Reducing the Destructive Effect of Misbehaving Users in Cooperative Spectrum Sensing using Reinforcement Learning
Journal Title: Electronic and Cyber Defense - Year 2023, Vol 10, Issue 4
Abstract
The presence of misbehaving users in Cognitive Radio Networks (CRN) can disrupt the process of spectrum sensing and detecting the status of the Primary User (PU). In order to reduce the destructive effect of this group of users in CRNs, in this paper, a new mechanism based on reinforcement learning for cooperative spectrum sensing is presented. The proposed method is a cooperative spectrum sensing mechanism based on user weighting, according to which users receive a weight commensurate with how they behave in spectrum sensing. The reinforcement learning model used in the proposed method is a learning automata which, using reward and penalty processes, allocates more weight to users with normal behavior in sensing the spectrum and less to misbehaving users. In this way, the learning automata updates the users' weight vector based on the response received from the environment, after performing a sensing operation in each repetition. After repeating the sensing operation several times, the learner will be able to optimize the user's weight vector. In order to evaluate the proposed method, its performance in the simulation environment has been tested and the results have been compared with the existing method for cooperative spectrum sensing. The results show that using the proposed method in the presence of misbehaving users will significantly improve network performance.
Authors and Affiliations
seyede zohre majidian,
Keywords
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