JP2001330657A - System for grasping position of phs or portable telephone - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a system graspable the position of a PHS or a portable telephone. SOLUTION: The difference of distance is calculated on the basis of the difference between radio-wave arrival times from a transmitter 104 in two receiving points 101, 102 of receivers A, B. The position of the transmitter 104 is found on hyperbolic lines 105, 106 which have the two receiving points 101, 102 as focuses. Regarding the receiving point 103 of a third receiver C, similar hyperbolic lines 107, 108, 109, 110 are found between the receivers A, B. The point of intersection of the three hyperbolic lines is found. Thereby, the position of the PHS or the portable telephone is grasped. Information on the grasped position can be collated as character information or image information by a personal computer or the portable telephone through the Internet.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a system for detecting the position of a PHS or a portable telephone.

[0002]

2. Description of the Related Art There is a method of ascertaining a base station where a PHS or a mobile phone is located and providing information on an area covered by the base station.

There is also a method in which a PHS or a mobile phone has a GPS function, and the latitude and longitude of the own station are grasped by radio waves from a satellite. The transmission delay time of a radio wave from a known satellite is measured, and the distance is converted from the transmission speed of the radio wave. Points at a certain distance from the satellite are continuously captured as spherical surfaces.
Similarly, the distance from the other two satellites is obtained, and the intersection of the three spherical surfaces is calculated as the location of the own station.

[0004] Incidentally, although it is not a system for detecting the position of a PHS or a mobile phone, there are the following related technologies. This is hyperbolic navigation as radio navigation. Location is known 2
The arrival time difference of radio waves from two transmission points is measured. The position where the arrival time difference is constant becomes a hyperbola having two transmission points as focal points. Similarly, the arrival time difference between radio waves radiated from another pair of radio sources is measured, and a hyperbola having two transmission points as focal points is calculated. The intersection of the two sets of hyperbolas indicates the position of the radio wave receiving point.

[0005] There is also a technique for locating the position of a mobile station using hyperbolic navigation (Japanese Patent Laid-Open No. 6-3428). A master station and a plurality of relay stations receive a first measurement signal from one mobile station, and each relay station transmits a second measurement signal at the same frequency after a unique delay time that does not overlap, and When the station receives the first measurement signal from the mobile station and the second measurement signal from the relay station and measures the arrival time difference or phase difference, the first measurement signal is transmitted to the master station. The relative time difference between the received time and the time received by each relay station is calculated, and the position of the mobile station is calculated by hyperbolic navigation.

[0006]

The method of detecting the positions of the PHS and the mobile phone from the information of the base station where the PHS and the mobile phone are located has only a function of providing information on the area covered by the base station, and is a pinpoint. There is a disadvantage that the location information cannot be provided.

[0007] Regarding the method of incorporating the GPS function into the PHS and the portable telephone, the GPS function is incorporated into the portable device,
The disadvantage is that the equipment is heavy, large and expensive. Third parties other than PHS and mobile phone holders
There is a demerit that it is necessary to transfer position information addressed to a third party again from the GPS receiving device in order to know the transmission place of the radio wave.

[0008] Hyperbolic navigation requires a dedicated device for grasping the radio wave of the radio wave source and an arithmetic device for calculating the reception position in the receiver, and cannot be dealt with by ordinary PHS or mobile phone itself. In addition, it can be used only in an area having a known radio wave source. Furthermore, in order to transmit the position information to a third party other than the recipient, the information must be transferred again from the receiving device.

[0009] Regarding the method of locating the position of the mobile station using the hyperbolic method, it is necessary to transfer the signal from the relay station to the master station when utilizing the resources of the existing PHS and mobile phone base stations. The correction load of the base station system is high. In addition, in the case of existing PHS and mobile phone systems in which a large number of base stations are gathered, it is not clear which base station is to be the master station, and the received radio wave from the mobile station must be forwarded to all surrounding base stations. Will not get.

