5G Downlink ACK Feedback Across Repeated Resource Units
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Solution Overview
Problem
In the New Radio (NR) system, there is an urgent need for an effective method to transmit feedback information for downlink channels, particularly in 5G systems where channels are repeatedly transmitted across multiple resource units.
Innovation Solution
A wireless communication method and device that enables feedback response for downlink channels by determining a target resource set based on higher layer parameters, configuring each resource unit to transmit downlink channels, and calculating feedback information bits based on the number of resource units, allowing for efficient feedback transmission across multiple resource units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If downlink channels are repeatedly transmitted across multiple resource units in 5G systems, then transmission reliability is improved, but feedback information transmission complexity increases
Solution Approach 1:
The patent segments feedback information into separate feedback messages corresponding to different resource units. Each feedback message contains feedback bits specifically for its associated resource unit, allowing independent processing and transmission of feedback for each downlink channel repetition, thereby managing complexity through structured division.
Solution Approach 2:
The patent introduces a new dimension by mapping feedback information to resource unit indices. The feedback message structure incorporates resource unit identification, creating a two-dimensional structure where feedback bits are organized both by resource unit index and by the specific downlink channel parameters, enabling systematic handling of repeated transmissions.
2Measurement precision
If feedback information bits are calculated based on the number of resource units, then feedback accuracy is improved, but information transmission overhead increases
Solution Approach 1:
The patent applies local quality by providing differentiated feedback for each resource unit based on its specific characteristics. Each feedback message contains feedback bits tailored to the particular resource unit's downlink channel conditions, allowing precise feedback where needed while avoiding uniform overhead across all resource units.
Solution Approach 2:
The patent changes parameters dynamically by adjusting the number of feedback bits based on the actual number of resource units and their configurations. The feedback information structure adapts to the specific transmission scenario, modifying bit allocation according to resource unit count and type, thereby optimizing the balance between accuracy and overhead.
Data Source
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AI summary
Provided in an embodiment of the present invention are a radio communication method and device capable of realizing feedback acknowledgement for a downlink channel repeatedly transmitted in a 5G system. The method comprises: a terminal transmitting feedback information at a first time unit, wherein the feedback information comprises feedback acknowledgement information corresponding to a first downlink channel transmitted by means of a target resource set, resource units in the target resource set belong to the same carrier, and repeated transmission of the first downlink channel occupies multiple resource units in the target resource set.