Message Dissemination Protocol For Vehicular Ad-Hoc Network Using Time Gap Following Distance (TGFD) Model

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dc.contributor.authorFadilah, Suzi Iryanti
dc.date.accessioned2018-01-16T07:38:19Z
dc.date.available2018-01-16T07:38:19Z
dc.date.issued2017-08
dc.description.abstractIn 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.en_US
dc.identifier.urihttp://hdl.handle.net/123456789/5403
dc.language.isoenen_US
dc.publisherUniversiti Sains Malaysiaen_US
dc.subjectMessage dissemination protocol foren_US
dc.subjectVehicular ad-hoc networken_US
dc.titleMessage Dissemination Protocol For Vehicular Ad-Hoc Network Using Time Gap Following Distance (TGFD) Modelen_US
dc.typeThesisen_US
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