JP4985295B2 - Mobile terminal device - Google Patents

Description

  The present invention relates to a mobile terminal device such as a mobile phone, and more particularly to a mobile terminal device having a navigation function for guiding to a destination.

  Currently, many mobile phones, which are examples of mobile terminal devices, are equipped with a GPS function that receives radio waves from a GPS (Global Positioning System) satellite and measures the current position. In addition to displaying the current position on the map displayed on the screen, it also has a navigation function for guiding to the destination.

  The mobile phone activates the navigation function, and the user sets the time interval for positioning by the GPS function, so that the current position is periodically measured at the time interval by the time measurement by the timer, and the positioning result is displayed on the screen. Display on the displayed map. In order to grasp position information as accurate as possible, the current position can be displayed more accurately on the map of the screen by shortening the positioning interval and frequently updating the position information.

  However, as the positioning interval is shortened, the number of positioning times until reaching the destination increases, and the power consumption associated with positioning increases. From the viewpoint of power saving, it is preferable to increase the regular positioning interval. However, in this case, for example, when the user reaches a right turn or left turn point such as an intersection, the position information by the previous positioning is updated. Therefore, there is a possibility that the accurate position information is not displayed at the timing when the user needs the position information.

  In addition, for example, even when the vehicle stops at a red signal and has not moved from the previous positioning position, since the positioning timing is determined only at the time interval, there is a possibility that useless positioning may be performed.

On the other hand, in the navigation function using the GPS function, an invention is disclosed in which control for automatically adjusting the positioning cycle by the GPS function is performed (Patent Document 1 below). The navigation device of Patent Document 1 is equipped with a gyro sensor that detects a moving speed and a moving direction, and calculates a positioning time interval according to the distance to the next road branch point.
JP 2003-207351 A

  However, since the navigation device of Patent Document 1 calculates a positioning cycle according to the distance to the next road branch point, for example, when traveling on an expressway, the distance to the next road branch point is If it is long, the time interval of positioning becomes long, but there is a possibility that positioning is performed a plurality of times until reaching the road junction.

  Moreover, the navigation apparatus of patent document 1 presupposes the apparatus mounted in a vehicle, and is not suitable for grasping | ascertaining the present position of the user who is walking. Specifically, since the movement of the navigation device (or user) is detected by the gyro sensor, positioning is performed even during movement other than walking such as a telephone or a bus. Since the destination of the movement by train or bus is determined, the movement is detected by the gyro sensor even though it is not necessary to confirm the current position, so that unnecessary positioning is performed.

  Further, even when the user is stopped due to a signal or the like, the mobile terminal device is not always stationary (such as a bag or a pocket). Therefore, the gyro sensor cannot accurately determine whether the user is moving.

  Therefore, an object of the present invention is to provide a portable terminal device that can automatically determine the positioning timing at a required position according to the situation while saving power in a portable terminal device carried by a walking user. It is to provide.

  In order to achieve the above object, a portable terminal device of the present invention incorporates a pedometer and uses the number of steps counted by the pedometer as a positioning timing. When GPS positioning is performed at the beginning of navigation, the number of steps up to the next positioning timing is calculated based on the distance or route from the current position to the destination, and the calculated time until the next positioning timing is calculated. When the pedometer counts the number of steps, the next GPS positioning is performed, and the number of steps until the next positioning timing is calculated based on the current position obtained by this GPS positioning.

  The number of steps until the next positioning timing is, for example, as the number of steps from the current position to the next route change point on the route to the destination, and as the distance from the current position to the destination decreases. This is the number of steps set so that the number of steps until the positioning timing is reduced.

  According to the present invention, since the movement by the user's walking is detected by the number of steps counted by the pedometer, the actual movement distance by the user's walking can be grasped with high accuracy, and positioning can be performed according to the movement by the user's walking. Positioning timing can be accurately determined so that positioning is performed at a necessary position.

  Embodiments of the present invention will be described below with reference to the drawings. However, such an embodiment does not limit the technical scope of the present invention.

