Samsung Electronics Co., Ltd.

Korea Advanced Institute of Science and Technology

Yonsei University

Sang-Wook Suh

Wan Gyun Choi

Daesik Hong

Myung-Gil Kang

Dae-Kyu Shin

Beomju Kim

Sung-Mook Lim

Wonsuk Chung

Chan-Hong Kim

Jae-young Jang

Seung-Chan Lim

Hyung-Jong Kim

Hyeon-Cheol Park

Woo-Wan Wang

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 long term evolution (LTE). According to the present disclosure, a method for transmitting a signal in a communication system supporting multi-user access comprises the steps of: transmitting, to a receiving device, information indicating a codebook formed on the basis of at least two signal constellations for sparse code multiple access (SCMA) transmissions; and transmitting signals on the basis of the codebook, wherein the at least two signal constellations are generated on the basis of energy values of symbols of a pre-given mother signal constellation and sizes of the symbols of the mother signal constellation.

Method and device for transmitting signal in communication system supporting multi-user access

The present disclosure relates to a pre-5th-generation (5G) or 5G communication system to be provided for supporting higher data rates beyond 4th-generation (4G) communication system such as a long term evolution (LTE). A method for receiving transmission beam (Tx beam) information by a user equipment (UE) in a communication system supporting a multi-user multi-input multi-output (MU-MIMO) scheme is provided. The method includes transmitting information on a selected Tx beam to a base station (BS), and receiving Tx beam information including information for a Tx beam selected by at least one UE other than the UE from the BS.

Apparatus and method for transmitting and receiving transmission beam information and channel quality information in communication system supporting multi-user multi-input multi-output scheme

The present disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT). The present disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. Disclosed are a method and an apparatus for performing adaptive beam hopping in a multi-cell multi-user communication system. The method includes: making a request for allowing multiple accesses for beam hopping for a predetermined operation time to a plurality of accessible base stations (BSs); receiving a response to the request from two or more BSs among the plurality of BSs and determining, according to a predetermined reference, beams above the reference among transmission beams of the two or more BSs as available beams; determining a beam hopping pattern based on the determined available beams and transmitting the determined hopping pattern to the two or more BSs; and forming reception beams based on the determined beam hopping pattern to receive signals.

Method and apparatus for adaptive beam hopping in multi cell multi user communication system

The present disclosure relates to a pre-5-Generation (5G) or 5G communication system to be provided for supporting higher data rates beyond 4-Generation (4G) communication system such as a Long Term Evolution (LTE). A method for controlling interference in a signal transmitting apparatus in a mobile communication system is provided. The method includes transmitting data to a first signal receiving apparatus using a plurality of channels; receiving information indicating whether at least one of the plurality of channels exists as an interference channel in a second signal receiving apparatus from the second signal receiving apparatus; receiving interference control information for controlling interference for the second signal receiving apparatus from the second signal receiving apparatus based on the received information, and generating interference control data based on the interference control information; and transmitting the interference control data to the first signal receiving apparatus.

Method and apparatus for controlling interference in mobile communication system

An apparatus and method for performing uplink scheduling in a Multiple-Input Multiple-Output (MIMO) system are provided. The method includes selecting User Equipments (UEs) as members of at least one user set for simultaneous transmission from among UEs from which channel information is received, using the channel information, and generating a power control value for each of the at least one user set and transmitting the power control value to UEs of the user set. The at least one user set includes a second user set including UEs selected according to interference that the UEs cause to a first user set from among remaining UEs unselected for the first user set, the first user set including UEs selected in a descending order of reception power from among the UEs from which the channel information is received.

Method and apparatus for performing uplink scheduling in a multiple-input multiple-output system

A frequency-efficient antenna operation method is provided in a multiuser beamforming system. The method includes determining channel correlations and channel gain differences between channels using channel information received from multiple terminals, classifying the multiple terminals into at least one or more clusters using the channel correlations and channel gain differences, selecting a beamforming vector for each of the one or more clusters using the channel information of at least one or more terminals in the one or more clusters, allocating power to the terminals in each of the one or more clusters, and forming a beam based on the allocated power and the selected beamforming vector. According to the method, interference due to sharing space resources may be reduced and more efficient data communication may be achieved.

Method and apparatus for operating a non-orthogonal multiple access scheme in multiuser beamforming system

A method for supporting Interference Alignment (IA) in a wireless communication system includes multiplying a plurality of input symbols by precoding vectors for Interference Alignment (IA) to generate a plurality of signal vectors, mapping the signal vectors to subcarriers having unequal spacings to perform Inverse Fast Fourier Transform (IFFT), in which each signal element of the signal vector is mapped to two subcarriers among the subcarriers, converting the IFFT-transformed signal into a wireless signal and transmitting the wireless signal from a first transmitter to a receiver, and transmitting, to the receiver, information regarding precoding vectors used in the first transmitter and in second and third transmitters that communicate using the same frequency resource as the first transmitter for the IA.

Interference alignment method and apparatus in wireless communication system

A water purifier includes a water storage tank and a plurality of filters which purify water delivered to the storage tank. A water sterilizer is provided for inhibiting the growth of bacteria in the purified water. The sterilizer comprises a cartridge in which an antibiotic substance, such as an iodine resin, is disposed. The sterilizer can be disposed within a filter, such as a final one of the filters, or it can be disposed in a water conduit of the filtering system.

Water purifier with sterilizing device

A water purifier includes a support body having a wide bottom portion for supporting the purifier, and a vertical wall panel having front and rear sides. Filter members for purifying water are mounted on the body at the front side thereof, and a pump, circuit board, electric transformer, and fluid control valves are mounted on the body at the rear side thereof to balance the weight of the purifier.

Water purifier

A water purifier includes a plurality of filter members for purifying fresh water. A first connecting hose supplies fresh water to one of the filter members, and additional connecting hoses conduct fresh water sequentially to the other filter members. Thermal insulators surround at least the first connecting hose and at least one of the filter members to prevent the formation of dew thereon.

Dew forming prevention apparatus

A water purifier includes a filter for purifying water, and a tank for storing purified water. The tank includes a discharge hole for discharging excess water disposed above a certain level in the tank. A conduit structure communicates with the discharge hole for conducting the discharged excess water. The conduit structure includes vertical interruptions for preventing a backflowing of the discharged water back into the tank.

Water purifier having a storage tank and an excess water discharge

A water purifier includes a body forming a horizontal support surface and a wall projecting upwardly from the support surface. A plurality of filtering members for purifying water are connected to the wall. A water storage tank for storing purified water is seated on the support surface and bears against the wall. A supporting structure supports the filters from beneath to reduce the load applied to the wall. A reinforcing member is connected to the wall for reinforcing the wall against deformation.

Growing community of inventors

Yongin-si, South Korea

Sang-Wook Suh