Cost optimization-based P2P streaming media coverage network topology structure adjustment method

An adjustment method, streaming media technology, applied in the transmission system, electrical components, etc., can solve the problems of reducing the quality of streaming distribution services, not considering the survival time of nodes, not considering the cost of traffic, etc.

Inactive Publication Date: 2011-03-30
WUHAN UNIV
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  • Abstract
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Problems solved by technology

The above topology optimization methods only consider improving the performance of the application layer system, but do not consider the traffic cost caused by the application layer system to the underlying physical network. This traffic cost will continue to increase as the system scale increases.
At the same time, the overlay topology construction method purely based on bandwidth and delay does not consider the survival time of nodes, and the selected nodes may have strong dynamics, which leads to the instability of the application layer system and seriously damages the distribution of video streams. continuity, thereby reducing the service quality of stream distribution

Method used

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  • Cost optimization-based P2P streaming media coverage network topology structure adjustment method
  • Cost optimization-based P2P streaming media coverage network topology structure adjustment method
  • Cost optimization-based P2P streaming media coverage network topology structure adjustment method

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Embodiment Construction

[0060] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings and examples.

[0061] According to the existing P2P streaming media technology, a typical P2P streaming media system includes several known index servers with fixed IP addresses, which provide other online user list information and streaming media server IP address information for the user hosts that initially join the system , and at the same time, it is used to periodically receive the heartbeat message sent by the user host and maintain the global user view. Several video source servers are used for segmented distribution of video content. A user watching a certain video file forwards the received video content to other users while watching the video as the service object. Generally, all video source servers are regarded as a virtual one, which is equivalent to building a cluster of video source servers, and they appear as one on time. figure 1 Acco...

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Abstract

The invention provides a cost optimization-based P2P streaming media coverage network topology structure adjustment method. In the method, the dynamism and isomerism of nodes are fully considered, the topology information of nodes, link delay between the nodes and available uplink bandwidth of the nodes are utilized, high-capacity nodes are greedily selected from alternative nodes to serve as service nodes by calculating the weight of the link between the nodes and the capacity value of the alternative nodes. Meanwhile, due to an adaptive topology adjustment method for periodically and continuously adjusting nodes with high bandwidth and long survival time to be close to a video source, the nodes in the network can gradually learn the network status and continuously optimize the system performance. A coverage network topology constructed by the method can improve the data diffusion speed, ensures the stability and continuity of streaming distribution, and effectively reduces the flow cross operators.

Description

technical field [0001] The invention relates to the technical field of P2P streaming media, in particular to a method for adjusting the topology structure of an overlay network. Background technique [0002] Combining P2P (peer-to-peer, also known as peer-to-peer) technology with streaming media applications is one of the current academic and industrial research hotspots. P2P streaming media technology consists of two parts: overlay network topology and data scheduling. Overlay network topology refers to how to find neighbor nodes, so that an application layer network is organized; Then stream media transmission. Therefore, the overlay network topology structure is the basis of data scheduling. At present, the overlay network topology in the P2P streaming media technology is mainly tree and mesh. Literature [1] analyzed and compared the two structures of mesh topology and multi-tree topology, and pointed out that the mesh topology can use the network bandwidth more effect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/08H04L29/06
Inventor 胡瑞敏杨红云陈旭辉陈军
Owner WUHAN UNIV
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