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    • 1. 发明专利
    • Terminal apparatus of cellular radio system and transmission power control method at base station
    • 蜂窝无线电系统的终端设备和基站的传输功率控制方法
    • JP2005102284A
    • 2005-04-14
    • JP2004324146
    • 2004-11-08
    • Nokia Mobile Phones Ltdノキア モービル フォーンズ リミティド
    • HONKASALO ZHICHUNHAEMAELAEINEN JARIJOKINEN HARRIRICHARD FEHLMANN
    • H04B1/04H04B7/005H04B7/26H04J3/00H04W52/00H04W52/02H04W52/06H04W52/20H04W52/22H04W52/50
    • H04W52/06H04W52/146H04W52/20H04W52/225H04W52/228H04W52/50
    • PROBLEM TO BE SOLVED: To control transmission power in a cellular radio system by a little signal quantity taking the special necessity of a packet-switching link into consideration. SOLUTION: A terminal apparatus measures (30, 31) a control signal from a base station before the establishment of connection and during a long rest between packets and compares its signal power (R0) with an objective level which the base station holds. The base station notifies the transmission power by the control signal, too, and the terminal apparatus regards the same power as the transmission power by correcting only a difference (t0-R0) between the objective level and quality for a link to be measured (32). The quality (RXQUAL) for the link to be measured is transmitted as an acknowledgement message and the transmission power is changed so as that the quality reaches a definite objective level at a transmission side. The maximum width of the change is decided by the length of the packet. The base station uses the maximum power at first in packet transfer to a down link direction and then corrects the transmission power based on measured information in an acknowledgement message transmitted from the terminal apparatus. COPYRIGHT: (C)2005,JPO&NCIPI
    • 要解决的问题:考虑到分组交换链路的特殊需要,通过少量信号量来控制蜂窝无线电系统中的发送功率。 解决方案:终端设备在建立连接之前和在分组之间的长时间休息期间测量(30,31)来自基站的控制信号,并将其信号功率(R0)与基站所持有的目标水平进行比较 。 基站也通过控制信号通知发送功率,终端装置仅通过仅校正待测链路的目标电平和质量之间的差(t0-R0)来解决与发送功率相同的功率(32 )。 将要测量的链路的质量(RXQUAL)作为确认消息进行发送,并且改变发送功率,使得质量在发送侧达到确定的目标水平。 更改的最大宽度由数据包的长度决定。 基站首先在下行链路方向的分组传输中使用最大功率,然后基于从终端装置发送的确认消息中的测量信息来校正发送功率。 版权所有(C)2005,JPO&NCIPI