公开(公告)号：US20160116598A1

公开(公告)日：2016-04-28

申请号：US14845781

申请日：2015-09-04

Applicant: QUALCOMM Incorporated

Inventor： Jie Wu ,  Dominic Farmer ,  Lalitaprasad Daita ,  Emilija Simic

IPC: G01S19/23 ,  G01S19/34

CPC classification number: G01S19/23 ,  G01S19/235 ,  G01S19/34 ,  G01S19/39

Abstract: Disclosed are devices, systems and techniques for propagating a system time maintained at a mobile device in a lower power mode using a sleep counter advanced by an XO crystal oscillator. In one particular implementation, a mobile device obtains initial and subsequent satellite positioning system fixes while in a higher power mode. Between the initial and subsequent position fixes, the mobile device may transition to a lower power mode during which measurements of a temperature of the XO crystal oscillator may be obtained.

Abstract translation: 公开了使用由XO晶体振荡器提前的睡眠计数器在较低功率模式下传播维持在移动设备上的系统时间的设备，系统和技术。 在一个特定实现中，移动设备在较高功率模式下获得初始和随后的卫星定位系统固定。 在初始和随后的位置定位之间，移动设备可以转换到较低功率模式，在此模式期间可以获得XO晶体振荡器的温度测量。

公开(公告)号：US10884134B2

公开(公告)日：2021-01-05

申请号：US16786360

申请日：2020-02-10

Applicant: QUALCOMM Incorporated

Inventor： Jie Wu ,  Dominic Gerard Farmer ,  Lalitaprasad Daita ,  Emilija Simic

IPC: G01S19/23 ,  G01S19/34 ,  G01S19/39

Abstract: Disclosed are devices, systems and techniques for propagating a system time maintained at a mobile device in a lower power mode using a sleep counter advanced by an XO crystal oscillator. In one particular implementation, a mobile device obtains initial and subsequent satellite positioning system fixes while in a higher power mode. Between the initial and subsequent position fixes, the mobile device may transition to a lower power mode during which measurements of a temperature of the XO crystal oscillator may be obtained.

公开(公告)号：US10557944B2

公开(公告)日：2020-02-11

申请号：US14845781

申请日：2015-09-04

Applicant: QUALCOMM Incorporated

Inventor： Jie Wu ,  Dominic Farmer ,  Lalitaprasad Daita ,  Emilija Simic

IPC: G01S19/23 ,  G01S19/34

Abstract: Disclosed are devices, systems and techniques for propagating a system time maintained at a mobile device in a lower power mode using a sleep counter advanced by an XO crystal oscillator. In one particular implementation, a mobile device obtains initial and subsequent satellite positioning system fixes while in a higher power mode. Between the initial and subsequent position fixes, the mobile device may transition to a lower power mode during which measurements of a temperature of the XO crystal oscillator may be obtained.

公开(公告)号：US09749962B1

公开(公告)日：2017-08-29

申请号：US15190177

申请日：2016-06-23

Applicant: QUALCOMM INCORPORATED

Inventor： Xu Chi ,  Michael Naone Farias ,  Lalitaprasad Daita

IPC: H04W52/02 ,  G06F1/32 ,  H04W88/06

CPC classification number: H04W52/0287 ,  G06F1/06 ,  G06F1/14 ,  G06F1/3206 ,  G06F1/324 ,  G06F1/3287 ,  G06F1/329 ,  H03B5/04 ,  H03B5/366 ,  H03L1/00 ,  H03L1/02 ,  H04W88/06 ,  Y02D10/171 ,  Y02D70/00

Abstract: Various embodiments of methods and systems for closed loop multimode sleep clock frequency compensation in a portable computing device are disclosed. An exemplary embodiment leverages a modem to determine a frequency shift on a sleep clock signal when a reference clock has transitioned into a power saving mode. Using the frequency shift calculation, a compensation capacitor may be adjusted to deliver a more optimum dummy load on the crystal oscillator when the reference clock is taken offline. The method may iterate through until the actual frequency shift of the sleep clock is within an acceptable tolerance relative to zero and, further, may also set a status bit to indicate that the sleep clock frequency is stable.

