What does the ITU's IMT-2020 specification require for a network to count as "true 5G"?
IMT-2020 sets minimum requirements including peak data rate of 20 Gbit/s down / 10 Gbit/s up, peak spectral efficiency of 30/15 bit/s/Hz, user-plane latency of 4 ms (eMBB) or 1 ms (URLLC), control-plane latency < 20 ms, 100 MHz aggregated bandwidth, and a user-experienced rate of 100/50 Mbit/s.
IMT-2020 minimum requirements (the regulators' definition of 5G):
| Capability | Minimum requirement |
|---|---|
| Peak data rate | Down: 20 Gbit/s, Up: 10 Gbit/s |
| Peak spectral efficiency | Down: 30 bit/s/Hz, Up: 15 bit/s/Hz |
| User-plane latency | 4 ms (eMBB), 1 ms (URLLC) |
| Control-plane latency | < 20 ms (transition from "battery-efficient" state to continuous data transfer) |
| Bandwidth | max aggregated system bandwidth 100 MHz |
| User-experienced data rate | Down: 100 Mbit/s, Up: 50 Mbit/s (5% quantile of user throughput) |
Two distinctions worth noting:
- Peak vs. user-experienced: the 20 Gbit/s "peak" is under ideal conditions; the figure a real user should actually get (5% quantile) is only 100 Mbit/s. Marketing quotes peak; IMT-2020 also pins down the honest floor.
- eMBB vs. URLLC latency: 4 ms is fine for broadband, but URLLC demands 1 ms — which is why URLLC needed core-network changes (Release 16), not just new radio.
Who is IMT-2020? It's the ITU's requirement set — the same body that defined IMT-Advanced ("true 4G"). 3GPP's NR is the technology; IMT-2020 is the yardstick it must meet.
Tip: The number to remember is 20 Gbit/s peak down / 1 ms URLLC latency — the two figures that most define "5G on paper."
Go deeper:
IMT-2020 (Wikipedia) — the ITU's full requirements table (peak rate, latency, spectral efficiency, plus the connection-density 10⁶/km² and 500 km/h mobility targets this card doesn't list), and how ITU-R M.2150 formally blessed 3GPP's NR as IMT-2020.