Patent Description:
Recently, with the rapid development of portable terminals, a mobile terminal providing wireless voice calls and data exchanges is regarded as personal necessity of life. Conventional portable terminals have generally been regarded as portable devices providing wireless calls. However, along with technical advances and introduction of the wireless Internet, portable terminals are now used for many purposes in addition to telephone calls. For example, the portable terminal provides a variety of functions to satisfy users' demands, such as, games, watching a satellite broadcasting program, remote controlling using near field communication, capturing images using a built-in digital camera, schedule management, and the like.

For the use of such a portable terminal, a longer time is required to use an additional function than a time of using wireless calls.

The development of batteries is not significant in comparison with the rapid development of the portable terminal. However, due to portability of the portable terminal, a required battery size is decreased, which results in the limitation of battery capacity.

In order to support more functions of the portable terminal with the limited battery capacity, power consumption of the portable terminal has to be reduced in addition to the increase of the battery capacity.

Among the functions of the portable terminal, battery consumption is great when listening to music, watching videos, operating a camera, emitting backlight, etc. Recently, portable terminals employ various sensors and functional modules for implementing a plurality of applications and functions. Accordingly, there is a problem in that power consumption is greater than a case of using the conventional terminals based on wireless communications.

In order to solve the aforementioned problem, the portable terminal intends to reduce power consumption by using the plurality of sensors included therein.

For example, the portable terminal uses the sensor to determine a time for using a Radio Frequency (RF) module so as to supply power at that time. Alternatively, the portable terminal escapes from an idle state at a time of determining a state in which the portable terminal will be used by a user such as an operation of gripping the portable terminal.

The portable terminal can reduce power consumption of the portable terminal. However, in order to determine a state of the portable terminal and a time for supplying power, the portable terminal has to obtain sensing information by periodically allowing a controller (i.e., an application processor) to wake up from an idle state.

That is, the aforementioned method has a problem in that power consumption occurs even in the idle state to perform a process of obtaining the sensing information to determine the state of the portable terminal and the time for supplying power.

<CIT> describes a device, system and method of power saving using location sensing modules. <CIT> and <CIT> describe a mobile communication device. <CIT> describes techniques to manage power based on motion detection.

An aspect of the present invention is to solve at least the above-mentioned problems and/or disadvantages and to provide at least the advantages described below. An aspect of the invention is to provide an electronic device as defined by claim <NUM> of the claims appended hereto. Another aspect of the invention is to provide a method of obtaining sensing information of an electronic device as defined by claim <NUM> of the claims appended hereto.

Throughout the drawings, like reference numerals will be understood to refer to like parts, components and structures.

Exemplary embodiments of the present invention will be described below with reference to the accompanying drawings. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

The present invention described below relates to an apparatus and method for reducing power consumption generated in an idle state in order to solve a power consumption problem in a portable terminal.

<FIG> is a block diagram illustrating a structure of a portable terminal for reducing power consumption according to an exemplary embodiment of the present invention.

Referring to <FIG>, the portable terminal includes a controller <NUM>, a sensor <NUM>, an application processor <NUM>, a state determination unit <NUM>, a memory <NUM>, an input unit <NUM>, a display unit <NUM>, and a communication unit <NUM>. An operation of the application processor <NUM> of the portable terminal may be processed by the controller <NUM>. The portable terminal may include additional units. Similarly, the functionality of two or more of the above units may be integrated into a single component.

The controller <NUM> of the portable terminal provides overall control to the portable terminal. For example, the controller <NUM> processes and controls voice calls and data communications, and in addition to its typical function, the controller <NUM> of the present invention provides control such that power consumption generated in an idle state is reduced to solve the power consumption problem of the portable terminal,.

More particularly, when the portable terminal remains in the idle state, the controller <NUM> controls the application processor <NUM> in an wake-up state to transition to a sleep state, and thereafter controls the state determination unit <NUM> to determine a state of the portable terminal. Accordingly, the state determination unit <NUM> in the idle state wakes up in order to control the sensor <NUM> and thus can determine the state of the portable terminal.

Further, according to another exemplary embodiment of the present invention, if the portable terminal remains in a state for entering a low-power mode such as an idle mode, the controller <NUM> provides control such that power consumption is reduced by ending an operation of functions except for a minimum function for call reception among operations being performed previously.

