Including Subscribers Patents (Class 398/71)
  • Patent number: 12074644
    Abstract: A network element includes at least one processor and at least one memory. The at least one non-transitory memory including computer program code configured to, when executed by the at least one processor, cause the apparatus to determine whether a bit error rate (BER) of a FEC codeword is at or below a correctable BER, wherein the FEC codeword is transmitted between an OLT and ONU, a first percentage of the FEC codeword is at a lower order modulation, and a second percentage of the FEC codeword is at a higher order modulation, establish, based on a determination that the BER is at or below the correctable BER, a connection between the OLT and the ONU at the higher order modulation, and maintain, based on a determination that the BER is greater than the correctable BER, the connection between the OLT and the ONU at the lower order modulation.
    Type: Grant
    Filed: December 1, 2022
    Date of Patent: August 27, 2024
    Assignee: Nokia Solutions and Networks Oy
    Inventors: Doutje Van Veen, Vincent Houtsma
  • Patent number: 12052056
    Abstract: An object of the present disclosure is to enable an ONU to acquire ID information of terminal devices even when a network device is connected between the ONU and the terminal devices, and to thereby enable generation of a logical path between the ONU and the OLT. The present disclosure relates to an optical communication network system configured to connect a terminal device and a passive optical network (PON) system via a network device. The PON system includes an optical line terminal and an optical network unit connected using an optical transmission line. The network device is configured to acquire ID information of the terminal device, and notify the optical network unit of the acquired ID information. The optical network unit is configured to acquire ID information of the terminal device from the network device, and generate a logical path to the optical line terminal on the optical transmission line using the acquired ID information.
    Type: Grant
    Filed: March 31, 2020
    Date of Patent: July 30, 2024
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Takuya Abe, Satoshi Narikawa, Tomohiko Ikeda
  • Patent number: 12003276
    Abstract: A 10G rate OLT terminal transceiver integrated chip based on EPON with EML laser includes: a burst mode receiver RX which processes signal amplification and selects one of the two preset channels as a working channel for output through receiving an external command from a host; a continuous mode transmitter TX which receives the electrical signal attenuated by a PCB board, and selects a bypass BYPASS path or a clock data recovery CDR path according to a degree of attenuation to drive the EML laser; a digital control unit DIGITAL for path selection of the burst mode receiver RX; and a power module POWER, wherein the opening and closing of the two rate channels are controlled by the level judgment unit and the output blocking unit.
    Type: Grant
    Filed: July 24, 2023
    Date of Patent: June 4, 2024
    Inventors: Jinghu Li, Zhang Fan, An Lin
  • Patent number: 11997437
    Abstract: The techniques described herein are directed to an in-line diagnostic tool of a PON that optically couples a first component of the PON and a second component of the PON. The tool detects incoming optical signals (e.g., of different services) received from the first PON component and passes the optical signals through the tool to the second PON component. The in-line diagnostic tool is configured to detect one or more conditions of the incoming optical signals, the PON, and/or sub-components of the tool, perform one or more diagnostic and/or analytics routines, and generate and transmit a diagnostic signal including information indicative of the detected conditions and/or the results of the diagnostic and/or analytics routines to be transmitted via one or more output interfaces of the in-line diagnostic tool to recipient devices and/or applications.
    Type: Grant
    Filed: April 27, 2023
    Date of Patent: May 28, 2024
    Assignee: FRONTIER COMMUNICATIONS HOLDINGS, LLC
    Inventor: John Valdez
  • Patent number: 11916599
    Abstract: A wavelength tuning method and a related device, the method including receiving, by a remote optical module, a wavelength control signal from a central office terminal, where the wavelength control signal indicates a target wavelength tuned by the remote optical module, and where the wavelength control signal is loaded into a first optical service signal in a pilot tone manner, and tuning, by the remote optical module, an operating wavelength of the remote optical module based on the wavelength control signal.
    Type: Grant
    Filed: March 1, 2022
    Date of Patent: February 27, 2024
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Enbo Zhou, Fang Jiang
  • Patent number: 11909446
    Abstract: A data transmission method includes receiving, by an optical line terminal (OLT) from an optical network unit (ONU), uplink burst data that includes a synchronization data block and a payload, where the synchronization data block includes first synchronization data, wherein the first synchronization data includes a first preamble and an ONU identifier, and a first bandwidth occupied by the first frequency distribution of the first synchronization data is narrower than a second bandwidth occupied by the second frequency distribution of the payload, and obtaining, by the OLT from the first synchronization data, the ONU identifier.
