JP2006017735A - Mobile information terminal having position measuring system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mobile information terminal having a position measuring system capable of selecting a measuring part in response to a load of a CPU, capable of dispersing and reducing the CPU load, and capable of selecting the measuring part with measuring precision required in response to a scene. <P>SOLUTION: A GPS measuring part 20 includes a first measuring part 21 and a second measuring part 22. The first measuring part 21 receives highly precise positioning information from a semi-zenith satellite, and conducts positioning by a measuring system with precision higher than that of the second measuring part 22, based on the highly precise positioning information. The second measuring part 22 conducts an independent position measurement. A switching part 24 conducts selectively switching between the two positioning parts. The switching part 24 switches the measuring parts according to a determination signal output from a determination part 30. A determination condition setting part 33 sets a determination condition to be output as a determination condition signal to a selection determination part 34. The selection determination part 34 determines the measuring part to be selected, based on the input determination condition signal, a determination object signal 81 input from a vehicle speed detecting part 90 or the like, and the like. The selection determination part 34 outputs a determination result as a determination signal to the switching part 24. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a mobile information terminal. The present invention also relates to a mobile information terminal having a positioning device. For example, the present invention relates to a GPS (Global Positioning System) device.

  Conventional car navigation systems use a combination of GPS code positioning with a precision of several meters and a map matching function, or high-precision positioning such as DGPS (Differential Global Positioning System) with an accuracy of 1 m or less. ing. In this conventional car navigation apparatus, any one of the methods is employed, and for example, there is no one that switches between the plurality of positioning methods.

  On the other hand, a CPU (Central Processing Unit) incorporated in the car navigation apparatus executes, for example, image processing in parallel processing in addition to processing related to GPS positioning. When performing parallel processing, if high-precision positioning is used in GPS positioning, the load on the CPU increases and causes parallel processing operations such as image processing to be delayed. Therefore, there is a case where it is desired to switch the positioning accuracy of GPS positioning in order to reduce the load on the CPU.

  For example, when a car is traveling on a highway at 100 km / h, the user of the car navigation apparatus does not need to have positioning accuracy of about several tens of centimeters in positioning every second. In such a case, positioning accuracy may be lowered. Conversely, when the vehicle is close to the destination or when traveling in an unfamiliar and unfamiliar area at low speed, the user seeks high positioning accuracy. Because of this, the need for positioning accuracy varies depending on the scene. Therefore, there are cases where it is desired to switch the positioning accuracy according to the scene.

  In the conventional technique, a technique for positioning the current position by detecting transmission identification information from a DAB (Digital Audio Broadcasting) signal instead of the GPS positioning performed by receiving radio waves from a GPS satellite is disclosed. (For example, refer to Patent Document 1). Further, in the conventional technique, as one technique for changing the GPS positioning mode, a technique for changing the time interval of the GPS positioning operation is also disclosed (for example, Patent Document 2).

However, none of the above prior arts (Patent Document 1 and Patent Document 2) disclose a technique for switching the positioning accuracy of the GPS positioning unit.
Japanese Patent Laid-Open No. 11-271076 Japanese Patent Laid-Open No. 10-206520

  An object of the present invention is to select a positioning unit according to the load on the CPU and to distribute and reduce the CPU load. It is another object of the present invention to provide a position positioning device that selectively switches to a positioning unit having a required positioning accuracy according to the scene. Furthermore, an object of the present invention is to provide a position positioning device that performs switching determination when switching positioning units.

A mobile information terminal having a position positioning device of the present invention is a mobile information terminal having a position positioning device for positioning a position.
The positioning device is
At least two positioning units for receiving positioning information and positioning the position;
A determination condition setting unit configured to set a determination condition used for determining which of the at least two positioning units to select and perform positioning, and to output as a determination condition signal;
A selection condition signal output from the determination condition setting unit is input, a determination is made as to which of the at least two positioning units is selected based on the input determination condition signal, and a determination result is output as a determination signal A determination unit;
And a switching unit that inputs the determination signal output from the selection determination unit and selectively switches the positioning by the at least two positioning units based on the input determination signal.

  According to the present invention, the load on the CPU can be reduced.

  According to the present invention, it is possible to provide positioning accuracy required for a scene according to the scene.

  According to the present invention, conditions can be set in detail in the determination for selecting a positioning unit, and various determinations can be made.

Embodiment 1 FIG.
A mobile information terminal according to Embodiment 1 having a configuration for switching a positioning unit will be described with reference to FIGS. 1 to 8. FIG. 1 shows a system in which the mobile information terminal of the first embodiment is used. FIG. 1 is a diagram illustrating a state in which a mobile information terminal equipped in an automobile 10 (an example of a mobile object) receives positioning information from a satellite group and measures a position. Normally, GPS positioning is performed by receiving positioning information from four satellites. In the system according to the first embodiment, at least one of the four satellites is the quasi-zenith satellite 200.
The quasi-zenith satellite will be described in detail later.
The mobile information terminal receives the positioning information transmitted by the quasi-zenith satellite 200 and the GPS satellite 300 (referred to as a satellite other than the quasi-zenith satellite 200) by the antenna 26. Further, the positioning information distribution center 400 transmits positioning correction information collected from an electronic reference point network described later to the quasi-zenith satellite 200.

The quasi-zenith satellite 200 refers to a satellite having a higher elevation angle than that of a normal satellite. For example, the elevation angle can ensure 60 degrees or more. In the system of the first embodiment, at least one of the four satellites necessary for GPS positioning is the quasi-zenith satellite 200.
Next, the quasi-zenith satellite 200 will be described with reference to FIGS.

  FIG. 2 shows the orbit of the quasi-zenith satellite 200. The quasi-zenith satellite 200 has an inclination angle of about 45 degrees from the equatorial plane and an orbit with an eccentricity of about 0.099, for example, about 40,000 km at a far point and about 32,000 km at a near point, for example. To make one lap per day. In addition, three quasi-zenith satellites 200 are arranged so as to be separated by 120 degrees at the ascending intersection eclipse (intersection with the equator plane).

  FIG. 3 shows the locus of the quasi-zenith satellite 200 in FIG. 2 when the ground is fixed. As shown in FIG. 3, the quasi-zenith satellite 200 orbits so as to draw an “eighth-shape”. The three quasi-zenith satellites 200 are located above Japan without a break so that the orbital planes are different but change every 8 hours. When the region is considered in Japan, the quasi-zenith satellite 200 having an elevation angle of 60 degrees or more is always present above Japan. Because it is located in the sky above Japan, there is always a quasi-zenith satellite 200 with an elevation angle of 60 degrees or more. It is never done.

