| Summary: | 碩士 === 南臺科技大學 === 資訊工程系 === 104 === With the increasing demands of social and mobile video streaming
applications, limited band-width and error–prone channel conditions on wireless
links resulting in the long video buffering time when users watching online videos.
The mobile devices operating in 3G and LTE have high energy consumptions.
Unstable wireless transmission and users' moving behaviors, results in
intermittent disruptions while users watching online videos. How to shorten the
user waiting time for watching online videos and reduce energy consumptions of
mobile devices become an important issue in mobile computing. In this paper, we
propose a social-aware energy-conserving video segment prefetching and caching
strategy for heterogeneous mobile devices. In the proposed video segment
prefetching and caching strategy, sharing video contents in social networks are
classified according to the interests of individual user preferences. A content
interest ratio (CIR) is defined and calculated for predicting what video content
will have a higher interest to the user, and then the video content is prefetched and
cached according to the calculated CIR value, current battery power, and current
wireless link type, e.g., 3G, LTE, or WiFi. As a result, the proposed video segment
prefetching and caching strategy can reduce transmission delay, while giving
users a good quality of video services.
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