I am conducting research on next-generation mobile infrastructure and need a digital twin that mirrors an entire 5G/6G network system, end to end. The focus is strictly on network architecture and design—how every layer, interface, and node behaves under varied traffic loads, spectrum allocations, and topology changes. What I need you to build • A virtual replica of the full network stack, from core to RAN, that can run repeatable experiments. • Parameterised modules for radio units, backhaul, edge, and core cloud functions so I can swap architectures quickly. • Instrumentation to log KPIs such as latency, throughput, energy usage, and signalling overhead. • A concise technical report explaining modelling assumptions, key findings, and how to extend the twin for future 6G features. Tools & environment Feel free to use platforms like ns-3, OMNeT++, MATLAB, or a Python-based framework—as long as the model remains transparent and editable. Containerised deployment (e.g., Docker) is preferred so I can reproduce your results on my lab machines. Acceptance criteria 1. I can vary at least three architecture parameters (e.g., DU-CU splits, slicing configurations, routing strategies) and see reflected metrics. 2. The simulation runs without errors on a standard Linux workstation. 3. Documentation is clear enough for another researcher to replicate the study. If you’ve previously modelled full-stack mobile networks or have strong telecom simulation experience, let me know in your proposal along with sample outputs or GitHub references.