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Chapter 19: Quality Of Service (QoS)
Configuring AP EDCA Parameters
196 Psion Teklogix 9160 G2 Wireless Gateway User Manual
is the case on both one-radio and two-radio APs.
QoS on the access point leverages existing information in the IP packet header related to
Type of Service ( ToS ). The access point examines the ToS field in the headers of all packets
that pass through the AP. Based on the value in a packet’s ToS field, the AP prioritizes the
packet for transmission by assigning it to one of the queues. A different type of data is asso-
ciated with each queue. You can configure parameters that determine how each queue is
treated when it is sent by the access point.
Configuring Quality of Service includes:
•
“Configuring AP EDCA Parameters” on page 196.
• “Enabling/Disabling Wi-Fi Multimedia” on page 198.
• “Updating Settings” on page 200.
19.2.1 Configuring AP EDCA Parameters
AP Enhanced Distributed Channel Access (EDCA) Parameters affect traffic flowing from
the access point to the client station.
Table 19.3 AP EDCA Parameters
Field Description
Queue
Queues are defined for different types of data transmitted from AP-to-station:
Data 0 (Voice)
High priority queue, minimum delay. Time-sensitive data such as VoIP and streaming media are auto-
matically sent to this queue.
Data 1(Video)
High priority queue, minimum delay. Time-sensitive video data is automatically sent to this queue.
Data 2 (best effort)
Medium priority queue, medium throughput and delay. Most traditional IP data is sent to this queue.
Data 3 (Background)
Lowest priority queue, high throughput. Bulk data that requires maximum throughput and is not time-
sensitive is sent to this queue (FTP data, for example).
For more information, see “QoS Queues And Parameters To Coordinate Traffic Flow” on page 188.