Selective Feedback for Time-Frequency Resource Puncturing
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Solution Overview
Problem
In LTE systems, the feedback overheads are high and efficiency is low due to the need to feedback on all data after puncturing, especially when URLLC service data replaces eMBB service data, leading to inefficiencies in resource utilization and increased latency.
Innovation Solution
A method and apparatus for data transmission that allows selective feedback based on indication information, dividing time-frequency resources into first and second time-frequency resources, where feedback is sent only for correctly decoded data on the second time-frequency resource, and not for the first, reducing unnecessary feedback and improving efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If feedback is sent for all data in the codeword after puncturing, then the transmit end can know the decoding status of all data, but the feedback overheads increase and feedback efficiency decreases
Solution Approach 1:
The patent extracts only the necessary feedback information corresponding to non-punctured code blocks, removing the redundant feedback overhead for punctured resources. This allows the system to maintain reliability for actual data transmission while reducing feedback overhead by sending back only the essential acknowledgment information.
Solution Approach 2:
Instead of providing complete feedback for all code blocks (excessive action), the patent applies partial feedback only to the non-punctured code blocks that actually contain data. This reduces the quantity of feedback information while maintaining sufficient reliability for the transmitted data.
2Reliability
If feedback is sent for all data in the codeword, then complete decoding status is provided, but feedback efficiency decreases
Solution Approach 1:
The patent extracts only the relevant feedback information for non-punctured code blocks, eliminating unnecessary feedback processing for punctured resources. This extraction approach maintains complete decoding status information for actual data while improving feedback efficiency by reducing the total volume of feedback information to be processed.
Solution Approach 2:
The patent applies partial feedback action only where necessary (non-punctured blocks) rather than performing complete feedback processing for all blocks. This improves feedback efficiency by reducing the computational and transmission overhead while still providing sufficient decoding status information for reliability.
3Adaptability or versatility
If URLLC service data replaces eMBB service data through puncturing, then resource utilization for high-priority data is improved, but feedback overheads increase due to need to feedback on all data
Solution Approach 1:
The patent extracts feedback information only for non-punctured eMBB code blocks, separating the feedback requirement from the punctured URLLC resources. This maintains the adaptability of resource allocation for high-priority URLLC data while reducing feedback overhead by excluding feedback for the punctured portions from the original eMBB transmission.
Solution Approach 2:
The patent applies partial feedback only to the remaining non-punctured eMBB data, avoiding excessive feedback for the punctured resources that are now carrying URLLC data. This improves resource allocation flexibility for URLLC while reducing feedback overhead by limiting feedback to only the partially remaining eMBB content.
Data Source
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AI summary
This application relates to a data transmission method and apparatus, and the method includes: receiving, by a first device, data from a second device, where the data is carried on time-frequency resources; receiving, by the first device, indication information from the second device, where the indication information is used by the first device to divide the time-frequency resources into a first time-frequency resource and/or a second time-frequency resource; and determining, by the first device, a manner of sending, to the second device, feedback information of data carried on the first time-frequency resource and/or a manner of sending, to the second device, feedback information of data carried on the second time-frequency resource, and sending the feedback information to the second device in a determined manner of sending the feedback information. In this way, feedback overheads are reduced.