A Road Layout Based Broadcast Mechanism for Urban Vehicular Ad Hoc Networks

Table 2

Number of broadcasts due to the reception of a safety message (A) and the number of broadcasts due to the discovery of a vehicle with no message by a beacon (B).

(a) Congestion scenario

Beacon cycle	VBURL		ABSM		ReC
	(A)	(B)	(A)	(B)	(A)	(B)
0.5	175.6	9.7	192.1	21148.1	573.9	9321.7
1.0	190.5	8.9	219.5	21727.2	371.8	1854.8
3.0	181.8	7.3	267.4	24039.6	796.7	1581.6
5.0	182.2	7.9	271.7	16707.0	751.6	875.3
7.0	193.7	8.3	305.4	11911.1	757.0	674.0
10.0	206.3	10.5	376.6	10384.6	754.3	346.8

(b) Smooth scenario

Beacon cycle	VBURL		ABSM		ReC
	(A)	(B)	(A)	(B)	(A)	(B)
0.5	155.1	3.6	174.8	2434.8	334.5	1692.7
1.0	157.7	3.1	190.2	2979.2	253.9	299.2
3.0	166.8	4	217.1	1831.2	227.5	135.4
5.0	175.2	4	249.3	1544.4	244.8	119.5
7.0	166.6	5.1	260.4	1318.0	287.1	97.3
10.0	194.8	5.4	271.5	1344.3	451.3	95.0