5G Core: From Monoliths to Cloud Native / From Diameter & GTP to HTTP2 & JSON

Detailed Table of Content:

Chapter 1: 5G from an altitude of 4000 m (1.5 – 2 h)

5G RAN technology: evolution rather than revolution
5G Core: Revolution!
The Future of RAN: Open RAN (background, architecture, protocols)
Which frequencies are deployed where on the planet
Network Evolution: From PLMN’s to private and campus networks
The famous 5G service triangle: eMBB, URLLC and eMTC
More Details on URLLC (from eMBB to V2X, AR, VR, mobile edge computing and network slicing)
5G: Stand-Alone vs Non-Stand-Alone (Analysis of options 2, 3, 3x, 4 and 7)
Migration to 5G from an operator‘s perspective (NSA, SA, Rel 15, 16 and 17)
International Roaming in 5G (w/ and w/o local breakout)
QoS in 5G SA (General, 5QI, Mapping 5QI to QoS parameters and services)

Chapter 2: 5G Core: Evolution from Rel. 15 – Rel 16 (3 - 4 h)

Going back to Rel 14: CUPS (PFCP, operation, Sxa, Sxb, PGW-C and U, procedural differences with CUPS (e.g. selection of PGW-U)
Definition and Operation of a Service-Based Architecture (SBA)
Understanding RESTful Communication
Hands-On: Invoking and tracing service based communication
The Network Functions w/ R15 and R16 in SBA (AMF, SMF, UPF, NRF, PCF, NEF, AUSF, UDM, SEPP,…)
Defining and understanding micro-services in the context of 5GC
Roaming Issues between 5GC-networks (SEPP, PRINS and OAuth2.0)

Chapter 3: Virtualization and Containerization (2.5 – 3.5 h)

HW-Virtualization (What it is?, HW-Virtualization in telecommunication, ETSI-reference model, from HW-virtualization and VM’s to OS-Virtualization and Containers...)
Live: Setup and observation of VM’s
Docker Images and Containers
Docker Environment (components, Docker hub, containerd, comparison with podman, ...)
Live: Building our own images and containers
Live: Playing with containers (Apache web server in a container, port mappings, traffic recording between containers with Wireshark, ...)
Container Orchestration: First look onto Kubernetes (K8s)
Live: Understanding networking between containers

Chapter 4: Cloud Native Networking (2.5 - 3.5 h)

Definition, philosophy and and principles of Cloud Native (according to CNCF, micro-services, DevOps culture, CI/CD, service mesh, types of clouds (public, private, hybrid))
Decomposing typical silos into micro-services (theory and practice, meaning of YAML-files, ...)
Example: Looking at the different Micro-services inside UDM and AMF…
Deep dive into Kubernetes Architecture (Cluster, master node, worker node, pods, kube-api server, kube-controller, kube scheduler, etcd, …)
Deep dive into Kubernetes Operation (mapping service-/cluster IP-addresses to Pod-IP addresses, load balancing in a K8s cluster, health checks, self-healing, …)
Deep dive into Kubernetes Networking (Communication between 2 containers in a single Pod, between two Pods in the same worker node, in different worker nodes)
Live: Operation of Kubernetes (Basics, scaling, health checks, ...)
Live: Bashing into running Kubernetes Pods and invoking real-life traffic

Chapter 5: Scenarios (Reference / Theory) (2.5 - 3.5 h)

Understanding HTTP/2 (stream based transmission, operation, head of line blocking, outlook to HTTP/3, frame types, scenarios)
Registration and TA-Update procedure (according to 23.502 (4.2.2.2.2) but immediate mapping to real-life messages in chapter 6)
UE Requested PDU Session Establishment (according to 23.502 (4.3.2.2.1) but immediate mapping to real-life messages in chapter 6)
5G Authentication using 5G-AKA according to 33.501 (6.1.3.2) (detailed analysis, depicting the differences to 4G (e.g. HXRES*, K(ausf)) but immediate mapping to real-life messages in chapter 6)
Xn- and N2- based Handover procedure (intra NR)
5GS to EPS handover using N26 interface
EPS to 5GS handover using N26 interface
Deregistration procedure

Chapter 6: Scenarios (Wireshark / Practice) (2.5 – 3.5 h)

Alternatively or in addition we may incorporate and analyze your own logfiles

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