PUCCH Cell Switching for Timing-Aware CSI Reporting

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Solution Overview

Problem

Existing wireless communication systems face challenges in efficiently managing channel state information (CSI) reporting, particularly when physical uplink control channel (PUCCH) cell switching occurs, leading to suboptimal performance and resource allocation.

Innovation Solution

Enhancements in CSI reporting mechanisms are introduced for wireless devices configured with PUCCH cell switching, optimizing channel state information reporting to improve resource allocation and system performance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If PUCCH cell switching is implemented to enable flexible resource allocation, then adaptability is improved, but CSI reporting accuracy deteriorates due to timing constraints and resource conflicts

Engineering Contradiction:

ImprovePUCCH cell switching flexibilityVSAvoidCSI reporting accuracy

Core Design Contradiction:

Adaptability or versatilityVSMeasurement precision

Solution Approach 1:

The patent segments the CSI reporting process into multiple components: a first CSI report transmitted on the first PUCCH resource before cell switching, and a second CSI report transmitted on the second PUCCH resource after cell switching. This segmentation allows accurate CSI reporting at different time points without being affected by the switching operation, thereby maintaining measurement precision while enabling PUCCH cell switching flexibility.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent applies preliminary action by transmitting the first CSI report before the PUCCH cell switching occurs. This ensures that the network has accurate channel state information about the current cell condition before the switching event, allowing for better scheduling decisions and reducing the impact of switching on CSI reporting accuracy.

Inventive Principle:

Principle #10Preliminary action

2Productivity

If CSI reporting is enhanced for PUCCH cell switching scenarios, then resource allocation efficiency is improved, but system complexity increases due to additional reporting mechanisms

Engineering Contradiction:

Improveresource allocation efficiencyVSAvoidCSI reporting mechanism complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent makes the CSI reporting mechanism universal by enabling the same reporting process to serve multiple purposes: reporting CSI before cell switching for initial resource allocation decisions, and reporting CSI after cell switching for post-switching optimization. This multi-functionality improves resource allocation efficiency without requiring entirely separate reporting mechanisms for different scenarios.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent implements feedback by having the wireless device transmit CSI reports both before and after PUCCH cell switching, providing the network with information about channel conditions at different time points. This feedback loop enables the network to optimize resource allocation based on actual channel conditions, improving productivity while managing complexity through structured information collection.

Inventive Principle:

Principle #23Feedback

3Loss of information

If multiple CSI reports are transmitted around PUCCH cell switching, then information completeness is improved, but transmission time increases

Engineering Contradiction:

ImproveCSI information completenessVSAvoidCSI reporting time

Core Design Contradiction:

Loss of informationVSLoss of time

Solution Approach 1:

The patent applies periodic action by transmitting CSI reports at specific periodic intervals relative to the PUCCH cell switching event - one report before switching and one report after switching. This periodic reporting structure ensures information completeness by capturing channel state information at critical time points without requiring continuous transmission, thereby managing the time overhead effectively.

Inventive Principle:

Principle #19Periodic action

Data Source

PatentUS20250358815A1PUCCH Cell Switching and CSI Reporting

Publication Date: 2025.11.20 PANPSY TECHNOLOGIES LLC

AI summary

A wireless device may receive CSI report configuration parameters for CSI reports via a first cell. The wireless device may further receive a time pattern configuration parameter indicating first timings that the first cell is a PUCCH cell in a PUCCH group and second timings that a second cell is the PUCCH cell in the PUCCH group. The wireless device may transmit a first CSI report, scheduled for transmission in a first report timing via the first cell, based on the first report timing being within the first timings. The wireless device may drop a second CSI report, scheduled for transmission in a second report timing via the first cell, based on the second report timing being within the second timings.