HARQ-ACK Codebook Mapping for Multi-SPS Resource Release
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Solution Overview
Problem
The increasing number of UEs and data volume in wireless communication systems necessitates a method to efficiently utilize limited radio resources for transmitting and receiving uplink/downlink data and control information, particularly in high-density node and UE environments, while addressing varying service requirements and reducing latency.
Innovation Solution
A method and apparatus for transmitting and receiving a hybrid automatic repeat request acknowledgement (HARQ-ACK) codebook, including HARQ-ACK information for the release of semi-persistent scheduling (SPS) resources, with the HARQ-ACK bit location corresponding to the SPS resource having the lowest configuration index, to optimize resource utilization and reduce latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the number of UEs and data volume increases to support various services, then service capability and data throughput are improved, but radio resource availability and system complexity worsen
Solution Approach 1:
The patent segments the HARQ-ACK codebook into multiple parts, with each part corresponding to a specific SPS configuration index. This allows the UE to report HARQ-ACK information for multiple SPS configurations in an organized manner, managing complexity through structured division while supporting increased data throughput across multiple services
2Reliability
If HARQ-ACK information for multiple SPS resources is transmitted, then resource release reliability is improved, but control information overhead increases
Solution Approach 1:
The patent merges HARQ-ACK information for multiple SPS resources into a single HARQ-ACK codebook structure. By combining acknowledgments for multiple semi-persistent scheduling configurations into one unified report, the system reduces the number of separate control messages needed, thereby reducing overall control information overhead while maintaining reliable resource release confirmation
Solution Approach 2:
The HARQ-ACK codebook is designed with multi-functionality to handle different types of SPS resource releases within a single structure. The codebook can accommodate HARQ-ACK information for multiple SPS configurations and different SPS types, making it a universal solution that reduces overhead across various service requirements
3Productivity
If HARQ-ACK bit location is optimized to correspond to lowest SPS configuration index, then processing efficiency is improved, but codebook structure complexity increases
Solution Approach 1:
The patent establishes a predetermined rule that the HARQ-ACK bit location corresponds to the lowest SPS configuration index. This preliminary positioning rule allows the base station to anticipate and correctly interpret the HARQ-ACK information without requiring complex real-time analysis, thereby improving processing efficiency while the structured bit placement manages codebook complexity
Data Source
AI summary
A user equipment receives downlink control information (DCI) for releasing a plurality of semi-persistent scheduling (SPS) resources, and transmits a HARQ-ACK codebook including HARQ-ACK information for releasing the plurality of SPS resources. The HARQ-ACK codebook includes the HARQ-ACK information for releasing the plurality of SPS resources at the position of a HARQ-ACK bit corresponding to an SPS resource having the lowest SPS setting index among the plurality of SPS resources.