异构网络中基于兴趣感知的聚类缓存策略

doi:10.3969/j.issn.1001-506X.2020.11.27

Abstract

Abstract:

In response to the explosive growth of mobile traffic, the introduction of cache in heterogeneous networks (HetNets) has become one of the hot research directions. At present, the cache deployment strategy has some problems, such as low cache hit rate and high cache data redundancy, which does not make full use of storage resources and directly affects the network performance. To solve the above problems, a virtual clustering cooperative cache deployment strategy based on user interest-aware is proposed to improve the performance of cache system. Virtual clustering is constructed according to the user distance, and the system cache content is determined according to the content request factor. The cache content is shared by base station cooperative caching and virtual clustering among users. The optimization model is established to maximize the cache hit rate and is solved by greedy algorithm. Theoretical analysis and simulation results show that, compared with the existing methods, the proposed method has significantly improved the performance of cache hit rate and system average transmission delay in HetNets scenarios.

Key words: heterogeneous networks (HetNets), interest-aware, clustering, collaborative caching

CLC Number:

TP914

Yaohua XU, Yinyin SHENG, Guizhu WANG, Fang JIANG, Yi WANG, Weiwei YUAN, Huiming XU. Clustering caching strategy based on interest-aware in HetNets[J]. Systems Engineering and Electronics, 2020, 42(11): 2629-2635.

Figures/Tables 10

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References 25

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仿真参数	参数设置
MBS、SBS半径/m	500、200
SBS个数	5
D2D通信半径/m	10
小区用户数	[100, 1 000]
UEs缓存容量/GB	5
SBS缓存容量/GB	2
带宽/MHz	100
D2D、SBS、MBS传输速率/(Mbit/s)	[30, 50]、[10, 25]、[10, 25]
内容大小/Mb	[100, 200]
路损常数	10^-1
路损指数	1

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Clustering caching strategy based on interest-aware in HetNets

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