JP2006071459A - Positioning system, terminal device, and control program of terminal device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a positioning system acquiring positioning position information corresponding to generated positioning base information, while reducing power consumption, concerning the positioning system of a server positioning type. <P>SOLUTION: This terminal device 50 has: an operation mode information storage means for storing operation mode information showing an ordinary mode for transmitting the positioning base information to a positioning calculation device 20 at every generation time and a power saving mode for preserving the positioning base information; a battery residual quantity determination means for determining whether the battery residual quantity is in an ordinary mode corresponding range corresponding to the ordinary mode or in a power saving mode corresponding range corresponding to the power saving mode; an operation mode setting means for setting in the ordinary mode or in the power saving mode based on a determination result by the battery residual quantity determination means; a transmission interval time elapse determination means for determining whether a transmission interval time until transmitting the positioning base information elapses in the power saving mode; an interval time positioning base information transmission means for transmitting the positioning base information to the positioning calculation device 20; and the like. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a positioning system using a signal from a satellite, a terminal device, and a control program for the terminal device.

Conventionally, a positioning system that measures the current position of a GPS receiver by using, for example, a GPS (Global Positioning System) that is a satellite navigation system has been put into practical use.
There are several types of this positioning system. The GPS receiver receives a signal from a GPS satellite, and information on the distance from the GPS satellite to the GPS receiver, information on the frequency, etc. (hereinafter referred to as positioning basic information). Generate and transmit this positioning basic information to an external device, and the external device that has received the positioning basic information performs positioning calculation of the current position of the GPS receiver to generate positioning position information (hereinafter referred to as server positioning type) (For example, Patent Document 1).
In such a system, since the GSP receiver receives the positioning position information generated by the external device, it is not necessary for the GPS receiver to perform positioning calculation, so that the processing load on the GPS receiver can be reduced. There are advantages.
JP 2000-131415 A (FIG. 1 etc.)

  However, the above-described system needs to communicate with an external device every time the GPS receiver generates positioning basic information, and thus there is a problem that power is consumed by the communication and the battery may be quickly depleted. It was.

  Therefore, the present invention provides a positioning system, a terminal device, and a terminal device control program capable of acquiring positioning position information corresponding to the generated positioning basic information while reducing power consumption in a server positioning type positioning system. The purpose is to provide.

  According to the first invention, the object is a positioning system including a terminal device that receives a position-related signal from a position information satellite, and a positioning calculation device that can communicate with the terminal device, the terminal device comprising: A positioning basic information generating means for generating positioning basic information for the positioning calculation device to use for positioning calculation based on the position-related signal from the position information satellite; and the positioning each time the positioning basic information is generated An operation mode information storage means for storing operation mode information indicating a normal mode for transmitting basic information to the positioning calculation device; and a power saving mode for storing the positioning basic information after generating the positioning basic information; and the terminal device Battery remaining amount information generating means for generating battery remaining amount information indicating the remaining amount of the battery, and whether the remaining battery amount is within a normal mode compatible range corresponding to the normal mode A battery remaining amount determining unit that determines whether the power saving mode is compatible with the power saving mode, and an operation mode that is set to the normal mode or the power saving mode based on a determination result of the battery remaining amount determining unit Setting means and transmission for determining whether or not a transmission interval time from when the positioning basic information is transmitted to the positioning calculation apparatus until the next transmission of the positioning basic information has elapsed in the power saving mode. An interval time lapse determination means; and an interval time positioning basic information transmission means for transmitting the positioning basic information to the positioning calculation device based on a determination result of the transmission interval time lapse determination means, and the positioning The computing device measures the position of the terminal device based on the positioning basic information receiving means for receiving the positioning basic information from the terminal device and the positioning basic information. And position calculating means, are achieved by a positioning system and having a a positioning result information transmitting means for transmitting to the terminal device the positioning result information indicating the positioning result by the positioning means.

According to the configuration of the first invention, the terminal device can generate the battery remaining amount information by the battery remaining amount information generating means, and the battery remaining amount is determined by the battery remaining amount determining means by the normal mode. It can be determined whether it is within the corresponding range or the power saving mode compatible range.
And the said terminal device can be set to the said normal mode or the said power saving mode based on the determination result of the said battery residual amount determination means by the said operation mode setting means.
Further, the terminal device determines whether or not the transmission interval time has elapsed since the last transmission of the basic positioning information to the positioning calculation device capable of communicating with the terminal device by the transmission interval time elapse determining means. be able to.
And the said terminal device can transmit the said positioning basic information with respect to the said positioning calculation apparatus based on the determination result of the said transmission interval time determination means by the said positioning basic information transmission means.
As described above, in the power saving mode, instead of transmitting the positioning basic information to the positioning calculation device every time the positioning basic information is generated, the positioning basic information is transmitted when the transmission interval time has elapsed. Can be transmitted, the number of communications with the positioning calculation device can be reduced, and as a result, power consumption can be reduced.
On the other hand, the positioning calculation device can receive the positioning basic information from the terminal device by the positioning basic information receiving means, and determines the position of the terminal device based on the positioning basic information by the positioning calculation means. Thus, the positioning result information can be generated.
And since the said terminal device can communicate with the said positioning calculation apparatus, it can acquire the said positioning result information. That is, the terminal device can acquire the positioning result information corresponding to the positioning basic information generated by the terminal device itself from the positioning calculation device.
Thereby, in a server positioning type positioning system, it is possible to provide a positioning system capable of acquiring positioning position information corresponding to the generated positioning basic information while reducing power consumption.

  According to the second invention, the object is a terminal device that receives a position-related signal from a position information satellite, and is capable of communicating with the terminal device based on the position-related signal from the position information satellite. Positioning basic information generating means for generating positioning basic information to be used by the calculating device for positioning calculation, normal mode for transmitting the positioning basic information to the positioning calculating device every time the positioning basic information is generated, and the positioning Operation mode information storage means for storing operation mode information indicating a power saving mode for storing the positioning basic information after generating basic information, and remaining battery information for generating remaining battery information indicating the remaining battery power of the terminal device And generating means for determining whether the remaining battery level is within a normal mode compatible range corresponding to the normal mode or a power saving mode compatible range corresponding to the power saving mode. A battery remaining amount determining means, an operation mode setting means for setting the normal mode or the power saving mode based on a determination result of the battery remaining amount determining means, and the positioning calculation device in the power saving mode. A transmission interval time elapse determining means for determining whether or not a transmission interval time from the previous transmission of the positioning basic information to the next transmission of the positioning basic information has passed, and a determination result of the transmission interval time elapse determining means Based on the time interval basic information transmitting means for transmitting the positioning basic information to the positioning calculation device, and positioning result information for receiving the positioning result information generated by the positioning calculation device based on the positioning basic information And a receiving device.

