Samsung Electronics Co., Ltd.

Korea Advanced Institute of Science and Technology

Seoul National University

Eun-Yong Kim

Eun-Seok Ko

June Moon

Yung-Soo Kim

Sang-min Lee

Myeon-Kyun Cho

Ho-Joong Kwon

Joseph Jeon

Tak-Ki Yu

Joo-Hwan Chun

Joon-Young Cho

Ju-Ho Lee

Jong-Hyung Kwun

Sung-soo Kim

Young-Ky Kim

Sung-Woo Park

Chung-Ryul Chang

Yu-Seok Kim

Ju-Mi Lee

Jee-Woong Kang

Soo-Min Ko

Ho-Kyu Choi

Seung-Joo Maeng

Bruno Clerckx

Hyeon-Woo Lee

Keun-Chul Hwang

Sang-Min Lee

Seung-Hoon Nam

Jong-Hyeuk Lee

Song-Nam Hong

Joon-Ho Park

David Mazzarese

Chan-Soo Hwang

Shuangfeng Han

Sae-Young Chung

Seung-Hee Han

Sang Won Choi

Hye-Mi Park

Keon-Wook Lee

Han-Byul Seo

Byeong-Gi Lee

Jo-Seph Jeon

Young-Goo Han

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

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

A method of determining a serving sub-cell of a terminal among a plurality of sub-cells by a base station in a wireless communication system is provided. The method includes generating reference signal transmission interval information for each of the sub-cells by configuring a reference signal transmission interval for each of the plurality of sub-cells, and transmitting the reference signal transmission interval information for each of the sub-cells to the corresponding sub-cell, receiving channel status information for at least one sub-cell among the plurality of sub-cells from the terminal, and determining a serving sub-cell of the terminal by using at least one of the reference signal transmission interval information, the channel status information, a reception time of the channel status information, of each of the sub-cells.

Method and apparatus for determining serving sub-cell in wireless communication system including multiple sub-cell

A method for transmitting data by a base station in a wireless communication system is provided. The method includes transmitting a response signal for downlink data received from a user equipment and channel state information to a central coordinator, receiving scheduling information from the central coordinator and determining an interference control mode determined according to whether interference of adjacent base stations is controlled, based on the scheduling information, and transmitting data to the user equipment by using a Modulation and Coding Scheme (MCS) level according to the determined interference control mode.

Method and apparatus for transmitting data in wireless communication system

An apparatus and method for operating a Codebook Subset Pattern (CSP) of a Base Station (BS) in a Multiple Input Multiple Output (MIMO) system are provided. The method includes determining whether there is a CSP-updated BS among the BS and adjacent BSs, exchanging the updated CSP between cells if it is determined that there is a CSP-updated BS, and broadcasting the CSP of each cell acquired through the exchange thereby reducing an inter-cell interference in the MIMO system.

Apparatus and method for reducing inter-cell interference in multiple input multiple output 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.

An apparatus and method for resource allocation information transmission is provided. The method includes determining a search space for use in a second frequency band using resource allocation information of a first process detected in a first frequency band, detecting resource allocation information using the search space in the second frequency band, and when failing to decode received data according to the resource allocation information detected in the second frequency band, re-detecting resource allocation information of the first process in the second frequency band in a first time interval using the search space without detecting the resource allocation information of the first process in the first frequency band.

Apparatus and method for resource allocation information transmission in mobile communication system

Methods and apparatus are provided for controlling interference by a TP in a wireless communication system. A first message, which includes channel quality information for the TP, is received from a terminal to which the TP provides a communication service. A second message, which includes received power information for a reference signal received from the terminal, is received from at least one neighbor TP. A data transmission rate is determined for the terminal based on the channel quality information and the received power information.

Apparatus and method for controlling interference in a 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

In a Multiple-Input Multiple-Output (MIMO) communication system, a serving evolved Node B (eNB) receives a channel covariance matrix of the serving eNB and a channel covariance matrix for a first neighbor eNB with the highest interference among neighbor eNBs, from a User Equipment (UE). Received signal power information is generated for each subband-beam pair. Interference signal power information is generated for each subband-beam pair for the first neighbor eNB. The generated interference signal power information is exchanged with the first neighbor eNB for each subband-beam pair. Beam coordination information indicating a use status of each beam in each subband is generated for the UE, using the interference signal power information of the first neighbor eNB. The generated beam coordination information is exchanged with the neighbor eNB. Scheduling is performed on the UE using the generated beam coordination information and the beam coordination information of the first neighbor eNB.

Method and apparatus for scheduling in multiple-input multiple-output communication system

A Mobile Station (MS) is operable to select a precoding matrix in a multi-antenna wireless communication system. The method includes receiving, from a serving Base Station (BS), information on a precoding matrix of which use is prohibited and a precoding matrix to be used by a neighbor BS, estimating an interference signal for the precoding matrix to be used by the neighbor BS, and selecting a precoding matrix to be used by the serving BS by considering the estimated interference signal from the remaining precoding matrixes except for the precoding matrix of which use is prohibited among precoding matrixes used by the serving BS.

Apparatus and method for selecting precoding matrix in multiple antenna wireless communication system

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Hwaseong-si, South Korea

Eun-Yong Kim