A secure and energy-efficient method for cognitive d2d communication

Abstract

The invention relates to a safe and energy-efficient cognitive D2D communication method. Small cell base stations and cognitive users conduct channel quality assessments respectively; establish a joint resource allocation model regarding wireless charging power and wireless charging time; and use an iterative optimization algorithm to calculate the optimal Resource allocation results; transmit radio frequency signals with optimal wireless charging power; cognitive users collect radio frequency signal energy within optimal wireless charging time; small cell base stations interfere with eavesdroppers with optimal wireless charging power, and cognitive users set their own maximum feasible transmit power, and conduct cognitive D2D communication. The invention is oriented to ultra-dense small cell networks. It utilizes cognitive radio technology to realize spectrum sharing and uses energy collection technology to wirelessly charge cognitive users. At the same time, it interferes with eavesdroppers through artificial noise, thereby achieving safe and energy-efficient recognition. Intelligent D2D communication can effectively improve spectrum efficiency, energy efficiency and physical layer security.

Description

technical field [0001] The present invention relates to wireless communication technology, in particular to a safe and energy-efficient cognitive D2D communication method. Background technique [0002] The scarcity of spectrum resources and the continuity of energy supply have always been important challenges faced by wireless communication systems. Therefore, academia and industry have always been committed to improving the spectrum efficiency and energy efficiency of wireless communication systems. Ultra-dense networks (Ultra-Dense Networks) and device-to-device communication (Device-to-Device, D2D), as an effective method to improve spectral efficiency and network capacity, and reduce terminal energy consumption, have become the fifth generation (5G) mobile communication The key technology of the system. The so-called ultra-dense network is to make the network dense by deploying a large number of small cell base stations (Small Cell Base Station, SCBS). In this way, on ...

AI Technical Summary

Problems solved by technology

Traditional physical layer security methods for wireless communication systems only consider one aspect of spectrum efficiency or energy efficiency, and lack applicability to ultra-dense cellular networks, making it difficult to ensure interference-free spectrum sharing and secure communications

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