  According to the configuration of the second invention, positioning position information corresponding to the generated positioning basic information can be acquired while reducing power consumption, similarly to the configuration of the first invention.

  According to a third aspect of the invention, in the configuration of the second aspect of the invention, movement speed information generation means for generating movement speed information indicating the movement speed of the terminal device, and transmission for changing the transmission interval time corresponding to the movement speed And an interval time changing means.

As the moving speed of the terminal device is slower, the difference between the position indicated by the positioning result information acquired by the terminal device and the current position is considered to be smaller. Therefore, the position indicated by the positioning result information acquired last time. The validity of using as the current position is large.
In this regard, according to the configuration of the third invention, the terminal apparatus generates movement speed information indicating the movement speed of the terminal apparatus by the movement speed information generation means, and the movement by the transmission interval time change means. The transmission interval time is changed according to the speed. For example, the transmission interval time is set longer as the moving speed is slower.
For this reason, when the moving speed is slow, the positioning result information acquired last time is set as the current position for a longer time without acquiring the positioning result information by transmitting the positioning basic information to the positioning calculation device. Since it is used, the positioning result information with high validity can be used while further reducing power consumption.

  According to a fourth aspect of the present invention, there is provided a terminal device that receives a position related signal from a position information satellite, and is capable of communicating with the terminal device based on the position related signal from the position information satellite. Positioning basic information generating means for generating positioning basic information to be used by the calculation device for positioning calculation, normal mode for transmitting the positioning basic information to the positioning calculating device every time it is generated, and after generating the positioning basic information An operation mode information storage means for storing operation mode information indicating a power saving mode for storing the positioning basic information; a battery remaining capacity information generating means for generating battery remaining information indicating the battery remaining capacity of the terminal device; A battery remaining capacity determination for determining whether the remaining battery level is within a normal mode compatible range corresponding to the normal mode or a power saving mode compatible range corresponding to the power saving mode. Means, an operation mode setting means for setting the normal mode or the power saving mode based on the determination result of the battery remaining amount determining means, and the battery remaining amount in the power saving mode is determined by the positioning calculation device. Based on the determination result of the communication limit battery remaining amount determination unit for determining whether the communication limit battery remaining amount is the limit battery remaining amount that can be communicated, and the communication limit battery remaining amount determination unit, Communication limit battery remaining amount positioning basic information transmitting means for transmitting the positioning basic information to the positioning calculation device, and positioning result information reception for receiving the positioning result information generated by the positioning calculation device based on the positioning basic information And a terminal device characterized by comprising: means.

According to the configuration of the fourth invention, the communication limit battery remaining amount determination means can determine whether the battery remaining amount is the communication limit battery remaining amount in the power saving mode, The positioning basic information can be transmitted to the positioning calculation device by the communication limit battery remaining amount positioning basic information transmitting means.
For example, the terminal device continues to store the positioning basic information when the battery remaining amount is higher than the communication limit battery remaining amount. And if the said terminal device judges that the said battery remaining charge is the said communication limit battery remaining charge, it will transmit the said positioning basic information to the said positioning calculation apparatus.
For this reason, since the communication frequency between the terminal device and the positioning calculation device is, for example, one degree, it is possible to reduce the power consumption due to the terminal device communicating with the positioning calculation device to a minimum.

  According to a fifth aspect of the invention, in the configuration of the fourth aspect of the invention, the communication limit battery remaining amount changing unit changes the communication limit battery remaining amount in accordance with the amount of the stored positioning basic information. To do.

The larger the amount of the positioning basic information stored in the terminal device, the more the communication limit battery remaining amount is required.
In this regard, according to the configuration of the fifth invention, the communication limit battery remaining amount changing means changes the communication limit battery remaining amount according to the amount of the positioning basic information stored. For example, the larger the amount of positioning basic information, the larger the communication limit battery remaining amount is set.
Thereby, even if the amount of the positioning basic information is large, all the stored positioning basic information can be reliably transmitted to the positioning calculation device.

  According to a sixth aspect of the present invention, in the configuration according to any one of the second to fifth aspects, the battery is stored when the remaining battery level shifts from the power saving mode compatible range to the normal mode compatible range. The positioning basic information is transmitted to the positioning calculation device.

When the remaining battery level shifts from the power saving mode compatible range to the normal mode compatible range, the battery of the terminal device is being charged. Therefore, there is no problem that the battery runs out even when the terminal device consumes power.
In this regard, according to the configuration of the fifth invention, the terminal device stores the positioning when the remaining battery level shifts from the power saving mode compatible range to the normal mode compatible range. Basic information is transmitted to the positioning calculation device.
Thereby, the terminal device can acquire the positioning result information corresponding to the generated positioning basic information after determining that the problem of battery depletion has been solved.

  According to the seventh aspect, the object is that a terminal device that receives a position related signal from a position information satellite can communicate with the terminal device based on the position related signal from the position information satellite. A positioning basic information generation step for generating positioning basic information for use in positioning calculation by the positioning calculation device, and a battery remaining amount information generation in which the terminal device generates battery remaining amount information indicating a battery remaining amount of the terminal device. And the terminal device determines whether the remaining battery level is within a normal mode corresponding range corresponding to a normal mode in which the positioning basic information is transmitted to the positioning calculation device each time the positioning basic information is generated. A remaining battery level determining step for determining whether or not a power saving mode compatible range corresponding to a power saving mode for storing the positioning basic information after generating In the battery remaining amount determining step, when it is determined that the battery remaining amount is within the power saving mode compatible range, an operation mode setting step for setting the power saving mode, and the terminal device includes the power saving mode. , A transmission interval time for determining whether or not a transmission interval time from when the positioning basic information is transmitted to the next time the positioning basic information is transmitted to the positioning calculation device capable of communicating with the terminal device has elapsed. When determining that the transmission interval time has elapsed since the previous transmission of the positioning basic information in the transmission interval time elapse determining step, the terminal determining step with respect to the positioning calculation device An interval time positioning basic information transmission step for transmitting positioning basic information; and the terminal device, wherein the positioning calculation device is based on the positioning basic information. Is accomplished by the control program of the terminal device, wherein the positioning result information receiving step of receiving the generated positioning result information, that is the execution Te.

