NR Transport Block Sizing With Overhead-Aware Resource Calculation
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Solution Overview
Problem
The data scheduling transport mode of the LTE system is difficult to be applied to the NR system due to the shorter scheduling delay and faster service start in NR, leading to a reduced success rate of data transmission.
Innovation Solution
A data transmission method that involves determining a Transport Block Size (TBS) by subtracting resource overheads such as PSFCH, CSI-RS, and TRS from scheduled resources, and sending or receiving information according to the determined TBS, thereby aligning understanding between sending and receiving ends to avoid demodulation failures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the LTE data scheduling transport mode is used in the NR system, then the system can maintain compatibility with existing LTE protocols, but the data transmission success rate decreases due to shorter scheduling delay and faster service start requirements
Solution Approach 1:
The patent changes the TBS determination parameters by introducing new overhead items specific to NR system (PSFCH, CSI-RS, TRS) into the TBS calculation formula. This allows the system to adapt NR's shorter scheduling delay and faster service start characteristics while maintaining the LTE-style TBS determination framework, thereby improving data transmission success rate without completely abandoning LTE protocol compatibility
Solution Approach 2:
The patent makes the TBS determination dynamic by allowing the communication device to calculate TBS based on actual scheduled resource quantity and dynamic overhead values. This dynamic adjustment mechanism enables the system to adapt to varying scheduling conditions in NR, improving transmission reliability under different service start timing scenarios
2Device complexity
If the TBS is determined without considering NR-specific overheads, then the calculation process remains simple and compatible with LTE, but demodulation failures occur due to inconsistent understanding between sending and receiving ends
Solution Approach 1:
The patent applies preliminary action by having the sending end determine the TBS before data transmission and notify the receiving end in advance. This allows the receiving end to pre-calculate the same TBS value using the new formula that includes NR-specific overheads, ensuring both ends have consistent understanding before demodulation begins, thereby preventing demodulation failures while maintaining relatively simple calculation complexity
Data Source
AI summary
A data transmission method and a device are provided. An exemplary data transmission method includes: determining a transport block size (TBS); and sending or receiving information according to the determined TBS.