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23 条记录 (耗时 0.012 秒)

    Code division multiple access mobile communication system.
    12.
    发明授权
    Code division multiple access mobile communication system. 有权
    与Kodeverteilung多址接入方法的移动通信设备

    公开(公告)号：EP0957594B1

    公开(公告)日：2005-04-27

    申请号：EP99102816.8

    申请日：1999-02-26

    申请人： Hitachi, Ltd.

    发明人： Suzuki, May ,  Doi, Nobukazu ,  Yano, Takashi

    IPC分类号： H04B7/26

    CPC分类号： H04B1/70735 ,  H04B1/7075 ,  H04B1/708 ,  H04B1/7083 ,  H04B7/2628 ,  H04B7/2668

    摘要： The present invention relates to a cell search method for a code division multiple access mobile communication system, comprising: transmitting, from a base station, a control signal via perch channels (106, 107), said perch channels being formed such that a long period code assigned to said base station and a first short period code are mapped in a first section (102) of one slot of said perch channel; and transmitting, from said base station, a predetermined short period code mapped in a second section (131) of said one slot. Said predetermined short period code is provided for use by a mobile terminal for performing cell search by calculating a correlation value for said second section of said one slot. Said predetermined short period code is transmitted plural times within said second section of said one slot.

    A cell search method and a base station for a code division multiple access mobile communication system
    13.
    发明公开
    A cell search method and a base station for a code division multiple access mobile communication system 有权
    的CDMA移动通信系统中的小区搜索方法和基站

    公开(公告)号：EP1473854A3

    公开(公告)日：2004-11-10

    申请号：EP04017498.9

    申请日：1999-02-26

    申请人： Hitachi, Ltd.

    发明人： Suzuki, May ,  Doi, Nobukazu ,  Yano, Takashi

    IPC分类号： H04B7/26

    CPC分类号： H04B1/70735 ,  H04B1/7075 ,  H04B1/708 ,  H04B1/7083 ,  H04B7/2628 ,  H04B7/2668

    摘要： The present invention relates to a cell search method for a code division multiple access mobile communication system, comprising: transmitting, from a base station, a control signal via perch channels (106, 107), said perch channels being formed such that a long period code assigned to said base station and a first short period code are mapped in a first section (102) of one slot of said perch channel; and transmitting, from said base station, a predetermined short period code mapped in a second section (131) of said one slot. Said predetermined short period code is provided for use by a mobile terminal for performing cell search by calculating a correlation value for said second section of said one slot. Said predetermined short period code is transmitted plural times within said second section of said one slot.

    Code division multiple access mobile communication system.
    15.
    发明公开
    Code division multiple access mobile communication system. 有权
    移动通讯社（Kommunikationsanordnung mit Kodeverteilung Mehrfachzugriffsverfahren）

    公开(公告)号：EP0957594A2

    公开(公告)日：1999-11-17

    申请号：EP99102816.8

    申请日：1999-02-26

    申请人： Hitachi, Ltd.

    发明人： Suzuki, May ,  Doi, Nobukazu ,  Yano, Takashi

    IPC分类号： H04B7/26

    CPC分类号： H04B1/70735 ,  H04B1/7075 ,  H04B1/708 ,  H04B1/7083 ,  H04B7/2628 ,  H04B7/2668

    摘要： In a mobile communication system using a code division multiple access (CDMA) method, spreading code detection and frame/slot timing synchronization (cell search) is conducted by using a long code masked symbol (CSC 132, GISC 133). The spreading factor of the long code masked symbol is set to a value lower than spreading factors of other ordinary symbols. As a result, it becomes possible to reduce the circuit scale and power dissipation of the mobile terminal and raise the speed of cell search.

    摘要翻译： 在使用码分多址（CDMA）方法的移动通信系统中，通过使用长码屏蔽符号（CSC 132，GISC 133）进行扩展码检测和帧/时隙定时同步（小区搜索）。 长码屏蔽符号的扩展因子被设置为低于其他普通符号的扩展因子的值。 结果，可以减少移动终端的电路规模和功耗，提高小区搜索的速度。

    Transmission power control method for a CDMA communication system
    20.
    发明公开
    Transmission power control method for a CDMA communication system 失效
    一种用于控制发射机功率的CDMA消息传输系统的方法

    公开(公告)号：EP0847147A3

    公开(公告)日：2000-08-30

    申请号：EP97121324.4

    申请日：1997-12-04

    申请人： Hitachi, Ltd.

    发明人： Tsunehara, Katsuhiko ,  Yano, Takashi ,  Doi, Nobukazu ,  Uta, Takaki ,  Hasegawa, Keiji

    IPC分类号： H04B7/005 ,  H04B7/216

    CPC分类号： H04W52/54 ,  H04W52/146 ,  H04W52/245 ,  H04W52/58 ,  H04W88/08

    摘要： An uplink channel transmission power control method is provided for a CDMA mobile communication system performing one way communication. A base station (203) measures the received level of data transmitted from each mobile terminal (204) at each channel, and generates a transmission power control signal of each uplink traffic channel. The generated transmission power control signals are multiplexed, and the multiplexed common transmission power control signal is transmitted to all mobile terminals by using the common channel shared by the mobile terminals. Each mobile terminal derives the transmission power control signal of the uplink traffic channel used by the terminal, from the received common transmission power control signal, and controls the transmission power of a data packet.