136 | Aruba Configuration Reference AirWave Wireless Management Suite | Configuration Guide
3. Click Add or Save. The added or edited profile appears on the Profiles > SSID > EDCA Station page.
ACM No Define whether or not admission control mandatory (ACM) is to be supported
on APs configured with this EDCA profile.
Video
Arbitrary Inter-
frame Space
Number
2 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:
z arbitrary inter-frame space number (AIFSN)
z minimum and maximum contention window (CW) size
Minimum
Contention
Window (Exponent)
3
Maximum
Contention
Window (Exponent)
4
Transmission
Opportunity Slots
in 32 usec Units
94 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.
Other Settings
Arbitrary Inter-
frame Space
Number
2 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:
z arbitrary inter-frame space number (AIFSN)
z minimum and maximum contention window (CW) size
Minimum
Contention
Window (Exponent)
2
Maximum
Contention
Window (Exponent)
3
Transmission
Opportunity Slots
in 32 usec Units
47 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.
Table 52 Aruba Configuration > Profiles > SSID > EDCA Station Profile Settings (Continued)
Field Default Description
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