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System simulation is a way to stress test your IoT application

Use simulation to design and build a better IoT system, faster and easier.

by Dr. Jakob Engblom, Wind River Systems - Embedded Computing Designs, May. 19, 2015 – 

The Internet of Things (IoT) will have a major impact on the way business is conducted in the future. New business models will be made possible by capturing and analyzing sensor data in real-time. For many organizations, the number of data points necessary to provide, for example, a cost competitive usage-based industrial robot contract will be in the hundreds. For even a modest multi-national robot manufacturer turned service provider, the world-wide deployment of IoT sensors and systems will run into thousands of sensors, gateways and systems.

These massive "systems-of-systems" will present a major challenge for testers. Ensuring that the IoT application is ready for a reliable deployment will be crucial. The real challenge is how to live test a deployment of hundreds or thousands of geographically dispersed devices. Fitting them into a lab is not only physically impossible but it wouldn?t properly test the more variable elements of the system, such as wireless connectivity, environmental conditions and real-life use patterns. The only realistic alternative is to test the overall system by simulation.

Most IoT systems tend to follow a similar three-tiered approach, like that shown in Figure 1. Small groups of nodes connect to each other and then connect, via wireless gateways and networks, to cloud-based data storage and analytic servers. Typically the node devices will be sensors to measure temperature, electricity consumption, light sensors or control actuators, such as switches, pumps, and heating controls. The gateways or concentrators handle the connection to the outside world, and ensure security. The back-end server, which is often in the cloud, deals with the business and control aspects of the IoT system.


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