Mobile device position determination using compatible dedicated-frequency nodes and non-dedicated-frequency nodes

• US 10,284,999 B2
• Filed: 05/10/2017
• Issued: 05/07/2019
• Est. Priority Date: 05/10/2017
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Kumar, Akash, Jain, Amit, Venkatraman, Sai Pradeep, Yerramalli, Srinivas
• Primary Examiner(s): Mehra, Inder P
• Application Number:
  US15/591,994
• Publication Number:
  US 20180332430A1
• Time in Patent Office: 727 Days
• Field of Search: 4552262, 3405392
• CPC Class Codes: H04B 17/318 Received signal strength
• CPC Class Codes: H04W 4/02 Services making use of location information

Abstract

A mobile device can send and receive signals in a dedicated frequency band and receive signals in a separate frequency band separate from the dedicated frequency band. The mobile device can send one or more frequency band compatibility combinations each including first and second frequency bands, the first frequency band being in the separate frequency band and the second frequency band being in the dedicated frequency. The mobile device can listen, based on a received neighbor list, for a first signal that has a frequency in the first frequency band and for a second signal that has a frequency in the second frequency band. The mobile device can determine, based on the first signal, ranging information indicative of a range from the mobile device to a source of the first signal, e.g., to obtain improved accuracy ranging information.

Claims

1. A mobile wireless communication device comprising:

an antenna configured to send and receive signals in a dedicated frequency band that is dedicated to a communication protocol, and to receive signals in a separate frequency band that is separate from the dedicated frequency band; and

a processor, communicatively coupled to the antenna, configured to;

send, via the antenna to a location server, at least one frequency band compatibility indication wherein each of the at least one frequency band compatibility indication includes a first frequency band and a second frequency band indicative that the mobile wireless communication device can concurrently process signals in the first frequency band while processing signals in the second frequency band, the first frequency band being in the separate frequency band and the second frequency band being in the dedicated frequency band;

receive, via the antenna, a neighbor list indicating a first frequency that is in the first frequency band and indicating a second frequency that is in the second frequency band;

listen, based on the neighbor list, for a first signal that has the first frequency and that conforms to the communication protocol and for a second signal that has the second frequency and that conforms to the communication protocol; and

determine ranging information based on the first signal, the ranging information being indicative of a range from the mobile wireless communication device to a first base station that is a source of the first signal.

2. The mobile wireless communication device of claim 1, wherein the processor is configured to listen for a signal at every frequency in the neighbor list that is in the separate frequency band before listening for a signal at a frequency in the neighbor list that is in the dedicated frequency band.

3. The mobile wireless communication device of claim 1, wherein the processor is configured to scan the separate frequency band in response to a location request being received by the mobile wireless communication device or initiated by the mobile wireless communication device, and wherein the processor is further configured to report, via the antenna to the location server, an identity of a base station from which a signal is received from scanning the separate frequency band.

4. The mobile wireless communication device of claim 3, wherein the processor is configured to scan, of the separate frequency band, only frequencies indicated by the at least one frequency band compatibility indication for a signal from a respective base station.

5. The mobile wireless communication device of claim 1, wherein the ranging information is first ranging information and the processor is further configured to determine second ranging information based on the second signal and to report, via the antenna to the location server in a single outbound signal, the first ranging information and the second ranging information such that the first ranging information is prioritized over the second ranging information.

6. The mobile wireless communication device of claim 1, wherein the processor is further configured to emulate a high data need when no high data need exists.

7. The mobile wireless communication device of claim 6, wherein the processor is configured to emulate the high data need by initiating a background data download.

8. The mobile wireless communication device of claim 1, wherein to determine the ranging information the processor is configured to determine a received signal strength of the first signal.

9. The mobile wireless communication device of claim 1, wherein the processor is configured to respond to a location request being received by the mobile wireless communication device or initiated by the mobile wireless communication device by changing from using a former primary cell base station, that does not operate using a frequency in the second frequency band of the at least one frequency band compatibility indication, to using a present primary cell base station that operates using a frequency in the second frequency band of the at least one frequency band compatibility indication.

10. A mobile device ranging method comprising:

sending, from the mobile device to a location server, at least one frequency band compatibility indication wherein each of the at least one frequency band compatibility indication includes a first frequency band and a second frequency band indicative that the mobile device can concurrently process signals in the first frequency band while processing signals in the second frequency band, the second frequency band being in a dedicated frequency band that is dedicated to a communication protocol, and the first frequency band being in a separate frequency band that is outside the dedicated frequency band;

receiving, at the mobile device, a neighbor list indicating a first frequency that is in the first frequency band and indicating a second frequency that is in the second frequency band;

listening, based on the neighbor list, for a first signal that has the first frequency and that conforms to the communication protocol and for a second signal that has the second frequency and that conforms to the communication protocol; and

determining, by the mobile device, ranging information based on the first signal, the ranging information being indicative of a range from the mobile device to a source base station that is a source of the first signal.