  According to the configuration of the seventh invention, similarly to the configuration of the first invention, it is possible to acquire positioning position information corresponding to the generated positioning basic information while reducing power consumption.

  According to the eighth aspect, the object is that a terminal device that receives a position related signal from a position information satellite can communicate with the terminal device based on the position related signal from the position information satellite. A positioning basic information generation step for generating positioning basic information for use in positioning calculation by the positioning calculation device, and a battery remaining amount information generation in which the terminal device generates battery remaining amount information indicating a battery remaining amount of the terminal device. And the terminal device determines whether the remaining battery level is within a normal mode corresponding range corresponding to a normal mode in which the positioning basic information is transmitted to the positioning calculation device each time the positioning basic information is generated. A remaining battery level determining step for determining whether or not a power saving mode compatible range corresponding to a power saving mode for storing the positioning basic information after generating In the battery remaining amount determining step, when it is determined that the battery remaining amount is within the power saving mode compatible range, an operation mode setting step for setting the power saving mode, and the terminal device includes the power saving mode. A communication limit battery remaining amount determination step for determining whether the battery remaining amount is a communication limit battery remaining amount that is a limit battery remaining amount capable of communicating with the positioning calculation device; and the terminal When the apparatus determines that the remaining battery level is within the communication limit battery remaining capacity range in the communication limit battery remaining capacity determination step, the apparatus transmits the positioning basic information to the positioning calculation apparatus. A communication limit battery remaining amount positioning basic information transmission step, and the terminal device generates the positioning calculation device based on the positioning basic information. A positioning result information reception step of receiving the positioning result information, are achieved by a control program of the terminal device, characterized in that for the execution.

  According to the configuration of the eighth invention, similarly to the configuration of the fourth invention, the number of communications between the terminal device and the positioning calculation device is, for example, one, so that the terminal device is connected to the positioning calculation device. Power consumption due to communication can be reduced to a minimum.

Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings.
The embodiments described below are preferred specific examples of the present invention, and thus various technically preferable limitations are given. However, the scope of the present invention is particularly limited in the following description. Unless otherwise stated, the present invention is not limited to these embodiments.

(First embodiment)
FIG. 1 is a schematic diagram showing a positioning system 10 and the like according to the first embodiment of the present invention.
As shown in FIG. 1, the positioning system 10 is a terminal device that receives, for example, signals S1, S2, S3, and S4 that are position-related signals from GPS satellites 12a, 12b, 12c, and 12d that are position information satellites. For example, the terminal 50 is included. The terminal 50 is, for example, a mobile phone, a PHS (Personal Handy-phone System), a PDA (Personal Digital Assistance _), or the like, but is not limited thereto. The terminal 50 receives the signal S1 and the like by the terminal GPS device 62.

  As shown in FIG. 1, the positioning system 10 is a positioning calculation device that can communicate with the terminal 50 via a communication base station, for example, a base station 40 and a communication network, for example, the Internet network 45. It has a server 20.

The terminal 50 generates positioning basic information, which will be described later, based on the signal S1 and the like, and transmits this to the server 20. Then, as will be described later, the server 20 calculates the current position of the terminal 50 based on the positioning basic information received from the terminal 50 and transmits positioning position information indicating the positioning calculation result to the terminal 50.
That is, the positioning system 10 is a server positioning type positioning system.

(Main hardware configuration of server 20)
FIG. 2 is a schematic diagram illustrating a main hardware configuration of the server 20.
As shown in FIG. 2, the server 20 has a computer, and the computer has a bus 22.
A CPU (Central Processing Unit) 24, a storage device 26, and the like are connected to the bus 22. The storage device 26 is, for example, a RAM (Random Access Memory) or a ROM (Read Only Memory).

Further, for example, an external storage device 28 which is an HD (Hard Disk) and an input device 30 for inputting various information and the like are connected to the bus 22.
Further, a server communication device 32 for communicating with the terminal 50 of FIG. 1 is connected to the bus 22. The server communication device 32 is an example of a positioning basic information receiving unit that receives positioning basic information described later from the terminal 50.
The bus 22 is connected to a server GPS device 34 for receiving a signal S1 and the like from the GPS satellite 12a and the like.
In addition, a server display device 36 for displaying various information and a power source 38 for supplying power to the server 210 are connected to the bus 22.

(Main hardware configuration of terminal 50)
FIG. 3 is a schematic diagram showing a main hardware configuration of the terminal 50.
As shown in FIG. 3, unlike the server 20, the terminal 50 does not have an external storage device. On the other hand, the terminal 50 includes a battery 68 that is an independent power supply means that does not communicate with the outside. Further, the terminal 50 includes a speed sensor 70 for measuring the moving speed of the terminal 50.

(Main software configuration of server 20)
FIG. 4 is a schematic diagram showing a main software configuration of the server 20.
As shown in FIG. 4, the server 20 includes a server control unit 100 that controls each unit, a server communication unit 102 corresponding to the server communication device 32 in FIG. 2, a server GPS unit 104 corresponding to the server GPS device 34 in FIG. Have

As illustrated in FIG. 4, the server 20 also includes a server first storage unit 110 that stores various programs and a server second storage unit 150 that stores various types of information.
As shown in FIG. 4, the server 20 stores an assist data generation program 112 in the server first storage unit 110. The assist data generation program 112 is information for the server control unit 100 to generate assist data 156 based on a request from the terminal 50.

  Specifically, the server control unit 100 acquires the satellite information 152 generated based on the signal S1 from the GPS satellite 12a or the like (see FIG. 1) and the terminal 50 by the assist data generation program 112 in advance. Based on the terminal approximate position information 154, assist data 156 is generated. The satellite information 152 is information including orbit information of each GPS satellite 12a and the like, for example. The terminal approximate position information 154 is, for example, information indicating the latitude, longitude, and altitude of the base station 40 with which the terminal 50 is communicating.

