User's Manual

Chapter 4 - Operation and Administration
BreezeNET B System Manual
4-38
Frequency Subset Definition
The previous parameters define a sub band of frequencies between the
Sub Band Lower Frequency and the Sub Band Upper Frequency
using the Scanning Step resolution. The Frequency Subset Definition
option enables defining a specific subset of frequencies within this sub
band to be used during scanning. When selected, a list of all valid
frequencies in the band is displayed, and an index is given to each
frequency. The current defined subset is also displayed. The defined
subset is modified by entering a list of desired indexes, separated by
commas (no spaces). Enter A to select all frequencies in the subset.
The default is A, which is the list that includes all indexes of
frequencies defined by the previous parameters.
Show Frequency Definition Parameters
The Show Frequency Definition Parameters option displays all the
Frequency Definition parameters, including the defined subset and the
Current Frequency Subset, which is the subset currently in use. It
also displays the Current Operating Frequency, which is the discreet
frequency currently used by the unit.
Best BU Parameters (RB)
An RB that can communicate with more than one BU using the same
ESSID may become associated with the first BU it "finds", not
necessarily the best choice in terms of quality of communication or
other factors. The same limitation also exists if only one BU in the
neighborhood has an ESSID identical to the one used by the RB, since
it is not always necessarily the best choice.
The desire to create best throughput conditions for the RB created the
need for the Best BU feature, to enable an RB to connect to the best BU
in its neighborhood.
When the Best BU feature is used, each of the BUs is given a quality
mark based on the level at which it is received by the RB. The RB scans
for a configured number of cycles, gathering information from all the
BUs it can communicate with. At the end of the scanning period, the RB
reaches a Best BU decision according to the information gathered. The
BU with the highest quality mark is selected as the Best BU, and the
RB will immediately try to associate with it. The quality mark given to
each BU depends on the level at which it is received by the RB.
The Best BU selection mechanism can be overridden by defining a
specific BU as the preferred BU.