Intellectual Discovery Co., Ltd.

Electronics and Telecommunications Research Institute

Korea Houghton Corporation

Samsung Electronics Co., Ltd.

Yonsei University

Lg Electronics Inc.

Hyundai Motor Company

Kia Motors Corporation

Hanval Inc.

Industry—academic Cooperation Foundation, Yonsie University

Kwang Soon Kim

Hyung Lee

Young Jin Sang

Jiwon Kang

Suck Chel Yang

Heejin Kim

Byoung Hoon Kim

Kyungjun Choi

Sung Cheol Chang

Chul Sik Yoon

Song Yean Cho

Sang Soo Jeong

Kyoung Seok Lee

Beom Sik Bae

Chae Gwon Lim

Il-Soon Jang

Jee Hwan Ahn

Ji Yong Lee

Ki-Jun Kim

Jin Hee Han

Dong Ho Kwak

Deuk Su Lyu

Sun Sim Chun

Il Soon Jang

Ho Il Kim

Chul Hee Hong

Dong Choon Lee

Moon Sik Lee

Byung Jun Jung

Sung Hyun Park

Byung Yang Ahn

Jae Wook Chung

Min Gyu Kang

Young Uk Kwon

Jung Hyoung Kwon

Jin Bae Park

Suck-Chel Yang

Sik Lee Moon

Jae Min Cha

The present disclosure relates to a synthetic vegetable oil and an environmental-friendly flame-retardant hydraulic oil composition including the same, and a preparation method thereof, and provides a method of preparing a glycerin-ester-based lubricating base oil through a catalyst-free and rinsing-free process, a glycerin-ester-based lubricating base oil that is a synthetic vegetable oil obtained by the method, and an environmental-friendly flame-retardant hydraulic oil composition that contains the glycerin-ester-based lubricating base oil and that is capable of reducing electricity consumption by 7 to 8% compared to mineral oil-based lubricating oils due to excellent flame retardancy (with self-extinguishing function) and lubricity.

Synthetic vegetable oil and environmental-friendly flame-retardant hydraulic oil composition including the same, and preparation method thereof

A communications device and a data receiving method thereof are provided. The communications device includes: a receiver antenna receiving data; a receiver phase shifter forming a first sum beam and a first difference beam based on a first estimated direction-of-arrival (DOA); a receiver radio frequency (RF) chain generating first difference beam output using the first difference beam formed during a first data period of the received data and generating first sum beam output using the first sum beam formed in a second data period of the received data, which is different from the first data period; and a receiver controller calculating an offset vector between an actual DOA and the first estimated DOA based on the first difference beam output and the first sum beam output.

Communications device and data receiving method thereof

The present application provides a method for a multi-user multi-stream supporting base station transmitting a signal to a terminal. The method comprising: estimating channel information of a first terminal by receiving a reference signal from the first terminal; and by using the estimated channel information, transmitting a plurality of beams to the first terminal based on a non-orthogonal multiple access scheme. When transmitting the plurality of beams to the first terminal based on the non-orthogonal multiple access scheme, a plurality of virtual terminals of the first terminal are generated, and a signal for a first virtual terminal among the plurality of virtual terminals are allocated to a first beam and transmitted, and a signal for a second virtual terminal among the plurality of virtual terminals are allocated to a second beam and transmitted.

Method and device for supporting multi-user multi-stream in wireless communication system

Provided is a method and an apparatus for uplink and downlink separated connections, wherein a terminal may establish a downlink cell association with a downlink base station, receive an identifier of an uplink base station providing an uplink from the downlink base station to the terminal through an established downlink, and establish an uplink cell association with the uplink base station using the identifier of the uplink base station, and the downlink base station may select the uplink base station from among base stations in a network based on an uplink reference signal and a bias factor.

