Dynamic CSI Feedback Timing Configuration in Wireless Systems
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Solution Overview
Problem
Current mobile communication systems face challenges in accommodating explosive data traffic, high transfer rates, increased device connections, low latency, and energy efficiency, particularly in setting optimal CSI feedback timings for accurate channel state information reporting.
Innovation Solution
A method for dynamically setting CSI feedback timings based on information such as the number of antenna ports, CSI codebook type, and bandwidth granularity, allowing for flexible CSI reporting in wireless communication systems by defining these parameters within RRC signaling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If CSI feedback timing is set to be frequent to improve channel state information accuracy, then measurement precision is improved, but use of energy increases and latency increases
Solution Approach 1:
The patent implements dynamic CSI feedback timing adjustment by allowing the network to configure different feedback periods and timing offsets based on channel conditions, traffic patterns, and QoS requirements. This enables the system to adaptively balance between measurement precision and energy consumption rather than using fixed frequent feedback
Solution Approach 2:
The patent changes the timing parameters (feedback period, timing offset) of CSI reporting based on varying system conditions. By adjusting these parameters dynamically, the system optimizes the balance between obtaining accurate channel state information and reducing energy consumption from frequent feedback transmissions
2Measurement precision
If CSI feedback timing is set to be frequent to improve channel state information accuracy, then measurement precision is improved, but latency increases
Solution Approach 1:
The patent implements dynamic timing adjustment where the network can configure appropriate feedback periods and timing offsets based on real-time requirements. This allows the system to reduce latency when fast response is needed while maintaining accuracy when channel conditions warrant more frequent feedback
Solution Approach 2:
The patent adjusts timing parameters (feedback period, timing offset) dynamically to optimize the balance between measurement precision and latency. By changing these parameters based on system conditions, the system avoids the constant latency penalty of frequent feedback while maintaining necessary accuracy
3Adaptability or versatility
If different CSI feedback timings are set for different configurations (antenna ports, codebook types, bandwidth granularity), then adaptability is improved, but device complexity increases
Solution Approach 1:
The patent creates a universal configuration mechanism where a single set of parameters (feedback period, timing offset) can be applied across different CSI reporting configurations. This multi-functional approach allows the system to handle diverse scenarios (different antenna ports, codebook types, bandwidth granularities) without requiring separate complex configuration sets for each
Solution Approach 2:
The patent uses parameter changes to achieve adaptability across different configurations. By modifying the timing parameters based on configuration type rather than creating entirely separate configuration sets, the system maintains flexibility while reducing overall complexity through parameter-based differentiation
Data Source
AI summary
This specification provides a method for transmitting, by a user equipment (UE), a CSI (Channel State Information) report in a wireless communication system. More specifically, the method includes: receiving, from a base station, downlink control information (DCI) including information for triggering the CSI report; computing CSI based on the number of symbols related to a time for computing the CSI; and transmitting the CSI report to the base station, in which the number of symbols related to the time for computing the CSI is defined based on information for the number of antenna ports, information for a CSI-RS resource, information for a bandwidth granularity, and information for a CSI codebook type.