A Physical Layer Security Communication Method for Authorization System Based on Cognitive User Selection Assistance

Abstract

The physical layer security communication method of the authorized system based on assisting the cognitive user to select includes: S1, the authorized user transmitter sends notification information to the authorized user receiver and the cognitive user transmitter before transmitting information; S2, the authorized user receiver receives After notifying the information, the pilot signal is broadcast; S3, the cognitive user transmitter selects whether to join the candidate set based on the communication between the authorized user receiver, the authorized user transmitter and the cognitive user transmitter; S4, the cognitive user transmitter calculates the Authorized user receiver, cognitive user transmitter and eavesdropping user communication parameters, and sent to the authorized user transmitter; S5, the authorized user transmitter selects a cognitive user transmitter from the candidate set as an assisting cognitive user User; S6. The authorized user transmitter shares the authorized frequency band with the assisting cognitive user, and the assisting cognitive user transmits assisting artificial noise. The invention can effectively improve the security performance of the physical layer of the authorization system.

Description

technical field [0001] The invention relates to the field of cognitive wireless networks, in particular to a physical layer security communication method of an authorization system based on assisting cognitive user selection. Background technique [0002] Cognitive Radio Network (CRN) is currently an effective method to alleviate the shortage of spectrum resources and improve spectrum efficiency. In view of the dynamic and open wireless propagation characteristics of CRN, information sent through CRN is extremely vulnerable to eavesdropping attacks by eavesdroppers (Eve), which poses a great threat to wireless network communication security. The traditional encryption security mechanism cannot be applied to the dynamic and open CRN system architecture. Physical Layer Security (PLS), as a supplement and replacement of the encryption security mechanism, can be used to ensure the communication security of the cognitive wireless network. Therefore, it is of great practical sign...

AI Technical Summary

Problems solved by technology

The existing research focuses on the use of certain technologies to enhance the physical security of users, which often leads to the decline of user service quality. Therefore, it is only possible to study a transmission scheme that can improve the user's information security transmission performance without affecting the user service quality. It is the hope of the people in the industry

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