Message Dissemination Protocol For Vehicular Ad-Hoc Network Using Time Gap Following Distance (TGFD) Model
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Date
2017-08
Authors
Fadilah, Suzi Iryanti
Journal Title
Journal ISSN
Volume Title
Publisher
Universiti Sains Malaysia
Abstract
In conventional Vehicular Ad hoc Network (VANET), two of the most commonly used
safety messages are namely the PSM (Periodic Safety Message) and WSM (Warning Safety
Message). The PSM contains vehicle update status, which is sent periodically to neighboring
vehicles. Meanwhile, warning safety message is embedded in the WSM. This research investigates
and contributes to more efficient PSM and WSM schemes via the proposed safer distance
model. The first model is a Time Gap Safe Following Distance (TGFD) model that can be
used to easily identify endangered vehicles and their crash severity factor (CSF). By identifying
the endangered vehicles, PSM and WSM dissemination can be optimized while improving
safety. Secondly, an Adaptive TGFD-CSF Based for PSM is proposed to optimize the PSM
dissemination rate in order to improve the safety of different vehicle densities. The contextaware
protocol is able to adjust the dissemination rate based upon CSF of vehicle that interacts
with the given TGFD model. This is done through prioritizing vehicles that are most likely to
crash with others. The simulation results show that the proposed PSM protocol outperforms
existing protocols in terms of efficiency, scalability, and safety with 0.5 percent of probability
of collisions compared to 43.3 percent of probability collision in conventional PSM protocol.
Thirdly, this work contributes to the literature by proposing a TGFD Based Segmentation for
WSM which aims at efficient delivery of safety message using TGFD. In this model, the WSM
protocol are sent only to the first priority endangered vehicles segment. As a result, the proposed
WSM protocol is more efficient in preventing potential accidents as shown in simulation
results when compared to other existing WSM protocols with 9.7 percent of probability of collisions
compared to 17.4 percent and 32.7 percent probability of collision in Smart Broadcast
(SB) and Distributed Vehicular (DV) broadcast protocol. By incorporating the proposed TGFD
model and dissemination protocols into the Cooperative Collision Avoidance System (CCAS)
development, improvement in communication and safety performance can be observed.
Description
Keywords
Message dissemination protocol for , Vehicular ad-hoc network