Configuring Advanced Settings
D-Link Unified Wired and Wireless Access System
Oct. 2015 Page 622
D-Link UWS User Manual
Table 357 describes the QoS settings you can configure.
Table 357: QoS Settings
Field Description
1-802.11a/n
2-802.11b/g/n
From this field, you can select the radio for which you want to configure QoS
settings. Settings for each radio are configured separately.
By default, Radio 1 operates in IEEE 802.11a/n mode, and Radio 2 operates in
IEEE 802.11b/g/n mode. If you change the mode, the labels for the radios
change accordingly. Changes to the settings apply only to the selected radio.
The DWL-3600AP is a single-radio AP. Any settings you configure for Radio 1
(802.11a/n) are not applied to the DWL-3600AP. If the selected Hardware Type
ID for the AP profile is DWL-3600AP, the radio selectors are not available.
Template Select the QoS template to apply to the AP profile. If you select Custom, you can
change the AP and station parameters. If you select Voice or Factory Defaults,
the switch will use the pre-defined settings for the template you select.
AP EDCA Parameters
Queue Queues are defined for different types of data transmitted from AP-to-station:
• Data 0 (Voice)—High priority queue, minimum delay. Time-sensitive data
such as VoIP and streaming media are automatically sent to this queue.
• Data 1(Video)—High priority queue, minimum delay. Time-sensitive video
data is automatically sent to this queue.
• Data 2 (best effort)—Medium priority queue, medium throughput and
delay. Most traditional IP data is sent to this queue.
• Data 3 (Background)—Lowest priority queue, high throughput. Bulk data
that requires maximum throughput and is not time-sensitive is sent to this
queue (FTP data, for example).
AIFS
(Inter-Frame Space)
The Arbitration Inter-Frame Spacing (AIFS) specifies a wait time for data
frames. The wait time is measured in slots. Valid values for AIFS are 1 through
255.
cwMin
(Minimum Contention
Window)
This parameter is input to the algorithm that determines the initial random
backoff wait time (window) for retry of a transmission.
The value specified here in the Minimum Contention Window is the upper limit
(in milliseconds) of a range from which the initial random backoff wait time is
determined.
The first random number generated will be a number between 0 and the
number specified here.
If the first random backoff wait time expires before the data frame is sent, a
retry counter is incremented and the random backoff value (window) is
doubled. Doubling will continue until the size of the random backoff value
reaches the number defined in the Maximum Contention Window.
Valid values for the cwmin are 1, 3, 7, 15, 31, 63, 127, 255, 511, or 1024. The
value for cwmin must be lower than the value for cwmax.
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