Is Hata Path loss model a macro-cell model only? a question of debate

Since the first publication of Hata Path loss model in 1980, it was imposed by the author that the model is valid for distances more than 1 km. Therefore, Researchers have categorized the model to suit Macro cells of distances from 1 km up to 20 km. Many recent and older researches have argued that Hata model can be used even in micro cell distances down to tens of meters from the transmitter under certain conditions. Accurate results are achieved in such distances which supports the claim that this model is precise enough down to tens of meters. The argument is to evaluate between simplicity, and cost efficacy of applying Hata model verses optimum accuracy required in view of the fact that real measurements are to be collected after all. In this brief article, arguments are highlighted to realize if this model is a matter of choice to be used in micro cells, and though the imposed constrained as the range of validity to be greater than 1 km, would be relaxed. Examples are given to support the claim.

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