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Issue No. 03 - July-Sept. (2013 vol. 6)
ISSN: 1939-1374
pp: 414-428
Chiara Sandionigi , Politecnico di Milano, Milano
Danilo Ardagna , Politecnico di Milano, Milano
Gianpaolo Cugola , Politecnico di Milano, Milano
Carlo Ghezzi , Politecnico di Milano, Milano
This paper describes a novel model for the service selection problem of workflow-based applications in the context of self-managing situated computing. In such systems, the execution environment includes different types of devices, from remote servers to personal notebooks, smartphones, and wireless sensors, which build an infrastructure that can dynamically change both its physical and logical architecture at runtime. We assume that workflows are defined abstractly; i.e., they invoke abstract services whose concrete counterparts can be selected dynamically. We also assume that concrete service implementations may possibly migrate on the nodes of the infrastructure. The selection problem we address is framed as an optimization problem of the quality of service (QoS), which evaluates at runtime the optimal binding to concrete services as well as the tradeoff between the remote execution of software fragments and their dynamic deployment on local nodes of the computational environment. The final deployment takes into account quality of service constraints, the capabilities of the physical devices involved, including their performance and energy consumption, and the characteristics of the networking links connecting them.
Concrete, Abstracts, Quality of service, Optimization, Electrocardiography, Sensors, Software, quality of services, Optimization of services systems, optimization of services composition

C. Ghezzi, G. Cugola, D. Ardagna and C. Sandionigi, "Optimizing Service Selection and Allocation in Situational Computing Applications," in IEEE Transactions on Services Computing, vol. 6, no. , pp. 414-428, 2013.
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