JP2002010323A - Position specifying system for mobile terminal and mobile unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a position specifying system for a mobile terminal and mobile unit capable of enlarging environment in which the system can be applied. SOLUTION: A mobile terminal comprises a GPS(Global Positioning System) receiving unit 103, a PHS(Personal Handy Phone System) receiver 105 and a portable telephone receiver 109. Signals to be used for position identifying of the mobile terminal are selected from the signals received by the GPS receiving unit 103, the PHS receiver 105 and the portable telephone receiver 109 based on respective electric wave situation to be used.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile terminal and a moving object position specifying system, and more particularly to a mobile terminal and a position of a moving object for specifying the position of an object (eg, a person or a vehicle) to which the mobile terminal is attached. For specific systems.

[0002]

2. Description of the Related Art Conventionally, detection methods for detecting the position of a moving body have been developed. Methods for detecting the position of a moving object include (1) GPS (Global Positioning System)
(2) PHS (Personal Handy Phone S
(3) A method using a mobile phone is known.

[0003] In the method using GPS, a GPS receiver is attached to a mobile object, and signals from a plurality of GPS satellites are received by the GPS receiver to identify the current position of the mobile object. In the method using a PHS or a mobile phone, a PHS mobile terminal or a mobile phone is attached to a mobile body. An identification code of the base station is sent from the base station to the PHS portable terminal or mobile phone, and the current position of the mobile is identified by analyzing the identification code and the electric field strength of the received radio wave.

[0004]

However, the prior art has the following problems.

(1) Problems with the method using GPS: The current position of the moving object cannot be specified in places where radio waves from GPS satellites do not reach, such as in underground malls and tunnels.

In a city area, it is difficult to supplement satellites necessary for specifying a position.・ Separate communication equipment is required to know the location of the moving object from a remote location.

[0007] Large power consumption. (2) Problems of the method using the PHS ・ When the moving body is moving at high speed, information for specifying the position cannot be transmitted to the center station.

[0008] The PHS has a narrow coverage area,
The location of the moving object cannot be specified in places where the radio waves do not reach.

(3) Problems of the method using a mobile phone ・ Since the radio zone of one base station is large, it is difficult to improve the accuracy of position identification.

[0010] The location cannot be specified where radio waves from the mobile phone do not reach.

[0011]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and has as its object to provide a mobile terminal and a mobile object position specifying system capable of expanding a usable environment. I have.

According to an aspect of the present invention, there is provided a mobile terminal comprising: a GPS receiving unit for receiving a signal from a GPS satellite; a PHS receiver for receiving a radio wave from a PHS base station; A mobile phone receiver for receiving radio waves from the base station.

Preferably, the mobile terminal is a GPS receiver, P
There is further provided a selecting means for selecting a signal to be used for position identification of the mobile terminal from signals received by the HS receiver and the mobile phone receiver.

Preferably, the selection means performs the selection based on the radio wave condition. Preferably, the mobile terminal further includes a transmitting unit that transmits a signal received by at least one of the GPS receiving unit, the PHS receiver, and the mobile phone receiver.

Preferably, the mobile terminal is a GPS receiver, P
The apparatus further includes means for specifying a current position using a signal received by at least one of the HS receiver and the mobile phone receiver.

According to another aspect of the present invention, a system for locating a mobile unit includes any one of the above-mentioned mobile terminals and a center station for receiving information from the mobile terminal via a line. The position of the mobile terminal is calculated based on the information.

[0017] Preferably, the position specifying system for a mobile terminal transmits the calculated position of the mobile terminal to the mobile terminal.

According to these inventions, the mobile terminal is provided with a GPS
Since the receiving unit, the PHS receiver, and the mobile phone receiver are provided, it is possible to provide a mobile terminal and a mobile object position specifying system capable of expanding a usable environment.

[0019]

FIG. 1 shows a first embodiment of the present invention.
FIG. 1 is a diagram showing an entire configuration of a mobile object position specifying system in one embodiment.

