A Cloud-Native Based Access and Mobility Management Function Implementation in 5G Core

The fifth generation of mobile communication network core network adopts micro-service architecture, overturning the original core network architecture, making it easier for 5G networks to realize network slicing, supporting large planning and high-speed terminal access. Many studies have been constructed on 5G technologies, but it is difficult to validate these theories and algorithms in a real-world environment. Therefore, we aim to build the open-source end-to-end 5G mobile communication system platform. In this paper, we develop a cloud-native based implementation of Access and Mobility Management Function (AMF) under the OAI 5G Core project. We firstly review the design principles of cloud-native applications and its relationship with serviced 5G core network functions. And then, the designed application architecture for the cloud-native based AMF and detailed implementation of system procedures, e.g. initial registration procedure, are described. In the end, the AMF is tested in a real E2E 5G system for its functionalities. Also, it's deployed in a cloud environment, tested with simulated gNB/UEs., for its stability and concurrency capacity.