CCA busy

[David_Wild]

The network is running poorly with connection loss when moving.

Especially VC units on wheels in one of our hospitals.

There are a large number of 2.4 and 5gig bad network points of CCA busy.

This seemed to come about abruptly a few weeks ago.

[RWelch]

Have you considered reducing the number of APs on the same channel to alleviate congestion?

[PhilipDAth]

What does Wireless Health say?

https://documentation.meraki.com/General_Administration/Cross-Platform_Content/Meraki_Health_Overvie...

Also check out the overview page for recommendations.

Have you tried enabling the AI RRM so it can try and learn the environment to minimise issues?  At a minimum, try enabling the AI channel planning.

https://documentation.meraki.com/MR/Radio_Settings/AI_-_RRM

Have you created a wireless RF profile to reduce the channel width to 20 MHz, increase the minimum bitrate (to improve roaming and performance) and lowered the power levels to free up channel capacity?

https://documentation.meraki.com/MR/Radio_Settings/RF_Profiles

These are some fairly safe settings.

[BaskaranGanesan]

General Recommendation: Meraki typically recommends a 5 GHz transmit power range between 11 dBm and 17 dBm in high-density environments. This range enables the AutoRF (Automatic Radio Frequency) feature to optimize power levels according to environmental factors.

Avoid Max Power: It's a common mistake to set APs to maximum transmit power. This can lead to excessive co-channel interference, where APs on the same channel interfere with each other, reducing overall network performance.

AutoRF: Meraki's AutoRF is designed to adjust transmit power and channel assignments automatically. While you set a range, AutoRF will work within that range to optimize the network. It will not set power lower than 8 dBm on 5 GHz radios in high-density scenarios.

Consider single-band SSIDs (separate for 2.4 GHz and 5 GHz) to encourage devices to connect to the appropriate band. 

Site survey will give you a clear Idea of the wifi environment. 

The Neighbor AP will not see the interference, and if you have enabled AI-RRM, it will automatically adjust the channel and power. 

Cells to have a signal strength of around -80 to -85 dBm to avoid them thinking the channel is busy. For client-to-AP, a signal strength of at least 20 dB (RSSI no lower than -70 dBm) is desired for optimal stability and performance