  FIG. 4 (source: www2.crl.go.jp/ka/control/efsat/index-J.html) is a diagram showing that the quasi-zenith satellite 200 has a high elevation angle in comparison with a geostationary satellite. Because geostationary satellites have a small elevation angle, radio waves are blocked by buildings. In contrast, the quasi-zenith satellite 200 has a high elevation angle of 60 degrees or more (in FIG. 4, it is 60 degrees or more, but 70 degrees or more is possible), so that radio waves are hardly blocked even in valleys of buildings.

GPS positioning can be performed by receiving positioning information from any four of the currently launched GPS satellites. However, since these GPS satellites have low elevation angles, the positioning information from these satellites is blocked by the valleys of the building as described above, and the probability that the positioning information of all four aircraft can be received is not high. Therefore, there are many cases where positioning information cannot be received from the four aircrafts and positioning cannot be performed. However, among the four satellites necessary for positioning, there is one high-elevation quasi-zenith satellite 200, so that the probability that positioning information can be received from the four satellites increases. In addition, as described above, since at least one quasi-zenith satellite 200 always exists over Japan, the probability that positioning information can be received from four satellites including the quasi-zenith satellite 200 is significantly increased.
As described above, the quasi-zenith satellite 200 has a high elevation angle, and one of the three quasi-zenith satellites 200 is present above Japan, thereby increasing the reliability of GPS positioning.

FIG. 5 is a diagram showing a high-precision positioning system using the quasi-zenith satellite 200. The high-accuracy positioning system using the quasi-zenith satellite 200 shown in FIG. 5 enables positioning within an error range where the positioning accuracy is several tens of centimeters to several centimeters.
The GPS satellite 300 broadcasts positioning information. The quasi-zenith satellite 200 and the MTSAT 450, which is an example of a geostationary satellite, are also GPS complementary satellites, and broadcast high-precision positioning information including, for example, differential positioning correction data and integrity data as positioning information. Here, MTSAT 450 is used, but it is used as an example of a geostationary satellite, and may be another geostationary satellite. A user receives positioning information from four satellites using a mobile information terminal. As a combination of satellites, for example, one quasi-zenith satellite 200 and three GPS satellites 300, one quasi-zenith satellite 200 and three geostationary satellites, or one quasi-zenith satellite 200 and GPS satellite 300 And a combination of three satellites based on MTSAT450. In this way, position information necessary for positioning can be obtained by a group of four satellites including at least the quasi-zenith satellite 200. Further, the position information necessary for positioning may be obtained by a satellite group not limited to four.

On the ground, a positioning information distribution center 400 and electronic reference points arranged throughout the country are arranged. The electronic reference point has its own reference position as a fixed point. The electronic reference points arranged in the whole country cover the whole country with an electronic reference point network, for example, with a range surrounded by a plurality of adjacent electronic reference points as one mesh. Electronic reference points arranged nationwide obtain position information necessary for positioning by the above four or more satellite groups. Then, positioning correction information such as an error between the reference position owned by itself and the position based on the position information obtained by the four or more satellite groups is output to the positioning information distribution center 400. Here, since the whole country is covered with the electronic reference point network, the correction accuracy can be improved even at a certain position in the mesh. The positioning information distribution center 400 inputs positioning correction information from electronic reference points arranged in the whole country, collects and integrates the input positioning correction information, creates collected integrated information, and quasi-zeniths via a predetermined antenna Transmit to a satellite such as satellite 200. The quasi-zenith satellite 200 or the like broadcasts high-accuracy positioning information based on the collected integrated information transmitted from the positioning information distribution center 400 to a satellite such as the quasi-zenith satellite 200 via a predetermined antenna.
By using at least the quasi-zenith satellite 200 that has a low elevation and a low elevation angle, the user avoids shielding due to being located in a mountain shadow or an obstacle such as a building as much as possible, and positioning is possible by avoiding shielding. Can be improved. In addition, the user corrects high-accuracy positioning information corrected by a system having a group of four or more satellites including at least the quasi-zenith satellite 200, a positioning information distribution center 400 arranged on the ground, and an electronic reference point arranged nationwide. By obtaining this, it is possible to obtain highly accurate position information. In this way, the user obtains position information with high accuracy by using the quasi-zenith satellite 200, for example, position information with an error range of several tens of centimeters to several centimeters in an urban building town or a mountainous area. be able to.

As described above, high-precision positioning is possible by using the system of the quasi-zenith satellite 200 and the electronic reference point network.
6 to 8 show a mobile information terminal according to the first embodiment configured to switch between high-accuracy positioning using the quasi-zenith satellite 200 and normal-accuracy positioning.
Here, “normal positioning” includes, for example, GPS single positioning, which is inferior to the positioning using the quasi-zenith satellite 200 and the electronic reference point network. Although the GPS single positioning is inferior in accuracy, the burden of the CPU processing in the position calculation is reduced instead, and the load on the CPU is lighter than the high accuracy positioning using the positioning information of the quasi-zenith satellite 200.

FIG. 6 is a diagram showing the configuration of the mobile information terminal according to Embodiment 1. A GPS device 100 (an example of a positioning device) and the multimedia device 50 are connected to the CPU 70 via a bus 80. Here, the multimedia device 50 is a device that handles moving images, sounds, characters, and the like, and the processing is mainly performed by the CPU 70. A navigation unit 60, a vehicle speed detection unit 90, and a CPU load sensor 71 are connected to the GPS device 100.
The GPS device 100 includes a GPS positioning unit 20, a determination unit 30, and a charging unit 40.
The GPS positioning unit 20 includes a first positioning unit 21, a second positioning unit 22, a satellite receiving unit 23, a switching unit 24, and a positioning time monitor unit 25. The first positioning unit 21 performs positioning with higher accuracy than the second positioning unit 22. For example, the first positioning unit 21 performs high-precision positioning using the quasi-zenith satellite 200 and the electronic reference point network system. The second positioning unit 22 performs positioning with lower accuracy than the first positioning unit 21. For example, GPS single positioning is performed. The first positioning unit 21 only needs to be more accurate than the second positioning unit 22, and is not limited to the combination of high-accuracy positioning by the quasi-zenith satellite 200 and GPS single positioning.
The determination unit 30 includes a determination condition input unit 31, a determination condition storage unit 32, a determination condition setting unit 33, and a selection determination unit 34.
The charging unit 40 includes a charging processing unit 41, a charging information storage unit 42, and a charging information transmission unit 43.
Further, the navigation unit 60 includes a message display unit 61 and a map information storage unit 62.

  In the mobile information terminal of Embodiment 1, the determination unit 30 determines which one of the first positioning unit 21 and the second positioning unit 22 is selected for positioning. Then, the determination unit 30 outputs the determination result as a determination signal to the GPS positioning unit 20 via the bus 80, and the switching unit 24 inputs the determination signal. The switching unit 24 switches to one of the first positioning unit 21 and the second positioning unit 22 according to the input determination signal. The switched positioning unit inputs the positioning information from the satellite receiving unit 23, performs positioning, and outputs the positioning result to the navigation unit 60. The navigation unit 60 uses the positioning result for navigation. Hereinafter, a description will be given with reference to FIG.

