JP2017083290A - Portable terminal, location specification method of portable terminal, and location specification program of portable terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a portable terminal and the like that easily supplement a specification of a location based on satellite positioning.SOLUTION: A portable terminal comprises: a satellite radio wave reception unit that receives radio waves from a positioning satellite; a recording unit that records a capturing quantity threshold about a capturing satellite quantity serving as the number of satellites having the radio wave received by the satellite radio wave reception unit, and a prescribed threshold about intensity of radio waves from base stations; and a communication unit that communicates with the base stations. When the number of capturing satellites is more than the capturing quantity threshold, a location of the portable terminal is specified based on location information on the satellite in which the radio wave can be received via the satellite radio wave reception unit and a radio wave transmission time. Although the number of capture satellites is smaller than the capture quantity threshold, when the intensity of the radio wave received from a portable telephone base station in which the communication unit is in a communication state of the base stations is equal to or more than the prescribed threshold, the location of the portable terminal is specified based on location information on the portable telephone base station in which the communication unit is in the communication state of the base stations.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a method for specifying the position of a mobile terminal.

  Patent Document 1 and the like propose a communication system that calculates position information of a public radio base station based on a distance from the public radio base station and uses the position information of a portable terminal.

JP 2012-103138 A

  However, it is necessary to calculate the distance from the public radio base station, and the estimation of position information becomes complicated.

  Accordingly, an object of the present invention is to provide a portable terminal or the like that supplements specification of a position based on satellite positioning in a simple manner.

  A mobile terminal according to the present invention includes a satellite radio wave receiving unit that receives radio waves from positioning satellites, a capture number threshold value related to the number of captured satellites that is the number of satellites received by the satellite radio wave receiving unit, and radio waves from a base station. A portable terminal provided with a recording unit that records a predetermined threshold value for intensity and a communication unit that communicates with a base station, and when the number of captured satellites is greater than or equal to the captured number threshold value, Based on the location information of the satellite that received the radio wave and the radio wave transmission time, the position of the mobile terminal is specified, and the number of captured satellites is less than the threshold for the number of captured satellites. If the strength of the radio wave received from the mobile phone base station in the base station is greater than or equal to a predetermined threshold, the location of the mobile terminal is identified based on the location information of the mobile phone base station in the communication state of the base station Is done.

  In this case, it is possible to specify an approximate position using the position of a nearby base station even under conditions where the position information cannot be obtained accurately by satellite positioning.

  In addition, by simply comparing the set threshold value (capture number threshold value, predetermined threshold value) with the measurement result (the intensity of received radio waves, the number of captured satellites), the location specification based on the location information of the mobile phone base station (first It is possible to determine whether or not to perform (3 position specification). For this reason, it is possible to perform position specification that supplements position specification based on satellite positioning by a simple comparison operation.

  Preferably, the recording unit records a base station database including base station identification information, base station position information, and information for each base station regarding an intensity threshold, and is in communication with a communication unit among the base stations. If the signal is included in the base station database, and the intensity of the radio wave received from the base station that is in communication with the communication unit is an intensity threshold that is greater than or equal to that corresponding to the base station in the base station database In addition, the position of the mobile terminal is specified based on the position information of the base station included in the base station database and the communication unit in the communication state.

In this case, the position of the mobile terminal can be specified with higher accuracy than the position information obtained by satellite positioning.
It is a communication area of the base station included in the base station database, and a mobile terminal needs to be near the base station so that the strength of the radio wave is higher than the intensity threshold. If the number is increased, it is possible to increase the area where the position can be specified by the position specification (first position specification) based on the position information of the base station included in the base station database.

  Also, by comparing the set threshold value (intensity threshold value, capture number threshold value, predetermined threshold value) with the measurement results (received radio wave intensity, number of captured satellites), the location information of the base station included in the base station database It is possible to determine whether or not to perform position specification based on (first position specification) and position specification based on position information of the mobile phone base station (third position specification). For this reason, it is possible to perform position specification that supplements position specification based on satellite positioning by a simple comparison operation.

