A method and device for secure communication

Abstract

The invention discloses a method and device for safe communication, which pre-establishes a mathematical model of signal transmission in a multi-cell multi-user scenario; uses an alternate direction multiplier algorithm to calculate the mathematical model within the threshold range of signal-to-interference-noise ratio for user communication security, Obtain optimal beamforming parameters and artificial noise parameters; determine the signal to be transmitted according to the beamforming parameters and artificial noise parameters, and send the signal to the user; wherein, the interference signal includes intra-cell interference signal and inter-cell interference Signal. On the basis of considering inter-cell interference signals, the optimal beamforming parameters and artificial noise parameters are obtained by using the alternating direction multiplier algorithm, which can avoid additional communication costs. It can be seen that this application is based on artificial noise and optimized beamforming technology. In the multi-cell multi-user scenario, the interference between cells is considered during secure communication, which reduces communication energy consumption, improves user service quality, and reduces communication security risks. .

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a method and device for secure communication. Background technique [0002] With the development of wireless communication technology, the era of fifth-generation mobile communication technology is coming. The fifth-generation mobile communication technology focuses on green channels and improving spectral efficiency. The means to achieve green channels include improving energy utilization efficiency and reducing energy consumption, and the means to improve spectral efficiency include cooperative relay technology and cooperative beamforming technology. , network coding technology, etc. [0003] When transmitting signals using wireless communication technology, it is essential to ensure secure communication. Secure communication may refer to ensuring that the transmitted signal is not eavesdropped by unauthorized users by some means during signal transmission. The signal r...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for secure communication, which aims to solve the existing problem that the inter-cell interference is not considered in the security communication; another purpose of the present invention is to provide a device for secure communication, which Consider the existence of inter-cell interference during secure communication, thereby reducing communication energy consumption, improving user service quality, and reducing communication risks

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