11. The method of claim 10, wherein the listening comprises listening for a signal at every frequency in the neighbor list that is in the separate frequency band before listening for a signal at a frequency in the neighbor list that is in the dedicated frequency band.

12. The method of claim 10, further comprising:

scanning, by the mobile device, the separate frequency band in response to a location request being received by the mobile device or initiated by the mobile device; and

reporting, from the mobile device to the location server, an identity of a base station from which a signal is received from the scanning.

13. The method of claim 12, wherein the scanning the separate frequency band comprises scanning only frequencies of the at least one frequency band compatibility indication.

14. The method of claim 10, wherein the ranging information is first ranging information, the method further comprising determining second ranging information based on the second signal and reporting, from the mobile device to the location server in a single outbound signal, the first ranging information and the second ranging information, wherein the reporting prioritizes the first ranging information over the second ranging information.

15. The method of claim 10, further comprising emulating, by the mobile device, a high data need when no high data need exists.

16. The method of claim 15, wherein the emulating comprises initiating a background data download.

17. The method of claim 10, wherein determining the ranging information comprises measuring a received signal strength of the first signal.

18. A non-transitory, processor-readable storage medium comprising processor-readable instructions configured to instruct one or more processors to:

send, to a location server, at least one frequency band compatibility indication supported by a mobile device, each of the at least one frequency band compatibility indication including a first frequency band and a second frequency band indicative that the mobile device can concurrently process signals in the first frequency band while processing signals in the second frequency band, the second frequency band being in a dedicated frequency band that is dedicated to a communication protocol, and the first frequency band being in a separate frequency band that is outside the dedicated frequency band;

receive a neighbor list indicating a first frequency that is in the first frequency band and indicating a second frequency that is in the second frequency band;

listen, based on the neighbor list, for a first signal that has the first frequency and that conforms to the communication protocol and for a second signal that has the second frequency and that conforms to the communication protocol; and

determine ranging information based on the first signal, the ranging information being indicative of a range from the mobile device to a source base station that is a source of the first signal.

19. The storage medium of claim 18, wherein the instructions configured to instruct the one or more processors to listen are configured to instruct the one or more processors to listen for a signal at every frequency in the neighbor list that is in the separate frequency band before listening for a signal at a frequency in the neighbor list that is in the dedicated frequency band.

20. The storage medium of claim 18, further comprising instructions configured to instruct the one or more processors to scan the separate frequency band in response to a location request being received or initiated by the mobile device.

21. The storage medium of claim 20, wherein the instructions configured to instruct the one or more processors to scan are configured to instruct the one or more processors to scan only frequencies of the at least one frequency band compatibility indication.

22. The storage medium of claim 18, wherein the ranging information is first ranging information, the storage medium further comprising instructions configured to instruct the one or more processors to determine second ranging information based on the second signal and to report, to the location server in a single outbound signal, the first ranging information and the second ranging information with the first ranging information prioritized over the second ranging information.

23. The storage medium of claim 22, further comprising instructions configured to instruct the one or more processors to emulate a high data need when no high data need exists.

24. A mobile wireless communication device comprising:

means for sending, to a location server, at least one frequency band compatibility indication supported by the mobile wireless communication device, each of the at least one frequency band compatibility indication including a first frequency band and a second frequency band indicative that the mobile wireless communication device can concurrently process signals in the first frequency band while processing signals in the second frequency band, the second frequency band being in a dedicated frequency band that is dedicated to a communication protocol, and the first frequency band being in a separate frequency band that is outside the dedicated frequency band;

means for receiving a neighbor list indicating a first frequency that is in the first frequency band and indicating a second frequency that is in the second frequency band;

means for listening, based on the neighbor list, for a first signal that has the first frequency and that conforms to the communication protocol and for a second signal that has the second frequency and that conforms to the communication protocol; and

means for determining ranging information based on the signal from the first base station, the ranging information being indicative of a range from the mobile wireless communication device to the first base station.

25. The mobile wireless communication device of claim 24, wherein the means for listening are for listening for a signal at every frequency in the neighbor list that is in the separate frequency band before listening for a signal at a frequency in the neighbor list that is in the dedicated frequency band.

26. The mobile wireless communication device of claim 24, further comprising means for scanning the separate frequency band in response to a location request being received by the mobile wireless communication device or initiated by the mobile wireless communication device.

27. The mobile wireless communication device of claim 26, wherein the means for scanning are for scanning, of the separate frequency band, only frequencies of the at least one frequency band compatibility indication.

28. The mobile wireless communication device of claim 24, wherein the ranging information is first ranging information and the means for determining are further for determining second ranging information based on the second signal, the mobile wireless communication device further comprising means for reporting, to the location server in a single outbound signal, the first ranging information and the second ranging information with the first ranging information prioritized over the second ranging information.

29. The mobile wireless communication device of claim 28, further comprising means for emulating a high data need when no high data need exists.

30. The mobile wireless communication device of claim 29, wherein the means for emulating the high data need are for initiating a background data download.