Authorization system physical layer secure communication method based on assisting cognitive user selection

Abstract

An authorization system physical layer secure communication method based on assisting cognitive user selection comprises the steps that S1, an authorized user transmitter sends notification information to an authorized user receiver and a cognitive user transmitter before transmitting information; S2, after receiving the notification information, the authorized user receiver broadcasts a pilot signal; S3, the cognitive user transmitter selects whether to join an alternative set or not based on the communication condition of the authorized user receiver with the authorized user transmitter and the cognitive user transmitter; S4, the cognitive user transmitter calculates communication condition parameters among the authorized user receiver, the cognitive user transmitter and the eavesdropping user, and sends the communication condition parameters to the authorized user transmitter; S5, the authorized user transmitter selects one cognitive user transmitter from the alternative set as an auxiliary cognitive user; and S6, the authorized user transmitter and the auxiliary cognitive user share an authorized frequency band to assist the cognitive user in transmitting the auxiliary artificial noise. According to the invention, the physical layer security performance of the authorization system can be effectively improved.

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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