Collaborative node selection method based on P2P VoD

Abstract

The invention discloses a collaborative node selection method based on P2P VoD and aims at a problem that the current node selection algorithm based on P2P VoD cannot both consider effective utilization of resources and improvement of QoS. The method adopts two stages to select nodes through different algorithms. During a first stage, a water injection method is introduced to carry out optimization in order to realize preliminary screening of nodes; and during a second stage, a fuzzy mathematic theory is adopted to evaluate QoS performance of the nodes obtained through screening in the first stage based on various indexes and then node selection is carried out. The method adopts the two-stage node selection strategy, various factors are effectively considered, and especially the bandwidth resources are more effectively utilized through the preliminary screening of the nodes during the first stage. Through introduction of a fuzzy evaluation mechanism, various factors capable of affecting the QoS are comprehensively considered, so that the requirements of a user for QoS of a P2P VoD system can be better satisfied.

Description

technical field [0001] The invention belongs to the field of signal processing and multimedia communication, and in particular relates to a coordinated P2P-based VoD node selection strategy. Background technique [0002] In recent years, with the development of multimedia communication, VoD (Video on Demand, video on demand) provides rich user experience for users. Based on the improvement of users' requirements for QoS (Quality of Service) and the increase in the number of users, the traditional VoD system in the C / S (Client / Server) mode is far from meeting the current needs. The rise of P2P (Peer-to-Peer) technology provides a feasible solution for the large-scale application of VoD system. [0003] Nevertheless, there are still many problems to be solved in the research of P2P VoD system. How to improve the balance of the system, the fairness of node selection and the utilization of spectrum resources are all important technical issues. Invention CN102984279A proposes a...

AI Technical Summary

Problems solved by technology

[0005] The present invention improves on the disadvantage that the traditional node selection strategy based on P2P VoD system cannot realize the QoS expected by users. Considering that the factors affecting system QoS are relatively complex, a two-stage node selection strategy based on P2P VoD is proposed

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