The assist data 156 is information including, for example, an identification code of the GPS satellite 12a and the like that can be observed from the terminal 50, Doppler frequency information calculated from the approximate position of the terminal 50 and orbit information of each GPS satellite 12a and the like.
The server control unit 100 stores the generated assist data 156 in the server second storage unit 150 and transmits it to the terminal 50 based on the assist data transmission program 114. As will be described later, the terminal 50 receives the signal S1 or the like from the GPS satellite 12a or the like using the assist data 156, and generates positioning basic information.

As shown in FIG. 4, the server 20 stores a positioning calculation program 116 in the server first storage unit 110. The positioning calculation program 116 is information for the server 100 to measure the position of the terminal 50 based on the positioning basic information described later acquired from the terminal 50 and generate the positioning position information 158. This positioning position information 158 is an example of positioning result information. The positioning calculation program 116 and the server control unit 100 are examples of positioning calculation means.
The server control unit 100 stores the generated positioning position information 158 in the server second storage unit 150 and transmits it to the terminal 50 based on the positioning position information transmission program 118.

(Main software configuration of terminal 50)
FIG. 5 is a schematic diagram showing a main software configuration of the terminal 50.
As shown in FIG. 5, the terminal 50 includes a terminal control unit 200 that controls each unit, a terminal communication unit 202 corresponding to the terminal communication device 60 in FIG. 3, a terminal GPS unit 204 corresponding to the terminal GPS device 64 in FIG. Have

  As shown in FIG. 5, the terminal 50 also includes a terminal first storage unit 210 that stores various programs, a terminal second storage unit 250 that stores various information in advance, and a terminal that stores information acquired or generated by the terminal 50. A third storage unit 270 is included.

  As illustrated in FIG. 5, the terminal 50 stores terminal approximate position information 272 in the terminal third storage unit 270. The terminal approximate position information 272 is information indicating the approximate position of the terminal 50, for example, information indicating the position of the base station 40 (see FIG. 1) to which the terminal 50 is connected.

As illustrated in FIG. 5, the terminal 50 stores an assist data request program 212 in the terminal first storage unit 210. The assist data request program 212 is information for the terminal control unit 200 to request the assist data 156 (see FIG. 4) from the server 20 (see FIG. 1).
The terminal control unit 200 stores the assist data 156 acquired from the server 20 as assist data 274 in the terminal third storage unit 270.

  As illustrated in FIG. 5, the terminal 50 stores a positioning basic information generation program 214 in the terminal first storage unit 210. The positioning basic information generation program 214 is information for the terminal control unit 200 to generate positioning basic information 276 that the server 20 uses for positioning calculation based on the signal S1 from the GPS satellite 12a and the like. This positioning basic information 276 is an example of positioning basic information. The positioning basic information generation program 214 and the terminal control unit 200 are examples of positioning basic information generation means.

The positioning basic information 276 includes, for example, information on the distance between each GPS satellite 12a and the terminal 50 and the terminal 50, information on the time when the signal S1 and the like are received, information on the frequency at which the signal S1 and the like are received.
The terminal control unit 200 stores the generated positioning basic information 276 in the terminal third storage unit 270.

  As illustrated in FIG. 5, the terminal 50 stores operation mode information 252 in the terminal second storage unit 250. The operation mode information 252 is information indicating the normal mode 252a and the power saving mode 252b.

FIG. 6 is a diagram illustrating an example of the operation mode information 252 and the like.
As shown in FIG. 6A, in the normal mode 252a, the terminal 50 transmits the above-described positioning basic information 276 to the server 20 after generation. That is, the terminal 50 transmits the positioning basic information 276 to the server 20 every time it is generated.

On the other hand, as illustrated in FIG. 6A, in the power saving mode 252b, the terminal 50 stores the positioning basic information 276 in the terminal third storage unit 270 without immediately transmitting the positioning basic information 276 to the server 20. . In the power saving mode 252b, the terminal 50 transmits the saved positioning basic information 276 to the server 20 at a certain timing as described later. Thus, in the power saving mode 252b, since the positioning basic information 276 is not transmitted to the server 20 every time it is generated, the power used for communication with the server 20 can be reduced.
The normal mode 252a described above is an example of a normal mode, and the power saving mode 252b is an example of a power saving mode. The terminal second storage unit 250 is an example of an operation mode information storage unit.
Note that, when the positioning basic information 276 is transmitted to the server 20, the terminal 50 is configured to generate positioning basic information transmission time information 282 indicating the transmission time and store it in the terminal third storage unit 270.

  As illustrated in FIG. 5, the terminal 50 stores a battery remaining amount information generation program 216 in the terminal first storage unit 210. The battery remaining amount information generation program 216 is information for the terminal control unit 200 to generate battery remaining amount information 278 indicating the remaining amount of power of the battery 68 (see FIG. 2) (hereinafter referred to as the remaining battery amount). . The battery remaining amount information 278 is an example of battery remaining amount information. The battery remaining amount information generation program 216 and the terminal control unit 200 are examples of battery remaining amount information generating means.

The terminal control unit 200 continuously generates the remaining battery information 278 based on the remaining battery information generation program 216.
The terminal control unit 200 stores the generated battery remaining amount information 278 in the terminal third storage unit 270. That is, the terminal control unit 200 continuously updates the battery remaining amount information 278.

  As illustrated in FIG. 5, the terminal 50 stores an operation mode switching threshold battery remaining amount comparison program 218 in the terminal first storage unit 210. The operation mode switching threshold battery remaining amount comparison program 218 causes the terminal control unit 200 to compare the operation mode switching threshold indicated by the operation mode switching threshold information 254 with the battery remaining amount indicated by the battery remaining amount information 278, and Is information for determining whether the value is within the range corresponding to the normal mode 252a or the range corresponding to the power saving mode 252b.

