Dell PowerConnect W-Airwave W-Airwave 7.2 Configuration Guide - Page 117

Table 50 Dell PowerConnect W Configuration > Profiles > SSID > EDCA AP Profile Settings (Continued) Field Default Description Transmission 0 Opportunity Slots in 32 uSec Units ACM No Set the transmission opportunity slots in 32-micro-second intervals. For each AC, the backoff time is the sum of the AIFSN and a random value between 0 and the CW value. The AC with the lowest backoff time is granted the opportunity to transmit (TXOP). Frames with the highest priority AC are more likely to get TXOP as they tend to have the lowest backoff times (a result of having smaller AIFSN and CW parameter values). The value of the CW varies through time as the CW doubles after each collision up to the maximum CW. The CW is reset to the minimum value after successful transmission. In addition, you can configure the TXOP duration for each AC. Define whether or not admission control mandatory (ACM) is to be supported on APs configured with this EDCA profile. If enabled, the client reserves the access category through traffic specification (TSPEC) signaling Video Arbitrary Inter-frame 1 Space Number Minimum Contention 3 Window (Exponent) Maximum Contention 4 Window (Exponent) Transmission 94 Opportunity Slots in 32 uSec Units ACM No WMM is an extension to the Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA) protocol's Distributed Coordination Function (DCF). The collision resolution algorithm responsible for traffic prioritization depends on the following configurable parameters for each AC:  arbitrary inter-frame space number (AIFSN)  minimum and maximum contention window (CW) size For each AC, the backoff time is the sum of the AIFSN and a random value between 0 and the CW value. The AC with the lowest backoff time is granted the opportunity to transmit (TXOP). Frames with the highest priority AC are more likely to get TXOP as they tend to have the lowest backoff times (a result of having smaller AIFSN and CW parameter values). The value of the CW varies through time as the CW doubles after each collision up to the maximum CW. The CW is reset to the minimum value after successful transmission. In addition, you can configure the TXOP duration for each AC. Define whether or not admission control mandatory (ACM) is to be supported on APs configured with this EDCA profile. Voice Arbitrary Inter-frame 1 Space Number Minimum Contention 2 Window (Exponent) Maximum Contention 3 Window (Exponent) WMM is an extension to the Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA) protocol's Distributed Coordination Function (DCF). The collision resolution algorithm responsible for traffic prioritization depends on the following configurable parameters for each AC:  arbitrary inter-frame space number (AIFSN)  minimum and maximum contention window (CW) size Transmission 47 Opportunity Slots in 32 uSec Units For each AC, the backoff time is the sum of the AIFSN and a random value between 0 and the CW value. The AC with the lowest backoff time is granted the opportunity to transmit (TXOP). Frames with the highest priority AC are more likely to get TXOP as they tend to have the lowest backoff times (a result of having smaller AIFSN and CW parameter values). The value of the CW varies through time as the CW doubles after each collision up to the maximum CW. The CW is reset to the minimum value after successful transmission. In addition, you can configure the TXOP duration for each AC. ACM No Define whether or not admission control mandatory (ACM) is to be supported on APs configured with this EDCA profile. 3. Select Add or Save. The added or edited profile appears on the Profiles > SSID > EDCA AP page. Dell PowerConnect W AirWave 7.2 | Configuration Guide Dell PowerConnect W Configuration Reference | 117