KR20120129257A - Battery management apparatus on mobile system and method thereof - Google Patents

Abstract

In the present invention, in the battery management in the mobile system, in the general-purpose mobile system using a battery such as a mobile phone, smart phone, and manages the important application and usage guarantee time information set by the user, and the energy resource allocation information and actual for each application Accurately calculate the energy resource usage information, and selectively limit the energy usage of the less important applications based on the battery status information of the mobile system and the energy resource usage information for each application, thereby reducing the usage time of the more important applications. Ensure it is guaranteed.

Description

BATTERY MANAGEMENT APPARATUS ON MOBILE SYSTEM AND METHOD THEREOF}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery management method in a mobile system, and in particular, set by a user in a general-purpose mobile system using a battery such as a mobile phone or a smart phone. Manage important application and usage guarantee time information, calculate energy resource allocation information and actual energy resource usage information for each application accurately, and then use battery status information and energy resource usage information for each application. The present invention relates to a battery management apparatus and method of a mobile system that can ensure the use time of high priority applications by selectively limiting the energy usage of low priority applications in a battery limit situation.

In recent years, the use of a mobile system operated by being powered by a battery such as a mobile phone or a smart phone is increasing rapidly. These mobile systems are typically installed in homes or offices, and unlike desktop PCs powered by fixedly connected cables, the amount of battery resources is limited. There is a need for structures that can conserve and properly limit energy for applications.

This requires one integrated metric rather than process or resource management of existing operating systems, and various existing studies integrate energy resources consumed by multiple devices in an operating system. A lot of progress is being made towards managing resources.

For example, if you want to ensure a five-hour web browser to check stock trends and at the same time request to listen to music for three hours, In addition to the current battery status, integrated energy metrics are needed for system resources such as battery resources for each application. In order to meet these demands, it is necessary to manage the energy consumed by multiple devices in one operating system as one integrated resource, and various researches on this have been conducted.

However, existing studies have focused on controlling power usage by using power usage modeling or application adaptation to ensure usage time of mobile systems. The focus is on the measurement. However, in actual mobile systems, many mobile applications are downloaded directly from the app store or market as executable files, so the method through the adaptation of the program is not practical.

In addition, the existing studies have a problem of modifying the application in order to ensure the adaptation of the application according to the battery state as described above, and does not guarantee the battery life time (particular application unit), but from the system perspective It only guarantees battery life, and there is no evaluation and analysis to guarantee battery life for each application. Accordingly, there is a problem in that it is not possible to provide a use time guarantee for an application preferred by the user.

In other words, users need a structure that can control energy usage by using a simple interface for each desired application rather than guaranteeing the actual use time of the battery itself. No analysis is being done.

Accordingly, the present invention manages important applications and usage guarantee time information set by a user in a general-purpose mobile system using a battery such as a mobile phone or a smart phone, and accurately stores application-specific energy resource allocation information and actual energy resource usage information. After the calculation, based on the battery status information of the mobile system and the energy resource usage information of each application, the mobile device can be used to guarantee the use time of the high priority applications by selectively limiting the energy usage of the less important applications in the case of a battery limit situation. An apparatus and method for battery management of a system is provided.

According to the present invention, in the battery management apparatus of the mobile system, the battery management unit for managing the importance information and usage guarantee time information for each application, and calculates the energy resource usage by the application, determine the battery status by checking the remaining battery capacity And a battery scheduler configured to selectively limit the execution of the application according to the battery state.

The battery state service unit may calculate an amount of energy resource used to secure a usage guarantee time of an application in which the importance information is set, and determine the battery state by comparing it with the remaining capacity of the battery.

The battery state service unit may manage information on energy resource usage for each application as a task ID of a mobile system.

The battery state service unit may be configured to include the actual display usage of the application when calculating the energy resource usage for each application.

The battery state service unit may measure actual display usage of each application using a framework of the application.

In addition, the battery scheduler, if the battery state is a state that requires the use of the battery, characterized in that for selectively limiting the execution of the application of the importance is not set by checking the importance information of the application.

In addition, when the battery state is a state in which the battery usage limit is required, the battery scheduler may check the importance information of the application and execute the execution of the allocated energy resource usage for the application of the importance setting.

In addition, when the battery state is a state in which the battery usage is required, the battery scheduler switches the sleep state from the execution queue to the corresponding application among the applications included in the application execution queue in which the importance is not set. It is characterized by controlling not to be executed.

