Terminal CSI Computation for PDSCH Resource Mismatch
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Solution Overview
Problem
In the new radio (NR) transmission system, the inaccurate computation of channel state information (CSI) due to changes in transmission resources affects the performance of the physical downlink shared channel (PDSCH) and leads to resource wastage, as the existing methods assume consistent resources for CSI computation that do not match the actual PDSCH transmission resources.
Innovation Solution
A method is provided where the terminal determines the number of resources for PDSCH transmission based on subcarrier spacing or received information, and then computes CSI accurately, ensuring that the CSI is determined based on the actual resources used for PDSCH transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the existing CSI computation method is used, then the computation process is simple, but the CSI accuracy deteriorates because the assumed resources are inconsistent with actual PDSCH transmission resources
Solution Approach 1:
The patent applies dynamics by making the CSI computation adaptive to changing transmission conditions. The terminal device dynamically adjusts the CSI computation based on whether the PDSCH transmission uses mini-slot or slot-based resources, rather than using a fixed computation method. This dynamic adaptation resolves the contradiction by allowing the system to maintain simple computation when possible while achieving accurate CSI when transmission resources change.
Solution Approach 2:
The patent changes the computation parameters based on the actual PDSCH transmission resources. When mini-slot-based PDSCH transmission is detected, the terminal adjusts the resource assumption parameters for CSI computation to match the actual transmission resources. This parameter adjustment ensures CSI accuracy without requiring a completely complex new computation framework, as it builds upon existing methods with targeted parameter modifications.
2Productivity
If the existing CSI computation method is used, then the computation is fast, but resource wastage occurs due to inaccurate CSI leading to suboptimal PDSCH transmission
Solution Approach 1:
The patent applies preliminary action by having the terminal device determine the actual PDSCH transmission resources before computing CSI. The terminal first identifies whether the PDSCH uses mini-slot or slot-based resources, then uses this information to guide the CSI computation process. This preliminary determination prevents resource wastage by ensuring CSI is computed with correct resource assumptions from the outset, avoiding the need for time-consuming re-computation or correction later.
3Reliability
If the existing CSI computation method is used, then the system is easy to operate, but transmission performance deteriorates due to resource inconsistency between CSI assumption and actual PDSCH transmission
Solution Approach 1:
The patent applies self-service by enabling the terminal device to autonomously determine and adjust CSI computation parameters based on the actual PDSCH transmission resources it receives. The terminal independently identifies whether mini-slot or slot-based transmission is used and automatically adjusts its CSI computation accordingly, without requiring complex network configuration or manual intervention. This self-adjusting mechanism maintains operational simplicity while significantly improving transmission reliability.
Data Source
AI summary
The application provides a method, apparatus for transmitting HARQ-ACK information, electronic device and storage medium. The method includes: determining, by a terminal, a TU in which a PUCCH transmitting the HARQ-ACK is located according to a length of the time slot in which the PUCCH transmitting the HARQ-ACK is located and the number of PUCCHs in the time slot; transmitting, by the terminal, the HARQ-ACK information based on the determined TU in which the PUCCH transmitting the HARQ-ACK is located and a corresponding HARQ timing relationship.