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:高效使用内部储存和计算能力是支持数据密集型应用的关键解决办法,例如:沉浸式数字经验。本文件建议了专门为无线沉浸式浏览应用专门设计的基于位置的多antenna编码的缓存-基于内容的交付方案。首先,一个新的记忆分配程序激励了与已查明的无线瓶颈区相关的内容。这可以使本地和全球缓存收益之间发生权衡,并导致每个用户隐藏的基于位置的多媒体内容的不均匀部分。随后,在交付阶段,鉴于不对称缓存位置,将进行新的货包生成过程。在这一阶段,向每个用户传送的货包数量相同,而包的大小与相应的基于位置的缓存比率成比例成正比。在这方面,每个用户都得到特定地点内容的服务,使用联合的多播放波束和多速调制方案,同时从全球缓存和空间多路交收益中获益。数量实验和数学分析显示与状态相比,业绩得显著。