  More preferably, any of the intensity threshold values in the base station database corresponding to the mobile phone base station is set to a value larger than a predetermined threshold value.

  Preferably, the intensity threshold for each base station in the base station database is the intensity of the radio wave received from the base station when the distance between the base station and the mobile terminal in communication with the communication unit is 10 m or less. Is set.

  Preferably, the base station is at least one of a wireless LAN access point and a wireless PAN access point, and a mobile phone base station, which is fixed at a specific location. The communication of the access point is performed without receiving a connection permission notification from the access point of the wireless LAN, and the communication of the communication unit and the access point of the wireless PAN is notified of the connection permission from the access point of the wireless PAN. It is done without receiving.

  Preferably, when the number of captured satellites is less than a captured number threshold, and the strength of radio waves received from a mobile phone base station in which the communication unit is in a communication state among the base stations is not equal to or greater than a predetermined threshold. The position specified within a certain time (second time) is set as the position of the mobile terminal.

  When the strength of radio waves received from a base station in communication is weak, there is a possibility that the mobile terminal and the base station are separated and it is not appropriate to set the position of the base station as the position of the mobile terminal. High (large error), but the position information obtained by the previous position specification is relatively small, so it is not the latest position information, but the position information obtained by the previous position specification is used. It becomes possible to specify the approximate position.

  More preferably, the display unit further includes a display unit that displays the specified position, and the display unit specifies at least one of a display method in which a color is different for each position specifying type and a display method that indicates the position specifying type in characters. The position is displayed on the map.

  As a result, it is possible to easily visually recognize by which method the position is specified.

  A mobile terminal according to the present invention includes a satellite radio wave receiving unit that receives radio waves from positioning satellites, a capture number threshold value related to the number of captured satellites that is the number of satellites received by the satellite radio wave receiving unit, and radio waves from a base station. A recording unit that records a predetermined threshold value regarding strength, base station identification information, base station position information, and a base station database that includes information for each base station regarding an intensity threshold value; a communication unit that communicates with the base station; A mobile terminal that is in communication with the communication unit among the base stations is included in the base station database, and the intensity of the radio wave received from the base station that is in communication with the communication unit is If the intensity threshold is greater than or equal to the one corresponding to the base station in the base station database, the position information of the base station that is included in the base station database and in which the communication unit is in a communication state The position of the mobile terminal is identified based on the radio wave received from the base station that is in communication with the communication unit, not included in the base station database, or received from the base station in communication with the communication unit If the signal strength is not higher than the threshold corresponding to the base station in the base station database and the number of captured satellites is greater than the captured number threshold, radio waves can be received via the satellite radio wave receiver. Based on the position information of the satellite and the radio wave transmission time, the position of the mobile terminal is specified, and the base station that is in communication with the communication unit is not included in the base station database, or the base station The number of captured satellites is captured when the strength of radio waves received from those in communication with the communication unit is not greater than the strength threshold corresponding to the base station in the base station database. If the intensity of the radio wave received from the mobile phone base station that is less than the threshold and the communication unit of the base station is in communication is greater than or equal to a predetermined threshold, the mobile unit of the base station that is in communication The position of the mobile terminal is specified based on the position information of the telephone base station.

