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Optimal Content Prefetching in NDN Vehicle-to-Infrastructure Scenario

机译:NDN车对基础设施场景中的最佳内容预取

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摘要

Data replication and in-network storage are two basic principles of the Information Centric Networking (ICN) framework in which caches spread out in the network can be used to store the most popular contents. This work shows how one of the ICN architectures, the Named Data Networking (NDN), with content pre-fetching can maximize the probability that a user retrieves the desired content in a Vehicle-to-Infrastructure scenario. We give an ILP formulation of the problem of optimally distributing content in the network nodes while accounting for the available storage capacity and the available link capacity. The optimization framework is then leveraged to evaluate the impact on content retrievability of topology- and network-related parameters as the number and mobility models of moving users, the size of the content catalog and the location of the available caches. Moreover, we show how the proposed model can be modified to find the minimum storage occupancy to achieve a given content retrievability level. The results obtained from the optimization model are finally validated against a Name Data Networking architecture through simulations in ndnSIM.
机译:数据复制和网络内存储是信息中心网络(ICN)框架的两个基本原理,其中网络中分布的缓存可用于存储最受欢迎的内容。这项工作说明了具有内容预取功能的ICN架构之一,即命名数据网络(NDN)如何最大程度地提高用户在“车辆到基础设施”场景中检索所需内容的可能性。我们在考虑可用存储容量和可用链路容量的同时,给出了在网络节点中最佳分发内容的问题的ILP公式。然后利用优化框架来评估对拓扑和网络相关参数的内容可检索性的影响,这些参数包括移动用户的数量和移动性模型,内容目录的大小以及可用缓存的位置。此外,我们展示了如何修改建议的模型以找到最小存储占用量,以实现给定的内容可检索性级别。通过ndnSIM中的仿真,最终针对名称数据网络体系结构验证了从优化模型中获得的结果。

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