Abstract:
PURPOSE: A control channel search method for multiple antennas and a device thereof are provided to effectively receive control channel transmission using different transmission methods or different reference signals. CONSTITUTION: A scheduler(917) generates an ePDCCH(evolved Physical Dedicated Control Channel) configuration information located in a data area. The scheduler transmits the generated ePDCCH configuration information to the terminal through upper signaling. An ePDCCH generation unit(907) configures an ePDCCH by using the configuration information. A transmission unit transmits the configured ePDCCH. The scheduler assigns different transmission methods for classified control channel. The scheduler transmits the determined channel classification and the assigned transmission method to the terminal through the upper signaling.
Abstract:
PURPOSE: A feedback transceiving method in a communication system and a device thereof are provided to generate types, cycles, and timings of each feedback information when using a JT(Joint Transmission) method and a DB(Dynamic cell Blanking) method by considering a multi CSI(Channel Status Information) feedback case. CONSTITUTION: A communication unit(710) transceives data with a central control device and two or more cells managed by the central control device. A control unit(720) controls the communication unit to receive a CSI-RS(Reference Signal) from the cells. The control unit controls the communication unit to receive a feedback parameter including feedback timing information and a feedback mode for CSI feedback. The control unit controls the communication unit to transmit channel information generated in each cell to the central control device according to the feedback timing information and the feedback mode. [Reference numerals] (710) Communication unit; (720) Control unit; (730) Channel estimation unit;
Abstract:
본 발명은 이동통신시스템에서 이동 단말로부터 피드백 되는 채널 품질 정보를 기반으로 기지국이 적응 변조 및 부호화와 채널 감응 스케줄링을 수행하는 장치 및 방법에 관한 것이다. 이를 위해, 기지국이 트래픽/파일럿 비율을 측정하고, 상기 측정한 트래픽/파일럿 비율과 기준 값의 비교 결과에 의해 생성한 트래픽/파일럿 비율 조정 명령을 이동 단말로 전송한다. 상기 이동 단말은 상기 기지국으로부터 수신한 트래픽/파일럿 비율 조정 명령에 의해 채널 품질 정보를 선별적으로 전송한다. 상기 기지국은 상기 이동 단말로부터 수신한 채널 품질 정보를 기반으로 적응 변조 및 부호화와 채널 감응 스케줄링을 수행한다. HRPD, ACM, OFDM, HSPDA, CQI
Abstract:
PURPOSE: A feedback transmission and reception method for cooperative communication and apparatus thereof are provided to effectively operate a CoMP(cooperative multi-point) method by constructing the simple CoMP method based on an LTE-A(long term evolution-advanced) system. CONSTITUTION: When a terminal is a cooperative transmission terminal, a control unit(820) estimates each channel from a plurality of cells by using a reference signal for channel information in a measurement group. The measurement group includes one or more resources allocated for estimating each channel from a plurality of cells. The control unit calculates signal-to-interference ratio in a cell according to the estimated channel. The control unit selects an optimal cell. A communication unit(810) transmits channel information related to an index of an optimal cell selected by the control unit. [Reference numerals] (810) Communication unit; (820) Control unit; (830) Channel estimation unit
Abstract:
PURPOSE: A method for generating a reference signal in a cellular mobile communication system and an apparatus thereof are provided to improve a mobile communication service in comparison with a CAS(Central Antenna System) by evenly distributing antennas to cell service areas. CONSTITUTION: A central antenna(401) of a base station is arranged in the center within a cell(400) using DAS(Distributed Antenna System). Distributed antennas(410,411,412,413,414,415) of the base station are dispersively arranged in the entire service area. An UE(User Equipment) 1(420) receives down link information through the distributed antennas. An UE 2(421) receives the down link information through the distributed antenna. Two or more scrambling variables are determined for each user terminal. A reference signal progression for demodulation is generated by combining the scrambling variables. The reference signal progression for the demodulation is transmitted through each antenna.
Abstract:
PURPOSE: A channel state information transmission and reception method in a mobile communication system and apparatus thereof are provided to effectively supporting the operation of a wireless communication system by effectively transmitting and receiving channel state information for a centralized antenna of a CAS(Central Antenna System). CONSTITUTION: A wireless processing unit wirelessly contacts with a base station. A reception strength processing unit transmits reception strength information for antennas arranged and distributed in a service area of a base station to the base station by measuring the reception strength information. When the base station is determined by the antennas, a channel state information processing unit transmits channel state information corresponding to the determined antenna to a base station by measuring the channel state information.
Abstract:
PURPOSE: A channel state information feedback transmission apparatus and method thereof are provided to effectively give feedback on downlink channel state information by using restricted information amount in a DAS(Distributed Antenna System) transmission structure. CONSTITUTION: A candidate AP(Access Point) group determination unit(24) determines a candidate AP group by using slow fading from antenna ports. An activated AP group determination unit(26) selects an activated AP group by using fast fading in the candidate AP group. A transmission and reception apparatus gives feedback for the downlink channel state information of activated AP, an activated AP group, and candidates to a transmission unit. The reception apparatus includes a downlink channel estimation apparatus and a long-term channel gain estimation apparatus.
Abstract:
본 발명은 이동통신 시스템에서 송신되는 서비스 트래픽을 수신하기 위한 장치 및 방법에 관한 것으로, 특히 이동통신 시스템에서 송신되는 방송(Broadcast and Multicast) 서비스 트래픽을 수신하기 위한 장치 및 방법에 관한 것이다. 본 발명에서는 전송 횟수에 따라 다르게 전송되는 방송 서비스 데이터를 효과적으로 수신할 수 있고, 목적은 이동통신 시스템에서 각 영역에 적응적인 방송 송신을 제공하며, 이에 따른 수신 장치 및 방법을 제공한다. BCMCS, 변조 보상, 신호대 잡음비 보상
Abstract:
본 발명은 무선 통신 시스템에서 자원 할당을 위한 하향링크 제어 지시 방법 및 장치에 관한 것으로서, 본 발명의 무선 통신 시스템에서 기지국의 하향링크 제어 정보 전송 방법은 데이터 자원 할당 지시자, 적어도 하나의 전송 블록에 대한 데이터 포맷 지시자 또는 상기 전송 블록에 대응하는 복조 기준 신호(DMRS) 자원 할당 지시자 중 적어도 하나를 포함하는 하향링크 제어 정보를 생성하는 단계 및 상기 생성된 하향링크 제어 정보를 단말에 전송하는 단계를 포함하는 것을 특징으로 한다. 본 발명에 따르면, 보다 적은 비트 수를 통해 보다 많은 사용자에 대한 제어 정보를 전송할 수 있다.
Abstract:
PURPOSE: A method and device for communicating a layer shifting are provided to supply the number of antenna used for transmitting CW#2 and the number of antenna used for transmitting CW#1 as same. CONSTITUTION: A CW to layer mapper(301) maps each of a plurality of coding words in at least one layer. An MIMO precoder(314) transmits at least one layer especially mapped per plurality of codeword by the layer mapper through the same number of antenna. A layer shifter(307) rearranges mapped layers about each of a plurality of coding words by the layer mapper. The layer shifter provides the rearranged layers to the MIMO precoder.