  A mobile terminal position specifying method according to the present invention includes a satellite radio wave receiving unit that receives radio waves from positioning satellites, a capture number threshold that relates to the number of captured satellites that is the number of satellites that have received radio waves at the satellite radio wave receiving unit, and a base Communicates with the base station, a recording unit for recording a predetermined threshold value regarding the radio field intensity from the station, a base station database including identification information of the base station, position information of the base station, and information for each base station regarding the strength threshold value A method for specifying a location of a mobile terminal having a communication unit, wherein a base station that is in communication with a communication unit is included in a base station database, and a base station that is in communication with a communication unit When the received radio wave intensity is greater than or equal to the intensity threshold corresponding to the base station in the base station database, the base station database includes the base station database and the communication unit communicates The first location identifying step for identifying the location of the mobile terminal based on the location information of what is in the state, and the base station that is in communication with the communication unit is not included in the base station database, or When the strength of radio waves received from those in communication with the communication unit is an intensity threshold that is not greater than that corresponding to the base station in the base station database, and the number of captured satellites is greater than the capture number threshold In addition, a second position specifying step for specifying the position of the mobile terminal based on the position information and the radio wave transmission time of the satellite that can receive the radio wave via the satellite radio wave receiving unit, and the communication unit and the communication state of the base station Is not included in the base station database, or the intensity of the radio wave received from the base station that is in communication with the communication unit is an intensity threshold value in the base station database. If the intensity of the radio wave received from the mobile phone base station in which the number of captured satellites is less than the capture number threshold and the communication unit of the base station is in communication is A third position specifying step of specifying the position of the mobile terminal based on the position information of the mobile phone base station in which the communication unit of the base station is in communication is provided when the threshold is equal to or greater than the threshold.

  The mobile terminal position specifying program according to the present invention includes a satellite radio wave receiving unit that receives radio waves from positioning satellites, a capture number threshold value regarding the number of captured satellites that is the number of satellites that have received radio waves at the satellite radio wave receiving unit, Communicates with the base station, a recording unit for recording a predetermined threshold value regarding the radio field intensity from the station, a base station database including identification information of the base station, position information of the base station, and information for each base station regarding the strength threshold value A location determination program for a mobile terminal having a communication unit, which is included in the base station database and is in communication with the communication unit among the base stations, in the base station in communication with the communication unit If the received radio wave intensity is greater than or equal to the intensity threshold corresponding to the base station in the base station database, the base station database includes the base station database and The first position specifying step for specifying the position of the mobile terminal based on the position information of the communication unit in communication state, and the base station that is in communication with the communication unit is not included in the base station database, Or, when the strength of the radio wave received from the base station that is in communication with the communication unit is the strength threshold value and is not equal to or higher than that corresponding to the base station in the base station database, the number of captured satellites is the captured number threshold value. In the case where there are more than the above, the second position specifying step of specifying the position of the mobile terminal based on the position information and the radio wave transmission time of the satellite that can receive the radio wave via the satellite radio wave receiving unit, and communication among the base stations Is in the base station database, or the strength of the radio wave received from the base station that is in communication with the communication unit is the strength threshold, and the base station database The intensity of the radio wave received from the mobile phone base station in which the number of captured satellites is less than the capture number threshold and the communication unit of the base station is in communication, A third position specifying step of specifying the position of the mobile terminal based on the position information of the mobile phone base station in which the communication unit of the base station is in communication is provided when the predetermined threshold value is exceeded.

  As described above, according to the present invention, it is possible to easily provide a portable terminal or the like that supplements specification of a position based on satellite positioning.

It is a block diagram of the portable terminal in this embodiment. It is a figure which shows the example of the content of a base station database. It is a flowchart which shows the procedure of a position specific program. It is a figure which shows the example of a display of the map containing the specified position.

  Hereinafter, the present embodiment will be described with reference to the drawings. The mobile terminal 1 in this embodiment includes an operation unit 10, a recording unit 20, a communication unit 30, a display unit 40, a satellite radio wave receiving unit 50, and a control unit 90 (see FIG. 1).

The operation unit 10 is input means such as a numeric keypad for inputting a telephone number and the like.
When the user of the mobile terminal 1 operates the operation unit 10, on / off control of the position specifying program, update control of the base station database DB 1 through the communication unit 30, and the like are performed.

The recording unit 20 includes a base station database DB1 for determining position information, a map database DB2 displayed on the display unit 40, an intensity threshold (first threshold) t1 for each base station set in the base station database DB1, and the number of captures A threshold value (second threshold value) t2 and a predetermined threshold value (third threshold value) t3 related to the radio wave intensity from the mobile phone base station are recorded.
The recording unit 20 is installed with a position specifying program for selecting a positioning means for specifying position information.

