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

ZHOU Xian; SONG Hui; PAN Daru; HUANG Xu

doi:10.6054/j.jscnun.2021049

Journal of South China Normal University (Natural Science Edition) > 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

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

School of Physics and Telecommunication Engineering, South China Normal University, Guangzhou 510006, China

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Received Date: November 12, 2020
Available Online: July 05, 2021

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Abstract

Abstract

In order to optimize the D2D cache hit ratio, the mobile helper equipments (HEs) cache is added to the cluster users. At the same time, a popular file chunk batch cache strategy (FCPhit) based on the helper equipment is proposed. Firstly, users with similar file requests are clustered into one cluster. Then, the users are batched and the popular file is divided into several chunks. The user equipment caches the first chunk of the file and HEs cache the other file chunks. Finally, the strategy is compared with the most popular existing caching strategy (MPhit), the optimal caching strategy (OCPhit), and the equal probability random cache strategy (EPRC). The results show that the present strategy can effectively improve the cache hit ratio of the system.
- D2D communication,
- cache strategy,
- helper equipment,
- cluster

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