Coded caching (CC) schemes exploit the cumulative cache memory of network users, outperforming traditional uncoded schemes where cache contents are only used locally. Interestingly, this CC gain can also be combined with the spatial multiplexing gain of multi-antenna transmissions. In this paper, we extend the existing results of CC-aided data delivery in multi-access point (AP) wireless local area networks (WLAN) and video streaming applications by assuming multi-antenna transmitters at AP nodes. We present two distinct methods for using the extra resource that multi-antenna transmitters provide. While the first method tries to reduce the number of interference links in the network graph, the second one aims to remove inter-stream interference so that users with similar cache contents can be served simultaneously. While both methods provide increased throughput, they differ significantly in the underlying concept. Numerical simulations are used to compare the performance of different methods.

翻译：编码缓存（CC）方案利用网络用户的累积缓存内存，优于传统的仅本地使用缓存内容的非编码方案。有趣的是，这种CC增益还可与多天线传输的空间复用增益相结合。本文通过假设AP节点采用多天线发射器，扩展了现有关于CC辅助数据传递在多接入点（AP）无线局域网（WLAN）及视频流应用中的成果。我们提出了两种利用多天线发射器提供的额外资源的明确方法：第一种方法试图减少网络图中的干扰链路数量，第二种方法旨在消除码间干扰，使得缓存内容相似的用户可以同时被服务。尽管两种方法都能提升吞吐量，但其核心概念存在显著差异。通过数值仿真比较了不同方法的性能。