Journal on Communications ›› 2023, Vol. 44 ›› Issue (12): 1-14.doi: 10.11959/j.issn.1000-436x.2023238

• Topics: Key Technologies of Spectrum Game in Space-Air-Ground Integrated Networks •    

Secure and collaborative spectrum sensing scheme based on audit game

Yuntao WANG1, Zhou SU1, Qichao XU2, Yiliang LIU1, Haixia PENG1, Hao LUAN1   

  1. 1 School of Cyber Science and Engineering, Xi'an Jiaotong University, Xi’an 710049, China
    2 School of Mechatronic Engineering and Automation, Shanghai University, Shanghai 200444, China
  • Revised:2023-09-27 Online:2023-12-01 Published:2023-12-01
  • Supported by:
    The National Natural Science Foundation of China(62302387);The National Natural Science Foundation of China(62273223);The National Natural Science Foundation of China(U23A20276);The National Natural Science Foundation of China(62101429);Postdoctoral Innovative Talent Support Program of China(BX20230282)

Abstract:

To defend against poisoning attacks and free-riding attacks conducted by malicious sensing terminals in crowd sensing-based collaborative spectrum sensing (CCSS), a novel audit game-based defense scheme was proposed, which combined the pre-deterrence and post-punishment mechanisms.Firstly, considering the audit budget constraint, a mixed-strategy audit game model under incomplete information was designed, which set a penalty strategy to deter malicious collaborators before spectrum sensing, and audited and punished them after the fusion of sensing data.Then, a lightweight audit chain model with on-chain and off-chain collaboration was designed, in which audit evidence was stored in an off-chain data warehouse and its metadata was publicly published on the blockchain.Furthermore, a distributed and intelligent audit algorithm based on reinforcement learning was devised to adaptively seek the approximate mix-strategy equilibrium of the audit game.Simulation results demonstrate that the proposed scheme can quickly obtain the stable and approximately optimal audit strategies and actively suppress the poisoning and free-riding behaviors of malicious collaborators, in comparison with conventional schemes.

Key words: collaborative spectrum sensing, audit game, security, blockchain, reinforcement learning

CLC Number: 

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