A baseband unit (BBU) is a device that interprets Baseband frequencies in telecom systems including computer networks, the internet, networks and radio broadcasting systems. A baseband frequency is a transmission at its original frequency, before it has been altered or modulated, and it usually has a frequency range close to zero.
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Mechanical engineers and telecom professionals use BBU devices to improve the connection between communication equipment. BBUs are manufactured with a modular design that allows them to perform multiple functions and fit easily into standard physical equipment. When data is passed from various points through a network to its end target, the BBU acts as a switchboard that connects the data to multiple locations (for instance, a Mobile Switching Office). Once a wireless signal is connected, it can be translated into information that is usable by an application or end user.
Typically, a BBU connects to a remote radio unit (RRU) or remote radio head (RRH), both of which are types of transceivers that facilitate wireless or wired connections with a radio station or other endpoint. These are sometimes also referred to as lowpass frequencies.
BBU devices are small and easy to incorporate into server rooms, business centers or any central location that allows them to act as a midpoint. Additionally, BBUs have low power consumption and are simple to deploy. This allows them to be easily implemented, replaced or updated within a telecom system.
When placed in an equipment room, BBUs are typically connected to the RRU using optical fiber. It is then responsible for communicating through a physical interface.
BBUs can come in a variety of shapes and implementations, including:
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Important Information about Radio Unit (RRU)
Radio Remote Unit (RRU) is the distributed and integrated frequency unit that connects to an operators network with the User Equipment&#;s (UE&#;s) like Cell and mobile devices.
The logical term &#;distributed and integrated&#; is because traditionally the radio architecture for cellular system is based on a single-standalone system (Base Stations) usually installed indoor but now, the cellular architecture is divided.
BTS (Base Transceiver Station) is the integration of various radio unit like BBU and RRU. Despite installing only in indoor , radio units are now installed in the tower below the Antenna.
The RRU is connected to the base station via the fiber optic link which is bi-directional link. The optical interface link is also known as CPRI(Common Public Radio Interface). CPRI is a interface protocol developed by combination of major telecom equipment&#;s manufacturing company.
The RRU helps to reduce the coaxial feed line losses, increase system efficiency and provide high level of flexibility in cellular site construction. Undoubtedly, this helps in upgrading to new equipment&#;s and devices more easily.
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