利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

710 条记录 (耗时 0.036 秒)

    AMPLIFIER FOR RADIO TRANSMISSION
    2.
    发明授权
    AMPLIFIER FOR RADIO TRANSMISSION 有权
    放大器无线电发射

    公开(公告)号：EP0977354B1

    公开(公告)日：2010-11-24

    申请号：EP99905284.8

    申请日：1999-02-19

    申请人： NTT MOBILE COMMUNICATIONS NETWORK INC.

    发明人： KANEDA, Ryuusuke ,  HAGIWARA, Seiji ,  TAKAMI, Tadao

    IPC分类号： H03G3/20 ,  H04B1/04 ,  H03G3/30 ,  H03G1/00

    CPC分类号： H03G1/0088 ,  H03F1/02 ,  H03F1/0277 ,  H03F3/24 ,  H03F3/72 ,  H03F2200/516 ,  H03F2203/7239 ,  H03G3/3036 ,  H04B2001/045

    摘要： A radio transmission amplification apparatus includes input and output terminals between which are connected a gain control amplifier (11), a preamplifier (12) coupled with the output from the gain control amplifier, and a final amplifier (13) coupled with the output from the preamplifier. The range of the transmission output level of the amplification apparatus is divided into low, medium and high regions. For the low level region, power switches (28 and 29) cut off power supply to the preamplifier and the final amplifier while the output of the gain control amplifier (11) is connected to the terminal (14) through switches (15, 18 and 19). For the medium level region, the power switch (28) is ON with the power switch (29) OFF, and the switch (15) is connected with the preamplifier while the preamplifier output is connected to the terminal (14) through the switches (21 and 19). For the high level region, the power switches (28 and 29) are ON, the switches (15 and 16) are connected with the preamplifier and final amplifier, respectively, while the output of the final amplifier is connected to the terminal (14) through the switch (19).

    FRAME TRANSMITTER-RECEIVER
    9.
    发明授权
    FRAME TRANSMITTER-RECEIVER 失效
    接收器帧模式

    公开(公告)号：EP0896442B1

    公开(公告)日：2007-10-31

    申请号：EP97950400.8

    申请日：1997-12-25

    申请人： NTT MOBILE COMMUNICATIONS NETWORK INC.

    发明人： OHTANI, Tomoyuki ,  TAMURA, Motoshi ,  SATOH, Takaaki ,  MORIKAWA, Hiroki ,  ISHINO, Fumiaki

    IPC分类号： H04B7/26 ,  H04Q7/38

    CPC分类号： H04W36/18 ,  H04B7/022 ,  H04B7/2681 ,  H04W36/12 ,  H04W56/00

    摘要： A mobile radio communication system including at least one exchange, a network including a plurality of base stations, and a mobile station communicating simultaneously with the plurality of base stations, in which the transmission delay between the local station and the base stations varies in response to a plurality of service types that can be provided to the mobile station. It is the objective of the technique that communication with an appropriate transmission delay in response to the service type is to be enabled, and synchronization is to be recovered even when pull out occurs. Therefore, a storage member (processor (32) in local station) for storing the transmission delay for each service type in response to the plurality of service types that can be provided to the mobile station is provided. In addition, a setting member (diversity hand-over trunk (34) for setting the communication timing at each of the base stations on the basis of the transmission delay corresponding to the service type applied to the mobile station is provided.

    Method and system for mobile communications
    10.
    发明公开
    Method and system for mobile communications 失效
    移动通信的方法和系统

    公开(公告)号：EP1843483A2

    公开(公告)日：2007-10-10

    申请号：EP07014599.0

    申请日：1998-04-24

    申请人： NTT MOBILE COMMUNICATIONS NETWORK INC.

    发明人： Tamura, Motoshi ,  Miki, Motsumaru ,  Okamoto, Akiko ,  Kusunose, Kenya ,  Uchikoshi, Akihiro ,  Igarashi, Daisuke ,  Yamagata, Katsuhiko ,  Sato, Takaaki ,  Hagiwara, Junichiro ,  Watanabe, Yasuyuki ,  Hamajima, Takuya ,  Hata, Masafumi ,  Ishikawa, Nobutaka ,  Yasuda, Yoshiyuki ,  Yunoki, Kazufumi ,  Uchiyama, Nobuhide

    IPC分类号： H04B7/005 ,  H04Q7/38

    CPC分类号： H04B7/022 ,  H04W12/02 ,  H04W12/06 ,  H04W36/08 ,  H04W36/18 ,  H04W52/04 ,  H04W52/12 ,  H04W80/04 ,  H04W84/042 ,  H04W88/06 ,  H04W88/12

    摘要： The present invention relates to a method for determining a radio zone and an uplink transmission power, wherein each of base stations transmits broadcast information indicating a perch channel transmission power level and an uplink interference level via a corresponding perch channel, and a mobile station receives the broadcast information from near base stations around the mobile station, detects respective reception levels of the perch channels for the near base stations, calculates respective path losses between the mobile station and respective near base stations on the basis of the respective reception levels and the respective perch channel transmission power levels within the broadcast information, calculates respective uplink transmission power levels between the mobile station and respective near base stations on the basis of the calculated respective path losses, the respective uplink interference levels within the broadcast information, and required signal-to-interference ratios involved in reception by the near base stations, selects a radio zone in which the necessary uplink transmission power level is minimum among the respective necessary uplink transmission power levels, the base station of the selected radio zone being ready for communication with the mobile station or being able to commence communication with the mobile station after handover, and controls an uplink transmission power in the selected radio zone based on the necessary uplink transmission power level of the selected radio zone.

    摘要翻译： 本发明涉及一种用于确定无线电区域和上行链路传输功率的方法，其中每个基站经由相应的导频信道传输指示导频信道传输功率电平和上行链路干扰电平的广播信息，并且移动站接收 来自移动台周围的近基站的广播信息，检测近端基站的导频信道的各个接收电平，基于各个接收电平和相应的鲈鱼计算移动台和各个近端基站之间的相应路径损耗 根据计算出的各个路径损耗，广播信息内的各个上行干扰电平和所需的信噪比来计算移动台和各个近端基站之间的各个上行链路发射功率电平， 干扰r 涉及近端基站的接收的天线，选择其中必需的上行链路发射功率电平在各个必需的上行链路发射功率电平中最小的无线电区域，所选择的无线电区域的基站准备好与移动台通信或者 能够在切换之后开始与移动台的通信，并且基于所选无线电区域的必要上行链路传输功率电平来控制所选无线电区域中的上行链路传输功率。