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A Clustered VNF Chaining Scheme with Delay Guarantees in NFV-Based VANETs

机译：一种聚集的VNF链接方案，延迟保证基于NFV的VAGETS

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摘要

Recently, there are many new automotive products equipped with intelligent onboard systems (IOSs) to obtain varieties of convenient services. However, the closed architecture of IOSs makes it difficult and costly to upgrade the IOS for supporting new services, where network function virtualization (NFV) is introduced to tackle this problem by virtualizing the functions of IOS as software applications. Furthermore, the openness of IOS supports reuse of virtualized network functions (VNFs), which builds service chains orderly, among vehicles. Thus, it is imperative to set up the service chains applicable. In this paper, we provide a clustered VNF chaining scheme which computes the optimal cluster size to minimize the average service time (AST) of the network. The scheme is applied to both circle scenario and real traffic lane scenario, which is demonstrated in the numerical experiments. The simulation results also show the proposed scheme reduces 68% and 36% AST compared to RD-wop and PD- woc, respectively.
机译：最近，有许多新的汽车产品配备了智能车载系统（IOSS），以获得方便的服务品种。然而，IOSS的封闭式架构使得升级IOS难以且昂贵的是，用于支持新服务，其中引入网络功能虚拟化（NFV）通过虚拟化IOS作为软件应用程序的功能来解决此问题。此外，iOS的开放性支持重用虚拟化网络功能（VNF），在车辆中有序地建立服务链。因此，必须设置适用的服务链。在本文中，我们提供了一种聚类的VNF链接方案，该方案计算最佳簇大小，以最小化网络的平均服务时间（AST）。该方案应用于圆形方案和实际交通车道场景，在数值实验中证明。仿真结果还显示了与RD-WOP和PD-WOC相比，所提出的方案减少了68 ％和36 ％AST。

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