JP2010107347A - Portable terminal apparatus and positioning method of portable terminal apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a portable terminal apparatus for maintaining a positioning success rate, and reducing a power consumption. <P>SOLUTION: The portable terminal apparatus includes: a positioning mode determining section 20 for implementing a positioning mode determination based on positioning information when a positioning operation is previously attempted; and a GPS positioning section 10 for implementing the positioning operation based on a positioning mode determination result from the positioning mode determining section. A timeout time of a power control section 12 is determined in each mode by using information including a time after power is turned on, the number of captured satellites, a previous positioned location and a positioning time. A power control of a GPS receiver 11 is accurately implemented. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a portable terminal device capable of specifying a position by SPS (Satellite Positioning System) positioning such as GPS (Global Positioning System).

  In the case of navigation in a portable terminal device (hereinafter referred to as a portable terminal device) that can identify the location by GPS positioning, it is necessary to appropriately control the power supply of GPS in order to reduce power consumption.

  A conventional portable terminal device is a GPS device that measures the latitude, longitude, altitude, and the like of a user's current position based on GPS satellite information, a power supply unit that supplies power to the GPS device, and a control that controls the operation of the GPS device. And means. When the GPS device cannot track all the number of GPS satellites necessary for positioning of the current position within a predetermined time after the GPS device starts tracking the GPS satellite, the control unit cuts off the power supply from the power supply unit to the GPS device. It is known to prevent battery consumption due to unnecessary tracking of GPS satellites by performing a control operation (see, for example, Patent Document 1).

  In addition, other conventional mobile terminal devices specify the reception position, that is, whether the position is inside or outside the building, underground, or the like from the signal reception sensitivity, the number of captured satellites, and the change state thereof. Based on this, the transmission information is selectively changed (see, for example, Patent Document 2).

Another conventional portable terminal device measures a GPS satellite capturing unit that captures a GPS satellite based on a positioning signal received by the GPS receiving unit, and the number of captured GPS satellites captured by the GPS satellite capturing unit. The GPS capture number measurement unit and a GPS positioning stop determination unit that determines whether or not a GPS positioning stop condition is satisfied based on the number of captures measured by the GPS capture number measurement unit. When the GPS positioning stop determination unit determines that the GPS positioning stop condition is satisfied, the GPS positioning is stopped. When it is determined that the GPS positioning stop condition is not satisfied, the GPS positioning is continued. Thereby, the thing which can shorten the waiting time which GPS positioning requires is known (for example, refer to patent documents 3).
JP-A-6-148305 JP 2004-245657 A JP 2008-51808 A

  However, in the navigation with the conventional portable terminal device, the determination is performed for each positioning. Therefore, in spite of being in a state where positioning is not possible, it may happen that the SPS such as GPS is not turned off and power is consumed wastefully. In addition, despite the fact that positioning is possible, it may happen that the SPS such as GPS is turned off and the positioning success rate may decrease.

  In addition, since it is stationary, even when the latest positioning position can be used as it is, the timeout may be set long and power may be consumed wastefully.

  Further, the determination is made based on the reception state of the satellite, and there is a problem that the correlation with whether or not the positioning is actually possible is relatively low.

  The present invention has been made to solve such a conventional problem, and an object of the present invention is to provide a portable terminal device capable of reducing power consumption while maintaining a positioning success rate. is there.

  The portable terminal device of the present invention includes a positioning mode determination unit that performs positioning mode determination based on positioning information at the time of past positioning trials, and an SPS positioning unit that performs positioning based on the positioning mode determination result of the positioning mode determination unit. It has the composition provided.

  With this configuration, it is possible to determine the environmental situation and the movement situation using the accumulated positioning information at the past positioning trial, and to control the SPS receiver such as a GPS receiver based on the judgment result.

  In addition, the SPS positioning unit of the mobile terminal device of the present invention has a configuration for controlling the positioning timeout time based on the positioning mode determination result.

  With this configuration, it is possible to determine a positioning timeout time based on the positioning mode determination result, and to control an SPS receiver such as a GPS receiver.

  In addition, the positioning mode determination unit of the mobile terminal device of the present invention has a configuration for performing mode determination based on the number of captured satellites within the first predetermined timeout time at the time of the previous positioning attempt.

  With this configuration, it is possible to perform mode determination based on the number of captured satellites within the first predetermined timeout period at the time of the previous positioning trial, and to control an SPS receiver such as a GPS receiver based on the determination result.

