JPH0836044A - Gps device utilizing portable telephone system - Google Patents

Abstract

PURPOSE:To provide a GPS device which has a very high accuracy by utilizing a portable telephone system. CONSTITUTION:A base station 1 is composed of a trunk line data transmitter- receiver processor 2 connected to a trunk line A, a controller 3 to control the whole system, a memory 4, a PHS data transmitter-receiver processor 5, an antenna for PHS 6, a GPS data receiver processor 7, and an antenna for GSP 8. And a radio terminal machine 11 is composed of an antenna for PHS 12, a PHS data transmitter-receiver processor 13, a controller 4, a memory 15, a push-button input 16, a display 17, a voice converter 18, a speaker 19, a GPS data receiver processor 20, and an antenna for GPS 21.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a GPS device for measuring the current position, and more particularly to a GPS device for mounting a GPS on a mobile phone and accurately measuring position information on the side of a wireless terminal.

[0002]

2. Description of the Related Art Conventionally, as represented by automobile navigation, GPS (global position) is used.
There is a device that obtains position information by using an oning system). This GPS has GPS satellites that radiate radio waves containing position and time information to the ground, and knows the position and altitude of a vehicle by receiving radio waves from a plurality (usually three or more) of GPS satellites. Is something that can be done. Then, the information obtained by this GPS is used as a CD-RO.
It becomes a system that can know the current position by combining with the map information that has been input in advance by M or the like.

[0003]

However, a normal GPS is used.
In a system that has an antenna for reception and only receives information from satellites, 1 is set between the current position and the received position information.
There is a problem that an error of around 00 m occurs.

[0004]

The present invention has been made in view of the above problems, and is a portable telephone system for performing voice or data communication between a base station and a mobile wireless terminal using radio waves. GPS using mobile phone system with GPS installed in both base station and wireless terminal
Furthermore, the error data of the position information received by the GPS is obtained by comparing the accurate position information of the base station itself, which is input in advance to the base station, with the position information received by the GPS of the base station. A GPS device using a mobile phone system that corrects position information received by GPS of the wireless terminal by calculating and transmitting error data to the wireless terminal.

[0005]

As in the present invention, the GPS is mounted on the PHS system, and the error data between the accurate position information and the GPS position information is transmitted from the base station to the wireless terminal device. Since the received position information has only a relative error, the GPS device can obtain position information with extremely high accuracy.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a first embodiment of the present invention and showing a system in which GPS is installed in both a PHS base station and a wireless terminal. The base station 1 is connected to the trunk line A such as ISDN or a normal telephone line, is installed on a rooftop of a building, a telephone pole, a telephone box, etc., and can communicate with the wireless terminal 11 within a radius of several hundred meters. Yes, the main line data transmission / reception processing unit 2, a control unit 3 for controlling the whole, a memory 4, a PHS data transmission / reception processing unit 5, a PHS antenna 6, a GPS data reception processing unit 7, and a GPS antenna 8. In addition, the wireless terminal 11 includes the PHS antenna 1
2, PHS data transmission / reception processing unit 13, control unit 14 for controlling the whole, memory 15, push button input unit 16, display unit 17, voice conversion unit 18, call unit 19, further GPS reception data processing unit 20, for GPS It includes an antenna 21.
GPS which is the GPS data receiving part used in this embodiment
Reception data processing units 7 and 20 and GPS antennas 8 and 21
Can use GPS devices, parts, etc. that have been conventionally used. In the present embodiment, PHS was used.
It is also possible to use other mobile phone systems such as car phones, and the same applies to the second embodiment described below.

When transmitting information such as a call or data from the user of the main line A to the user of the wireless terminal 1, the main line data transmission / reception processing unit 2 of the base station 1 receives the information received from the main line A in the control unit 3 , To the PHS data transmission / reception processing unit 5, which is wirelessly transmitted from the PHS antenna 6, received by the PHS antenna 12 of the wireless terminal device 11, and sequentially transmitted to the PHS data transmission / reception processing unit 13 and the control unit 14. By being sent to the voice conversion unit 18 and the call unit 19 or the display unit 17, a call or data transmission becomes possible. Conversely, when transmitting information from the user of the wireless terminal 11 to the user of the trunk line A, the push button input unit 16 and the call unit 19 are used.
And the voice conversion unit 18, or the memory 15 to the control unit 14,
The data is sequentially sent to the PHS data transmission / reception processing unit 13, wirelessly transmitted from the PHS antenna 12 to the base station 1, received by the PHS antenna 8 of the base station 1, and received by the PHS data transmission / reception processing unit 5, control unit 3, main line data transmission / reception. The information is sequentially sent to the processing unit 2, and the information can be sent to the trunk line A.

