P2P stream media data request method

A data request and streaming media technology, applied in data exchange details, data exchange network, digital transmission system, etc., can solve problems such as ineffective use of data resources, unreasonable allocation of bandwidth, etc., and achieve the effect of reducing impact and speeding up arrival speed

Inactive Publication Date: 2009-06-17
INST OF ACOUSTICS CHINESE ACAD OF SCI
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  • Abstract
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Problems solved by technology

[0004] In order to overcome the defects in the prior art that data resources cannot be effectively utilized and bandwidth cannot be reasonably allocated, the present invention proposes a P2P streaming media data request method

Method used

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  • P2P stream media data request method

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Embodiment Construction

[0025] A method for requesting P2P streaming media data provided by the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0026] figure 1 It shows the structure of P2P streaming media network. The data source server provides the data source for the live streaming media. The nodes that join first connect directly with the data transfer server to obtain streaming media data and provide data information for the nodes that join later.

[0027] figure 2 Shows the process of nodes joining the P2P network, user node A (hereinafter referred to as node A) joins figure 1 In the P2P live broadcast network shown, node A first connects to the index server in this area, that is, index server 1 shown in the figure, and index server 1 selects the network distance closest to the existing network nodes according to the IP address of node A and broadcasts The list of nodes with similar positions is returned to node A. ...

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Abstract

The invention provides a P2P stream media data request method, which aims at P2P network heterogeneous nature, and does relative data request to different nodes according to bandwidths of different nodes. The method comprises doing data request and wheel block assignment to each inlet node according to the detecting circumstance to the bandwidth of each inlet node when in initializing and the size of the priority of a data packet which needs to request by a user node, accelerating the reaching speed of data, simultaneously reducing the influence brought by single-point fault, flexibly adjusting the size of a continuous request data block on a data request terminal, asking for the newest data packet more quickly, combining a packet lost detection retransmission mechanism, and reaching the purpose of smoothly playing.

Description

technical field [0001] The present invention relates to the technical field of computer network streaming media, and more specifically, the present invention relates to a P2P streaming media data request method. Background technique [0002] Data request allocation is a key technical issue in the field of P2P streaming media technology. According to the allocation granularity, the data request allocation methods used in the P2P streaming media system are mainly divided into two categories, which are coarse-grained allocation based on the data layer and fine-grained allocation based on data packets. Among the coarse-grained distribution methods based on the data layer, the data distribution method based on Multiple Description Coding (MDC) is mainly used. The method uses an independent multicast tree for transmission of each multiple description coded substream. Selecting to join multiple multicast trees can adapt to the heterogeneity of nodes. However, the efficiency of mul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/56H04L1/00H04L12/18H04L29/08
Inventor 王劲林苏少炜鲁逸峰冯侦探任浩苏杭
Owner INST OF ACOUSTICS CHINESE ACAD OF SCI
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