“…Whether for a network service provider or a network user, it is urgent to grasp the IP network performance and status parameters, as well as the network's operational performance and behavior characteristics in order to optimize network applications and improve service efficiency. Inter-node delay is one of the key parameters that can reflect network performance and state, and many Internet applications rely on accurate delay measurement, such as distributed overlay network multicast [1,2], content addressable overlay network [3], P2P file sharing [4], online games and IP positioning based on network coordinate system [5,6] and so forth. However, due to the large-scale, high-dynamic, self-organizing complexity of the network, it is extremely difficult to accurately and completely measure the inter-node delay.…”