Uplink Control Information Transmission via PUSCH
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Solution Overview
Problem
Current wireless communication systems face inefficiencies in transmitting a large amount of uplink control information, particularly in advanced systems like LTE-A with CoMP and carrier aggregation, where the existing feedback mechanisms are inadequate for reporting increased control information via the uplink.
Innovation Solution
A method is introduced to dynamically adapt the feedback mode and structure for uplink control information transmission using the Physical Uplink Shared Channel (PUSCH), allowing for efficient allocation of feedback resources and reduced signaling overhead by designating feedback modes through upper layer signaling and physical channel signaling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If existing feedback mechanisms are used for uplink control information transmission, then system compatibility is maintained, but transmission efficiency and feedback accuracy deteriorate when large amounts of control information need to be reported
Solution Approach 1:
The patent implements dynamic adaptation of feedback mode and structure based on channel conditions and traffic requirements. The system can switch between different feedback modes (e.g., periodic, aperiodic, semi-persistent) and adjust feedback parameters dynamically, allowing optimal transmission efficiency and feedback accuracy under varying conditions rather than using fixed mechanisms
Solution Approach 2:
The patent changes key parameters of the feedback mechanism including feedback period, payload size, modulation scheme, and resource allocation based on channel quality and traffic patterns. By adapting these parameters dynamically, the system achieves both high transmission efficiency and accurate feedback delivery, resolving the contradiction between the two requirements
2Measurement precision
If feedback resources are allocated for detailed control information reporting, then feedback accuracy improves, but signaling overhead increases
Solution Approach 1:
The patent applies partial feedback reporting by selectively transmitting only the most critical control information elements based on channel conditions and service requirements. Instead of always reporting complete feedback, the system transmits partial feedback when sufficient, reducing overhead while maintaining adequate accuracy, and only increases reporting detail when necessary
Solution Approach 2:
The patent segments control information into different priority levels and categories (e.g., channel state information, precoding matrix indicator, rank indicator). This segmentation allows the system to report only high-priority segments when overhead is constrained, while providing comprehensive feedback when resources are abundant, thus balancing accuracy and overhead
3Device complexity
If feedback mode is fixed for simplicity, then system complexity is reduced, but adaptability to different communication environments deteriorates
Solution Approach 1:
The patent implements dynamic feedback mode selection where the system can switch between periodic, aperiodic, and semi-persistent feedback modes based on real-time channel conditions, traffic patterns, and service requirements. This dynamic approach maintains manageable complexity through standardized mode definitions while achieving high adaptability to varying communication environments
Solution Approach 2:
The patent designs a universal feedback framework that can handle multiple feedback scenarios and service types through a common structure with configurable parameters. This multi-functional design allows the same basic mechanism to serve different purposes (e.g., HARQ ACK/NACK, channel quality feedback, precoding feedback) without requiring separate dedicated mechanisms for each, thus controlling complexity while enhancing adaptability
Data Source
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AI summary
A wireless communication system is disclosed. A method and apparatus for allowing a user equipment (UE) to transmit uplink control information through a physical uplink shared channel (PUSCH) are disclosed. A method for allowing a UE to transmit uplink control information through a PUSCH in a wireless communication system includes receiving configuration information about a plurality of PUSCH feedback modes, identifying information indicating a specific PUSCH feedback mode for the PUSCH by using uplink allocation information for the PUSCH, and transmitting the uplink control information through the PUSCH in accordance with the specific PUSCH feedback mode.