In addition thereto, according to another exemplary embodiment of the present invention, sensing information can be obtained under the control of the controller <NUM>. The sensing information is required to determine a state (or a life pattern of a user) of the portable terminal in a state in which the portable terminal enters the low-power mode. More particularly, the controller <NUM> controls the woken-up application processor <NUM> to analyze the life pattern of the user of the portable terminal by using the obtained sensing information (i.e., sensing information obtained by the control of the state determination unit <NUM>). Herein, examples of the life pattern of the user of the portable terminal include a commuting pattern indicating a route on which the user of the portable terminal frequently use to commute, a pattern of using public transportations, etc..

That is, under the control of the controller <NUM>, the application processor <NUM> transitions to the sleep state, and thereafter the state determination unit <NUM> stores sensing information having a great variable value. When the application processor <NUM> enters a wake-up state afterwards, the life pattern of the user of the portable terminal is determined by using the stored sensing information. Accordingly, by using the life pattern of the user of the portable terminal, the controller <NUM> can perform an operation of reporting a remaining time up to the arrival of a working place, and when the portable terminal is located near home, can perform operations corresponding to respective patterns such as garage door opening.

The sensor <NUM> consists of sensors (i.e., an acceleration sensor, a gyro sensor, a terrestrial magnetism sensor, a proximity sensor, an ambient light sensor, etc.). According to the present invention, the sensor <NUM> obtains sensing information by using the sensors under the control of the state determination unit <NUM>.

The application processor <NUM> is an element for processing an overall operation of the portable terminal similarly to the controller <NUM>. When the portable terminal remains in the idle state according to the present invention, the application processor <NUM> transitions to the sleep state, and when the state of the portable terminal is not in the idle state (i.e., when the portable terminal is in a standby state), the application processor <NUM> transitions to the wake-up state and controls an operation of the portable terminal. The operation of the application processor <NUM> can be processed by the controller <NUM>.

The state determination unit <NUM> controls the sensor <NUM> to obtain the sensing information for determining the state of the portable terminal, and determines the state of the portable terminal by using the sensing information obtained by the sensor <NUM>.

In this case, the state determination unit <NUM> wakes up at a time when the state of the portable terminal transitions to the idle state and thus allows the application processor <NUM> remaining in the wake-up state to the sleep state, and thereafter controls the sensor <NUM>. When it is determined that the portable terminal escapes from the idle mode by using the sensing information obtained by the sensor <NUM>, the state determination unit <NUM> turns off the operation of the sensor <NUM> to reduce power consumption, and thereafter allows the application processor <NUM> remaining in the sleep state to wake up.

Further, the state determination unit <NUM> is an element implemented separately from the application processor <NUM>, and can be constructed with a cheap micro computer and can determine the state of the portable terminal irrespective of the operation of the application processor <NUM>. According to another exemplary embodiment of the present invention, the state determination unit <NUM> includes an internal memory to store the sensing information required to determine the state of the portable terminal.

Accordingly, the state determination unit <NUM> can determine and store the sensing information that can be used to analyze the life pattern of the user of the portable terminal.

The memory <NUM> of the portable terminal includes a Read Only Memory (ROM), a Random Access Memory (RAM), a flash ROM, and the like. The ROM stores a microcode of a program, by which the controller <NUM>, the application processor <NUM>, and the state determination unit <NUM> are processed and controlled, and a variety of reference data.

The RAM is a working memory of the controller <NUM> and stores temporary data that is generated while programs are performed. The flash ROM stores a variety of rewritable data, such as phonebook entries, outgoing messages, incoming messages, and a variety of rewritable data such as information of the touch input point of the user.

The input unit <NUM> includes a plurality of function keys such as numeral key buttons of 'O' to '<NUM>', a menu button, a cancel button, an OK button, a talk button, an end button, an Internet access button, a navigation key button, and a character input key, and the like. Key input data, which is input when the user presses these keys, is provided to the controller <NUM>. These keys are merely examples of keys which may make up the input unit <NUM>; the input unit may include additional or different keys, or different input mechanisms through which the user supplies input to the portable terminal.

The display unit <NUM> displays information such as state information, which is generated while the portable terminal operates, limited numeric characters, large volumes of moving and still pictures, and the like. The display unit <NUM> may be a color Liquid Crystal Display (LCD), an Active Mode Organic light Emitting Diode (AMOLED), and the like. The display unit <NUM> may include a touch input device as an input device when using a touch input type portable terminal.