The operation of this embodiment will be described with reference to the flow chart of FIG. 2. In the memory 4 of the base station 1, accurate position information of the base station 1 itself is registered. First, the base station 1 receives data from the GPS reception antenna 8 (step 1), and the GPS reception data processing unit 7 calculates GPS position information (step 2). The position information is transmitted to the control unit 3 and compared with the accurate position information stored in the memory 4 to calculate error data of the position information received by the GPS (step 3). At that time, the wireless terminal 1 also receives data from the GPS reception antenna 21 (step 4), and the GPS reception data processing unit 20 calculates GPS position information (step 5). And step 3
The error data calculated in step 5 is wirelessly transmitted to the wireless terminal 1 (step 6), the wireless terminal 1 receives the received error data (step 7), and then the position data calculated in step 5 is received in step 7. GP based on the error data
The position information of S is corrected (step 8). The position information after the correction is displayed on the display unit 17 (step 9),
Alternatively, the corrected position information is wirelessly transmitted to the base station 1 (step 10) and received by the base station 1 (step 1).
1) After that, the data is transmitted to the trunk line A through the PHS antenna 6, the PHS data transmission / reception processing unit 5, the control unit 3, and the trunk data transmission / reception processing unit 2 (step 12), and an external system such as a computer connected to the trunk line A. Input (not shown) (step 13). As a result, since the positions of the base station 1 and the wireless terminal 11 are close to several hundred meters, it is possible to obtain highly accurate position information having only a slight relative error.

Further, at the time of displaying on the display unit 17 in step 9, the map information is read out by the connection with the memory 15 of the wireless terminal 11 or software or an external device, and is combined with the above-mentioned position information to make the wireless communication. It is possible to know where the user of the terminal 11 is in a real time,
You can know the exact route to your destination. Also,
Similarly, when the position information is input to the external system in step 13, the user of the external system can know exactly where the user of the wireless terminal 11 is by matching the map information.

In this embodiment, the case where the wireless terminal 11 capable of making a call is used is shown. However, by using the wireless terminal 11 exclusively for position information and further enhancing the display unit 17, the GPS device The role as can be further enhanced.

FIG. 3, FIG. 4, and FIG. 5 show a second embodiment of the present invention, and are block diagrams showing a measuring instrument used for measuring the coverage of one PHS base station. FIG. The base station used is that shown in the first embodiment.

As described above, the coverage area between one base station of the PHS and the wireless terminal is several hundred meters.
Moreover, because the area is not always a circle due to the influence of buildings, etc., the electric field strength and BER (bit error occurrence rate) of the signal wirelessly transmitted from one base station are received and measured at a certain point, It is necessary to install the base station so that there is no point (dead zone) where the wireless terminal cannot transmit or receive. Therefore, standing at a certain point with a portable measuring instrument, the electric field strength and BER are measured there to measure the receivable limit point, and the receivable area of one base station (hereinafter referred to as the service area Need to ask).

Here, as the measuring device, the wireless terminal used in the first embodiment is provided with a function capable of measuring the electric field strength and BER, and the electric field strength and BER are measured to measure the receivable limit point. Then, the service area can be obtained by marking and connecting the limit points to the map on the paper.

However, in this embodiment, the wireless terminal is a wireless terminal, as shown in the block diagram of FIG. 3, for the purpose of displaying the map information on the screen of the wireless terminal. The measuring device 31 includes a PHS antenna 32 and a PHS.
Radio section 33, received data processing section 34, electric field strength and BE
R calculation processing section 35, control section 36 having CPU and controlling the whole, memory 37, display section 38, push button input section 3
9, a GPS antenna 40, a GPS receiver 41, and a received data processor 42.