The base station database DB1 has a base station name, a base station type, base station identification information, base station position information, and a strength threshold t1, and is recorded in advance by a location specifying program provider or the like. Recorded in the unit 20 (see FIG. 2).
The base station database DB1 is preferably updated via the communication unit 30 every first time (for example, one week) as the registered base station information is updated.

  The base station referred to in the present embodiment is a device that emits radio waves and can communicate with the communication unit 30 and is fixed at a specific location. For example, a base station of a mobile phone base station (a communication carrier that forms a radio link with a mobile phone) Stations, wireless WAN (Wireless Wide Area Network) base stations and wireless MAN (Wireless Metropolitan Area Network) base stations), wireless LAN (Wireless Local Area Network, IEEE 802.11) access points, wireless PAN (Personal Area Network, A base station in a wireless network such as an IEEE 802.15.1 (IEEE802.15 including Bluetooth (registered trademark)) access point corresponds to a base station in the present embodiment.

For wireless LAN access points and wireless PAN access points, the base station name and identification information are information that can be acquired when the communication unit 30 can communicate with the base station.
For a mobile phone base station, at least one of the name and identification information of the base station and the location information of the base station are information that can be acquired when the communication unit 30 can communicate with the base station.

The intensity threshold t1 is used for comparison with the intensity P of the radio wave received from the base station in communication with the communication unit 30.
The intensity threshold t1 is the intensity of the radio wave received from the base station when the distance d between the base station in communication and the mobile terminal 1 is a predetermined distance (10 m or less) shorter than the GPS positioning error (several meters). Set to
Since a base station that covers a wide area has a higher output radio wave than a base station that covers a narrow area, the intensity threshold t1 is set to a larger value, and a base station that covers a narrow area A small value is set for t1.

  If the specifications and performance relating to the output of radio waves such as the electrolytic strength of each base station are examined in advance, an appropriate strength threshold t1 can be determined.

  In FIG. 2, base station names “ABC” and “HJK” are base stations covering a relatively wide area, a high-value strength threshold t1 is set, and base station name “WXYZ” is a relatively narrow area. An example in which a low intensity threshold t1 is set is shown.

  The communication unit 30 transmits and receives radio waves, and communicates with the above-described base stations (mobile phone base station, wireless LAN access point, wireless PAN access point).

The communication unit 30 receives identification information (or base station name) and position information of the mobile phone base station from the mobile phone base station, and measures the intensity P of the radio wave received from the base station.
The communication unit 30 may be configured to simultaneously receive identification information from a plurality of mobile phone base stations.

Further, the communication unit 30 receives the identification information of the base station from the access point of the wireless LAN or the access point of the wireless PAN, and measures the intensity P of the radio wave received from the base station.
Communication between the communication unit 30 and a base station (wireless LAN access point or wireless PAN access point) other than the mobile phone base station is performed by obtaining identification information of the base station and the intensity P of the radio wave received from the base station. This is for measurement, and the identification information is acquired without receiving a connection permission notification from the base station.

The display unit 40 displays the operation status by the operation unit 10, the communication status by the communication unit 30, and the location information of the mobile terminal 1 specified by the location specifying program.
The location information of the portable terminal 1 is specified based on the base station database DB1, information from the communication unit 30, and information from the satellite radio wave receiving unit 50.

  The satellite radio wave receiving unit 50 receives radio waves from positioning satellites such as GPS satellites and quasi-zenith satellites.

  The control unit 90 controls each unit, in particular, executes a position specifying program, and based on the information from the base station database DB1, the communication unit 30, and the information from the satellite radio wave receiving unit 50, the position of the mobile terminal 1 Is identified.

  Specifically, the control unit 90 includes any one of the base stations that are in communication with the communication unit 30 in the base station database DB1, and is included in the base station database DB1. When the intensity P of the radio wave received from the object is strong, the position of the base station and included in the base station database DB1 (or a predetermined position in the vicinity thereof) is set as the position of the mobile terminal 1 (the base station Among these, the first position specifying that specifies the position of the mobile terminal 1 based on the position information of the one included in the base station database DB1 and in which the communication unit 30 is in communication).

