目前,802.11无线网络已在城市轨道交通系统中应用,如南京地铁二号线信号系统中的DCS(数据通讯系统)和PIS(车载乘客信息系统)。而WMN(无线网状网)是在802.11无线局域网成熟的技术基础上提出的,是一种新型的网络技术,支持业务数据的透明传输和宽带高速多媒体业务服务,符合Wi-Fi多媒体要求的QoS标准。通过本身特有的自我发现、自我组网、自我配置和自我维护等技术增强了无线网络的可靠性和易维护性。本文就无线Mesh网络技术和应用进行讨论,综述无线Mesh网络的基本技术、应用架构、产品选型的主要因素和物理品质,以及在城市轨道交通系统中的具体应用。 At present, 802.11 wireless networks have been used in urban rail transit systems such as DCS (Data Communication System) and PIS (Car Passenger Information System) in Nanjing Metro Line 2 signaling system. The WMN (Wireless Mesh Network) is based on the mature technology of 802.11 wireless LAN. It is a new type of network technology that supports the transparent transmission of business data and high-speed broadband multimedia services and meets the requirements of QoS for Wi-Fi multimedia standard. Through its own unique self-discovery, self-network, self-configuration and self-maintenance technologies to enhance the reliability and ease of maintenance of wireless networks. This article discusses wireless Mesh network technology and its application, and summarizes the basic technology, application architecture, main factors and physical quality of wireless Mesh network, and its application in urban rail transit system.