System-level testing of healthcare Internet of Things (IoT_ applications requires creating a test infrastructure with integrated medical devices and third-party applications. A significant challenge in creating such test infrastructure is that healthcare IoT applications evolve continuously with the addition of new medical devices from different vendors and new services offered by different third-party organizations following different architectures. Moreover, creating test infrastructure with a large number of different types of medical devices is time-consuming, financially expensive, and practically infeasible. Oslo City healthcare department faced these challenges while working with various healthcare IoT applications. This paper presents a real-world software architecture (HITA) to create a test infrastructure for healthcare IoT applications. We discuss the quality requirements achieved by HITA and the status of work products developing as a part of HITA. We also present our experiences and lessons learned from the architectural work related to HITA.

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