  If the conditions for performing the first position specification are not established and the number of satellites (satellites that have received radio waves) captured by the satellite radio wave receiving unit 50 is large, the position obtained by satellite positioning is set to the mobile terminal 1. (The second position is specified based on positioning using satellites).

  If the conditions for performing the first location specification and the second location specification are not established and the strength P of the radio wave received from the mobile phone base station in communication with the communication unit 30 is strong, the communication state with the communication unit 30 Is set as the position of the mobile terminal 1 (or the mobile terminal based on the position information of the mobile phone base station in which the communication unit 30 is in communication) 3rd position specification which specifies the position of 1).

  When the conditions for performing the first position specification and the second position specification are not established and the strength P of the radio wave received from the mobile phone base station in communication with the communication unit 30 is weak, the second time (for example, 1 Time) and the previously specified position (the position set by the first position specification, the second position specification, or the third position specification) is set as the position of the mobile terminal 1 (the first based on the position information specified immediately before). 4 position identification).

A procedure in which the control unit 90 executes the position specifying program and performs the first position specification to the fourth position specification will be described with reference to the flowchart of FIG.
The position specifying program is executed every third time (for example, 30 seconds) or when the user performs a manual operation for acquiring position information using the operation unit 10.

  Based on information from the communication unit 30, the control unit 90 determines whether any of the base stations in communication with the communication unit 30 is included in the base station database DB1 (step S11 in FIG. 3). reference).

For example, when one of the base stations in communication with the communication unit 30 is a mobile phone base station, the control unit 90 determines whether at least one of the identification information and the position information among the base stations included in the base station database DB1. Then, it is determined whether there is a match with the base station in the communication state.
When one of the base stations in communication with the communication unit 30 is a wireless LAN access point or a wireless PAN access point, the control unit 90 uses the base station included in the base station database DB1 for the identification information. Among these, it is determined whether or not there is a match with the base station in the communication state.

  When the base station in communication with the communication unit 30 is not included in the base station database DB1, the process proceeds to step S14.

  When the base station in communication with the communication unit 30 is included in the base station database DB1, the control unit 90 determines that the intensity P of the radio wave received from the base station is the base station in the base station database DB1. It is determined whether or not it is equal to or greater than the intensity threshold (first threshold) t1 corresponding to (see step S12 in FIG. 3).

  When the intensity P of the radio wave received from the base station is equal to or greater than the intensity threshold t1, the control unit 90 sets the position of the base station (or a predetermined position in the vicinity thereof) as the position of the mobile terminal 1 (first (Specification of position, see step S13 in FIG. 3).

In this case, the position of the portable terminal 1 can be specified with higher accuracy than the position information obtained by satellite positioning.
Although it is necessary to have the portable terminal 1 near the base station in the communication area of the base station included in the base station database DB1 so that the radio wave intensity P is higher than the intensity threshold t1, the base station database DB1 If the number of base stations included in is increased, the area where the position can be specified by the first position specification can be increased.

  Further, the control unit 90 determines that the number of satellites that have received radio waves (number of captured satellites) n is greater than or equal to a capture number threshold t2 (second threshold, for example, t2 = 4) based on information from the satellite radio wave receiver 50. (See step S14 in FIG. 3).

  When the number of captured satellites n is equal to or greater than the captured number threshold t2, the control unit 90 transmits information from the satellite radio wave receiving unit 50, that is, position information and radio wave transmission of satellites that have received radio waves via the satellite radio wave receiving unit 50. Based on the time, the position of the mobile terminal 1 is specified (second position specification, see step S15 in FIG. 3).

When the satellite capture number n is not equal to or greater than the capture number threshold t2, the control unit 90 determines that the intensity P of the radio wave received from the mobile phone base station in communication with the communication unit 30 is equal to or greater than a predetermined threshold (third threshold) t3. (See step S16 in FIG. 3).
The predetermined threshold t3 is set to a value larger than 0 and smaller than the strength threshold t1 of each mobile phone base station set in the base station database DB1.
Although the determination in step S16 may be performed immediately when the satellite capture number n is not equal to or greater than the capture number threshold t2, the satellite capture number n is not equal to or greater than the capture number threshold t2 for a fourth time (for example, 10 seconds). After the state continues, the determination in step S16 may be performed.

