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    PASSIVE OPTICAL NETWORK SYSTEM USING TIME DIVISION MULTIPLEXING
    2.
    发明申请
    PASSIVE OPTICAL NETWORK SYSTEM USING TIME DIVISION MULTIPLEXING 审中-公开
    使用时分多路复用的被动光网络系统

    公开(公告)号：US20150055956A1

    公开(公告)日：2015-02-26

    申请号：US14469069

    申请日：2014-08-26

    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

    Inventor： Han Hyub LEE ,  Sang Soo LEE

    IPC: H04J14/08 ,  H04J14/02 ,  H04B10/27

    CPC classification number: H04B10/272 ,  H04B10/671 ,  H04J3/1694

    Abstract: Disclosed is a passive optical network system using a time division multiplexing scheme. According to one exemplary embodiment, the passive optical network system includes a plurality of optical network units (ONUs); an optical line terminal (OLT) to be connected to the plurality of ONUs for communication and to transmit and receive an optical signal to and from the plurality of ONUs using a time division multiplexing (TDM) scheme, wherein each of the plurality of ONUs includes a light source that generates an optical signal with a predetermined intensity even in burst-off state; and an optical filter disposed on a receiving path of an optical receiver of the OLT to filter out an optical noise signal received from an ONU in burst-off state among the plurality of ONUs.

    Abstract translation: 公开了一种使用时分复用方案的无源光网络系统。 根据一个示例性实施例，无源光网络系统包括多个光网络单元（ONU）; 要连接到用于通信的多个ONU的光线路终端（OLT），并且使用时分复用（TDM）方案向多个ONU发送光信号并从多个ONU接收光信号，其中多个ONU中的每一个包括 即使在爆裂状态下也产生预定强度的光信号的光源; 以及光学滤波器，其设置在所述OLT的光接收器的接收路径上，以在所述多个ONU中的突发关闭状态中滤出从ONU接收的光噪声信号。

    OPTICAL NETWORK SYSTEM USING WAVELENGTH CHANNELS INCLUDED IN O-BAND
    6.
    发明申请
    OPTICAL NETWORK SYSTEM USING WAVELENGTH CHANNELS INCLUDED IN O-BAND 审中-公开

    公开(公告)号：US20180123723A1

    公开(公告)日：2018-05-03

    申请号：US15798807

    申请日：2017-10-31

    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

    Inventor： Han Hyub LEE ,  Heuk PARK ,  Hwan Seok CHUNG

    IPC: H04J14/02 ,  H04B10/27 ,  H04B10/572

    CPC classification number: H04J14/0227 ,  H04B10/27 ,  H04B10/572 ,  H04J14/0241 ,  H04J14/0282 ,  H04J14/08

    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.

    METHOD OF DETERMINING PHYSICAL LAYER WAVELENGTH OF TUNABLE OPTICAL NETWORK UNIT (ONU) IN TIME AND WAVELENGTH DIVISION MULTIPLEXED PASSIVE OPTICAL NETWORK (TWDM-PON)
    7.
    发明申请
    METHOD OF DETERMINING PHYSICAL LAYER WAVELENGTH OF TUNABLE OPTICAL NETWORK UNIT (ONU) IN TIME AND WAVELENGTH DIVISION MULTIPLEXED PASSIVE OPTICAL NETWORK (TWDM-PON) 审中-公开
    在时间和波长部分确定可控光网络单元（ONU）的物理层波长的方法多路复用被动光网络（TWDM-PON）

    公开(公告)号：US20150055957A1

    公开(公告)日：2015-02-26

    申请号：US14469099

    申请日：2014-08-26

    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

    Inventor： Han Hyub LEE ,  Kwang Ok KIM ,  Sang Soo LEE

    IPC: H04J14/02 ,  H04J14/08

    CPC classification number: H04J14/0227 ,  H04J14/0239 ,  H04J14/0245 ,  H04J14/0246 ,  H04J14/0247 ,  H04J14/08

    Abstract: A method of determining a physical layer wavelength of a tunable optical network unit (ONU) in a time wavelength division multiplexing-passive optical network (TWDM-PON) is provided. First, a receiving wavelength of a tunable receiver is tuned to a downstream wavelength of one of a plurality of operable channels in a TWDM-PON system. Then, it is checked whether the tunable receiver maintains a state of loss of signal (LOS) for a predetermined period of time or the state of LOS is cleared. In response to a determination that the state of LOS is cleared, the ONU performs subsequent link establishment procedures in the channel, and in response to a determination that the state of LOS is maintained, the receiving wavelength of the tunable receiver is changed to a downstream wavelength of another channel.

