Self-aggregation cooperative caching method in CCN

Abstract

The invention relates to a content acquisition of router cache nodes and dynamic routing request method in a CCN. In the method, the CCN comprises a content server, an access routing node and a plurality of intermediate routing nodes; the access routing node comprises a competitive domain and a cached domain. The method comprises the steps that the access routing node receives a content request of a user; the requested content is acquired from the content server or a cached node through the intermediate routing nodes according to the content request; the requested content is cached in the competitive domain, the frequency of content requesting is tested and counted in a testing period, and the frequency of content requesting is added into a header domain of a frequency package of the requested content; according to the LFU algorithm, the content of which request frequency is larger than the minimum access frequency is cached in the cached domain; the content of which frequency is smaller than the minimum access frequency is pushed up from the access routing node to the intermediate routing nodes along the path, for returning to the content server, indicated by a routing list.

Description

technical field [0001] The invention relates to the technical field of router embedded cache in a content-centric network, in particular to a method for content acquisition and request dynamic routing of a router cache node in a content-centric network. Background technique [0002] Internet applications are undergoing a transition from a host-oriented point-to-point communication model to a content-centric communication model. Internet applications mainly revolve around the distribution and retrieval of content, that is, they are more concerned about the content itself. To this end, Content Centric Network (CCN) focuses on exploring the future network architecture centered on information or content. In-network Caching in CCN is the basic facility of each router. The router caches the data packets passing through it according to a certain strategy, and provides services for subsequent requests. [0003] The basic idea of ​​the network embedded cache is that the cache devi...

AI Technical Summary

Problems solved by technology

[0005] LCE (Leave Copy Everywhere) is the default cache decision strategy of CCN, that is, when the object is returned, all nodes along the way cache the copy of the object, but this method is easy to cause cache redundancy, that is, the same object is stored in multiple nodes at the same time There are copies, which reduces the diversity of content that the cache system can cache

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