CCN content caching method based on popularity statistics

Abstract

The present invention provides a CCN content caching method based on popularity statistics, including: when an access node receives a content request sent by a user terminal, determine the access node and the intermediate node or intermediate node with the first content cached according to the content retrieval policy A request forwarding path between access nodes; the request forwarding path has a minimum delay; the first content is the content corresponding to the content request. The present invention uses local popularity information to carry out content retrieval strategy, and places hotter content closer to the access router, thereby reducing user download delay; according to the content retrieval strategy of each node on the path, redundancy is reduced, and the content is increased. Cache diversity is improved, and the overall resource utilization of the network is improved; at the same time, cache decision-making and multi-path routing requests are jointly considered to improve cache utilization.

Description

technical field [0001] The invention relates to the technical field of the Internet, in particular to a CCN content caching method based on popularity statistics. Background technique [0002] With the rapid development of network applications such as WWW (world wide web) and peer-to-peer (P2P, peer to peer) characterized by "content / information sharing", "content" has actually played a core role in the Internet. character of. In order to cope with the challenges brought about by the rapid growth of Internet data traffic and the number of users, and to fundamentally solve many problems in IP networks, related research has proposed a revolutionary network architecture called Content Centric Network (CCN). The architecture will change from an IP content-oblivious network to a content-oriented network. The cache will replace the buffer in the router and become the inherent infrastructure of the future network, that is, the embedded Caching (In-network Caching). [0003] In C...

AI Technical Summary

Problems solved by technology

[0010] The main goal of the EMC strategy is to reduce the traffic between ISP domains. Therefore, the result of its cache placement is that the higher the cache hit rate in the ISP domain, the better. Lower content, but the result is that the number of hops for users to obtain hotter content increases, and the content download delay is greater

[0011] The Breadcrumbs method combines content placement and request routing, and uses the stored trail information to guide the routing and forwarding of subsequent requests. However, this method requires each node to cache trail information for each file, and the information overhead is too large.

In addition, Breadcrumbs adopts the LCE placement strategy, and the nodes that forward content packets along the way will cache copies of the content, increasing the redundancy of network content

Moreover, due to dynamic replacement, there is a risk that the content cannot be found from the downstream path when using this algorithm.

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