APPARATUS AND SYSTEM FOR ESTIMATING LOCATION OF TERMINAL

• US 20090312037A1
• Filed: 06/25/2008
• Published: 12/17/2009
• Est. Priority Date: 06/13/2008
• Status: Abandoned Application

• Current Assignee: Radiant Technologies, Inc. (Salesforce.com, Inc.), Seoul National University Industry Foundation (Seoul National University)
• Original Assignee: Radiant Technologies, Inc. (Salesforce.com, Inc.), Seoul National University Industry Foundation (Seoul National University)
• Inventors: Lee, Jeongkeun, Jo, Daehyung, Han, Jinyoung, Kwon, Taekyoung, Kim, Tae Il, Ha, Tae Joon
• Application Number:
  US12/145,645
• Publication Number:
  US 20090312037A1
• Time in Patent Office: Days
• US Class Current: 455/456.200
• CPC Class Codes: G01S 5/0252 Radio frequency fingerprinting
• CPC Class Codes: G01S 5/08 Position of single direction-finder fixed by determining direction of a plurality of spaced sources of known location

Abstract

A method and an apparatus for estimating a location of a terminal are provided. The method includes: receiving at least one base station signal from each of at least one base station; computing received signal information with respect to the received signal; and estimating the location of the terminal based on signal transmission direction information associated with the base station and the computed received signal information. The present invention can accurately estimate the location of the terminal based on directional information of base station signals.

Claims

1. A method for estimating a location of a terminal, comprising;

receiving at least one base station signal from each of at least one base station;

computing received signal information with respect to the received signal; and

estimating the location of the terminal based on signal transmission direction information associated with the base station and the computed received signal information.

2. The method of claim 1, wherein the received signal information comprises received signal strength of the received base station signal or a number of base station signals.

3. The method of claim 1, wherein the signal transmission direction information comprises an antenna direction of the base stations or radiation pattern information of the antenna.

4. The method of claim 2, further comprising:

selecting a received signal with the highest strength based on the computed received signal strength,

wherein the estimating of the location of the terminal further considers the selected received signal with the highest strength to estimate the location of the terminal.

5. The method of claim 1, further comprising:

receiving location information of each of the at least one base station,

wherein the estimating of the location of the terminal further considers the location of the base station to estimated the location of the terminal.

6. The method of claim 1, wherein the estimating of the location of the terminal computes a probability that the terminal is located at each point within coverage of the base station.

7. A computer-readable storage medium storing a program for implementing the method of claim 1.

8. An apparatus for estimating a location of a terminal, comprising:

a base station signal information receiving unit receiving base station signal information of at least one base station signal being transmitted from at least one base station to a terminal;

a base station information receiving unit receiving signal transmission direction information of the base station; and

a location estimation unit estimating the location of the terminal based on the base station signal information and signal transmission direction information of the base station.

9. The apparatus of claim 8, wherein the base station signal information comprises received signal strength of the received base station signal or a number of base station signals.

10. The apparatus of claim 8, wherein the signal direction information comprises an antenna direction of the base stations or radiation pattern information of the antenna.

11. The apparatus of claim 8, wherein the location estimation unit further considers the number of received signals to estimate the location of the terminal.

12. The apparatus of claim 8, further comprising:

a received signal with the highest strength selection unit selecting a received signal with the highest strength, from among the base station signal, based on the received signal strength,

wherein the base station information receiving unit receives signal transmission direction information associated with the received signal with the highest strength, and the location estimation unit further considers received signal strength of the received signal with the highest strength and signal transmission direction information associated with the received signal with the highest strength.

13. The apparatus of claim 8, wherein the base station information comprises geometrical information at each point within coverage of the base station and a probability that the each point receives the base station signal.

14. The apparatus of claim 8, wherein the base station information comprises location information of the base station, and the location estimation unit further considers the location information of the base station to estimate the location of the terminal.

15. The apparatus of claim 8, wherein the location estimation unit computes a probability that the terminal is located at each point within coverage of the base station.

16. A system for estimating a location of a terminal, comprising:

at least one base station device transmitting a base station signal to the terminal;

a base station information storage device storing signal transmission direction information of the base station; and

a location estimation device further considering the base station signal and the signal transmission direction information of the base station to estimate the location of the terminal.

17. The system of claim 16, wherein the signal transmission direction information comprises an antenna direction of the base stations or radiation pattern information of the antenna.

18. The system of claim 16, wherein the terminal selects a received signal with the highest strength based on received signal strength of the base station signal, and the location estimation device further considers the signal transmission direction information of the base station which corresponds to the selected received signal with the highest strength to estimate the location of the terminal.

19. The system of claim 16, wherein the location estimation device estimates the location of the terminal based on a number of base station signals.

20. The system of claim 16, wherein the signal transmission direction information comprises geometrical information at each point within coverage of the base station and a probability that the each point receives the base station signal.

21. The system of claim 20, wherein the geometrical information at each point is measured utilizing a global positioning system (GPS) signal.