5G: What changes have been planned to do at core network side as part 5G technology ?

Question

I was going through deployment options 4A and 7, in which LTE eNodeB interacts with NGCN for control plane and user plane.
I am thinking the scenarios that when an operator would require particular option 7 in which eNodeB control and user plane both ends interface towards NGCN ? If this is the case then S1-AP and NG-AP both protocols will have to implement at next generation core network.
Is my understanding of option 7 is correct ?

Answer 1

Few companies have already started working on 5G requirement and development. There are number of things that can be improved in the existing LTE network. There are various use cases where existing LTE network can't meet the expectation. For example:
Mission Critical communication, vehicle to vehicle communication.
As far as your concern towards LTE core network, various changes are been proposed and companies have started working on it.
Control plane and user plane dis-aggregation. Run time flow changes using SDN software. Network slicing to create virtual network on demand. More inclined towards "service a model" approach so that TTM (Time to market) can be reduced to launch a new service.
Use of commodity hardware rather using vendor locked hardware.
Functionality wise there is no change in MME, SGW, PGW and other nodes of LTE network. 5G making things more and more better.