    Type: Grant
    Filed: October 10, 2022
    Date of Patent: February 20, 2024
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Xuming Wu, Shengping Li, Lei Zhou, Xiaofei Zeng
  • Patent number: 11876560
    Abstract: An optical network communication system includes an optical hub, an optical distribution center, at least one fiber segment, and at least two end users. The optical hub includes an intelligent configuration unit configured to monitor and multiplex at least two different optical signals into a single multiplexed heterogeneous signal. The optical distribution center is configured to individually separate the at least two different optical signals from the multiplexed heterogeneous signal. The at least one fiber segment connects the optical hub and the optical distribution center, and is configured to receive the multiplexed heterogeneous signal from the optical hub and distribute the multiplexed heterogeneous signal to the optical distribution center. The at least two end users each include a downstream receiver configured to receive one of the respective separated optical signals from the optical distribution center.
    Type: Grant
    Filed: August 9, 2022
    Date of Patent: January 16, 2024
    Assignee: Cable Television Laboratories, Inc.
    Inventors: Luis Alberto Campos, Zhensheng Jia
  • Patent number: 11843416
    Abstract: The present disclosure provides a network architecture in which the modem in a hybrid metallic-optical fiber access network is moved from the customer premises to the distribution point. Multiple copper pairs can be used to transmit phantom modes over the copper pairs to the distribution point. Alternatively, or in addition, multiple data signals can be transmitted to a single customer premises with the modem collating the multiple data signals at the distribution point.
    Type: Grant
    Filed: March 25, 2019
    Date of Patent: December 12, 2023
    Assignee: British Telecommunications Public Limited Company
    Inventor: Andrew Chattell
  • Patent number: 11784741
    Abstract: A method of communication includes receiving, by an optical line terminal (OLT), a registration request from an optical network unit (ONU) through a specific upstream wavelength, assigning, by the OLT, out of a plurality of normal service upstream wavelengths and a plurality of normal service downstream wavelengths in a wavelength resource pool, a normal service upstream wavelength and a normal service downstream wavelength to the ONU for a normal service between the ONU and the OLT, and informing, through a specific downstream wavelength, the ONU of information regarding the normal service upstream wavelength and the normal service downstream wavelength. The specific downstream and upstream wavelengths are reserved for a registration process that includes receiving, through the specific upstream wavelength, the registration request and sending, through the specific downstream wavelength, the information regarding the normal service upstream wavelength and the normal service downstream wavelength.
    Type: Grant
    Filed: March 9, 2021
    Date of Patent: October 10, 2023
    Assignee: ZTE Corporation
    Inventors: Jun Shan Wey, Junwen Zhang
  • Patent number: 11770188
    Abstract: The present disclosure relates to an optical line terminal, OLT, which is enabled to range optical network units, ONUs, in a point-to-multipoint optical network by detecting interference burst sequences transmitted by one or more joining ONUs during transmission of upstream data traffic from transmitting ONUs. The present disclosure further relates to an optical network unit, ONU, which is enabled to transmit, at a selected transmission time, an interference burst sequence including a sequence of pulses allowing the OLT to identify the ONU as a joining ONU.
    Type: Grant
    Filed: December 2, 2021
    Date of Patent: September 26, 2023
    Assignee: Nokia Solutions and Networks Oy
    Inventors: Paul Henri Marie Cautereels, Carl Julien Godelieve Mertens, Michael Fivez, Rene Bonk
  • Patent number: 11736206
    Abstract: A silicon photonics (SiP) chip includes MAC and PHY blocks interconnected by optical waveguides (560) to provide network interface for a computer system. The SiP chip may be formed in a package mounted to the computer's motherboard. In an example, the computer system is a blade server module mounted in a datacenter chassis.
    Type: Grant
    Filed: February 4, 2021
    Date of Patent: August 22, 2023
    Assignee: Dell Products L.P.
    Inventors: Shree Rathinasamy, Victor B. Teeter
  • Patent number: 11705980
    Abstract: A passive optical network includes a central office providing subscriber signals; a drop terminal; and a wave division multiplexer. A fiber distribution hub may split or separate out dedicated optical signals from subscriber optical signals between the central office and the drop terminal. The wave division multiplexer separates dedicated optical signals pertaining to a specific dedicated subscriber from other optical signals on the line received at the wave division multiplexer. The wave division multiplexer may be part of a cable or part of an intermediate service terminal.
    Type: Grant
    Filed: May 17, 2021
    Date of Patent: July 18, 2023
    Assignee: CommScope Technologies LLC
    Inventors: Erik J. Gronvall, Trevor D. Smith
  • Patent number: 11687472
    Abstract: An interface for a semiconductor device is provided. The semiconductor device has a master device and multiple slave devices as stacked up with electric connection. The interface includes a master interface, implemented in the master device and including a master interface circuit with a master bond pattern. Further, a slave interface is implemented in each slave device and includes a slave interface circuit with a slave bond pattern to correspondingly connect to the master bond pattern. A clock route is to transmit a clock signal through the master interface and the slave interface. The master device transmits a command and a selecting slave identification through the master interface to all the slave interfaces. One of the slave devices corresponding to the selecting slave identification executes the command and responds a result back to the master device through the slave interfaces and the master interface.
