Research On Resource Discovery In Mobile P2P Network Based On Semantic Community

With the rapid development of P2P network technology and mobilecommunication technology in recent years, the mobile P2P network has attractedmore and more attention.Mobile P2P network is a dynamic overlay network based onmobile wireless network.The network node is usually mobile devices such as mobilephone, PDA, etc.Compared with P2P network, mobile P2P network is characteristicsof distribution, self-organization and high dynamic.At the same time, it has somerestrictions such as limited energy, communication bandwidth limitation,unpredictable network connection and dynamic topology. These restrictions lead tomobile P2P resource discovery relatively difficult.The evolution process of P2Pnetwork tells us that nodes gathered together with common interests of a certain kindof resources and finally forming a logically equivalent P2P community which issimilar to the community in sociology.Meanwhile, Tim Bermers-Lee and others hadproposed the idea that realize the intelligent service of machine by establishing thesemantic web.Based on the semantic of resources could organize resourceeffectively,the division of the similar nodes into the same semantic community whichcould be helpful to improve the efficency of resource discovery.According to the above situations, this article introduces the semanticcommunities to mobile P2P network.We perform research on resource discovery inmobile P2P network based on semantic community.The main content of this paperincludes equivalent semantic community,the task collaboration model and the methodof resource discovery.The achievement of this paper mainly embodied in thefollowing three aspects:(1)A mobile P2P senmantic model which uses concept tree and share informationcontent method to calculate the node semantic similarity was proposed.Based onsemantic similarity and game theory to contruct the senmantic community. In order tofurther improve the efficiency of resource discovery, this paper comes up with a taskcollaboration logical Model oriented resource discovery in Mobile P2P senmanticcommunity which based on Agent theory and Contract net framework.(2)A resource discovery method based on Prospect theory was proposed.Themethod introduces prospect theory to the resource discovery in P2Pnetwork.Weighting function in Prospect theory was used to choose the next node combined with prospective value to control the path selection in the process ofresource discovery and finally realized the resource discovery in dynamic networkenvironment.(3)We put forward a resource discovery method based on spherical migr-ation.Based on the characteristic of energy limitation; the method utilizes thetransmission characteristics of mobile node to search the optimal node which isconsidered as next-hop node within the maximum effective transmission range toachieve the maximum efficency of resource discovery.