    Abstract translation: 提供了一种在时分多路复用无源光网络（TWDM-PON）中确定可调谐光网络单元（ONU）的物理层波长的方法。 首先，可调谐接收机的接收波长被调谐到TWDM-PON系统中的多个可操作信道之一的下游波长。 然后，检查可调谐接收器是否在预定时间段内保持信号丢失（LOS）状态或者清除LOS的状态。 响应于确定LOS的状态被清除，ONU在该信道中执行后续链路建立过程，并且响应于确定LOS的状态的确定，可调接收机的接收波长被改变为下游 另一个通道的波长。

    MULTI-QUIET ZONE-BASED OPTICAL NETWORK UNIT REGISTRATION METHOD FOR LOW-LATENCY SERVICE
    8.
    发明申请
    MULTI-QUIET ZONE-BASED OPTICAL NETWORK UNIT REGISTRATION METHOD FOR LOW-LATENCY SERVICE 有权

    公开(公告)号：US20220123837A1

    公开(公告)日：2022-04-21

    申请号：US17367944

    申请日：2021-07-06

    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

    Inventor： Kwang Ok KIM ,  Kyeong Hwan DOO ,  Jung-yeol OH ,  Han Hyub LEE ,  Hwan Seok CHUNG

    IPC: H04B10/27

    Abstract: Disclosed is a method of registering a new optical network unit (ONU) to be performed by an optical line terminal (OLT). The method includes transmitting a ranging notification message to a centralized unit (CU)/distributed unit (DU) to register the new ONU, receiving scheduling information for registering the new ONU from the CU/DU in response to the ranging notification message, transmitting a serial number request message to a service region in which ONUs are present based on the received scheduling information, and when the serial number response message is received from the new ONU in response to the serial number request message, registering the new ONU that transmits a serial number request message. The transmitting of the serial number request message is performed through a multi-quiet zone of a short period.

    METHOD OF TUNING WAVELENGTH IN TIME AND WAVELENGTH DIVISION MULTIPLEXING-PASSIVE OPTICAL NETWORK (TWDM-PON)
    10.
    发明申请
    METHOD OF TUNING WAVELENGTH IN TIME AND WAVELENGTH DIVISION MULTIPLEXING-PASSIVE OPTICAL NETWORK (TWDM-PON) 有权
    时频波分复用无源光网络（TWDM-PON）

    公开(公告)号：US20150365191A1

    公开(公告)日：2015-12-17

    申请号：US14740480

    申请日：2015-06-16

    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

    Inventor： Han Hyub LEE ,  Kwang Ok KIM ,  Kyeong Hwan DOO ,  Sang Soo LEE

    IPC: H04J14/02 ,  H04L5/00 ,  H04J14/08

    CPC classification number: H04J14/0246 ,  H04J14/025 ,  H04J14/0256 ,  H04J14/0272 ,  H04J14/0282 ,  H04J14/08 ,  H04Q11/0067 ,  H04Q2011/0064

    Abstract: 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.

    Abstract translation: 提供了一种调整具有多个可操作通道的TWDM-PON中的波长的方法。 首先，添加第二信道作为其中至少第一信道正在工作的TWDM-PON的操作信道，然后通过第一信道向ONU提供业务的OLT请求ONU调谐到第二信道 渠道。 响应于接收到请求，ONU确定第二信道的下行波长是否已被记录在其上。 根据确定结果，ONU向OLT发送指示ONU能够执行波长调谐的ACK消息，然后开始向第二信道进行波长调谐，或者ONU向OLT发送NACK消息，该NACK消息指示 ONU无法进行波长调谐。

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