[0010]

Means for Solving the Problems A reception time for grasping the reception time of a radio wave from a clock section which previously synchronizes the time of a clock among three receivers and a radio wave reception section for receiving radio waves of a PHS and a mobile phone. Three receivers with grasping parts are installed,
The reception times of the radio waves transmitted from the same PHS and the mobile phone are transmitted to the calculation unit, and the difference between the reception times obtained from a pair of receivers is multiplied by the transmission speed of the radio waves to obtain the distance. The radio wave transmission point where the difference in the distance from the two reception points is a constant value is found on a hyperbola with the two reception points as focal points, and the radio wave transmission point is similarly determined from the remaining two combinations of receivers in the same procedure. From a calculation unit that grasps on two different sets of hyperbolas and obtains an intersection point where the three sets of hyperbolas intersect at one place, and a transmission position display unit that displays the radio wave transmission point on a display device Composed of PHS,
It is characterized by grasping the position information of the mobile phone.

[0011] It is characterized in that a radio wave receiving unit, a clock unit, and a receiving time grasping unit are provided as one function of a base station of an existing PHS and mobile phone system.

[0012] In claim 1, when there are a plurality of intersections obtained from three types of hyperbolas, an intersection closest to a receiver having the strongest electric field among three receivers is determined to determine a radio wave transmission point. It is characterized by having an operation unit.

[0013] From one set of receivers, from the equidistant point, PH
S: When a radio wave is transmitted from a mobile phone and a radio wave transmission point is obtained in the procedure shown in claim 1, the calculation unit checks the time transmitted from the reception time grasping unit, and there is a time mismatch. Further, when performing the hyperbolic calculation in the subsequent calculations, the time correction for the mismatch time is performed to ensure the accuracy of the position information.

[0014] The location name, the lot number information and the image information of the map, which are determined by taking the information of the radio wave transmitting point from the direction and distance from the radio wave transmitting point or the map information, are used as a database, and the transmission position display provided from the Internet Web site is provided. It is characterized by having a part.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION
S, input a telephone number to a mobile phone, and make a call. At this time, radio waves for PHS and mobile phone calls are transmitted from the nearest base station, and the PH shown in FIG.
S, a radio wave is emitted from the transmitter D104 of the mobile phone.
The telephone numbers included in this radio wave are transmitted to the receivers A101, B102, C
103 is received by the radio wave receiving units 502, 506, and 510 shown in FIG. At this time, only the direct wave transmitted on the straight line is received from the transmitter D, and the reflected wave is not considered.

The clocks of the clock units 503, 507, and 511 shown in FIG. 5 are synchronized in time among the receivers A101, B102, and C103 shown in FIG. As a result, the difference between the transmission speeds of the emitted radio waves among the receivers A, B, and C can be accurately grasped from the transmitter D104.

[0017] The reception time grasping units 504, 508, and 512 in FIG. 5 grasp the telephone number and the reception time received by the radio wave receiving unit and transmit them to the calculation unit 513. The radio wave receiving units 502, 506, 510, the clock units 503, 507, 511, and the reception time grasping units 504, 508, 512 are respectively provided as one function in the existing base station system of the PHS and the mobile phone system, and as a special case. The receiver may be provided independently of the base station system. The area of the area covered by one base station is PHS rather than mobile phone
Is smaller and the range of radio waves transmitted from the mobile station reaches P
HS is smaller than mobile phone. Therefore, the combination most likely to supplement the radio wave of one transmitter with a plurality of receivers (base stations) is that the mobile station is a mobile phone and the base station is a PHS
This is a combination that utilizes the system. This is a combination in which a receiving section of the mobile phone is added to the receiving section of the PHS base station. & nbs
p;

[0018] The receivers A201, B202 and the transmitter D20 shown in FIG.
The difference between the distances (| DA−DB |) to the receivers A201 and B20
The difference is calculated by multiplying the difference between the reception times received from the reception time grasping units 504 and 508 by the radio wave transmission speed. At this time, the transmitter D
204 is a hyperbola a focusing on the receivers A201 and B202.
b205 or 206. Similarly, in FIG. 3, the positions of the receivers B302 and C303 and the transmitter D30
4 and the same process is performed.
It will be present on any of the hyperbolas bc 305 and 306 with the focus on 302 and C 303. Similarly, in FIG.
Similar processing is performed between the positions of the receivers A and C and the transmitter D, and the transmitter D404 is present on any of the hyperbolas ac405 and 406 having the receivers A401 and C403 as focal points. A point where the above three sets of hyperbolas intersect at one location is information indicating the position of the transmitter D. In the example of FIG.
The intersection Z where b106, bc108 and ac110 intersect is the transmitter D1
It can be determined that the location is 04.

