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arXiv 2203.12295cs.ITmath.IT
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动态MISO网络中编码缓存与空间复用增益的权衡

Coded Caching and Spatial Multiplexing Gain Trade-off in Dynamic MISO Networks

Milad Abolpour, MohammadJavad Salehi, Antti Tolli

摘要:

多天线编码缓存技术的全局缓存增益也可以主要在动态网络设置中实现,其中用户的缓存内容由中央服务器决定,并且每个用户可以在任何时刻自由地加入或离开网络。在动态设置中,用户被分配到一组有限的缓存配置文件,分配给每个配置文件的用户数量的非均匀性在交付阶段通过添加幻影用户进行多播或服务于具有单播传输的用户子集来补偿。在本文中,我们进行了彻底的分析,并提供封闭形式的表示,可实现的自由度(DoF),在这种混合方案,并评估固有的权衡全局缓存和空间复用的增益所造成的,无论是增加幻影用户或服务部分的数据,通过单播。

英文摘要:

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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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