Centralized block switching P2P (peer-to-peer) file sharing system and service method thereof

Abstract

The invention provides a centralized block switching P2P file sharing system and a service method thereof. The file sharing system comprises a plurality of nodes and a server, wherein the nodes periodically provide the local trust values of the nodes to the server; the server is used for receiving the local trust values provided by the nodes and gathering the local trust values to compute the overall trust values of the nodes, and differentiated service is provided for the nodes according to the overall trust values. The invention not only enables the centralized block switching P2P file sharing system to effectively restrain the selfish behaviours and the swaying behaviours of the nodes to improve the robustness of the system but also can effectively reward high-contribution nodes to enable the high-contribution nodes to obtain higher downloading speed and improve the fairness of the system.

Description

technical field [0001] The present invention relates to the technical field of P2P file transmission, and more specifically, the present invention relates to a centralized block exchange P2P file sharing system and a service method thereof. Background technique [0002] The centralized block exchange P2P file sharing system is mainly composed of a server and a client. The server establishes a centralized index for the shared files in the system, and releases information of other clients to the client, so that the client can establish a point-to-point connection, which breaks through the The performance bottleneck of the traditional C / S mode. figure 1 The operation process of the centralized block exchange P2P file sharing system: step 1, the client periodically sends a registration message to the server, and registers its own IP address, port number and other information on it; step 2, the server receives the registration message from the client After the message, randomly ...

AI Technical Summary

Problems solved by technology

In the incentive mechanism based on local trust value, nodes provide upload services based on the local trust value of other nodes, but the local trust value cannot accurately represent the actual contribution of the node; The trust value evaluation is relatively accurate, but the mechanism still has the following problems: First, the mechanism does not consider the performance overhead of the system, and each calculation of the global trust value will lead to iterations in the entire network, and the number of network nodes will increase. In the case of , the computational overhead will lead to a decrease in network performance. Therefore, this mechanism lacks engineering feasibility and cannot be deployed in an actual P2P file sharing system; secondly, this mechanism is based on a structured P2P network and cannot be directly applied to Centralized block exchange P2P file sharing system

Images