In this study, the authors delve into the realm of Vehicular Adhoc networks (VANETs) and the importance of simulations in evaluating their applications. Real-world experiments are costly and challenging, leading to a reliance on simulations for testing VANETs. The research aims to assess simulators like SUMO, ns-3, and OMNeT++ concerning resource utilization, packet delivery, and computational time.
The study highlights the unique characteristics of VANETs compared to Mobile Ad hoc networks (MANETs), emphasizing the need for realistic simulation tools. Mobility simulations focus on replicating real-world vehicle movement patterns within virtual road boundaries. Network simulations consider data transmission behavior based on selected network scenarios, communication technology, and key parameters like transmit power and message size.
The authors conducted experiments comparing memory usage, computational time, and packet delivery ratio between ns-3 and OMNeT++. Memory usage analysis revealed that ns-3 outperformed OMNeT++ in terms of efficiency. Computational time results showed variations between the two simulators with increasing simulation duration. Packet delivery ratios were compared across different simulation times, indicating differences in performance between ns-3 and OMNeT++.
Furthermore, shortcomings of both simulators were identified during the study. Issues with routing protocols implementation in Veins framework for OMNeT++, version conflicts among frameworks, workspace corruption risks in OMNeT++, lack of visualization capabilities in ns-3 without debugging mode access were discussed. Additionally, challenges related to modifying simulations for vehicular applications were highlighted along with difficulties in analyzing node-level information efficiently.
Overall, the study provides valuable insights into the performance evaluation of VANET simulators ns-3 and OMNeT++, offering a comprehensive comparison based on various parameters.
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