User's Manual

Chapter 6: Services Menu
132
Data 2 (best effort): Medium priority
queue, with minimum throughput and
delay. The queue is used to store most
traditional IP data.
Data 3 (Background): Lowest priority
queue, with high throughput. This queue
is used for bulk data that requires
maximum throughput and is not time-
sensitive, such as FTP packets.
AIFS (InterFrame Space) Specifies the Arbitration Inter-Frame
Spacing (AIFS) value, which controls the
wait time for data frames. The wait time is
measured in slots. The range is 1 to 15
slots.
cwMin (Minimum
Contention Window)
Specifies a value that an algorithm uses to
determine the initial random backoff wait
time (window) for resending packets.
This value is the upper limit (in
milliseconds) of a range from which the
access point determines the initial random
backoff wait time.
The first random number the access point
generates will be between 0 and this
number.
If the first random backoff wait time
expires before the data frame is sent, a
retry counter is increased and the random
backoff value (window) is doubled.
Doubling continues until the size of the
random backoff value reaches the
number defined in the maximum
contention window.
Valid values for this parameter are: 1, 3, 7,
15, 31, 63, 127, 255, 511, and 1023. This
parameter must be lower than the cwMax
value.
Table 23. Modify QoS Queue Parameters Window (Continued)
Column Description