Method and apparatus for separated connections of uplink and downlink

The exemplary embodiment of the present invention provides a method of synchronizing a femtocell base station securing time synchronization of a femtocell base station by allowing the femtocell base station to transmit a symbol to a terminal belonging to the femtocell by performing the time synchronization with a preamble signal when the femtocell base station receives the preamble signal from the macrocell base station in an orthogonal frequency division multiple access (OFDMA) communication system in which a femtocell is present in a macrocell.

Synchronization method of femtocell base station and femtocell base station using the same

Provided are a method and a device for avoiding interference of an uplink in a macro cell within a heterogeneous cellular network system. A femtocell base station calculates a degree of the interference of the uplink in the macro cell, and determines whether the interference is strong. If the interference of the uplink in the macro cell is strong, the femtocell base station changes the order of a femtocell uplink frame and a femtocell downlink frame.

Method and device for avoiding macro interference

The present invention relates to a mobile communication system, and to a method for managing terminal paging in the system. According to the present invention, local IDs are each allocated to the respective multiple MTC terminals, and therefore trigger periods can be efficiently managed in a network. Further, the multiple MTC terminals can be grouped using the allocated local IDs, thus achieving advantages of an increased number of MTC terminals which can be managed in the network.

Mobile communication system and method for managing terminal paging in the system

A method for cooperative control of power among base stations and a base station device which performs the same are discussed. A first receiving unit is configured such that a specific base station in a cooperative unit receives, from a specific terminal located on a cell edge of the specific base station, token value information which indicates an average transmission rate of the specific terminal and the up-to-date level of satisfaction of the minimum average transmission rate of the specific terminal. A second receiving unit receives, from one or more other base stations in the cooperative unit, information containing an average transmission rate of terminals located on edges of each of the base stations, token values of terminals located on cell edges of each of the base stations, and the current power levels of each of one or more base stations.

Method for cooperative control of power among base stations and base station device using same

A grease composition using lubricating base oil that is biodegradable by microorganisms in nature and has an affinity to the human body is provided. More particularly, a distillation residue secondarily generated in production of biodiesel from vegetable oil (soybean oil and canola oil) is used as the lubricating base oil. The grease composition is produced by adding 1 to 20 wt % of additives to 100 to 95 wt % of distillation residues, which is generated in production of biodiesel, and 1 to 30 wt % of thickeners.

Biodegradable grease composition using distillation residue generated in production of biodiesel

A self-configuring method of a femtocell base station extracts preambles from signals received from adjacent macrocells and femtocells. Transmission power of the femtocell base station is set using the extracted macrocell preambles. In addition, the preambles of the femtocell base station are selected using the correlation values between the macrocell preambles and the pre-stored femtocell preambles. Moreover, the resources for data transmission of the femtocell base station are allocated considering the adjacent macrocells and the femtocells.

Femtocell base station apparatus and self-configuring method thereof

The present invention provides an aluminum white rust inhibiting composition containing alkali metal metasilicate and alkali metal hydroxide as essential components. The composition described by the present invention can provide an anti-corrosion function to vehicle aluminum parts without a separate surface process, thus reducing the manufacturing cost by reducing the number of processes and improving the durability of the vehicle aluminum parts.

White rust inhibiting composition for aluminum parts

A demodulator of a W-CDMA base station comprises: a chip calculator for de-spreading signals received through sectors including antennas; a symbol calculator for using symbols of a control channel and a data channel from the de-spread signals, estimating a channel, and combining signals input through a multi-path; a frame calculator for combining the combined signals to perform transport format combination indicator decoding, feedback information decoding, frame sync estimation, SNR estimation, post-combining, and second de-interleaving; a storage unit for storing outputs of the chip calculator, symbol calculator, and frame calculator; a storage unit controller for controlling inputs/outputs between the chip calculator, symbol calculator, frame calculator, and storage unit; and a host interface for controlling inputs/outputs between the chip calculator, symbol calculator, frame calculator, and host.

Demodulating device and method for W-CDMA base station

Growing community of inventors

Seoul, South Korea

Kwang Soon Kim