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公开(公告)号：US11515948B2
公开(公告)日：2022-11-29
申请号：US17520370
申请日：2021-11-05
发明人： Jung-yeol Oh , Kwang Ok Kim , Kyeong Hwan Doo , Han Hyub Lee , Hwan Seok Chung
IPC分类号： H04B10/61 , H04B10/077
摘要： 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.
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公开(公告)号：US11569911B2
公开(公告)日：2023-01-31
申请号：US17367944
申请日：2021-07-06
发明人： Kwang Ok Kim , Kyeong Hwan Doo , Jung-yeol Oh , Han Hyub Lee , Hwan Seok Chung
IPC分类号： H04B10/27
摘要： 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.
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公开(公告)号：US10827240B2
公开(公告)日：2020-11-03
申请号：US16503766
申请日：2019-07-05
发明人： Hwan Seok Chung , Kyeong Hwan Doo , Han Hyub Lee , Kwang Ok Kim
摘要： 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.
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4.发明授权Method of tuning wavelength in time and wavelength division multiplexing-passive optical network (TWDM-PON) 有权波长调谐方法和波分复用无源光网络（TWDM-PON）公开(公告)号：US09525507B2
公开(公告)日：2016-12-20
申请号：US14740480
申请日：2015-06-16
发明人： Han Hyub Lee , Kwang Ok Kim , Kyeong Hwan Doo , Sang Soo Lee
CPC分类号： H04J14/0246 , H04J14/025 , H04J14/0256 , H04J14/0272 , H04J14/0282 , H04J14/08 , H04Q11/0067 , H04Q2011/0064
摘要： 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.
摘要翻译： 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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公开(公告)号：US11800263B2
公开(公告)日：2023-10-24
申请号：US17741997
申请日：2022-05-11
发明人： Hwan Seok Chung , Kyeong Hwan Doo
IPC分类号： H04Q11/00 , H04W72/0446 , H04B10/11
CPC分类号： H04Q11/0062 , H04B10/11 , H04W72/0446 , H04Q2011/0086
摘要： Provided are a method of bandwidth allocation for transmitting mobile data and a network device. The bandwidth allocation method includes receiving a cooperative transport interface (CTI) message including a traffic pattern corresponding to a CTI pattern identification (ID) from a distributed unit (DU) of a mobile network, and allocating a bandwidth for transmitting mobile data based on the traffic pattern included in the CTI message.
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公开(公告)号：US11770341B2
公开(公告)日：2023-09-26
申请号：US17865572
申请日：2022-07-15
发明人： Kyeong Hwan Doo , Kwang Ok Kim , Han Hyub Lee , Hwan Seok Chung
IPC分类号： H04L47/2491 , H04W28/02 , H04L47/20 , H04W28/20 , H04L47/11 , H04W72/543 , H04W28/08
CPC分类号： H04L47/2491 , H04L47/115 , H04L47/20 , H04W28/0278 , H04W28/20 , H04W72/543 , H04W28/0983
摘要： 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.
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公开(公告)号：US10673523B2
公开(公告)日：2020-06-02
申请号：US16140966
申请日：2018-09-25
发明人： Jung Yeol Oh , Kwang Ok Kim , Kyeong Hwan Doo
IPC分类号： H04B10/079 , H04B10/27 , H04L12/24
摘要： 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.
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公开(公告)号：US09692647B2
公开(公告)日：2017-06-27
申请号：US14843282
申请日：2015-09-02
发明人： Jun Seong Bang , Kyeong Hwan Doo
CPC分类号： H04L41/0816 , H04L41/0813 , H04Q11/0067 , H04Q2011/0064
摘要： A method of registering or de-registering, by an optical line terminal (OLT), one or more optical network units (ONUs) in an optical communications network. The method may include: setting one or more sub-channels for registration or de-registration among two or more sub-channels, and a size of a contention window in the one or more sub-channels; transmitting, to one or more ONUs, a registration information message including information of the one or more set sub-channels and the size of the contention window; receiving, through one of the set sub-channels, a registration or de-registration request message from the one or more ONUs, which receive the registration information message; and registering and de-registering the one or more ONUs.
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9.发明申请CLOUD BASE STATION IN FIXED-MOBILE CONVERGED ACCESS NETWORK AND OPERATION METHOD THEREOF 审中-公开固定移动通信接入网络中的云台基站及其操作方法公开(公告)号：US20140003819A1
公开(公告)日：2014-01-02
申请号：US13930320
申请日：2013-06-28
发明人： Seung Hyun Cho , Seung Il Myong , Kyeong Hwan Doo , Jie Hyun Lee , Sang Soo Lee , Jong Hyun Lee
IPC分类号： H04W72/04
CPC分类号： H04W72/04 , H04L5/0007 , H04L5/0028 , H04L5/0044 , H04L5/0048 , H04L5/006 , H04L25/022 , H04L25/0228 , H04L27/2602 , H04L27/265 , H04L27/2655 , H04L27/2697 , H04L27/3405 , H04L27/3455
摘要： Disclosed is a cloud base station in an orthogonal frequency division multiplexing (OFDM)-based fixed-mobile converged access network and an operation method thereof. The cloud base station may include a physical (PHY) layer unit to perform a quadrature amplitude modulation (QAM) of a parallel signal received from a media access control (MAC) layer per subcarrier, and an optical orthogonal frequency division multiplexing (OFDM) transceiver to transform the QAM modulated subcarriers into a time domain to generate an OFDM sample per subcarrier, add a cyclic prefix (CP) and control information to for operating an enhanced radio unit (eRU) to the OFDM sample per subcarrier to generate a downstream signal, and transmit the downstream signal.
摘要翻译： 公开了一种基于正交频分复用（OFDM）的固定移动融合接入网络中的云基站及其操作方法。 云基站可以包括用于执行从每个子载波的媒体访问控制（MAC）层接收的并行信号的正交幅度调制（QAM）的物理（PHY）层单元，以及光学正交频分复用（OFDM）收发器 将QAM调制的子载波变换成时域以产生每个子载波的OFDM样本，添加循环前缀（CP）和控制信息，以用于对每个子载波的OFDM样本操作增强型无线电单元（eRU）以生成下行信号， 并发送下行信号。
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10.发明授权公开(公告)号：US11212600B2
公开(公告)日：2021-12-28
申请号：US16952794
申请日：2020-11-19
发明人： Kyeong Hwan Doo , Kwang Ok Kim , Jung-yeol Oh , Han Hyub Lee , Hwan Seok Chung
摘要： 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.
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