Adaptive Beaconing in Mobility Aware Clustering Based MAC Protocol for Safety Message Dissemination in VANET

Table 2

Contention parameters for CCH interval and SCH interval in IEEE 802.11p [10–12].

AC number	Access category	CCH interval				SCH interval
				AIFSN	(µs)			AIFSN	(µs)
0	Background traffic (BK)	15	1023	9	149	31	1023	7	123
1	Best effort (BE)	7	15	6	110	31	1023	3	71
2	Video (VI)	3	7	3	71	15	31	2	58
3	Voice (VO)	3	7	2	58	7	15	2	58