Abstract:
본발명의목적은 LTE-Advanced 시스템에서 PUSCH 전송을위하여 2개의코드워드(codeword)가사용되어질때 단말의전송전력을제어하기위함이다. 본발명에서는각각의코드워드에대하여전력제어를하는방법들을제안한다. 또한 2개의코드워드사용에따라증가된전송전력이과도한셀 간섭을일으키지않도록하기위하여, 전송전력조정옵셋파라미터의사용을제안한다. 이옵셋파라미터는전송전력을증가시키는목적으로도이용할수 있다.
Abstract:
PURPOSE: An aperiodic SRS(Sound Retrieval System) transmission method is provided to prevent a collision between periodic SRS and aperiodic SRS by including an antenna for the aperiodic SRS. CONSTITUTION: A terminal aperiodically receives an SRS transmission request from a base station through an PDCCH(Physical Downlink Control CHannel). The terminal receives parameter information which is necessary for an aperiodic SRS transmission step by using a PPCCH signal and RRC(Radio Resource Control) signal(101). The terminal establishes a parameter which is necessary for a SRS transmission step(103). The terminal transmits an aperiodic SRS signal from a sub frame which receives the aperiodic SRS transmission request to the base station(104).
Abstract:
본 발명은 무선 통신 시스템에서 UL MIMO를 적용하기 위한 송수신 방법에 관한 것으로, 별도의 PDCCH 제어신호가 없이 PHICH에 의해 PUSCH의 재전송이 이루어 질 경우 사전부호화 행렬을 결정하는 방법을 제안한다. PDCCH는 초기 전송이나 재전송에서 사용할 구체적인 전송 특성을 지시할 수 있는 장점이 있는 반면, 정보량이 많아서 제어정보를 통보하기 위해 더 많은 자원을 소비해야 하는 단점이 있다. 예를 들어 LTE 시스템의 경우 UL에서는 PDCCH를 송신하는 경우를 줄일 수 있도록 적응형 동기식 HARQ를 채택하고 있으므로 PHICH만으로 재전송을 지시하는 방법이 제공되어야 한다. UL MIMO 방식에서는 PDCCH 없이 PHICH만으로 요청된 재전송에서 사용할 사전부호화 방식이 정의될 경우 PDCCH에 의한 자원 소비를 방지할 수 있다. 그러나 종래 방법에 따르면 사전부호화 방식을 통보하기 위해 PDCCH를 반드시 전송해야 한다. 이러한 문제를 해결하기 위해 본 발명에서는, PUSCH의 재전송시 미리 약속된 precoding 행렬이나 precoding 행렬 후보군인 재전송용 코드북에서 특정한 규칙에 의해 선택된 precoding 행렬을 이용하여 precoding을 수행하는 방법을 제안한다.
Abstract:
PURPOSE: A reference signal transmission method and apparatus thereof are provided to reduce error of a channel state for transmitting data to the terminal. CONSTITUTION: A terminal sets up offset which is similar to average feedback delay according to a sub frame for transmitting a reference signal. All base stations transmit the reference signal to the same offset. The terminal sets up offset so that the transmission time of the reference signal be transmitted the other subframe(950).
Abstract:
PURPOSE: A device and method for processing a channel state measurement reference signal of a wireless communication system are provided to efficiently use the transmission power of all antenna ports. CONSTITUTION: A first OFDM(Orthogonal Frequency Division Multiplexing) symbol and a second OFDM transmit a CSI-RS(Channel State Information-Reference Signal). Partial PRBs transmit the CSI-RS within a system bandwidth. The partial PRBs are transmitted in a first CSI-RS pattern type. The other PRBs are transmitted in a second CSI-RS pattern type. The first CSI-RS pattern type transmits a CSI-RS about first antenna ports in a first OFDM symbol. The second CSI-RS pattern type transmits a CSI-RS about second antenna ports in a second OFDM symbol.
Abstract:
PURPOSE: A communication method using a code book in an MIMO system and an apparatus thereof are provided to have a matrix structure of a power ratio by the same layer, thereby preventing a PAPR(Peak-to-Average Power Ratio) increase. CONSTITUTION: An apparatus maps at least two code words on a plurality of layers(103). The apparatus maps each layer on antennas based on a precoding matrix selected from a code book(105). The apparatus multiplies values corresponding to coefficients of the selected precoding matrix when the layers are mapped on the antennas(106).
Abstract:
PURPOSE: An uplink transmission device for a mobile communication system and a method thereof are provided to transmit UCI(Uplink Control Information) transmitted to two code words mapped on multiple layers in an uplink channel of an LTE-A(Long Term Evolution-Advanced). CONSTITUTION: A transmission path circuit transmits uplink grant to a subscriber terminal. A reception path circuit receives an MIMO(Multiple Input Multiple Output) uplink sub-frame from the subscriber terminal. The MIMO uplink sub-frame includes layers of a first sub-set and layers of a second sub-set. The layers of the first sub-set are used for transmitting the first code word. The layers of the second sub-set are used for transmitting the second code word. [Reference numerals] (701) FFT converter; (702) Demapper(Resource element demapper); (703) Deprecoder; (704) IDFT converter; (705) Mapper(Layer to codeword mapping part); (706) Demodulation unit(Demodulation demapper); (707) Descrambler; (708) Deinterleaver; (709) Decoder