Two-Layer Hierarchy Optimization Model for Communication Protocol in Railway Wireless Monitoring Networks

Table 2

The relationship between optimal cluster number, network length, and sensors’ number.

Sensors’ number	Network length/m
	300	500	1000	1500	2000	2500	3000
50	4.40	5.68	8.03	9.83	11.36	12.7	13.91
100	6.22	8.03	11.36	13.91	16.06	17.96	19.67
150	7.62	9.83	13.91	17.04	19.67	22.00	24.10
200	8.80	11.36	16.06	19.67	22.72	25.40	27.83