  When the intensity P of the radio wave received from the mobile phone base station in communication with the communication unit 30 is equal to or greater than the predetermined threshold t3, the control unit 90 determines the position of the mobile phone base station (or a predetermined position in the vicinity thereof). ) As the position of the mobile terminal 1 (third position identification, see step S17 in FIG. 3).

  In this case, it is possible to specify an approximate position using the position of a nearby base station even under conditions where the position information cannot be obtained accurately by satellite positioning.

  In addition, it is only necessary to compare the set threshold values (intensity threshold value t1 for each base station, capture number threshold value t2, predetermined threshold value t3) and measurement results (received radio wave intensity P, number of captured satellites n). It is possible to determine whether or not to specify the first position or the third position. For this reason, it is possible to perform position specification that supplements position specification based on satellite positioning by a simple comparison operation.

  In addition, the intensity P is detected in normal communication between the communication unit 30 and the base station in the mobile terminal 1, and the captured satellite number n is a normal value between the satellite radio wave receiving unit 50 and the satellite in the mobile terminal 1. Since it is detected in radio wave reception, it is not necessary to install special hardware in the portable terminal 1 in order to obtain such information, and it is possible to specify the first position by simply executing software (position identification program). It can be determined whether or not the third position is specified.

  If the intensity P of the radio wave received from the mobile phone base station in communication with the communication unit 30 is not equal to or greater than the predetermined threshold t3, the position (first position) specified within the second time (for example, one hour) and last time The position specified by specifying or the second position specifying or the third position specifying) is set as the position of the mobile terminal 1 (fourth position specifying, see step S18 in FIG. 3).

  When the intensity P of the radio wave received from the base station in communication is weak, it is not appropriate to set the position of the base station as the position of the mobile terminal 1 because the mobile terminal 1 is away from the base station. Although the possibility is high (the error is large), the position information obtained by specifying the first position immediately before is not the latest position information because the error is relatively small, but it is obtained by specifying the position immediately before. It is possible to specify an approximate position using the specified position.

Based on the map database DB2, the position specified at any one of the first position specification at step S13, the second position specification at step S15, the third position specification at step S17, and the fourth position specification at step S18 (current position) Is displayed on the display unit 40 (see FIG. 4).
If any of the first position specification to the fourth position specification conditions is not satisfied, such as being unable to communicate with a positioning satellite or a base station, being able to communicate with a base station, but being far away and having a weak radio wave intensity P, the position is It may be a form that displays that information cannot be specified.

In addition, it is desirable that the specified position is displayed on the map by a different display method (display method with different colors or display method in which the type is indicated with characters) for each position-specific type.
For example, the position specified by the first position specification is displayed in the state where the radius of the ring 41 indicating the error range is small with the first color (for example, blue), the second color (for example, green) and the error range is displayed. In a state where the radius of the ring 41 indicating medium is medium, the position specified by the second position specification is displayed, and in the state where the radius of the ring 41 indicating the error range is large in the third color (for example, red), The position specified by the 3 position specification is displayed, and the position specified by the 4th specification is displayed in a state where the radius of the ring 41 indicating the error range is large in the fourth color (for example, black). It is done.
Moreover, the form which the area | region 43 which shows a position specific classification with a character may be displayed.

  As a result, it is possible to easily visually recognize by which method the position is specified.

  Further, information on the specified position (including the position specifying type) is transmitted via the communication unit 30 to a server (not shown) that provides the position information.

  In the present embodiment, the position specifying program is installed in the recording unit 20 of the portable terminal 1 and the control unit 90 of the portable terminal 1 has been described as performing the first position specification to the fourth position specifying. The position specifying program may be installed in a communicable server, and the server may perform the first position specification to the fourth position specification.

