The initial 5G network technology deployments will assume non-standalone
(NSA) in the mid broad bands, although the approach has been normalized
to supports operators to reuse the existing 4G Evolved Packet Core (EPC)
networks, providing software upgrade requirements for NSA maintenance.
The Standalone (SA) 5G network technology is estimated to succeed first
in low/mid broad bands, offering enormous coverage extensions and
exceeding interior penetration more than the high broad bands,
performing exceedingly well from both marketing and business ecosystem
while enabling the end-to-end (e2e) 5G Systems and 5G network Core to be
established . All the subsisting spectrum that consolidated on 4G
network technology will be migrated efficiently to 5G network technology
framework as time progresses, minimizing the prevalence of 4G as 5G
technology have encapsulated the same band. The spectrum migration and
combinations for both broad bands and technologies (4G and 5G) are
fundamental for the planned progression of the novel 5G network
technology. There exist several possibilities for encapsulation and
combinations of broad bands plus technological innovations for 4G and
5G.