Heterogeneous Wireless Sensor Network for Transportation System Applications

Table 2

Summary of test results for engine 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	1810	16, 0.9	10, 2	26, 3	3, 2	19, 2	124, 5
2000	3731	30, 0.8	11, 2	19, 3	33, 3	28, 3	132, 6
3000	1644	12, 0.7	13, 2	21, 2	35, 2	31, 3	132, 5
4000	—	—	—	—	—	—	—
5000	—	—	—	—	—	—	—
6000	1967	24, 1.2	15, 3	23, 2	37, 3	33, 3	133, 3

∗Excluding lost packets from Oil WICO.