D-Link DWL-8600AP User Manual page 623

D-Link UWS User Manual
Field
cwMax
(Maximum Contention
Window)
Max. Burst
General Parameters
WMM Mode
Station EDCA Parameters
Queue
AIFS
(Inter-Frame Space)
D-Link
Oct. 2015
Table 357: QoS Settings (Cont.)
Description
The value specified here in the Maximum Contention Window is the upper
limit (in milliseconds) for the doubling of the random backoff value. This
doubling continues until either the data frame is sent or the Maximum
Contention Window size is reached.
Once the Maximum Contention Window size is reached, retries will continue
until a maximum number of retries allowed is reached.
Valid values for the cwmax are 1, 3, 7, 15, 31, 63, 127, 255, 511, or 1024. The
value for cwmax must be higher than the value for cwmin.
AP EDCA Parameter Only (The Max. Burst Length applies only to traffic flowing
from the access point to the client station.)
This value specifies (in milliseconds) the Maximum Burst Length allowed for
packet bursts on the wireless network. A packet burst is a collection of multiple
frames transmitted without header information. The decreased overhead
results in higher throughput and better performance.
Valid values for maximum burst length are 0.0 through 999.
Wi-Fi MultiMedia (WMM) is enabled by default. With WMM enabled, QoS
prioritization and coordination of wireless medium access is on. With WMM
enabled, QoS settings on the D-Link Unified Switch control downstream traffic
flowing from the access point to client station (AP EDCA parameters) and the
upstream traffic flowing from the station to the access point (station EDCA
parameters).
Disabling WMM deactivates QoS control of station EDCA parameters on
upstream traffic flowing from the station to the access point
With WMM disabled, you can still set some parameters on the downstream
traffic flowing from the access point to the client station (AP EDCA parameters).
To disable WMM extensions, click Disabled.
To enable WMM extensions, click Enabled.
Queues are defined for different types of data transmitted from station-to-AP:
• Data 0 (Voice)—Highest priority queue, minimum delay. Time-sensitive
data such as VoIP and streaming media are automatically sent to this queue.
• Data 1(Video)—Highest 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).
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.
Configuring Advanced Settings
Unified Wired and Wireless Access System
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