A Hierarchical P2P Semantic Overlay Network Architecture Based on Topic and Physical Proximity

The main methods to construct P2P overlay network are index and super-node, which introduce bottleneck problem and ignore the significant influence of topology aware problem. A new P2P overlay network TPPH is established. It combines the virtue of efficient locating performance of structured P2P network and complex searching function of unstructured P2P network. Based on physical network topology, it partitioned nodes into topic domain by utilizing distributed hash table mechanism, and according to physical-proximity principle it clustered nodes within a domain. Analysis and simulation results indicate that TPPH can dramatically increase the recall and decrease the searching latency simultaneously, thus it is complex searching available and a high performance semantic overlay network architecture.