Research On Resource Searching Strategy In Mobile Peer-to-Peer Network

With fast development of mobile telecommunication, the band of mobile network is becoming wider and wider and the mobile termination's processing ability is getting stronger and stronger. P2P technology which is used widely in Internet will extend to mobile equipment and be used more widely. It has significant meaning of using P2P in mobile environment for operation business and users. Mobile Peer-to-Peer Network (MP2P) has the following characteristics, such as continuously changed network structure, source-limited nodes, network address mismatch with identification mechanism and so on. All these characteristics make using P2P have to solve a serial problems such as network structure, resource searching strategy, data dissemination, security and privacy and trusty transmission. Two key problems: resource searching and trusty transmission has been studied.For resource searching, the existing researches have deficiency in flexibility, proportionality, adaptability. A M-Tapestry resource searching model has been designed based on Tapestry from improving existing P2P searching strategy in order to be suitable for MP2P Network perspective. The main thought is importing super node according the ability of nodes. And the super node substitutes for ordinary node to access Tapestry system. The overhead of ordinary node and reliability problem caused by updating routing table frequently are shielded. In addition, nodes are zoned based on geographical position to avoid the issue that the adjacent nodes in identity actually far away which caused by hash operation. Better performance in mobility supportive, reliability, error tolerance and memory need are founded based on analysis in theory and experiment. And it's suitable to be used in MP2P Network.In trusty transmission aspect, it will cause a serial problems if introduces TCP protocol directly to MP2P Network. Using a trusty transmission mechanism—Cross-Layer-Optimization Trusty Transmission in MP2P Network is put forward. The main concept is building a communication of cross-layer information to achieve optimization with consideration of interaction of each layer. Performance of the mechanism has been analyzed in theory and proved it's suitable for MP2P Network.