Huawei AR1200 Series - Configuring a Radio Qos Policy

l ECWmin and ECWmax: determine the average backoff time. A larger value indicates a
longer average backoff time.
l Transmission opportunity limit (TXOPLimit): determines the maximum duration in which
an AP or a STA can occupy a channel. A greater TXOPLimit value indicates a longer
duration. If this parameter is set to 0, an AP or a STA can send only one packet each time
it occupies a channel.
l ACK policy: determines whether to send an ACK packet to confirm the receiving of a
unicast packet. In normal ACK mode, the receiver sends an ACK packet to confirm the
receiving of a unicast packet from the sender. In no ACK mode, if the communication
quality is good and interference is low, no ACK packet is sent to confirm the receiving of
a unicast packet from the sender. This prevents packet retransmission and improves the
transmission efficiency.
EDCA parameters and other WMM parameters are managed in a WMM profile. After a WMM
profile is created, it is bound to a radio profile and then applied to a radio together with the radio
profile.
VAP QoS Policy Management
When an AP receives 802.11 packets from a STA, it converts the packets into 802.3 packets.
After receiving the 802.3 packets, the AC forwards the packets to a network-side device. During
packet transmission, the AC schedules the 802.3 packets based on the 802.1p priorities in the
packets .
After receiving the 802.3 packets from the network-side device, the AP converts the packets
into 802.11 packets and schedules the packets into different AC queues based on user priorities
before sending them to user terminals.
VAP QoS policies are managed by using a traffic profile. Table 3-1 lists parameters in a traffic
profile.
Table 3-1 Parameters in a traffic profile
Parameter
Description
Client/VAP
upstream rate limit
Limits the upstream rate of a STA or VAP.
802.1p priority in
802.3 packets
Specifies the 802.1p priority in 802.3 packets received by an AP. The
802.1p priority can be set or mapped from the user priority in 802.11
packets sent by a STA.
Priority in 802.11
packets
Specifies the priority of 802.11 packets sent by an AP.
After a traffic profile is created, it is bound to a service set and applied to the corresponding
VAP along with the service set.
3.3 Configuring a Radio QoS Policy
A radio QoS policy controls an AP's capability to compete for channels and determines the
quality of services provided for the AP.
Huawei AR1200 Series Enterprise Routers
Configuration Guide - WLAN 3 WLAN QoS Configuration
Issue 03 (2012-01-06) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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