5G和WiFi6技术在地铁BAS中的研究与应用

城市轨道交通环境与设备监控系统(building automation system，BAS)的传统组网方案主要是冗余现场总线和工业以太网方案，这两种方案均需要铺设大量通信电缆，且数据传输速度和距离会受到一定限制。随着5G和WiFi6无线通信技术的普及与应用，通过与传统组网方案进行对比分析，提出基于5G和WiFi6的BAS冗余无线通信方案。相比传统BAS组网方案，该方案大大增强了BAS系统的稳定性、可靠性、扩展性、维护性和数据实时性，同时优化了施工图纸设计，避免了大量通信电缆的铺设施工，降低了相关材料和人力成本。此方案符合《中国城市轨道交通智慧城轨发展纲要》中提出的应用云计算、大数据、物联网、5G等新兴技术，深度融合乘客、设施、设备、环境新信息，构建安全、便捷、高效、绿色、经济的新一代中国式智慧城市轨道交通的发展战略。

Research and Application of 5G and WiFi6 Technologies in Subway BAS

Traditional networking schemes for building automation systems mainly consist of redundant fieldbus and industrial Ethernet schemes, both of which require a large number of communication cables, limiting the data transmission speed and distance are limited to some extent. With the popularization and application of 5G and WiFi6 wireless communication technologies, a BAS redundant wireless communication scheme based on 5G and WiFi6 is proposed c and compared with traditional networking schemes. Compared with the traditional BAS networking scheme, the proposed scheme greatly enhances the stability, reliability, expansibility, maintainability, and real-time data characteristics of a BAS system. The proposed scheme optimizes the construction drawing design and dispenses with the need for laying numerous communication cables, thereby reducing the related materials and labor costs. This plan agrees with the development of the Chinese intelligent urban rail transit outline regarding the application of cloud computing, big data, Internet of things, 5G depth fusion passengers, and other emerging technologies. Moreover, information related to facilities, equipment, and environment necessary to build safe, convenient, efficient, green, and economical new generation of Chinese urban rail transit development strategy is presented.