JP2010109582A - Communication terminal and position information acquisition adjusting program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a communication terminal acquiring position information following up change in user's situation while suppressing the battery consumption of the communication terminal, and to provide a position information acquisition adjusting program. <P>SOLUTION: A time zone estimating part 14 estimates a high probability time zone in which a probability of transition of the user's situation to a predetermined situation is high based upon a user's life-style model. A position information acquiring part 16 makes time intervals for acquiring position information in the high probability time zone estimated by the time zone estimating part 14 shorter than time intervals for acquiring it other than in the high probability time zone. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a communication terminal that adjusts an acquisition interval of position information, and a position information acquisition adjustment program.

  2. Description of the Related Art Conventionally, various services are provided to a user based on the position and time at which the user is present. For example, in Patent Document 1, based on the position of the user terminal acquired from the base station and the current time, “the user is near the home in the evening”, “is near the work place in the morning or noon”, “the evening Or, the situation of a user such as “I move to the vicinity of my home by subway or bus at night” is predicted, and “Is this home?” ? "," The next station is Kyodai Station near the house. Please get off to the right. "

In this case, the user's situation can be accurately predicted by periodically acquiring the user's position information. However, if the location information is periodically acquired, the battery consumption of the user terminal is intense and the convenience is reduced.
JP 2006-65870 A

In order to solve this problem, a method is conceivable in which the time interval for periodically acquiring position information is set to be longer to suppress battery consumption. However, if the time interval for position acquisition is set to be long, it may not be possible to follow the change in the user's situation, and the change in the user's situation may not be recognized.
The present invention has been made in order to solve the above-described problems of the prior art, and is capable of acquiring position information following a change in a user's situation while suppressing battery consumption of the communication terminal. And providing a position information acquisition adjustment program.

  In order to solve the above-mentioned problem, the invention according to claim 1 of the present invention is characterized in that the user situation depends on the life cycle information representing the daily life cycle of the user and the position information representing the place where the user is present. Model storage means for storing a lifestyle model that defines the transition order of, position information acquisition means for acquiring the current position information, and time information acquisition means for acquiring time information representing the current time, A communication terminal that is driven by a battery and estimates a situation representing a user's current situation using these means, and the user situation is determined based on a lifestyle model stored in the model storage means. A time zone estimating means for estimating a high probability time zone in which the probability of transition to a situation is higher than other time zones; The information acquisition means shortens the time interval for acquiring the position information in the high probability time zone estimated by the time zone estimation means to be shorter than the time interval for acquisition outside the high probability time zone. I will provide a.

  According to the present invention, the communication terminal estimates a high-probability time zone in which the probability that a user situation changes to a predetermined situation is higher than other time zones, and acquires position information in the estimated high-probability time zone. Since the time interval to be performed is shorter than the time interval to be acquired outside the high probability time zone, it becomes possible to acquire location information following changes in the user's situation while suppressing battery consumption of the communication terminal. .

According to a second aspect of the present invention, in the communication terminal according to the first aspect, the time zone estimation means includes an average time and a standard time estimated when the user situation has transitioned to the predetermined situation in the past. A deviation is calculated, and the high probability time zone is estimated based on the calculated average time and the standard deviation.
According to the present invention, it is possible to estimate a high-probability time zone based on the average time and standard deviation of the time estimated that a user situation has transitioned to a predetermined situation in the past, and easily by simple calculation. It is possible to estimate a high probability time zone.

According to a third aspect of the present invention, in the communication terminal according to the second aspect, the time zone estimating means starts a time obtained by subtracting a value obtained by doubling the standard deviation from the average time from the start of the high probability time zone. A time obtained by adding a value obtained by doubling the standard deviation to the average time is estimated as an end time of the high probability time zone.
According to the present invention, an appropriate high probability time zone can be estimated.

The invention according to claim 4 further comprises a time zone upper limit storage means for storing an upper limit for limiting the length of the high probability time zone in the communication terminal according to claim 2 or 3, The time zone estimation means estimates the upper limit value as a high probability time zone when a time zone calculated based on the average time and the standard deviation exceeds the upper limit value.
According to the present invention, by providing the upper limit value, it is possible to prevent the high probability time zone from exceeding the upper limit value and to prevent the battery from being consumed.

