Feedback Information Transmission for Coordinated Multipoint Multi-Stream
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Solution Overview
Problem
Current coordinated multipoint multi-stream transmission technologies face challenges in efficiently and reliably performing acknowledgment feedback for data reception, particularly in scenarios where multiple transmission points transmit data using the same carrier, as existing methods struggle to support ACK/NACK feedback for multiple PDCCHs.
Innovation Solution
A feedback information transmission method and apparatus that enable a terminal device to send feedback information using one or more time-frequency resources to multiple transmission points, allowing them to learn the receiving status of transmitted data, thereby improving information transmission efficiency and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple transmission points transmit data using the same carrier in coordinated multipoint multi-stream transmission, then data transmission capacity is improved, but acknowledgment feedback reliability deteriorates due to inability to support ACK/NACK feedback for multiple PDCCHs
Solution Approach 1:
The patent segments the acknowledgment feedback process by introducing separate feedback channels (PUCCH and PUSCH) with distinct functions. PUCCH is used for feedback when only PDCCH is received, while PUSCH is used for feedback when both PDCCH and PDSCH are received. This segmentation allows reliable acknowledgment feedback to be maintained across multiple transmission points by providing dedicated feedback paths for different reception scenarios.
2Productivity
If terminal device sends feedback information using shared resources, then resource utilization is improved, but feedback information reliability deteriorates due to potential resource conflicts
Solution Approach 1:
The patent implements dynamic resource allocation where the terminal device adaptively selects between PUCCH and PUSCH based on the received downlink signals. When only PDCCH is received, feedback is sent via PUCCH; when both PDCCH and PDSCH are received, feedback is sent via PUSCH. This dynamic selection mechanism ensures feedback reliability while efficiently utilizing available uplink resources without conflicts.
Data Source
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AI summary
This application provides a feedback information transmission method and an apparatus. The method includes: receiving, by a terminal device, M data blocks corresponding to control information of N downlink control channels, where the M data blocks are carried on a same carrier, N is a positive integer greater than or equal to 2, and M is a positive integer greater than or equal to 2; determining, by the terminal device, a target resource; and sending, by the terminal device, feedback information for the M data blocks on the target resource. By implementing the foregoing technical solutions, feedback information for a plurality of pieces of data can be sent to the plurality of transmission points by using one or more time-frequency resources, so that the plurality of transmission points can learn of a receiving status of the transmitted data, and acknowledgment feedback can be performed for data reception in a coordinated multipoint multi-stream transmission technology.