Qing X Li

US Patent:

8595520, Nov 26, 2013

Filed:

Nov 21, 2011

Appl. No.:

13/301431

Inventors:

Qing Li - Boulder CO, US
Jon J. Anderson - Boulder CO, US
James M. Artmeier - Boulder CO, US
Jeffrey A. Niemann - Boulder CO, US
Sumit Sur - Boulder CO, US

Assignee:

QUALCOMM Incorporated - San Diego CA

International Classification:

G06F 1/00
G06F 1/26
G06F 1/32

US Classification:

713300, 713320

Abstract:

Various embodiments of methods and systems for determining the thermal status of processing components within a portable computing device (“PCD”) by measuring leakage current on power rails associated with the components are disclosed. One such method involves measuring current on a power rail after a processing component has entered a “wait for interrupt” mode. Advantageously, because a processing component may “power down” in such a mode, any current remaining on the power rail associated with the processing component may be attributable to leakage current. Based on the measured leakage current, a thermal status of the processing component may be determined and thermal management policies consistent with the thermal status of the processing component implemented. Notably, it is an advantage of embodiments that the thermal status of a processing component within a PCD may be established without the need to leverage temperature sensors.

US Patent:

8650423, Feb 11, 2014

Filed:

Nov 21, 2011

Appl. No.:

13/301480

Inventors:

Qing Li - Boulder CO, US
Sumit Sur - Boulder CO, US
Jeffrey A. Niemann - Boulder CO, US
James M. Artmeier - Boulder CO, US

Assignee:

QUALCOMM Incorporated - San Diego CA

International Classification:

G06F 1/00
G06F 1/26
G06F 1/32

US Classification:

713322, 713300, 713320

Abstract:

The aspects enable a computing device or microprocessor to scale the frequency and/or voltage of a processor to an optimal value balancing performance and power savings in view of a current processor workload. Busy and/or idle duration statistics are calculated from the processor during execution. The statistics may include a running average busy and/or idle duration or idle/busy ratio, a variance of the running average and a trend of the running average. Current busy or idle durations or an idle-to-busy ratio may be computed based on collected statistics. The current idle-to-busy ratio may be compared to a target idle-to-busy ratio and the frequency/voltage of the processor may be adjusted based on the results of the comparison to drive the current running average toward the target value. The target value of idle-to-busy ratio may be adjusted based on the calculated variance and/or trend values.

US Patent:

20090282159, Nov 12, 2009

Filed:

Apr 9, 2009

Appl. No.:

12/420965

Inventors:

Qing Li - Broomfield CO, US
Ron Munoz - Arvada CO, US

Assignee:

Level 3 Communications, LLC - Broomfield CO

International Classification:

G06F 15/16

US Classification:

709231

Abstract:

An embodiment of a method includes receiving a request for the content from a requester, retrieving the content from a media access server, and while retrieving the content from the media access server, simultaneously streaming the content to the requester. An embodiment of a system includes an edge server having a media streaming server configured to receive the request and stream the specified content to a requester from a local memory, and a stream caching server configured to retrieve the requested content from a media access server while the media streaming server is streaming at least a specified portion of the content, and wherein the stream caching server is further configured to store the retrieved content in a local cache and notify the media streaming server that content is stored in local cache.

US Patent:

20100325303, Dec 23, 2010

Filed:

Aug 24, 2010

Appl. No.:

12/862323

Inventors:

Qing Li - Broomfield CO, US
Ron Munoz - Arvada CO, US
Jeremy Spencer - Lafayette CO, US

International Classification:

G06F 15/16

US Classification:

709231

Abstract:

An embodiment of a method includes receiving a request for the content from a requester, retrieving the content from a media access server, and while retrieving the content from the media access server, simultaneously streaming the content to the requester. An embodiment of a system includes an edge server having a media streaming server configured to receive the request and stream the specified content to a requester from a local memory, and a stream caching server configured to retrieve the requested content from a media access server while the media streaming server is streaming at least a specified portion of the content, and wherein the stream caching server is further configured to store the retrieved content in a local cache and notify the media streaming server that content is stored in local cache.

US Patent:

20130097415, Apr 18, 2013

Filed:

Jan 12, 2012

Appl. No.:

13/349139

Inventors:

Qing Li - Boulder CO, US
Sumit Sur - Broomfield CO, US
Jeffrey A. Niemann - Superior CO, US
Bohuslav Rychlik - San Diego CA, US

Assignee:

QUALCOMM INCORPORATED - San Diego CA

International Classification:

G06F 9/06

US Classification:

713100

Abstract:

The aspects enable a computing device or microprocessor to adjust the operations of a processor in view of a current processor workload based on a histogram-like data structure. A histogram-like data structure characterizing one of processor busy and/or idle durations or busy/idle ratios is generated at runtime and used to model the processor workload. The processor workload is used to predict future processing requirements and to adjust the processor's operations such that they are commensurate with the processing and workload requirements. The histogram-like data structure may alternatively be used to estimate a current quality of service (QoS) of a communication link so that link management actions may be taken.

US Patent:

20130301218, Nov 14, 2013

Filed:

May 9, 2012

Appl. No.:

13/467297

Inventors:

Qing Li - Boulder CO, US
Jon J. Anderson - Boulder CO, US

Assignee:

QUALCOMM INCORPORATED - San Diego CA

International Classification:

H05K 7/20

US Classification:

361695

Abstract:

Methods, systems, and devices for providing cooling for a mobile device using piezoelectric active cooling devices. Some embodiments utilize piezoelectric actuators that oscillate a planar element within an air channel to fan air within or at an outlet of the air channel. The air channel may be defined by at least one heat dissipation surface in thermal contact with components of the mobile device that generate excess waste heat. For example, the air channel may include a surface that is in thermal contact with a processor of the mobile computing device. In embodiments, the piezoelectric active cooling device may be used in an air gap between stacked packages in a package on package (PoP) processor package. The described embodiments provide active cooling using low power, can be controlled to provide variable cooling, use highly reliable elements, and can be implemented at low cost.

US Patent:

20150229303, Aug 13, 2015

Filed:

Feb 7, 2014

Appl. No.:

14/175922

Inventors:

- San Diego CA, US
Qing Li - Boulder CO, US

Assignee:

QUALCOMM INCORPORATED - San Diego CA

International Classification:

H03K 17/14
H03K 3/012

Abstract:

Systems and methods for conditioning a power rail (e.g., reducing voltage droops and/or voltage overshoots on the power rail) are described herein. In one embodiment, a power circuit comprises a capacitor coupled to a high-voltage rail, and a droop slope limiter (DSL) coupled between the high-voltage rail and a power rail. The DSL is configured to detect a downward voltage slope on the power rail, and to control current flow from the high-voltage rail to the power rail through the DSL based on the detected downward voltage slope.

US Patent:

20140333281, Nov 13, 2014

Filed:

May 9, 2013

Appl. No.:

13/890731

Inventors:

- San Diego CA, US
Qing LI - Boulder CO, US

International Classification:

G01R 21/00
G05F 5/00

US Classification:

323318, 324 7611, 324654, 324601

Abstract:

A method and device are disclosed for estimating a power demand level of an active circuit on a power supply line. A ripple amplitude and a ripple frequency associated with operation of the active circuit may be monitored on the power supply line. The ripple amplitude and ripple frequency may be compared with corresponding references. The ripple amplitude and ripple frequency may be associated with an estimated power demand level of the active circuit on the power supply line based on the comparison. A ripple generator generates a controlled ripple on the power supply line for calibration.