JP2001255365A - Detection system for position of mobile station - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a detection system, for the position of a mobile station, by which the position on the latitude and the longitude of the mobile station can be displayed on a car navigation apparatus easily and without increasing a system constitution. SOLUTION: The detection system comprises the car navigation apparatus 1 with a communication function. The system comprises a first portable telephone set 2. The system comprises a second portable telephone set 13 which is connected to the apparatus 1 with the communication function. The system comprises a server SV which is connected to a public network N. The system compress a plurality of base stations 4 which can communication with the telephone set 2. The system comprises a car-navigation-side base station 3 which can communicate with the telephone set 13. The telephone 2 transmits IDs of the plurality of base stations and receiving field strengths of radio waves of the plurality of base stations to the telephone set 13. The telephone set 13 transmits the transmitted IDs and the receiving field strengths to the server, and it receives latitude and longitude information on the telephone set 2. The car navigation apparatus receives the latitude and longitude information from the telephone set 13 so as to be displayed on a display device.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to communication between a car navigation device with a communication function, a mobile station, a portable telephone connected to the car navigation device, a server connected to a public network, and a mobile station. The present invention relates to a mobile station position detection system having a plurality of possible base stations and a car navigation-side base station capable of communicating with a portable telephone.

[0002]

2. Description of the Related Art In recent years, with the spread of portable telephones such as PHS telephones, applications for notifying the current position of a user using the portable telephone have been expanding, and the convenience of a system for detecting the current position of the portable telephone has been increasing. It is expected to improve the performance.

A system for detecting the current position of such a portable telephone is disclosed, for example, in JP-A-11-17803.
No. 9 discloses this. In this publication, a plurality of (usually a PHS telephone) are transmitted from a mobile station (for example, a PHS telephone) via a public network in a center station in which an ID for identifying a base station and latitude and longitude information indicating the position of the base station are registered. And (3) the base station ID and the received electric field strength of each base station radio wave are acquired, and the position of the mobile station on the latitude and longitude is detected based on the acquired data and the latitude and longitude information. .

[0004]

However, in the conventional mobile station position detecting system comprising the above-mentioned center station, the position of the mobile station in the latitude and longitude is detected. In order to know the location on the latitude and longitude of the mobile station, it is necessary to call the center station to hear the location or to have it transmitted by facsimile, it is difficult to know the location of the mobile station on the latitude and longitude clearly. Yes,
Further, it is necessary to visually recognize the information using a facsimile or the like in order to know it clearly, and there is a problem that operation and arrangement are difficult in a car or the like.

In this mobile station position detection system, the position of the mobile station, such as a PHS telephone, is displayed on the display device of the car navigation device on the latitude and longitude, so that the position of the mobile station can be visually recognized easily without increasing the system configuration. Is required.

SUMMARY OF THE INVENTION An object of the present invention is to provide a mobile station position detecting system capable of displaying the position on a latitude and longitude of a mobile station on a car navigation device easily and without increasing the system configuration in order to satisfy these requirements. And

[0007]

In order to solve the above-mentioned problems, a mobile station position detecting system according to the present invention comprises a car navigation device with a communication function, a first portable telephone as a mobile station, and a car navigation device. A connected second portable telephone, a server connected to the public network, a plurality of base stations capable of communicating with the first portable telephone, and capable of communicating with the second portable telephone. A mobile station position detection system having a car navigation side base station, wherein the first portable telephone receives IDs for identifying a plurality of base stations detected by receiving radio waves from a plurality of base stations and a plurality of base stations. To the second portable telephone, and the second portable telephone transmits the ID and the received electric field strength transmitted from the first portable telephone to the car navigation base station. Sent to the server via Receives the latitude / longitude information indicating the latitude / longitude at which the first mobile phone is located from the server, and the car navigation device has a configuration to receive the latitude / longitude information from the second mobile phone and display it on the display device. .