According to a fifth aspect of the present invention, in the communication terminal according to the fourth aspect, the time zone estimating means is configured such that a time zone calculated based on the average time and the standard deviation exceeds the upper limit value. In addition, according to the remaining amount of the battery, it is determined whether or not to estimate the upper limit value as a high probability time zone.
According to the present invention, it is possible to determine which of the upper limit value and the calculated time zone is to be estimated as the high probability time zone in consideration of the remaining battery level. The degree can be adjusted.

According to a sixth aspect of the present invention, in the communication terminal according to any one of the first to fifth aspects, the position information acquiring unit is estimated by the time zone estimating unit according to a remaining amount of the battery. The time interval for acquiring the position information in the high probability time zone is adjusted.
According to the present invention, the degree of battery consumption can be adjusted in accordance with the remaining battery level.

The invention according to claim 7 is a lifestyle in which the computer defines a transition order of the user's situations depending on life cycle information representing a life cycle of the user and position information representing a place where the user is present. Model storage means for storing a model, and time zone estimation for estimating a high-probability time zone in which the probability that the user's situation changes is higher than other time zones based on the lifestyle model stored in the model storage means And a position information acquisition means for making a time interval for acquiring position information in a high probability time zone estimated by the time zone estimation means shorter than a time interval acquired in a time other than the high probability time zone. A position information acquisition adjustment program is provided.
According to the present invention, the position information acquisition adjustment program is stored in the computer and executed, so that the position information can be acquired following the change of the user's situation while suppressing the battery consumption of the computer.

  According to the present invention, the communication terminal estimates a high-probability time zone in which the probability that a user situation changes to a predetermined situation is higher than other time zones, and acquires position information in the estimated high-probability time zone. Since the time interval to be performed is shorter than the time interval to be acquired outside the high probability time zone, it becomes possible to acquire location information following changes in the user's situation while suppressing battery consumption of the communication terminal. .

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings referred to in the following description, the same parts as those in the other drawings are denoted by the same reference numerals.
(overall structure)
FIG. 1 is a diagram showing an overall configuration of a communication system according to an embodiment of the present invention. As shown in the figure, the communication system is based on a foldable mobile communication terminal 100 carried by a user, a server 200 that manages an application program for downloading to the mobile communication terminal 100, and a GPS (Global Positioning System). And a positioning device 300 that transmits a GPS signal including a satellite ID and time.

(Hardware configuration of mobile communication terminal)
FIG. 2 is a block diagram illustrating a hardware configuration of the mobile communication terminal 100. As shown in the figure, the mobile communication terminal 100 displays a CPU 101 that controls the whole, a storage device 102 that stores software such as programs and data, a communication interface 103 for performing wireless communication, and various screens. A display device 104, an input device 105 that inputs an input signal corresponding to an operation such as pressing a key or opening / closing a terminal to the terminal 100, a sound output device 106 that outputs a sound such as a sound or a sound effect, and a user's voice A voice input device 107 such as a microphone, an internal clock 108 for timing the date, a GPS receiver 109 for receiving a GPS signal from the positioning device 300, and a rechargeable battery 110.

  The storage device 102 includes a ROM 121, a RAM 122, and a nonvolatile memory 123. The ROM 121 stores an operating system, for example, software for executing an application program conforming to the Java (registered trademark) specification. The RAM 122 temporarily stores various programs and data.

  The nonvolatile memory 123 is provided with an application storage area 123a and a scratch pad 123b. The application storage area 123a stores application programs downloaded from the server 200. Not only downloading but also the application program can be stored in the application storage area 123a from the time of manufacture of the mobile communication terminal 100. The scratch pad 123b stores data downloaded from the server 200 and data created by starting an application program or executing an application program. In the present embodiment, the scratch pad 123b includes calendar data for determining the day of the week, sound data for output from the sound output device 106, image data for display on the display device 104, user history log, and positioning. Position information and the like are stored. The mobile communication terminal 100 may include an external storage device other than the scratch pad 123b as a memory for storing data.

(Functional configuration of mobile communication terminal)
Next, the functional configuration of the mobile communication terminal 100 will be described with reference to FIG. Note that the functional configuration shown in the figure is that the CPU 101 of the mobile communication terminal 100 executes processing according to a program stored in the ROM 121, the application storage area 123a, or the like, or a recording medium such as the RAM 122, the scratch pad 123b, or the like. It is realized.

