METHOD AND APPARATUS FOR DETERMINING LOCATION USING A HYBRID SOLUTION

• US 20080252518A1
• Filed: 03/20/2008
• Published: 10/16/2008
• Est. Priority Date: 03/21/2007
• Status: Active Grant

• Current Assignee: Marvell International Limited (Marvell Technology Group Limited)
• Original Assignee: Marvell International Limited (Marvell Technology Group Limited)
• Inventors: Yeshayahu, Yerachmiel
• Application Number:
  US12/052,504
• Publication Number:
  US 20080252518A1
• Time in Patent Office: Days
• US Class Current: 342/357.02
• 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

Abstract

A method and device for location determination includes receiving at least one signal from a first transmitter and receiving at least one signal from a second signal transmitter. The first transmitter transmits a first type of signal and the second transmitter transmits a second type of signal different from the first type of signal. Location determination further includes assessing a signal quality of the signals received from at least one of the first signal transmitter and second signal transmitter and determining a location of a device using the received first and second type of signals at least from both the first signal transmitter and from the second signal transmitter.

Claims

1. A device for location determination comprising:

a first receiver configured to receive at least one signal from a first transmitter;

a second receiver configured to receive at least one signal from a second signal transmitter, wherein the first receiver is configured to receive a first type of signal and the second receiver is configured to receive a second type of signal different from the first type of signal;

a signal quality processor configured to assess a quality of signals received by the first receiver and the second receiver; and

a location calculator that determines a location of the device using the first type of signal and the second type of signal in response to a signal quality assessment.

2. The device for location determination according to claim 1 wherein the signal quality processor determines signal quality based on signal availability.

3. The device for location determination according to claim 1 wherein the first type of signal comprises one of GPS, television, and cellular signals.

4. The device for location determination according to claim 1 further comprising a location server configured to determine signal quality and location determination responsive to at least the first type of signal and the second type of signal.

5. The device for location determination according to claim 1 further comprising a block, responsive to a signal quality determined by the signal quality processor, that determines when a hybrid combination of the first type of signal and the second type of signal is used and when only the first type of signal is used for location determination.

6. The device for location determination according to claim 1 wherein the signal quality processor determines a signal quality based on at least one of signal strength, received signal power, and signal location accuracy.

7. A method for location determination comprising:

receiving at least one signal from a first transmitter;

receiving at least one signal from a second transmitter, wherein the first transmitter transmits a first type of signal and the second transmitter transmits a second type of signal different from the first type of signal;

assessing a signal quality of received signals received from at least one of the first signal transmitter and second signal transmitter; and

determining a location of a device using the received first and second type of signals at least from both the first transmitter and from the second transmitter.

8. The method according to claim 7 wherein assessing signal quality is based on signal availability.

9. The method according to claim 7 wherein the first type of signal comprises at least one of GPS, television, and cellular signals.

10. The method according to claim 7 further comprising determining when a hybrid combination of the first type of signal and the second type of signal is used and when only the first type of signal is used for location determination.

11. The method according to claim 7 wherein the signal quality is based on at least one of signal strength, received signal power, and signal location accuracy.

12. The method according to claim 7 further comprising preventing wireless scanning operations when a change in location has not exceeded a threshold.

13. A device for location determination comprising:

a first receiver configured to receive at least one signal from a first transmitter;

a second receiver configured to receive at least one signal from a second signal transmitter, wherein the first receiver is configured to receive a first type of signal and the second receiver is configured to receive a second type of signal different from the first type of signal;

a signal processor configured to assess accuracy of signals received by the first receiver and the second receiver; and

a location calculator that determines a location of the device using the first type of signal and the second type of signal in response to signal assessment.

14. The device for location determination according to claim 13 wherein the signal processor determines signal accuracy based on signal availability.

15. The device for location determination according to claim 13 wherein the first type of signal comprises one of GPS, television, and cellular signals.

16. The device for location determination according to claim 13 further comprising a location server configured to determine signal accuracy and location determination responsive to at least the first type of signal and the second type of signal.

17. A reduced power consumption wireless local area network device comprising:

a location determination mechanism configured to determine a change in location responsive to at least one of GPS, Cellular, or television signals, wherein the location determination mechanism uses more than one of GPS, Cellular, or television signals when one of GPS, Cellular, or television signals alone are not sufficient; and

an access point selector configured to initiate an access point scan when the location determination mechanism determines a change in location.

18. The device according to claim 17 further comprising a signal quality processor that determines when a hybrid combination of GPS, Cellular, or television signals is used and when only one of GPS, Cellular, or television signals is sufficient for location determination.

19. A process for reduced power consumption in a wireless local area network comprising:

determining a change in location responsive to at least one of GPS, Cellular, or television signals, wherein the location change determination uses more than one of GPS, Cellular, or television signals when one of GPS, Cellular, or television signals alone are not sufficient; and

initiating an access point scan when the location determination mechanism determines a change in location.

20. The process according to claim 19 further comprising determining when a hybrid combination of GPS, Cellular, or television signals is used and when only one of GPS, Cellular, or television signals is sufficient for location determination.