Radio frequency interference awareness assistance data
Systems, methods, apparatuses, and computer-readable media for providing radio frequency interference (RFI) awareness assistance data to global navigation satellite system (GNSS) receivers are described. In some embodiments, a first method includes receiving at a location server RFI situational information. The first method further includes maintaining at least one time and location dependent database of an RFI situation. The first method further includes sending at least one assistance data message to at least one receiver including the RFI situational information. In another embodiment, a second method includes receiving RFI awareness assistance data from a location server. The second method further includes adapting a position location measurement according to the received RFI awareness assistance data. The second method further includes calculating a location of the receiver based at least in part on the adapted position location measurement.
1. A method of determining a location of a mobile device, comprising:
receiving, from a location server, radio frequency interference (RFI) data associated with one or more Global Navigation Satellite Systems (GNSSs), wherein the RFI data is maintained within at least one location dependent database associated with the location server;
determining, by the mobile device, one or more weights associated with the one or more GNSSs based at least in part on the received RFI data;
identifying, by the mobile device, one or more satellites from the one or more GNSSs to use for determining the location of the mobile device based at least in part on the one or more weights associated with the one or more GNSSs; and
determining, by the mobile device, the location of the mobile device based at least in part on at least one of the identified one or more satellites.
2. The method of claim 1 , further comprising determining, by the mobile device, one or more weights associated with one or more non-GNSS positioning techniques.
3. The method of claim 2 , wherein the one or more non-GNSS positioning techniques comprise at least one of Observed Time Difference of Arrival (OTDOA), Advanced Forward Link Trilateration (AFLT), or Enhanced Cell-ID (ECID) positioning.
4. The method of claim 2 , further comprising identifying, by the mobile device, a non-GNSS positioning technique of the one or more non-GNSS positioning techniques to use for determining the location of the mobile device based at least in part on the one or more weights associated with the one or more non-GNSS positioning techniques.
5. The method of claim 2 , wherein the one or more GNSSs comprise a first GNSS and a second GNSS, the method further comprising determining, by the mobile device, a combination of the first GNSS and the second GNSS based at least in part on the one or more weights associated with the one or more GNSSs.
6. The method of claim 1 , wherein the one or more GNSSs comprise at least one of global positioning satellite (GPS), Globalnaya Navigatsionnaya Sputnikovaya Sistema (GLONASS), Galileo positioning system, or BeiDou Navigation Satellite System (BDS).
7. The method of claim 1 , wherein the RFI data is indicative of an RFI situation associated with the one or more GNSSs.
8. The method of claim 7 , wherein the RFI data comprises at least one of time and frequency characteristics of a RFI of the RFI situation, a power of the RFI, a power-to-noise ratio of the RFI, or a pseudorandom noise (PRN) code number of the RFI.
9. An apparatus, comprising:
a memory; and
a processor coupled to the memory, the processor configured to:
receive, from a location server, radio frequency interference (RFI) data associated with one or more Global Navigation Satellite Systems (GNSSs), wherein the RFI data is maintained within at least one location dependent database associated with the location server;
determine one or more weights associated with the one or more GNSSs based at least in part on the received RFI data;
identify one or more satellites from the one or more GNSSs to use for determining the location of a mobile device based at least in part on the one or more weights associated with the one or more GNSSs; and
determine the location of the mobile device based at least in part on at least one of the identified one or more satellites.
10. The apparatus of claim 9 , wherein the processor is further configured to determine one or more weights associated with one or more non-GNSS positioning techniques.
11. The apparatus of claim 10 , wherein the one or more non-GNSS positioning techniques comprise at least one of Observed Time Difference of Arrival (OTDOA), Advanced Forward Link Trilateration (AFLT), or Enhanced Cell-ID (ECID) positioning.
12. The apparatus of claim 10 , wherein the processor is further configured to identify a non-GNSS positioning technique of the one or more non-GNSS positioning techniques to use for determining the location of the mobile device based at least in part on the one or more weights associated with the one or more non-GNSS positioning techniques.
13. The apparatus of claim 10 , wherein the one or more GNSSs comprise a first GNSS and a second GNSS, the processor further configured to determine a combination of the first GNSS and the second GNSS based at least in part on the one or more weights associated with the one or more GNSSs.
