Motorola WS5100 manual Data QoS, DCSCP to AC Mapping, 1.2.2.13Wireless Layer 2 Switching

Overview 1-15

disconnect. With QoS, the VoIP conversation (a real-time session), receives priority, maintaining a high level of voice quality. The voice QoS used by the switch ensures:

•Strict Priority

•Spectralink Prioritization

•VOIP Prioritization (IP ToS Field)

•Multicast Prioritization

Data QoS

The switch supports the following for data QoS techniques:

•Egress Prioritization by WLAN

•Egress Prioritization by ACL

DCSCP to AC Mapping

The switch provides for the arbitrary mapping between Differentiated Services Code Point (DCSCP) values and WMM Access Categories. This mapping can be set manually.

1.2.2.13Wireless Layer 2 Switching

The switch supports the following layer 2 wireless switching techniques:

•WLAN to VLAN

•MU User to VLAN

•WLAN to GRE

1.2.2.14Automatic Channel Selection

Automatic channel selection works as follows:

1.When a new AP is adopted, it scans each channel. However, the switch does not forward traffic at this time.

2.The switch then selects the least crowded channel based on the noise and traffic detected on each channel.

3.The algorithm used is a simplified maximum entropy algorithm for each radio, where the signal strength from adjoining AP's/MU's associated to adjoining AP's is minimized.

4.The algorithm ensures adjoining AP's are as far away from each other as possible in terms of channel assignment.

NOTE: Individual radios can be configured to perform automatic channel selection.

1.2.2.15WMM-Unscheduled APSD

This feature is also known as WMM Power Save or WMM-UPSD (Unscheduled Power Save Delivery). WMM-UPSD defines an unscheduled service period, which are contiguous periods of time during which the switch is expected to be awake. If the switch establishes a downlink flow and specifies UPSD power management, then it requests and the AP delivers buffered frames associated with that flow during an unscheduled service period. The switch initiates an unscheduled service period by transmitting a trigger frame, where a trigger frame is defined as a data frame (e.g. an uplink voice frame) associated with an uplink