DMRS RE Mapping for Accurate Transport Block Size Calculation
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Solution Overview
Problem
The challenge in determining the quantity of resource elements (REs) occupied by demodulation reference signals (DMRS) for data block transmission in communication systems, which is crucial for calculating the transport block size (TBS), has not been adequately addressed in existing technologies.
Innovation Solution
A method is proposed where a predefined correspondence between various types of information, such as DCI format, DMRS configuration, and symbol positions, is established to determine the quantity of REs occupied by DMRS, allowing the base station and user equipment to calculate the TBS based on this correspondence.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the quantity of REs occupied by DMRS is not accurately determined, then the TBS calculation is inaccurate, but establishing a predefined correspondence requires additional system complexity
Solution Approach 1:
The patent establishes a predefined correspondence between DMRS-related parameters (DCI format, DMRS configuration type, symbol position, quantity of symbols) and the quantity of REs occupied by DMRS before actual data transmission. This preliminary establishment of mapping relationships eliminates the need for complex real-time calculations during TBS determination, thereby achieving accurate TBS calculation without increasing operational system complexity
Solution Approach 2:
The patent creates a standardized mapping model (correspondence table) that copies and stores the relationships between various DMRS parameters and RE quantities in advance. Both the base station and user equipment use this pre-copied correspondence to quickly determine DMRS RE occupancy, avoiding repeated complex calculations and ensuring consistent TBS computation at both ends
2Productivity
If DMRS overhead is not accurately accounted for, then data transmission efficiency is reduced, but determining RE quantity requires additional processing steps
Solution Approach 1:
The patent performs the complex task of determining DMRS RE occupancy in advance by establishing a predefined correspondence based on DCI format, DMRS configuration type, symbol position, and quantity of symbols. This preliminary determination allows the system to quickly account for DMRS overhead during TBS calculation without adding processing complexity during actual data transmission operations
Solution Approach 2:
The patent changes the approach from dynamic calculation to parameter-based lookup by introducing a predefined correspondence that maps specific parameters (DCI format, DMRS configuration type, symbol position, quantity of symbols) to DMRS RE quantities. This parameterization simplifies the processing by transforming a complex calculation problem into a straightforward parameter matching and retrieval operation
Data Source
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AI summary
This application provides a method for obtaining a quantity of resource elements in a communication process and a related apparatus. The method includes: obtaining first information, where the first information includes at least one type of the following information: a downlink control information format, a configuration type of a demodulation reference signal, DMRS, a quantity of symbols occupied by the DMRS, a waveform, a radio network temporary identifier scrambling manner of downlink control information, a data channel type, a quantity of symbols occupied by a data block, and a position of a symbol occupied by the data block; and obtaining, based on the first information, a quantity, corresponding to the first information, of resource elements occupied by the DMRS, where there is a correspondence between the first information and the quantity of resource elements occupied by the DMRS. According to the method for obtaining a quantity of resource elements in a communication process and the related apparatus that are provided in this application, the quantity of REs occupied by the DMRS can be determined. This helps determine a TBS, and further helps ensure communication reliability.