QoS In WLAN. By Abdulbaset Hassan Muneer Bazama. Outline. Introduction QoS Parameters. 802.11 medium access control schemes (MAC). 802.11e medium access control schemes (MAC). Conclusion . Reference. Introduction. What is 802.11?
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Packet loss rate.
There are two basic medium access control (MAC) modes:
B1 = 5
B2 = 10
B2 = 20
B2 = 15Example of DCF
B1 and B2 are backoff intervals
at nodes 1 and 2
There are two methods of channel access:
Scheduler (resolves virtual collisions by granting TXOP to highest priority
8 User priorities per QSTA
8 User priorities mapping to 4 Access Categories
Pri 8EDCA (Cont.)
Transmission Opportunity (TXOP): is the time interval permitted for a particular STA to transmit packets.