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 and development schedule

ns-3.23 is planned for Wednesday May 6 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).

An initial release candidate is planned for Saturday May 1.

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.

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 (6.3)
• Ubuntu 14.04, 14.10, and 15.04
• Fedora 21
• Debian 7 (gcc-4.9)
• FreeBSD 10 (clang 3)
• CentOS 6.6 (gcc-4.4.7)

Testing repos

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

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 this release cycle.

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

Pending 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 release cycle, so check back for progress/status.

Statistics

Enhancements to data collection framework are planned to enable more flexible configuration of time series, time avearge, and asynchronous event plotting (Li Li, Felipe Perrone, Tom Henderson).

• Status: Development repo is found at http://code.nsnam.org/safe/ns-3.22-dcf; code review planned for week of April 20.

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

TCP

• Some of the TCP variants for satellite networks (Natale Patriciello) may be merged
  • https://codereview.appspot.com/122010043/

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

• Several patches contributed by Matt: http://mailman.isi.edu/pipermail/ns-developers/2015-March/012622.html

• Several bug fixes in work:
  • TCP performances drop when Advertised Window is larger than Sender Buffer size
  • TCP window update can shrink the Left Edge of the window which is a bug

WiFi

• Sebastien Deronne and Ghada Badawy are working on these bugs:
  • Wrong timeout value for 802.11n
  • A-MPDU reception should check for successful preamble
  • A-MPDU using RTS/CTS behaves wrongly when MaxSsrc is reached

Sebastien is working on two-level (hybrid) aggregation.

Other WiFi development (may slip past this release) is listed on the current development page.

Mesh

• Changes to mesh module to make it standards compliant: http://mailman.isi.edu/pipermail/ns-developers/2015-March/012616.html

DSR

• LEAR extensions https://codereview.appspot.com/96130043/

Status: Tomasz is working on addressing the review comments (no update recently)

Epidemic Routing

• https://codereview.appspot.com/13831049/

Status: Still undergoing code review revisions.

UAN WOSS

• https://codereview.appspot.com/14677043/

Satellite models

• http://mailman.isi.edu/pipermail/ns-developers/2014-June/012071.html

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

Software maintenance issues

• Time arithmetic consistency
• Wstrict-overflow and gcc-4.9 (Tom Henderson and Peter Barnes)
• Remove unnecessary dependency on Application module in other modules (1941) Tommaso Pecorella
  • Cleanup of remaining modules unnecessarily dependent on applications (aodv, mesh, olsr, lte)

Status: No change on the above lately.