User`s guide

Ubee Interactive Using the Wi-Fi Multimedia Option
Ubee DVW326 Advanced Wireless Voice Gateway Subscriber User Guide • March 2014 80
9.5 Using the Wi-Fi Multimedia Option
Use the Wi-Fi Multimedia option to configure the quality of service (QoS) to ensure the
best service in your wireless networks.
 Controls WLAN transmission priority on packets transmitted over the wireless network.
 Wi-Fi Multi-Media Quality of Service (WMM QoS) is a part of the IEEE 802.11e QoS
enhancement to certified Wi-Fi wireless networks.
 WMM QoS prioritizes wireless traffic according to the delivery requirements of the
individual user and applications. On wireless access points without WMM QoS, all
traffic streams are given the same access priority to the wireless network. If a new
traffic stream creates a data transmission demand that exceeds the current network
capacity, the new traffic stream reduces the throughput of the other traffic streams.
 WMM QoS capability allows you to assign access categories (ACs) to various packet
streams. The assigned AC of a packet stream depends on the packet’s priority, such
as a priority assigned by an application (also referred to as a user priority (UP). An AC
may include a common set of enhanced distributed channel access (EDCA)
parameters used by QoS to contend for a channel to transmit packets with certain
priorities.
Different ACs can be associated with different power saving parameters. For example,
one power saving parameter might be the delivery mechanism used by an access
point (AP) to deliver packets to a station (STA) that is operating in a reduced power
mode.
 WMM transmit opportunity (TXOP) is assigned to each access point. The bounded
time interval during which a station can send as many frames as possible as long as
the transmission time does not extend past the maximum duration of the TXOP. If a
frame is too large to be transmitted in a single TXOP, it should be fragmented into
smaller frames. Using TXOP reduces the problem of low rate stations gaining too
much channel time in the legacy 802.11 DCF MAC. A TXOP time interval of 0 means
it is limited to a single MAC service data unit (MSDU) or MAC management protocol
data unit (MMPDU).
Note
WMM may need to be disabled to avoid throughput impacts to other wireless devices.
Steps
To configure the multimedia wireless option:
1. Click Wireless from the main menu.
2. Click WMM (Wi-Fi Multimedia) from the left side menu. Field descriptions are listed
below the screen example.