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http://dx.doi.org/10.3745/KTCCS.2022.11.2.43

Edge Caching Strategy with User Mobility in Heterogeneous Cellular Network Environments  

Choi, Yoonjeong (숙명여자대학교 IT공학과)
Lim, Yujin (숙명여자대학교 IT공학과)
Publication Information
KIPS Transactions on Computer and Communication Systems / v.11, no.2, 2022 , pp. 43-50 More about this Journal
Abstract
As the use of mobile data increases, the proportion of video content is increasing steeply. In order to solve problems that arise when mobile users receive data from geographically remote cloud servers, methods of caching data in advance to edge servers geographically close to the users are attracting lots of attention. In this paper, we present a caching policy that stores data on Small Cell Base Station(SBS) to effectively provide content files to mobile users by applying a delayed offloading scheme in a cellular network. The goal of the proposed policy is to minimize the size of data transmitted from Macro Base Station(MBS) because the delayed offloading scheme requires more cost than when downloaded from MBS than from SBS. The caching policy is proposed to determine the size of content file and which content file to be cached to SBS using the probability of mobile users' paths and the popularity of content files, and to replace content files in consideration of the overlapping coverage of SBS. In addition, through performance evaluation, it has been proven that the proposed policy reduces the size of data downloaded from MBS compared to other algorithms.
Keywords
Edge Caching; Proactive Caching; User Mobility; Cellular Network;
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