  In addition, the positioning mode determination unit of the mobile terminal device of the present invention has a configuration for performing mode determination based on the time during which the number of captured satellites continues to be less than a predetermined number until the previous positioning attempt or the number of positioning attempts. is doing.

  With this configuration, the mode determination is performed based on the time during which the number of captured satellites continues to be less than the predetermined number until the positioning trial or the number of positioning trials, and the SPS receiver such as a GPS receiver is determined based on the determination result. Can be controlled.

  In addition, the positioning mode determination unit of the mobile terminal device of the present invention has a configuration for performing mode determination based on past positioning time.

  With this configuration, it is possible to control an SPS receiver such as a GPS receiver based on a determination result that performs mode determination based on past positioning times.

  In addition, the positioning mode determination unit of the mobile terminal device of the present invention has a configuration for performing mode determination based on the movement distance within the past predetermined time or the predetermined number of positioning attempts.

  With this configuration, it is possible to control an SPS receiver such as a GPS receiver based on a determination result in which mode determination is performed based on a moving distance within a past predetermined time or a predetermined number of positioning attempts.

  In addition, the positioning mode determination unit of the mobile terminal device of the present invention has a configuration that performs mode determination based on whether or not a satellite that has not been received at the time of a predetermined number of previous positioning attempts has been captured. .

  With this configuration, mode determination is performed based on whether or not a satellite that has not been received at the previous predetermined number of positioning attempts has been captured, and an SPS receiver such as a GPS receiver is controlled based on the determination result. be able to.

  In addition, the SPS positioning unit of the mobile terminal device of the present invention has a configuration for further determining the timeout time by adding the current positioning status.

  With this configuration, it is possible to control the SPS receiver such as a GPS receiver by determining the timeout time in consideration of the current positioning situation.

  In addition, the positioning mode determination unit of the mobile terminal device of the present invention performs a mode determination of any one of the OUTDOOR mode, the INDOR1 mode, and the INDOROR2 mode, and the SPS positioning unit performs a second predetermined timeout in the OUTDOOR mode. Positioning is performed within the time, positioning is performed within the first predetermined timeout time in the case of the INDOROR1 mode, and positioning is not performed in the case of the INDOROR2 mode.

  With this configuration, it is possible to determine whether to set an appropriate time-out time or whether to perform positioning according to the environment where the mobile terminal device is placed.

  Moreover, the portable terminal device of the present invention has a configuration in which positioning is performed in the OUTDOOR mode at the time of initial positioning. With this configuration, the mode can be determined quickly at the first positioning.

  In addition, the positioning mode determination unit of the mobile terminal device of the present invention performs any mode determination among the OPENSKY mode, the STATIC mode, the MOVING mode, and the CLOSED mode, and the SPS positioning unit performs the third operation in the OPENSKY mode. Positioning is performed within a predetermined timeout period, positioning is performed within the fourth predetermined timeout period in the case of the STATIC mode, positioning is performed within the fifth predetermined timeout period in the case of the MOVING mode, and the positioning is performed in the fifth period in the case of the CLOSED mode. The positioning is performed within a predetermined timeout period.

  With this configuration, an appropriate timeout time can be set according to the environment where the mobile terminal device is placed.

  Moreover, the portable terminal device of the present invention has a configuration in which positioning is performed in the OPENSKY mode at the time of initial positioning. With this configuration, the mode can be determined quickly at the first positioning.

  Moreover, the portable terminal device of the present invention includes a movement detection sensor, and has a configuration in which movement is detected by the movement detection sensor. With this configuration, the movement of the portable terminal device can be detected without using the SPS positioning result such as the GPS positioning result.

  In addition, the portable terminal device of the present invention has a configuration in which the position is calculated by inertial navigation using a movement detection sensor and the absolute position is periodically corrected using an SPS positioning unit.

  With this configuration, by correcting the absolute position intermittently using the SPS positioning unit, the power consumption can be reduced while improving the accuracy of the position measurement.

  Furthermore, the portable terminal device of the present invention has a configuration including a step of performing positioning mode determination based on positioning information at the time of past positioning trials, and a step of performing positioning based on a positioning mode determination result of positioning mode determination. Have.

  With this configuration, it is possible to determine the environmental situation and the movement situation using the accumulated positioning information at the past positioning trial, and to control the SPS receiver such as a GPS receiver based on the judgment result.