  As shown in FIG. 6B, the operation mode switching threshold is, for example, 30% of the power of the battery 68 (see FIG. 3) fully charged. The remaining battery level above the operation mode switching threshold is in a range corresponding to the normal mode 252a, and the remaining battery level below the operation mode switching threshold is in a range corresponding to the power saving mode 252b. That is, the remaining battery level equal to or higher than the operation mode switching threshold is an example in the normal mode compatible range, and the remaining battery level less than the operating mode switching threshold is an example in the power saving mode compatible range. The operation mode switching threshold battery remaining amount comparison program 218 and the terminal control unit 200 are examples of a battery remaining amount determining unit.

  As illustrated in FIG. 5, the terminal 50 stores an operation mode switching program 220 in the terminal first storage unit 210. The operation mode switching program 220 is for the terminal control unit 200 to set the operation mode of the terminal 50 to the normal mode 252a or the power saving mode 252b based on the determination result by the operation mode switching threshold battery remaining amount comparison program 218 described above. Information. That is, the operation mode switching program 220 and the terminal control unit 200 are examples of operation mode setting means.

  As illustrated in FIG. 5, the terminal 50 stores a positioning basic information transmission interval time determination program 222 in the terminal first storage unit 210. The positioning basic information transmission interval time determination program 222 is based on the positioning basic information from when the terminal control unit 200 transmits the previous positioning basic information 276 to the server 20 in the power saving mode 252b (see FIG. 6A). This is information for determining whether or not the transmission interval time for transmitting the information 276 has elapsed. That is, the positioning basic information transmission interval time determination program 222 and the terminal control unit 200 are examples of a transmission interval time elapsed determination unit.

  Specifically, the terminal control unit 200 determines the positioning basic information transmission interval time information stored in the terminal second storage unit 250 from the time when the previous positioning basic information 276 indicated in the positioning basic information transmission time information 282 is transmitted. It is determined whether or not the transmission interval time indicated by 256 has elapsed. This transmission interval time is, for example, 5 minutes as shown in FIG.

  As illustrated in FIG. 5, the terminal 50 stores a positioning basic information transmission program 224 in the terminal first storage unit 210. The positioning basic information transmission program 224 is information for the terminal control unit 200 to transmit the positioning basic information 276 to the server 20 based on the determination result by the positioning basic information transmission interval time determination program 222 described above. That is, the positioning basic information transmission program 224 and the terminal control unit 200 are examples of interval positioning basic information transmission means.

As described above, when receiving the positioning basic information 276 from the terminal 50, the server 20 generates positioning position information 158 (see FIG. 4) indicating the position of the terminal 50.
Then, the terminal control unit 200 of the terminal 50 receives the positioning position information 158 from the server 20 by the terminal communication unit 202 and stores it in the terminal third storage unit 270 as the positioning position information 284. That is, the terminal communication unit 202 and the terminal control unit 200 are examples of positioning result information receiving means.
Then, the terminal 50 displays the positioning position information 284 on, for example, the terminal display device 66 (see FIG. 3).

  As described above, in the power saving mode 252b (see FIG. 6A), the terminal 50 does not transmit the positioning basic information 276 to the server 20 every time it generates the positioning basic information transmission interval time (see FIG. Since the positioning basic information 276 is transmitted when 6 (c)) has elapsed, the number of communications with the server 20 can be reduced, and as a result, the power consumption can be reduced.

On the other hand, the server 20 can receive the positioning basic information 276 from the terminal 50, measure the position of the terminal 50, and generate the positioning position information 158 (see FIG. 4).
Then, the terminal 50 can acquire the positioning position information 158 through communication with the server 20. That is, the terminal 50 can acquire the positioning position information 158 corresponding to the generated positioning basic information 176.
Thereby, in the server positioning type positioning system, the terminal 50 can acquire the positioning position information 158 corresponding to the generated positioning basic information 176 while reducing power consumption.

The terminal 50 further stores a moving speed information generation program 226 in the terminal first storage unit 210 as shown in FIG. The movement speed information generation program 226 is information for the terminal control unit 200 to generate movement speed information 286 indicating the movement speed of the terminal 50. That is, the movement speed information generation program 226 and the terminal control unit 200 are examples of movement speed information generation means.
The terminal control unit 200 generates the moving speed information 286 by the speed sensor 70 (see FIG. 3), for example, based on the moving speed information generation program 226.
The terminal control unit 200 stores the generated moving speed information 286 in the terminal third storage unit 270.

  As shown in FIG. 5, the terminal 50 stores a positioning basic information transmission interval time change generation program 228 in the terminal first storage unit 210. In the positioning basic information transmission interval time changing program 228, the terminal control unit 200 transmits the positioning basic information transmission interval time (see FIG. 6C) corresponding to the moving speed indicated in the moving speed information 286 described above. This is information for changing the interval time. That is, the positioning basic information transmission interval time changing program 228 and the terminal control unit 200 are examples of transmission interval time changing means.

The terminal 50 generates the movement speed information 286, and changes the positioning basic information transmission interval time (see FIG. 6C) corresponding to the movement speed indicated in the movement speed information 286. For example, the positioning basic information transmission interval time is set longer as the moving speed is slower. The slower the moving speed of the terminal 50, the smaller the difference between the position indicated by the positioning position information 284 (see FIG. 5) acquired by the terminal 50 last time and stored in the terminal third storage unit 270 and the current position. Therefore, the validity of using the position indicated by the positioning position information 284 as the current position is high.
In this regard, when the moving speed is low, the terminal 50 transmits the positioning basic information 276 to the server 20 and does not newly acquire the positioning position information 158 (see FIG. 4). Since the positioning position information 284 stored in the storage unit 270 is used as the current position, it is possible to use the positioning position information 284 with high validity while further reducing power consumption.

The above is the configuration of the positioning system 10 of the present embodiment. Hereinafter, an example of the operation will be described mainly using FIG.
The terminal 50 is initially set to the normal mode 252b, but will be described below on the assumption that the remaining battery level is less than the remaining battery level threshold.

FIG. 7 is a schematic flowchart showing an operation example of the positioning system 10 of the present embodiment.
First, the terminal 50 requests the assist data 156 (see FIG. 4) from the server 20 (step ST1 in FIG. 7), receives the assist data 156 from the server 20 (step ST2), and receives the assist data 274 as the assist data 274. 3 is stored in the storage unit 270 (see FIG. 5).

