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D2D caching vs. small cell caching: Where to cache content in a wireless network?

机译:D2D缓存与小单元缓存:在无线网络中的哪里缓存内容?

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Proximity-based content caching and distribution in wireless networks has been identified as a promising traffic offloading solution for improving the capacity and the quality of experience (QoE) by exploiting content popularity and spatiotemporal request correlation. In this paper, we address the following question: where should popular content be cached in a wireless network? For that, we model a wireless cellular network using stochastic geometry and analyze the performance of two network architectures, namely caching at the mobile device allowing device-to-device (D2D) connectivity and local caching at the radio access network edge (small cells). We provide analytical and numerical results to compare their performance in terms of the cache hit probability, the density of cache-served requests and average power consumption. Our results reveal that the performance of cache-enabled networks with either D2D caching or small cell caching heavily depends on the user density and the content popularity distribution.
机译:无线网络中基于接近度的内容缓存和分发已被认为是一种有前途的流量卸载解决方案,用于通过利用内容受欢迎程度和时空请求相关性来提高容量和体验质量(QoE)。在本文中,我们解决以下问题:流行内容应在无线网络中缓存在何处?为此,我们使用随机几何模型对无线蜂窝网络进行建模,并分析两种网络体系结构的性能,即在移动设备上进行缓存以实现设备到设备(D2D)的连接,并在无线访问网络边缘(小型小区)进行本地缓存。我们提供分析和数值结果,以比较其在缓存命中率,缓存服务请求的密度和平均功耗方面的性能。我们的结果表明,具有D2D缓存或小型单元缓存的启用缓存的网络的性能在很大程度上取决于用户密度和内容受欢迎程度的分布。

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