Thus, a mobile station position detecting system capable of displaying the position on the latitude and longitude of the mobile station on the car navigation device easily and without increasing the system configuration is obtained.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A mobile station position detecting system according to a first aspect of the present invention is connected to a car navigation device with a communication function, a first portable telephone as a mobile station, and a car navigation device. A second mobile phone;
Mobile station position detection having a server connected to a public network, a plurality of base stations capable of communicating with a first portable telephone, and a car navigation base station capable of communicating with a second portable telephone. A first portable telephone that receives an electric wave from a plurality of base stations and detects an ID for identifying the plurality of base stations and a received electric field strength of the electric wave from the plurality of base stations in a second manner; To the mobile phone of the second, the second mobile phone,
The ID and the received electric field strength transmitted from the first mobile phone are transmitted to the server via the car navigation side base station, so that the latitude and longitude information indicating the latitude and longitude where the first mobile phone is located is transmitted from the server. Upon receipt, the car navigation device receives the latitude and longitude information from the second portable telephone and displays the information on the display device.

With this configuration, the second portable telephone can
Based on a plurality of base station IDs and a plurality of base station reception electric field strengths received from the first portable telephone (mobile station), it is possible to acquire the latitude and longitude information of the mobile station from the server and transmit the information to the car navigation device. Since the car navigation device can receive the latitude and longitude information of the mobile station, the car navigation device has an effect that the mobile station can be displayed on the display device.

According to a second aspect of the present invention, there is provided the mobile station position detecting system according to the first aspect, wherein the first portable telephone sets the history information with the position information as the history information including the position information. First determining means for determining the presence or absence of a transmission instruction, and transmitting means for transmitting history information with position information to the second portable telephone when the determining means determines that there is a transmission instruction. And a second portable telephone, a second determination unit for determining whether or not history information with position information is received, a registration unit for registering history information with position information in a history memory, and a registration unit in the history memory. Display means for displaying a list of history information with positional information on a display unit, and designation of specifying history information with positional information to be converted into latitude / longitude information from among the historical information with positional information listed Means, Conversion means for converting the position information of the determined history information with position information into latitude / longitude information via a server and then registering the information in a history memory, wherein the car navigation device sends a predetermined number of History information requesting means for requesting and receiving history information, third determining means for determining whether or not history information with position information is included in a predetermined number of history information, and third determining means. A conversion request unit for requesting the second portable telephone to perform conversion if the position information of the determined history information with position information has not been converted to latitude and longitude information; and a latitude and longitude of the history information with position information. Second display means for displaying the position of the first portable telephone on the display device based on the information.

According to this configuration, the history information with position information acquired from the first portable telephone as a mobile station is registered in the second portable telephone, and the car navigation device is registered in the second portable telephone. There is an effect that the history information with position information can be requested and displayed on the display device when necessary, and in the case of history information without latitude and longitude information, conversion to latitude and longitude information can be requested.

According to a third aspect of the present invention, in the mobile station position detecting system according to the first or second aspect, the second display means displays the position of the first portable telephone together with the position of the first portable telephone. The vehicle position is displayed.

This configuration has the effect that the positional relationship between the mobile station and the vehicle can be known.

According to a fourth aspect of the present invention, in the mobile station position detecting system according to the first or second aspect, the second display means enlarges the position of the first portable telephone. And display it.

According to this configuration, the position of the mobile station is shown in an enlarged manner, and the position of the mobile station can be clearly recognized.

According to a fifth aspect of the present invention, in the mobile station position detecting system according to the first or second aspect, the second display means includes a position of the first portable telephone and a position of the first portable telephone. The error range is also displayed.

This configuration has an effect that the range of a certain position of the mobile station can be visually recognized.

According to a sixth aspect of the present invention, in the mobile station position detecting system according to the first or second aspect, the second display means displays the position of the first portable telephone and the position of the first portable telephone. The route from the car position is displayed.

This configuration has the effect of facilitating traveling to a certain position of the mobile station.

Hereinafter, an embodiment of the present invention will be described with reference to FIG.
This will be described with reference to FIGS.

(Embodiment) FIG. 1 is a block diagram showing a general mobile station position detecting system.

In FIG. 1, 1 is a car navigation device with a communication function, 2 is a first portable telephone (for example, a PHS telephone) as a mobile station, 2a is an antenna of the first portable telephone 2, and 3 is a later-described antenna. A base station (car navigation side base station) capable of communicating with the second portable telephone 13; 3a is an antenna of the base station 3; 4 is a plurality of base stations; 4a is an antenna of the base station 4; A second portable telephone (for example, a PHS telephone) connected to the car navigation device 1, 13a is an antenna of the portable telephone, and 13b is a first portable telephone.
A history memory for registering the history information with the position information received from the portable telephone 2; 13c, a display unit for displaying the history information with the position information; N, a public network; and SV, a server connected to the public network N.