14. The apparatus of claim 9 , wherein the one or more GNSSs comprise at least one of global positioning satellite (GPS), Globalnaya Navigatsionnaya Sputnikovaya Sistema (GLONASS), Galileo positioning system, or BeiDou Navigation Satellite System (BDS).
15. The apparatus of claim 9 , wherein the RFI data is indicative of an RFI situation associated with the one or more GNSSs.
16. The apparatus of claim 15 , wherein the RFI data comprises at least one of time and frequency characteristics of a RFI of the RFI situation, a power of the RFI, a power-to-noise ratio of the RFI, or a pseudorandom noise (PRN) code number of the RFI.
17. An apparatus, comprising:
means for receiving, from a location server, radio frequency interference (RFI) data associated with one or more Global Navigation Satellite Systems (GNSSs), wherein the RFI data is maintained within at least one location dependent database associated with the location server;
means for determining one or more weights associated with the one or more GNSSs based at least in part on the received RFI data;
means for identifying one or more satellites from the one or more GNSSs to use for determining the location of a mobile device based at least in part on the one or more weights associated with the one or more GNSSs; and
means for determining the location of the mobile device based at least in part on at least one of the identified one or more satellites.
18. The apparatus of claim 17 , further comprising means for determining one or more weights associated with one or more non-GNSS positioning techniques.
19. The apparatus of claim 18 , wherein the one or more non-GNSS positioning techniques comprise at least one of Observed Time Difference of Arrival (OTDOA), Advanced Forward Link Trilateration (AFLT), or Enhanced Cell-ID (ECID) positioning.
20. The apparatus of claim 18 , further comprising means for identifying a non-GNSS positioning technique of the one or more non-GNSS positioning techniques to use for determining the location of the mobile device based at least in part on the one or more weights associated with the one or more non-GNSS positioning techniques.
21. The apparatus of claim 18 , wherein the one or more GNSSs comprise a first GNSS and a second GNSS, the apparatus further comprising means for determining a combination of the first GNSS and the second GNSS based at least in part on the one or more weights associated with the one or more GNSSs.
22. The apparatus of claim 17 , wherein the one or more GNSSs comprise at least one of global positioning satellite (GPS), Globalnaya Navigatsionnaya Sputnikovaya Sistema (GLONASS), Galileo positioning system, or BeiDou Navigation Satellite System (BDS).
23. The apparatus of claim 17 , wherein the RFI data is indicative of an RFI situation associated with the one or more GNSSs.
24. A computer program product residing on a non-transitory processor-readable medium and comprising processor-readable instructions configured to cause a processor to:
receive, from a location server, radio frequency interference (RFI) data associated with one or more Global Navigation Satellite Systems (GNSSs), wherein the RFI data is maintained within at least one location dependent database associated with the location server;
determine one or more weights associated with the one or more GNSSs based at least in part on the received RFI data;
identify one or more satellites from the one or more GNSSs to use for determining the location of a mobile device based at least in part on the one or more weights associated with the one or more GNSSs; and
determine the location of the mobile device based at least in part on at least one of the identified one or more satellites.
25. The computer program product of claim 24 , wherein the instructions are further configured to determine one or more weights associated with one or more non-GNSS positioning techniques.
26. The computer program product of claim 25 , wherein the one or more non-GNSS positioning techniques comprise at least one of Observed Time Difference of Arrival (OTDOA), Advanced Forward Link Trilateration (AFLT), or Enhanced Cell-ID (ECID) positioning.
27. The computer program product of claim 25 , wherein the instructions are further configured to identify a non-GNSS positioning technique of the one or more non-GNSS positioning techniques to use for determining the location of the mobile device based at least in part on the one or more weights associated with the one or more non-GNSS positioning techniques.
28. The computer program product of claim 25 , wherein the one or more GNSSs comprise a first GNSS and a second GNSS, the instructions are further configured to determine a combination of the first GNSS and the second GNSS based at least in part on the one or more weights associated with the one or more GNSSs.
29. The computer program product of claim 24 , wherein the one or more GNSSs comprise at least one of global positioning satellite (GPS), Globalnaya Navigatsionnaya Sputnikovaya Sistema (GLONASS), Galileo positioning system, or BeiDou Navigation Satellite System (BDS).
30. The computer program product of claim 24 , wherein the RFI data is indicative of an RFI situation associated with the one or more GNSSs.