harshness: Authority to operate in a given area (and, if so, which spectrum to broadcast and receive on flows from that), I guess, is probably the most important?
But without GPS for time, it wouldn't work. While NTP might be easier as you argue, it can be exponentially less accurate (GPS time being accurate to ~1 microsecond, NTP being accurate to ~10 to ~100 milliseconds). LTE and CDMA need accuracy greater than NTP can predictably, reliably provide.
But without GPS for time, it wouldn't work. While NTP might be easier as you argue, it can be exponentially less accurate (GPS time being accurate to ~1 microsecond, NTP being accurate to ~10 to ~100 milliseconds). LTE and CDMA need accuracy greater than NTP can predictably, reliably provide.