CSI Reporting with Delay Offset Compensation for Multi-TRP Calibration

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Solution Overview

Problem

Existing wireless communication systems face challenges in efficiently managing channel state information (CSI) reporting, particularly in 5G/NR systems operating in higher frequency bands, due to hardware constraints and the need for improved calibration methods to enhance radio interface efficiency and coverage.

Innovation Solution

The implementation of a UE and base station configuration that links first and second CSI reports via a higher-layer parameter, using NTRP>1 CSI-RS resource sets and a 'typeII-CJT-r18' codebook type, to compensate for delay offset values, allowing for simultaneous reporting of CSI and DO values.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multiple CSI reports are configured with different codebook types and TRP configurations, then the system can support diverse transmission scenarios, but the device complexity and configuration management increase

Engineering Contradiction:

Improvesupport for diverse transmission scenariosVSAvoidconfiguration management

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The CSI reporting is segmented into two distinct report types: first CSI reports for delay offset measurement using non-codebook based transmission, and second CSI reports for channel state information using codebook based transmission. This segmentation allows each report type to be optimized independently, managing complexity while maintaining versatility

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Instead of having a single CSI report that tries to handle both delay offset and channel state information, the patent inverts the approach by creating two separate reporting mechanisms where the first report specifically measures delay offset and the second report provides CSI, with the second report compensating for the delay offset measured in the first

Inventive Principle:

Principle #13The other way round (Inversion)

2Measurement precision

If delay offset compensation is implemented across multiple TRPs, then CSI reporting accuracy improves, but the processing complexity and computational requirements increase

Engineering Contradiction:

ImproveCSI reporting accuracyVSAvoidprocessing complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent applies preliminary action by having the UE determine delay offset values for each TRP before generating the second CSI report. The delay offset compensation is pre-calculated and applied to the CSI measurements, simplifying the overall processing by separating the compensation step from the CSI generation step

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The delay offset values act as an intermediary element between the multiple TRPs and the final CSI report. The UE measures delay offsets from each TRP, uses these as intermediate compensation factors, and then generates the compensated CSI report, thereby managing the complexity of multi-TRP coordination

Inventive Principle:

Principle #24Intermediary (Mediator)

3Reliability

If simultaneous reporting of CSI and delay offset values is enabled, then calibration accuracy improves, but the reporting overhead and resource utilization increase

Engineering Contradiction:

Improvecalibration accuracyVSAvoidreporting overhead

Core Design Contradiction:

ReliabilityVSQuantity of substance

Solution Approach 1:

The patent merges the reporting of delay offset values and CSI into a coordinated two-report structure where both pieces of information are transmitted in the same reporting instance. The first report carries delay offset values and the second report carries compensated CSI, allowing the network to receive both calibration and channel state information efficiently

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The CSI reporting mechanism is designed with multi-functionality to serve dual purposes: the first CSI report structure is used for delay offset measurement and calibration, while the second CSI report structure provides channel state information with delay compensation. This universal framework reduces overall overhead by using a unified reporting mechanism for both functions

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS20260032495A1Calibration and CSI reporting

Publication Date: 2026.01.29 SAMSUNG ELECTRONICS CO LTD

AI summary

Apparatuses and methods for calibration and channel state information (CSI) reporting. A method performed by a user equipment (UE) includes receiving information about first and second CSI reports. The information indicates for the first CSI report, NTRP CSI reference signal (CSI-RS) resource sets and a report quantity, which corresponds to delay offset (DO) reporting and, for the second CSI report, NTRP CSI-RS resources and a codebook type. The method further includes determining, based on the information, DO values for the first CSI report and determining, based on the information and the DO values, a CSI for the second CSI report. The CSI is determined by compensating for the DO values. The method further includes transmitting the first and second CSI reports in a same reporting instance, the first and second CSI reports include the DO values and the CSI, respectively.