Campus lan and Wireless lan solution Design Guide

Signal
—Your own APs belonging to the same RF network. 
● 
Interference
—Other 802.11 devices operating nearby that can be heard by your network.
● 
Noise
—Any energy in the RF spectrum that cannot be demodulated as 802.11 protocol. 
● 
Load
—Instantaneous user load on the network. 
● 
Coverage
—The RSSI and signal-to-noise ratio estimated by the system for clients attached to your 
network. 
Using this information, RRM can periodically reconfigure the 802.11 RF network for best efficiency. To do this, 
RRM performs these functions: 
● 
RRM data collection
—Collecting the metrics 
● 
Transmit Power Control (TPC) algorithm
—Adjusting for optimal power levels 
● 
Dynamic channel assignment (DCA)
—Ensuring that channel assignments do not overlap 
● 
Cisco Flexible Radio Assignment (FRA)
—Determines the role of the flexible radio for APs with that flexible 
radio capability 
● 
Coverage Hole Detection and Mitigation (CHDM) algorithm
—Ensuring that you have adequate coverage 
and detecting clients that may be in a coverage hole 
RRM automatically detects and configures new Cisco WLCs and Cisco Catalyst APs as they are added to the 
network. It then automatically adjusts associated and nearby APs to optimize coverage and capacity. 
For more detailed information about what RRM does and how it takes its measurements, see the 
Radio 
Resource Management White Paper
 on cisco.com. 
Transmit power control 
The Cisco WLC dynamically controls AP transmit power based on real-time WLAN conditions. Cisco Catalyst 
9800 Series WLCs support TPCv1 only. With TPCv1, typically power can be kept low to gain extra capacity and 
reduce interference. TPCv1 is well suited for use in most deployments.