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http://dx.doi.org/10.6109/jkiice.2017.21.8.1498

Wireless Caching Techniques Based on Content Popularity for Network Resource Efficiency and Quality of Experience Improvement  

Kim, Geun-Uk (Department of Information Communication Engineering, Pukyong National University)
Hong, Jun-Pyo (Department of Information Communication Engineering, Pukyong National University)
Publication Information
Journal of the Korea Institute of Information and Communication Engineering / v.21, no.8, 2017 , pp. 1498-1507 More about this Journal
Abstract
According to recent report, global mobile data traffic is expected to increase by 11 times from 2016 to 2020. Moreover, this growth is expected to be driven mainly by mobile video traffic which is expected to account for about 70% of the total mobile data traffic. To cope with enormous mobile traffic, we need to understand video traffic's characteristic. Recently, the repetitive requests of some popular content such as popular YouTube videos cause a enormous network traffic overheads. If we constitute a network with the nodes capable of content caching based on the content popularity, we can reduce the network overheads by using the cached content for every request. Through device-to-device, multicast, and helpers, the video throughput can improve about 1.5~2 times and prefix caching reduces the playback delay by about 0.2~0.5 times than the conventional method. In this paper, we introduce some recent work on content popularity-based caching techniques in wireless networks.
Keywords
Caching; Content popularity; Multicast; Helper; Wireless content delivery;
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