HARQ Feedback DCI Indication for Throughput
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Solution Overview
Problem
The existing hybrid automatic repeat request (HARQ) technology in communication systems experiences low throughput due to the stop-and-wait protocol, which requires the transmit end to wait for acknowledgement information after each transmission, limiting data transmission efficiency, especially when multiple parallel HARQ processes are used.
Innovation Solution
The proposed solution involves using downlink control information (DCI) to indicate the HARQ process identity, allowing terminal devices to efficiently process data based on HARQ feedback information, thereby improving data transmission efficiency and reducing signaling overheads by reusing existing fields in the DCI to indicate scheduling-free HARQ processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple parallel HARQ processes are used to improve throughput, then data transmission efficiency is improved, but the complexity of identifying and processing feedback information increases
Solution Approach 1:
The patent extracts the HARQ process identity indication from the feedback information itself and places it in the DCI format. By embedding the HARQ PID in the DCI that carries the feedback, the terminal device can directly identify which HARQ process the feedback corresponds to without complex processing of multiple parallel processes, thus resolving the contradiction between improved throughput and reduced processing complexity
Solution Approach 2:
The DCI serves as an intermediary that carries both the feedback information and the HARQ process identity indication. This intermediary structure allows the terminal device to efficiently match feedback to the correct HARQ process, simplifying the processing of multiple parallel HARQ processes while maintaining high throughput
2Reliability
If the transmit end waits for acknowledgement information after each transmission, then reliability is improved, but transmission speed deteriorates
Solution Approach 1:
The patent segments the acknowledgment process by embedding the HARQ process identity in the DCI, allowing the terminal device to quickly identify and process feedback for specific HARQ processes. This segmentation enables parallel processing of multiple HARQ processes, maintaining reliability through proper acknowledgment while improving overall transmission speed through efficient process management
Solution Approach 2:
By enabling the transmit end to efficiently identify and process feedback for multiple parallel HARQ processes through the DCI indication mechanism, the system maintains continuous data transmission across multiple processes. The useful action of data transmission continues without interruption while reliability is maintained through proper acknowledgment handling
Data Source
AI summary
A communication method, a communications apparatus and a non-transitory computer-readable medium are provided. A network device receives data carried on a first scheduling-free resource via a first hybrid automatic repeat request (HARQ) process from a terminal device, and decodes the data to generate HARQ feedback information. The network device sends downlink control information (DCI) to the terminal device, where the DCI includes the HARQ feedback information and first indication information. The first indication information indicates the first HARQ process.