Positioning system and method using mobile internet signal

• US 20060148491A1
• Filed: 12/29/2005
• Published: 07/06/2006
• Est. Priority Date: 01/04/2005
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Hong, Hyun-Su, Hyun, Moon-Pil, Jeon, Ji-Youn, Pyo, Jong-Sun, Kim, Jin-Won
• Granted Patent: US 7,561,885 B2
• Time in Patent Office: Days
• US Class Current: 455/456.100
• CPC Class Codes: G01S 11/02 using radio waves G01S19/00 takes precedence
• CPC Class Codes: G01S 5/14 Determining absolute distances from a plurality of spaced points of known location
• CPC Class Codes: H04W 64/00 Locating users or terminals or network equipment for network management purposes, e.g. mobility management

Abstract

A positioning system using a mobile Internet signal is disclosed. The positioning system includes access points for transmitting downlink signals for mobile Internet communications, an access terminal for generating positioning information using the downlink signals received from the access points and access point information on the access points, and a position determination entity (PDE) for calculating range values between the access terminal and the access points using the positioning information from the access terminal and determining a position of the access terminal using the range values. Since the positioning system determines the position using the mobile Internet signal, an accurate terminal position can be determined even in such environments as downtown, shaded and indoor areas.

Claims

1. A positioning system using a mobile Internet signal, comprising:

access points for transmitting downlink signals for mobile Internet communications;

an access terminal for receiving the downlink signals and generating positioning information using the downlink signals and access point information on the access points; and

a position determination entity (PDE) for calculating range values between the access terminal and the access points using the positioning information from the access terminal and determining a position of the access terminal using the calculated range values.

2. The positioning system as claimed in claim 1, wherein the positioning information includes numbers of symbols and samples of the downlink signals.

3. The positioning system as claimed in claim 1, wherein the access terminal calculates numbers of symbols and samples of the downlink signals, and generates the positioning information that includes the numbers of symbols and samples.

4. The positioning system as claimed in claim 1, wherein the access terminal calculates numbers of symbols and samples incoming between downlink signal transmission and reception times.

5. The positioning system as claimed in claim 1, wherein the range values are calculated by the following equation,

R=(nsymbol*102.4 μ

s+nsample_—

*100 ns)*3*10⁸ m/s

where R denotes a range value between the access terminal and an access point, nsymbol denotes a number of symbols, 102.4 μ

s denotes a time for one symbol, nsample denotes a number of samples and 100 ns denotes a time for one sample.

6. The positioning system as claimed in claim 1, wherein the PDE calculates equations for obtaining the range values by applying a Time Difference Of Arrival (TDOA), and determines the position of the access terminal by using the equations and the range values.

7. A positioning system using a mobile Internet signal, comprising:

access points for transmitting downlink signals for mobile Internet communications and pilot signals for mobile communications;

an access terminal for receiving the downlink signals and the pilot signals, and generating positioning information using the downlink signals with access point information and the pilot signals, respectively; and

a position determination entity (PDE) for calculating range values between the access terminal and the access points using the positioning information from the access terminal and determining a position of the access terminal using the calculated range values.

8. The positioning system as claimed in claim 7, wherein the positioning information includes numbers of symbols and samples of the downlink signals, and a number of pseudo random noise (PN) phases of the pilot signals.

9. The positioning system as claimed in claim 7, wherein the access terminal calculates numbers of symbols and samples of the received downlink signals, calculates a number of pseudo random noise (PN) phases of the pilot signals, and generates the positioning information that includes the numbers of symbols and samples and the number of PN phases.

10. The positioning system as claimed in claim 7, wherein the access terminal calculates a number of pseudo random noise (PN) phases incoming between times when the access point transmits the pilot signals and the access terminal receives the pilot signals.

11. The positioning system as claimed in claim 7, wherein the PDE calculates equations for obtaining the range values by applying a TDOA (Time Difference Of Arrival), and determines the position of the access terminal by using the equations and the range values.

12. A positioning method using a mobile Internet signal, comprising:

receiving downlink signals from access points using an access terminal for mobile Internet communications;

generating positioning information using access point information on the access points and the downlink signals received from the access points; and

calculating range values between the access terminal and the access points using the positioning information and calculating a position of the access terminal using the range values.

13. The positioning method as claimed in claim 12, wherein the positioning information includes numbers of symbols and samples of the downlink signals and a number of pseudo random noise (PN) phases of the pilot signals.

14. The positioning method as claimed in claim 12, wherein the range values are calculated by the following equation,

R=(nsymbol*102.4 μ

s+nsample_—

*100 ns)*3*10 m/s,

where R denotes a range value between the access terminal and an access point, nsymbol denotes a number of symbols, 102.4 μ

s denotes a time for one symbol, nsample denotes a number of samples and 100 ns denotes a time for one sample.

15. The positioning method as claimed in claim 12, wherein the step of calculating the position of the access terminal comprises:

calculating respective calculation equations for obtaining the ranges between the access terminal and the access points;

determining a reference access point and adjacent access points from the access points;

calculating a difference equation between a calculation equation for obtaining a range between the access terminal and the reference access point and calculation equations for obtaining ranges between the access terminal and the adjacent access points;

calculating position information of the access terminal and quadratic equations relating to the ranges between the access terminal and the respective access points using the difference equation; and

calculating the position of the access terminal using the position information of the access terminal, the quadratic equations relating to the ranges between the access terminal and the respective access points and the range values between the access terminal and the access points.

16. A positioning method using a mobile Internet signal, comprising:

transmitting downlink signals for mobile Internet communications and pilot signals for mobile communications from access points;

receiving the downlink signals from an access terminal;

generating mobile Internet positioning information and mobile communication positioning information using the access points; and

calculating range values between the access terminal and the access points using the mobile Internet positioning information and the mobile communication positioning information, and calculating a position of the access terminal using the range values.

17. The positioning method as claimed in claim 16, wherein the positioning information includes numbers of symbols and samples of the downlink signals.

18. The positioning method as claimed in claim 16, wherein the positioning information includes a number of pseudo random noise (PN) phases of the pilot signals.

19. The positioning method as claimed in claim 16, wherein the step of calculating the position of the access terminal comprises:

calculating equations for obtaining ranges between the access terminal and the access points by applying a TDOA (Time Difference Of Arrival); and

determining the position of the access terminal by using the equations and the range values.