Due to scarcity of spectrum at conventional cellular frequencies (CCF), the use of higher frequencies such as mmWave has been proposed for 5G cellular networks. The cellular systems consist of multiple networks, each deployed by an independent cellular operator with possibly closed access only to its customers. It is worth noting that communication at mmWave frequencies has non-trivial differences when compared to communication at CCF.
As mobile wireless communications progress, the Federal Communications Commission (FCC) is exploring technologies that could lead to the emergence of a new generation of millimeter wave (mmWave) wireless spectrum by the year 2020. Before mmWave carrier frequencies can be applied to cellular networks, spectrum allocations and regulatory frameworks must be determined.