论文标题
在动态味o网络中，编码的缓存和空间多路复用增益折衷
Coded Caching and Spatial Multiplexing Gain Trade-off in Dynamic MISO Networks
论文作者
论文摘要
在动态网络设置中也可以实现多ANTENNA编码的缓存技术的全局缓存增益，在该设置中，用户的缓存内容由中央服务器决定，并且每个用户可以随时自由地加入或离开网络。在动态设置中，将用户分配给有限的缓存配置文件，并且在交付阶段，分配给每个配置文件的用户数量的不均匀性是通过添加幻象用户来为多播或服务单次传输的一部分用户而获得的。在本文中，我们进行了彻底的分析，并提供了此类混合方案中可实现的自由度（DOF）的封闭形式表示，并评估由通过添加幻影用户或通过unicasting添加phantom用户或服务部分引起的全球缓存和空间多路复用的固有权衡。
The global caching gain of multi-antenna coded caching techniques can be also mostly achieved in dynamic network setups, where the cache contents of users are dictated by a central server, and each user can freely join or leave the network at any moment. In the dynamic setup, users are assigned to a limited set of caching profiles and the non-uniformness in the number of users assigned to each profile is compensated during the delivery phase by either adding phantom users for multicasting or serving a subset of users with unicast transmissions. In this paper, we perform a thorough analysis and provide closed-form representations of the achievable degrees of freedom (DoF) in such hybrid schemes, and assess the inherent trade-off between the global caching and spatial multiplexing gains caused by either adding phantom users or serving parts of the data through unicasting.