(Area definition part)
The area definition unit 11 defines an area where the user stays according to the purpose in association with the position information. In this embodiment, the area includes a home area (hereinafter referred to as “HA”), a temporary home area (hereinafter referred to as “temporary HA”), a work area (hereinafter referred to as “WA”), a temporary work area (hereinafter referred to as “temporary”). WA ”,“ favorite area ”, and“ specific area ”. Here, “HA” is a main place of residence of a user such as a home or a home. “Temporary HA” is a place where a user rarely goes to bed on a trip, business trip or the like, such as a friend's house or a hotel. “WA” is a user's main work place. “Temporary WA” is a place where a user rarely works for business, meetings, etc., such as a customer or event venue. The “favorite area” is an area set as a favorite place of the user. The “specific area” is an area set in order for the content provider to provide a service to the user in the area.

The area definition unit 11 defines an area name based on an input by the user from the input device 105. The area definition unit 11 stores the input area name in the scratch pad 123b in association with the position information of the mobile communication terminal 100.
In addition, the area definition unit 11 notifies the user of a question when the user stays in an undefined area for a predetermined time (for example, 1 hour) or more, and based on the answer to the question, the undefined area Define In addition, as a method of notifying a user of a question, a method of displaying the question content in characters on the display device 104 or a method of outputting the question content from the sound output device 106 by voice can be considered. In addition, as a method for a user to answer a question, a method of inputting answer contents from the input device 105 such as a key or a method of inputting voice from the voice input device 107 can be considered.

(User history log storage)
The user history log storage unit 12 stores a user history log representing a history of user behavior in the scratch pad 123b. FIG. 4 shows an example of the data structure of the user history log. As shown in the figure, the user history log includes date and time, weekday / holiday classification, location information, area type, situation, estimated wake-up time / estimated bedtime, displayed dialogue ID, answer to question, and terminal open / close Terminal operation logs such as time and key operation time are included. These user history logs include, for example, when an image displaying a dialogue is displayed on the display device 104, when a user answers a question, when positioning is performed by GPS, and when the user operates the mobile communication terminal 100. It is memorized at the time of performing.

(Model storage unit)
The model storage unit 13 defines a lifestyle model and stores the defined situation transition model in the scratch pad 123b. Here, the “lifestyle model” is a model that defines the transition order of the user's situation depending on the life cycle information representing the daily life cycle of the user and the position information representing the place where the user is present.
“Life cycle information” refers to information representing a daily life cycle that is different for each user, such as the user's wake-up time, bedtime, start time, end time, wake-up time zone, and sleep time zone. The model storage unit 13 includes user-set time information indicating times such as wake-up time, bedtime, start time, and end time input by the user, and “wake-up time zone”, “sleep time zone”, and “wake-up time”. Life cycle information is defined by associating life cycle classification items such as “sleeping time”, “starting time”, and “working time”.

Further, the “situation” represents a situation or state where the user is placed. In the present embodiment, situations can be mainly classified into point situations (PS), line situations (LS), and special situations (SS).
The “point situation (PS)” is a situation that is estimated based on the life cycle information of the user and the area where the user is located, and is the starting point of the action. Point situations include getting up, starting work, starting work, ending work, returning home, going to bed, going out, and the like. A point situation automatically transitions to the associated line situation.

A “line situation (LS)” is a situation that connects two point situations, and there are during preparation, going to work, working, overtime, going home, going home, sleeping, going out, and the like.
A “special situation (SS)” is a situation that is neither a point situation nor a line situation, and in this embodiment, there is a situation called “being lost”. This is a situation when the current user situation is unknown, such as at the first activation or before the first acquisition of position information.

FIG. 5 shows an example of a lifestyle model. In the figure, situations such as “sleeping”, “going out”, “getting up”, “medium condition” indicate life cycle information such as “before bedtime”, “before worktime”, and “HA”, The state of transition according to areas such as “WA” and “EX” is conceptually shown. Note that “EX” in the figure refers to an undefined area (except area) other than the defined area.
FIG. 6 shows an example when the lifestyle model shown in FIG. 5 is expressed in a table format. In the table shown in the figure, the situation before the user transition, the area (HA, provisional HA, WA, provisional WA, EX), life cycle information (wake-up time zone, start time, work time, etc.), current Is associated with the situation.

