移动通信系统平均物理层安全容量

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清华大学辅仁网/2017-07-07

移动通信系统平均物理层安全容量

李涛¹, 张焱², 许希斌³, 周世东^1,3

1. 清华大学电子工程系, 微波与数字通信国家重点实验室, 北京 100084;
2. 北京理工大学信息与电子学院, 北京 100081;
3. 清华大学信息科学与技术国家实验室, 北京 100084

Mean physical-layer secrecy capacity in mobile communication systems

LI Tao¹, ZHANG Yan², XU Xibin³, ZHOU Shidong^1,3

1. State Key Lab on Microwave and Digital Communications, Department of Electronic Engineering, Tsinghua University, Beijing 100084, China;
2. School of Information and Electronics, Beijing Institute of Technology, Beijing 100081, China;
3. Tsinghua National Laboratory for Information Science and Technology, Tsinghua University, Beijing 100084, China

摘要:

输出: BibTeX | EndNote (RIS)

摘要为提升移动通信系统的安全性,研究了用户移动时的平均物理层安全容量。在实际传播环境中,用户移动会导致物理层安全容量在大范围内变化,因此提出合法用户平均物理层安全容量以刻画系统的安全通信性能。通过分析窃听者位置对平均物理层安全容量的影响,得到了平均物理层安全容量的分布特征。根据分布特征,提出了一种改善平均物理层安全容量的方案。该方案通过限制窃听者存在区域,保证用户平均物理层安全容量不低于指定值。理论和数值分析结果表明:所提方案可以有效地保障移动通信系统的平均物理层安全容量。

关键词 ：移动通信,物理层安全,平均物理层安全容量

Abstract：The security of mobile communication systems depends on the mean physical-layer secrecy capacity as the user moves. In realistic propagation environments, the physical-layer secrecy capacity varies over a vast range because of the user motion. A mean physical-layer secrecy capacity of a legitimate user is defined to characterize the secure communication performance of the system. The distribution characteristics of the mean physical-layer secrecy capacity are derived based on the impact of the eavesdropper's position on the mean physical-layer secrecy capacity. A scheme is then given to improve the mean physical-layer secrecy capacity according to the distribution characteristics. The mean physical-layer secrecy capacity can be made to be not lower than a specified value by limiting the eavesdropper's positions. Theoretical and numerical results demonstrate that this scheme can effectively guarantee the mean physical-layer secrecy capacity in mobile communication systems.

Key words：mobile communication physical-layer security mean physical-layer secrecy capacity

收稿日期: 2015-03-06 出版日期: 2015-12-01

ZTFLH:

TP929.5

通讯作者:周世东,教授,E-mail:zhousd@tsinghua.edu.cnE-mail: zhousd@tsinghua.edu.cn

引用本文:

李涛, 张焱, 许希斌, 周世东. 移动通信系统平均物理层安全容量[J]. 清华大学学报（自然科学版）, 2015, 55(11): 1241-1245,1252.
LI Tao, ZHANG Yan, XU Xibin, ZHOU Shidong. Mean physical-layer secrecy capacity in mobile communication systems. Journal of Tsinghua University(Science and Technology), 2015, 55(11): 1241-1245,1252.

链接本文:

http://jst.tsinghuajournals.com/CN/10.16511/j.cnki.qhdxxb.2015.21.013或 http://jst.tsinghuajournals.com/CN/Y2015/V55/I11/1241

图表:

图１　单蜂窝小区示意图

图２　上行信道中用户安全容量的中断概率

图３　用户在某个扇区等概分布,下行信道的平均物理层安全容量随窃听者位置的变化

图４　用户在某个扇区等概分布,上行信道的平均物理层安全容量随窃听者位置的变化

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