Cache Hit Ratio Maximization in Device-to-Device Communications Overlaying Cellular Networks  

作　　者：Liang Zhong Xueqian Zheng Yong Liu Mengting Wang Yang Cao 

机构地区：[1]China University of Geosciences School of Mechanical Engineering and Electronic Information,Department of Electronics and Information Engineering,Wuhan,China [2]Huazhong University of Science and Technology,Wuhan,China

出　　处：《China Communications》2020年第2期232-238,共7页中国通信（英文版）

基　　金：partly supported by the Na-tional Natural Science Foundation of China (No.61601334,61601509)

摘　　要：This paper investigates the content placement problem to maximize the cache hit ratio in device-to-device(D2D)communications overlaying cellular networks.We consider offloading contents by users themselves,D2D communications and multicast,and we analyze the relationship between these offloading methods and the cache hit ratio.Based on this relationship,we formulate the content placement optimization as a cache hit ratio maximization problem,and propose a heuristic algorithm to solve it.Numerical results demonstrate that the proposed scheme can outperform existing schemes in terms of the cache hit ratio.This paper investigates the content placement problem to maximize the cache hit ratio in device-to-device(D2 D) communications overlaying cellular networks. We consider offloading contents by users themselves, D2 D communications and multicast, and we analyze the relationship between these offloading methods and the cache hit ratio. Based on this relationship, we formulate the content placement optimization as a cache hit ratio maximization problem, and propose a heuristic algorithm to solve it. Numerical results demonstrate that the proposed scheme can outperform existing schemes in terms of the cache hit ratio.

关 键 词：Cache hit ratio content placement device-to-device MULTICAST 

分 类 号：TN929.5[电子电信—通信与信息系统]