  FIG. 7 is a diagram for explaining the flow from the determination until the positioning is performed by selectively switching the positioning unit according to the determination result.

  In S110, the navigation unit 60 issues a signal indicating whether or not to use the positioning function. When the navigation unit 60 does not use the positioning function, the process returns to the start. When the navigation unit 60 uses the positioning function, it outputs a positioning function use signal to the CPU 70. When the positioning function use signal is input, the CPU 70 outputs a positioning command signal for instructing positioning to the determination unit 30 via the bus 80. When the positioning unit 30 receives the positioning command signal, the determining unit 30 starts to determine which one of the first positioning unit 21 and the second positioning unit 22 is selected for positioning.

In S120, the determination unit 30 determines the selection of the positioning unit. Hereinafter, the determination performed by the determination unit 30 will be described in detail. In the determination, a determination condition is input to the determination condition input unit 31 in advance, and the input determination condition is stored in the determination condition storage unit 32. The determination condition setting unit 33 inputs the determination condition stored in the determination condition storage unit 32 and sets the determination condition. “Setting” a determination condition means adjusting, converting, or the like so that the selection determination unit 34 can process the input determination condition. The determination condition setting unit 33 outputs the determination condition to the selection determination unit 34 as a determination condition signal. The selection determination unit 34 performs determination based on the input determination condition signal. FIG. 8 shows some examples of determination condition setting to be input and set. In FIG. 8, the determination operation will be described by taking “1. The automobile 10 is an example of a moving object.
When the vehicle speed of the automobile 10 is used as the determination condition, the determination condition input unit 31 includes, for example,
“V ≦ 100km / h”
Is entered in advance as a conditional expression. V is a variable indicating the real-time vehicle speed of the automobile 10. Then, the selection determination unit 34 makes a determination based on this determination conditional expression.
In the determination condition input unit 31, the above-described determination condition formula of “V ≦ 100 km / h” is input as a program, for example. The speed of 100 km / h is merely an example constant and can be determined as appropriate at the time of input.
Next, the determination condition storage unit 32 stores the input expression.
Next, the determination condition setting unit 33 inputs the determination condition formula from the determination condition storage unit 32 and sets the selection determination unit 34 in a processable state. After setting, the determination condition setting unit 33 outputs the determination condition formula to the selection determination unit 34 as a determination condition signal.
Next, the determination performed by the selection determination unit 34 will be described. The selection determination unit 34 performs determination based on the above-described determination conditional expression “V ≦ 100 km / h” input as the determination condition signal. In the determination, the vehicle speed detection unit 90 detects the vehicle speed, and outputs the vehicle speed as determination target information 81 to the selection determination unit 34. For example, if the detected vehicle speed is 40 km / h, the selection determination unit 34 determines V as “40 km / h” in the above-described determination conditional expression “V ≦ 100 km / h”. In this case, the determination condition expression is satisfied, and the positioning unit to be selected when the determination condition expression is satisfied is selected.
Usually, when the speed is 100 km / h or less (when the vehicle speed is low), the determination is made so as to select the first positioning unit 21 that performs high-precision positioning. This is because high-precision positioning is not necessary when traveling at high speeds, while high-precision positioning is necessary when traveling on the back road at low speeds. For example, since the vehicle speed is 40 km / h, the selection determination unit 34 outputs the result as a determination signal to the switching unit 24 when it is determined to select the first positioning unit 21. In FIG. 6, the determination signal output from the selection determination unit 34 is input from the bus 80 to the switching unit 24 via the GPS positioning unit 20.

In S <b> 130, the switching unit 24 switches to the first positioning unit 21 that performs high-precision positioning using the system of the quasi-zenith satellite 200 and the electronic reference point network based on the input determination signal. The first positioning unit 21 inputs positioning information from the satellite receiving unit 23 and performs positioning.
Here, when the first positioning unit 21 performs positioning, the charging unit 40 performs charging when charging is necessary. First, when the first positioning unit 21 performs positioning, the billing processing unit 41 determines whether or not billing is necessary in conjunction with positioning, and bills if necessary. For example, the billing processing unit 41 checks whether the positioning information from the quasi-zenith satellite 200 includes a billing signal that is a signal related to billing. If the billing signal is included, billing is performed based on the billing signal. I do. At the time of charging, the integrated positioning time required for positioning by the first positioning unit 21 monitored by the positioning time monitoring unit 25 can be used for charging processing. The billing information storage unit 42 stores the result of billing performed by the billing processing unit 41 as billing information. The billing information transmission unit 43 transmits the billing information stored in the billing information storage unit 42 via the antenna 44 as appropriate to a billing center station (not shown) that handles billing information. Specifically, the billing information transmission unit 43 may use DSRC (Dedicated Short Range Communication), a mobile phone, or satellite communication (including the quasi-zenith satellite 200). It is assumed that a debit card or a credit card can be used for billing. When using these, the billing information transmitting unit 43 transmits billing information to a credit card company that is a billing center station. In addition to the case of using a debit card or a credit card, the billing processing unit 41 includes a prepaid card insertion unit (not shown), and the billing processing unit 41 pays directly with the prepaid card by inserting the prepaid card. You may be able to. That is, the billing processing unit 41 may have a function of rewriting the balance of the prepaid card.
The following business model can be considered for the above billing. The positioning information distribution center 400 provides positioning information capable of high-accuracy positioning for a fee. In this case, in addition to the positioning correction information, the charging signal is transmitted to the satellite (including the quasi-zenith satellite 200). The satellite distributes the positioning information including the received billing signal to the mobile body on the ground. The positioning information including the charging signal is charged. When using mobile positioning information, the mobile information terminal provided in the mobile charges the billing unit 40 as described above and transmits the billing information to a billing center station (for example, a credit card company). To do. The user of the positioning information has a credit card contract, and after using the paid positioning information including the charging signal, the user pays the usage fee to the credit card company (example of charging center station). The credit card company pays the positioning information distribution center 400 for using the positioning information of the user. In the case of a prepaid card, the positioning information center 400 issues a prepaid card and sells, distributes, etc. to those who wish to use the positioning information. In consideration of the case where the positioning user desires free positioning, positioning by the second positioning unit is free, and the free positioning is performed by selecting the second positioning unit by switching manually or by setting judgment conditions. You may make it selectable.
Although the case where the first positioning unit 21 charges when positioning is described, it may be charged when either the first positioning unit 21 or the second positioning unit 22 performs positioning.

