Electronics and Telecommunications Research Institute

Korea Advanced Institute of Science and Technology

Intellectual Discovery Co., Ltd.

University-industry Cooperation Group of Kyung Hee University

Ajou University Industry-academic Cooperation Foundation

Dongguk University Industry-academic Cooperation Foundation

Chung, Hyun Kyu

Hyun Kyu Chung

Woo Yong Lee

Seung Eun Hong

Hyoung Jin Kwon

Yong Sun Kim

Kap Seok Chang

Sung Geun Jin

Sung-Geun Jin

Kapseok Chang

Jin Kyeong Kim

Seong Rag Kim

Myung Don Kim

Young-Hoon Kim

Kyeongpyo Kim

Junyoung Nam

Jae Joon Park

Il Gyu Kim

Taegyun Noh

Won Sop Kim

Sok-Kyu Lee

Jae Young Ahn

Byung Jang Jeong

Heesoo Lee

Joon Ho Cho

Bangwon Seo

Yun Joo Kim

Heon Kook Kwon

Woo Young Lee

Chul Sik Yoon

Seung Chan Bang

Kwang Jae Lim

Hoon Ki Lee

Min Byeong Lee

Byung-Jae Kwak

Jae Sun Cha

Yong June Kim

Chung Gu Kang

Minuk Kim

Seung Joon Lee

Sung Woo Choi

Jung Jae Yu

Juyul Lee

Bing Hui

Junhyeong Kim

Ki Chul Han

Young-Su Kim

Byung-Jang Jeong

Jubum Kim

Yun Hee Kim

Pal G Bergan

Seong Keun Oh

Byung Jae Kwak

Dae Jun Chang

Jun Young Nam

Jinup Kim

Eun Ae Lee

Don Sung Oh

Kyeong Pyo Kim

Hye Kyung Jwa

Dae Woon Lim

Hyojin Lee

Hyun Seok Ryu

Young Yun Kang

Minjoong Rim

Min Joong Lim

Jeong Min Kwak

Phill-Seung Lee

SoonHung Han

Yong-Yook Kim

Kook-Jin Choi

Sang-Il Kim

Young-Hee Cho

Sung Kyo Kang

Ho Yun Kim

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 scheduling method of giving a chance for transmission to a plurality of terminals in the same time period, and a device therefor are provided. The scheduling method includes: transmitting first scheduling information to terminals in a network, the first scheduling information defining transmitting/receiving terminals and a transmission time period; receiving channel measurement information including inter-terminal interference information from the terminals in the network; and generating second scheduling information defining transmission time periods and a plurality of transmitting/receiving terminals that do not interfere with each other by using the channel measurement information.

Scheduling method and apparatus for spatial reuse

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

An apparatus and method for beam-forming communication in a mobile wireless backhaul network. The apparatus included in a base station includes: an antenna unit radiating a beam according to predetermined beam characteristics and transmitting a signal of the base station to a mobile terminal in a high speed moving body; a position searching unit detecting a distance, a speed, and a direction of movement between the base station and the mobile terminal; a beam setting unit grouping one or more beams according to the detected distance between the base station and the mobile terminal and setting the number of beam search groups in which a beam search is to be performed and a beam search period according to the detected speed and direction of movement; and a beam searching unit searching for the beam of the mobile terminal based on beam setting values set by the beam setting unit.

Apparatus and method for beam-forming communication in mobile wireless backhaul network

Disclosed are an apparatus and a method for estimating a parameter of a multi path signal. The apparatus for estimating a parameter of a multi path signal includes: a plurality of pre-processing units configured to pre-process respective reception signals received through a plurality of antennas; a plurality of parameter converting units configured to approximate a parameter set of the respective pre-processed reception signals to have a sparse characteristic in a Doppler frequency and angle of arrival domain; and a parameter estimating unit configured to estimate an angle of arrival for a plurality of reception signals in each frequency region of the Doppler frequency and angle of arrival domain.

Apparatus and method for estimating parameter of multi path signal

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 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.

Method for allocating reservation resource for relay in wireless communication system using media access control based on reservation

A method for simultaneously transmitting packets to one or more users in a wireless communication system includes: generating the packets which include length information and are to be transmitted to the one or more users; and simultaneously transmitting the generated packets to the one or more users. The length information includes information representing a unit of the length information and information representing lengths of the packets according to the unit.

Packet transmission/reception method and apparatus in wireless communication system

A method of allocating time for a communication device includes receiving a request for allocation of a second time period related to a second communication link, after allocating a first time period related to a first communication link, and reserving the portion of the second period overlapping the first period, wherein the first link is generated between first and second communication devices, and the second link is generated between third and fourth communication devices. A further aspect of the method includes identifying the first period reserved in advance, and receiving the request for allocating the second period, and allocating the second period to spatially overlap the first time period. A further aspect of the method includes identifying an existing reservation for the first period of the first link, receiving a new reservation for the second period, and allocating the second period to spatially overlap the first period.

The present invention provides a wireless communication method used for transmitting and receiving a relay in a wireless local area network system. The wireless local area network system according to an embodiment of the present invention relates to a wireless communication method of setting a relay link through a relay and setting a transmission time point at which a data frame is transmitted in a source device by recognizing a propagation delay between devices, and the like when an operation mode of the set relay corresponds to a cooperating mode.

Wireless communication method and apparatus for transmitting and receiving frame through relay

A communication method of a source device according to an embodiment includes detecting a status of a first link directly connected from the source device to a destination device or a status of a second link connected from the source device to the destination device via a relay device, selecting any one of the first link and the second link based on a result of the detection, and transmitting data using the selected link.

Communication method for source device, destination device and relay device

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Daejeon, South Korea

Hyun Kyu Chung