ICN cache strategy based on node community importance

Abstract

The invention discloses an ICN cache strategy based on node community importance. The ICN cache strategy includes the steps of: 1) defining node community importance; 2) determining a content cache position based on the node community importance; and 3) adopting a node content replacing mechanism based on the node community importance. The invention provides a cache strategy which applies a community characteristic of an Internet network topological structure, and determines the content cache position and performs cache replacement based on importance of each node in a community the node belongs to. Simulation experiments are carrier out in different network environments, and experimental results verify effectiveness of the method provided by the invention.

Description

technical field [0001] The invention belongs to the technical field of electronic information, and relates to a mechanism for selecting a cache location of a content object and a mechanism for replacing a content object in a network node in an information center network architecture. Background technique [0002] In order to adapt to the transformation of Internet applications from the end-to-end communication mode driven by the sender to the mass content acquisition mode driven by the receiver, and at the same time enhance the network's support for security, service quality, mobility, scalability, etc., the researchers In recent years, a new type of information-centric network architecture has been proposed, collectively referred to as Information-Centric Networking (ICN), typical examples are: DONA CCN / NDN, PURSUIT, COMET and GreenICN projects. In this type of ICN network, in order to alleviate the severe pressure on the network bandwidth caused by the current rapid growth...

AI Technical Summary

Problems solved by technology

However, if in the whole network, all nodes are based on the frequency of content access at the node or the time sequence of access, and adopt the same replacement mechanism, it will directly lead to unreasonable distribution of content objects in time

That is, during popular time, each node in the community caches the same object, which will not be conducive to the rational utilization of cache space

However, after the popular time passes, the content object disappears on each node almost at the same time. If the content needs to be accessed, a relatively large network delay will be generated, which will inhibit the overall performance of the network.

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