Method for selecting relay nodes capable of enhancing security performance of cognitive relay network

Abstract

The invention relates to a method for selecting relay nodes capable of enhancing the security performance of a cognitive relay network. With the method adopted in a user communication process, the security performance of the network can be effectively improved, specifically, two important safety indexes, namely, safety interrupt probability and ergodic security capacity, are improved, and the instantaneous channel gain of wiretap channels is not required to be obtained, and only the average channel gain of the wiretap channels is required to be acquired, and therefore, implementation complexity is low.

Description

technical field [0001] The present invention relates to the fields of wireless communication and physical layer security, and more specifically relates to a method for selecting a relay node that enhances the security performance of a cognitive relay network. Background technique [0002] In the process of continuous development and innovation of wireless communication, as a core issue of wireless communication, information security has always been the focus of people's attention, and it is also a prerequisite for the large-scale popularization and application of wireless networks. With the continuous emergence of various new wireless communication technologies and the rapid growth of the number of wireless communication network users, the problem of information security is becoming increasingly serious. At the same time, as a method that can effectively enhance the transmission performance of wireless communication systems, relay networks have been well researched and explo...

AI Technical Summary

Problems solved by technology

[0009] For the first three relay selection algorithms, only the instantaneous state information of the legal channel is considered, and the information of the eavesdropping channel is not considered, resulting in limited improvement in network transmission security performance

For the fourth relay selection algorithm, since the instantaneous signal-to-noise ratio of the legal channel and the average signal-to-noise ratio of the eavesdropping channel are considered, the performance is better than the first three, but there is still a relatively high outage probability, which needs further optimization

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