Regin Cabacas and In-Ho Ra
School of Computer, Information and Communication Engineering,
Kunsan National University, Gunsan, South Korea
ABSTRACT
Natural disasters often destroy and disrupt communication infrastructures that hinder the utilization of
disaster applications and services needed by emergency responders. During these circumstances an
implementation of a standalone communication system (SCS) that serves as an alternative communication
platform for vital disaster management activities is essential. In this study, we present a design and
implementation of an SCS realized using an inexpensive microcontroller platform. Specifically, the study
employed Raspberry Pi (RPi) devices as rapidly deployable relay nodes designed with a context-aware
routing mechanism. The routing mechanism decides the most efficient route to send messages or
disseminate information in the network by utilizing a context-aware factor (CF) calculated using several
context information such as delivery probability and link quality. Moreover, with the use of this context
information, the proposed scheme aims to reduce communication delay and overhead in the network
commonly caused by resource contention of users. The performance of the proposed SCS, was evaluated in
a small-area case-scenario deployment using a messaging application and web-based monitoring service.
Additionally, a simulation-based performance analysis of the proposed context-aware routing mechanism
applied to an urban area map was also conducted. Furthermore, in the simulation, the proposed scheme
was compared to the most commonly used Flooding and AODV schemes for SCS. Results show a high
delivery probability, faster delivery time (low latency) and reduced message overhead when using the
proposed approach compared with the other routing schemes.
KEYWORDS
Standalone communication systems, disaster communication systems, context-aware routing
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