地铁WIFI项目计划概述1(国外英文资料).doc

地铁WIFI项目方案概述1(国外英文资料) An overview of the subway wi-fi program One, the project introduction: 1, the introduction of the zhengzhou metro pilot situation: Project overview The first phase of the line is 26.2 km long. Set 20 stations, the maximum distance of 2353.71 m, the minimum distance of 944.2 m, and the average distance of 1.325 km. Line 1 of the first phase of line 1: the first 25 columns, the final plan for 47 cars The maximum speed is 80 KM/H, and the minimum train starts at 3 minutes. The cable is Shared by the public net and the two cables are in the one-way tunnel The business requirements L station/the wide tunnel/u-shaped business requirements of the car segment: P per car 2 video monitor, 4Mpbs, and downstream PIS information 8Mbps The business requirements of the parking lot/car segment: P car park/car segment can simultaneously adjust 2 video monitoring signal uploads, up XMpbs P in non-operating time, download the video message to the vehicle via wireless communication, and then downward XMbps Wireless coverage: Co-construction and sharing The system and the civil communication system share the leakage cables, and the right side of the cable is 4.15 meters high, at 1.9 meters and 3 meters respectively There is no need to set up an antenna in the tunnel to save construction costs and maintenance costs. The connection between RRU and the drain line L 4path RRU is covered by a one-way 2path scheme, and the cables on both ends of the RRU cover the same community The rf signals of l RRU are connected to the drain line by the multifrequency concatenated circuit, along with the signal of other systems 3, the tunnel overlays the road design plan: The system shares the drain after the commercial system signal is closed To ensure that the system provides enough bandwidth to improve the overall broadband experience of users, the upstream and downstream tunnels are designed for two communities. Since the POI cannot separate the systems two signals from the publi