Probability cache content placement method based on content centrality

Abstract

The invention discloses a probability cache content placement method based on content centrality. The method comprises the steps that S100, a user sends an interest packet for requesting a content block to a network; S200, the interest packet is forwarded on the router in the network according to the shortest path; S300, after receiving the interest packet, the router in the network searches whether corresponding cache content exists or not, if yes, the step S400 is executed, and if not, the router records and forwards the cache content to a next hop router until the cache content is forwardedto a content source server; S400, a data packet containing the requested content block is returned and along a path opposite to the interest packet forwarding path is returned; and S500, when the data packet is transmitted back to the router with the caching function, a caching probability is calculated according to the content centrality and the content acquisition delay, and a decision is madeas to whether to cache the content of the data packet in the router according to the caching probability. According to the method, cache redundancy can be reduced, the cache utilization rate is improved, the content acquisition delay is reduced, and the network bandwidth pressure is relieved.

Description

technical field [0001] The disclosure belongs to the technical field of network caching, and in particular relates to a probabilistic caching content placement method based on content centrality. Background technique [0002] With the rapid development of the Internet, the traffic in the network is growing explosively, and users' acquisition of massive information has gradually become the core demand. However, the end-to-end communication mode of the traditional network can no longer cope with the huge pressure brought by the sharp increase in traffic. Therefore, the future network architecture has become a research hotspot. Among them, as a new type of network architecture system that is gradually recognized, information-centric networking (ICN, information-centric networking) represented by CCN / NDN, DONA, NetInf, etc. advocates an information-centric communication model instead of the traditional one. The host-centric communication mode can better adapt to the transformat...

AI Technical Summary

Problems solved by technology

However, this type of method tends to place cached content at the edge node, which will increase the competition of different content at the edge cache node, thereby reducing cache utilization

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