D-Link DWC-2000-AP32-LIC User Manual - Page 95

Section 4 - Advanced WLAN Configuration 3. Complete the fields below and click Save. Field AP Profile Radio Mode Template Queue AIFS (Inter-Frame Space) cwMin (Minimum Contention Window) Description The name of AP Profile The radio mode. 802.11a/n or 802.b/g/n 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 wireless controller will use the pre‐defined settings for the template you select. AP EDCA Parameters 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). 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. 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. D-Link DWC-2000 User Manual 95