系统工程与电子技术 ›› 2018, Vol. 40 ›› Issue (3): 671-675.doi: 10.3969/j.issn.1001-506X.2018.03.28

• 通信与网络 • 上一篇    下一篇

基于物理层安全特征的不可信中继行为预测

付晓梅1,2, 陈莉2, 常帅1   

  1. 1. 天津大学海洋科学与技术学院, 天津 300072; 2. 天津大学电气自动化与信息工程学院, 天津 300072
  • 出版日期:2018-02-26 发布日期:2018-02-26

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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摘要：

中继节点可能存在的不可信行为会影响协作通信系统中物理层安全性。为了预测中继的行为,提出了基于随机博弈的中继不可信动态行为预测方法,获得中继节点合作和自私、恶意等不可信行为的概率,进而预测中继节点的自私以及恶意行为。将遍历安全容量作为博弈收益,研究中继节点行为的物理层安全特征。利用连续时间马尔可夫链捕获中继行为和系统随机状态两者之间的关系,通过实验得到了中继的不可信行为概率,验证了该预测模型的有效性。

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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