公开(公告)号：US20170222715A1

公开(公告)日：2017-08-03

申请号：US15398894

申请日：2017-01-05

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Won Kyoung LEE ,  Ho Geon KIM ,  Jeong-dong RYOO ,  Taesik CHEUNG ,  Bheom Soon JOO

IPC: H04B10/079 ,  H04J14/02

CPC classification number: H04B10/0791 ,  H04B10/27 ,  H04J3/14 ,  H04J14/0227 ,  H04J2203/0051 ,  H04J2203/006

Abstract: A method of localizing a defect location and a method of identifying a cause of a defect in an optical transport network (OTN). The method of localizing a defect location in an OTN includes generating tandem connection monitoring (TCM) coordinates consisting of a TCM level and trail information of an optical data unit (ODU) based on a relationship between an OTN line card (LC) and the ODU in the OTN, localizing the defect location in the OTN by converting the TCM level to a segment on the TCM coordinates, and identifying a root cause using a defect identification algorithm that traces back the cause of the defect in an opposite direction to that in which the defect is propagated based on an OTN layer structure.

公开(公告)号：US20230283563A1

公开(公告)日：2023-09-07

申请号：US18176879

申请日：2023-03-01

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Do Young KIM ,  Sun Me KIM ,  Taesik CHEUNG ,  Tae Kyu KANG ,  Jeong-dong RYOO ,  Yeoncheol RYOO ,  Chang-ho CHOI

IPC: H04L47/2483 ,  H04L45/302 ,  H04L43/106 ,  H04L69/22 ,  H04L47/28

CPC classification number: H04L47/2483 ,  H04L45/302 ,  H04L43/106 ,  H04L69/22 ,  H04L47/28

Abstract: An autonomous quality of service provisioning apparatus and method are disclosed. The apparatus includes a parameter extraction unit receiving a packet transmitted from a transmitting terminal and extracting QoS parameters by analyzing the received packet; and a quality of service reservation unit configured to be associated with a controller that manages and controls resources of the network to request the controller to reserve resources corresponding to the extracted QoS parameters.

公开(公告)号：US20170331727A1

公开(公告)日：2017-11-16

申请号：US15591237

申请日：2017-05-10

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Jeong-dong RYOO ,  Taesik CHEUNG

IPC: H04L12/703 ,  H04L12/707

CPC classification number: H04L45/28 ,  H04L45/22

Abstract: A protection switching method and apparatus using operator's command in a dual-node interconnection-based protection switching. An operation method of a third end node receives an operator's command for selecting one of a working path and a protection path in a protection domain, receives information about an isolation status of a second end node and the third end node in an adjacent recovery domain connected through the second end node connected to the working path and the third end node connected to the protection path, determines whether to connect to the second end node based on information about the isolation status, delivers traffic to a path determined based on the operator's command and whether to connect to the second end node, and transfers, to the second end node, information about a connectivity decision including whether to connect to the second end node.

公开(公告)号：US20170111213A1

公开(公告)日：2017-04-20

申请号：US15294705

申请日：2016-10-15

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Jeong-dong RYOO ,  Taesik CHEUNG ,  Kyung Gyu CHUN

IPC: H04L12/24 ,  H04L12/703 ,  H04L12/721 ,  H04L12/26

CPC classification number: H04L41/0659 ,  H04L41/0213 ,  H04L41/0663 ,  H04L43/0811 ,  H04L45/28 ,  H04L45/70

Abstract: A linear protection switching-based domain connecting method includes determining, by a protection interconnecting node, a user traffic transceiving path based on information on a presence or absence of defect in working paths and protection paths, generating working path control information and protection path control information based on information on the determined user traffic transceiving path and the information on the presence or absence of the defect in the protection paths, and transmitting the generated working path information to the working interconnecting node, and connecting two paths among the protection paths, and the connection path based on the protection path control information.

