.. these descriptions didn’t quite capture the essence of 5G, which is that it’s a collection of technologies and design approaches that are being pulled together under the auspices of the 3GPP to develop a standard to meet the ITR-U’s “IMT-2020” vision of what a connected world should be capable of.
To that end, it has put out a number of minimum requirements, such as a downlink rate of 20 Gbits/s, uplink rates of 20 Gbits/s, user-plane latency of 1 ms, control-plane latency of 20 ms (10 ms “encouraged”), the ability to support up to 1 million devices/km2, 90% reduction in network energy usage, 99.999% network availability, among many others.
The point is that 5G isn’t a “technology” per se, it’s a means of wringing the most out of available spectrum and be able to use that spectrum in a flexible, secure, reliable manner.
Under 5G, researchers, silicon providers, system designers, and test and measurement engineers are working to figure out how best to realize the IMT-2020 vision, which requires a rethink of everything, from the radio front end to the core network.
Source: Time for a Reality Check to 5G Exuberance | Design News