摘要
我国铁路正在有序推进5G技术铁路应用的研究,检测技术可为铁路5G专网试验验证、网络优化、工程建设提供支撑。在分析专网线状覆盖、SA架构、频率资源有限等特点的基础上,结合检测需求,搭载动车组采集实测样本,采用公式拟合、系统仿真、t-分布模型等数学方法开展研究。对比列车内外天线电平差异,提出场强检测方案和指标确定方法并进行仿真;提出服务质量检测指标,计算样本数要求;除了低延时、大带宽等应用业务外,对列控等业务的优先级保障检测方法进行阐述。通过研究,提出场强覆盖、服务质量、业务功能三层检测架构及每一层检测方案,指出通过专网检测数据与DPI等多数据源融合,综合智能对比分析网络状态变化趋势的未来研究方向。
China’s railway is carrying out researches on 5 G technology innovation and application in an orderly manner, and the inspection technology can provide support for dedicated railway 5 G network in terms of inspection and verification, network optimization and engineering construction. On the basis of analyzing the characteristics of linear coverage, SA architecture and limited frequency resources and in response to inspection requirements, samples are collected onboard the EMU train, and mathematical methods, such as formula fitting, system simulation and t-distribution model, are adopted to conduct the researches. The antenna level differences inside and outside the train are compared, and the field strength inspection scheme and the method to determine index requirements are put forward and simulated. The service quality inspection items are put forward and sample number requirements are calculated. In addition to the application services such as low latency and large bandwidth, the inspection methods of priority guarantee function for the services such as train control are described. Based on the above researches, this paper puts forward a three-layer inspection framework with respect to field strength, service quality and service functions, and specific inspection scheme of each layer, and points out the future research direction of integrating dedicated network inspection data with multiple data sources such as DPI so as to comprehensively and intelligently compare and analyze the state variation tendency of the network.
作者
梁轶群
郝扬
李岸宁
周宏伟
LIANG Yiqun;HAO Yang;LI Anning;ZHOU Hongwei(Postgraduate Department,China Academy of Railway Sciences,Beijing 100081,China;China Academy of Railway Sciences Corporation Limited,Beijing 100081,China;Beijing Huatie Information Technology Co.,Ltd.,Beijing 100081,China)
出处
《铁道标准设计》
北大核心
2021年第12期123-130,共8页
Railway Standard Design
基金
中国国家铁路集团有限公司科技研究计划-系统性重大项目(P2020G004)
中国铁道科学研究院集团有限公司科研重大专项课题(2020YJ016)。
关键词
铁路通信
5G专网
检测
场强
服务质量
业务
railway communication
dedicated 5G network
inspection
field strength
quality of service(QoS)
service
