Unified TCI Acknowledgment for Multi-TRP DCI and PDSCH
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Solution Overview
Problem
Existing wireless systems face challenges in efficiently acknowledging successful transmission of configurations and parameters, particularly in scenarios involving multiple downlink control information (DCI) transmissions and unified Transmission Configuration Indicator (TCI) configurations.
Innovation Solution
The proposed solution involves separate acknowledgments for each DCI transmission with unified TCI and for PDSCH transmissions, with HARQ-ACK codebooks incorporating bits for successful reception of DCI and unified TCI. Acknowledgments are sent based on predetermined conditions being met.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate acknowledgments are sent for each DCI transmission with unified TCI, then reliability of transmission acknowledgment is improved, but signaling overhead and system complexity increase
Solution Approach 1:
The patent segments the acknowledgment mechanism into two distinct parts: DCI-ACK for acknowledging DCI reception and HARQ-ACK for acknowledging PDSCH reception. This segmentation allows each acknowledgment to be handled independently with appropriate reliability guarantees, resolving the contradiction by improving overall reliability while maintaining manageable complexity through structured separation of functions.
Solution Approach 2:
The patent introduces an intermediary mechanism where the DCI-ACK serves as a preliminary acknowledgment that confirms receipt of DCI before the actual data transmission. This intermediary step provides reliability enhancement without requiring complete redesign of the entire acknowledgment system, as it works in conjunction with the existing HARQ-ACK mechanism.
2Reliability
If separate acknowledgments are sent for each DCI transmission and PDSCH transmission, then transmission reliability is improved, but signaling overhead increases
Solution Approach 1:
The patent merges the DCI-ACK and HARQ-ACK into a unified codebook structure where both acknowledgment types are transmitted together in a single uplink message. This merging reduces signaling overhead by consolidating multiple acknowledgment streams into one transmission while still maintaining the reliability benefits of separate acknowledgment handling for each DCI and PDSCH.
Solution Approach 2:
The unified codebook structure serves multiple functions simultaneously: it acknowledges DCI reception, acknowledges PDSCH reception, and provides a scalable framework that can accommodate different numbers of DCI transmissions. This multi-functionality reduces overall signaling overhead by eliminating the need for separate dedicated acknowledgment messages for each function.
3Productivity
If unified TCI configuration is applied across multiple DCI transmissions, then system efficiency is improved, but difficulty in detecting and measuring reception status increases
Solution Approach 1:
The patent applies local quality by providing separate acknowledgment handling for each DCI transmission even though the same unified TCI configuration is used across multiple DCIs. This allows the system to maintain efficient unified TCI configuration while still enabling precise local detection of reception status for each individual DCI through dedicated DCI-ACK bits in the codebook.
Data Source
AI summary
Systems, methods, and devices for one or more acknowledgment mechanisms for unified Transmission Configuration Indicator (TCI) and one or mor transmission reception point. In one example, a separate acknowledgement may be sent for each one of multiple downlink control information (DCI) transmissions with unified TCI, as well as a separate single acknowledgment for the one or more PDSCH transmissions related to each of the multiple DCI transmissions. In one or more of the acknowledgments, a HARQ-ACK codebook may include at least one HARQ-ACK bit based on reception of a PDSCH scheduled by at least one DCI and at least one bit based on successful reception of at least one DCI indicating the unified TCI(s). Reporting the separate acknowledgement may be based on when one or more predetermined, and/or configured, conditions are met.