Semi-Persistent CSI Reporting in 5G NR Sub-Transmission Scheduling
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Solution Overview
Problem
The existing 5G communication systems face challenges in efficiently managing channel state reporting resources and battery consumption in New Radio (NR) systems, particularly in supporting semi-persistent CSI reporting and transmitting multiple data pieces within one transmission interval.
Innovation Solution
The proposed solution involves configuring sub-transmission intervals within a transmission interval, where data is transmitted based on downlink control information, and utilizing a transceiver and controller to manage these intervals, allowing for semi-persistent CSI reporting and efficient transmission of multiple data pieces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If semi-persistent CSI reporting is implemented in 5G NR systems, then channel state reporting efficiency is improved, but resource overhead and battery consumption increase
Solution Approach 1:
The patent implements dynamic activation and deactivation of semi-persistent CSI reporting through DCI signaling. The base station can flexibly activate or deactivate CSI reporting based on current channel conditions and traffic requirements, allowing the system to adapt between periodic reporting (when channel varies rapidly) and on-demand reporting (when channel is stable), thus improving reporting efficiency while controlling resource overhead
Solution Approach 2:
The patent establishes periodic CSI reporting intervals when semi-persistent reporting is activated. Instead of continuous reporting, the UE transmits CSI at configured periodic intervals (e.g., every 2ms, 4ms, 8ms), which maintains channel state awareness while significantly reducing resource overhead compared to continuous reporting. The period can be dynamically adjusted based on channel variability
2Productivity
If multiple data pieces are transmitted within one transmission interval, then data transmission capacity is improved, but control information complexity increases
Solution Approach 1:
The patent divides a transmission interval into multiple sub-intervals or slots, each capable of carrying independent data pieces. Within each slot, separate DCI messages can trigger CSI reporting for different data transmissions. This segmentation allows the system to handle multiple data pieces with standardized control procedures, avoiding the need for complex multi-data control mechanisms
Solution Approach 2:
The patent designs the DCI format to serve multiple functions: it can trigger aperiodic CSI reporting, activate/deactivate semi-persistent reporting, and schedule data transmissions. This multi-functional control structure reduces overall control information complexity by using a unified signaling mechanism rather than separate specialized controls for each function
3Adaptability or versatility
If semi-persistent CSI reporting is activated dynamically, then resource flexibility is improved, but signaling overhead increases
Solution Approach 1:
The patent combines the activation/deactivation of semi-persistent CSI reporting with existing DCI formats used for data scheduling. Instead of introducing separate dedicated signaling for CSI control, the patent merges CSI reporting control bits into the existing DCI structure, thereby achieving dynamic resource flexibility while minimizing additional signaling overhead
Solution Approach 2:
The patent uses parameter fields within DCI to dynamically change CSI reporting behavior. By modifying parameters such as reporting period, resource offset, and activation state through DCI parameters, the system achieves flexible resource adaptation without requiring extensive new signaling. The same DCI structure can support multiple parameter configurations
Data Source
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AI summary
The present disclosure relates to a communication technique for convergence of a 5G communication system for supporting a higher data transmission rate beyond a 4G system with an IoT technology, and a system therefor. The present disclosure may be applied to an intelligent service (for example, smart home, smart building, smart city, smart car or connected car, health care, digital education, retail business, security and safety-related service, etc.) on the basis of a 5G communication technology and an IoT-related technology. The present invention provides a method and device for supporting semi-persistent channel state reporting (semi-persistent CSI reporting) in addition to existing aperiodic and periodic channel state reporting in order to minimize and efficiently use a resource necessary for channel state reporting by a base station and a terminal in a new radio (NR) system. Further, the present invention provides a method and device for providing support for transmission of multiple pieces of data for different terminals, or two or more pieces of data for an identical terminal in a single transmission interval.