2. Disadvantages are that equipment manufacturers have different levels of support, and the construction cost is high. Before construction, it is necessary to specify the network standard and frequency band to be supported. The far end is an active device, which needs independent power supply or power supply through five or six types of wires, so it is not suitable for difficult, closed and humid scenes.
Pico-base stations are divided into integrated pico-base stations and extended pico-base stations, as well as single carrier frequency and dual carrier frequency.