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Chapter 19: Quality Of Service (QoS)
Updating Settings
Table 19.4 Station EDCA Parameters
Field
cwMax
(Maximum Conten-
tion Window)
TXOP Limit
19.3
Updating Settings
To update QoS settings:
1. Navigate to the QoS tab page.
2. Configure the QoS settings as required.
3. Click the Update button to apply the changes.
200
Psion Teklogix 9160 G2 Wireless Gateway User Manual
Description
The value specified here in the Maximum Contention Window is the upper limit (in milliseconds) for
the doubling of the random backoff value. This doubling continues until either the data frame is sent or
the Maximum Contention Window size is reached.
Once the Maximum Contention Window size is reached, retries will continue until a maximum number
of retries allowed is reached.
For more information, see "Random Backoff And Minimum/Maximum Contention Windows" on
page 191.
Station EDCA Parameter Only (The TXOP Limit applies only to traffic flowing from the client station to
the access point.)
The Transmission Opportunity (TXOP) is an interval of time when a WME client station has the right
to initiate transmissions onto the wireless medium (WM).
This value specifies (in milliseconds) the Transmission Opportunity (TXOP) for client stations; that
is, the interval of time when a WMM client station has the right to initiate transmissions on the wireless
network.
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