Terminal Device TBS Determination for Wireless Reliability
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Solution Overview
Problem
Current wireless communication systems face reliability and accuracy issues in short transmission time intervals (sTTIs) due to overheads from reference signal or control channel transmission, affecting user experience and system performance.
Innovation Solution
A method where a terminal device determines a first coefficient from a set of coefficients corresponding to a specific transmission time interval (TTI), allowing for adaptive selection based on current communication status to improve reliability and accuracy, by configuring coefficients for different overhead ranges, modulation and coding schemes, and frequency domain resource quantities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a fixed quantization coefficient is used for TTI less than 1 ms, then the TBS determination process is simplified, but communication reliability and accuracy deteriorate due to overheads from reference signal or control channel transmission
Solution Approach 1:
The patent applies dynamics by transitioning from a fixed quantization coefficient to a dynamic selection mechanism where multiple quantization coefficients are configured for different overhead ranges. The terminal device dynamically selects the appropriate coefficient based on the actual overhead conditions, making the system adaptable to varying communication scenarios while maintaining reliability.
Solution Approach 2:
The patent implements parameter changes by introducing multiple quantization coefficients (first quantization coefficient, second quantization coefficient, etc.) corresponding to different overhead ranges. The system changes the quantization parameter based on the actual overhead conditions, allowing flexible adaptation to different communication scenarios and improving both reliability and accuracy.
2Device complexity
If a fixed quantization coefficient is used for TTI less than 1 ms, then the system configuration is simplified, but communication accuracy deteriorates due to non-negligible impact of overheads
Solution Approach 1:
The patent applies segmentation by dividing the overhead range into multiple segments (first overhead range, second overhead range, etc.), with each segment having its own dedicated quantization coefficient. This segmentation allows the system to achieve high measurement precision for TBS determination by selecting the coefficient that best matches the actual overhead conditions, without significantly increasing overall system complexity.
Solution Approach 2:
The patent changes the quantization parameter based on the measured overhead conditions. By configuring multiple quantization coefficients and selecting the appropriate one based on the actual overhead range, the system achieves high communication accuracy while maintaining reasonable configuration complexity through standardized selection rules.
3Adaptability or versatility
If overheads from reference signal or control channel transmission are present in sTTI, then necessary communication functions are maintained, but TBS determination reliability and accuracy are affected
Solution Approach 1:
The patent implements feedback by having the terminal device measure the actual overhead in the sTTI and use this feedback information to select the appropriate quantization coefficient. The network device also provides overhead range indication as feedback, enabling the terminal to adapt its TBS determination to the actual communication conditions, thereby maintaining reliability despite the presence of overheads.
Solution Approach 2:
The patent makes the TBS determination process dynamic by allowing the terminal device to adaptively select different quantization coefficients based on the measured overhead conditions. This dynamic adaptation ensures that the system maintains high reliability and accuracy in TBS determination while accommodating the necessary communication overheads for reference signals and control channels.
Data Source
AI summary
A wireless communication method is provided. The method includes: determining, by a terminal device, a first coefficient, where the first coefficient belongs to a first coefficient set corresponding to a first transmission time interval TTI, the first coefficient set includes N coefficients, N≥2, and the N coefficients include at least two coefficients used for uplink transmission in the first TTI, or at least two coefficients used for downlink transmission in the first TTI; determining, by the terminal device, a first transport block size TBS based on the first coefficient; and performing, by the terminal device, wireless communication based on the first TBS in the first TTI. Reliability and accuracy of wireless communication can be improved.