Referring to FIG. 1, a mobile object position specifying system includes GPS satellites 4a to 4c, mobile terminal 1 capable of receiving radio waves from GPS satellites 4a to 4c, and mobile terminal 1
A plurality of PHS base stations 2a to 2c and mobile phone base stations 3a to 3c communicating with the mobile station 1 via the PHS base stations 2a to 2c or the mobile phone base stations 3a to 3c. Consists of

The PHS base stations 2a to 2c are connected to the center station 5 via a PHS network and a public line network. On the other hand, the mobile phone base stations 3a to 3c are connected to the center station 5 via a mobile phone network and a public line network.

The mobile terminal 1 has a function of receiving radio waves from the GPS satellites 4a to 4c, a function of a PHS telephone, and a function of a portable telephone. The mobile terminal 1 is a GPS satellite 4a
4c, the radio waves from the PHS base stations 2a to 2c, and the radio waves from the mobile phone base stations 3a to 3c are measured, and the radio wave with the best radio wave condition is determined. Select the information. Note that, here, the information from the one with the better radio wave condition is selected and transmitted to the center station 5, but all the received information may be transmitted to the center station 5. In this transmission, the PHS base stations 2a to 2c or the mobile phone base stations 3a to 3c
It is desirable to perform transmission via a base station having a good radio wave condition selected from 3c.

The center station 5 receives GPS information, PHS information (base station code and electric field strength), or mobile phone information (base station code and electric field strength) transmitted from the mobile terminal 1, and receives the information. The position of the mobile terminal 1 is specified based on the information, and the position of the mobile terminal 1 is displayed on a map displayed on the display device of the center station 5.

FIG. 2 is a block diagram showing the configuration of the center station 5. As shown in FIG. Referring to the figure, center station 5 demodulates a signal from mobile terminal 1 sent through a public network, and demodulates the current position of mobile terminal 1 based on an output from signal demodulation unit 501. Position calculation unit 503 to calculate
A display unit 505 for displaying the calculated position superimposed on the map, a mobile terminal calling unit 507 for calling the mobile terminal 1 for position identification, and a PHS for the position calculating unit 503.
The database 509 of the PHS base station transmitting the data of the base station and the database 51 of the mobile phone base station transmitting the data of the mobile phone base station to the position calculating unit 503
And 1.

The database 509 of the PHS base station and the database 511 of the mobile phone base station respectively include the identification code of the base station and the data of the base station (the coordinates where the base station exists, longitude and latitude, etc.). Remember.

The signal from mobile terminal 1 received via the line is demodulated by signal demodulation section 501 and is calculated by position calculation section 5.
03 is output. If the input information from the mobile terminal 1 is GPS information, the position calculation unit 503 uses the GP
The current position of the mobile terminal 1 is specified according to the position specifying method of S. On the other hand, when the input information from the mobile terminal is PHS information, the data of the PHS base station database 509 is referred to based on the identification information of the plurality of PHS base stations and the electric field strength of the received radio wave. Then, the current position of the mobile terminal 1 is specified.

If the input information from the mobile terminal 1 is mobile phone information, the mobile phone base station database 511 is stored in the mobile phone base station based on the identification information of the mobile phone base station and the electric field strength of the received radio wave. By referring to the position, the position of the mobile terminal 1 is specified.

The display unit 505 displays the position of the mobile terminal 1 specified by the position calculation unit 503 on a map.

The mobile terminal calling unit 507 makes a call to the mobile terminal 1 and requests the mobile terminal 1 for information for specifying a position.

When the center station 5 specifies the position from the GPS information, the center station 5 can specify the position of the mobile terminal by incorporating the GPS differential information, and can improve the accuracy.

It is also possible to call the mobile terminal 1 by the mobile terminal calling unit 507 and obtain its location information. However, a specific button or the like is provided on the mobile terminal 1 and when the button is pressed, the mobile terminal 1 is connected through a line. Information for specifying the position may be transmitted from the mobile terminal 1 to the center station 5.

