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88 条记录 (耗时 0.018 秒)

    Cell search control method, mobile station and mobile communications system
    1.
    发明授权
    Cell search control method, mobile station and mobile communications system 有权
    该方法中，移动台和通信系统，用于控制小区搜索

    公开(公告)号：EP1729530B1

    公开(公告)日：2013-05-29

    申请号：EP06076660.7

    申请日：2000-07-11

    申请人： NTT DOCOMO, INC.

    发明人： Ishikawa, Yoshihiro ,  Imai, Tetsuro ,  Sawahashi, Mamoru ,  Onoe, Seizo

    IPC分类号： H04W48/16 ,  H04W36/32

    CPC分类号： H04W48/16 ,  H04W36/32 ,  Y02D70/00

    摘要： A cell search control method, a mobile station and a mobile communications system can save consumption power with maintaining high accuracy for selecting a base station. The mobile station measures receiving quality (highest received power and the like) of a currently captured perch channel of a base station; automatically makes a decision as to whether the mobile station is located at a cell periphery in which the need for searching for a new perch channel is great, or located in neighborhood of a base station in which the need is little; and increases the frequency of the search at a location where the need is great and decreases it at a location where the need is little.

    Traffic channel selecting method and base station equipment
    2.
    发明公开
    Traffic channel selecting method and base station equipment 有权
    基站和方法，用于选择一个业务信道

    公开(公告)号：EP1435744A8

    公开(公告)日：2012-06-20

    申请号：EP04075096.0

    申请日：1999-01-28

    申请人： NTT DoCoMo, Inc.

    发明人： Ishikawa, Yoshihiro ,  Onoe, Seizo ,  Nakano, Etsuhiro c/o NTT DoCoMo, Inc. ,  Ishii, Minami ,  Hata, Masafumi

    IPC分类号： H04Q7/36 ,  H04B7/005

    CPC分类号： H04W16/10 ,  H04W16/32 ,  H04W24/02 ,  H04W52/40 ,  H04W72/02

    摘要： A decision is made as to whether a radio base station acting as an interference source is present in a macrocell or microcell, so that the interference from a mobile station transmitting at high power can be prevented in advance. The base station inserts its transmission power value of a forward broadcast channel into broadcast information. A newly installed base station C, receiving a forward frequency band, measures the received level of the broadcast channel, and captures the transmitted power value.
    A propagation loss is calculated from the received level of the broadcast channel and the transmission power value acquired, and a decision is made that the channel is available, if the propagation loss is less than a certain value, and the received level is less than the threshold value.

    Fading frequency decision device and method
    5.
    发明授权
    Fading frequency decision device and method 有权
    装置和方法的衰落频率判定

    公开(公告)号：EP1816753B1

    公开(公告)日：2009-11-25

    申请号：EP07075319.9

    申请日：2000-03-31

    申请人： NTT DoCoMo, Inc.

    发明人： Okumura, Yukihiko c/o NTT DoCoMo, Inc. ,  Ando, Hidehiro ,  Usuda, Masafumi c/o NTT DoCoMo, Inc. ,  Ishikawa, Yoshihiro ,  Onoe, Seizo c/o NTT DoCoMo, Inc.

    IPC分类号： H04B1/707 ,  H04J13/04 ,  H04L27/01 ,  H04B7/26 ,  H04W16/00 ,  H04L25/02

    CPC分类号： H04L25/0234 ,  H04B1/707 ,  H04B1/7115 ,  H04B2201/70701 ,  H04L25/0228

    摘要： In this invention, a channel estimation value of data symbols of a data channel is calculated by weighting and averaging pilot symbols in a parallel time multiplexing method. Also, a channel estimation value of data symbols during each data symbol interval is calculated by dividing data symbols in a slot into a plurality of data symbol intervals, selecting pilot symbols suitable for calculation of a channel estimation value of data symbols during each data symbol interval and weighting and averaging that pilot symbols. Also, a fading frequency is detected based on an inner product value of pilot symbols. Weighting factors are changed based on the detected fading frequency. Also, a channel estimation value is calculated by weighting and averaging pilot signals using a plurality of weighting sequences. The calculated channel estimation value is used to demodulate received data. The output data with the highest quality is selected by judging reliability of these plurality of demodulated data. It is also possible to select some weighting sequences based on the result of the reliability judgment of the demodulated data for predetermined period of time. In this case, after the selection, demodulation is performed by using these selected weighting sequences only.

    Cell search control method, mobile station and mobile communications system
    8.
    发明公开
    Cell search control method, mobile station and mobile communications system 有权
    Verfahren，移动站和社区系统zur Steuerung der Zellsuche

    公开(公告)号：EP1729530A3

    公开(公告)日：2007-12-26

    申请号：EP06076660.7

    申请日：2000-07-11

    申请人： NTT DoCoMo INC.

