ns-3

ns-3.47 released

2026-02-16T19:00:00-05:00

ns-3.47 has been released, due to contributions from twenty-eight authors. This release adds new traffic generators from the IEEE 802.11ax evaluation methodology, support for TCP Forward Acknowledgement, and improvements to 3GPP propagation models for outdoor-to-indoor penetration losses. The ns-3 3GPP channel model now supports a spatial-consistency update procedure consistent with TR 38.901. The global routing framework has been extended to support IPv6, and a “PrintRoute” functionality similar to traceroute has been added. LR-WPAN devices are now supported in the Pyviz visualizer, and a TCP BBR Python example program was added.

ns-allinone-3.46.1 released

2025-12-17T09:00:00-05:00

A new ns-allinone release, following the October ns-3.46.1 release has been published. The ns-allinone release series bundles compatble extension modules with the mainline ns-3 release. This release includes fifteen compatible contributed modules, including five newly added modules and one (wimax) that was migrated from the ns-3 mainline. Contributed modules are separately maintained ns-3 extensions that are advertised in the ns-3 App Store, and we plan to bundle those modules that are compatible with the release in an allinone release approximately one month after the mainline release. The list of included modules:

ai (v1.45.2): ns3-ai interface for machine learning
aqm-eval-suite (1.0.0): AQM Evaluation Suite
defiance (v1.45.3): DEFIANCE Multi-Agent Reinforcement Learning
first-order-buildings-aware-path-loss (1.0): First Order Buildings Aware Propagation Loss Model
lorawan (v0.3.5): LoRaWAN
netsimulyzer (v1.0.16): NetSimulyzer module
nr (v4.1.1): 5G LENA NR module
oran (v1.3): ORAN ns-3 module
quantum (v1.0.2): Quantum module
sip (1.2): Session Initiation Protocol
uart-net-device (v1.1): UART NetDevice
vr-app (v2.2.1): VR traffic model
wban (v1.0): Wireless Body Area Network
wimax (1.0): WimaxNetDevice and related models
zero-trust-iot (v1.0.1): Zero Trust module for IoT

ns-3.46 released

2025-10-01T20:00:00-04:00

The ns-3.46 release has been published. This release adds a new Zigbee groupcast and APS layer support, a new wraparound interference model for spectrum channels, and a new Wi-Fi simulation helper for static associations, and contains maintenance and small feature updates for the other modules, as listed in the release notes. This release is due to seventeen contributors, including six new contributors.

ns-allinone-3.45 released

2025-08-17T10:00:00-04:00

A new ns-allinone-3.45 release, following the June ns-3.45 release has been published. The ns-allinone release series now bundles compatble extension modules with the mainline ns-3 release. Several contributed modules are maintained in the ns-3 App Store, and we plan to bundle those modules that are compatible with the release in an allinone release approximately one month after the mainline release. Users may now choose between these two different source archives. The list of contributed modules, which now includes the nr, lorawan, and several others, will be updated from release to release.

ns-3.45 released

2025-06-01T20:00:00-04:00

The ns-3.45 release has been published. This release adds a new DHCPv6 model, 320 MHz channel support for Wi-Fi, improvements to the EMLSR model, and contains maintenance and small feature updates for the other modules, as listed in the release notes. This release is due to thirteen contributors, including five new contributors.

ns-3 GSoC selections announced

2025-05-08T07:00:00-04:00

Five students will work with the ns-3 project for the 2025 Google Summer of Code!

The selected students, projects, and project mentors are:

David Lin, Upgrade the AQM Evaluation Suite for ns-3, mentored by Mohit Tahiliani and Tom Henderson
Aditya Ruhela, ICMP socket and generate/handle ICMP messages (host/net unreachable), mentored by Tommaso Pecorella and Alberto Gallegos Ramonet
Boh Jie Qi, 6LoWPAN Neighbor Discovery Protocol, mentored by Tommaso Pecorella and Adnan Rashid
Shashwat Patni, IPv6 Global Routing, mentored by Tommaso Pecorella and Manoj Kumar Rana
Thiago Miyazaki, NTN Helper and a LEO example for 5G NR, mentored by Gabriel Ferreira and Amir Ashtari Gargari

ns-3.44 released

2025-03-09T20:00:00-04:00

The ns-3.44 release has been published. This release adds a new zigbee module and contains maintenance and small feature updates for the other modules, as listed in the release notes. This release is due to twenty-two contributors, including eight new contributors.

ns-3 GSoC program concludes

2024-10-15T07:00:00-04:00

Our three 2024 Google Summer of Code students have successfully completed their programs and posted final reports, linked from our wiki Kavya Bhat, mentored by Tommaso Pecorella, Alberto Gallegos Ramonet, and Manoj Kumar Rana, implemented a model for DHCP for IPv6 networks (DHCPv6). The addition of this code is helpful for ns-3 because many modern networks use DHCPv6 SLAAC both at enterprises and IoT home networks (e.g., Thread stack). This model allows ns-3 users to test practical scenarios, particularly where DHCPv6 might fail to either acquire an address or detect an address collision.

Hyerin Kim, mentored by mentored by Katerina Koutlia, Amir Ashtari, Biljana Bojovic, and Gabriel Ferreira, completed a project on extending the 5G NR module (5G-LENA) with AI/ML capabilities, through the integration with the ns3-gym and the implementation of RL-based MAC schedulers. This project was motivated by the optimization possibilities for the NR QoS schedulers to increase the total user throughput and to improve user fairness.

Joao Albuquerque, mentored by Biljana Bojovic, Amir Ashtari, and Gabriel Ferreira, focused on extending the NR module (5G-LENA) to support legacy non-spatial channel models, adding support for the NYUSIM channel model, and creating a new channel helper to facilitate channel setups. The channel helper also checks for valid calibrated configurations, preventing users from using unsupported configurations unless explicitly configured.

Thanks to all of the students, mentors, and other ns-3 reviewers who helped make this a successful summer.

ns-3.43 released

2024-10-09T20:00:00-04:00

The ns-3.43 release has been published. This release is mainly a maintenance release but contains many small improvements and bug fixes listed in the release notes. This release is due to twenty-eight contributors, including twelve new contributors.

ns-3 project governance posted

2024-09-28T07:00:00-04:00

A governance structure for the open source project has been posted under the About/Governance section of the website. This includes project bylaws, a code of conduct, a newly-organized Steering Council (chaired by Eduardo Almeida), and a list of other project roles and policies.