Efficient usage of in-device storage and computation capabilities are key solutions to support data-intensive applications such as immersive digital experiences. This paper proposes a location-dependent multi-antenna coded caching -based content delivery scheme tailored specifically for wireless immersive viewing applications. First, a novel memory allocation process incentivizes the content relevant to the identified wireless bottleneck areas. This enables a trade-off between local and global caching gains and results in unequal fractions of location-dependent multimedia content cached by each user. Then, a novel packet generation process is carried out during the subsequent delivery phase, given the asymmetric cache placement. During this phase, the number of packets transmitted to each user is the same, while the sizes of the packets are proportional to the corresponding location-dependent cache ratios. In this regard, each user is served with location-specific content using joint multicast beamforming and a multi-rate modulation scheme that simultaneously benefits from global caching and spatial multiplexing gains. Numerical experiments and mathematical analysis demonstrate significant performance gains compared to the state-of-the-art.

翻译：高效利用设备存储和计算能力是支持沉浸式数字体验等数据密集型应用的关键解决方案。本文提出一种专为无线沉浸式观看应用量身定制的基于位置相关多天线编码缓存的内容传输方案。首先，一种新颖的内存分配过程激励与已识别无线瓶颈区域相关的内容，从而在本地缓存增益与全局缓存增益之间取得平衡，并导致每个用户缓存的位置相关多媒体内容呈现非均匀比例。随后，在传输阶段，针对非对称缓存布局，执行一种新颖的数据包生成过程。在此阶段，传输至每个用户的数据包数量相同，而数据包大小与相应位置相关缓存比例成正比。基于此，每个用户通过联合多播波束成形与多速率调制方案获取位置特定内容，该方案同时利用全局缓存增益与空间复用增益。数值实验与数学分析表明，与现有最优方案相比，该方法取得了显著的性能增益。