Systems Engineering and Electronics ›› 2018, Vol. 40 ›› Issue (3): 671-675.doi: 10.3969/j.issn.1001-506X.2018.03.28

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Prediction of untrusted relay behavior based on physical layer security features

FU Xiaomei1,2, CHEN Li2, CHANG Shuai1   

  1. 1. School of Marine Science and Technology, Tianjin University, Tianjin 300072, China; 2. School of Electrical and Information Engineering, Tianjin University, Tianjin 300072, China
  • Online:2018-02-26 Published:2018-02-26

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Abstract:

The untrusted relay behavior will decrease the physical layer security performance in cooperative communication system. To predict the relay behavior, we propose a relay misbehavior prediction scheme based on the stochastic game. The probabilities of relay misbehaviors, including the selfish and malicious behaviors of the relay, can be obtained depending on the proposed scheme. The ergodic secrecy capacity is calculated as the game payoffs to investigate the relay behavior features of physical layer security. Moreover, the continuous-time Markov chain (CTMC) is used to capture the relationship between the relay behavior and the randomness of system states. The experiment is implemented to obtain the misbehavior probability of relay and the experiment results demonstrate the validation of the relay behavior prediction scheme.

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