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A low-power sensor polling method for smartphone context-aware services

A technology of low-power sensors and polling methods, applied in data processing power supplies, program control devices, etc., can solve problems that affect user experience, loss, and shorten battery life of smartphones

Inactive Publication Date: 2017-02-15
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this exhaustive probing approach, a large amount of energy is wasted in inefficient sensor activity, which greatly reduces the battery life of the smartphone and seriously affects the user experience

Method used

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  • A low-power sensor polling method for smartphone context-aware services
  • A low-power sensor polling method for smartphone context-aware services
  • A low-power sensor polling method for smartphone context-aware services

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0026] 1) Platform and implementation.

[0027]The platform is based on the Sumsang Galaxy Nexus8 running Android 4.3. In the experiment, 14 sensors on the smart phone were selected. As shown in Table 1, the power consumption per second is represented by power per Hz. Set the sensor to 5 general states: OFF, SLOWEST, NORMAL, GAME and FASTEST. Lower sampling frequency corresponds to longer sleep states and less power consumption. Table 1 also lists the associated properties of these sensors.

[0028] Table 2 represents the full name of each attribute and the relevant application program. The present invention has designed two programs: activity and enviroment are used to test the model, and activity is used to detect user status; enviroment is used to detect the environment value activity program needs to request Attributes include: IsWalking(IW), IsDriving(ID), IsJogging(IJ), IsSitting(IS), IsDownstairs(IDS) and IsUpstairs(IUS). The attributes that the environment program n...

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Abstract

The invention provides a polling method of a low-power consumption sensor used for a context-aware application program on the basis of context-aware service of the sensor in a smartphone. By using the method, unnecessary sensor activities can be dynamically removed, so that the sensors can be kept in a sleep state for a long time. Additionally, the invention also provides a method for searching the relation between an application request and the sensor activities. By adopting the method, multiple application program combination detecting frequencies which are invoked by a user are calculated and matched by a polling scheduler, so as to lead low-power consumption polling to avoid unnecessary activities. When different context application programs are used for evaluating the method, results indicate that the low-power consumption polling response time in a middleware is minimum (97ms). Compared with that of the traditional exhaustive polling operation, the energy consumption can be saved by about 70%. Through the context-aware service, the energy consumption of the sensor of the smartphone can be reduced, and the service life of a battery of the smartphone is prolonged.

Description

[0001] Technical field [0002] The invention relates to the field of energy consumption of smart phone sensors, in particular to a low-power sensor polling method for smart phone context awareness services. Background technique [0003] Currently, new applications on smartphones can adapt themselves to user context, requiring a platform for collecting, distributing, and exchanging contextual information. By estimating user contextual features such as user location, activities, physiological characteristics, scheduling, and surrounding contextual information, mobile devices can be proactively configured according to the user's current state. Google continuously detects device location information through WIFI or GPS, so as to send predefined messages to users when they are in a designated area. This context-aware program on smartphones infers user context information by acquiring data from smartphone sensors such as GPS, accelerometer, and microphone. However, most sensors co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F9/44G06F1/32
Inventor 郭兵沈艳王继禾陈辉李德光李俊科杨奔盛志远张放
Owner SICHUAN UNIV
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