IEEE Consumer Electronics Magazine - September/October 2019 - 43

constrained network.5 A greedy-based channel
assignment algorithm enhances the network
capacity and strengths the device fairness.6 An
efficient smart city which addresses security,
safety, fraud, and unavailability is proposed.7 A
communication recovery is proposed using
emergency aerial networks.8 The privacy and
security defilement of user personal data issues
in Internet of Things (IoT) is addressed.9
The white Light-emitting diode (LED) has
been integrated with optical wireless communication systems.10 The safety issues of the product in IoT are described.11 An idea of extension
of cloud computing and its services for the IoT
consumers has been introduced in the paper by
Corcoran and Datta.12 This paper addresses the
multiplexing tactic which eradicates the interface in between terrestrial digital multimedia
broadcasting channel and Alert Channel.13
The transceiver is introduced for the long
range of communication in IoT environment.14
The D2D assisted transmission is developed for
improving the closeness-based emergency service by prioritizing elderly adults.15

PROPOSED LOCATION-BASED
SYSTEM

Figure 1. D2D system.

Manual trigger refers to the case that one of
the users sent a message requesting rescues.
Automatic trigger works in the case when one
of the users moves closer to an unsafe site. In
both cases, the location of the user needing
help is essential in providing fast-response rescue services. The status as safe or unsafe of a
place may vary with time. For example, after an
earthquake, a village can be isolated for emergency calls. Our proposed service can help in
this case as the village would already be flagged
in the list of unsafe areas with an emergency
situation.
Consider unsafe place B in some remote area,
for which providing cellular communication
services is not appealing. In this case, a simple
fixed relay can be used to support the safety service. The relay only needs the D2D supporting
feature. In the figure, as unsafe place B is in the
coverage of the relay, user 7 is served by the
safety service.

Working Principle of the Proposed Scheme
As shown in Figure 1, there are two BS, called
BS 1 and BS 2, covering a certain amount of
areas. Since users 1, 2, and 3 are in the coverage
range of BS 1, their locations are monitored by
the central controller. However, users 4, 5, and 6
are out-of-coverage area. Their locations are
monitored via D2D for the safety purposes. It
means user 4 is connected by user 2; user 5 and Roles of the Cluster in This Scheme
user 6 are connected by User 3. Users 2 and 3
From the above example, it is obvious that
play the roles of relays in this scenario. The the timely localization of the victims is very
unsafe places A and B are not covered
by any BS and the database of unsafe
map area is accessible by the central
controller, illustrated in Figures 2 and 3.
When users 5 and 6 are determined to
be close to unsafe place A, alerts are
sent to them along the route from the
central controller via BS 1 and User 3.
Emergency situation can be trigged by
the system either manually or automatiFigure 2. Working principle of the proposed system.
cally by this scheme.

September/October 2019

IEEE Consumer Electronics Magazine - September/October 2019

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