FIG. 2 is a block diagram showing the car navigation system 1 with a communication function.

In FIG. 2, reference numeral 5 denotes an input device for inputting an operation command or the like by a user, 6 a CPU (central processing unit) for controlling the operation of a car navigation device, and 7 a navigation radio wave from a GPS satellite. The antenna 8 is a GP that measures the position of the own vehicle by GPS and outputs it as own vehicle position information.
The S receiver 9 detects the speed of the own vehicle and the inclination of the left and right, and detects GPS.
A self-contained navigation unit that can measure the position of the vehicle even in tunnels that cannot receive navigation radio waves from artificial satellites,
10 is an input from the GPS receiver 8 and the self-contained navigation unit 9
Interface unit (I / F unit) for synthesizing an input from the CPU 6 and converting the data into data that can be input to and output from the CPU 6, a speaker 11, a voice output control device 12 for controlling a voice output based on a command from the CPU 6, 13 Is a second portable telephone similar to FIG. 1, 13a is an antenna of the second portable telephone 13, 13b is a history memory similar to FIG. 1, and 13c is FIG.
A communication control device for controlling transmission and reception of data based on a command from the CPU 6; an antenna 15 for transmitting and receiving FM signals; 16 an FM tuner; 17 an FM multiplexing IC for multiplexing FM signals; A ROM 18 stores a program for controlling the CPU 6 and graphic data to be displayed on a display device 24, which will be described later.
R for storing data and the like generated temporarily during the operation of Step 6
AM and 20 are CD-ROM drives for reading and outputting information recorded on a CD-ROM 21 described later, 21 is a CD-ROM (read-only compact disk memory) for recording map information and the like, and 22 is an input. A graphic controller 23 for performing a screen display process of a display device 24 described later based on image information and the like, a video RAM 23 for temporarily storing image data inputted from the graphic controller 22 and displayed on the display device 22, and a CPU 24 for displaying a processing result by the CPU 6 A display device for outputting, 25 is an input device 5,
CPU 6, interface unit 10, audio output control device 1
2. Communication control device 14, FM multiplex IC 17, ROM1
8, a bus line commonly connected to the RAM 19, the CD-ROM drive 20, and the graphic controller 22. In FIG. 2, the car navigation system 1 with a communication function is a part excluding the first portable telephone 2.

In FIG. 1 and FIG. 2, the second portable telephone 13 is connected to a communication control device 14 of the car navigation device 1 with a communication function.
And can communicate with the server 1 via the base station 3 and the public network N. On the other hand, the first portable telephone 2 can communicate with the second portable telephone 13 via the base station 4, the public network N, and the base station 3. Each of the portable telephones 2 and 13 can receive an ID indicating the identification of the base station from the base station 4 or 3, and receives a reception electric field strength (RSSI) which is a reception strength of a radio wave from the base station 4 or 3. Detection is possible. Further, the server SV
Registers the IDs and latitude / longitude information of the base stations 3 and 4, and receives the radio waves from the base stations by acquiring the IDs of the base stations 3 and 4 and the reception electric field strength of the base station radio waves. The latitude and longitude information of the mobile station (here, the first portable telephone 2) can be obtained.

FIG. 3A is a functional block diagram showing a function realizing means of the first portable telephone 2, and FIG. 3B is a functional block diagram showing a function realizing means of the second portable telephone 13. FIG. 3C is a functional block diagram showing the function realizing means of the central processing unit (CPU) 6.