  The portable terminal device of the present invention includes a positioning mode determination unit that performs positioning mode determination based on positioning information at the time of past positioning trials, and an SPS positioning unit that performs positioning based on the positioning mode determination result of the positioning mode determination unit. By having the configuration provided, an appropriate positioning mode can be selected according to the environment, so that low power consumption can be achieved while maintaining the positioning success rate.

  Hereinafter, a portable terminal device according to an embodiment of the present invention will be described with reference to the drawings.

(Embodiment 1)
FIG. 1 is a block diagram showing the configuration of the mobile terminal device according to the first embodiment of the present invention.

  In FIG. 1, the mobile terminal device 100 according to the present embodiment is based on a positioning mode determination unit 20 that performs positioning mode determination based on positioning information at a past positioning trial, and a positioning mode determination result of the positioning mode determination unit 20. The GPS positioning unit 10 is an SPS positioning unit that performs positioning.

  The GPS positioning unit 10 that is an SPS positioning unit includes a GPS receiver 11 that is an SPS receiver, a power supply control unit 12, a power-on control timer 13, a power-off control timer 14, and a timeout time determination unit 15. It is the structure which has.

  The GPS receiver 11 that is an SPS receiver measures the latitude, longitude, altitude, and the like of a place where the mobile terminal device 100 is located based on the information of the GPS satellite that is the SPS satellite. The power control unit 12 supplies power to a GPS device that is an SPS device including the GPS receiver 11. The power-on control timer 13 sets a time from power-off to power-on. The power-off control timer 14 sets a time from power-on to power-off. The time-out time determination unit 15 determines the time-out time until the power is turned off based on the determination result of the positioning mode determination unit 20, and immediately after the GPS receiver 11 successfully calculates the position, the power supply from the power control unit 12 Stop supplying.

  The positioning mode determination unit 20 includes a positioning information storage unit 21, an environment determination unit 22, and a movement status determination unit 23. The positioning information storage unit 21 stores positioning information obtained by the GPS receiver 11. The environment determination unit 22 determines the environment in which the mobile terminal device 100 exists based on the positioning information stored in the positioning information storage unit 21. The movement status determination unit 23 determines the movement status of the mobile terminal device 100 based on the positioning information stored in the positioning information storage unit 21.

  The operation of the mobile terminal device 100 configured as described above will be described. First, as a premise, the GPS positioning unit 10 which is an SPS positioning unit in the mobile terminal device 100 performs GPS positioning periodically or intermittently. Here, the mobile terminal device 100 calculates the position by autonomous navigation using various sensors such as azimuth, acceleration, and angular velocity in order to reduce power consumption, and periodically corrects the absolute position by GPS. May be.

  In such a portable terminal device 100, the positioning mode determination unit 20 performs positioning mode determination based on positioning information at the time of past positioning trials. Then, based on the positioning mode determination result of the positioning mode determination unit 20, the GPS positioning unit 10 which is an SPS positioning unit performs the next positioning. In the first positioning, for example, positioning is performed in OUTDOOR mode.

  Next, a more specific operation in the mobile terminal device 100 will be described. First, positioning information such as a positioning position, a positioning time, and a captured satellite obtained by the GPS receiver 11 is stored in the positioning information storage unit 21.

  Next, the environment determination unit 22 determines the environment where the mobile terminal device 100 exists based on the positioning information stored in the positioning information storage unit 21, and sends the determination result to the timeout time determination unit 15 of the GPS positioning unit 10.

  Further, the movement status determination unit 23 determines the movement status of the mobile terminal device 100 based on the positioning information stored in the positioning information storage unit 21, and sends the determination result to the timeout time determination unit 15 of the GPS positioning unit 10.

  Next, the time-out time determination unit 15 includes GPS information such as the current time from power-on, the number of captured satellites, and the signal level obtained by the GPS receiver 11, the environment determination unit 22, and the movement status determination unit 23. Based on the sent determination result, the time-out time until the power of the GPS receiver 11 is shut off is determined and sent to the power control unit 12.

  And the power supply control part 12 interrupts | blocks the power supply of the GPS receiver 11 after the determined timeout time passes, and complete | finishes operation | movement.

  Transition between modes representing the environmental state in which the mobile terminal device according to the first embodiment of the present invention configured as described above will be described with reference to FIGS. 2 and 3.

  FIG. 2 is a diagram illustrating an example of the relationship between the mode representing the environmental state where the mobile terminal device is located and the timeout time.

