5G非地面网络安全研究

5G Non-terrestrial Networks Security Exploration

首先介绍了5G非地面网络(Non-Terrestrial Networks,NTN)的几种典型应用场景,包括多重连接、固定平台网络连接、移动平台连接和低密度地区补充服务;其次分析了5G NTN系统的透明架构和星上处理架构的系统组成、部署方式、协议栈情况;再次剖析了5G非地面网络分别在物理层、数据链路层、网络层、传输层和应用层面临的安全威胁以及相应的防护技术;最后对系统所面临的网络入侵及通信干扰、通信监听及伪装欺骗、大量物联网设备通过卫星接入等突出安全问题进行了探讨,并提出了可行的解决思路。

First,several typical application scenarios of 5G NTN(Non-Terrestrial Network)are presented,including multiple connectivity,fixed platform network connectivity,mobile platform connectivity and complementary services in low density areas.Then,the transparent architecture of 5G NTN system and the system composition,deployment mode,and protocol stack of on-board processing architecture are analyzed.Next,the security threats faced by 5G non-terrestrial networks at the physical layer,data link layer,network layer,transport layer and application layer,respectively,and the corresponding protection technologies are profiled.Finally,several prominent security problems faced by the system,such as network intrusion and communication interference,communication monitoring and access of a large number of IoT devices through satellite,are discussed and feasible solutions are put forward.