Buffalo WAPS-APG600H User Manual page 48

QoS
WMM-EDCA Settings: In normal use, these settings do not need to be changed.
WMM Parameters
Select whether enable or disable QoS.
Disable
No priority is assigned for any communication. All frames are processed
in order of input.
Enable
Priority control is performed using WMM-EDCA for communication
between the AirStation and the wireless device. QoS must be enabled at
both the AirStation and wireless device sides.
All communication with unsupported devices and broadcast or multicast
communication is performed at the priority "AC_BE".
The default values for the Access Point (AirStation) and Station (wireless
device) are shown below.
Priority Parameters
CWmin
CWmax
AC_BK (Low)
Aifsn
Txop
CWmin
CWmax
AC_BE (Nomal)
Aifsn
Txop
CWmin
CWmax
AC_VI (High)
Aifsn
Txop
CWmin
CWmax
AC_VO
(Highest)
Aifsn
Txop
CWmin, CWmax
This sets the maximum and minimum values of the contention window.
The contention window is used in the frame collision avoidance
mechanism that is performed in IEEE802.11, and generally, smaller values
in the window result in a higher likelihood that the queue will obtain
sending rights.
Aifsn
Sets the frame sending interval. The units are slots (same as window
value defined in CWmin and CWmax). Smaller frame sending intervals
enable earlier start times for the backoff algorithm, and so this results in
a higher priority for the queue.
Txop
This shows the time that can be assigned when the queue obtains
sending rights. One unit is 32 ms. Longer times enables the transfer of
more frames by the sending rights obtained at one time, but this also
harms the realtime responsiveness of other queues.
48
AP STA
4 4
10 10
7 7
0 0
4 4
6 10
3 3
0 0
3 3
4 4
1 2
94 94
2 2
3 3
1 2
47 47