计算机与数字工程Issue(9)：2242-2246,2256,6.DOI:10.3969/j.issn.1672-9722.2019.09.026
一种基于合作缓存的D2D通信缓存策略∗
A Caching Strategy in D2D Communication Based on Cooperative Caching
摘要
Abstract
Users can make use of Device-to-Device(D2D)to share the cached data in response to the explosive growth of fu?ture global mobile data traffic. A good caching strategy plays an important role in the D2D wireless caching network. However,the cache hit rate is not high and the data is excessively redundant. The user needs a good caching strategy. In this paper,a convex opti?mization problem is set up aiming to maximize the cellular network traffic offloading. Then,a cooperative caching method that com?bined with the caching of the adjacent users is introduced to redefine the quested probability of data. The caching problem is trans?formed into a knapsack problem and the greedy algorithm is used to solve the problem. Finally,a caching strategy based on coopera?tive caching is put forward. Simulation results show that the cache strategy can effectively improve the cache hit rate and offloading rate to 60%.关键词
终端直通(D2D)/数据共享/缓存策略/蜂窝流量卸载/合作缓存/背包问题Key words
Device-to-Device(D2D)/data sharing/caching strategy/cellular traffic offloading/cooperative caching/ knapsack problem分类
信息技术与安全科学引用本文复制引用
虞新颖,谭冲,刘洪,郑敏,卜智勇..一种基于合作缓存的D2D通信缓存策略∗[J].计算机与数字工程,2019,(9):2242-2246,2256,6.基金项目
上海市科学技术委员会科研计划项目(编号:16511103002) （编号:16511103002）
国家自然科学基金项目(编号:61401445) （编号:61401445）
国家高技术研究发展计划项目(编号:2015AA01A702)资助. （编号:2015AA01A702）
