Evaluation Method of English Learning Engagement Based on Wireless Communication Network and Big Data

Table 3

Attribute indicators of free spectrum resources.

Spectrum	Spectrum type	Bandwidth (Kbps)	Delay (ms)	Jitter (ms)	Packet loss rate (%)
Free spectrum 1	Open ISM band	3500	120~470	12	<6
Free spectrum 2	Open ISM band	4500	110~470	23	<6
Free spectrum 3	Open band ISM	4000	100~470	18	<6
Free spectrum 4	Cellular network communication frequency band	1500	35~50	4	<1
Free spectrum 5	Cellular network communication frequency band	100	33~50	4	<1
Free spectrum 6	Cellular network communication frequency band	800	41~50	4	<1