In addition, the present invention provides a battery management method of a mobile system, comprising the steps of setting the importance information and usage time information for each application executed in the mobile system, the step of calculating the energy resource usage for each application, the energy resource usage and Comparing the remaining battery capacity of the mobile system to determine a battery state, and selectively limiting execution of the application according to the battery state.

In the energy resource usage calculation step, the energy resource usage of the application in which the importance information is set may be calculated as an energy resource usage that can secure a usage guarantee time allocated to the application.

The energy resource usage may be managed by a task ID on the mobile system.

The energy resource usage may be calculated to include the actual display usage for each application in the energy resource usage for each application.

In addition, the actual display usage for each application is characterized by using the framework of the application.

In addition, the step of selectively limiting the execution of the application may include determining whether the state of the battery is a state in which battery usage is required, and checking whether or not the importance of each application is set when the state of the battery is in need of restriction. And selectively limiting execution of an application for which the importance of the check result is not set.

In addition, as a result of the inspection, the application of the importance is characterized in that it further comprises the step of executing until the consumption of the allocated energy resource consumption.

In addition, the step of selectively limiting the execution of the application may include determining whether the state of the battery is a state in which battery usage is required, and checking whether or not the importance of each application is set when the state of the battery is in need of restriction. And identifying applications included in the execution queues of the applications whose importance is not set, and putting the applications included in the execution queue into a sleep state.

In the present invention, in the battery management in the mobile system, in the general-purpose mobile system using a battery such as a mobile phone, smart phone, and manages the important application and usage guarantee time information set by the user, and the energy resource allocation information and actual for each application Accurately calculate the energy resource usage information, and selectively limit the energy usage of the less important applications based on the battery status information of the mobile system and the energy resource usage information for each application, thereby reducing the usage time of the more important applications. There is an advantage that can be guaranteed.

In addition, the present invention has the advantage that can be used to ensure the use time of applications requiring high reliability in mobile phones or tablet PCs by accurately redistributing the battery resources so that the battery can be used for a specific time for a critical application . In addition, the use time guarantee function is applicable to all battery-powered systems such as military equipment and sensor network systems, and simply develops a system with the same power consumption pattern until the battery is fully used, without further user intervention. By adjusting the resource allocation for each function in the case of battery limit, there is an advantage to guarantee the specified usage time by the system itself.

In addition, by presenting a method for calculating the power usage rate by application to guarantee the usage time, it is possible to adjust the power usage of the entire system as desired by the user, and to evaluate whether the application optimizes the power usage to select a better application. There is an advantage to being able to set standards.

1 is a configuration diagram of a battery management device of a mobile system according to an embodiment of the present invention;
2 is a conceptual diagram of a battery state of a mobile system according to an embodiment of the present invention;
3 is a conceptual view of a display operation of a mobile system;
4 is an operation control flowchart for battery management of a mobile system according to an embodiment of the present invention;
5 is a conceptual diagram of limiting the execution of the application in accordance with the battery state changes in the mobile system according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings will be described in detail the operating principle of the present invention. In the following description of the present invention, if it is determined that a detailed description of a known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted. The following terms are defined in consideration of the functions of the present invention, and may be changed according to the intentions or customs of the user, the operator, and the like. Therefore, the definition should be based on the contents throughout this specification.

1 illustrates a detailed block diagram of a battery management apparatus of a mobile system according to an exemplary embodiment of the present invention. Hereinafter, an operation of each component of the battery management apparatus will be described in detail with reference to FIG. 1.

First, the battery manager 100 sets an importance level for each application according to a request from a user, sets a usage guarantee time of an application for which an importance is set, and sets importance information and usage time information set for each application. Manage.

Battery status service unit (battery statics service) 102 calculates energy resource usage statistics information such as battery usage per application in the mobile system, and checks the remaining capacity of the battery to determine the current state of the battery among the preset battery status Inform the system. At this time, the battery of the mobile system is defined as a battery state of a plurality of stages according to the remaining capacity of the battery.

In this case, as shown in FIG. 2, for example, as shown in FIG. 2, for example, a normal state in which a battery remaining capacity does not need to be used, and a battery usage time is guaranteed without using a battery, and all applications are guaranteed. The first state (green) is available, the battery use is not limited, but the second state (yellow) is not possible to guarantee the battery life without the battery usage limit, and the battery use is limited, the battery management service performed It may be classified into a third state (red) which should be redundancy and a fourth state (black) which cannot guarantee the battery usage time even when the battery usage is limited.

