As I started to understand the 5G core network architecture, I noticed that the Software Definition Network (SDN) and Network Function Virtualization (NFV) was mentioned twice as two emerging technologies. However, many articles ignore the important role played by SDN and NFV technology in 5G, and many technical blogs are also from a professional operator’s point of view to emphasize the time and cost savings brought about by the introduction of SDN and NFV to operators, which actually makes me very confused, Because I still do not understand why SDN and NFV technology can have such a great potential to fundamentally understand the importance of these two technologies for 5G. As beginners, it is difficult to fully understand the entire 5G core network technology system if it is not understood in its essence. So I do some inductive finishing here, hope to help beginners.

There are many disadvantages of digital fiber network: Its terminal equipment is limited, can only connect a few sensors, not support or support a small number of wireless network devices, mobility is limited; the network is difficult to expand, does not support multi-communication protocol coexistence, terminal expansion difficult, network upgrade reconfiguration is not easy. And the usual WiFi access point (AP) signal coverage range is 50 to 100 meters indoor, 100 to 150 meters outdoor.

Nowadays, consumers and enterprise cloud business are driving the development of data centers, whether it is relying on IT transformation of traditional enterprises, or Internet content providers (ICP), it needs a scalable data center architecture to meet the east-west traffic growth. According to Microsemi data show that the demand for flow for traditional operators is 25T, while for the Internet enterprise is 960T, about 40 times of the former.

The cost pressures and deployment difficulties of FTTH forced telecom operators to rethink the value of copper cables. As a result, the simultaneous deployment of fiber-optic and copper cable is the leading of future access network deployment, this has become the consensus of the industrial chain, and operators and equipment vendors will be the next task around the copper cable network technology innovation, how to better utilize the existing resources, how to better play copper cable waste heat is a real problem to be considered.