Distributed mobile node file caching method based on social relation in cellular network

Abstract

The invention discloses a distributed mobile node file caching method based on a social relation in a cellular network, and belongs to the field of wireless communication. After a mobile node meets a friend node (a one-hop social neighbor node) based on the social relation, the mobile node and the friend node transmit necessary files to each other, direct benefits and indirect benefits obtained by caching these files are calculated according to all files cached in the both parties to reallocate the caching schemes of the two nodes, wherein the direct benefits are system benefits of the two nodes by satisfying the demands of the respective friend nodes, and the indirect benefits are used for bringing larger opportunity for multi-hop social neighbor nodes to obtain the necessary files by direct communication through terminals so as to increase the direct benefits of other nodes. According to the distributed mobile node file caching method disclosed by the invention, the demands of the multi-hop social neighbor nodes are considered, so that the system obtains the maximum overall direct benefit. The distributed mobile node file caching method disclosed by the invention can be applied to node file caching methods in mobile cellular systems having caching functions and having the social relation.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a mobile node file caching method based on social relations in a cellular network system. Background technique [0002] In the past few years, with the popularization of handheld devices such as smart phones, the number of various wireless applications has also increased rapidly, accompanied by the explosive growth of data volume, which has caused a great burden on the cellular network, thus lead to poor service quality. How to meet people's increasing data service demands on limited bandwidth resources is a huge challenge in the field of wireless communications. [0003] In recent years, some traditional methods, such as increasing the spectrum bandwidth and micro-cell, have gradually approached the limit. People began to focus on traffic localization technology to reduce network load. At the same time, the terminal direct technology provides a communication method with ...

AI Technical Summary

Problems solved by technology

[0005] However, some mobile nodes in the cellular network cannot share files with other arbitrary nodes due to security and revenue considerations.

This makes it impossible for some nodes to obtain files on nodes with more distant cache relationships (multi-hop social neighbor nodes)

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