The vehicular ad hoc networks (VANETs) can be exploited in many safety applications like emergency, firefighting, etc. to multicast safety information quickly to several destinations. Thus, the safety applications need to design multicasting schemes to select the optimal path with minimum delay. On another side, Software Defined Network (SDN) is a modern concept that presents availability, reliability, and flexibility and enhances vehicular network architecture. Moreover, the Fog Computing (FC) framework is appropriate to perform the multicast routing process in VANET because it supports the continuous mobility of vehicles and location awareness. The parked vehicles can be used as fixed FC nodes to transfer data with high link stability. This paper aims to produce a Delay efficient Multicasting approach depending on Parked vehicles, FC and SDN for VANET (DMPFS). In DMPFS, the bandwidth constraint is taken into consideration in discovering the optimal multicast route. Moreover, a scheduling approach based on the priority of application type is proposed to classify and schedule the multicast demands. The partitioning technique is exploited to reduce the overhead and time complexity of DMPFS. The simulation results illustrate that DMPFS is superior than adaptive Distributed Tree-based Multicast Routing protocol (DTMR) and Micro Artificial Bee Colony based Multicasting (MABC). In terms of the packet delivery ratio (PDR), DMPFS results in about 9% and 14% improvement compared with DTMR and MABC, respectively. Average end to end delay with DMPFS is approximately 33% and 41% less than DTMR and MABC, respectively. In terms of the communication overhead, DMPFS leads to about 22% and 28% reduction compared with DTMR and MABC, respectively.

车载自组织网络 (VANET) 可用于许多安全应用，如紧急情况、消防等，以将安全信息快速多播到多个目的地。因此，安全应用需要设计多播方案以选择具有最小延迟的最佳路径。另一方面，软件定义网络 (SDN) 是一种现代概念，它提供可用性、可靠性和灵活性，并增强了车辆网络架构。此外，雾计算（FC）框架适合在 VANET 中执行多播路由过程，因为它支持车辆的连续移动性和位置感知。停放的车辆可以作为固定的FC节点传输数据，链路稳定性高。本文旨在产生一个延迟有效的M多播方法取决于停放的车辆、FC和S用于 VANET (DMPFS) 的 DN。在 DMPFS 中，在发现最佳组播路由时会考虑带宽约束。此外，提出了一种基于应用类型优先级的调度方法，对组播需求进行分类和调度。利用分区技术来降低 DMPFS 的开销和时间复杂度。仿真结果表明，DMPFS优于自适应分布式基于树的多播路由协议（DTMR）和基于微人工蜂群的多播（MABC）。在数据包传递率 (PDR) 方面，与 DTMR 和 MABC 相比，DMPFS 分别提高了约 9% 和 14%。DMPFS 的平均端到端延迟分别比 DTMR 和 MABC 少大约 33% 和 41%。在通信开销方面，