HARQ Process Selection Rules for NRU Configured Grant Transmission
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Solution Overview
Problem
The challenge in New Radio Unlicensed (NRU) Configured Grant (CG) enhancement schemes is the flexible selection of HARQ processes, as they are not calculated using formulas but are selected by the terminal device, leading to uncertainty in data transmission.
Innovation Solution
A method for a terminal device to select a HARQ process from multiple available processes based on a predefined or dynamically configured HARQ process selection rule, and a network device to send indication information for HARQ process selection, along with managing timers like CG and retransmission timers based on specific conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the terminal device selects HARQ process autonomously without formula calculation, then flexibility in resource selection is improved, but uncertainty in data transmission increases
Solution Approach 1:
The patent changes the parameter selection approach from autonomous terminal device selection to network device-controlled selection via indication information. The network device dynamically indicates which HARQ process should be used, transforming the system from flexible but uncertain terminal autonomy to controlled reliability through network guidance.
Solution Approach 2:
The network device provides feedback through indication information to the terminal device, guiding the terminal's HARQ process selection. This feedback mechanism ensures that the terminal's autonomous selection aligns with network requirements, reducing transmission uncertainty while preserving flexibility.
2Productivity
If multiple HARQ processes are configured for CG resource, then data transmission capacity is improved, but complexity in HARQ process selection increases
Solution Approach 1:
The patent extracts the HARQ process selection decision from the terminal device and places it with the network device. By taking out the selection complexity from the terminal and centralizing it in the network controller, multiple HARQ processes can be configured for increased capacity without burdening the terminal with selection complexity.
3Reliability
If CG timer and CG retransmission timer are managed based on multiple conditions, then data transmission reliability is improved, but signaling overhead and processing complexity increase
Solution Approach 1:
The patent implements dynamic timer management where the CG timer and CG retransmission timer are conditionally started or restarted based on multiple factors including priority levels, resource conflicts, and transmission status. This dynamic approach adapts timer behavior to current system conditions, improving reliability by ensuring appropriate retransmission timing while managing complexity through structured condition evaluation.
Data Source
AI summary
Provided in embodiments of the present disclosure are a wireless communication method, a terminal device, and a network device. Said method comprises: a terminal device selects, according to a HARQ process selection rule, a first HARQ process among a plurality of HARQ processes corresponding to a CG resource, and transmits data on the first HARQ process by means of the CG resource. A HARQ process can thereby be selected when there are a plurality of usable HARQ processes corresponding to a CG resource.