Electronics and Telecommunications Research Institute

Samsung Electronics Co., Ltd.

Korea Advanced Institute of Science and Technology

Medison Co., Ltd.

Mirae Corporation

Intellectual Discovery Co., Ltd.

Yong Sun Kim

Woo Yong Lee

Hyoung Jin Kwon

Seung Eun Hong

Kyeongpyo Kim

Jin Kyeong Kim

Hyun Kyu Chung

Kap Seok Chang

Sung Geun Jin

Kee Chang Lee

Hwa Sup Lim

Young Jo Ko

Byong Min Kang

Ouk Choi

Jae Sup Lee

Dongyong Lee

Cheol Sig Pyo

Young-Jo Ko

Kapseok Chang

Woo-Yong Lee

Jong Beom Ra

Kap-Seok Chang

Hyoung-Jin Kwon

Min Taig Kim

Il Gyu Kim

Seung Kyu Lee

Cheul Soon Kim

Do Kyoon Kim

Sang Ho Lee

Duhgoon Lee

Tae Joon Park

Nae-Soo Kim

Chang Sub Shin

Chi Young Ahn

Young-Chai Ko

Wun-Cheol Jeong

Cheol An Kim

Young Seuk Song

Hoyong Kang

Eun Ho Yang

Seung Yong Hwang

Juderk Park

Kyeong Pyo Kim

Eun-Hee Kim

Dae Gon Yun

Kyeong-pyo Kim

Hyo Chul Yun

Jong Hwa Choi

Keun Hyung Lee

Seung Ku Hwang

Dong Hoon Yu

Won Cheol Cho

Meejoung Kim

An operation method of a terminal in a communication system may comprise: receiving, from a first base station, information on preambles for random access; transmitting, to the first base station, a first message including a preamble selected based on the information on the preambles; receiving, from the first base station, a second message that is a response signal for the first message; transmitting, to the first base station, a third message requesting a preemptive use of the selected preamble during a first preemptive use period; and receiving, from the first base station, a fourth message allowing the preemptive use of the selected preamble during the first preemptive use period, and performing a random access procedure by using the selected preamble during the first preemptive use period.

Method and apparatus for acquiring and maintaining synchronization in communication systems

An operation method of a terminal in a communication system may comprise: receiving, from a base station, information on a command period of a sub-frame, information on an action period of the sub-frame, and information on a report period of the sub-frame; receiving, from the base station, a command in the command period; performing an action according to the received command in the action period; and reporting, to the base station, a result according to the action in the report period.

Method and apparatus for operating frame in factory automation system

An operation method of a first communication node in a communication system may include: generating a base sequence; performing a quadrature phase shift keying (QPSK) operation on the base sequence; generating a first signal sequence by performing a rotational transform operation by a first angle on a complex plane with respect to a result of the QPSK operation; modulating the first signal sequence to generate first modulation symbols; and transmitting a first signal composed of the first modulation symbols to a second communication node, wherein each of a plurality of elements constituting the first signal sequence has a real value or a pure imaginary value.

Method and apparatus for radio signal transmission and reception in communication system

A timing adjustment method performed by a terminal may include: acquiring downlink synchronization with a base station; obtaining, from the base station, TA granularity-related information; transmitting, to the base station, a preamble and/or an SRS; receiving, from the base station, a TA command generated based on the preamble and/or SRS; determining a timing for uplink frame transmission by interpreting the TA command based on a TA granularity determined based on the TA granularity-related information; and performing the uplink frame transmission based on the determined timing.

Method and apparatus for timing adjustment in mobile communication system

Provided is an apparatus and method for wideband short-range wireless communication using a directional antenna in a millimeter wave band, and the method for wideband short-range wireless communication according to an embodiment may determine a first time interval and a second time interval for a cooperated data frame transfer based on a packet transmission time at each transmission from a source node to a destination node, transmit a frame to a relay node through an antenna pattern directed towards the relay node at a start point of the first time interval, and transmit the frame to the destination node through an antenna pattern directed towards the destination node after a predetermined period of time from a start point of the second time interval.

Method for wideband short-range wireless communication using a directional antenna

A method and apparatus for erasing real object in augmented reality can be disclosed. The apparatus can receive an erasing area in the 3D augmented reality from a user, generate a 2D mask and a 3D mask corresponding to the erasing area, and generate a hole in the 3D augmented reality by using the 2D mask and the 3D mask. The apparatus can synthesize a first texture image for an hole area corresponding the hole by using a second texture image corresponding to an area excluding the 2D mask, calculate a first vertex value for the hole area by using a second vertex value corresponding to an area excluding the 3D mask, and perform inpainting on the hole are by using the first texture image and the first vertex value.

Method and apparatus for erasing real object in augmented reality

Disclosed are a method and an apparatus for transmitting and receiving a synchronization signal in a communication system. According to an exemplary embodiment of the present disclosure, a method of transmitting a first synchronization signal, performed by a base station in the communication system, may comprise generating a base sequence; generating a modified sequence by inverting polarity of the base sequence; mapping the base sequence and the modified sequence to a first frequency region having a frequency higher than a center subcarrier and a second frequency region having a frequency lower the center subcarrier, so that the base sequence and the modified sequence are symmetric centering the center subcarrier located at a center frequency of a frequency domain of the synchronization signal; and transmitting the synchronization signal comprising the base sequence and the modified sequence to a terminal. Therefore, performance of the communication system can be improved.

Method and apparatus for transmitting and receiving synchronizing signal in a communication system

Provided is a method and apparatus for setting a detour path in a wideband high frequency wireless system using a centralized Media Access Control (MAC) protocol. Here, in a wireless system using the centralized MAC protocol where a time synchronization and a band allocation may be performed by a single central control unit, when a signal blockage occurs while a data communication is being performed via a direct path between a source device and a destination device, the detour path may be quickly provided.

Method and apparatus for setting detour path in wideband high frequency wireless system using centralized MAC protocol

Provided is an apparatus and method for transmitting and receiving data using multiple paths in a wireless communication system using a distributed Media Access Control (MAC). More particularly, provided is an apparatus and method for transmitting and receiving data that may select a path with a better channel status from multiple paths that include a direct path using a Line of Sight (LOS) and a relay path passing through a relay apparatus, in a wireless communication system that may transmit data via the LOS using a distributed MAC and a directional antenna.

Apparatus and method for transmitting and receiving data using multi-path in wireless communication system of distributed MAC

Apparatus and method for broadband wireless local area communication

Provided is a communication method of a coordinator in a wireless networks system that uses a reservation-based media access control (MAC). The communication method includes receiving, from a source device, a frame that requests a reservation resource for a relay device, to enable a frame that the source device transmits to a destination device to be relayed via the relay device, and allocating the reservation resource for the relay device, in response to the request.

Communication method and frame structure for a coordinator device, source device and relay device in a wireless system

Methods for transmitting and receiving data of a station includes setting a direct route to a corresponding station and a relay route to a relay device, selecting one route as between the direct route and relay route, and transmitting and receiving data through the selected route. A non-transitory computer-readable storage medium may store a program including instructions to cause a computer to perform the method. The setting may be performed by a processor and the transmitting and receiving may be performed respectively by a transmitter and a receiver.

Apparatus and method for transmitting and receiving data in wireless communication system

Method and apparatus for setting detour path in wideband high frequency wireless system using centralized mac protocol

Growing community of inventors

Daejeon, South Korea

Yong Sun Kim