Safety communication method and device

Abstract

The invention discloses a safety communication method and device. The method comprises the following steps: establishing a mathematical model for signal transmission under multi-cell multi-user scene in advance; computing the mathematical model in a signal to interference noise ratio threshold value range of the user communication safety by use of an alternating direction multiplier algorithm to obtain an optimal wave beam forming parameter and artificial noise parameter; determining a signal needing to be transmitted according to the wave beam forming parameter and artificial noise parameter, and sending the signal to the user, wherein an interference signal comprises intra-cell interference signal and inter-cell interference signal. On the basis of considering the inter-cell interference signal, the optimal wave beam forming parameter and artificial noise parameter are obtained by use of the alternating direction multiplier algorithm, and the additional communication cost can be avoided. Visibly, based on the artificial noise and optimized wave beam forming technology, the inter-cell interference is considered in safety communication under the multi-cell multi-user scene, the communication energy consumption is lowered, the user service quality is improved, and the communication safety risk is lowered.

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...

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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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