This is typical bullshit marketing propped up by telco equipment manufacturers if not the telcos themselves.
The link between Korea & Finland is the good old Internet - a mesh of Ethernet and fibre cables. No 5G there.
5G could be used as the last mile but so can 4G and Wi-Fi, and in this case the latter technologies are just as good considering you don't actually need high bandwidth, merely low and stable-enough latency (a well-tuned and uncongested 4G network is good enough).
5G is absolutely not the enabler in controlling a factory across the world - this has been possible since the beginning of the Internet.
>The core of successfully demonstrating the technology is ultra-low latency communication technology. The communication delay between a distance of over 10,000 km is less than 0.3 seconds.
How exactly is this possible via 5G? The theoretical propagation delay over a distance of 10.000km is 0.033 seconds[1].
0.3 seconds would not be surprising. The calculator you're using doesn't take into account:
1. The speed of light in a fiber is only 2/3 the speed of light in a vacuum (look it up)
2. Internet routes are far from a straight line, especially for international communication. The network distance is a multiple of the physical distance
3. Most protocols require more than one roundtrip per communication (because most protocols are implemented on local networks and the designers never notice extra roundtrips creeping in)
I'd bet good money the 5G is only used as the last mile from the operator's phone/tablet, assuming he even is using 5G and didn't accidentally leave it connected to Wi-Fi (not that they'd notice any difference, because again 5G is not adding anything new here - the heavy lifting is done by the good old Internet).
The link between Korea & Finland is the good old Internet - a mesh of Ethernet and fibre cables. No 5G there.
5G could be used as the last mile but so can 4G and Wi-Fi, and in this case the latter technologies are just as good considering you don't actually need high bandwidth, merely low and stable-enough latency (a well-tuned and uncongested 4G network is good enough).
5G is absolutely not the enabler in controlling a factory across the world - this has been possible since the beginning of the Internet.