A Semi-Markov Process Model for Performance Evaluation of DSRC Vehicular Safety Communication

Table 2

Access parameter for IEEE 802.11p EDCA.

AC	CWmin	CWmax	AIFSN	TXOP limit
3	aCWmin	aCWmax	9	0
2	aCWmin	aCWmax	6	0
1	(aCWmin + 1)/2 − 1	aCWmin	3	0
0	(aCWmin + 1)/4 − 1	(aCWmin + 1)/2 − 1	2	0