Precise cache placement method based on network topology layering

Abstract

The invention discloses a precise cache placement method based on network topology layering. The method comprises the following steps: transforming data packet structures of original interest packets and data packets in an ICN; adding a cache information record table in a router in the ICN network; adding a request information record table in an original edge router in the ICN; classifying the nodes by using a K-means algorithm according to the static information of the nodes in the network topology, and layering the network topology according to a classification result; further classifying the content popularity; and executing different cache placement strategies on different types of popular contents according to hit node types including server nodes and non-server nodes. According to the method, the content popularity is considered in detail, calculation is carried out in a lightweight mode, the overall cache hit rate in the network can be obviously increased under the condition of low cache resources, time delay is reduced, link loads are reduced, user experience is improved, and the method has a feasible practical value and a wide application prospect.

Description

technical field [0001] The invention relates to the field of content-centric networks, in particular to an accurate cache placement method based on network topology layering. Background technique [0002] The Internet is playing an increasingly important role in our lives, and according to the Cisco Annual Internet Report, the total number of Internet users will increase to 5.3 billion (66% of the global population) in 2023, up from 3.9 billion (66% of the global population) in 2018. 51%). The year-by-year growth of Internet users has brought a series of network problems. At present, although content delivery network (ContentDelivery Network, CDN) and peer-to-peer Internet (Peer-to-Peer, P2P) technologies can cache popular content to the edge of the network, to a certain extent alleviate the problems caused by mass content distribution. coming network problems. However, the content delivery mode of CDN and P2P is essentially a traditional network architecture based on TCP...

AI Technical Summary

Problems solved by technology

[0004] (1) The detailed application scenarios of the caching strategy are not fully considered;

[0005] (2) Did not fully consider the popularity of the content and study the location of the cache in detail

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