Content-oriented network caching method

Abstract

The invention discloses a content-oriented network caching method. The method comprises the following steps that: a base station defines virtual communities and selects virtual community management nodes in each update period; the base station selects an independent set by using a network topology formed by the virtual community management nodes; the base station randomly selects a virtual community corresponding to the independent set for performing content caching; the base station informs the selected virtual community to perform content caching, and transmits content to a corresponding virtual community management node; the virtual community management node receiving a content caching instruction selects a node for caching the content by using a generalized dominating set algorithm; the virtual community management node informs the selected node to cache the content, and transmits the content to the node; and the selected node caches the content.

Description

technical field [0001] The invention relates to a wireless mobile network system management method, in particular to a content-oriented network caching method. Background technique [0002] Van Jacobson is the creator of the content-centric network CCN architecture and one of the main participants in the NDN project. In his article "Networking Named Content" published in 2009, he pointed out that "the content storage of CCN is similar to the working principle of the buffer memory in IP routers, but it follows a different replacement strategy. Since the IP data packet belongs to a specific point-to-point session, when forwarding After the next hop, it loses its value, so after the forwarding is completed, IP will immediately forget the packet and clear the buffer memory. Unlike IP, CCN content data can be used as potentially useful information to serve more customers (for example, multiple Users read the same e-newspaper or watch the same YouTube video). In order to maximize...

AI Technical Summary

Problems solved by technology

However, since the caching strategy along the path is proposed in the core network scenario, it is especially suitable for hierarchical networks and tree topologies, while the multi-hop relay cellular network has the characteristics of node equality and mesh topology, caching along the path cannot achieve content Copies are sinking, and the contribution to the improvement of content acquisition efficiency is limited

In addition, with the caching strategy along the path, the cached content copies radiate in a linear manner, and the path of the content copy cache is closely related to the location of the requesting user, and the distribution of content copies across the network is uncontrollable

Finally, caching along the path is triggered successively by user needs, and the benefits of content caching can only be realized through the accumulation of time, which is especially not conducive to the rapid distribution and deployment of hot content on the entire network

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