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    • 26. 发明授权
    • Transmission timing control method, base station apparatus and mobile station apparatus
    • 发送定时控制方法,基站装置和移动站装置
    • US08493961B2
    • 2013-07-23
    • US11813582
    • 2006-01-11
    • Atsushi MatsumotoSadaki FutagiKenichi MiyoshiDaichi ImamuraAkihiko Nishio
    • Atsushi MatsumotoSadaki FutagiKenichi MiyoshiDaichi ImamuraAkihiko Nishio
    • H04J3/06
    • H04L5/1469H04L5/023H04L27/2646H04L27/2655
    • A wireless communication method for improving the transmission efficiency in an upstream communication in OFDMA-TDD system or the like. An upstream transmission timing control part (108), which employs this method, controls, based on the OFDMA-TDD scheme, the transmission timings of a mobile station (#p) and a mobile station (#M) communicating with a base station (100). The upstream transmission timing control part (108) acquires information about the propagation delay times τp and τM of the mobile station (#p) and mobile station (#M). When the propagation delay time τp is shorter than the propagation delay time τM, the upstream transmission timing control part (108) decides the transmission timings of the mobile station (#p) and mobile station (#M) such that the timing at which the base station (100) starts receiving symbols from the mobile station (#p) in an upstream section is earlier, by αp times an OFDM symbol length (L) (where αp is a natural number), than the timing at which the base station (100) starts receiving symbols from the mobile station (#M) in the same section.
    • 一种用于在OFDMA-TDD系统中提高上行通信中的传输效率的无线通信方法等。 使用该方法的上行发送定时控制部(108)基于OFDMA-TDD方式,控制与基站通信的移动台(#p)和移动台(#M)的发送定时 100)。 上游发送定时控制部(108)获取关于移动台(#p)和移动台(#M)的传播延迟时间taup和tauM的信息。 当传播延迟时间taup比传播延迟时间ττ短时,上游发送定时控制部(108)决定移动台(#p)和移动台(#M)的发送定时, 基站(100)开始在上游部分中从移动站(#p)开始接收符号的时间早于基站的时间(alphap是自然数) (100)开始从同一部分的移动台(#M)接收符号。
    • 29. 发明授权
    • Radio transmitting apparatus and radio transmitting method
    • 无线发送装置和无线发送方法
    • US07961811B2
    • 2011-06-14
    • US12064698
    • 2006-08-25
    • Kenichi MiyoshiAkihiko NishioDaichi Imamura
    • Kenichi MiyoshiAkihiko NishioDaichi Imamura
    • H04L27/00H04L7/06H04L7/00H04J11/00H04J3/06
    • H04L27/2605H04L27/2607
    • A radio transmitting apparatus and method thereof wherein a guard interval (GI) having a variable length allows a radio receiving apparatus to precisely and easily obtain a symbol synchronization. A GI adding part adds a short GI or a long GI to the head of each of a plurality of data parts. In a case of adding the long GI, the GI adding part copies the symbols of a portion of a second data part, which immediately follows a first data part, including the rear of the second data part, and then adds the copied symbols to the head of the first data part, thereby providing a second GI. Moreover, the GI adding part copies the symbols to a portion of the first data part including the rear thereof, and then adds the copied symbols to the head of the second GI, thereby providing the first GI.
    • 一种无线发送装置及其方法,其中具有可变长度的保护间隔(GI)允许无线电接收装置精确且容易地获得符号同步。 GI添加部分向多个数据部分的每一个的头部添加短GI或长GI。 在添加长GI的情况下,GI附加部分复制第二数据部分的一部分的符号,该第二数据部分紧随第一数据部分,包括第二数据部分的后部,然后将复制的符号添加到 第一数据部分的头部,从而提供第二GI。 此外,GI附加部分将符号复制到包括其后面的第一数据部分的一部分,然后将复制的符号添加到第二GI的头部,从而提供第一GI。