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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。 更多还原

【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... 更多还原