基于网络编码的移动D2D视频缓存网络内容布设方法研究  

Research on Content Placement Method for Mobile D2D Video Caching Networks Based on Network Coding

作　　者：胡夏芸 李景仙[1] 胡勇[1] 夏欣然 殷俊 HU Xia-yun;LI Jing-xian;HU Yong;XIA Xin-ran;YIN Jun(Jinling Institute of Technology,Nanjing 211169,China;Nanjing University of Posts and Telecommunications,Nanjing 210023,China)

机构地区：[1]金陵科技学院软件工程学院,江苏南京211169 [2]南京邮电大学物联网学院,江苏南京210023

出　　处：《金陵科技学院学报》2023年第2期9-14,84,共7页Journal of Jinling Institute of Technology

基　　金：江苏高校“大学素质教育与数字化课程建设”专项课题(2020JDKT136)。

摘　　要：为了进一步提高移动D2D视频缓存网络用户设备的缓存效用,建立了用户设备缓存内容与缓存收益的数学模型,分析了随机缓存策略和基于网络编码的随机缓存策略的理论收益,提出了一种基于网络编码的截断式内容缓存方法NC-CFRC。多种测试条件下的数值实验结果表明,NC-CFRC方法较已有的随机缓存和截断式缓存等经典方法,内容命中率和适应性均有所提升。Aiming at improving the caching efficiency of user devices in mobile device-to-device(D2D)video caching networks,a mathematical model of caching content and caching benefits on user devices is established.The theoretical benefits of the random caching strategy and the network coding based random caching strategy are analyzed.A network coding based cut-off content caching method,i.e.NC-CFRC,is proposed.The numerical experimental results under various test conditions show the NC-CFRC strategy has great improvements in cache hit rate and adaptability compared with the existing classical strategies such as the random and the cut-off random caching strategies.

关 键 词：移动D2D 视频缓存网络 网络编码 内容布设 

分 类 号：TN929.5[电子电信—通信与信息系统]