Jun 172009
The MAC layer generates a new transport block every 10-ms (or multiple of blocks.)
A set of simultaneous transport blocks is the transport block set.
The transmission time interval (TTI) is the duration of each transport block set.
This can be 10, 20, 40, 80 ms.
TTI does not tell you data size. It tells you how often the transport channel data rate can be changed.


