MCS Lookup Table Entries for Direct Transport Block Size Control
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Solution Overview
Problem
In 5G New Radio (NR) wireless communication systems, achieving a desired transport block size (TBS) is challenging due to spectral efficiency issues and limitations in modulation and coding scheme (MCS) entries, which can lead to difficulties in resource allocation and performance degradation.
Innovation Solution
The introduction of explicit TBS entries in the MCS lookup table allows for direct specification of a desired TBS, enabling variable spectral efficiency and overcoming the limitations of existing MCS entries, allowing for explicit TBS indication and allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional MCS lookup table methods are used to determine transport block size, then the system maintains backward compatibility and simple operation, but achieving a desired TBS becomes difficult and spectral efficiency deteriorates
Solution Approach 1:
The MCS lookup table is segmented into two distinct parts: traditional MCS entries for backward compatibility and new explicit TBS entries for precise TBS specification. This segmentation allows the system to maintain existing operations while adding new capability without interfering with each other.
Solution Approach 2:
The patent adds a new dimension to the MCS table structure by introducing explicit TBS values as a separate column or field alongside the existing modulation order and coding rate parameters. This dimensional expansion enables direct TBS specification without disrupting the original table structure.
2Productivity
If explicit TBS entries are added to the MCS lookup table, then desired TBS can be achieved with improved spectral efficiency, but the MCS table structure and operation complexity increases
Solution Approach 1:
The enhanced MCS lookup table structure serves multiple functions simultaneously: it maintains traditional MCS determination operations for backward compatibility while also enabling explicit TBS specification for improved spectral efficiency. The same table infrastructure supports both old and new functionalities.
Solution Approach 2:
The system automatically selects between traditional MCS entries and explicit TBS entries based on the configuration and requirements, without requiring manual intervention or complex external control mechanisms. The scheduler autonomously determines the appropriate entry type.
3Adaptability or versatility
If traditional MCS entries are used without explicit TBS indication, then the system operates with simple lookup operations, but resource allocation flexibility and performance are compromised
Solution Approach 1:
The explicit TBS values are pre-calculated and stored in the MCS lookup table during system configuration or initialization. This preliminary action eliminates the need for complex real-time calculations during scheduling operations, allowing fast retrieval of precise TBS values.
Data Source
AI summary
Certain aspects of the present disclosure provide techniques for wireless communication. An exemplary method generally includes receiving an indication of a modulation and coding scheme (MCS) to use for transmitting information, wherein the indication of the MCS indicates an MCS index value corresponding to an entry in an MCS lookup table, determining, based on the MCS index value, a transport block size (TBS) to use for transmitting the information, wherein determining the TBS comprises receiving an explicit indication of the TBS to use for transmitting the information, and transmitting the information using the MCS and TBS.