The so-called micro base station should refer to the indoor station. The indoor base station has direct coupling signals from the macro station, and some directly add the base station in the equipment room for indoor distribution. The micro cell can be compared with the macro cell to understand. The function is similar to that of the macro station, except that its power is small, the coverage is small, and the coverage distance is between 100m-1Km. It can increase the system capacity. Generally, it is used in combination with the macro base station. It can be installed in places with heavy traffic and can increase the system. Capacity and quality, its pertinence is user density, because of the large number of users, the dense traffic is the installed micro-cell.
2, 2 / 3G have micro base stations, 3G is generally reflected in the form of independent RRU, such as ZTE's 8840 can be used alone as a source of capacity, can provide power through the baseband pool;
Small size, no need for machine room, easy to install; boards with different functions are generally integrated on the equipment, which is not convenient to maintain;
Covering ability: It can be installed near the antenna nearby, such as tower top and roof, directly connect the transmitting signal to the antenna end with jumper, the feeding cable is short, and the loss is small; the micro base station of the corresponding power amplifier can be selected according to the coverage requirement, and its coverage Not necessarily smaller than the macro base station;
Capacity: The micro base station has a limited volume, and the number of channel boards that can be installed is limited. Generally, only one carrier frequency can be supported, and the capacity that can be provided is small.
Network requirements: 2Mbps transmission (available for microwave or fiber).
Disadvantages: The outdoor conditions are poor, the reliability is not as good as the base station, and the maintenance is not convenient.
2, the application environmentDepth coverage: Coverage of small areas in urban areas, indoor coverage (eg as a source of indoor distribution systems), and coverage of pilot areas in urban areas.
Wide-area coverage: High-power micro-cells are used to cover wide-area coverage with small capacity requirements such as rural areas, townships, and highways.
Both the macro base station and the micro base station include three types: S1/1/1 (including S1, S1/1), OTSR, and O1.
Base station sector configuration applicable principle typical use area
The most important sector configuration of the three sectors can carry a high amount of traffic and is widely used in various regions. Omnidirectional stations such as urban areas, dense urban areas, and prosperous townships mainly address signal coverage; for areas with low traffic and limited coverage. Rural areas, mountain areas
Single-sector/two-sector primarily addresses signal coverage; for areas with explicit coverage requirements or traffic concentration. Main line of traffic, indoor coverage (underground parking lot, etc.)
OTSR (omnidirectional transmit sector reception) mainly solves signal coverage; for areas with clear coverage requirements, wide coverage, and low current traffic. Township, development zone, etc.
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