| 代理协助P2P-VoD系统中基于缓存状态的服务节点选择策略 |
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| 引用本文： | 唐瑞春,徐仕儒,魏青磊.代理协助P2P-VoD系统中基于缓存状态的服务节点选择策略[J].中国海洋大学学报(自然科学版),2010,40(4). |
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| 作者姓名： | 唐瑞春 徐仕儒 魏青磊 |
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| 作者单位： | 中国海洋大学信息科学与工程学院,青岛,266100 |
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| 基金项目： | 国家科技支撑计划项目 |
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| 摘 要： | 研究P2P-VoD系统中提供流媒体服务的公平性问题,提出基于缓存状态的DRPS(Data Receiving Peers as Suppliers)服务节点选择策略,并设计基于DRPS的预分配调度算法PSA(Preassign Scheduling Algorithm)。首先根据缓存状态将节点分类,再结合节点的可用带宽和可用概率进行排序,优先从RS(Receiving Set)节点类中选择服务提供者,最后由客户端执行PSA算法。仿真实例表明该策略的有效性。
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| 关 键 词： | 流媒体 节点选择 缓存状态 服务质量 公平性 |
Supplier Selection Strategy Based on Cache State for Proxy Assistant P2P-VoD System |
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| TANG Rui-Chun,XU Shi-Ru,WEI Qing-Lei.Supplier Selection Strategy Based on Cache State for Proxy Assistant P2P-VoD System[J].Periodical of Ocean University of China,2010,40(4). |
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| Authors: | TANG Rui-Chun XU Shi-Ru WEI Qing-Lei |
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| Institution: | TANG+Rui-Chun,XU+Shi-Ru,WEI+Qing-Lei(College+of+Information+Science+,+Engineering,Ocean+University+of+China,Qingdao+266100,China) |
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| Abstract: | Considering the equity problem for streaming media service in P2P-VoD system.Based on the cache state,Data Receiving Peers as Suppliers(DRPS) for suppliers selection is proposed,and Preassign Scheduling Algorithm(PSA) is designed.First,peers are assorted by cache state,then peers are sorted by bandwidth and availability probability,preference is given to peers in Receiving Set(RS) to be suppli-ers,and at last PSA executs at client.Simulation shows the validity of the proposed strategy. |
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| Keywords: | streaming media supplier selection cache state QoS equity |
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