In FIG. 3, reference numeral 201 denotes first determination means for determining the presence or absence of an instruction to transmit history information with position information, which is history information including position information. Is transmission means for transmitting the history information with position information to the second portable telephone 13 when it is determined. Also, 131 is a second determination unit that determines whether history information with position information is received, 132 is a registration unit that registers history information with position information in the history memory 13b,
133 is first display means for displaying a list of history information with position information registered in the history memory 13b on the display unit 13c;
Reference numeral 134 denotes designation means for designating the history information with position information to be converted into the latitude / longitude information from the history information with position information displayed in a list. This is conversion means for converting into latitude / longitude information via the .NET and registering it in the history memory 13b. Further, reference numeral 61 denotes history information request means for requesting and receiving a predetermined number of history information from the second portable telephone 13;
Reference numeral 2 denotes third determination means for determining whether or not history information with position information is included in the predetermined number of pieces of history information, and 63 is a selection means for selecting history information with position information from the predetermined number of pieces of history information. , 64 request the second portable telephone 13 to perform conversion if the position information of the history information with position information determined to be present by the third determination means 62 has not been converted into latitude and longitude information yet. The conversion request unit 65 is a second display unit that displays the position of the first portable telephone 2 on the display device 24 based on the latitude and longitude information of the history information with position information.
In FIG. 3, the first determining unit 201 and the transmitting unit 202
Is a function realizing unit realized by executing a storage program by a CPU (not shown) of the portable telephone 2 of the first embodiment.
PUs (not shown) execute the stored programs, and the function realizing means are realized by the central processing unit 6 of the car navigation device 1 with the communication function.
This is a function realizing means realized by executing a program stored in M18.

The operation of the mobile station position detecting system thus configured will be described with reference to FIGS. FIG. 4 is a flowchart showing the operation of the first portable telephone 2 as a mobile station, FIGS. 5 and 6 are flowcharts showing the operation of the second portable telephone 13, and FIG. 7 is a car navigation device with a communication function. 3 is a flowchart showing the operation of FIG.

In FIG. 4, the first determination means 201 of the first portable telephone 2 sends history information with position information including the base station ID and the received electric field strength of the base station radio wave to the second portable telephone 13. It is determined whether transmission has been instructed (S1). If it is determined that there is a transmission instruction, the transmitting unit 2
02 is the history information with position information stored in the second portable telephone 13.
(S2). As a result, for example, by pressing a transmission instruction button (not shown) of the first portable telephone 2, the history information with position information is transferred to the second portable telephone 1.
3 can be transmitted.

Next, referring to FIG. 5, the second portable telephone 1
The second determination means 131 determines whether or not history information with position information has been received (S11). If it is determined that the history information with position information has been received, the registration means 132 stores the received history information with position information in the history memory 13b. Register (S12). The history information with position information registered in the history memory 13b includes the base station ID and the received electric field strength of the base station radio wave, and may also include the latitude and longitude information of the first portable telephone 2 as a mobile station. is there. That is, the history information with position information may or may not include the latitude and longitude information of the mobile station. In addition, when simply referred to as position information, it means base station ID information and received electric field strength information of base station radio waves.

Next, an operation of converting the position information into the latitude and longitude information in the second portable telephone 13 will be described with reference to FIG.

In FIG. 6, first, in response to a display instruction using, for example, a push button, the first display means 133 displays a list of history information (S21). Some of the history information includes only call history information and does not include position information. Next, the specifying unit 134 specifies the history information with position information whose position information is to be converted into the latitude / longitude information from the history information displayed in a list (S22). Next, the conversion means 135 transmits a message requesting conversion of the position information (designated position information) of the designated history information with position information to the server SV via the base station 3 and the public network N together with the designated position information ( S23) After the designated position information is converted into the latitude / longitude information by the server SV, the latitude / longitude information transmitted from the server SV is received (S24) and registered in the history memory 13b (S25). The first display unit 133 displays the received latitude / longitude information (S26).

Next, the operation of the car navigation device 1 with a communication function will be described with reference to FIG.

In FIG. 7, first, for example, in response to an instruction from the input device 5, the history information requesting unit 61 transmits a predetermined number (for example, 10) of history information to the second portable telephone (car navigation telephone) 13. Request (S31), and receive a predetermined number of pieces of history information from the second portable telephone 13 (S3).
2). Next, the third determination unit 62 determines whether or not the predetermined number of pieces of history information includes history information with position information (S33). If it is determined that there is no history information with position information, this processing ends. When it is determined that there is history information with position information, the selection unit 63 causes the display device 24 to display the history information with position information (S34), and selects the history information with position information for which the position on the latitude and longitude is to be displayed (S34). S
35). Next, the third determination means 62 determines whether or not the end button has been pressed (S36), and terminates this processing if it is determined that the end button has been pressed. If it is determined that the button has not been pressed, the third determination unit 62 determines whether or not the position information (selected position information) of the selected history information with position information has already been converted into latitude and longitude information (S37). .
If the selected position information has already been converted to latitude / longitude information, the second display means 65 displays a map capable of displaying both the position of the mobile station (position detection target telephone) 2 and the position of the own vehicle. (S38), and a mark is displayed at the latitude and longitude indicating the position of the mobile station 2 (S39). With this mark display, the position of the mobile station (first portable telephone) 2 can be visually recognized, and the position can be clearly known.
If it is determined in step S37 that the selected position information has not been converted to the latitude / longitude information, the conversion request unit 64
Requests the second portable telephone 13 to convert the selected position information into the latitude / longitude information (S40), and the second portable telephone 13 that has received this request acquires the information by performing the operation shown in FIG. The latitude and longitude information is transmitted to the car navigation device 1 with the communication function, and the transmitted latitude and longitude information is received by the car navigation device 1 with the communication function (S4).
1). The received latitude and longitude information is stored in the above-described step S38,
It is displayed as shown in S39.

