GW-WR150N/GW-WR150ND 150Mbps Wireless Router User Manual
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When each priority queue waits for sending packets, it has to wait a fixed time
AIFSN and a random time CW. They define time values by multiple time slots. For
802.11b, its time slot is 20ms. The time slot of 802.11a and 802.11g is 9 ms. CW
insures the random delay time of DCF, so that the packets collision among the
devices with the same access category can be avoided. If collision occurs, CW is
doubled until it exceeds its maximum value. After every successful transmission,
CW returns to the minimum value.
The priority queue that succeeds in the competition of sending packets will acquire
Txop time to send packets. If the txop value is 0, it is limited to be a MSDC (MAC
Service Data Unit).
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Setting the WMM Parameters
Click the
WMM Configuration
button in the
Advanced Wireless Settings
page,
and the following page appears.