The received data processing unit 34 reproduces the data sent in synchronization with the signal sent from the base station, and at the same time sets the strength of the received signal to the electric field strength and BE.
It is sent to the R calculation processing unit 35. The electric field strength and BER calculation processing unit 35 digitizes the received electric field strength, calculates the BER of the received data, and sends the calculation result to the control unit 36. Map information is registered in the memory 37, and reception data and measurement points can be registered. Display unit 38
Can display map information, limit points and service areas, and can also display electric field strength and BER. Moreover, as shown in FIG. Input unit 39
It can be used as an operation button similar to. The push button input unit 39 is an operation button of the measuring device 31.
The GPS reception data processing unit 42 includes a GPS antenna 40,
The current position is calculated from the GPS data received from the GPS receiving unit 41 and sent to the control unit 36.

Here, accurate position information and GPS are obtained at the base station.
The error data is calculated by comparing with the position information from, and the error data is wirelessly transmitted to the measuring device 31, which is a wireless terminal, and the GPS antenna 40, the GPS receiving unit 41, and the received data processing unit of the measuring device 31. The method of correcting the position information obtained by 42 with the above-described error data is the same as in the first embodiment.

FIG. 4 is an external view of the measuring device 31 of the present embodiment, in which map information is input by an IC memory card or the like,
A wireless unit 44 including a PHS antenna 32, a PHS wireless unit 33, a GPS antenna 40, and a GPS receiving unit 41 is connected to a processing unit 43 such as a portable personal computer that processes data from a wireless unit described below. Composed. FIG. 4A is an external view of the processing unit 43 and the wireless unit 44 before connection.
(B) is an external view after connection.

By performing measurement using the measuring device 31 of this embodiment, it is possible to measure the receivable limit point,
By plotting and connecting the limit points to the map information displayed on the screen of the display unit 38, the service area can be known. FIG. 5 is an external view of the measuring instrument 31 showing a state in which the service area is displayed on the screen of the display unit 38. The data displayed on the display unit 38 is the PHS antenna 32.
It is also possible to perform wireless transmission to a base station, or after data is dropped on an IC memory card, floppy disk or the like, the work area or the like can centrally manage the service areas of all base stations.

[0019]

As described above, according to the GPS device using the mobile phone system of the present invention, voice or data communication is performed between the base station and the moving wireless terminal using radio waves. In the mobile phone system, both the base station and the wireless terminal are equipped with GPS, and further, the accurate position information of the base station itself inputted in advance in the base station and the position information received by the GPS of the base station are stored. By calculating the error data of the position information received by the GPS and transmitting the error data to the wireless terminal, the position information received by the GPS of the wireless terminal is corrected very much. A GPS device using a mobile phone system that can obtain highly accurate position information can be provided.

[Brief description of drawings]

FIG. 1 is a configuration block diagram showing a base station and a wireless terminal according to a first embodiment of the present invention.

FIG. 2 is a flowchart showing the operation of the first exemplary embodiment of the present invention.

FIG. 3 is a configuration block diagram showing a measuring instrument according to a second embodiment of the present invention.

4A and 4B are external views showing a measuring instrument according to a second embodiment of the present invention, where FIG. 4A is before connection between the processing unit and the wireless unit, and FIG.

FIG. 5 is an external view showing a measuring instrument according to a second embodiment of the present invention.

[Explanation of symbols]

 A: Trunk line 1: Base station 2: Trunk line data transmission / reception processing unit 3, 14, 36: Control unit 4, 15, 37: Memory 5, 13: PHS data transmission / reception processing unit 6, 12, 32: PHS antenna 7, 20 : GPS data reception processing unit 8, 21, 40: GPS antenna 11: Wireless terminal device 16, 39: Push button input unit 17, 38: Display unit 18: Voice conversion unit 19: Communication unit 31: Measuring instrument 33: PHS Radio parts 34 and 42: Received data processing part 35: Electric field strength and BER calculation processing part 41: GPS reception part 43: Processing part 44: Radio part

Claims (2)

[Claims] 1. A mobile phone system for performing voice or data communication using radio waves between a base station and a mobile wireless terminal, wherein GP is provided for both the base station and the wireless terminal.
A GPS device using a mobile phone system, which is equipped with S. 2. Comparing accurate position information of the base station itself inputted in advance to the base station with position information received by the GPS of the base station, and calculating error data of the position information received by the GPS. Then, by transmitting the error data to the wireless terminal, the G
The GP using the mobile phone system according to claim 1, wherein the position information received by the PS is corrected.
S device.