Samsung Electronics Co., Ltd.

Seoul National University

Yonsei University

Chungju National University Industry-academic Cooperation Foundation

June Moon

Soon-Young Yoon

Keun-Chul Hwang

In-Seok Hwang

Jae-Hee Cho

Chung-Ryul Chang

Yong-Seok Kim

Sung-woo Park

Ho-Joong Kwon

Ki-Young Han

Eun-Yong Kim

Kwan-Hee Roh

Joseph Jeon

Sung-Soo Hwang

Hee-Kwun Cho

Joo-Hyun Lee

Jang-Hoon Yang

Sung-Ho Lee

Jae-Ho Jeon

Eun-Seok Ko

Sung-Woo Park

Heon-Ki Chae

Seung-won Kang

Yongxing Zhou

Sung-Jin Kim

Yung-Soo Kim

Young-Ky Kim

Young-Hoon Kwon

Byoung-Ha Yi

Nam-Gi Kim

Seungjoo Maeng

Si-Hyun Park

Jae-Woo So

Hojoong Kwon

Jae-Yun Ko

Jee-Woong Kang

In-Taek Lee

Heekwang Lee

Jungah Choi

Chi-Woo Lim

Dae-Gyun Kim

Jong-Hyung Kwun

Beom-Sik Bae

Seung-Hoon Choi

Jung-Won Kim

Ji-Yun Seol

Sang-Woo Lee

Sung-Eun Park

Kyung-Joo Suh

Won-Il Roh

Chang-Yoon Oh

Min-hee Cho

Song-Nam Hong

Yong-Hwan Lee

Hyon-Goo Kang

Cheol Mun

Chung-Yong Lee

Hee-Kwang Lee

Daekyu Shin

Soong-Yoon Choi

Myungkwang Byun

Jaewon Kang

Myoung-Seok Kim

Myonghee Park

Hye-Mi Park

Kiseob Hong

Keon-Wook Lee

Won-Kyun Suk

Chungryul Chang

Seul-Ki Bae

Jing Li

Mi-Sun Yoon

Young-Goo Han

Eunseok Ko

Apparatuses and methods for transmitting and receiving signals in a mobile communication system are provided. A method for transmitting a signal by an evolved Node B (eNB) in a mobile communication system includes transmitting a same control channel signal to each of a plurality of Radio Units (RUs), and transmitting a different data channel signal to each of the plurality of RUs. A data channel signal transmitted to each of the plurality of RUs may be determined taking into account at least one of a location of a User Equipment (UE) that will receive the data channel signal, and load balancing.

Apparatus and method for transmitting and receiving signal in a mobile communication system

The disclosure relates to a 5G or pre-5G communication system for supporting higher data transmission rates than 4G communication systems such as LTE systems. According to the disclosure, a method for performing beamforming by a base station in a wireless communication system comprises obtaining transmission time proportions allocated to a plurality of beam directions and performing beamforming to send control information in the plurality of beam directions based on the obtained transmission time proportions. A base station configured to perform beamforming in a wireless communication system, includes a transceiver configured to perform beamforming communication with a UE, and a processor configured to obtain transmission time proportions allocated to each of a plurality of beam directions, and control beamforming for sending control information based on the obtained transmission time proportions.

Method and device for controlling beamforming transmission

An apparatus and method for reducing the volume of a resource allocation information message in a broadband wireless communication system are provided. The method includes transmitting a message including information indicating a periodicity of an uplink control channel for an initial network entry; and receiving an uplink signal for the initial network entry through the uplink control channel.

Apparatus and method for reducing volume of resource allocation information message in a broadband wireless communication system

An apparatus and method for controlling an inter-cluster interference in a multi cell network are provided. The method includes collecting cluster information in order to cluster base stations into at least one cluster; clustering the base stations into at least one cluster by using at least one of a dynamic clustering method and a hierarchical clustering method, based on the cluster information, determining a cluster boundary base station, which satisfies a predetermined condition, among base stations in a cluster, and controlling the inter-cluster interference.

