JP2002139341A - Terminal and position information display method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily grasp error information about position using a portable telephone. SOLUTION: In a control part of a portable telephone, display processing for a position (latitude and longitude) in a liquid crystal panel 20 is conducted. Thus, in the liquid crystal panel, according to the map information retrieved on the basis of a map data base, a position-measuring result point display 301 corresponding to the latitude and the longitude is displayed. In addition to the above, as error information, a circular area display 302 where the radius around the position measuring result point display 301 as the center is defined as position error information Er is made.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a terminal for displaying position information.

[0002]

2. Description of the Related Art Conventionally, for example, a communication terminal having a built-in GPS receiver (hereinafter, referred to as a GPS communication terminal) is carried by the other party, and the user's communication terminal receives location information transmitted from the GPS communication device. Is received, and the received position information is displayed as a dot on a display panel. This allows
For the user, his / her own communication terminal can grasp the position information of the other party who carries the GPS-equipped communication terminal.

[0003]

However, in the above-mentioned communication apparatus with GPS at the other end, when positioning information is received, transmission signals from each of a plurality of artificial satellites are received. Causes an error in the position information. That is, the error in the position information changes according to the reception state of the transmission signal.

In the user's communication terminal, for example, as shown in FIG. 11, the position information including the error is displayed on the display panel as a dot.
The actual destination indicated by 0 and the positioning result point 301 may be different. For this reason, when grasping the location information of the other party by the user's communication terminal, the accuracy (certainty of the location information) of the location information of the other party is unknown, which is inconvenient in grasping the location information of the other party. Is generated.

[0005] In view of the above, it is an object of the present invention to provide a terminal capable of easily grasping position error information.

[0006]

In order to achieve the above object, the present invention provides a terminal (1A) having a display unit (20), which receives a position information signal indicating position information, and receives the position information signal. Control means (120) for controlling the display unit so that the position is displayed on the map information in accordance with the signal; the control unit transmits the position error information in accordance with the position information signal together with the position to the map information; The display unit is controlled so as to be displayed above. Thus, the display unit displays the position and the error information thereof together with the map information, so that the user can easily grasp the position error information.

More specifically, as in the second aspect of the present invention, the control section may control the display section to display error information in both the latitude and longitude directions of the position. . Further, as in the invention according to claim 3, in addition to the error information in the latitude and longitude directions, to control the display unit to display the error information in the height direction of the position,
The display unit displays error information in the latitude, longitude, and height directions along with the map information, so that the user can accurately grasp the error information. For example, as in the invention described in claim 4, the control unit may control the display unit to display the error information in a substantially circular shape centered on the position.

Further, according to the invention described in claim 5, the first terminal (1) having a display section (20) and an operation section (30).
A) transmits a request signal for requesting position information of the second terminal (1B) in response to a user operation on the operation unit.
Step (100), a second terminal receiving a request signal and transmitting a position information signal indicating position information (200, 210), and a first terminal receiving a position information signal. And a third step (140, 150) of displaying the position and error information of the position on the display unit together with the map information in accordance with the received position information signal. As described above, the display unit of the first terminal displays the position of the second terminal, the error information thereof, and the map information, so that the user can easily grasp the position error information.

Specifically, in the second step, in the second step, the second terminal transmits the transmission signal from each of the artificial satellites (# 1 to # 4) and its transmission signal. Position information may be obtained according to the reception level. Also,
As in the invention according to claim 7, in the third step,
The first device may determine the error information according to the received position information signal.

[0010] Incidentally, the reference numerals in parentheses of the above means are examples showing the correspondence with specific means described in the embodiments described later.

[0011]

(First Embodiment) FIG. 1 shows a first embodiment of a child security system using a portable telephone according to the present invention.
1 shows an embodiment. FIG. 1 shows a schematic configuration of a child security system.

