Mimosa Backhaul Help Content
Mimosa Backhaul Performance
Copyright © 2014 Mimosa Page 33
Auto Everything
Product Applicability: B5/B5c, B5-Lite
Auto Everything (AE) is a feature that makes automatic adjustments to link settings (channels, channel width,
transmit power, and single or dual channel modes) in response to changes in the RF spectrum with the goal
of achieving balance between link reliability and capacity. The algorithm calculates prospective quality of
available channels, and then ranks each based on the expected achievable link rate at the physical layer (PHY).
Auto Everything comprises the following four sub-processes:
INITIAL SETUP - Upon powering the radios, the Access Point (AP) is automatically set to a 1x20 MHz channel and
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then attempts to associate with the Station. Upon association, a quick channel analysis is initiated to find the
clearest channels within the available spectrum. The radios are then set to use the best channel(s).
HEALTH CHECK - Monitors channel quality in the background frequently (HEALTH CHECK) and changes channels
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if the link consistently has a high Packet Error Rate (PER). If the HEALTH CHECK fails, the radio will change to
the next best available channels from the list generated during full analysis.
CONSTANT OPTIMIZATION - Changes to better channels (higher PHY rate), when available, even if the current
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channels have sufficiently low PER. Optimization often also involves increasing channel width, and/or changing
from single channel to dual channel mode.
POWER SELECTION - Calculates and sets optimal transmit power while complying with regulatory restrictions.
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Frequency of Channel Changes
Interference: If the link experiences high PER consistently for approximately 2 minutes, the Access Point will
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select the best alternative channel(s). If link health is still poor after the first change, Auto Everything will
continue to select the next best channel from its spectrum options. It will continue to do this 6 times, for a total
of 12 minutes. If after 12 minutes, it still cannot find a channel with sufficiently low PER, it will revert to INITIAL
SETUP mode and attempt to associated on a clean 1x20 channel.
Clearer Channel Identification: Auto Everything strives to keep the radio on the clearest channel or channels.
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Auto Everything performs background scans and monitors those channels which have considerably better
conditions than the existing channels in preparation for their need. When channel change is induced due
to finding a clearer channel (and not due to interference), the channel change occurs after ten background
analysis cycles because the change is a non-critical improvement to link health.
Channel Analysis
Auto Everything calculates expected throughput for each channel using spectrum data from both sides of the link.
The AP periodically pulls analysis data from the STATION and selects channels that are clear for both radios. If Auto
Everything is unable to find a mutually clean channel for both sides of a link, it will choose a 1x FD mode. Channel
analysis runs as a background process which constantly updates the list of good channels based on changes in
spectrum.
Adjustment to B5c EIRP
Auto Everything will recalculate the maximum allowed transmit power based upon the antenna gain (B5c only). Any
change to antenna gain (Wireless > Channel & Power > Channel & Power Settings > Antenna Gain) will cause AE to
recalculate the new max allowed transmit power during channel analysis.
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