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。

公开(公告)号：US20150055955A1

公开(公告)日：2015-02-26

申请号：US14468694

申请日：2014-08-26

Applicant: Electronics and Telecommunications Research Institute

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

IPC: H04J14/02 ,  H04L7/00 ,  H04B10/60 ,  H04J14/08

CPC classification number: H04J14/0239

Abstract: The invention presents the channel management technology in a Time and Wavelength Division Multiplexing-Passive Optical network (TWDM-PON). According to an exemplary embodiment, the channel management technology is a wavelength management method for an Optical Network Unit (ONU) having a tunable receiver in the TWDM-PON in which a service is provided through multiple channels, the wavelength management method including: setting a wavelength of the tunable receiver as a first channel to receive a physical synchronization signal from an Optical Line Terminal (OLT); extracting either or both service utilization information and service operator information from the physical synchronization signal; and based on either or both of the service utilization information and the service operator information, determining whether to perform follow-up procedures for activation via the first channel or whether to change the wavelength of the tunable receiver into a second channel.

Abstract translation: 本发明提出了时分波分复用无源光网络（TWDM-PON）中的信道管理技术。 根据示例性实施例，信道管理技术是在TWDM-PON中具有可调谐接收机的光网络单元（ONU）的波长管理方法，其中通过多个信道提供业务，所述波长管理方法包括： 作为从光线路终端（OLT）接收物理同步信号的第一信道的可调谐接收机的波长; 从物理同步信号中提取服务使用信息和服务运营商信息中的一个或两个; 并且基于所述服务利用信息和所述服务运营商信息中的一个或两者，确定是否执行经由所述第一信道的激活的后续过程或者是否将所述可调谐接收机的波长改变为第二信道。

公开(公告)号：US20130170834A1

公开(公告)日：2013-07-04

申请号：US13728089

申请日：2012-12-27

Applicant: Electronics and Telecommunications Research Institute

Inventor： Seung-Hyun CHO ,  Jie Hyun LEE ,  Seung Il MYONG ,  Sang Soo LEE ,  Jong Hyun LEE ,  Eui Suk JUNG ,  Kwang Ok KIM

IPC: H04J14/02

CPC classification number: H04J14/0278 ,  H04J14/02 ,  H04J14/0246 ,  H04J14/0247 ,  H04J14/025 ,  H04J14/0252 ,  H04J14/0282 ,  H04J14/0298 ,  H04J2014/0253

Abstract: Provided is a hybrid passive optical network (PON) system. The hybrid PON system of wavelength division multiplexing (WDM)/time division multiplexing (TDM) may include an optical line terminal (OLT) and an optical network unit (ONU). The OLT and the ONU may transmit a signal based on wavelength reuse using a seed light source and a reflective modulator. The light source may include a seed light source having a single wavelength, two seed light sources having different wavelength bands, and a light source having a wavelength tunable characteristic.

Abstract translation: 提供了一种混合无源光网络（PON）系统。 波分复用（WDM）/时分复用（TDM）的混合PON系统可以包括光线路终端（OLT）和光网络单元（ONU）。 OLT和ONU可以使用种子光源和反射调制器来发射基于波长重用的信号。 光源可以包括具有单个波长的种子光源，具有不同波长带的两个种子光源和具有波长可调特性的光源。

公开(公告)号：US20230164083A1

公开(公告)日：2023-05-25

申请号：US17865572

申请日：2022-07-15

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Kyeong Hwan DOO ,  Kwang Ok KIM ,  Han Hyub LEE ,  Hwan Seok CHUNG

IPC: H04L47/2491 ,  H04W28/02 ,  H04W72/08 ,  H04L47/11 ,  H04L47/20 ,  H04W28/20

CPC classification number: H04L47/2491 ,  H04W28/0278 ,  H04W72/087 ,  H04L47/115 ,  H04L47/20 ,  H04W28/20 ,  H04W28/0983

Abstract: Provided are an apparatus and a method for allocating a bandwidth for providing a low-latency fronthaul service in a passive optical network. An bandwidth allocating method performed by a bandwidth allocating apparatus included in an OLT includes receiving an actual report message requesting bandwidth allocation from at least one ONU for wired subscribers connected to the OLT, receiving radio scheduling information for at least one ONU for mobile connected to the OLT from a central unit (CU)/digital unit (DU), generating a virtual report message using the radio scheduling information received from the CU/DU, allocating a transmission bandwidth for the at least one ONU for wired subscribers and the at least one ONU for mobile through the received actual report message and the generated virtual report message, and transmitting the allocated transmission bandwidth to the ONU for wired subscribers and the ONU for mobile using a grant message.

