Architecture of the Core Network
Christopher Cox · 2020
This is the first of two chapters on the 5G system architecture, which focusses specifically on the core network. It begins by reviewing the architecture of the evolved packet core and laying out the architecture of the 5G core network, including the network functions, reference points and service-based interfaces. It then addresses the various forms of identification and addressing that the core network uses, and the associated state diagrams. The chapter concludes with a discussion of the signalling protocols in the 5G core network, including an in-depth account of the principles of HTTP/2 and its use on the service-based interfaces of 5G.