In all the excitement about 5G, it is easy to forget that the most intensive innovations of 2016-2020 will go on in ‘4.5G’ – in Release 13 and 14, of course, but more importantly in the way the carriers and their vendors reinvent their cellular networks with new approaches like virtualization and HetNet, in the desperate bid to keep up with capacity, coverage and efficiency demands. Nokia’s Bell Labs’ R&D unit published a report this week warning that the capacity of mobile and WiFi networks is not growing nearly quickly enough to satisfy the rise in that demand, especially when it comes to content and video. Of course, such a conclusion, coming from an equipment vendor, is predictable and self-serving,…