Semi-Static HARQ-ACK Codebook Scheduling for Faster NR Decoding
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Solution Overview
Problem
Existing wireless communication systems face inefficiencies in signal transmission and reception, particularly in 3GPP-based systems, due to limited resource allocation for physical downlink control channels (PDCCH) leading to high energy consumption and long decoding times, which are exacerbated by the need for more advanced 5G technologies requiring lower latency and higher data rates.
Innovation Solution
A method and apparatus for transmitting a semi-static HARQ-ACK codebook in a wireless communication system, utilizing a user equipment and base station that determine PDSCH candidates based on TDRA tables and K1-set adjustments, allowing efficient allocation of HARQ-ACK occasions and reducing decoding time through optimized resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If resources are allocated for PDCCH transmission to multiple user equipments, then more control information can be transmitted, but the decoding time and energy consumption increase
Solution Approach 1:
The patent segments the HARQ-ACK codebook into multiple parts or groups, allowing the UE to decode and process HARQ-ACK information in smaller units rather than a single large block. This segmentation reduces the overall decoding time while maintaining the ability to transmit control information to multiple user equipments efficiently.
Solution Approach 2:
The patent employs semi-static determination of HARQ-ACK codebook parameters in advance, before actual data transmission. By pre-configuring codebook size, structure, and resource allocation, the system reduces real-time decoding complexity and time, while still accommodating multiple user equipments through the pre-planned resource distribution.
2Productivity
If resources are allocated for PDCCH transmission to multiple user equipments, then more control information can be transmitted, but energy consumption increases
Solution Approach 1:
The patent applies partial action by determining HARQ-ACK codebook parameters semi-statically rather than dynamically for every transmission. This approach uses minimal energy for reconfiguration while still adapting to varying traffic conditions, reducing overall energy consumption compared to full dynamic allocation while maintaining productivity.
Solution Approach 2:
The patent changes key parameters of the HARQ-ACK codebook (such as codebook size, resource allocation patterns, and timing parameters) from static to semi-static configurations. This allows the system to adapt parameters based on traffic conditions without the energy overhead of complete dynamic reconfiguration, balancing productivity and energy efficiency.
3Adaptability or versatility
If HARQ-ACK codebook parameters are determined dynamically, then adaptability to traffic conditions improves, but processing complexity and time increase
Solution Approach 1:
The patent implements a semi-dynamic approach where HARQ-ACK codebook parameters are configured with moderate flexibility. The system allows dynamic adjustment of certain parameters (like codebook size and resource allocation) while keeping other parameters relatively fixed, achieving a balance between adaptability to traffic conditions and processing complexity.
Solution Approach 2:
By performing preliminary configuration of HARQ-ACK codebook parameters through semi-static determination, the system reduces real-time processing complexity. The pre-configured parameters are adapted to typical traffic patterns, providing sufficient adaptability without requiring complex real-time calculations for every transmission scenario.
Data Source
AI summary
The present invention relates to a wireless communication system and, more particularly, to a method comprising the steps of: receiving a PDCCH for multi-slot scheduling; determining a PDSCH candidate for each slot on the basis of information in the PDCCH; and transmitting a semi-static HARQ-ACK codebook on the basis of the determined PDSCH candidate of each slot, and to an apparatus therefor.