  FIG. 7 shows an example of a general situation transition pattern on weekdays. As shown in the figure, the user's situation on weekdays transitions to “wake-up” and “medium condition” in HA, and when the user moves from HA to EX, the situation further shifts to “commuting to work” and “commuting to work”. When the user moves from EX to WA, the situation further shifts to “work start”, “work in progress”, “overtime start”, and “overtime work”, and when the user moves from WA to EX, the situation further becomes “ When the user moves from EX to HA, the situation further transitions to “return home”, “at home”, “sleeping”, and “sleeping”.

  FIG. 8 shows an example of a general situation transition pattern on a holiday. As shown in the figure, the situation of a user on a holiday transitions from “wake up” to “at home” in HA, and when the user moves from HA to EX, the situation further transitions to “outing” and “out of office” When the user moves from EX to HA, the situation further transitions to “going home”, “at home”, “sleeping”, and “sleeping”. Thus, since the situation transition pattern generally differs between weekdays and holidays, the model definition unit 13 defines two types of lifestyle models, one for weekdays and one for holidays, and associates them with weekday holidays. Remember.

The life cycle information is defined based on user set time information input by the user. The life cycle represented by the life cycle information may be different from the actual life cycle due to a change in the life cycle of the user. Therefore, the model storage unit 13 has a function of correcting life cycle information based on the user history log stored in the user history log storage unit 12. Specifically, for example, the model storage unit 13 uses the average value of the user's past estimated bedtime and the average value of the past estimated wake-up time, and the bedtime, wake-up time, and bedtime included in the life cycle information. Correct the belt, wake-up time zone, attendance start time, etc.
The model storage unit 13 has a function of estimating the latest bedtime and wake-up time at a predetermined timing every day, and recording the estimated bedtime and estimated wake-up time as a user history log.

(Time zone estimation part)
Based on the user's lifestyle model stored in the model storage unit 13, the time zone estimation unit 14 is a time zone in which the probability that the user's situation changes is higher than other time zones (hereinafter, “high probability time zone”). Estimated).
Specifically, the time zone estimation unit 14 calculates an average time (μ) and a standard deviation (σ) when it is estimated that the user's situation has transitioned to a predetermined situation, and the calculated average time A high probability time zone is estimated based on the standard deviation. As the above-mentioned “predetermined situation” to be estimated in the high probability time zone, a situation that transitions with a change in the user's location information, for example, “commuting start”, “going out”, “work end”, etc. is preferable. .

FIG. 9 is an example of a graph showing the probability distribution of the time when the user situation transitions to “start work”. This graph is based on the time information when the user for the past n (n is a natural number) days transitions to the situation “start work”, the time when the user transitions to the situation “start work”, and the frequency the vertical axis Is plotted in
When the time when the user has transitioned to the situation “start work” for the past n days is x ₁ , x ₂ ,..., X _n , the average time (weighted average) μ of these times is:
μ = (w ₁ x ₁ + w ₂ x ₂ +... w _n x _n ) / (w ₁ + w ₂ +... w _n )
Indicated by The average value is not limited to the weighted average, but may be an arithmetic average.
The standard deviation σ of these times is
σ = (((x ₁ −μ) ² + (x ₂ −μ) ² +... + (x _n −μ) ² ) / n) ^1/2
Indicated by

  For example, the time zone estimation unit 14 calculates the time obtained by subtracting the value (2σ) obtained by doubling the standard deviation from the average time (μ) as the start time of the high probability time zone, and doubles the standard deviation. The time obtained by adding the value to the average time is calculated as the end time of the high probability time zone. That is, the high probability time zone is calculated as a time zone of 2σ before and after the average time. By calculating the high probability time zone in this way, the probability of situation transition in the high probability time zone is about 96%, which can be a high probability close to 100%.

