Electronics and Telecommunications Research Institute

Intellectual Discovery Co., Ltd.

Hark Yoo

Geun Yong Kim

Sung Chang Kim

Dong Soo Lee

Dongsoo Lee

Mun Seob Lee

Youngsuk Lee

Young Suk Lee

Jong Deog Kim

Hee Do Kim

Jae In Kim

Sung-Chang Kim

Young Sun Kim

Dong-Soo Lee

Geun-Yong Kim

Jai Sang Koh

Kwang-Ok Kim

Sim-Kwon Yoon

Kyeong-Hwan Doo

Dong-soo Lee

Bin-yeong Yoon

Man-soo Han

Mun-seob Lee

Chor Won Kim

Byung Hee Son

Ryang Soo Kim

Bong-Tae Kim

Byung-Tak Lee

Jai-sang Koh

Yong-tae Kim

Bin-Yeong Yoon

Jong-Deog Kim

Moon Kyun Oh

Sung-hoon Kwak

Mun-Seob Lee

Sim Kwon Yoon

Geun-yong Kim

Jae-In Kim

Jong-deog Kim

Bong-kyu Kim

Yongseok Yoo

Le Quan

Gi Ha Yoon

Hee-Do Kim

Byung-Hee Son

Young-Suk Lee

Disclosed is an adaptive deep learning inference system that adapts to changing network latency and executes deep learning model inference to ensure end-to-end data processing service latency when providing a deep learning inference service in a mobile edge computing (MEC) environment. An apparatus and method for providing a deep learning inference service performed in an MEC environment including a terminal device, a wireless access network, and an edge computing server are provided. The apparatus and method provide deep learning inference data having deterministic latency, which is fixed service latency, by adjusting service latency required to provide a deep learning inference result according to a change in latency of the wireless access network when at least one terminal device senses data and requests a deep learning inference service.

Adaptive deep learning inference apparatus and method in mobile edge computing

Provided are a system and method for providing a microservice-based device control interface. The system for providing a microservice-based device control interface includes a Docker registry server in which resources required for providing a device control interface are located and a gateway which receives and installs resources and provides a device control interface using a Docker-based microservice structure.

System and method for providing microservice-based device control interface

A terminal status monitoring apparatus connected to a terminal at an optical subscriber side in an optical network is provided. A signal transferring unit transfers a downlink optical signal to the terminal and receives, as a reflected optical signal, the downlink optical signal which is reflected at the terminal. A signal receiving unit measures an intensity of the reflected optical signal. A signal processing unit determines a connection status of a terminal device at the terminal by comparing an intensity of the downlink optical signal with the intensity of the reflected optical signal. A signal output unit outputs the connection status.

Apparatus and method for monitoring status of terminal

A method and an apparatus for setting a quiet window in a passive optical network system are provided. A first response time from a time after an optical line terminal (OLT) transmits a serial number request up to a time in which the OLT receives a first response signal to the serial number request is measured, and a second response time up to a time in which the OLT receives a final response signal to the serial number request is measured. In addition, distance information of an optical network unit (ONU) including the first response time and the second response time is acquired.

Method and apparatus for setting quiet window in passive optical network system

Disclosed herein are a handheld device and method for measuring the quality of an optical link, which are capable of simultaneously measuring the strength of an optical signal and the quality of an optical link at an optical network terminal in a Fiber-to-the-Home (FTTH) network. A presented handheld device for measuring a quality of an optical link includes an optical signal input port for receiving an optical signal, an optical power measurement unit for measuring a power of the optical signal, an output unit for outputting one or more of a measured power value of the optical signal and results of quality measurement of an optical link, based on interworking with an optical network terminal, and a control unit for storing the measured power value of the optical signal and performing a process for quality measurement of the optical link.

Handheld device and method for measuring quality of optical link

Disclosed is a method and an apparatus for selecting a wavelength in a hybrid Passive Optical Network (PON) system. The method of selecting a wavelength by a wavelength selecting apparatus in a hybrid passive optical network system includes: performing synchronization with any one of a plurality of downstream wavelengths; when the synchronization is succeeded, determining whether to select the synchronized downstream wavelength for a registration to an optical line terminal; and when it is determined to select the synchronized downstream wavelength, performing the registration to the optical line terminal through the synchronized downstream wavelength.

