University-industry Cooperation Group of Kyung Hee University

Electronics and Telecommunications Research Institute

Sk Bioscience Co., Ltd.

Yun Hee Kim

Sung-Hyun Hwang

Jin Soo Wang

Hun Rae Kim

Hyun Kyu Chung

Myung Sun Song

Jung Sun Um

Heesoo Lee

Sung Hyun Hwang

Bangwon Seo

Gwangzeen Ko

Jae Cheol Park

Chang Joo Kim

Dong Soo Ham

Yong Wook Park

Jae Chul Park

Sung Kyo Kang

Hwan Ui Jung

The present invention relates to a method of preparing an influenza working virus seed stock, a method of increasing infectivity of an influenza working virus seed stock, a method of preparing an influenza vaccine using the seed stock, an influenza vaccine prepared by the method, and an influenza working virus seed stock having increased infectivity.

Method for preparing influenza working virus seed stock, method for preparing influenza vaccine using same seed stock, and virus seed stock prepared by same method

In the hybrid automatic repeat request (H-ARQ) supporting method for cooperative transmission, a receiver selects one H-ARQ repeat method from among the chase combining method and the incremental redundancy method according to the SNR when the data packet cooperatively transmitted by transmitters generates an error. Also, the method for the receiver to select a repeat transmitter includes a method for selecting a repeat transmitter in advance, a method for removing a transmitting node from a repeat transmitter group when the SNR of the transmitting node is low, and a method for estimating the SNR of each transmitter for each predetermined time frame and selecting the transmitter having the greatest SNR as the repeat transmitter.

Cooperative H-ARQ supporting method

Provided is a transmitter for transmitting an orthogonal frequency division multiplexing (OFDM) signal using multiple antennas, including: a subgroup generator to divide data symbols of a frequency domain into a plurality of subgroups; an inverse fast Fourier transform (IFFT) unit to perform an IFFT with respect to each of the subgroups so as to generate partial signals of a time domain corresponding to the plurality of subgroups, respectively; a candidate OFDM signal generator to generate at least two candidate OFDM signals using a combination of the partial signals so that each of the partial signals is transmitted to one of transmit antennas; and a selector to select one of the at least two candidate OFDM signals.

Method of transmitting and receiving orthogonal frequency division multiplexing (OFDM) signal using multiple antennas, and transmitter and receiver thereof

A method and apparatus for adaptively transmitting the same data, i.e., multicast/broadcast data, according to channel quality to a receiving group including one or more terminals that request the same service in a wireless network. A base station obtains feedback on channel quality indications (CQIs) from a plurality of terminals, selects a transmission technique that satisfies desired service quality based on the CQIs, and transmits data to the terminals included in a receiving group by using the selected transmission technique. The CQIs to be transmitted from the terminals in the receiving group to the base station are transmitted through a previously allocated common CQI feedback channel. In the present invention, in order to reduce a CQI feedback channel capacity, the base station does not allocate a common CQI feedback channel with respect to each reception terminal and allocates radio resources according to CQI levels. As radio resources are allocated according to CQI levels, a CQI feedback channel capacity may not be increased even when the number of terminals in the receiving group is increased and adaptive transmission may be efficiently performed.

Method and apparatus for link adaptive multicast/broadcast transmission and reception

Provided are a method for using a flexible bandwidth in an orthogonal frequency division multiple access (OFDMA)-based cognitive radio system, and a base station (BS) and a subscriber station using the method. The method includes: allocating a channel band from among unused channel bands having a bandwidth that is a natural number times a bandwidth resolution to customer premises equipment (CPE), wherein the bandwidth resolution is a predetermined bandwidth smaller than a bandwidth of a broadcast channel band, and transmitting an OFDMA-based signal comprising band allocation information indicating information regarding the allocated channel band.

Method for using flexible bandwidth in OFDMA-based cognitive radio system, base station and subscriber station using the same

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Seongnam-si, South Korea

Yun Hee Kim