Table of Contents

• 1.   Introduction
• 1.1 News and Highlights
• 1.2 Contributions and Collaborations
• 1.3 Statistics


• 2.   ns-3 Development
• 2.1 Release Schedule
• 2.2 Technical Progress
• 2.3 Actions and Open Issues


• 3.   ns-2 Maintenance
• 3.1 Release Schedule
• 3.2 Technical Progress
• 3.3 Actions and Open Issues

1.   Introduction

This monthly report summarizes the ns-3 project, a collaborative project funded under the following grants:

• NSF CNS-0551686 (University of Washington);   PIs: Tom Henderson and Sumit Roy
• NSF CNS-0551378 (Georgia Institute of Technology);   PI: George Riley
• NSF CNS-0551706 (International Computer Science Institute);  PI: Sally Floyd

1.1 News and Highlights

• The project made a regular monthly development release of ns-3 on October 15. This release included a number of new features, including OLSR dynamic routing, a timer class, additional mobility models (random waypoint, random 2D walk), and a mobility visualization tool.

1.2 Contributions and Collaborations

• We regularly collaborate with the Planete research group at INRIA Sophia Antipolis and are trying to set up a more formal collaboration. Mathieu Lacage is the lead developer.
• Gustavo Carneiro contributed dynamic routing (OLSR) software in October, is maintaining the waf build system, and is contributing to overall maintenance and development of the simulator.

1.3 Statistics

• There were ~10900 downloads of ns-2 and ns-allinone packages from Sourceforge in October.
• There were 265 posts to the ns-users mailing list and 86 posts to the ns-developers mailing list in the past month.
• There are 30 open bugs and 12 patches on the ns-2 tracker
• There are roughly 20 open bugs/issues on the ns-3 tracker. There are additionally several code proposals being reviewed on the ns-3 wiki.

2.   ns-3 Development

2.1 Release Schedule

We plan the following for the ns-3.0.8 release in November:

• Error models for simulating lost packets on simple links
• API change for passing packets (by smart pointer)

2.2 Technical Progress

Mathieu Lacage has started to solicit comments for his 802.11 repository. Raj Bhattacharjea is working on a TCP model. Craig Dowell has put considerable effort into developing an ns-3 tutorial.

2.3 Actions and Open Issues

The University of Washington will host a developers meeting in Seattle, Washington from November 26-30.

3.   ns-2 Maintenance

The project is maintaining ns-2, nam-1, otcl, and tclcl while ns-3 is being developed.

• ns-2
• nam-1
• otcl and tclcl

3.1 Release Schedule

This wiki page describes the release plans for ns-2: roadmap for ns-2 The next release is scheduled for January 2008.

3.2 Technical Progress

• David Wei posted a TCP-Linux module for review. This module extends the TCP implementation to simulate high-speed variants of TCP, and to have a more faithful representation of the Linux TCP stack. Also included in the module was a scheduler improvement for the default scheduler.
• Tom Henderson suggested a roadmap for organizing 802.11-related code contributions in this email message.

3.3 Actions and Open Issues

• ns-2 bugs are logged in a Sourceforge tracker.
• ns-2 patches (waiting for review) are logged in this patch tracker
• ns-2 tasks (TODO list) are logged in this task tracker
• nam-1 tasks (TODO list) are logged in this task tracker

The below are the major action items and open issues.

ns-2 validation problems

Owner: None.

Description: Certain validation tests have been failing on various platforms (Cygwin, Fedora Linux) while passing on FreeBSD for several release versions.

Status: Cygwin and 64-bit Linux are the main open issues right now. We recently segregated validation tests into "portable" and "non-portable" lists, and print a disclaimer during run-time that failure of some of the non-portable variants is not necessarily problematic.