The resource locating strategy based on sub-domain hybrid P2P network model

Abstract

P2P networks are important parts of the next generation Internet and P2P file sharing has become one of the most important internet application systems in the world. But P2P network faces a challenge in locating resource: the unstructured P2P network has complex search functions, but the efficiency of resource locating is low. However, it is efficient to locate resources in structure P2P network, but it does not support fuzzy queries and has the higher maintenance cost of network. So how to search the resources in the P2P networks efficiently is becoming the key problem. In traditional network structure, it is difficult to simultaneously meet users' requirements in resource locating efficiency and recall ratio. So this paper proposes a sub-domain hybrid P2P network model (SHPNM), which makes full use of the advantages of supporting fuzzy queries in the unstructured network and maintains efficient in resource locating in structured P2P network. Then it gives a detailed analysis about the design idea of SHPNM as well as the method of resources locating in this model. The nodes are gathered into a domain according to the approaching of nodes' physical location, and the nodes in a domain can form a structured P2P network. Each domain provides two nodes with biggest comprehensive performance value as a boundary node and a backup node, and the boundary nodes are connected together in the form of unstructured P2P networks. Simulations results show that SHPNM can both improve efficiency in locating resource and promote the recall ratio.