  In FIG. 2, there are three modes representing the environmental state in which the mobile terminal device 100 is located: OUTDOOR mode, INDOROR1 mode, and INDOROR2 mode.

  The OUTDOOR mode is within the GPS range and the timeout time is set to 30 seconds. However, if the satellite cannot be acquired within 5 seconds of positioning start, positioning is interrupted.

  The INDOROR1 mode is out of the GPS range, and the timeout time is set to 5 seconds. However, when 3 satellites or more are captured within 5 seconds from the start of positioning, the timeout time is extended to 30 seconds.

  The INDOROR2 mode is out of the GPS range and no time-out time is set and positioning is not performed.

  FIG. 3 is a state transition diagram showing a method for determining transition between modes representing the environmental state where the mobile terminal device 100 is located.

  In FIG. 3, the state when the portable terminal device is turned on is set to the OUTDOOR mode with a high positioning success rate. That is, at the time of the first positioning, positioning is performed in the OUTDOOR mode. In the OUTDOOR mode, the timeout time is set to 30 seconds. When one or more satellites can be acquired within 5 seconds, the OUTDOOR mode 310 remains.

  On the other hand, when the state is OUTDOOR mode 310 and no satellite has been acquired within the timeout period of 5 seconds, the mode transitions to INDOROR1 mode 320 at the next positioning attempt (311).

  In the INDOOR1 mode 320, it is determined that the GPS is out of the GPS range, and the timeout time is set to 5 seconds. When the status is INDOROR1 mode 320 and at least one satellite can be acquired within 5 seconds, it remains in INDOROR1 mode 320 at the next positioning attempt.

  On the other hand, in the INDOROR1 mode 320, when three satellites can be acquired within the timeout period of 5 seconds, the mode shifts to the OUTDOOR mode 310 at the next positioning attempt (321).

  Further, in the INDOROR1 mode 320, when one satellite cannot be acquired within the time-out time of 5 seconds, the transition to the INDOROR2 mode 330 is made at the next positioning attempt (322). When the state is the INDOR2 mode 330, positioning is not performed.

  In the INDOROR2 mode 330, 15 minutes after entering the INDOROR2 mode 330, or when two positioning trials have passed, the transition to the INDOROR1 mode 320 is made once at the next positioning trial (331).

  In the first embodiment described above, the timeout time in the OUTDOOR mode 310 is 30 seconds and the timeout time in the INDOR1 mode 320 is 5 seconds. However, the present invention is not limited to this, and the timeout time is arbitrarily set. It can be set.

  Further, the acquisition time and the number of acquisition satellites, which are transition conditions between the three modes of the OUTDOOR mode, the INDOROR1 mode, and the INDOROR2 mode, can be arbitrarily set without being limited to the numerical values described in the first embodiment.

  Further, the escape condition from INDOROR2 has been described as 15 minutes or after 2 times, but the present invention is not limited to this, and the time or number of times can be set arbitrarily.

  In the first embodiment, the first positioning when power is supplied to the mobile terminal device has been described as being performed in the OUTDOOR mode with a high positioning success rate. However, the state at the time of the previous power-off is stored in advance. You may start from that mode.

  As described above, according to the mobile terminal device of the first embodiment, not only GPS information such as the current time from power-on, the number of captured satellites, and the signal level, but also the past positioning position, positioning time, captured satellite, etc. By determining the time-out time of the power supply control unit using GPS information and performing power supply control with high accuracy, the accuracy of positioning mode determination can be improved, and the power consumption can be reduced while maintaining the positioning success rate.

(Embodiment 2)
The block diagram showing the configuration of the mobile terminal device in the second embodiment of the present invention is the same as the block diagram showing the configuration of the mobile terminal device in the first embodiment.

  Also in Embodiment 2 of the present invention, as a premise, the GPS positioning unit 10 that is an SPS positioning unit in the mobile terminal device 100 performs GPS positioning periodically or intermittently. Here, the mobile terminal device 100 calculates the position by autonomous navigation using various sensors such as azimuth, acceleration, and angular velocity in order to reduce power consumption, and periodically corrects the absolute position by GPS. May be.

  Moreover, the positioning mode determination part 20 performs positioning mode determination based on the positioning information at the time of the past positioning trial. Then, based on the positioning mode determination result of the positioning mode determination unit 20, the GPS positioning unit 10 which is an SPS positioning unit performs the next positioning.

