Edge routing node and method for prefetching content from multisource by edge routing node

Abstract

The invention relates to method for prefetching content from multisource by an edge routing node of a content central network and the edge routing node. The method includes: judging whether a data packet arrives the first time or not; if so, inquiring whether the node caches corresponding contents or not; and if not, judging whether the contents satisfy conditions for starting multisource prefetching or not, and if so, performing multisource prefetching. The multisource prefetching includes: inquiring which routing nodes caches the contents, by the edge routing node, parallelly acquiring different blocks of the contents from a content source server of the content central network and routing nodes cached with the contents. Multisource prefetching is started on the basis of size of contents, parallel prefetching proportion is set on the basis of available link bandwidth, route path of newly increased routes fields can be appointed, utilization efficiency of network resources is improved, and distribution and acquisition efficiency of contents are improved.

Description

technical field [0001] The invention relates to the field of content acquisition of a content-centric network, in particular to an edge routing node and its method for prefetching content from multiple sources. Background technique [0002] At present, Internet technology and applications are developing rapidly, and broadband and content have become the main theme of Internet development. It is predicted that IP traffic will grow at a compound annual growth rate of 34%, and by 2015 the global IP traffic will reach 80.5EB per month. At the same time, all content-related traffic on the Internet will account for more than 97.5% in 2015. At present, solutions to meet the needs of large-scale content distribution in the Internet in the future mainly include P2P (Peer-to-peer) technology, content caching technology, content distribution CDN technology and content-centric network CCN technology. [0003] For content caching technology, there is a prefetching strategy to cache con...

AI Technical Summary

Problems solved by technology

However, due to the expensive lookup memory and high power consumption that high-speed forwarding devices rely on, the supported routing table capacity is limited, and fine-grained content scheduling cannot be performed. The content cached by each edge node is often scattered and difficult to be accessed by other edge nodes. use

In addition, in the CCN network, data packets are forwarded centered on the content. Interest packets of the same content can only be transmitted along one path. It is difficult for users to download files from multiple data sources at the same time, and the efficiency is not high.

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