Flexible Content Caching Exploiting Spatio-Temporal Budget Sharing

초록

As media data consumption increases, the content caching technology that delivers content with low latency using an MEC server has been proposed. However, the caching resources of the MEC server are limited, and even if the same amount of caching resources are used, the effectiveness of content caching changes depending on the time zone or region. In this paper, we propose a ProCache that maximizes the effectiveness of content caching by using caching resources flexibly in spatial and temporal domains. In particular, when each content has a different size and location of remote content server, ProCache minimizes content delivery latency under a given time-average caching budget using Lyapunov optimization. Based on the simulation using the YouTube dataset, we evaluate the content delivery time per request and the cache hit ratio of the ProCache. The simulation results show that the proposed ProCache outperforms existing content caching algorithms by enabling spatio-temporal budget sharing. © 2024, Korean Institute of Communications and Information Sciences. All rights reserved.

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