基于GNSS主动感知的5G TDD网络级时钟安全研究  

Study on 5G TDD network-level clock security based on GNSS active perception

作　　者：黄文勇 宋仕斌 吴夏 HUANG Wenyong;SONG Shibin;WU Xia(Sichuan Public Project Consulting and Management Co.,Ltd.,Chengdu 610058,China;China Telecom Co.,Ltd.Sichuan Branch,Chengdu 610000,China)

机构地区：[1]四川公众项目咨询管理有限公司,成都610058 [2]中国电信股份有限公司四川分公司,成都610000

出　　处：《通信与信息技术》2023年第6期120-124,共5页Communication & Information Technology

摘　　要：基于时钟同步对5G TDD网络安全运行的重要性,就GNSS安全威胁与1588v2时钟可靠性展开分析。对基站故障场景业务特征识别、5G NR空口检测算法、多维信息联合诊断、时钟源质量评估与备份进行研究,通过关键技术的突破提出单站及网络级时钟安全解决方案。实现5G基站硬件能力与时钟源解耦、主动识别GNSS干扰源,具备快速识别并隔离单站时钟故障与网络级时钟故障联合诊断能力,确保以网络时钟安全为前提降低5G TDD网络时钟系统运营成本。Based on the importance of clock synchronization to the safe operation of 5G TDD network,GNSS security threats and 1588v2 clock reliability are analyzed.Research on base station failure scenario service feature recognition,5G NR air port detection al⁃gorithm,multi-dimensional information joint diagnosis,clock source quality assessment and backup,and put forward single-station and network-level clock security solutions through key technology breakthroughs.It realizes the decoupling of 5G base station hard⁃ware capability and clock source,actively identifies GNSS interference sources,has the ability to quickly identify and isolate singlestation clock faults and joint diagnosis of network-level clock faults,and ensures that network clock security is the prerequisite for re⁃ducing the operating cost of 5G TDD network clock system.

关 键 词：5G TDD GNSS 主动感知 时钟安全 

分 类 号：TN929.5[电子电信—通信与信息系统]