Self-adaptive P2P (Peer-to-Peer) steam media data piece selection method and node

Abstract

The invention relates to a self-adaptive P2P (Peer-to-Peer) steam media data piece selection method and a node. The method is carried out based on collaborative nodes in a P2P network; the collaborative nodes contain data pieces requested by the current node for scheduling. The method comprises steps of: estimating the priority of each data piece to be requested of the first node; obtaining the total priority of each data piece to be requested by the first node according to the proportional relation among the data pieces based on the priority, and sequencing all data pieces according to the total priority; selecting a plurality of previous continuous data pieces to be requested in the current scheduling period by the first node according to the sequence of the total priority, and requesting; and then providing the data piece selected as the server requested to adjacent nodes or media, wherein the first node is the node for sending a request on the steam media data piece to the collaborative adjacent nodes. The priority of the data piece includes the sequence scheduling priority, the rare scheduling priority, and the random scheduling property of the data pieces, which are calculated to obtain the final priority of the data pieces.

Description

technical field [0001] The present invention relates to the technical field of computer network, and more specifically, the present invention relates to an adaptive P2P streaming media data slice selection method and node. Background technique [0002] In recent years, with the rapid development of broadband communication and multimedia technology, various Internet applications such as online live broadcast, video on demand, and file download have emerged as the times require. New challenges, as the scale of users increases, the traditional client / server (C / S) model service system needs to consume more hardware and software resources, which can no longer meet the needs of large-scale users, so P2P-based services The system develops rapidly and gradually becomes a relatively mature application. [0003] From a functional point of view, a P2P system generally consists of two types of logical layers: 1) Overlay Layer, which mainly describes how nodes are organized in the P2P s...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the defects of each requesting node only considering its own state or the state of its neighbor nodes at the time of node request when the cooperative nodes in the P2P streaming media system of the prior art select data slices in scheduling, resulting in The data request of the node cannot achieve the expected effect and is not conducive to the improvement of the overall playback quality, so as to provide an adaptive P2P streaming media data piece selection method and node

Images