  In the embodiment of the present invention, a mobile phone will be described as an example. However, the present invention can be applied to a mobile terminal device such as a PDA (Personal Digital Assistant) and a notebook personal computer in addition to the mobile phone. .

  FIG. 1 is a diagram illustrating a block configuration example of a mobile terminal device according to an embodiment of the present invention. The mobile terminal device includes an application control unit 100 and a wireless control unit 110. The application control unit 100 includes an application program for executing the navigation function of the present invention using GPS and a memory 101 for storing various data, and the application CPU 103 executes the various application programs. The application CPU 103 functions as a communication control unit, a navigation control unit, a positioning timing calculation unit, and a pedometer control unit. The mobile terminal device has a GPS (Global Positioning System) function, and the GPS control unit 104 executes GPS positioning. The display unit 105 configured with a liquid crystal display or the like can display a map by a navigation function. The mobile terminal device may store the map data in the memory 101 and read and display it, or may download and display the map data using the Internet function.

  Further, the mobile terminal device includes a pedometer 109. In the embodiment of the present invention, as will be described in detail below, the user's step count counted by the pedometer 109 is used as the positioning timing.

  The mobile terminal device also includes a speaker and a microphone, an acoustic control unit 106 for controlling an acoustic signal input and output from the speaker and microphone for calls, an interface (Audio Interface Unit: AIU) with the speaker and microphone, and the like. ) 107 is also provided. The key 108 is an input means for inputting numbers and characters. Further, the wireless control unit 110 includes a CPU 111, an interface 112, and a wireless signal transmission / reception unit (RF) 113 that control transmission / reception of wireless signals in various communications such as telephone, electronic mail, and the Internet. The wireless control unit 110 functions as a communication control unit. Although not shown, a vibration function used in a so-called manner mode is also installed.

  FIG. 2 is a diagram for explaining the first positioning timing determination operation of the mobile terminal device according to the embodiment of the present invention. The first positioning timing determination operation is an operation of the CPU 103 that functions as a first positioning timing calculation unit, and the timing to reach the vicinity of the route change point is determined as the positioning timing (route change point control). First, the navigation function is activated, the user sets a destination, and as an initial operation, positioning is performed at the timing when navigation is started. In FIG. 2, the current position at the timing when navigation is started is a position P1.

And the distance from the position P1 to the next course change point P2 is acquired from map information. For example, when the distance from the position P1 to the position P2 is 50 m, the number of steps from the moving distance per step (for example, 0.5 m as an initial value) to the position P2 is calculated as 100 steps (50 m / 0.5 m). can do. Therefore,
By performing positioning at the timing when the number of steps counted by the pedometer 109 at the position P1 + 100 steps, it is possible to acquire position information by GPS near the position P2.

  However, since the moving distance per step of the user is each person, it is necessary to adjust according to the user. In the embodiment of the present invention, the moving distance per step is adjusted for each positioning timing. Specifically, in FIG. 4, for example, when the actual moving distance as a result of positioning at the time of walking 100 steps is 40 m, the moving distance per step of the user is 0.4 m, and the moving distance per step Is changed to 0.4 m and stored.

Subsequently, the distance from the position P2 to the next course change point P3 is acquired from the map information. For example, when the distance from the position P2 to the position P3 is 60 m, the number of steps from the moving distance per step (0.4 m of the value corrected above) to the position P3 is 150 steps (60 m / 0.4 m). Can be calculated. Therefore, by performing the next positioning at the timing when the number of steps counted by the pedometer 109 at the position P2 +150 steps, it is possible to acquire position information by GPS near the position P3.

  After positioning by moving 150 steps, the movement distance per step is corrected again as described above, and then the number of steps to the next course change point P4 is calculated. By repeating such an operation until reaching the destination, it is possible to perform positioning only at the route change point.