DESCRIPTION OF SYMBOLS 1 Portable terminal 10 Operation part 20 Recording part 30 Communication part 40 Display part 41 Ring 43 The area | region which shows the classification of a position specific character 50 Satellite radio wave receiving part 90 Control part DB1 Base station database DB2 Map database

Claims (10)

A satellite signal receiver for receiving signals from positioning satellites;
A capture unit threshold for the number of captured satellites, which is the number of satellites that have received radio waves in the satellite radio wave receiver, and a recording unit for recording a predetermined threshold for radio field intensity from the base station;
A mobile terminal comprising a communication unit for communicating with the base station,
When the number of captured satellites is greater than or equal to the capture number threshold, the position of the mobile terminal is identified based on the position information and the radio wave transmission time of the satellite that can receive radio waves via the satellite radio wave receiver,
When the number of captured satellites is smaller than the captured number threshold, and the intensity of radio waves received from the mobile phone base station in which the communication unit is in a communication state among the base stations is greater than or equal to the predetermined threshold In addition, the position of the portable terminal is specified based on position information of a portable telephone base station in which the communication unit is in a communication state among the base stations. The recording unit records a base station database including identification information of the base station, position information of the base station, and information for each base station regarding an intensity threshold,
The base station that is in communication with the communication unit is included in the base station database, and the strength of radio waves received from the base station that is in communication with the communication unit is the strength threshold. Based on the position information of the base station that is included in the base station database and the communication unit is in a communication state when the base station database is equal to or more than the one corresponding to the base station in the base station database The mobile terminal according to claim 1, wherein a position of the mobile terminal is specified.   3. The mobile terminal according to claim 2, wherein any one of the intensity threshold values in the base station database corresponding to the mobile phone base station is set to a value larger than the predetermined threshold value.   The intensity threshold value for each base station in the base station database is a radio wave received from the base station when the distance between the base station and the mobile terminal in communication with the communication unit is 10 m or less. The mobile terminal according to claim 2, wherein the mobile terminal is set to strength. The base station is a wireless LAN access point, at least one of a wireless PAN access point, and the mobile phone base station, which is fixed at a specific location,
Communication between the communication unit and the wireless LAN access point is performed without receiving a connection permission notification from the wireless LAN access point,
The mobile terminal according to claim 2, wherein communication between the communication unit and the access point of the wireless PAN is performed without receiving a connection permission notification from the access point of the wireless PAN.   When the number of captured satellites is less than the captured number threshold, and the intensity of the radio wave received from the mobile phone base station in which the communication unit is in communication with the base station is not greater than or equal to the predetermined threshold. 2. The portable terminal according to claim 1, wherein a position specified within a certain time and specified last time is set as the position of the portable terminal. A display unit for displaying the specified position;
The display unit displays the specified position on a map by at least one of a display method in which a color is different for each position specifying type and a display method in which the position specifying type is indicated by characters. The mobile terminal according to claim 6. A satellite signal receiver for receiving signals from positioning satellites;
A capture number threshold for the number of captured satellites that is the number of satellites that have received radio waves at the satellite radio wave receiver, a predetermined threshold for radio field intensity from a base station, identification information for the base station, and position information for the base station, A recording unit for recording a base station database including information for each base station regarding an intensity threshold;
A mobile terminal comprising a communication unit for communicating with the base station,
The base station that is in communication with the communication unit is included in the base station database, and the strength of radio waves received from the base station that is in communication with the communication unit is the strength threshold. And if it is greater than or equal to the one corresponding to the base station in the base station database, based on position information of the base station that is included in the base station database and the communication unit is in a communication state The position of the mobile terminal is identified,
The base station that is in communication with the communication unit is not included in the base station database, or the radio wave intensity received from the base station that is in communication with the communication unit is If the intensity threshold is not greater than or equal to that corresponding to the base station in the base station database and the number of captured satellites is greater than or equal to the capture number threshold, radio waves are received via the satellite radio wave receiver. Based on the position information of the satellite and the radio wave transmission time, the position of the mobile terminal is identified,
