Channel And Power Tuning - 3Com 3CRWX120695A, 3CRWX440095A Configuration Manual

194 C 8: C
HAPTER ONFIGURING
Channel and Power
Tuning
RF A -T
UTO UNING
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 MAP determines a radio's initial
power level by inspecting the RSSI values of probe responses the
radio receives as it actively scans channels. After all channels are
scanned, the MAP selects the highest RSSI value of all probe
responses, and designates its sender as the radio's nearest
neighbor MAP. The MAP determines the power level at which the
nearest neighbor MAP's probe response was sent, and uses this
value and the RSSI to compute the minimum transmit power
required to reach the nearest neighbor MAP. This power level
becomes the radio's default power level.
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.
RF Auto-Tuning can change the channel or power of a radio, to
compensate for RF changes such as interference, or to maintain at least
the minimum data transmit rate for associated clients. A radio continues
to scan on its active data channel and on other channels and reports the
results to its WX switch.
Periodically, the switch examines these results to determine whether the
channel or the power needs to be changed.