The lookup mechanism based on resource size was brought forward to solve the problem that current unstructured P2P network lookup algorithms could only get few resources and had bad performance and huge overhead.

Structured P2P system didn’t consider the actual physical topology when building the logical overlay,which would couse a serious mismatching between logical overlay network and physical network.

Fragmented Replication Strategy in Unstructured P2P Networks

Resource-searched algorithm of unstructured P2P network;

Based on the analysis of flooding and Random-Walker search algorithms in an unstructured P2P network,we design a new platform searching algorithm(PFSA) which considers both the depth and the breadth.

D-Trust:A double trust metric based trust model in unstructured P2P network

Based on the widely used flooding Top-k query algorithm of internet,this paper presented an improved threshold Top-k query algorithm of unstructured P2P network by using low boundary of ancestor peers\' local query results in query processing tree as a threshold.

In this paper,by analyzing number of shared resources between the nodes and the network distance between them on the resource classification maintenance and search costs in semantic overlay network,a novel semantic overlay network based on unstructured P2P network is proposed.