  In S140, the first positioning unit 21 outputs the positioning result to the navigation unit 60. The navigation unit 60 performs navigation using the input positioning result. After the first positioning unit 21 outputs the positioning result, the process returns to the start in FIG. 7, and the above steps are repeated again.

  The process proceeds to S150 when the detected vehicle speed exceeds 100 km / h in the above-described determination conditional expression “V ≦ 100 km / h”. As described above, since the necessity for high-precision positioning is low during high-speed traveling, the selection determination unit 34 determines to select the second positioning unit 22 with normal accuracy. Also in this case, as in the case where the first positioning unit 21 is selected, the determination condition signal is output to the switching unit 24, and the following is the same as the case of the first positioning unit 21.

  In S120 described above, the determination operation has been described by taking the vehicle speed of the automobile 10 as an example. In the following, each other than “1. Vehicle speed of moving object” shown in FIG. 8 will be described.

A case will be described in which the determination condition setting unit 33 sets a determination condition for the degree of risk in the area where the mobile object travels. `` Danger level '' means, for example, that there is a lot of snow in winter and it is not clear where the road is due to snow, the road width is narrow in mountainous areas and there is a danger of falling into the valley, roads are complicated but accidents This is an indicator for indicating that there is some danger, such as an area where frequent occurrences are made. The range of the danger zone is input to the determination condition input unit 31. For example, three or more coordinates may be input, and a polygonal range connecting the points may be designated.
The determination condition setting unit 33 sets a determination condition so that the selection determination unit 34 can process whether or not there is a moving object in the dangerous area. The determination condition setting unit 33 outputs the set determination condition to the selection determination unit 34 as a determination condition signal.
When the selection determination unit 34 performs the determination, it cannot be determined whether or not the user is in the dangerous area without knowing the current position of the automobile 10. Therefore, it is necessary to measure the current position used for determination once. In this case, positioning is performed once with high-precision positioning, and the current position used for determination is acquired.

Next, a case where the determination condition setting unit 33 sets the integrated positioning time as a determination condition will be described. In this case, it is assumed that there is a charge when positioning is performed by the first positioning unit 21 that performs high-accuracy positioning, and there is no charge when positioning is performed by the second positioning unit 22 with normal accuracy. For example, when the integrated positioning time is set as the determination condition, it is determined that “the paid positioning by the first positioning unit 21 using the positioning information of the quasi-zenith satellite 200 is within 10 hours per month”. It is determined whether the positioning time of a month is 10 hours or less in total. Taking the case of “within 10 hours per month” as an example, the determination condition setting unit 33, for example,
"Total positioning time ≤ 10 hours per month"
Is set to a state that can be processed by the selection determination unit 34, and this determination condition equation is output to the selection determination unit 34 as a determination condition signal. The selection determining unit 34 inputs the integrated positioning time from the positioning time monitoring unit 25 as determination target information 83 in real time. When the integrated positioning time exceeds 10 hours and the determination condition formula is not satisfied, the selection determination unit 34 determines to switch the paid positioning by the first positioning unit 21 to the positioning by the free second positioning unit 22. . The result is output to the switching unit 24 as a determination signal. The following operations are the same as in the case of vehicle speed.

Next, the case where the determination condition setting unit 33 sets the determination condition based on the scale of the map reflecting the positioning result will be described. The “map that reflects the positioning result” is, for example, a map displayed on a display unit (not shown) in the navigation unit 60, and displays the position of the automobile 10 that is the positioning result of the GPS positioning unit 20. Means something. This map is stored in the map information storage unit 62 on a DVD (Digital Versatile Disk), HDD (Hard Disk Drive), or the like. High precision positioning is not necessary when using a map of the Kanto area, but high precision positioning is required when searching for a destination by displaying a detailed map on the navigation display. is necessary. The first positioning unit 21 has high accuracy and the second positioning unit 22 has normal accuracy, as in the above case. In the determination condition setting unit 33, as the determination condition,
“Scale of the map displayed on the display ≦ Scale of the map (set value)”
Is set to a state that can be processed by the selection determination unit 34, and this determination condition equation is output to the selection determination unit 34 as a determination condition signal. The “scale of the map displayed on the display unit” is input from the navigation unit 60 to the selection determination unit 34 as the determination target information 82. The scale of the map on the right side is set in advance. The selection determination unit 34 determines based on this determination conditional expression. The following operations are the same as in the case of vehicle speed.

Next, a case where the determination condition setting unit 33 sets a determination condition for the load on the CPU 70 will be described. When the load of the CPU 70 is equal to or higher than the predetermined load, it is determined to select the second positioning unit 22 having a small load and normal accuracy.
The determination condition setting unit 33 sets the load state of the CPU 70 as the determination condition.
“Real-time load of CPU 70 ≧ predetermined load of CPU 70 (set value)”
Is set to a state that can be processed by the selection determination unit 34, and this determination condition equation is output to the selection determination unit 34 as a determination condition signal. “CPU real-time load” is input from the CPU load sensor 71 to the selection determination unit 34 as determination target information 84.
The “predetermined CPU load” on the right side is set in advance. When the CPU load is equal to or greater than a predetermined value, it is determined that the second positioning unit 22 with normal accuracy should be selected. The following operations are the same as the vehicle speed.

Next, a case where the determination condition setting unit 33 sets the distance from the destination as the determination condition will be described. When the destination is close, high-precision positioning is often required, so it is determined whether the destination and the current position are within a predetermined distance. Since the current position is necessary for the determination, the GPS positioning unit 20 performs positioning once. When obtaining the distance to the destination, since accuracy of several tens of centimeters is not usually required, it is sufficient to perform positioning with the second positioning unit 22 having normal accuracy. The determination condition setting unit 33 sets the following determination condition expression as the determination condition expression.
"Distance between destination and current position ≤ Predetermined distance (setting value)"
Is set to a state that can be processed by the selection determination unit 34, and this determination condition equation is output to the selection determination unit 34 as a determination condition signal. The selection determining unit 34 uses the coordinates of the destination input in advance to the navigation unit 60 and the positioning result if the GPS positioning unit 20 is performing positioning, and inputs the positioning result as determination target information 82 from the navigation unit 60. To do. When there is no positioning result of the current position, positioning for acquiring the current position used for determination is performed by the second positioning unit 22 with normal accuracy as described above. Then, the determination is made based on the determination conditional expression. The selection determination unit 34 determines that the first positioning unit 21 for high-precision positioning should be selected when the distance to the destination is equal to or less than a predetermined distance. The following operations are the same as in the case of vehicle speed.

