论文标题
多个Antenna位置依赖性内容传递的非对称编码缓存
Asymmetric Coded Caching for Multi-Antenna Location-Dependent Content Delivery
论文作者
论文摘要
有效使用设备存储和计算功能是支持数据密集型应用程序(例如沉浸式数字体验)的关键解决方案。本文提出了一个依赖于位置的多安德纳(Multi-Antenna)编码的基于缓存的内容交付方案,专门针对无线沉浸式观看应用程序量身定制。首先,一个新颖的内存分配过程激发了与已确定的无线瓶颈区域相关的内容。这样可以使本地和全球缓存的收益进行权衡,并导致每个用户缓存位置依赖性多媒体内容的不平等分数。然后,考虑到不对称的缓存位置,在随后的输送阶段进行了新的数据包生成过程。在此阶段,传输给每个用户的数据包数量相同,而数据包的大小与相应的位置依赖性缓存比例成正比。在这方面,每个用户都使用特定于位置的内容,并使用联合多播束面和一个多速率调制方案,同时从全局缓存和空间多路复用中受益。与最先进的相比,数值实验和数学分析显示出显着的性能增长。
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.