Orchestration and Control in Software-Defined 5G Networks: Research Challenges

Table 2

Trade-offs in the hierarchy of the M&O of slices.

Full isolation in M&O of each slice	Pro-fused (global/local) M&O
(i) Dependability (avoiding error and failure propagation between slices)	(i) Better utilization of physical resources
(ii) Easier to guarantee QoS	(ii) Better utilization of available spectrum
(iii) Easier SLA handling (fewer parties and more control of resources)	(iii) Increased flexibility in dealing with unforeseen changes of traffic and configuration (failures)
(iv) Independence between and autonomy of tenants	(iv) More flexibility in adopting new slices/service types
(v) Simpler and less failure prone M&O
(vi) Limited cross tenant orchestration