Ns-3.23

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This page summarizes the release planning for ns-3.23 (tentatively May 6 2015). The ns-3 release process is listed here and here.

The release manager is Tom Henderson. Please contact him if you would like to participate in any way in preparing the ns-3.23 release.

  • If you are interested in testing a particular feature that is planned for ns-3.23, see the section on this page for testing repos.
  • If you are interested in helping with a code review of a specific feature that you'd like to see in ns-3.23, please leave your comments on the code review pertaining to the feature of interest.
  • If you are interested to see that a specific bug be fixed, please email ns-developers mailing list, or the release manager. You will probably be asked to help with creating a patch or testing an existing patch for that bug, if so.

Release goals

1) continue the transition to a more modular build system. While a change from the Waf build system is not planned for ns-3.23, one goal is to start to allow modules outside the core of ns-3 to be maintained in separate places, and integrated using the 'bake' tool (rather than merge everything into ns-3-dev).

2) finally try to implement Object Start/Stop

3) make a major dent in the bug tracker. Can we clean out most issues on our actively maintained modules, including closing out feature requests for which we do not have anyone working on them?

4) Add new features as they become ready. In particular, finish inclusion of previous summer project code, including SOCIS 2013 and 2014 code (Bundle Protocol, TCP satellite extensions), Google Summer of Code (MLDv2, AQM queues FqCoDel and SfqCoDel), and 2014 mentored projects (Mobility Service Interface, and Python 3 support).

Release and development schedule

ns-3.23 is planned for Wednesday May 8 2015 (the goal is to release this before the Workshop on ns-3 the following week). ns-3 makes roughly three releases per year (Dec/Jan, Apr/May, and Aug/Sept timeframes).

This means that we ought to get most new features and major changes into the simulator by early April.

More detailed scheduling is found below.

Packaging

ns-3.23 will be packaged as a source tarball as before: ns-allinone-3.23.tar.bz2.

The tarball will contain:

  • Latest version of pybindgen
  • Latest version of netanim
  • ns-3.23
  • bake

where bake is used to fetch optional ns-3 components, including DCE.

A patch from ns-3.22 to ns-3.23 will also be posted.

Whether ns-3.23 is prepared in other packaging (e.g. Debian) would require a volunteer to prepare this.

Whether ns-3.23 will be distributed also as a Docker container would require a volunteer to prepare this.

Release platforms

We usually try to keep pace with the latest popular versions of Linux, OS X, and FreeBSD. For the ns-3.23 release, we plan to support the following systems and compilers:

  • OS X 10.10 Yosemite with latest Xcode
  • Ubuntu 14.04 and 15.04
  • Fedora 21
  • Debian 7 (gcc-4.9)
  • FreeBSD 10 (clang 3)
  • CentOS 6.6 (gcc-4.4.7)
  • others TBD

Testing repos

Some repositories, based on a recent copy of ns-3-dev, are available for testing specific features.

TV transmitter spectrum model

The code from Ben Cizdziel at review issue https://codereview.appspot.com/148810043/ is almost ready to merge. 

hg clone http://code.nsnam.org/repositories/tomh/ns-3-dev-tv-transmitter

Mobility Service Interface

Tiago Cerqueria has posted some code that uses Google Maps and Directions API to fetch waypoints for the ns-3 waypoint mobility model, corresponding to real-world routes provided by the service. There is a testing repository available for this code (the patchset in https://codereview.appspot.com/176430044/ is too large to download from Rietveld). To test, one must obtain an API key from Google, as described in the code review issue. One must also have installed GeographicLib, xerces-cpp, libcurl, and libdl. 

hg clone http://code.nsnam.org/ns-3-dev
cd ns-3-dev/src
hg clone http://code.nsnam.org/tomh/mobility-service-interface
cd mobility-service-interface
mkdir conf
# copy your API key to this conf directory as described here https://codereview.appspot.com/176430044/
cd ../../
./waf configure ...

Python 3 support

Modifications to support Python 3 are available as part of a 2014 summer project, and are planned for inclusion in February. 

hg clone https://bitbucket.org/ssanturkar/ns-3-python-port/src

New features

Developers are working or planning to work on the following new features for ns-3.23. Note: there is no guarantee that the features will be finished by the end of the year, so check back for progress/status.

Changes to the simulation core

Others to be determined

Statistics

  • Add a basic statistics collector, and convert some existing stats helpers in LTE and WiFi to use the statistics framework (Tom Henderson and Li Li)

Energy Enhancements (Cristiano Tapparello)

Cristiano plans several additions:

  • New models for energy sources, converters, predictors, and sensor models (code to be posted soon)
  • LithiumIonEnergySource helper
  • RVBatteryModel bug fixes

Internet module

A number of changes relate to supporting AQM and ECN. This code may end up in the internet module or a new 'internet-queues' module.

Status: Tom Henderson is working on progressing the idea to add a TC sublayer, socialized by Natale Patriciello on the ns-developers list here: http://mailman.isi.edu/pipermail/ns-developers/2014-November/012398.html

TCP

  • RttEstimator improvements (Natale Patriciello)
    • Resolve bug 1412 RttEstimator to network module

The following were mentioned in the past but don't seem to be actively worked at the moment:

WiFi

  • Matias Richart is preparing new power and rate control algorithms

Vehicular networks

Delay-tolerant networking

Status: Currently interoperability testing of ns-3 LTP with ltplib.

DSR

Status: Tomasz is working on addressing the review comments

Epidemic Routing

Status: Still undergoing code review revisions.

UAN WOSS

Satellite models

Status: There hasn't been any recent activity so this will likely slip another release

Simple wireless

Software maintenance issues

Documentation improvements

others to be determined

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