ISP-friendly distributed service node selection and update method

Abstract

The invention provides an ISP-friendly distributed service node selection and update method. In the method, the topology information of nodes and the preset node selection priority are fully utilized; node weights are calculated according to the topology information of the nodes, and are sorted from large to small; a plurality of resource service nodes with larger weights are selected according to the stream distribution rate requirement and the list node available bandwidth condition, and connection detection is sent; finally the topology awareness is realized, the selection of the resource service nodes ensuring the stream distribution service quality is realized, and the traffic spanning operators is effectively reduced; meanwhile, a biased chat mechanism is started to periodically update local neighbor node list and the resource service nodes, the adverse effect caused by single-point invalidation of the concentrated update method is avoided, the communication pressure brought to portal server query is reduced, and the system has higher expandability.

Description

technical field [0001] The invention relates to the technical field of P2P streaming media, in particular to a method for selecting and updating distributed service nodes. Background technique [0002] P2P (peer-to-peer network) streaming media technology is the combination of P2P technology and streaming media applications, and it is a research hotspot in the current academic and industrial circles. The data distribution topology based on the mesh network has become the mainstream mode of P2P streaming media stream distribution due to its good scalability, adaptability to node dynamics and robustness. In the flow distribution mode of the mesh network, when a new node joins the system, through a centralized or distributed resource search mechanism, the new node can obtain a set of other node information that has the resources required by the node, and the system will The set decision strategy selects some active nodes as the resource service nodes of the new node, and obtai...

AI Technical Summary

Problems solved by technology

However, the centralized resource service node query method adopted by the above method will be affected by a single point of failure. At the same time, a large number of centralized queries reduce the scalability of P2P applications and bring huge communication pressure to the tracking server or Oracle server.

At the same time, the resource service node selection method does not consider the quality of service (QoS) of P2P stream distribution. In applications with high real-time requirements such as streaming media stream distribution, local congestion may occur between topologically adjacent nodes, resulting in decline in service quality

[0005] The academic community also has some research on the selection method of distributed resource service nodes [4], but the proposed method simply uses static information such as node geographic location as the basis for weight calculation, and does not take into account the adverse effects of dynamic changes in node bandwidth on the quality of stream distribution. influences

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