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Radio Management

Juniper Mist AI-driven radio resource management (RRM) describes machine learning technology available in both Juniper APs and on the Juniper Mist cloud. RRM is enabled by default and most of the optimizations occur automatically, in the background.

On the cloud, RRM collects data from multiple APs in the WLAN or site, gathered as a part of Service Level Expectations (SLE) such as the Capacity SLE as shown in the following video.

RRM applies continual reinforcement learning to analyze as many as 30 days' worth of performance data. Thus it can identify event-driven trends that occur of the course of a day, week, or month, for example, to deprioritize a channel that has been observed to encounter frequent interference from some sort of neighboring device. In addition to creating a long baseline, this continual observation and learning acts to prevent the kind of system drift and manual intervention that is inherit to static Wi-Fi implementations.

At the level of individual APs, RRM ensures optimal channel optimization by reacting to events like channel interference. It can also automatically, and immediately react to radar hits, and adjust transmit power or channel usage.

Table 1: Comparing Global and Local RRM

Global RRM

Local RRM

Scheduled automatically runs nightly, per site.

Reacts to local events (relative to the AP)

Manual is triggered per radio band

Cloud independent

Uses reinforcement learning

Ad hoc – runs as needed

Leverages a multi-day dataset to make informed decisions

Includes the following events:

  • Auto-channel selection
  • Auto-triggered ACS
  • Interference AP co-channel
  • Interference non-Wi-Fi
  • Neighbor AP down
  • Neighbor AP recovered
  • Radar detected
  • Post radar

Another feature of RRM is called dual-band radio management. Here, RRM leverages the third (or fourth) radio on the AP to identify unnecessary 2.4-GHz radios and automatically convert them to the 5-GHz band (or 6 GHz). This is particularly useful in high-density environments, and occurs without causing the neighboring APs to increase their transmit power.

To manage dual-band, local RRM works with neighboring APs to assess 2.4-GHz radio signal strength and density (how many 2.4-GHz radios are transmitting in a given area). If a particular AP model does not support dual-band, RRM can disable the 2.4-GHz radio rather than convert it to drive traffic to the 5-GHz band. See Radio Management (dual-band).

At both the organization level, and the site level of the configuration, you can override automatic settings by manually configuring which radios to disable, setting the channel width and availability, etc.

As shown in Figure 1, some defaults are tied to the country selection.

Figure 1: The Radio Management Page The Radio Management Page