eRedCap Small Data Transmission Thresholds for Lower Power Delay
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In enhanced reduced capability (eRedCap) terminals, the lack of accurate link quality state during inactive state transmission leads to high power consumption and transmission delay due to conservative modulation and coding schemes, especially when data volume exceeds configured thresholds.
Innovation Solution
Introduce a separate SDT transmission threshold for eRedCap terminals, allowing them to determine whether to perform SDT based on individual thresholds, ensuring reasonable scheduling and reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conservative modulation and coding scheme (MCS) is used for Msg3 transmission in inactive state, then transmission reliability is improved, but power consumption and transmission delay increase
Solution Approach 1:
The patent introduces separate first and second thresholds specifically for eRedCap terminals, distinguishing them from non-eRedCap terminals. By adjusting threshold parameters based on terminal capability, the system enables eRedCap terminals to perform SDT when data volume exceeds the first threshold, avoiding conservative MCS and reducing power consumption while maintaining reliability through appropriate threshold-based scheduling
2Reliability
If a conservative modulation and coding scheme (MCS) is used for Msg3 transmission in inactive state, then transmission reliability is improved, but transmission delay increases
Solution Approach 1:
The patent introduces separate first and second thresholds specifically for eRedCap terminals, distinguishing them from non-eRedCap terminals. By adjusting threshold parameters based on terminal capability, the system enables eRedCap terminals to perform SDT when data volume exceeds the first threshold, reducing transmission delay while maintaining reliability through appropriate threshold-based scheduling
3Device complexity
If a unified threshold is used for both eRedCap and non-eRedCap terminals, then system simplicity is maintained, but eRedCap terminal scheduling performance deteriorates
Solution Approach 1:
The patent applies local quality by introducing terminal-specific thresholds: a first threshold for eRedCap terminals and a second threshold for non-eRedCap terminals. This allows each terminal type to be scheduled according to its specific capabilities, improving eRedCap terminal performance without significantly increasing overall system complexity, as the differentiation is based on terminal capability identification
Data Source
Figure 1~4
Figure 5~8
Figure 9~12
AI summary
Embodiments of the present application disclose a small data transmission (SDT) method and apparatus. The method comprises: in response to an enhanced reduced capability (eRedCap) terminal supporting SDT, determining a first threshold, and determining, according to the first threshold, whether to perform SDT; or in response to the eRedCap terminal not supporting SDT, triggering a random access channel (RACH) procedure to enter a connected state. An independent SDT threshold is introduced to the eRedCap terminal, thereby avoiding affecting SDT of non-eRedCap terminals, and ensuring reasonable scheduling of eRedCap terminals.