SPS PDSCH Feedback Scheduling for HARQ-ACK Timing Accuracy
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless communication systems, deferring feedback information for Semi-Persistent Schedule (SPS) PDSCH leads to disorder of timing relationships and reduces transmission accuracy, as discussed in related art such as TCL COMMUNICATION: 'UE feedback enhancements for HARQ-ACK' and MODERATOR (NOKIA): 'Moderator summary #2 on HARQ-ACK feedback enhancements for NR Rel-17 URLLC/lloT'.
Innovation Solution
The terminal device determines feedback information associated with specific time domain units and PUCCH resources, deferring or clearing feedback information as necessary to maintain timing relationships and ensure accurate transmission, using pre-configured SPS PDSCH parameters to manage HARQ processes and PUCCH resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal device defers the sending of feedback information for SPS PDSCH, then the feedback information can be transmitted, but the timing relationship of the PDSCH becomes disordered, causing deferred feedback information to be sent after undeferred feedback information, which reduces transmission accuracy
Solution Approach 1:
The feedback information is segmented into different types (deferred feedback information and undeferred feedback information) and handled through separate determination processes. The terminal device determines feedback information for the first PDSCH separately from feedback information for the second PDSCH, allowing independent timing management for each segment to prevent timing disorder.
Solution Approach 2:
The terminal device performs preliminary determination of feedback information timing before actual transmission. By determining the timing relationship between first and second PDSCH and their corresponding feedback information in advance, the device can proactively adjust timing to prevent the disorder that would otherwise occur during deferred transmission.
2Productivity
If the terminal device sends feedback information according to the determined timing, then transmission timing is maintained, but deferred feedback information may be sent after undeferred feedback information, reducing transmission accuracy
Solution Approach 1:
The system implements a feedback mechanism where the terminal device determines whether feedback information has been successfully transmitted. If deferred feedback information is not successfully transmitted before the timing of undeferred feedback information, the terminal device clears the deferred feedback information to avoid sending it after undeferred feedback information, thereby maintaining transmission accuracy.
Solution Approach 2:
The timing relationship between feedback information transmissions is made dynamic rather than fixed. The terminal device adjusts the timing of deferred feedback information based on the actual transmission status and timing requirements of undeferred feedback information, allowing flexible adaptation to maintain both efficiency and accuracy.
Data Source
Figure 1~3
Figure 4~5
Figure 6
AI summary
The present application relates to the field of mobile communications, and discloses an information transmission method and apparatus, a device, and a storage medium. The method comprises: determining at least one piece of feedback information associated with a first time domain unit, the at least one piece of feedback information comprising unpostponed feedback information and postponed feedback information, the unpostponed feedback information comprising feedback information corresponding to a first SPS PDSCH, the postponed feedback information comprising feedback information that is not successfully transmitted in a second time domain unit, and the feedback information that is not successfully transmitted in the second time domain unit being feedback information corresponding to a second SPS PDSCH; determining at least one PUCCH resource according to the at least one piece of feedback information; and according to the at least one PUCCH resource, determining feedback information transmitted in the first time domain unit. According to the present application, it is ensured that the postponed feedback information does not affect the timing relationship of the PDSCHs, the accuracy of transmitting the feedback information is improved, and the stability of the transmission of the feedback information is also improved.