The TCP/IP stack plays an important role in terms of data transmission, traffic control and address assignment in the Internet of Vehicles (IoV), which has seen phenomenal growth in recent years. However, with the increasing technical requirements and daily demand in IoV, the drawbacks of traditional TCP/IP protocols, e.g., weak scalability in large networks, low efficiency in the dense environment and unreliable addressing in high mobility circumstance, become non-trivial especially in vehicular environments. Fortunately, the emerging Named Data Networking (NDN) technology provides a good choice to address the above issues in vehicular environments. Specifically, the introduced content store module in NDN which caches the sent/received contents, can greatly improve the networking performance by suppressing redundancy as well as enriching diversity. With aforementioned motivations, we thoroughly studied previous works on Vehicular Named Data Networking (VNDN) with emphasis on content caching, and then demonstrate the feasibility and necessity for employing NDN in vehicular environments with the help of content caching. Subsequently, we further strengthened the importance of cache selection and replacement strategies in VNDN framework, which is positioned to meet the challenges of data transmission efficiency and resource consumption by leveraging in-network vehicular caching. After that, we engaged in an in-depth survey on the existing cache selection and replacement schemes in VNDN, with their applicability compared. Next, further challenges during caching design were elaborately analyzed considering the specific characteristics of VNDN. Finally, we highlighted the potential research directions which may shine lights on the promising efforts to improve the performance of VNDN content caching.

中文翻译：

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车载命名数据网络中的缓存：架构、方案和未来方向

TCP/IP 协议栈在车联网 (IoV) 中的数据传输、流量控制和地址分配方面发挥着重要作用，车联网 (IoV) 近年来出现了惊人的增长。然而，随着车联网技术要求和日常需求的不断增加，传统 TCP/IP 协议的缺点，例如在大型网络中的可扩展性弱，在密集环境中效率低下以及在高移动性环境中寻址不可靠，变得不那么简单，尤其是在车辆环境。幸运的是，新兴的命名数据网络 (NDN) 技术为解决车载环境中的上述问题提供了一个很好的选择。具体来说，在 NDN 中引入的内容存储模块缓存发送/接收的内容，可以通过抑制冗余和丰富多样性来大大提高网络性能。基于上述动机，我们深入研究了以前在车辆命名数据网络 (VNDN) 上的工作，重点是内容缓存，然后在内容缓存的帮助下证明了在车辆环境中使用 NDN 的可行性和必要性。随后，我们进一步加强了 VNDN 框架中缓存选择和替换策略的重要性，该框架旨在通过利用网络车载缓存来应对数据传输效率和资源消耗的挑战。之后，我们对VNDN中现有的缓存选择和替换方案进行了深入调查，并比较了它们的适用性。下一个，考虑到 VNDN 的具体特性，详细分析了缓存设计过程中的进一步挑战。最后，我们强调了潜在的研究方向，这些方向可能会照亮提高 VNDN 内容缓存性能的有希望的努力。