  Therefore, regardless of the distance to the route change point, positioning is performed only at the route change point, and positioning is not performed until the route change point is reached, so the number of positioning is automatically adjusted to the minimum necessary number. can do. In addition, regardless of whether the route change point is far or near, positioning is performed only at the route change point, and a minimum number of positionings can be realized without leaking a portion that requires positioning.

  In addition, since the moving distance is based on the number of steps counted by the pedometer 109, the pedometer 109 does not advance while the user stops, so the timing for moving to the course change point (next positioning timing) ) (If the next positioning timing is counted by time, even if the user stops, the time counting will proceed and positioning may be performed before reaching the route change point.) Is).

  FIG. 3 is a diagram illustrating a second positioning timing determination operation of the mobile terminal device according to the embodiment of the present invention. The second positioning timing determination operation is an operation of the CPU 103 functioning as a second positioning timing calculation unit, and the positioning timing is automatically adjusted according to the distance to the destination (destination control). First, the navigation function is activated, the user sets a destination, and as an initial operation, positioning is performed at the timing when navigation is started.

  Specifically, the longer the distance to the destination, the longer the positioning time interval, and the shorter the positioning time interval, the shorter the positioning time interval. The positioning time interval is automatically adjusted by, for example, the following calculation formula.

Step count = distance to destination (m) / movement distance per step (m) / arbitrary constant In FIG. 3, the current position at the timing when navigation is started is a position P1. The distance from the position P1 to the destination P7 is acquired from the map information. If the distance to the destination is 500 m, the moving distance per step is 0.5 m, and an arbitrary constant is 5,
Number of steps = 500 / 0.5 / 5 = 200 steps (100m)
Thus, the timing at which the next positioning is performed at the position P1 is a position P2 (position moved by 100 meters) counted 200 steps from the position P1, and the next positioning is performed at a point (near position P2) counted 200 steps. To be implemented.

  Subsequently, the number of steps until the next positioning is performed is calculated at the position P2. At the position P2, as described above, the movement distance per step may be corrected. Here, the moving distance per step remains 0.5 m.

Step count = 400 / 0.5 / 5 = 160 steps (80m)
The timing at which the next positioning is performed at the position P2 is the position P3 (position moved by 80 m) counted 160 steps from the position P2, and the next positioning is performed at the point counted 160 steps (near position P3). To be implemented.

  Thereafter, similarly, the movement distance per step is corrected, and the process of calculating the number of steps until the next positioning timing is repeated. Since the distance to the destination is gradually shortened, the time interval for positioning is also shortened.

The number of steps taken until the next positioning at position P3 is
Number of steps = 320 / 0.5 / 5 = 128 steps (64m)
In addition, the number of steps taken until the next positioning at position P4 is
Number of steps = 256 / 0.5 / 5 = 102 steps (51m)
It becomes.

  By setting an arbitrary constant to a value smaller than the normal setting value, the total number of positioning times can be reduced, and power consumption can be suppressed. If necessary, the number of steps calculated can be adjusted by changing an arbitrary constant, so that the total number of positioning can be adjusted.

  FIG. 4 is a diagram for explaining the third positioning timing determination operation of the mobile terminal device according to the embodiment of the present invention. The third positioning timing determination operation is an operation in which the first positioning timing determination operation and the second positioning timing determination operation are simultaneously performed in parallel. That is, both the positioning at the timing of reaching the vicinity of the course change point and the positioning at the timing automatically adjusted so that the positioning interval is shortened as the distance to the destination is shortened. In principle, the first positioning timing determination operation and the second positioning timing determination operation can operate independently of each other. This operation is also executed by the CPU 103 functioning as a positioning timing calculation unit.

  As shown in FIG. 4, the position P1 is a positioning position at the start of navigation, and positioning is performed at the positioning timing by the first positioning timing determination operation at the positions P2, P4, and P6. The positions P3, P5, and P7 to P13 are positions where positioning is performed at the positioning timing by the second positioning timing determination operation.

