公开(公告)号：BR0015247A

公开(公告)日：2002-12-31

申请号：BR0015247

申请日：2000-11-03

Applicant: QUALCOMM INC

Inventor： YU NICHOLAS K ,  EASTON KENNETH D ,  SANKURATRI RAGHU

IPC: H03L7/00 ,  H04B1/16 ,  H04B7/26 ,  H04M1/73 ,  H04W52/02 ,  H04Q7/00

公开(公告)号：WO0133870A3

公开(公告)日：2001-11-22

申请号：PCT/US0030387

申请日：2000-11-03

Applicant: QUALCOMM INC

Inventor： YU NICHOLAS K ,  EASTON KENNETH D ,  SANKURATRI RAGHU

IPC: H03L7/00 ,  H04B1/16 ,  H04B7/26 ,  H04M1/73 ,  H04W52/02 ,  H04Q7/32

CPC classification number: H04W52/0293 ,  H04W52/029 ,  Y02D70/00 ,  Y02D70/12 ,  Y02D70/122

Abstract: A technique is described for activating an active-mode high frequency clock (102) following a sleep period for use within a mobile station wherein selected components of the mobile station operate using a low power, low frequency sleep-mode clock (104) during the sleep period and the faster high frequency active-mode clock (102) during non-sleep periods. In one embodiment, the technique is implemented by a device having a wake-up estimation unit (108) for estimating a wake up time using the sleep-mode clock (104) and a frequency drift compensation unit for compensating for any error in the estimated wake up time caused by frequency drift in the sleep-mode clock (104). An off-set time compensation unit (112) is also provided for compensating for a lack of precision in the low frequency sleep-mode clock (104) resulting in a possible error in the estimated wake up time. The lack of precision can result in an initial timing off-set error at the beginning of the sleep period and a final timing off-set error at the end of the sleep period. Both the frequency drift compensation unit (110) and the off-set time compensation unit employ a high frequency transition-mode clock signal for use in calculating the time required to adjust the wake-up time. The transition-mode clock (106), which may have the same frequency as the active-mode clock (102), is employed only at the beginning and end of the sleep period and is deactivated throughout most of the sleep period to reduce power consumption.

Abstract translation: 描述了一种用于激活休眠期之后的活动模式高频时钟（102）的技术，用于在移动站期间使用的移动站的选定组件在期间使用低功率，低频睡眠模式时钟（104） 睡眠期间和非睡眠期间更快的高频主动模式时钟（102）。 在一个实施例中，该技术由具有用于使用睡眠模式时钟（104）估计唤醒时间的唤醒估计单元（108）的设备和用于补偿所估计的任何错误的频率漂移补偿单元来实现 由休眠模式时钟（104）中的频率漂移引起的唤醒时间。 还提供了一种偏置时间补偿单元（112），用于补偿低频睡眠模式时钟（104）中的精度不足，从而导致所估计的唤醒时间中的可能误差。 缺乏精度可能导致睡眠周期开始时的初始定时偏移误差和睡眠周期结束时的最终定时偏移误差。 频率漂移补偿单元（110）和偏移时间补偿单元均采用高频转换模式时钟信号，用于计算调节唤醒时间所需的时间。 可以仅在活动模式时钟（102）具有相同频率的转换模式时钟（106）仅在睡眠周期的开始和结束时使用，并且在整个睡眠周期的大部分期间被去激活以减少功耗 。