Terminals and their access represent a vulnerable aspect in the security framework of 5G-railway(5G-R)system.To enhance the control of 5G-R terminals and their access to applications,this paper analyzes the applicatio...Terminals and their access represent a vulnerable aspect in the security framework of 5G-railway(5G-R)system.To enhance the control of 5G-R terminals and their access to applications,this paper analyzes the application scenarios,operational modes,services supported by 5G-R terminals,and the data paths between these terminals and the connected railway application service systems.Further analysis concentrates on the security risks posed by the characteristics of intelligent 5G-R handheld terminals,lightweight Internet of Things(IoT)communication terminals,and onboard integrated wireless transmission equipment with public-private convergence.In light of the risks above,this paper presents the terminal security control requirements.Furthermore,based on the planned architecture of the 5G-R system and security technologies such as terminal identity authentication and behavior auditing,the paper proposes a solution package for the 5G-R terminal security control system,including the overall architecture,functional implementation,and interface configuration.These solutions aim to achieve unified control over the admission and access of 5G-R handheld terminals,IoT communication terminals,and onboard integrated wireless communication equipment to railway application systems.Additionally,they enable the security control and analysis of terminal behaviors and application data,facilitate the security management of terminals,and ensure the secure release,download,and installation of mobile applications.展开更多
针对高速列车未来在5G-R通信场景下,传统越区切换算法存在参数固定、乒乓切换率较高等问题,提出一种基于灰色-模糊推理的5G-R越区切换算法。首先,建立在郊区等开阔场景下5G-R的无线信号传播模型,该算法对列车运行过程中的参考信号接收功...针对高速列车未来在5G-R通信场景下,传统越区切换算法存在参数固定、乒乓切换率较高等问题,提出一种基于灰色-模糊推理的5G-R越区切换算法。首先,建立在郊区等开阔场景下5G-R的无线信号传播模型,该算法对列车运行过程中的参考信号接收功率(Reference Signal Receiving Power,RSRP)进行采集,并通过GM(1,1)灰色模型对当前时刻的RSRP进行预测。其次,选取列车运行速度、预测的参考信号功率等参数,利用梯形、三角隶属度函数对其进行模糊处理作为模糊推理系统的输入值。最后,设计一种模糊推理系统,通过模糊推理并去模糊化后输出精确的迟滞门限值。仿真结果表明,与同类型算法相比,所提算法的乒乓切换次数更低,有效提升高速列车越区切换的稳定性。展开更多
文摘Terminals and their access represent a vulnerable aspect in the security framework of 5G-railway(5G-R)system.To enhance the control of 5G-R terminals and their access to applications,this paper analyzes the application scenarios,operational modes,services supported by 5G-R terminals,and the data paths between these terminals and the connected railway application service systems.Further analysis concentrates on the security risks posed by the characteristics of intelligent 5G-R handheld terminals,lightweight Internet of Things(IoT)communication terminals,and onboard integrated wireless transmission equipment with public-private convergence.In light of the risks above,this paper presents the terminal security control requirements.Furthermore,based on the planned architecture of the 5G-R system and security technologies such as terminal identity authentication and behavior auditing,the paper proposes a solution package for the 5G-R terminal security control system,including the overall architecture,functional implementation,and interface configuration.These solutions aim to achieve unified control over the admission and access of 5G-R handheld terminals,IoT communication terminals,and onboard integrated wireless communication equipment to railway application systems.Additionally,they enable the security control and analysis of terminal behaviors and application data,facilitate the security management of terminals,and ensure the secure release,download,and installation of mobile applications.
文摘针对高速列车未来在5G-R通信场景下,传统越区切换算法存在参数固定、乒乓切换率较高等问题,提出一种基于灰色-模糊推理的5G-R越区切换算法。首先,建立在郊区等开阔场景下5G-R的无线信号传播模型,该算法对列车运行过程中的参考信号接收功率(Reference Signal Receiving Power,RSRP)进行采集,并通过GM(1,1)灰色模型对当前时刻的RSRP进行预测。其次,选取列车运行速度、预测的参考信号功率等参数,利用梯形、三角隶属度函数对其进行模糊处理作为模糊推理系统的输入值。最后,设计一种模糊推理系统,通过模糊推理并去模糊化后输出精确的迟滞门限值。仿真结果表明,与同类型算法相比,所提算法的乒乓切换次数更低,有效提升高速列车越区切换的稳定性。