  The time zone upper limit storage unit 15 stores an upper limit value for limiting the length of the high probability time zone, and the time zone estimation unit 14 is calculated based on the average time and the standard deviation. If the determined time zone exceeds the upper limit value, the upper limit value is estimated as a high probability time zone. As will be described later, in the high-probability time zone, control is performed to shorten the time interval for acquiring position information, but in this way, it is prevented that the high-probability time zone is set longer than the upper limit value. Thus, the consumption of the battery 110 can be prevented.

  In addition, when the time zone calculated based on the average time and the standard deviation exceeds the upper limit value, the time zone estimation unit 14 sets the upper limit value as a high probability time zone according to the remaining amount of the battery 110. Decide whether to estimate. Specifically, when the remaining amount of the battery 110 is less than a predetermined value, the upper limit value is estimated as a high probability time zone in order to prevent the battery 110 from being consumed. On the other hand, when the remaining amount of the battery 110 is equal to or greater than a predetermined value, the battery 110 will not run out even if the battery 110 is consumed to some extent, so the calculation is based on the average time and the standard deviation. The estimated time zone is estimated as a high probability time zone.

(Location information acquisition unit)
The location information acquisition unit 16 periodically acquires location information of the mobile communication terminal 100 carried by the user as the location information of the user. In the present embodiment, the position information acquisition unit 16 calculates the position information of the mobile communication terminal 100 based on the GPS signal received from the positioning device 300 by the GPS receiver 109 mounted on the mobile communication terminal 100. Note that the position information acquisition method is not limited to GPS positioning. For example, the position information of the base station where the mobile communication terminal 100 is located may be regarded as the user position information, or measured by a gyro. Also good. When the position information of the base station where the mobile communication terminal 100 is located is regarded as the position information of the user, the positioning device 300 provides position information that assists the terminal position positioning.

The position information acquisition unit 16 has a function of adjusting a time interval for acquiring position information. Specifically, the position information acquisition unit 16 makes the time interval for acquiring the position information in the high probability time zone estimated by the time zone estimation unit 14 shorter than the time interval acquired in other than the high probability time zone. For example, the position information acquisition unit 16 performs control so as to acquire position information at intervals of 30 minutes except in the high probability time zone, and to acquire position information at intervals of 15 minutes in the high probability time zone.
Further, the position information acquisition unit 16 adjusts the time interval for acquiring the position information in the high probability time zone according to the remaining amount of the battery 110. For example, the position information acquisition unit 16 acquires position information at 10-minute intervals when the remaining amount of the battery 110 is equal to or greater than a predetermined value, and acquires position information at 20-minute intervals when it is less than the predetermined value. It is possible to control to obtain.

(Time information acquisition unit)
The time information acquisition unit 17 acquires time information representing the current time from the internal clock 108 provided in the mobile communication terminal 100. Note that the time information acquisition method is not limited to this, and for example, the time information can be acquired from an external server device.
(Situation estimation unit)
The situation estimation unit 18 includes the lifestyle model defined by the model storage unit 13, the position information acquired by the position information acquisition unit 16, the time information acquired by the time information acquisition unit 17, and the user before the transition. Estimate the user's current situation based on the situation.
Specifically, the situation estimation unit 18 determines which classification item (wake-up time zone, start-up time) of the user's life cycle is the current time represented by the time information acquired by the time information acquisition unit 17 based on the life cycle information. Time, working time, etc.). In addition, the situation estimation unit 18 determines an area corresponding to the position information acquired by the position information acquisition unit 16.

  Further, the situation estimation unit 18 acquires the latest situation, that is, the situation before the transition, from the user history log. Then, the situation estimation unit 18 acquires the current situation corresponding to the determined life cycle classification item, the determined area, and the acquired situation before the transition from the lifestyle model, and acquires the acquired current situation. Is the current situation of the user. The estimated situation is stored in the user history log and used for the next situation estimation.

(Location information acquisition adjustment program)
As described above, the program stored in the ROM 121 and the application program stored in the application storage area 123a include the position information acquisition adjustment program, and the position information acquisition adjustment program is stored in the mobile communication terminal (“computer”). ), The computer stores the model storage unit 13 that stores the lifestyle model, and the probability that the user's situation changes based on the lifestyle model stored in the model storage unit 13 is higher than in other time zones. A time zone estimation unit 14 that estimates a high high probability time zone, and a time interval for acquiring position information in the high probability time zone estimated by the time zone estimation unit 14 is greater than a time interval that is acquired outside the high probability time zone. This is a program for causing the position information acquisition unit 16 to be shortened to function.

