Dynamic Scaling
E2 provides hooks for NFs to report on their instantaneous load,
and the E2D detects overloads based on queues and processing
delays. When the E2D detects overload, it splits the overloaded
NF instance to lighten the load. This involves placing the new
instances, setting up new interconnection state, and considering
the affinity requirements of flows, so it is not to be done
lightly. Pictured above is the traffic load at an overloaded NF
instance and its corresponding new instance with migration
avoidance enabled (original NF splits at 2s).