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- W2794884264 abstract "Several real-time delay-sensitive applications pose varying degrees of freshness demands on the requested content. The performance of cache replacement policies that are agnostic to these demands is likely to be sub-optimal. Motivated by this concern, in this paper, we study caching policies under a request arrival process which incorporates user freshness demands. We consider the performance metric to be the steady-state cache hit probability. We first provide a universal upper bound on the performance of any caching policy. We then analytically obtain the content-wise hit-rates for the Least Popular (LP) policy. Our key contributions are two-fold. Firstly, we develop a modified version of the LP policy which ejects cache redundancies present in the form of stale contents. Secondly, we propose a new policy which outperforms the above policies by explicitly using freshness specifications of user requests to prioritize among the cached contents. We corroborate our analytical insights with extensive simulations." @default.
- W2794884264 created "2018-04-06" @default.
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- W2794884264 date "2018-01-01" @default.
- W2794884264 modified "2023-09-26" @default.
- W2794884264 title "Caching policies under content freshness constraints" @default.
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- W2794884264 doi "https://doi.org/10.1109/comsnets.2018.8328227" @default.
- W2794884264 hasPublicationYear "2018" @default.
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