Next, a case where the determination condition setting unit 33 sets a road grade as a determination condition will be described. The “road grade” is an index indicating the road scale in terms of wide roads, many lanes, and the like. It is assumed that the road grade is determined in advance, and is attached to the road of the map information stored in the map information storage unit 62, for example.
For example, when traveling on an expressway or a main national road, the direction to travel is clear, so high-precision positioning is not required. On the other hand, high-precision positioning is required when traveling on an intricate back road with a narrow road width. Therefore, the road grade is used as the judgment condition. The judgment condition setting unit 33 is a judgment condition formula.
"Grade value of the road on which the moving object is currently traveling ≤ Predetermined grade value (set value)"
Is set to a state that can be processed by the selection determination unit 34, and this determination condition equation is output to the selection determination unit 34 as a determination condition signal.
For example, numbers are assigned to roads as grades. If a number is assigned as a grade, when there are three positioning units, the judgment condition formula can be increased and the grade can be divided into three regions for judgment.
In order to make the determination, it is necessary to know the grade of the road on which the vehicle is traveling. For this purpose, high-precision positioning is performed by the first positioning unit 21 once. Then, the map information in the map information storage unit 62 is collated to know the grade of the road that is running. The following is the same as in the case of vehicle speed.

Next, a case where the determination condition setting unit 33 sets the determination condition as to whether or not the car navigation user has accessed the car navigation will be described. For example, the determination criterion is whether or not the navigation function among the functions of the car navigation apparatus is operated. The function related to navigation is, for example, switching to high accuracy when a map displayed on a display unit (not shown) of the navigation unit 60 is enlarged, and switching to normal accuracy when the map is reduced. It is possible to freely set what function is determined.
The determination condition setting unit 33 sets the presence / absence of access to the navigation unit 60 as a determination condition so that the selection determination unit 34 can process it, and outputs the determination condition to the selection determination unit 34 as a determination condition signal. “Access to car navigation” is input from the navigation unit 60 to the selection determination unit 34 as the determination target information 82.
The selection determination unit 34 performs selection determination based on the determination target information 82. The following operations are the same as in the case of vehicle speed.

  Next, a case where the determination condition setting unit 33 performs determination to switch when the car navigation device displays some message will be described. For example, when there is a message display indicating that the intersection is approaching, a message display indicating that the destination is approaching, or the like, it is determined to select the first positioning unit 21 for high-accuracy positioning. The determination condition setting unit 33 sets, as a determination condition, whether or not the selection determination unit 34 can process the presence / absence of a message displayed on the message display unit 61, and outputs the determination condition to the selection determination unit 34 as a determination condition signal. . You can freely decide what kind of display you want to judge. Note that “display” includes all display by voice and display by characters, figures, and the like. The selection determination unit 34 inputs information indicating that a message has been received from the navigation unit 60 as the determination target information 82, and performs selection determination. The following operations are the same as in the case of vehicle speed.

  Moreover, the 1st positioning part 21 and the 2nd positioning part 22 can also be switched manually. For example, a manual switching unit can be arranged in the navigation unit 60, and a car navigation user can select a positioning unit according to the scene.

  The mobile information terminal according to the first embodiment includes the determination condition setting unit 33, the selection determination unit 34, and the switching unit 24. Therefore, the positioning unit is selected according to the CPU load, and the load on the CPU is reduced. Dispersion and reduction can be achieved.

  Since the mobile information terminal according to Embodiment 1 includes the determination condition setting unit 33, the selection determination unit 34, and the switching unit 24, it is possible to select a positioning unit having the required positioning accuracy according to the scene. it can.

  In the mobile information terminal according to the first embodiment, the determination condition setting unit 33 sets the determination condition based on the vehicle speed, so that a positioning unit suitable for the traveling vehicle speed can be selected. Further, by using an external determination condition called vehicle speed that is an influence of functions other than positioning, a positioning unit suitable for the external condition can be selected.

  In the mobile information terminal according to the first embodiment, the determination condition setting unit 33 sets the determination condition based on the risk level of the area where the automobile 10 travels, so that the safety of traveling of the automobile 10 can be improved.

  In the mobile information terminal according to the first embodiment, the determination condition setting unit 33 sets the determination condition based on the integrated positioning time for positioning, so that it can be used without worrying about overuse even for paid positioning. . In addition, customer management of a person who provides paid positioning information can be facilitated.

  In the mobile information terminal according to the first embodiment, the determination condition setting unit 33 sets the determination condition based on the scale of the map, so that positioning according to the scale of the map can be performed. Moreover, the effect of using the map can be further enhanced.

  In the mobile information terminal according to the first embodiment, the determination condition setting unit 33 sets the determination condition based on the load on the CPU, so that the processing capability of the CPU can be used effectively. Further, processing other than the positioning processing by the CPU can be performed without stagnation.

  In the mobile information terminal according to Embodiment 1, the determination condition setting unit 33 sets the determination condition based on the distance to the destination, so that the destination can be easily reached.

  In the mobile information terminal according to the first embodiment, the determination condition setting unit 33 sets the determination condition based on the road grade, so that positioning according to the road can be performed.

In the mobile information terminal according to the first embodiment, the determination condition setting unit 33 sets the determination condition based on the presence or absence of access to the car navigation device, so that it is possible to select a positioning unit that is linked to the car navigation function. it can.

  In the mobile information terminal according to the first embodiment, the determination condition setting unit 33 sets the determination condition based on the presence / absence of a message from the car navigation device, so that the positioning unit linked to the car navigation device can be selected. it can.

  In the mobile information terminal according to the first embodiment, since the switching unit 24 can be switched manually, the positioning unit can be easily selected according to the user's preference.

  Since the mobile information terminal according to the first embodiment includes the accounting processing unit 41, it is possible to easily charge the received positioning information.

  Since the mobile information terminal according to the first embodiment includes the billing information transmitting unit 43, billing information can be easily exchanged.

  In the mobile information terminal according to the first embodiment, the first positioning unit 21 and the second positioning unit 22 have different positioning accuracy, so that the required positioning accuracy can be selected depending on the scene.

  The mobile information terminal according to Embodiment 1 receives high-accuracy positioning information distributed by the quasi-zenith satellite 200, and therefore can perform positioning with an accuracy of several tens of centimeters to several centimeters. Also, since positioning information is received from the high-elevation quasi-zenith satellite 200, positioning information is received even when positioning information from low-elevation satellites such as urban buildings and mountainous areas is obstructed. can do.

Embodiment 2. FIG.
9 to 11 are diagrams for explaining a mobile information terminal according to Embodiment 2. FIG.
Embodiment 2 demonstrates the case where a mobile body information terminal is the vehicle-mounted integrated terminal 500. FIG.
The “in-vehicle integrated terminal 500” refers to the provision of necessary paperwork and entertainment such as car navigation, playback of received moving images, Internet connection, and driving operation support in the car 10 when the mobile body is the car 10. This means an information terminal that is used as a single unit.
In the in-vehicle integrated terminal 500 according to the second embodiment, the determination condition setting unit 640 performs initial determination individually for a plurality of objects such as the CPU load state and the vehicle speed of the automobile 10 that is a moving body, and further, based on the determination. The selection determination unit 630 makes a final determination. In other words, the determination condition setting unit 640 makes a lower determination, and the selection determination unit 630 makes an upper determination based on the lower determination.

