ns-3.31 was released on June 27, 2020. ns-3.31 includes the following new features:

  • Models for pathloss, chanel condition, fast fading, and antenna arrays based on 3GPP TR 38.901 model.
  • Matrix-based channel model base class to support antenna arrays
  • Random walk mobility model that does not allow nodes to enter buildings
  • A datacenter TCP (DCTCP) model
  • An option to enable IPv4 hash-based multicast duplicate packet detection (DPD) based on RFC 6621
  • LTE trace sources for uplink PSD and RBs
  • A new interface to SQLite
  • Support for the Cake set-associative hash to the FqCoDel queue disc
  • Support for ECN marking to CoDel and FqCoDel queue discs
  • A Wi-Fi Bianchi (saturation) example with a comparable MATLAB model
  • The idealized Wi-Fi rate control includes better support for different MIMO modes and channel widths
  • The CommandLine facility can now add the Usage message to the Doxygen for the program
  • A new approach to run example programs as regression tests

    • The release also includes numerous bug fixes and small improvements, listed in the RELEASE_NOTES.

    The ns-3.31 release download is available from this link.

    • A patch to upgrade from ns-3.30.1 to ns-3.31 can be found here
    • What has changed since ns-3.30? Consult the changes and RELEASE_NOTES pages for ns-3.30.

    The documentation is available in several formats from this link.

    • Errata containing late-breaking information about the release can be found here