Quality Of Service Configuration - Motorola WS2000 System Reference Manual

Beacon Settings
AP SIP Call
Admission
Control
Click Apply in the Access Port window to save changes.

5.7 Quality of Service Configuration

Disruptions in service in a wireless environment can be a significant issue in environments that have high
bandwidth demands (for example, when VoIP and video broadcasts are commonplace). Wireless Internet
users can also suffer disruptions due to environmental conditions, such as adverse transmission situations
or a large number of wireless devices that affect radio frequency communications. The WS 2000 Wireless
Switch allows an administrator to adjust several parameters that can improve the quality of service (QoS) to
wireless users.
Select Wireless -->
be shared, how to distribute the bandwidth among the WLANs that are in service, or how to prioritize voice
and multicast communications.
Set the Access Port beacon settings by clicking
the Beacon Settings button.
Beacon Interval
A beacon is a packet broadcast by the adopted
Access Ports to keep the network synchronized.
Included in a beacon is information such as the
WLAN service area, the access-port address, the
broadcast destination addresses, a time stamp,
and indicators about traffic and delivery such as a
DTIM.
Specify a beacon interval in units of 1,000 microseconds (K-us). This is a multiple of the DTIM
value, for example, 100 : 10. Increase the DTIM/beacon settings, lengthening the time, to let
nodes sleep longer and preserve their battery life. Decreasing this value (shorten the time) to
support streaming-multicast audio and video applications that are jitter-sensitive.
DTIM Period
A DTIM is periodically included in the beacon frame that is transmitted from adopted Access
Ports. The DTIM period determines how often the beacon contains a DTIM, for example, 1
DTIM for every 10 beacons. The DTIM indicates that broadcast and multicast frames, buffered
at the Access Port, are soon to arrive. These are simple data frames that require no
acknowledgment, so nodes sometimes miss them.
In this field, the administrator can specify a period for the Delivery Traffic Indication Message
(DTIM). This is a divisor of the beacon interval (in milliseconds); for example, 10 : 100.
Increase the DTIM/beacon settings, lengthening the time, to let nodes sleep longer and
preserve their battery life. Decrease this settings (shortening the time) to support streaming-
multicast audio and video applications that are jitter-sensitive.
DTIM Per BSS— The administrator can specify a period for the Delivery Traffic Indication
Message (DTIM) per BSSID. This is a divisor of the beacon interval (in milliseconds); for
example, 10 : 100. Increase the DTIM/beacon settings, lengthening the time, to let nodes
sleep longer and preserve their battery life. Decrease this settings (shortening the time) to
support streaming-multicast audio and video applications that are jitter-sensitive.
Click Ok when finished setting the beacon settings.
Specify the number of concurrent SIP sessions allowed for this Access Port.
SIP is the Session Initiation Protocol which controls sessions for multimedia and voice
conferences.
Wireless QoS from the navigation menu on the left to specify how the bandwidth can
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Wireless Configuration