We propose a complete framework targeting operator-driven content caching that can be equally applied to both ISP-operated Content Delivery Networks (CDNs) and future Information-Centric Networks (ICNs). In contrast to previous proposals in this area, our solution leverages operators’ control on cache placement and content routing, managing to considerably reduce network operating costs by minimizing the amount of transit traffic and balancing load among available network resources. In addition, our solution provides two key advantages over previous proposals. First, it allows for a simple computation of the optimal cache placement. Second, it provides knobs for operators to fine-tune performance. We validate our design through both analytical modeling and trace-driven simulations and show that our proposed solution achieves on average twice as many cache hits in comparison to previously proposed techniques, without increasing delivery latency. In addition, we show that the proposed framework achieves 19-33% better load balancing across links and caching nodes, being also robust to traffic spikes.

中文翻译：

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运营商管理内容缓存的框架和算法

我们提出了一个针对运营商驱动的内容缓存的完整框架，该框架可以同样应用于 ISP 运营的内容交付网络 (CDN) 和未来的以信息为中心的网络 (ICN)。与之前在该领域的提议相比，我们的解决方案利用运营商对缓存放置和内容路由的控制，通过最大限度地减少传输流量和平衡可用网络资源之间的负载来显着降低网络运营成本。此外，我们的解决方案与之前的建议相比具有两个关键优势。首先，它允许对最佳缓存放置进行简单的计算。其次，它为操作员提供了微调性能的旋钮。我们通过分析建模和跟踪驱动的模拟验证了我们的设计，并表明与之前提出的技术相比，我们提出的解决方案平均实现了两倍的缓存命中，而不会增加交付延迟。此外，我们表明，所提出的框架在链接和缓存节点之间实现了 19-33% 的更好的负载平衡，并且对流量峰值也具有鲁棒性。