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RESEARCH, ANALYSIS & TRENDS

• In the device-to-gateway model, or more This approach is an extension of the single device-
typically, the device-to-application-layer to-cloud communication model, which can lead to
gateway (ALG) model, the IoT device connects data silos where “IoT devices upload data only to a
through an ALG service as a conduit to reach a single application service provider’’. A back-end
cloud service. In simpler terms, this means that sharing architecture allows the data collected from
there is application software operating on a local single IoT device data streams to be aggregated
gateway device, which acts as an intermediary and analyzed and suggests a federated cloud
between the device and the cloud service and services approach, or cloud applications
provides security and other functionality such as programmer interfaces (APIs), to achieve
data or protocol translation. Several forms of this interoperability of smart device data hosted in the
model are found in consumer devices. In many cloud.
cases, the local gateway device is a smartphone
running an app to communicate with a device and By enabling the user to achieve better access to an IoT
relay data to a cloud service. The other form of this device and its data, the overall value of the device is
device-to-gateway model is the emergence of clearly amplified, however, these networked benefits
“hub” devices in home automation applications. come with trade-offs. Careful consideration needs to be
These are devices that serve as a local gateway paid to the incurred cost burdens placed on users to
between individual IoT devices and a cloud connect to cloud resources when considering an
service, but they can also bridge the architecture, especially in regions where user
interoperability gap between devices themselves. connectivity costs are high. ◊

• The back-end data-sharing model refers to a Source: Santosh Kulkarni & Prof. Sanjeev Kulkarni:
communication architecture that enables users to Communication Models in Internet of Things: A Survey,
export and analyze smart object data from a cloud IJSTE - International Journal of Science Technology &
service in combination with data from other Engineering | Volume 3 | Issue 11 | May 2017
sources. This architecture supports “the [user’s]
desire for granting access to the uploaded sensor
data to third parties”.

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