Uplink Resource Determination for HARQ Feedback in NR Systems
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Solution Overview
Problem
In New Radio (NR) mobile communication systems, there is a need for an efficient method to determine uplink resources for reporting Hybrid Automatic Repeat Request (HARQ) feedback information, ensuring that user equipment can accurately convey transmission success or failure information to control nodes, as existing methods lack clarity on resource allocation and reporting consistency.
Innovation Solution
A method and device for determining a target uplink channel based on resources such as a resource pool, subchannel, Bandwidth Part (BWP), or carrier, allowing for accurate allocation and reporting of HARQ feedback information, including the use of Physical Uplink Control Channel (PUCCH) or Physical Uplink Shared Channel (PUSCH), with associations through identifiers and signaling for consistent communication with control nodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If a SL receiving user feeds back HARQ information directly to the control node, then the control node can directly know transmission success, but the user cannot determine whether retransmission is needed
Solution Approach 1:
The patent introduces the SL sending user as an intermediary in the feedback mechanism. The SL receiving user feeds back HARQ information to the SL sending user, who then relays this information to the control node. This intermediary approach allows the receiving user to obtain retransmission status information while maintaining a manageable feedback mechanism structure.
Solution Approach 2:
The patent implements a multi-stage feedback mechanism where HARQ feedback information flows from the SL receiving user to the SL sending user, and subsequently from the SL sending user to the control node. This feedback loop enables all parties to obtain necessary transmission status information for appropriate decision-making.
2Productivity
If multiple users share the same uplink resource for HARQ feedback, then resource utilization improves, but resource allocation clarity deteriorates
Solution Approach 1:
The patent segments the uplink resource allocation by associating different HARQ feedback information with different uplink resources based on the sidelink resource used for data transmission. This segmentation allows multiple users to share uplink resources while maintaining clear allocation boundaries through the association relationship, thus improving resource utilization without sacrificing allocation clarity.
3Stability of the object's composition
If the user determines uplink resource based on SL resource, then resource consistency improves, but the complexity of resource mapping increases
Solution Approach 1:
The patent establishes pre-configured association relationships between sidelink resources and uplink resources before actual data transmission occurs. This preliminary action allows users to determine uplink resources based on their selected sidelink resources without complex real-time mapping calculations, thus maintaining resource consistency while reducing mapping complexity.
Data Source
AI summary
A method for determining an uplink resource and a communications device are provided. The method includes determining a target uplink channel based on at least one target resource. The target resource includes a resource pool, a subchannel, a Bandwidth Part (BWP), or a carrier.