Eno E. E. Akarawak* | Ismaili I. Adeleke
OPEN ACCESS
The aim of this work is to model the pathway from caller to recipient of GSM telecommunication in Nigeria, with a view to produce a model that can help reduce the problem of drop calls experienced in the industry. Our dependent variable was total successful calls against 9 explanatory variables. An initial multiple linear regression produced low R2 of 25.5%. Diagnostics interventions of some transformations with removal of leverage points improved the R2 to 82%. Two model selection techniques, Mallow’s Cp and adjusted R2 were used to obtain the best parsimonious model, which contained 7 explanatory variables. The results show that the main variables that explain total successful call are Percentage drop calls, Proportion of transmission failure, Call traffic Congestion, Control channel failure, Earlang, P_HR and Availability. We, therefore, advise telecommunication industries in Nigeria to use the model to counteract the problem of drop calls.
Telecommunication pathway, drop calls, Box-Cox transformation, Mallow’s Cp, model selection.
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