Internet of Things: A Challenge for Software Engineering

International audienceThe Internet of Things (IoT) has become a reality with the emergence of Smart Cities, populated with large amounts of smart objects which are used to deliver a range of citizen services (e.g., security, well being, etc.) The IoT paradigm relies on the pervasive presence of smart objects or "things", which raises a number of new challenges in the software engineering domain

Leveraging Declarations over the Lifecycle of Large-Scale Sensor Applications

International audienceMasses of sensors and actuators are being deployed in our daily environments to provide innovative services for such spaces as parking lots, buildings, and railway networks. Yet, to realize the full potentials of these sensor network infrastructures, services need to be developed. Service development raises a number of challenges due to existing approaches that are often low level and network/hardware-centric. This paper proposes a high-level approach to the development of large-scale orchestrating applications. It revolves around a declaration language that allows to express the sensor-network dimensions of an application (sensor discovery, delivery models, actuation process). These declarations define the behavior of an application with respect to the sensor network infrastructure. We demonstrate the key relevance of these declarations at every stage of an application lifecycle, from design to runtime. In doing so, declarations allow to match the sensor-network behavior of an application to the target infrastructure. Our approach summarizes and puts in perspective our development of industrial case studies and our experience in using a commercially-operated sensor infrastructure

An Evaluation of the DiaSuite Toolset by Professional Developers: Learning Cost and Usability

International audienceThis paper evaluates a design-driven, tool-based approach, named DiaSuite, dedicated to developing applications involving sensors and actuators. Specifically, we evaluate the usability and the learning cost of DiaSuite as a first step to assess the potential for transferring this technology to the industrial practice of this domain. We assess the cost of learning DiaSuite by involving four professional programmers in a usability study involving a software engineering task. This experiment brings preliminary evidence that the DiaSuite technology can be used effectively by professional developers after only half a day of training. We then present qualitative data about the usage and usability of DiaSuite, collected from developers, via questionnaires and interviews. Finally, we discuss lessons learned from this work

Internet of Things: From Small-to Large-Scale Orchestration

International audienceThe domain of Internet of Things (IoT) is rapidly expanding beyond research, and becoming a major industrial market with such stakeholders as major manufacturers of chips and connected entities (i.e., things), and fast-growing operators of wide-area networks. Importantly, this emerging domain is driven by applications that leverage an IoT infrastructure to provide users with innovative, high-value services. IoT infrastructures range from small scale (e.g., homes and personal health) to large scale (e.g., cities and transportation systems). In this paper, we argue that there is a continuum between orchestrating connected entities in the small and in the large. We propose a unified approach to application development, which covers this spectrum. To do so, we examine the requirements for orchestrating connected entities and address them with domain-specific design concepts. We then show how to map these design concepts into dedicated programming patterns and runtime mechanisms. Our work revolves around domain-specific concepts and notations, integrated into a tool-based design methodology and dedicated to develop IoT applications. We have applied our work across a spectrum of infrastructure sizes, ranging from an automated pilot in avionics, to an assisted living platform for the home of seniors, to a parking management system in a smart city

An Evaluation of the DiaSuite Toolset by Professional Developers

International audienceWe evaluate the learning cost and usability of the DiaSuite tool-based approach dedicated to developing sensor/actuator applications