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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
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.
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公开(公告)号：US11742952B2
公开(公告)日：2023-08-29
申请号：US17871176
申请日：2022-07-22
Inventor： Han Hyub Lee , Hwan Seok Chung
IPC: H04J14/00 , H04B10/508 , H04B10/69 , H04B10/50 , H04B10/40
CPC classification number: H04B10/508 , H04B10/40 , H04B10/504 , H04B10/697
Abstract: Provided is a burst mode optical transmitter capable of preventing an optical signal from being output from a light source during burst mode disable time through an arithmetic circuit configured to remove an idle signal included in a MAC electrical signal by using a MAC electrical signal and a burst mode control signal.
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公开(公告)号：US11088774B2
公开(公告)日：2021-08-10
申请号：US16876439
申请日：2020-05-18
Inventor： Han Hyub Lee , Hwan Seok Chung
Abstract: A method and apparatus for wavelength allocation for bidirectional optical access. The wavelength allocation method sets a first central wavelength for the optical path terminal to perform downstream transmission to the optical network unit, and a second central wavelength for the optical network unit to perform upstream transmission to the optical network terminal. At this time, the first center wavelength and the second center wavelength are separated by a predetermined wavelength interval, and the first center wavelength is set larger than the second center wavelength.
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公开(公告)号：US09804327B1
公开(公告)日：2017-10-31
申请号：US15466405
申请日：2017-03-22
Inventor： Heuk Park , Sae Kyoung Kang , Hwan Seok Chung
CPC classification number: G02B6/12011 , G02B6/12016 , H04J14/02
Abstract: Provided is a phase error compensating apparatus. The phase error compensating apparatus may include a waveguide array disposed between a first free propagation region and a second free propagation region and configured to allow a light signal passed through the first free propagation region to move toward the second free propagation region, in which a length of each of the waveguides included in the waveguide array may be adjusted to compensate for a phase error of light signals passed through the waveguides.
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公开(公告)号：US12132525B2
公开(公告)日：2024-10-29
申请号：US17860219
申请日：2022-07-08
Inventor： Kwang Ok Kim , Kyeong Hwan Doo , Hwan Seok Chung
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.
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Patent Agency Ranking
16.发明授权公开(公告)号：US11233572B2
公开(公告)日：2022-01-25
申请号：US17103338
申请日：2020-11-24
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.
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17.发明授权公开(公告)号：US10735129B2
公开(公告)日：2020-08-04
申请号：US16208867
申请日：2018-12-04
Inventor： Kyeong Hwan Doo , Kwang Ok Kim , Hwan Seok Chung
IPC: H04B10/272 , H04J14/08 , H04J14/02 , H04Q11/00
Abstract: A bandwidth allocation apparatus and method for providing a low-latency service in an optical network that may guarantee low-latency requirements and improve a network utilization rate by allocating a static bandwidth to an ONU requiring low latency within an allocable bandwidth and by allocating a dynamic bandwidth to an ONU not requiring the low latency within a remaining bandwidth.
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公开(公告)号：US10461882B2
公开(公告)日：2019-10-29
申请号：US16203665
申请日：2018-11-29
Inventor： Han Hyub Lee , Hwan Seok Chung
Abstract: An optical network unit (ONU) for optical transmission in a burst mode includes an electro-absorption modulated laser (EML) transmitter including a laser diode (LD) and configured to transmit an uplink optical signal through the LD, an electro-absorption modulator (EAM) driver integrated circuit (IC) (EAM driver IC) configured to amplify an uplink data signal and provide the amplified data signal to the EML transmitter, an LD burst-mode driving circuit configured to control an operation of turning on or off the LD based on a burst-enable signal, and a media access control (MAC) configured to transmit the data signal to the EAM driver IC and transmit the burst-enable signal to the LD burst-mode driving circuit.
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公开(公告)号：US10461874B2
公开(公告)日：2019-10-29
申请号：US15835717
申请日：2017-12-08
Inventor： Kwang Ok Kim , Kyeong Hwan Doo , Hwan Seok Chung
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.
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20.发明授权公开(公告)号：US09998808B2
公开(公告)日：2018-06-12
申请号：US15288106
申请日：2016-10-07
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).
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