  FIG. 4 is a diagram illustrating a relationship example between a mode representing an environmental state where the mobile terminal device is located and a timeout time.

  In FIG. 4, there are four modes representing an environmental state where the mobile terminal device 100 is located: an OPENSKY mode, a STATIC mode, a MOVING mode, and a CLOSED mode.

  In the OPENSKY mode, the time-out period is set to 30 seconds in a very good condition with the sky open.

  In the STATIC mode, positioning is not always necessary when the vehicle is stationary at the indoor window, etc., so the timeout time is set short, and the timeout time is set to 10 seconds. If a satellite that has not been received in the past two positionings is captured within 5 seconds after the start of positioning, the timeout time is extended to 30 seconds.

  In MOVING mode, the timeout time is set longer than STATIC mode in order to improve the positioning success rate while moving, and the timeout time is set to 30 seconds. If it cannot be captured, the timeout time is shortened to 5 seconds.

  In the CLOSED mode, the time-out time is set to 3 seconds when no radio waves can be received, but the time-out time is extended to 30 seconds if one or more satellites can be captured within 3 seconds of the start of positioning.

  As described above, the timeout time is not uniquely determined according to the environmental state, but is determined in consideration of the latest information at that time.

  Next, a determination operation of a mode representing an environmental state in the mobile terminal device 100 will be described. As described above, the positioning mode determination unit 20 performs the positioning mode determination based on the positioning information at the past positioning trial. Then, based on the positioning mode determination result of the positioning mode determination unit 20, the GPS positioning unit 10 which is an SPS positioning unit performs the next positioning. In the first positioning, for example, positioning is performed in the OPENSKY mode.

  Next, a more specific mode determination operation in the mobile terminal device 100 will be described. FIG. 5 is a flowchart showing a mode determination operation representing the environmental state where the mobile terminal device is located in the second embodiment of the present invention.

  In FIG. 5, first, a positioning trial is started in the mobile terminal device 100, and it is determined whether at least three satellites have been captured within 5 seconds with a positioning time of less than 10 seconds (S501).

  Here, when at least 3 satellites can be acquired within 5 seconds with a positioning time of less than 10 seconds during the previous positioning attempt (YES in S501), it is determined that the positioning mode of the mobile terminal device 100 is in the OPENSKY mode (S502). Set the timeout time to 30 seconds.

  On the other hand, if at least 3 satellites could not be captured within 5 seconds with a positioning time of less than 10 seconds during the previous positioning trial (NO in S501), whether or not one satellite could be captured in the past three times before the previous positioning. Determination is made (S503).

  Here, when one satellite cannot be captured three times in succession (YES in S503), it is determined that the positioning mode of the mobile terminal device 100 is in the CLOSED mode (S504), and the timeout time is set to 3 seconds. . However, if one or more satellites can be acquired within 3 seconds, the timeout time is set to 30 seconds.

  On the other hand, if one or more satellites have been captured in any of the past three positioning attempts until the previous positioning (NO in S503), the position based on the current positioning result and the position based on the positioning result 10 minutes ago are 500 meters or more. It is determined whether they are separated (S505).

  Here, when the position based on the previous positioning result and the position based on the positioning result 10 minutes ago are more than 500 meters away (YES in S505), it is determined that the positioning mode of the mobile terminal device 100 is the MOVING mode. (S506), the timeout time is set to 30 seconds. However, if one satellite cannot be acquired within 5 seconds, the timeout time is set to 5 seconds.

  On the other hand, when the position based on the previous positioning result and the position based on the positioning result 10 minutes before are not more than 500 meters apart (NO in S505), the satellite that has not been captured in the past two positionings is captured. It is determined whether or not (S507).

  When a satellite that has not been acquired in the past two positionings at the previous positioning trial is acquired (YES in S507), it is determined that the positioning mode of the mobile terminal device 100 is the MOVING mode (S506), and a timeout occurs. Set the time to 5 seconds. However, if one or more satellites can be acquired within 5 seconds, the timeout time is set to 30 seconds.

  On the other hand, when a satellite that has not been captured in the past two positionings in the previous positioning trial could not be captured (NO in S507), it is determined that the positioning mode of the mobile terminal device 100 is the STATIC mode ( S508), the timeout time is set to 10 seconds. However, if one satellite cannot be acquired within 5 seconds, the timeout time is set to 5 seconds. When a satellite that has not been acquired in the past two positionings is acquired, the timeout time is set to 30 seconds.