FIG. 9 is a diagram showing a system in which the in-vehicle integrated terminal 500 is used. In FIG. 9, the positioning information distribution center 560 transmits the positioning correction information collected from the electronic reference point network described in FIG. 5 to the quasi-zenith satellite 200 via the satellite transmission center 550. The quasi-zenith satellite 200 distributes positioning information and positioning correction information, and also distributes contents such as moving images and sounds.
As shown in FIG. 9, the mobile information terminal for the next generation use is considered to be an “in-vehicle integrated terminal 500” that provides necessary business processing and entertainment functions in the automobile 10. The in-vehicle integrated terminal 500 provides, for example, the following functions as a single unit.
Examples of main functions are: 1. Car navigation by the car navigation operation unit 520. 2. Broadcast video playback, stored video playback by display on the projection monitor 510, 3. Internet connection via the input / output unit 530 of the in-vehicle computer incorporated in the in-vehicle integrated terminal 500; 4. Driving operation support 540 (providing data to the drive control device of the automobile 10); 5. Connection with public network communication line (not shown), There are charging data storage, charging data communication with the outside (not shown), and the like. These functions are currently provided by individual devices, but it is conceivable that these functions will be realized by a single in-vehicle integrated terminal 500 in the future.

  For positioning information used in next-generation car navigation, high-precision positioning information may be provided for a fee, and positioning information with inferior positioning accuracy may be provided free of charge. In this case, it is convenient if a person who uses positioning information can select paid and free positioning information.

  In the next generation application as described above, the positioning unit of the in-vehicle integrated terminal 500 includes, for example, the following three positioning units. That is, the positioning function through the car navigation operation unit 520 is based on the positioning accuracy: (1) high-precision positioning (decimator class accuracy), (2) GPS single positioning (with map matching function, 10 m class accuracy) (3 ) Normal accuracy positioning (meter class to 1 m or less class accuracy) is considered. In these three cases, in the in-vehicle integrated terminal 500, the CPU load for positioning is (1) having the largest load, (2) having the largest load, and (3) having the smallest load.

In the in-vehicle integrated terminal 500, when (1) high-accuracy positioning or (2) GPS single positioning with a map matching function is performed, the load on the CPU is large. If a connection or driving support operation is to be performed, moving image playback, Internet connection, or the like becomes slow or impossible. In addition, since necessary driving operation support cannot be performed, it is necessary to avoid them.
In addition, since the required positioning accuracy differs depending on the scene, such as the need for high-accuracy positioning depending on the scene or the need for high-accuracy positioning, provision of positioning accuracy according to the scene becomes an issue.
In order to realize this, a function of switching the positioning method manually or automatically according to the load state of the CPU and the necessity of the positioning accuracy depending on the scene is necessary.

  FIG. 10 is a configuration diagram of the in-vehicle integrated terminal 500 (an example of a mobile information terminal). The configuration diagram of FIG. 10 shows a configuration related to the GPS device, the car navigation function unit, and the moving image processing function among the car navigation function, the moving image reproduction, the Internet connection, and the like that are provided by the in-vehicle integrated terminal 500 described above. Yes.

The in-vehicle integrated terminal 500 includes a GPS device 600, a broadcast signal receiving unit 650, a moving image decoder 651, a video control unit 652, a central control unit (CPU) 655, a car navigation function unit 656, and a map information storage unit 657.
The GPS device 600 includes a positioning information receiving unit 610, a GPS positioning unit 620, a selection determining unit 630, and a determination condition setting unit 640.
The GPS positioning unit 620 includes three positioning units from the first positioning unit 621 to the third positioning unit 623 and a switching unit 624. The first positioning unit 621 has the highest positioning accuracy. The second positioning unit 622 has the next highest positioning accuracy after the first positioning unit 621. The third positioning unit 623 has the lowest positioning accuracy. The magnitude of the load on the central control unit (CPU) 655 is also the same in the order of positioning accuracy.
The switching unit 624 selectively switches the three positioning units.
The determination condition setting unit 640 includes a CPU load sensor 641, a positioning necessity determination sensor 642, and a charging condition sensor 643.

Reception of moving image information will be described. As for moving images, information to be received may be still images, audio information, character information, or the like.
The broadcast signal receiving unit 650 receives a broadcast signal of a moving image broadcast by a satellite such as the quasi-zenith satellite 200 or the ground station via the reception antenna 658, and outputs the received broadcast signal as a broadcast reception signal 702 to the moving image decoder 651. The moving picture decoder 651 decodes the received broadcast reception signal 702 and outputs it to the video control unit 652. The video control unit 652 outputs the input signal to the display unit 653 as image and audio information 703. The display unit 653 displays the input image and audio information 703. The central control unit (CPU) 655 controls these moving image processes.

  The map information storage unit 657 inputs the map information 701 from the broadcast signal receiving unit 650 and stores it when the broadcast signal includes map information. The car navigation function unit 656 exchanges a read / write signal 704 with respect to the map information with the map information storage unit 657 that stores the map information 701 as necessary. The stored map information is the latest map information or is more detailed than the map information stored in the map information storage unit (not shown) included in the car navigation function unit 656.

  FIG. 11 is a diagram illustrating a flow from determination of selecting a positioning unit to switching of the positioning unit based on the determination. The flow from determination to switching of the positioning unit in the in-vehicle integrated terminal 500 according to Embodiment 2 will be described with reference to FIG.

  In S210, it is determined whether or not to use the positioning function. When using the positioning function, the car navigation function unit 656 outputs a positioning function use signal to the central control unit (CPU) 655. The central control unit (CPU) 655 requested to perform positioning outputs a positioning command signal for instructing positioning to the determination condition setting unit 640. When the positioning function is not used, the process returns to the start in FIG.

