Cache optimization decision-making method for ultra-density cellular and d2d heterogeneous fusion network

Abstract

The present invention proposes an ultra-density cellular and D2D heterogeneous fusion network cache optimization decision-making method, which includes: constructing a cellular and D2D heterogeneous fusion network architecture; predicting the popularity of multimedia content circulating in the network; receiving broadcast messages on the receiving intelligent terminal to form a D2D Resource sharing network; each user's smart terminal collaboratively caches accessed multimedia content; the user's smart terminal predicts the probability of content cached by each user's smart terminal in the cellular base station; the cellular base station counts the content in the cellular and D2D heterogeneous converged network Transmission delay: Based on the statistical content transmission delay in the cellular and D2D heterogeneous converged network, the service gateway performs caching optimization on the base station with the minimum content transmission delay as the goal, and obtains the final optimization decision of the cellular and D2D heterogeneous converged network. The present invention adds a content demand feedback mechanism between the terminal and the base station, further reducing the inter-layer cache redundancy between the D2D network and the cellular network.

Description

technical field [0001] The invention belongs to the technical field of ultra-density heterogeneous wireless communication networks, and specifically relates to an ultra-density cellular and D2D heterogeneous fusion network cache optimization decision-making method. Background technique [0002] With the rapid development of wireless communication technology, ubiquitous handheld smartphones and tablets access the Internet through mobile networks, triggering an explosive demand for video / audio streaming. This puts enormous pressure on current mobile networks. According to statistics, most of the traffic load in the network is caused by repeated transmission of some hot content. Caching the hotspot content at a local node, such as a cellular base station (Base Station, BS) or a mobile terminal device (Device), can effectively alleviate the network load. Especially designing an efficient content caching mechanism in a high-density heterogeneous network environment where Device...

AI Technical Summary

Problems solved by technology

However, in high-density D2D user scenarios, due to the short distance between users with caching capabilities, this strategy will generate a large amount of content redundancy in locally adjacent terminal devices, resulting in low utilization of terminal storage space.

In the cellular network, there is a lack of cache data sharing between base stations, resulting in a low degree of cache coordination and large cache redundancy between base stations.

Especially in the co-coverage environment of cellular and D2D networks, there is a lack of caching cross-layer cooperation between base stations and D2D devices, resulting in insufficient utilization of the entire network storage space

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