I simulated with previous Okumura-Hata model for outdoor, ITU-Indoor path loss model for indoor environment (they are limited to 150-1900 MHz) since I didn't find out a widely used path loss model for mmWave.

But the simulation has a large difference with reality measurement value (frequency at 28GHz).

Is there any better model so that the simulation matches better with the reality measurement result?

Thank you in advance!