C
HAPTER
7
| Wireless Configuration
Advanced Settings
ā 81 ā
ā Packet Aggregate ā A performance enhancement that combines data
packets together when the feature is supported by compatible clients.
(Default: Enabled)
WI-FI MULTIMEDIA The Wireless Broadband Router implements Quality of Service (QoS) using
the Wi-Fi Multimedia (WMM) standard. Using WMM, the access point is able
to prioritize traffic and optimize performance when multiple applications
compete for wireless network bandwidth at the same time. WMM employs
techniques that are a subset of the developing IEEE 802.11e QoS standard
and it enables access points to interoperate with both WMM-enabled clients
and other devices that may lack any WMM functionality.
WMM defines four access categories (ACs): voice, video, best effort, and
background. These categories correspond to traffic priority levels and are
mapped to IEEE 802.1D priority tags (see Tab l e 3). The direct mapping of
the four ACs to 802.1D priorities is specifically intended to facilitate
interoperability with other wired network QoS policies. While the four ACs
are specified for specific types of traffic, WMM allows the priority levels to
be configured to match any network-wide QoS policy. WMM also specifies a
protocol that access points can use to communicate the configured traffic
priority levels to QoS-enabled wireless clients.
The Wi-Fi Multimedia section on the Wireless Settings Advanced page
allows you to enable WMM and set detailed QoS parameters.
Figure 38: Wi-Fi Multimedia Settings
Table 3: WMM Access Categories
Access
Category
WMM
Designation
Description 802.1D
Tags
AC_VO (AC3) Voice Highest priority, minimum delay. Time-sensitive
data such as VoIP (Voice over IP) calls.
7, 6
AC_VI (AC2) Video High priority, minimum delay. Time-sensitive
data such as streaming video.
5, 4
AC_BE (AC0) Best Effort Normal priority, medium delay and throughput.
Data only affected by long delays. Data from
applications or devices that lack QoS
capabilities.
0, 3
AC_BK (AC1) Background Lowest priority. Data with no delay or
throughput requirements, such as bulk data
transfers.
2, 1
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