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基于辅助设备的D2D集群的文件块缓存策略研究

周仙 宋晖 潘达儒 黄旭

周仙, 宋晖, 潘达儒, 黄旭. 基于辅助设备的D2D集群的文件块缓存策略研究[J]. 华南师范大学学报(自然科学版), 2021, 53(3): 106-112. doi: 10.6054/j.jscnun.2021049
引用本文: 周仙, 宋晖, 潘达儒, 黄旭. 基于辅助设备的D2D集群的文件块缓存策略研究[J]. 华南师范大学学报(自然科学版), 2021, 53(3): 106-112. doi: 10.6054/j.jscnun.2021049
ZHOU Xian, SONG Hui, PAN Daru, HUANG Xu. The File Chunk Cache Strategy for D2D Cluster Based on Mobile Helpers[J]. Journal of South China normal University (Natural Science Edition), 2021, 53(3): 106-112. doi: 10.6054/j.jscnun.2021049
Citation: ZHOU Xian, SONG Hui, PAN Daru, HUANG Xu. The File Chunk Cache Strategy for D2D Cluster Based on Mobile Helpers[J]. Journal of South China normal University (Natural Science Edition), 2021, 53(3): 106-112. doi: 10.6054/j.jscnun.2021049

基于辅助设备的D2D集群的文件块缓存策略研究

doi: 10.6054/j.jscnun.2021049
基金项目: 

国家自然科学基金项目 61801184

国家自然科学基金项目 61771206

国家自然科学基金项目 61471175

详细信息
    通讯作者:

    宋晖,Email: songhui@m.scun.edu.cn

  • 中图分类号: TP393

The File Chunk Cache Strategy for D2D Cluster Based on Mobile Helpers

  • 摘要: 为了解决D2D缓存命中概率的最优化问题,在集群用户中加入了移动辅助设备(HEs)缓存,同时,提出了基于辅助设备的D2D集群的流性文件块分批缓存策略(FCPhit):首先,将有相似文件请求的用户群置于一个集群中;然后,将用户分批并将流行文件分为若干块,用户设备缓存文件的第1块,移动辅助设备缓存其他文件块. 并与已有的最流行缓存策略(MPhit)、最优缓存策略(OCPhit)和等概率缓存策略(EPRC)进行对比实验,结果表明:FCPhit策略可以有效提高系统的缓存命中概率.
  • 图  1  用户集群图

    Figure  1.  The figure of user cluster

    图  2  示例分批缓存

    Figure  2.  The example for batch cache

    图  3  文件分块示意图

    Figure  3.  The figure of file chunk

    图  4  文件数的选取

    Figure  4.  The selection of file number

    图  5  4种策略下zipf指数对系统的缓存命中概率的影响

    Figure  5.  The impact of the zipf parameter on the system's cache hit probability under four strategies

    图  6  4种策略下用户缓存容量对系统的缓存命中概率的影响

    Figure  6.  The impact of cache capacity on the system's cache hit probability under four strategies

    图  7  4种策略下用户数对系统的缓存命中概率的影响

    Figure  7.  The impact of the number of uses on the system's cache hit probability under four strategies

    图  8  4种策略下文件数对系统的缓存命中概率的影响

    Figure  8.  The impact of the file number on the system's cache hit probability under four strategies

    图  9  3种zipf指数下集群数量对系统的缓存命中概率的影响

    Figure  9.  The impact of the cluster number on the system's cache hit probability under three zipf parameter

    图  10  3种移动速度下辅助设备个数对系统的缓存命中概率的影响

    Figure  10.  The impact of the helper number on the system's cache hit probability under three moving rate

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出版历程
  • 收稿日期:  2020-11-13
  • 网络出版日期:  2021-07-06
  • 刊出日期:  2021-06-25

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