In this embodiment, step S3
8. In S39, both the position of the mobile station 2 and the position of the own vehicle are displayed. However, only the mobile station 2 may be displayed enlarged.

Further, when displaying the position of the mobile station 2, the error range may be displayed together. This can be realized by the server SV transmitting the latitude / longitude information and its reliability data to the second portable telephone 13 together with the number of base stations that the mobile station 2 has received. . For example, when the radio wave of only one base station is received, reliability data is low, and when the radio waves of three base stations are received, reliability data indicating high reliability is transmitted by three-point survey. Based on this data, the car navigation device with communication function 1 displays the position of the mobile station 2 and a circle having a radius of 100 m around the position when the reliability is high, and a radius of 30 m when the reliability is low.
A circle of 0 m is displayed as an error range.

Further, when displaying the position of the mobile station 2, a route from the own vehicle position to the mobile station 2 may be searched, and the searched route may be displayed.

As described above, according to the present embodiment, the first
The portable telephone 2 has a first determination unit 201 that determines whether or not there is an instruction to transmit history information with position information, which is history information including position information, and a first determination unit 201 that determines that there is a transmission instruction. And transmitting means 202 for transmitting the history information with the position information to the second portable telephone 13 in the case where the second portable telephone 13 has received the history information with the position information. A second determining means 131 for performing
A registration unit 132 for registering the history information with position information in the history memory 13b, a first display unit 133 for displaying a list of the history information with position information registered in the history memory 13b on the display unit 13c, Specifying means 134 for specifying the history information with position information to be converted from the history information with position information displayed in a list, and the position information of the specified history information with position information to the latitude / longitude information via the server SV. And a conversion means 135 for registering in the history memory 13b after conversion, and the car navigation device 1 with the communication function requests the history information request means 61 for requesting and receiving a predetermined number of history information from the second portable telephone 13. Third determining means 62 for determining whether or not history information with position information is included in a predetermined number of pieces of history information, and third determining means 62
If the position information of the history information with position information determined to be not yet converted to the latitude / longitude information, the conversion request means 6 requests the second portable telephone 13 to perform the conversion.
4 and the second display means 65 for displaying the position of the first portable telephone 2 on the display device 24 based on the latitude and longitude information of the history information with position information. History information with position information acquired from the first portable telephone 2 as a mobile station is registered in the telephone 13, and the car navigation device 1 with a communication function can be used as the second portable telephone without increasing the configuration. 13 can be requested and displayed on the display device 24 when necessary, and can be requested to be converted to latitude / longitude information in the case of history information without latitude / longitude information. The position on the latitude and longitude of the mobile station 2 can be displayed on the display device 24 of the car navigation device with communication function 1 easily and without increasing the system configuration.

Further, since the second display means 65 displays the position of the own vehicle together with the position of the first portable telephone 2, the positional relationship between the mobile station and the own vehicle can be easily known. .

Further, since the second display means 65 displays the position of the first portable telephone 2 in an enlarged manner, the position of the mobile station 2 can be clearly recognized.

Further, since the second display means 65 displays the error range together with the position of the first portable telephone 2, a certain range of the mobile station 2 can be clearly recognized.

Further, since the second display means 65 displays the route from the position of the own vehicle together with the position of the first portable telephone 2, traveling to the mobile station 2 becomes easy.

