Type-3 HARQ-ACK Codebook Triggering by DCI for UE Feedback
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Solution Overview
Problem
The increasing complexity and diversity of next-generation wireless communication systems, including 5G and 6G networks, pose challenges in managing Hybrid Automatic Repeat Request (HARQ) feedback due to the variety of devices and data demands, leading to inefficiencies in network resource utilization.
Innovation Solution
Enhanced UE configuration for HARQ-ACK codebook triggering using DCI format to optimize HARQ feedback processes, improving network efficiency and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If HARQ feedback processes are enhanced to improve network reliability, then network reliability is improved, but device complexity increases
Solution Approach 1:
The patent segments the HARQ feedback process into different types (Type 1, Type 2, Type 3 codebooks) with distinct triggering mechanisms and feedback content. This segmentation allows the system to manage complexity by processing feedback in organized categories rather than as a monolithic process, improving reliability through comprehensive coverage while maintaining manageable device complexity through structured organization.
Solution Approach 2:
The patent implements dynamic triggering mechanisms where DCI formats dynamically select which HARQ feedback type to send based on real-time scheduling decisions. The system transitions from static feedback configurations to dynamic adaptive feedback, allowing the network to optimize reliability by sending feedback only when needed based on current channel conditions and scheduling requirements.
2Productivity
If HARQ-ACK codebook triggering is optimized to improve network efficiency, then network efficiency is improved, but ease of operation decreases
Solution Approach 1:
The patent implements comprehensive feedback mechanisms where the network sends DCI formats with explicit triggering information to the UE. This feedback loop allows the system to optimize network efficiency by dynamically adjusting feedback based on channel conditions while maintaining ease of operation through clear, standardized triggering signals that automatically guide the UE behavior without manual configuration.
Solution Approach 2:
The patent utilizes parameter changes in DCI formats (such as priority indicators, triggering flags, and codebook type selections) to optimize network efficiency. By dynamically modifying these parameters based on current network conditions, the system achieves improved productivity while maintaining ease of operation through automated parameter adjustment rather than manual intervention.
3Productivity
If network resource utilization is improved through enhanced HARQ processes, then network resource utilization is improved, but device complexity increases
Solution Approach 1:
The patent creates a universal HARQ feedback framework where a single codebook structure can serve multiple purposes through different triggering mechanisms. The same basic feedback process can be activated for different scenarios (initial connection, reconnection, handover, suspension) making the system multi-functional. This universality improves network resource utilization by consolidating feedback mechanisms while managing device complexity through shared infrastructure.
Solution Approach 2:
The patent implements preliminary configuration where HARQ feedback parameters and codebook structures are pre-configured through RRC signaling before actual feedback transmission occurs. This preliminary setup allows the system to optimize network resource utilization during operation without increasing device complexity, as the complex configuration is performed once during setup rather than continuously during operation.
Data Source
AI summary
An apparatus and system are described to provide enhanced Type-3 HARQ-ACK codebook transmission are described. A gNB configures a UE for hybrid automatic repeat request (HARQ)-acknowledgment (ACK) (HARQ-ACK) retransmission using the enhanced Type-3 codebook using radio resource control signaling. The enhanced Type-3 codebook is triggered by downlink control information (DCI) format 1_1 or 1_2 and transmitted using a physical uplink control channel (PUCCH) or a physical uplink shared channel (PUSCH). Information in the DCI includes: whether to use configured, activated, or indicated carriers, cell indexes for the carriers, whether to use all HARQ processes, use only semi-persistent scheduling (SPS) processes, or use only non-SPS processes, whether to use all priority HARQ processes, use only high priority HARQ processes, or use only low priority HARQ processes, and HARQ process range.