沈霞，周伟，王志勤
（中国信息通信研究院，中国 北京 100191）
摘要：蜂窝车联网在驾驶环境中不仅对传输时延和可靠性有较高的要求，还对通信安全性有很高的要求。分析了蜂窝车联网物理层通信中的安全问题，包括边链路通信中物理层数据的恶意解析和基于终端自主资源分配模式的非正常信道占用问题。提出的专用单播通信标识和非正常信道占用的问题监测与识别方案，可使蜂窝车联网的物理层通信安全性得到有效提升。
关键词：蜂窝车联网；物理层安全；无线通信；边链路
Physical Layer Security Issues in C-V2X Communication
SHEN Xia, ZHOU Wei, WANG Zhiqin
(China Academy of Information and Communications Technology, Beijing 100191, China)
Abstract: Cellular vehicle-to-everything (C-V2X) has stringent requirements not only on the wireless communication delay and reliability in the driving environment, but also on the communication security. The physical layer security issues in the C-V2X communication are analyzed, including malicious detecting of physical data and abnormal channel occupation using resource allocation method based on channel sensing. Solutions through allocating dedicated scrambling ID for unicast communication and abnormal channel occupation monitoring and identification scheme are put forward to deal with those problems, respectively, and the communication security of C-V2X would thus be effectively improved.
Keywords: C-V2X; physical layer security; wireless communication; sidelink
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