Flexible CSI Reporting Timing for UE Capability Adaptation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current mobile communication systems face challenges in supporting high-speed data services due to resource shortages and increased user demands for higher transfer rates, larger connection device capacities, very low end-to-end latency, and high energy efficiency, necessitating advanced techniques such as small cell enhancement, dual connectivity, and flexible CSI reporting configurations.
Innovation Solution
A method for receiving and reporting channel state information (CSI) by a base station, allowing for non-uniform flexible CSI measurement and reporting, tailored to each User Equipment's (UE) capability, and considering its CSI calculation capability to calculate recent channel or interference estimation values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If uniform fixed-time gap CSI measurement is used, then measurement simplicity is maintained, but adaptability to different UE capabilities deteriorates
Solution Approach 1:
The patent applies dynamics by transitioning from a fixed uniform time gap to a flexible non-uniform time gap configuration. The time gap between CSI-RS transmission and CSI reporting is dynamically adjusted based on UE capability indicators, allowing the system to adapt measurement timing to individual device processing capabilities while maintaining overall system flexibility.
Solution Approach 2:
The patent changes the parameter of time gap duration from a fixed value to a variable parameter that can be configured differently for each UE. By modifying this temporal parameter based on UE capability information, the system achieves better adaptability without requiring complete redesign of the CSI measurement framework.
2Measurement precision
If CSI measurement is performed without considering UE calculation capability, then measurement speed is maintained, but measurement precision deteriorates
Solution Approach 1:
The patent applies preliminary action by having the base station configure and signal the appropriate time gap before the actual CSI measurement occurs. The base station determines the suitable measurement timing in advance based on UE capability information, ensuring that the UE has sufficient processing time to accurately calculate channel estimation without rushing the measurement process.
Solution Approach 2:
The patent implements feedback mechanisms where the UE provides capability information about its processing capacity, and the base station uses this feedback to adjust the time gap configuration. This closed-loop approach ensures that measurement precision is maintained by respecting the actual calculation capability of each UE device.
3Adaptability or versatility
If flexible non-uniform CSI measurement is implemented, then adaptability to UE capability is improved, but system complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the CSI measurement process into distinct controllable elements: CSI-RS transmission timing, UE processing time gap, and CSI reporting timing. This segmentation allows each component to be independently configured and optimized, making the complex flexible measurement system manageable through modular control mechanisms.
Data Source
Figure 1~2
Figure 3
Figure 4
AI summary
A method of performing, by a UE, channel state information, CSI, reporting in a wireless communication system is proposed, which comprises: reporting, to a BS, UE capability for gap information; receiving, from the BS, CSI reporting setting information which includes information for a frequency granularity for a channel quality indicator, CQI, and a precoding matrix indicator, PMI, and information for a CSI codebook type, wherein the gap information is configured by the base station based on the CSI reporting setting information and the UE capability; receiving, from the base station, at least one CS!-reference signal, CSI-RS; and performing the CSI reporting to the base station by using a measurement value for at least one specific CSI-RS among the at least one CSI-RS, wherein the at least one specific CSI-RS is received before a performing timing of the CSI reporting minus a timing indicated by the gap information.