With the rapid advancement of 5G network technology,cyber security threats are intensifying.The fifth-generation mobile communication for railways(5G-R),as a product of the deep integration of the railway industry wit...With the rapid advancement of 5G network technology,cyber security threats are intensifying.The fifth-generation mobile communication for railways(5G-R),as a product of the deep integration of the railway industry with 5G technology,plays a crucial role in ensuring the operational safety of railways.Cyber security assessment is one of the key components in safeguarding network security,and attack graphs are one of the mainstream models for cyber security assessment methods.This paper focuses on optimizing the method for assessing the security of the 5G-R core network based on attack graphs.By integrating the business security requirements of the 5G-R core network,this paper optimizes the parameters for the conventional vulnerability assessment methods and the influencing indicators of atomic attack success probability.It also constructs a formula for calculating the atomic attack success probability based on the fuzzy analytic hierarchy process(AHP).By setting up a simulated environment of the 5G-R core network within a network target field,this paper conducts the feasibility verification of the assessment method for 5G-R core cyber security.Comparative experiments with the conventional common vulnerability scoring system(CVSS)and methods used in existing literature prove the validity and superiority of the proposed model.展开更多
为支撑5G-R(5th Generation Mobile Communication Technology for Railway)建设,需构建具备高隔离、高可靠、可管可控特性的新一代承载网络。文章对比分析了切片分组网(SPN)、IP无线接入网(IPRAN)与光传送网(OTN)等3种主流承载技术,并...为支撑5G-R(5th Generation Mobile Communication Technology for Railway)建设,需构建具备高隔离、高可靠、可管可控特性的新一代承载网络。文章对比分析了切片分组网(SPN)、IP无线接入网(IPRAN)与光传送网(OTN)等3种主流承载技术,并通过实验验证及性能测试,评估其在切片隔离性、传输时延、时间同步等方面的表现。研究表明,SPN技术深度融合时分复用与分组交换优势,支持从L1到L3的综合业务承载,具备硬隔离切片、超高精度同步、多业务融合承载等关键能力,能够有效满足铁路5G-R及既有通信业务的高安全、高可靠承载要求,具备良好推广前景。展开更多
针对5G铁路专用通信系统(5G for railways,5G-R)规模化部署后存在的基站高能耗问题,提出一套5G-R智能节能系统。该系统通过实时感知列车运行位置、速度信息,结合历史业务数据完成网络负载精准预测,动态调控基站工作模式与发射功率,实现...针对5G铁路专用通信系统(5G for railways,5G-R)规模化部署后存在的基站高能耗问题,提出一套5G-R智能节能系统。该系统通过实时感知列车运行位置、速度信息,结合历史业务数据完成网络负载精准预测,动态调控基站工作模式与发射功率,实现网络资源按需适配。仿真结果表明,5G-R智能节能系统可在保障铁路通信服务质量与切换稳定性的前提下,显著降低铁路沿线、车站典型场景的基站能耗,有效解决传统固定节能策略适配性差、能耗冗余的问题,为5G-R绿色低碳运维提供了可靠的技术支撑。展开更多
基金supported by State Key Laboratory of Advanced Rail Autonomous Operation under Grant No.RAO2023ZZ004the Project of China State Railway Group under Grant No.N2024B004ZTE Industry-University-Institute Cooperation Funds under Grant No.W23L01180.
摘要With the rapid advancement of 5G network technology,cyber security threats are intensifying.The fifth-generation mobile communication for railways(5G-R),as a product of the deep integration of the railway industry with 5G technology,plays a crucial role in ensuring the operational safety of railways.Cyber security assessment is one of the key components in safeguarding network security,and attack graphs are one of the mainstream models for cyber security assessment methods.This paper focuses on optimizing the method for assessing the security of the 5G-R core network based on attack graphs.By integrating the business security requirements of the 5G-R core network,this paper optimizes the parameters for the conventional vulnerability assessment methods and the influencing indicators of atomic attack success probability.It also constructs a formula for calculating the atomic attack success probability based on the fuzzy analytic hierarchy process(AHP).By setting up a simulated environment of the 5G-R core network within a network target field,this paper conducts the feasibility verification of the assessment method for 5G-R core cyber security.Comparative experiments with the conventional common vulnerability scoring system(CVSS)and methods used in existing literature prove the validity and superiority of the proposed model.
摘要为支撑5G-R(5th Generation Mobile Communication Technology for Railway)建设,需构建具备高隔离、高可靠、可管可控特性的新一代承载网络。文章对比分析了切片分组网(SPN)、IP无线接入网(IPRAN)与光传送网(OTN)等3种主流承载技术,并通过实验验证及性能测试,评估其在切片隔离性、传输时延、时间同步等方面的表现。研究表明,SPN技术深度融合时分复用与分组交换优势,支持从L1到L3的综合业务承载,具备硬隔离切片、超高精度同步、多业务融合承载等关键能力,能够有效满足铁路5G-R及既有通信业务的高安全、高可靠承载要求,具备良好推广前景。
摘要针对5G铁路专用通信系统(5G for railways,5G-R)规模化部署后存在的基站高能耗问题,提出一套5G-R智能节能系统。该系统通过实时感知列车运行位置、速度信息,结合历史业务数据完成网络负载精准预测,动态调控基站工作模式与发射功率,实现网络资源按需适配。仿真结果表明,5G-R智能节能系统可在保障铁路通信服务质量与切换稳定性的前提下,显著降低铁路沿线、车站典型场景的基站能耗,有效解决传统固定节能策略适配性差、能耗冗余的问题,为5G-R绿色低碳运维提供了可靠的技术支撑。