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In this paper, a methodology is presented and employed for simulating theInternet of Things (IoT). The requirement for scalability, due to the possiblyhuge amount of involved sensors and devices, and the heterogeneous scenariosthat might occur, impose resorting to sophisticated modeling and simulationtechniques. In particular, multi-level simulation is regarded as a mainframework that allows simulating large-scale IoT environments while keepinghigh levels of detail, when it is needed. We consider a use case based on thedeployment of smart services in decentralized territories. A two levelsimulator is employed, which is based on a coarse agent-based, adaptiveparallel and distributed simulation approach to model the general life ofsimulated entities. However, when needed a finer grained simulator (based onOMNeT++) is triggered on a restricted portion of the simulated area, whichallows considering all issues concerned with wireless communications. Based onthis use case, it is confirmed that the ad-hoc wireless networking technologiesdo represent a principle tool to deploy smart services over decentralizedcountrysides. Moreover, the performance evaluation confirms the viability ofutilizing multi-level simulation for simulating large scale IoT environments.

Multi-level Simulation of Internet of Things on Smart Territories