Last ned (Gratis)

Abstrakt

Ubiquitous and IoT (Internet of Things) systems consist of many parts, are highly
distributed and need to be adaptive in a highly dynamic environment. The exploitation of
adaptation possibilities at different layers needs to be coordinated to get an optimal result.
However, it is difficult to test and evaluate such distributed systems with regard to their
adaptive behaviour. This paper presents the design and implementation of a hybrid
simulation based experimental facility for cross-layer adaptation of such adaptive systems.
It is based on adaptation logic that builds runtime adaptation models based on information
from the application, communication and hardware layers and uses the model for
coordinated adaptation of these layers. The simulation facility has been implemented based
on the MUSIC adaptation framework. Our work has been inspired by use cases from the
subsea sensor networks and ambient assisted living domains, and the simulation facility is
being applied to study the benefits of cross-layer adaptation in these domains. As
preliminary validation of the proposed approach we discuss initial experience from the
subsea sensor network use case. However, we believe that such simulation facility is
generally applicable for application domains exhibiting highly distributed systems in
heterogeneous and dynamically varying environments.

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