公开(公告)号：US20210159984A1

公开(公告)日：2021-05-27

申请号：US17103338

申请日：2020-11-24

Applicant: Electronics and Telecommunications Research Institute

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

IPC: H04B10/27

Abstract: Disclosed is a slice connection method of an optical access network and an optical access network system for slice connection. A slice connection method performed by an optical network unit (ONU) of an optical access network system may include determining a service type of a host device transmitting a service connection request, determining a slice based on the service type, sending a request for connection to the slice to an optical line terminal (OLT), and relaying data transmission and reception between the OLT and the host device when a slice connection response corresponding to the request is received from the OLT.

公开(公告)号：US20180035183A1

公开(公告)日：2018-02-01

申请号：US15398841

申请日：2017-01-05

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Kwang Ok KIM ,  Kyeong Hwan DOO ,  Hwan Seok CHUNG

IPC: H04Q11/00 ,  H04B10/27

CPC classification number: H04Q11/0067 ,  H04Q2011/0064 ,  H04Q2011/0088

Abstract: A method of registering an optical network unit (ONU) in an optical line terminal (OLT). The OLT determines a lane to be used by the ONU based on a transmission rate supported by the ONU, combines or distributes data of a dataflow based on a rate of the lane by comparing the rate of the lane to a rate of the dataflow of a media access control (MAC) client interface, and, when the OLT and the ONU are connected through multiple lanes, transmits and receives data between the OLT and the ONU through channel bonding for more effective use of a network.

公开(公告)号：US20170105061A1

公开(公告)日：2017-04-13

申请号：US15288106

申请日：2016-10-07

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Kwang Ok KIM ,  Hwan Seok CHUNG

IPC: H04Q11/00 ,  H04L12/721

CPC classification number: H04Q11/0067 ,  H04L45/26 ,  H04Q11/0003 ,  H04Q2011/0047 ,  H04Q2011/0064 ,  H04Q2011/0081 ,  H04Q2011/0086

Abstract: An optical line terminal (OLT) and an optical network unit (ONU) configured to generate a plurality of fragments by fragmenting a media access control (MAC) frame and to transmit the plurality of generated fragments, when a length of the MAC frame is greater than or equal to a maximum transmission unit (MTU).

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。

公开(公告)号：US20130170837A1

公开(公告)日：2013-07-04

申请号：US13729638

申请日：2012-12-28

Applicant: Electronics and Telecommunications Research Institute

Inventor： Kwang Ok KIM ,  Seung-Hyun CHO ,  Jie Hyun LEE ,  Seung Il MYONG ,  Sang Soo LEE ,  Jong Hyun LEE

IPC: H04J14/08

CPC classification number: H04J14/08 ,  H04Q11/0005 ,  H04Q2011/0064

Abstract: A converged passive optical network (CPON) and a data transmission method are disclosed. The CPON is a combination of a time division multiple access-passive optical network (TDMA-PON) and an orthogonal frequency division multiple access-passive optical network (OFDMA-PON) and is able to dynamically controlling a bandwidth for upstream signal transmission through allocation of multiple subcarriers to each single optical network unit (ONU).

Abstract translation: 公开了一种融合无源光网络（CPON）和数据传输方法。 CPON是时分多址无源光网络（TDMA-PON）和正交频分多址无源光网络（OFDMA-PON）的组合，能够通过分配动态地控制上行信号传输的带宽 的多个子载波到每个单个光网络单元（ONU）。

公开(公告)号：US20130170830A1

公开(公告)日：2013-07-04

申请号：US13729521

申请日：2012-12-28

Applicant: Electronics and Telecommunications Research Institute

Inventor： Seung Hyun CHO ,  Jie Hyun LEE ,  Kwang Ok KIM ,  Eui Suk JUNG ,  Seung Il MYONG ,  Sang Soo LEE ,  Jong Hyun LEE

IPC: H04B10/27

CPC classification number: H04B10/27 ,  H04B10/272 ,  H04B10/564 ,  H04B17/103 ,  H04B17/15

Abstract: A modulation method of an optical modem and a signal transmission apparatus performing the method are disclosed. The modulation method of the optical modem includes an optical interface providing a signal to a light source, a photo detector receiving reflected light by an optical link when output light from the light source based on the provided signal is reflected by the optical link, the photo detector measuring and determining characteristics of the optical link using the reflected light, and the optical modem determining a power level and a modulation method for each subcarrier based on the characteristics of the optical link.

Abstract translation: 公开了一种光调制解调器的调制方法和执行该方法的信号传输装置。 光调制解调器的调制方法包括向光源提供信号的光接口，当基于提供的信号的来自光源的输出光被光链路反射时，光接收器接收由光链路反射的光的光检测器，照片 检测器使用反射光测量和确定光链路的特性，并且光调制解调器基于光链路的特性确定每个子载波的功率电平和调制方法。