HARQ Feedback Codebook Segmentation for Uplink Grant Timing
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently handling HARQ feedback for downlink transmissions scheduled before and after an uplink grant, leading to inefficiencies and increased feedback delay.
Innovation Solution
The proposed solution involves dividing the HARQ feedback codebook into two sub-codebooks, one for downlink transmissions before the uplink grant and another for those after, allowing for separate handling and transmission in the same uplink slot, thereby enhancing system transmission efficiency and reducing feedback delay.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a single codebook is used for HARQ feedback transmission, then the feedback structure is simple, but the feedback delay increases and transmission efficiency decreases
Solution Approach 1:
The patent divides the HARQ feedback codebook into two separate sub-codebooks: one for downlink transmissions before the uplink grant and another for downlink transmissions after the uplink grant. This segmentation allows independent processing and transmission of feedback for different time periods, reducing overall feedback delay and improving transmission efficiency by enabling more flexible resource allocation and timing.
2Adaptability or versatility
If feedback for all downlink transmissions is handled in a single uplink transmission, then the feedback process is simple, but the system cannot efficiently handle both pre-grant and post-grant transmissions
Solution Approach 1:
The codebook is segmented into sub-codebooks based on the timing relationship with the uplink grant, enabling the system to adaptively handle different transmission scenarios. This segmentation provides versatility in feedback handling while maintaining manageable complexity through structured organization.
Solution Approach 2:
The patent introduces dynamic characteristics to the feedback mechanism by allowing different codebook configurations based on whether downlink transmissions occur before or after the uplink grant. This dynamic adaptation enables the system to flexibly respond to varying transmission schedules and timing requirements.
Data Source
AI summary
The present disclosure relates to systems, apparatuses, non-transitory computer-readable media, and methods for sending, by a network to a wireless communication device, downlink transmissions, and receiving, by the network from the wireless communication device, feedback information for the downlink transmissions in an uplink transmission scheduled by a first Downlink Control Information (DCI). The feedback information corresponds to or includes a codebook, which includes at least one of, a first sub-codebook and a second sub-codebook based on reception time of a first DCI.