Terminal Device One-Shot HARQ-ACK Feedback Delay Handling
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Solution Overview
Problem
In communication systems, determining whether an uplink channel meets the processing delay requirement for one-shot HARQ-ACK feedback is challenging when the DCI schedules or does not schedule a PDSCH, leading to potential failures in accurate transmission of HARQ-ACK information.
Innovation Solution
The method involves a terminal device receiving DCI with one-shot HARQ-ACK request information and transmitting the HARQ-ACK codebook through a target uplink channel only after meeting the delay requirement, or not transmitting if the requirement is not met, ensuring accurate feedback by determining the processing delay based on scheduling information provided in the DCI.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the terminal device transmits the target HARQ-ACK codebook through the target uplink channel without checking the delay requirement, then the transmission speed is improved, but the transmission accuracy deteriorates due to potential processing delay violations
Solution Approach 1:
The terminal device performs a preliminary check to determine whether the target uplink channel meets the processing delay requirement before transmitting the HARQ-ACK codebook. This preliminary action prevents transmission of invalid feedback and ensures that only timely and accurate HARQ-ACK information is sent, resolving the contradiction between transmission speed and accuracy by filtering out premature transmissions.
2Reliability
If the terminal device checks the delay requirement before transmission, then the transmission accuracy is improved, but the processing time increases due to the additional determination step
Solution Approach 1:
The patent employs a lightweight and efficient determination mechanism that uses readily available timing information and pre-configured parameters to quickly assess whether the processing delay requirement is met. This disposable-like approach uses minimal processing resources and time to make the determination, avoiding complex calculations while ensuring transmission accuracy.
3Productivity
If the DCI schedules a PDSCH, then the data transmission efficiency is improved, but the processing delay determination becomes more complex due to additional scheduling constraints
Solution Approach 1:
The patent segments the processing delay determination into distinct cases based on whether the DCI schedules a PDSCH or not. By dividing the determination logic into separate branches (one for PDSCH-scheduled cases and another for non-scheduled cases), the system handles each scenario with appropriate simplicity, avoiding the need to process all possible constraints simultaneously and thus reducing overall determination complexity.
Data Source
AI summary
Embodiments of the present application provide a communication method, a device and a storage medium. A network device instructs a terminal device to feed back a target HARQ-ACK codebook by carrying one-shot HARQ-ACK request information used to instruct the terminal device to perform uplink feedback in DCI, the terminal device transmits the target HARQ-ACK codebook to the network device through a target uplink channel after a delay requirement is met; or, when the delay requirement is not met, the terminal device does not transmit the target uplink channel, or the terminal device transmits the target uplink channel to the network device, but the target uplink channel does not include a valid target HARQ-ACK codebook. Through the method, processing delays when the DCI schedules a PDSCH and does not schedule a PDSCH can be determined, thus ensuring transmission of the one-shot HARQ-ACK information.