Dell PowerConnect W-Airwave Configuration Manual page 133

Table 50 Aruba Configuration > Profiles > SSID > EDCA Profile Settings (Continued)
Field
Transmission
Opportunity Slots
in 32 usec Units
ACM
Video
Arbitrary Inter-
frame Space
Number
Minimum
Contention
Window (Exponent)
Maximum
Contention
Window (Exponent)
Transmission
Opportunity Slots
in 32 usec Units
ACM
Other Settings
Arbitrary Inter-
frame Space
Number
Minimum
Contention
Window (Exponent)
Maximum
Contention
Window (Exponent)
Transmission
Opportunity Slots
in 32 usec Units
AirWave Wireless Management Suite | Configuration Guide
Default Description
0 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.
No Define whether or not admission control mandatory (ACM) is to be
supported on APs configured with this EDCA profile.
1 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:
3
arbitrary inter-frame space number (AIFSN)
minimum and maximum contention window (CW) size
4
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.
No Define whether or not admission control mandatory (ACM) is to be
supported on APs configured with this EDCA profile.
1 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:
2
arbitrary inter-frame space number (AIFSN)
minimum and maximum contention window (CW) size
3
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.
Aruba Configuration Reference | 133