Shared Channel TBS Calculation Under PRS Resource Occupancy
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Solution Overview
Problem
The challenge of determining an accurate transport block size (TBS) in a slot that includes a positioning reference signal (PRS) transmission is not adequately addressed, affecting data transmission performance in applications requiring high accuracy.
Innovation Solution
A method to determine the TBS based on the quantity of resources occupied by the PRS within a frequency domain unit, considering time or frequency division multiplexing, and using higher layer signaling or predefined configurations to ensure accurate resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the TBS is determined without considering the quantity of time domain subunits occupied by the PRS, then the calculation process is simpler, but the TBS determination accuracy deteriorates and transmission performance is affected
Solution Approach 1:
The patent applies preliminary action by pre-configuring or pre-defining the quantity of time domain subunits occupied by the PRS through higher layer signaling. This allows the receiving device to obtain this parameter in advance before TBS calculation, enabling accurate resource quantity determination without complex real-time measurements, thus resolving the contradiction between calculation simplicity and accuracy.
2Productivity
If the PRS and the physical shared channel are multiplexed in the same time domain unit, then resource utilization is improved, but the TBS determination becomes more difficult due to resource overlap
Solution Approach 1:
The patent applies segmentation by dividing the time domain unit into distinct portions: time domain subunits occupied by the PRS and time domain subunits available for the physical shared channel. This segmentation allows the receiving device to separately identify and calculate resources allocated to each signal type, making TBS determination feasible even when PRS and data are multiplexed in the same time domain unit.
Solution Approach 2:
The patent applies local quality by determining the resource quantity of the physical shared channel within a specific frequency domain unit, considering the local occupancy of time domain subunits by the PRS. This localized approach allows accurate TBS calculation for specific resource blocks while accounting for PRS interference in particular time subunits, resolving the contradiction between resource multiplexing and measurement difficulty.
Data Source
AI summary
Embodiments of this application provide a data transmission method and a communication apparatus. According to this application, a first device can determine, based on a quantity of time domain subunits occupied by a PRS, a quantity of resources of a first physical shared channel within a first frequency domain unit, and determine, based on the quantity of resources of the first physical shared channel within the first frequency domain unit, a TBS of a first TB transmitted on the first physical shared channel, to improve accuracy of the determined TBS and improve transmission performance.