    Type: Grant
    Filed: August 20, 2020
    Date of Patent: June 27, 2023
    Assignees: GLOBAL UNICHIP CORPORATION, Taiwan Semiconductor Manufacturing Company, Ltd.
    Inventors: Igor Elkanovich, Amnon Parnass, Pei Yu, Li-Ken Yeh, Yung-Sheng Fang, Sheng-Wei Lin, Tze-Chiang Huang, King Ho Tam, Ching-Fang Chen
  • Patent number: 11553260
    Abstract: An optical network includes top networking ports coupled to a packet switch, first media converters, second media converters, and bottom networking ports. The first media converters are coupled to top networking ports, each of the first media converters including a first ASIC transceiver that has a circuit switch function. The second media converters are coupled to the first media converter via optical cables to receive the optical signals. Each of the second media converters includes a second ASIC transceiver that has a circuit switch function. The bottom networking ports are coupled to the second media converters. The first ASIC transceiver and the second ASIC transceiver are configured to transmit a signal from one of the top networking ports to any one of the bottom networking ports, and transmit a signal from one of the bottom networking ports to any one of the top networking ports.
    Type: Grant
    Filed: March 16, 2022
    Date of Patent: January 10, 2023
    Assignee: Hewlett Packard Enterprise Development LP
    Inventors: Anu Mercian, Terrel Morris, Jean Tourrilhes, Derek Spock, Puneet Sharma
  • Patent number: 11509395
    Abstract: A data transmission method includes receiving, by an optical line terminal (OLT) from an optical network unit (ONU), uplink burst data that includes a synchronization data block and a payload, where the synchronization data block includes first synchronization data, wherein the first synchronization data includes a first preamble and an ONU identifier, and a first bandwidth occupied by the first frequency distribution of the first synchronization data is narrower than a second bandwidth occupied by the second frequency distribution of the payload, and obtaining, by the OLT from the first synchronization data, the ONU identifier.
    Type: Grant
    Filed: March 9, 2021
    Date of Patent: November 22, 2022
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Xuming Wu, Shengping Li, Lei Zhou, Xiaofei Zeng
  • Patent number: 11418261
    Abstract: A data transmission method includes steps described below. An optical line terminal (OLT) divides logical links supported by an optical network unit (ONU) into one or more logical link groups; and the OLT allocates a bandwidth to the logical link group of the ONU, so one or more logical links in the logical link group of the ONU share the bandwidth to transmit data.
    Type: Grant
    Filed: September 5, 2017
    Date of Patent: August 16, 2022
    Inventors: Weiliang Zhang, Yong Guo, Xingang Huang, Dan Geng
  • Patent number: 11349563
    Abstract: Provided are a communication monitoring method and a communication monitoring apparatus capable of an operation of identifying a coated optical fiber regardless of a propagation direction of an optical signal even before communication between an OLT and an ONU is opened.
    Type: Grant
    Filed: January 15, 2020
    Date of Patent: May 31, 2022
    Assignee: Nippon Telegraph and Telephone Corporation
    Inventors: Takui Uematsu, Hiroyuki Iida, Hidenobu Hirota, Naotsugu Ambe
  • Patent number: 11297404
    Abstract: An optical network includes top networking ports coupled to a packet switch, first media converters, second media converters, and bottom networking ports. The first media converters are coupled to top networking ports, each of the first media converters including a first ASIC transceiver that has a circuit switch function. The second media converters are coupled to the first media converter via optical cables to receive the optical signals. Each of the second media converters includes a second ASIC transceiver that has a circuit switch function. The bottom networking ports are coupled to the second media converters. The first ASIC transceiver and the second ASIC transceiver are configured to transmit a signal from one of the top networking ports to any one of the bottom networking ports, and transmit a signal from one of the bottom networking ports to any one of the top networking ports.
    Type: Grant
    Filed: July 16, 2020
    Date of Patent: April 5, 2022
    Assignee: Hewlett Packard Enterprise Development LP
    Inventors: Anu Mercian, Terrel Morris, Jean Tourrilhes, Derek Spock, Puneet Sharma
  • Patent number: 11258508
    Abstract: A transmitter can include a laser operable to output an optical signal; a digital signal processor operable to receive data and provide a plurality of electrical signals based on the data; and a modulator operable to modulate the optical signal to provide a plurality of optical subcarriers based on the plurality of electrical signals. One of the plurality of subcarriers carries first information indicative of a first portion of the data in a first time slot and second information indicative of a second portion of the data in a second time slot. The first information is associated with a first node remote from the transmitter and the second information is associated with a second node remote from the transmitter. A receiver as well as a system also are described.
