UTRAN Iub Interface General Frame Structure

The general structure of a Common Transport Channel frame between Node B and RNC consists of a header and a payload.

Header

Payload: Data or Control Information

General Frame Structure

There are two types of frames (indicated by the Frame Type field).

Data frame. Control frame. The general structure of frames Data frame example: DL FDD DSCH data frame structure CRC FT CFN TFI SF SP MC Info TB Cyclic Redundancy Checksum Frame Type Connection Frame Number Transport Format Indicator Spreading Factor Spare Multi Code to indicate the number of parallel PDSCH codes on which the DSCH data will be carried Transport Block Control frame example: Iub Common Transport Channel Control Frame Format