An Adaptive Buffering Scheme for P2P Live and Time-Shifted Streaming
Recently, P2P streaming techniques have been a promising solution to a large-scale live streaming system because of their high scalability and low installation cost. In P2P live streaming systems, however, it is difficult to manage peers’ buffers effectively, because they can buffer only a limited a...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2017-02-01
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| Series: | Applied Sciences |
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| Online Access: | http://www.mdpi.com/2076-3417/7/2/204 |
| _version_ | 1819013697935245312 |
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| author | Eunsam Kim Taeyoung Kim Choonhwa Lee |
| author_facet | Eunsam Kim Taeyoung Kim Choonhwa Lee |
| author_sort | Eunsam Kim |
| collection | DOAJ |
| description | Recently, P2P streaming techniques have been a promising solution to a large-scale live streaming system because of their high scalability and low installation cost. In P2P live streaming systems, however, it is difficult to manage peers’ buffers effectively, because they can buffer only a limited amount of data around a live broadcasting time in the main memory and suffer from long playback lag due to the nature of P2P structures. In addition, the number of peers decreases rapidly as the playback position moves further from this time by performing time-shifted viewing. These situations widen the distribution of peers’ playback positions, thereby decreasing the degree of data duplication among peers. Moreover, it is hard to use each peer’s buffer as the caching area because the buffer area where the chunks that have already been played back are stored can be overwritten at any time by new chunks that will arrive soon. In this paper, we therefore propose a novel buffering scheme to significantly increase data duplication in buffering periods among peers in P2P live and time-shifted streaming systems. In our proposed scheme, the buffer ratio of each peer is adaptively adjusted according to its relative playback position in a group by increasing the ratio of the caching area in its buffer as its playback position moves earlier in time and increasing the ratio of the prefetching area as its playback position moves later. Through extensive simulations, we demonstrate that our proposed adaptive buffering scheme outperforms the conventional buffering technique considerably in terms of startup delay, average jitter ratio, and the ratio of necessary chunks in a buffermap. |
| first_indexed | 2024-12-21T02:04:04Z |
| format | Article |
| id | doaj.art-c2384faae00740b48f1f65450780c8db |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-12-21T02:04:04Z |
| publishDate | 2017-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-c2384faae00740b48f1f65450780c8db2022-12-21T19:19:33ZengMDPI AGApplied Sciences2076-34172017-02-017220410.3390/app7020204app7020204An Adaptive Buffering Scheme for P2P Live and Time-Shifted StreamingEunsam Kim0Taeyoung Kim1Choonhwa Lee2Department of Computer Engineering, Hongik University, Seoul 04066, KoreaPasoo Inc., 396 Worldcup bukro, Mapo-gu, Seoul 03925, KoreaDivision of Computer Science and Engineering, Hanyang University, Seoul 04763, KoreaRecently, P2P streaming techniques have been a promising solution to a large-scale live streaming system because of their high scalability and low installation cost. In P2P live streaming systems, however, it is difficult to manage peers’ buffers effectively, because they can buffer only a limited amount of data around a live broadcasting time in the main memory and suffer from long playback lag due to the nature of P2P structures. In addition, the number of peers decreases rapidly as the playback position moves further from this time by performing time-shifted viewing. These situations widen the distribution of peers’ playback positions, thereby decreasing the degree of data duplication among peers. Moreover, it is hard to use each peer’s buffer as the caching area because the buffer area where the chunks that have already been played back are stored can be overwritten at any time by new chunks that will arrive soon. In this paper, we therefore propose a novel buffering scheme to significantly increase data duplication in buffering periods among peers in P2P live and time-shifted streaming systems. In our proposed scheme, the buffer ratio of each peer is adaptively adjusted according to its relative playback position in a group by increasing the ratio of the caching area in its buffer as its playback position moves earlier in time and increasing the ratio of the prefetching area as its playback position moves later. Through extensive simulations, we demonstrate that our proposed adaptive buffering scheme outperforms the conventional buffering technique considerably in terms of startup delay, average jitter ratio, and the ratio of necessary chunks in a buffermap.http://www.mdpi.com/2076-3417/7/2/204P2P live streamingtime-shifted viewingadaptive bufferingprefetchingcaching |
| spellingShingle | Eunsam Kim Taeyoung Kim Choonhwa Lee An Adaptive Buffering Scheme for P2P Live and Time-Shifted Streaming Applied Sciences P2P live streaming time-shifted viewing adaptive buffering prefetching caching |
| title | An Adaptive Buffering Scheme for P2P Live and Time-Shifted Streaming |
| title_full | An Adaptive Buffering Scheme for P2P Live and Time-Shifted Streaming |
| title_fullStr | An Adaptive Buffering Scheme for P2P Live and Time-Shifted Streaming |
| title_full_unstemmed | An Adaptive Buffering Scheme for P2P Live and Time-Shifted Streaming |
| title_short | An Adaptive Buffering Scheme for P2P Live and Time-Shifted Streaming |
| title_sort | adaptive buffering scheme for p2p live and time shifted streaming |
| topic | P2P live streaming time-shifted viewing adaptive buffering prefetching caching |
| url | http://www.mdpi.com/2076-3417/7/2/204 |
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