Samsung Electronics Co., Ltd.

Korea Advanced Institute of Science and Technology

Kyung-Chun Lee

Joo-Hwan Chun

Jong-Hyeuk Lee

Eung-sun Kim

Ho-Jin Kim

Jae-Hak Chung

Il-Han Kim

Yung-Soo Kim

Young-Ho Jung

Cheol-Woo You

Sung-Oh Kwon

Neung-Hyung Lee

Yu-Seok Kim

Hyun-Jong Yang

Eung-Sun Kim

A method for assigning a single frequency sub-channel to a plurality of MSs (Mobile Stations) in an OFDM (Orthogonal Frequency Division Multiplexing) system utilizing SDM (Spatial Division Multiplexing) with multiple transmit/receive antennas. In the method, a BS (Base Station) can effectively assign a pilot channel to estimate a downlink channel. The BS divides the single frequency sub-channel into a plurality of spatial channels, and sequentially assigns the plurality of spatial channels to the MSs having the maximum communication capacity, thereby transmitting signals of the MSs through the single frequency sub-channel.

Method for assigning channels based on spatial division multiplexing in an orthogonal frequency division multiplexing system with multiple antennas

A method is provided for transmitting inter-cell interference information by a serving Evolved Node B (ENB) in a communication system. The method includes, if a specific resource is allocated to a User Equipment (UE) located in a service region of the serving ENB, checking a location of the UE in the service region; setting a High Interference Sensitivity (HIS) of the UE depending on the result of the checking; determining a location of the UE in an adjacent cell of the service region; setting a High Interference Transmission (HIT) of the UE depending on the determination result; and transmitting a High Interference Indicator (HII) for the specific resource, which includes the HIS and the HIT, to the adjacent cell.

Method and apparatus for transmitting and receiving inter-cell interference information in communication system

A method and apparatus for cooperative relaying based on beamforming in a mobile communication system. In a method of cooperative relaying based on beamforming in a mobile communication system, a signal received from a transmitting terminal is decoded by a relay station to determine whether a decoding error occurs. The relay station then acquires a beamforming weight corresponding to decoding error information, if the decoding error occurs. The relay station then applies the beamforming weight to the signal received from the transmitting terminal, and transmits the signal.

Apparatus and method for cooperative relaying based on beamforming in a mobile communication system

An apparatus and method for supporting relaying in a wireless communication system are provided. The apparatus and method include a transmitting apparatus which acquires channel information between the transmitting apparatus and an RS, pre-encodes a transmission signal to be transmitted to the RS with the channel information, transmits the pre-coded signal to the RS, and acquires, upon receipt of a signal from the RS, a signal transmitted by a receiving apparatus by eliminating the transmission signal transmitted to the RS from the received signal. Accordingly, the apparatus and method improve system capacity gain without adding time resources.

Apparatus and method for relaying in a wireless communication system

Disclosed is a method for transmitting an uplink signal by a mobile station in a mobile communication system using an OFDMA scheme. The method includes estimating a downlink channel status by using a signal received from a base station; determining a precoding matrix by using the estimated downlink channel status; and transmitting a signal obtained by multiplying an uplink signal to be transmitted by the precoding matrix to the base station.

Apparatus and method for transmitting an uplink signal in a mobile communication system using an OFDMA scheme

Disclosed is a method for configuring transmission antenna groups in a mobile communication system with multiple transmission antennas and multiple reception antennas. The method includes the steps of: receiving a first matrix having a size of 'N&#xd7;N', which corresponds to Nnumber of transmission antennas, fedback from the mobile terminal, generating combinations of sub-matrixes of the first matrix corresponding to Nnumber of reception antennas, and calculating sums of maximum eigenvalues; determining combinations of the sub-matrixes having a maximum value from among the calculated sums of eigenvalues to be transmission antenna groups for the Nnumber of transmission antennas; and transmitting different relevant symbols from each other through the transmission antenna groups.

Growing community of inventors

Daejeon, South Korea

Kyung-Chun Lee