A resource release and query method in a structured p2p network

Abstract

The invention relates to a structured P2P network resource publishing and querying method. According to the method, key words are determined by utilizing the feature of high adjacent word correlation, resource is indexed according to the key words, and the problem of multiple key word querying of a structured P2P network is solved ingeniously by the method of establishing multiple dimensional indexes through single data; the single key word querying is adopted, the structured P2P network is capable of supporting key word accurate matching resource retrieval and supporting querying of resources correlative to input content, and the more complete query results can be acquired; the applicability of the method is improved, the querying efficiency is improved, and communication cost is reduced.

Description

technical field [0001] The invention relates to the technical field of computer communication, in particular to a method for publishing and querying resources in a structured P2P network. Background technique [0002] Peer-to-peer network (Peer to Peer) is a network structure system in which resources are distributed, utilized and shared. Each node in the network is both a client and a server, and the nodes communicate directly to exchange data and messages instead of relying on centralized server for management. Structured P2P is a classification of P2P systems. In a structured P2P network, each node generates a fixed ID according to a certain method, and the ID is associated with the node location to generate routing information. Generally, a distributed hash table (Distributed Hash Table), and each resource is precisely placed on a certain node, and the mapping relationship between the resource ID and the node position where the resource is located is provided, so as to ...

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Problems solved by technology

[0004] Aiming at the problem of resource retrieval that only supports exact keyword matching in structured P2P networks, the existing improved technology is generally: publish all keywords of resources to build index information, and summarize the results retrieved by multiple keywords when querying Screening, this method leads to retrieval of a large number of useless results and increases network communication consumption. An improvement method in this technology is to query keywords in sequence, and pass the query results to the next keyword index node, and the next keyword The index node searches for the result set that matches this keyword in the query results. This method reduces the consumption of network communication, but increases the processing of nodes and prolongs the query time

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