What This Document Is
These are detailed teaching notes centered around the network simulator NS-2, used within an Advanced Computer Architecture course (CS 6030) at Western Michigan University. The notes provide a foundational understanding of discrete event simulation as applied to network modeling, and delve into the practical aspects of programming and utilizing NS-2 for research and experimentation. It bridges theoretical concepts with the specifics of implementing network protocols within a simulation environment. The material focuses on both the underlying principles of NS-2’s architecture and the syntax of the associated Tcl and OTcl scripting languages.
Why This Document Matters
This resource is invaluable for students enrolled in advanced networking or computer architecture courses where simulation is a key component. It’s particularly helpful for those seeking to build and analyze network models, test protocol designs, or conduct research involving network performance evaluation. Individuals preparing for projects or research involving network simulation will find this a strong starting point. It’s best used alongside hands-on practice with NS-2 and a solid understanding of networking fundamentals.
Common Limitations or Challenges
These notes are specifically tailored to the NS-2 simulation environment and do not cover alternative network simulators in detail. While the fundamentals of discrete event simulation are explained, a pre-existing understanding of probability and queuing theory will be beneficial. The notes focus on the *how* of using NS-2, but do not provide exhaustive coverage of advanced networking concepts themselves. It assumes a base level of programming knowledge.
What This Document Provides
* An overview of NS-2’s capabilities and its role in network research.
* A foundational introduction to the Tcl and OTcl scripting languages as used within NS-2.
* Explanations of core concepts related to discrete event simulation.
* Guidance on setting up basic network simulations, including event scheduling and network creation.
* Illustrative examples of how to create and connect network agents.
* Discussion of common simulation tasks like creating transport connections and generating network traffic.
* References to example simulation scenarios for further exploration.