The communication unit <NUM> transmits and receives a Radio Frequency (RF) signal of data that is input and output through an antenna (not illustrated). For example, in a transmitting process, data to be transmitted is subject to a channel-coding process and a spreading process, and then the data is transformed to an RF signal. In a receiving process, the RF signal is received and transformed to a base-band signal, and the base band signal is subject to a de-spreading process and a channel-decoding process, thereby restoring the data.

Although the functions of the application processor <NUM> can be performed by the controller <NUM> of the portable terminal, these elements are separately constructed in the present invention for exemplary purposes only. For example, these elements may be constructed such that their functions are processed by the controller <NUM>.

An apparatus for reducing power consumption generated in an idle state in order to solve a power consumption problem in a portable terminal has been described above. Hereinafter, a method of reducing power consumption of the portable terminal by reducing power consumption generated in the idle state will be described by using the apparatus according to an exemplary embodiment of the present invention.

<FIG> is a flowchart illustrating a process of waking up from an idle state in order to reduce power consumption in a potable terminal according to an exemplary embodiment of the present invention.

Referring to <FIG>, the portable terminal determines whether a state of the portable terminal is a state for allowing the state determination unit <NUM> to wake up in step <NUM>. Herein, the state for allowing the state determination unit <NUM> to wake up implies a state in which the state of the controller <NUM> or the application processor <NUM> of the portable terminal transitions to a sleep state, which implies a case where the portable terminal transitions to an idle state so that the state determination unit <NUM> transitions from the sleep state to a wake-up state.

If it is determined in step <NUM> that the state of the portable terminal is the state for allowing the state determination unit <NUM> to wake up, proceeding to step <NUM>, the portable terminal allows the state determination unit <NUM> to wake up. Herein, the state determination unit <NUM> is an element for controlling an operation of a sensor included in the portable terminal, and can be constructed with a cheap micro computer independent from the controller <NUM> of the portable terminal so that the portable terminal can operate in the idle state.

Thereafter, the portable terminal operates the sensor <NUM> in step <NUM>, and obtains sensing information from the sensor <NUM> in step <NUM>. The sensor <NUM> may include a plurality of sensors, and can operate under the control of the state determination unit <NUM>.

In step <NUM>, the portable terminal performs a process of determining the state of the portable terminal by using the sensing information received from the sensor <NUM>. In this case, this process is performed to determine whether the portable terminal remains in the idle state or escapes from the idle state.

If the determination result of step <NUM> shows that the state of the portable terminal corresponds to a state of allowing the application processor <NUM> to wake up (i.e., in a state of being escaped from the idle mode), proceeding to step <NUM>, the portable terminal requests the wake up of the application processor <NUM>.

In step <NUM>, the portable terminal turns off the operation of the sensor being operated. In step <NUM>, the portable terminal changes the state determination unit <NUM> from the wake-up state to the sleep state.

This is to reduce power consumption generated when the application processor <NUM> wakes up periodically in the conventional portable terminal to determine the state of the portable terminal. According to the present invention, the portable terminal separately uses the state determination unit <NUM> such as a cheap micro computer which uses low power in the idle state, so as to obtain sensing information for determining the state of the portable terminal.

Otherwise, if the determination result of step <NUM> shows that the state of the portable terminal is not the state of waking up the application processor <NUM> (i.e., when it is determined that the portable terminal remains in the idle state), proceeding to step <NUM>, the portable terminal determines whether a period of the state determination unit <NUM> is a sleep period. Herein, the portable terminal allows the state determination unit <NUM> to periodically transition between the wake-up state and the sleep state with an interval of a specific period even in the idle state so as to reduce power consumption generated by the operation of the state determination unit <NUM>.

If it is determined in step <NUM> that the period of the state determination unit <NUM> is a wake-up period, step <NUM> is repeated.

Otherwise, if it is determined in step <NUM> that the period of the state determination unit <NUM> is the sleep period, proceeding to step <NUM>, the portable terminal turns off the operation of the sensor currently being operating.

This is to effectively avoid power consumption by allowing the state determination unit <NUM> to operate alternately between the wake-up state and the sleep state with a specific period, instead of allowing the state determination unit <NUM> to persistently operate in the idle state.

The aforementioned operation can be persistently performed while the portable terminal operates, so that the application processor <NUM> can wake up or sleep according to the state of the portable terminal.