Hereinafter, the operation of the battery state service unit 102 will be described in more detail. The battery state service unit 102 calculates a battery usage to be used for each application to predict the battery usage to be consumed by the application. At this time, for example, when the mobile system is an Android system, the energy resource usage and use time of each application are controlled using a battery management service based on information of a power manager and an activity manager provided by the Android system service. Can be profiled.

In this case, the battery state service unit 102 may profile the battery usage for each application as shown in Equation 1 below.

In Equation 1, old is information on past battery usage consumed by the application, and this sample means current estimated battery usage information to be consumed by the application. In predicting the battery usage of an application, profiling the battery usage using only the latest information may lead to an incorrect result due to the sudden high load of the application, and also the nonlinearity of the battery ( Because of the non-linear nature, even the same task can cause differences in battery usage.

Accordingly, the present invention changes the sampling length for each state of the battery. At this time, each sampling time is determined according to the battery consumption time and the threshold for switching the battery state. For example, if the state of the battery is in the first state, it is likely to provide guaranteed runtime of relatively important tasks, so set a relatively long time interval to determine the remaining capacity of the battery. In case of the second state, a short time interval is set so as not to miss the entry into the third state requiring the use of the battery. That is, for example, in the first state, the remaining capacity of the battery is set to be checked every time 1% of the battery decreases, and in the second state, the remaining capacity of the battery is checked by sampling every 20 seconds or 30 seconds. Can be set to

In addition, in the present invention, in order to accurately measure energy resource usage such as battery consumption consumed by one application, the battery state service unit 102 may apply, for example, the allocation and accounting of the energy resource. If the mobile system is Android, it can be managed by UID which is a package unit of Android.

The battery state service unit 102 may first set a time based on a result of profiling energy resource usage for an application of which importance is set by the user when the state of the battery enters the second state in the energy resource allocation. Only the energy resources allocated to each UID are scheduled during the interval. In this case, the battery state service unit 102 reassigns energy resources to other applications of which importance is set when a predetermined time interval ends by using a kernel thread. In addition, if the allocated energy resources are not used up or overcharged during the corresponding time interval, the corresponding energy usage is used or limited in the next scheduling interval.

Next, in calculating energy resource usage, the energy resource usage in each device of the mobile system is generally calculated based on information in the kernel, and the actual display of information unknown in the kernel. ) Is measured using the framework system of the mobile system.

However, in the battery state service unit 102 of the present invention, the power profiler and activity manager of the mobile system and the information provided by the battery device driver of the kernel are actually used. Energy usage is measured for each application.

For example, the CPU calculates the frequency and time, and calculates the power based on the CPU time used for each task and the frequency of the operation. In the case of a network, the data is calculated based on the amount of data exchanged using wifi and 3G for a certain period of time. In this case, the average cost consumed during the period can be obtained and energy consumption can be calculated by multiplying the amount of data exchanged for each UID.

In the case of a display, an accurate calculation is necessary because a large portion of energy resources are consumed in a mobile system such as a mobile phone or a smart phone. However, each application uses a display unit of a mobile system at a kernel level. In this case, it is difficult to know, and therefore it is difficult to calculate the energy resource usage used to drive the display unit for each application. Accordingly, the present invention solves the problem caused by the above-mentioned kernel by using the characteristics of the mobile system such as a smart phone and modifying the framework in the mobile system.

3 is a view illustrating a display operation concept of a conventional mobile system. Currently, most smartphones display only one active window at a time due to the limitation of a display unit size, and are in onPause 302 state in onResume 300. The application will use the actual display screen. Accordingly, the battery state service unit 102 of the present invention checks the operation state of the application and accurately displays the display usage by performing profiling on the energy usage of the application when the application is in the onPause 302 state in the onResume 300. Check it out. To this end, the battery state service unit 102 measures the actual display usage by checking the operation state of the onResume 300 to the onPause 302 of the application by modifying the application framework.

The battery scheduler 104 may secure a usage guarantee time of an application whose importance is set by the user based on the remaining capacity information of the battery and the energy resource usage information for each application identified by the battery status service unit 102. It performs scheduling for applications running on the mobile system.

That is, for example, when the remaining capacity of the battery becomes low and the battery state becomes the third state, temporarily stopping an application or process that is not set by the user, that is, the battery priority is low, Battery usage is scheduled so that system-wide power usage is suppressed to ensure usage time for applications of critical importance set by the user. In this case, the battery scheduler 104 distinguishes between a task or an application having an importance set and a task or an application whose importance is not set through communication between an application providing a user interface (UI) and a kernel. In addition, the battery state service unit 102 performs scheduling such as limiting execution of a task or an application whose importance is not set through communication with the kernel.

