内容中心无线网络的存储和传输协作机制研究

项目名称： 内容中心无线网络的存储和传输协作机制研究

项目编号： No.61702205

项目类型： 青年科学基金项目

立项/批准年度： 2018

项目学科： 自动化技术、计算机技术

项目作者： 罗晶晶

作者单位： 华中科技大学

项目金额： 8万元

中文摘要： 随着无线数据流量的爆发增长，无线网络需要承载海量数据的存储和传输。内容中心网络（CCN）通过以内容为中心的数据传输模式实现高效大规模的内容分发，因此有较大潜力解决无线网络的传输性能瓶颈问题。无线CCN作为新兴的研究领域，目前学术界已经在较为理想的情况下对存储转发设计进行了初步的研究，但对于实际网络的考虑和性能分析还不够深入。本项目拟从内容请求时变、用户移动异构和能量消耗约束三个角度出发，探究这些实际场景中的因素对内容存储和传输机制的影响和作用。具体包括：（1）针对内容的时变需求，自适应地调整内容存储和获取的资源分配，设计匹配的存储转发机制；（2）利用移动用户的区域聚集规律，加速用户密集区域的内容传递，设计高效的分区存储转发机制；（3）针对移动终端能量受限问题，平衡通信资源和能量资源消耗，设计节能的存储转发机制。研究成果将对实际内容中心无线网络的设计提供有效的理论支撑和和技术指导。

中文关键词： 内容中心网络；无线传输机制；缓存优化；传输设计；性能分析

英文摘要： As mobile data traffic is increasing at an unprecedented rate, the wireless networks need to deal with storage and transmissions of massive data. The CCN (content-centric networking) paradigm, relying on content-centric forwarding and in-network data caching, has great potential to solve some of the problems encountered by IP-based protocols in wireless networks. Recently, extensive research efforts have been devoted to the analysis of cache-and-forward strategies in wireless CCN. However, previous works rely on some idealistic assumptions, and cannot well capture some properties of the real networks. Therefore, this project aims to design content placement and retrieval strategies in practical settings, i.e., time-varying content popularity, heterogeneous user mobility and limited battery power. The main contributions are listed as follows. 1) To deal with the time-varying requests of contents, we propose a dynamic placement and retrieval strategy, which adaptively allocate network resources for content placement and retrieval based on the request prediction. 2) By utilizing the potential transmission opportunities in popular locations, we propose an effective location-based placement and retrieval strategy, which accelerate content delivery in popular locations. 3) To solve the limited-power problem of mobile users, we propose an energy-saving placement and retrieval strategy, which leads to an optimal tradeoff between energy consumption and communication resource consumption. Overall, this project tries to provide useful insights on the design and deployment of content-centric wireless networks.

英文关键词： Content-Centric Networking;Wireless Communication;Caching Optimization;Transmission Design;Performance Analysis