The Open Base Station Architecture Initiative specifies the internal interfaces of a Radio Base Station for opening the market for Base Station components and allowing distributed architecture of Base Stations.



OBSAI RP3 is an important fronthaul technology in 3G and 4G networks

Open Base Station Architecture Initiative was a trade association created by Hyundai, LG Electronics, Nokia, Samsung, and ZTE in September 2002 with the aim of creating an open market for cellular network base stations. An open market and modular approach for base station components would reduce the development effort and costs traditionally associated with creating base station products.

Sarokal products mainly focus on the Reference Point 3 (RP3) and RP3-01 portions of the OBSAI standard, as these two are relevant for cellular data transfer and timing synchronization between Radio Base Station components. RP3 is used in antenna and control messages between a Base Band Unit (BBU) and a Local Converter (LC). 

The RP3-01 interface realizes a high speed optical communication link between the Local Converter (LC) module and the Remote Radio Head (RRH).

The OBSAI specification defines line bit rates from 768 Mbps to 6.144 Gbps (1 to 8X modes).

Visit the OBSAI website for more information about the specification.