The base station that is in communication with the communication unit is not included in the base station database, or the radio wave intensity received from the base station that is in communication with the communication unit is An intensity threshold that is not greater than that corresponding to the base station in the base station database, wherein the number of captured satellites is less than the captured number threshold, and the communication unit of the base stations is in a communication state. When the intensity of the radio wave received from a certain mobile phone base station is equal to or greater than the predetermined threshold, the mobile terminal is configured based on the location information of the mobile phone base station in which the communication unit is in communication with the base station. A mobile terminal characterized in that a position is specified. A satellite radio wave receiver for receiving radio waves from positioning satellites, a capture number threshold for the number of captured satellites that is the number of satellites received by the satellite radio wave receiver, a predetermined threshold for radio wave intensity from the base station, A portable terminal having a recording unit for recording the base station identification information, the base station position information, and a base station database including information for each base station regarding an intensity threshold, and a communication unit for communicating with the base station A location method of
The base station that is in communication with the communication unit is included in the base station database, and the strength of radio waves received from the base station that is in communication with the communication unit is the strength threshold. Based on the position information of the base station that is included in the base station database and the communication unit is in a communication state when the base station database is equal to or more than the one corresponding to the base station in the base station database A first position specifying step for specifying the position of the mobile terminal;
The base station that is in communication with the communication unit is not included in the base station database, or the radio wave intensity received from the base station that is in communication with the communication unit is When the intensity threshold is not greater than or equal to the one corresponding to the base station in the base station database and the number of captured satellites is greater than or equal to the capture number threshold, radio waves are received via the satellite radio wave receiver. A second position specifying step of specifying the position of the mobile terminal based on the position information of the satellite and the radio wave transmission time;
The base station that is in communication with the communication unit is not included in the base station database, or the radio wave intensity received from the base station that is in communication with the communication unit is An intensity threshold that is not greater than that corresponding to the base station in the base station database, wherein the number of captured satellites is less than the captured number threshold, and the communication unit of the base stations is in a communication state. When the intensity of the radio wave received from a certain mobile phone base station is equal to or greater than the predetermined threshold, the mobile terminal base station is based on the location information of the mobile phone base station in the communication state of the base station. A position specifying method comprising a third position specifying step of specifying a position. A satellite radio wave receiver for receiving radio waves from positioning satellites, a capture number threshold for the number of captured satellites that is the number of satellites received by the satellite radio wave receiver, a predetermined threshold for radio wave intensity from the base station, A portable terminal having a recording unit for recording the base station identification information, the base station position information, and a base station database including information for each base station regarding an intensity threshold, and a communication unit for communicating with the base station A position location program,
The base station that is in communication with the communication unit is included in the base station database, and the strength of radio waves received from the base station that is in communication with the communication unit is the strength threshold. Based on the position information of the base station that is included in the base station database and the communication unit is in a communication state when the base station database is equal to or more than the one corresponding to the base station in the base station database A first position specifying step for specifying the position of the mobile terminal;
The base station that is in communication with the communication unit is not included in the base station database, or the radio wave intensity received from the base station that is in communication with the communication unit is When the intensity threshold is not greater than or equal to the one corresponding to the base station in the base station database and the number of captured satellites is greater than or equal to the capture number threshold, radio waves are received via the satellite radio wave receiver. A second position specifying step of specifying the position of the mobile terminal based on the position information of the satellite and the radio wave transmission time;
The base station that is in communication with the communication unit is not included in the base station database, or the radio wave intensity received from the base station that is in communication with the communication unit is An intensity threshold that is not greater than that corresponding to the base station in the base station database, wherein the number of captured satellites is less than the captured number threshold, and the communication unit of the base stations is in a communication state. When the intensity of the radio wave received from a certain mobile phone base station is equal to or greater than the predetermined threshold, the mobile terminal base station is based on the location information of the mobile phone base station in the communication state of the base station. A position specifying program comprising a third position specifying step for specifying a position.

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