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Utility optimal collaborative cache management method under CDN-P2P hybrid architecture

A CDN-P2P, hybrid architecture technology, applied in the field of streaming media and network technology, can solve problems such as long service time

Active Publication Date: 2021-09-28
GUILIN UNIV OF ELECTRONIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Many existing fixed terminal devices (desktop computers, TV sets, etc.) have a disk buffer, which can store and save videos for a long time, which makes the service time of some popular videos longer

Method used

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  • Utility optimal collaborative cache management method under CDN-P2P hybrid architecture
  • Utility optimal collaborative cache management method under CDN-P2P hybrid architecture
  • Utility optimal collaborative cache management method under CDN-P2P hybrid architecture

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Embodiment

[0061] figure 1 It is a CDN-P2P hybrid flow architecture diagram of the present invention, which is composed of video source server, tracking server, edge CDN node, super node (special user node), and common node (user node). The video source server first distributes the video to the edge CDNs nodes in different ISPs, and then the edge CDNs nodes distribute the videos to common nodes. The architecture includes two layers of overlay network, one is an overlay network organized by CDNs nodes, and the other is an overlay network composed of super nodes.

[0062] The super node group is composed of some fixed terminal nodes (fixed nodes) with good performance. The fixed nodes have a disk cache area that can be used to store resources for a long time, and a shared area that can be used to share resources with neighbor nodes and play the cache area for Play the requested resource. Each super node is both a request node and a service node. It keeps a neighbor node information list ...

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Abstract

The invention discloses a utility optimal collaborative cache management method under a CDN-P2P (Content Delivery Network-Peer-to-Peer) hybrid architecture, which comprises the following steps: firstly, constructing a super node group, supporting the combination of a P2P technology and a content distribution network, and providing services for other nodes by utilizing the characteristics of high expandability and low deployment cost of a P2P overlay network; secondly, according to a resource supply-demand relationship between ISPs domains, constructing a corresponding mathematical model based on the global utility value, and optimizing the model by using a resource allocation greedy algorithm; and finally, designing a collaborative cache management method based on a utility optimal model, and placing video resources with high popularity close to a user side through collaborative cache among nodes in the super node group and collaborative cache between the super node group and CDNs nodes based on the uploading bandwidth of the sending node, the downloading bandwidth of the receiving node and the disk capacity. Therefore, the backhaul link flow between ISPs is reduced, and the playing fluency and the cache hit rate of the user are improved.

Description

technical field [0001] The invention relates to the fields of computer network, peer-to-peer network technology, and streaming media technology, in particular to a utility-optimized cooperative cache management method under a CDN-P2P hybrid architecture. Background technique [0002] Network video is one of the main applications of the Internet, and it is also one of the main traffic sources in the network. The user scale is huge and growing, and the huge user scale will generate huge bandwidth costs. In recent years, HTTP Adaptive Streaming Media Technology, referred to as DASH, combines the advantages of traditional Real Time Streaming Protocol (Real Time Streaming Protocol, RTSP) / (Real Time Protocol, RTP) technology and HTTP progressive download technology. Due to its simple deployment and easy expansion, it is widely used. Representative products for commercial deployment include Microsoft's Smooth Streaming (SS), Apple's HLS (HTTP Live Streaming, HTTP live streaming), ...

Claims

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Application Information

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IPC IPC(8): H04N21/231H04N21/218H04L29/08
CPCH04N21/23106H04N21/23113H04N21/2181H04L67/1097H04L67/104H04L67/5682H04L67/568
Inventor 刘平山刘韶星孙业民俞中舒黄桂敏
Owner GUILIN UNIV OF ELECTRONIC TECH
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