Cisco Cisco Aironet 350 Mini-PCI Wireless LAN Client Adapter Guide De Conception
5-7
Enterprise Mobility 4.1 Design Guide
OL-14435-01
Chapter 5 Cisco Unified Wireless QoS
Wi-Fi Multimedia
Figure 5-5
Growth in Random Backoff Range with Retries
Note
These values are for 802.11b, and values can be different for different physical layer implementations.
Wi-Fi Multimedia
This section describes three WMM implementations:
•
WMM access
•
WMM power save
•
Access control
WMM Access
WMM is a Wi-Fi Alliance certification of support for a set of features from an 802.11e draft. This
certification is for both clients and APs, and certifies the operation of WMM. WMM is primarily the
implementation of the EDCA component of 802.11e. Additional Wi-Fi certifications are planned to
address other components of the 802.11e.
certification is for both clients and APs, and certifies the operation of WMM. WMM is primarily the
implementation of the EDCA component of 802.11e. Additional Wi-Fi certifications are planned to
address other components of the 802.11e.
WMM Classification
WMM uses the 802.1P classification scheme developed by the IEEE (which is now a part of the 802.1D
specification).
specification).
aCWmin
aCWmax
31
63
127
255
511
1023 1023 1023
retries
91230