(Situation estimation process)
Next, a procedure of situation estimation processing executed by the mobile communication terminal 100 will be described with reference to the flowchart shown in FIG.
First, the user operates the mobile communication terminal 100 to give an instruction to download an application program from the server 200. As a result, the mobile communication terminal 100 downloads the application program and accompanying data from the server 200, stores the application program in the application storage area 123a, and stores the data in the scratch pad 123b.

  Next, the user performs an operation of starting the application program. Accordingly, the mobile communication terminal 100 displays an initial setting screen on the display device 104 by executing processing according to the application program. The user inputs initial setting items interactively from the initial setting screen. Initial setting items include user name, birthday, wake-up time, bedtime, start-up time, work-time information such as user-set time information, weekday classification by day of the week, HA, WA, favorite area, etc. There is an area name.

  The mobile communication terminal 100 performs initial setting based on the input initial setting item (step S1). Specifically, the mobile communication terminal 100 stores the input data in the scratch pad 123b. The area definition unit 11 defines an area by associating the input area name such as HA and WA with the position information when the area name is input, and stores the area in the scratch pad 123b. The model storage unit 13 defines life cycle information based on the input user set time information. And the model memory | storage part 13 defines the transition order of the user's situation depending on the defined life cycle information and area, and memorize | stores it in the scratchpad 123b as a lifestyle model.

The situation estimation unit 18 initializes the situation. In the present embodiment, when one or more HA and WA are input by the user, the situation is initially set to “being lost”.
Next, the time information acquisition unit 17 acquires time information from the internal clock 108 (step S2). Next, the position information acquisition unit 16 acquires the position information of the mobile communication terminal 100 by periodically receiving GPS signals from the positioning device 300 (step S3).
Next, the situation estimation unit 18 acquires the situation before the user transition from the latest user history log. Then, the situation estimation unit 18 is based on the situation transition model, the position information acquired by the position information acquisition unit 16, the time information acquired by the time information acquisition unit 17, and the situation before the user transition. The user's current situation is estimated (step S4).

(Time interval control processing)
Next, with reference to the flowchart shown in FIG. 11, a processing procedure for controlling the time interval for acquiring position information in step S3 of FIG. 10 will be described.
The time zone estimation unit 14 is based on the user's lifestyle model, the average value of the transition time to the predetermined situation estimated by the situation estimation unit 18, the standard deviation, etc., and the probability that the user's situation will transition to the predetermined situation A high probability time zone with a high is estimated (step S21).
The position information acquisition unit 16 determines whether or not the current time acquired by the time information acquisition unit 17 is within the high probability time zone (step S22).

  When it is determined that the current time is outside the high probability time zone (step S22: No), the position information acquisition unit 16 acquires position information at a normal time interval (for example, 30 minutes) (step S23). On the other hand, when it is determined that the current time is within the high probability time zone (step S22: Yes), the location information acquisition unit 16 acquires location information at a shorter time interval (for example, 15 minutes) than usual (step 15). S24).

  As described above, the mobile communication terminal 100 estimates a high-probability time zone in which a user situation has a high probability of transitioning to a predetermined situation, and sets a time interval for acquiring position information in the high-probability time zone to a high probability. Since it is shorter than the time interval acquired outside the time zone, it is possible to accurately estimate the situation by acquiring position information following the change of the user's situation while suppressing battery consumption of the mobile communication terminal 100. Become.

In addition, it is possible to estimate the high probability time zone based on the average value and standard deviation of the time when the user's situation has transitioned to a predetermined situation in the past, or to set the upper limit value of the high probability time zone, thereby While suppressing consumption, it is possible to shorten the time interval for acquiring position information in an appropriate time zone, accurately capture changes in position information, and accurately estimate situations.
In the above-described embodiment, the mobile communication terminal 100 has been described as having each function illustrated in FIG. 3, but the present invention is not limited to this, and the server 200 has each function illustrated in FIG. 3. Alternatively, a plurality of devices may have the functions shown in FIG.

  The present invention follows a change in a user's situation while suppressing battery consumption when the communication terminal is driven by a battery and is carried by the user to acquire position information for estimating the user's current situation. It becomes possible to acquire position information.

