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The main content of this article is to explain "what is a bbu device". Interested friends may wish to have a look. The method introduced in this paper is simple, fast and practical. Let's let the editor take you to learn what a bbu device is.

BBU is indoor baseband processing unit. Indoor baseband processing unit uses distributed base station architecture extensively in 3G network. Optical fiber connection is needed between RRU and BBU. A BBU can support multiple RRU; to adopt BBU+RRU multi-channel scheme, which can well solve the indoor coverage of large stadiums.

The operating environment of this tutorial: windows7 system, Dell G3 computer.

BBU is indoor baseband processing unit. Indoor baseband processing unit (Building Base band Unite) widely uses distributed base station architecture in 3G network. Optical fiber connection is needed between RRU (radio frequency stretch module) and BBU (baseband processing unit). A BBU can support multiple RRU. The use of BBU+RRU multi-channel scheme can well solve the indoor coverage of large stadiums.

Introduction to the main functions of BBU: BBU is the baseband processing unit of the base station, which provides external interface and completes the functions of resource management, operation and maintenance and environmental monitoring of the system. The BBU includes a main control unit FSMF module, a baseband expansion unit FBBA and a transmission expansion unit FTIF.

Characteristics of BBU:

Usually, the indoor distribution system adopts the electric distribution mode of cable, while the BBU+RRU scheme adopts the distribution mode of optical fiber transmission. The baseband BBU (BuildingBasebandUnite indoor baseband processing unit) is centrally placed in the computer room, the RRU (Rera () teRadiOUnite remote RF module) can be installed to the floor, the optical fiber transmission is used between BBU and RRU, and the RRU is connected to the antenna through coaxial cable and power divider (coupler), that is, optical fiber is used in the backbone and coaxial cable is used in the branch.

Unique multi-channel algorithm to achieve spatial isolation, can reduce interference; coverage and capacity can be planned independently; reduce dependence on trunk amplifiers; baseband capacity can be shared, large capacity expansion; fiber lossless, backbone deployment is simple, RRU deployment is flexible. But the disadvantage is that the photoelectric conversion unit needs to be added, and the optical fiber is easy to be damaged, so it needs to be sheathed. The difference between TD-SCDMA indoor distribution system and other 3G is time division duplex (TD-SCDMA), WCDMA and cdma2000 are frequency division duplex (FDD), and the technical system of air interface is also different, so its indoor distribution system is also different.

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