    发明人： Ishikawa, Yoshihiro ,  Imai, Tetsuro ,  Sawahashi, Mamoru ,  Onoe, Seizo

    IPC分类号： H04Q7/32 ,  H04Q7/38

    CPC分类号： H04W48/16 ,  H04W36/32 ,  Y02D70/00

    摘要： A cell search control method, a mobile station and a mobile communications system can save consumption power with maintaining high accuracy for selecting a base station. The mobile station measures receiving quality (highest received power and the like) of a currently captured perch channel of a base station; automatically makes a decision as to whether the mobile station is located at a cell periphery in which the need for searching for a new perch channel is great, or located in neighborhood of a base station in which the need is little; and increases the frequency of the search at a location where the need is great and decreases it at a location where the need is little.

    摘要翻译： 小区搜索控制方法，移动站和移动通信系统可以在保持用于选择基站的高精度的情况下节省消耗功率。 移动站测量基站当前捕获的导频信道的接收质量（最高接收功率等）; 自动决定移动台是否位于其中需要搜索新的导频信道很大的小区外围，或者位于需要很少的基站的附近; 并且在需要很大的位置增加搜索的频率，并且在需要很小的位置减少搜索的频率。

    Channel allocation method and mobile communication system
    9.
    发明公开
    Channel allocation method and mobile communication system 审中-公开
    Kanalidentifizierungszuweisungsverfahren und mobile手机系统

    公开(公告)号：EP1773086A2

    公开(公告)日：2007-04-11

    申请号：EP06027077.4

    申请日：2000-09-29

    申请人： NTT DoCoMo, Inc.

    发明人： Iwamura, Mikio ,  Ishikawa, Yoshihiro

    IPC分类号： H04Q7/36

    CPC分类号： H04W48/16 ,  H04W8/005 ,  H04W16/24 ,  H04W28/16 ,  H04W36/08 ,  H04W48/08 ,  H04W72/00 ,  Y02D70/00

    摘要： In a mobile communications system, its power consumption and time required for a mobile station to carry out neighboring cell search are reduced, and the complicated process involved in system design and management is simplified. A method is proposed of searching for a neighboring cell by using grouped channel identifiers sent from the sectors to the mobile station in the mobile communications system that allows the mobile station communicating with a plurality of base stations to decide sectors the mobile station waits for or communicates with. It includes the step of assigning channel identifiers belonging to the same group to sectors of the same base station, and the step of sending from the base station to the visiting mobile station a notification of any one of the channel identifiers assigned to the sectors of one of neighboring base stations.

    摘要翻译： 在移动通信系统中，减少了移动台执行相邻小区搜索所需的功耗和时间，简化了系统设计和管理中涉及的复杂过程。 提出了一种通过使用移动通信系统中的从扇区发送到移动台的分组信道标识符来搜索相邻小区的方法，其允许移动台与多个基站通信来决定移动台等待或通信的扇区 用。 它包括将属于同一组的信道标识符分配给相同基站的扇区的步骤，以及从基站向访问移动台发送分配给一个扇区的信道标识符中的任何一个的通知的步骤 的邻近基站。

    CDMA reception apparatus and received signal power measuring apparatus in CDMA mobile communication system
    10.
    发明公开
    CDMA reception apparatus and received signal power measuring apparatus in CDMA mobile communication system 有权
    CDMA-Empfangsvorrichtung und Leistungsmessverfahren des empfangenen信号在einem mobilen CDMA-Kommunikationssystem

    公开(公告)号：EP1460777A2

    公开(公告)日：2004-09-22

    申请号：EP04076066.2

    申请日：2000-07-19

    申请人： NTT DoCoMo, Inc.

    发明人： Usuda, Masafumi ,  Ishikawa, Yoshihiro ,  Onoe, Seizo

    IPC分类号： H04B7/005

    CPC分类号： H04W52/228 ,  H04B17/318 ,  H04B17/391 ,  H04W52/225 ,  H04W52/243

    摘要： In a CDMA reception apparatus, averaging means (412) for averaging at least one of vector, amplitude and power of received signal of a plurality of transmit power control sections is provided. Further, propagation path variation estimation means (407) for estimating a propagation path variation of the present transmit power control section from respective transmit power control sections in the past to obtain a propagation path variation estimation value (408) and propagation path variation correction means (multiplier) for correcting by the propagation path variation estimation value (408) are further provided, wherein the averaging means (412) averages at least one of vector, amplitude and power of received signal of the plurality of transmit power control sections corrected by the propagation path variation correction means (multiplier). With this configuration, the measurement accuracy is improved by measuring received signal power using a plurality of slots including past slots, more accurate transmit power control is performed, thereby achieving improved communication quality, a reduced transmit power, and an increased capacity.

    摘要翻译： 在CDMA接收装置中，提供了用于平均多个发送功率控制部的接收信号的向量，幅度和功率中的至少一个的平均化部（412）。 此外，传播路径估计器（407）用于从过去的各个发射功率控制部分估计本发射功率控制部分的传播路径变化，以获得传播路径变化估计值（408）和传播路径变化校正装置（乘法器 ）进一步提供用于通过传播路径变化估计值（408）进行校正的平均装置（412），其中平均装置（412）对通过传播路径校正的多个发射功率控制部分的接收信号的矢量，幅度和功率中的至少一个进行平均 变化修正手段（乘数）。 利用这种配置，通过使用包括过去时隙的多个时隙测量接收信号功率来提高测量精度，执行更精确的发射功率控制，从而实现提高的通信质量，降低的发射功率和增加的容量。