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    • 63. 发明授权
    • Cell search method and apparatus for mobile station in mobile communication system
    • 移动通信系统中移动台的小区搜索方法和装置
    • US06961565B2
    • 2005-11-01
    • US09954956
    • 2001-09-18
    • Motohiro TannoTakehiro Nakamura
    • Motohiro TannoTakehiro Nakamura
    • H04B1/707H04B1/7083H04W36/00H04W36/36H04Q7/20
    • H04B1/7075H04B1/70735H04B1/7083H04B1/709
    • The present invention reduces the time required for cell search and increase the accuracy of the cell search by determining, during selection of frame boundaries and a scramble code, whether or not the selection results are correct. A mobile station causes descramblers to descramble a received signal with eight scramble codes. Then, correlators calculate the phases of the scramble codes on the basis of frame boundaries, and despreads the signal with a spreading code for a CPICH. The mobile station performs this operation over a plurality of symbols, and causes averaging process sections to average the results. Then, a peak detector selects a scramble code with which an average correlation coefficient is largest. This maximum average correlation coefficient is output to a detection results judging section, which then calculates the ratio of this value to a reference value calculated inside the mobile station, thereby judging detection results.
    • 本发明通过在选择帧边界和扰码期间确定选择结果是否正确来减少小区搜索所需的时间并增加小区搜索的准确性。 移动站使得解扰器用八个扰码解扰接收到的信号。 然后,相关器基于帧边界计算扰码的相位,并用CPICH的扩展码解扩信号。 移动台通过多个符号执行该操作,并使得平均处理部分对结果进行平均。 然后,峰值检测器选择平均相关系数最大的扰码。 该最大平均相关系数被输出到检测结果判定部,检测结果判定部根据该检测结果判定部计算该值与移动台内计算出的基准值的比例,判断检测结果。
    • 68. 发明授权
    • Method and apparatus for switching radio links in mobile communication
    • 用于在移动通信中切换无线电链路的方法和装置
    • US5740168A
    • 1998-04-14
    • US448342
    • 1995-06-12
    • Takehiro NakamuraNarumi UmedaAkira Hiroike
    • Takehiro NakamuraNarumi UmedaAkira Hiroike
    • H04B7/26H04W36/08H04W56/00H04J3/16
    • H04W36/0072H04W36/06H04W56/00
    • A radio link switching scheme in which a communication between the base station and the mobile station is carried out through the radio link given in terms of frames while providing a switching timing information formed by a layer 1 bit data in each frame of the radio link such as a unique word, a flag, a housekeeping bit, and a frame number. Then, the switching timing information in at least one of the frames of the radio link at the base station is changed to indicate a switching of the radio link whenever a need for switching the radio link between the base station and the mobile station arises, and transmitted to the mobile station. At the base station, the radio link is switched at a switching timing which is a prescribed period of time after each frame in which the switching timing information is changed, while at the mobile station the radio link is switched at a switching timing which is a predetermined period of time after each frame in which the changed switching timing information is detected.
    • PCT No.PCT / JP94 / 01708 Sec。 371日期:1995年6月12日 102(e)1995年6月12日PCT PCT 1994年10月13日PCT公布。 公开号WO95 / 10920 PCT 日期1995年04月20日一种无线电链路交换方案,其中通过在帧中给出的无线电链路来执行基站和移动台之间的通信,同时提供由每帧中的第1层数据形成的切换定时信息 诸如唯一字,标志,管理位和帧号的无线电链路。 然后,当基站和移动站之间的无线链路切换的需要出现时,在基站处的无线链路的至少一个帧中的切换定时信息被改变,以指示无线电链路的切换,以及 传输到移动台。 在基站中,在切换定时信息变化的每帧之后的规定时间段的切换定时切换无线链路,而在移动台,无线链路以切换定时切换为切换定时 在检测到改变的切换定时信息的每帧之后的预定时间段。