公开(公告)号：US20150103818A1

公开(公告)日：2015-04-16

申请号：US14264376

申请日：2014-04-29

Applicant: QUALCOMM Incorporated

Inventor： Steven John Kuhn ,  Lalitaprasad Daita ,  Samir Kapoor ,  Ravi Teja Mallajosyula

IPC: H04W56/00

CPC classification number: H04W56/0015 ,  H04J3/0658 ,  H04W56/00 ,  H04W56/002

Abstract: Synchronization of communication events according to a global time base (GTB). Devices implementing the GTB may be configured to awaken and exchange discovery and service capability information over pre-scheduled channels at time points determined according to the GTB. The GTB may be correlated to Global Positioning System (GPS) system time. A global time server (GTS) is described for providing a local source of accurate clock time relative to the GTB. The GTS may aggregate multiple sources of absolute and/or relative time including GPS and WWAN, select the most accurate source for a mobile environment, track source state transitions, and manage clock drift. Global time clients (GTCs) may receive updates from the GTS and compute offsets for communication events relative to a local clock. The GTC may correct for transport errors from transmission of the updated global time value across modules or sub-components of the devices.

Abstract translation: 根据全局时基（GTB）同步通信事件。 实现GTB的设备可以被配置为在根据GTB确定的时间点唤醒并交换在预先调度的信道上的发现和服务能力信息。 GTB可能与全球定位系统（GPS）系统时间相关。 描述了一种全球时间服务器（GTS），用于提供相对于GTB的准确时钟时间的本地源。 GTS可以聚合多个绝对和/或相对时间来源，包括GPS和WWAN，为移动环境选择最准确的源，跟踪源状态转换和管理时钟漂移。 全球时间客户端（GTC）可以从GTS接收更新，并计算相对于本地时钟的通信事件的偏移量。 GTC可以通过在设备的模块或子组件之间传输更新的全局时间值来纠正传输错误。

公开(公告)号：US20150103817A1

公开(公告)日：2015-04-16

申请号：US14264368

申请日：2014-04-29

Applicant: QUALCOMM Incorporated

Inventor： Steven John Kuhn ,  Lalitaprasad Daita ,  Samir Kapoor ,  Ravi Teja Mallajosyula

IPC: H04J3/06 ,  H04W56/00

CPC classification number: H04W56/0015 ,  H04J3/0658 ,  H04W56/00 ,  H04W56/002

Abstract: Synchronization of communication events according to a global time base (GTB). Devices implementing the GTB may be configured to awaken and exchange discovery and service capability information over pre-scheduled channels at time points determined according to the GTB. The GTB may be correlated to Global Positioning System (GPS) system time. A global time server (GTS) is described for providing a local source of accurate clock time relative to the GTB. The GTS may aggregate multiple sources of absolute and/or relative time including GPS and WWAN, select the most accurate source for a mobile environment, track source state transitions, and manage clock drift. Global time clients (GTCs) may receive updates from the GTS and compute offsets for communication events relative to a local clock. The GTC may correct for transport errors from transmission of the updated global time value across modules or sub-components of the devices.

Abstract translation: 根据全局时基（GTB）同步通信事件。 实现GTB的设备可以被配置为在根据GTB确定的时间点唤醒并交换在预先调度的信道上的发现和服务能力信息。 GTB可能与全球定位系统（GPS）系统时间相关。 描述了一种全球时间服务器（GTS），用于提供相对于GTB的准确时钟时间的本地源。 GTS可以聚合多个绝对和/或相对时间来源，包括GPS和WWAN，为移动环境选择最准确的源，跟踪源状态转换和管理时钟漂移。 全球时间客户端（GTC）可以从GTS接收更新，并计算相对于本地时钟的通信事件的偏移量。 GTC可以通过在设备的模块或子组件之间传输更新的全局时间值来纠正传输错误。