Abstract:
Cognitive radio technology helps to resolve the problem of static spectrum shortage
by effectively utilizing the available spectrum. By using the technique of dynamic
spectrum sensing secondary users utilize the available spectrum when the spectrum
is vacant. The utilization of spectrum for primary user is not a big issue as they are
licensed users but secondary users may exploit the working and the spectrum utilization
by launching some attacks and thus exploiting vulnerabilities in cognitive radio
networks. In this research we focus on one of attack in cognitive radio networks that
is Primary user Emulation attack in which secondary user masquerade as primary
and thus preventing legitimate secondary user from accessing the available licensed
band. In PUE attack the aim of attacker is not to cause interference to primary
users but to prevent spectrum resources used by secondary users. In this attack
the goal of attacker is to maximize its own spectrum usage or to halt the Dynamic
Spectrum Access process of legitimate secondary user by transmitting signals that
emulate the signal properties and characteristics of primary user signals. We try to
analyze how performance of primary user activity model affected by the presence of
this PUE attack.
