Method and system for constructing content topology

Abstract

The invention belongs to the technical field of wireless communication, and discloses a content topology building method. The method comprises the following steps: a base station does statistics of content storage of each mobile node, and establishes a content storage table for each mobile node; the base station locates each node, calculates the distance between every two nodes, and calculates whether a communication link can be established between every two nodes according to the distance and a path loss model; the base station calculates the node weight related to each mobile node according to the content popularity distribution and the content storage of each mobile node; the base station defines the content potential between every two nodes, and calculates the weight of the link between every two links according to the content potential; and a content topology is formed according to all the nodes within the coverage of the base station, the content stored in the nodes and the links between the nodes. The topological relationship of the mobile nodes, the content and the links between the nodes can be showed clearly, and the coupling relation relationship content storage and content transmission can be revealed clearly. The success rate of content transmission can be ensured and the efficiency of storage can be improved by controlling the content topology.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a content topology construction method. Background technique [0002] Caching content at the edge of the mobile network is a wireless communication technology full of development potential. Caching content at the edge of the network can shorten the distance between content and users, thereby reducing the load on the network and alleviating the bottleneck effect of the server. Device-to-device (D2D) communication technology has received great attention in recent years, mainly due to its near-field communication characteristics that can provide better throughput rates and better energy efficiency. Caching the content required by the user in the device node and sharing the content stored with each other through the D2D technology can improve the utilization rate of wireless resources while alleviating the network load. When storing content in a device, th...

AI Technical Summary

Problems solved by technology

The algorithm of Lin Zhang et al. ensures the efficiency of content sharing, but it does not consider the differences in the storage capacity of mobile device nodes and the differences in content requirements of nodes, so it cannot be applied to actual wireless network nodes, because the storage capacity of actual nodes and content needs are different

The algorithm of JingjieJiang et al. first stores the content according to the popularity, and then matches the node with the node with the highest transmission rate for content transmission, but it does not consider the mutual influence and coupling characteristics of content storage and content transmission, nor does it consider the possibility that the transmission link may be activated at the same time. The interference problem caused by this will cause the stored content to be transmitted without a suitable link, and the link that can be activated will perform invalid transmission because the nodes at both ends have no content difference, thus affecting the success rate of content sharing

[0003] To sum up, the problems existing in the existing technology are: the probability of content sharing between nodes is low, and the business load in the network is relatively large

The main reason is that when storing content, the impact of storage on wireless links is not considered, and the problem of mutual coupling between content storage and content transmission is not effectively solved

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