In S220, the determination condition setting unit 640 performs individual determination. That is, the CPU load sensor 641 monitors the load state of the central control unit (CPU) 655, and makes a determination to switch the positioning accuracy when the load of the central control unit (CPU) 655 exceeds a predetermined value. . The determination condition formula of the load of the central control unit (CPU) 655 is the same as that in the first embodiment. There are three positioning units: a first positioning unit 621, a second positioning unit 622, and a third positioning unit 623. Therefore, the judgment condition formula also corresponds to this. For example, 3 such as F <F1, F1 ≦ F <F2, F2 <F (F1 and F2 are CPU loads of set values, and F represents a real-time CPU load detected by the CPU load sensor 641). Divide into two areas. When the first formula is met, the first positioning unit is selected, when the second formula is met, the second positioning unit 622 is selected, and when the third formula is met, the third positioning unit 623 is selected. . The same applies to the determination based on the vehicle speed by the next positioning necessity determination sensor 642.
The positioning necessity determination sensor 642 performs determination based on an external condition of the automobile 10 that is a moving body. In the second embodiment, the vehicle speed is detected by the vehicle speed detection unit 644, and the switching of the positioning unit is determined based on the vehicle speed. The determination condition formula relating to the vehicle speed is the same as in the first embodiment.
For example, when the positioning by the first positioning unit 621 and the second positioning unit 622 is paid, the charging condition sensor 643 determines to switch to the third positioning unit 623 which is free of charge.
The CPU load sensor 641, the positioning necessity determination sensor 642, and the charging condition sensor 643 output individual determination results to the selection determination unit 630 as determination condition signals 707. For this reason, the first determination results output from these sometimes conflict. For example, the CPU load sensor 641 may determine that the third positioning unit 623 is selected, and the positioning necessity determination sensor 642 and the charging condition sensor 643 may determine that the first positioning unit 621 is selected.

In S230, a final determination is made. That is, as described above, the selection determination unit 630 that has input conflicting signals as the determination condition signal performs final selection determination. The final determination is the determination of which positioning unit is finally selected from the first positioning unit 621 and the like for the conflicting determinations made by the individual sensors of the determination condition setting unit 640. Is to do. Here, the conditions for the determination performed by the selection determination unit 630 can be set freely. For example, priority can be given to any of the determinations made by the three sensors of the determination condition setting unit 640, or a combination of any two results may be used, or a match between all the sensors may be used as a condition.
Further, the following cases may be used.
When priority is given to high-accuracy positioning (positioning by the first positioning unit 621) and load distribution and reduction of the central control unit (CPU) 655 are required, the following (1) to (3) The selection determination unit 630 performs control that prioritizes high-accuracy positioning by limiting functions other than the positioning function.
(1) When using the video playback function that is playing broadcast (reception) video or playing back stored video, the video and audio that have deteriorated for several seconds to several tens of seconds are played during video playback. In the meantime, the load on the central control unit (CPU) 655 is distributed to high-precision positioning (positioning by the first positioning unit 621). Alternatively, only the sound may be played and the image may be a still image for several seconds.
(2) At the time of Internet connection, in the case of communication data communication other than voice and video (for example, stream data), while the human is not operating (after downloading a still image), the central control unit (CPU) 655 Since the load becomes light, this interval is used for the processing time of high-precision positioning.
(3) At the time of driving operation support data (providing data to the car 10 drive control device), when supporting an operation with a high safety requirement, data that may be thinned out is thinned out. In the meantime, high-precision positioning can be considered.

  In S240, selection determination unit 630 outputs the determination result as determination signal 706 to switching unit 624. The switching unit 624 switches to one of the first positioning unit 621, the second positioning unit 622, and the third positioning unit 623 in accordance with the input determination signal 706.

  In S250, the switched positioning unit performs positioning. For example, when the switching unit 624 switches to the first positioning unit 621, the first positioning unit 621 performs positioning by inputting the positioning information 705 output from the positioning information receiving unit 610. Then, the positioning result is output to the car navigation function unit 656. The car navigation function unit 656 performs navigation using the input positioning result. When positioning by S250 is completed, the process returns to the start.

  The above describes the case where the positioning unit is switched based on the determination, but manual switching is also possible. A manual selection unit 654 is provided in the display unit 653 of FIG. A person who uses the positioning function can select the first positioning unit 621 to the third positioning unit 623 by a manual selection unit 654 provided as a touch panel or the like on the display unit 653. In addition, the positioning unit can be switched by remote control using the remote controller 659.

  As described above, the in-vehicle integrated terminal 500 according to Embodiment 2 includes the determination condition setting unit 640, the selection determination unit 630, the switching unit 624, the first positioning unit 621, the second positioning unit 622, and the third positioning unit 623. Therefore, since the positioning accuracy can be switched in accordance with the CPU load, when a plurality of functions such as positioning and moving image reproduction are realized with one CPU, distribution management of CPU system resources can be performed.

  In the positioning function among the functions of the in-vehicle integrated terminal 500, it is assumed that the calculation for removing the wavelength integer bias in the case of positioning by carrier phase measurement in high-accuracy positioning becomes a heavy load on the CPU. The In this case, since the determination condition setting unit 640, the selection determination unit 630, the switching unit 624, and the first positioning unit 621 to the third positioning unit 623 are provided, the positioning unit can be switched according to the load of the CPU. When accuracy positioning is performed and the CPU load is high, it is possible to switch to a positioning method positioning unit with a low CPU load.

  The in-vehicle integrated terminal 500 according to the second embodiment includes the determination condition setting unit 640, the selection determination unit 630, the switching unit 624, and the first positioning unit 621 to the third positioning unit 623. Can be used efficiently according to the situation.

  In-vehicle integrated terminal 500 according to Embodiment 2 performs initial determination conditions individually in determination condition setting unit 640 and final determination in selection determination unit 630, and thus can be determined based on various conditions. In addition, the determination conditions can be set in detail. Furthermore, even when the priority of positioning accuracy and the priority of other functions collide, detailed condition setting can be performed.

In the above embodiment, in the mobile information terminal having the position measuring device for measuring the position,
The positioning device is
At least two positioning units for receiving positioning information and positioning the position;
A determination condition setting unit configured to set a determination condition used for determining which of the at least two positioning units to select and perform positioning, and to output as a determination condition signal;
A selection condition signal output from the determination condition setting unit is input, a determination is made as to which of the at least two positioning units is selected based on the input determination condition signal, and a determination result is output as a determination signal A determination unit;
A mobile information terminal having a positioning device including a switching unit that inputs the determination signal output from the selection determination unit and selectively switches the positioning by the at least two positioning units based on the input determination signal Explained.

  In the above embodiment, the determination condition setting unit has described the mobile information terminal having the position measurement device that sets the determination condition based on the speed of the mobile object equipped with the mobile information terminal.

  In the above embodiment, the determination condition setting unit includes a position information device that sets the determination condition based on a risk of a moving area where the moving object equipped with the moving object information terminal moves. Explained the terminal.

  In the above embodiments, the determination condition setting unit includes a position measurement device that sets the determination condition based on an integrated positioning time measured by any one of the at least two positioning units. Explained the terminal.

  In the above embodiment, the determination condition setting unit is a position positioning unit that sets the determination condition based on a scale of map information reflecting a positioning position measured by any one of the at least two positioning units. A mobile information terminal having a device has been described.

  In the above embodiment, the determination condition setting unit includes a position measurement device that sets the determination condition based on a load of a CPU that processes the positioning performed by any one of the at least two positioning units. Explained the terminal.