    Type: Grant
    Filed: March 4, 2020
    Date of Patent: February 22, 2022
    Assignee: Infinera Corporation
    Inventors: Amir Jafari, Kuang-Tsan Wu, David F. Welch, Steven Joseph Hand, Mohamed Osman
  • Patent number: 11196488
    Abstract: To ensure the origination of an emergency call from a terminal device when a communication failure due to the continuous light-emission of an ONU occurs in a PON system, a PON system includes an OLT and a plurality of ONUs connected to the OLT through an optical branching device, where data is transmitted to the OLT by time-division multiplexing. The ONU includes an emergency call detection unit that detects an emergency call request from a telephone terminal, and an emergency call origination control unit that outputs, to the optical branching device, a disconnection request for disconnecting ONUs from the OLT when the emergency call request is detected and connection of the ONU to the OLT is not established. The optical branching device includes an optical line control unit that disconnects the ONUs from the OLT in response to the disconnection request.
    Type: Grant
    Filed: April 25, 2018
    Date of Patent: December 7, 2021
    Assignee: NEC Platforms, Ltd.
    Inventor: Hiroki Kurebayashi
  • Patent number: 10996415
    Abstract: Certain types of aggregation enclosures include cable input ports and downwardly angled cable output ports. A cover is pivotally coupled to the body so that the cover moves between an open position and a closed position. A modular component panel may be disposed within the enclosure. The component panel includes one or more distribution components (e.g., fiber distribution components or power distribution components) configured to connect at least a portion of an incoming cable to at least a portion of an outgoing cable.
    Type: Grant
    Filed: June 6, 2019
    Date of Patent: May 4, 2021
    Assignees: CommScope Connectivity Belgium BVBA, CommScope Connectivity UK Limited, ADC Czech Republic, s.r.o., CommScope Technologies LLC
    Inventors: Kristof Vastmans, Ian Miles Standish, Sven Schuemann, Eberhard Kahle, Juraj Marak, Pieter Arthur Anna De Vos
  • Patent number: 10958994
    Abstract: The present disclosure provides a method and a device for controlling a downlink optical signal in a passive optical network, and a computer-readable storage medium. The method includes: monitoring power of a downlink optical signal in a process of receiving the downlink optical signal; and adjusting an attenuation value of a variable optical attenuator at an ONU side according to the power of the downlink optical signal until the power of the downlink optical signal falls within a preset power range. The variable optical attenuator at the ONU side is located between an optical splitter and an ONU.
    Type: Grant
    Filed: September 21, 2018
    Date of Patent: March 23, 2021
    Assignee: ZTE CORPORATION
    Inventors: Wei Yang, Xingang Huang
  • Patent number: 10887289
    Abstract: Systems and methods for encryption in optical transport networks may include generating, at a first transponder, multiple encryption keys, each usable to encrypt a data payload in an OTN frame transmitted from the first transponder to a second transponder and storing the keys locally on the first and second transponders. The first transponder may randomly select one of the keys for encrypting a data payload of a given frame and set overhead encryption bits in a preceding frame indicating that the given frame is encrypted and identifying the randomly selected key. The first transponder may encrypt the data payload of the given frame using the randomly selected key prior to transmission. Based on the overhead bits in the preceding frame, the second transponder may decrypt the data payload of the given frame using the randomly selected key. A new key may be randomly selected for each encrypted frame.
    Type: Grant
    Filed: August 21, 2018
    Date of Patent: January 5, 2021
    Assignee: Fujitsu Limited
    Inventor: Muhammad Sakhi Sarwar
  • Patent number: 10771269
    Abstract: Automated intelligent node setup and configuration in a Hybrid Fiber-Coaxial (HFC) Network may be provided. First, a desired operating profile for a node connected in a Hybrid Fiber-Coaxial (HFC) network may be determined by a computing device. Next, based on the desired operating profile, a setting for at least one component in the node may be determined by the computing device. Then the at least one component in the node may be adjusted remotely by the computing device to the determined setting.
    Type: Grant
    Filed: March 9, 2018
    Date of Patent: September 8, 2020
    Assignee: Cisco Technology, Inc.
    Inventors: John Holobinko, John Alexander Ritchie, Jr., John Skrobko, Huang Ping
  • Patent number: 10700776
    Abstract: The present disclosure relates to methods and devices for processing a physical layer operations, administration, and maintenance (PLOAM) reset message. One example method includes receiving the PLOAM reset message comprising a reset level, the reset level comprising an indication of a component of an optical network unit (ONU) to be reset, and resetting the ONU according to the reset level.
