公开(公告)号：US20220149953A1

公开(公告)日：2022-05-12

申请号：US17520370

申请日：2021-11-05

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

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

IPC: H04B10/61 ,  H04B10/077

Abstract: Disclosed are a function split structure for a mobile convergence optical transmission network and a method of providing coordinated multi-point technology using the same. The mobile convergence optical transmission network may include a centralized unit (CU), a distributed unit (DU) connected to the CU, a transport node (TN) of an optical transmission network connected to the DU via a first interface, an aggregated unit (AU) connected to a transport unit (TU) of the optical transmission network via the first interface, and a radio unit (RU) connected to the AU via a second interface corresponding to a split structure for a lower layer than the first interface.

公开(公告)号：US20190068307A1

公开(公告)日：2019-02-28

申请号：US15835717

申请日：2017-12-08

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

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

IPC: H04J3/16 ,  H04J14/02

Abstract: An optical line terminal (OLT) accumulates and stores a user frame for each physical layer identifier (PLID) to efficiently use a plurality of lanes used for downstream transmission from the OLT to an optical network unit (ONU). The OLT envelopes payloads that are accumulatively stored for the respective PLIDs based on a transmission rate supported by a corresponding ONU, combines an envelope header based on an envelope payload unit, and transmits an envelope frame. The OLT selects an available lane from among a plurality of lanes and may transmit the envelope frame through the selected lane.

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：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.

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：US20170126320A1

公开(公告)日：2017-05-04

申请号：US15337119

申请日：2016-10-28

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Seung Hyun CHO ,  Jong Hyun LEE ,  Hwan Seok CHUNG ,  Sun Me KIM

IPC: H04B10/2575 ,  H04B10/27

CPC classification number: H04B10/25754 ,  H04B7/0413

Abstract: A radio-over-fiber (RoF) transmission system includes at least one baseband unit (BBU) connected to a core network of a service provider that provides a mobile Internet service, an optical line terminal (OLT) configured to convert a radio signal received from the at least one BBU into an optical signal, an optical distribution network (ODN) comprising an optical fiber and an optical splitter, at least one optical network unit (ONU) configured to receive the optical signal from the OLT via the ODN and convert the optical signal into a radio signal, and at least one remote radio head (RRH) configured to receive the radio signal from the at least one ONU and output the radio signal via a plurality of antennas.

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：US20160285553A1

公开(公告)日：2016-09-29

申请号：US15079714

申请日：2016-03-24

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Seung Hyun CHO ,  Jong Hyun LEE ,  Hwan Seok CHUNG ,  Chan Gyo HAN

IPC: H04B10/2575

CPC classification number: H04B10/25753 ,  H04B10/25759

Abstract: An apparatus for transmitting a control signal in a radio-over-fiber (RoF)-based mobile fronthaul includes: a data channel transmitter configured to generate a data signal at a preassigned frequency or wavelength; a control channel transmitter configured to generate a control signal at a designated frequency or wavelength that is shared with other apparatuses; and a combiner configured to combine the data signal with the control signal.

Abstract translation: 一种用于在基于光纤无线（RoF）的移动前端中发送控制信号的装置包括：数据信道发射机，被配置为以预分配的频率或波长生成数据信号; 控制信道发射机，被配置为产生与其他设备共享的指定频率或波长的控制信号; 以及组合器，被配置为将数据信号与控制信号组合。

公开(公告)号：US20240244356A1

公开(公告)日：2024-07-18

申请号：US18510828

申请日：2023-11-16

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Yong Wook RA ,  Chansung PARK ,  Hwan Seok CHUNG

IPC: H04Q11/00 ,  H04B10/27

CPC classification number: H04Q11/0067 ,  H04B10/27 ,  H04Q2011/0086

Abstract: Provided are apparatus and method for slicing resources in passive optical network systems. The method includes identifying network elements included in a plurality of physical passive optical networks (pPONs), abstracting the identified network elements so that the identified network elements are recognized as the same software (SW) block, generating a plurality of PON slices by performing PON slicing on the abstracted network elements in accordance with a predetermined reference, and generating a plurality of virtual PONs (vPONs) by mapping the plurality of PON slices to at least one network element. The predetermined reference is determined on the basis of an attribute of at least one of ports and transmission containers (T-CONTs) corresponding to the identified network elements, and the at least one network element includes an optical network unit (ONU).