What is a base station? Understand the role of a base station
The construction of mobile communication base stations is an important part of the investment of China mobile communication operators. The construction of mobile communication base stations generally focuses on Coverage, call quality, investment efficiency, ease of construction, ease of maintenance and other factors. As mobile communication network services develop in the direction of data and packetization, the development trend of mobile communication base stations must also be broadband, large-coverage construction and IP-based.
Base station in a narrow sense
A base station, that is, a public mobile communication base station, is a form of radio station. It refers to a mobile phone that operates in a certain radio coverage area through Mobile communications switching center, a radio transceiver station that transmits information between mobile phone terminals.
Base stations are applied for and set up by mobile communication operators.
What is a base station?
A base station allows mobile phones to have signals wherever they go, allowing them to make calls and send messages. Many times when taking the train, I have seen some tall and pointed iron frames, and there are some small houses next to them with moving signs on them. Those should be base stations.
In the above picture, the leftmost cabinet (with the door open) is the base station main equipment. Equipment, inside the middle cabinet is the backup battery system (which can maintain power supply for 5-8 hours when the base station is powered off), and on the far right is the backhaul optical fiber connection equipment.
Note: This base station is open-air. Generally, base stations are indoors. , this site is a bit willful.
Open the main equipment cabinet door of the base station and see several The bottom one is the Cisco switch (connected to the backhaul fiber connection equipment), the top one is the LTE equipment, processing LTE data services; the two middle ones are CDMA equipment, processing CDMA data services and voice Business. There are many main equipment manufacturers, such as Huawei, ZTE, Ericsson, NSN, etc. The equipment of different equipment manufacturers has different appearance, but the working principle is the same. The main equipment in the picture above is designed. It is Samsung Smart Multi-modal Base Stations (SMM-2LD000)
The base station signal passes The antenna above is used for transmitting and receiving. Usually, a base station has three directional antennas, each covering a 120-degree sector area. The two small boxes next to the antenna in the above picture are radio frequency amplifiers, which are used to amplify the base station. Signal.
This is the RF amplifier
The antenna and the base station are connected through feeders. This is the feeder connection at the antenna end.The thick layer of black tape on the outside is for waterproofing. Once the feeder gets water, it will affect the call quality.
❋ Tags: