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    • 41. 发明公开
    • WIRELESS BASE STATION DEVICE, WIRELESS COMMUNICATION SYSTEM, AND WIRELESS COMMUNICATION METHOD
    • DRAHTLOSE BASISSTATIONSVORRICHTUNG,DRAHTLOSES KOMMUNIKATIONSSYSTEM UND DRAHTLOSES KOMMUNIKATIONSVERFAHREN
    • EP2790342A1
    • 2014-10-15
    • EP12854823.7
    • 2012-11-16
    • NTT DOCOMO, INC.
    • KAKISHIMA, YuichiNAGATA, SatoshiTAOKA, HidekazuKUSUME, Katsutoshi
    • H04J99/00H04B7/04H04B7/06H04B7/10H04J11/00
    • H04B7/0615H04B7/0456H04B7/0469H04B7/0617H04B7/065H04B7/0691
    • The present invention is designed to implement radio communication to maintain good communication quality even when the number of antennas provided in a radio base station apparatus is greater than the number of transmission layers of a downlink control channel, a broadcast channel, and cell-specific reference signals. When, from a radio base station apparatus (200) having a plurality of transmitting antennas, at least one of a downlink control channel, a broadcast channel and a cell-specific reference signal is transmitted with fewer transmission layers than the number of all transmitting antennas, a smaller number of antennas than the number of all transmitting antennas are made virtual in a precoding weight multiplication section (205), and also transmission weights that make the average transmission power of the transmitting antennas or transmission streams the same are multiplied, and the signals multiplied by the transmission weights are transmitted from the transmitting antennas on the downlink.
    • 本发明被设计成即使在无线基站装置中设置的天线的数量大于下行链路控制信道,广播信道,小区特定基准的发送层数的情况下,也能够实现无线通信,以保持良好的通信质量 信号。 当从具有多个发送天线的无线基站装置(200)发送下行链路控制信道,广播信道和小区特定参照信号中的至少一个时,发送次数少于所有发送天线的数量 在预编码权重乘法部分(205)中,使虚拟的所有发送天线的数量少于数量的天线,并且使发送天线或发送流的平均发送功率相同的发送权重相乘,并且 在下行链路上从发送天线发送乘以发送权重的信号。
    • 46. 发明公开
    • RADIO BASE STATION APPARATUS AND MODULATING/CODING SCHEME SELECTING METHOD
    • 国际调查组织(VUNBASISSTATIONVORRICHTUNG UND MODULATIONS- / CODIERUNGSSCHEMAAUSWAHLVERFAHREN)
    • EP2456111A1
    • 2012-05-23
    • EP10799739.7
    • 2010-07-01
    • NTT DOCOMO, INC.
    • TAOKA, HidekazuSAWAHASHI, Mamoru
    • H04J99/00H04B7/04H04J11/00H04W16/28H04W28/18
    • H04L1/0026H04B7/0417H04B7/0632H04L1/0003H04L1/0009H04W88/08
    • It is an object of the present invention to reduce a probability that MCSs including different modulation schemes may be selected and thereby improve a throughput characteristic of an entire system. The present invention includes a CQI information decoding section (101) that decodes a CQI of a downlink transmission stream and an MCS selection section (102) that includes a table (MCS table 1021) that defines a modulation/coding scheme (MCS) according to the CQI of the downlink transmission stream and defines modulation/coding scheme groups including the same modulation scheme and defined so that transmission rates are arranged in ascending order in each of the modulation/coding scheme groups, and selects an MCS of the downlink transmission stream based on the CQI of the downlink transmission stream decoded by the CQI information decoding section (101).
    • 本发明的目的是降低可以选择包括不同调制方案的MCS,从而提高整个系统的吞吐量特性的概率。 本发明包括对下行链路传输流的CQI进行解码的CQI信息解码部(101)以及包含表(MCS表1021)的MCS选择部(102),所述表(MCS表1021)根据 下行链路传输流的CQI,并定义包含相同调制方式的调制/编码方案组,并定义为在每个调制/编码方案组中按升序排列传输速率,并选择下行传输流的MCS 关于由CQI信息解码部(101)解码的下行链路发送流的CQI。
    • 50. 发明公开
    • MOBILE TERMINAL APPARATUS AND RADIO BASE STATION APPARATUS
    • MOBILESENDGERÄTUNDFUNBASISSTATIONSGERÄT
    • EP2346279A1
    • 2011-07-20
    • EP09824744.8
    • 2009-10-29
    • NTT DOCOMO, INC.
    • KISHIYAMA, YoshihisaTAOKA, HidekazuTANNO, Motohiro
    • H04W24/10H04B7/04H04J11/00H04J99/00H04W16/28H04W72/12
    • H04W72/1226H04W72/1278
    • There is provided a mobile terminal apparatus and a radio base station apparatus capable of transmitting a downlink signal using an optimum feedback parameter even when a control delay exists and improving throughput characteristics of a downlink channel. A mobile terminal apparatus (1) measures a feedback parameter for a radio base station apparatus (3) using a received signal, obtains a feedback value, predicts a feedback parameter after a control delay in which the feedback value is reflected on transmission of a downlink shared channel to obtain a feedback predicted value, transmits the feedback predicted value to the radio base station apparatus, and the radio base station apparatus (3) selects a precoding weight of MIMO channel transmission using the feedback predicted value and schedules the downlink shared channel using the feedback predicted value.
    • 提供一种移动终端装置和无线基站装置,即使在存在控制延迟的情况下也能够使用最佳反馈参数来发送下行链路信号,并提高下行链路信道的吞吐量特性。 移动终端装置(1)使用接收信号测量无线基站装置(3)的反馈参数,获得反馈值,在反馈值反映在下行链路的传输的控制延迟之后,预测反馈参数 共享信道以获得反馈预测值,将反馈预测值发送到无线基站装置,无线基站装置(3)使用反馈预测值选择MIMO信道发送的预编码权重,并使用 反馈预测值。