The 5G Network Architecture

Network Architecture
The 5G network architecture may be described with three main layers, a service enablement, All‐IT
infrastructure, and hyper‐connected radio:
1) The service enablement layer understands both the service requirements and the underlying
system
capabilities. It can dynamically gather necessary system resources to create diverse services
on‐demand;
2) The All‐IT infrastructure is the layer that abstracts physical system resources into logical (virtualized)
system resources, and provides the abstracted system resources to the service enablement
layer. The All‐IT infrastructure is composed of commodity hardware and open software and
heavily leverages network function virtualization (NFV) and software defined networking (SDN)
technology, as detailed in Section 10.2;
3) Hyper‐connected radio is the layer composed of multiple radio access technologies, providing
radio connectivity satisfying bandwidth, latency and density requirements of 5G to the All‐IT
infrastructure layer.
A unified 5G network supports seamless operations across many different types of wired and wireless
networks. The unified access architecture allows sharing legacy optical‐fiber infrastructure with
both wireless and wireline services. Furthermore, gateway functionality for both wireless and wired
services can be merged into a single gateway at the network edge, enabling unified wireline and wireless
services across different access technologies. These new features help to quickly develop new
business opportunities, adapting to diverse market demands, such as the demand for near‐zero latency.

The Reference :

5G System Design
Architectural and Functional Considerations and Long Term Research