Method of location display for mobile station

• US 20040203933A1
• Filed: 04/10/2003
• Published: 10/14/2004
• Est. Priority Date: 04/10/2003
• Status: Active Grant

• Current Assignee: BenQ Corporation (Qisda Corporation)
• Original Assignee: BenQ Corporation (Qisda Corporation)
• Inventors: Cheng, Steven D.
• Granted Patent: US 7,283,824 B2
• Time in Patent Office: Days
• US Class Current: 455/457
• CPC Class Codes: G01S 5/0295 Proximity-based methods, e.g. position inferred from reception of particular signals
• CPC Class Codes: H04B 17/27 for locating or positioning the transmitter
• CPC Class Codes: H04B 17/318 Received signal strength
• CPC Class Codes: H04B 7/022 Site diversity; Macro-diversity using two or more spaced independent antennas H04B7/04
• CPC Class Codes: H04W 60/00 Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration
• CPC Class Codes: H04W 64/00 Locating users or terminals or network equipment for network management purposes, e.g. mobility management

Abstract

The present invention relates to a method for determining a nearest base station with respect to a mobile station from M base stations. First, the mobile station compares strengths of M signals received from M base stations with each other to determine a first base station, which has a strongest signal among M signals. Then, P strength differences of the strongest signal with P signals selected from the other (M-1) signals respectively are obtained. Finally, the first base station is determined as being the nearest base station when all strength differences are respectively larger than a predetermined value.

Claims

1. A method for determining a location information of a mobile station, the method comprising:

(1) pre-storing N translation relationships respectively between N identifications and N location informations of N base stations to the mobile station;

(2) receiving M signals from M base stations respectively by the mobile station;

(3) comparing strengths of M signals with each other to determine a first base station, having a strongest signal, and other (M-1) base stations respectively having (M-1) signals,

(4) calculating P strength differences of the strongest signal with P signals selected from the (M-1) signals respectively;

(5) determining the first base station as being the nearest base station when all strength differences are respectively larger than a predetermined value,

(6) receiving the identification of the nearest base station from the nearest base station;

(7) determining a location information corresponding to the identification of the nearest base station by using the translation relationship.

2. The method of claim 1, further comprising displaying the corresponding location information on an output device of the mobile station.

3. The method of claim 1, wherein the step (5) comprises determining both the first base station and a second base station from M base stations as being the nearest base stations when the strength difference of the strongest signal with a signal from the second base station is smaller than the predetermined value.

4. The method of claim 3, wherein the step (5) comprises determining the first base station, the second base station, and a third base station from M base stations as being the nearest base stations when the strength difference of the signal from the second base station with a signal from the third base station is smaller than the predetermined value.

5. The method of claim 3, further comprising displaying the corresponding location information of both the first base station and the second base station on an output device of the mobile station.

6. The method of claim 1, wherein a first group of M base stations belongs to a first network system, and a second group of M base stations belongs to a second network system.

7. The method of claim 6, wherein the first network system includes a home network system related to the mobile station.

8. The method of claim 6, wherein the second network system includes a visiting network system related to the mobile station.

9. The method of claim 1, wherein the strengths of the strongest signal and P signals are stronger than the strengths of other (M-P-1) signals.

10. The method of claim 1, wherein M base stations and N base stations have Q common base stations.

11. The method of claim 1, further comprising determining a location information of the nearest base station as being one location information corresponding to an adjacent base station to the nearest base station, when the nearest base station is not included in the N base stations.

12. The method of claim 11, further comprising displaying the corresponding location information of the adjacent base station on an output device of the mobile station.

13. A method for determining a location of a mobile station from M base stations, the method comprising:

receiving M signals from M base stations respectively by the mobile station;

comparing strengths of M signals with each other to determine a first base station, having a strongest signal, and other (M-1) base stations respectively having (M-1) signals;

calculating P strength differences of the strongest signal with P signals selected from the (M-1) signals respectively;

determining the first base station as being a nearest base station when all strength differences are respectively larger than a predetermined value.

14. The method of claim 13, further comprising determining both the first base station and a second base station from M base stations as being the nearest base stations when the strength difference of the strongest signal with a signal from the second base station is smaller than the predetermined value.

15. The method of claim 13, wherein N translation relationships between identifications and location information of N base stations are pre-stored in the mobile station, and the method further comprises:

receiving the identification of the nearest base station from the nearest base station;

determining a location information corresponding to the identification of the nearest base station by using the translation relationship.

16. The method of claim 15, further comprising displaying the corresponding location information on an output device of the mobile station.

17. The method of claim 15, wherein M base stations and N base stations have Q common base stations.

18. The method of claim 15, further comprising:

determining a location information of the nearest base station as being one location information corresponding to an adjacent base station to the nearest base station, when the nearest base station is not included in the N base stations.

19. The method of claim 18, further comprising displaying the corresponding location information of the adjacent base station on an output device of the mobile station.

20. The method of claim 13, wherein a first group of the M base stations belongs to a first network system, and a second group of the M base stations belongs to a second network system.

21. The method of claim 20, wherein the first network system includes a home network system related to the mobile station.

22. The method of claim 20, wherein the second network system includes a visiting network system related to the mobile station.

23. The method of claim 13, wherein the strengths of the strongest signal and P signals are stronger than the strengths of other (M-P-1) signals.