As a result of calculating the intersections of the three sets of hyperbolas, if there are a plurality of intersections, among the receivers A, B, and C, the receiver having the strongest electric field of the radio wave emitted from the transmitter D is determined, and the reception thereof is performed. The intersection closest to the device is determined as the location of the transmitter D.

[0020] From a point equidistant from receivers A and B, PH
S, the mobile phone transmits a radio wave as test data, and the radio waves are received by the radio wave receiving units 502, 506, and 510 of the receivers A and B. At this timing, the time measured by the clock units 503, 507, and 511 should be the same time.However, the operation unit 513 checks the time, and when there is a deviation, the time received from each receiver. Is corrected. For example, when the time of the receiver A is larger than the time of the receiver B by t, the clock of the receiver A is ahead of the clock of the receiver B by t, and the subsequent A and B are focused. In the hyperbolic calculation described above, the time relating to A is subtracted by t and used. Similarly, correction is performed for the receivers A and C and B and C.

With respect to the position information of the transmitter D calculated by the arithmetic unit, directions and distances from the receivers A, B, and C are displayed on the display device of FIG. Also, the position of the receivers A, B, and C is determined on the map by taking in the map information, and the position and the distance from the receivers are calculated to determine the position of the transmitter D on the map. Transmitter D obtained in this way
The method of converting the location of the transmitter D into the place name / place number information from the map information and providing the information as character information, and the method of providing the map information around the location of the transmitter D as image information and providing the position information of the transmitter D There is. This display function is provided not only by a dedicated display device but also by using the Internet from a personal computer or a mobile phone such as an I-mode, as shown in the Internet input screen of FIG. 6 and the output screen of FIG.
Information can be provided through the site. At this time, the database shown in FIG. 8 is once created by this system and browsed on the Internet. When providing information on a Web site, from the viewpoint of security, a request for input of a target telephone number and a password is made to prevent a third party from viewing the information.

The following cases are conceivable as examples of the application area of this system. By having a wandering elderly person carry a PHS and a mobile phone, it is possible to determine the position information of the elderly person by calling the PHS and the mobile phone when necessary. In addition, when a mobile phone holder, such as an I-mode user, wants to know his / her current location, he / she makes a call to a specific telephone number, and the location information determined by this system is transmitted from a web site via a mobile phone. It can be received as information or image information such as a map. In addition, since this system grasps the location of an individual, it operates based on the consent of the individual from the viewpoint of privacy protection.

[Effect] When grasping the position of the PHS and the mobile phone, the PH
S, there is no need to add a special device such as GPS to the mobile phone, and when a third party other than the PHS or mobile phone holder knows the location information, it is necessary to transfer the location information from the PHS or mobile phone. do not do.

[Brief description of the drawings]

FIG. 1 is an overall diagram showing a mechanism for ascertaining the position of a transmitter D from receivers A, B, and C.

FIG. 2 is a diagram showing a mechanism for grasping the position of a transmitter D from receivers A and B.

FIG. 3 is a diagram showing a mechanism for grasping the position of a transmitter D from receivers B and C.

FIG. 4 is a diagram showing a mechanism for grasping the position of a transmitter D from receivers A and C.

FIG. 5 is an overall schematic diagram showing a functional configuration of an embodiment of the present invention.

FIG. 6 is a diagram showing an Internet input screen for displaying a transmission position.

FIG. 7 is a diagram showing an Internet output screen displaying a transmission position.

FIG. 8 is a diagram showing a transmission position display database.

[Explanation of symbols]

 101 receiver A 102 receiver B 103 receiver C 104 transmitter D 105 hyperbolic ab 106 hyperbolic ab 107 hyperbolic bc 108 hyperbolic bc 109 hyperbolic ac 110 hyperbolic ac 201 receiver A 202 receiver B 203 receiver C 204 transmitter D 205 hyperbolic ab 206 hyperbolic ab 301 receiver A 302 receiver B 303 receiver C 304 transmitter D 305 hyperbolic bc 306 hyperbolic bc 401 receiver A 402 receiver B 403 receiver C 404 transmitter D 405 hyperbolic ac 406 hyperbolic ac 501 antenna 502 radio wave receiving section 503 clock section 504 receiving time grasp section 505 antenna 506 radio wave receiving section 507 clock section 508 receiving time grasp section 509 antenna 510 radio wave receiving section 511 clock section 512 receiving time grasp section 513 calculation section 514 transmission position display section