As shown in FIG. 1, the child security system includes mobile phones 1A and 1B, base stations 2A and 2B, and a control center 3. The mobile phone 1A is
The mobile phone 1B is carried by the child in advance, and is carried by the child in advance. The base station 2A receives a transmission signal from the mobile phone 1A using a radio wave as a medium and outputs the transmission signal to the control center 3, while the base station 2A uses the transmission signal from the control center 3 as a radio wave as a medium. 1
Send to A. The base station 2B receives a transmission signal using the radio wave from the mobile phone 1B as a medium and outputs the transmission signal to the control center 3, while the base station 2B uses the transmission signal from the control center 3 as a medium using the radio wave as a medium. Send to phone 1B. The control center 3 performs control processing of each transmission signal from the base stations 2A and 2B.

Here, an example in which the mobile phone 1A is taken out of the mobile phones 1A and 1B will be described with reference to FIG.
FIG. 2 is a front view of the mobile phone 1A. The mobile phones 1A and 1B have the same configuration. Mobile phone 1A
Is a flat case 10, a liquid crystal panel (display unit) 20,
And a key operation unit 30. The key operation unit 30 is disposed on the front surface 11 side of the case 10. Key operation unit 30
Has various keys such as a transmission key, a function key “F”, and ten keys “0” to “9”. LCD panel 2
0 is disposed in the opening 12 of the surface 11 of the case 10.

Hereinafter, the electric circuit configuration of the portable telephone will be described with reference to FIG. FIG. 3 is a block diagram showing an electric circuit configuration. As shown in FIG. 3, the mobile phone includes an antenna 40, a radio unit 50, an audio processing unit 60, a microphone 70, a receiver 80, a memory 90, a GPS antenna 100, and a GP.
It comprises an S receiver 110 and a control unit 120. The microphone (transmitter) 70 converts the voice of the user (user) into a transmit voice signal and outputs the signal to the voice processor 60. The receiver (receiver) 80 outputs the received voice from the other party based on the received voice signal from the voice processor 60.

The voice processing unit 60 is controlled by the control unit 120 to convert a demodulated signal from the radio unit 50 into a received voice signal and output it from the receiver 80,
Is converted into an outgoing signal and output to the radio unit 50. The radio unit 50 converts the received call signal received through the antenna 40 into a demodulated signal and outputs the demodulated signal to the voice processing unit 60, while modulating the outgoing signal from the voice processing unit 60 and transmitting the transmitted communication signal to the antenna 40. Outgoing via Further, the radio unit 50 transmits a reply signal and the like, which will be described later, under the control of the control unit 120. The memory 90 includes a control unit 120
Map database 9 with computer programs
Hold 1

The GPS antenna 100 is connected to a GPS satellite #i
(I = 1... N), receiving a carrier (transmission signal) from each of the electromagnetic waves as a medium, and outputting each carrier signal based on each carrier to the GPS receiver 110. Further, the GPS receiver 110 is controlled by the control unit 120 to obtain position information information indicating its own position based on the carrier signal from each of the GPS antennas 100. Thereby, the GPS receiver 110 calculates the latitude and longitude at its own position. The control unit 120 includes a microcomputer or the like, and performs a call process and other various processes.

The operation of the first embodiment will be described below with reference to FIG. FIG. 4 shows mobile phones 1A and 1B.
The operation of each control unit 120 is shown. Mobile phone 1A, 1
Each of the control units 120 of B performs processing according to the flowchart shown in FIG.

First, in the portable telephone 1A, "F1" (function key "F" and ten-key "1") is key-inputted according to the operation of the key operation unit 30, and a telephone number is input by key-in. The control unit 120 performs a process of transmitting a position request signal to the telephone number entered by the key (step 100). Thereby, the radio unit 50 is controlled by the control unit 120 to transmit the position request signal to the antenna 40.
Transmits to the base station 2A using radio waves as a medium. here,
The position request signal includes a telephone number together with the identification code. Thereafter, the location request signal is transmitted to the base station 2B via the control center 3 through the base station 2A, and the base station 2B transmits the location request signal to the mobile phone 1B using radio waves as a medium.

Next, in the mobile phone 1B, the base station 2B
When the wireless communication unit 50 receives a position request signal from the wireless communication unit 50 via the antenna 40, the control unit 120 performs positioning processing by the GPS receiver 110 (step 200). However, the identification code is used to identify the position request signal.
Further, when the position request signal is received, the fact that the position request signal has been received from the destination of the telephone number may be notified using the telephone number included in the position request signal.

