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    • 4. 发明申请
    • FAST RANDOM ACCESS METHOD FOR EUDCH OF WCDMA
    • WCDMA的快速随机接入方法
    • WO2004100565A2
    • 2004-11-18
    • PCT/KR2004/001097
    • 2004-05-12
    • SAMSUNG ELECTRONICS CO. LTD.BEIJING SAMSUNG TELECOM R & D CENTERLEE, Ju-HoDU, GaokeLI, XiaoqiangYAN, GuixiaZHANG, Yujian
    • LEE, Ju-HoDU, GaokeLI, XiaoqiangYAN, GuixiaZHANG, Yujian
    • H04Q
    • H04W52/362H04W52/146H04W52/367H04W52/50
    • A fast random access method for the enhanced uplink dedicated channel of WCDMA system including: Network periodically set "EUDCH power offset" and "EUDCH power ramp step" and broadcast them to a UE via the system information block or transmit them via dedicated channel; and the UE calculates Preamble_Initial_power and preamble transmission power based on the received "EUDCH power offset" and "EUDCH power ramp step", respectively. By specially setting the transmission power offset for initial preamble and larger power ramp step, the initial transmission power of random access procedure is increased, and the probability of random access success is increased. Time needed for power probing is reduced, and the time needed for the random access is reduced. Values of the information elements newly added are set by the network according to the current uplink interference and the estimated possible number of the users for the fast random access.
    • 一种用于WCDMA系统的增强型上行链路专用信道的快速随机接入方法,包括:网络周期性设置“EUDCH功率偏移”和“EUDCH功率斜坡步长”,并通过系统信息块将其广播到UE,或通过专用信道进行发送; 并且UE分别基于接收的“EUDCH功率偏移”和“EUDCH功率斜坡步长”来计算Preamble_Initial_power和前导码发送功率。 通过专门设置初始前同步码和较大功率斜坡步长的发射功率偏移,随机接入过程的初始发射功率增加,随机接入成功概率增加。 降低功率检测所需的时间,减少随机存取所需的时间。 新添加的信息元素的值由网络根据当前上行链路干扰和用于快速随机接入的估计可能数量来设置。