  In the above embodiment, the positioning device further determines whether or not to charge in conjunction with positioning when any one of the at least two positioning units performs positioning, and performs charging processing. A mobile information terminal having a positioning device with a charging processing unit to perform has been described.

  In the above embodiment, the positioning device further includes a positioning information device having a positioning device that includes a transmitting unit that inputs the charging information processed by the charging processing unit and transmits the input charging information. Explained.

  In the above embodiment, the mobile information terminal has been described in which each of the at least two positioning units has a positioning device that performs positioning with different positioning accuracy.

  In the above-described embodiment, the mobile information terminal has been described in which the at least two positioning units have a positioning device in which at least one positioning unit receives the positioning information from the quasi-zenith satellite and positions the position.

It is a figure which shows the system by which the mobile information terminal of Embodiment 1 is used. It is a figure which shows the orbit of a quasi-zenith satellite. It is a figure which shows the orbit of the quasi-zenith satellite with respect to the ground. It is a figure which shows the comparison of the elevation angle of a geostationary satellite and a quasi-zenith satellite. It is a figure which shows the electronic reference point network on the ground. 3 is a diagram showing a configuration of a mobile information terminal in Embodiment 1. FIG. It is a figure which shows the flow of positioning of a mobile information terminal. It is a figure which shows the example of determination conditions. It is a figure which shows the system by which a vehicle-mounted integrated mounting terminal is used. It is a figure which shows the structure of a vehicle-mounted integrated terminal. It is a figure which shows the flow of positioning of a vehicle-mounted integrated terminal.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 Car, 20 GPS positioning part, 21 1st positioning part, 22 2nd positioning part, 23 Satellite receiving part, 24 Switching part, 25 Positioning time monitor part, 30 Judgment part, 31 Judgment condition input part, 32 Judgment condition memory | storage part 33, determination condition setting unit, 34 selection determination unit, 40 charging unit, 41 charging processing unit, 42 charging information storage unit, 43 charging information transmission unit, 50 multimedia device, 60 navigation unit, 61 message display unit, 62 map information Storage unit, 70 CPU, 71 CPU load sensor, 80 bus, 81, 82, 83, 84 determination target information, 90 vehicle speed detection unit, 100 GPS device, 200 quasi-zenith satellite, 300 GPS satellite, 500 in-vehicle integrated terminal, 600 GPS Device, 610 positioning information receiving unit, 620 GPS positioning unit, 621 first positioning unit, 622 second positioning unit 623 Third positioning unit, 624 switching unit, 630 selection determination unit, 640 determination condition setting unit, 641 CPU load sensor, 642 positioning necessity determination sensor, 643 charging condition sensor, 644 vehicle speed detection unit, 653 display unit, 654 manual selection Unit, 655 central control unit (CPU), 656 car navigation function unit, 659 remote control, 706 determination signal, 707 determination condition signal.

Claims (15)

In a mobile information terminal having a positioning device for positioning a position,
The positioning device is
At least two positioning units for receiving positioning information and positioning the position;
A determination condition setting unit configured to set a determination condition used for determining which of the at least two positioning units to select and perform positioning, and to output as a determination condition signal;
A selection condition signal output from the determination condition setting unit is input, a determination is made as to which of the at least two positioning units is selected based on the input determination condition signal, and a determination result is output as a determination signal A determination unit;
A switching unit that inputs the determination signal output from the selection determination unit and selectively switches the positioning by the at least two positioning units based on the input determination signal;
The at least two positioning units include
1st which receives the high-precision positioning information which shows the information used for the correction | amendment in the case of positioning a position, and measures a position with higher precision than the positioning precision of any other positioning part based on the received high-precision positioning information A mobile information terminal having a position positioning device including a positioning unit. The first positioning unit is
The mobile information terminal having a positioning device according to claim 1, wherein the high-precision positioning information is received from a satellite. The first positioning unit is
The mobile information terminal having a positioning device according to claim 1, wherein the high-accuracy positioning information is received from a quasi-zenith satellite. The at least two positioning units further include
A second positioning unit that receives positioning information only from a GPS (Global Positioning System) satellite and positions the position is included,
The first positioning unit is
The moving body information having a positioning device according to claim 1, wherein positioning information is received from each of the quasi-zenith satellite and the GPS satellite, and the position is determined with higher accuracy than any other positioning unit. Terminal. The high-precision positioning information received by the first positioning unit is
5. The method according to claim 1, wherein the information is generated based on positioning correction information indicating information generated by each of the plurality of electronic reference points and including an error in a position of each electronic reference point itself. A mobile information terminal comprising the positioning device described in 1. The orbit of the quasi-zenith satellite is
5. A mobile information terminal having a positioning device according to claim 3, wherein an inclination angle from the equator plane is about 45 degrees and an eccentricity is about 0.099. The determination condition setting unit
The mobile information terminal having a position measuring device according to any one of claims 1 to 6, wherein the determination condition is set based on a speed of a mobile object equipped with the mobile information terminal. The determination condition setting unit
The mobile body information terminal which has the positioning device in any one of Claims 1-6 which sets the said determination conditions based on the risk of the movement area where the mobile body equipped with the said mobile body information terminal moves. The determination condition setting unit
The movement having a positioning device according to claim 1, wherein the determination condition is set based on an integrated positioning time measured by any one of the at least two positioning units. Body information terminal. The determination condition setting unit
7. The determination condition according to claim 1, wherein the determination condition is set based on a scale of map information reflecting a positioning position measured by any one of the at least two positioning units. A mobile information terminal having a positioning device. The determination condition setting unit
7. The determination condition according to claim 1, wherein the determination condition is set based on a load of a CPU (central processing unit) that processes positioning performed by any one of the at least two positioning units. Mobile information terminal having a position measuring device. The positioning device is
And a charging processing unit for determining whether or not to charge in conjunction with the positioning and performing a charging process when any one of the at least two positioning units performs positioning. Item 7. A mobile information terminal comprising the position positioning device according to any one of items 1 to 6. The positioning information received from the quasi-zenith satellite by the first positioning unit is:
Including a billing signal that is a signal related to billing,
The positioning device further includes:
When the first positioning unit starts positioning by switching the switching unit, it is confirmed whether the charging signal is included in the positioning information received by the first positioning unit, and the charging signal is included. 5. A mobile information terminal having a positioning device according to claim 4, further comprising a billing processing unit that performs billing processing based on the billing signal when it is confirmed that the billing signal has been confirmed. The positioning device is
The mobile device having a positioning device according to claim 12, further comprising a transmission unit that inputs the charging information processed by the charging processing unit and transmits the input charging information. Body information terminal. The at least two positioning units are:
The mobile information terminal having a position positioning device according to any one of claims 1 to 6, wherein each positioning is performed with different positioning accuracy.

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