The requirements document turns the concept into testable constraints: an offline Wi-Fi mesh with BATMAN-adv, local Push-To-Talk voice, and clear limits for the airborne relay.
The important numbers are these: payload under 500 g, mission time above 30 minutes, RSSI > -75 dBm, SNR > 20 dB, median RTT under 50 ms, and packet loss under 10%.