[0044]

As described above, according to the mobile station position detecting system according to the first aspect of the present invention, a car navigation device with a communication function, a first portable telephone as a mobile station, and a car navigation system The second connected to the device
Mobile phone, a server connected to the public network,
A plurality of base stations capable of communicating with a portable telephone,
And a car navigation-side base station capable of communicating with the portable telephone of claim 1. The first portable telephone comprises a plurality of base stations that receive and detect radio waves from a plurality of base stations. An ID for identifying a station and the received electric field strength of radio waves from a plurality of base stations are transmitted to a second portable telephone, and the second
The portable telephone of the present invention indicates the latitude and longitude where the first portable telephone is located by transmitting the ID transmitted from the first portable telephone and the received electric field strength to the server via the car navigation base station. Receiving the latitude and longitude information from the server,
The car navigation device receives the latitude and longitude information from the second portable telephone and displays the information on the display device,
The second portable telephone is a first portable telephone (mobile station)
From the server based on the plurality of base station IDs and the plurality of base station reception electric field strengths received from the server, and can transmit the latitude and longitude information of the mobile station to the car navigation device. The received car navigation device has an advantageous effect that the position on the latitude and longitude of the mobile station can be displayed on the display device easily and without increasing the system configuration.

According to the mobile station location detecting system of the second aspect, in the mobile station location detecting system of the first aspect, the first portable telephone is provided with location information which is history information including location information. First determining means for determining whether or not there is a transmission instruction for history information; and transmitting means for transmitting history information with position information to the second portable telephone when the determining means determines that there is a transmission instruction. The second portable telephone has a second determination unit that determines whether history information with position information is received, a registration unit that registers history information with position information in a history memory, First display means for displaying a list of the registered history information with position information on the display unit, and designation of the history information with position information to be converted into latitude / longitude information from the history information with position information displayed in a list. Designated hands And a conversion means for converting the position information of the designated history information with position information into latitude / longitude information via a server, and then registering the information in a history memory. History information requesting means for requesting and receiving a number of pieces of history information, third determining means for determining whether or not history information with position information is included in a predetermined number of pieces of history information, and third determining means. A conversion requesting unit for requesting the second portable telephone to perform conversion if the position information of the history information with position information determined to be present is not yet converted into latitude / longitude information; A second display unit for displaying the position of the first mobile phone on the display device based on the latitude and longitude information, so that the second mobile phone obtains the position from the first mobile phone as a mobile station. Location information History information is registered, the car navigation device 1 can request and display the history information with position information registered in the second portable telephone when necessary, without increasing the configuration, and display the history information on the display device. In the case of history information without latitude / longitude information, conversion to latitude / longitude information can be requested, so that the advantage of being able to display the location of the mobile station on the latitude / longitude easily and without increasing the system configuration is advantageous. Is obtained.

According to the mobile station position detecting system of the third aspect, in the mobile station position detecting system of the first or second aspect, the second display means includes a position of the first portable telephone. Also, by displaying the own vehicle position, an advantageous effect that the positional relationship between the mobile station and the own vehicle can be easily known can be obtained.

According to the mobile station position detecting system of the fourth aspect, in the mobile station position detecting system of the first or second aspect, the second display means includes a position of the first portable telephone. Is enlarged and displayed, the advantageous effect that the position of the mobile station can be clearly recognized is obtained.

According to the mobile station position detecting system according to the fifth aspect, in the mobile station position detecting system according to the first or second aspect, the second display means includes a position of the first portable telephone. In addition, by displaying the error range, an advantageous effect that a certain range of the mobile station can be clearly recognized can be obtained.

According to the mobile station position detecting system of the sixth aspect, in the mobile station position detecting system of the first or second aspect, the second display means displays the position of the first portable telephone. In addition, by displaying the route from the own vehicle position, an advantageous effect of facilitating traveling to the position of the mobile station can be obtained.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing a general mobile station position detection system.

FIG. 2 is a block diagram showing a car navigation device with a communication function.

FIG. 3A is a functional block diagram showing a function realizing means of a first portable telephone; FIG. 3B is a functional block diagram showing a function realizing means of a second portable telephone; FIG. 3C is a functional block diagram of a central processing unit (CPU); Functional block diagram showing function realizing means

FIG. 4 is a flowchart showing the operation of a first portable telephone as a mobile station.

FIG. 5 is a flowchart showing the operation of the second portable telephone.