    Type: Grant
    Filed: December 18, 2018
    Date of Patent: June 30, 2020
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Bo Gao, Yuanqiu Luo
  • Patent number: 10644825
    Abstract: A method of communication includes receiving, by an optical line terminal (OLT), a registration request from an optical network unit (ONU) through a specific upstream wavelength, assigning, by the OLT, out of a plurality of normal service upstream wavelengths and a plurality of normal service downstream wavelengths in a wavelength resource pool, a normal service upstream wavelength and a normal service downstream wavelength to the ONU for a normal service between the ONU and the OLT, and informing, through a specific downstream wavelength, the ONU of information regarding the normal service upstream wavelength and the normal service downstream wavelength. The specific downstream and upstream wavelengths are reserved for a registration process that includes receiving, through the specific upstream wavelength, the registration request and sending, through the specific downstream wavelength, the information regarding the normal service upstream wavelength and the normal service downstream wavelength.
    Type: Grant
    Filed: September 10, 2018
    Date of Patent: May 5, 2020
    Assignee: ZTE Corporation
    Inventors: Jun Shan Wey, Junwen Zhang
  • Patent number: 10601515
    Abstract: Embodiments of the present invention disclose a method for switching a modulation format of a passive optical network, an apparatus, and a system. The method includes: separately delivering, by an OLT, a registration message to an optical network unit in all supported upstream modulation formats and/or downstream modulation formats; receiving, by the OLT, a first message reported by the optical network unit, where the first message includes an upstream modulation format capability and/or a downstream modulation format capability; and determining, by the OLT, a target upstream modulation format and/or a target downstream modulation format of the optical network unit according to the first message, and instructing the optical network unit to switch to the target upstream modulation format and/or the target downstream modulation format. Therefore, in a PON system that supports a plurality of modulation formats, a modulation format reporting capability of the ONU is improved.
    Type: Grant
    Filed: August 3, 2018
    Date of Patent: March 24, 2020
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Shengping Li, Zhicheng Ye, Xuming Wu
  • Patent number: 10541774
    Abstract: Aspects of the present disclosure provide a technical solution that enables various passive optical network (PON) type infrastructures to coexist with dense wavelength division multiplexing (DWDM) network infrastructures. According to an embodiment, an optical communication network framework uses an optical coexistence topology to enable coexistence of PON type components and DWDM components. An optical coexistence system uses an optical coexistor to convey an upstream optical signal to one of an arrayed wave grating (AWG) of a DWDM system and an optical line terminal (OLT) of a PON by conveying unfiltered portions of the upstream optical signal to the OLT and filtered portions of the upstream optical signal to the AWG.
    Type: Grant
    Filed: September 18, 2017
    Date of Patent: January 21, 2020
    Assignee: COX COMMUNICATIONS, INC.
    Inventor: Yuxin Dai
  • Patent number: 10476625
    Abstract: Wavelength channels used in the optical network system are classified into downstream channels used to transmit optical signals from an optical line terminal (OLT) to an optical network unit (ONU) and upstream channels that are used to transmit optical signals from the ONU to the OLT. The wavelength channels are included in an O-band and may not overlap each other. One of the upstream channels are allocated to a wavelength band (for example, a zero-dispersion window) in which a four-wave mixing occurs. A wavelength spacing between the upstream channels and the downstream channels is determined based on a performance of separating the upstream channels and the downstream channels in a bidirectional optical sub assembly (BOSA) of the ONU. Also, a wavelength spacing between the downstream channels is determined based on a performance of separating the downstream channels in the BOSA.
    Type: Grant
    Filed: October 31, 2017
    Date of Patent: November 12, 2019
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Han Hyub Lee, Heuk Park, Hwan Seok Chung
  • Patent number: 10476714
    Abstract: Embodiments herein relate to a method performed by a radio-network node (12) for handling access to the radio-network node (12) from a wireless device (10) in the wireless communication network (1). The radio-network node determines one or more preamble configuration parameters indicating a length of a preamble for a physical random-access channel, PRACH, for the wireless device (10) based on one or more signal strength or quality measurements, and/or a load in the wireless communication network (1). The radio network node further transmits an indication of the determined one or more preamble configuration parameters to the wireless device.
    Type: Grant
    Filed: March 31, 2017
    Date of Patent: November 12, 2019
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Qiang Zhang, HÃ¥kan Andersson, Mattias Frenne, Johan Furuskog, Niclas Wiberg
  • Patent number: 10404373
    Abstract: Structures of a transmission apparatus and a reception apparatus using a mobile fronthaul that transmit and receive a frequency synchronization signal and a management control signal using at least one of in-band signaling and wavelength division multiplexing (WDM) in a single band or multiple bands of a mobile fronthaul using an intermediate frequency-over-fiber (IFoF) based analog transmission scheme.
