Since the size of transport block is not fixed, often a question comes to mind as to how transport block size is calculated in LTE. This layer will pass on the data to the next layer i. RLC Layer which will concatenate it forex склад one RLC PDU.
RLC layer will concatenate or segment the data coming from PDCP layer into correct block size and forward it to the MAC layer with its own header. Now MAC layer selects the modulation and coding scheme configures the physical layer. The data is now in the shape of transport block size and needed to be transmitted in 1ms subframe. We have to refer to the Table 7. CQI and other information for downlink transmission on PDSCH. Now the value of TBS index is 18 as seen in Table 7.
After knowing the value of TBS index we need to refer to the Table 7. Only portion of the table is shown here while for the complete range of values refer to 3gpp document 36. Transport block size as we calculated from Table 7. How is CRC bits caliculated to 24 bits in above example? Hi Venkat please refer to 3gpp 36. I like it extremely varied and provide information that helps you in finding new information. Is the coding rate fixed ?