NR Feedback Bit Determination via Delay Bounding
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Solution Overview
Problem
The New Radio (NR) system cannot support multiplexing transmission of Acknowledgement (ACK)/Negative Acknowledgement (NACK) due to the indeterminate length of feedback response information within a transmission time unit, specifically the number of bits for ACK/NACK feedback.
Innovation Solution
A method is provided to determine the total number of bits of feedback response information by calculating the difference between the maximum and minimum transmission delays, allowing for dynamic determination and transmission of ACK/NACK feedback, enabling multiplexing transmission in the NR system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If dynamic indication of HARQ timing is implemented in NR system, then flexibility of transmission timing is improved, but the length of feedback response information becomes indeterminate
Solution Approach 1:
The patent applies preliminary action by pre-configuring the maximum transmission delay parameter (K1) through higher layer signaling before actual HARQ feedback transmission. This allows the system to dynamically indicate HARQ timing while maintaining determinable feedback information length, as the maximum delay boundary is established in advance. The terminal uses this pre-configured parameter to determine the exact number of bits needed for feedback response information.
Solution Approach 2:
The patent changes the parameter approach by introducing a maximum transmission delay parameter (K1) that bounds the HARQ timing variability. Instead of allowing completely dynamic timing indication, the system uses this parameter to constrain the range of possible delays, enabling the terminal to calculate the required feedback bit length as N=C×(Tmax−Tmin). This parameter change resolves the contradiction by maintaining flexibility within bounded limits.
2Device complexity
If multiplexing transmission of ACK/NACK is not supported, then system complexity is reduced, but communication efficiency deteriorates
Solution Approach 1:
The patent applies segmentation by dividing the feedback response information into multiple bits, where each bit corresponds to a specific HARQ process or transmission block. The total number of bits is calculated as N=C×(Tmax−Tmin), creating a structured segmentation that enables multiplexing transmission. This segmentation allows multiple ACK/NACK responses to be transmitted efficiently within a single feedback message, improving communication efficiency while maintaining manageable system complexity through organized bit allocation.
Data Source
AI summary
A method for determining the length of feedback response information and a related product. The method comprises the following steps: a terminal receives configuration signaling sent by a network side device, the configuration signaling comprising: indicating the maximum transmission delay of feedback response information; the terminal dynamically determines a hybrid automatic repeat request feedback time sequence; the terminal determines the total number of bits of a feedback response message to be transmitted according to the maximum transmission delay; the terminal sends the feedback response message to be transmitted with the total number of bits to the network side device. The technical solution provided by the present invention has the advantage of supporting the multiplex transmission of feedback response information in one transmission time unit in a new radio system.