Here, the specific processing of the positioning processing in the control unit 120 will be described. First, the GPS antenna 100 receives a carrier from each of the GPS satellites #i (i = 1... N) using an electromagnetic wave as a medium, and outputs each carrier signal based on each carrier to the GPS receiver 110. Then, the GPS receiver 110 is controlled by the control unit 120 to obtain position information indicating its own position based on the carrier signal from each of the GPS antennas 100. That is, the latitude and longitude are calculated as the position information of the mobile phone 1B.
In addition, the GPS receiver 110 has a GPS satellite #i
(I = 1... N) received power sv # i of the carrier wave
(I = 1... N) and GPS satellite #i (i = 1.
n) Horizontal placement error HDOP and GPS in n)
Vertical placement error V in satellite #i (i = 1... N)
Next, in the mobile phone 1B, the control unit 120 performs a process of transmitting a reply signal to the position request signal with the telephone number included in the position request signal as a destination (step 210). Thereby, the wireless unit 50
A reply signal is transmitted from the antenna 40 with the telephone number as a transmission destination using radio waves as a medium. However, the return signal signal includes the latitude and longitude indicating its own position, the received power sv # i (i = 1... N) of each carrier, and the placement errors HDOP and VD.
OP is included. Thereafter, a reply signal is transmitted to the base station 2A via the control center 3 through the base station 2B, and the base station 2A transmits the reply signal to the mobile phone 1A using a radio wave as a medium.

Next, when the control unit 120 of the portable telephone 1A receives a reply signal (position information signal) from the base station 2A via the radio unit 50 through the antenna 40 (step 120), the control unit 120 corresponds to the latitude and longitude in the reply signal. The map information to be searched is searched based on the map database 91 (step 130). In addition, error information of latitude and longitude in the return signal is calculated (step 140). Specifically, the reception power sv # i (i = 1... N) of the carrier from each of the GPS satellites #i (i = 1... N) and the arrangement error of the GPS satellites #i (i = 1. HDOP, VDOP,
The position error information Er is obtained by substituting into the expression shown in Expression 1. Note that α and β are predetermined coefficients, respectively.

[0022]

Er = f (sv # 1, sv # 2, sv # 3... Sv # n) =） (sv # 1 + sv # 2 + sv # 3... Sv # n) /
n｝ + α · HDOP + β · VDOP Next, the control unit 120 of the mobile phone 1A performs display processing of the position of the mobile phone 1B (child) and error information (step 150). As a result, as shown in FIG. 5A, the positioning result point display 301 corresponding to the latitude and longitude is displayed on the liquid crystal panel 20, together with the map information retrieved based on the map database 91, as described above. In addition to this, as shown in FIGS. 5A and 5B, a circular area display with the positioning result point display 301 as the center and the radius as the position error information Er is performed as the error information.

As described above, the liquid crystal panel 2 of the mobile phone 1A
At 0, a substantially circular area is displayed as error information together with the position of the mobile phone 1B carried by the child (positioning result point display 301), so that the child manager can easily grasp the error information of the position information. it can.

(Second Embodiment) In the first embodiment,
Although an example in which a circular area is displayed as the error information of the position information on the liquid crystal panel 20 has been described, the present invention is not limited to this, and an elliptical area may be displayed. That is, in the second embodiment, the control unit 120 of the mobile phone 1B is used.
The positioning processing (step 200) includes: latitude and longitude as position information, received power sv # i (i = 1... N),
In addition to the placement errors HDOP and VDOP, GPS satellite #i
Position information yi (i = 1... N) at (i = 1.
xi (i = 1... n) is obtained. However, the position information yi (i
= 1... N) indicates the position information in the latitude direction, and the position information x
i (i = 1... n) indicates position information in the longitude direction.