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2F029 AA07 AC01 AC02 AC04 AC06 AC14 5J062 AA08 AA13 BB05 CC12 CC18 FF01 HH07 5K027 AA11 AA12 BB01 BB09 BB14 CC08 EE01 EE15 FF01 FF22 GG08 HH00 MM17 503 FF06 FF23 GG11

Claims (7)

[Claims] 1. A timekeeping unit for synchronizing the time of a clock among three receivers in advance, and a reception time grasping unit for grasping the reception time of a radio wave from a radio wave receiving unit for receiving radio waves of a PHS and a mobile phone. Three receivers, transmit the reception time of the radio wave transmitted from the same PHS and mobile phone to the calculation unit, and multiply the difference of the reception time obtained from one set of receivers by the transmission speed of the radio wave By calculating the distance, the radio wave transmission point where the difference between the distances from the two reception points is a constant value is
A radio wave transmission point is obtained on two different sets of hyperbolas in the same procedure from the remaining two sets of receivers in the same manner, and the three sets of hyperbolas are determined at one place. A position grasping system for a PHS and a mobile phone, comprising a calculation unit for grasping a radio wave transmitting point by finding an intersection to intersect, and a transmission position display unit for displaying the radio wave transmitting point on a display device. 2. The PHS / cellular phone location as claimed in claim 1, wherein a radio wave receiving section, a clock section, and a reception time grasping section are provided as one function of an existing PHS / cell phone base station. system. 3. The method according to claim 1, wherein when there are a plurality of intersections obtained from three types of hyperbolas, an intersection closest to a receiver having the strongest electric field among the three receivers is obtained.
2. The system according to claim 1, further comprising a calculation unit for determining a radio wave transmission point. 4. From a set of receivers, P
When a radio wave is transmitted from an HS or a mobile phone and a radio wave transmission point is obtained by the procedure described in claim 1, the calculation unit collates the time sent from the reception time grasping unit, and there is a time mismatch. When performing hyperbolic calculations in subsequent operations,
2. The PH according to claim 1, wherein the accuracy of the position information is ensured by performing time correction for the mismatch time.
S, Positioning system for mobile phones. 5. A transmission that is provided from an Internet Web site using a place name, a lot number information, and a map image information that are determined by taking in information of a radio wave transmission point and a direction and a distance from the radio wave transmission point or by taking in map information. 2. The system according to claim 1, further comprising a position display unit. 6. A timekeeping unit for previously synchronizing the time of a clock among three receivers, and a reception time grasping unit for grasping the reception time of a radio wave from a radio wave reception unit for receiving radio waves of a PHS and a mobile phone. Three receivers, transmit the reception time of the radio wave transmitted from the same PHS and mobile phone to the calculation unit, and multiply the difference of the reception time obtained from one set of receivers by the transmission speed of the radio wave By calculating the distance, the radio wave transmission point where the difference between the distances from the two reception points is a constant value is
A radio wave transmission point is obtained on two different sets of hyperbolas in the same procedure from the remaining two sets of receivers in the same manner, and the three sets of hyperbolas are determined at one place. A method for ascertaining the positions of a PHS and a mobile phone, comprising a calculation unit for determining a radio wave transmission point by obtaining an intersection, and a transmission position display unit for displaying the radio wave transmission point on a display device. 7. A timekeeping unit for previously synchronizing the time of a clock among three receivers, and a reception time grasping unit for grasping the reception time of a radio wave from a radio wave reception unit for receiving radio waves of a PHS and a mobile phone. Three receivers, transmit the reception time of the radio wave transmitted from the same PHS and mobile phone to the calculation unit, and multiply the difference of the reception time obtained from one set of receivers by the transmission speed of the radio wave By calculating the distance, the radio wave transmitting point where the difference between the distances from the two receiving points is a constant value is set to 2
A radio wave transmission point is obtained on two different sets of hyperbolas by the same procedure from the remaining two sets of receivers in the same manner, and the three sets of hyperbolas are determined on the hyperbola having two reception points as focal points.
A PHS, which is composed of an arithmetic unit for ascertaining the radio wave transmitting point by obtaining an intersection at which the radio wave transmitting point intersects and stores it in a storage device, and a transmission position display unit for displaying the radio wave transmitting point on a display device
A computer-readable recording medium on which a program for causing a mobile phone to be located is recorded.