Services that aim to make the current transportation system more secure, sustainable, and efficient constitute the Traffic Management Systems (TMS). Vehicular Ad hoc Networks (VANETs) exert a strong influence for TMS applications, due to TMS services require data, communication, and processing for operation. Besides, VANET allows direct communication between vehicles, and data are exchanged and processed between them. Several TMS services require disseminated information among decision-making vehicles. However, such dissemination is a challenging task, due to the specific characteristics of VANETs, such as short-range communication and high node mobility, resulting in several variations in their topology. In this article, we introduce an extensive analysis of our proposed data dissemination protocol based on complex networks’ metrics for urban VANET scenarios, called DDRX. Each vehicle must build a subgraph to identify the relay node to continue the dissemination process. Based on the local graph, it is possible to select the relay nodes based on complex networks’ metrics. Simulation results show that DDRX offers high efficiency in terms of coverage, number of transmitted packets, delay, and packet collisions compared to well-known data dissemination protocols. Also, DDRX provides significant improvements to a TMS that needs efficient data dissemination.

中文翻译：

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基于复杂网络指标的城市车载网络高效数据分发协议

旨在使当前运输系统更加安全，可持续和高效的服务构成了交通管理系统（TMS）。由于TMS服务需要数据，通信和操作处理，因此车载自组织网络（VANET）对TMS应用产生了很大的影响。此外，VANET允许车辆之间的直接通信，并在车辆之间交换和处理数据。几种TMS服务需要在决策工具之间传播信息。但是，由于VANET的特殊特性（例如短距离通信和高节点移动性），这种分发是一项艰巨的任务，从而导致其拓扑结构发生多种变化。在这篇文章中，我们针对基于城市VANET场景的复杂网络指标（称为DDRX），对我们提出的数据分发协议进行了广泛的分析。每辆车必须建立一个子图以标识中继节点以继续分发过程。基于本地图，可以根据复杂网络的指标选择中继节点。仿真结果表明，与众所周知的数据分发协议相比，DDRX在覆盖范围，传输的数据包数量，延迟和数据包冲突方面具有很高的效率。此外，DDRX对需要有效数据分发的TMS进行了重大改进。可以根据复杂网络的指标选择中继节点。仿真结果表明，与众所周知的数据分发协议相比，DDRX在覆盖范围，传输的数据包数量，延迟和数据包冲突方面具有很高的效率。此外，DDRX对需要有效数据分发的TMS进行了重大改进。可以根据复杂网络的指标选择中继节点。仿真结果表明，与众所周知的数据分发协议相比，DDRX在覆盖范围，传输的数据包数量，延迟和数据包冲突方面具有很高的效率。此外，DDRX对需要有效数据分发的TMS进行了重大改进。