Subsequently, the terminal 50 receives the signal S1 and the like from the GPS satellite 12a and the like using the assist data 274 (step ST3).
Subsequently, the terminal 50 analyzes the signal S1 and the like, and generates positioning basic information 276 (step ST4). This step ST4 is an example of a positioning basic information generation step.

Subsequently, the terminal 50 generates battery remaining amount information 278 (see FIG. 5) (step ST5). This step ST5 is an example of a battery remaining amount information generating step.
Subsequently, the terminal 50 determines whether or not the remaining battery level indicated in the remaining battery level information 278 is less than the operation mode switching threshold (see FIG. 6B) (step ST6). This step ST6 is an example of a remaining battery level determining step.

Subsequently, the terminal 50 determines that the remaining battery level is less than the operation mode switching threshold, and sets the operation mode to the power saving mode 252b (see FIG. 6A) (step ST61). This step ST61 is an example of an operation mode setting step.
In the power saving mode 252b, the terminal 50 stores the generated positioning basic information 276 in the terminal third storage unit 270 without immediately transmitting it to the server 20 (step ST62).

  Subsequently, the terminal 50 determines whether or not the positioning basic information transmission interval time (see FIG. 6C) has elapsed since the time when the previous positioning basic information 276 was transmitted to the server 20 (step ST63). This step ST63 is an example of a transmission interval time elapsed determination step.

  Subsequently, the terminal 50 determines whether or not the positioning basic information 276 is stored in the terminal third storage unit 270 (step ST8). In the power saving mode 252b, since the positioning basic information 176 is stored, the stored positioning basic information 276 is transmitted to the server 20, and the positioning basic information 276 stored in the terminal third storage unit 270 is deleted. (Step ST81). This step ST81 is an example of an interval time positioning basic information transmission step.

When terminal 50 transmits positioning basic information 276 to server 20, positioning basic information transmission time information 282 is generated (step ST10).
Subsequently, the terminal 50 receives the positioning position information 158 from the server 20 (step ST11), and stores it in the terminal third storage unit 270 as the positioning position information 284 (see FIG. 5). This step ST11 is an example of a positioning result information receiving step.

  Subsequently, the terminal 50 determines whether or not to continuously generate the positioning basic information 276 (step ST12). If the terminal 50 does not generate the positioning basic information 276 continuously, the terminal 50 stores the positioning information in the terminal third storage unit 270. It is determined whether basic information 276 is stored (step ST13). If the positioning basic information 276 is not stored in the terminal third storage unit 270, the processing ends as it is.

  In step ST6 described above, when the terminal 50 determines that the remaining battery level is equal to or greater than the operation mode switching threshold, the operation mode is maintained in the normal mode 252a (see FIG. 6A). In step ST13, if there is the positioning basic information 276 stored in the terminal third storage unit 270, all the positioning basic information 276 is transmitted to the server 20 and the positioning basic information 276 stored in the terminal third storage unit 270 is deleted. (Step ST131).

  In this manner, the terminal 50 acquires the positioning position information 158 (see FIG. 4) corresponding to the generated positioning basic information 276 (see FIG. 5) while reducing the power consumption, and the positioning position information 282 (see FIG. 4). Can be stored as

(Second Embodiment)
Next, a second embodiment will be described.
The configuration of the positioning system 10A (see FIG. 1) in the second embodiment is similar to that of the positioning system 10 in the first embodiment, so the common parts are denoted by the same reference numerals and the like. Omitted, the following description will focus on the differences.

FIG. 8 is a schematic diagram illustrating a main software configuration of the terminal 50A (see FIG. 1) according to the second embodiment.
FIG. 9 is a diagram illustrating an example of the communication limit value information 258.
As illustrated in FIG. 8, unlike the terminal 50 of the first embodiment, the terminal 50 </ b> A stores a battery remaining amount communication limit value determination program 223 in the terminal first storage unit 210. The battery remaining amount communication limit value determination program 223 is a communication limit value stored in the terminal second storage unit 250 by the terminal control unit 200 in the power saving mode 252b (see FIG. 6A). This is information for determining whether or not the communication limit value (see FIG. 9) indicated by the information 256 is reached.

  The above-described communication limit value is a limit battery remaining amount at which the terminal 50 can communicate with the server 20 (see FIG. 1). This communication limit value is 20% in the full charge ratio of the battery 68 (see FIG. 3), for example. The remaining battery level of the communication limit value is an example of the remaining communication limit battery level. The above-mentioned battery remaining amount communication limit value determination program 223 and the terminal control unit 200 are examples of communication limit battery remaining amount determination means.

The terminal control unit 200 of the terminal 50A, based on the positioning basic information transmission program 224A,
When the above-mentioned battery remaining amount communication limit value determination program 223 determines that the battery remaining amount is the communication limit value (see FIG. 9), the positioning basic information 276 (see FIG. 5) is transmitted to the server 20. .

For example, the terminal 50A continues to store the positioning basic information 276 when the battery remaining amount is greater than the communication limit value described above. When terminal 50A determines that the remaining battery level is the communication limit value, terminal 50A transmits positioning basic information 276 to server 20.
For this reason, since the communication frequency between the terminal 50A and the server 20 is, for example, one, it is possible to reduce power consumption due to the terminal 50A communicating with the server 20 to a minimum.

  As illustrated in FIG. 8, the terminal 50 </ b> A further stores a battery remaining amount recovery confirmation program 230 in the terminal first storage unit 210. The battery remaining amount recovery confirmation program 230 is stored by the terminal control unit 200 when the battery remaining amount shifts from less than the operation mode switching threshold value (see FIG. 6B) to the operation mode switching threshold value or more. This is information for transmitting the basic information 276 to the server 20.

When the remaining battery level shifts from less than the operation mode switching threshold value to the operation mode switching threshold value or more, the battery 68 (see FIG. 3) is being charged. Therefore, there is no problem that the battery runs out even when the terminal 50A consumes power.
In this regard, the terminal 50 </ b> A transmits the stored positioning basic information 276 to the server 20 when the remaining battery level shifts from less than the operation mode switching threshold to more than the operation mode switching threshold.
As a result, the terminal 50A determines that the problem of battery depletion has been resolved, acquires the positioning position information 158 (see FIG. 4) corresponding to the generated positioning basic information 276, and acquires the positioning position information 284 (FIG. 4). 8) can be stored in the terminal third storage unit 270.

