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1

Design and Analysis of An Improved AODV Protocol Based on Clustering Approach for Internet of Vehicles (AODV-CD)

Ebadinezhad Sahar

International Journal of Electronics and Telecommunications

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2021

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Vol. 67, No. 1

13--22

EN

The Internet of Vehicles (IoVs) has become a vital research area in order to enhance passenger and road safety, increasing traffic efficiency and enhanced reliable connectivity. In this regard, for monitoring and controlling the communication between IoVs, routing protocols are deployed. Frequent changes that occur in the topology often leads to major challenges in IoVs, such as dynamic topology changes, shortest routing paths and also scalability. One of the best solutions for such challenges is “clustering”. This study focuses on IoVs’ stability and to create an efficient routing protocol in dynamic environment. In this context, we proposed a novel algorithm called Cluster-based enhanced AODV for IoVs (AODV-CD) to achieve stable and efficient clustering for simplifying routing and ensuring quality of service (QoS). Our proposed protocol enhances the overall network throughput and delivery ratio, with less routing load and less delay compared to AODV. Thus, extensive simulations are carried out in SUMO and NS2 for evaluating the efficiency of the AODV-CD that is superior to the classic AODV and other recent modified AODV algorithms.

2

Automatic beams detection used for LiFi car-2-car communication

Spahiu Cosmin Stoica, Marian Abagiu, Stanescu Liana

Annals of Computer Science and Information Systems

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2020

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Vol. 21

431--434

EN

he car-2-car communication it is a must for the next generation of cars. Such a functionality will increase the road safety by enhancing drivers awareness about road conditions and eventual obstacles. It can be also used to inform the cars behind about risky situations in order to trigger early avoidance actions (e.g. breaking). The available technologies were analyzed in order to define the best solution that should be accepted by most car manufacturers. A consortium took the responsibility to define a standard in this domain. The current paper analyze the feasibility of using a system based on LiFi technology, from image processing point of view for automatic beams detection. The paper consider the solution of using the beams of the car are used as a sender of information and an onboard camera running a special software is used as a receiver. This solution has the advantage of using already available hardware with small adaption, and only integrate the software.

3

LDAOR - Location and Direction Aware Opportunistic Routing in Vehicular Ad hoc Networks

Barootkar M., Rahbar A. G., Sabaei M.

Journal of Telecommunications and Information Technology

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2016

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nr 1

68--83

EN

Routing in Vehicular Ad hoc Networks (VANETs) has found significant attention because of its unique features such as lack of energy constraints and high-speed vehicles applications. Besides, since these networks are highly dynamic, design process of routing algorithms suitable for an urban environment is extremely challenging. Appropriate algorithms could be opportunistic routing (OR) where traffic transmission is performed using the store-carry-forward mechanism. An efficient OR mechanism, called Location and Direction Aware Opportunistic Routing (LDAOR), is proposed in this paper. It is based on the best neighbor node selection by using vehicles positions, vehicles directions, and prioritization of messages from buffers, based on contact histories and positions of neighbor nodes to destination. In LDAOR, when multiple nodes make contact with a carrier node, the closest neighbor node to destination is selected as the best forwarder. However, when only one node makes contact with the carrier node, the message is delivered to it if it moves toward the destination. Using the ONE simulator, the obtained performance evaluation results show that the LDAOR operates better than conventional OR algorithms. The LDAOR not only increases delivery rate, but also reduces network overhead, traffic loss, and number of aborted messages.

4

Throughput and Reliability Analysis of Single-Hop Broadcasting Protocol in VANETs

Liu H. F., Li L. J., Ma B. H., Sun D. Y.

Przegląd Elektrotechniczny

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2013

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R. 89, nr 3b

242--245

EN

The throughput and reliability indexes of traffic information single-hop broadcasting protocol is related to contention windows valve and contending nodes in vehicular ad hoc networks. In this paper, a theoretical analytic model of single-hop broadcasting protocol is proposed to analysis the relationship between the throughput and the reliability, and to find suitable contention window value which can optimize the throughput and reliability of broadcasting protocol. The analysis results show that the optimization contention windows value (W*) could improve the throughput and ensure reliability of traffic information single-hop broadcasting.

PL

W artykule zaproponowano teoretyczny model protokołu komunikacji typu single-hop, który służyć ma do analizy relacji niezawodności przekazywania informacji (sieć VANET) oraz przepustowości łącza. Dodatkowo pomaga on w określeniu rozmiarów okna przesyłowego, w celu optymalizacji tych czynników. Przedstawiono wnioski z analizy.