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5G NR TBS calculation | 5G NR Transport Block size Calculation

This page mentions 5G NR TBS determination procedure. The TBS (Transport Block Size) calculation is based Qm,R,v and number of REs mentioned in 5G NR 38.214 standard. The formula or equations used in 5G NR TBS calculation are also mentioned.

5G NR Transport Block size (TBS) Calculation | 5G NR TBS determination procedure

The following paragraph covers 5G NR TBS determination procedure including formula or equations are used in 5G NR TBS calculation.
➤Step-1: In the 5G NR standard there are three tables 5.1.3.1-1, 5.1.3.1-2 and 5.1.3.1-3 which gives modulation order (Qm) and target code rate (R) based on MCS Index (IMCS). In the calculator we will be taking Qm and R directly for TBS calculation.
➤Step-2: NRE is determined based on N'RE and nPRB. Here N'RE is the number of REs allocated for PDSCH within a PRB (physical resource block). We will be taking NRE directly for TBS calculator.
➤Step-3: First calculate Ninfo from NRE, R, Qm and v and use following procedure used for TBS (Transport Block Size) determination. For Ninfo <=3824 follow procedure-1 (Step-3 in the pdf document) and Ninfo > 3824 follow procedure-2 (Step-4 in the pdf document).
➤Follow pdf mentioned below for complete understanding of 5G NR TBS determination or calculation.




5G NR TECHNOLOGY RELATED LINKS

This 5G tutorial also covers following sub topics on the 5G technology:
5G Index Page
5G basic tutorial
5G NR Physical layer
5G NR Slot Formats
5G NR SSS
5G NR PRACH
5G NR PDCCH
5G NR PUCCH
5G Reference Signals

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