基于集对可拓和改进层次分析法的铁路通信系统安全评估

Safety Evaluation of Railway Communication System Based on Set Pair Extension and Improved Analytic Hierarchy Process

针对现有高速铁路中LTE-R通信系统安全评估方法不足且评估过程存在模糊性和灰色性等问题,建立基于集对可拓和改进层次分析法的LTE-R通信系统风险评估模型.从影响通信系统的人、设备和网络等主要方面建立评估体系,确定风险评估指标和评价标准.利用改进层次分析法计算权重,基于集对可拓构建系统风险集对和计算风险联系隶属度,从而判断通信系统风险等级.实例分析表明,使用集对可拓和改进层次分析法可有效和真实反映LTE-R通信系统的风险状态,可为LTE-R通信系统的安全建设系统与风险管控提供理论依据.

In view of the lack of security assessment methods of LTE-R communication systems in high-speed railway and the fuzziness and gray of the evaluation process,this study develops a risk assessment model for LTE-R communication systems based on set pair extension and improved analytic hierarchy process.The evaluation system is established mainly from the aspects of people,equipment,and networks that affect the communication system,and the risk assessment indicators and evaluation standards are determined.The improved analytic hierarchy process is used to calculate the weight,construct the system risk set pair via the set pair extension and calculate the risk connection membership degree to judge the risk level of the communication system.The analysis of an example shows that the use of set pair extension and improved analytic hierarchy process can effectively and truly reflect the risk state of LTE-R communication systems and can provide a theoretical basis for their security construction and risk control.