Dell PowerConnect W-Airwave W-Airwave 7.2 Configuration Guide - Page 116

Profiles > SSID > EDCA AP, Dell PowerConnect W Navigation, pencil, Details, General Settings

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In addition, you can configure the TXOP duration for each AC. On the controller, you configure the AC priorities in the WLAN EDCA parameters profile. There are two sets of EDCA profiles you can configure:  AP parameters affect traffic from the AP to the client  STA parameters affect traffic from the client to the AP Perform these steps to create or edit EDCA AP profiles. 1. Select Profiles > SSID > EDCA AP in the Dell PowerConnect W Navigation pane. This page summarizes the current profiles of this type. 2. Select the Add button to create a new EDCA AP profile, or click the pencil icon to edit an existing profile. The Details page appears. Complete the settings as described in Table 50: Table 50 Dell PowerConnect W Configuration > Profiles > SSID > EDCA AP Profile Settings Field Default Description General Settings Folder Top Name Blank Best Effort Arbitrary Inter-frame 3 Space Number (1-15) Minimum Contention 4 Window (Exponent) (0-15) Maximum Contention 6 Window (Exponent) (1-15) Transmission 0 Opportunity Slots in 32 uSec Units Background Arbitrary Inter-frame 7 Space Number Minimum Contention 4 Window (Exponent) Maximum Contention 10 Window (Exponent) Set the folder with which the profile is associated. The drop-down menu displays all folders available for association with the profile. Name of the EADC AP profile. 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. 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 116 | Dell PowerConnect W Configuration Reference Dell PowerConnect W AirWave 7.2 | Configuration Guide

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Dell PowerConnect W Configuration Reference
Dell PowerConnect W AirWave 7.2
| Configuration Guide
In addition, you can configure the TXOP duration for each AC. On the controller, you configure the AC priorities
in the WLAN EDCA parameters profile. There are two sets of EDCA profiles you can configure:
AP parameters affect traffic from the AP to the client
STA parameters affect traffic from the client to the AP
Perform these steps to create or edit EDCA AP profiles.
1.
Select
Profiles > SSID > EDCA AP
in the
Dell PowerConnect W Navigation
pane. This page summarizes
the current profiles of this type.
2.
Select the
Add
button to create a new EDCA AP profile
,
or click the
pencil
icon to edit an existing profile.
The
Details
page appears. Complete the settings as described in
Table 50
:
Table 50
Dell PowerConnect W Configuration > Profiles > SSID > EDCA AP Profile Settings
Field
Default
Description
General Settings
Folder
Top
Set the folder with which the profile is associated. The drop-down menu displays all
folders available for association with the profile.
Name
Blank
Name of the EADC AP profile.
Best Effort
Arbitrary Inter-frame
Space Number
(1-15)
3
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
Minimum Contention
Window
(Exponent)
(0-15)
4
Maximum Contention
Window
(Exponent)
(1-15)
6
Transmission
Opportunity Slots in 32
uSec Units
0
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.
Background
Arbitrary Inter-frame
Space Number
7
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
Minimum Contention
Window
(Exponent)
4
Maximum Contention
Window
(Exponent)
10