Random Access MCS Configuration for RedCap Terminal Coverage
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Solution Overview
Problem
The MCS table configuration during the random access procedure in reduced capability (redcap) terminals is not effectively addressed, leading to coverage loss and reduced data transmission quality.
Innovation Solution
A method for configuring an MCS table during the random access procedure based on terminal capability, indication messages, or preconfigured rules, ensuring the MCS table is set according to the terminal's capabilities and communication requirements, thereby enhancing coverage and improving data transmission reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the terminal uses a reduced capability configuration (fewer reception antennas), then the terminal complexity is reduced, but the coverage loss increases
Solution Approach 1:
The patent changes the MCS table configuration parameter based on terminal capability. For redcap terminals, a specific MCS table is configured that is adapted to their reduced capability, allowing optimal performance within their constraints rather than using standard tables designed for full-capability terminals.
Solution Approach 2:
The MCS table configuration is determined in advance during the random access procedure before actual data transmission. The terminal determines the appropriate MCS table based on its capability classification, and this configuration is established prior to communication, ensuring coverage enhancement from the outset.
2Device complexity
If the MCS table is not properly configured for redcap terminals during random access, then the device complexity remains low, but the data transmission quality deteriorates
Solution Approach 1:
The patent applies parameter changes by selecting different MCS table configurations based on terminal capability. The system transitions from a one-size-fits-all MCS table to capability-specific MCS tables, ensuring that redcap terminals use parameters optimized for their reduced capability, thereby maintaining high data transmission quality.
Solution Approach 2:
Different MCS table configurations are applied to different terminal types based on their capabilities. Instead of using a uniform configuration for all terminals, the system provides localized optimization where redcap terminals receive a specific MCS table tailored to their characteristics, improving their data transmission quality.
3Device complexity
If a standard MCS table is used for all terminals, then the system simplicity is maintained, but the coverage enhancement for redcap terminals is lost
Solution Approach 1:
The patent segments the MCS table configuration into different types based on terminal capability. Instead of using a single standard MCS table for all terminals, the system divides the configuration space into multiple MCS tables, each optimized for specific terminal categories including redcap terminals, thereby achieving coverage enhancement without excessive system complexity.
Solution Approach 2:
The MCS table configuration becomes dynamic rather than static. The terminal determines its capability classification and selects the appropriate MCS table during the random access procedure. This dynamic adaptation allows the system to provide coverage enhancement for redcap terminals while maintaining simplicity through automated capability-based selection.
Data Source
AI summary
A method for configuring a modulation and coding scheme (MCS) is performed by a terminal, and includes: determining an MCS table used by the terminal for part of channels during a random access procedure based on a designated scheme; wherein the designated scheme includes any one of: a scheme based on an indication message and a preconfigured rule.