Interference reduction or prevention in collocated gelocation and wireless connectivity systems

Patent metadata

Field	Value
Publication number	US-12507176-B2
Application number	US-202218061927-A
Country	US
Kind code	B2
Filing date	Dec 5, 2022
Priority date	Dec 5, 2022
Publication date	Dec 23, 2025
Grant date	Dec 23, 2025

Abstract

Techniques for reducing wireless interference are provided. A wireless local area network (WLAN) is providing, by an access point using a first radio. It is determined to initiate a geolocation process for the access point using a second radio. A first amount of interference at the second radio caused by the first radio is determined, and either a hot start geolocation acquisition process or a cold start geolocation acquisition process is selectively used for the AP based on comparing the first amount of interference to one or more criteria.

First claim

We claim:

1 . A method, comprising:
providing, by an access point (AP), a wireless local area network (WLAN) using a first radio; determining to initiate a geolocation process for the AP using a second radio; determining a first amount of interference at the second radio caused by the first radio; selecting a geolocation acquisition process comprising either a hot start geolocation acquisition process or a cold start geolocation acquisition process for the AP based on comparing the first amount of interference to one or more criteria; and performing geolocation acquisition using the selected geolocation acquisition process.

2 . The method of claim 1 , further comprising:
determining a second amount of interference to the second radio at a first time, wherein the first amount of interference was determined at a second time prior to the first time; and in response to determining that the second amount of interference satisfies the one or more criteria, initiating a hot start geolocation acquisition process for the AP.

3 . The method of claim 1 , further comprising:
monitoring, during a geolocation tracking process for the AP, ongoing interference amounts to the second radio; and in response to determining that the ongoing interference amounts satisfy the one or more criteria, initiating a hot reset geolocation acquisition process for the AP.

4 . The method of claim 3 , wherein determining the ongoing interference amounts comprises:
monitoring a carrier-to-noise power density on the second radio; monitoring utilization on the first radio; and determining that the carrier-to-noise power density is correlated with the utilization.

5 . The method of claim 1 , wherein determining that the first amount of interference satisfies the one or more criteria comprises determining that the first amount of interference exceeds a threshold amount of interference, as compared to a historical amount of interference for the second radio.

6 . The method of claim 1 , further comprising performing an adaptive power management operation for the first radio, comprising:
reducing a transmission power of the first radio by a defined amount; increasing a beamwidth of the first radio to compensate for the reduced transmission power; and determining a second amount of interference to the second radio and caused by the first radio at the reduced transmission power.

7 . The method of claim 6 , further comprising, in response to determining that the second amount of interference satisfies the one or more criteria, further reducing the transmission power of the first radio by the defined amount.

8 . The method of claim 6 , further comprising:
determining that the first amount of interference has satisfied the one or more criteria for at least a threshold duration of time; and determining to perform the adaptive power management operation in response to determining that the first amount of interference has satisfied the one or more criteria for at least the threshold duration of time.

9 . The method of claim 1 , further comprising:
determining a utilization of the first radio; sorting a list of candidate APs based on historical interference information; and in response to determining that the utilization satisfies the one or more criteria, steering one or more clients of the AP to one or more candidate APs, based on the sorted list of candidate APs.

10 . A non-transitory computer-readable medium containing computer program code that, when executed by operation of one or more computer processors, performs an operation comprising:
providing, by an access point (AP), a wireless local area network (WLAN) using a first radio; determining to initiate a geolocation process for the AP using a second radio; determining a first amount of interference at the second radio caused by the first radio; and selecting a geolocation acquisition process comprising either a hot start geolocation acquisition process or a cold start geolocation acquisition process for the AP based on comparing the first amount of interference to one or more criteria; and performing geolocation acquisition using the selected geolocation acquisition process.

11 . The non-transitory computer-readable medium of claim 10 , the operation further comprising:
determining a second amount of interference to the second radio at a first time, wherein the first amount of interference was determined at a second time prior to the first time; and in response to determining that the second amount of interference satisfies the one or more criteria, initiating a hot start geolocation acquisition process for the AP.

12 . The non-transitory computer-readable medium of claim 10 , the operation further comprising:
monitoring, during a geolocation tracking process for the AP, ongoing interference amounts to the second radio; and in response to determining that the ongoing interference amounts satisfy the one or more criteria, initiating a hot reset geolocation acquisition process for the AP.

13 . The non-transitory computer-readable medium of claim 10 , the operation further comprising performing an adaptive power management operation for the first radio, comprising:
reducing a transmission power of the first radio by a defined amount; increasing a beamwidth of the first radio to compensate for the reduced transmission power; and determining a second amount of interference to the second radio and caused by the first radio at the reduced transmission power.

14 . The non-transitory computer-readable medium of claim 13 , the operation further comprising, in response to determining that the second amount of interference satisfies the one or more criteria, further reducing the transmission power of the first radio by the defined amount.

15 . The non-transitory computer-readable medium of claim 10 , the operation further comprising:
determining a utilization of the first radio; sorting a list of candidate APs based on historical interference information; and in response to determining that the utilization satisfies the one or more criteria, steering one or more clients of the AP to one or more candidate APs, based on the sorted list of candidate APs.

16 . A system, comprising:
one or more computer processors; and a memory containing a program which when executed by the one or more computer processors performs an operation, the operation comprising:
providing, by an access point (AP), a wireless local area network (WLAN) using a first radio;
determining to initiate a geolocation process for the AP using a second radio;
determining a first amount of interference at the second radio caused by the first radio; and
selecting a geolocation acquisition process comprising either a hot start geolocation acquisition process or a cold start geolocation acquisition process for the AP based on comparing the first amount of interference to one or more criteria; and
performing geolocation acquisition using the selected geolocation acquisition process.

17 . The system of claim 16 , the operation further comprising:
determining a second amount of interference to the second radio at a first time, wherein the first amount of interference was determined at a second time prior to the first time; and in response to determining that the second amount of interference satisfies the one or more criteria, initiating a hot start geolocation acquisition process for the AP.

18 . The system of claim 16 , the operation further comprising:
monitoring, during a geolocation tracking pro

Assignees

• Cisco Tech Inc

Inventors

• Alizadeh Ardalan
• Kalavakuru Sivadeep R
• Amini Peiman
• Desai Vishal S

Classifications

• H04W24/08

  Testing, {supervising or monitoring} using real traffic · CPC title

• H04W52/367

  Power values between minimum and maximum limits, e.g. dynamic range · CPC title

• H04W84/12

  WLAN [Wireless Local Area Networks] · CPC title

• H04W52/243 Primary

  taking into account interferences · CPC title

• H04W52/285 Primary

  taking into account the mobility of the user · CPC title