FIG. 6 is a flowchart showing the operation of the second portable telephone.

FIG. 7 is a flowchart showing the operation of the car navigation device with a communication function.

[Explanation of symbols]

 Reference Signs List 1 car navigation device with communication function 2 first portable telephone (mobile station) 2a, 3a, 4a, 7, 13a, 15 antenna 3, 4 base station 5 input device 6 CPU (central processing unit) 8 GPS receiver 9 Self-contained navigation unit 10 Interface unit (I / F unit) 11 Speaker 12 Audio output control unit 13 Second portable telephone 13b History memory 13c Display unit 14 Communication control unit 16 FM tuner 17 FM multiplex IC 18 ROM 19 RAM 20 CD- ROM drive 21 CD-ROM 22 Graphic controller 23 Video RAM 24 Display device 25 Bus 61 History information request means 62 Third judgment means 63 Selection means 64 Conversion request means 65 Second display means 131 Second judgment means 132 Registration means 133 first display means 134 designation Means 135 Conversion means 201 First determination means 202 Transmission means N Public network SV server

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Takeshi Suzuda 1006 Kazuma Kadoma, Osaka Pref. Matsushita Electric Industrial Co., Ltd. Term (reference) 2F029 AA02 AA07 AB01 AB05 AB07 AB13 AC02 AC04 AC09 AC14 AC18 AC19 AC20 5H180 AA01 BB05 BB13 FF04 FF05 FF22 FF25 FF27 FF40 5J062 AA05 AA08 BB01 CC18 HH04 5K067 AA34 BB04 FF16 FF23 FF23 JJ57 JJ64 KK15 9A001 CC05 HH34 JJ11 JJ77

Claims (6)

[Claims] 1. A car navigation device with a communication function,
A first mobile phone as a mobile station, a second mobile phone connected to the car navigation device, a server connected to a public network, and communication with the first mobile phone are possible. A mobile station position detection system including a plurality of base stations and a car navigation-side base station capable of communicating with the second mobile phone, wherein the first mobile phone is configured to receive a signal from the plurality of base stations. ID for identifying the plurality of base stations detected by receiving radio waves of
And the received electric field strengths of the radio waves from the plurality of base stations to the second portable telephone, wherein the second portable telephone transmits the ID and the ID transmitted from the first portable telephone. By transmitting the received electric field strength to the server via the car navigation-side base station to receive latitude and longitude information indicating the latitude and longitude where the first mobile phone is located, from the server, Receiving the latitude and longitude information from the second portable telephone and displaying it on a display device. 2. The first portable telephone according to claim 1, wherein said first portable telephone determines whether or not there is an instruction to transmit history information with position information, which is history information including position information, and said determination is made that there is an instruction to transmit. Transmitting means for transmitting the history information with the position information to the second portable telephone when the means has determined, the second portable telephone has received the history information with the position information Second determining means for determining whether or not the history information with position information is registered in a history memory, and a first means for displaying a list of history information with position information registered in the history memory on a display unit. Display means, designation means for designating history information with position information to be converted to latitude / longitude information from the list-displayed history information with position information, and position information of the designated history information with position information The sir Conversion means for converting the information into latitude and longitude information via a mobile phone and registering the information in the history memory, wherein the car navigation device requests and receives a predetermined number of pieces of history information from the second portable telephone. Information requesting means, third determining means for determining whether or not history information with position information is included in the predetermined number of pieces of history information, and history with position information determined to be present by the third determining means A conversion requesting unit for requesting the second mobile phone to perform a conversion if the position information of the information has not been converted into the latitude / longitude information; and the conversion request unit based on the latitude / longitude information of the history information with the position information. 2. The mobile station position detecting system according to claim 1, further comprising: a second display means for displaying the position of the portable telephone on the display device. 3. The mobile station position detecting system according to claim 1, wherein the second display means displays the position of the vehicle together with the position of the first portable telephone. 4. The apparatus according to claim 1, wherein said second display means enlarges and displays the position of said first portable telephone.
Alternatively, the mobile station position detection system according to claim 2. 5. The mobile station position detecting system according to claim 1, wherein said second display means displays a position of said first portable telephone together with an error range thereof. 6. The mobile station position detecting device according to claim 1, wherein the second display means displays a route from the own vehicle position together with the position of the first portable telephone. system.