| P2P环境下影像数据流传输的资源定位及选择研究 |
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| 引用本文： | 刘异,龚健雅,呙维.P2P环境下影像数据流传输的资源定位及选择研究[J].测绘学报,2010,39(4):383-389. |
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| 作者姓名： | 刘异 龚健雅 呙维 |
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| 作者单位： | 武汉大学,测绘学院,湖北,武汉,430074;武汉大学测绘遥感信息工程国家重点实验室,湖北,武汉,430074 |
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| 基金项目： | 国家973计划，国家863计划 |
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| 摘 要： | 在传统P2P资源定位方法的基础上,对空间P2P系统采用一种网格索引peer分组来实现资源定位,并探讨peer选择策略来优化资源定位结果,采用历史速度记录反馈推测peer选择优先级使得性能高和可靠的peer可以优先被选择.大量模拟实验测试peer选择策略局部最优和不等概率随机选择两种模式,结果显示peer选择策略的有效性以及有效性程度取决于peer个数、资源文件大小和用户行为等应用场景.
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| 关 键 词： | P2P 影像 流传输 peer 选择 资源定位 |
Resource Locating and Selection for Spatial Image Streaming on P2P Network |
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| LIU Yi,GONG Jianya,GUO Wei.Resource Locating and Selection for Spatial Image Streaming on P2P Network[J].Acta Geodaetica et Cartographica Sinica,2010,39(4):383-389. |
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| Authors: | LIU Yi GONG Jianya GUO Wei |
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| Institution: | LIU Yi1,GONG Jianya2,GUO Wei2 1.School of Geodesy and Geomatics,Wuhan University,Wuhan 430074,China,2.State Key Laboratory of Information Enginee-ring in Surveying,Mapping and Remote Sensing |
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| Abstract: | The authors explore non-linear content access mode of spatial data on virtual earth,and then adopt grid-based peer group for resource locating on top of traditional P2P locating method.Further,peer selection mechanisms to optimize the results of resource locating are discussed.Historical download speed records are combined to estimate the preference of peer so that high capacity and reliable peer can be chosen firstly.Two modes of our peer selection mechanism that are local optimal and non-equal probability... |
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| Keywords: | P2P |
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