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Table 39: EDCA Parameters
Parameter
CWMax
AIFSN
Tx OP Limit
MSDU Lifetime
Admission Control
Mandatory
Wireless Multimedia Extensions (WME)/Quality of Service (QoS)
Description
Maximum Contention Window. Valid range is 0 to 65535.
Arbitration IFS per access category. Valid range is 2 to 15.
The Transmission Opportunity Limit. The Tx OP is an interval of time
during which a particular QoS enhanced client has the right to initiate a
frame exchange sequence onto the wireless medium. The Tx OP Limit
defines the upper limit placed on the value of Tx OP a wireless entity
can obtain for a particular access category. Valid range is 0 to 65535.
Specifies the maximum elapsed time between a MSDU transfer
request and delivery to the destination, beyond which delivery
becomes unnecessary. Valid range is 0 to 500 seconds.
Possible values are True or False. Admission control defines if an
Access Point accepts or rejects a requested traffic stream with certain
QoS specifications, based on available channel capacity and link
conditions. Admission control can be configured for each Access
Category (Index).
On the Policy sub-tab, you can also configure a medium maximum
threshold for all Admission Controls. Admission will be granted if the
new requested traffic stream and already admitted time is less than the
medium maximum threshold.
Issue 1 September 2004
2 of 2
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