Managing Network Interfaces
37 Wavion
To set the Operational Channel
In the Status and Configuration area, from the dropdown list in the Operational Channel field,
select the channel on which the system runs. Default is Channel 6: 2437 MHz.
Setting the Transmission Power
Be sure the Transmission Power is set to the maximum; the radio button in this field should be
set on the setting closest to the word Max.
Selecting the Interference Handling Mode
The default Interference Handing Mode is
Interferences Mode
. This mode adaptively
changes the system sensitivity according to the interference conditions in the environment. In
some cases, using the other modes may result in better performance than
Interferences
Mode
due to limitations with tracking the exact interference. For the identification of the
different cases the “Channel Parameters” section in the “Wireless Activity” Page must be
consulted.
As a rule of thumb, when the sum of “Other WiFi activity” and “Interferences” activity
percentages is more than half the percentage of “Idle Time”, changing the interference
handling mode to the next mode may help to improve the overall performance of the system.
◊
From “Interferences Mode” change to “Moderate Interferences Mode”.
◊
From “Moderate Interferences Mode change” to “High Interferences Mode”.
After changes please allow 10 minutes for the interference mitigation algorithm to reach steady
state. Check the performance of the system before you change to the next mode.
Frequency Planning Consideration
When high-density deployments are needed, one of the main issues is the frequency planning
and re-use. IEEE 802.11 define 20MHz channels that overlap. In 802.11b/g there are only 3
channels that do not overlap. These channels are channel 1 (2412MHz), channel 6 (2437MHz)
and channel 11 (2462MHz).
The Wavion base station is capable of working in 15MHz channel separation, while having
minimum overlapping effect on neighboring (15MHz) channels. At 2.4GHz band (802.11b/g), that
means that there can be 4 non-overlapped channels: Channel 1 (2412MHz), channel 4
(2427MHz), channel 8 (2447MHz), and channel 11 (2.462MHz). Despite this, any standard
802.11 CPE will be able to work with the WBS without throughput degradation.
The WBS-2400 also reduces the Tx power automatically when in Overlapping mode to allow
better signal quality in sites where several base-stations are co-located. However, a slightly larger
BST separation of 2 meters between units must be kept.