1 is a diagram illustrating an overall configuration of a communication system according to an embodiment of the present invention. It is a block diagram which shows the hardware constitutions of the mobile communication terminal which concerns on the same embodiment. It is a block diagram which shows the function structure of the mobile communication terminal which concerns on the same embodiment. It is a figure showing an example of data composition of a user history log concerning the embodiment. It is a figure which shows an example of the situation transition model which concerns on the embodiment. It is a figure which shows an example at the time of expressing the situation transition model shown in FIG. 5 in a table format. It is a figure which shows an example of the transition pattern of the weekday situation which concerns on the embodiment. It is a figure which shows an example of the transition pattern of the holiday situation which concerns on the embodiment. It is a figure which shows probability distribution of the time when the user situation which concerns on the embodiment changes to "commuting start". It is a flowchart which shows the procedure of the situation estimation process which the communication terminal which concerns on the embodiment performs. It is a flowchart which shows the process sequence which controls the time interval which acquires position information in FIG.10 S3 which concerns on the embodiment.

Explanation of symbols

11 Area definition unit 12 User history log storage unit 13 Model storage unit 14 Time zone estimation unit 15 Time zone upper limit value storage unit 16 Position information acquisition unit 17 Time information acquisition unit 18 Situation estimation unit 100 Mobile communication terminal 101 CPU
102 Storage Device 103 Communication Interface 104 Display Device 105 Input Device 106 Output Device 107 Voice Input Device 108 Internal Clock 109 Receiver 110 Battery 123a Application Storage Area 123b Scratch Pad 123 Nonvolatile Memory 200 Server 300 Positioning Device

Claims (7)

A model storage means for storing a lifestyle model that defines a transition order of the user's situations depending on life cycle information representing a daily life cycle of the user and position information representing a place where the user is located; It has position information acquisition means for acquiring position information and time information acquisition means for acquiring time information representing the current time, and is driven by a battery, and using these means, a situation representing the current situation of the user is obtained. A communication terminal to estimate,
Based on the lifestyle model stored in the model storage means, comprising a time zone estimation means for estimating a high probability time zone in which the probability of the user situation transitioning to a predetermined situation is higher than other time zones,
The position information acquisition means includes
A communication terminal characterized in that a time interval for acquiring position information in a high probability time zone estimated by the time zone estimation means is shorter than a time interval for acquiring information other than in the high probability time zone. The time zone estimating means includes
Calculating an average time and a standard deviation of times estimated in the past that the user situation has transitioned to the predetermined situation;
The communication terminal according to claim 1, wherein the high probability time zone is estimated based on the calculated average time and the standard deviation. The time zone estimating means includes
The time obtained by subtracting the value obtained by doubling the standard deviation from the average time is set as the start time of the high probability time zone, and the time obtained by adding the value obtained by doubling the standard deviation to the average time is set in the high probability time zone. The communication terminal according to claim 2, wherein the communication terminal is estimated as an end time. A time zone upper limit value storing means for storing an upper limit value for limiting the length of the high probability time zone;
The time zone estimating means includes
4. The upper limit value is estimated as a high probability time zone when a time zone calculated based on the average time and the standard deviation exceeds the upper limit value. Communication terminal. The time zone estimating means includes
Whether or not to estimate the upper limit value as a high probability time zone according to the remaining amount of the battery when the time zone calculated based on the average time and the standard deviation exceeds the upper limit value The communication terminal according to claim 4, wherein the communication terminal is determined. The position information acquisition means includes
6. The time interval for acquiring position information in the high probability time zone estimated by the time zone estimation means is adjusted according to the remaining amount of the battery. 6. Communication terminal. Computer
Model storage means for storing a lifestyle model that defines a transition order of the user's situations depending on life cycle information that represents a user's daily life cycle and position information that represents the location of the user;
Based on the lifestyle model stored in the model storage means, a time zone estimation means for estimating a high probability time zone in which the probability that the user situation will change is higher than other time zones;
Position information acquisition for causing a time interval for acquiring position information in the high probability time zone estimated by the time zone estimation means to function as a position information acquisition means for making it shorter than a time interval acquired outside the high probability time zone Adjustment program.

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