公开(公告)号：US20140219080A1

公开(公告)日：2014-08-07

申请号：US14168079

申请日：2014-01-30

Applicant: Electronics and Telecommunications Research Institute

Inventor： Daeub KIM ,  Taesik CHEUNG ,  Jeong-dong RYOO

IPC: H04L12/24

CPC classification number: H04L45/28 ,  H04L45/22

Abstract: In a multi-domain network in which at least one working interconnected node and at least one protection interconnected node are formed between a first service end node and a second service end node, when a failure has occurred in both a working transport entity and a first protection transport entity of a node, a node having recognized a failure performs switching to a second protection transport entity that is connected to a corresponding interconnected node.

Abstract translation: 在其中在第一服务端节点和第二服务端节点之间形成至少一个工作互连节点和至少一个保护互连节点的多域网络中，当在工作传输实体和第一服务端节点中发生故障时， 节点的保护传输实体，识别到故障的节点对连接到相应的互连节点的第二保护传输实体进行切换。

公开(公告)号：US20240267322A1

公开(公告)日：2024-08-08

申请号：US18423454

申请日：2024-01-26

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Taesik CHEUNG ,  Jeong-dong RYOO

IPC: H04L45/28 ,  H04L41/0663 ,  H04L45/00

CPC classification number: H04L45/28 ,  H04L41/0663 ,  H04L45/22

Abstract: Provided are a network device for encoding automatic protection switching (APS) information and an operating method of the same. The operating method includes monitoring a state of a working path and, when a failure is detected on the working path, encoding network failure information for activating a protection path on an APS channel and transmitting the network failure information to another network device. The APS channel is divided into a plurality of fields. The plurality of fields includes a first field corresponding to at least one of failure state information and request state information, and the first field may be a field corresponding to protection type information.

公开(公告)号：US20130272128A1

公开(公告)日：2013-10-17

申请号：US13755788

申请日：2013-01-31

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Kwang-Koog LEE ,  Jeong-dong RYOO

IPC: H04L12/56

CPC classification number: H04L47/12 ,  H04L12/437 ,  H04L45/122 ,  H04L45/124 ,  H04L45/125 ,  H04L2012/421

Abstract: An apparatus of determining blocking in an Ethernet ring network sets blocking with respect to each of the plurality of links in an Ethernet ring network, and determines one of the plurality of links as a link to be blocked by using traffic request amounts of a plurality of service flows with respect to the respective links set to be blocked.

Abstract translation: 以太网环网中确定​​阻塞的装置针对以太网环网中的多个链路中的每一个设置阻塞，并且通过使用多个链路中的业务请求量来确定多个链路中的一个链路被阻塞 服务流程相对于设置为被阻止的各个链接。

公开(公告)号：US20130083652A1

公开(公告)日：2013-04-04

申请号：US13630539

申请日：2012-09-28

Applicant: Electronics and Telecommunications Research Institute

Inventor： Taesik CHEUNG ,  Jeong-dong RYOO

IPC: H04L29/14 ,  H04L12/56

CPC classification number: H04L45/28 ,  H04L45/22

Abstract: A method of performing protection switching in which congestion does not occur at a shared segment and that can rapidly perform linear protection switching while using an 1-phase automatic protection switching protocol is provided. An end node that requests protection switching awaits by a time that is previously set to a timer and stops use of a shared protection segment for a standby time of the end node and thus traffic that is injected to a shared node reduces, whereby a congestion situation of a shared protection segment does not occur and thus a protection switching protocol is prevented from abnormally operating.

Abstract translation: 提供一种执行保护切换的方法，其中在共享段处不发生拥塞并且可以在使用一相自动保护切换协议时快速执行线性保护切换。 请求保护切换的终端节点等待一段时间，该时间先前设置为定时器，并停止对终端节点的待机时间的共享保护段的使用，因此注入到共享节点的流量减少，从而出现拥塞情况 的共享保护段不会发生，从而防止保护交换协议异常操作。