    Type: Grant
    Filed: November 22, 2017
    Date of Patent: September 3, 2019
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventor: Minkyu Sung
  • Patent number: 10305594
    Abstract: An optical fiber-based cable is formed to include pre-manufactured wireless access nodes included at spaced-apart locations along a length of the optical fiber cable. Each wireless access node is formed to include an antenna, a wireless radio transceiver, and an optical transceiver. The cable is formed to include an optical transmission fiber (or fibers) and an electrical power conductor. The optical fiber(s) couples to the optical transceiver within each wireless access node, and a power conductor from the cable terminates at the node and is used to energize both the wireless transceiver and the optical transceiver. The antenna is preferably formed as a sheathing member around at least a portion of components forming the node. Upon deployment, the wireless node portion of the cable is able to provide communication between the cable and wireless devices in its vicinity.
    Type: Grant
    Filed: January 16, 2018
    Date of Patent: May 28, 2019
    Assignee: OFS FITEL, LLC
    Inventors: Mark A Boxer, John E George
  • Patent number: 10097269
    Abstract: A Passive Optical Networks (PONs) structure and a remote node in such a structure constituting at least a part of a backhaul network for supporting a Radio Access Network, in which a number of radio base stations are connected to optical networks units (ONUs) of said PONs structure. The ONUs of said PONs structure are grouped between separate PONs of said PONs structure. The ONUs of a separate PON are interconnected passively through a remote node of the PON in order to separate inter base station traffic of X2 interfaces from uplink and downlink data traffic of S1 interface heading from/to a core network via an optical line terminal (OLT). The remote node comprises of power splitter for enabling interconnection between ONUs of different PONs of said PONs structure.
    Type: Grant
    Filed: September 8, 2014
    Date of Patent: October 9, 2018
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Mozhgan Mahloo, Jiajia Chen, Lena Wosinska
  • Patent number: 10063312
    Abstract: A low-level reset message having a reset level provides a mechanism for an optical line terminal (OLT) to remotely reset a dysfunctional optical network unit (ONU). The reset message includes a reset level field which allows the OLT to instruct the ONU to perform a reset of some or all of its hardware and software components.
    Type: Grant
    Filed: June 20, 2017
    Date of Patent: August 28, 2018
    Assignee: Futurewei Technologies, Inc.
    Inventors: Bo Gao, Yuanqiu Luo
  • Patent number: 10056972
    Abstract: A low-level reset message having a reset level provides a mechanism for an optical line terminal (OLT) to remotely reset a dysfunctional optical network unit (ONU). The reset message includes a reset level field which allows the OLT to instruct the ONU to perform a reset of some or all of its hardware and software components.
    Type: Grant
    Filed: June 21, 2017
    Date of Patent: August 21, 2018
    Assignee: Futurewei Technologies, Inc.
    Inventors: Bo Gao, Yuanqiu Luo
  • Patent number: 10050712
    Abstract: A method and a device for determining a location of an optical splitter are provided. With the method, optical network units in a PON network are classified into K clusters based on locations of the optical network units with a K-means clustering-based algorithm. Distances between multiple optical network units in the same cluster are small. If it is determined that the number of the optical network units in each of the clusters does not exceed a threshold, a central office is added into the K clusters to obtain K new clusters; and for each of the new clusters, a location of an optical splitter corresponding to the new cluster is determined, so as to ensure that a sum of distances between the location of the optical splitter and locations of all elements in the new cluster is minimized.
    Type: Grant
    Filed: November 2, 2015
    Date of Patent: August 14, 2018
    Assignee: SOOCHOW UNIVERSITY
    Inventors: Gangxiang Shen, Hao Chen, Yongcheng Li
  • Patent number: 9813184
    Abstract: The invention relates to a method for establishing a communication channel, preferably an embedded control channel, between a central network node and at least one network unit to be integrated in a communication network including the central network node and an arbitrary but limited number of network units. The central network node is adapted to create and output a wavelength-division multiplex (WDM) downstream signal including downstream channel signals to be transmitted to the network units and to receive a WDM upstream signal including upstream channel signals created by the network units.
    Type: Grant
    Filed: September 17, 2015
    Date of Patent: November 7, 2017
    Assignee: Adva Optical Networking SE
    Inventors: Mirko Lawin, Stephan Pachnicke
  • Patent number: 9788270
    Abstract: A method of operating an optical-wireless access system, wherein an ONU obtains information on dynamic scheduling control of the optical-wireless access system, information on discontinuous reception control of the optical-wireless access system, or both of them, and such information is used in the ONU or transferred to an OLT and used as parameters of scheduling in the PON and sleep control.