  In the second embodiment of the present invention, the movement of the mobile terminal device is determined by positioning using GPS. However, when another movement detection sensor is mounted, the movement is determined by the sensor. good. Alternatively, inertial navigation may be performed using a sensor, and the position calculated by inertial navigation may be corrected periodically using positioning information using GPS.

  FIG. 6 is a state transition diagram showing a method for determining transition between modes.

  In FIG. 6, when the environmental state located at the time of the previous positioning is the OPENSKY mode 610, the past three positioning times up to the previous time are three consecutive times and the positioning time is 5 seconds or more. When the position based on the positioning result of minutes ago is less than 500 meters, it is determined that the environmental state in which the mobile terminal device 100 is located is the STATIC mode 620 (611).

  If the last three positioning times up to the previous time are three consecutive times and the positioning time is 5 seconds or more, and the position based on the current positioning result and the position based on the positioning result 10 minutes ago is 500 meters or longer, It is determined that the environmental state in which the apparatus 100 is located is the MOVING mode 630 (612).

  If one satellite cannot be captured for the last three consecutive times up to the previous time, it is determined that the environmental state in which the mobile terminal device 100 is located is the CLOSED mode 640 (613).

  Next, when the environmental state located at the time of the previous positioning is the STATIC mode 620, when the positioning time is less than 10 seconds and 3 satellites are captured within 5 seconds, the environmental state where the mobile terminal device 100 is located is the OPENSKY mode. It is determined that it is 610 (621).

  In addition, when the position based on the current positioning result and the position based on the positioning result 10 minutes ago are 500 meters or more or when a satellite that has not been captured so far in the past two times has been captured, the position of the mobile terminal device 100 It is determined that the environmental state to be performed is the MOVING mode 630 (622).

  If one satellite cannot be captured for the last three consecutive times up to the previous time, it is determined that the environmental state in which the mobile terminal device 100 is located is the CLOSED mode 640 (623).

  Next, when the environmental state located at the time of the previous positioning is the MOVING mode 630, when the positioning time is within 10 seconds and the three satellites are captured within 5 seconds, the environmental state where the mobile terminal device 100 is located is OPENSKY. It is determined that the mode is 610 (631).

  In addition, when the position based on the current positioning result and the position based on the positioning result 10 minutes ago are less than 500 meters or only the satellites captured so far in the past two times are captured, the environment in which the mobile terminal device 100 is located The state is determined to be the STATIC mode 620 (632).

  If one satellite cannot be captured in the past three times until the previous time, it is determined that the environmental state in which the mobile terminal device 100 is located is the CLOSED mode 640 (633).

  Next, when the environmental state that was located at the time of the previous positioning is the CLOSED mode 640, when the positioning time is less than 10 seconds and 3 satellites are captured within 5 seconds, the environmental state where the mobile terminal device 100 is located is the OPENSKY mode. It is determined that it is 610 (641).

  If the position based on the current positioning result and the position based on the positioning result 10 minutes ago are less than 500 meters, it is determined that the environmental state in which the mobile terminal device 100 is located is the STATIC mode 620 (642).

  If the position based on the current positioning result and the position based on the positioning result 10 minutes ago are 500 meters or more, it is determined that the environmental state in which the mobile terminal device 100 is located is the MOVING mode 630 (643).

  In the second embodiment, in order to improve the accuracy of positioning mode determination and reduce power consumption, the timeout time in the OPENSKY mode is set to 30 seconds, the timeout time in the STATIC mode is set to 10 seconds, and the timeout time in the MOVING mode is set to 30 seconds. In the above description, the timeout time in the CLOSED mode is 3 seconds. However, the present invention is not limited to this, and the timeout time may be changed, or the same timeout time may be set for a specific mode. A variable timeout time may be used.

  Moreover, although the moving distance from the positioning position 10 minutes ago to the current positioning position has been described as 500 meters, the present invention is not limited to this, and the past required time and the moving distance may be changed.

  Furthermore, the numerical values of the transition conditions between the modes such as the number of continuous measurements for capturing the satellite and the number of capturing the satellite can be arbitrarily set without being limited to the numerical values described in the second embodiment.

  In addition, the first positioning when power is supplied to the mobile terminal device may be performed in the OPENKY mode with a high positioning success rate, or the state at the time of the previous power-off is stored, and from that mode You may start.

