A comparative study of cooperative and non-cooperative game model for overlay spectrum access in multihop cognitive radio networks
Noel Jeygar Robert V, K. Vidya · AIP conference proceedings · 2021
Cognitive radio technology provides a prominent solution to address the spectrum underutilization problem by changing its operation parameters dynamically from unlicensed band to licensed band. Cognitive users or secondary users (SU) can opportunistically access the vacant bands of the spectrum or white spaces available in the licensed channel. Incumbent detection of the primary user (PU) in the vacant bands makes the secondary user leave the vacant band and switch to another channel. Switching to multiple channels degrades the performance of the secondary user. There arises a conflict between primary users and secondary users to operate the vacant band simultaneously. Game theory is found to be a good economical tool to solve the problem of interference mitigation between users. In this paper, a comparative study is conducted between a cooperative and non-cooperative game model to conclude which model provides a pareto-optimal solution and a competitive equilibrium between the primary user and secondary user in operating the valuable vacant bands. Simulation results show that the collusion agreements between the primary user and secondary user using non- cooperative game model maximizes the performance of the secondary user without affecting the primary user.