I have no开发者_StackOverflow中文版 idea about this concept,and the manuals for simulators consider that the reader is familiar with the concept, so it is not a big help. Where should a man start from?
My advice would be to pick an discrete-event based network simulator (open source) and start looking at the tutorials and the examples bundled with it.
There's actually two really good simulators being used in academia right now, which are well respected and are quite easy to learn: ns-3 and OMNet++]2. For both exist models for 802.11 and other wireless networking technologies, like WiMax or 802.15.4 (Zigbee). In addition, both network simulators have great tutorials to start with!
You will certainly ask now: Which one should I use? Actually, that is really dependent on your personal taste: If you like to have a niche graphical interface, go for OMNeT++. I've used both in the past, but our research group now sticks mostly to ns-3 for its rather good TCP/IP stack.
Finally, I'd like to point out that there's many great books about simulation and modeling out there.
I would suggest trying OPNET Modeler. OPNET Modeler is used by hundreds of commercial enterprises, including network equipment vendors and defense organizations, communication research bodies, and thousands of universities worldwide.
OPNET Modeler has a robust simulation platform, an extremely fast discrete event simulation engine, an intuitive graphical user interface, and 150+ high-fidelity protocol models available out-of-the-box (802.11 WLAN, MANET, TDMA, WiMAX, ZigBee, LTE, etc.). OPNET provides open access to the model source code enabling users to quickly modify existing protocols while the simulation framework lets you easily design new protocols from scratch.
Over the 25 years of existence of the tool, OPNET has added numerous example scenarios to help you get familiar with the software. OPNET also provides free classroom training and has many self-paced, online training videos. You may even be eligible to receive free OPNET Modeler licenses for qualifying academic research. Check out: OPNET University Program.
In the interest of full disclosure, I must state that I am a Product Manager working at OPNET.
Good luck and let me know if you have any questions.
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