Accordingly, if it is determine in step <NUM> that the state of the portable terminal is not in the state of allowing the state determination unit <NUM> to wake up, proceeding to step <NUM>, the portable terminal allows the application processor <NUM> to wake up, proceeding to step <NUM>, the portable terminal determines whether the portable terminal is powered on.

If it is determined in step <NUM> that the portable terminal is not powered on, returning to step <NUM>, the subsequent steps are repeated.

Otherwise, if it is determined in step <NUM> that the portable terminal is powered off, the procedure of <FIG> ends.

<FIG> illustrates a process of performing an operation for reducing power consumption in a portable terminal according to an exemplary embodiment of the present invention.

Referring to <FIG>, the portable terminal includes a state determination unit <NUM> in addition to an application processor <NUM> for determining a state of the portable terminal in order to reduce power consumption when performing a process of allowing the portable terminal to wake up in an idle state.

When in the idle state, the portable terminal allows only the state determination unit <NUM> to determine the state of the portable terminal.

More specifically, when the application processor <NUM> remains in a wake-up state <NUM>, the portable terminal switches a state of the state determination unit <NUM> to a sleep state <NUM>, and when the application processor <NUM> is switched to a sleep state <NUM> in a specific time (or period) <NUM>, the portable terminal switches the state of the state determination unit <NUM> in the sleep state <NUM> into a wake-up state <NUM> so that the state of the portable terminal is determined by using low power.

In this case, the state determination unit <NUM> switched to the wake-up state periodically transitions between the wake-up state and the sleep state while the application processor <NUM> remains in the sleep state <NUM>, so as to reduce power consumption generated by the operation of the state determination unit <NUM>. The state determination unit <NUM> in the wake-up state <NUM> obtains sensing information by allowing operations of sensors, and thereafter determines the state of the portable terminal.

On the contrary, when the state determination unit <NUM> in the wake-up state <NUM> transitions to the sleep state, power consumption of the portable terminal can be reduced by turning off operations of sensors currently being operating.

In addition thereto, the state determination unit <NUM> can allow the application processor <NUM> to transition to a wake up state <NUM> at a time <NUM> in which the portable terminal escapes from the idle state by using sensing information obtained by the sensors currently being operating, and thereafter can allow the portable terminal to transitions to a sleep state <NUM>.

<FIG> is a flowchart illustrating a process of reducing power consumption of a portable terminal according to an example.

Referring to <FIG>, the portable terminal gathers sensing information for recognizing a state of the portable terminal in step <NUM>, and then proceeding to step <NUM>, analyzes the sensing information gathered in step <NUM> in order to recognize the state of the portable terminal. Thereafter, proceeding to step <NUM>, the portable terminal determines whether it is a state in which the portable terminal enters a low-power mode. Herein, the state of entering the low-power mode is a state in which power consumption can be reduced by limiting unnecessary power usage since the portable terminal does not actually operate. An example of this state includes a state in which the portable terminal is located in a pocket of a user, a state in which the portable terminal is turned over, a state in which the portable terminal does not operate for a specific time period, and a state in which the portable terminal enters in the idle mode, etc..

If it is determined in step <NUM> that the state of the portable terminal is not the state of entering to the low-power mode, for example, if the user of the portable terminal persistently operates the portable terminal, step <NUM> is repeated.

Otherwise, if it is determined in step <NUM> that the state of the portable terminal is the state of entering to the low-power mode, proceeding to step <NUM>, the portable terminal recognizes a function of generating power consumption among functions being operated in the portable terminal. Thereafter, proceeding to step <NUM>, the portable terminal ends the function of generating power consumption to reduce power consumption generated in the portable terminal.

In this case, the portable terminal can end functions sequentially starting from a function of which power consumption is most severe, or can end the functions except for a minimum function for call reception.

For example, when the portable terminal enters the idle mode, the portable terminal can end functions being operated, such as, a music playback program, a schedule manager program, a screen illumination, etc., in order to reduce power consumption.

Thereafter, the procedure of <FIG> ends.

<FIG> is a flowchart illustrating a process of obtaining sensing information required to determine a state (or a life pattern of a user) of a portable terminal according to another example.

Referring to <FIG>, the portable terminal allows the state determination unit <NUM> to wake up in step <NUM>, and then proceeding to step <NUM>, allows the application processor <NUM> to enter a sleep mode. As such, a situation where the state determination unit <NUM> wakes up and the application processor <NUM> enters the sleep mode implies a situation where the portable terminal transitions to an idle state.

