8.1 CPRI/OBSAI Setup and Status
CPRI (Common Public Radio Interface) is an interface designed for the
communication inside the base station used for the mobile radio
communications.
OBSAI (Open Base Station Architecture Initiative) defines the architecture of the
cellular base station, including the interface between base band block and RF
block. In the OBSAI specifications, this interface is defined as RP3 (Reference
Point 3).
The nominal bit rates of CPRI and OBSAI are shown in the following table.
CPRI Line bit rates
Option
Bit Rate
(Mbit/s)
Multiplier ×
Reference bit rate ×
Coding (Mbit/s)
1 614.4 1 × 491.52 × 10/8
2 1228.8 2 × 491.52 × 10/8
3 2457.6 4 × 491.52 × 10/8
4 3072.0 5 × 491.52 × 10/8
5 4915.2 8 × 491.52 × 10/8
6 6144.0 10 × 491.52 × 10/8
7 9830.4 16 × 491.52 × 10/8
8 10137.6 20 × 491.52 × 66/64
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