公开(公告)号：US11515948B2

公开(公告)日：2022-11-29

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：US11770341B2

公开(公告)日：2023-09-26

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 ,  H04L47/20 ,  H04W28/20 ,  H04L47/11 ,  H04W72/543 ,  H04W28/08

CPC classification number: H04L47/2491 ,  H04L47/115 ,  H04L47/20 ,  H04W28/0278 ,  H04W28/20 ,  H04W72/543 ,  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：US10673523B2

公开(公告)日：2020-06-02

申请号：US16140966

申请日：2018-09-25

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Jung Yeol Oh ,  Kwang Ok Kim ,  Kyeong Hwan Doo

IPC: H04B10/079 ,  H04B10/27 ,  H04L12/24

Abstract: A traffic control method and apparatus for solving service quality degradation caused by traffic overhead in a specific node, on which traffic is concentrated in the specific node because of traffic congestion in a software defined network (SDN) environment. A traffic control method to be performed by an SDN controller of an SDN environment includes: collecting real-time traffic state information of a network; detecting traffic overhead of at least one node on the basis of the collected real-time traffic state information; determining whether network resources are available to the at least one node where the traffic overhead is detected; and changing a service level agreement (SLA)-based bandwidth allowable capacity with regard to the at least one node in accordance with available network resources.

公开(公告)号：US09137850B2

公开(公告)日：2015-09-15

申请号：US13729582

申请日：2012-12-28

Applicant: Electronics and Telecommunications Research Institute

Inventor： Kwang Ok Kim ,  Seung Il Myong ,  Sang Soo Lee ,  Jong Hyun Lee

IPC: H04W88/06 ,  H04L27/26 ,  H04L5/00

CPC classification number: H04W88/06 ,  H04L5/0091 ,  H04L27/2602

Abstract: A wired/wireless converged media access control (MAC) adaptor and a method for transmitting a frame using the same. The wired/wireless converged MAC adaptor may include a service network interface (SNI) to transmit a MAC frame corresponding to a wired or wireless service, or common public radio interface (CPRI) data, a frame conversion unit to convert, into an orthogonal frequency division multiplexing (OFDM) frame, a wired/wireless converged MAC frame having a common frame structure of the MAC frame corresponding to the wired or wireless service or the CPRI data, and an OFDM interface configured to transmit the OFDM frame to an optical OFDM modem by dynamically allocating sub-carriers based on data transmission characteristics.

Abstract translation: 有线/无线融合媒体访问控制（MAC）适配器以及使用该适配器发送帧的方法。 有线/无线融合MAC适配器可以包括用于发送对应于有线或无线服务的MAC帧的服务网络接口（SNI）或公共无线电接口（CPRI）数据，将转换成正交频率的帧转换单元 分割复用（OFDM）帧，具有与有线或无线服务或CPRI数据相对应的MAC帧的公共帧结构的有线/无线融合MAC帧以及被配置为将OFDM帧发送到光OFDM调制解调器的OFDM接口 通过基于数据传输特性动态分配子载波。

公开(公告)号：US11212600B2

公开(公告)日：2021-12-28

申请号：US16952794

申请日：2020-11-19

Applicant: Electronics and Telecommunications Research Institute

Inventor： Kyeong Hwan Doo ,  Kwang Ok Kim ,  Jung-yeol Oh ,  Han Hyub Lee ,  Hwan Seok Chung

IPC: H04Q11/00 ,  H04J14/02 ,  H04J14/08

Abstract: An integrated dynamic bandwidth allocation method and apparatus in a passive optical network (PON) are provided. The bandwidth allocation method performed by an optical line terminal (OLT) includes generating a service level agreement (SLA) table including an SLA required for calculation for bandwidth allocation corresponding to at least one service queue included in at least one optical network unit (ONU) connected to the OLT, calculating maximum allocatable bandwidths for respective predetermined cycles based on the generated SLA table, and, when a service queue requiring bandwidth allocation is present in the ONU, performing bandwidth allocation according to different bandwidth allocation methods based on a priority level of the service queue using the calculated maximum allocatable bandwidths.

公开(公告)号：US10110979B2

公开(公告)日：2018-10-23

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

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：US11569911B2

公开(公告)日：2023-01-31

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.

公开(公告)号：US10827240B2

公开(公告)日：2020-11-03

申请号：US16503766

申请日：2019-07-05

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Hwan Seok Chung ,  Kyeong Hwan Doo ,  Han Hyub Lee ,  Kwang Ok Kim

IPC: H04B10/00 ,  H04Q11/00 ,  H04J14/08 ,  H04J14/00

Abstract: A cooperative dynamic bandwidth allocation (CO-DBA) method in a structure in which a mobile network and an optical access network are combined allows the mobile network and the optical access network to share mobile scheduling information in advance and allocate bandwidths in advance, and thus prevent a latency in upstream transmission of mobile traffic.

公开(公告)号：US09525507B2

公开(公告)日：2016-12-20

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 ,  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：US12132525B2

公开(公告)日：2024-10-29

申请号：US17860219

申请日：2022-07-08

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Kwang Ok Kim ,  Kyeong Hwan Doo ,  Hwan Seok Chung

IPC: H04B10/80 ,  H04B10/27

CPC classification number: H04B10/80 ,  H04B10/27

Abstract: Provided are a power management method and apparatus of an ONU supporting a slicing function. A power management method performed by a power management apparatus of an ONU supporting a slicing function includes receiving a first message for discovering a power management attribute of an ONU including at least one slice from an optical line terminal (OLT), transmitting a second message including the power management attribute of the ONU to the OLT in response to the first message received, receiving a third message for setting up a power management parameter for each slice included in the ONU from the OLT, setting up the power management parameter for each slice included in the ONU based on the third message received, and transmitting a fourth message including a set up result of the power management parameter for each slice included in the ONU to the OLT.