Periodic CSI Feedback Signaling for Wireless System Overhead Reduction
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Solution Overview
Problem
The challenge in existing wireless communications systems, particularly in LTE and 5G networks, is to efficiently feed back channel state information (CSI) while minimizing system overheads.
Innovation Solution
A method and apparatus for periodically feeding back CSI within a specified feedback time period, using time configuration signaling and feedback configuration signaling to control the user equipment (UE) to obtain and send CSI in one or more feedback cycles, thereby improving feedback efficiency and reducing system overheads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If periodic CSI feedback is implemented in LTE and 5G networks, then channel state information can be continuously monitored and reported, but system overheads increase due to frequent feedback transmissions
Solution Approach 1:
The patent implements periodic CSI feedback where the UE automatically reports channel state information at predetermined intervals configured by the network. This periodic action ensures continuous monitoring capability (improving reliability) while controlling feedback frequency to manage system overheads. The network can configure different periodicities based on channel conditions and service requirements.
Solution Approach 2:
The patent dynamically adjusts feedback parameters including periodicity, timing offsets, and resource allocation based on channel conditions, UE capability, and network load. By changing these parameters adaptively, the system optimizes the balance between monitoring reliability and overhead reduction, implementing feedback only when necessary rather than continuously.
2Ease of operation
If manual configuration of CSI feedback is used, then feedback can be controlled precisely, but system complexity increases due to manual intervention requirements
Solution Approach 1:
The patent enables the UE to automatically perform CSI measurement, processing, and feedback transmission without manual intervention. The network configures feedback parameters once, and the UE autonomously manages the periodic feedback process including resource selection and report generation. This self-service mechanism reduces system complexity while maintaining precise control through initial configuration.
Solution Approach 2:
The patent implements automatic feedback loops where the UE continuously monitors channel conditions and autonomously adjusts feedback reporting based on pre-configured criteria. The network receives automated feedback reports and can reconfigure parameters based on observed channel patterns, creating a self-optimizing system that reduces manual intervention while maintaining control precision.
Data Source
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AI summary
Implementations of this application propose a method for feeding back channel state information. The method is applied to a wireless communications system, and includes: receiving, by user equipment, time configuration signaling and feedback configuration signaling, where the time configuration signaling is used to set a feedback time period, the feedback configuration signaling is used to configure one or more feedback cycles; and periodically obtaining and sending, by the user equipment, channel state information in one or more feedback cycles during the feedback time period. According to the foregoing manner, periodic CSI feedback is provided in the feedback time period, and system overheads are reduced through automatic feedback of the UE.