Wi-Fi management in the presence of high priority receivers

Patent metadata

Field	Value
Publication number	US-11470656-B2
Application number	US-202016832560-A
Country	US
Kind code	B2
Filing date	Mar 27, 2020
Priority date	Mar 27, 2020
Publication date	Oct 11, 2022
Grant date	Oct 11, 2022

Abstract

The disclosed embodiments provide for management of a Wi-Fi network in the presence of a high priority receiver. When a high priory receiver is identified, a portion of the Wi-Fi network that could potentially interfere with the high priority receiver is identified and steps are taken to reduce the probability of such interference. For example, some wireless transmitters may be switched to alternate channels to reduce the probability of interference. By sharing information relating to high priority receivers across a plurality of wireless transmitters, the disclosed embodiments provide for more efficient operation in the presence of high priority receivers when compared to methods that independently detect a high priority receiver at each wireless transmitter.

First claim

The invention claimed is:

1. A method, comprising:
receiving, from a first wireless device of a plurality of wireless devices of a wireless network, a notification of a detection of a high priority receiver (HPR), the notification indicating a channel on which the HPR was detected;
estimating a geographic location of the HPR;
determining, based on received signal strength measurements of signals generated by the plurality of wireless devices of a wireless network, an attenuation between each of the plurality of wireless devices and the first wireless device;
identifying, based on the attenuation between each of the plurality of wireless devices and the first wireless device, one or more wireless devices of the plurality of wireless devices within a predetermined proximity of the geographic location of the HPR; and
providing a notification including instructions to avoid operation on the channel to the one or more wireless devices within the predetermined proximity of the geographic location of the HPR.

2. The method of claim 1 , further comprising generating a network graph based on the signal strength measurements, wherein identifying one or more wireless devices of the plurality of wireless devices within a predetermined proximity of the geographic location of the HPR is based on the network graph.

3. The method of claim 1 , wherein identifying one or more wireless devices of the plurality of wireless devices within a predetermined proximity of the geographic location of the HPR further includes:
comparing the attenuation between each of the plurality of wireless devices and the first wireless device to the predetermined threshold.

4. The method of claim 1 , wherein estimating a geographic location of the HPR is based on a plurality of signal strength measurements of signals generated by the HPR, the signal strength measurements by wireless devices of the plurality of wireless devices.

5. The method of claim 1 , wherein identifying one or more wireless devices of the plurality of wireless devices within a predetermined proximity of the geographic location of the HPR comprises estimating, based on the signal strength measurements, a signal strength of the HPR at each wireless device of the plurality of wireless devices, and identifying a subset of the plurality of wireless devices having an estimated signal strength of the HPR that meets a criterion.

6. The method of claim 5 , further comprising:
detecting, by the first wireless device, an absence of available channels; and
in response to the detecting, attempting, by the first wireless device, communication on a channel on a blacklist that was not detected by the first wireless device before attempting communication on a second channel detected by the first wireless device.

7. The method of claim 1 , the operations further comprising:
determining a predetermined elapsed time has elapsed since operation of the HPR was detected, and removing the first channel from a blacklist in response to the determining.

8. A system, comprising:
hardware processing circuitry;
one or more hardware memories storing instructions that when executed configure the hardware processing circuitry to perform operations comprising:
receiving, from a first wireless device of a plurality of wireless devices of a wireless network, a notification of a detection of a high priority receiver (HPR), the notification indicating a channel on which the HPR was detected;
estimating a geographic location of the HPR;
determining, based on received signal strength measurements of signals generated by the plurality of wireless devices of a wireless network, an attenuation between each of the plurality of wireless devices and the first wireless device;
identifying, based on the attenuation between each of the plurality of wireless devices and the first wireless device, one or more wireless devices of the plurality of wireless devices within a predetermined proximity of the geographic location of the HPR; and
providing a notification including instructions to avoid operation on the channel to the one or more wireless devices within the predetermined proximity of the geographic location of the HPR.

9. The system of claim 8 , the operations further comprising generating a network graph based on the signal strength measurements, wherein identifying one or more wireless devices of the plurality of wireless devices within a predetermined proximity of the geographic location of the HPR is based on the network graph.

10. The system of claim 8 , wherein identifying one or more wireless devices of the plurality of wireless devices within a predetermined proximity of the geographic location of the HPR further includes:
comparing the attenuation between each of the plurality of wireless devices and the first wireless device to a predetermined threshold; and
identifying the set of the plurality of wireless devices based on whether the respective attenuation satisfies the predetermined threshold.

11. The system of claim 8 , wherein estimating a geographic location of the HPR is based on a plurality of signal strength measurements of signals generated by the HPR, the signal strength measurements by wireless devices of the plurality of wireless devices.

12. The system of claim 8 , wherein identifying one or more wireless devices of the plurality of wireless devices within a predetermined proximity of the geographic location of the HPR further includes estimating, based on the signal strength measurements, a signal strength of the HPR at each wireless device of the plurality of wireless devices, identifying a subset of the plurality of wireless devices having an estimated signal strength of the HPR that meets a criterion, and adding the identified subset of wireless devices to the set of wireless devices.

13. The system of claim 8 , wherein the plurality of wireless devices includes a plurality of access points, the operations further comprising:
detecting an initialization of an access point of the plurality of access points; and
transmitting blacklist information including a notification indicating the channel on which the HPR was detected to the access point in response to the detecting.

Assignees

• Juniper Networks Inc

Inventors

• Wang Wenfeng

Classifications

• H04W72/541

  using the level of interference · CPC title

• H04W74/0875 Primary

  with assigned priorities based access · CPC title

• H04W16/14 Primary

  Spectrum sharing arrangements {between different networks} · CPC title

• H04W88/06

  adapted for operation in multiple networks {or having at least two operational modes}, e.g. multi-mode terminals · CPC title

• H04W24/02 Primary

  Arrangements for optimising operational condition · CPC title