DATA FRAME REDUCTION IN A PHOTONIC-BASED DISTRIBUTED NETWORK SWITCH - A photonic-based distributed network switch and method where the switch is designed to reduce or filter optical data frames entering a port of the switch so that only data frames that are appropriate for the port are forwarded from the port. This reduces the amount of data that needs to be handled by the port interface, which is especially important where the port may be using legacy interface technology that may be incapable of handling the volume of data entering the port. | 05-03-2012 |
| 20120128358 | Transmission Method and Assembling Method for Physical Layer Operations, Administration and Maintenance (PLOAM) Message in a Passive Optical Network - The present invention provides a transmission method for a physical layer operations, administration and maintenance (PLOAM) message in a passive optical network. The method includes: a transmitter dividing a PLOAM message to generate more than two new PLOAM messages, each of which comprises at least a message identification (Message ID) field ( | 05-24-2012 |
| 20120163816 | Passive Optical Network with Sub-Octave Transmission - A passive optical network for transmitting digital signals incorporates sub-octave filters for the removal of distortions introduced into the signals as they are transmitted over the fiber optic cable of the network. Stated differently, second order distortions that result when the light beam carrying the digital signals is passed through a fiber optic cable are removed by the sub-octave filter. Further, the employment of another passive optical network on the same fiber optic cable with the present network is provided for. And, considerations for ensuring the compatibility of upstream and downstream transmission frequencies with the sub-octave filters are disclosed. | 06-28-2012 |
| 20120163817 | CONNECTION MANAGEMENT SERVER, OLT, ONU/ONT AND THE SYSTEM AND METHOD FOR PROVIDING ETHERNET-BASED PTL-PON - Provided is a passive optical network (PON) providing system of an Ethernet-based packet transport layer (PTL) scheme, including: a connection management server to manage a unified PTL connection overall over the network by establishing a PTL connection between an optical network unit (ONU)/optical network terminal (ONT) of a customer termination of one party and an ONU/ONT of a customer termination of another party, and by applying a PTL-PON scheme to a PON section between the ONU/ONT and an optical line termination (OLT); an OLT to manage a connection of a received packet, and to convert a format of the packet according to a transmission direction of the packet and thereby transmit the packet; and an ONU/ONT becoming an end point of the PTL connection to convert the format of the packet according to the transmission direction of the received packet and to thereby transmit the packet to a customer terminal or the OLT. | 06-28-2012 |
| 20120177371 | MULTIPLE STAR WAVELENGTH DIVISION MULTIPLEXING PASSIVE OPTICAL NETWORKS USING A WAVELENGTH ASSIGNMENT METHOD - The present invention discloses a multiple star wavelength division multiplexing passive optical network system using a wavelength assignment method. | 07-12-2012 |
| 20130136448 | MESHED PROTECTED PASSIVE OPTICAL ACCESS NETWORK STRUCTURE AND OPTICAL NETWORK UNIT STRUCTURE THEREFORE - Provided is an optical network system and optical network unit (ONU) structure enabling a passive optical access network having a meshed structure with at least two central nodes and plurality of ONUs. One embodiment employs a partially or fully meshed structure of optical fibers between customer locations and multiple optical line terminal (OLT) locations creating a passive optical access network. The ONUs can communicate with a neighboring OLT or ONU using a symmetrical or asymmetrical TDM scheme, and convert between the different TDM schemes. For this purpose, the ONU structure includes two transceiver units, one connected to the western network port and the other to the eastern. The ONU can establish communication between either network port and a further ONU or an OLT, with the ONU controller adapted for passing through data, and converting TDM schemes. | 05-30-2013 |
| 398064000 | Repeater | 1 |
| 20080273877 | System and Method for Managing Communication in a Hybrid Passive Optical Network - In accordance with the teachings of the present invention, a system and method for managing communication in a hybrid passive optical network (HPON) is provided. In a particular embodiment, the method includes transmitting, at a first wavelength, a first configuration message on the HPON. The method also includes receiving at one or more of a plurality of receivers at an optical line terminal (OLT) one or more configuration response messages from one or more optical network units (ONUs) in a first set of ONUs. The method further includes, based on the configuration response messages from the first set of ONUs, associating, in a database, each ONU in the first set of ONUs with the first wavelength and with the receiver receiving the configuration response message from the ONU. The method also includes, after transmitting the first configuration message, transmitting, at a second wavelength, a second configuration message on the HPON. The method further includes receiving at one or more of the plurality of receivers at the OLT one or more configuration response messages from one or more ONUs in a second set of ONUs, wherein the ONUs in the second set of ONUs do not belong to the first set of ONUs. The method also includes, based on the configuration response messages from the second set of ONUs, associating, in the database, each ONU in the second set of ONUs with the second wavelength and with the receiver receiving the configuration response message from the ONU. | 11-06-2008 |
