tokens: A first - of - its - kind RMa propagation measurement campaign at 73 GHz was conducted in a rural area to confirm the accuracy and validity of the proposed CI RMa model , while demonstrating the remarkable distances and coverage that may be obtained using mmWave communication beyond 10 km in an RMa scenario ( the NLOS model in is limited to 5 km , and there was no effort to validate the 3GPP model , except for a few measurements to only 500 m ) .