  As illustrated in FIG. 8, the terminal 50 </ b> A further stores a communication limit value changing program 232 in the terminal first storage unit 210. The communication limit value change program 232 is information for the terminal control unit 200 to change the communication limit value (see FIG. 9) according to the amount of the positioning basic information 276 stored. That is, the communication limit value change program 232 and the terminal control unit 200 are examples of a communication limit battery remaining amount change unit.

The larger the amount of positioning basic information 276 stored in the terminal 50A, the more battery remaining indicated in the communication limit value is necessary.
In this regard, the terminal 50A changes the communication limit value according to the amount of the positioning basic information 276 stored. For example, the larger the amount of positioning basic information 276, the larger the communication limit value is set.
Thereby, even if the amount of the stored positioning basic information 176 is large, the terminal 50 </ b> A can reliably transmit all the stored positioning basic information 276 to the server 20. Then, the positioning position information 158 (see FIG. 4) corresponding to all the stored positioning basic information 276 can be acquired and stored as the positioning position information 284 in the terminal third storage unit 270 (see FIG. 8). .

  The above is the configuration of the positioning system 10A of the second embodiment. Hereinafter, an example of the operation will be mainly described with reference to FIG. 10, focusing on differences from the positioning system 10 of the first embodiment. To do.

FIG. 10 is a schematic flowchart illustrating an operation example of the positioning system 10A according to the second embodiment.
As illustrated in FIG. 10, the terminal 50A determines whether or not the remaining battery level is the communication limit value in the power saving mode 252b (see FIG. 6A) (step ST63A). This step ST63A is an example of a communication limit battery remaining amount determination step.
When terminal 50A determines in step ST63A described above that the remaining battery level is the communication limit value, and further determines that positioning basic information 276 is stored (step ST8), terminal 50A asks server 20 to The positioning basic information 276 is transmitted (step ST81A). This step ST81A is an example of a communication limit battery remaining amount positioning basic information transmission step.

  Thus, since the communication frequency between the terminal 50A and the server 20 is, for example, one degree, the power consumption by the terminal 50A communicating with the server 20 can be reduced to the minimum.

(About programs and computer-readable recording media)
Positioning basic information generating step, battery remaining amount information generating step, battery remaining amount determining step, operation mode setting step, transmission interval time lapse determining step, interval time positioning basic information transmitting step And a positioning result information reception step, a communication limit battery remaining amount determination step, a communication limit battery remaining amount positioning basic information transmission step, and the like.
Moreover, it can also be set as the computer-readable recording medium etc. which recorded the control program etc. of such a terminal device.

  A program storage medium used for installing the control program of the terminal device in the computer and making it executable by the computer is, for example, a floppy disk such as a floppy (registered trademark), a CD-ROM (Compact Disc Read Only). Semiconductor memory in which programs are temporarily or permanently stored as well as package media such as Memory, CD-R (Compact Disc-Recordable), CD-RW (Compact Disc-Rewriterable), DVD (Digital Versatile Disc), etc. It can be realized with a magnetic disk or a magneto-optical disk.

  The present invention is not limited to the embodiments described above. Furthermore, the above-described embodiments may be combined with each other.

It is the schematic which shows the positioning system which concerns on embodiment of this invention. It is the schematic which shows the main hardware constitutions of a server. It is the schematic which shows the main hardware constitutions of a terminal. It is the schematic which shows the main software structures of a server. It is the schematic which shows the main software structures of a terminal. It is a figure which shows an example of operation mode information etc. It is a schematic flowchart which shows the operation example of the positioning system of this Embodiment. It is the schematic which shows the main software structures of the terminal of 2nd Embodiment. It is a figure which shows an example of communication limit value information. It is a schematic flowchart which shows the operation example of a positioning system.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10, 10A ... Positioning system, 12a, 12b, 12c, 12d ... GPS satellite, 20 ... Server, 40 ... Base station, 45 ... Internet network, 112 ... Assist data generation program 116 ... Positioning calculation program, 212 ... Assist data request program, 214 ... Positioning basic information generation program, 216 ... Battery remaining amount information generation program, 218 ... Operation mode switching threshold battery remaining amount Comparison program, 220 ... operation mode switching program, 222 ... positioning basic information transmission interval time judgment program, 223 ... battery communication limit value judgment program, 224, 224A ... positioning basic information transmission program, 226 ..Movement speed information generation program, 228 ... Positioning basic information transmission interval time change Program, 230 ... remaining battery capacity recovery confirmation program, 232 ... communication limit value changing program

Claims (8)