  FIG. 5 is a flowchart of the third positioning timing determination operation. The CPU 103 functions as a navigation (sometimes simply referred to as navigation) control unit, a first positioning timing calculation unit, a second positioning timing calculation unit, and a pedometer control unit. Each unit may be a separate application or may be a function in an integrated application.

  When the navigation control unit is activated based on the user's operation and navigation is started, the navigation control unit first makes a positioning request to the GPS control unit 104 (S10). In response to the positioning request, the GPS control unit 104 performs GPS positioning (S12). The positioning result is stored in the memory 101 (S14), notified to the navigation control unit (S16), and the map displayed on the display unit 105 is updated to display the current position measured (S18). . In the example of FIG. 4, the position P1 is displayed as the current position.

  When the user sets a destination, the navigation control unit determines a route from the current position to the destination based on the map information. The route may be displayed on a map displayed on the display unit 105.

  Subsequently, the navigation control unit makes an activation request to each of the first positioning timing calculation unit and the second positioning timing calculation unit (S20, S22). In that case, the distance to the next course change point is notified to the first positioning timing calculation unit, and the distance to the destination is notified to the second positioning timing calculation unit.

  The first positioning timing calculation unit calculates the positioning timing at the course change point based on the above-described operation of FIG. 2 (S24), and the second positioning timing calculation unit is based on the above-described operation of FIG. The positioning timing according to the distance to the destination is calculated (S26). The number of steps calculated in each is notified to the pedometer control unit and set (S28, S30). Here, for example, the number of steps calculated by the first positioning timing calculation unit is 100 steps, and the number of steps calculated by the second positioning timing calculation unit is 200 steps.

  The step count control unit monitors whether or not the number of steps counted by the pedometer 109 has reached the set number of steps (S32). First, the step count of the pedometer 109 from the start of setting the number of steps has increased by 100 counts. Is detected, the step count expiration notice is sent to the first positioning timing calculation section (S34).

  When the first positioning timing calculation unit receives the notification of the expiration of the number of steps, it makes a positioning request to the GPS control unit 104 (S36), and the GPS control unit 104 executes GPS positioning in response to the positioning request (S36). ). The positioning result is stored in the memory 101 (S40), notified to the navigation control unit (S42), the map information displayed on the display unit 105 is updated, and the current position is also updated (S44). In the example of FIG. 4, the position P2 is displayed as the current position.

  After the map information is updated with the latest position information (positioning result) by the navigation control unit, the distance to the next route change point obtained by updating the map information is used as the positioning information, and the first positioning timing calculation unit Is notified (S46). Based on the positioning information notified to the first positioning timing calculation unit, the positioning timing at the next route change point is further calculated (S48). In this way, the processes of steps S24, S28, S32, S34, S36, S38, S40, S42, S44, and S46 are repeated.

  In step S36, when a positioning request is made, a predetermined melody sound (pattern A) may be sounded. The melody sound of pattern A is a melody sound that informs the user that a right turn or a left turn is necessary. Based on an instruction from the first positioning timing calculation unit, the acoustic control unit 106 causes the speaker to output melody data stored in the memory 101 in advance. Accordingly, the user can recognize that the route change point has been reached without looking at the display unit 105 in a state where the mobile terminal device is put in a pocket or a bag, for example.

  That is, the user only sees “right turn → left turn → right turn” as the route to the destination, and views the display unit 105 by turning in the stored direction every time the voice of pattern A is recognized. You can get to your destination without any problems.

  In FIG. 5, when detecting that the step count of the pedometer 109 has increased by 200 counts from the start of the step count setting, the step count control unit notifies the second positioning timing calculation unit of a step count expiration notification (S50).

  When the second positioning timing calculation unit receives the notification of the expiration of the number of steps, it makes a positioning request to the GPS control unit 104 (S52), and the GPS control unit 104 executes GPS positioning in response to the positioning request (S54). ). The positioning result is stored in the memory 101 (S56), notified to the navigation control unit (S58), the map information displayed on the display unit 105 is updated, and the current position is also updated (S60). In the example of FIG. 4, the position P3 is displayed as the current position.

