Sensornet Checkpointing: Enabling Repeatability in Testbeds and Realism in Simulations
EWSN '09 Proceedings of the 6th European Conference on Wireless Sensor Networks
Experimental evaluation of simulation abstractions for wireless sensor network MAC protocols
EURASIP Journal on Wireless Communications and Networking - Special issue on simulators and experimental testbeds design and development for wireless networks
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We present an approach to improve simulation results by automatically mapping the network topology of real wireless networks into a simulation environment. We basically target two problem domains: First, simulations are often used with rather arbitrary configurations, i.e., the used settings may strongly deviate from realistic setups. Secondly, and as our key motivation, we aim to use the simulator to experiment with different algorithms and settings in parallel to an existing sensor network installation. That means that we want to exactly rebuild the real network in order to estimate the performance of our new settings before deploying them into the network. In our demo, we show that not only the physical environment influences the propagation of radio waves, but also the hardware. These changes are incorporated in realtime into our simulator. Even though the reasons for the strong variations are out of the scope, the consequences for the sensor network are significant.