Hereinafter, the operation of the battery scheduler 104 will be described in more detail. The battery scheduler 104 performs scheduling in two ways according to the battery state provided from the battery state service unit 102.

First, when the battery is in a normal state, a first state, or a second state, the battery scheduler 104 may operate in a CF-scheduler manner, which is a basic scheduler of Linux, for example, when the mobile system is an Android system.

Next, when the state of the battery is a third state, the battery scheduler 104 operates in a battery-aware scheduler manner to ensure the usage time of an application whose importance is set by the user.

That is, when the battery scheduler 104 receives the state of the battery entering the third state from the battery state service unit 102, the battery scheduler 104 queues the application for which the importance is not set by the user. The scheduling of the application is performed to fall into the sleep state by the wait queue, and the application that is in the sleep state is not changed to the running state unless the battery is charged or the user request.

On the other hand, for an application whose importance is set by the user, the battery scheduler 104 executes the application until it consumes the energy resource usage allocated to the application, that is, the battery usage, and at least for the allocated energy resource usage. Runs at timer interrupt and process preemption to ensure that In addition, when the corresponding energy resource usage allocated to the application is used up, the mobile system is changed to an idle state because there is no process that can be performed anymore. In this case, the idle state of the mobile system may be regarded as a state of preserving energy resources for the execution of an application of which importance is set as the execution state of an application of which importance has not been set previously changed.

4 illustrates an operation control flow for battery management in a mobile system according to an embodiment of the present invention. Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS. 1 and 4.

First, a user sets importance for an application that is important for applications running in a mobile system. Then, the battery manager 100 recognizes an application for which the importance setting is requested by the user, sets the importance for the corresponding application (S400), and sets usage guarantee time information (S402).

As described above, information on whether the importance level is set for each application and usage guarantee time information set by the battery manager 100 are provided to the battery state service unit 102.

Then, the battery state service unit 102 calculates energy resource usage, that is, battery usage, to be used for each application in order to predict battery usage to be consumed by the application (S404). In this case, for example, when the mobile system is an Android system, the battery state service unit 102 uses a battery management service based on information of a power manager and an activity manager provided by the Android system service. You can profile energy resource usage and usage time by application.

Subsequently, the battery status service unit 102 checks the remaining battery capacity of the mobile system (S406) to determine the current battery status among the preset battery statuses, and provides the battery status information to the battery scheduler 104. .

Then, the battery scheduler 104 is mobile so that the guaranteed use time of the application of the importance set by the user based on the remaining capacity information of the battery and the energy resource usage information for each application identified by the battery status service unit 102 Performs scheduling for applications running on the system.

That is, when the battery state received from the battery state service unit 102 is the normal state, the first state (green), the second state (yellow) (S408), this is the usage time of the battery without limiting the use of the battery in the mobile system Since the guarantee is possible, the battery scheduler 104 sequentially executes all requested execution applications without performing scheduling for the requested application (S410).

However, when the battery state received from the battery state service unit 102 is the third state (red) (S412), since the battery capacity is insufficient because the remaining capacity of the battery is required, the battery scheduler 104 is To temporarily stop the application or process of low priority, that is, the battery usage priority is not set (S414), and to suppress the use of power throughout the system to ensure the use time for the application of the importance set by the user Schedule usage (S416).

That is, when the battery scheduler 104 receives the state of the battery entering the third state from the battery state service unit 102, the battery scheduler 104 queues the application for which the importance is not set by the user. The scheduling of the application is performed to fall into the sleep state by the wait queue, and the application that is in the sleep state is not changed to the running state unless the battery is charged or the user request.

On the other hand, for an application whose importance is set by the user, the battery scheduler 104 executes the application until it consumes the energy resource usage allocated to the application, ensuring a minimum exceeding the allocated energy resource usage. This is done during timer interrupts and process preemption.

Accordingly, even when the remaining capacity of the battery is insufficient to limit the use of the battery, it is possible to stably use time for the application of the importance set through accurate energy usage prediction for each application.

FIG. 5 illustrates a concept of limiting execution of an application according to a battery state change in a mobile system according to an exemplary embodiment of the present invention.

Referring to FIG. 5, when the state of the battery is a first state (green) in which all the applications can be executed, and the second state (yellow), other applications in which the importance is not set in addition to the application in which the importance is set are also included. All are ready to run. At this time, as the system application, as shown in FIG. 5, an application with a relatively high battery usage, such as a mail or a video player, may be executed without restriction.

