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Configure the DPH650
Wifi-multimedia
You can enable Wi-Fi Multimedia (WMM) support to help improve the Quality of
Service (QoS) for your wireless traffic. We recommend that you leave the settings
unchanged if you are not sure with your configuration. Changing the values may
lead to unexpected blockages of traffic on your wireless LAN; the blockages may be
difficult to diagnose.
The WMM screen provides two separate menus to set up the parameters: one is for
the DPH650 and the other one is for Wireless Stations.
Typically, voice and video traffic types are delay-sensitive, but are tolerant of some
frame losses. On the other hand, data traffic type is delay-tolerable, but requires loss
free transmission. So you may adjust these parameters with regard to the
characteristics of these types of data to better manage your network flow.
AC (Access Category): Uses the following access categories, which are listed
from high to low:
- VO: Voice
- VI: Video
- BE: Best Effort
- BK: Background
AIFS (Arbitrary Interframe Space): An Interframe Space for different Access
Category
TXOP (Transmission Opportunity): WMM (Wireless Multimedia)
Transmission Opportunity: Defined by IEEE 802.11e, the TXOP is the interval of
time when a particular STA (station) has the right to initiate transmissions.
ACM (Admission Mandatory): Advertised in the EDCA parameter set element
to indicate the admission control is required for each of the ACs.
EDCA AP Parameters: The values of AIFS, CWmin, and CWmax are announced
by the DPH650 via beacon frames. The DPH650 can adapt these parameters
dynamically depending on the network conditions. Basically, the smaller AIFS
and CWmin, the shorter the channel access delay for the corresponding priority,
and hence the more capacity share for a given traffic condition. However, the
probability of collisions increases when operating with smaller CWmin.
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