Urban underground pipe gallery Network Solution

     Urban underground comprehensive pipeline corridor is the comprehensive underground urban pipeline corridor, that is, a tunnel space is built under the city, which integrates various engineering pipelines such as electricity, communication, gas, heating, water supply and drainage, and has special maintenance ports, The hoisting port and monitoring system, implementing unified planning, unified design, unified construction and management, are the important infrastructure and "lifeline" to ensure the operation of the city. According to the different types of pipelines entering the corridor, the pipe gallery can be divided into gas/ power/water signal/heat/vacuum garbage tank. 

P1:Sectional view of pipe gallery

P2:Pipe gallery single cabin top view

     Every 200 meters of the pipe gallery is set as a fire zone, and each fire zone is separated by a fire door;
     Each fire zone is set with a feeding port, an air outlet, an air inlet, a sump, and a message Convergence box;
     Every 1000 meters set up a self-use cable transformer room, the feeding port and the transformer room share the same cabin:
     The integrated pipe gallery has full wireless coverage of WLAN. Considering the integrated access of various terminals, it is necessary to provide signal coverage of two frequency points of 2.4GHz and 5GHz at the same time. After the WLAN is fully covered, it provides wireless network support for the inspection of the entire pipe gallery, and realizes information management in the inspection process.

P3:Wireless WLAN signal coverage in pipe gallery

     The entire pipe gallery is set with a firewall every 200m. Since both 2.4GHz and 5.8GHz work in the microwave frequency band, the characteristics of these two frequency bands are straight-line transmission (the signal arrives directly or through reflection). The signal can also arrive through the reflected signal from the wall. Since a firewall will be set up every 200m, in order to ensure high-quality signal coverage and cabin positioning of the terminal, it is considered to place an integrated antenna base station equipment in five cabins every 200m to complete the coverage of the entire network.
     Because there is one equipment room every 200m inside the pipe gallery, there are fiber access points and access switches. The device can be easily connected to the internal network. The four cabins have also reserved pipes for routing each other, which is more convenient for construction.
Introduction to Fast Roaming Handover for Wireless Terminals:
    This system is designed to support fast roaming handover of wireless terminals. When wireless terminals operate in different cabins, they can quickly connect to the base station equipment in the cabin.
Coverage base station configuration instructions:
    1. The same SSID is used for the same radio frequency coverage, which is convenient for hand-held terminal equipment to roam and switch between base station equipment.
    2. Adjacent base stations use different channels, and the channels are staggered by more than 5 channels.
    3. The base station equipment is configured with a fast roaming mechanism for wireless terminals.

P4:Device connection topology diagram

Outdoor wireless devices
No. Destribe Model QTY Remark
1 Outdoor Wireless AP GP-AP1200 The main base station equipment is integrated with the antenna for coverage.
IP68 with power supply and Gigabit POE module
2 Centralized management platform GP-AC2000 1 Basic modules (authority management, partitioning and initialization, parameter batch distribution, parameter export, real-time status monitoring, load balancing, log management, system maintenance), batch centralized search, configuration and management of a large number of wireless APs and bridge devices in the network