EAGER: Coded Caching for Heterogeneous and Energy Harvesting Systems

对具有高数据速率要求的内容的需求达到了前所未有的水平。像视频点播这样的服务，曾经被认为是不可能通过资源有限的无线渠道提供的，在不久的将来将成为常态，而不是例外。因此，下一代设计需要利用新的资源来满足用户的需求。编码缓存在这个方向上是一个很有前途的范例，因为它提供本地数据存储作为缓解网络拥塞的一种手段。该项目旨在通过解决节点数据存储容量的异构性，在弥合编码缓存理论与实践之间的差距方面取得重大进展。该项目还提出了一种新的内容交付网络架构，该架构设想包括能量收集节点，在设计缓存策略时需要明确考虑这些节点的异构能量可用性。该项目涉及对具有异构缓存大小的网络的缓存放置和交付策略进行优化。在这些策略的基础上，该项目还将继续研究方向，即通过利用能量收集通信网络中的缓存来提高能源的可持续性。本研究将以资讯理论、通讯理论及优化理论为工具，并具基础性。该项目的更广泛影响包括为下一代内容交付网络的设计提供信息，以及为内容交付网络引入能量收集节点的新网络架构的愿景做出贡献。更广泛的教育影响包括通过邀请讲座、教程和出版物传播，以及将研究成果整合到研究生课程中。

Demand for content with high data rate requirements has reached unprecedented levels. Services like video on-demand, once thought impossible to deliver through resource constrained wireless channels, will become the norm rather than the exception in the near future. Next generation designs thus need to utilize new resources to satisfy user demands. Coded caching is a promising paradigm in this direction in that it offers local data storage as a means to alleviate network congestion. This project aims to make significant progress in bridging the gap between theory and practice of coded caching by addressing the heterogeneity in the data storage capacities of the nodes. This project also puts forward a new content delivery network architecture envisioned to include energy harvesting nodes whose heterogeneous energy availability needs to be explicitly taken into account in designing caching strategies.The project involves optimizing caching placement and delivery strategies for networks with heterogeneous cache sizes. Building on these strategies, the project will also pursue the research direction where energy sustainability is improved by capitalizing caching in energy harvesting communication networks. The research will utilize information theory, communication theory and optimization as tools and is envisioned to be of fundamental nature. The broader impact of the project includes informing the design of next generation content delivery networks, as well as contributing to the vision of new network architectures with energy harvesting nodes introduced to content delivery networks. The educational broader impact includes dissemination through invited lectures, tutorials, and publications, as well as integration of research results into the graduate curriculum.