CU/DU MEC
cache
CU/DU
FIGURE 3: End-to-end network slicing relies on optimal domain-specific and cross-domain performance from the device
to external servers.
state of synergy and eventual fusion. As an essential part
of the 5G architecture, the performance of the underlying
fiber infrastructure will directly affect the experience
of 5G. In other words, any fiber issues will be interpreted
as 5G issues. Fiber will be a key enabler for 5G end-to-end
network slicing too.
End-to-End Network Slicing
End-to-end network slicing is arguably the defining feature
of 5G. Network domain-specific (e.g., core) slicing is not
a new concept. What is new is the ability to split network
resources into virtual network slices with distinct characteristics
and service level agreement (SLA) requirements and
to provide users/devices with the relevant service and true
end-to-end network performance.
It should be evident from Figure 3 that the transport
layer has a crucial role to play in network slicing. This is
where optical fiber would come to the fore.
10 I ICT TODAY
High-Level Opportunities
Figure 4 depicts the opportunities that 5G brings
to network operators. 5G promises:
• Optimal efficiency in the use of network resources.
• Improved agility in introducing new services so
as to follow the over-the-top (OTT) and digital
service provider (DSP) paradigms.
• An enhanced and more reliable mobile
user experience.
• Increased relevance to a number of consumer
and enterprise verticals as an enabler of exciting
and mission-critical use cases.
• A solid foundation for business transformation.
Of particular significance is the adoption of new
business models, such as network as a service (NaaS).
Based on end-to-end network slicing, 5G can facilitate
the provision of distinct slices for different service
FIGURE 4: High-level opportunities for 5G network operators.
Independent
slices
Core
cloud
Edge
cloud
vCore
vCore
CU/DU vCore
V2X server
vIMS
UHD video slice
Critical IoT slice
Transport network
Radio
Telephony slice
internet
Optimal resource
efficiency
OTT/DSP
service agility
Better user
experience
Increased,
diverse relevance
New business
models