Book Image

Mastering 5G Network Design, Implementation, and Operations

By : Shyam Varan Nath, Ananya Simlai, Oğuzhan Kara
5 (1)
Book Image

Mastering 5G Network Design, Implementation, and Operations

5 (1)
By: Shyam Varan Nath, Ananya Simlai, Oğuzhan Kara

Overview of this book

We are living in an era where ultra-fast internet speed is not a want, but a necessity. As applications continue to evolve, they demand a reliable network with low latency and high speed. With the widespread commercial adoption of driverless cars, robotic factory floors, and AR/VR-based immersive sporting events, speed and reliability are becoming more crucial than ever before. Fortunately, the power of 5G technology enables all this and much more. This book helps you understand the fundamental building blocks that enable 5G technology. You’ll explore the unique aspects that make 5G capable of meeting high-quality demands, including technologies that back 5G, enhancements in the air interface, and packet core, which come together to create a network with unparalleled performance. As you advance, you’ll discover how to design and implement both 5G macro and private networks, while also learning about the various design and deployment options available and which option is best suited for specific use cases. After that, you’ll check out the operational and maintenance aspects of such networks and how 5G works together with fixed wireline and satellite technologies. By the end of this book, you’ll understand the theoretical and practical aspects of 5G, enabling you to use it as a handbook to establish a 5G network.
Table of Contents (23 chapters)
1
Part 1:Introduction to 5G
Free Chapter
2
Chapter 1: Introduction to 5G
10
Part 2:5G Network Design, Deployment Models, and Advanced Use Cases

PDU session establishment with 4G/N26/IWF

3GPP has specified provisions for the UEs capable of supporting both 5G and 4G NAS to connect to the E-UTRAN and 5G core network. An SMF capable of the EPS interworking support would act as a PGW-C+SMF and would have the S5/S8 interface with SGW to receive the 4G session creation request.

Figure 7.7 – 4G interworking function

Figure 7.7 – 4G interworking function

All the other interfaces involved in a 4G session creation (for example, Gx, Gy, Gz, etc.) are replaced by the corresponding 5G core SBI interfaces (Npcf, Nudm, and Nchf). The SMF+PGW-C provides information over N4 to the UPF+PGW-U related to the handling of traffic over S5-U.

This option will be used typically by network operators when most of their network has a 5G core deployed. In this case, it makes sense to slowly retire the legacy of the 4G-based core and leverage the interworking function of the 5G core to cater to 4G devices.

In Figure 7.7, we see how interworking is...