The International Conference on ns-3 (ICNS3), formerly known as Workshop on ns-3 (WNS3), will be held on August 19-21, 2025 at the Ritsumeikan University, Osaka Ibaraki Campus and co-hosted by Tokushima University, Japan. The objective of the conference is to gather ns-3 users and developers, together with networking simulation practitioners and users, and developers of other network simulation tools, to discuss the ns-3 simulator and related activities.

ICNS3 invites authors to submit original high quality papers presenting different aspects of developing and using ns-3. In such papers, reproducibility and methodology will be a key reviewing criteria, as explained below.

Papers on the validation and verification of ns-3 models or simulation campaigns are especially encouraged and may be grouped into a validation session.

Topics of interest include, but are not limited to, the following:

- new models, devices, protocols, and applications for ns-3
- using ns-3 in modern networking research
- comparison with other network simulators and emulators
- speed and scalability issues for ns-3
- multiprocessor and distributed simulation with ns-3, including the use of GPUs
- validation of ns-3 models
- credibility and reproducibility issues for ns-3 simulations
- user experience issues of ns-3
- frameworks for the definition and automation of ns-3 simulations
- post-processing, visualization, and statistical analysis tools for ns-3
- models ported from other simulators to ns-3
- using real code for simulation with ns-3 and using ns-3 code in network applications
- integration of ns-3 with testbeds, emulators, and other simulators or tools
- using ns-3 API from programming languages other than C++ or Python
- porting ns-3 to unsupported platforms
- network emulation with ns-3
- using ns-3 in education and teaching