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18 条记录 (耗时 0.015 秒)

    Multi-carrier CDMA and channel estimation
    12.
    发明公开
    Multi-carrier CDMA and channel estimation 审中-公开
    一种多载波CDMA信道估计和

    公开(公告)号：EP1128592A3

    公开(公告)日：2003-09-17

    申请号：EP01301065.7

    申请日：2001-02-07

    申请人： NTT DoCoMo, Inc.

    发明人： Abeta, Sadayuki ,  Atarashi, Hiroyuki ,  Sawahashi, Mamoru

    IPC分类号： H04L5/02 ,  H04L25/02 ,  H04L27/26

    CPC分类号： H04L25/0232 ,  H04L5/026

    摘要： A multi-carrier CDMA radio transmitting method replicates each information symbol and disposes thus-obtained information symbols along a frequency axis, multiplies the thus-obtained information symbols with a spreading code along the frequency axis, spreads the information symbols into components of a plurality of subcarriers having different frequencies. The transmission rate of the information is changed by controlling the amount of information transmitted simultaneously by controlling the number of the information symbols to be used for spreading for the plurality of sub-carrier components for each user to which the information is to be transmitted.

    Mobile communication system in multi-carrier CDMA scheme using short code and long code
    13.
    发明公开
    Mobile communication system in multi-carrier CDMA scheme using short code and long code 有权
    MehrträgerCDMA手机Kommunikationsanordnung mit kurzem und lagem Kode

    公开(公告)号：EP1204224A2

    公开(公告)日：2002-05-08

    申请号：EP01125484.4

    申请日：2001-11-06

    申请人： NTT DoCoMo, Inc.

    发明人： Hanada, Yukiko ,  Higuchi, Kenichi ,  Abeta, Sadayuki ,  Sawahashi, Mamoru

    IPC分类号： H04B7/26

    CPC分类号： H04B7/2628

    摘要： In the mobile communication system in the multicarrier CDMA scheme, data to be transmitted by the radio base station are doubly spread by using a long code that is unique to each radio base station and to be used in identifying each radio base station, in addition to a short code to be used in identifying each mobile station. The long code has a repetition period longer than or equal to the number of sub-carriers used for transmission.

    摘要翻译： 在多载波CDMA方案中的移动通信系统中，由无线基站发送的数据通过使用每个无线基站唯一的长码，并且用于识别各无线基站而被双重扩展，除了 用于识别每个移动台的短代码。 长码具有大于或等于用于传输的子载波的数量的重复周期。

    MOBILE STATION, RADIO ACCESS NETWORK DEVICE, AND RESOURCE REQUEST METHOD
    14.
    发明公开
    MOBILE STATION, RADIO ACCESS NETWORK DEVICE, AND RESOURCE REQUEST METHOD 审中-公开

    公开(公告)号：EP3592096A1

    公开(公告)日：2020-01-08

    申请号：EP19187296.9

    申请日：2007-02-06

    申请人： NTT DOCOMO, INC.

    发明人： Ishii, Minami ,  Abeta, Sadayuki ,  Nakamura, Takehiro

    IPC分类号： H04W74/08

    摘要： A mobile station includes an identifier selection unit selecting one identifier among identifiers supplied in advance when the mobile station initiates communications and a connection request signal generation unit generating a connection request signal including the identifier. A radio access network apparatus includes a response signal generation unit, in response to the connection request from the mobile station^ generating a response signal including an identifier assigned by a radio access network system and information indicative of an uplink radio resource assigned for the mobile station and a transmission unit transmitting the response signal to the mobile station transmitting the connection request.

    Communication system employing automatic repeat request
    16.
    发明公开
    Communication system employing automatic repeat request 审中-公开
    社区系统自动化Wiederholungsanforderung

    公开(公告)号：EP2093922A1

    公开(公告)日：2009-08-26

    申请号：EP09162415.5

    申请日：2001-06-14

    申请人： NTT DoCoMo, Inc.

    发明人： Miki, Nobuhiko ,  Atarashi, Hiroyuki ,  Abeta, Sadayuki ,  Sawahashi, Mamoru

    IPC分类号： H04L1/18 ,  H04L1/16

    CPC分类号： H04L1/06 ,  H04L1/0026 ,  H04L1/0034 ,  H04L1/1671 ,  H04L1/1816 ,  H04L1/1819 ,  H04L1/1845 ,  H04W52/54

    摘要： A communication method includes the steps of: a) transmitting an ACK signal indicating a received packet includes no error or a NACK signal indicating the received packet includes error from a reception end to a transmission end, and performing automatic repeat request; b) obtaining reliability of the received packet when demodulating it at the reception end; and c) reporting from the reception end to the transmission end the reliability of the received packet utilizing the ACK/NACK signal by using not less than three levels.

    摘要翻译： 一种通信方法包括以下步骤：a）发送指示接收到的分组的ACK信号，包括没有错误或指示所接收分组的NACK信号包括从接收端到发送端的错误，并执行自动重发请求; b）在接收端解调接收到的分组的可靠性; 以及c）通过使用不少于三个等级，使用ACK / NACK信号从接收端向发送端报告接收到的分组的可靠性。