Are access points aware of other access points and their power levels? Can AP's adjust power levels dynamically? I am working on power savings and was wondering if it is possible to save more energy by having aps adjust their power levels? So if I have a group of 4 AP's in a smaller area they dont all need to run at the highest level of power, so they know this and adjust accordingly.
With Cisco equipment, RRM(Radio Resource Management) is used for that purpose. One thing that used to confuse me was what part of RRM was responsible for turning up power as opposed to turning down the transmit power. With RRM, the transmit power control algorithm is responsible for adjusting the AP power down to limit cell overlap and co-channel interference.
RRM uses the coverage hole algorithm to adjust the AP powers levels up. The engineer sets a SNR threshold to determine how the coverage hole algorithm will react when a clients SNR value drops below the threshold.
What do you mean by dangers? It's there to help dynamically control the APs power and channel assignments to help avoid large cell overlap and co-channel interference. (Having APs on the same channel right next to one another)
From the web interface, click "Wireless". Then on the left, expand 802.11/b/g/n. You will see a sub-menu with all of the RRM threshold values and settings. Cisco has some recommended values. Take a few minutes to read over the documentation. That will help out a lot. You may need to tweak the threshold values to suit your environment as we have had to do.
You can tweak it if you need to do so. I tweaked our wireless network to not run RRM at the default time interval. We thought the default setting was allowing RRM to run a little too often. If really depends on your environment.
Here is something that might interest you. I don't have a need for this, but maybe you can use it.
Yes sir! I have looked at this. I actually have all AP's set on an energywise schedule that shuts them off nightly which I assume saves more power than turning off radios.