A Cache Coordination System Based on Cache Role Division

Abstract

The invention discloses a cache synergetic system based on cache role definition. The cache synergetic system based on cache role definition divides network nodes into access layer nodes and core layer nodes; the access layer nodes are close to a served user and independently conduct cache decision and replacement according to the traditional cache replacement algorithm; the core layer nodes serve as a logic whole, work in a synergetic mode and are used for improving the cache variety of the whole cache network. When a request for some content reaches the access layer nodes, the cache of the access layer nodes is inquired firstly; if the content exists in the cache, the cache content is directly returned; if the content does not exist in the cache, the content is inquired in the core layer cache nodes; if the content exists in the core layer cache nodes, the request is met; if the content does not exist in the core layer nodes either, the access layer nodes transmit the request to a network operator or a content provider according to an FIB table finally. The cache synergetic system based on cache role definition can effectively reduce network flow and improve user experience.

Description

technical field [0001] The invention relates to a cache coordination system based on cache role division, and belongs to the technical field of network multimedia data transmission. Background technique [0002] At present, users' demand for the Internet is gradually changing from point-to-point communication to content acquisition. The traditional network architecture based on unicast routing has been difficult to effectively support massive point-to-point asynchronous content distribution. As a technology that adapts to point-to-point transmission, caching can effectively relieve the traffic pressure on the network. At present, both content providers and network operators tend to reduce network traffic and improve user experience by deploying ubiquitous caching systems. The content-centric network represented by NDN takes content caching as a basic element of the new network architecture. [0003] Under the background of ubiquitous and transparent cache, the traditional...

AI Technical Summary

Problems solved by technology

On the one hand, the caching system should try to improve the user experience. Therefore, it should try to cache highly popular content and push the content to the edge of the network, which will cause many copies of the highly popular content in the cache network, wasting Valuable cache resources; on the other hand, for content with low access frequency, the additional access cost should not be too high, so we should try to increase the diversity of the cache and reduce the frequency of the same content copy, but blindly increase the cache Diversity is difficult to guarantee the user experience of high-frequency content access

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