HARQ Feedback Timing Determination in Limited Uplink Resources
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In existing communication systems, the determination of the time position for hybrid automatic repeat request (HARQ) feedback information is challenging due to limited uplink time domain resources, leading to unreliable transmission of HARQ feedback.
Innovation Solution
The proposed method involves a terminal device determining the time position of HARQ feedback information based on indication information, where the value indicated by the indication information is greater than the timing indication domain from the physical downlink shared channel (PDSCH) to HARQ feedback information in downlink control information (DCI), or following a predefined rule, ensuring accurate placement and reliable transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the timing indication domain in DCI is used to determine HARQ feedback timing, then the determination method is simple, but the uplink time domain resources are limited and transmission reliability is insufficient
Solution Approach 1:
The patent segments the timing indication into two parts: the original timing indication domain in DCI and the new indication information. This segmentation allows the system to use both the simple DCI field and the additional indication information to jointly determine the time position, thereby improving reliability without excessive complexity
Solution Approach 2:
The patent introduces a new dimension for timing indication through the indication information, which provides additional time unit interval values beyond what the original DCI timing indication domain can provide. This dimensional expansion allows for more flexible and reliable HARQ feedback timing determination
2Measurement precision
If the time position for HARQ feedback is determined using existing timing indication domain, then the signaling overhead is low, but the accurate placement of HARQ feedback cannot be ensured under limited uplink resources
Solution Approach 1:
The indication information acts as an intermediary that bridges the gap between the limited uplink resources and the need for accurate HARQ feedback placement. It provides additional timing values that help determine the optimal time position when uplink resources are constrained
Solution Approach 2:
The patent changes the timing parameter by introducing new time unit interval values through the indication information. This parameter expansion allows for more precise time position determination that adapts to the actual uplink resource availability
Data Source
AI summary
A timing method for determining hybrid automatic repeat request (HARQ) feedback information, and the method includes: determining, by a terminal device, a time position where the HARQ feedback information is located according to indication information indicating that a value number is greater than a value indicated by a timing indication domain from a physical downlink shared channel (PDSCH) to the HARQ feedback information in downlink control information (DCI), or determining a time position where the feedback information is located according to indication information configured to instruct a terminal device according to a predefined rule.