Proactive Web caching with cumulative prefetching for large multimedia data
Proceedings of the 9th international World Wide Web conference on Computer networks : the international journal of computer and telecommunications netowrking
Segment-based proxy caching of multimedia streams
Proceedings of the 10th international conference on World Wide Web
Adaptive and lazy segmentation based proxy caching for streaming media delivery
NOSSDAV '03 Proceedings of the 13th international workshop on Network and operating systems support for digital audio and video
Playback Restart In Interactive Streaming Video Applications
ICMCS '97 Proceedings of the 1997 International Conference on Multimedia Computing and Systems
Partial prefetch for faster surfing in composite hypermedia
USITS'01 Proceedings of the 3rd conference on USENIX Symposium on Internet Technologies and Systems - Volume 3
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Segment-based proxy caching schemes have been effectively used to deliver streaming media objects. However, this approach does not always guarantee continuous delivery because the to-be-viewed segments may not be cached in the proxy in time. The potential consequence is the playback jitter at the client side due to the proxy delay in fetching these uncached segments, thus we call the problem proxy jitter. Aiming at improving the media delivery quality for segment-based caching schemes, in this paper we propose two simple and effective prefetching methods, namely, look-ahead window based prefetching and active prefetching to address the problem of proxy jitter. We focus on presenting streaming flow analyses on proxy and network resource utilizations and consumptions, performance potentials and limits of the two prefetching methods for different segment-based schemes under different network bandwidth conditions. Our study also provides some new insights into relationships between proxy caching performance and the quality of streaming. For example, we show that the objective of improving the byte hit ratio in a conventional proxy and the unique objective of minimizing the proxy jitter to deliver streaming media objects can have conflicting interests. Trace-driven simulations show the effectiveness of our prefetching methods, and further confirm our analyses.