韩帅
1, 李季蹊
1, 李静涛
2
（1. 哈尔滨工业大学，中国 哈尔滨 150000；
2. 中国空间技术研究院，中国 北京 100081）
摘要：分析了卫星地面融合网络（ISTN）中的现有安全架构与潜在的安全威胁。针对低轨卫星星座场景，以频发的窃听威胁作为研究重点；针对ISTN中的窃听威胁，提出了基于物理层安全（PLS）的解决方案；针对ISTN应用物理层安全解决方案所面临的相关信道、同频干扰、邻频干扰以及多用户多窃听者场景等挑战，提出了相应的解决方案。这对中国卫星互联网设施建设的落地具有重大的现实意义。
关键词：卫星地面融合网络；窃听威胁；物理层安全
Interception Threats and Physical Layer Security Solution of Integrated Satellite-Terrestrial Networks
HAN Shuai1, LI Jixi1, LI Jingtao2
(1. Harbin Institute of Technology, Harbin 150000, China;
2. China Academy of Space Technology, Beijing 100081, China)
Abstract: The existing security architecture and potential threats in the integrated satellite-terrestrial networks (ISTNs) are analyzed. Considering the Low Earth Orbit (LEO) satellite constellation scenario, the frequent interception threats are selected as the research focus. In view of the interception threat, solutions based on physical layer security (PLS) are proposed. The challenges of applying PLS to an ISTN, including correlated channels, co-channel interference, adjacent channel interference, and multi-user multi-eavesdropper scenarios are proposed, and the corresponding solutions to these challenges are then analyzed. This is of great practical significance to the construction of China's satellite Internet facilities.
Keywords: integrated satellite-terrestrial networks; interception threats; physical layer security
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