A terminal device for receiving a position-related signal from a position information satellite;
A positioning calculation device capable of communicating with the terminal device;
A positioning system having
The terminal device
Positioning basic information generating means for generating positioning basic information used by the positioning calculation device for positioning calculation based on the position-related signal from the position information satellite;
Stores normal mode for transmitting the positioning basic information to the positioning calculation device each time the positioning basic information is generated, and operation mode information indicating a power saving mode for storing the positioning basic information after generating the positioning basic information. Operation mode information storage means;
Battery remaining amount information generating means for generating battery remaining amount information indicating the remaining battery amount of the terminal device;
Battery remaining amount determining means for determining whether the battery remaining amount is within a normal mode compatible range corresponding to the normal mode or a power saving mode compatible range corresponding to the power saving mode;
Based on the determination result of the remaining battery level determination means, an operation mode setting means for setting the normal mode or the power saving mode;
In the power saving mode, a transmission interval time elapse determination is performed to determine whether or not a transmission interval time has elapsed from when the positioning basic information was transmitted to the positioning calculation device last time until the next time the positioning basic information is transmitted. Means,
Based on the determination result of the transmission interval time elapse determining means, interval time positioning basic information transmitting means for transmitting the positioning basic information to the positioning calculation device;
Have
The positioning calculation device
Positioning basic information receiving means for receiving the positioning basic information from the terminal device;
Based on the positioning basic information, positioning calculation means for positioning the position of the terminal device,
Positioning result information transmitting means for transmitting positioning result information indicating a positioning result by the positioning calculation means to the terminal device;
A positioning system characterized by comprising: A terminal device that receives a position-related signal from a position information satellite,
Based on the position related signal from the position information satellite, a positioning basic information generating means for generating positioning basic information to be used for positioning calculation by a positioning calculation device capable of communicating with the terminal device;
Stores normal mode for transmitting the positioning basic information to the positioning calculation device each time the positioning basic information is generated, and operation mode information indicating a power saving mode for storing the positioning basic information after generating the positioning basic information. Operation mode information storage means;
Battery remaining amount information generating means for generating battery remaining amount information indicating the remaining battery amount of the terminal device;
Battery remaining amount determining means for determining whether the battery remaining amount is within a normal mode compatible range corresponding to the normal mode or a power saving mode compatible range corresponding to the power saving mode;
Based on the determination result of the remaining battery level determination means, an operation mode setting means for setting the normal mode or the power saving mode;
In the power saving mode, a transmission interval time elapse determination is performed to determine whether or not a transmission interval time has elapsed from when the positioning basic information was transmitted to the positioning calculation device last time until the next time the positioning basic information is transmitted. Means,
Based on the determination result of the transmission interval time elapse determining means, interval time positioning basic information transmitting means for transmitting the positioning basic information to the positioning calculation device;
Positioning result information receiving means for receiving positioning result information generated by the positioning calculation device based on the positioning basic information;
The terminal device characterized by having. Moving speed information generating means for generating moving speed information indicating the moving speed of the terminal device;
Transmission interval time changing means for changing the transmission interval time corresponding to the moving speed;
The terminal device according to claim 2, comprising: A terminal device that receives a position-related signal from a position information satellite,
Based on the position related signal from the position information satellite, a positioning basic information generating means for generating positioning basic information to be used for positioning calculation by a positioning calculation device capable of communicating with the terminal device;
Operation mode information storage means for storing operation mode information indicating a normal mode for transmitting the positioning basic information to the positioning calculation device each time it is generated, and a power saving mode for storing the positioning basic information after generating the positioning basic information When,
Battery remaining amount information generating means for generating battery remaining amount information indicating the remaining battery amount of the terminal device;
Battery remaining capacity determining means for determining whether the battery remaining capacity is within a normal mode compatible range corresponding to the normal mode or a power saving mode compatible range corresponding to the power saving mode;
Based on the determination result of the remaining battery level determination means, an operation mode setting means for setting the normal mode or the power saving mode;
In the power saving mode, a communication limit battery remaining amount corresponding determination means for determining whether the battery remaining amount is a communication limit battery remaining amount that is a limit battery remaining amount capable of communicating with the positioning calculation device;
Based on the determination result of the communication limit battery remaining amount determination means, the communication limit battery remaining amount positioning basic information transmission means for transmitting the positioning basic information to the positioning calculation device;
Positioning result information receiving means for receiving positioning result information generated by the positioning calculation device based on the positioning basic information;
The terminal device characterized by having.   The terminal device according to claim 4, further comprising a communication limit battery remaining amount changing unit configured to change the communication limit battery remaining amount according to the amount of the positioning basic information stored.   When the battery remaining amount shifts from the power saving mode compatible range to the normal mode compatible range, the stored basic positioning information is transmitted to the positioning calculation device. The terminal device according to any one of claims 2 to 5. On the computer,
Based on the position related signal from the position information satellite, the terminal device that receives the position related signal from the position information satellite uses positioning basic information to be used for positioning calculation by the positioning calculation device that can communicate with the terminal device. A positioning basic information generation step to be generated;
A battery remaining amount information generating step in which the terminal device generates battery remaining amount information indicating a remaining battery amount of the terminal device;
After the terminal device generates the positioning basic information, the remaining battery level is within a normal mode compatible range corresponding to a normal mode in which the positioning basic information is transmitted to the positioning calculation device each time the positioning basic information is generated. A remaining battery level determining step for determining whether the power saving mode corresponding range corresponds to the power saving mode for storing the positioning basic information;
When the terminal device determines in the battery remaining amount determining step that the remaining battery amount is within the power saving mode compatible range, an operation mode setting step for setting the power saving mode;
The transmission interval time from when the terminal device transmits the positioning basic information to the next time the positioning basic information is transmitted to the positioning calculation device that can communicate with the terminal device in the power saving mode has elapsed. A transmission interval time elapsed determination step for determining whether or not,
When the terminal device determines in the transmission interval time elapse determination step that the transmission interval time has elapsed since the previous transmission of the positioning basic information, the terminal device transmits the positioning basic information to the positioning calculation device. Interval time positioning basic information transmission step to perform,
The terminal device receives positioning result information received by the positioning calculation device based on the positioning basic information, positioning result information receiving step;
A control program for a terminal device, characterized in that On the computer,
Based on the position related signal from the position information satellite, the terminal device that receives the position related signal from the position information satellite uses positioning basic information to be used for positioning calculation by the positioning calculation device that can communicate with the terminal device. A positioning basic information generation step to be generated;
A battery remaining amount information generating step in which the terminal device generates battery remaining amount information indicating a remaining battery amount of the terminal device;
After the terminal device generates the positioning basic information, the remaining battery level is within a normal mode compatible range corresponding to a normal mode in which the positioning basic information is transmitted to the positioning calculation device each time the positioning basic information is generated. A remaining battery level determining step for determining whether the power saving mode corresponding range corresponds to the power saving mode for storing the positioning basic information;
When the terminal device determines in the battery remaining amount determining step that the remaining battery amount is within the power saving mode compatible range, an operation mode setting step for setting the power saving mode;
A communication limit battery for determining whether or not the battery remaining amount is a communication limit battery remaining amount that is a limit battery remaining amount with which the terminal device can communicate with the positioning calculation device in the power saving mode. A remaining amount determination step;
When the terminal device determines in the communication limit battery remaining amount corresponding determination step that the battery remaining amount is within the communication limit battery remaining amount range, the terminal device provides the positioning basic information to the positioning calculation device. Transmitting communication limit battery remaining amount positioning basic information transmission step,
The terminal device receives positioning result information received by the positioning calculation device based on the positioning basic information, positioning result information receiving step;
A control program for a terminal device, characterized in that

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