Network Simulator

UnetSim

A fast, flexible simulator for developing subsea communication protocols without getting wet.

Terms of Use

Copyright © 2024, Acoustic Research Laboratory, National University of Singapore, and Subnero Pte Ltd. All rights reserved.

The UnetStack community edition software may be freely used for academic teaching and research purposes only.

The software may NOT be used for any commercial activity, such as (but not limited to):

  • Commercial deployment of underwater networks.
  • Commercial demonstrations.
  • Commercial research.
  • Consulting work performed by academic students, faculty or research staff.
  • Training of commercial company employees.

This software is provided by the copyright holders and contributors “as is” and any express or implied warranties, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose are disclaimed. In no event shall the copyright holder or contributors be liable for any direct, indirect, incidental, special, exemplary, or consequential damages (including, but not limited to, procurement of substitute goods or services; loss of use, data, or profits; or business interruption) however caused and on any theory of liability, whether in contract, strict liability, or tort (including negligence or otherwise) arising in any way out of the use of this software, even if advised of the possibility of such damage.

For commercial licensing, please contact: [email protected]

Prerequisites

* Unet audio is currently not supported on the Windows platform

** Only required for Unet audio

Design Your Underwater Network

The Unet Simulator runs the same software stack used on our modems, providing full control across physical, MAC, network, transport and application layers.

It lets users design, test and validate underwater communication and networking solutions on a laptop, then deploy them at sea with zero code changes.

Unetstack

Key Capabilities

Everything you need to validate your protocols before hitting the water.

Large-Scale Simulation

Simulate networks with many nodes, including mobile platforms and autonomous vehicles.

Real-Time Mode

Run interactive simulations for debugging agents and protocols step-by-step.

Discrete-Event Mode

Execute fast Monte Carlo evaluations to gather statistical performance data.

Unified API

Uses the exact same programming model (Groovy/Java/Python) as real UnetStack hardware.

Use Cases

UnetSim allows you to rapidly design and validate networking and MAC-layer protocols in a fully controlled virtual environment.

Defense

Simulating Network Behavior Using UnetSim

UnetSim lets you run both discrete-event and real-time simulations to model multiple subsea nodes—static or mobile—so you can design, develop, and evaluate your network protocols before moving to hardware testing.

Streamlined Workflow

From idea to ocean in three steps.

01

Prototype

Develop your protocol agents in Java or Groovy directly in the simulator.

02

Validate

Run real-time or discrete event simulations to prove robustness and performance metrics.

03

Deploy

Copy the exact same code to your modems. No cross-compilation needed.

Relevant Resources

Unet Handbook
Simulating underwater networks

Describes how to simulate underwater networks, including discrete-event or real-time simulations, configurable modem and channel models, and scalable networks with many nodes — using UnetSim.
Blog Article
Simulating motion in Unet Simulator

Explains how to simulate node mobility in UnetSim — using built-in dynamics or custom motion models — to test underwater network behavior under realistic motion conditions.