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首页> 外文会议>IEEE International Symposium on Information Theory >Wyner’s Network on Caches: Combining Receiver Caching with a Flexible Backhaul
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Wyner’s Network on Caches: Combining Receiver Caching with a Flexible Backhaul

机译：Wyner的缓存网络：将接收器缓存与灵活的回程相结合

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In this work, we study a large linear interference network with an equal number of transmitters and receivers, where each transmitter is connected to two subsequent receivers. Each transmitter has individual access to a backhaul link (fetching the equivalent of MT files), while each receiver can cache a fraction γ of the library. We explore the tradeoff between the communication rate, backhaul load, and caching storage by designing algorithms that can harness the benefits of cooperative transmission in partially connected networks, while exploiting the advantages of multicast transmissions attributed to user caching. We show that receiver caching and fetching content from the backhaul are two resources that can simultaneously increase the delivery performance in synergistic ways. Specifically, an interesting outcome of this work is that user caching of a fraction γ of the library can increase the per-user Degrees of Freedom (puDoF) by γ. Further, the results reveal significant savings in the backhaul load, even in the small cache size region. For example, the puDoF achieved using the pair (MT = 8,γ = 0) can also be achieved with the pairs (MT = 4,γ = 0.035) and (MT = 2,γ = 0.1), showing that small caches can provide significant savings in the backhaul load.
机译：在这项工作中，我们研究了具有相等数量的发射器和接收器的大型线性干扰网络，其中每个发射器都连接到两个后续接收器。每个发射机都可以单独访问回程链路（获取M的等效值） T 文件），而每个接收方都可以缓存该库的γ部分。通过设计可以利用部分连接的网络中协作传输的优点的算法，同时利用归因于用户缓存的多播传输的优点，我们探索了通信速率，回程负载和缓存存储之间的权衡。我们展示了接收器缓存和从回程中获取内容是两种资源，它们可以以协同方式同时提高交付性能。具体地说，这项工作的有趣结果是，用户缓存库的一部分γ可以使每个用户的自由度（puDoF）增加γ。此外，结果表明，即使在较小的高速缓存大小区域中，也可以显着节省回程负载。例如，使用该对获得的puDoF（M T = 8，γ= 0）也可以通过对（M T = 4，γ= 0.035）和（M T = 2，γ= 0.1），表明小型缓存可以显着节省回程负载。

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