Quasi-Chord:物理拓扑感知的结构化对等网

Quasi-Chord:A Physical Topology Awared Structured P2P Network

针对P2P领域中的逻辑覆盖网与底层物理网络匹配问题,结合Chord模型的思想,提出一种基于底层物理网络构建逻辑覆盖网络的Quasi-Chord模型。利用全局定位网络坐标系统(GNP)对覆盖网中的主机在物理层中进行定位,将定位得到的二维空间坐标通过Cantor空间填充曲线映射到一维空间,并利用Cantor值来建立Quasi-Chord环。仿真试验表明这种方法可以有效地降低网络延迟,减少网络流量。

To solve the matched problem between the logical and physical network, a Quasi-Chord model is used to build a logical network based on the physical network. This model uses a global network position （GNP） system to coordinate the host on the physical layer. Then the Cantor space filling Curve is used a to map the 2-dimensional coordinate space into a 1- dimensional space for the Quasi-Chord. Simulating experiment shows that this method can effectively lower the network delay and decrease the network flow.