    Type: Grant
    Filed: December 17, 2013
    Date of Patent: October 10, 2017
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Noriko Ilyama, Jun-ichi Kani, Naotaka Shibata
  • Patent number: 9621295
    Abstract: Methods, systems, and apparatus for overlaying a passive optical network on a legacy optical access network are disclosed. In one aspect a system includes a legacy optical access network in a copper loop plant. The legacy optical access network provides access to customer premises. The system also includes a gigabit passive optical network (GPON) that is overlaid on the legacy optical access network. A fiber is shared by the GPON and the legacy optical access network. The GPON can provide a plurality of channels on the shared fiber at wavelengths that are separate and independent of wavelengths of the legacy optical access network.
    Type: Grant
    Filed: November 21, 2013
    Date of Patent: April 11, 2017
    Assignee: ADTRAN, Inc.
    Inventors: Leif Sandstrom, Darrell Brown, Kevin Gregory Givens
  • Patent number: 9445287
    Abstract: An electronic device, a method, and a computer-readable medium. The electronic device includes a circuitry configured to receive a radio communication signal for another device, configured to determine, based on the radio communication signal, one or more features that can reflect the difference between an uplink transmission mode and a downlink transmission mode, and configured to judge whether the radio communication signal is for the uplink transmission or the downlink transmission according to the one or more features.
    Type: Grant
    Filed: September 29, 2012
    Date of Patent: September 13, 2016
    Assignees: Sony Corporation, Tsinghua University
    Inventors: Yu Rao, Wei Chen, Zhigang Cao, Xin Guo, Ryo Sawai, Ryota Kimura
  • Patent number: 9391697
    Abstract: A network element is disclosed. In accordance with some embodiments of the present disclosure, a network element may comprise a network interface configured to communicatively couple to a network, and a controller communicatively coupled to the network interface. The controller may be configured to determine a delay-measurement interval, and to perform a plurality of delay measurements at a respective plurality of randomly determined times within the delay-measurement interval. Performing a delay measurement may comprise sending an outgoing signal, receiving an incoming signal, and determining a delay time based on the outgoing signal and the incoming signal.
    Type: Grant
    Filed: April 2, 2013
    Date of Patent: July 12, 2016
    Assignee: Fujitsu Limited
    Inventors: Catherine Yuan, Vikas Mittal, Serdar Kiykioglu
  • Patent number: 9356700
    Abstract: Embodiments enable a half-duplex Time Division Duplex (TDD) mode for Ethernet Passive Optical Network (EPON) or EPON over Coax (EPoC) networks. Specifically, embodiments provide systems and methods for enabling an Optical Line Terminal (OLT)/Coaxial Line Terminal (CLT) to share a physical medium spectrum in time with the Optical Network Units (ONUs)/Coaxial Network Units (CNUs) that it services. In an embodiment, the OLT/CLT includes an EPON scheduler that can schedule downstream and upstream transmissions over the same physical medium spectrum. In another embodiment, the OLT/CLT is equipped with a burst mode transmit physical layer (PHY) module, which can be controlled by an EPON Medium Access Control (MAC) module, to transmit in burst mode over the physical medium. In a further embodiment, there is provided an ONU/CNU with a burst mode receive PHY module. The burst mode receive PHY module can maintain clock timing even with non-continuous reception from the OLT/CLT.
    Type: Grant
    Filed: May 31, 2013
    Date of Patent: May 31, 2016
    Assignee: Broadcom Corporation
    Inventor: Edward Boyd
  • Patent number: 9287981
    Abstract: An OLT, which is a station-side apparatus in a PON system, is connected to an ONU via an optical fiber. The OLT includes: an optical receiver which receives a burst signal from an ONU; a burst header detection unit which detects a certain delimiter pattern included in a received burst signal so as to establish synchronization of the burst signal; and a control unit which allows the burst header detection unit to perform detection of a delimiter pattern during a predicted reception period of a burst signal.
    Type: Grant
    Filed: February 6, 2013
    Date of Patent: March 15, 2016
    Assignee: FUJITSU LIMITED
    Inventors: Motoyuki Takizawa, Tetsuya Yokomoto, Koichi Seki, Takashi Ohira
  • Patent number: 9106335
    Abstract: Provided are an automatic wavelength recognition apparatus and method. The automatic wavelength recognition apparatus includes: a division unit receiving a single optical signal and dividing the received optical signal into a plurality of optical signals; a plurality of filter units filtering the optical signals and having different and wavelength-dependent pass characteristics; a plurality of detection units detecting the filtered optical signals and measuring intensities of the detected optical signals; at least one comparison unit comparing outputs of any two of the detection units; and a wavelength determination unit receiving an output of the at least one comparison unit and determining a wavelength of the above single optical signal using a pre-stored look-up table.
