Adrian Lita

Overview

NTS (Network Topology Simulator) is an open-source project within the O-RAN Software Community used to simulate large-scale O-RAN network topologies.

What I Did

• worked within a 2-people team
• leadership was transfered in between us on based on feature
• together we developed everything

Features and purpose

• Written primarly in C, very efficient and highly scalable through Docker
• It emulates O-RAN network elements (e.g., O-CU, O-DU, O-RU)
• Depending on the models, it can emulate <strong>any</strong> topology needed
• It can easily simulate up to 100.000 nodes, making it an ideal tool for stress testing
• It exposes realistic management and control interfaces (NETCONF, REST, VES, etc.)
• It is primarily used to test, validate, and scale components without requiring real hardware
• End-to-end testing of O-RAN management workflows
• Performance and scalability validation of SMO, OAM, and orchestration systems
• Supports dynamic alarm triggering, randomized model population

Python version

A Python version of the NTS was sepparately developed to allow fast-deployment (no need to recreate Docker images).

Technologies Used

• C / C++
• Python
• NETCONF / Yang
• libyang, sysrepo, libnetconf, netopeer
• JSON, YAML
• Docker / Docker Compose
• bash, regex, netem
• etc...

Links