  After the map information is updated with the latest position information (positioning result) by the navigation control unit, the distance to the destination updated by the update of the map information is notified to the second positioning timing calculation unit as positioning information ( S62). Based on the positioning information notified to the second positioning timing calculation unit, the positioning timing corresponding to the distance to the destination is calculated (S64). In this way, the processes of steps S26, S30, S32, S50, S52, S54, S56, S58, S60, and S62 are repeated.

  In step S52, when a positioning request is made, a predetermined melody sound (pattern B) may be sounded. The melody sound of pattern B is a melody sound that informs the user of the approximate distance to the destination. Based on an instruction from the second positioning timing calculation unit, the acoustic control unit 106 outputs the melody data (pattern B) stored in the memory 101 in advance from the speaker. As a result, the interval at which the melody of the pattern B rings is shortened, so that the user can recognize that the user is approaching the destination without looking at the display unit 105.

  In the third positioning timing determination operation described with reference to FIGS. 4 and 5, the first positioning timing calculation unit and the second positioning timing calculation unit operate independently of each other. For example, the first positioning timing operation It is also assumed that the positioning timing obtained by the above and the positioning timing obtained by the second positioning timing operation are very close. For example, the positioning timing obtained by the first positioning timing operation is 100 steps, and the positioning timing obtained by the second positioning timing operation is 110 steps. In such a case, the next positioning is performed even though only 10 steps have been moved, which is a useless positioning from the viewpoint of power saving.

  Therefore, as a modification of the third positioning timing determination operation, when the number of steps of the positioning timing by the first positioning timing calculation unit has expired, the positioning timing by the second positioning timing calculation unit that has not yet expired Try to recalculate. The positioning timing (number of steps) calculated by the second positioning timing calculation unit is the first positioning tying calculation by recounting the reset number of steps starting from the positioning timing by the first positioning timing calculation unit. Immediately after the number of steps of the positioning timing by the unit expires, positioning by the positioning timing calculated by the second positioning timing calculation unit is not performed.

  FIG. 6 is a diagram for explaining a modification of the third positioning timing determination operation. FIG. 6A is a diagram in which steps S34, S36, S38, S42, S44, S46, and S48 in FIG. 5 related to the modified example of the third positioning timing determination operation are extracted, and FIG. FIG. 7 is a flowchart showing a modification of the third positioning timing determination operation corresponding to FIG.

  That is, the navigation control unit notifies the positioning information based on the positioning timing of the first positioning timing calculation unit not only to the first positioning timing calculation unit but also to the second positioning timing calculation unit (S47), The second positioning timing calculation unit recalculates the positioning timing based on the positioning information of S47 when the number of steps at the positioning timing calculated by the first positioning timing calculation unit expires, and resets the recalculated number of steps. (S29). In the example of FIG. 4, the positioning at the positions P3 and P5 can be omitted.

  In this case, there may occur a phenomenon in which the positioning at the positioning timing obtained by the second positioning timing calculation unit is not performed until the user passes through the last route change point. Such a wrinkle allows the user to check the indication of the distance to the destination by looking at the display unit 105.

  In addition, when the number of steps of the positioning timing by the second positioning timing calculation unit has expired, the positioning timing by the first positioning timing calculation unit that has not yet completed the number of steps may be recalculated. Positioning is always performed at a point, so positioning is performed when both steps are completed, even if both steps are close. Since the first positioning timing calculation unit recalculates the positioning timing immediately before the course change point, the accuracy of the number of steps to the course change point (next positioning timing) is improved.

  FIG. 7 is a diagram for explaining a positioning pause operation. The positioning timing determination operation described above is based on the assumption that the route from the current position at the start of navigation to the destination is moved on foot. However, when the destination is far away, it is also assumed that the user travels using a transportation system such as a train or a bus. While on a train or bus, the pedometer 109 does not count the number of steps, but the user's position moves. In this case, the movement cannot be detected by the step count of the pedometer 109, and if the movement is monitored at the positioning timing (number of steps) determined before using the transportation facility, positioning is performed at an incorrect positioning timing.

