Context aware system with multiple power consumption modes

Patent metadata

Field	Value
Publication number	US-9622177-B2
Application number	US-201514820340-A
Country	US
Kind code	B2
Filing date	Aug 6, 2015
Priority date	Aug 6, 2015
Publication date	Apr 11, 2017
Grant date	Apr 11, 2017

Abstract

A context aware system, for use in a mobile device, includes a context change detector (CCD) coupled to a context classifier (CCL). The CCD is configured to receive sensor data and to detect a change in a current context state of the mobile device based on the received sensor data. The CCL is configured to transition from a low power consumption mode to a normal power consumption mode in response to the CCD detecting the change in the current context state. The CCL is further configured to determine a next context state of the mobile device while in the normal power consumption mode.

First claim

What is claimed is:

1. A context aware system for use in a mobile device, the context aware system comprising:
a context change detector (CCD) configured to receive sensor data from one or more sensors of the mobile device and to detect a change in a current context state of the mobile device based on the received sensor data without determining what a next context state of the mobile device will be, wherein the CCD is configured to detect the change in the current context state by:
processing the received sensor data to generate one or more features, wherein the one or more features includes at least one feature selected from the group consisting of a mean of the received sensor data, a variance of the received sensor data, or a standard deviation of the received sensor data, and
comparing the one or more features with one or more respective thresholds; and

a context classifier (CCL) coupled to the CCD, wherein the CCL is configured to transition from a low power consumption mode to a normal power consumption mode in response to the CCD detecting the change in the current context state, and wherein the CCL is further configured to determine the next context state of the mobile device while in the normal power consumption mode, wherein the CCL is configured to vary the one or more respective thresholds in response to the current context state of the mobile device.

2. The context aware system of claim 1 , wherein the CCL is configured to transition to the low power consumption mode after determining the next context state of the mobile device.

3. The context aware system of claim 1 , wherein the CCD is configured to receive an indication of the current context state from the CCL, and wherein the CCD is configured to detect the change in the current context state based on the current context state and based on the received sensor data.

4. The context aware system of claim 3 , wherein the mobile device includes a plurality of sensors for providing sensor data to the CCD, wherein, in response to the indication of the current context state that is received from the CCL, the CCD is configured to determine which of the plurality of sensors to monitor to detect the change in the current context state.

5. The context aware system of claim 1 , wherein the CCD is implemented as a first software module, processor, or logic, and wherein the CCL is implemented as second software module, processor, or logic that is separate and distinct from the first software module, processor, or logic.

6. The context aware system of claim 1 , wherein the CCD includes a change detection algorithm for detecting the change in the current context state of the mobile device and the CCL includes a classification algorithm for determining the next context state of the mobile device, and wherein the change detection algorithm operates at a higher frequency than that of the classification algorithm.

7. The context aware system of claim 1 , wherein the CCL is configured to receive buffered past sensor data from a buffer of the mobile device in response to the CCD detecting the change in the current context state, and wherein the CCL is further configured to determine the next context state of the mobile device in response to the buffered past sensor data.

8. The context aware system of claim 1 , wherein the CCL is configured to initiate a sampling of new sensor data in response to the CCD detecting the change in the current context state, and wherein the CCL is further configured to determine the next context state of the mobile device in response to the new sensor data.

9. A context aware system for use in a mobile device, the context aware system comprising:
a context change detector (CCD) configured to receive sensor data from one or more sensors of the mobile device and to detect a change in a current context state of the mobile device based on the received sensor data without determining what a next context state of the mobile device will be, wherein the CCD is configured to detect the change in the current context state by:
processing the received sensor data to generate one or more features;
performing a statistical function on at least one of the one or more features to generate a statistical value; and
comparing the statistical value with a threshold; and

a context classifier (CCL) coupled to the CCD, wherein the CCL is configured to transition from a low power consumption mode to a normal power consumption mode in response to the CCD detecting the change in the current context state, and wherein the CCL is further configured to determine the next context state of the mobile device while in the normal power consumption mode, wherein the CCL is configured to vary the threshold in response to the current context state of the mobile device.

10. A method comprising:
receiving sensor data at a context change detector (CCD) of the context aware system included in a mobile device, wherein the sensor data is received from one or more sensors of the mobile device;
detecting, by the CCD, a change in the a current context state of the mobile device based on the received sensor data without determining what a next context state of the mobile device will be, wherein detecting the change in the current context state includes:
processing the received sensor data to generate one or more features; and
comparing the one or more features with one or more respective thresholds, wherein the one or more features includes at least one feature selected from the group consisting of a mean of the received sensor data, a variance of the received sensor data, or a standard deviation of the received sensor data;

varying the one or more respective thresholds in response to the current context state;
sending an indication of the change in the current context state to a context classifier (CCL) of the context aware system in response to the CCD detecting the change;
transitioning the CCL from a low power consumption mode to a normal power consumption mode in response to receiving the indication of the change in the current context state; and
determining, by the CCL, the next context state of the mobile device while in the normal power consumption mode.

11. The method of claim 10 , further comprising, transitioning the CCL to the low power consumption mode after determining the next context state of the mobile device.

12. The method of claim 10 , further comprising, receiving, at the CCD, an indication of the current context state from the CCL, wherein detecting, by the CCD, the change in the current context state includes detecting the change in the current context state based on the current context state and based on the received sensor data.

13. The method of claim 12 , wherein the mobile device includes a plurality of sensors for providing sensor data to the CCD, wherein the method further comprises determining, in response to the indication of the current context state, which of the plurality of sensors that the CCD is to monitor to detect the change in the current context state.

14. A method comprising:
receiving sensor data at a context change detector (CCD) of the context aware system included in a mobile device, wherein the sensor data is received from one or more sensors of the mobile device;
detecting, by the CCD, a change in the a current context state of the mobile device based on the received sensor data without determining what a next context state of the mobile device will be, wherein detecting the change in the current context state includes:
processing the received sensor data to generate one or more features;
performing a statistical function on at least one of the on

Assignees

• Qualcomm Inc

Inventors

• Jarosinski Tadeusz
• Sadasivam Shankar
• Carey Ryan Michael
• Lee Jinwon
• Dhingra Bhuwan
• Bisain Abhijeet
• Carvalho Vitor Rocha De
• Jain Rajeev
• Akula Muralidhar Reddy
• Swaminathan Ashwin

Classifications

• H04W52/0225 Primary

  using monitoring of external events, e.g. the presence of a signal · CPC title

• H04L43/16

  Threshold monitoring · CPC title

• H04M1/72454

  according to context-related or environment-related conditions · CPC title

• G06F1/3215 Primary

  Monitoring of peripheral devices · CPC title

• Y02D30/70

  in wireless communication networks · CPC title