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    System and methods for time and frequency division passive optical network
    1.
    发明授权
    System and methods for time and frequency division passive optical network 有权

    公开(公告)号：US12107668B1

    公开(公告)日：2024-10-01

    申请号：US18217582

    申请日：2023-07-02

    Applicant: CABLE TELEVISION LABORATORIES, INC.

    Inventor： Junwen Zhang ,  Zhensheng Jia ,  Mu Xu ,  Haipeng Zhang ,  Luis Alberto Campos

    IPC: H04J14/02

    CPC classification number: H04J14/0282 ,  H04J14/0246 ,  H04J14/0247 ,  H04J14/025

    Abstract: A coherent passive optical network includes a downstream transceiver and first and second upstream transceivers in communication with an optical transport medium. The downstream transceiver includes a downstream processor for mapping a downstream data stream to a plurality of sub-bands, and a downstream transmitter for transmitting a downstream optical signal modulated with the plurality of sub-bands. The first upstream transceiver includes a first local oscillator (LO) for tuning a first LO center frequency to a first sub-band of the plurality of sub-bands, and a first downstream receiver for coherently detecting the downstream optical signal within the first sub-band. The second upstream transceiver includes a second downstream receiver configured for coherently detecting the downstream optical signal within a second sub-band of the plurality of sub-bands. The downstream processor dynamically allocates the first and second sub-bands to the first and second transceivers in the time and frequency domains.

    System and methods for coherent burst reception
    5.
    发明授权
    System and methods for coherent burst reception 有权

    公开(公告)号：US11575448B1

    公开(公告)日：2023-02-07

    申请号：US17401473

    申请日：2021-08-13

    Applicant: CABLE TELEVISION LABORATORIES, INC.

    Inventor： Junwen Zhang ,  Luis Alberto Campos ,  Zhensheng Jia

    IPC: H04B10/61

    Abstract: An optical network communication system utilizes a coherent passive optical network (PON). The system includes an optical line terminal (OLT) having a downstream transmitter and an upstream receiver system configured for time-wavelength division coherent detection. The system further includes a splitter in operable communication with the OLT, and a plurality of optical network units (ONUs) in operable communication with the splitter. Each of the plurality of ONUs is configured to (i) receive downstream coherent burst signals from the OLT, and (ii) transmit at least one upstream burst signal to the OLT. The upstream receiver system further includes a power control module and a local oscillator (LO) configured to generate an optical LO signal The power control module is configured to adaptively control, in real-time, a power level of the optical LO signal.

    Photonics assisted millimeter-wave systems and methods
    6.
    发明授权
    Photonics assisted millimeter-wave systems and methods 有权

    公开(公告)号：US11563508B1

    公开(公告)日：2023-01-24

    申请号：US17498442

    申请日：2021-10-11

    Applicant: CABLE TELEVISION LABORATORIES, INC.

    Inventor： Mu Xu ,  Ruoyu Sun ,  Balkan Kecicioglu ,  Junwen Zhang ,  Haipeng Zhang ,  Zhensheng Jia ,  Luis Alberto Campos

    IPC: H04J14/02 ,  H04Q11/00 ,  H04B10/11 ,  H04B10/2575

    Abstract: A communications network includes a central communication unit, an optical transport medium, and a plurality of remote radio base stations. The central communication unit generates, within a selected millimeter-wave frequency band, a plurality of adjacent two-tone optical frequency conjugate pairs. Each conjugate pair includes a first optical tone carrying a modulated data signal, and a second optical tone carrying a reference local oscillator signal. The optical transport medium transports the plurality of two-tone conjugate pairs to the plurality of radio base stations, and each base station receives at least one conjugate pair at an optical front end thereof. The optical front end separates the first optical tone from the second optical tone, and converts the first optical tone into a millimeter-wave radio frequency electrical signal. The base station further includes a radio antenna system for wirelessly transmitting the millimeter-wave radio frequency electrical signal to at least one wireless receiving device.

    SYSTEM AND METHODS FOR COHERENT BURST RECEPTION
    8.
    发明申请
    SYSTEM AND METHODS FOR COHERENT BURST RECEPTION 审中-公开

    公开(公告)号：US20200044747A1

    公开(公告)日：2020-02-06

    申请号：US16530838

    申请日：2019-08-02

    Applicant: CABLE TELEVISION LABORATORIES, INC

    Inventor： Junwen Zhang ,  Luis Alberto Campos ,  Zhensheng Jia

    IPC: H04B10/61

    Abstract: An optical network communication system utilizes a coherent passive optical network (PON). The system includes an optical line terminal (OLT) having a downstream transmitter and an upstream receiver system configured for time-wavelength division coherent detection. The system further includes a splitter in operable communication with the OLT, and a plurality of optical network units (ONUs) in operable communication with the splitter. Each of the plurality of ONUs is configured to (i) receive downstream coherent burst signals from the OLT, and (ii) transmit at least one upstream burst signal to the OLT. The upstream receiver system further includes a power control module and a local oscillator (LO) configured to generate an optical LO signal The power control module is configured to adaptively control, in real-time, a power level of the optical LO signal.

    Bandwidth allocation method and associated optical line terminal
    10.
    发明授权
    Bandwidth allocation method and associated optical line terminal 有权

    公开(公告)号：US12095512B1

    公开(公告)日：2024-09-17

    申请号：US18211482

    申请日：2023-06-19

    Applicant: CABLE TELEVISION LABORATORIES, INC.

    Inventor： Haipeng Zhang ,  Junwen Zhang ,  Jingjie Zhu ,  Mu Xu ,  Zhensheng Jia

    IPC: H04B10/69 ,  H04B10/516

    CPC classification number: H04B10/6932 ,  H04B10/5161

    Abstract: A method for allocating bandwidth to a first ONU, a second ONU, M1 ONUs, and M2 ONUs includes, during an allocation cycle, (i) granting a respective upstream time slot to, of a plurality of N ONUs, only each of the M1 ONUs, and (ii) granting a first upstream time slot to the first ONU. Each of the M1 ONUs and M2 ONUs is one of the plurality of N ONUs. The method also includes, during a subsequent cycle, (i) granting a respective upstream time slot to, of the plurality of N ONUs, only each of the M2 ONUs. The N ONUs includes a skipped-ONU that is one of either, and not both, the M1 ONUs and the M2 ONUs. The method includes, during the subsequent allocation cycle, granting a second upstream time slot to a second ONU, which is not one of the plurality of N ONUs.

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