  As described above, the mobile terminal device according to the second embodiment has the positioning time equal to or less than the specified value, or the number of times that the positioning is continued, the number of captured satellites in the specified time, the number of positioning attempts, the distance between the previous and current positioning positions, Since mode determination is performed based on information such as whether or not a satellite different from the previous one has been received, the accuracy of positioning mode determination is improved, and low power consumption can be achieved while maintaining the positioning success rate.

  As described above, the mobile terminal device according to the present invention has an effect that it is possible to reduce power consumption while maintaining a positioning success rate, and is useful as a mobile phone, a PDA, and the like.

The block diagram which shows the structure of the portable terminal device in Embodiment 1 of this invention. The figure which shows the example of a relationship between the mode of the portable terminal device in Embodiment 1 of this invention, and timeout time. State transition diagram showing transition between modes of the mobile terminal device in the first embodiment of the present invention The figure which shows the example of a relationship between the mode of the portable terminal device and timeout time in Embodiment 2 of this invention. The flowchart which shows the mode determination operation | movement of the portable terminal device in Embodiment 2 of this invention. State transition diagram showing transition between modes of the mobile terminal device in the second embodiment of the present invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 GPS positioning part 11 GPS receiver 12 Power supply control part 13 Power-on control timer 14 Power-off control timer 15 Timeout time determination part 20 Measurement mode determination part 21 Positioning information storage part 22 Environment determination part 23 Movement condition determination part 100 Mobile Terminal device

Claims (15)

A positioning mode determination unit that performs positioning mode determination based on positioning information at the time of past positioning trials;
An SPS positioning unit that performs positioning based on the positioning mode determination result of the positioning mode determination unit;
A portable terminal device comprising: The mobile terminal device according to claim 1, wherein the SPS positioning unit controls a timeout time for positioning based on a positioning mode determination result. The portable terminal device according to claim 1 or 2, wherein the positioning mode determination unit performs mode determination based on the number of captured satellites within a first predetermined timeout period at the time of a previous positioning attempt. 2. The positioning mode determination unit according to claim 1, wherein the positioning mode determination unit performs mode determination based on a time during which the number of captured satellites continues to be less than a predetermined number until a previous positioning attempt or a number of positioning attempts. 2. The mobile terminal device according to 2. The mobile terminal device according to claim 1, wherein the positioning mode determination unit performs mode determination based on past positioning time. The mobile terminal device according to claim 1 or 2, wherein the positioning mode determination unit performs mode determination based on a movement distance within a predetermined past time or a predetermined number of positioning attempts. 3. The mode determination unit according to claim 1, wherein the positioning mode determination unit performs mode determination based on whether or not a satellite that has not been received at a predetermined number of previous positioning attempts has been captured. Mobile terminal device. The mobile terminal device according to claim 2, wherein the SPS positioning unit further determines a timeout time by adding a current positioning situation. The positioning mode determination unit
Make any mode decision among OUTDOOR mode, INDOROR1 mode and INDOROR2 mode,
The SPS positioning unit is
In the OUTDOOR mode, positioning is performed within the second predetermined timeout period,
In the INDOROR1 mode, positioning is performed within the first predetermined timeout period,
The portable terminal device according to any one of claims 1 to 8, wherein positioning is not performed in the INDOROR2 mode. The portable terminal device according to claim 9, wherein positioning is performed in OUTDOOR mode during the first positioning. The positioning mode determination unit
OPENSKY mode, STATIC mode, MOVING mode, and CLOSED mode mode determination,
The SPS positioning unit is
In the case of the OPENSKY mode, positioning is performed within the third predetermined timeout period,
In the case of the STATIC mode, positioning is performed within the fourth predetermined timeout time,
In the MOVING mode, positioning is performed within the fifth predetermined timeout period,
9. The portable terminal device according to claim 1, wherein in the CLOSED mode, positioning is performed within a sixth predetermined timeout period. 12. The portable terminal device according to claim 11, wherein the positioning is performed in the OPENSKY mode at the first positioning. Equipped with a movement detection sensor
The portable terminal device according to claim 1, wherein movement is detected by the movement detection sensor. The mobile terminal device according to claim 13, wherein the position is calculated by inertial navigation using the movement detection sensor, and the absolute position is corrected periodically using the SPS positioning unit. Performing positioning mode determination based on positioning information at the time of past positioning trials;
Performing positioning based on the positioning mode determination result of the positioning mode determination;
A positioning method for a mobile terminal device, comprising:

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