HARQ-ACK Codebook Feedback Mode Switching for 5G Resource Efficiency
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Solution Overview
Problem
Current communication systems face challenges in efficiently transmitting HARQ-ACK feedback information for downlink data, particularly in meeting varying reliability and delay requirements without resource waste, especially when using semi-static or dynamic feedback modes in 5G networks.
Innovation Solution
A method where a terminal device receives downlink control information (DCI) from a network device to determine the feedback parameter of a HARQ-ACK codebook, which includes selecting the feedback mode and resource for transmitting the HARQ-ACK codebook, allowing for semi-static or dynamic feedback modes based on data amount and traffic type, thereby optimizing resource usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If semi-static feedback mode is used to determine HARQ-ACK codebook size and correspondence, then device complexity is reduced and ease of operation is improved, but resource utilization efficiency deteriorates due to inability to adapt to varying traffic volumes
Solution Approach 1:
The patent applies dynamics by enabling the HARQ-ACK codebook to switch between semi-static and dynamic feedback modes based on traffic conditions. The codebook size and correspondence relationships are no longer fixed but can be dynamically adjusted according to actual downlink data traffic volume, thereby resolving the contradiction between operational simplicity and resource utilization efficiency.
2Productivity
If dynamic feedback mode is used to determine HARQ-ACK codebook size and correspondence, then resource utilization efficiency is improved through adaptation to traffic volume, but device complexity increases and ease of operation deteriorates
Solution Approach 1:
The patent applies parameter changes by modifying the feedback mode parameter of the HARQ-ACK codebook based on traffic conditions. When downlink data traffic volume exceeds a threshold, the system switches from semi-static to dynamic feedback mode, adjusting codebook size and correspondence parameters dynamically. This resolves the contradiction by allowing resource efficiency improvements without permanently increasing device complexity.
3Ease of operation
If fixed feedback resource is allocated for HARQ-ACK codebook transmission, then ease of operation is improved, but resource waste occurs when traffic volume is low
Solution Approach 1:
The patent applies dynamics by making the feedback resource allocation adaptive rather than fixed. The system dynamically selects feedback resources based on actual traffic volume, switching between semi-static and dynamic feedback modes to match resource allocation with actual needs, thereby eliminating resource waste while maintaining ease of operation.
4Reliability
If HARQ-ACK codebook size is increased to meet reliability requirements of different traffic types, then reliability is improved, but resource consumption increases
Solution Approach 1:
The patent applies parameter changes by adjusting the HARQ-ACK codebook size and feedback mode parameters according to traffic type requirements. For high-reliability traffic, the system increases codebook size and uses dynamic feedback mode, while for normal traffic, it uses semi-static mode with smaller codebook size, thereby achieving reliability improvement without excessive resource consumption.
Data Source
AI summary
A method for feedback information transmission, a terminal device, and network device are provided. The method includes the following. A terminal device receives downlink control information (DCI) transmitted by a network device for scheduling target data. The terminal device receives the target data transmitted by the network device. The terminal device determines a feedback parameter of a hybrid automatic repeat request-acknowledgement (HARQ-ACK) codebook according to the DCI. The HARQ-ACK codebook includes HARQ-ACK information of the target data, the feedback parameter includes a feedback mode of the HARQ-ACK codebook and/or a feedback resource for transmitting the HARQ-ACK codebook, and the feedback mode of the HARQ-ACK codebook includes a semi-static feedback mode or a dynamic feedback mode. The terminal device transmits the HARQ-ACK codebook to the network device according to the feedback parameter.