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What is the difference between BBU and RRU ?

What is the difference between BBU and RRU ?

RRU  : Remote Radio Unit


BBU : Building Baseband Unit


The RRU is the remote radio frequency module of the Remote Radio Unit, and the BBU is the indoor baseband processing unit of the Building Baseband Unit.


The baseband BBU is centrally placed in the equipment room, and the RRU can be installed on the floor. 


Optical fiber is used for transmission between the BBU and the RRU. 


The RRU is then connected to the antenna through coaxial cables and power dividers (couplers), that is, the trunk uses optical fiber, and the branch uses the same fiber.  


For the downlink direction: the optical fiber is directly connected from the BBU to the RRU, and the baseband digital signal is transmitted between the BBU and the RRU, so that the base station can control the signal of a certain user to be transmitted from the designated RRU channel, which can greatly reduce the impact on other channels in the cell. 


For the uplink direction: the user's mobile phone signal is received by the channel closest to the distance, and then transmitted from this channel to the base station through the optical fiber, which can also greatly reduce the interference between users on different channels.


Premier Cable is a factory based in Dong Guan City to make cable for base station antennas, Remote Radio Unit,  Building Baseband Unit


We make Remote Radio Unit Cable ,  Building Baseband Unit Cable,   See more at 


Tel : 0086-0139-2949-7934


Skype : james198585 


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