PUCCH Feedback Transmission via Time Unit Segmentation
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Solution Overview
Problem
In the New Radio (NR) system, the efficient transmission of feedback information for downlink channels is hindered by repeated transmissions, which affect the efficiency of the physical uplink control channel (PUCCH).
Innovation Solution
The method involves sending feedback information across multiple time units, where placeholder information is used for resource units, allowing feedback response information to be carried in multiple time units, thereby avoiding repeated transmissions and improving PUCCH efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If feedback information is transmitted using traditional methods in NR system, then feedback response information can be sent, but repeated transmission occurs which reduces PUCCH efficiency
Solution Approach 1:
The patent segments the feedback information transmission across multiple time units (first time unit and second time unit) with different resource sets. The first feedback information is sent on the first time unit using first resource units, while the second feedback information is sent on the second time unit using second resource units. This segmentation allows the system to avoid repeated transmissions by distributing feedback across different time resources, thereby improving PUCCH efficiency and reducing time loss.
2Productivity
If placeholder information is used for resource units in feedback information, then repeated transmission is avoided, but feedback information structure becomes more complex
Solution Approach 1:
The patent implements a universal feedback information structure that can accommodate multiple resource units across different time units. The feedback information is designed to include placeholder information for resource units that are not currently used, allowing the same feedback structure to serve multiple purposes: indicating both active resource units and reserved/unused ones. This multi-functionality simplifies the overall structure by using a single feedback message format that handles various scenarios without requiring separate complex structures for different cases.
Data Source
AI summary
A wireless communication method includes: receiving, by a terminal device, downlink channel transmitted in time slots; and sending, by the terminal device, Non-Acknowledge (NACK) corresponding to the downlink channel in a first slot; wherein a second slot is indicated to transmit feedback information corresponding to the downlink channel, and the second slot is different from the first slot.