What is the meaning of the increasingly popular 5G public network dedicated?

Si Gyeongmin

Dec 13, 2021

The scale of 5G toB application is inseparable from the support of an important solution, that is, a 5G private network.


As we all know, the Internet connected to our ordinary users' mobile phones and computers is called the public network, which is a "public place." The private network, on the other hand, is a network dedicated to a specific industry or enterprise, and is a "private place."


There are two main reasons for the existence of private networks. One is to prevent public network users from contacting sensitive data for security isolation considerations. Second, because industries or enterprises have higher requirements for QoS indicators such as network reliability and stability, public networks cannot meet them.


According to the definition of the 3GPP standard, the deployment mode of 5G private network is divided into independent deployment mode (SNPN) and public network integration mode (PNI-NPN). To put it simply, it means "building alone" and "sharing the public network."


Let me talk about the independent deployment mode first.


The independent deployment mode of the 5G private network is not essentially different from that of the 4G private network. In short, it means that the enterprise pays to build a separate network, uses the dedicated spectrum issued by the regulatory agency, or uses free spectrum (unlicensed spectrum).


The advantages of this model are complete isolation, complete independence, high reliability, and privacy, but the shortcomings are also obvious.


First, the cost is extremely high. In addition to the one-time network construction cost (CAPEX), the enterprise also has to bear the long-term, more expensive operation and maintenance cost (OPEX).


Secondly, the technology is very difficult, and the requirements for the capabilities of the enterprise are very high. Under normal circumstances, it is necessary to hire a professional communication technology team for on-site support.


Third, the network construction cycle is very long, and the launch of new services is slow. If a failure occurs, the resolution and recovery speed will be slow, which will affect the normal operation and production of the enterprise.


Fourth, there is a lack of standard agreements and insufficient industrial chain support. Private networks serve thousands of industries, and different industries have different requirements for networks. 3GPP is unable to formulate independent deployment standards for each industry, so it is easy to cause confusion or loss of standards, which in turn leads to product fragmentation and a sharp increase in workload. The industry chain is also unable to provide sufficient support.


Now let’s look at the public network.


In view of the above major shortcomings of the "independent deployment model", the "public network integration model" has begun to rise and become the first choice for enterprises to build 5G private networks.


"Public network integration mode" is also called "public network dedicated". As the name implies, it is to share the operators' 5G public network equipment and resources to realize dedicated services.


According to the degree of sharing with the public network, the "public network integration model" is divided into "partial sharing" and "end-to-end sharing".


Compared with the independent deployment of private networks, shared public networks have obvious cost and technical advantages.


In the network construction stage, enterprises do not need to purchase a complete set of 5G communication equipment, which can save a lot of money.


In the maintenance phase, enterprises can delegate related work to operators and use the professional capabilities of operators to carry out standardized operations and maintenance of the network. This method is more cost-effective, more efficient, and safer.


Using the "public network integration mode", enterprise private networks can directly apply the results of 3GPP protocol standards and mature industrial chains, avoiding fragmentation and reducing costs.


How to deal with the data security and business security issues that enterprise users are most concerned about?


Nowadays, many companies apply private networks to the production link, and have extremely high requirements for network stability and reliability, and cannot tolerate business interruption.


However, in extreme cases, the transmission between the public network and the campus private network may still fail. In this case, it is necessary to ensure that the services of the private network are not affected and can continue to work smoothly.


When the transmission between the private network and the public network is unexpectedly interrupted, the emergency CP immediately performs emergency and seamless takeover to ensure the inertial operation of steady-state services, the normal access of new services, and the normal processing of handover services. In other words, it has ensured that "interrupted business continues."


When the connection between the campus private network and the public network is restored, the business management function will seamlessly migrate back to the central network and return to a normal working state.


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