HARQ-ACK Codebook Mapping for Multi-SPS Resource Release
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Solution Overview
Problem
The increasing number of communication devices and data throughput demands in wireless communication systems necessitate efficient methods for using limited radio resources to transmit/receive uplink/downlink data and control information, particularly in high-density node and UE environments, while addressing varying service requirements and latency challenges.
Innovation Solution
A method and apparatus for transmitting/receiving a hybrid automatic repeat request acknowledgement (HARQ-ACK) codebook, including HARQ-ACK information for semi-persistent scheduling (SPS) resource release, with specific bit locations corresponding to the lowest SPS configuration index, to optimize communication efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the number of UEs and data throughput demands increase, then communication capacity requirements improve, but radio resource availability deteriorates
Solution Approach 1:
The patent segments the HARQ-ACK codebook into multiple parts or groups, allowing efficient transmission of acknowledgment information for multiple SPS resources. This segmentation enables the system to handle increased communication capacity requirements by organizing and transmitting ACK/NACK information in a structured, resource-efficient manner without requiring proportional increases in radio resources.
2Adaptability or versatility
If multiple SPS resources are released, then resource management flexibility improves, but control information transmission complexity deteriorates
Solution Approach 1:
The patent merges multiple HARQ-ACK information elements into a single codebook structure. When multiple SPS resources are released, their acknowledgment information is combined into one unified transmission, reducing the number of separate control messages needed and simplifying the overall control information transmission while maintaining flexible resource management capabilities.
Solution Approach 2:
The HARQ-ACK codebook is designed as a universal structure that can accommodate acknowledgments for multiple different SPS resources simultaneously. This multi-functional codebook can handle releases of one or multiple SPS resources using the same transmission mechanism, reducing complexity by providing a single solution for various resource management scenarios.
3Reliability
If HARQ-ACK information for multiple SPS resources is transmitted separately, then information accuracy improves, but transmission overhead and latency deteriorate
Solution Approach 1:
The patent prepares and structures the HARQ-ACK codebook in advance to include acknowledgment information for multiple potential SPS resources. This preliminary organization allows the system to efficiently transmit multiple acknowledgments in a single operation when needed, reducing latency while maintaining information accuracy through pre-configured codebook structures that preserve the integrity of each individual ACK/NACK element.
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.