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    • 62. 发明授权
    • Data transmission method and data transmission apparatus
    • 数据传输方法和数据传输装置
    • US07619976B2
    • 2009-11-17
    • US11023492
    • 2004-12-29
    • Katsuya Yamamoto
    • Katsuya Yamamoto
    • G01R31/08H04B7/00
    • H04L1/0019H04L1/1607H04L1/1812H04L1/1838H04L1/187H04L1/188
    • When retransmission requests are issued based on the results of error-correction decoding of received data packets to perform data transmission, statistical information indicating whether received data packets have been successfully decoded or have not been decoded is acquired, and based on the rate at which correct decoding has been made or the rate at which correct decoding has not been made, which is obtained from the statistical information, a request is transmitted to the transmission source to change the window size, which is the number of data units handled in a predetermined layer, so that when for example the communication environment is not excellent, processing can be performed at a small window size, and the occurrence of circumstances in which data retransmission and the discarding of received data are repeated can be efficiently prevented. Accordingly, data transmission efficiency in a wireless transmission system performing high-speed data transmission is improved under conditions of a poor radio wave environment.
    • 当基于接收到的数据分组的纠错解码的结果发出重发请求以进行数据传输时,获取表示接收到的数据分组是否已被成功解码或未被解码的统计信息,并且基于正确的速率 已经进行了解码或从统计信息获得的没有进行正确解码的速率,将请求发送到发送源以改变窗口大小,窗口大小是在预定层中处理的数据单元的数量 因此,例如在通信环境不优异的情况下,能够以小的窗口大小进行处理,能够有效地防止重发数据和丢弃接收到的数据的情况的发生。 因此,在差的无线电波环境的条件下,提高了执行高速数据传输的无线传输系统中的数据传输效率。
    • 67. 发明授权
    • Receiving apparatus and receiving method
    • 接收装置和接收方法
    • US06507571B1
    • 2003-01-14
    • US09108342
    • 1998-06-30
    • Katsuya Yamamoto
    • Katsuya Yamamoto
    • H04J306
    • H04B1/70752H04B1/70754H04B1/70757H04B2201/70701
    • A receiving apparatus is used in a mobile communication system transmits and receives spread spectrum signals between a base station and a mobile station, in which the timing detection region of a spread spectrum signal is set in accordance with the intermittent receiving period. If it is difficult for the mobile station to establish synchronization with the base station over a long intermittent receiving period due to errors accumulated in the oscillator of the mobile station, the window serving as the search area is expanded. Accordingly, the capability of detecting the timing is increased, and errors of the oscillator are compensated. Thus a, re-synchronizing operation and intermittent receiving operation are reliably performed. As a consequence, even by the use of a low-precision and simple-structured oscillator in the mobile station, a low-powered receiving apparatus in which an intermittent receiving operation having a longer period is provided.
    • 在移动通信系统中使用接收装置,在基站与移动台之间发送和接收扩频信号,其中根据间歇接收周期设置扩频信号的定时检测区域。 如果由于移动站的振荡器中存在的错误,移动台难以在长时间间歇接收周期内与基站建立同步,所以作为搜索区域的窗口被扩展。 因此,检测定时的能力增加,并且补偿了振荡器的误差。 因此,可以可靠地执行重新同步操作和间歇接收操作。 结果,即使通过在移动台中使用低精度和简单结构的振荡器,也提供了具有较长周期的间歇接收操作的低功率接收装置。
    • 69. 发明授权
    • Method and apparatus for selecting a base station based on a timing
value obtained from a system timing signal
    • 基于从系统定时信号获得的定时值来选择基站的方法和装置
    • US6052602A
    • 2000-04-18
    • US966179
    • 1997-11-07
    • Katsuya Yamamoto
    • Katsuya Yamamoto
    • H04J13/00H04B1/7073H04W24/00H04W36/18H04W48/20H04W52/02H04W76/02H04Q7/32
    • H04W48/20H04W24/00H04W36/18H04W52/0229
    • A base station selecting method, a reference signal receiving method, and a subscriber apparatus by which base stations to be monitored can be efficiently selected with a simple structure, wherein a pilot signal detector includes a counter member for counting prescribed time information; a selecting member for selecting a base station for detecting a pilot signal for each frame forming a spectrum diffusion signal based on the value of the time information; and a detecting member for detecting the timing of the pilot signal transmitted from the base station selected by the selecting member. The base stations are selected for each frame based on the prescribed time information and the timings of the selected base stations are detected. Therefore, the number of the base stations to be monitored during a detection of a timing for one can be minimized as required and a consumed electric power corresponding to the number of times of the detection of timings can be lowered.
    • 基站选择方法,参考信号接收方法和用户装置,通过这样一种简单的结构可以有效地选择待监视的基站,其中导频信号检测器包括用于计数规定时间信息的计数器构件; 选择构件,用于基于所述时间信息的值,选择用于检测形成频谱扩散信号的每个帧的导频信号的基站; 以及检测部件,用于检测由选择部件选择的从基站发送的导频信号的定时。 基于规定的时间信息为每个帧选择基站,并且检测所选择的基站的定时。 因此,可以根据需要最小化在检测到一个定时期间要监视的基站的数量,并且可以降低与定时检测次数相对应的消耗电力。
    • 70. 发明授权
    • Method and apparatus for detecting pilot signals and subscriber
    • 用于检测导频信号和用户的方法和装置
    • US5966402A
    • 1999-10-12
    • US746873
    • 1996-11-18
    • Katsuya Yamamoto
    • Katsuya Yamamoto
    • H04B1/69H04B1/709H04B7/26H04L7/00H04W48/16H04W56/00H04B15/00H04K1/00H04L27/30
    • H04B1/707
    • A pilot signal detection method, a pilot signal detection apparatus and a subscriber in which the timing of a pilot signal of a neighbor base station is detected correctly and efficiently for improving the quality of communication of a mobile station. Partial correlation is taken of a pilot signal of an arbitrary base station within a first range of correlation. The pilot signal for which the result of the partial correlation has exceeded a first threshold becomes a pilot candidate signal for detection. Partial correlation is then taken of the pilot signal of the pilot candidate signal within a range of correlation broader than the first range of correlation. The pilot signal for which the result of the partial correlation has exceeded a second threshold becomes a pilot detection signal.
    • 导频信号检测方法,导频信号检测装置和用户,其中正确有效地检测相邻基站的导频信号的定时,以提高移动台的通信质量。 在第一相关范围内对任意基站的导频信号进行部分相关。 部分相关的结果超过第一阈值的导频信号成为用于检测的导频候选信号。 然后在相关范围内的导频候选信号的导频信号中进行部分相关,其宽度大于第一相关范围。 部分相关的结果超过第二阈值的导频信号成为导频检测信号。