Appendix B - Specifications
-
WMM Application Functions
WMM Enable
If you have other devices on your network that support
WMM, Select
Enabled
. Otherwise, keep it disabled.
APSDCapable
Automatic Power Save Delivery is a more efficient power
management method than legacy 802.11 Power Save Polling.
Most newer 802.11 STAs already support a power
management mechanism similar to APSD.
DLSCapable
Direct Link Setup allows direct STA-to-STA frame transfer
within a BSS. This is designed for consumer use, where
STA-to-STA transfer is more commonly used.
Apply Changes
Click to save the current settings.
Reset
Click to clear the current changes.
WMM Parameter
Configure
There are two categories of parameters
:
APAifsn,
APCwmin, APCwmax, APTxop, APACM are the parameters
for configuring AP.
BSSAifsn, BSSCwmin, BSSCwmax, BSSTxop, BSSACM
are for configuring Station
T
AC:
Access Category
AC_BE
:
Best Effort (high priority)
AC_BK
:
Background (low priority)
AC_VI
:
Video (video first)
AC_VO
:
Voice (voice first)
If you want to alter any of the parameters above, please refer
to the instructions of your WMM products.
Instructions of the parameters of WMM
Aifsn
:
Arbitrary Inter-Frame Space Number
The back-off timing for each access category consists of a
fixed period called the
Arbitrary Inter-Frame Space Number
followed by a random period called the
Contention
Window (CW),
both specified in multiples of the slot time.
If the service you are using is VI or VO, the value of the
parameters of AC_VI or AC_VO should be smaller. If
the service is E-Mail or Web, the value of the parameters
of AC_BE or AC_BK should be greater.
Cwmin
:
Contention Window-Min.
Cwmax
:
Contention Window-Max.
The maximum and the minimum value of Contention
Window both affect the back-off timing of WMM access
category. In AC_VI and AC_VO, the difference between
the maximum and minimum value should be smaller,
however, in AC_BE and AC_BK the difference between
the maximum and minimum value should be greater.
Txop
:
Transmission Opportunity
Txop can optimize the configuration of WMM access.
Those which need prior WMM access, such as AC_VI
and AC_VO, need greater value of parameters.