New Release! – NetSim v13.1

NetSim is the industry’s leading network simulation software for protocol modeling and simulation, network R&D, and defense applications. It is an end-to-end, full-stack, packet-level network simulator and emulator, providing network engineers with a technology development environment for protocol modeling, network R&D, and military communications.

The Dec release of NetSim (Ver 13.1) rolls out with exciting new features focused on enhanced User Interface, improvements in Wi-Fi, 5G, and so on.

What’s new in UI?

  • Your work has been completely redesigned.
  • Multiple folder levels are now available for organizing your saved projects.
  • Import of experiment files and workspaces redesigned for better collaboration between multiple users.
  • Home screen: Sharper fonts. New display of licensed and unlicensed components.
  • Experiments and Template examples: the search bar is now available. Short descriptions and scenario images were added for easy understanding.
  • Single click switches between workspaces.
  • One-click compare code between workspaces.


  • Optional installation of third-party tools in the custom mode for a smaller install footprint.
  • Third-party tools are now downloaded online and therefore a significantly reduced set-up size.

Wi-Fi 802.11 improvements

  • 11 ac now supports aggregation of up to 1024 packets.
  • Microsecond to nanosecond round off for 802.11n and 802.11ac transmission time calculations.

Bugs resolved:

  • Packets from multiple applications transmitted to different nodes were not aggregated on a per-node basis.
  • Incorrect power calculations in virtual interfaces in EDCA.

5G improvements

  • UE is out of coverage.
  • Beamforming array gain.

Video model enhancements

  • New video codes: H.261, H.263, MPEG1 and MPEG2.
  • Buffered video (BV1 through BV6) per IEEE 802.11-14/0571r12 standard.

New voice models

  • CELP and MELP.
  • Propagation models can now be customized by the user.

TCP improvements

  • NetSim now runs a single TCP RTO Timer for the entire TCP connection. In prior releases, each segment has its own RTO timer


  • From v13.1 onwards NetSim will no longer work on x86 (32 bit) processors; only x64 (64 bit) processors are supported.
  • 0 exported workspaces (*.netsim_wsp) cannot be imported into v13.1. Users should zip the v13.0 workspace folder and then use the “folder” import option in v13.1.
  • Map background is available as an “experimental” feature.


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