FIG. 3 is a block diagram showing the configuration of the mobile terminal 1. Referring to the figure, mobile terminal 1 is a GPS satellite,
An antenna 101 for exchanging radio waves between a mobile phone base station and a PHS base station, a GPS receiving unit 103 for receiving a signal from a GPS satellite, a PHS receiver 105 for receiving a radio wave from the PHS base station, A PHS transmitter 107 for transmitting radio waves to the PHS base station; a mobile phone receiver 109 for receiving radio waves from the mobile phone base station; a mobile phone transmitter 111 for transmitting radio waves to the mobile phone base station; The communication target P based on the signal from the PHS base station
A PHS identification information detecting unit 113 for detecting information for specifying an HS base station, a PHS electric field intensity measuring unit 115 for measuring the electric field intensity of a radio wave from the PHS base station, and a mobile phone base station performing communication. A mobile phone identification information detecting unit 117 for detecting information for specifying, a mobile phone electric field intensity measuring unit 119 for measuring the electric field intensity of a radio wave from a mobile phone base station, received GPS information, PHS information,
A control unit 121 for selecting information to be transmitted to the center station 5 based on the information of the mobile phone and controlling the entire apparatus;
It comprises a memory 123, a display unit 125, an operation unit 127, a speaker 129, and a microphone 131.

The mobile terminal 1 transmits the information received from the GPS satellite to the center station 5 when the condition of the radio wave from the GPS satellite is the best. When the radio wave condition from the PHS base station is the best, the identification information of the plurality of PHS base stations and the electric field strength of the received radio wave are transmitted to the center station 5.

When the radio wave condition from the mobile phone base station is the best, the identification information of the plurality of mobile phone base stations and the electric field strength of the received radio wave are transmitted to the center station 5.

When transmitting information on GPS, PHS, or mobile phone to the center station 5, the mobile terminal 1 selects and uses a mobile phone base station or a PHS base station having a better radio wave condition. Note that a function may be provided to fix the communication network used when transmitting data from the mobile terminal to the center station based on the input from the user to either the mobile phone network or the PHS network.

The condition for the mobile terminal 1 to select the information to be transmitted to the center station 5 from the information on the GPS, PHS and mobile phone may be input by the user by operating the mobile terminal.

For example, the following conditions can be considered as conditions for selecting information to be transmitted. -When the radio waves of four or more GPS satellites can be received, the GPS information is transmitted to the center station.

When the electric field strength of the radio wave of the PHS base station is strong, the information of the PHS base station is transmitted to the center station.

When the electric field strength of the radio wave of the mobile phone base station is strong, the information of the mobile phone base station is transmitted to the center station.

In the above-described embodiment, the GP
Among the information of S, PHS and mobile phone, the information of the best radio wave condition is transmitted to the center station.
All information of PS, PHS and mobile phone may be transmitted to the center station. When all the information is transmitted to the center station in this manner, the center station can perform position identification using various types of information, so that the accuracy of the position identification can be improved.

Further, the information to be transmitted to the center station may be made selectable by the user. The user may be able to switch between a mode in which information on the best radio wave condition is transmitted to the center station and a mode in which all information is transmitted to the center station.

Further, in the present embodiment, information is transmitted to the center station, and the center station calculates the current position. However, the current position may be calculated inside the mobile terminal. The calculated current position may be sent to the center station.

As described above, the mobile terminal according to the present embodiment has both the GPS function, the PHS function, and the mobile phone function. Then, when the conditions for specifying the position in the GPS are good, the position of the mobile terminal is specified using the information of the GPS. If the condition of the PHS radio wave is good, the position of the mobile terminal is specified using the PHS radio wave information. GPS and P
If the HS condition is bad, the position of the mobile terminal is specified using the radio wave information of the mobile phone. As a result, it is possible to provide a system capable of accurately specifying the position of the latitude terminal under all conditions.

