Transport block size

icsd · 4G Newbie Joined: 30 May 2010 Posts: 1

Hi to all! I am a university student and my thesis is based on LTE !!
Could anybody tell me which is the size of a "transport block" ??

thank you very much!

colorado · 4G Newbie Joined: 21 Jul 2010 Posts: 2

The size of Transport Block (TBS) depend on several parameters:
1. Imcs - modulation and coding scheme index
2. Nprb - number of physical resource block

The parameter Imcs is mapped on Itbs(index of transport block size) according to TS 36.213

- for UL - Table 8.6.1-1
- for DL - Table 7.1.7.1-1

Then the value of TBS you can get from table where Nprb and Imcs are input parameters:

Table 7.1.7.2.1-1 (this table is for both UL and DL)

in other words, the size of TBS depend on current available resources in UE and eNodB and used modulation.