A content caching method for content center IoT network

Abstract

The present invention proposes a content caching method for a content-centric Internet of Things network, which includes the following specific steps: S1, the cache spaces of network nodes are all in an idle state, and p cache spaces with the size of cache content are divided as areas to be sinked, It is recorded as the D area, and the remaining space is regarded as the remaining area, which is recorded as the R area; S2. Calculate the change rate ΔE of the expected income of all the cached content cached by the network nodes, and cache the data according to the order of the change rate ΔE of the expected income from large to small The content is allocated into the R zone or the D zone. The cache content is allocated to the R zone first, and the content exceeding the size limit of the R zone is allocated to the D zone. If there is content produced by its own node in the D zone, the cached content will be deleted; and if If the cache content allocated into the D area exceeds its space size limit, the excess cache content will be deleted. The invention can provide faster content request response, improve the effective utilization rate of cache space, and reduce the energy consumption of the whole network at the same time.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a content caching method for a content-centric Internet of Things network. Background technique [0002] With the rapid development of the Internet of Things technology, the number of devices in the Internet of Things is growing explosively, and the application scenarios of the Internet of Things have continuously penetrated from individually deployed industrial scenarios to personal and commercial applications. Relevant forecast data show that the number of active IoT devices worldwide will exceed 20 billion by 2025. How to realize the interconnection of massive IoT devices and the efficient distribution of content information poses a serious challenge to the unified IoT architecture system. Compared with the core network, the network element equipment of the Internet of Things is usually resource-constrained, and it is very limited in computing power, storage sp...

AI Technical Summary

Problems solved by technology

The existing content caching method will cache different versions of content information indiscriminately, and cannot timely and effectively clean up the effective content that does not meet the user's freshness requirements

Therefore, the existing CCN content caching methods cannot provide better caching performance in IoT scenarios

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