    Type: Grant
    Filed: June 29, 2012
    Date of Patent: August 11, 2015
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Sil-Gu Mun, Eun-Gu Lee, Dong-Min Seol, Eui-Suk Jung, Sang-Soo Lee, Jeong-Sik Cho
  • Patent number: 9100139
    Abstract: An optical system may include: a demultiplexer to receive an optical signal and to demultiplex the optical signal into a plurality of optical channels; a detector circuit to: receive the plurality of optical channels, and identify a predetermined channel identification trace tone frequency for an optical channel of the plurality of optical channels; and a receiver to: receive the optical channel with the identified predetermined channel identification trace tone frequency from the detector circuit, and process the optical channel.
    Type: Grant
    Filed: April 30, 2012
    Date of Patent: August 4, 2015
    Assignee: Juniper Networks, Inc.
    Inventors: Theodore J. Schmidt, Roberto Marcoccia
  • Patent number: 9094149
    Abstract: An arrangement is provided for transporting information from a central information distribution center (CIDC) to locations where such information is intended. Upon receiving a request for narrowcast information to be delivered to a node associated with a head end, the CIDC selects the requested information, generates an optical signal encoded with the requested information using information channels dedicated to narrowcast information transport for the node, and sends the optical signal to the head end via an optical fiber. When the head end receives the optical signal, the narrowcast information transport channels dedicated to the node are translated into subcarriers acceptable to the node before the requested narrowcast information is forwarded to the node.
    Type: Grant
    Filed: October 4, 2011
    Date of Patent: July 28, 2015
    Assignee: ARRIS Enterprises, Inc.
    Inventors: Irl N. Duling, Sandeep T. Vohra, Paul J. Matthews
  • Patent number: 9042728
    Abstract: An optical line termination node has a first connection arrangement for connecting a working fiber, a second connection arrangement for connecting a protection fiber, a transceiver arrangement having first primary link and a first secondary link, and protection switching means configured for being switched either in a working operating state or in a protection operating state.
    Type: Grant
    Filed: February 21, 2012
    Date of Patent: May 26, 2015
    Assignee: ADVA OPTICAL NETWORKING SE
    Inventor: Klaus Grobe
  • Patent number: 9031410
    Abstract: An optical network unit according to the present invention is provided as comprising a configuration that component units built therein are grouped for at least two sheets of substrate modules and arranged thereat. There are provided individual embodiments: (a) arranging an L2 layer and a part of the component unit of an L1 layer at a first substrate module, meanwhile, arranging the left part of the component unit of the L1 layer at a second substrate module; (b) arranging the component units of the L1 layer and of the L2 layer at the first substrate module and the second substrate module individually by grouping therefor; and (c) arranging the component units of the L2 layer and of the L1 layer at the first substrate module and the second substrate module respectively.
    Type: Grant
    Filed: March 6, 2013
    Date of Patent: May 12, 2015
    Assignee: Furukawa Electric Co., Ltd.
    Inventors: Kazutaka Shimoosako, Kunio Odaka, Katsuya Aboshi
  • Patent number: 9025956
    Abstract: A system for routing signals in a Distributed Antenna System includes a plurality of local Digital Access Units (DAUs) located at a Local location. Each of the plurality of local DAUs is coupled to each other and operable to route signals between the plurality of local DAUs. Each of the plurality of local DAUs includes one or more Base Transceiver Station (BTS) RF connections. Each of the plurality of BTS RF connections is operable to be coupled to one of one or more sectors of a BTS. The system also includes a plurality of remote DAUs located at a Remote location. The plurality of remote DAUs are coupled to each other and operable to transport signals between the plurality of remote DAUs.
    Type: Grant
    Filed: January 30, 2013
    Date of Patent: May 5, 2015
    Assignee: Dali Systems Co. Ltd.
    Inventors: Shawn Patrick Stapleton, Sasa Trajkovic
  • Patent number: 9020349
    Abstract: An arrangement at a Remote Node, a Remote Node, a Central Office, a WDM-PON and a method in an arrangement at a Remote Node, and a method in a Central Office are provided for supervision of the WDM-PON. The arrangement comprises at least one filter connected to the feeder fiber links and adapted to separate a data signal and an original OTDR signal received on either of the feeder fiber links. Further, the arrangement comprises a first splitter adapted to receive, from the at least one filter, the original OTDR signal, to split the original OTDR signal into a plurality of OTDR sub-signals and to output, to an N*M AWG, the plurality of OTDR sub-signals. The at least one filter is further adapted to output the original OTDR signal to the first splitter and to output the data signal to the AWG, thereby enabling supervision of the WDM-PON.
    Type: Grant
    Filed: March 28, 2012
    Date of Patent: April 28, 2015
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Jiajia Chen, Patryk Urban