What about next? Core network bandwidth must grow rapidly!

There is really no time, so this article is very short!
At present OC-768 are normal link, let alone OC-192!
For routers, the exit queue needs n Speedup, take OC-192 as an example, 4 interface router needs 40Gbps bandwidth to adapt to the queuing demand, outside the heavy rain, can not let people platoon outside it. And this is a huge challenge, so the whole switch to the input queue, but the challenge to the software, that is, scheduling algorithm! At present, there is nothing better, can only be space for time, but with the further increase in bandwidth (app too many, mobile internet era, the era of IoT, this is inevitable, before your home only people online, now your home fan, microwave oven also want to surf the internet ...), there will always be a unit storage efficiency is not enough time, So no matter how big the space can not change the time ...
In fact, take the OC-768 link, for example, a TCP RTT needs roughly 0.25 seconds, so it must be at least buffered OC-768 bandwidth *0.25 data, that is, 10G of data, 1 seconds to buffer 10G of data, even the DDR4 is very laborious ... Besides the large-scale caching mechanism, the use of DDR is not appropriate ... This is a challenge to storage technology. Explosion!

What about next? Core network bandwidth must grow rapidly!