An Analysis on Interactions among Secondary User and Unknown Jammer in Cognitive Radio Systems by Fictitious Play

TL;DR

This paper analyzes how secondary users in cognitive radio systems can defend against unknown jammers using a game-theoretic approach called fictitious play, addressing security challenges in spectrum sharing.

Contribution

It introduces a novel application of fictitious game theory to model and analyze defense strategies against unknown jammers in cognitive radio networks.

Findings

Fictitious play effectively models secondary user strategies against unknown jammers.

The approach improves spectrum security by optimizing switching strategies.

Results demonstrate enhanced resilience of cognitive radio systems to malicious interference.

Abstract

With the advancement of communication, the spectrum shortage problem becomes a serious problem for future generations. The cognitive radio technology is proposed to address this concern. In cognitive radio networks, the secondary users can access spectrum that allocated to the primary users without interference to the operation of primary users. Using cognitive radio network raises security issues such as jamming attack. A straightforward strategy to counter the jamming attack is to switch other bands. Finding the best strategy for switching is complicated when the malicious user is unknown to the primary users. This paper uses fictitious game for analysis the defense against such an unknown jammer.