A content-centric network-based domain collaborative caching method and device

Abstract

The content-centric network-based domain collaborative caching method and device provided by the present invention caches data in a certain collaborative area by adopting a collaborative caching method, fully utilizes the cache space of non-path nodes in the collaborative domain, and at the same time, the collaborative area only caches One copy reduces data redundancy, makes full use of hardware resources in the network topology, and adopts a reasonable cooperative caching strategy to achieve the purpose of improving the cache hit rate, reducing the number of routing hops, and reducing the request delay. Reduce network congestion while reducing pressure, and provide better data services for network users in CCN.

Description

technical field [0001] The present invention relates to the field of content-centric networks, in particular to a method and device for domain collaborative caching based on content-centric networks. Background technique [0002] Compared with the traditional host-centric connection-oriented network model, CCN pays more attention to the content requested by the user, and uses the naming of the content as a symbol of network transmission instead of the current IP address. And change the transmission mode from "push" to "pull", take the user's will and request as the driving factor of information transmission, and directly use the name of the content to carry out routing transmission and positioning of data, etc., in line with the needs of current users. In CCN, the most important feature is to support node caching, cache data on the relevant routing nodes, and when the same request is sent, the node will respond directly without sending it to the server, so as to reduce the u...

AI Technical Summary

Problems solved by technology

[0004] In CCN, the choice of caching strategy will directly affect the communication quality, and most of the current caching strategies are in the research stage, and the strategies that have been implemented are relatively weak in terms of data redundancy processing and request delay reduction. Therefore, the present invention The main purpose of CCN is to improve the cache efficiency of CCN, improve the data hit rate and reduce the request delay by fully considering the communication topology and the dynamic adjustment of user requests

[0005] At present, the centralized path caching strategy is mainly adopted in CCN, and the data is cached on the routers through which the data packets pass. As a result, there will be many copies of the same data in the network, and only the nodes closest to the user request cache the data. It will be accessed by users, and a large number of remote copies become redundant information, wasting storage space. After relevant optimization, caching data on only some of the nodes will lead to low hit rate and frequent replacement of core node data.

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