Heterogeneous Wireless Sensor Network for Transportation System Applications

Table 1

Summary of test results for laboratory environment.

rpm	Number of enquiries	Lost engine data∗ (𝑛,%)	Cylinder WICO latency				Serial latency average (ms), standard deviation (ms)
			average (ms), standard deviation (ms)
			Cyl.; WICO1	Cyl.; WICO2	Cyl.; WICO3	Cyl.; WICO4
1000	5717	88, 1.5	27, 3	4, 2	20, 3	16, 3	119, 7
2000	2603	12, 0.5	33, 3	11, 2	27, 3	23, 4	125, 6
3000	2952	36, 1.2	35, 2	13, 2	29, 3	25, 3	128, 3
4000	7445	72, 1.0	37, 2	15, 2	30, 2	26, 3	128, 6
5000	2631	24, 0.9	37, 2	15, 2	31, 2	27, 3	128, 3
6000	2024	12, 0.6	38, 3	16, 2	31, 3	27, 3	130, 4

∗Excluding lost packets from Oil WICO.