  Specifically, as illustrated in FIG. 7, at position P1, the number of steps to the next route change point by the first positioning timing determination operation is 300 steps, and the number of steps to the destination by the second positioning timing determination operation is The number of steps corresponding to the distance is calculated as 200 steps, and after this is set, the user walks from the nearest subway station ("Hirose Street Station" in FIG. 7) to the next station (in FIG. 7) without walking according to the navigation route. Suppose you travel by subway to “Sendai Station”). In this case, the current position changes even though there is no change in the number of steps in the movement section using the subway, and the number of steps set before moving by the subway is incorrect for the user's position P2 after moving by the subway. There is no positioning change point from the position P2 to the destination, and the number of steps corresponding to the distance to the destination is calculated as 150 steps.

  Therefore, when it is detected that there is no change in the number of steps counted by the pedometer for a certain period of time, the monitoring of the number of steps at the set positioning timing (number of steps) is stopped so that GPS positioning is not temporarily performed. Reset the positioning timing. Thereafter, when a count-up of the number of steps is detected, GPS positioning is performed at that time, the next positioning timing is determined with reference to the determined position, and the newly obtained number of steps is reset. Detection of the presence or absence of a change in the number of steps is executed by the pedometer control unit and notified to the positioning timing calculation unit.

  FIG. 8 is a diagram for explaining the route error notification operation. As described above, in the present invention, when the route change point is reached, the melody sound (pattern A) is sounded, so that the user can display the route to the destination set by the navigation control unit displayed on the display unit 105. You can reach your destination without looking at it. However, as shown in FIG. 8, it does not always move according to the set route for various reasons such as a memory difference of right turn or left turn or a melody sound for notifying a change in traveling direction due to external noise. FIG. 8 shows an example in which the vehicle has made a straight line at the first route change point where it should turn right.

  Therefore, when the navigation control unit detects that the current position is a position different from the set route by positioning at the set positioning timing, the navigation control unit sounds a melody sound (pattern C) to notify it. Thereby, it is possible to notify the user that the route is off and prompt the user to reconfirm the map and the route displayed on the display unit 105.

  Note that the melody sound (pattern A, pattern B) at the positioning timing and the melody sound (pattern C) for notifying the route error are not limited to melody sounds but may be vibrations. Also in this case, it is preferable to vary the vibration pattern.

(Appendix 1)
In a portable terminal device that is carried by a walking user and has a navigation function for guiding a route to a destination,
A GPS control unit for positioning the current position by GPS;
A pedometer to count steps,
When positioning by the GPS is performed, the number of steps until the next positioning timing is calculated based on the distance or route from the current position measured by the GPS control unit to the destination, and the pedometer counts the number of steps. A portable terminal device comprising: a positioning timing calculation unit that monitors whether or not to perform the next positioning by the GPS control unit when the pedometer counts the number of steps.

(Appendix 2)
In Appendix 1,
The positioning timing calculation unit calculates the number of steps from the current position measured by the GPS control unit to the next route change point on the route to the destination as the number of steps until the next positioning timing. apparatus.

(Appendix 3)
In Appendix 1,
The positioning timing calculation unit calculates the number of steps to the next positioning timing so that the number of steps to the next positioning timing decreases as the distance from the current position measured by the GPS control unit to the destination decreases. Mobile terminal device characterized by the above (Appendix 4)
In Appendix 1,
The positioning timing calculation unit includes a first number of steps from the current position measured by the GPS control unit to a next route change point on the route to the destination, and the current position measured by the GPS control unit based on the destination. A mobile terminal device that calculates, as the number of steps until the next positioning timing, a second number of steps that decreases the number of steps until the next positioning timing as the distance to the terminal becomes shorter.