Subsequently, when the state of the battery becomes a third state (red) in which the use of the battery is restricted, execution is restricted for other applications whose importance is not set according to the battery scheduling of the present invention. By enabling the execution of mails, video players, etc., the battery usage can be scheduled to ensure the usage time of the application whose importance is set.

Then, when the remaining capacity of the battery is less than the capacity of the third state to reach the fourth state (black), the battery usage of the basic system (alarm system), alarm application, etc. that can perform the basic operation of the mobile system Only very few of these applications are in a limited running state.

As described above, in the present invention, in the battery management in the mobile system, in the general-purpose mobile system using a battery such as a mobile phone, a smart phone, and manages important applications and usage guarantee time information set by the user, and energy for each application After accurately calculating resource allocation information and actual energy resource usage information, based on the battery status information of the mobile system and the energy resource usage information of each application, it is possible to selectively limit the energy usage of the less important applications in a battery limit situation. To ensure the use time of the application.

Meanwhile, in the above description of the present invention, specific embodiments have been described, but various modifications may be made without departing from the scope of the present invention. Accordingly, the scope of the invention should not be limited by the described embodiments but should be defined by the appended claims.

100: battery management unit 102: battery status service unit
104: Battery Scheduler

Claims (16)

Battery management unit for managing the application-specific importance information and warranty time information,
A battery state service unit for calculating an energy resource usage per application and determining a battery state by checking a remaining battery capacity;
Battery scheduler to selectively limit the execution of the application according to the battery state
Battery management device of the mobile system comprising a.
The method of claim 1,
The battery state service unit,
The battery management device of the mobile system, characterized in that for calculating the energy resource usage to ensure the guaranteed time of use of the application is set the importance information, and comparing it with the remaining capacity of the battery.
The method of claim 1,
The battery state service unit,
Battery management apparatus of the mobile system, characterized in that for managing information on the energy resource usage for each application by a task ID on the mobile system.
The method of claim 1,
The battery state service unit,
The battery management device of the mobile system, characterized in that the calculation to include the actual display usage of the application when calculating the energy resource usage for each application.
The method of claim 4, wherein
The battery state service unit,
The battery management apparatus of the mobile system, characterized in that for measuring the actual display usage by the application using the framework of the application.
The method of claim 1,
The battery scheduler,
The battery management device of the mobile system, characterized in that if the battery state is a state that requires the use of the battery, selectively check the importance information of the application to limit the execution of the application that is not set the importance.
The method according to claim 6,
The battery scheduler,
The battery management apparatus of the mobile system, characterized in that when the battery state is a state that requires the use of the battery, the criticality information of the application is inspected and executed until the consumption of the allocated energy resource for the application of the importance is set.
The method of claim 1,
The battery scheduler,
When the battery state is a state in which a battery usage limit is required, the application in the application execution queue of the application of which the importance is not set is switched to the sleep state from the execution queue to control the application not to be executed. Battery management apparatus of the mobile system characterized in that.
Setting importance information and warranty time information for each application running on the mobile system;
Calculating energy resource usage per application;
Determining a battery state by comparing the energy resource usage with the remaining battery capacity of the mobile system;
Selectively limiting execution of an application according to the battery state
Battery management method of the mobile system comprising a.
The method of claim 9,
In the energy resource usage calculation step,
The energy resource usage of the application in which the importance information is set is calculated as the energy resource usage to secure the usage guarantee time allocated to the application.
The method of claim 9,
The energy resource usage is,
Battery management method of a mobile system, characterized in that managed by the task ID on the mobile system. The method of claim 9,
The energy resource usage is,
The battery management method of the mobile system, characterized in that the calculated energy resource usage by the application is included to include the actual display usage by the application.
13. The method of claim 12,
Actual display usage by application,
Battery management method of a mobile system, characterized in that measured using the framework of the application.
The method of claim 9,
Selectively limiting the execution of the application,
Determining whether the state of the battery is in a state in which battery use restriction is necessary;
Checking whether the importance of each application is set when the battery usage limit is required;
Selectively restricting execution of an application whose importance is not set as a result of the inspection;
Battery management method of the mobile system comprising a.
15. The method of claim 14,
The method of the battery management method of the mobile system, characterized in that further comprising the step of executing until the consumption of the allocated energy resources for the application of the importance set.
The method of claim 9,
Selectively limiting the execution of the application,
Determining whether the state of the battery is in a state in which battery use restriction is necessary;
Checking whether the importance of each application is set when the battery usage limit is required;
Identifying an application included in an application execution queue of which the importance is not set;
Transitioning an application included in the execution queue to a sleep state
Battery management method of the mobile system comprising a.

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