> HARQ loop in LTE is tight = 3 ms(3ms for ENB, 3ms for UE
Not sven sure how this is relevant. First of all the virtualization happens not on a global scale but quite local to whatever you can the base station in technical terms. Secondly there is no requirement in futuure standards to be as strict as LLE on that level. Lastly this is a few years out and obviously specialized hardware would be in place. It's kinda pointless to assume that this has to run on general purpose hardware.
Where does this idea come from that this virtualization has to happen on the other side of the world?