For example, FIGS. 6 and 7 show examples in which positioning is performed based on carrier waves from each of four GPS satellites #i (i = 1... 4). That is, in FIG. 6, in x (longitudinal direction) -y (latitude direction) coordinates with respect to the mobile phone 1B,
Distance y in the y direction of each of GPS satellites #i (i = 1... 4)
i (i = 1... 4) is obtained. In addition to this, in FIG.
In the xy coordinates based on the mobile phone 1B, the GPS
Distance xi (i) in the x direction of each of satellites #i (i = 1... 4)
= 1 ... 4). Then, position information yi, xi (i = 1... 4) is added to the reply signal.

Next, the control unit 120 of the portable telephone 1A performs an elliptical area display process based on the return signal to which the above-mentioned position information yi, xi (i = 1... 4) is added. . Specifically, the reception power s of the carrier wave
v # i (i = 1... 4) and GPS satellite #i (i = 1.
4) Allocation error HDOP, VDOP, GPS satellite #i
(I = 1... 4) position information yi, xi (i = 1.
4) is substituted into Equations 2 and 3, and the y direction (latitude direction)
And error information Ex in the x direction (longitudinal direction).

[0027]

Ey = sv # 1 · y1 + sv # 2 · y2 + sv
# 3 · y3 + sv # 4 · y4 + α · HDOP

[0028]

## EQU3 ## Ex = sv # 1.x1 + sv # 2.x2 + sv
# 3.x3 + sv # 4.x4 + α.HDOP Here, as shown in FIG. 8B, an elliptical shape having Ey as a dimension in the y direction and Ex as a dimension in the x direction is used as error information of position information. As shown in FIG. 8A, the elliptical area display 302a is displayed on the liquid crystal panel 20.

(Third Embodiment) In the second embodiment,
Although an example in which the position error information is of two-dimensional coordinates (xy coordinates) has been described, the present invention is not limited to this.
An area display of the position error of the dimensional coordinates may be performed. However, in the third embodiment, map information indicating elevation (height information) using contour lines is employed.

First, the positioning process (step 200) of the control unit 120 of the mobile phone 1B includes latitude and longitude, received power sv # i (i = 1... N), placement errors HDOP and VD.
OP, position information yi, xi (i = 1... N), height information (elevation) of mobile phone 1B, and height in GPS satellite #i (i = 1... N) based on mobile phone 1B. The direction information hi (i = 1... N) is obtained.

For example, in FIG. 9, four GPS satellites #i
An example in which positioning is performed based on carrier waves from each of (i = 1... 4) is shown. That is, in FIG. 9, the height hi (i = 1... 4) of each of the GPS satellites #i (i = 1... 4) based on the mobile phone 1B is obtained. The return signal of the third embodiment is different from the return signal (position information signal) of the second embodiment in that the height hi (i =
1 ... 4) are added.

The control unit 120 of the mobile phone 1A obtains height direction error information Eh in addition to the yx direction error information Ey and Ex. That is, as the error information Eh, the height information hi (i = 1... 4) and the placement error VDO
P is obtained by substituting Equation 4.

[0033]

Eh = sv # 1 · h1 + sv # 2 · h2 + sv
# 3 · h3 + sv # 4 · h4 + α · VDOP Next, display processing of position information and position error information on the liquid crystal panel 20 is performed. More specifically, in addition to the map information indicating the contour lines shown in FIG.
i is displayed as shown by a chain line 400 in FIG. Then, as shown in FIG.
0a, 400b, band area 4 showing (hi ± Eh)
20 is displayed, and a positioning result point display 301 is displayed as shown in FIG. Then, similarly to the above-described second embodiment, an elliptical display 302 using the error information Ey and Ex is performed based on the positioning result point display 301 (see FIG. 10E). Thereafter, as shown in FIG. 10F, only the shared area 500 between the elliptical display 302 and the band-shaped area 420 is displayed as error information.

As described above, the liquid crystal panel 2 of the mobile phone 1A
In the case of 0, since three-dimensional area display is performed as error information, more accurate error information of position information can be provided.

In the third embodiment, an example in which the display shown in FIG. 10F is performed on the liquid crystal panel 20 as the position error information has been described. However, the present invention is not limited to this. The display may be performed in various shapes.

Further, in each of the above embodiments, the mobile phone 1
The example in which the position information and the position error information of the mobile phone 1A are displayed on the display panel 20 of B has been described. However, the present invention is not limited to this, and the display panel 20 of the mobile phone 1A displays its own position information and error information. You may make it display.

