A Data-Driven Customer Quality of Experience System for a Cellular Network

Table 1

Variable selection via clustering analysis.

Group	Group characteristics	Size (%)	Comp. call ratio (normal)	Drop rate	TX def. rate	RX def. rate
(1)	Normal	95.4	0.08% (1.00)	0.09%	0.50%	1.75%
(2)	Bad one-way call	4.5	0.12% (1.57)	0.16%	0.12%	4.87%
(3)	Bad drop rate, bad eMOS	.01	0.30% (3.75)	70.52%	9.46%	2.81%