Method and apparatus for selecting wavelength in hybrid passive optical network system

Disclosed are a method and system for determining and controlling power of an optical transmitter of an optical network unit (ONU) for a time and wavelength division multiplexing passive optical network (TWDM-PON). The system includes an RSSI collector configured to collect received signal strength indication (RSSI) information from upstream optical signals received from the ONUs connected to optical line terminal (OLT) ports, an ONU power level determiner configured to gather the pieces of RSSI information about the ONUs from the RSSI collector, and to determine power of optical transmitters of the ONUs based on the gathered information, and a power mode controller configured to receive power mode setting information of the optical transmitters of the ONUs from the ONU power level determiner, and to generate a physical layer operation and maintenance (PLOAM) message to control power modes of the ONUs based on the received power mode setting information.

Method and system for determining and controlling power of optical transmitter of optical network unit for time and wavelength division multiplexing passive optical network

Disclosed herein are an optical network unit and a method for controlling the unit. In a passive optical network system, an optical transceiver of the optical network unit performs a wavelength change of an optical signal according to a wavelength setting command transferred from a media access control (MAC) unit and monitors a wavelength change state and reports the monitored wavelength change state to the MAC unit. When the wavelength malfunction occurs, the MAC unit blocks an uplink optical transmission of the optical transceiver.

Optical network unit and method for controlling the unit

A fast protection switching method for a Passive Optical Network (PON). When performing protection switching from an operation link (an operation network) to a protection link (a protection network) in a PON, the fast protection switching method enables rapidly updating Equalization Delay (EqD) values, even if the EqD values are different for Optical Network Terminals (ONTs) of varying distances.

Fast protection switching method for passive optical network

Provided is a method of saving power in a passive optical network (PON) system including an optical line terminal (OLT) and a plurality of optical network units (ONUs), the OLT including an optical transceiver to communicate with at least one ONU through an optical line, and a controller to control the optical transceiver to transmit an upstream bandwidth map to the ONU at a predetermined transmission interval, wherein the transmission interval is determined based on a desired upstream data service delay time.

Method of controlling optical network unit (ONU) in sleep mode

Disclosed herein is an apparatus and method for detecting an optical line fault in a Passive Optical Network (PON). The apparatus includes an optical distribution unit configured to, when a multiplexed signal of a downstream light signal and a monitoring light signal is input, distribute the multiplexed signal to an Optical Network Unit (ONU) of a first optical path and to a second optical path. An optical layer management unit is installed in the second optical path and is configured to set a time at which the monitoring light signal of the multiplexed signal provided to the second optical path is received to a starting time of monitoring light measurement, compare a monitoring light signal reflected and returned from the ONU with a signal pattern obtained when no fault occurs, and then determine whether a fault has occurred in a distribution network.

Apparatus and method for detecting optical line fault in passive optical network

Provided is an OLT including a wavelength splitter that splits all upstream optical signals with different wavelengths received from at least one ONU according to wavelength, at least one receiver that receive the optical signals split by the wavelength splitter according to wavelength, a wavelength selector that allocates an upstream transmission wavelength of the at least one ONU, and a transmitter that transmits wavelength allocation information allocated by the wavelength selector to the at least one ONU.

Wavelength selection and configuration method for multi-wavelength optical communication system

An optical line terminal is provided which includes an upward band allocating unit configured to send an upward bandwidth allocation map to an optical network unit and to determine a sleep mode of the optical network unit according to whether a response message corresponding to the upward bandwidth allocation map is received; and an alarm unit configured to determine an upward bandwidth allocation map transfer operation as a normal operation according to an operation of the sleep mode.

Optical line terminal and optical network unit for supporting sleep mode thereof

An optical network system for controlling a passive optical network (PON) in which at least one symmetric optical subscriber terminal and at least one asymmetric optical subscriber terminal coexist is provided.

Optical network system and method for controlling optical network system

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Gwangju, South Korea

Hark Yoo