Terminal Device PDSCH Reception with TBS Scaling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing communication systems face challenges in efficiently receiving physical downlink shared channels (PDSCH) with transport block size (TBS) scaling in downlink transmission, particularly in non-terrestrial networks (NTN) where coverage performance is limited.
Innovation Solution
The proposed solution involves a communication method where a terminal device receives system information carrying first indication information and downlink control information (DCI) for scheduling a PDSCH. Based on this information, the terminal device receives the PDSCH for which TBS scaling is performed, allowing for accurate reception and improved coverage performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If TBS scaling is performed for PDSCH reception, then coverage performance is improved, but reception accuracy deteriorates
Solution Approach 1:
The patent applies preliminary action by performing TBS scaling before PDSCH reception. The terminal device determines the scaled TBS value in advance based on the received indication information, then uses this pre-calculated scaled TBS for accurate reception of the PDSCH. This preliminary determination of TBS scaling resolves the contradiction by establishing the correct reception parameters before the actual reception occurs, ensuring both coverage improvement and reception accuracy.
2Measurement precision
If indication information for TBS scaling is provided, then reception accuracy is improved, but system complexity increases
Solution Approach 1:
The patent extracts only the essential indication information needed for TBS scaling from the complex system information. Instead of providing comprehensive configuration details, the network device sends compact indication information (such as a flag or index) that the terminal device uses to determine the scaled TBS. This extraction of critical information reduces system complexity while maintaining reception accuracy.
Solution Approach 2:
The patent uses copying by referencing pre-defined TBS scaling relationships. Instead of transmitting complete TBS calculation parameters, the system transmits a compact indication that copies or references established TBS scaling patterns. The terminal device then applies these pre-established scaling relationships to determine the scaled TBS, reducing the information transmission overhead and system complexity.
Data Source
AI summary
A method for communication includes that: a terminal device receives system information, where the system information carries first indication information; the terminal device receives downlink control information (DCI) for scheduling a physical downlink shared channel (PDSCH), and the terminal device receives, based on at least one of the first indication information or the DCI, the PDSCH for which transport block size (TBS) scaling is performed. A method for communication performed by a network device, and a terminal device are also provided.