[Other Embodiments] The control section may execute the flowchart shown in FIG.

FIG. 4 is a flowchart showing a process for selecting information to be transmitted to the center station. Referring to the figure, first, in step S101, each of the GPS receiving unit, the PHS receiver, and the mobile phone receiver receives GPS, P
HS, measure the radio wave of the mobile phone. If it is determined in step S103 that the GPS radio wave is the best, it is determined in step S105 whether the PHS radio wave is good.

If YES in step S105, GPS information is transmitted to the center station via the PHS network in step S107. On the other hand, if “NO” in the step S105, the GPS information is transmitted to the center station via the mobile phone network in a step S109.

If NO in step S103, it is determined whether the PHS radio wave is the best in step S111. If YES, information on the PHS base station is transmitted to the center station via the PHS network in step S113. .

If NO in step S111, information on the mobile phone base station is transmitted to the center station via the mobile phone network in step S115.

In this embodiment, information to be transmitted in the order of GPS, PHS, and mobile phone is selected in accordance with the radio wave condition. That is, selection is performed in order from information with high position identification accuracy, so that it is possible to provide a mobile object position identification system with high detection accuracy.

The embodiments disclosed this time are to be considered in all respects as illustrative and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a configuration of a position specifying system for a moving object according to one of the embodiments of the present invention.

FIG. 2 is a block diagram showing a configuration of a center station 5.

FIG. 3 is a block diagram illustrating a configuration of a mobile terminal.

FIG. 4 is a flowchart illustrating a process according to another embodiment.

[Explanation of symbols]

1 mobile terminal, 2a-2c PHS base station, 3a-3c
Mobile phone base station, 4a-4c GPS satellite, 5 center station, 103 GPS receiver, 105 PHS receiver, 109 mobile phone receiver, 113 PHS identification information detector, 115PHS electric field strength measurement section, 117 mobile phone identification information detection Section, 119 mobile phone electric field strength measurement section,
121 control unit, 503 position calculation unit, 505 display unit, 509 PHS base station database, 511 mobile phone base station database.

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Katsuhiko Kumamoto, Inventor 1-16-20 Minamisenba, Chuo-ku, Osaka Muraki Building 5F Lokas Co., Ltd. F-term (reference) 5J062 AA08 BB01 BB05 CC07 5K024 AA71 BB00 CC11 DD01 DD02 FF01 GG01 GG10 5K027 AA11 AA12 BB04 CC08 EE01 EE15 HH00 HH26 5K067 BB03 BB04 BB08 DD20 EE02 EE10 EE16 FF03 FF16 GG01 GG11 JJ52 JJ53 JJ56

Claims (7)

[Claims] 1. A GPS for receiving a signal from a GPS satellite
A mobile terminal comprising: a receiving unit; a PHS receiver for receiving radio waves from a PHS base station; and a mobile phone receiver for receiving radio waves from a mobile phone base station. 2. The apparatus according to claim 1, further comprising a selection unit that selects a signal to be used for identifying a position of a mobile terminal from signals received by the GPS receiving unit, the PHS receiver, and the mobile phone receiver. A mobile terminal according to claim 1. 3. The mobile terminal according to claim 2, wherein said selection means makes a selection based on a radio wave condition. 4. The apparatus according to claim 1, further comprising a transmitting unit configured to transmit a signal received by at least one of the GPS receiving unit, the PHS receiver, and the mobile phone receiver.
The mobile terminal according to any one of the above. 5. The apparatus according to claim 1, further comprising: means for specifying a current position using a signal received by at least one of said GPS receiver, said PHS receiver and said mobile phone receiver. A mobile terminal as described in Crab. 6. The mobile terminal according to claim 1, further comprising: a center station that receives information from the mobile terminal via a line, wherein the center station is configured to receive the information based on the received information. Locating system for moving objects that calculates the position of a moving object. 7. The system according to claim 6, wherein the calculated position of the mobile terminal is transmitted to the mobile terminal.