Patent US10542518

Mobile access point detection
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US10542518

1. A method on a User Equipment (UE) comprising: (6) (3)

obtaining measurements from a plurality of Access Points (APs), wherein each AP of the plurality of APs is associated with a corresponding measurement set comprising range rate measurements, wherein the range rate measurements in the corresponding measurement set are based on corresponding Round Trip Time (RTT) measurements between the UE and the AP;

determining, based at least in part, on the corresponding RTT measurements, a corresponding probability that at least one AP of the plurality of APs is mobile; and

determining a location of the UE based upon a subset of the measurements from the plurality of APs, wherein, in response to a determination that the corresponding probability that the at least one AP is mobile exceeds a threshold, the subset excludes measurements from the at least one AP determined to be mobile.

2. The method of claim 1, further comprising: (0) (2)

3. The method of claim 1, wherein determining the corresponding probability that the at least one AP is mobile comprises: (1) (2)

determining, for each range rate measurement associated with the at least one AP, a corresponding expected range rate value, wherein the corresponding expected range rate value is based, in part, on a speed of the UE at a time of the corresponding range rate measurement; and

determining the corresponding probability that the at least one AP is mobile based on a comparison of the range rate measurements associated with the at least one AP with the corresponding expected range rate value for the at least one AP.

4. The method of claim 3, wherein the speed of the UE is determined based on one or more of: (0) (5)

measurements from an Inertial Measurement Unit (IMU); or

measurements from a Satellite Positioning System (SPS); or

input from a Vehicle Navigation System (VNS) communicatively coupled to the UE; or

input from an image sensor; or

some combination thereof.

5. The method of claim 1, wherein, for each AP of the plurality of APs: (1) (2)

the range rate measurements in the corresponding measurement set comprise corresponding first Doppler frequency measurements associated with a first nominal frequency band used by the AP for transmissions; and, wherein,

determining the corresponding probability that the at least one AP is mobile comprises: determining, based, in part, on the corresponding first Doppler frequency measurements associated with the at least one AP, the corresponding probability that the at least one AP is mobile.

6. The method of claim 5, further comprising: (0) (2)

7. The method of claim 1, wherein determining the corresponding probability that the at least one AP is mobile comprises: (1) (1)

9. The method of claim 1, further comprising: (1) (1)

11. The method of claim 1, wherein the measurements comprise: (0) (5)

Round Trip Time (RTT) measurements, or

Time Of Flight measurements, or

Received Signal Strength Indication (RSSI) measurements, or

Doppler frequency measurements, or

some combination thereof.

12. A User Equipment (UE) comprising: (5) (3)

a memory;

a transceiver; and

a processor coupled to the memory and the transceiver, wherein the processor is configured to: obtain, using the transceiver, measurements from a plurality of Access Points (APs), wherein each AP of the plurality of APs is associated with a corresponding measurement set comprising range rate measurements, wherein the range rate measurements in the corresponding measurement set are based on corresponding Round Trip Time (RTT) measurements between the UE and the AP;

determine, based at least in part, on the corresponding RTT measurements, a corresponding probability that at least one AP of the plurality of APs is mobile; and

determine a location of the UE based upon a subset of the measurements from the plurality of APs, wherein in response to a determination that the corresponding probability that the at least one AP is mobile exceeds a threshold, the subset excludes measurements from the at least one AP determined to be mobile.

13. The UE of claim 12, wherein the processor is further configured to: (0) (2)

14. The UE of claim 12, wherein to determine the corresponding probability that the at least one AP is mobile, the processor is configured to: (1) (2)

determine, for each range rate measurement associated with the at least one AP, a corresponding expected range rate value, wherein the corresponding expected range rate value is based, in part, on a speed of the UE at a time of the corresponding range rate measurement; and

determine the corresponding probability that the at least one AP is mobile based on a comparison of the range rate measurements associated with the at least one AP with the corresponding expected range rate value for the at least one AP.

15. The UE of claim 14, wherein the speed of the UE is determined based on one or more of: (0) (5)

measurements from an Inertial Measurement Unit (IMU) sensor on the UE; or

measurements from a Satellite Positioning System (SPS); or

input from a Vehicle Navigation System (VNS) communicatively coupled to the UE; or

input from an image sensor on the UE; or

some combination thereof.

16. The UE of claim 12, wherein, for each AP of the plurality of APs: (1) (2)

to determine the corresponding probability that the at least one AP is mobile, the processor is configured to: determine, based, in part, on the corresponding first Doppler frequency measurements associated with the at least one AP, the corresponding probability that the at least one AP is mobile.

17. The UE of claim 16, wherein the processor is further configured to: (0) (2)

18. The UE of claim 12, wherein to determine the corresponding probability that the at least one AP is mobile, the processor is configured to: (1) (1)

20. The UE of claim 12, wherein the processor is further configured to: (0) (1)

21. A User Equipment (UE) comprising: (0) (3)

means for obtaining measurements from a plurality of Access Points (APs), wherein each AP of the plurality of APs is associated with a corresponding measurement set comprising range rate measurements, wherein the range rate measurements in the corresponding measurement set are based on corresponding Round Trip Time (RTT) measurements between the UE and the AP;

means for determining, based at least in part, on the corresponding RTT measurements, a corresponding probability that at least one AP of the plurality of APs is mobile; and

means for determining a location of the UE based upon a subset of the measurements from the plurality of APs, wherein in response to a determination that the corresponding probability that the at least one AP is mobile exceeds a threshold, the subset excludes measurements from the at least one AP determined to be mobile.

22. A non-transitory computer-readable medium comprising executable instructions to configure a processor on a User Equipment (UE) to: (0) (3)

obtain measurements from a plurality of Access Points (APs), wherein each AP of the plurality of APs is associated with a corresponding measurement set comprising range rate measurements, wherein the range rate measurements in the corresponding measurement set are based on corresponding Round Trip Time (RTT) measurements between the UE and the AP;

determine, based at least in part, on the corresponding RTT measurements, a corresponding probability that at least one AP of the plurality of APs is mobile; and

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Patent US10542518

Mobile access point detection

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