Cache placement method and device in D2D network

Abstract

The embodiment of the invention provides a cache placement method and device in a D2D network. The method comprises the following steps: acquiring contact duration and interval contact duration of a user, equally dividing a file into a plurality of file blocks, and transmitting the file blocks according to a preset rule to obtain the average number of the file blocks acquired from an adjacent userand the average number of the file blocks acquired from a base station; obtaining the transmission cost, and obtaining the average network consumption cost and the average file transmission delay according to the transmission cost, the contact time length, the interval contact time length, the average file block number obtained from the adjacent user and the average file block number obtained from the position of the base station; and performing resource allocation according to the network average consumption cost and the file average transmission delay to obtain a cache placement set. According to the cache placement method and device in the D2D network provided by the embodiment of the invention, a file cache placement scheme based on minimum average consumption cost is designed, and the problem of sharp increase of a mobile internet video service in a mobile scene of a user terminal is solved.

Description

technical field [0001] The present invention relates to the field of network storage resource allocation, in particular to a cache placement method and device in a D2D network. Background technique [0002] With the popularization of smart phones and the development of mobile Internet, wireless data traffic has exploded in recent years. Communication services have also changed from traditional voice and SMS services to emerging services with large capacity and low latency such as live video, online games, augmented reality, and virtual reality. [0003] To cope with the pressure of explosive growth in mobile data traffic, the ultra-dense cell network architecture can improve network capacity by reducing the coverage radius of each cell, deploying multiple base stations densely, and increasing the frequency reuse factor. Although this solution can increase the peak rate of the air interface of the wireless network, it brings great load pressure on the backhaul link of the ne...

AI Technical Summary

Problems solved by technology

However, the mobility of users in D2D networks will increase the chance of communication between users, thus affecting the cache placement strategy of user terminals

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