Peer-to-peer streaming media living broadcast system and data transmission method therefor

Abstract

The invention discloses a peer-to-peer streaming media living broadcast system and a data transmission method therefor. The system comprises a data source server, an index server, and a plurality of client nodes which are distributed in N horizontal levels. One or more data compensation servers are deployed in every horizontal level or many of the horizontal levels The client nodes in the first level acquire content data of a streaming media program from the data source server and provide the content data for the one or more client nodes in the second level, the client nodes in the kth level acquire the content data from the client nodes in the (k-1)th level and provide the content data for the one or more client nodes in the (k+1)th level, and the client nodes in the Nth level acquire the content data from the client nodes in the (N-1)th level. The client nodes acquire the content data from the corresponding data compensation server when the client nodes can not acquire the content data from the data source server or the client nodes in the previous level. According to the invention, source nodes of data required by nodes can be positioned quickly, network congestion is avoided, and network stability is improved.

Description

technical field [0001] The invention relates to communication technology, in particular to a peer-to-peer streaming media live broadcast system and a data transmission method therein. Background technique [0002] In the peer-to-peer (Peer-to-Peer, hereinafter referred to as: P2P) streaming media live broadcast system, the video and audio data are transmitted to each node in the P2P streaming media network in real time by means of streaming transmission using P2P technology In the process, these nodes can achieve the effect of playing streaming media programs in real time. In the prior art, the traditional P2P streaming media network structure mostly adopts a fully peer-to-peer mesh topology, that is, a network structure similar to the Bit Torrent protocol (Bit Torrent, hereinafter referred to as BT), or a network structure based on a centralized tree type. Topology. [0003] In the process of realizing the present invention, the inventor finds that when transmitting the c...

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Problems solved by technology

[0004] When transmitting the content data of streaming media programs in the P2P streaming media network with mesh topology, the nodes in the network need to search and query each piece of data, and it is impossible to quickly locate the source node of the data required by the node, and the operation and waiting time are relatively long. long; and, since the data in the live broadcast system is always rolling, the latest data will always appear on the data source server and certain specific nodes

Therefore, it often happens that a large number of nodes rush to the data source server and these specific nodes to try to obtain the latest data, resulting in excessive load on the data source server and these specific nodes, resulting in network congestion and affecting the normal streaming media business run;

[0005] However, the centralized tree-type topology structure is too delicate and requires a lot of resources to ensure the stability of the centralized tree-type topology structure. Once a node close to the root fails, it may cause a chain reaction, resulting in a large number of nodes in the network. Instability or even failure within a certain period of time

With the increase of network scale, the possibility of node failure in the P2P streaming media network based on the centralized tree topology gradually increases. When it reaches a certain level, the entire P2P streaming media network will be in a very unstable state. As a result, most nodes cannot obtain enough content data of streaming media programs in time to ensure the smooth playback of streaming media programs

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