Mitigate adjacent channel interference and non-Wi-Fi interference

• US 9,350,483 B2
• Filed: 01/15/2014
• Issued: 05/24/2016
• Est. Priority Date: 01/15/2014
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Zhou, Yan, Cherian, George, Abraham, Santosh Paul
• Primary Examiner(s): Elliott, IV, Benjamin H
• Application Number:
  US14/155,880
• Publication Number:
  US 20150201419A1
• Time in Patent Office: 860 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: H04L 1/00 Arrangements for detecting or preventing errors in the information received correcting synchronisation H04L7/00
• CPC Class Codes: H04W 72/02 Selection of wireless resources by user or terminal
• CPC Class Codes: H04W 72/541 using the level of interference
• CPC Class Codes: H04W 84/12 WLAN [Wireless Local Area Networks]

Abstract

Devices, systems and methods are described for mitigating interference in a wireless communications network. In particular, the network may be a Wi-Fi network. Multiple approaches may be implemented to mitigate ACI. Further, multiple approaches may be implemented to mitigate non-Wi-Fi interference as well. Each of the approaches may consist of two parts, namely, interference detection and interference mitigation (or reduction). One approach may involve: detecting adjacent channel interference (ACI) in an operating channel of the device; determining a location of the detected ACI in an operating band of the device; and mitigating the detected ACI by communicating via a channel different from the operating channel, the different channel being determined to be further away from the location of the detected ACI.

Claims

1. A method performed by a device of a Wi-Fi network for mitigating interference, comprising:

detecting adjacent channel interference (ACI) in an operating channel of the device;

determining a location of the detected ACI in an operating band of the device;

determining a first side of the operating channel on the operating band, wherein the detected ACI is located on the first side; and

mitigating the detected ACI by communicating via a different channel located on a second side of the operating channel on the operating band, wherein the second side is opposite the first side, the different channel being determined to be further away from the location of the detected ACI.

2. The method of claim 1, wherein the determining the location of the detected ACI comprises:

identifying at least one ACI channel as a channel contributing to the detected ACI.

3. The method of claim 2, wherein identifying the at least one ACI channel comprises:

tuning to non-operating channels to identify one or more channels contributing to the detected ACI.

4. The method of claim 1, wherein the determining the location of the detected ACI comprises:

communicating with at least one other device over a common control channel to obtain information regarding at least one ACI channel contributing to the detected ACI.

5. The method of claim 1, wherein the mitigating the detected ACI comprises:

determining the different channel; and

tuning to the different channel.

6. The method of claim 1, further comprising:

mitigating the detected ACI by tuning to the different channel based at least in part on a message received from an access point serving the device.

7. The method of claim 1, further comprising:

detecting non-Wi-Fi interference; and

mitigating the non-Wi-Fi interference based at least in part on an interference type classification of the non-Wi-Fi interference.

8. The method of claim 1, further comprising:

detecting non-Wi-Fi interference; and

mitigating the non-Wi-Fi interference by indicating for a user to take an action to mitigate the non-Wi-Fi interference.

9. The method of claim 8, wherein the indicating for the user to take the action comprises:

indicating for the user to turn off at least one of a non-Wi-Fi device and a non-WiFi application.

10. The method of claim 8, wherein the indicating for the user to take the action comprises:

indicating for the user to move away from a current location.

11. The method of claim 10, wherein the indicating for the user to move away from the current location comprises:

indicating for the user to move to a location identified as having less non-Wi-Fi interference.

12. A device of a Wi-Fi network, comprising:

means for detecting adjacent channel interference (ACI) in an operating channel of the device;

means for determining a location of the detected ACI in an operating band of the device;

means for determining a first side of the operating channel on the operating band, wherein the detected ACI is located on the first side; and

means for mitigating the detected ACI by communicating via a different channel located on a second side of the operating channel on the operating band, wherein the second side is opposite the first side, the different channel being determined to be further away from the location of the detected ACI.

13. The device of claim 12, wherein:

the means for determining the location of the detected ACI is configured to identify at least one ACI channel as a channel contributing to the detected ACI; and

the means for mitigating the detected ACI is configured to mitigate the ACI by communicating via a channel different from the operating channel, the different channel being determined to be further away from the at least one ACI channel.

14. The device of claim 13, wherein the means for determining the location of the detected ACI is configured to identify at least one ACI channel as a channel contributing to the detected ACI by tuning to non-operating channels to identify one or more channels causing the ACI.

15. The device of claim 12, further comprising:

means for determining the different channel; and

means for tuning to the different channel.

16. A device of a Wi-Fi network, the device comprising:

a processor;

memory in electronic communication with the processor; and

instructions stored in the memory, the instructions being executable by the processor to;

detect adjacent channel interference (ACI) in an operating channel of the device;

determine a location of the detected ACI in an operating band of the device;

determine a first side of the operating channel on the operating band, wherein the detected ACI is located on the first side; and

mitigate the detected ACI by communicating via a different channel located on a second side of the operating channel on the operating band, wherein the second side is opposite the first side, the different channel being determined to be further away from the location of the detected ACI.