In step <NUM>, the portable terminal allows the state determination unit <NUM> in the wake-up state to obtain sensing information by operating the sensor <NUM>. In step <NUM>, the portable terminal allows the state determination unit <NUM> to analyze the obtained sensing information.

Herein, the portable terminal allows the state determination unit <NUM> to analyze a change in the sensing information in order to determine the sensing information that changes in a range of great values during a specific time period in the obtained sensing information. The sensing information that changes in the range of great values as described above can be used to determine the state (i.e., the life pattern of the user) of the portable terminal.

In step <NUM>, the portable terminal allows the state determination unit <NUM> to determine a result of an analysis process performed in step <NUM>.

If it is determined in step <NUM> that there is sensing information that can be used to determine the state of the portable terminal, proceeding to step <NUM>, the portable terminal allows the state determination unit <NUM> to store the sensing information that can be used to determine the state of the portable terminal. In this case, the state determination unit <NUM> can store the sensing information in an internal memory of the state determination unit <NUM> or the memory <NUM> of the portable terminal. If the state determination unit <NUM> stores the sensing information in the internal memory, the stored sensing information can be provided to the application processor <NUM> by using a predefined protocol (e.g., UART, I2C, memory interface, etc.) before the state determination unit <NUM> enters the sleep mode.

In step <NUM>, the portable terminal allows the state determination unit <NUM> to determine the state of the portable terminal. In step <NUM>, the portable terminal allows the state determination unit <NUM> to determine the result of step <NUM>. In this case, the state determination unit <NUM> can determine the state of the portable terminal by determining occurrence of a situation where the application processor <NUM> wakes up.

If it is determined in step <NUM> that the situation where the application processor <NUM> wakes up does not occur, the portable terminal allows the state determination unit <NUM> to re-perform step <NUM>.

Otherwise, if it is determined in step <NUM> that the situation where the application processor <NUM> wakes up does not occur, proceeding to step <NUM>, the portable terminal allows the application processor <NUM> to wake up. In step <NUM>, the portable terminal allows the woken-up application processor <NUM> to store sensing information required to recognize the state of the portable terminal in the memory, and thereafter uses the stored information to determine the life pattern of the user of the portable terminal. If the state determination unit <NUM> stores the sensing information in the memory <NUM> in step <NUM>, step <NUM> is skipped.

Additionally, if it is determined in step <NUM> that the sensing information that can be used to determine the state of the portable terminal does not exist, step <NUM> is skipped and step <NUM> is performed.

<FIG> is a flowchart illustrating a process of obtaining sensing information required to determine a state (or a life pattern of a user) of a portable terminal by a state determination unit according to an exemplary embodiment of the present invention.

Referring to <FIG>, the state determination unit <NUM> wakes up in step <NUM>, and then proceeding to step <NUM>, controls the application processor <NUM> to enter a sleep mode. Such a situation may be a case where the portable terminal enters an idle mode.

The state determination unit <NUM> allows the sensor <NUM> to operate in step <NUM>, and allows the sensor <NUM> to obtain the sensing information in step <NUM>.

In step <NUM>, the state determination unit <NUM> determines whether there is a change in the sensing information.

If it is determined in step <NUM> that the sensing information changes, proceeding to step <NUM>, the state determination unit <NUM> determines a state of a portable terminal which is moving. In step <NUM>, the state determination unit <NUM> stores the sensing information. Herein, the state of the portable terminal which is moving is a state in which the portable terminal operates by user's manipulation. When the portable terminal repetitively moves, this operation is in association with the life pattern of the user of the portable terminal.

Thereafter, the state determination unit <NUM> repeats the operation of step <NUM> to obtain sensing information required to analyze the life pattern of the user of the portable terminal.

Otherwise, if it is determined in step <NUM> that the sensing information does not change, proceeding to step <NUM>, the state determination unit <NUM> determines a state of the portable terminal which is not moving. In step <NUM>, the state determination unit <NUM> stops to store the sensing information.

In step <NUM>, the state determination unit <NUM> determines whether the sensing information is stored in an internal memory of the state determination unit <NUM>.

If it is determined in step <NUM> that the sensing information is stored in the memory <NUM> of the portable terminal instead of the internal memory, the procedure of <FIG> ends.

Otherwise, if it is determined in step <NUM> that the sensing information is stored in the internal memory of the state determination unit <NUM>, proceeding to step <NUM>, the state determination unit <NUM> reports the existence of the stored sensing information to the application processor <NUM> before entering a sleep mode, and thereafter transmits the stored sensing information to the application processor <NUM>. In this case, the state determination unit <NUM> can delete the sensing information transmitted to the application processor <NUM> so as to ensure a storage space.

