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802.11n Access Points - Software Management Guide 64
Tabulated below are the ‘QoS EDCA’ parameters and the method to configure the configurable parameters:
Click OK and COMMIT, to save the configured parameters.
Parameter Description
Access Category Specifies a label for the common set of EDCA parameters that are used by a QoS Station/AP
to contend for the channel in order to transmit MSDUs with certain priorities.Available
access categories are:
– Background
– Best Effort
–Video
–Voice
Tabulated below are the default EDCA parameters for the wireless client (Station) and AP
device, specific to each access category.
‘Access Category’ is a read-only parameter and cannot be configured.
CW Min Specifies the minimum value for Contention Window (CW) for the wireless QoS EDCA
profile. To configure, enter the CW Min in the range of 0 to 32767, for both wireless client
and AP device.
CW Max Specifies the maximum value for Contention Window (CW) for the wireless QoS EDCA
profile. To configure, enter the CW Max in the range of 0 to 32767, for both wireless client
and AP device.
AI FSN Specifies the Arbitration Inter-Frame Space Number (AI FSN) per access category. To
configure, enter the AI FSN in the range of 2 to 15 for Station and 1 to 15 for AP.
TxOP The Transmission Opportunity Limit (TxOP) is a time interval for the QoS enhanced client to
initiate a frame exchange on the wireless medium. The TxOP Limit defines the upper limit
based on the TxOP value a wireless entity can obtain for a particular access category.
To configure, enter the TxOP in the range of 0 to 8160, for both Station and AP device.
ACM The Admission Control Mandatory (ACM) defines, if an AP device accepts or rejects a request
traffic stream with certain QoS specifications, based on available channel capacity and link
conditions.
To configure ACM for each access category, select either Enable or Disable from the drop
down menu
Access
Category
Default EDCA Parameters for
Station
Default EDCA Parameters for AP
CW
Min
CW
Max
AIFS Tx OP
(Unsigned
Integer)
CW
Min
CW
Max
AIFS Tx OP
(Unsigned
Integer)
Background 15 1023 7 0 15 1023 7 0
Best Effort 15 1023 3 0 15 63 3 0
Video 7 15 2 3.008 ms 7 15 1 3.008 ms
Voice 3 7 2 1.504 ms 3 7 1 1.504 ms
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