The dynamics of the mmWave channel imply that the directional path to any cell can deteriorate rapidly, necessitating the need for intensive tracking of the mobile terminal.
A seamless interaction between mmWave cellular networks and transport protocols (e.g., TCP) will be the key to fully exploit the resources available at mmWave frequencies in an end-to-end connection.
While spectrum at mmWave frequencies is less scarce than at traditional frequencies below 6 GHz, still it is not unlimited. Therefore, an efficient use of the spectrum is critical to harvest the maximum benefit.
