Electronics and Telecommunications Research Institute

Samsung Electronics Co., Ltd.

Kt Corporation

Catholic University Industry Academic Cooperation Foundation

Seung Chan Bang

Il Gyu Kim

Young Jo Ko

Young Hoon Kim

Hyeong Geun Park

Hyo Seok Yi

Kap Seok Chang

Jae Seung Lee

Jae Woo Park

Yu Ro Lee

Jee Yon Choi

Tae Joong Kim

Chan Bok Jeong

Moon Sik Lee

Jung Im Kim

Ki Chul Han

Jae Heung Kim

Kyoung Seok Lee

Kapseok Chang

Young-Hoon Kim

Soo Jung Jung

Byung Han Ryu

Jun Hwan Lee

Jae Ryong Shim

Soo Chang Kim

Seung Eun Hong

Byung-Han Ryu

Jung-Im Kim

Young Seog Song

Moon-Sik Lee

Pyeong Jung Song

Seon-Ae Kim

Byung-Jae Kwak

Keun Young Kim

Eun Young Choi

Byung Jae Kwak

Seok Ho Won

Kyoung Joon Lee

Suchang Chae

Seyoung Cho

Sok Kyu Lee

Sung Cheol Chang

Min Ho Cheong

Tae-Joong Kim

Young-Jo Ko

Hyun Kyu Chung

Ji Hyung Kim

Jin Kyeong Kim

Eun-Young Choi

Hee Jung Yu

Hee Sang Chung

Hyun Seo Park

Sung Geun Jin

Junhyeong Kim

Sang-Goog Lee

Hyeong Jun Park

Ok-Sun Park

Juho Park

Don Sung Oh

Ki-Chul Han

Hye Kyung Jwa

Ii Gyu Kim

Hee-Jae Lee

The present application relates to a method of generating a downlink frame. The method of generating the downlink frame includes: generating a first short sequence and a second short sequence indicating cell group information; generating a first scrambling sequence and a second scrambling sequence determined by the primary synchronization signal; generating a third scrambling sequence determined by the first short sequence and a fourth scrambling sequence determined by the second short sequence; scrambling the short sequences with the respective scrambling sequences; and mapping the secondary synchronization signal that includes the first short sequence scrambled with the first scrambling sequence, the second short sequence scrambled with the second scrambling sequence and the third scrambling sequence, the second short sequence scrambled with the first scrambling sequence and the first short sequence scrambled by the second scrambling sequence and the fourth scrambling sequence to a frequency domain.

Generating downlink frame and searching for cell

A method of searching a cell in a mobile station of a communication system in which a plurality of cells are grouped into a plurality of cell groups, each cell group including at least two cells, includes: detecting a primary synchronization signal and a secondary synchronization signal from a received signal; and identifying a cell based on a combination of the primary synchronization signal and the secondary synchronization signal. The secondary synchronization signal is related to the cell group to which the mobile station belongs and the primary synchronization signal is related to the cell to which the mobile station belongs within the cell group.

Cell search method, forward link frame transmission method, apparatus using the same and forward link frame structure

A beam fingerprint-based positioning method, performed by a communication node located in a target space, may include: performing measurements on positioning signals transmitted from at least one reference node through a plurality of directional beams in a beam sweeping scheme; transmitting a result of the measurements to a central node; and receiving information on a position of the communication node from the central node.

Method and apparatus of positioning for accommodating wireless-environment change

A wireless communication method and apparatus in a wireless local area network (WLAN) system are disclosed. A wireless communication method according to one embodiment may include generating a high-efficiency Wi-Fi (HEW) frame including at least one of an HEW-SIG-A field and an HEW-SIG-B field which include channel information for communications according to an Orthogonal Frequency-Division Multiple Access (OFDMA) mode, and transmitting the generated HEW frame to a reception apparatus.

Wireless communication method and apparatus for wireless local area network system

A positioning method using images and radio waves may include: estimating a distance and an angle from the positioning reference node to a positioning target terminal; identifying an obstacle or reflective object in a vicinity of the positioning target terminal or on a path between the positioning target terminal and the positioning reference node by using image information on the positioning target terminal at a position estimated by the distance and the angle; estimating an incident angle or a reflection angle of a radio wave signal reflected by the reflective object identified based on the image information; and estimating a position of the positioning target terminal based on the reflection angle and the distance.

Method and apparatus for positioning using image and radio signals

Disclosed are a frame transmission method using a selective beamforming and a communication apparatus to perform the frame transmission method. The communication apparatus may determine a beamforming matrix based on classification information in which a plurality of subcarriers used for communication is classified into a plurality of frequency units, may map a long training field (LTF) sequence to the beamforming matrix, and transmit a beamforming training (BF-T) frame including the mapped LTF sequence to a plurality of stations, may receive, from the plurality of stations having receiving the BF-T frame, feedback information generated based on a reception strength of the BF-T frame, and may allocate frequency units to data frames to be transmitted to the plurality of stations based on the feedback information, and transmit the data frames using the allocated frequency units. The reception strength of the BF-T frame may be determined at each station for each frequency unit.

Method for transmitting frame using selective beamforming and apparatus for performing the method

The present invention relates to a method for generating a downlink frame including generating a first short sequence and a second short sequence indicating cell group information, generating a first scrambling sequence determined by the first synchronization signal, generating a second scrambling sequence determined by the first short sequence, scrambling the first short sequence with the first scrambling sequence, scrambling the second short sequence with at least the second scrambling sequence, and mapping a second synchronization signal including the scrambled first short sequence and the scrambled second short sequence in the frequency domain.

Provided is a method for transmitting paging information in a cellular system. An object of the method is transmitting paging information which can improve applicability of a limited radio resource by variably and flexibly setting up and mapping a transport channel and a physical channel in order to transmit information notifying start of downlink information from a base station to a terminal in a cellular system for packet transmission. The method includes the steps of: forming a paging channel (PCH) in a transport channel corresponding to generation of paging information; setting a paging indication channel (PICH) based on the paging information and forming the paging indication channel in a radio resource of a physical layer; and allocating the paging channel to the radio resource of the physical layer.

Method for paging information in cellular system

Disclosed are a frame transmission method and a communication device performing the same. The communication device transmits a null data packet (NDP)-announcement (NDP-A) including information on a plurality of communication devices participating in interference alignment and transmits an NDP including a common signal field and a common training field commonly applied to the plurality of communication devices.

Method for transmitting frame and communication device for performing the same

Growing community of inventors

Daejeon, South Korea

Seung Chan Bang