User's Manual

Chapter 4 - Operation and Administration
4.2.6.2.4.2
The e frequencies that will be
able frequencies according to
the Su
the
The
4.2.6.2.4.3 Sh
Definitions, the selected Sub-Band
parameters and the current operating frequency will be displayed. The current
e next
lso displayed.
4.2.6.2.5 Best AU Parameters (SU)
An SU that can communicate with more than one AU using the same ESSID may
AU it "finds", not necessarily the best choice in
terms of quality of communication. The same limitation also exists if only one AU
entical to the one used by the SU, as it is
not always necessarily the best choice.
The e
density can accumulate to create substantial
est for load sharing together with the desire to
best AU in its neighborhood.
U
decision according to the information gathered. The AU with the highest quality
by defining a specific AU as
the preferred AU.
Frequency Subset Definition
Frequency Subset Definition parameter defines th
used by the SU when scanning for an AU. The avail
b-Band are displayed, and each of the frequencies in the list is associated
with an index. The frequencies subset can be defined by entering the indexes of
required frequencies, or “A” to select all available frequencies.
default is the complete list of frequencies available in the Sub-Band.
ow Frequency Definitions
Upon selecting the Show Frequency
defined frequency subset as well as the defined subset (to be used after th
reset) are a
become associated with the first
in the neighborhood has an ESSID id
topology of a fixed access network is constantly changing. Changes in bas
station deployment and subscriber
changes in SU performance. The qu
create best throughput conditions for the SU created the need for the Best AU
feature, to enable an SU to connect to the
When the Best AU feature is used, each of the AUs is given a quality mark based
on the level at which it is received by the SU. The SU scans for a configured
number of cycles, gathering information from all the AUs with which it can
communicate. At the end of the scanning period, the SU reaches a Best A
mark is selected as the Best AU, and the SU will immediately try to associate with
it. The quality mark given to each AU depends on the level at which it is received
by the SU.
The Best AU selection mechanism can be overridden
NOTE
Although the SU selects the Best AU based on long-term conditions prior to the decision time, it
may not always be connected to the instantaneous Best AU at any given time. Note also that the
decision is made only once during the scanning interval. The decision may not remain the optimal
one for ever. If there are significant changes in deployment of neighboring AUs and the SUs served
by them, overall performance may be improved if the applicable SUs are reset intentionally so as to
re-initiate the Best AU decision process.
BreezeACCESS 4900 System Manual
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