<FIG> is a flowchart illustrating a process of determining a state (or a life pattern of a user) of a portable terminal by an application processor according to another exemplary embodiment of the present invention.

Referring to <FIG>, the application processor <NUM> wakes up in step <NUM> when the portable terminal escapes from an idle state. In step <NUM>, the application processor <NUM> determines whether sensing information stored by the state determination unit <NUM> exists. In this case, if the state determination unit <NUM> stores sensing information in its internal memory, the state determination unit <NUM> transmits information indicating the existence of the stored sensing information to the application processor <NUM> before entering a sleep mode.

If it is determined in step <NUM> that the sensing information stored by the state determination unit <NUM> exists, proceeding to step <NUM>, the application processor <NUM> receives the sensing information from the state determination unit <NUM>. In step <NUM>, the application processor <NUM> stores the sensing information received from the state determination unit <NUM> in the internal memory <NUM> of the portable terminal, That is, the application processor <NUM> may move the sensing information stored in the memory of the state determination unit <NUM> to the internal memory <NUM> of the portable terminal so as to periodically determine the life pattern of the user of the portable terminal. The state determination unit <NUM> and the application processor <NUM> may exchange the sensing information by using a pre-defined protocol (i.e., UART, I2C, memory interface, etc.).

In step <NUM>, the application processor <NUM> analyzes the life pattern of the user of the portable terminal by using the pre-stored sensing information. If the application processor <NUM> determines in step <NUM> that there is no sensing information stored by the state determination unit <NUM> (i.e., if the state determination unit <NUM> directly stores the sensing information in the internal memory <NUM> of the portable terminal instead of its own memory), the procedure proceeds to step <NUM>.

In step <NUM>, the application processor <NUM> performs an operation corresponding to the life pattern of the user. Then, the procedure of <FIG> ends.

The following operations can be performed by a portable terminal for determining a life pattern according to another exemplary embodiment of the present invention. First, if the portable terminal does not operate for a specific time duration and thus enters an idle state, the application processor <NUM> enters a sleep state and thus does not control respective modules. Additionally, when the portable terminal enters the idle state, the state determination unit <NUM> wakes up and obtains sensing information by using a sensor so as to examine a change in the sensing information. Of course, in a case where the state determination unit <NUM> allows the application processor <NUM> in the sleep state to wake up by using the sensing information, the state determination unit <NUM> enters the sleep state and thereafter allows the application processor <NUM> to wake up.

In a case where a value of the sensing information changes significantly and thus it is determined as sensing information that can be used to determine the life pattern of the user of the portable terminal even though the state determination unit <NUM> does not allow the application processor <NUM> to wake up, the sensing information is stored so that the stored sensing information is used when the life pattern is determined.

For example, if the state determination unit <NUM> determines that a value of an acceleration sensor changes significantly and that a Global Positioning System (GPS) position changes persistently, the state determination unit <NUM> determines the life pattern indicating a movement of the user and periodically stores location/speed/time data. In this case, if the value of the acceleration sensor does no longed change, the state determination unit <NUM> determines the life pattern as the user does not move, and stops to store the data.

The application processor <NUM> analyzes the stored data so as to be able to determine a life pattern indicating a specific pattern frequently used by the user. After analyzing the life pattern, the application processor <NUM> can receive in advance traffic information of a path which is expected to be used by the user to go to work.

Additionally, when the application processor <NUM> analyzes data obtained by receiving a telephone call on a bus way home, and recognizes information indicating that the user is on way home, then the application processor <NUM> can perform tasks such as opening a garage door and operating a boiler by using home networking according to an expected time of arrival.

Claim 1:
An electronic device comprising:
a sensor (<NUM>) for sensing motion of the electronic device;
an application processor (<NUM>); and
a state determination unit (<NUM>) configured to:
while the application processor is in a sleep state, control to cause sensing information relating to the motion of the electronic device sensed by the sensor to be stored in a memory of the state determination unit, and
before entering a sleep state, transmitting at least one of the stored sensing information and information related to existence of the stored sensing information to the application processor,
wherein the application processor is configured, when waking up from the sleep state, to:
obtain the sensing information from the memory of the state determination unit, and
analyze the obtained sensing information.