Background: In the recent years, due to proliferation of the internet and smart
computing there has been progress in the areas of energy, manufacturing, oil and gas, smart grid
and other industrial applications. The progress in these areas is due to the advances in the emerging
areas such as Big data, cloud computing, fog computing and wireless networks. The advancement
in these areas has paved the way for new industrial evolution, Industry 4.0 or smart factory or
Industrial Internet of Things (IIoT). IIoT is made up of a collection of devices, with each device
being able to monitor, collect, exchange, analyze and take decisions intelligently based on the
environment through proper communication channels. IIoT consists of smart solutions in the fields
of electricity (smart-grid), home automation (smart-home), supply-chains (smart-automation) and
agriculture (smart-agriculture). The interconnection among the different smart components of IIoT
is a key requirement for IIoT systems. We revised all the patents relating to industry 4.0 and its
application in Internet of Services (IoS).
Methods: In this paper, a novel three-layered architecture is proposed to handle the heterogeneity
of components of IIoT, thus providing a way for the digital transformation of IIoT systems.
Results: The paper also provides an overview of underlying components, principles,
communication standards and enabling technologies for IIoT or smart factory. There is no patent
information used in the paper for discussing the framework.
Conclusion: Recent technologies such as cloud computing, fog computing, and big data are the
key enablers for IIoT systems and are transforming the way in which the industrial systems work