Networking Reference
In-Depth Information
Chapter 2
Basic Concepts
Abstract The Web of Things (WoT) paradigm is based on the use of protocols and
standards widely accepted and already in use in the traditional Web, such as the
Hypertext Transfer Protocol (HTTP) and the Uniform Resource Identifier (URI), to
support information sharing and device interoperation. These standards combined
with other elements such as the Representational State Transfer (REST) architectural
pattern and the Resource-oriented architecture (ROA) allow sensed data, provided
by the sensing physical devices via a Wireless Sensor Networks (WSN), to be treated
as any other resource on the Web. Such physical devices are identified by URIs and
accessed via HTTP basic operations (HTTP verbs). This Chapter briefly presents the
main key concepts that support the WoT paradigm, such as wireless sensor networks,
REST and ROA. We also discuss about the requirements that a middleware for
IoT/WoT should meet and we give an overview of existing proposals for such a
Keywords Web of Things (WoT)
Wireless sensor networks (WSN)
transfer protocol (HTTP)
Uniform resource identifier (URI)
state transfer (REST) architecture
Resource-oriented architecture (ROA)
Middleware for IoT
2.1 Realizing the WoT Paradigm
According to Guinard et al. [ 9 ], the Web of Things (WoT) goes a step further in
relation to the Internet of Things (IoT) as it integrates smart things not only to
the Internet (the network), but also to the Web (application layer), allowing the
development of applications built upon a myriad of networked physical elements.
Section 2.1.1 discusses about the network infrastructure typically used in WoT to
interconnect devices and physical objects, the Wireless Sensor Networks (WSN).
Section 2.1.2 presents the application level elements that supports the development
of applications built upon various networked physicalobjects.
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