Alvarion BreezeNET B System Manual page 198

Chapter 4 - Operation
slots as determined by the Contention Window back-off algorithm after
reaching a decision that the medium has become free. DIFS equal SIFS plus
AIFS, where AIFS is a configurable number of time slots.
Under regular conditions, AIFS is configured to two time slots. To support
prioritization in the wireless link, we can configure a higher AIFS for low priority
traffic (AIFS of two time slots will always be used for high priority traffic as well as
BU's transmissions of broadcasts/multicasts and beacons). This will give
advantage to units that need to transmit high priority traffic (depending also on
the configured values for the Contention Window parameters).
Other parameters related to transmission to the wireless media that can be
configured separately for high/low priority packets are the Number of HW Retries
and Burst Duration.
Typically, a lower value of Number of HW Retries should be configured for traffic
such as VoIP, which on the one hand is sensitive to delays and on the other hand
is less sensitive to missing packets than data traffic.
The Burst Duration, which defines the maximum duration of a burst, should be
set to a lower value for delay sensitive traffic.
When the Wireless Link Prioritization feature is enabled, the following parameters
are not applicable:
Arbitration Inter-Frame Spacing (AIFS)

Number of HW Retries

Burst Mode Option

Burst Mode Time Interval

Low Priority Traffic Minimum Percent

The Wireless Link Prioritization Parameters menu includes the following:
4.2.6.6.3.6.1 Wireless Link Prioritization Option
The Wireless Link Prioritization Option enables or disables the Wireless Link
Prioritization feature.
The default option is Disable.
BreezeNET B 174
Menus and Parameters
System Manual