1 research outputs found
End-to-End Service Level Agreement Specification for IoT Applications
The Internet of Things (IoT) promises to help solve a wide range of issues
that relate to our wellbeing within application domains that include smart
cities, healthcare monitoring, and environmental monitoring. IoT is bringing
new wireless sensor use cases by taking advantage of the computing power and
flexibility provided by Edge and Cloud Computing. However, the software and
hardware resources used within such applications must perform correctly and
optimally. Especially in applications where a failure of resources can be
critical. Service Level Agreements (SLA) where the performance requirements of
such applications are defined, need to be specified in a standard way that
reflects the end-to-end nature of IoT application domains, accounting for the
Quality of Service (QoS) metrics within every layer including the Edge, Network
Gateways, and Cloud. In this paper, we propose a conceptual model that captures
the key entities of an SLA and their relationships, as a prior step for
end-to-end SLA specification and composition. Service level objective (SLO)
terms are also considered to express the QoS constraints. Moreover, we propose
a new SLA grammar which considers workflow activities and the multi-layered
nature of IoT applications. Accordingly, we develop a tool for SLA
specification and composition that can be used as a template to generate SLAs
in a machine-readable format. We demonstrate the effectiveness of the proposed
specification language through a literature survey that includes an SLA
language comparison analysis, and via reflecting the user satisfaction results
of a usability study