Samsung Electronics Co., Ltd.

Chung Ang University Industry Academic Cooperation

Hyun-Il Yoo

Jee-Hwan Noh

Tae-young Kim

Su-Ryong Jeong

Keon-Kook Lee

Ji-Yun Seol

Young-Han Nam

Jong-Ho Lee

Yung-Soo Kim

Tae-Young Kim

Sang-Boh Yun

Joo-Hyun Lee

Yong-Soo Cho

Jin-Ghoo Choi

Jae-Kwon Kim

Yeong-Jun Kim

Kyung-Soo Woo

The present disclosure relates 5G or pre-5G communication systems for supporting higher data transmission rate than those by LTE or other post-4G communication systems. According to the present disclosure, a method for operating a beamformed reference signal by a base station and terminal in a communication system, and the terminal, are provided. The method includes transmitting, to a terminal, control information indicating whether a first codebook is used for generating feedback information on a downlink reference signal. The first codebook is used if generating feedback information on the beamformed reference signal and is generated based on a number of antenna ports and a number of ranks.

Method and apparatus for operating beamformed reference signal in communication system

Disclosed is a 5G or pre-5G communication system for supporting a data transmission rate higher than that of a 4G communication system such as LTE. A method for receiving a reference signal, according to the present disclosure, comprises the steps of: receiving configuration information on a reference signal; determining whether the aperiodic transmission of the reference signal is instructed on the basis of the configuration information; receiving a signal for requesting a measurement of the reference signal; measuring the reference signal on the basis of the configuration information when the received reference signal measurement request is aperiodic; generating channel state information on the basis of the measured result of the reference signal; and transmitting the channel state information.

Method and apparatus for transmitting and receiving reference signal in communication system

The present disclosure relates to a 5G or pre-5G communication system for supporting a higher data transmission rate than a 4G communication system such as LTE. The present disclosure relates to a method for a transmission end to estimate a channel in a communication system supporting multiple input multiple output (MIMO)-based beamforming, the method comprising: a step of obtaining a candidate channel estimate of each of a plurality of candidate beam combinations by means of a channel estimation section corresponding to each of the plurality of candidate beam combinations, the combinations consisting of at least one transmission beam and at least one reception beam from among transmission beams of the transmission end and reception beams of a reception end, wherein the channel estimation section corresponding to each of the plurality of candidate beam combinations comprises a serving channel estimation section corresponding to a serving beam combination of the transmission end and the reception end, a channel gain estimation section of one candidate beam combination of the plurality of candidate beam combinations, and a channel estimation section of the candidate beam combination; and a step of obtaining an optimal channel estimation value of the transmission end and the reception end on the basis of the obtained candidate channel estimates.

Method and apparatus for estimating channel in communication system supporting MIMO-based beamforming

Disclosed is a 5G or pre-5G communication system to be provided so as to support a data transmission rate higher than that of a 4G communication system, such as LTE. Disclosed is a communication method of a base station using a channel state information reference signal (CSI-RS) in a mobile communication system, the method comprising the steps of: receiving a sounding reference signal (SRS) from a terminal; selecting a precoding matrix by using the received SRS; transmitting a CSI-RS by using the selected precoding matrix; receiving a CSI report from the terminal, and determining a transmission parameter on the basis of the CSI report; and transmitting data to the terminal by applying the determined transmission parameter thereto, wherein the CSI-RS is aperiodically transmitted.

Communication technique using CSI-RS in mobile communication system

Disclosed are: a communication technique for fusing, with IoT technology, a 5G communication system for supporting a data transmission rate higher than that of a 4G communication system; and a system therefor. The communication technique can be applied, on the basis of 5G communication technology and IoT-related technology, to intelligent services (for example, smart home, smart building, smart city, smart car or connected car, health care, digital education, retail, security and safety-related services, and the like). A method for estimating a channel in a communication system, according to one embodiment of the present invention, comprises the steps of: confirming a code and antenna distinguishing scheme used in channel estimation; generating a channel estimation code on the basis of the confirmed code and antenna distinguishing scheme; and transmitting the generated channel estimation code through a plurality of transmission antennas.

Device and method for estimating channel in communication system

The present disclosure relates to a 5G or pre-5G communication system for supporting a higher data transfer rate beyond a 4G communication system such as LTE. A method and an apparatus for transmitting and receiving channel state information are disclosed. The method comprises: a step of transmitting, to a terminal, a signaling message including first information indicating at least one precoding matrix which is applicable to a symbol vector to be transmitted; a step of transmitting, to the terminal, a channel status information-reference signal (CSI-RS) for the terminal; and a step of receiving channel state information including a channel quality indicator (CQI) which is calculated using the selected precoding matrix on the basis of second information from the terminal.

Channel state information feedback method and apparatus

A method and apparatus for transmitting and receiving a signal of Random Access Channel (RACH) in a wireless communication system using beamforming are provided. The reception method includes receiving the signal through each transmission beam of a transmitter from a transmitter, transmitted in each transmission beam by the transmitter, the signal including as many repeated symbols as a total number of reception beams of a receiver, and detecting symbols by switching to reception beams corresponding to the symbols included in the signal during reception of the signal.

Method and apparatus for transmitting and receiving uplink random access channel slot in a wireless communication system using beamforming

Provided is a handover method of a wireless communication system using a hierarchical cellular scheme. In the method, signal quality of a serving node is measured, so that whether to start scanning for a handover is determined. When the scanning for the handover starts, signal qualities of a serving cell including the serving node and one or more neighbor cells are measured through a first preamble including a first identifier for distinguishing a cell. An intra-cell handover or an inter-cell handover is selected using the signal qualities of the serving cell and the neighbor cells. Therefore, a terminal can easily distinguish between the inter-cell handover and the intra-cell handover, and an overhead during a handover can be reduced because an intra-cell handover procedure is simplified.

Growing community of inventors

Suwon-si, South Korea

Hyun-Il Yoo