Electronics and Telecommunications Research Institute

Newracom, Inc.

Kyeongpyo Kim

Woo Yong Lee

Yong Sun Kim

Hyoung Jin Kwon

Jin Kyeong Kim

Seung Eun Hong

Hyun-Kyu Chung

Woo-Yong Lee

Kap-Seok Chang

Hyoung-Jin Kwon

Hyun Kyu Chung

Dongyong Lee

Jae Sup Lee

Young-Jo Ko

Kapseok Chang

Wooram Shin

Ilgu Lee

Min Taig Kim

Cheol Sig Pyo

Nae-Soo Kim

Young-Chai Ko

Dae Kyun Lee

Jongee Oh

Seung Yong Hwang

Jeongchul Shin

HyunSang Park

Young Ro Kim

Jong Hwa Choi

Seung Ku Hwang

A data transmission method of a source node in a cooperative communication system includes: performing a beamforming to a relay node; transmitting data to the relay node; performing a beamforming to a destination node; and transmitting data to the destination node.

Method for transmitting and receiving data in cooperative communication system, and cooperative communication method

An operation method of a base station in a communication system may include: performing an operation for channel measurement between the base station and a terminal; determining a size of multiple spreading resource blocks configured in a second two-dimensional (2D) domain based on a result of the channel measurement; transmitting information indicating the size of the multiple spreading resource blocks to the terminal; and performing a communication procedure with the terminal based on the multiple spreading resource blocks having the size.

Method and apparatus for modulation and demodulation of signal in communication system

An operation method of a first communication node may include: mapping data symbols to be transmitted to a second communication node of the communication system to resources in a first two-dimensional (2D) domain; pre-processing the data symbols mapped to the resources in the first 2D domain to spread the data symbols on resources in a second 2D domain; mapping the pre-processed data symbols to the resources in the second 2D domain; and performing multi-carrier modulation on the data symbols mapped to the resources in the second 2D domain for each of the resources in the second 2D domain.

Method and apparatus for signal modulation and demodulation in wireless 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

The present invention relates to an apparatus and method for transmitting/receiving streaming data using multiple paths, in which the streaming data is smoothly reproduced without being interrupted, and more particularly, to an apparatus and method for transmitting/receiving streaming data using multiple paths, in which exchange of the streaming data is performed in real-time using the multiple paths regardless of obstacles. The method for transmitting streaming data using multiple paths includes managing and maintaining a path list including sequence information about a transmission path capable of transmitting data, framing the streaming data, and transmitting the framed streaming data via the transmission path according to the sequence information.

Apparatus and method for transmitting and receiving streaming data using multiple paths

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

A method of operating a network coordinator for a spatial reuse scheme includes receiving a reservation request for a time period for a data communication of a target transmitter/receiver pair that uses a directional antenna, searching for a time period reserved in advance for another transmitter/receiver pair, from a Channel Time Allocation Period (CTAP) that is a contention-free access period for the data communication, and reserving a time period for the target transmitter/receiver pair in the CTAP, so that the time period reserved for the target transmitter/receiver pair overlaps the time period reserved in advance for the other transmitter/receiver pair.

Network employing space recycling, and a method for managing the network

A method for transmitting frames of a device in a wireless local area network (WLAN) includes generating a symbol in which legacy cyclic prefixes are periodically located and transmitting a frame including the symbol, wherein the symbol includes a data duration excluding cyclic prefix in symbol duration, and the length of the data duration is longer than 3.2 us.

Method for transmitting frame, clear channel assessment method, and apparatus implementing the same method

Method for sending and receiving data on a cooperative communications system and a cooperative communications method

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Daejeon, South Korea

Kyeongpyo Kim