From: A dynamic adjustable contention period mechanism and adaptive backoff process to improve the performance for multichannel mesh deterministic access in wireless mesh LAN
AC
r value
AIFSN
CWmin
CWmax
AC0
r = 0
2
7
31
AC1
0 < r < 0.5
15
63
AC2
0.5 ≦ r < 1
127
AC3
r ≧ 1
255