Apparatus and method for controlling inter-cluster interference in a multi cell network

A transmission method and apparatus are provided for use in a wireless communication system in which a cell includes a plurality of sub-cells. A Transmission Point (TP) in the wireless communication system includes a transmitter configured to transmit a signal to each of the plurality of sub-cells through a plurality of antennas; a receiver configured to receive uplink control information from a User Equipment (UE) located within at least one of the plurality of sub-cells; and a controller configured to determine a virtual matrix for each of the plurality of sub-cells, to select a precoding matrix according to the virtual matrices of the plurality of sub-cells, to determine a cooperative transmission mode or a normal transmission mode, based on the received uplink control information, and to control the transmitter to perform downlink transmission on a sub-cell basis through the virtual matrices of the sub-cells according to the determined transmission mode.

Transmission method and apparatus in a wireless communication system in which a cell includes a plurality of subcells

The present invention relates to a method by which a base station performs multiple input and multiple output (MIMO) transmission using antennas of a plurality of cells in a multi-cell wireless communication system, the method comprising the steps of: selecting a rank value and cells for downlink MIMO transmission of a terminal on the basis of measurement information of the base station and the terminal, and determining a precoding matrix according to the rank value; and generating data which is to be transmitted to the terminal as data streams corresponding to the selected rank value, and mapping the data streams to antennas of the selected cells through a precoder so as to transmit the data streams to the terminal.

MIMO transmission method and MIMO transmission device using plurality of cells in multi-cell wireless communication system

An apparatus and method for transmitting and receiving data in a communication system are provided. In the method, a BS selects a repeater group from among a plurality of repeater groups, for use in transmitting first data to an MS and transmits the first data to the MS according to the number of repeaters of the selected repeater group. The first data is different from data transmitted by the repeaters of the selected repeater group.

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

Performing scheduling operations by a centralized scheduler in a wireless communication system. Receiving Channel State Information (CSI) about a channel between each of a plurality of Transmission Points (TPs) and each of a plurality of User Equipments (UEs) performing communication with each of the plurality of TPs from each of the plurality of TPs, performing a first scheduling operation for allocating wireless resources to each of the plurality of TPs based on the CSI received from each of the plurality of TPs, and transmitting first scheduling information representing a result of the first scheduling operation to each of the plurality of TPs. The first scheduling information contains transmission power information representing transmission power for each of the wireless resources allocated to each of the plurality of TPs, and is used to perform a second scheduling operation to select a UE to communicate with each of the plurality of TPs.

Method and apparatus for performing scheduling in wireless communication system

A centralized scheduling method and apparatus is provided for minimizing inter-cell interference in the wireless communication system adopting femto-eNB-based service coverage expansion (range expansion). The method includes establishing, by a server, a connection with at least one base station, collecting channel information between the at least one base station connected to the server and terminals, determining interfering base stations causing interference to each terminal based on the channel information, and selecting the terminals to be scheduled in consideration of the interfering base stations.

Centralized-scheduling method and apparatus for inter-cell interference coordination in heterogeneous network

A method of supporting fast sub-cell switching by a sub-cell included in a macro coverage in a wireless communication system is provided. The method includes receiving multiple pieces of feedback information on multiple sub-cells from a User Equipment (UE), extracting channel quality indicators from the multiple pieces of received feedback information, respectively, comparing values of the extracted channel quality indicators, and determining, based on a result of the comparison of the values of the extracted channel quality indicators, whether to perform fast sub-cell switching of the UE.

Method and apparatus for one cell operation with fast small cell switching in wireless communication system

The present invention relates to a method and apparatus for transmitting data in a wireless communication system for supporting multi-cells formed of a plurality of sub-cells. The method includes the steps of: connecting at least one virtual transmission port to each of the plurality of sub-cells; determining the transmission mode for a terminal on the basis of channel states between at least two of the plurality of sub-cells and the terminal; and transmitting data for each sub-cell to the terminal through at least one virtual transmission port connected to a corresponding sub-cell on the basis of the determined transmission mode.

Method and apparatus for transmitting data in wireless communication system

A method and apparatus are provided for determining channel quality in a wireless communication system. The method includes receiving Channel Quality Information (CQI) from a receiver; generating a channel quality reference value by correcting the received CQI using first resource use/nonuse information received from a scheduler that indicates whether an adjacent cell used resources at a previous time, and received signal power information measured in the adjacent cell; and determining a channel quality value at a current time using the generated channel quality reference value and second resource use/nonuse information received from the scheduler that indicates whether an adjacent cell uses resources at the current time.

Method and apparatus for determining channel quality in a wireless communication system

Growing community of inventors

Seoul, South Korea

June Moon