5G NR TBS Calculation: Transport Block Size

5g
nr
tbs
transport block
size calculation

This page explains the 5G NR TBS (Transport Block Size) determination procedure. The TBS calculation relies on factors like Qm, R, v, and the number of REs (Resource Elements) as outlined in the 5G NR 38.214 standard.

This document provides the formulas and equations used in 5G NR TBS calculation.

5G NR Transport Block Size (TBS) Calculation | 5G NR TBS Determination Procedure

The following sections describe the 5G NR TBS determination procedure, including the formulas and equations used in the TBS calculation.

** Step-1:**

In the 5G NR standard, three tables (5.1.3.1-1, 5.1.3.1-2, and 5.1.3.1-3) specify the modulation order (Qm) and target code rate (R) based on the MCS Index (IMCS). For this calculator, we’ll directly input Qm and R for the TBS calculation.

** Step-2:**

NRE (Number of Resource Elements) is determined based on N’RE and nPRB. Here, N’RE represents the number of REs allocated for PDSCH (Physical Downlink Shared Channel) within a PRB (Physical Resource Block). We will directly use NRE as an input for the TBS calculator.

** Step-3:**

First, calculate Ninfo from NRE, R, Qm, and v using the following procedure for TBS (Transport Block Size) determination:

  • For Ninfo <= 3824: Follow procedure-1 (Step-3 in the PDF document).
  • For Ninfo > 3824: Follow procedure-2 (Step-4 in the PDF document).

** Refer to the PDF below for a complete understanding of 5G NR TBS determination or calculation:**

5G NR MCS and TBS Tables Explained

5G NR MCS and TBS Tables Explained

Explore 5G NR MCS (Modulation and Coding Scheme) and TBS (Transport Block Size) tables as defined in 3GPP TS 38.214 for 5G New Radio technology.

5g
nr
mcs
5G OTA Testing Basics and Solutions

5G OTA Testing Basics and Solutions

Explore the fundamentals of Over-The-Air (OTA) testing for 5G NR, including requirements, test methods, and Rohde & Schwarz solutions for accurate and efficient measurements.

5g
ota testing
radio frequency