What network architecture is used in the 5G core network

The 5G access network (AN) has a wireless network architecture and a fixed network architecture.

Wireless side: Mobile phones or group customers access the radio access network through the base station, and the access network side can be solved through RTN, IPRAN or PTN solutions, and the signal is transmitted to the BSC RNC. Signals are transmitted to the core network, where the NEs inside the core network are carried through the IP bearer network.

On the fixed network side, home customers and inbound customers are connected through the access network, which is mainly GPON, including ONT, ODN, and OLT. After the signal comes out of the access network, it enters the metropolitan area network, which can be divided into the access layer, aggregation layer and core layer.

BRAS is the entrance to the metro network, and its main functions are authentication, authentication, and accounting. After the signal comes out of the metropolitan area network, it reaches the backbone network, and at the backbone network, it can be divided into the access layer and the core layer.

The main advantage of 5G networks is that the data transfer rate is much higher than that of previous cellular networks, up to 10Gbits, which is faster than current wired internet and 100 times faster than previous 4G LTE cellular networks. Another advantage is the lower network latency (faster response time) of less than 1 millisecond, compared to 30-70 milliseconds for 4G.

Due to faster data transfers, 5G networks will not only serve mobile phones, but will also be general home and office network providers, competing with cable network providers. Previous cellular networks provided low-data-rate Internet access for mobile phones, but a cell phone tower could not economically provide enough bandwidth as a general Internet provider for home computers.

Introduction to 5G wireless architecture and interfaces.

There are two 5G networking architectures, namely NSA and Shenxian Curved SA.

NSA: Non-standalone architecture, which means that 5G must rely on the 4G network under this architecture.

to deploy. 5G terminals and core networks.

The protocol stack of 4G is adopted.

The architecture is realized, and the 4G core network can support NSA and realize 5G base stations as long as it is simply upgraded.

Access. NSA terminals need to support simultaneous access to 4G base stations and 5G base stations (called dual connections), and in this architecture, 5G base stations mainly play their high bandwidth characteristics to improve the transmission capacity of user data. The NSA architecture can be used to quickly build 5G networks.

Low construction costs.

SA: The standalone architecture is boring, which means that 5G standalone networks do not rely on 4G networks. In this architecture, the terminal does not need to be connected to the 4G base station, and all signaling and data are completed by the 5G base station.

At this time, a new 5G core network must be built, and the 5G core network introduces many new technical features (such as service-oriented architecture, etc.), generally using virtualization technology.

Deployed in data centers, the construction cost is high.

The SA architecture introduces many new features, the most important of which is slicing (which means that multiple independent virtual networks are built on a single network to meet different business needs). The SA network is the evolution direction of the NSA network.

At present, the vast majority of 5G networks that have been built in the world are NSA, and only a small number of 5G networks are SA. China's three operators have built the world's largest and most advanced 5G network using the SA architecture, which is something to be proud of.

As the era of 5G mobile networks approaches, the global industry and academic community are accelerating their research on 5G network architecture and launching the first commercial version of 5G as soon as possible. As early as 2016, 3GPP announced two network architectures for 5G: standalone, that is, the access network only includes new air interface or evolved e-utra; Non-standalone networking, the new air interface and evolved e-utra coexist in the access network.

In June 2018, the second version of 5G NR R15 was completed, and the standardization of the R16 version was completed, which greatly enhanced the industry's confidence in 5G and had a significant impact on the subsequent promotion of 5G standards and industrial development.

What are the nets? Is there any structure that Harajuku Castle is different from? There are definitely different** area connections.