Vehicle Wi-Fi access point detection and mitigation

Patent metadata

Field	Value
Publication number	US-12166535-B2
Application number	US-202218085997-A
Country	US
Kind code	B2
Filing date	Dec 21, 2022
Priority date	Sep 15, 2020
Publication date	Dec 10, 2024
Grant date	Dec 10, 2024

Abstract

A vehicle includes a wireless transceiver configured to communicate with an infrastructure device in a vehicle-to-everything (V2X) channel having a predetermined channel frequency, the V2X channel being divided into a plurality of subchannels; and a controller, configured to responsive to the wireless transceiver detecting a wireless signal within the frequency of the V2X channel, measure a power spectral density (PSD) gradient of the wireless signal across at least two subchannels of the V2X channel, and compare a magnitude of the PSD gradient against a predetermined gradient threshold, and responsive to verifying the magnitude of the PSD gradient of the wireless signal is greater than the gradient threshold, identify there is an interference to the V2X channel.

First claim

What is claimed is:

1. A vehicle, comprising:
a wireless transceiver configured to communicate with an infrastructure device in a vehicle-to-everything (V2X) channel having a predetermined channel frequency, the V2X channel being divided into a plurality of subchannels; and
a controller, configured to
responsive to the wireless transceiver detecting a wireless signal within the frequency of the V2X channel, measure a power spectral density (PSD) gradient of the wireless signal across at least two subchannels of the V2X channel, and compare a magnitude of the PSD gradient against a predetermined gradient threshold,
responsive to the wireless transceiver detecting a received signal strength indicator (RSSI) across at least two contiguous subchannels exceeding a predetermined RSSI threshold, attempt to decode V2X packets received from the contiguous subchannels; and
responsive to verifying the magnitude of the PSD gradient of the wireless signal is greater than the gradient threshold and failing to decode a number of V2X packets received from the contiguous subchannels corresponding to the RSSI, identify there is an interference to the V2X channel and output an alert to inform a vehicle user of the interference.

2. The vehicle of claim 1 , wherein the channel has a bandwidth of at least 20 MHz and each subchannel has a bandwidth of at least 1 MHz.

3. The vehicle of claim 1 , wherein the interference comes from an out-of-band emission (OOBE) having a frequency not overlapping with the channel frequency.

4. The vehicle of claim 3 , wherein a bandwidth of the OOBE is different from a bandwidth of the channel.

5. The vehicle of claim 1 , wherein the controller is further configured to:
responsive to identifying the interference, disable communications via the V2X channel.

6. A method of a vehicle, comprising:
communicating, via a wireless transceiver, with an infrastructure device in a vehicle-to-everything (V2X) channel having a predetermined channel frequency, the V2X channel being divided into a plurality of subchannels;
responsive to detecting a wireless signal within the frequency of the V2X channel, measuring, via a controller, a power spectral density (PSD) gradient of the wireless signal across at least two subchannels of the V2X channel, and comparing a magnitude of the PSD gradient against a predetermined gradient threshold;
responsive to detecting a received signal strength indicator (RSSI) across at least two contiguous subchannels exceeding a predetermined RSSI threshold, attempting, via the controller, to decode V2X packets received from the contiguous subchannels; and
responsive to verifying the magnitude of the PSD gradient of the wireless signal is greater than the gradient threshold or failing to decode a number of V2X packets received from the contiguous subchannels corresponding to the RSSI, identifying, via the controller, there is an interference to the V2X channel and output an alert to inform a vehicle user of the interference.

7. The method of claim 6 , wherein the channel has a bandwidth of at least 20 MHz and each subchannel has a bandwidth of at least 1 MHz.

8. The method of claim 6 , wherein the interference comes from an out-of-band emission (OOBE) having a frequency not overlapping with the channel frequency.

9. The method of claim 8 , wherein a bandwidth of the OOBE is different from a bandwidth of the channel.

10. The method of claim 6 , further comprising:
responsive to identifying the interference, disabling, via the controller, communications via the V2X channel.

11. A non-transitory computer-readable medium comprising instructions, when executed by a computer of a vehicle, cause the vehicle to:
communicate, via a wireless transceiver, with an infrastructure device in a vehicle-to-everything (V2X) channel having a predetermined channel frequency, the V2X channel being divided into a plurality of subchannels;
responsive to the wireless transceiver detecting a received signal strength indicator (RSSI) across at least two contiguous subchannels exceeding a predetermined RSSI threshold, attempt, via a controller, to decode V2X packets received from the contiguous subchannels; and
responsive to failing to decode a number of V2X packets received from the contiguous subchannels corresponding to the RSSI, identify, via the controller, there is an interference to the V2X channel and output an alert to inform a vehicle user of the interference.

12. The non-transitory computer-readable medium of claim 11 , wherein the channel has a bandwidth of at least 20 MHz and each subchannel has a bandwidth of at least 1 MHz.

13. The non-transitory computer-readable medium of claim 11 , wherein the interference comes from an out-of-band emission (OOBE) having a frequency not overlapping with the channel frequency.

14. The non-transitory computer-readable medium of claim 13 , wherein a bandwidth of the OOBE is different from a bandwidth of the channel.

15. The non-transitory computer-readable medium of claim 11 , further comprising instructions, when executed by the computer of the vehicle, cause the vehicle to:
responsive to identifying the interference, disable, via the controller, communications via the V2X channel.

Assignees

• Ford Global Tech Llc

Inventors

• Vukovic Ivan
• Zagajac Jovan Milivoje
• Ahmad Syed Amaar
• Lieberman Colin Turner

Classifications

• H04W76/11

  Allocation or use of connection identifiers · CPC title

• H04L43/0847

  Transmission error · CPC title

• H04L43/0829

  Packet loss · CPC title

• H04L43/0894

  Packet rate · CPC title

• H04W72/0453

  Resources in frequency domain, e.g. a carrier in FDMA · CPC title