Samsung Electronics Co., Ltd.

Electronics and Telecommunications Research Institute

Research & Industrial Cooperation Group

Icu Research Industrial Cooperation Group

Information and Communications University Educational Foundation

Min Ho Kang

Byoung Whi Kim

Jung Yul Choi

Jin Su Park

Dong Zo Kim

Keum Su Song

Chan Woo Park

Nam Uk Kim

Doo Suk Kang

Bo Kun Choi

Tae Yeon Kim

Jeong Ju Yoo

Ji Hwan Kim

Jong Mu Choi

June Koo Rhee

Se Ho Park

Jea Hoon Yu

Byung Sung Kim

Jun Hak Lim

Hyuek Jae Lee

Sun Key Lee

Yong Hyub Won

Han Seok Park

Min Soo Kim

Young Mi Ha

Hyun Ho Yun

Jin Hyun Park

Yong Deok Jeong

Jae Gwan Kim

Hark Yoo

Bok Rae Jung

Won Tae Chae

Ye Ji Yoon

Kang Ho Byun

An apparatus for changing a wireless charging mode includes a power receiving antenna configured to receive power from a power supply using a first frequency band, a communication circuit configured to communicate with the power supply using a second frequency band, a power management circuit configured to charge a battery using the received power, and a control circuit configured to be electrically connected with the power management circuit. In addition, various embodiments ascertained through the specification are possible.

Apparatus and method for altering wireless charging mode

An electronic device includes a housing, a wireless communication circuit, a wired communication interface, a processor, and a memory. The memory stores instructions that, when executed, cause the processor to connect with an external device by using the wireless communication circuit or the wired communication interface, to receive first information to set the electronic device as an access point (AP) from the external device, to receive second information on another AP from the external device, to configure the electronic device by using the first information, and to wirelessly broadcast a signal by using the wireless communication circuit, to allow wireless devices to connect to the AP.

Method and apparatus for managing wireless router and device connected thereto

Provided is an apparatus for transferring optical data in an optical switching system using time synchronization. The apparatus performs time synchronization on optical data to input the optical data at regular intervals through fiber delay line for time synchronization respectively disposed on input ports. Therefore, the apparatus can efficiently reduce a data blocking rate in comparison with a conventional optical switching system using an asynchronous electric buffer without a synchronous process, and achieve the same performance as conventional asynchronous technology despite using fewer wavelength converters and buffers, thus reducing system cost. In addition, using dynamic time synchronization modules, the apparatus performs time synchronization for minute time variation due to an environment such as temperature.

Apparatus for transferring optical data in optical switching system using time synchronization

A method for improving power saving performance of a mobile station in an IEEE 802.16e system is provided. The method includes a first process for determining whether a synchronization condition is satisfied, the synchronization condition being that a service connection newly requested to switch to a sleep mode is low QoS insensitive to delay and there are one or fewer service connection that is in a sleep mode and whose connection type is high QoS sensitive to delay among other service connections; a second process of transmitting to a base station a sleep request message for equalizing a start time of a sleep mode of the service connection to a start time of a next sleep interval of a service connection already in the sleep mode, matching a minimum sleep interval of the service connection to the next sleep interval of the service connection already in the sleep mode, and matching a maximum sleep interval of the service connection to a maximum sleep interval of the service connection already in the sleep mode, for sleep-mode synchronization among a plurality of service connections in a mobile station when the synchronization condition is satisfied; and a third process for switching the service connection to a sleep mode indicated by the sleep request message upon receipt of a sleep response message from a base station in response to the sleep request message.

Scheduled power-saving method in IEEE 802.16e system

In an apparatus and method for transferring data bursts in an optical burst switching network, a control module connected between demultiplexers and multiplexers obtains information in control packets of data bursts to sort and confirm service classes of the data bursts according to delay time and blocking rate. A switching unit switches the data bursts to an output port of a corresponding destination node. A first buffer delays data bursts from the control module once by a preset delay time according to output resource availability and sends them to the output port when the data bursts are sensitive to delay time. A second buffer circulates and delays the sorted and confirmed data bursts up to a preset limit according to output resource availability and then sends the data bursts to the output port when the data bursts are insensitive to delay time.

Apparatus and method for transferring data bursts in optical burst switching network

The present provides a method of dynamically managing multicast groups and allocating multicast service wavelengths for the highest channel efficiency. According to the present invention, the share indices of wavelengths of all multicast service groups, which employ broadcasting wavelengths and data wavelengths, are periodically ascertained on the basis of IGMP snooping-based technology in a WDM-PON. Based on the ascertainment results, if the channel share index of the group that employs the broadcasting wavelength is smaller than the channel share index of the group that employs the data wavelength, the share index of the wavelength of the multicast group that employs the broadcasting wavelength is maximized by dynamically changing allocation of the wavelength of the multicast group, so that a maximum multicast service can be provided within limited resources.

Dynamic multicast group management and service wavelength allocation method for communication-broadcasting convergence service in WDM-PON

A method for transmitting a packet in a wireless access network based on a wavelength identification code scheme. The method comprises the steps of connecting n number of RNCs (Radio Network Controllers) to one sub-ring where the 'n' is a positive integer, and assigning a unique wavelength to each RNC; identifying a packet to be transmitted between the RNCs located within a same sub-ring using the assigned unique wavelength, and transmitting the packet through an SRC (Sub-Ring Controller); connecting m number of SRCs to one main-ring where the 'm' is a positive integer, and assigning a unique wavelength to each SRC; and detaching a wavelength identification code from the packet to be transmitted between the RNCs located within different sub-rings, and transmitting the packet having the encapsulated wavelength identification code through an MRC (Main-Ring Controller).

Method for transmitting packet in wireless access network based on wavelength identification code scheme

Disclosed are an apparatus and method for converting the wavelength of an optical signal using a multi-mode Fabry-Perot laser diode. The apparatus controls polarization of an external pump optical signal to output a TE polarized pump optical signal, and controls polarization of a probe optical signal to output a TM polarized probe optical signal. The apparatus couples the TM polarized probe optical signal and TE polarized pump optical signal irrespective of the polarization of the optical signals. The apparatus finely controls the polarization of the pump optical signal and the polarization of the probe optical signal such that they conform to TE and TM modes of the Fabry-Perot laser diode, respectively. The Fabry-Perot laser diode injection-locks the TE polarized pump optical signal of the coupled signal to change the position of a TM mode absorption null (a point at which an output optical signal has the minimum intensity), to thereby convert the wavelength of the TE polarized pump optical signal to the wavelength of the TM polarized probe optical signal. Accordingly, a wide wavelength conversion band is provided, and inverting and non-inverting wavelength conversions are easily carried out.

Optical wavelength conversion apparatus and method using injection locking of fabry-perot laser diode

Growing community of inventors

Seoul, South Korea

Min Ho Kang