(Appendix 5)
In any one of supplementary notes 1 to 4,
The positioning timing calculation unit calculates a moving distance per step of a user based on a positioning result by the GPS control unit.

(Appendix 6)
In any one of supplementary notes 1 to 3,
The positioning timing calculation unit, when the pedometer counts the calculated number of steps, causes a predetermined sound output operation and a vibration operation to be executed.

(Appendix 7)
In Appendix 4,
When the pedometer counts the first number of steps, the positioning timing calculation unit executes an acoustic output operation and a vibration operation according to a first pattern, and when the pedometer counts the second number of steps, A portable terminal device that performs a sound output operation and a vibration operation by a pattern.

(Appendix 8)
In Appendix 4,
The positioning timing calculation unit stops monitoring the counting of the other number of steps by the pedometer when the pedometer counts either the first number of steps or the second number of steps. Based on the current count calculated by the GPS control unit, the next first step number and the next second step number are calculated, and the calculated first first step number or the next second step number is calculated. A portable terminal device characterized by monitoring whether or not the number of second steps is counted.

(Appendix 9)
In any one of appendices 1 to 8,
When the number of steps counted by the pedometer does not change for a certain period of time, the positioning timing calculation unit stops monitoring the number of steps counted by the pedometer and stops positioning by the GPS control unit. Mobile terminal device.

(Appendix 10)
In Appendix 9,
When the number of steps counted by the pedometer does not change for a certain period of time and a change in the number of steps occurs thereafter, the positioning timing calculation unit causes the GPS control unit to perform positioning, and the current position obtained as a result A mobile terminal device that calculates the number of steps up to the next positioning timing with reference to.

It is a figure which shows the block structural example of the portable terminal device in embodiment of this invention. It is a figure explaining the 1st positioning timing determination operation | movement of the portable terminal device of embodiment of this invention. It is a figure explaining the 2nd positioning timing determination operation | movement of the portable terminal device of embodiment of this invention. It is a figure explaining the 3rd positioning timing determination operation | movement of the portable terminal device of embodiment of this invention. It is a flowchart of a 3rd positioning timing determination operation | movement. It is a figure explaining the modification of 3rd positioning timing determination operation | movement. It is a figure explaining the pause operation of positioning. It is a figure explaining route error notification operation.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 100: Application control part, 101: Memory, 103: Application CPU, 104: GPS control part, 105: Display part, 106: Acoustic control part, 107: AIU, 108: Key, 109: Pedometer, 110: Wireless control part 111: CPU, 112: IF, 113: RF

Claims (2)

Carried by a walking user and has a navigation function to guide the route to the destination
Mobile terminal devices,
A GPS control unit for positioning the current position by GPS;
A pedometer to count steps,
When positioning by the GPS is performed, from the current position measured by the GPS control unit
Based on the distance or route to the destination, calculate the number of steps until the next positioning timing,
Monitor whether the pedometer counts the number of steps, and the pedometer counts the number of steps
And a positioning timing calculation unit for performing the next positioning by the GPS control unit,
The positioning timing calculation unit calculates the number of steps to the next positioning timing so that the number of steps to the next positioning timing decreases as the distance from the current position measured by the GPS control unit to the destination decreases. A portable terminal device. Carried by a walking user and has a navigation function to guide the route to the destination
Mobile terminal devices,
A GPS control unit for positioning the current position by GPS;
A pedometer to count steps,
When positioning by the GPS is performed, from the current position measured by the GPS control unit
Based on the distance or route to the destination, calculate the number of steps until the next positioning timing,
Monitor whether the pedometer counts the number of steps, and the pedometer counts the number of steps
And a positioning timing calculation unit for performing the next positioning by the GPS control unit,
The positioning timing calculation unit includes a first number of steps from the current position measured by the GPS control unit to a next route change point on the route to the destination, and the current position measured by the GPS control unit based on the destination. A mobile terminal device that calculates, as the number of steps until the next positioning timing, a second number of steps that decreases the number of steps until the next positioning timing as the distance to the terminal becomes shorter.