Nsnam:About

From Nsnam

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Ns is a discrete event simulator targeted at networking research. Ns provides substantial support for simulation of TCP, routing, and multicast protocols over wired and wireless (local and satellite) networks. Namis a Tcl/TK based animation tool for viewing network simulation traces and real world packet traces. It supports topology layout, packet level animation, and various data inspection tools.

ns-2 is the second major iteration of a discrete-event network simulation platform programmed in C++ and Object Tcl (OTcl). ns-2 was first released in 1996, and derives from earlier work on the REAL and ns-1 simulators. ns-2 is a major architectural change from ns-1-- the simulator became entirely based on the blend of OTcl and C++.

Contents 1 Funding 2 Contributors

Funding

ns-2 and nam-1 have been funded by the following projects:

• DARPA VINT (Virtual InterNetwork Testbed) was a collaboration between USC/ISI, Xerox PARC, Lawrence Berkeley National Laboratory, and UC Berkeley (1997-2000).
• DARPA SAMAN (Simulation Augmented by Measurement and Analysis for Networks) USC/ISI (2000-2004).
• NSF CONSER (Collaborative Simulation for Education and Research) USC/ISI (2000-2004)

Contributors

The below lists contributors to the main code distribution; there is also a substantial list of third-party Contributed Code.

Arnaud Legout (Eurecom)

PLM

Elan Amir (UCB)

RTP; ns architecture

Hari Balakrishnan (UCB, Daedalus)

LANs and wireless networks; TCP over asymmetric networks, integrated TCP congestion control and loss recovery (tcp-int) across concurrent connections.

Sandeep Bajaj (PARC)

priority dropping and effect on application utility; interaction of multiple service priorities and application adaptivity; using multicast to support consistency protocols in web caching

Lee Breslau (PARC, VINT)

priority dropping and effect on application utility; interaction of multiple service priorities and application adaptivity; using multicast to support consistency protocols in web caching

Lars Eggert (USC/ISI, LSAM)

TCP Control Block Sharing across multiple concurrent connections

Deborah Estrin (USC/ISI, VINT, Routing Arbiter)

Reliable multicast; scalable protocol design issues

Kevin Fall (LBL, VINT)

Router Mechanisms; emulation and ns architecture; documentation editor

Sally Floyd (LBL, VINT)

Router mechanisms; ECN.

Marc Greis (U. Bonn)

Introductory tutorial.

Ramesh Govindan (USC/ISI, Routing Arbiter)

exploring other useful design points in the SRM parameter/timer management space, eg, when you havevery large updates with looser repair time requirements

Padma Haldar (USC/ISI, VINT)

Hierarchical routing.

Mark Handley (USC/ISI, VINT)

nam; visualisation

Ahmed Helmy (USC/ISI, VINT)

Systematic Testing of Multi-Party and Multicast Routing Protocol Robustness

Tom Henderson (UCB, Daedalus)

API, TCP, satellite networks

John Heidemann (USC/ISI, VINT, LSAM)

TCP Control Block Sharing across multiple concurrent connections, Rate-based pacing for TCP; ns memory usage analysis

Polly Huang (USC/ISI, VINT)

large-scale web traffic simulations; simulation abstraction techniques; ns memory usage analysis

Chalermek Intanagonwiwat (USC/ISI, SCADDS)

Wireless sensor network simulations; directed diffusion; flooding; omnicient multicast; energy consumption

Satish Kumar (USC/ISI, VINT)

Multicast Routing

Steven McCanne (UCB, VINT, MASH)

ns Architecture; emulation; RLM

Giao Nguyen (UCB, Daedalus)

LANs and wireless networks; TCP over asymmetric networks

Venkat Padmanabhan (UCB, Daedalus)

LANs and wireless networks; TCP over asymmetric networks (tcp-asym); TCP fast start (tcp-fs); Integrated congestion control and loss recovery for TCP

Yuri Pryadkin (USC/ISI, VINT)

Multicast, Wired LANs, Scheduling

Reza Rejaie (USC/ISI, VINT)

congestion control for real time data streams

Nader Salehi

Bidirectional PIM; 32-bit addressing

Puneet Sharma (USC/ISI, VINT)

Scalable Session Messages in SRM: Distribution of Session Messages in SRM using a self-configured hierarchy

Scott Shenker (PARC, VINT)

Integrated Services

Teck-Lee Tung (UCB)

Windows 95 port of ns; reliable multicast experiments

Kannan Varadhan (USC/ISI, VINT)

documentation editor

Vikran Visweswariah (USC/ISI, LSAM)

Rate-based pacing for TCP: when restarting an idle TCP connection, pace packets to avoid bursting or slow-start delay

Haobo Yu (USC/ISI, VINT)

exploring other useful design points in the SRM parameter/timer management space, eg, when you havevery large updates with looser repair time requirements