Baseband Unit (BBU)

A Baseband Unit (BBU) is a telecommunications device that processes baseband signals, which are the original frequencies of transmissions before any modulation. In a Radio Access Network (RAN), the BBU is responsible for managing and controlling the radio signal transmission and reception between the cell site equipment and the core network. It typically works with Remote Radio Heads (RRHs) to ensure efficient communication. The BBU performs functions such as converting signals from analog to digital, managing user data, session management, and mobility functions, as well as alarm monitoring and system clock operations[1][2][3].

Citations:

[1] https://www.techtarget.com/whatis/definition/baseband-unit-BBU

[2] https://www.viavisolutions.com/en-us/products/baseband-unit-bbu

[3] https://www.exfo.com/en/resources/glossary/baseband-unit/

[4] https://www.techopedia.com/definition/33908/baseband-unit-bbu

[5] https://www.devx.com/terms/baseband-unit/

[6] https://www.igi-global.com/dictionary/optical-networking-technologies-for-5g-services/118397

[7] https://en.wikipedia.org/wiki/Baseband

[8] https://www.telecomhall.net/t/what-is-rru-bbu-and-antenna/17891