SP-CSI Report Control Using DCI for NR Uplink Feedback
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Solution Overview
Problem
In future radio communication systems like NR, the proper control of multiple semi-persistent CSI (SP-CSI) reports is lacking, leading to potential deterioration of communication throughput and quality.
Innovation Solution
Utilizing downlink control information (DCI) to activate and deactivate multiple SP-CSI configurations flexibly, ensuring proper control of SP-CSI reports through higher layer signaling and DCI, and controlling the timing of DCI and SP-CSI report transmission to reduce signaling overhead and load.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple SP-CSI reports are activated to improve channel state information acquisition, then communication quality is improved, but signaling overhead increases
Solution Approach 1:
The patent combines multiple SP-CSI report configurations into a single DCI message for activation/deactivation. Instead of sending separate DCI messages for each SP-CSI report, the base station merges the control information for multiple reports into one unified DCI, thereby reducing signaling overhead while maintaining the ability to control multiple channel state information reports simultaneously.
Solution Approach 2:
The DCI message is designed to serve multiple functions by enabling the activation and deactivation of multiple SP-CSI reports simultaneously. This multi-functional approach allows a single DCI transmission to control several channel state information reporting configurations, improving signaling efficiency while maintaining comprehensive control over multiple SP-CSI reports.
2Measurement precision
If multiple SP-CSI reports are configured to improve channel state information acquisition, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent merges the control mechanisms for multiple SP-CSI reports into a unified DCI-based activation/deactivation procedure. This consolidation simplifies the control architecture by eliminating the need for separate control messages for each SP-CSI report, thereby reducing device complexity while preserving the capability to manage multiple channel state information reports with different measurement configurations.
3Productivity
If multiple SP-CSI reports are activated to improve communication throughput, then productivity is improved, but ease of operation deteriorates
Solution Approach 1:
The DCI message is designed with multi-functionality to handle the activation and deactivation of multiple SP-CSI reports simultaneously. This universal control mechanism maintains operational simplicity by allowing the base station to control multiple channel state information reports through a single unified command, preserving ease of operation while enabling improved communication throughput through multiple concurrent SP-CSI reports.
Data Source
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AI summary
To properly control a plurality of SP-CSI reports even in a case where activation of the SP-CSI reports is supported, a user terminal according to one aspect of the present disclosure includes a receiving section that receives downlink control information indicating a report of semi-persistent channel state information (SP-CSI) utilizing an uplink shared channel, and a control section that controls, based on the downlink control information, at least one of activation or deactivation of reports of a plurality of SP-CSI configurations different from each other in conditions.