5G-R接入网基站单元设备组网可靠性分析  

Reliability Analysis of Base Station Unit Equipment Networking in 5G-R Access Network

作　　者：鞠昊哲 王东明[2] 胡静[2] 刘瑜 王海龙 陈建平 JU Haozhe;WANG Dongming;HU Jing;LIU Yu;WANG Hailong;CHEN Jianping

机构地区：[1]东南大学移动通信国家重点实验室,南京泰通科技有限公司,南京210096 [2]东南大学移动通信国家重点实验室,东南大学—泰通科技铁路5G移动通信联合研发中心,南京210096 [3]南京泰通科技股份有限公司,南京210039

出　　处：《铁道通信信号》2023年第11期40-48,共9页Railway Signalling & Communication

基　　金：国家自然科学基金(61771126);中国国家铁路集团有限公司科技研究开发计划系统性重大课题(P2020G004)。

摘　　要：铁路5G-R专网的可靠性、安全性和容灾能力是铁路独特场景下组网的重要需求,基站组网方案的可靠性定量分析是5G-R组网方案设计的重要理论依据,冗余组网对5G-R基站中主要单元设备进行备份是5G-R场景下提高系统可靠性的主要方案。针对射频拉远单元(RRU)与基带处理单元(BBU)组成的基站系统和将BBU拆分为分离的集中式单元(CU)及分布式单元(DU)的基站系统,利用静态分析和动态故障树分析方法建立可靠性分析模型,定量计算2种基站系统的可靠性参数。同时,采用蒙特卡洛仿真法,建立较完备的基站设备管控和故障切换逻辑,模拟基站故障场景,对2种基站组网系统的薄弱环节进行分析。仿真结果和可靠性参数指标表明:冗余组网设计有效地提高了2种基站组网系统的可靠性,且通过交叉连接方式可以有效减小CU和DU分离部署带来的可靠性损失,验证了该冗余组网方案的可行性。The reliability,safety,and disaster tolerance of 5G-R dedicated network are important requirements for networking in unique railway scenarios.Quantitative reliability analysis of base station networking schemes is an important theoretical basis for the design of 5G-R networking schemes.Redundant networking to backup the main unit equipment in 5G-R base station is the main scheme to improve the system reliability in 5G-R scenarios.For the base station system composed of radio frequency remote unit and baseband processing unit(BBU),as well as the base station system that separates the BBU into separate centralized units(CU)and distributed units(DU),a reliability analysis model is established using static analysis and dynamic fault tree analysis methods to quantitatively calculate the reliability parameters of the two base station systems.At the same time,the Monte Carlo simulation method is used to establish complete base station equipment management and failover logic,simulate base station failure scenarios,and analyze the weaknesses of the two base station networking systems.The simulation results and reliability parameters indicate that the redundant networking design effectively improves the reliability of the two base station networking systems,and the cross wiring can effectively reduce the reliability loss caused by the separate deployment of CU and DU,verifying the feasibility of this redundant networking scheme.

关 键 词：第五代铁路无线通信 基站组网 可靠性 分布式单元 集中式单元 蒙特卡洛仿真 

分 类 号：U285.2[交通运输工程—交通信息工程及控制]