Secure transmission method and system based on air-based reconfigurable intelligent surface
A safe transmission and intelligent technology, applied in transmission systems, radio transmission systems, security devices, etc., can solve problems such as consuming a lot of computing resources, RIS cannot improve communication performance, and information transmission security cannot be well guaranteed. , to achieve the effect of saving computing resources and time, and improving the safe transmission rate
Active Publication Date: 2021-10-01
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology
As for the actual situation, the channel conditions in an area may change at any time, so that the fixed RIS cannot improve the communication performance, and the security of information transmission cannot be well guaranteed.
In addition, for the optimization of RIS deployment, most of the research methods will consume a lot of computing resources if they are used in practice.
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[0088] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0089] It should be understood that when used in this specification and the appended claims, the terms "comprising" and "comprises" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude one or Presence or addition of multiple other features, integers, steps, operations, elements, components and / or collections thereof.
[0090] It should also be understood that the terminology used ...
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The invention discloses a secure transmission method and system based on an air-based reconfigurable intelligent surface, and aims to enhance legal transmission between ground transmitting and receiving nodes by deploying an ARIS in the presence of an eavesdropper. For instantaneous channel state information of a legal channel and an eavesdropping channel, an optimization model for jointly optimizing ARIS beam forming and deployment to maximize a system secure transmission rate is constructed. During fixed ARIS deployment, ARIS beam forming is optimized through adoption of a relaxation and semi-definite programming method; and the ARIS deployment problem is optimized through the deep reinforcement learning training agent, and the optimal position of the ARIS is found, so that the wireless transmission security of the communication system is ensured. Compared with a traditional method, the position of the unmanned aerial vehicle can be changed in real time according to changeable channel conditions; and less computing resources and time are consumed; and the secure transmission rate is effectively improved.
Description
technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a safe transmission method and system based on a space-based reconfigurable smart surface. Background technique [0002] Due to the broadcasting and openness of wireless transmission media, wireless communication is easy to be eavesdropped, so secure communication is a key issue in current wireless transmission systems. With the rapid development of computer technology, computing power has been greatly improved compared to the past, and traditional security methods can be easily cracked. The physical layer security technology can make use of the characteristics of wireless communication channels to ensure information security, and it has attracted widespread attention because of its high confidentiality. [0003] On the other hand, the reconfigurable intelligent surface (Reconfigurable Intelligent Surface, RIS) that appeared in recent years is regarded...
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Patent Timeline
Login to View More IPC IPC(8): H04B7/185H04B7/06H04B17/391H04W12/122G06N20/00
CPCH04W12/122H04B7/18506H04B7/18519H04B17/391G06N20/00H04B7/0617H04K2203/22H04K3/68H04K3/827H04K3/25H04B7/04013
Inventor 唐晓江天奇王大伟翟道森张若南
Owner NORTHWESTERN POLYTECHNICAL UNIV