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DWS-1008 User’s Manual
D-Link Systems, Inc.
Configuring RF Auto-Tuning
Configuring RF Auto-Tuning
RF AutoTuning Overview
The RF AutoTuning feature dynamically assigns channel and power settings to AP radios,
and adjusts those settings when needed. RF AutoTuning can perform the following tasks:
• Assign initial channel and power settings when an AP radio is started.
• Periodically assess the RF environment and change the channel or power
setting if needed.
• Change the transmit data rate or power to maintain at least the minimum data rate
with all associated clients.
By default, RF AutoTuning is enabled for channel configuration and disabled for power
configuration.
Initial Channel and Power Assignment
The following process is used to assign the channel and power to an AP radio when it is first
enabled:
• If RF AutoTuning is
disabled
for both channel and power assignment, the radio
uses the channel and power settings in the radio profile that manages the radio.
After this, the channel and power do not change unless you change the settings in
the radio profile, or enable RF AutoTuning.
• If RF AutoTuning is
enabled
for channel and power assignment, the radio performs
an RF scan and reports the results to the switch that is managing the AP the
radio is on. The scan results include third-party access points. Based on the scan
results, MSS sets the channel and power on the radio. MSS always selects channel
and power settings that are valid for the country of operation.
• Initial channel assignment - MSS determines a radio’s initial channel based on
RSSI values, interference levels on each valid channel, and other parameters. MSS
periodically reevaluates the channel and changes it if needed.
• Initial power assignment - The DWL-8220AP sets a radio’s initial power level to the
maximum value allowed for the country code (regulatory domain). In a deployment
with few APs, the radio remains at maximum power. Otherwise, the radio reduces
power until the power is just enough to reach the AP’s third-closest neighbor (for
802.11b/g) or eighth-closest neighbor (for 802.11a).
The radio can temporarily increase its power level based on client needs but returns to its
default power level when clients no longer need the higher power level.
MSS periodically reevaluates the default power level and changes it if needed.
Summary of Contents for DWS-1008
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