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• W2897039430 abstract "The existing proactive caching policies are designed by assuming that all users request contents with identical activity level at uniformly distributed or known locations, among which most of the policies are optimized by assuming that user preference is identical to content popularity. However, these assumptions are not true based on the recent data analysis. In this paper, we investigate what happens without these assumptions. To this end, we establish a framework to optimize caching policy for base stations exploiting heterogeneous user preference, activity level, and spatial locality. We derive success probability and average rate of each user as utility function, respectively, and obtain the optimal caching policy maximizing a weighted sum of average utility (reflecting network performance) and minimal utility of users (reflecting user fairness). To investigate the intertwined impact of individual user request behavior on caching, we provide an algorithm to synthesize user preference from given content popularity and activity level with controlled preference similarity and validate the algorithm with the real datasets. Analysis and simulation results show that exploiting individual user behavior can improve both network performance and user fairness, and the gain increases with the skewness of spatial locality, and the heterogeneity of user preference and activity level." @default.
• W2897039430 created "2018-10-26" @default.
• W2897039430 creator A5056036725 @default.
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• W2897039430 date "2019-02-01" @default.
• W2897039430 modified "2023-10-15" @default.
• W2897039430 title "Caching at Base Stations With Heterogeneous User Demands and Spatial Locality" @default.
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• W2897039430 doi "https://doi.org/10.1109/tcomm.2018.2876424" @default.
• W2897039430 hasPublicationYear "2019" @default.
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