Further, in each of the above embodiments, the child security system in which the child carries the mobile phone 1A in advance has been described. You may. Furthermore, you may apply to the security system in a vehicle.

Further, in the embodiment of the present invention, the position information and the error information are not limited to being calculated by one of the mobile phones 1A and 1B, but may be calculated by the base station.

In each of the above embodiments, an example has been described in which the position and error information thereof are obtained based on the carrier (transmission signal) from each GPS artificial satellite. However, the present invention is not limited to this, and the transmission signal from each base station is not limited to this. The position and the position information thereof may be obtained based on the position information.

In each of the above embodiments, the first and second
Although an example in which a mobile phone is applied as the terminal has been described, the present invention is not limited to this, and a PHS, PDA, personal computer, or the like may be applied as long as the terminal has a display panel (display unit).

[Brief description of the drawings]

FIG. 1 is a diagram showing a schematic configuration of a child security system according to a first embodiment of the present invention.

FIG. 2 is a front view of the mobile phone shown in FIG.

FIG. 3 is a block diagram showing a schematic electric circuit configuration of the mobile phone shown in FIG. 2;

FIG. 4 is a flowchart showing the operation of the first embodiment.

5A is a diagram showing an area display in the first embodiment, and FIG. 5B is a diagram for explaining dimensions of the area display.

FIG. 6 is a diagram for describing y-direction position information on a GPS satellite according to the second embodiment of the present invention.

FIG. 7 is a diagram for explaining position information of a GPS satellite in the x direction in the second embodiment.

FIG. 8A is a diagram illustrating an elliptical area display according to the second embodiment, and FIG. 8B is a diagram illustrating dimensions of the elliptical area display.

FIG. 9 is a diagram for explaining height information on a GPS satellite according to the third embodiment of the present invention.

FIGS. 10A to 10F are diagrams for explaining area display in the third embodiment.

FIG. 11 is a diagram showing a display example of position information in the related art.

[Explanation of symbols]

20: liquid crystal panel, 301: positioning result point display, 302:
Area display.

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) H04M 11/08 H04B 7/26 109T F term (reference) 2F029 AA07 AB07 AC02 AC03 AC14 5J062 AA01 AA08 AA09 BB05 CC07 DD24 FF01 HH04 HH07 5K027 AA05 AA11 FF01 FF22 5K067 AA33 BB04 DD16 DD17 DD44 DD53 EE02 EE10 EE16 FF23 FF25 HH21 HH23 JJ52 5K101 KK19 LL12 NN18

Claims (7)

[Claims] 1. A terminal (1A) having a display unit (20), which receives a position information signal indicating position information, and displays a position on map information in accordance with the position information signal. A control unit (120) for controlling a display unit, wherein the control unit causes the display unit to display error information of the position on the map information in accordance with the position information signal together with the position. A terminal characterized by controlling. 2. The terminal according to claim 1, wherein the control unit controls the display unit to display error information in both the latitude direction and the longitude direction of the position. 3. The control unit controls the display unit to display error information in a height direction of the position in addition to the error information in the latitude direction and the longitude direction. Item 3. The terminal according to Item 2. 4. The apparatus according to claim 1, wherein the control unit controls the display unit to display the error information in a substantially circular shape centered on the position. The described terminal. 5. A first terminal (1A) having a display unit (20) and an operation unit (30), wherein a position of the second terminal (1B) is changed according to a user operation on the operation unit. A first step (100) of transmitting a request signal requesting information; and a second step (2) of receiving the request signal and transmitting a position information signal indicating the position information by the second terminal (2).
00, 210), the first terminal receives the position information signal, and displays a position and error information of the position on the display unit together with map information according to the received position information signal. A position information display method, comprising: a third step (140, 150). 6. In the second step, the second terminal obtains the position information according to a transmission signal from each of the artificial satellites (# 1 to # 4) and a reception level thereof. 6. The position information display method according to claim 5, wherein: 7. The position information according to claim 5, wherein, in the third step, the first terminal obtains the error information according to the received position information signal. Display method.