System for determining position of mobile communication terminal and method thereof

• US 20030193432A1
• Filed: 05/15/2003
• Published: 10/16/2003
• Est. Priority Date: 12/26/2000
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Kim, Hyong-Won
• Granted Patent: US 6,847,325 B2
• Time in Patent Office: Days
• US Class Current: 342/357.29
• CPC Class Codes: G01S 19/05 providing aiding data
• CPC Class Codes: G01S 19/09 providing processing capability normally carried out by the receiver
• CPC Class Codes: G01S 19/41 Differential correction, e.g. DGPS [differential GPS]
• CPC Class Codes: G01S 19/46 the supplementary measurement being of a radio-wave signal type
• CPC Class Codes: G01S 19/48 by combining or switching between position solutions derived from the satellite radio beacon positioning system and position solutions derived from a further system
• CPC Class Codes: G01S 19/50 whereby the position solution is constrained to lie upon a particular curve or surface, e.g. for locomotives on railway tracks
• CPC Class Codes: G01S 5/0036 of measured values, i.e. measurement on mobile and position calculation on base station

Abstract

A position determination system of a hybrid method, which is capable of complementing the problems of a position determination method, in which a global positioning system (GPS) is used, and a position determination method, in which a mobile communication signal is used, by combining the above two methods with each other, is provided. Also, it is possible to improve the reliability and the correctness in determining the position of a mobile communication terminal using a dispersing type hybrid position calculation method and a centralized hybrid position calculation method.

Claims

1. A system for determining the position of a mobile communication terminal, comprising:

a global positioning system (GPS) engine built-in a mobile terminal, the GPS engine for measuring a pseudo range between a GPS satellite and the mobile terminal;

a signal measuring apparatus for measuring the reception angle and the delay time of a mobile communication signal; and

a position calculation server for calculating the position of the mobile terminal using the pseudo range corrected by the error correction data of a GPS satellite signal and the reception angle and the delay time of the mobile communication signal.

2. The system of claim 1, further comprising a GPS receiver for receiving the GPS satellite signal and periodically outputting the error correction data and the GPS satellite data of the GPS satellite signal.

3. The system of claim 1, further comprising:

a mobile communication signal server for storing the reception angle and the delay time measured by the signal measuring apparatus; and

a geographical information server, in which various geographical data items matching a position calculation result are stored.

4. The system of claim 1, wherein the position calculation server comprises:

a pseudo range corrector for correcting a pseudo range using the error correction data;

a first position calculator for calculating the position of the mobile terminal by the corrected pseudo range;

a second position calculator for calculating the position of the mobile terminal using the reception angle and the delay time of the mobile communication signal;

a position calculation filter for calculating the optimal position of the mobile terminal on the basis of the position calculations of the first and second position calculators; and

a map match portion for matching the geographical data of a geographical information server to the calculation result of the position calculation filter and generating various position information items.

5. The system of claim 1, wherein the position calculation server comprises:

the pseudo range corrector for correcting the pseudo range using the error correction data;

the position calculation filter for calculating the position of the mobile terminal using the corrected pseudo range and the reception angle and the delay time of the mobile communication signal; and

the map match portion for matching the geographical data of the geographical information server to the calculation result of the position calculation filter and generating the various position information items.

6. A system for determining the position of a mobile terminal, comprising:

a mobile terminal, in which a GPS engine is loaded;

a signal measuring apparatus for measuring the reception angle and the delay time of a mobile communication signal;

a GPS receiver for receiving the transmission signal of a GPS satellite and measuring the error correction data and the GPS satellite data of a GPS satellite signal;

a pseudo range corrector for correcting the pseudo range measured by the GPS engine using the error correction data;

a first position calculator for calculating the position of the mobile terminal by the corrected pseudo range;

a second position calculator for calculating the position of the mobile terminal using the reception angle and the delay time of the mobile communication signal; and

a position calculation filter for calculating the optimal position of the mobile terminal on the basis of the calculation results of the first and second position calculators.

7. The system of claim 6, further comprising:

the geographical information server for storing various geographical data items; and

the map match portion for matching the geographical data of the geographical information server to the position calculation result of the position calculation filter and generating various position information items.

8. A system for determining the position of a mobile communication terminal, comprising:

a mobile terminal, in which a GPS engine is loaded;

a signal measuring apparatus for measuring the reception angle and the delay time of a mobile communication signal;

a GPS receiver for receiving the transmission signal of a GPS satellite and measuring the error correction data and the GPS satellite data of a GPS satellite signal;

a pseudo range corrector for correcting the pseudo range using the error correction data; and

a position calculation filter for calculating the position of the mobile terminal using the corrected pseudo range and the reception angle and the delay time of the mobile communication signal

9. The system of claim 8, further comprising:

the geographical information server for storing various geographical data items; and

the map match portion for matching the geographical data of the geographical information server to the position calculation result of the position calculation filter and generating various position information items.

10. A method for determining the position of a mobile communication terminal, comprising the steps of:

(a) receiving a pseudo range between a GPS satellite and a mobile terminal;

(b) receiving the reception angle and the delay time of a mobile communication signal;

(c) correcting the pseudo range using the error correction data of a GPS satellite signal; and

(d) calculating the position of the mobile terminal using the corrected pseudo range and the reception angle and the delay time of the mobile communication signal.

11. The method of claim 10, further comprising the steps of matching the position calculation result to the geographical data and generating position information for providing various geographical information services.

12. The method of claim 10, further comprising the step of periodically receiving the error correction data and the GPS satellite information of the GPS satellite signal from the GPS receiver.

13. The method of claim 10, wherein the reception angle and the delay time are stored in the mobile communication signal server.

14. Method of claim 10, wherein the step (d) comprises the steps of:

(d1) calculating the position of the mobile terminal by the corrected pseudo range;

(d2) calculating the position of the mobile terminal using the reception angle and the delay time of the mobile communication signal; and

(d3) calculating the optimal position of the mobile terminal on the basis of the calculation results obtained by the steps (d1) and (d2).

15. The method of claim 10, wherein, in the step (d), the position of the mobile communication terminal is calculated using the reception angle and the delay time of the mobile communication signal.

16. A method for determining the position of a mobile communication terminal, comprising the steps of:

(a) receiving a pseudo range between a GPS satellite and a mobile terminal;

(b) receiving the reception angle and the delay time of a mobile communication signal;

(c) correcting the pseudo range using the error correction data of a GPS satellite signal;

(d) calculating the position of the mobile terminal using the corrected pseudo range;

(e) calculating the position of the mobile terminal using the reception angle and the delay time of the mobile communication signal;

(f) calculating the optimal position of the mobile terminal on the basis of the calculation results obtained by the steps (d) and (e); and

(g) matching the final position calculation result to the geographical data and generating position information for providing geographical information services.